CN112472166B - Single-hole adjustable non-invasive retractor - Google Patents

Abstract

The single-hole adjustable non-invasive retractor provided by the present invention includes a holding part, a first rod body, a second rod body, a third rod body and a movable forceps connected in sequence; the first rod body is hinged with the second rod body, and the first rod body is hinged with the second rod body. The second rod body is hinged with the third rod body; the hinge joint of the first rod body and the second rod body, and the hinge joint of the second rod body and the third rod body are respectively provided with steering components; the movable pliers include a first arc shape A pliers body, a second arc-shaped pliers body and an occlusal assembly, the occlusal assembly is used to drive the first arc-shaped pliers body and the second arc-shaped pliers body to move toward or in opposite directions; a control unit is arranged on the grip portion. The single-hole adjustable non-invasive retractor provided by the present invention bends the second rod body and the third rod body extending into the abdominal cavity, so that the retractor is not disturbed by other surgical equipment during operation, and the operation difficulty is reduced At the same time, two curved forceps with adjustable clamping diameter are arranged to protect the intestine during the process of clamping and pulling the intestine.

Description

Single-hole adjustable non-invasive retractor

technical field

The invention relates to the technical field of medical devices, in particular to a single-hole adjustable non-invasive retractor.

Background technique

In laparoscopic surgery, a working channel must be established on the abdominal wall through trocars, and surgical instruments such as slender surgical forceps, electric hooks, and ultrasonic scalpels enter the cavity through the trocars to perform surgical operations to remove lesions. During abdominal surgery, intestines with different diameters, such as the small intestine and colon, need to be clipped and pulled to other places so as not to hinder the development of abdominal surgery. The existing method is to insert forceps through the abdominal cavity, which is easy to scratch. Intestinal epidermis and even hemorrhage, when multiple instruments are used for collaborative operation, it is easy to be interfered by other instruments when clamping the intestine with surgical forceps, which increases the difficulty of the operation and prolongs the operation time.

SUMMARY OF THE INVENTION

In view of the defects in the prior art, the single-hole adjustable non-invasive retractor provided by the present invention solves the problem that the existing abdominal surgery equipment can easily scratch the intestinal epidermis and even cause bleeding when the intestine is clamped and pulled. Technical problems that are not conducive to the collaborative operation of multiple instruments.

In order to achieve the above object, the present invention realizes through the following technical solutions:

A single-hole adjustable non-invasive retractor, comprising a holding part, a first rod body, a second rod body, a third rod body and a movable forceps connected in sequence; the first rod body and the second rod body are hinged, and the second rod body It is hinged with the third rod body; the hinge joint of the first rod body and the second rod body, and the hinge joint of the second rod body and the third rod body are respectively provided with steering components; the movable pliers include a first arc-shaped pliers body , a second arc-shaped pliers body and an occlusal assembly, the occlusal assembly is used to drive the first arc-shaped pliers body and the second arc-shaped pliers body to move toward or in opposite directions; a unit for controlling the actions of the steering assembly and the bite assembly;

The steering assembly in which the first rod body and the second rod body are hinged includes a first rack, a driving gear, a transmission gear, a steering gear, a pinion and a first drive unit; the first rack is slidably connected to the inner wall of the first rod , the sliding direction of the first rack is consistent with the extension direction of the first rod body, the driving gear, the transmission gear and the steering gear are respectively connected to the first rod body in rotation, and the driving gear, the transmission gear and the steering gear are sequentially meshed and driven , the driving gear is also meshed with the first rack for transmission; the second rod body is provided with the pinion at one end of the rod body facing the first rod body, and the pinion meshes with the steering gear; the first drive unit is arranged on the first The inside of the rod body is connected with the first rack to drive the first rack to slide back and forth; the steering assembly hingedly connected with the second rod body and the third rod body, and the steering assembly structure hinged with the first rod body and the second rod body same;

It also includes a fourth rod body, one end of the fourth rod body is rotatably connected with the third rod body, and the other end of the fourth rod body is connected with the movable clamp, and the engaging component includes a first gear, a second gear, a third gear, a second a rack and a second drive unit; the second rack is slidably connected to the inner wall of the fourth rod, the sliding direction of the second rack is consistent with the extending direction of the fourth rod, the first gear, the second gear and the The third gears are all rotatably connected to the fourth rod body, the first gear, the second gear and the third gear are meshed for transmission in sequence, and the third gear is also meshed with the second rack for transmission; the first arc-shaped pliers The body is fixedly connected with the side wall of the fourth rod body, the second arc-shaped clamp body is fixedly connected with the first gear; the second driving unit is arranged inside the fourth rod body and connected with the second rack for driving the first gear The two racks slide back and forth.

Optionally, the axis lines of the driving gear, the transmission gear and the steering gear are coplanar, and the diameter of the index circle of the drive gear is larger than the diameter of the index circle of the transmission gear.

Optionally, the first driving unit includes a first cylinder, and the end of the piston rod of the first cylinder is fixedly connected to one end of the first rack.

Optionally, the outer sides of the first arc-shaped forceps body and the second arc-shaped forceps body are both covered with a flexible layer.

Optionally, the second driving unit includes a second cylinder, and the end of the piston rod of the second cylinder is fixedly connected to one end of the second rack.

Optionally, the third rod body includes an upper rod body and a lower rod body, an end of the inner wall of the lower rod facing the fourth rod body is provided with a rotary motor, and the output shaft of the rotary motor is fixedly connected to the fourth rod body.

Optionally, the cross-sectional contours of the first rod body, the second rod body and the third rod body are sequentially increased.

As can be seen from the above technical solutions, the beneficial effects of the present invention:

The single-hole adjustable non-invasive retractor provided by the present invention includes a holding part, a first rod body, a second rod body, a third rod body and a movable forceps connected in sequence; the first rod body is hinged with the second rod body, and the first rod body is hinged with the second rod body. The second rod body is hinged with the third rod body; the hinge joint of the first rod body and the second rod body, and the hinge joint of the second rod body and the third rod body are respectively provided with steering components; the movable pliers include a first arc shape A pliers body, a second arc-shaped pliers body and an occlusal assembly, the occlusal assembly is used to drive the first arc-shaped pliers body and the second arc-shaped pliers body to move toward or in opposite directions; The control unit is used for controlling the actions of the steering assembly and the engaging assembly. The single-hole adjustable non-invasive retractor provided by the present invention bends the second rod body and the third rod body extending into the abdominal cavity, so that the retractor is not disturbed by other surgical equipment during operation, and the operation difficulty is reduced At the same time, two curved forceps with adjustable clamping diameter are arranged to protect the intestine during the process of clamping and pulling the intestine.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the specific embodiments or the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. In the drawings, each element or section is not necessarily drawn to actual scale.

Figure 1 is a schematic diagram of the three-dimensional structure of a single-hole adjustable non-invasive retractor;

Figure 2 is a sectional view of the single-hole adjustable non-invasive retractor in a straight state;

Fig. 3 is the enlarged view of A place in Fig. 2;

Fig. 4 is an enlarged view at B in Fig. 2;

5 is a schematic structural diagram of a third rod body and a fourth rod body;

6 is a sectional view of the single-hole adjustable non-invasive retractor in a bent state;

Fig. 7 is the enlarged view of C place in Fig. 6;

Reference number:

1-holding part, 2-first rod body, 3-second rod body, 4-third rod body, 5-fourth rod body, 6-steering assembly, 7-active pliers;

11-button, 41-lower rod body, 42-upper rod body, 43-rotating motor, 61-first rack, 62-main gear, 63-transmission gear, 64-steering gear, 65-gear shaper, 66-first Cylinder, 71-first arc-shaped clamp body, 72-second arc-shaped clamp body, 73-first gear, 74-second gear, 75-third gear, 76-second rack, 77-second cylinder .

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "left shift", "right shift", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the accompanying drawings , is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood through specific situations.

A single-hole adjustable non-invasive retractor provided by the present invention, please refer to FIGS. 1-2 , including a grip portion 1 , a first rod body 2 , a second rod body 3 , a third rod body 4 and a movable forceps 7 connected in sequence. The first rod body 2 is hinged with the second rod body 3, and the second rod body 3 is hinged with the third rod body 4; the hinge joint between the first rod body 2 and the second rod body 3, and the second rod body 3 and the The hinge joints of the three rod bodies 4 are respectively provided with steering assemblies 6 . The movable forceps 7 includes a first arc-shaped forceps body 71 , a second arc-shaped forceps body 72 and an occlusal assembly, which is used to drive the first arc-shaped forceps body 71 and the second arc-shaped forceps body 72 to face or be opposite Movement, the outer sides of the first arc-shaped forceps body 71 and the second arc-shaped forceps body 72 are covered with a flexible layer so as to protect the intestines when they are gripped and pulled by the movable forceps 7; the gripping portion 1 There is a control unit on it, and the control unit is used to control the actions of the steering assembly 6 and the engaging assembly. The single-hole adjustable non-invasive retractor provided by the present invention bends the second rod body and the third rod body extending into the abdominal cavity, so that the retractor is not disturbed by other surgical equipment during operation, and the operation difficulty is reduced At the same time, two arc-shaped forceps with adjustable clamping diameter are arranged to protect the intestine during the process of clamping and pulling the intestine, and at the same time, the clamping diameter of the movable forceps can be adjusted for intestines with different diameters.

Specifically, taking the first rod body 2 and the second rod body 3 as an example, please refer to FIG. 3 , the steering assembly 6 includes a first rack 61 , a driving gear 62 , a transmission gear 63 , a steering gear 64 , a tooth shaper 65 and a first gear A drive unit; the first rack 61 is slidably connected to the inner wall of the first rod body 2, the sliding direction of the first rack 61 is consistent with the extending direction of the first rod body 2, the driving gear 62, the transmission gear 63 and the steering The gears 64 are respectively connected in rotation with the first rod body 2 , the driving gear 62 , the transmission gear 63 and the steering gear 64 are meshed for transmission in sequence, and the driving gear 62 is also meshed with the first rack 61 for transmission; the second rod body 3 One end of the first rod body 2 is provided with the pinion 65, and the pinion 65 meshes with the steering gear 64. In particular, the centerline of the hinge between the second rod 3 and the first rod 2 is the axis line of the steering gear 64. collinear, so that the steering gear 64 drives the tooth 65 to rotate synchronously, and the tooth 65 is fixedly connected with the second rod body 3 so as to complete the steering of the second rod body 3 through the rotation of the steering gear 64; A rod body 2 is inside and connected to the first rack 61 for driving the first rack 61 to slide back and forth. Please refer to FIG. 3 and FIG. 7 , before the operation, the second rod body 3 and the first rod body 2 are straight so as to extend into the abdominal cavity after passing through the punching hole. At this time, the middle part of the first rack 61 is connected to the driving gear 62 meshes; during the operation, the first rack 61 moves to the right under the drive of the first drive unit, the driving gear 62 rotates counterclockwise, drives the transmission gear 63 to rotate clockwise, drives the steering gear 64 to rotate counterclockwise, and then drives the insertion The teeth 65 and the second rod body 3 rotate counterclockwise (as shown in FIG. 7 ). On the contrary, if the first rack 61 moves to the left, the second rod body 3 rotates clockwise. Preferably, the axis lines of the driving gear 62 , the transmission gear 63 and the steering gear 64 are coplanar, and the index circle diameter of the drive gear 62 is larger than the index circle diameter of the transmission gear 63 to avoid the first tooth When the bar 61 moves toward the steering gear 64 side, the transmission gear 63 collides with the first rack 61 and damages the steering assembly 6 . The transmission gear 63 is provided to leave a travel space for the first rack 61 . Wherein, the first drive unit is one of a cylinder or a screw-slider mechanism. In one embodiment, the first driving unit includes a first cylinder 66 , and the end of the piston rod of the first cylinder 66 is fixedly connected to one end of the first rack 61 , and the first cylinder is controlled by the control unit on the grip 1 . 66 The extension and retraction of the piston rod. In another embodiment, the first drive unit includes a screw motor and a screw, one end of the first rack 61 away from the steering gear 64 is threadedly connected to the screw, and the screw motor is connected to the screw drive through the screw motor. The reciprocating sliding of the first rack 61 is driven.

As a further improvement to the above solution, the single-hole adjustable non-invasive retractor further includes a fourth rod body 5, one end of the fourth rod body 5 is rotatably connected with the third rod body 4, and the other end of the fourth rod body 5 is connected with the movable rod body 5. Clamp 7 is connected. By setting the fourth rod body 5 so that the movable forceps 7 has a rotation function, it is convenient for the movable forceps 7 to adjust the incision angle when gripping the intestinal tract in the abdominal cavity, so as to facilitate the operation. Specifically, please refer to FIG. 5 , the third rod body 4 includes an upper rod body 42 and a lower rod body 41 , and the design is divided into two to facilitate the arrangement of components inside the rod body. Similarly, the first rod body 2 , the second rod body 3 and the The fourth rod body 5 is a structure pattern that is divided into two. The inner wall of the lower rod body 41 is provided with a rotary motor 43 at one end facing the fourth rod body 5 . The output shaft of the rotary motor 43 is fixedly connected with the fourth rod body 5 , and the fourth rod body 5 is driven to rotate by the rotary motor 43 built in the third rod body 4 . . Preferably, the cross-sectional profiles of the first rod body 2 , the second rod body 3 and the third rod body 4 increase in sequence, that is, the cross-sectional profile of the third rod body 4 > the cross-sectional profile of the second rod body 3 > the cross-sectional profile of the first rod body 2 , since the first rod body 2 needs to remain in the poke hole, the cross-sectional profile of the first rod body 2 is designed to be small to leave a passage space for other surgical equipment, and the second rod body 3 and the third rod body 4 can be extended into the abdominal cavity. The design is larger to facilitate more convenient arrangement of components inside the rod body, such as facilitating the arrangement of the rotating motor 43 in the third rod body 4 .

As a further improvement to the above solution, please refer to FIG. 4 , the engaging assembly includes a first gear 73 , a second gear 74 , a third gear 75 , a second rack 76 and a second drive unit; the second rack 76 is slidably connected to the inner wall of the fourth rod body 5, the sliding direction of the second rack 76 is consistent with the extending direction of the fourth rod body 5, the first gear 73, the second gear 74 and the third gear 75 are respectively connected with the fourth The rod body 5 is rotatably connected, the first gear 73, the second gear 74 and the third gear 75 are meshed for transmission in sequence, and the third gear 75 is also meshed with the second rack 76 for transmission; the first arc-shaped clamp body 71 It is fixedly connected with the side wall of the fourth rod body 5, and the second arc-shaped clamp body 72 is fixedly connected with the first gear 73, that is, the first arc-shaped clamp body 71 and the second arc-shaped clamp body 72 move toward or in opposite directions depending on the first gear. The forward and reverse rotation of a gear 73; the second driving unit is disposed inside the fourth rod body 5 and connected to the second rack 76 for driving the second rack 76 to slide back and forth. The kinematic mechanism of the bite assembly is referred to the steering assembly 6 . Wherein, the second driving unit is one of a cylinder or a screw-slider mechanism. In one embodiment, the second driving unit includes a second cylinder 77 , and the end of the piston rod of the second cylinder 77 is fixedly connected to one end of the second rack 76 .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. The scope of the invention should be included in the scope of the claims and description of the present invention.

Claims (7)

1. A single-hole adjustable non-invasive retractor, characterized in that: it comprises a holding part (1), a first rod body (2), a second rod body (3), a third rod body (4) and a movable pliers (7); the first rod body (2) is hinged with the second rod body (3), the second rod body (3) is hinged with the third rod body (4); the first rod body (2) is hinged with the second rod body (3) A steering assembly (6) is respectively provided at the hinge joint of the rod body (3) and the hinge joint of the second rod body (3) and the third rod body (4); the movable clamp (7) includes a first arc clamp a body (71), a second arc-shaped forceps body (72) and an occlusal assembly for driving the first arc-shaped forceps body (71) and the second arc-shaped forceps body (72) to move toward or in opposite directions; A control unit is provided on the grip portion (1), and the control unit is used to control the actions of the steering assembly (6) and the engaging assembly; The steering assembly (6) hingedly connected with the first rod body (2) and the second rod body (3) comprises a first rack (61), a driving gear (62), a transmission gear (63), a steering gear (64), a pinion Teeth (65) and a first drive unit; the first rack (61) is slidably connected to the inner wall of the first rod body (2), and the sliding direction of the first rack (61) extends with the first rod body (2) In the same direction, the driving gear (62), the transmission gear (63) and the steering gear (64) are respectively connected in rotation with the first rod body (2), the driving gear (62), the transmission gear (63) and the steering gear (64) Mesh transmission in sequence, the driving gear (62) is also meshed with the first rack (61) for transmission; the end of the second rod body (3) facing the first rod body (2) is provided with the pinion (65) ), the pinion (65) meshes with the steering gear (64); the first drive unit is arranged inside the first rod body (2) and connected with the first rack (61) for driving the first tooth The bar (61) slides back and forth; the steering assembly (6) hingedly connected with the second rod body (3) and the third rod body (4), and the steering assembly hinged with the first rod body (2) and the second rod body (3) (6) The structure is the same; It also includes a fourth rod body (5), one end of the fourth rod body (5) is rotatably connected with the third rod body (4), the other end of the fourth rod body (5) is connected with the movable clamp (7), and the occlusal assembly is comprising a first gear (73), a second gear (74), a third gear (75), a second rack (76) and a second drive unit; the second rack (76) and the fourth rod body (5) ) The inner wall is slidably connected, the sliding direction of the second rack (76) is consistent with the extending direction of the fourth rod body (5), the first gear (73), the second gear (74) and the third gear (75) They are all rotatably connected with the fourth rod body (5) respectively, the first gear (73), the second gear (74) and the third gear (75) are meshed for transmission in sequence, and the third gear (75) is also connected with the second gear (75). The rack (76) engages and drives; the first arc-shaped clamp body (71) is fixedly connected to the side wall of the fourth rod body (5), and the second arc-shaped clamp body (72) is fixed to the first gear (73) connection; the second driving unit is arranged inside the fourth rod body (5) and connected with the second rack (76), so as to drive the second rack (76) to slide back and forth. 2. The single-hole adjustable non-invasive retractor according to claim 1, wherein the axis lines of the driving gear (62), the transmission gear (63) and the steering gear (64) are coplanar, and all The index circle diameter of the driving gear (62) is larger than the index circle diameter of the transmission gear (63). 3. The single-hole adjustable non-invasive retractor according to claim 1, wherein the first driving unit comprises a first air cylinder (66), and the end of the piston rod of the first air cylinder (66) is connected to the One end of the first rack (61) is fixedly connected. 4. The single-hole adjustable non-invasive retractor according to claim 1, wherein the outer sides of the first arc-shaped forceps body (71) and the second arc-shaped forceps body (72) are covered with a flexible layer . 5. The single-hole adjustable non-invasive retractor according to claim 1, wherein the second driving unit comprises a second air cylinder (77), and the end of the piston rod of the second air cylinder (77) is connected to the One end of the second rack (76) is fixedly connected. 6. The single-hole adjustable non-invasive retractor according to claim 5, wherein the third rod body (4) comprises an upper rod body (42) and a lower rod body (41), and the lower rod body (41) An end of the inner wall facing the fourth rod body (5) is provided with a rotary motor (43), and the output shaft of the rotary motor (43) is fixedly connected to the fourth rod body (5). 7 . The single-hole adjustable non-invasive retractor according to claim 6 , wherein the cross-sectional contours of the first rod body ( 2 ), the second rod body ( 3 ) and the third rod body ( 4 ) are sequentially increased. 8 . .

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