Adjustable anus dilatation device for anorectal anastomat

Abstract

The invention relates to the technical field of medical instruments, and discloses an adjustable anus dilatation device for an anorectal anastomat, the adjustable anus dilatation device for the anorectal anastomat comprises two connecting seats, a plurality of dilatation plates are annularly arranged between the two connecting seats at equal intervals, a movable rod is rotatably connected in one connecting seat, and the movable rod is rotatably connected in the other connecting seat. A fixed rod is fixedly connected to one side of the other connecting seat, the movable rod is sleeved with the fixed rod, a vibration assembly is connected into the connecting seat and connected with the expansion plate, and an adjusting mechanism is connected between one end of the fixed rod and the movable rod. According to the adjustable anal dilatation device for the anorectal anastomat, when a driving seat is rotated, a driving block and a driving rod are matched to drive dilatation plates to vibrate, meanwhile, a transmission gear is meshed with an arc-shaped rack to enable a screw to move on the driving seat, the dilatation plates are far away from one another, and therefore the dilatation plates vibrate circularly while intermittent anal dilatation is carried out on the dilatation plates; the anorectum is massaged and pre-loosened, so that the comfort and the safety of a patient are improved while the operation mode is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an adjustable anal dilator for an anorectal stapler. Background Art

[0002] Anorectal staplers are mainly used to treat anorectal diseases. The principle is to perform circular resection of the rectal mucosa through two circles of tubular titanium nails that are arranged in an interlaced manner. The length is generally about two to four centimeters, and the rectal mucosa is stapled at the same time to achieve the purpose of shortening the rectal mucosa, blocking hemorrhoidal vein blood flow, and correcting rectal protrusion.

[0003] Before using the anorectal stapler, the anal dilator sleeve must be inserted into the patient's anus so that the surgical tools can enter the anorectal cavity. Since the anal dilator sleeve has a large diameter, it cannot directly enter the anorectal cavity. Currently, the patient's anus is mainly dilated by an anal dilator. However, the anal dilator has a fixed diameter. When it is directly connected to the anorectal cavity, it will cause damage to muscle tissue such as the sphincter, affecting postoperative recovery. The patent document with the prior art publication number CN116687474A provides an adjustable rectal anastomotic anal dilator device. The document rotates a rotating component, and the rotating component drives multiple groups of support plate components to expand away from the mounting column through multiple groups of adjustment components. At this time, the size of the anal dilator can be increased.

[0004] Although the above literature has many beneficial effects, the following problems still exist: the expansion mode of the support plate is isometric movement, and during use, the doctor needs to control the knob to rotate at different speeds and intermittently, so that the anorectal area adapts to it, resulting in inconvenient operation and low comfort. Therefore, we propose an adjustable anal dilator for anorectal stapler. Summary of the invention

[0005] In view of the fact that the expansion mode of the above-mentioned existing support plate is equidistant movement, the doctor needs to control the knob to rotate at uneven speeds and intermittently during use, so that the anorectal area adapts to it, resulting in inconvenient operation and low comfort of use. Therefore, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide an adjustable anal dilator for anorectal stapler, which aims to solve the problem that the expansion method of the support plate is equidistant movement, and during use, the doctor needs to control the knob to rotate at non-uniform speeds and intermittently, so that the anorectal area can adapt to it, resulting in inconvenient operation and low comfort of use.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: an adjustable anal dilator for an anorectal stapler, comprising two connecting seats, a plurality of expansion plates are arranged in a circular shape with equal spacing between the two connecting seats, a movable rod is rotatably connected in one of the connecting seats, a fixed rod is fixedly connected to one side of the other connecting seat, the movable rod is sleeved in the fixed rod, a vibration assembly is connected in the connecting seat, the vibration assembly is connected to the expansion plate, and an adjustment mechanism is connected between one end of the fixed rod and the movable rod;

[0008] The vibration assembly includes a driving block connected to the movable rod, a plurality of sliders are arranged outside the driving block, the sliders are elastically connected to the connecting seat, and a connecting rod is hinged between the sliders and the expansion plate;

[0009] The adjustment mechanism includes a driving seat rotatably connected to the fixed rod, and two screw rods are threadedly engaged on the driving seat. One end of the screw rod is connected to the movable rod, and the other end is fixedly connected to a transmission gear. The transmission gear is meshed with an arc-shaped rack fixed on the fixed rod.

[0010] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, a guide block is fixedly connected to one side of the connecting seat connected to the movable rod.

[0011] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, wherein: a movable cavity is opened in the connecting seat, the slider is slidably connected to the movable cavity, and a first spring is connected between one side of the slider and the movable cavity, and the other side is fixedly connected to a driving rod, and the driving rod is in sliding contact with the driving block.

[0012] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, the driving block is in a ladder-shaped structure, and the driving block is slidably connected to the movable rod.

[0013] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, an adjusting rod is rotatably connected inside the movable rod, an external thread is fixed on the adjusting rod, a screw sleeve is threadedly connected to the external thread, and the screw sleeve is fixedly connected to the driving block.

[0014] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, there are two arc-shaped racks, which are symmetrically arranged on the fixing rod.

[0015] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, the adjustment mechanism also includes a driving ring, which is slidably connected to the movable rod, and one side of the driving ring is fixedly connected to a limiting cylinder, and one end of the screw is plugged into and matched with the limiting cylinder.

[0016] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, the adjustment mechanism further includes a limiting ring, which is sleeved on the fixed rod and rotatably connected to one end of the screw rod.

[0017] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, wherein: a through hole larger than the diameter of the screw is opened on the driving seat, and a limiting block is slidably connected inside the driving seat, a threaded groove matching the screw is opened on one side of the limiting block, and a second spring is elastically connected to the driving seat on the other side, and a pressing block is fixedly connected to the limiting block, and one end of the pressing block is arranged on the outside of the driving seat.

[0018] As a preferred solution of the adjustable anal dilator for anorectal stapler described in the present invention, a third spring is sleeved on the screw rod, one end of the third spring is fixedly connected to the drive seat, and the other end is fixedly connected to a connecting ring, and the connecting ring is rotatably connected to the screw rod.

[0019] Beneficial effects of the present invention:

[0020] 1. When the drive seat is rotated, the screw drives the movable rod to rotate, so that the drive block and the drive rod cooperate to drive the expansion plate to vibrate, and at the same time the transmission gear and the arc-shaped rack are engaged to move the screw on the drive seat, thereby driving the movable rod to move, so that the expansion plates are separated from each other, thereby realizing that the expansion plates vibrate cyclically while performing intermittent anal dilation, massaging and pre-loosening the anus and rectum, simplifying the operation method and improving the comfort and safety of the patient.

[0021] 2. The present invention makes each expansion plate vibrate in a cyclic manner in sequence, thereby avoiding damage to the anus and rectum caused by expansion when all expansion plates vibrate simultaneously. At the same time, the position of the driving block can be adjusted by rotating the adjusting rod, thereby changing the displacement amplitude of the driving block on the driving rod, and then adjusting the vibration amplitude of the expansion plate, thereby improving the applicable scenarios.

[0022] 3. The present invention can cancel the contact between the limit block and the screw rod by pressing the pressing block. At this time, the movable rod can be driven to move in the opposite direction by resetting the third spring, so that the expansion plate can be quickly retracted, avoiding manual reverse rotation of the drive seat, and further improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0024] in:

[0025] Figure 1 It is a schematic diagram of the overall structure of the adjustable anal dilator used for anorectal stapler of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure of the connecting seat and the expansion plate of the adjustable anal dilator used for the anorectal stapler of the present invention.

[0027] Figure 3 It is a schematic diagram of the anatomical structure of a connecting seat and a fixing rod of an adjustable anal dilator used for anorectal stapler of the present invention.

[0028] Figure 4 The present invention is a schematic diagram of the structure of a vibration component of an adjustable anal dilator for anorectal stapler.

[0029] Figure 5 This is a schematic diagram of the disassembly of the drive block and movable rod structure of the adjustable anal dilator used for the anorectal stapler of the present invention.

[0030] Figure 6 The present invention is a schematic diagram of the structure of the adjustment mechanism of the adjustable anal dilator used for the anorectal stapler.

[0031] Figure 7 The present invention is a schematic diagram of the anatomical structure of a driving seat of an adjustable anal dilator for anorectal stapler.

[0032] Figure 8 It is a schematic diagram of the disassembly of the driving ring and movable rod structure of the adjustable anal dilator used for the anorectal stapler of the present invention.

[0033] Description of reference numerals:

[0034] 1. Connecting seat; 101. Guide block; 102. Movable cavity; 2. Expansion plate; 3. Movable rod; 301. Adjusting rod; 302. External thread; 303. Screw sleeve; 4. Fixing rod; 401. Arc rack; 5. Vibration assembly; 501. Drive block; 502. Slider; 503. First spring; 504. Drive rod; 505. Connecting rod; 6. Adjusting mechanism; 601. Drive seat; 602. Screw rod; 603. Transmission gear; 604. Driving ring; 605. Limiting cylinder; 606. Limiting ring; 607. Limiting block; 608. Threaded groove; 609. Second spring; 610. Pressing block; 611. Third spring; 612. Connecting ring. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Example 1

[0038] Reference Figure 1-6 , which is the first embodiment of the present invention, provides an adjustable anal dilator for an anorectal stapler, the adjustable anal dilator for anorectal stapler comprising two connecting seats 1, a plurality of expansion plates 2 are arranged in a circular shape with equal intervals between the two connecting seats 1, a movable rod 3 is rotatably connected in one connecting seat 1, a fixed rod 4 is fixedly connected to one side of the other connecting seat 1, the movable rod 3 is sleeved in the fixed rod 4, a vibration assembly 5 is connected in the connecting seat 1, the vibration assembly 5 is connected to the expansion plate 2, and an adjustment mechanism 6 is connected between one end of the fixed rod 4 and the movable rod 3.

[0039] The vibration assembly 5 includes a driving block 501 connected to the movable rod 3 . A plurality of sliders 502 are disposed outside the driving block 501 . The sliders 502 are elastically connected to the connecting seat 1 , and a connecting rod 505 is hinged between the sliders 502 and the expansion plate 2 .

[0040] The adjusting mechanism 6 includes a driving seat 601 rotatably connected to the fixed rod 4, and two screw rods 602 are threadedly engaged on the driving seat 601. One end of the screw rod 602 is connected to the movable rod 3, and the other end is fixedly connected to a transmission gear 603. The transmission gear 603 is meshed and connected with an arc-shaped rack 401 fixedly provided on the fixed rod 4.

[0041] In the above technical solution, when the fixed rod 4 remains fixed and the movable rod 3 moves to one side, the two connecting seats 1 can approach each other, so that the expansion plate 2 can be driven by the connecting rod 505 to move to the side away from the center of the connecting seat 1, and each expansion plate 2 moves synchronously to achieve equal-spaced expansion. The movable rod 3 can rotate while moving, so that the driving block 501 contacts each slider 502 one by one, so that the slider 502 moves in the connecting seat 1 and drives the expansion plate 2 to move back and forth a small distance, thereby achieving vibration of the expansion plate 2.

[0042] It can be understood that the movable rod 3 moves through the connecting seat 1 connected to the fixed rod 4, and the right end passes through the fixed rod 4 and extends to the other side, and the adjustment mechanism 6 is arranged between the right end of the movable rod 3 and the right end of the fixed rod 4.

[0043] Among them, by rotating the driving seat 601, one end of the screw 602 drives the movable rod 3 to rotate, and the other end drives the transmission gear 603 to engage with the arc rack 401, so that the screw 602 rotates, and the screw 602 is displaced on the driving seat 601, thereby driving the movable rod 3 to move, thereby making the movable rod 3 rotate continuously and move intermittently at the same time, so that the expansion plate 2 can maintain vibration while intermittently expanding, so that the patient can perform massage pre-loosening anal dilation to improve comfort and safety.

[0044] A guide block 101 is fixedly connected to one side of the connection seat 1 connected to the movable rod 3. The guide block 101 is a conical structure. The arrangement of the guide block 101 facilitates the device to easily enter the anus and rectum.

[0045] An active cavity 102 is provided in the connecting seat 1 , and the slider 502 is slidably connected to the active cavity 102 . A first spring 503 is connected between one side of the slider 502 and the active cavity 102 , and a driving rod 504 is fixedly connected to the other side. The driving rod 504 is in sliding contact with the driving block 501 .

[0046] In the above technical solution, the movable cavity 102 is used to slide and limit the slider 502, so that the slider 502 is displaced radially in the connecting seat 1. When the driving block 501 rotates and drives the driving rod 504, the slider 502 moves a small distance to the side away from the center of the connecting seat 1. After the driving block 501 cancels the contact with the driving rod 504, the first spring 503 drives the slider 502 to slide in the opposite direction and reset. The sliders 502 at the same position in the two connecting seats 1 move synchronously, so that the expansion plate 2 is driven to vibrate.

[0047] In actual work, when the driving block 501 rotates, the two sides of the driving block 501 contact each driving rod 504 one by one, so that the two expansion plates 2 that are farthest apart vibrate synchronously. Every time the driving block 501 rotates one circle, each expansion plate 2 completes two vibrations, so that during the anal dilation process, only two expansion plates 2 vibrate each time. The expansion plates 2 cooperate to perform cyclic vibration, which can reduce the discomfort of the patient during anal dilation.

[0048] There are two arc-shaped racks 401, and they are symmetrically arranged on the fixed rod 4. When the driving seat 601 rotates, it drives the screw 102 to revolve around the fixed rod 4. The two screws 602 cooperate to drive the movable rod 3 to rotate synchronously, so that the driving block 501 drives the driving rod 504 to move. When the transmission gear 603 engages with the arc-shaped rack 401, it rotates at a certain angle, so that the screw 602 rotates and moves to the right on the driving seat 601, thereby driving the movable rod 3 to move. The movable rod 3 drives the two connecting seats 1 to approach each other, so that the expansion plate 2 expands outward.

[0049] The adjustment mechanism 6 also includes a driving ring 604 , which is slidably connected to the movable rod 3 , and one side of the driving ring 604 is fixedly connected to a limiting cylinder 605 , and one end of the screw rod 602 is plugged into and matched with the limiting cylinder 605 .

[0050] In the above technical solution, one end of the screw 602 is inserted into the limiting tube 605, so that when the screw 602 revolves around the fixed rod 4, the movable rod 3 is driven to rotate synchronously by driving the driving ring 604. When the moving driving ring 604 cancels the contact between the limiting tube 605 and the screw 602, the movable rod 3 can be driven to rotate by rotating the driving ring 604 alone, so that the expansion plate 2 can vibrate when the movement of the expansion plate 2 is stopped, which is convenient for vibration relief for some patients during anal dilation, thereby improving the applicable scenarios.

[0051] The adjustment mechanism 6 also includes a limit ring 606, which is sleeved on the fixed rod 4 and rotatably connected to one end of the screw 602. The limit ring 606 is slidably arranged on the arc-shaped rack 401 to limit the end of the screw 602 so that the screw 602 can remain more stable during revolution and rotation.

[0052] It is understandable that, referring to Figure 8 The right end of the movable rod 3 is engraved with a length scale, the unit of the length scale is millimeter, and the length scale is adapted to the expansion distance of the expansion plate 2, so that when the movable rod 3 moves axially on the fixed rod 4, the expansion diameter of the expansion plate 2 can be known through the length scale value at the fixed rod 4, thereby improving the accuracy of the anal dilation operation.

[0053] During use, the doctor holds the fixed rod 4 with one hand to insert one end of the guide block 101 into the anus and rectum first, so that the expansion plate 2 moves to the corresponding depth and then stops moving, and then drives the driving seat 601 to rotate with the other hand. When the driving seat 601 rotates, it drives the screw 102 to revolve around the fixed rod 4, and the two screws 602 cooperate with the driving ring 604 to drive the movable rod 3 to rotate synchronously, so that the driving block 501 contacts each driving rod 504 one by one, driving the expansion plate 2 connected to the slider 502 to vibrate, and massage the anal expansion area. At the same time, when the transmission gear 603 is engaged with the arc rack 401, it rotates at a certain angle, so that the screw 602 rotates and moves to the right on the driving seat 601, thereby driving the movable rod 3 to move, and the movable rod 3 drives the two connecting seats 1 to approach each other, so that each expansion plate 2 intermittently expands outward until the expansion of the inside of the patient's anus and rectum is completed.

[0054] Then, the driving seat 601 can be rotated in the reverse direction to shrink the expansion plates 2. After the device is taken out from the anorectum, the anal expansion sleeve used for the anorectal stapler can be inserted into the anorectum of the patient to perform anorectal treatment surgery.

[0055] Example 2

[0056] Reference Figure 4 and Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that the driving block 501 is in a ladder-shaped structure, and the driving block 501 is slidably connected to the movable rod 3.

[0057] In the above technical solution, the driving block 501 can be displaced and adjusted along the axial direction of the movable rod 3 in the movable cavity 102. When the driving block 501 is located on the left side of the movable cavity 102, the driving block 501 may not contact the driving rod 504, thereby reducing the driving force required for the rotation of the driving seat 601 and allowing the expansion plate 2 to expand directly. In the process of the driving block 501 gradually moving to the right, the displacement amplitude of the driving rod 504 is driven to increase accordingly, thereby adjusting the vibration amplitude of the expansion plate 2 to improve applicability.

[0058] An adjusting rod 301 is rotatably connected inside the movable rod 3 . An external thread 302 is fixedly arranged on the adjusting rod 301 . A screw sleeve 303 is threadedly connected to the external thread 302 . The screw sleeve 303 is fixedly connected to the driving block 501 .

[0059] In the above technical solution, one end of the adjusting rod 301 passes through the movable rod 3 and is fixedly connected with a knob. When the knob is turned, the external thread 302 drives the screw sleeve 303 to move in the movable rod 3, and the screw sleeve 303 drives the driving block 501 to rotate synchronously to achieve position adjustment of the driving block 501.

[0060] The remaining structures are the same as those of Example 1.

[0061] Example 3

[0062] Reference Figure 7 and Figure 8 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: a through hole larger than the diameter of the screw rod 602 is provided on the driving seat 601, and a limiting block 607 is slidably connected inside the driving seat 601, a thread groove 608 matched with the screw rod 602 is provided on one side of the limiting block 607, and a second spring 609 is elastically connected to the driving seat 601 on the other side, and a pressing block 610 is fixedly connected to the limiting block 607, and one end of the pressing block 610 is arranged on the outer side of the driving seat 601.

[0063] In the above technical solution, the second spring 609 drives the thread groove 608 of the limit block 607 to contact the screw 602, and the limit block 607 cooperates with the through hole to limit the screw 602, so that when the screw 602 rotates, it cooperates with the thread groove 607 to realize the self-movement of the screw 602. When pressure is applied to the pressing block 610, the thread groove 607 can cancel the contact with the screw 602, so that the movable rod 3 can be driven to slide freely, so that the movable rod 3 can be driven to move quickly, and each expansion plate 2 can be quickly contracted, thereby improving the convenience of operation.

[0064] A third spring 611 is sleeved on the screw rod 602 . One end of the third spring 611 is fixedly connected to the driving seat 601 , and the other end is fixedly connected to a connecting ring 612 . The connecting ring 612 is rotatably connected to the screw rod 602 .

[0065] In the above technical solution, the screw rod 602 drives the movable rod 3 to move while driving the third spring 611 to stretch. When the pressing block 611 drives the limit block 607 to cancel the contact with the screw rod 602, the third spring 611 contracts and drives the movable rod 3 to quickly and automatically reset, further improving the convenience of use.

[0066] The remaining structures are the same as those of Example 1.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An adjustable anal dilator for an anorectal stapler, characterized in that: The invention comprises two connecting seats (1), a plurality of expansion plates (2) are arranged between the two connecting seats (1) in a circular shape and at equal intervals, a movable rod (3) is rotatably connected inside one of the connecting seats (1), a fixed rod (4) is fixedly connected to one side of the other connecting seat (1), the movable rod (3) is sleeved inside the fixed rod (4), a vibration component (5) is connected inside the connecting seat (1), the vibration component (5) is connected to the expansion plate (2), and an adjustment mechanism (6) is connected between one end of the fixed rod (4) and the movable rod (3); The vibration assembly (5) comprises a driving block (501) connected to the movable rod (3), a plurality of sliders (502) are arranged on the outside of the driving block (501), the sliders (502) are elastically connected to the connecting seat (1), and a connecting rod (505) is hinged between the sliders (502) and the expansion plate (2); The adjusting mechanism (6) comprises a driving seat (601) rotatably connected to the fixed rod (4); two screw rods (602) are threadedly engaged on the driving seat (601); one end of the screw rod (602) is connected to the movable rod (3); the other end is fixedly connected to a transmission gear (603); the transmission gear (603) is meshedly connected to an arc-shaped rack (401) fixedly provided on the fixed rod (4).

2. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: A guide block (101) is fixedly connected to one side of the connection seat (1) connected to the movable rod (3).

3. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: The connecting seat (1) is provided with an active cavity (102), the slider (502) is slidably connected to the active cavity (102), a first spring (503) is connected between one side of the slider (502) and the active cavity (102), and a driving rod (504) is fixedly connected to the other side, and the driving rod (504) is in slidable contact with the driving block (501).

4. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: The driving block (501) has a ladder-shaped structure, and the driving block (501) is slidably connected to the movable rod (3).

5. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: An adjusting rod (301) is rotatably connected inside the movable rod (3), an external thread (302) is fixedly provided on the adjusting rod (301), a screw sleeve (303) is threadedly connected to the external thread (302), and the screw sleeve (303) is fixedly connected to the driving block (501).

6. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: The number of the arc-shaped racks (401) is two, and they are symmetrically arranged on the fixing rod (4).

7. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: The adjusting mechanism (6) further comprises a driving ring (604) which is slidably connected to the movable rod (3), and one side of the driving ring (604) is fixedly connected to a limiting cylinder (605), and one end of the screw rod (602) is plugged into and matched with the limiting cylinder (605).

8. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: The adjustment mechanism (6) further comprises a limiting ring (606), which is sleeved on the fixing rod (4) and rotatably connected to one end of the screw rod (602).

9. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: The driving seat (601) is provided with a through hole having a diameter larger than that of the screw rod (602), and a limiting block (607) is slidably connected inside the driving seat (601), a thread groove (608) matching with the screw rod (602) is provided on one side of the limiting block (607), and a second spring (609) is elastically connected to the driving seat (601) on the other side, and a pressing block (610) is fixedly connected to the limiting block (607), and one end of the pressing block (610) is arranged on the outside of the driving seat (601).

10. The adjustable anal dilator for anorectal stapler according to claim 1, characterized in that: A third spring (611) is sleeved on the screw rod (602), one end of the third spring (611) is fixedly connected to the driving seat (601), and the other end is fixedly connected to a connecting ring (612), and the connecting ring (612) is rotatably connected to the screw rod (602).

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