An external biopsy channel speed limiter

Abstract

The present application relates to a kind of external biopsy channel speed limiter, the shell of the speed limiter is provided with speed limiting support plate on one side, the upper end of speed limiting support plate is provided with biopsy forceps entrance, the side of biopsy forceps entrance is provided with sensor, and the lower end is provided with endoscope biopsy channel interface, biopsy forceps is inserted from biopsy entrance, then is stretched out into biopsy channel from endoscope biopsy channel interface by closely adhering to speed limiting support plate, and rotationally connected with cam in shell by drive device control, the outer end of cam is provided with press wheel, when the speed limiting mark on biopsy forceps moves to the position corresponding to sensor downwards, sensor sends the position signal to the controller of drive device to drive cam rotation, and the press wheel on cam can press biopsy forceps on speed limiting support plate, increase friction resistance, force biopsy forceps to slow down movement, avoid biopsy forceps to be inserted too long too fast, make the experience of patient relatively comfortable, and not easy to damage gastrointestinal mucosa.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an external biopsy channel speed limiter. BACKGROUND

[0002] The endoscopic biopsy forceps is a medical examination device, which is inserted into the stomach or intestinal tract through a thin and soft tube, and the outer end of the tube is provided with an endoscope and a biopsy forceps. The doctor can directly observe the suspicious lesions of the esophagus, stomach, duodenum or intestinal tract under the monitoring of the endoscope, especially for the tiny lesions. The doctor can directly observe the true situation of the examined part. If suspicious lesions are found, the biopsy forceps is extended from the tube to aim at the lesion, and then the forceps head of the biopsy forceps is driven to open to clamp the lesion tissue. The obtained lesion tissue is sent for pathological examination to determine the nature of the lesion. The process of extending the biopsy forceps from the tube is manually completed by the doctor according to experience. Therefore, the doctor needs to closely observe the extension length of the forceps head during the insertion process. If the biopsy forceps is extended too long and too fast, the patient's pain will be aggravated, and the gastrointestinal mucosa is very easy to be damaged, and even the lesion bleeding and other complications may be caused. SUMMARY

[0003] In order to solve the above problems, the present application provides an external biopsy channel speed limiter.

[0004] The technical scheme of the present application is as follows: an external biopsy channel speed limiter, comprising a speed limiter shell, a cam, a pressure roller and a speed limiting support plate; the inside of the speed limiter shell is provided with a containing groove, the outer port of the containing groove is provided with a fixed support, the speed limiting support plate is vertically fixedly connected to the inner side surface of the fixed support, the containing groove slot at the upper end of the speed limiting support plate is provided with a biopsy forceps inlet, and the containing groove slot at the lower end is provided with an endoscopic biopsy channel interface, the biopsy forceps inlet and the endoscopic biopsy channel interface are vertically opposite; the cam is rotationally connected in the containing groove through a cam shaft, one side surface of the speed limiter shell is provided with a driving device, the output shaft of the driving device is coaxially fixedly connected with the cam shaft, the pressure roller is rotationally connected to the protruding part of the cam, and the rolling surface of the pressure roller corresponds to the middle part of the speed limiting support plate; a sensor is arranged at the upper port of the containing groove, a speed limiting mark is arranged on the biopsy forceps, a notch is arranged on the inner side of the biopsy forceps inlet, and the sensor corresponds to the internal passage of the biopsy forceps inlet through the notch.

[0005] Preferably, the other side surface of the speed limiter shell is provided with a reset knob, and the reset knob is coaxially fixedly connected with the cam.

[0006] Preferably, the side surface of the pressure roller is provided with a limiting groove with a V-shaped cross section in the circumferential direction, and the size of the limiting groove matches the size of the biopsy forceps.

[0007] Preferably, the speed limiting support plate is made of a material with large frictional resistance.

[0008] Preferably, the driving device is a speed reducer motor, and the sensor is connected to the controller of the speed reducer motor through the control module.

[0009] Preferably, the speed limit mark is in bright color, and the sensor is a color sensor.

[0010] The present application has the following beneficial technical effects:

[0011] (1) The shell of the speed limiter is provided with a speed limit support plate on one side, the upper end of the speed limit support plate is provided with a biopsy forceps inlet, one side of the biopsy forceps inlet is provided with a sensor, and the lower end is provided with an endoscope biopsy channel interface; the biopsy forceps are inserted into the biopsy inlet, then extend out from the endoscope biopsy channel interface and into the biopsy channel while closely abutting the speed limit support plate; a cam controlled by a driving device is rotatably connected in the shell; the outer end of the cam is provided with a pressure wheel; when the speed limit mark on the biopsy forceps moves downward to a position corresponding to the sensor, the sensor sends a signal of the position to the controller of the driving device to drive the cam to rotate; the pressure wheel on the cam can press the biopsy forceps against the speed limit support plate, increase the friction and resistance, force the biopsy forceps to move at a reduced speed, avoid the biopsy forceps from being inserted too long and too fast, and make the patient experience relatively comfortable and not easy to damage the gastrointestinal mucosa.

[0012] (2) The shell of the speed limiter is provided with a reset knob on one side; after use, the reset knob can be used to drive the cam to rotate to release the biopsy forceps, facilitate the biopsy forceps to be taken out, and prepare for the next use, which is simple to use and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective structural schematic view of the present application;

[0014] Figure 2 is an A-A sectional view of Figure 1 (figure cam is in unstarted state);

[0015] Figure 3 is a structural schematic view of the cam in Figure 2 in a pressed state;

[0016] Figure 4 is a front structural schematic view of the present application;

[0017] Figure 5 is a B-B sectional view of Figure 4 ;

[0018] Figure 6 is a perspective structural schematic view of the cam and the pressure wheel of the present application.

[0019] In the figure, 11. speed limiter housing, 111. containing groove, 112. biopsy forceps entrance, 1121. notch, 113. endoscopic biopsy channel interface, 12. cam, 121. cam shaft, 13. pressure roller, 131. limiting groove, 14. speed limiter support plate, 15. fixed support, 16. driving device, 17. sensor, 18. biopsy forceps, 181. speed limit mark, 19. reset knob. DETAILED DESCRIPTION

[0020] Embodiment one, an external biopsy channel speed limiter, see the description attached Figures 1-6 , including speed limiter housing 11, cam 12, pressure roller 13 and speed limiter support plate 14; the inside of the speed limiter housing 11 is provided with a containing groove 111, the outer port of the containing groove 111 is provided with a fixed support 15, the speed limiter support plate 14 is vertically fixedly connected to the inner side of the fixed support 15, the containing groove 111 slot at the upper end of the speed limiter support plate 14 is provided with a biopsy forceps entrance 112, and the containing groove 111 slot at the lower end is provided with an endoscopic biopsy channel interface 113, which is used to dock with the entrance of the endoscopic biopsy channel, the biopsy forceps entrance 112 and the endoscopic biopsy channel interface 113 are vertically opposite, the biopsy forceps 18 can pass through the biopsy forceps entrance 112 and the biopsy channel interface to enter the biopsy channel; the cam 12 is rotationally connected in the containing groove 111 through the cam shaft 121, two through holes are symmetrically provided on the two sides of the speed limiter housing 11, bearings are sleeved in the through holes, the two ends of the cam shaft 121 are sleeved into the bearings, one side of the speed limiter housing 11 is provided with a driving device 16, the output shaft of the driving device 16 is coaxially fixedly connected with the cam shaft 121, which is used to drive the cam 12 to rotate, the pressure roller 13 is rotationally connected to the protruding part of the cam 12, when the cam 12 rotates, the pressure roller 13 of the protruding part will swing, the rolling surface of the pressure roller 13 corresponds to the middle part of the speed limiter support plate 14; the containing groove 111 is provided with a sensor 17 at the upper port, a speed limit mark 181 is provided on the biopsy forceps 18, and a notch 1121 is provided on the inner side of the biopsy forceps entrance 112, the sensor 17 corresponds to the internal passage of the biopsy forceps entrance 112 through the notch 1121, the speed limit mark 181 is provided in bright color, such as red, and the sensor 17 is provided as a color sensor 17 capable of recognizing the red speed limit mark 181.

[0021] For example, the overall length of the endoscopic biopsy forceps 18 is 1025mm, if the biopsy forceps 18 is quickly stretched out of the tube of the endoscopic biopsy forceps 18 by more than 50mm, the mucosa is easily damaged, therefore, the embodiment sets the speed limit mark 181 at 975mm of the biopsy forceps 18, when the biopsy forceps 18 is stretched out of the tube by 50mm, the speed limit mark 181 can be exposed and recognized by the color sensor 17, the length of the speed limit mark 181 is set to 10mm.

[0022] The other side of the speed limiting shell is provided with a reset knob 19, which is coaxially fixedly connected with the cam 12, and after use, the reset knob 19 can be used to drive the cam 12 to rotate to release the biopsy forceps 18, so as to facilitate taking out the biopsy forceps 18 and prepare for next use.

[0023] The middle of the side of the pressing wheel 13 is provided with a limiting groove 131 with a V-shaped cross section in the circumferential direction, and the size of the limiting groove 131 matches the size of the biopsy forceps 18, the limiting groove 131 is used for clamping the biopsy forceps 18 and pressing the biopsy forceps 18 on the speed limiting support plate 14, and the biopsy forceps 18 can be provided with stable limiting support and is not easy to be misaligned.

[0024] The speed limiting support plate 14 is made of a material with large frictional resistance, and after the biopsy forceps 18 are pressed on the speed limiting support plate 14, the biopsy forceps 18 can be provided with strong frictional resistance.

[0025] The driving device 16 is a speed reducing motor, the color sensor 17 is connected with the controller of the speed reducing motor through a control module, after the color sensor 17 receives the color signal of the speed limiting mark 181, the signal is transmitted to the controller of the speed reducing motor, and the motor drives the cam 12 to rotate.

[0026] The use method and principle of the present application are as follows:

[0027] In the first step, the inner diameter biopsy channel interface at the lower end of the speed limiter is connected with the inlet of the endoscope biopsy channel, the biopsy forceps 18 are inserted from the biopsy forceps inlet 112 and closely enter the biopsy channel.

[0028] In the second step, when the biopsy forceps 18 are extended to a length close to 50mm, the red speed limiting mark 181 above the biopsy forceps 18 enters the gap 1121 of the biopsy forceps inlet 112, the color sensor 17 identifies the speed limiting mark 181 signal and sends the signal to the controller of the speed reducing motor, the speed reducing motor drives the cam 12 to rotate, the pressing wheel 13 on the cam 12 swings and presses the biopsy forceps 18 on the speed limiting support plate 14, so as to force the biopsy forceps 18 to move at a reduced speed, avoid the biopsy forceps 18 from being inserted too long and too fast, make the patient experience relatively comfortable, and avoid damaging the gastrointestinal mucosa.

Claims

1. An external biopsy channel speed limiter, characterized in that: it comprises a speed limiter housing, a cam, a pressure roller and a speed limiting support plate; the inside of the speed limiter housing is provided with a containing groove, and the outer port of the containing groove is provided with a fixed support; the speed limiting support plate is vertically fixedly connected to the inner side of the fixed support, the biopsy forceps inlet is arranged at the containing groove notch of the upper end of the speed limiting support plate, and the endoscopic biopsy channel interface is arranged at the containing groove notch of the lower end of the speed limiting support plate, the biopsy forceps inlet and the endoscopic biopsy channel interface are vertically opposite to each other; the cam is rotationally connected in the containing groove through a cam shaft, one side of the speed limiter housing is provided with a driving device, the output shaft of the driving device is coaxially fixedly connected with the cam shaft, and the pressure roller is rotationally connected to the protruding part of the cam, the rolling surface of the pressure roller corresponds to the middle part of the speed limiting support plate; a sensor is arranged at the upper port of the containing groove, the driving device is a speed reducer motor, the sensor is connected with the controller of the speed reducer motor through a control module, a speed limiting mark is arranged on the biopsy forceps, a notch is arranged on the inner side of the biopsy forceps inlet, and the sensor corresponds to the internal channel of the biopsy forceps inlet through the notch; the speed limiting mark signal is recognized by the sensor, and the signal is sent to the controller of the speed reducer motor, the speed reducer motor drives the cam to rotate, the pressure roller on the cam swings to press the biopsy forceps on the speed limiting support plate, and the biopsy forceps is forced to move at a reduced speed; the side surface of the pressure roller is provided with a limiting groove with a V-shaped cross section in the circumferential direction, and the size of the limiting groove matches the size of the biopsy forceps.

2. An external biopsy channel speed limiter according to claim 1, wherein: the other side of the speed limiter housing is provided with a reset knob, and the reset knob is coaxially fixedly connected with the cam.

3. An external biopsy channel speed limiter according to claim 1, wherein: the speed limiting support plate is made of a material with large frictional resistance.

4. The external biopsy channel speed limiter of claim 1, wherein: the speed limiting mark is bright in color, and the sensor is a color sensor.

Images