An electrically powered ligation device

Abstract

The application discloses an electric ligation device, which comprises a shell, a pulling assembly and a suction pipe are slidably connected to the inner wall of the shell in the horizontal direction, the rear end of the suction pipe is provided with an elastic release mechanism fixed to the inner wall of the shell, the elastic release mechanism is in abutment with the pulling assembly, one side of the elastic release mechanism is provided with a stop mechanism which can be pressed down by the pulling assembly, the stop mechanism is slidably connected to the inner wall of the shell, the stop mechanism allows the elastic release mechanism to slide freely in the pressed-down state, an electric driving assembly is further arranged on the inner wall of the shell, and the top of the electric driving assembly is engaged with the pulling assembly. The application can accurately control the backward moving distance of the pulling strip, and improves the stability of the tension degree of the elastic line. Meanwhile, the elastic line is instantaneously pushed out and released during the ligation process, the ligation and tightening of the elastic line are simultaneously completed, and the reliability of the elastic line release and the stability of the elastic line ligation of the hemorrhoids are greatly improved.

Description

Technical Field

[0001] This invention relates to a ligation medical device, and more particularly to an electric ligation device. Background Technology

[0002] Ligating devices are currently widely used in the treatment of hemorrhoids. The ligating device is mainly used to put an elastic thread on the hemorrhoid tissue. Then, by tightening the elastic thread, the blood supply to the hemorrhoid tissue is blocked, and the hemorrhoids gradually die and shrink.

[0003] Existing ligation devices generally use manual tensioning of the elastic cord or a screw-driven tensioning method. The former is generally manual, relying mainly on the operator's sense of tension. This method is prone to inconsistencies in tension due to individual differences. Sometimes the cord may not be tightened enough to completely block the blood supply to the hemorrhoids or may loosen easily. In other cases, excessive tension may cause the cord to break. Therefore, existing ligation devices require a high level of operator experience. The latter method uses a screw to control the tightening of the elastic cord. This method is slower, and the cord is slowly ligated onto the hemorrhoids. The cord may slip off, leading to ligation failure. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide an electric ligator that solves the problems of slow elastic thread tightening speed and difficulty in controlling the tightness of the ligator in existing ligators.

[0005] Technical solution: The electric ligation device of the present invention includes a housing. A traction assembly and a suction tube are slidably connected to the inner wall of the housing in the horizontal direction. The rear end of the suction tube is provided with an elastic release mechanism fixed to the inner wall of the housing at one end. The elastic release mechanism abuts against the traction assembly. A stop mechanism that can be pressed down by the traction assembly is provided on one side of the elastic release mechanism. The stop mechanism is slidably connected to the inner wall of the housing. The stop mechanism allows the elastic release mechanism to slide freely in the pressed state. An electric drive assembly for driving the translation of the traction assembly is also provided on the inner wall of the housing.

[0006] Preferably, the pulling assembly includes a pulling strip slidably connected to the inner wall of the housing. A rack is provided on one rear side of the pulling strip, which meshes with the top of the electric drive mechanism. The side of the pulling strip also has an inclined surface for a downward-pressing stop mechanism. A protruding strip extends from the front end of the inclined surface. A second protrusion is provided at the top of the pulling strip, abutting against the elastic release mechanism. An elastic cord is provided at the front end of the pulling strip, and the loop of the elastic cord is fitted onto the front end of the suction tube. During the backward movement, the pulling assembly can not only pull the elastic cord but also control the position of the elastic release mechanism and activate the stop mechanism, achieving sudden release and instantaneous tightening of the elastic cord. This invention drives the elastic cord with a motor and rack, and sets precise position control, improving the stability of the cord's tightness. Simultaneously, the elastic cord is instantly pushed out and released, greatly improving the reliability of the elastic cord release and the stability of the elastic cord in gripping hemorrhoids.

[0007] Preferably, the front end of the tension bar is detachably connected to a spring-loaded pull rod that is slidably connected to the housing, and the front end of the spring-loaded pull rod is connected to the lower end of the spring-loaded line. This detachable connection facilitates the initial placement of the spring-loaded line and the replacement of accessories.

[0008] Preferably, the front end of the housing is provided with a thread-removing ring, the front end of the suction tube extends from inside the thread-removing ring, and the front end face of the thread-removing ring is provided with a thread-locking groove. The thread-locking groove can prevent the splice joint of the elastic thread from moving.

[0009] Preferably, the elastic release mechanism includes a first spring fixed at one end to the inner wall of the housing, a drive tube at the other end of the first spring, a third protrusion at the bottom of the drive tube abutting against a second protrusion, and the front end of the drive tube communicating with the rear end of the suction tube. The first spring can provide potential energy for the sudden release of the drive tube, and the abutment between the third protrusion and the second protrusion can ensure that the drive tube moves backward synchronously with the pull bar in the initial stage of the pull bar's backward movement and help the drive tube to reset.

[0010] Preferably, the stopping mechanism includes a stepped stop block slidably connected to the inner wall of the housing. The lower part of the stepped stop block has a rounded corner. When the inclined plane passes through the stepped stop block, the rounded corner is pressed down by the inclined plane. A fourth protrusion is provided on one side of the drive tube. A fifth protrusion for blocking the fourth protrusion is provided in the middle of the stepped stop block. A release rod is provided at the bottom of the stepped stop block. The lower end of the release rod is slidably connected to the housing. A second spring is sleeved on the release rod. The upper end of the second spring is located on the bottom surface of the stepped stop block, and the lower end of the second spring is located on the inner wall of the housing. The stopping mechanism is mainly used to temporarily block the elastic release mechanism. After the stopping mechanism is pressed down by the protrusion, it can release the obstruction of the elastic release mechanism, thereby producing the effect of the elastic release mechanism driving the suction tube to suddenly release and move backward.

[0011] Preferably, the outer side of the stepped stop is provided with a slider, and the inner wall of the housing is provided with a slide rail perpendicular to the pull bar, and the slider is slidably connected to the slide rail.

[0012] Preferably, the electric drive mechanism includes a drive motor mounted on the inner wall of the housing, a gear mounted on the output shaft of the drive motor, the gear meshing with a rack, and a control component electrically connected to the drive motor. The gear and rack work together to uniformly move the traction bar backward, precisely controlling the position of the traction bar.

[0013] Preferably, the control component includes a main control circuit board electrically connected to the drive motor, a first position control switch and a second position control switch on the main control circuit board, a first boss on the rear of the pull bar, the first position control switch and the second position control switch being located above the first boss, a take-up button on the housing, and the main control circuit board electrically connected to the take-up button.

[0014] Preferably, a fixing block is further provided on the inner wall of the housing, and the traction bar and drive tube are slidably connected to the fixing block. A first positioning rib and a second positioning rib are symmetrically provided behind the traction bar. The first positioning rib and the second positioning rib are arranged parallel to the traction bar.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention can precisely control the backward movement distance of the traction strip, improving the stability of the elastic thread tension. Simultaneously, the elastic thread is instantly released during the ligation process, and the ligation and tightening of the elastic thread are completed simultaneously, greatly improving the reliability of the elastic thread release and the stability of the elastic thread in grasping hemorrhoids. Attached Figure Description

[0016] Figure 1 A schematic diagram of the internal structure of an electric bandaging device;

[0017] Figure 2 This is a schematic diagram of the tensioning assembly.

[0018] Figure 3 A schematic diagram of the elastic release mechanism, the stop mechanism, and the traction assembly;

[0019] Figure 4 This is an installation diagram of the suction tube release lever. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0021] Example: An electric ligator, such as Figures 1-4As shown, the device includes a housing 9. A pull bar 5 and a suction tube 6 are slidably connected to the inner wall of the housing 9. A rack 55 is provided on one side of the rear of the pull bar 5. An elastic cord pull rod 4, slidably connected to the housing 9, is provided at the front end of the pull bar 5. The pull bar 5 and the elastic cord pull rod 4 can be detachably connected by snap-fit, threaded connection, riveting, screw connection, or insertion. In this embodiment, a groove 51 is provided at the front end of the pull bar 5, and a latch 41 is provided at the rear end of the elastic cord pull rod 4. The latch 41 engages with the groove 51 for connection.

[0022] The front end of the housing 9 is provided with a thread-removing ring 21, and the front end of the suction tube 1 extends out from inside the thread-removing ring 21. The front end face 22 of the thread-removing ring 21 is provided with a thread-holding groove 23. The loop of the elastic cord 3 is fitted onto the protruding part of the front end of the suction tube 1, and the lower end of the elastic cord passes through the thread-holding groove 23 and connects to the front end of the elastic cord pulling rod 4, or it can be directly connected to the front end of the pull bar 5.

[0023] The pull bar 5 has a bevel 54 on its side, and a protrusion 541 extends from the front end of the bevel 54. The top of the pull bar 5 has a first protrusion 52 and a second protrusion 53. A cylinder 91 is provided on the inner wall of the housing 9. The rear end of the suction tube 1 is connected to a drive tube 6. The drive tube 6 is slidably connected to the housing 9. A hook 61 is provided on the drive tube 6. A first spring 7 is provided between the cylinder 91 and the hook 61. A third protrusion 62 is provided at the bottom of the drive tube 6. The third protrusion 62 abuts against the second protrusion 53. The second protrusion 53 is located behind the third protrusion 62. The inner wall of the housing 9 is also provided with a fixing block 10, a first positioning rib 92 and a second positioning rib 93. The traction strip 5 and the drive tube 6 are slidably connected to the fixing block 10. The first positioning rib 92 and the second positioning rib 93 are arranged in parallel. A protrusion is provided on the rear side of the traction strip 5. The protrusion is limited to sliding in the horizontal direction by the first positioning rib 92 and the second positioning rib 93, thereby further ensuring the stability of the traction strip 5 during the backward movement.

[0024] The inner wall of the housing 9 is provided with a slide rail 95 perpendicular to the pull bar 5. A slider 141 is slidably connected inside the slide rail 95. A stepped stop 14 is provided on the inner side of the slider 141. The lower part of the stepped stop 14 is provided with a rounded corner 143. The height of the rounded corner 143 is approximately equal to that of the inclined plane 54. When the inclined plane 54 passes through the stepped stop 14, the rounded corner 143 is pressed down by the inclined plane 54. A fourth protrusion 63 is provided on one side of the drive tube 6. A fifth protrusion 142 for blocking the fourth protrusion 63 is provided in the middle of the stepped stop 14. A release rod 144 is provided at the bottom of the stepped stop 14. The lower end of the release rod 144 is slidably connected to the housing 9. A second spring 15 is sleeved on the release rod 144. The upper end of the second spring 15 is located on the bottom surface of the stepped stop 14, and the lower end of the second spring 15 is located on the inner wall of the housing 9. The fixing block 10 does not contact the second spring 15.

[0025] A drive motor 11 is mounted on the inner wall of the housing 9. The drive motor 11 is secured to the housing by a motor retaining ring 12. A gear 13 is mounted on the output shaft of the drive motor 11, and the gear 13 meshes with a rack 55. A control component is electrically connected to the drive motor 11. The control component includes a main control circuit board 8 electrically connected to the drive motor 11. The main control circuit board 8 has a first position control switch 81 and a second position control switch 82. A first protrusion 52 is located on the rear of the pull bar 5. The first position control switch 81 and the second position control switch 82 are located above the first protrusion 52. A retractable button 16 is located on the housing 9, and the main control circuit board 8 is electrically connected to the retractable button 16. When the first protrusion 52 moves below the first position control switch 81 or the second position control switch 82, the position control switch is closed or opened.

[0026] Working process and principle:

[0027] In the initial state, the suction port 101 of the suction tube 1 extends about 0.5 to 10 mm beyond the front end face 22. The elastic cord loop is fitted between the suction port 101 and the front end face 22. The lower end of the elastic cord 3 is taut. The first spring 7 is stretched. The first boss 52 is located below the first position control switch 81. The rear end of the drive tube 6 can be connected to the negative pressure device.

[0028] During ligation, the suction port 101 of the suction tube 1 is aligned with the hemorrhoid tissue. Pressing the retraction button 16 activates the main circuit board 8, which in turn controls the drive motor 11 to start. The drive motor 11 drives the gear 13 to rotate, and the rotation of the gear 13 drives the traction bar 5 to slide backward through the rack 55. The first protrusion 52, the second protrusion 53, and the elastic cord pull rod 4 at the front end of the traction bar 5 also slide backward synchronously. At this time, the second protrusion 53 separates from the third protrusion 62, and the drive tube 6 also slides backward under the pull force of the first spring 7. The drive tube 6 drives the suction tube 1 to slide backward synchronously until the fourth protrusion 63 and the fifth protrusion 142 come into contact. Under the obstruction of the fifth protrusion 142, the drive tube 6 and the suction tube 1 stop moving backward. At this time, the loop of the elastic cord 3 is still between the suction port 101 and the front end face 22, but the distance between the suction port 101 and the front end face 22 is greatly reduced. Subsequently, the pull bar 5 continues to slide backward, and the inclined surface 54 abuts against the rounded corner 143. When the inclined surface 54 passes through the side of the step stop 14, it completely presses down the rounded corner 143. The protrusion 541 abuts against the rounded corner 143 to maintain the downward pressure of the step stop 14. The rounded corner 143 drives the entire step stop 14 and the release rod 144 down along the slide rail 95 and compresses the second spring 15. At this time, the fifth protrusion 142 on the step stop 14 separates from the fourth protrusion 63 during the downward movement and no longer obstructs the fourth protrusion 63. The first spring 7 instantly... When the elastic force is released, the drive tube is suddenly released and slides backward under the pull of the first spring 7. The drive tube 6 drives the suction tube 1 to move backward quickly. When the suction port 101 at the front end of the suction tube 1 is flush with the front end face 22, the loop of the elastic line 3 slips off from the front end of the suction tube 1 and is placed on the hemorrhoid tissue. The traction strip 5 pulls the lower end of the elastic line at the same time. Under the guidance of the wire groove 23, the loop of the elastic line 3 is quickly tightened to ensure that the elastic line 3 can be quickly and stably tied on the hemorrhoid. Since the traction and tying process is extremely short, it is not easy for the elastic line 3 to slip off.

[0029] After the elastic cord 3 is released from the suction port 11, it continues to be pulled towards the rear end by the pull bar 5. The right outer shell 2 of the suction tube is designed with a wire-locking groove 23, which can prevent the splice joint of the elastic cord 3 from moving. The elastic cord 3 is gradually tightened with the movement of the pull bar 5. When the protrusion 52 on the pull bar 5 moves to below the position control switch 82, the main control circuit board 8 controls the drive motor 11 to stop, and the tightening of the elastic cord 3 is completed.

[0030] During reset, the main control circuit board 8 controls the drive motor 11 to reverse, and the pull bar 5 moves forward with the rack 55. The second boss 53 first abuts against the third boss 62, and then the pull bar 5 drives the drive tube 6 to move forward. As the drive tube 6 moves forward, the first spring 7 is stretched again until the drive tube 6 resets. When the inclined surface 54 leaves the rounded corner 143, the fourth boss 63 has reset with the drive tube 6 to the front of the stepped stop 14, and the stepped stop 14 resets upward under the action of the second spring 15. When the boss 52 moves to below the position control switch 81, the main control circuit board 8 controls the drive motor 11 to stop, and the front end of the suction tube 1 extends out from the front end face 22 and resets, completing the reset.

Claims

1. An electric bandaging device, comprising a housing (9), characterized in that, The inner wall of the housing (9) is slidably connected with a traction assembly and a suction tube (1) in the horizontal direction. The rear end of the suction tube (1) is provided with an elastic release mechanism. The front end of the elastic release mechanism is connected to the suction tube (1). The rear end of the elastic release mechanism is located on the housing (9). The elastic release mechanism abuts against the traction assembly. One side of the elastic release mechanism is provided with a stop mechanism that can be pressed down by the traction assembly. The stop mechanism is slidably connected to the inner wall of the housing (9). The stop mechanism allows the elastic release mechanism to slide freely in the pressed state. The inner wall of the housing (9) is also provided with an electric drive assembly for driving the traction assembly to translate. The pulling assembly includes a pulling strip (5) slidably connected to the inner wall of the housing (9). A rack (55) is provided on one side of the rear part of the pulling strip (5). The rack (55) meshes with the top of the electric drive mechanism. The side of the pulling strip (5) is also provided with a slope (54) for a downward stop mechanism. A protrusion (541) extends from the front end of the slope (54). A second protrusion (53) is provided on the top of the pulling strip (5). The second protrusion (53) abuts against the elastic release mechanism. An elastic line (3) is provided at the front end of the pulling strip (5). The loop of the elastic line (3) is fitted onto the front end of the suction tube (1). The elastic release mechanism includes a first spring (7) fixed at one end to the inner wall of the housing (9), and a drive tube (6) at the other end of the first spring (7). The bottom of the drive tube (6) is provided with a third protrusion (62), which abuts against a second protrusion (53). The front end of the drive tube (6) is connected to the rear end of the suction tube (1). The stop mechanism includes a stepped stop (14) slidably connected to the inner wall of the housing (9). The lower part of the stepped stop (14) is provided with a rounded corner (143). When the inclined plane (54) passes through the stepped stop (14), the... The rounded corner (143) is pressed down by the inclined surface (54). A fourth protrusion (63) is provided on one side of the drive tube (6). A fifth protrusion (142) for blocking the fourth protrusion (63) is provided in the middle of the stepped stop (14). A release rod (144) is provided at the bottom of the stepped stop (14). The lower end of the release rod (144) is slidably connected to the housing (9). A second spring (15) is sleeved on the release rod (144). The upper end of the second spring (15) is located on the bottom surface of the stepped stop (14), and the lower end of the second spring (15) is located on the inner wall of the housing (9).

2. The electric bandaging device according to claim 1, characterized in that, The front end of the pull bar (5) is detachably connected to an elastic line pull rod (4) that is slidably connected to the housing (9), and the front end of the elastic line pull rod (4) is connected to the lower end of the elastic line (3).

3. The electric bandaging device according to claim 1, characterized in that, The front end of the housing (9) is provided with a wire removal ring (21), and the front end of the suction tube (1) extends out from inside the wire removal ring (21). The front end face (22) of the wire removal ring (21) is provided with a wire retaining groove (23).

4. The electric bandaging device according to claim 1, characterized in that, The outer side of the stepped stop (14) is provided with a slider (141), and the inner wall of the housing (9) is provided with a slide rail (95) perpendicular to the pull bar (5). The slider (141) is slidably connected to the slide rail (95).

5. The electric banding device according to claim 1, characterized in that, The electric drive mechanism includes a drive motor (11) disposed on the inner wall of the housing (9), and a gear (13) is provided on the output shaft of the drive motor (11). The gear (13) meshes with the rack (55), and a control component is electrically connected to the drive motor (11).

6. The electric bandaging device according to claim 5, characterized in that, The control component includes a control main circuit board (8) electrically connected to the drive motor (11). The control main circuit board (8) is provided with a first position control switch (81) and a second position control switch (82). The rear part of the pull bar (5) is provided with a first boss (52). The first position control switch (81) and the second position control switch (82) are located above the first boss (52). The housing (9) is provided with a take-up button (16). The control main circuit board (8) is electrically connected to the take-up button (16).

7. The electric banding device according to claim 1, characterized in that, The inner wall of the housing (9) is also provided with a fixing block (10), the traction strip (5) and the drive tube (6) are slidably connected to the fixing block (10), and the first positioning rib (92) and the second positioning rib (93) are symmetrically provided behind the traction strip (5).

Images