Dry and hard excrement extractor for digestive department

Abstract

The invention relates to the technical field of tools for the digestive department, in particular to a dry and hard excrement extractor for the digestive department, which comprises a mounting box and a drill bit, and further comprises a guide assembly, a flow guide pipe, a driving mechanism, an elastic assembly and an expansion assembly, the flow guide pipe is arranged on the mounting box, connected with the guide assembly in a matched mode and used for conveying normal saline through the guide assembly and the drill bit, the driving mechanism is arranged in the mounting box and connected with the guide assembly in a matched mode, and the elastic assembly is arranged on the guide assembly. When the driving mechanism is powered on and started, the guiding assembly is driven to drive the drill bit to rotate, and dry and hard excrement is flexibly crushed through the elastic assembly. By means of the guiding assembly, the elastic assembly and the expansion assembly, the dry and hard excrement can be flexibly crushed on the basis of clamping the dry and hard excrement, the crushed dry and hard excrement is discharged, the taking-out effect is guaranteed, and meanwhile the discomfort of a patient can be reduced.

Description

Technical Field

[0001] This invention relates to the field of gastroenterology equipment technology, specifically a hard stool extractor for gastroenterology. Background Technology

[0002] Fecal impaction, in gastroenterological clinical practice, is defined as a pathological condition in which a large amount of hard, dry stool accumulates in the rectum or colon and cannot be expelled through voluntary defecation. The continuous pressure of hard, dry stool on the colonic mucosa triggers a series of serious pathophysiological reactions, requiring the assistance of medical personnel for removal.

[0003] Because hard, dry stool can obstruct the anus during expulsion, medical staff often remove it by hand. This not only causes physical discomfort for medical staff but also places significant psychological stress on patients. To address this issue, existing technologies offer better solutions. In the biomedical engineering industry, for example, a hard, dry stool removal device for gastroenterology (publication number CN209186851U) facilitates stool removal and collection while also collecting fluids flowing from the patient's anus, preventing fluids from flowing down the outer surface of the removal tube and contaminating the doctor's hands. This reduces both physical discomfort for medical staff and psychological stress on patients. However, the following drawbacks remain: due to the highly uneven texture of hard, dry stool, especially highly calcified or extremely dry fecal stones, manual tools alone cannot effectively break down the stool. Instead, the tools may slip on the surface of the hard, dry stool, affecting the removal process and further increasing patient discomfort.

[0004] Therefore, in order to solve the above problems, a dry and hard stool removal device for gastroenterology is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a stool extractor for gastroenterology, which solves the problem of tools slipping on the surface of hard stool, affecting the extraction effect and increasing patient discomfort. Through the design of guiding components, elastic components, and expanding components, the hard stool can be gently broken up while being held, and the broken-up hard stool can be discharged, ensuring extraction effectiveness while reducing patient discomfort.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for removing hard stool in the gastroenterology department includes a mounting box and a drill bit, as well as a guiding component, a guide tube, a drive mechanism, an elastic component, and an expansion component. The guiding component is disposed on the mounting box and connected to the drill bit. The guide tube is disposed on the mounting box and connected to the guiding component, and is used to deliver saline solution through the guiding component and the drill bit. The drive mechanism is disposed inside the mounting box and connected to the guiding component. The elastic component is disposed on the guiding component. When the drive mechanism is powered on, it drives the guiding component to rotate the drill bit and flexibly break up the hard stool through the elastic component. The expansion component is disposed on the elastic component and includes an expansion rod for expanding the anal opening. When the expansion rod expands, the elastic component drives the drill bit to approach the hard stool.

[0007] Preferably, the guiding assembly includes a first sleeve, a second sleeve, and a spiral blade. The first sleeve passes through the mounting box and is movably sleeved within the mounting box. The second sleeve is coaxial and movably sleeved inside the first sleeve. Both ends of the second sleeve are fixedly connected to the drill bit and the guide pipe, respectively. The spiral blade is fixedly and coaxially mounted on the second sleeve and located inside the first sleeve. The spiral direction of the spiral blade is opposite to the direction of the spiral groove on the drill bit. The driving mechanism includes a motor, a bevel gear, a bushing, a fixing plate, and a bevel gear ring. The top of the mounting box has an opening and the mounting plate is detachably mounted thereon. The motor is located inside the mounting box and is fixedly connected to the mounting plate. The bevel gear is fixedly mounted at the output end of the motor. The bushing is movably sleeved on the first sleeve and keyed to the first sleeve. The fixing plate is fixedly mounted inside the mounting box and rotatably sleeved with the bushing. The bevel gear ring is fixedly mounted on the bushing and meshes with the bevel gear.

[0008] It is known that hard, dry stool in the intestines, after being broken down, forms loose residue that remains in the intestines. Although negative pressure can be used to suction out this residue, it increases the airflow speed in the patient's intestines and makes it impossible to effectively control the negative pressure based on the patient's actual sensation, thus increasing discomfort. Therefore, this solution is adopted. By using a drill bit and a spiral blade, and utilizing the reverse arrangement of the spiral blade and the spiral groove on the drill bit, the loose residue can be discharged through the spiral blade during the process of the drill bit breaking down hard, dry stool, thereby shortening the removal time of hard, dry stool and reducing patient discomfort.

[0009] Preferably, the elastic component includes a first sleeve, a second sleeve, a bellows, a fixing block, a limiting block, a limiting rod, and a spring. Both the first sleeve and the second sleeve are movably sleeved on the first sleeve. The second sleeve is fixedly connected to the mounting box. The bellows is fixedly disposed between the first sleeve and the second sleeve and movably sleeved with the first sleeve. The fixing block is disposed on the inner wall of the first sleeve. The limiting block is disposed on the inner wall of the second sleeve. The limiting rod is fixedly disposed on the fixing block and movably sleeved with the limiting block. The spring is fixedly disposed between the fixing block and the limiting block and movably sleeved with the limiting rod.

[0010] It is known that, due to the presence of hardened stool, although it can be broken up with a drill, the stool may slip due to the pressure exerted by the drill as it advances, hindering the removal process and increasing patient discomfort by prolonging the removal time. Therefore, this solution is adopted. The spring and limiting rod enable a flexible connection between sleeve one and sleeve two. This allows the spring to retract when the drill is blocked by hardened stool during advancement, preventing the stool from sliding within the patient's intestines and effectively reducing patient discomfort.

[0011] Preferably, the expansion assembly further includes an externally threaded tube, a slider, an annular plate, and a hinged rod. The externally threaded tube is fixedly sleeved on the second sleeve, the slider is threadedly sleeved on the externally threaded tube, the annular plate is rotatably sleeved on the slider, the rear end of the expansion rod is hinged to the externally threaded tube, and the two ends of the hinged rod are respectively hinged to the expansion rod and the annular plate. A triangular block is fixedly installed on the expansion rod, with the inclined surface of the triangular block facing the externally threaded tube. When the rear end of the triangular block contacts the end of the first sleeve, the included angle between two adjacent expansion rods is an acute angle. When the inclined surface of the triangular block separates from the end of the first sleeve, the drill bit is located at the front end of the expansion rod.

[0012] By adopting the above scheme, the front end of the dilator can be easily inserted into the intestine through the anus before removing the patient's hard stool. With the cooperation of the slider and the hinge rod, multiple dilators can be used to widen the patient's anus, facilitating the removal of the hard stool from the intestine by medical personnel. Furthermore, when the extractor is not in use, the pressure of the inclined surface of the triangular block on one end of the sleeve compresses the spring, thus storing the drill bit among the multiple dilators and avoiding the risk of injury to medical personnel when handling the extractor. Simultaneously, when dilating the patient's anus with the dilator, the triangular block on the dilator gradually separates from the end of the sleeve, allowing the sleeve to move the drill bit out from between the multiple dilators under the action of the spring, so that the drill bit can directly contact the hard stool in the patient's intestine.

[0013] Preferably, the drill bit has an axial through hole that communicates with the interior of the casing. The guide tube includes an L-shaped fixed tube, a flexible tube, and a fixing rod. One end of the L-shaped fixed tube is rotatably connected to the casing. One end of the flexible tube is fixedly connected to the other end of the L-shaped fixed tube. The fixing rod is fixedly mounted on the mounting box and fixedly connected to the L-shaped fixed tube.

[0014] By adopting the above method, saline solution can be delivered to the surface of hard stool through the hose and through hole during the drilling process, thereby softening the contact surface between the hard stool and the drill bit and preventing the drill bit tip from slipping on the surface of the hard stool. This ensures the drill bit's ability to break up the hard stool while shortening the removal time and further reducing patient discomfort.

[0015] Preferably, the front end wall of the expansion rod has a groove, and the groove opening is oriented towards the front end of the external threaded tube.

[0016] By adopting the above scheme, after the dilator dilates the patient's anus, the grooves on its surface can increase the friction between the hard stool and the end of the dilator, further preventing the drill bit from pushing the hard stool to slide in the patient's intestines during the drilling process.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the expansion component, the linkage between the slider and the hinge rod allows the expansion rod to open the patient's anus, providing operating space for subsequent stool fragmentation. Especially in the initial stage of insertion, the triangular block at the front end of the expansion rod closes to form an acute angle structure, which not only facilitates insertion but also hides the sharp drill tip inside, effectively preventing the drill from accidentally injuring the intestinal wall or scratching the anus when the instrument enters the intestine, significantly reducing the operational risks for medical staff and the psychological stress on patients.

[0018] 2. Through the design of elastic components and guide tubes, "soft crushing" and anti-slip treatment are achieved for hard stools, improving the safety and effectiveness of crushing. When the drill bit comes into contact with hard stools or when the patient experiences intestinal peristalsis due to discomfort, the drill bit can automatically retract using the elasticity of the spring, avoiding rigid impact damage to the intestinal mucosa. At the same time, the guide tube, together with the internal through-hole of the drill bit, delivers physiological saline to the surface of the hard stools to soften them, ensuring that the drill bit can stably drill into and crush the stools, further reducing patient discomfort.

[0019] 3. The spiral blades are designed so that when the drill bit breaks up the stool, the spiral blades can quickly transport and discharge the broken pieces backward, avoiding the accumulation of debris that blocks the channel, thereby improving the extraction efficiency, effectively shortening the operation time, and further reducing the physiological discomfort caused to patients by prolonged operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the guide component, the guide tube, and the drive mechanism of the present invention. Figure 3 For the present invention Figure 2Enlarged view of part A in the middle section; Figure 4 This is a partial cross-sectional view of the connection structure between the mounting box and the elastic component of the present invention; Figure 5 This is a schematic diagram of a partial connection structure between the drill bit, casing, and expansion assembly of the present invention; Figure 6 For the present invention Figure 5 Side view; Figure 7 For the present invention Figure 6 Enlarged view of section B in the middle section.

[0021] In the diagram: 1. Mounting box; 11. Mounting plate; 2. Drill bit; 21. Through hole; 3. Guide assembly; 31. Sleeve 1; 32. Sleeve 2; 33. Spiral blade; 4. Guide tube; 41. L-shaped fixing tube; 42. Hose; 43. Fixing rod; 5. Drive mechanism; 51. Motor; 52. Bevel gear; 53. Bushing; 54. Fixing plate; 55. Bevel gear ring; 6. Elastic assembly; 61. Sleeve 1; 62. Sleeve 2; 63. Bellows; 64. Fixing block; 65. Limiting block; 66. Limiting rod; 67. Spring; 7. Expansion assembly; 71. Expansion rod; 711. Triangular block; 712. Slot; 72. External threaded tube; 73. Slider; 74. Annular plate; 75. Hinge rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 7 This invention provides a stool extractor for use in the gastroenterology department, the technical solution of which is as follows: For details, please refer to Figure 1 , Figure 2 and Figure 3A device for removing hard stools used in gastroenterology includes a mounting box 1 and a drill bit 2, as well as a guiding component 3, a guide tube 4, a drive mechanism 5, an elastic component 6, and an expansion component 7. The guiding component 3 is mounted on the mounting box 1 and connected to the drill bit 2. The guide tube 4 is mounted on the mounting box 1 and connected to the guiding component 3. The drive mechanism 5 is located inside the mounting box 1 and connected to the guiding component 3. The guiding component 3 includes a first sleeve 31, a second sleeve 32, and a spiral blade 33. The first sleeve 31 passes through the mounting box 1 and is movably sleeved on the mounting box 1. The second sleeve 32 is coaxial and movably sleeved inside the first sleeve 31. The two ends of the second sleeve 32 are fixedly connected to the drill bit 2 and the guide tube 4, respectively. The spiral blade 33 is fixed. The drive mechanism 5 is coaxially mounted on the second sleeve 32 and located inside the first sleeve 31. The spiral direction of the spiral blade 33 is opposite to the direction of the spiral groove on the drill bit 2. The drive mechanism 5 includes a motor 51, a bevel gear 52, a bushing 53, a fixing plate 54, and a bevel gear ring 55. The top of the mounting box 1 has an opening and a mounting plate 11 is detachably mounted thereon. The motor 51 is mounted inside the mounting box 1 and fixedly connected to the mounting plate 11. The bevel gear 52 is fixedly mounted on the output end of the motor 51. The bushing 53 is movably mounted on the first sleeve 31 and keyed to the first sleeve 31. The fixing plate 54 is fixedly mounted inside the mounting box 1 and rotatably mounted on the bushing 53. The bevel gear ring 55 is fixedly mounted on the bushing 53 and meshes with the bevel gear 52.

[0024] Under the above-mentioned conditions, when the motor 51 starts, its output end drives the bevel gear 55 to rotate through the meshing of the bevel gear 52 and the bevel ring 55. Since the bevel ring 55 is fixedly sleeved on the bushing 53 and the bushing 53 is keyed to the first sleeve 31, the bevel ring 55 drives the first sleeve 31 to rotate during the rotation. Since the second sleeve 32 is coaxially fixed inside the first sleeve 31 through the spiral blade 33 and fixedly connected to the drill bit 2, it can synchronously drive the drill bit 2 to rotate during the rotation of the first sleeve 31, so that the drill bit 2 can crush the end of the hard stool. The crushed debris can be transported in the opposite direction to the inside of the first sleeve 31 under the action of the spiral blade 33 until the debris is discharged to the outside of the first sleeve 31.

[0025] As one embodiment of the present invention, refer to Figure 1 and Figure 4The elastic component 6 includes a first sleeve 61, a second sleeve 62, a bellows 63, a fixing block 64, a limiting block 65, a limiting rod 66, and a spring 67. The first sleeve 61 and the second sleeve 62 are both movably sleeved on the first sleeve 31. The second sleeve 62 is fixedly connected to the mounting box 1. The bellows 63 is fixedly disposed between the first sleeve 61 and the second sleeve 62 and is movably sleeved with the first sleeve 31. The fixing block 64 is disposed on the inner wall of the first sleeve 61. The limiting block 65 is disposed on the inner wall of the second sleeve 62. The limiting rod 66 is fixedly disposed on the fixing block 64 and is movably sleeved with the limiting block 65. The spring 67 is fixedly disposed between the fixing block 64 and the limiting block 65 and is movably sleeved with the limiting rod 66.

[0026] Under the above-mentioned conditions, when the drill bit 2 is driven to rotate by the spiral blade 33 and the second sleeve 32 through the first sleeve 31, and the drill bit 2 is blocked by hard stool, the drill bit 2 will squeeze the first sleeve 61 in the opposite direction through the connection of the second sleeve 32, the spiral blade 33 and the first sleeve 31. During the rotation of the first sleeve 61, the fixed block 64 and the limiting rod 66 fixed on its inner wall will move synchronously, so that the fixed block 64 compresses the spring 67, providing reverse movement space for the drill bit 2, and preventing the drill bit 2 from pushing the hard stool to slide in the patient's intestines during the rotation.

[0027] As one embodiment of the present invention, refer to Figure 1 , Figure 5 , Figure 6 and Figure 7 The expansion assembly 7 also includes an external threaded tube 72, a slider 73, an annular plate 74, and a hinge rod 75. The external threaded tube 72 is fixedly sleeved on the sleeve 62, the slider 73 is threadedly sleeved on the external threaded tube 72, and the annular plate 74 is rotatably sleeved on the slider 73. The rear end of the expansion rod 71 is hinged to the external threaded tube 72. The two ends of the hinge rod 75 are respectively hinged to the expansion rod 71 and the annular plate 74. A triangular block 711 is fixedly installed on the expansion rod 71. The inclined surface of the triangular block 711 faces the external threaded tube 72. When the rear end of the triangular block 711 contacts the end of the sleeve 61, the included angle between two adjacent expansion rods 71 ​​is an acute angle. When the inclined surface of the triangular block 711 separates from the end of the sleeve 61, the drill bit 2 is located at the front end of the expansion rod 71. A groove 712 is opened on the front wall of the expansion rod 71. The groove opening of the groove 712 faces the front end of the external threaded tube 72.

[0028] Under the above-mentioned conditions, before removing hard stool from the patient's intestines, the tips of multiple dilators 71 can be smoothly inserted into the patient's anus. At this time, the slider 73 is rotated, and the slider 73, through its threaded connection with the external threaded tube 72, can drive the annular plate 74, which is rotated and sleeved on the external threaded tube 72, to move backward along the axial direction of the external threaded tube 72. When the annular plate 74 moves, under the action of the hinge rod 75, it will drive the corresponding dilator 71 to dilate the patient's anus. At the same time, the inclined surface of the triangular block 711 on the dilator 71 will gradually meet the sleeve 6. When the end of 1 separates, the spring 67, while resetting, presses the fixing block 64, causing the sleeve 61 to move forward. This allows the drill bit 2 to move out from between the multiple expansion rods 71, enabling the drill bit 2 to smoothly contact the end of the hard, dry stool. At this time, the slider 73 rotates in the opposite direction, causing the front ends of the multiple expansion rods 71 ​​to converge and clamp the hard, dry stool under the action of the slots 712 at the ends of the expansion rods 71. During this process, the inclined surface of the triangular block 711 is separated from the end of the sleeve 61, which does not affect the contact effect between the drill bit 2 and the hard, dry stool.

[0029] As one embodiment of the present invention, refer to Figure 2 and Figure 7 The drill bit 2 has an axial through hole 21 inside and is connected to the inside of the casing 32. The guide pipe 4 includes an L-shaped fixed pipe 41, a hose 42 and a fixing rod 43. One end of the L-shaped fixed pipe 41 is rotatably connected to the casing 32. One end of the hose 42 is fixedly connected to the other end of the L-shaped fixed pipe 41. The fixing rod 43 is fixedly installed on the mounting box 1 and fixedly connected to the L-shaped fixed pipe 41.

[0030] Under the above-mentioned conditions, when the drill bit 2 is performing a rotary operation, physiological saline is delivered through the hose 42. The physiological saline in the hose 42 enters the interior of the drill bit 2 under the action of the L-shaped fixed tube 41 and the second casing 32 and is discharged through the through hole 21, thereby achieving the softening effect on the hard stool so that the drill bit 2 can crush it.

[0031] Working principle: Before using the extractor, the acute-angle structure formed by the closed front ends of multiple dilators 71 is first inserted into the patient's anus. By rotating the slider 73, it moves axially on the external threaded tube 72. The slider 73 drives the rotating sleeved annular plate 74 and the hinge rod 75 to move, causing the multiple dilators 71 to expand outward to dilate the anal opening. At this time, the inclined surface of the triangular block 711 gradually separates from the end of the sleeve 61. The compressed spring 67 returns to its original state and squeezes the fixing block 64, causing the sleeve 61 to move forward. This allows the drill bit 2 to move out from between the multiple dilators 71 and come into contact with the hard stool. At the same time, the dilators 71 can be adjusted to increase the friction of the groove 712 on the front end of the rod to clamp the hard stool. Then, saline solution is delivered into the sleeve 32 through the hose 42 and the L-shaped fixing tube 41. The saline solution is discharged through the through hole 21 opened axially inside the drill bit 2 to the hard stool. The surface of the stool is softened; then the motor 51 is started. The motor 51 drives the bushing 53 and the sleeve 31 connected to it to rotate through the meshing of the bevel gear 52 and the bevel gear ring 55. The sleeve 31 drives the sleeve 32 and the drill bit 2 to rotate synchronously through the spiral blade 33 fixed inside, and drills and breaks up the softened hard stool. During this process, if the drill bit 2 is blocked by hard stool and generates great resistance, the drill bit 2 will squeeze the sleeve 61 in the opposite direction through the sleeve 32 and the spiral blade 33, so that the sleeve 61 compresses the bellows 63. At the same time, the fixing block 64 on the inner wall and the limiting block 65 on the inner wall of the sleeve 62 cooperate with the compression spring 67 to realize the automatic retraction of the drill bit 2 for flexible breaking. The stool debris generated by breaking is transported in the opposite direction to the inside of the sleeve 31 and discharged under the rotation of the spiral blade 33, thus completing the removal of hard stool.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for removing hard stools used in gastroenterology, comprising a mounting box (1) and a drill bit (2), characterized in that: It also includes a guide component (3), a guide tube (4), a drive mechanism (5), an elastic component (6), and an expansion component (7). The guide component (3) is mounted on the mounting box (1) and connected to the drill bit (2). The guide tube (4) is mounted on the mounting box (1) and connected to the guide component (3) for delivering saline solution through the guide component (3) and the drill bit (2). The drive mechanism (5) is mounted inside the mounting box (1) and connected to the guide component (3). The elastic component (6) is mounted on the guide component (3). When the drive mechanism (5) is powered on, it drives the guide component (3) to rotate the drill bit (2) and uses the elastic component (6) to gently break up the hard stool. The expansion component (7) is mounted on the elastic component (6) and includes an expansion rod (71) for expanding the anus. When the expansion rod (71) expands, the elastic component (6) drives the drill bit (2) to approach the hard stool.

2. The hard stool extractor for gastroenterology according to claim 1, characterized in that: The guiding component (3) includes a first casing (31), a second casing (32), and a spiral blade (33). The first casing (31) passes through the mounting box (1) and is movably sleeved with the mounting box (1). The second casing (32) is coaxial and movably sleeved inside the first casing (31). The two ends of the second casing (32) are fixedly connected to the drill bit (2) and the guide pipe (4) respectively. The spiral blade (33) is fixedly and coaxially set on the second casing (32) and located inside the first casing (31). The spiral direction of the spiral blade (33) is opposite to the direction of the spiral groove on the drill bit (2).

3. A hard stool extractor for gastroenterology according to claim 2, characterized in that: The elastic component (6) includes a first sleeve (61), a second sleeve (62), a bellows (63), a fixing block (64), a limiting block (65), a limiting rod (66), and a spring (67). The first sleeve (61) and the second sleeve (62) are both movably fitted onto the first sleeve (31). The second sleeve (62) is fixedly connected to the mounting box (1). The bellows (63) is fixedly disposed between the first sleeve (61) and the second sleeve (67). The fixed block (64) is located between the fixed block (64) and the sleeve (31), the limiting block (65) is located on the inner wall of the sleeve (61), the limiting rod (66) is fixedly located on the fixed block (64) and is movably connected to the limiting block (65), and the spring (67) is fixedly located between the fixed block (64) and the limiting block (65) and is movably connected to the limiting rod (66).

4. A hard stool extractor for gastroenterology according to claim 3, characterized in that: The expansion assembly (7) also includes an external threaded tube (72), a slider (73), an annular plate (74), and a hinge rod (75). The external threaded tube (72) is fixedly sleeved on the sleeve (62). The slider (73) is threadedly sleeved on the external threaded tube (72). The annular plate (74) is rotatably sleeved on the slider (73). The rear end of the expansion rod (71) is hinged to the external threaded tube (72). The two ends of the hinge rod (75) are respectively hinged to the expansion rod (71) and the annular plate (74).

5. A hard stool extractor for gastroenterology according to claim 3, characterized in that: A triangular block (711) is fixedly installed on the expansion rod (71). The inclined surface of the triangular block (711) faces the external threaded pipe (72). When the rear end of the triangular block (711) contacts the end of the sleeve (61), the included angle between two adjacent expansion rods (71) is an acute angle.

6. A hard stool extractor for gastroenterology according to claim 2, characterized in that: The drill bit (2) has an axial through hole (21) inside and is connected to the inside of the casing (32). The guide pipe (4) includes an L-shaped fixed pipe (41), a hose (42) and a fixing rod (43). One end of the L-shaped fixed pipe (41) is rotatably connected to the casing (32). One end of the hose (42) is fixedly connected to the other end of the L-shaped fixed pipe (41). The fixing rod (43) is fixedly installed on the mounting box (1) and fixedly connected to the L-shaped fixed pipe (41).

7. A hard stool extractor for gastroenterology according to claim 4, characterized in that: The front end of the expansion rod (71) has a groove (712) on its rod wall, and the groove (712) is set facing the front end of the external threaded tube (72).

8. A hard stool extractor for gastroenterology according to claim 5, characterized in that: When the inclined surface of the triangular block (711) separates from the end of the sleeve (61), the drill bit (2) is located at the front end of the expansion rod (71).

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