Soft single-action pointed scissors for hysteroscope

Abstract

The utility model discloses a pair of flexible single-acting pointed scissors for a hysteroscope, which relates to the field of medical instruments and comprises a scissor head, a fixed scissor head arranged at the front end of the scissor head and a movable scissor head hinged with the fixed scissor head. The movable handle is rotationally connected with the fixed handle, and a through hole is formed in the upper part of the fixed handle; the front end of the hose is sleeved with the scissor head, the rear end of the hose is sleeved with the screen cap, an inner pull rod penetrates through the hose, the head of the inner pull rod is in transmission connection with the movable scissor head, and the tail of the inner pull rod extends out of the hose and penetrates into the through hole to be fixedly connected with the spring pressing rod; one end of the spring pressing rod is fixed on the movable handle, the other end of the spring pressing rod penetrates into the through hole, and the movable handle drives the spring pressing rod to axially slide along the through hole; and the screen cap sleeves the outer wall of the through hole, and the tail end of the hose extends into the screen cap after being sleeved with a stress application spring. According to the hysteroscope surgical scissors, tissue can be sheared in hysteroscope surgical operation, a suture line can be sheared during suturing, after the stress application spring is sleeved on the hose, the shearing force is stronger, and the problem that the hose is easy to break when being bent is avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a pair of hysteroscopic soft single-action pointed scissors. Background Art

[0002] Hysteroscopic operating instruments can complete various operations under the guidance of the hysteroscope. The more commonly used clinical hysteroscope is the inspection hysteroscope, which has a diameter of 6mm and can be inserted with mechanical micro-scissors or grasping forceps to perform intrauterine operations, such as polypectomy, mediastinectomy, suturing, etc. The existing hysteroscopic soft scissors are miniature and small in size. When the handle is closed and sheared, it is easy to cause over-cutting, so that the scissor head cannot close automatically and scratch the tissue. Due to the small organs, the hysteroscopic soft scissors used in surgery are even smaller. The flexible tube is bent and sheared at will during the operation, which is easy to cause the flexible tube to break in the human body and other parts of the body. Trauma, prolonged operation time, can not meet the ideal operation effect, and the shearing force is not enough and it is more laborious. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and to provide a hysteroscopic soft single-action pointed scissors, which can shear tissues during hysteroscopic surgery and can shear sutures during suturing. After adding a force spring to the hose, the shearing force is stronger and the problem of the hose being easily broken when bent is avoided.

[0004] The purpose of the utility model is achieved through the following technical solutions: the hysteroscopic soft single-action pointed scissors include:

[0005] The scissor head comprises a fixed cutter head arranged at the front end thereof and a movable cutter head hinged to the fixed cutter head;

[0006] The movable handle is rotatably connected to the fixed handle, and a through hole is provided on the upper part of the fixed handle;

[0007] The front end of the hose is inserted into the scissor head, and the rear end is inserted into the screen cap. An inner pull rod is inserted into the hose. The head of the inner pull rod is connected with the movable cutter head for transmission. The tail of the inner pull rod extends out of the hose and passes through the through hole to be fixedly connected with the spring pressure rod.

[0008] A spring pressure rod, one end of which is fixed on the movable handle, and the other end of which is inserted into the through hole, and the spring pressure rod is driven by the movable handle to slide axially along the through hole; and

[0009] The screen cap is sleeved on the outer wall of the through hole, and the tail end of the hose is sleeved with a force adding spring and then extends into the screen cap.

[0010] As a further technical solution, a compression sleeve is also installed in the screen cap, and the compression sleeve is arranged at the matching position of the hose and the force spring.

[0011] As a further technical solution, the screen cap is threadedly connected to the outer wall of the through hole, so that the pressing sleeve cooperates with the screen cap to press the force spring and the hose tightly.

[0012] As a further technical solution, a ball head is provided at one end of the spring pressure rod close to the movable handle for fitting into a slot provided on the upper portion of the movable handle.

[0013] As a further technical solution, a closing spring is sleeved on the outer periphery of the spring pressure rod, one end of the closing spring abuts against the step on the inner wall of the through hole, and the other end of the closing spring abuts against the movable handle.

[0014] As a further technical solution, a limit block is provided at the joint between the scissor head and the movable cutter head, and a limit slot is provided on the movable cutter head at a position corresponding to the limit block, so as to limit the rotation angle of the movable cutter head.

[0015] The beneficial effects of the utility model are:

[0016] 1. A force spring is installed at the assembly point of the hose and the fixed handle (screen cap), which makes the hose have a certain strength and is not easy to bend or break, thus extending the service life of the instrument;

[0017] 2. Use the screen cap and the compression sleeve to press the force spring against the hose to prevent the hose from slipping during use;

[0018] 3. During shearing, the movable handle applies shearing force through the closed spring, which makes the shearing force stronger and reduces the difficulty of surgical operation;

[0019] 4. The spring pressure rod and the movable handle are flexibly assembled through the ball head, making it more convenient to use and disassemble;

[0020] 5. A limit block is set on the fixed blade head (scissor head) to limit the rotation angle of the moving blade head to avoid over-cutting of the moving blade head, thus forming effective protection for the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0022] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0023] Figure 3 It is a structural schematic diagram of the utility model when the movable cutter head is closed relative to the fixed cutter head.

[0024] Figure 4 It is a structural schematic diagram of the utility model when the movable cutter head is opened relative to the fixed cutter head.

[0025] Explanation of the accompanying drawings: scissors head 1, fixed blade head 11, movable blade head 12, limiting slot 121, limiting block 13, hose 2, head 21, inner pull rod 22, tail 23, force spring 3, screen cap 4, pressing sleeve 41, closing spring 5, spring pressure rod 51, ball head 52, movable handle 6, slot 61, fixed handle 7, through hole 71, step 72, connecting pin 8. DETAILED DESCRIPTION

[0026] The utility model will be described in detail below with reference to the accompanying drawings:

[0027] Example: As attached Figures 1 to 4 As shown, the hysteroscopic soft single-action pointed scissors include a scissor head 1, a fixed blade head 11, a movable blade head 12, a limit slot 121, a limit block 13, a hose 2, a head 21, an inner pull rod 22, a tail 23, a force spring 3, a screen cap 4, a pressing sleeve 41, a closing spring 5, a spring pressure rod 51, a ball head 52, a movable handle 6, a slot 61, a fixed handle 7, a through hole 71, a step 72 and a connecting pin 8.

[0028] Reference Figure 3 , 4 A fixed blade head 11 is arranged at the front end of the scissor head 1, and a movable blade head 12 is riveted to the fixed blade head 11 by a pin, so that the movable blade head 12 can be opened and closed relative to the fixed blade head 11. Preferably, a limit block 13 is arranged at the matching position of the scissor head 1 and the movable blade head 12, and a limit slot 121 is provided on the movable blade head 12 at a position corresponding to the limit block 13. Figure 3 As shown, when the movable cutter head 12 is closed relative to the fixed cutter head 11, the limit block 13 is just inserted into the limit slot 121, thereby limiting the angle of further rotation of the movable cutter head 12, avoiding over-shearing of the movable cutter head, and effectively protecting the instrument.

[0029] like Figure 1 , 2As shown, the movable handle 6 is rotatably connected with the fixed handle 7 through the connecting pin 8, and a through hole 71 is provided at the upper part of the fixed handle 7 along the axial direction of the hose 2. The front end of the hose 2 is inserted into the scissor head 1, and the rear end of the hose 2 is inserted into the screen cap 4, and an inner pull rod 22 is inserted into the hose 2. The head 21 of the inner pull rod 22 is connected with the movable cutter head 12 through a pin to realize transmission; the tail 23 of the inner pull rod 22 extends out of the hose 2 and is inserted into the through hole 71 and fixedly connected with the spring pressure rod 51 (interference fit). Further, a ball head 52 is provided at one end of the spring pressure rod 51 close to the movable handle 6, and the ball head 52 is used to fit into the card slot 61 provided at the upper part of the movable handle 6, so that the spring pressure rod 51 is fixedly connected with the movable handle 6. A closing spring 5 is provided on the outer periphery of the spring pressure rod 51, and one end of the closing spring 5 is against the step 72 on the inner wall of the through hole 71, and the other end of the closing spring 5 is against the movable handle 6 (the mouth of the card slot 61). When the movable handle 6 rotates relative to the fixed handle 7, the movable handle 6 simultaneously drives the spring pressure rod 51 to slide axially along the through hole 71, and the inner pull rod 22 then moves telescopically.

[0030] Preferably, the screen cap 4 is sleeved on the outer wall of the through hole 71, and the screen cap 4 is threadedly connected to the outer wall of the through hole 71, and the tail end of the hose 2 is sleeved with the force spring 3 and then extends into the screen cap 4. A pressing sleeve 41 is also installed in the screen cap 4, and the pressing sleeve 41 is sleeved on the matching position of the hose 2 and the force spring 3, so that the pressing sleeve 41 cooperates with the screen cap 4 to press the force spring 3 and the hose 2 tightly. When the screen cap 4 is locked, the pressing sleeve 41 is pressed between the inner wall of the screen cap 4 and the end face of the through hole 71. Since the hose 2 contacts the screen cap 4 through the force spring 3 and the pressing sleeve 41, rather than directly contacting the screen cap 4, the hose 2 has a certain strength at the assembly connection, is not easy to bend and break, and effectively extends the service life of the device.

[0031] The working process of the utility model is as follows: during surgery, the operator controls the movable handle 6 to rotate relative to the fixed handle 7, and the movable handle 6 simultaneously drives the spring pressure rod 51 to slide along the axial direction of the through hole 71. Since the inner pull rod 22 and the spring pressure rod 51 are in interference fit, the inner pull rod 22 then telescopes, and the inner pull rod 22 drives the movable cutter head 12 through the head 21, so that the movable cutter head 12 opens and closes relative to the fixed cutter head 11. When the movable cutter head 12 is closed relative to the fixed cutter head 11, the limit block 13 is just inserted into the limit slot 121, thereby limiting the angle at which the movable cutter head 12 continues to rotate, avoiding over-shearing of the movable cutter head, and effectively protecting the instrument.

[0032] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.

Claims

1. A hysteroscopic soft single-action pointed scissors, characterized in that: include: A scissor head (1) comprises a fixed cutter head (11) arranged at the front end thereof and a movable cutter head (12) hingedly connected to the fixed cutter head (11); The movable handle (6) is rotatably connected to the fixed handle (7), and a through hole (71) is provided on the upper part of the fixed handle (7); The hose (2) has its front end inserted into the scissor head (1) and its rear end inserted into the screen cap (4). An inner pull rod (22) is arranged in the hose (2). The head (21) of the inner pull rod (22) is connected to the movable cutter head (12) for transmission. The tail (23) of the inner pull rod (22) extends out of the hose (2) and is inserted into the through hole (71) to be fixedly connected with the spring pressure rod (51). A spring pressure rod (51), one end of which is fixed on the movable handle (6), and the other end of which penetrates into the through hole (71), and the spring pressure rod (51) is driven by the movable handle (6) to slide axially along the through hole (71); as well as The screen cap (4) is sleeved on the outer wall of the through hole (71), and the tail end of the hose (2) is sleeved with a force spring (3) and then extends into the screen cap (4).

2. The hysteroscopic soft single-action pointed scissors according to claim 1, characterized in that: A pressing sleeve (41) is also arranged in the screen cap (4), and the pressing sleeve (41) is sleeved on the matching position of the hose (2) and the force spring (3).

3. The hysteroscopic soft single-action pointed scissors according to claim 2, characterized in that: The screen cap (4) is threadedly connected to the outer wall of the through hole (71), so that the pressing sleeve (41) cooperates with the screen cap (4) to press the force spring (3) and the hose (2) tightly.

4. The hysteroscopic soft single-action pointed scissors according to claim 1, characterized in that: A ball head (52) is provided at one end of the spring pressure rod (51) close to the movable handle (6) for fitting into a clamping groove (61) provided on the upper part of the movable handle (6).

5. The hysteroscopic soft single-action pointed scissors according to claim 1, characterized in that: A closing spring (5) is sleeved on the outer periphery of the spring pressure rod (51), one end of the closing spring (5) abuts against a step (72) on the inner wall of the through hole (71), and the other end of the closing spring (5) abuts against the movable handle (6).

6. The hysteroscopic soft single-action pointed scissors according to claim 1, characterized in that: A limit block (13) is provided at the matching position of the scissor head (1) and the movable cutter head (12), and a limit slot (121) is provided on the movable cutter head (12) at a position corresponding to the limit block (13) for limiting the rotation angle of the movable cutter head (12).

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