Uterine cavity distance measuring device

Abstract

The invention relates to the technical field of medical instruments, and discloses a uterine cavity distance measuring device which comprises an outer sleeve, an end seat, an external expansion rod and a camera, a balloon is installed at the bottom of the end seat, and a through groove and an installation groove are formed in one side and the middle of the interior of the outer sleeve respectively; when the fixing assembly slides out of the outer sleeve through the sliding assembly and is pushed into the uterine cavity, the two sets of external expansion rods in the first measuring rod piece are overturned outwards through the corresponding torsional springs, so that a certain included angle is formed between the two sets of external expansion rods, the lengths of the two sets of external expansion rods are certain, and when the external expansion rods rotate through the connecting shafts, the external expansion rods are fixed. The scale pointers connected with the outer ends of the connecting shafts can rotate on certain scale marks on the outer sides of the corresponding dials, so that after corresponding included angle values are read on the dials on the two sides, the distances between the two groups of external expansion rods and the measuring points in the uterine cavity can be quickly calculated through a trigonometric function, and the maximum span value in the uterine cavity can be quickly calculated.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a uterine cavity distance measuring device. Background Art

[0002] The uterine cavity ranging device is a medical device used to measure and evaluate the depth of the uterine cavity. It is of great significance for the diagnosis and treatment of gynecological diseases and precise operation during surgery.

[0003] For example, the Chinese patent authorization announcement number CN109480848A "discloses a uterine cavity measuring ruler, which includes a depth measuring rod, a first width measuring rod and a second width measuring rod are provided at the front end of the depth measuring rod; a first elastic connecting piece is provided between the first width measuring rod and the depth measuring rod, which can pull the first width measuring rod back to a state perpendicular to the depth measuring rod; a second elastic connecting piece is provided between the second width measuring rod and the depth measuring rod, which can pull the second width measuring rod back to a state perpendicular to the depth measuring rod; the first width measuring rod is perpendicular to the depth measuring rod, and the second width measuring rod is perpendicular to the depth measuring rod; the first width measuring rod and the second width measuring rod are located in the same plane; the outer surfaces of the depth measuring rod, the first width measuring rod and the second width measuring rod are all provided with scales"; In the above-mentioned comparative documents, the uterine cavity measuring ruler is used in conjunction with a hysteroscope to quickly and accurately measure the location of abnormal tissue in the uterine cavity, and has the advantages of easy operation, accurate measurement, and fast measurement speed.

[0004] However, when the above-mentioned uterine cavity measuring ruler is actually used, when the two sets of width measuring rulers and depth measuring rulers measure the width and depth of the uterine cavity, the two sets of width measuring rulers are inside the uterine cavity, which is not convenient for intuitively reading the values, resulting in that the span in the uterine cavity is not convenient for rapid measurement and calculation, and the two sets of width measuring rulers are equal in length. When measuring points on the irregular inner wall of the uterine cavity, the measurement data of the two sets of width measuring rulers cannot be adapted and adjusted, and the measurement value error is large. Summary of the invention

[0005] The purpose of the present invention is to provide a uterine cavity distance measuring device, which can realize fast and convenient reading of the values ​​of two sets of measuring rods in the uterine cavity, conveniently calculate the span in the uterine cavity, and for irregular inner wall measurement points in the uterine cavity, the two sets of measuring rulers cannot be adapted and adjusted, resulting in large measurement data errors.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a uterine cavity ranging device, comprising an outer sleeve, an end seat, an outward expansion rod, and a camera, a balloon ball is installed at the bottom of the end seat, a through groove and a mounting groove are respectively arranged on one side and the middle of the inner part of the outer sleeve, a through groove is opened at the top of the outer sleeve, the through groove is connected with the mounting groove, a fixing component is arranged inside the mounting groove, the fixing component includes a fixing seat slidably installed inside the mounting groove, air storage components are respectively arranged on both sides of the inner cavity of the end seat, a first measuring rod is arranged on the top of the fixing component, the first measuring rod includes two groups of symmetrically arranged outward expansion rods, second measuring rods are respectively arranged inside the first measuring rod, the second measuring rod includes an extension rod movably installed inside the outward expansion rod, the fixing component is used to assemble and position the first measuring rod, and the air storage component is used to telescopically position the second measuring rod.

[0007] Preferably, handles are integrally formed on both sides of the outer side of the outer sleeve, a guide groove is penetrated through one side of the outer periphery of the outer sleeve, a sliding component is arranged inside the through groove, the sliding component includes a tough belt slidably installed inside the through groove, a push block is slidably connected inside the guide groove, and the push block is fixedly connected to one side of the tough belt.

[0008] Preferably, an open groove is provided on the inner diameter of the through groove, a yield groove is provided on the side of the open groove close to the toughness band, and the guide groove is connected to the through groove.

[0009] Preferably, a cover assembly is provided inside the open groove near one side of the flexible band, the cover assembly includes an end cover, both ends of the flexible band are fixedly connected to the fixing seat and the bottom of the end cover respectively, and the end cover slides inside the give way groove.

[0010] Preferably, the air storage assembly includes a graduated air cylinder integrally formed on the outer circumference of the end seat, a connecting tube and an air guide tube are fixedly passed through the bottom and the top of the graduated air cylinder respectively, a first slide plate is slidably connected inside the graduated air cylinder, the connecting tube is connected to the balloon at one end away from the graduated air cylinder, and the air guide tube is connected to the inner cavity of the outer expansion rod at one end away from the graduated air cylinder.

[0011] Preferably, a dial and a scale pointer are respectively provided on both sides of the outside of the fixing seat, connecting shafts are rotatably installed on both sides of the inside of the fixing seat, two groups of the outward expansion rods are respectively fixedly sleeved on the corresponding connecting shafts, a torsion spring is fixedly installed between the side of the outward expansion rod and the inner wall of the fixing seat, a cavity is provided in the middle of the inner cavity of the outward expansion rod, and the end of the air guide tube away from the scale gas cylinder is connected to the cavity.

[0012] Preferably, the two groups of scale pointers are respectively rotatably mounted on the outer side of the fixing seat through end shafts, and the two groups of connecting shafts are respectively fixedly connected to the end shafts of the scale pointers at one end close to the inner wall of the fixing seat, and the scale pointers are respectively located on the outer sides of the corresponding dials.

[0013] Preferably, a through rod is fixedly installed at the bottom end of the extension rod, and a second slide is fixedly installed at the bottom end of the through rod. The second slide slides inside the cavity, and the through rod movably passes through the top opening of the outward expansion rod and extends into the inner cavity of the cavity. A return spring is fixedly installed between the top of the second slide and the top of the inner cavity of the cavity.

[0014] Preferably, a spherical plug is fixedly mounted on the top of the extension rod, the camera is fixedly mounted on the corresponding top of the spherical plug, and the spherical plug is located in the corresponding top opening of the outward expansion rod.

[0015] Preferably, the graduated gas cylinder is made of a visible glass material, and the connecting tube and the air guide tube are both corrugated structures.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention places the top end of the outer sleeve into the uterine cavity opening, and the camera at the end of the outer expansion rod can monitor the measurement span point in the uterine cavity in real time. By pushing the push block to slide downward in the guide groove, one end of the flexible belt drives the end cover at the top end of the outer sleeve to slide into the yield groove, and the other end of the flexible belt is pushed upward along the through groove, so that the fixed component and the first measuring rod and the second measuring rod extend from the outer sleeve into the uterine cavity, thereby realizing the protection of the measuring component in the uterine cavity distance measuring device, and preventing the outer sleeve end opening and the internal measuring component from being infected by external bacteria; In the present invention, when the fixing assembly slides out of the outer sleeve and is pushed into the uterine cavity through the sliding assembly, the two groups of outward expansion rods in the first measuring rod member are turned outward by the corresponding torsion springs, so that a certain angle is formed between the two groups of outward expansion rods, and the lengths of the two groups of outward expansion rods are constant. When the outward expansion rods rotate through the connecting shaft, the scale pointer connected to the outer end of the connecting shaft can rotate to a certain scale line on the outer side of the corresponding dial. In this way, after reading the corresponding angle values ​​on the dials on both sides, the distances between the two groups of outward expansion rods and the measuring points inside the uterine cavity can be quickly calculated by trigonometric functions, thereby realizing the rapid calculation of the maximum span value in the uterine cavity. When the two points with the maximum span in the uterine cavity are asymmetric in the present invention, two groups of outer expansion rods, the second measuring rod inside, and the camera enter the uterine cavity. By pressing the air bag on the outer sleeve, the gas in the air bag enters the graduated air cylinders on both sides of the outer sleeve through the connecting pipes respectively. The first slide plate in the graduated air cylinder is pushed upward from the zero scale line, and the gas in the graduated air cylinder enters the corresponding cavity of the outer expansion rod through the air guide pipe. The extension rod in the cavity is pushed and matched by the second slide plate and the return spring, so that the two groups of extension rods can extend from the inside of the outer expansion rod to the inner wall of the uterine cavity respectively. Until the two groups of extension rods are respectively in contact with the irregular uterine walls on both sides inside the uterine cavity, the positions of the corresponding scale lines where the first slide plates in the two groups of graduated air cylinders slide can be read respectively. In this way, the intuitive and accurate reading of the irregular measurement points in the uterine cavity is realized. Coupled with the established lengths and included angles of the two groups of outer expansion rods, the maximum span value of the irregular measurement points inside the uterine cavity can be accurately calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic three-dimensional structure diagram of the present invention; Figure 2 is a schematic front sectional structure diagram of the present invention; Figure 3 is a schematic side sectional structure diagram of the middle seat of the present invention; Figure 4 is a schematic structure diagram of the graduated air cylinder of the present invention; Figure 5 is a schematic structure diagram of the fixed seat of the present invention; Figure 6 is a schematic structure diagram of the flexible band of the present invention; Figure 7 is Figure 2 a partially enlarged structure diagram at position A in Figure 8 is Figure 3 a partially enlarged structure diagram at position B in Fig. 9 is Figure 5 a partially enlarged structure diagram at position C in

[0018] In the figure: 1. outer sleeve; 2. end seat; 3. balloon; 4. fixing assembly; 5. sliding assembly; 6. capping assembly; 7. gas storage assembly; 8. first measuring rod; 9. second measuring rod; 11. handle; 12. guide groove; 13. mounting groove; 14. through groove; 121. through groove; 122. clearance groove; 141. opening groove; 41. fixing seat; 42. dial; 43. scale pointer; 51. toughness band; 52. push block; 61. end cover; 71. scale cylinder; 72. connecting pipe; 73. first slide plate; 74. air guide tube; 81. expansion rod; 82. connecting shaft; 83. torsion spring; 84. cavity; 91. through rod; 92. reset spring; 93. second slide plate; 94. extension rod; 95. spherical plug; 951. camera. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Embodiment 1: This embodiment introduces a uterine cavity distance measuring device, such as Figure 1-Figure 3 As shown, a uterine cavity distance measuring device includes an outer sleeve 1, an end seat 2, an outer expansion rod 81, and a camera 951. A balloon 3 is installed at the bottom of the end seat 2. A through groove 121 and a mounting groove 13 are respectively arranged at one side and the middle of the inner part of the outer sleeve 1. A through groove 14 is opened at the top of the outer sleeve 1, and the through groove 14 is connected to the mounting groove 13. A fixing assembly 4 is arranged inside the installation groove 13, and the fixing assembly 4 includes a fixing seat 41 slidably installed inside the installation groove 13, and gas storage assemblies 7 are arranged on both sides of the inner cavity of the end seat 2, and a first measuring rod 8 is arranged on the top of the fixing assembly 4, and the first measuring rod 8 includes two groups of symmetrically arranged outward expansion rods 81; In this example, the top end of the outer sleeve 1 is placed in the uterine cavity opening, and the camera 951 at the end of the expansion rod 81 can monitor the measurement span point in the uterine cavity in real time. By pushing the push block 52 to slide downward in the guide groove 12, one end of the flexible band 51 drives the end cover 61 at the top end of the outer sleeve 1 to slide into the clearance groove 122, and the other end of the flexible band 51 is pushed upward along the through groove 121, so that the fixing component 4 and the first measuring rod 8 and the second measuring rod 9 extend from the outer sleeve 1 into the uterine cavity, thereby realizing the protection of the measuring component in the uterine cavity distance measuring device, and preventing the end opening of the outer sleeve 1 and the internal measuring component from being infected by external bacteria; In this example, when the fixing assembly 4 slides out of the outer sleeve 1 and is pushed into the uterine cavity through the sliding assembly 5, the two groups of outward expansion rods 81 in the first measuring rod 8 are turned outward by the corresponding torsion springs 83, so that a certain angle is formed between the two groups of outward expansion rods 81, and the lengths of the two groups of outward expansion rods 81 are constant. When the outward expansion rods 81 rotate through the connecting shaft 82, the scale pointer 43 connected to the outer end of the connecting shaft 82 can rotate to a certain scale line on the outside of the corresponding dial 42. In this way, after reading the corresponding angle values ​​on the dials 42 on both sides, the distance between the two groups of outward expansion rods 81 and the measuring point inside the uterine cavity can be quickly calculated by trigonometric functions, thereby realizing the rapid calculation of the maximum span value in the uterine cavity. Among them, handles 11 are integrally formed on both sides of the outer side of the outer sleeve 1, a guide groove 12 is penetrated on one side of the outer periphery of the outer sleeve 1, a sliding component 5 is arranged inside the through groove 121, and the sliding component 5 includes a tough belt 51 slidably installed inside the through groove 121, a push block 52 is slidably connected inside the guide groove 12, and the push block 52 is fixedly connected to one side of the tough belt 51, and is placed into the uterine cavity through the top end of the outer sleeve 1, and the push block 52 is pushed to slide downward in the guide groove 12, so that one end of the tough belt 51 drives the end cover 61 at the top end of the outer sleeve 1 to slide into the give way groove 122.

[0021] Among them, an opening groove 141 is opened on the inner diameter of the through groove 14, and a yield groove 122 is opened on the side of the opening groove 141 close to the flexible band 51. The guide groove 12 is connected with the through groove 121, and a cover assembly 6 is arranged inside the opening groove 141 close to the side of the flexible band 51. The cover assembly 6 includes an end cover 61. The two ends of the flexible band 51 are respectively fixedly connected to the fixing seat 41 and the bottom of the end cover 61. The end cover 61 slides inside the yield groove 122. By pushing the push block 52 in the sliding assembly 5 downward along the guide groove 12, one end of the flexible band 51 drives the end cover 61 at the top of the outer sleeve 1 to slide into the yield groove 122, and the other end of the flexible band 51 is pushed upward along the through groove 121, so that the fixing assembly 4 and the first measuring rod 8 and the second measuring rod 9 extend from the outer sleeve 1 into the uterine cavity, thereby realizing the protection of the measuring assembly in the uterine cavity ranging device.

[0022] Embodiment 2: Based on Example 1, this example introduces a uterine cavity distance measuring device, such as Figure 5-Figure 9 As shown, the first measuring rod 8 is provided with a second measuring rod 9, the second measuring rod 9 includes an extension rod 94 movably mounted inside the outer expansion rod 81, the fixing assembly 4 is used to assemble and position the first measuring rod 8, and the gas storage assembly 7 is used to telescopically position the second measuring rod 9; In this embodiment, when the two points of the maximum span in the uterine cavity are asymmetrical, the two sets of external expansion rods 81 and the second measuring rod 9 and the camera 951 inside enter the uterine cavity, and by pressing the balloon 3 on the outer tube 1, the gas in the balloon 3 enters the scale cylinder 71 on both sides of the outer tube 1 through the connecting tube 72, and is pushed upward from the zero scale line by the first slide 73 in the scale cylinder 71. The gas in the scale cylinder 71 enters the corresponding cavity 84 of the external expansion rod 81 through the air guide tube 74, and the extension rod 94 in the cavity 84 passes through the second The slide plate 93 and the reset spring 92 push and cooperate to allow the two groups of extension rods 94 to continue to extend from the inside of the external expansion rod 81 to the inner wall of the uterine cavity until the two groups of extension rods 94 respectively collide with the irregular uterine walls on both sides of the uterine cavity. The positions of the scale lines corresponding to the sliding of the first slide plate 73 in the two corresponding scale cylinders 71 can be read respectively. This achieves intuitive and accurate reading of irregular measurement points in the uterine cavity. Combined with the given lengths and angles of the two groups of external expansion rods 81, the maximum span value of the irregular measurement points inside the uterine cavity can be accurately calculated.

[0023] Among them, the air storage component 7 includes a graduated air cylinder 71 integrally formed on the outer circumference of the end seat 2, and a connecting tube 72 and an air guide tube 74 are fixedly passed through the bottom and the top of the graduated air cylinder 71 respectively, and a first slide plate 73 is slidably connected inside the graduated air cylinder 71, and the connecting tube 72 is connected to the balloon 3 at one end away from the graduated air cylinder 71, and the air guide tube 74 is connected to the inner cavity of the outward expansion rod 81 at one end away from the graduated air cylinder 71. When the two points of the maximum span in the uterine cavity are asymmetrical, two groups of outward expansion rods 81 and the internal second measuring rod 9 and camera 951 enter the uterine cavity, and by pressing the balloon 3 on the outer sleeve 1, the gas in the balloon 3 enters the graduated air cylinder 71 on both sides of the outer sleeve 1 through the connecting tube 72 respectively. After the two groups of extension rods 94 respectively collide with the irregular uterine walls on both sides of the inner side of the uterine cavity, the scale line positions corresponding to the sliding of the first slide plate 73 in the two corresponding graduated air cylinders 71 can be read respectively, thereby realizing intuitive and accurate reading of irregular measurement points in the uterine cavity.

[0024] Among them, a dial 42 and a scale pointer 43 are respectively arranged on both sides of the outside of the fixed seat 41, and a connecting shaft 82 is rotatably installed on both sides of the inside of the fixed seat 41. Two groups of outward expansion rods 81 are respectively fixedly sleeved on the corresponding connecting shafts 82, and a torsion spring 83 is fixedly installed between the side of the outward expansion rod 81 and the inner wall of the fixed seat 41. A cavity 84 is arranged in the middle of the inner cavity of the outward expansion rod 81, and the end of the air guide tube 74 away from the scale gas cylinder 71 is connected to the cavity 84. The two groups of scale pointers 43 are respectively rotatably installed on the outer surface of the fixed seat 41 through the end shaft, and the two groups of connecting shafts 82 are respectively fixedly connected to the end shaft of the scale pointer 43 near the inner wall of the fixed seat 41. Then, the scale pointers 43 are respectively located on the outer sides of the corresponding scale plates 42. When the sliding component 5 pushes the first measuring rod 8 in the fixed component 4 into the uterine cavity, the two groups of outward expansion rods 81 in the first measuring rod 8 are flipped outward by the corresponding torsion springs 83, so that a certain angle is formed between the two groups of outward expansion rods 81. The lengths of the two groups of outward expansion rods 81 are certain. When the outward expansion rods 81 rotate through the connecting shaft 82, the scale pointer 43 connected to the outer end of the connecting shaft 82 can rotate to a certain scale line on the outside of the corresponding scale plate 42, so that the angle between the two groups of outward expansion rods 81 and the perpendicular line of the outer sleeve 1 can be quickly and accurately read.

[0025] Among them, a through rod 91 is fixedly installed at the bottom end of the extension rod 94, and a second slide plate 93 is fixedly installed at the bottom end of the through rod 91. The second slide plate 93 slides inside the cavity 84, and the through rod 91 movably penetrates the top opening of the external expansion rod 81 and extends into the inner cavity of the cavity 84. A reset spring 92 is fixedly installed between the top of the second slide plate 93 and the top of the inner cavity of the cavity 84. A spherical plug 95 is fixedly installed on the top of the extension rod 94, and a camera 951 is fixedly installed on the top of the corresponding spherical plug 95. The spherical plug 95 is located in the corresponding top opening of the external expansion rod 81. The scale cylinder 71 is made of visual glass material, and the connecting tube 72 and the air guide tube 74 are both corrugated structures. When the two points of the maximum span in the uterine cavity are asymmetrical, the two groups of external expansion rods 81 and The internal second measuring rod 9 and camera 951 enter the uterine cavity, and by pressing the balloon 3 on the outer sleeve 1, the balloon 3 presses the gas into the two groups of visual scale cylinders 71. The gas in the scale cylinder 71 enters the corresponding cavity 84 of the outer expansion rod 81 through the air guide tube 74. The extension rod 94 in the cavity 84 is pushed and cooperated with the second slide plate 93 and the reset spring 92, so that the two groups of extension rods 94 can continue to extend from the inside of the outer expansion rod 81 to the inner wall of the uterine cavity, until the two groups of extension rods 94 respectively conflict with the irregular uterine walls on both sides of the inside of the uterine cavity, and then the scale line positions corresponding to the sliding of the first slide plate 73 in the two groups of corresponding scale cylinders 71 can be read respectively, thereby realizing intuitive and accurate reading of irregular measurement points in the uterine cavity.

[0026] Working principle: When measuring the end point of the span in the uterine cavity, first put the top end of the outer sleeve 1 into the uterine cavity opening, and push the push block 52 to slide downward in the guide groove 12, so that one end of the flexible belt 51 drives the end cover 61 at the top end of the outer sleeve 1 to slide into the clearance groove 122, and the other end of the flexible belt 51 is pushed upward along the through groove 121, so that the fixing assembly 4 and the first measuring rod 8 and the second measuring rod 9 extend from the outer sleeve 1 into the uterine cavity; Then, the two groups of outward expansion rods 81 in the first measuring rod 8 are turned outward by the corresponding torsion springs 83, so that a certain angle is formed between the two groups of outward expansion rods 81, and the lengths of the two groups of outward expansion rods 81 are constant. When the outward expansion rods 81 rotate through the connecting shaft 82, the scale pointer 43 connected to the outer end of the connecting shaft 82 can rotate to a certain scale line on the outer side of the corresponding scale plate 42. In this way, after reading the corresponding angle values ​​on the scale plates 42 on both sides, the distance between the two groups of outward expansion rods 81 and the measuring points inside the uterine cavity can be quickly calculated by trigonometric functions, thereby realizing the rapid calculation of the maximum span value in the uterine cavity. The camera 951 at the end of the outward expansion rod 81 can monitor the measuring span point in the uterine cavity in real time. Finally, when the two points of the maximum span in the uterine cavity are asymmetrical, the two sets of external expansion rods 81 and the second measuring rod 9 and the camera 951 inside enter the uterine cavity, and by pressing the balloon 3 on the outer tube 1, the gas in the balloon 3 enters the scale cylinder 71 on both sides of the outer tube 1 through the connecting tube 72, and is pushed upward from the zero scale line by the first slide 73 in the scale cylinder 71. The gas in the scale cylinder 71 enters the corresponding cavity 84 of the external expansion rod 81 through the air guide tube 74, and the extension rod 94 in the cavity 84 passes through the second slide 93 and the reset spring 92 push and cooperate, so that the two groups of extension rods 94 can continue to extend from the inside of the external expansion rod 81 to the inner wall of the uterine cavity, until the two groups of extension rods 94 respectively collide with the irregular uterine walls on both sides of the uterine cavity, and then the positions of the scale lines corresponding to the sliding of the first slide plate 73 in the two corresponding scale cylinders 71 can be read respectively, so that the irregular measuring points in the uterine cavity can be read intuitively and accurately, and the given lengths and angles of the two groups of external expansion rods 81 can accurately calculate the maximum span value of the irregular measuring points inside the uterine cavity.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.

Claims

1. A uterine cavity distance measuring device, comprising an outer sleeve (1), an end seat (2), an outward expansion rod (81), and a camera (951), characterized in that: A balloon (3) is installed at the bottom of the end seat (2); a through groove (121) and a mounting groove (13) are respectively provided at one side and the middle of the inner part of the outer sleeve (1); a through groove (14) is provided at the top of the outer sleeve (1); the through groove (14) is connected to the mounting groove (13); a fixing component (4) is provided inside the mounting groove (13); the fixing component (4) includes a fixing seat (41) slidably installed inside the mounting groove (13); and gas storage components (7) are respectively provided on both sides of the inner cavity of the end seat (2). ), a first measuring rod (8) is arranged at the top of the fixing assembly (4), the first measuring rod (8) comprises two groups of symmetrically arranged outward expansion rods (81), second measuring rods (9) are arranged inside the first measuring rods (8), the second measuring rods (9) comprise extension rods (94) movably mounted inside the outward expansion rods (81), the fixing assembly (4) is used to assemble and position the first measuring rod (8), and the gas storage assembly (7) is used to telescopically position the second measuring rod (9).

2. A uterine cavity distance measuring device according to claim 1, characterized in that: Handles (11) are integrally formed on both sides of the outer side of the outer sleeve (1), a guide groove (12) is formed through one side of the outer periphery of the outer sleeve (1), a sliding assembly (5) is arranged inside the through groove (121), and the sliding assembly (5) comprises a flexible band (51) slidably mounted inside the through groove (121), a push block (52) is slidably connected inside the guide groove (12), and the push block (52) is fixedly connected to one side of the flexible band (51).

3. A uterine cavity distance measuring device according to claim 2, characterized in that: An opening groove (141) is provided on the inner diameter of the through groove (14), a clearance groove (122) is provided on a side of the opening groove (141) close to the toughness band (51), and the guide groove (12) is connected to the through groove (121).

4. A uterine cavity distance measuring device according to claim 3, characterized in that: A cover assembly (6) is provided inside the opening groove (141) on one side close to the flexible band (51), the cover assembly (6) comprising an end cover (61), the two ends of the flexible band (51) are respectively fixedly connected to the fixing seat (41) and the bottom of the end cover (61), and the end cover (61) slides inside the clearance groove (122).

5. A uterine cavity distance measuring device according to claim 4, characterized in that: The gas storage assembly (7) comprises a graduated gas cylinder (71) integrally formed on the outer circumference of the end seat (2); a connecting tube (72) and an air guide tube (74) are fixedly penetrated through the bottom and the top of the graduated gas cylinder (71), respectively; a first slide plate (73) is slidably connected inside the graduated gas cylinder (71); an end of the connecting tube (72) away from the graduated gas cylinder (71) is connected to the balloon (3); and an end of the air guide tube (74) away from the graduated gas cylinder (71) is connected to the inner cavity of the outer expansion rod (81).

6. A uterine cavity distance measuring device according to claim 5, characterized in that: A scale plate (42) and a scale pointer (43) are respectively arranged on both sides of the exterior of the fixing seat (41); connecting shafts (82) are rotatably mounted on both sides of the interior of the fixing seat (41); two groups of the outward expansion rods (81) are respectively fixedly sleeved on the corresponding connecting shafts (82); a torsion spring (83) is fixedly mounted between the side surfaces of the outward expansion rods (81) and the inner wall of the fixing seat (41); a cavity (84) is arranged in the middle of the inner cavity of the outward expansion rods (81); and an end of the air guide tube (74) away from the scale air cylinder (71) is connected to the cavity (84).

7. A uterine cavity distance measuring device according to claim 6, characterized in that: The two groups of scale pointers (43) are respectively rotatably mounted on the outer surface of the fixing seat (41) via end shafts, and the two groups of connecting shafts (82) are respectively fixedly connected to the end shafts of the scale pointers (43) at one end close to the inner wall of the fixing seat (41), and the scale pointers (43) are respectively located on the outer surfaces of the corresponding scale plates (42).

8. A uterine cavity distance measuring device according to claim 7, characterized in that: A through rod (91) is fixedly mounted on the bottom end of the extension rod (94), and a second slide plate (93) is fixedly mounted on the bottom end of the through rod (91). The second slide plate (93) slides inside the cavity (84). The through rod (91) movably penetrates the top opening of the outward expansion rod (81) and extends into the inner cavity of the cavity (84). A return spring (92) is fixedly mounted between the top of the second slide plate (93) and the top of the inner cavity of the cavity (84).

9. A uterine cavity distance measuring device according to claim 8, characterized in that: A spherical plug (95) is fixedly mounted on the top of the extension rod (94), the camera (951) is fixedly mounted on the top of the corresponding spherical plug (95), and the spherical plug (95) is located in the top opening of the corresponding outward expansion rod (81).

10. A uterine cavity distance measuring device according to claim 9, characterized in that: The graduated gas cylinder (71) is made of a visible glass material, and the connecting tube (72) and the gas guide tube (74) are both corrugated structures.

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