Pushing mechanism of minimally invasive surgical instrument

Abstract

The utility model discloses a pushing mechanism of a minimally invasive surgical instrument, and relates to the technical field of medical instruments. The pushing mechanism of the minimally invasive surgical instrument comprises an outer tube and a pushing rod which is arranged in the outer tube in a sliding and penetrating mode in the axial direction of the outer tube, a plurality of locking positions are arranged on the pushing rod at intervals in the axial direction of the pushing rod, each locking position is provided with a first locking piece, and a second locking piece is arranged in the outer tube; the second locking piece can be locked on one of the first locking pieces in the sliding process of the pushing rod. According to the pushing mechanism, the pushing rod and the outer pipe on the pushing mechanism can be axially and relatively locked under the cooperation of the first locking piece and the second locking piece, so that a doctor does not need to continuously control the position and state of the pushing rod during an operation, and the quality and efficiency of the operation are improved; meanwhile, injury to the body of the patient caused by misoperation of the pushing rod by the doctor in the operation process is also avoided.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a pushing mechanism of a minimally invasive surgical instrument. 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 is extended and retracted 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 on the above-mentioned pusher cannot achieve axial relative locking with the outer tube after sliding into place, so the doctor needs to continuously control the position and state of the push rod during the operation, which greatly reduces the doctor's concentration on the operation, thereby reducing the quality and efficiency of the operation; at the same time, if the doctor misoperates the push rod during the operation, it will cause great damage to the patient's body. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the present application provides a pushing mechanism of a minimally invasive surgical instrument capable of relatively locking a pushing rod and an outer tube in the axial direction.

[0005] The pushing mechanism of a minimally invasive surgical instrument provided in this application adopts the following technical solution:

[0006] A pushing mechanism of a minimally invasive surgical instrument comprises an outer tube, a pushing rod slidable along its axial direction and penetrating the outer tube, the pushing rod being provided with a plurality of locking positions spaced apart along its axial direction, each locking position being provided with a first locking piece, a second locking piece being provided in the outer tube, and the second locking piece being capable of being locked to one of the first locking pieces during the sliding process of the pushing rod.

[0007] By adopting the above technical solution, the push rod and the outer tube can achieve axial relative locking with the cooperation of the first locking piece and the second locking piece, so that the doctor no longer needs to continuously control the position and state of the push rod during the operation, thereby improving the quality and efficiency of the operation; at the same time, it also avoids the doctor's misoperation of the push rod during the operation and causing damage to the patient's body.

[0008] 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 second locking member is disposed in the hand-held seat.

[0009] By adopting the above technical solution, the doctor can hold the outer tube through the hand-held seat, which is convenient for the doctor to operate the pushing rod.

[0010] In a specific possible implementation manner, the first locking member is a locking groove provided on the locking position, and the second locking member is movably arranged and can be embedded in the locking groove or detached from the locking groove.

[0011] By adopting the above technical solution, the relative locking effect between the push rod and the outer tube is effectively improved.

[0012] In a specific possible implementation manner, a plurality of saw teeth are arranged on the push rod along the axial direction thereof at intervals, and the locking groove is formed between two adjacent saw teeth.

[0013] By adopting the above technical solution, the locking groove formed by two adjacent serrations is V-shaped, and the V-shaped locking groove will not interfere with the disengagement of the second locking piece, making it easy for the doctor to adjust the position of the push rod.

[0014] In a specific implementation manner, the second locking member is a deformable spring sheet provided on the inner wall of the outer tube, and the spring sheet is embedded in one of the locking grooves.

[0015] By adopting the above technical solution, the spring piece can be engaged with the locking groove through its own elastic force, and can also be easily disengaged from the locking groove when the doctor applies external force, which is easy to operate and has a good locking effect.

[0016] In a specific implementation scheme, a first mounting groove is opened on the inner wall of the outer tube, the spring piece is V-shaped, the two ends of the spring piece are respectively abutted against the two end groove walls of the first mounting groove, and the bottom of the spring piece is embedded in one of the locking grooves.

[0017] In a specific possible implementation scheme, the second locking member includes a locking rod movable in the radial direction of the push rod in the outer tube, one end of the locking rod is embedded in one of the locking grooves, and the other end is coaxially provided with a spring, and the end of the spring away from the locking rod is connected to the inner wall of the outer tube.

[0018] By adopting the above technical solution, the locking rod can be engaged with the locking groove under the elastic force of the spring, and can also be easily disengaged from the locking groove when the doctor applies external force. The operation is convenient and the locking effect is good.

[0019] In a specific possible implementation manner, a second installation groove is formed on the inner wall of the outer tube, and the spring is accommodated in the second installation groove.

[0020] In a specific possible implementation scheme, the push rod is provided with scale lines along its axial direction, and the multiple scales constituting the scale lines correspond to the multiple locking grooves.

[0021] By adopting the above technical solution, it is convenient for doctors to determine the extension length of the push rod, thereby preventing the push rod from extending too long and causing damage to the patient's body.

[0022] In a specific possible implementation manner, an observation window is further provided on the outer tube, and the projection of the observation window on the push rod coincides with the scale line.

[0023] By adopting the above technical solution, it is convenient for doctors to observe the scale lines.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] The push mechanism of the present application, the push rod and the outer tube thereon can achieve axial relative locking under the cooperation of the first locking piece and the second locking piece, so that the doctor no longer needs to continuously control the position and state of the push rod during the operation, thereby improving the quality and efficiency of the operation; at the same time, it also avoids the doctor's misoperation of the push rod during the operation and causing damage to the patient's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the pushing mechanism of the embodiment of the present application.

[0027] Figure 2 yes Figure 1 Schematic diagram of the AA section in.

[0028] Figure 3 It is a rear view of the pushing mechanism of the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1. Outer tube; 11. Tube body; 12. Hand-held seat; 121. Seat tube; 122. Handle; 2. Push rod; 3. First locking piece; 4. Second locking piece; 5. Sawtooth; 6. First mounting groove; 7. Scale line; 8. Observation window; 9. Support rod. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] Embodiment 1:

[0033] See also Figure 1-3As shown, a pushing mechanism of a minimally invasive surgical instrument is shown, 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, it is used for pushing a tissue recovery bag. Two deformable support rods 9 are provided at the end of the pushing rod 2, and the two support rods 9 are bent and the bending directions of the two are opposite. The two support rods 9 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.

[0034] The push rod 2 is provided with a plurality of locking positions at intervals along its axial direction, each locking position is provided with a first locking piece 3, and a second locking piece 4 is provided in the outer tube 1. The second locking piece 4 can be locked on one of the first locking pieces 3 during the sliding process of the push rod 2.

[0035] In this way, the push rod 2 and the outer tube 1 can achieve axial relative locking with the cooperation of the first locking piece 3 and the second locking piece 4, so that the doctor no longer needs to continuously control the position and state of the push rod 2 during the operation, thereby improving the quality and efficiency of the operation; at the same time, it also avoids the doctor's misoperation of the push rod 2 during the operation and causing damage to the patient's body.

[0036] Specifically, the doctor determines the extension length of the push rod 2 according to the size of the wound and the surgical position in the patient's body, and then locks the second locking member 4 on the first locking member 3 at the corresponding locking position.

[0037] In this embodiment, combined with Figure 2 As shown, the outer tube 1 includes a tube body 11, a hollow hand-held seat 12 connected to one end of the tube body 11, the hand-held seat 12 includes a seat tube 121 connected to the tube body 11, two handles 122 respectively arranged on both sides of the seat tube 121, and the second locking member 4 is arranged in the seat tube 121. During surgery, the doctor can hold the outer tube 1 through the hand-held seat 12, which is convenient for the doctor to operate the push rod 2.

[0038] In this embodiment, combined with Figure 2 As shown, a plurality of saw teeth 5 are arranged at intervals along the axial direction of the push rod 2, and a locking groove is formed between two adjacent saw teeth 5. The locking groove is the first locking member 3. The second locking member 4 is a deformable spring sheet arranged on the inner wall of the outer tube 1, and the spring sheet is embedded in one of the locking grooves.

[0039] When in use, the spring piece can be engaged with the locking groove through its own elastic force, and can also be easily detached from the locking groove when the doctor applies external force. The operation is convenient and the locking effect is good. Moreover, the locking groove formed by two adjacent serrations 5 is V-shaped, and the V-shaped locking groove will not interfere with the detachment of the spring piece, which is convenient for the doctor to adjust the position of the push rod 2.

[0040] In this embodiment, a first mounting groove 6 is formed on the inner wall of the outer tube 1, and the spring piece is V-shaped. The two ends of the spring piece are respectively abutted against the two end groove walls of the first mounting groove 6, and the bottom of the spring piece is embedded in one of the locking grooves.

[0041] In this embodiment, combined with Figure 3 As shown, a scale line 7 is arranged on the push rod 2 along its axial direction, and the multiple scales constituting the scale line 7 correspond to the multiple locking grooves. The scale line 7 facilitates the doctor to determine the extension length of the push rod 2 to avoid the push rod 2 extending too long and causing damage to the patient's body. Among them, the scale line 7 and the locking groove are respectively located on both sides of the push rod 2 in the radial direction.

[0042] A transparent observation window 8 is also provided on the outer tube 1, and the projection of the observation window 8 on the push rod 2 coincides with the scale line 7. The doctor can observe the scale line 7 through the observation window 8 during the operation, so as to accurately control the extension length of the push rod 2.

[0043] Embodiment 2:

[0044] Although not shown in the figure, in this embodiment, the only difference from Embodiment 1 is that the second locking member 4 includes a locking rod movable along the radial direction of the push rod 2 and arranged in the outer tube 1, one end of the locking rod is embedded in one of the locking grooves, and a spring is coaxially arranged at the other end, and the end of the spring away from the locking rod is connected to the inner wall of the outer tube 1.

[0045] The locking rod can be engaged with the locking groove under the elastic force of the spring, and can also be easily disengaged from the locking groove when the doctor applies external force. The operation is convenient and the locking effect is good.

[0046] A second mounting groove is provided on the inner wall of the outer tube 1, and the spring is accommodated in the second mounting groove.

[0047] 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. A 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: The push rod (2) is provided with a plurality of locking positions spaced apart along its axial direction, each locking position is provided with a first locking member (3), and a second locking member (4) is provided in the outer tube (1), and the second locking member (4) can be locked on one of the first locking members (3) during the sliding process of the push rod (2).

2. A pushing mechanism for a minimally invasive surgical instrument according to claim 1, characterized in that: The outer tube (1) comprises a tube body (11), a hollow hand-held seat (12) connected to one end of the tube body (11), and the second locking member (4) is arranged in the hand-held seat (12).

3. A pushing mechanism for a minimally invasive surgical instrument according to claim 1 or 2, characterized in that: The first locking member (3) is a locking groove provided on the locking position, and the second locking member (4) is movably arranged and can be embedded in the locking groove or detached from the locking groove.

4. A pushing mechanism for a minimally invasive surgical instrument according to claim 3, characterized in that: The push rod (2) is provided with a plurality of saw teeth (5) at intervals along its axial direction, and the locking groove is formed between two adjacent saw teeth (5).

5. The pushing mechanism of a minimally invasive surgical instrument according to claim 3, characterized in that: The second locking member (4) is a deformable spring sheet arranged on the inner wall of the outer tube (1), and the spring sheet is embedded in one of the locking grooves.

6. The pushing mechanism of a minimally invasive surgical instrument according to claim 5, characterized in that: A first mounting groove (6) is provided on the inner wall of the outer tube (1), the spring piece is V-shaped, the two ends of the spring piece are respectively abutted against the two end groove walls of the first mounting groove (6), and the bottom of the spring piece is embedded in one of the locking grooves.

7. The pushing mechanism of a minimally invasive surgical instrument according to claim 3, characterized in that: The second locking member (4) comprises a locking rod which is movable in the radial direction of the push rod (2) and is arranged in the outer tube (1); one end of the locking rod is embedded in one of the locking grooves; a spring is coaxially arranged at the other end; and one end of the spring away from the locking rod is connected to the inner wall of the outer tube (1).

8. The pushing mechanism of a minimally invasive surgical instrument according to claim 7, characterized in that: A second installation groove is provided on the inner wall of the outer tube (1), and the spring is accommodated in the second installation groove.

9. The pushing mechanism of a minimally invasive surgical instrument according to claim 3, characterized in that: The push rod (2) is provided with a scale line (7) along its axial direction, and a plurality of scales constituting the scale line (7) correspond to a plurality of locking grooves.

10. The pushing mechanism of a minimally invasive surgical instrument according to claim 9, characterized in that: The outer tube (1) is also provided with an observation window (8), and the projection of the observation window (8) on the pushing rod (2) coincides with the scale line (7).

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