Electric rotary biopsy forceps

Abstract

The pair of electric rotary biopsy forceps comprises a forceps ring, a core rod, a pull rod and a rotatable forceps head, a control mechanism is arranged in the core rod, and the control mechanism comprises a motor, a fixed cylinder and a control rod; the motor is installed in the core rod and can be driven by the clamp ring to move to a limiting position in the axial direction. The fixed cylinder is installed at the driving end of the motor, a limiting groove is formed in the rear end in the fixed cylinder, and a stop block is arranged at the front end in the fixed cylinder; the control rod is rotatably arranged in the fixing cylinder, a limiting block capable of being inserted into the limiting groove is arranged at the rear end of the control rod, and the front end of the control rod is connected with the inner side of the pull rod and can drive the pull rod to move axially. The fixing cylinder is driven by the motor to rotate, the forceps head can rotate by 360 degrees according to the position where tissue is convenient to cut through relative position movement of the fixing cylinder and the control rod, and control operation of opening and closing of the forceps head can be achieved. And rotation and opening and closing of the tong head are controlled by a motor, so that the sampling efficiency and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an electric rotary biopsy forceps. Background Art

[0002] At present, when biopsy forceps are used in conjunction with endoscopy for in vivo examination and treatment, the intestinal and upper digestive tract structures are complex, and the location and morphology of the diseased tissues are variable. The fixed position and direction of the jaws of ordinary biopsy forceps bring inconvenience to surgical operations and certain difficulties for doctors to smoothly take samples. In addition, when the forceps head rotates, the outer sheath also rotates synchronously. When in use, the outer sheath is placed in the endoscope forceps channel. The rotation of the outer tube can easily cause scratches and wear on the endoscope forceps channel.

[0003] A Chinese patent CN218852744U biopsy forceps that can rotate 360 ​​degrees, through the forceps ring, forceps handle, rotating spring tube, A rotating tube, B rotating tube in the forceps head assembly and the control assembly, realizes the 360-degree rotation, closing and clamping action of the biopsy forceps, and the outer sheath located in the endoscope forceps channel is in a fixed state, thereby effectively preventing the outer sheath from abrading the endoscope forceps channel. The biopsy forceps can cope with different forms of tissues by adjusting the angle, and realize free grasping to obtain larger suspicious lesion tissues. However, after controlling the forceps head assembly to rotate to the required angle, it is necessary to use the hand to keep the forceps ring from rotating, and when operating the opening and closing of the forceps head, it is necessary to move the forceps ring axially, so that the forceps ring may rotate at an angle, resulting in changes in the angle accuracy of the biopsy forceps, affecting the efficiency and accuracy of sampling. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes an electric rotary biopsy forceps, and the specific technical solution is as follows:

[0005] An electric rotary biopsy forceps comprises a forceps ring, a core rod, a pull rod and a rotatable forceps head, wherein the forceps ring is movably sleeved on the core rod, the pull rod is arranged in the core rod, and the front end of the pull rod is connected to the forceps head, and a control mechanism for controlling the rotation and axial movement of the pull rod is arranged in the core rod, and the control mechanism comprises:

[0006] The motor is installed in the core rod and can be driven by the clamp ring to move axially to a limited position;

[0007] A fixed cylinder is installed at the driving end of the motor, a limiting groove is provided at the rear end of the fixed cylinder, and a stopper is provided at the front end of the fixed cylinder; and

[0008] The control rod is rotatably arranged in the fixed cylinder, the rear end of the control rod is provided with a limit block which can be inserted into the limit groove, the front end of the control rod is connected to the inner side of the pull rod, and can drive the pull rod to move axially;

[0009] Among them, the rear end of the pull rod is provided with a fixed disk located in the fixed cylinder, and the fixed disk is provided with a blocking groove matching the block; when the motor is in the initial position, the block is located in the blocking groove, and the limit block is located outside the limit groove; when the motor moves to the limited position, the limit block is located in the limit groove, and the block moves out of the blocking groove.

[0010] Furthermore, the front end of the control rod is configured as a lead screw, and the inner wall of the front end of the pull rod is connected to the lead screw via a lead screw pair.

[0011] Furthermore, a groove body matching the motor and the fixing tube is provided in the core rod, and a ring groove into which the stopper can be moved is provided at the front end of the groove body.

[0012] Furthermore, a blocking mechanism for hindering the movement of the motor is provided in the core rod at both the initial position and the limited position of the motor.

[0013] Furthermore, the blocking mechanism comprises a blocking block and a torsion spring, and two sides of the blocking block are installed in the core rod through the torsion spring, and the elastic force of the torsion spring enables the blocking block to return to a vertical state.

[0014] Furthermore, a pair of push rods connected to the motor housing are arranged in the clamp ring, and a push groove for axial movement of the push rods is opened on the core rod.

[0015] Furthermore, the outer surfaces of the core rods at both ends of the pliers ring are provided with limit rings for limiting the axial movement distance of the pliers ring.

[0016] Furthermore, control buttons for controlling the start, stop and reset of the motor are respectively provided on the clamp ring.

[0017] Furthermore, a spring tube is provided at the front end of the core rod, the pliers head is connected to the front end of the spring tube via a rotatable rotating shaft, and the pull rod passes through the spring tube and the rotating shaft and is connected to the pliers head.

[0018] Beneficial effects:

[0019] The utility model utilizes a motor to drive the fixed cylinder to rotate, and through the relative position movement of the fixed cylinder and the control rod, the forceps head can be rotated 360 degrees according to the position convenient for shearing tissue, and the opening and closing control operation of the forceps head can also be realized; the rotation and opening and closing control of the forceps head are both controlled by the motor, and only simple manipulation on the forceps ring is required, which is easy to operate, and the angle rotation accuracy of the biopsy forceps is high, thereby improving the sampling efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the utility model.

[0021] Figure 2It is a schematic diagram of a cross section of the core rod of the utility model.

[0022] Figure 3 It is a cross-sectional view and a partial enlarged view of the motor of the utility model in the initial position.

[0023] Figure 4 It is a cross-sectional view and a partial enlarged view of the motor of the utility model in a limited position.

[0024] Figure 5 For this utility model Figure 3 Enlarged schematic diagram of the blocking mechanism at A in the middle.

[0025] In the figure: 1 core rod, 11 groove body, 12 ring groove, 13 limit ring, 14 holding ring; 2 clamp ring, 21 push rod; 3 spring tube, 31 rotating shaft; 4 pull rod, 41 fixed plate, 42 screw pair; 5 clamp head; 6 control mechanism, 61 motor, 62 fixed cylinder, 621 limit groove, 622 block, 63 control rod, 631 limit block, 632 screw; 7 blocking mechanism, 71 blocking block, 72 torsion spring; 8 control button. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] like Figures 1 to 5As shown, an electric rotary biopsy forceps comprises a forceps ring 2, a core rod 1, a pull rod 4 and a rotatable forceps head 5, wherein the forceps ring 2 is movably sleeved on the core rod 1, the pull rod 4 is arranged in the core rod 1, and the front end of the pull rod 4 is connected to the forceps head 5; a spring tube 3 is arranged at the front end of the core rod 1, the forceps head 5 is connected to the front end of the spring tube 3 through a rotatable rotating shaft 31, and the pull rod 4 is connected to the forceps head 5 after passing through the spring tube 3 and the rotating shaft 31; a holding ring 14 is arranged at the rear end of the core rod 1 to facilitate the operator to hold and operate.

[0030] The pliers ring 2 and the core rod 1 can be connected via a sliding pair so that the pliers ring 2 can move axially along the core rod 1, and the sliding pair can be used to limit the rotation of the pliers ring 2 on the core rod 1; illustratively, a sliding bar can be symmetrically arranged on the inner side of the pliers ring 2, and a sliding groove matching the sliding bar can be provided on the surface of the core rod 1 so that the sliding bar can slide in the sliding groove.

[0031] like Figures 2 to 4 As shown, a control mechanism 6 for controlling the rotation and axial movement of the pull rod 4 is provided in the core rod 1; when the pull rod 4 rotates, the pliers head 5 can be driven to rotate to adjust the shearing angle of the pliers head 5; when the pull rod 4 moves axially, the pliers head 5 can be opened and closed to operate the pliers head 5 to shear the diseased tissue.

[0032] The control mechanism 6 includes a motor 61, a fixing cylinder 62 and a control rod 63; specifically:

[0033] The motor 61 is installed in the core rod 1 and can be driven by the clamp ring 2 to move axially to a limited position;

[0034] The fixing cylinder 62 is installed at the driving end of the motor 61 (located at Figure 2 The left side of the fixed cylinder 62 has a limit groove 621 at the rear end thereof, and a stopper 622 at the front end thereof;

[0035] The control rod 63 is rotatably disposed in the fixed tube 62, and a limit block 631 which can be inserted into the limit groove 621 is disposed at the rear end of the control rod 63. The front end of the control rod 63 is connected to the inner side of the pull rod 4 and can drive the pull rod 4 to move axially.

[0036] The rear end of the pull rod 4 is provided with a fixed disk 41 located in the fixed cylinder 62, and a stop groove matching the stop block 622 is provided on the fixed disk 41. When the motor 61 is in the initial position, the stop block 622 is located in the stop groove, and the limit block 631 is located outside the limit groove 621. At this time, when the motor 61 rotates, the stop block 622 on the fixed cylinder 62 drives the fixed disk 41 to rotate, thereby realizing the rotation of the pull rod 4; when the motor 61 moves to the limited position, the limit block 631 is located in the limit groove 621, and the stop block 622 moves out of the stop groove. At this time, when the motor 61 rotates, the fixed cylinder 62 drives the control rod 63 to rotate, thereby using the control rod 63 to drive the pull rod 4 to move axially.

[0037] like Figure 2 , 3 As shown, the front end of the control rod 63 is configured as a screw 632, and the inner wall of the front end of the pull rod 4 is connected to the screw 632 through a screw pair 42; therefore, when the fixed tube 62 drives the control rod 63 to rotate, the screw pair 42 moves axially at the front end of the control rod 63, and the screw pair drives the pull rod 4 to achieve axial movement, so that the pull rod 4 can control the opening and closing of the pliers head 5.

[0038] In one embodiment, a groove body 11 matching the motor 61 and the fixed cylinder 62 is opened in the core rod 1, and the front end of the groove body 11 is connected to a ring groove 12 for the stop block 622 to move into; when the motor 61 moves to a limited position, the stop block 622 moves out of the stop groove and moves into the ring groove 12, so that the fixed disk 41 is not blocked by the stop block 622, and when the fixed cylinder 62 rotates, the stop block 622 can rotate in the ring groove 12.

[0039] In one embodiment, a blocking mechanism 7 for preventing the movement of the motor 61 is disposed in the core rod 1 at both the initial position and the limited position, so that the motor 61 will not move easily.

[0040] like Figure 5 As shown, the blocking mechanism 7 includes a blocking block 71 and a torsion spring 72. Both sides of the blocking block 71 are installed in the core rod 1 through the torsion spring 72. The elastic force of the torsion spring 72 enables the blocking block 71 to return to a vertical state.

[0041] Specifically, when the blocking block 71 is in a vertical state, it is in a state of hindering the movement of the motor 61; pushing the motor 61 can cause the blocking block 71 to rotate to a compression state flush with the inner surface of the slot body 11, and the motor 61 can move and compress the blocking block 71 at this time; after the blocking block 71 is released from compression, it rotates to a vertical state through the action of the torsion spring 72.

[0042] Among them, when the motor 61 is in the initial position, the blocking block 71 at the front end is in an obstructing state, and the blocking block 71 at the rear end is in a compressing state; when the motor 61 is in the limited position, the blocking block 71 at the rear end is in an obstructing state, and the blocking block 71 at the front end is in a compressing state.

[0043] like Figure 2 , 3 As shown, a pair of push rods 21 connected to the housing of the motor 61 are arranged in the pliers ring 2, and a push groove for axial movement of the push rods 21 is provided on the core rod 1. When the pliers ring 2 is pushed to move, the push rods 21 move in the push grooves, thereby driving the axial movement of the motor 61 by the push rods 21.

[0044] In one embodiment, the outer surfaces of the core rod 1 at both ends of the pliers ring 2 are provided with limit rings 13 for limiting the axial movement distance of the pliers ring 2; the axial distance that the motor 61 can move is consistent with the axial distance that the pliers ring 2 can move on the surface of the core rod 1, so that the motor 61 can be controlled by the pliers ring 2 to be in the initial position and the limited position respectively.

[0045] In another embodiment, the pliers ring 2 is provided with control buttons 8 for controlling the start, stop and reset of the motor 61. When the motor 61 is in a limited position, the control rod 63 drives the pull rod 4 to move axially toward the rear end, and the pliers head 5 completes the shearing operation; after pressing the reset control button 8, the motor 61 rotates in the opposite direction, so that the control rod 63 drives the pull rod 4 to move axially toward the front end, and the pliers head 5 returns to the open state; at this time, the stopper 622 can be opposite to the stopper groove, and when the motor 61 is moved axially to the rear end to the initial position, the stopper 622 can enter the stopper groove.

[0046] It should be noted that the control button 8 for starting and stopping the motor 61 can be installed in a position that is convenient for operation with fingers, especially the index finger; wherein the control button 8 for starting and stopping the motor 61 can be implemented in a manner of long pressing to start and stopping after releasing, and the motor 61 is rotated at a limited angle according to the stroke of the pull rod 4 (the distance required to control the opening and closing of the pliers head 5) (the motor 61 can rotate at an angle of not less than 360° to ensure that the pliers head 5 can be adjusted to various angles).

[0047] When in use, the operator places the thumb in the holding ring 14, clamps the forceps ring 2 with the index finger and the middle finger, and sends the forceps head 5 to the suspected lesion through the forceps channel of the endoscope, and aligns the forceps head 5 with the suspected lesion tissue; starts the motor 61 by pressing the control button 8, so that the forceps head 5 is rotated to an angle suitable for shearing tissue; then uses three fingers to cooperate to exert force outward, so that the forceps ring 2 moves toward the front end, pushing the motor 61 to move to a limited position; presses the control button 8 again to start the motor 61, and controls the pull rod 4 to move axially toward the rear end, thereby achieving shearing of the tissue; after removing the biopsy forceps from the endoscope, presses the reset control button 8, the motor 61 reverses and drives the control rod 63 to move axially toward the front end, so that the forceps head 5 releases the occluded tissue, and the control rod 63 returns to the initial position; pushes the forceps ring 2 to move it toward the rear end, and the motor 61 block 622 enters the retaining groove, and presses the reset button again, so that the angle of the forceps head 5 also returns to the initial position.

[0048] It should be noted that the “front end” described in this application refers to the position closer to the clamp head 5 (i.e. Figure 1 The "rear end" refers to the position closer to the holding ring 14 (i.e. Figure 1 middle).

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric rotary biopsy forceps, comprising a forceps ring, a core rod, a pull rod and a rotatable forceps head, wherein the forceps ring is movably sleeved on the core rod, the pull rod is arranged in the core rod, and the front end of the pull rod is connected to the forceps head, characterized in that: A control mechanism for controlling the rotation and axial movement of the pull rod is arranged inside the core rod, and the control mechanism comprises: The motor is installed in the core rod and can be driven by the clamp ring to move axially to a limited position; A fixed cylinder is installed at the driving end of the motor, a limiting groove is provided at the rear end of the fixed cylinder, and a stopper is provided at the front end of the fixed cylinder; and The control rod is rotatably arranged in the fixed cylinder, the rear end of the control rod is provided with a limit block which can be inserted into the limit groove, the front end of the control rod is connected to the inner side of the pull rod, and can drive the pull rod to move axially; Among them, the rear end of the pull rod is provided with a fixed disk located in the fixed cylinder, and the fixed disk is provided with a blocking groove matching the block; when the motor is in the initial position, the block is located in the blocking groove, and the limit block is located outside the limit groove; when the motor moves to the limited position, the limit block is located in the limit groove, and the block moves out of the blocking groove.

2. The electric rotary biopsy forceps according to claim 1, characterized in that: The front end of the control rod is arranged as a lead screw, and the inner wall of the front end of the pull rod is connected to the lead screw through a lead screw pair.

3. The electric rotary biopsy forceps according to claim 1, characterized in that: A slot body matching the motor and the fixing cylinder is provided in the core rod, and a ring groove for the stopper to move into is provided in the front end of the slot body.

4. The electric rotary biopsy forceps according to claim 3, characterized in that: The core rod is provided with a blocking mechanism for hindering the movement of the motor at both the initial position and the limited position.

5. The electric rotary biopsy forceps according to claim 4, characterized in that: The blocking mechanism comprises a blocking block and a torsion spring. Both sides of the blocking block are installed in the core rod through the torsion spring. The elastic force of the torsion spring enables the blocking block to return to a vertical state.

6. The electric rotary biopsy forceps according to claim 5, characterized in that: A pair of push rods connected to the motor housing are arranged in the clamp ring, and a push groove for axial movement of the push rods is opened on the core rod.

7. The electric rotary biopsy forceps according to any one of claims 3 to 6, characterized in that: The outer surfaces of the core rods at both ends of the clamp ring are both provided with limiting rings for limiting the axial movement distance of the clamp ring.

8. The electric rotary biopsy forceps according to claim 1, characterized in that: The clamp rings are respectively provided with control buttons for controlling the start, stop and reset of the motor.

9. The electric rotary biopsy forceps according to claim 1, characterized in that: A spring tube is arranged at the front end of the core rod, the pliers head is connected to the front end of the spring tube via a rotatable rotating shaft, and the pull rod is connected to the pliers head after passing through the spring tube and the rotating shaft.

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