Anti-transformation push mechanism for minimally invasive surgical instruments
By setting anti-rotation components on the outer tube and push rod of the pusher, radial relative locking is achieved, solving the problem of relative rotation between the pusher and the outer tube during the operation, and improving the quality and efficiency of the surgery.
Patent Information
- Application Number
- CN202421143670.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The push rod of the existing pusher cannot achieve radial relative locking with the outer tube after sliding into place, resulting in relative rotation between the push rod and the outer tube during the operation, affecting the quality and efficiency of the surgery.
An anti-transformation push mechanism is designed, by providing a first sliding part and a second sliding part on the outer pipe and the push rod, and a first anti-transformation and a second anti-transformation part are provided therebetween, radially relative locking of the outer pipe and the push rod is achieved.
It effectively avoids the relative rotation of the push rod and the outer tube during the operation, and improves the quality and efficiency of the operation.
Smart Images
Figure CN222708373U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of medical devices, and in particular to an anti-transformation pushing mechanism for minimally invasive surgical instruments. Background Art
[0002] A pusher is a medical device that is used to be inserted into the patient's body and can cooperate with the doctor to perform surgical operations in the patient's body. It includes an outer tube and a push rod. The push rod can slide in the outer tube and has a surgical instrument connected to its end. The outer tube is inserted into the patient's body through a wound on the patient's body, and then the push rod slides in the outer tube to drive the surgical instrument at the end of the push rod to the corresponding position in the patient's body, and then the doctor can start the corresponding surgical operation.
[0003] However, the push rod of the above pusher cannot be radially locked with the outer tube after sliding into place. As a result, during the operation, the push rod will rotate relative to the outer tube, causing the surgical instrument connected to the end of the push rod to deflect and move away from the corresponding surgical position, which greatly affects the doctor's surgical quality and efficiency. Utility Model Content
[0004] In order to overcome the deficiencies of the prior art, the present application provides an anti-rotation pushing mechanism for a minimally invasive surgical instrument.
[0005] The anti-transformation push mechanism provided in this application adopts the following technical solution:
[0006] A rotation-proof pushing mechanism for a minimally invasive surgical instrument comprises an outer tube and a pushing rod slidably arranged in the outer tube along its axial direction, a first sliding portion is arranged on one of the outer tube and a second sliding portion is arranged on the other, the first sliding portion is slidably connected to the second sliding portion, a first anti-rotation portion is arranged on the first sliding portion, a second anti-rotation portion is arranged on the second sliding portion, and the second anti-rotation portion abuts against a side of the first anti-rotation portion.
[0007] By adopting the above technical solution, the outer tube and the push rod can achieve radial relative locking with the cooperation of the first anti-rotation part and the second anti-rotation part, effectively avoiding relative rotation between the push rod and the outer tube during the operation, thereby improving the doctor's surgical quality and efficiency.
[0008] In a specific feasible implementation scheme, the first sliding part is a sliding strip provided on the inner wall of the outer tube, the second sliding part is a sliding groove provided on the push rod, the sliding strip is embedded in the sliding groove, the first anti-rotation part includes two first anti-rotation walls respectively formed on both sides of the sliding strip, the second anti-rotation part includes two second anti-rotation walls respectively formed on both sides of the sliding groove, the two first anti-rotation walls correspond one to one with the two second anti-rotation walls, and the corresponding first anti-rotation walls and the second anti-rotation walls are clearance-matched.
[0009] By adopting the above technical solution, not only can the stable sliding of the push rod in the outer tube be ensured, but also after the push rod slides into place, the two second anti-rotation walls can resist the two first anti-rotation walls, effectively preventing the push rod from rotating.
[0010] In a specific possible implementation manner, the length direction of the slide bar is the same as the length direction of the outer tube, and the length direction of the slide groove is the same as the length direction of the push rod.
[0011] In a specific possible implementation manner, the distance between the two first anti-rotation walls gradually increases along the direction from the slide bar to the slide groove, and the distance between the two second anti-rotation walls gradually decreases along the direction from the slide groove to the slide bar.
[0012] By adopting the above technical solution, not only the anti-rotation effect can be further improved, but also the slide bar can be prevented from being separated from the slide groove.
[0013] In a specific feasible implementation scheme, the inner wall of the outer tube is further provided with a connecting strip, the sliding strip is installed on the connecting strip, first anti-rotation plates are respectively provided on both sides of the sliding groove, an anti-rotation gap is formed between the two first anti-rotation plates, and the connecting strip is accommodated in the anti-rotation gap.
[0014] By adopting the above technical solution, the two first anti-rotation plates can resist against the two side portions of the connecting strip, further improving the anti-rotation effect.
[0015] In a specific feasible implementation scheme, a second anti-rotation plate is connected to the first anti-rotation plate, the second anti-rotation plate is arranged at an angle to the first anti-rotation plate, an anti-rotation groove is opened on the connecting strip along its length direction, the second anti-rotation plate is embedded in the anti-rotation groove and is slidably connected to the anti-rotation groove.
[0016] By adopting the above technical solution, not only the anti-rotation effect can be further improved, but also the sliding of the push rod in the outer tube will not be affected.
[0017] In a specific possible implementation manner, the second anti-rotation plate is perpendicular to the first anti-rotation plate.
[0018] In a specific implementation scheme, there are two slide bars, which are respectively located on both sides of the outer tube in a radial direction, and there are two slide grooves, which are respectively located on both sides of the push rod in a radial direction and correspond one to one with the two slide bars.
[0019] By adopting the above technical solution, the sliding stability of the push rod is further improved.
[0020] In a specific possible implementation manner, the outer tube includes a tube body and a hollow hand-held seat connected to one end of the tube body, and the first sliding part is provided on one of the hand-held seat and the push rod, and the second sliding part is provided on the other of the two.
[0021] By adopting the above technical solution, it is convenient for doctors to hold the outer tube and operate the pushing rod.
[0022] In a specific possible implementation scheme, a first convex ring is provided in the tube body, a second convex ring is provided on the push rod, a spring is provided between the first convex ring and the second convex ring, the spring is sleeved on the push rod and its two ends are respectively connected to the first convex ring and the second convex ring.
[0023] By adopting the above technical solution, not only is it convenient for doctors to operate the push rod, but the anti-rotation effect can also be further improved.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] The anti-rotation pushing mechanism of the present application, the outer tube and the pushing rod thereon can achieve radial relative locking with the cooperation of the first anti-rotation part and the second anti-rotation part, effectively avoiding relative rotation between the pushing rod and the outer tube during the operation, thereby improving the doctor's surgical quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the external structure of the pushing mechanism of Example 1 / Example 2 / Example 3 of the present application.
[0027] Figure 2 yes Figure 1 AA cross-sectional view when used in Example 1.
[0028] Figure 3 yes Figure 1 Schematic diagram of the BB cross section.
[0029] Figure 4 yes Figure 3 The enlarged schematic diagram is shown in Figure 2.
[0030] Figure 5 yes Figure 1 AA cross-sectional view when used in Example 2.
[0031] Figure 6 yes Figure 1 AA cross-sectional view when used in Example 3.
[0032] Description of reference numerals:
[0033] 1. Outer tube; 1a. Tube body; 1b. Hand-held seat; 2. Push rod; 3. First sliding part; 4. Second sliding part; 5. First anti-rotation part; 51. First anti-rotation wall; 6. Second anti-rotation part; 61. Second anti-rotation wall; 7. Connecting strip; 8. First anti-rotation plate; 9. Second anti-rotation plate; 10. Anti-rotation groove; 11. First convex ring; 12. Second convex ring; 13. Spring; 14. Support rod. DETAILED DESCRIPTION
[0034] The present application is further described in detail below in conjunction with the accompanying drawings.
[0035] Embodiment 1:
[0036] See also Figure 1-4 As shown, there is shown an anti-transformation pushing mechanism for minimally invasive surgical instruments, including an outer tube 1 and a pushing rod 2 that is slidable along its axial direction and penetrates the outer tube 1. In this embodiment, the anti-transformation pushing mechanism is used for pushing a tissue recovery bag. Two deformable support rods 14 are provided at the end of the pushing rod 2, and the two support rods 14 are bent and the bending directions of the two are opposite. The two support rods 14 can be relatively closed and accommodated in the outer tube 1, or relatively opened and respectively penetrated into the tissue recovery bag from both sides of the bag opening of the tissue recovery belt.
[0037] A first sliding portion 3 is provided on the inner wall of the outer tube 1, a second sliding portion 4 is provided on the push rod 2, the first sliding portion 3 is slidably connected with the second sliding portion 4, a first anti-rotation portion 5 is provided on the first sliding portion 3, a second anti-rotation portion 6 is provided on the second sliding portion 4, and the second anti-rotation portion 6 is against the side of the first anti-rotation portion 5.
[0038] In this way, the outer tube 1 and the push rod 2 can achieve radial relative locking with the cooperation of the first anti-rotation part 5 and the second anti-rotation part 6, effectively avoiding relative rotation between the push rod 2 and the outer tube 1 during the operation, thereby improving the doctor's surgical quality and efficiency.
[0039] In this embodiment, if Figure 2As shown, the first sliding part 3 is a slide bar provided on the inner wall of the outer tube 1 and extending along the axial direction of the outer tube 1, the second sliding part 4 is a slide groove provided on the push rod 2, the length direction of the slide bar is the same as the length direction of the outer tube 1, the length direction of the slide groove is the same as the length direction of the push rod 2, the slide bar is embedded in the slide groove, the first anti-rotation part 5 includes two first anti-rotation walls 51 respectively formed on both sides of the slide bar, the two first anti-rotation walls 51 are parallel to each other, the second anti-rotation part 6 includes two second anti-rotation walls 61 respectively formed on both sides of the slide groove, the two second anti-rotation walls 61 are parallel to each other, the two first anti-rotation walls 51 correspond to the two second anti-rotation walls 61 one by one, and the corresponding first anti-rotation walls 51 and the second anti-rotation walls 61 are gap-matched. After the push rod 2 slides into place, the two second anti-rotation walls 61 can resist the two first anti-rotation walls 51, effectively preventing the push rod from rotating.
[0040] There are two slide bars, which are respectively located on both sides of the outer tube 1 in the radial direction, and there are two slide grooves, which are respectively located on both sides of the push rod 2 in the radial direction and correspond to the two slide bars one by one.
[0041] In this embodiment, if Figure 3 As shown, the outer tube 1 includes a tube body 1a and a hollow hand-held seat 1b connected to one end of the tube body 1a. A first sliding portion 3 is arranged in the hand-held seat 1b, and a second sliding portion 4 is arranged on the push rod 2.
[0042] like Figure 4 As shown, a first convex ring 11 is provided in the tube body 1a, a second convex ring 12 is provided on the push rod 2, a spring 13 is provided between the first convex ring 11 and the second convex ring 12, the spring 13 is sleeved on the push rod 2 and its two ends are respectively connected to the first convex ring 11 and the second convex ring 12. Among them, the second convex ring 12 is located on the side of the first convex ring 11 away from the hand-held seat 1b.
[0043] When the doctor pulls the push rod 2, the first convex ring 11 and the second convex ring 12 can compress the spring 13, and when the doctor releases the push rod 2, the push rod 2 can be reset under the action of the spring 13, so that one end of the push rod 2 passes through the outer tube 1 and remains in the passed-out state under the action of the spring 13, which is convenient for the doctor to operate the surgical instrument; at the same time, the two ends of the spring 13 are respectively connected to the first convex ring 11 and the second convex ring 12, which can also further enhance the anti-rotation effect.
[0044] Embodiment 2:
[0045] like Figure 5 As shown, in this embodiment, the difference from Embodiment 1 is only that:
[0046] The distance between the two first anti-rotation walls 51 gradually increases along the direction from the slide bar to the slide groove, and the two first anti-rotation walls 51 can be enclosed into a step shape; the distance between the two second anti-rotation walls 61 gradually decreases along the direction from the slide groove to the slide bar, and the two second anti-rotation walls 61 can be enclosed into a dovetail shape.
[0047] In this way, the two first anti-rotation walls 51 forming a step shape can be tightly embedded in the two second anti-rotation walls 61 forming a dovetail shape, which can not only further enhance the anti-rotation effect, but also prevent the slide bar from escaping from the slide groove.
[0048] Embodiment 3:
[0049] like Figure 6 As shown, in this embodiment, the difference from Embodiment 1 and Embodiment 2 is only that:
[0050] The inner wall of the outer tube 1 is also provided with a connecting strip 7, the slide bar is installed on the connecting strip 7, and first anti-rotation plates 8 are respectively provided on both sides of the slide groove, and an anti-rotation gap is formed between the two first anti-rotation plates 8, and the connecting strip 7 is accommodated in the anti-rotation gap. The two first anti-rotation plates 8 can resist the two sides of the connecting strip 7, further improving the anti-rotation effect.
[0051] In this embodiment, the first anti-rotation plate 8 is connected to the second anti-rotation plate 9, the second anti-rotation plate 9 is perpendicular to the first anti-rotation plate 8, the connecting strip 7 is provided with an anti-rotation groove 10 along its length direction, the second anti-rotation plate 9 is embedded in the anti-rotation groove 10 and is slidably connected to the anti-rotation groove 10. In this way, not only can the anti-rotation effect be further improved, but also the sliding of the push rod 2 in the outer tube 1 will not be affected.
[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. An anti-transformation pushing mechanism for a minimally invasive surgical instrument, comprising an outer tube (1) and a pushing rod (2) slidably disposed in the outer tube (1) along its axial direction, characterized in that: A first sliding portion (3) is provided on one of the outer tube (1) and the push rod (2), and a second sliding portion (4) is provided on the other of the outer tube (1). The first sliding portion (3) is slidably connected to the second sliding portion (4). A first anti-rotation portion (5) is provided on the first sliding portion (3), and a second anti-rotation portion (6) is provided on the second sliding portion (4). The second anti-rotation portion (6) abuts against the side of the first anti-rotation portion (5).
2. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 1, characterized in that: The first sliding part (3) is a sliding strip arranged on the inner wall of the outer tube (1), the second sliding part (4) is a sliding groove arranged on the pushing rod (2), the sliding strip is embedded in the sliding groove, the first anti-rotation part (5) includes two first anti-rotation walls (51) respectively formed on both sides of the sliding strip, the second anti-rotation part (6) includes two second anti-rotation walls (61) respectively formed on both sides of the sliding groove, the two first anti-rotation walls (51) correspond to the two second anti-rotation walls (61) one by one, and the corresponding first anti-rotation walls (51) and the second anti-rotation walls (61) are clearance-matched.
3. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 2, characterized in that: The length direction of the slide bar is the same as the length direction of the outer tube (1), and the length direction of the slide groove is the same as the length direction of the push rod (2).
4. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 2, characterized in that: The distance between the two first anti-rotation walls (51) gradually increases along the direction from the slide bar to the slide groove, and the distance between the two second anti-rotation walls (61) gradually decreases along the direction from the slide groove to the slide bar.
5. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 2, characterized in that: The inner wall of the outer tube (1) is also provided with a connecting strip (7), the sliding strip is installed on the connecting strip (7), and first anti-rotation plates (8) are respectively provided on both sides of the sliding groove. An anti-rotation gap is formed between the two first anti-rotation plates (8), and the connecting strip (7) is accommodated in the anti-rotation gap.
6. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 5, characterized in that: The first anti-rotation plate (8) is connected to a second anti-rotation plate (9), the second anti-rotation plate (9) and the first anti-rotation plate (8) are arranged at an angle, the connecting strip (7) is provided with an anti-rotation groove (10) along its length direction, the second anti-rotation plate (9) is embedded in the anti-rotation groove (10) and is slidably connected to the anti-rotation groove (10).
7. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 6, characterized in that: The second anti-rotation plate (9) is perpendicular to the first anti-rotation plate (8).
8. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 2, characterized in that: There are two slide bars, which are respectively located on both sides of the outer tube (1) in the radial direction. There are two slide grooves, which are respectively located on both sides of the push rod (2) in the radial direction and correspond one to one with the two slide bars.
9. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 1, characterized in that: The outer tube (1) comprises a tube body (1a), a hollow hand-held seat (1b) connected to one end of the tube body (1a), and one of the hand-held seat (1b) and the push rod (2) is provided with the first sliding part (3), and the other is provided with the second sliding part (4).
10. The anti-transformation pushing mechanism for minimally invasive surgical instruments according to claim 9, characterized in that: A first convex ring (11) is arranged in the tube body (1a), a second convex ring (12) is arranged on the push rod (2), a spring (13) is arranged between the first convex ring (11) and the second convex ring (12), the spring (13) is sleeved on the push rod (2) and its two ends are respectively connected to the first convex ring (11) and the second convex ring (12).