Knee bending posture keeping device for gastrointestinal endoscopy

Abstract

The utility model relates to the technical field of medical instruments, in particular to a knee bending posture keeping device for gastrointestinal endoscopy. The device comprises a back fixing mechanism, a leg fixing mechanism and a rotating mechanism, the rotating mechanism comprises a pair of connecting assemblies and a locking assembly; the connecting assembly comprises a U-shaped connecting piece, a rotating rod and a connecting rod; the locking assembly comprises a rotating gear, an outer gear, a limiting sub-assembly and a control sub-assembly. The control sub-assembly comprises a dust cover, a limiting sleeve, a guide rod, a rotating disc and a limiting clamping block. The limiting sub-assembly comprises a pushing column, a locking rod, a movable bottom plate and a reset spring. According to the device, the knee bending angle can be adjusted according to the flexibility of a patient, and the symptoms such as aching pain and cramp caused by the large knee bending angle are avoided as far as possible.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially, relates to a knee bending posture keeping device for gastroenterological examination. BACKGROUND

[0002] When the patient carries out gastroenterological detection, the posture that needs keeping patient's both knees together, both legs close to patient's back makes that patient's hip exposes outside, in order to facilitate gastroenterological detection.

[0003] To keep the knee bending posture of detection, the prior art device binds the back of the patient to the backrest plate, and places the legs of the patient on the placing roller, so that the patient forms a knee bending posture and maintains the knee bending posture. However, the following problems exist in actual operation process:

[0004] 1. Since the prior art device does not fix the legs of the patient, the patient's body may spread out when the patient is in pain or unconscious, thereby affecting the gastroenterological detection, and when the patient's body spreads out and the gastroenterological device is still in the patient's body, it is easy to cause damage to the patient;

[0005] 2. Some patients have different flexibility, and the prior art device cannot adjust the degree of knee bending of the patient according to the flexibility of different patients, which may cause symptoms such as soreness and muscle cramps due to excessive knee bending angle, and increase the discomfort of the patient;

[0006] 3. The prior art device cannot adjust the position of the binding belt according to the body shape of the patient when fixing the patient, so that there is a space between the binding belt and the body of the patient, so that the patient can move in the fixing assembly, and when the patient moves, it is easy to cause discomfort or damage due to friction and collision with the gastroenterological device. CONTENT OF THE UTILITY MODEL

[0007] In order to solve the above problems, the purpose of the utility model is to provide a knee bending posture keeping device for gastroenterological examination, which can adjust the angle of knee bending according to the flexibility of the patient, and avoid symptoms such as soreness and muscle cramps caused by excessive knee bending angle as much as possible.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] The application discloses a knee-bending posture maintaining device for gastrointestinal endoscopy, which comprises a back fixing mechanism, a leg fixing mechanism and a rotating mechanism arranged between the back fixing mechanism and the leg fixing mechanism and used for controlling the rotation of the leg fixing mechanism relative to the back fixing mechanism; the rotating mechanism comprises a pair of left-right symmetrical connecting assemblies arranged between the back fixing mechanism and the leg fixing mechanism and a locking assembly arranged on one of the connecting assemblies and used for controlling the locking or unlocking between the back fixing mechanism and the leg fixing mechanism; each connecting assembly comprises a U-shaped connecting piece fixed at the upper end of one side of the bottom of the back fixing mechanism, a rotating rod rotatably arranged in the opening end of the U-shaped connecting piece in the circumferential direction and a connecting rod fixedly sleeved on the outer side of the rotating rod and fixed at the lower end of the leg fixing mechanism; the locking assembly comprises a rotating shaft fixedly arranged at the corresponding side end of the rotating rod after penetrating through the opening end of the U-shaped connecting piece in the axial direction, a rotating gear fixedly sleeved on the rear end of the rotating shaft, an external gear rotatably arranged on the outer side wall of the U-shaped connecting piece and meshed with the rotating gear, a limiting subassembly movably arranged on the U-shaped connecting piece and used for limiting the external gear and a control subassembly arranged on the outer side of the U-shaped connecting piece and used for controlling the rotation of the external gear; the control subassembly comprises a dustproof cover arranged on one side of the U-shaped connecting piece and located outside the rotating gear and the external gear, a limiting sleeve fixedly arranged in the external gear, a guide rod movably penetrating through the dustproof cover and extending into the limiting sleeve, a rotating disc fixedly arranged at the rear end of the guide rod and a pair of limiting clamping blocks fixed at the two sides of the front end of the guide rod; a pair of limiting clamping grooves are arranged at the corresponding positions of the limiting sleeve and the limiting clamping blocks, respectively, and each limiting clamping block is inserted into the corresponding limiting clamping groove when the front end of the guide rod penetrates into the limiting sleeve; the limiting subassembly comprises a moving bottom plate vertically arranged in the U-shaped connecting rod, a return spring abutting against the moving bottom plate at the front end and abutting against the inner side wall of the U-shaped connecting piece at the rear end, a pushing column fixedly arranged at the front end of the moving bottom plate and extending into the limiting sleeve after penetrating through the U-shaped connecting piece at the rear end and a locking rod fixedly arranged at the front end of the moving bottom plate and clamped between the adjacent two gear teeth of the external gear after penetrating through the U-shaped connecting piece at the rear end; the front end of the rotating rod abuts against the rear end of the pushing column.

[0010] More preferably, the back fixing mechanism comprises a back rest abutting against the back of the patient, a pair of symmetrical slide rails embedded on the left and right sides of the front surface of the back rest, a pair of symmetrical slide blocks arranged on the left and right sides of the front surface of the back rest and respectively slidably matched with the corresponding slide rail, a fixing ring fixedly arranged on one of the slide blocks and a restraint belt with one end fixedly arranged on the other slide block; the outer surface of the restraint belt is provided with a hook surface at one end and a rough surface at the other end, and the movable end of the restraint belt is bonded with the fixed end of the restraint belt through the cooperation of the hook surface and the rough surface after penetrating through the fixing ring.

[0011] More preferably, the leg fixing mechanism comprises a leg rest abutting against the patient's leg, a mounting base slidingly arranged on the front side of the leg rest along the length direction of the leg rest, a pair of elastic bands symmetrically fixed on the left and right sides of the front side of the mounting base, and a buckle assembly arranged on the movable ends of the two elastic bands and used to realize the fixed connection of the two elastic bands.

[0012] More preferably, the buckle assembly comprises a first connecting buckle fixed on the movable end of one of the elastic bands and a second connecting buckle fixed on the movable end of the other elastic band and matched with the first connecting buckle to realize the fixation.

[0013] The utility model has the following beneficial effects:

[0014] 1、 the utility model discloses when pressing the rotary disc to the limit sleeve, the rotary disc drives the guide rod, limit sleeve rotation to drive the external gear and the rotation gear rotation, realize the rotation of leg fixing mechanism relative to the back fixing mechanism, and the back of the patient is fixed on the back fixing mechanism, and the leg is fixed on the leg fixing mechanism, so that the patient's legs are close to the chest of the patient, complete the knee bending posture, and the patient is convenient for the examination of gastroenterology, and after completing the setting of the posture, the pressing of the rotary disc is loosened, and under the action of the reset spring, the moving plate drives the push column and the locking rod to move to the one side of the external gear, so that the locking rod extends to the one side of the external gear and limits the rotation of the external gear, realizes the fixation between the leg fixing mechanism and the back fixing mechanism, thereby ensuring that the patient maintains the knee bending posture in the gastroenterology detection, avoids the patient to unfold the body when the gastroenterology detection is detected unconsciously or in pain, thereby affecting the detection of gastroenterology, and also avoids the damage to the patient when the patient unfolds the body and the gastroenterology remains in the patient's body, improves the safety of the device.

[0015] 2、 the utility model discloses can according to the flexibility (i.e. the knee bending angle) of patient through the amplitude of rotary disc rotation to the angle between the back fixing mechanism and the leg fixing mechanism is adjusted, avoids the symptom such as sore, muscle cramp as far as possible when the patient's leg and body close distance is close when the flexibility of patient is poor, thereby reduces the discomfort of patient.

[0016] 3、The utility model discloses through the restraint belt and fixed ring are equipped on two respectively along the corresponding side slide rail sliding slider respectively, make when being fixed to the patient, can the distance between restraint belt fixed end and fixed ring is adjusted to the body type of patient automatically, to reduce the possibility that patient shakes in restraint belt, and through the mounting seat along the leg rest transverse movement, can the fixed end position of elastic bandage is adjusted according to the body type of patient and the position of patient leg on the leg rest, can improve the firm degree of elastic bandage when being fixed to the leg of patient, reduce the possibility that patient leg shakes in elastic bandage, both can reduce when patient shakes and gastrointestinal mirror device rub, the discomfort even damage caused by collision, thereby the security degree and the comfort degree of patient when gastrointestinal mirror detects. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the front view of keeping device schematic diagram;

[0018] Figure 2 It is the structure amplification of A place Figure 1 (locking state);

[0019] Figure 3 It is the structure amplification of A place Figure 2 (rotation state);

[0020] Figure 4 It is the schematic diagram of external gear and rotation gear cooperation;

[0021] Figure 5 It is the schematic diagram of keeping device use Figure 1 ;

[0022] Figure 6 It is the schematic diagram of keeping device use Figure 2 .

[0023] BRIEF DESCRIPTION OF DRAWINGS:

[0024] 1, back fixing mechanism;11, back rest;12, slide rail;13, slider;14, fixed ring;15, restraint belt;151, hook face;152, nap surface;2, leg fixing mechanism;21, leg rest;22, elastic bandage;23, buckle assembly;231, first connecting buckle;232, second connecting buckle;24, mounting seat;3, rotation mechanism;31, connecting assembly;311, U-shaped connecting piece;312, rotation rod;313, connecting rod;32, locking assembly;321, rotation gear;322, external gear;323, limit subassembly;3231, push column;3232, lock rod;3233, moving base plate;3234, reset spring;324, control subassembly;3241, dust cover;3242, limit sleeve;32421, limit clamping groove;3243, guide rod;3244, rotation disc;3245, limit clamping block;325, rotation shaft. DETAILED DESCRIPTION

[0025] The utility model will be made further detailed explanation below combining with the specific embodiment

[0026] A knee-bent posture maintenance device for gastrointestinal endoscopy includes a back fixation mechanism 1, a leg fixation mechanism 2, and a rotation mechanism 3 disposed between the back fixation mechanism 1 and the leg fixation mechanism 2 for controlling the rotation of the leg fixation mechanism 2 relative to the back fixation mechanism 1. The rotation mechanism 3 includes a pair of symmetrically arranged connecting components 31 between the back fixation mechanism 1 and the leg fixation mechanism 2, and a locking component 32 disposed on one of the connecting components 31 for controlling the locking or unlocking of the back fixation mechanism 1 and the leg fixation mechanism 2. Each connecting component 31 includes a U-shaped connector 311 whose upper end is fixed to one side of the bottom of the back fixation mechanism 1, and a U-shaped connector 311 rotatably inserted circumferentially. The U-shaped connector 311 includes a rotating rod 312 inside the opening end and a connecting rod 313 fixedly sleeved on the outside of the rotating rod 312 and fixed to the leg fixing mechanism 2 at the bottom. The locking assembly 32 includes a rotating shaft 325 whose front end passes through the opening end of the U-shaped connector 311 and is axially fixed to the corresponding side end of the rotating rod 312; a rotating gear 321 fixedly sleeved on the rear end of the rotating shaft 325; an external gear 322 rotatably disposed on the outer wall of the U-shaped connector 311 and meshing with the rotating gear 321; a limiting sub-assembly 323 movably passing through the U-shaped connector 311 and used to limit the external gear 322; and a control sub-assembly disposed on the outside of the U-shaped connector 311 and used to control the rotation of the external gear 322. 324; The control sub-assembly 324 includes a dust cover 3241 covering one side of the U-shaped connector 311 and located outside the rotating gear 321 and the external gear 322, a limiting sleeve 3242 fixed inside the external gear 322, a guide rod 3243 whose front end moves through the dust cover 3241 and extends into the limiting sleeve 3242, a rotating disk 3244 fixed to the rear end of the guide rod 3243, and a pair of limiting blocks 3245 fixed on both sides of the front end of the guide rod 3243; The limiting sleeve 3242 is provided with a pair of limiting slots 32421 corresponding to the positions of each limiting block 3245. When the front part of the guide rod 3243 enters the limiting sleeve 3242, each limiting block 3245 will move when the guide rod 3243 moves through the limiting sleeve 3242. 245 is inserted into the corresponding limiting slot 32421; the limiting sub-assembly 323 includes a movable base plate 3233 vertically arranged inside the U-shaped connecting rod 313, a return spring 3234 whose front end abuts against the movable base plate 3233 and whose rear end abuts against the inner side wall of the U-shaped connector 311, a push column 3231 whose front end is fixed on the movable base plate 3233 and whose rear end passes through the U-shaped connector 311 and extends into the limiting sleeve 3242, and a locking rod 3232 whose front end is fixed on the movable base plate 3233 and whose rear end passes through the U-shaped connector 311 and is locked between two adjacent teeth of the external gear 322; the front end of the rotating rod 312 abuts against the rear end of the push column 3231.

[0027] When the rotating disc 3244 is pressed into the limiting sleeve 3242, the rotating disc 3244 drives the guide rod 3243 and the limiting sleeve 3242 to rotate, thereby driving the outer gear 322 and the rotating gear 321 to rotate, so as to realize the rotation of the leg fixing mechanism 2 relative to the back fixing mechanism 1, while the back of the patient is fixed on the back fixing mechanism 1 and the legs are fixed on the leg fixing mechanism 2, so that the patient's legs are close to the patient's chest, and the knee bending posture is completed, which is convenient for the patient to perform the gastrointestinal mirror examination; after the posture is set, the pressing on the rotating disc 3244 is released, and under the action of the reset spring 3234, the moving plate 3233 drives the pushing column 3231 and the locking rod 3232 to move to one side of the outer gear 322, so that the locking rod 3232 extends to one side of the outer gear 322 to limit the rotation of the outer gear 322, so as to realize the fixation between the leg fixing mechanism 2 and the back fixing mechanism 1, thereby ensuring that the patient maintains the knee bending posture during the gastrointestinal mirror detection, avoiding the patient to spread the body when the patient is unconscious or in pain during the gastrointestinal mirror detection, thereby affecting the detection of the gastrointestinal mirror, and also avoiding the damage to the patient when the patient spreads the body while the gastrointestinal mirror is still in the patient's body, thereby improving the safety of the device; in the device, the flexibility of the patient can adjust the angle between the back fixing mechanism 1 and the leg fixing mechanism 2 by the rotation range of the rotating disc 3244, so as to avoid the pain, cramps and other symptoms caused by the close distance between the patient's legs and the body when the patient's flexibility is poor, thereby reducing the discomfort of the patient.

[0028] As a possible embodiment of the present scheme, preferably, the back fixing mechanism 1 comprises a back rest 11 abutting against the back of the patient, a pair of symmetrical slide rails 12 embedded in the left and right sides of the front surface of the back rest 11, a pair of symmetrical slide blocks 13 provided on the left and right sides of the front surface of the back rest 11 and respectively slidingly matched with the corresponding slide rail 12, a fixing ring 14 fixed on one of the slide blocks 13, and a restraint belt 15 with one end fixed on the other slide block 13; the outer surface of the restraint belt 15 is provided with a hook surface 151 at one end and a rough surface 152 at the other end, and the movable end of the restraint belt 15 is bonded with the fixed end of the restraint belt 15 through the cooperation of the hook surface 151 and the rough surface 152 after passing through the fixing ring 14; the cooperation of the restraint belt 15 and the fixing ring 14 can realize the fixation of the back of the patient, and the restraint belt 15 and the fixing ring 14 are respectively arranged on the two slide blocks 13 which respectively slide along the corresponding slide rail 12, so that when the patient is fixed, the distance between the fixed end of the restraint belt 15 and the fixing ring 14 can be automatically adjusted according to the body shape of the patient, thereby reducing the possibility of the patient shaking in the restraint belt 15, and reducing the discomfort or even injury caused by the friction and collision between the patient and the gastrointestinal mirror device when the patient shakes, thereby improving the safety degree during the gastrointestinal mirror detection and the comfort of the patient.

[0029] As a possible implementation of this solution, preferably, the leg fixation mechanism 2 includes a leg support plate 21 that abuts against the patient's leg, a mounting seat 24 that slides along the length of the leg support plate 21 on the front side of the leg support plate 21, a pair of elastic straps 22 that are symmetrically fixed on the left and right sides of the front side of the mounting seat 24, and a fastening assembly 23 that is located at the movable ends of the two elastic straps 22 and used to fix the two elastic straps 22 together. By moving the mounting seat 24 laterally along the leg support plate 21, the fixed end position of the elastic straps 22 can be adjusted according to the patient's body shape and the position of the patient's leg on the leg support plate 21. This can improve the firmness of the elastic straps 22 when fixing the patient's leg, reduce the possibility of the patient's leg shaking within the elastic straps 22, thereby reducing discomfort or even damage caused by friction or collision between the patient and the endoscope device when the patient shakes, thus improving the safety of the endoscope examination and the patient's comfort.

[0030] As a possible implementation of this solution, preferably, the fastening assembly 23 includes a first connecting buckle 231 fixed to the movable end of one of the elastic straps 22 and a second connecting buckle 232 fixed to the movable end of the other elastic strap 22 and cooperating with the first connecting buckle 231 to achieve fixation; the two elastic straps 22 can be fixed by the cooperation of the first connecting buckle 231 and the second connecting buckle 232 to achieve restraint on the patient's leg.

[0031] The working principle of this device is as follows:

[0032] First, place the device flat on the bed so that the backrest 11 and legrest 21 are in contact with the bed. Then, have the patient lie on their back on the bed so that the patient's back is in contact with the backrest 11 and the legs are in contact with the legrest 21. At this time, the patient's lower back, buttocks and upper thighs are all located between the two connecting components 31.

[0033] The second step involves having the patient pass the movable end of the restraint strap 15 through the fixing ring 14 and then fasten it back, so that the restraint strap 15 restrains the patient within the space formed by the backrest 11, the two sliders 13, and the restraint strap 15. At this time, the two sliders 13 slide along the slide rail 12 to both sides of the patient's back as the restraint strap 15 moves. The mounting base 24 is then slid between the patient's legs, and then the two elastic straps 22 are wrapped around the outside of the patient's legs from below to above the legs. The two elastic straps 22 are fixed by the cooperation of the first connecting buckle 231 and the second connecting buckle 232, so that the patient's legs are within the space formed by the two elastic straps 22.

[0034] Third step, rotate the patient and device to the lateral decubitus position. At this time, the two sliders 13 and the mounting base 24 slide accordingly, and the locking component 32 rotates to the top.

[0035] Fourth step, press down the rotating disc 3244, so that the guide rod 3243 push the push column 3231 moves to the U-shaped connecting piece 311 (that is, the limit sleeve 3242 outside), at this time each limit block 3245 inserted in the corresponding limit card slot 32421 inside, while the locking rod 3232 with the U-shaped connecting piece 311, so that the outer gear 322 disengaged from the limit of the locking rod 3232, then rotate the rotating disc 3244, so that the outer gear 322 drive rotating gear 321 rotation, thereby with the rotating rod 312 axial fixed shaft 315 drive leg back plate 21 and back plate 11 rotation, when the appropriate angle after the release of the press on the rotating disc 3244, at this time in the reset spring 3234, the moving plate 3233 drive locking rod 3232 and push column 3231 to the guide rod 3243 side, on the one hand, the push column 3231 will be pushed to the guide rod 3243 limit sleeve 3242 outside, at this time each limit block 3245 in the corresponding limit card slot 32421 inside to the outside, on the other hand, the locking rod 3232 extends to the U-shaped connecting piece 311 outside the outer gear 322 side, so as to realize the locking of the outer gear 322, so as to realize the fixation of the patient's knee posture, in order to facilitate the detection of gastrointestinal mirror;

[0036] Fifth step, when the patient completes the detection, press the rotating disc 3244 reverse rotation, until the back plate 11 and leg plate 21 keep horizontal, then the patient and the device is rotated to the back plate 11 and bed abutment position, then the restraint belt 15 and elastic band 22 can be released.

[0037] The above only for the specific implementation of the present application, not therefore limit the patent range of the present application, any equivalent structure transformation using the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A knee flexion position maintaining device for gastrointestinal endoscopy, characterized by: The back fixing mechanism (1), the leg fixing mechanism (2) and the rotating mechanism (3) arranged between the back fixing mechanism (1) and the leg fixing mechanism (2) and used for controlling the rotation of the leg fixing mechanism (2) relative to the back fixing mechanism (1); The rotating mechanism (3) comprises a pair of left and right symmetrical connecting assemblies (31) arranged between the back fixing mechanism (1) and the leg fixing mechanism (2) and a locking assembly (32) arranged on one of the connecting assemblies (31) and used for controlling the locking or unlocking between the back fixing mechanism (1) and the leg fixing mechanism (2); Each connecting assembly (31) comprises a U-shaped connecting piece (311) fixed at the bottom of one side of the back fixing mechanism (1), a rotating rod (312) rotatably arranged in the opening end of the U-shaped connecting piece (311) and a connecting rod (313) fixed on the outside of the rotating rod (312) and at the bottom of the leg fixing mechanism (2); The locking assembly (32) comprises a rotating shaft (325) fixed on the corresponding side end of the rotating rod (312) after penetrating through the opening end of the U-shaped connecting piece (311), a rotating gear (321) fixed on the rear end of the rotating shaft (325), an external gear (322) rotatably arranged on the outer wall of the U-shaped connecting piece (311) and engaged with the rotating gear (321), a limiting subassembly (323) movably arranged on the U-shaped connecting piece (311) and used for limiting the external gear (322), and a control subassembly (324) arranged on the outside of the U-shaped connecting piece (311) and used for controlling the rotation of the external gear (322); The control subassembly (324) comprises a dust cover (3241) arranged on one side of the U-shaped connecting piece (311) and located outside the rotating gear (321) and the external gear (322), a limiting sleeve (3242) fixed in the external gear (322), a guide rod (3243) movably penetrating through the dust cover (3241) and extending into the limiting sleeve (3242), a rotating disc (3244) fixed on the rear end of the guide rod (3243), and a pair of limiting blocks (3245) fixed on the two sides of the front end of the guide rod (3243); The limiting sleeve (3242) is provided with a pair of limiting grooves (32421) corresponding to the positions of the limiting blocks (3245), and when the front end of the guide rod (3243) penetrates into the limiting sleeve (3242), the limiting blocks (3245) are inserted into the corresponding limiting grooves (32421); The limiting subassembly (323) comprises a moving bottom plate (3233) vertically arranged inside the U-shaped connecting rod (313), a reset spring (3234) with a front end abutting on the moving bottom plate (3233) and a rear end abutting on the inner side wall of the U-shaped connecting piece (311), a pushing column (3231) with a front end fixed on the moving bottom plate (3233) and a rear end extending into the limiting sleeve (3242) through the U-shaped connecting piece (311), and a locking rod (3232) with a front end fixed on the moving bottom plate (3233) and a rear end clamped between two adjacent gear teeth of the outer gear (322) through the U-shaped connecting piece (311); the front end of the rotating rod (312) abuts against the rear end of the pushing column (3231).

2. The knee flexion position maintaining device for gastrointestinal examination according to claim 1, characterized in that: The back fixing mechanism (1) comprises a back rest (11) abutting against the back of a patient, a pair of symmetrical slide rails (12) embedded in the left and right sides of the front surface of the back rest (11), a pair of symmetrical slide blocks (13) provided on the left and right sides of the front surface of the back rest (11) and respectively in sliding cooperation with the corresponding slide rail (12), a fixing ring (14) fixed on one of the slide blocks (13), and a restraint belt (15) with one end fixed on the other slide block (13). The restraint belt (15) is provided with a hook surface (151) at one end of the outer surface and a fuzzy surface (152) at the other end, and the movable end of the restraint belt (15) is bonded with the fixed end of the restraint belt (15) through the cooperation of the hook surface (151) and the fuzzy surface (152) after passing through the fixing ring (14).

3. The knee flexion position maintaining device for gastrointestinal examination according to claim 1, characterized in that: The leg fixing mechanism (2) comprises a leg rest (21) abutting against the legs of a patient, a mounting seat (24) slidingly arranged on the front side of the leg rest (21) along the length direction of the leg rest (21), a pair of symmetrical elastic bands (22) fixed on the left and right sides of the front side of the mounting seat (24), and a buckle assembly (23) provided at the movable end of the two elastic bands (22) and used to realize the fixed connection of the two elastic bands (22).

4. The knee flexion position maintaining device for gastrointestinal examination according to claim 3, characterized in that: The buckle assembly (23) comprises a first connecting buckle (231) fixed on the movable end of one of the elastic bands (22), and a second connecting buckle (232) fixed on the movable end of the other elastic band (22) and cooperating with the first connecting buckle (231) to realize fixation.

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