A balloon sleeve expansion and fixing device for a urinary catheter

Abstract

The present invention discloses a balloon sleeve expansion and fixing device for a urinary catheter, comprising: a base, an expansion mechanism and a fixing mechanism. The expansion mechanism is movably mounted on the base and comprises a first driving unit and an expansion unit, the expansion unit comprises at least three expansion arms, the first driving unit can drive at least three expansion arms to move to expand the balloon sleeve; the fixing mechanism is movably mounted on the base and comprises a second driving unit and a fixing unit, the fixing unit comprises at least three fixing arms, the fixing arms are parallel to the expansion arms and are arranged face to face, the second driving unit can drive at least three fixing arms to move to clamp and fix the expanded balloon sleeve on the drainage tube. Through this technical solution, when the expansion arm releases the balloon sleeve, the balloon sleeve is still in a state of being clamped and fixed by the fixing arm, so that the balloon sleeve is not easily pulled by the expansion arm coming out, and the position error of the balloon sleeve after being sleeved on the drainage tube can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cannula machines, in particular to a balloon cannula expansion and fixing device for a urinary catheter. Background Art

[0002] A urinary catheter is mainly used to discharge urine from the body. It is of great help to people with physical disabilities and incontinence, and is widely used in current medicine. A urinary catheter is a tube made of rubber, silicone or plastic that can be inserted into the bladder through the urethra to drain urine. The urinary catheter mainly includes an airbag sleeve and a drainage tube. After the urinary catheter is inserted into the bladder, the airbag sleeve near the head of the urinary catheter is inflated to expand the airbag sleeve and then the urinary catheter is stuck in the bladder and is not easy to fall out. In the prior art, the airbag sleeve is mainly opened manually, inserted into the drainage tube, and then relaxed to connect the two. During the relaxation process, the position of the airbag sleeve relative to the drainage tube will be offset, resulting in a large assembly error with the drainage tube, which can easily lead to defective finished products. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a balloon sleeve expansion and fixing device for a urinary catheter, which can expand the balloon sleeve and clamp and fix the expanded balloon sleeve on the drainage tube.

[0004] The embodiment of the present invention discloses a balloon sleeve expansion and fixing device for a urinary catheter, comprising: a base; an expansion mechanism, movably mounted on the base, the expansion mechanism comprising a first drive unit and an expansion unit, the expansion unit comprising at least three expansion arms, the first drive unit being capable of driving at least three expansion arms to move to expand the balloon sleeve; a fixing mechanism, movably mounted on the base, the fixing mechanism comprising a second drive unit and a fixing unit, the fixing unit comprising at least three fixing arms, the fixing arms being parallel to the expansion arms and being arranged face to face, the second drive unit being capable of driving at least three fixing arms to move to clamp and fix the expanded balloon sleeve on the drainage tube of the urinary catheter.

[0005] According to an embodiment of the present invention, a balloon sleeve expansion and fixing device for a urinary catheter has at least the following beneficial effects: a first driving unit is provided to drive the expansion arm to move to expand the balloon sleeve, and then a second driving unit is provided to drive the fixing arm to move to clamp and fix the expanded balloon sleeve on the drainage tube of the urinary catheter; when the expansion arm releases the balloon sleeve, the balloon sleeve is still in a clamped and fixed state, thereby reducing the position error of the balloon sleeve after it is sleeved on the drainage tube.

[0006] According to some embodiments of the present invention, the first driving unit includes a first mounting plate, a first driving member and a first transmission unit, the first mounting plate is movably arranged on the base, the first driving member and the first transmission unit are both mounted on the first mounting plate, the spreading arm is connected to the first transmission unit, and the first driving member can drive at least three spreading arms to slide closer to or away from each other on the first mounting plate through the first transmission unit. By setting the first driving unit as the first mounting plate, the first driving member and the first transmission unit, the first driving member can simultaneously control at least three spreading arms to slide closer to or away from each other on the first mounting plate through the first transmission unit, thereby completing the steps of spreading and releasing the airbag cover, and the position error of the spreading and releasing airbag cover process is small and the efficiency is high.

[0007] According to some embodiments of the present invention, the first mounting plate is provided with a first slide groove which corresponds to the expansion arm one by one. The first slide groove is provided so that the expansion arm can slide along the first slide groove, and the first slide groove limits the sliding direction of the expansion arm so that the expansion arm expands or relaxes the airbag sleeve more smoothly and with a smaller position error.

[0008] According to some embodiments of the present invention, the first transmission unit includes a first driving gear, a first driven gear and a first connecting member corresponding to the spreading arm one by one, the first driving gear is movably connected to the first driving member, the first driven gear is provided with a first arc-shaped groove corresponding to the spreading arm one by one, one end of the first connecting member passes through the first arc-shaped groove and is connected to the spreading arm, and the rotation of the first driven gear can drive the first connecting member to slide along the first arc-shaped groove, thereby driving the spreading arm to slide. The first driving gear rotates to drive the first arc-shaped groove on the first driven gear to rotate, thereby causing the first connecting member to slide relative to the first arc-shaped groove, and also driving the spreading arm to slide, so that the structure is relatively simple and the transmission is effective.

[0009] According to some embodiments of the present invention, a first rack is further included, and the first rack is meshed with the first driving gear and the first driven gear respectively. The first rack can mesh with multiple first driven gears, which is conducive to assembling more airbag covers at the same time and improving assembly efficiency.

[0010] According to some embodiments of the present invention, the second drive unit includes a second mounting plate, a second drive member, and a second transmission unit. The second mounting plate is movably disposed on the base. The second drive member and the second transmission unit are both mounted on the second mounting plate. The fixed arm is connected to the second transmission unit. The second drive member can drive at least three fixed arms to slide closer to or farther from each other on the second mounting plate through the second transmission unit. By configuring the second drive unit as the second mounting plate, the second drive member, and the second transmission unit, the second drive member can simultaneously control at least three fixed arms to slide closer to or farther from each other on the second mounting plate through the second transmission unit, thereby completing the step of clamping the airbag cover. The position error of the airbag cover clamping process is small and the efficiency is high.

[0011] According to some embodiments of the present invention, the second mounting plate is provided with a second slide groove which corresponds to the fixed arm one by one. The second slide groove is provided so that the fixed arm can slide along the second slide groove, and the second slide groove limits the sliding direction of the fixed arm so that the fixed arm clamps the airbag cover more stably and the position error is smaller.

[0012] According to some embodiments of the present invention, the second transmission unit includes a second active gear, a second driven gear and a second connecting member corresponding to the fixed arm one by one, the second active gear is movably connected to the second driving member, the second driven gear is provided with a second arc groove corresponding to the fixed arm one by one, one end of the second connecting member passes through the second arc groove and is connected to the fixed arm, and the rotation of the second driven gear can drive the second connecting member to slide along the second arc groove, thereby driving the fixed arm to slide along the second slide groove. The second active gear rotates to drive the second arc groove on the second driven gear to rotate, thereby causing the second connecting member to slide relative to the second arc groove, and also driving the fixed arm to slide along the second slide groove, so that the structure is relatively simple and the transmission is effective.

[0013] According to some embodiments of the present invention, a second rack is further included, and the second rack is meshed with the second driving gear and the second driven gear respectively. The second rack can mesh with multiple second driven gears, which is conducive to assembling more airbag covers at the same time and improving assembly efficiency.

[0014] According to some embodiments of the present invention, the spreading arm and the fixed arm are staggered. The staggered arrangement makes the contact area of ​​the fixed arm on the airbag sleeve larger, and the friction force of the fixed arm on the airbag sleeve is greater when the fixed arm applies the same clamping pressure, thereby strengthening the positioning of the airbag sleeve during the relaxation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a structural schematic diagram of an air bag sleeve expansion and fixing device of a urinary catheter according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the opening mechanism and the fixing mechanism shown in ;

[0018] Figure 3 for Figure 2 An enlarged schematic diagram of A shown in FIG.

[0019] Figure 4 for Figure 2 An enlarged schematic diagram of point B shown in FIG.

[0020] Figure 5 for Figure 2 An exploded schematic diagram of the expansion mechanism shown in FIG.

[0021] Figure 6 for Figure 5 A schematic structural diagram of the first transmission unit and the spreading arm shown in FIG.

[0022] Figure 7 for Figure 6 Another direction view of the first transmission unit and the spreading arm shown in FIG.

[0023] Figure 8 for Figure 2 An exploded schematic diagram of the fixing mechanism shown in ;

[0024] Fig. 9 for Figure 8 A schematic structural diagram of the second transmission unit and the fixed arm shown in ;

[0025] Fig.10 for Fig. 9 Another direction view of the second transmission unit and the fixed arm shown in ;

[0026] Fig.11 for Figure 2 A schematic diagram of the structure of the expansion mechanism and the fixing mechanism during the relaxation process of the airbag sleeve shown in FIG.

[0027] Fig.12 for Fig.11 An enlarged schematic diagram of point C is shown in FIG.

[0028] Reference numerals:

[0029] Base 100, driving mechanism 200, opening mechanism 300, fixing mechanism 400, airbag cover 500,

[0030] The guide rail 110, the third driving unit 210, the fourth driving unit 220, the spreading arm 310, the first transmission unit 320, the first slide slot 330, the first mounting plate 340, the fixed arm 410, the second transmission unit 420, the second slide slot 430, the second mounting plate 440, the auxiliary positioning structure 450,

[0031] The opening portion 311 , the first sliding portion 312 , the first arc-shaped groove 321 , the first driving gear 322 , the first rack 323 , the first driven gear 324 , the clamping portion 411 , the second sliding portion 412 , the second arc-shaped groove 421 , the second driving gear 422 , the second rack 423 , and the second driven gear 424 . DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, the meaning of "a plurality" is more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Reference Figure 1 , Figure 2The present invention discloses a balloon sleeve expansion and fixing device for a urinary catheter, comprising: a base 100, an expansion mechanism 300 and a fixing mechanism 400. The expansion mechanism 300 is movably mounted on the base 100, and the expansion mechanism 300 comprises a first driving unit and an expansion unit. In this embodiment, there are five expansion units, and each expansion unit has three expansion arms 310. The first driving unit can drive the three expansion arms 310 of one expansion unit to move to expand the balloon sleeve 500; the fixing mechanism 400 is movably mounted on the base 100, and the fixing mechanism 400 comprises a second driving unit and a fixing unit. In this embodiment, there are five fixing units, and each expansion unit has three fixing arms 410. The three fixing arms 410 of any one fixing unit are parallel to and face-to-face with the three expansion arms 310 of one expansion unit, and the second driving unit can drive the three fixing arms 410 of one fixing unit to move to clamp and fix the expanded balloon sleeve 500 on the drainage tube of the urinary catheter. A first driving unit is provided to drive the expansion arm 310 to move so as to expand the airbag cover 500, and then a second driving unit is provided to drive the fixing arm 410 to move so as to clamp and fix the expanded airbag cover 500 on the drainage tube of the catheter. When the expansion arm 310 releases the airbag cover 500, the airbag cover 500 is still in a clamped and fixed state, thereby reducing the position error of the airbag cover 500 after being sleeved on the drainage tube.

[0037] Reference Figure 2 , Figure 5 In some embodiments of the present invention, the first driving unit includes a first mounting plate 340, a first driving member (not shown in the figure) and a first transmission unit 320. The first mounting plate 340 is movably arranged on the base 100. The first driving member and the first transmission unit 320 are both mounted on the first mounting plate 340. The spreading arm 310 is connected to the first transmission unit 320. The first driving member can drive at least three spreading arms 310 to slide closer to or farther from each other on the first mounting plate 340 through the first transmission unit 320. By configuring the first driving unit as the first mounting plate 340, the first driving member and the first transmission unit 320, the first driving member can simultaneously control at least three spreading arms 310 to slide closer to or farther from each other on the first mounting plate 340 through the first transmission unit 320, thereby completing the steps of spreading and releasing the airbag cover 500. In the process of spreading and releasing the airbag cover 500, the position error of the airbag cover 500 is small and the efficiency is high.

[0038] Reference Figure 2 , Figure 3 , Figure 5In some embodiments of the present invention, the first mounting plate 340 is provided with first slide grooves 330 that correspond to the expansion arms 310 one by one. In this embodiment, three expansion arms 310 correspond to three first slide grooves 330, and one end of the three first slide grooves 330 faces the expansion center of the expansion unit. The first slide grooves 330 are provided so that the expansion arms 310 can slide along the first slide grooves 330, approaching or moving away from the expansion center of the expansion unit. The first slide grooves 330 limit the sliding direction of the expansion arms 310, so that the expansion arms 310 expand or relax the airbag cover 500 more smoothly, and the position error is smaller.

[0039] Reference Figures 5 to 7 In some embodiments of the present invention, the first transmission unit 320 includes a first driving gear 322, a first driven gear 324, and a first connecting member (not shown) corresponding to the opening arm 310. The first driving gear 322 is movably connected to the first driving member. The first driven gear 324 is provided with a first arc groove 321 corresponding to the opening arm 310. One end of the first connecting member passes through the first arc groove 321 and is connected to the opening arm 310. The rotation of the first driven gear 324 can drive the first connecting member to slide along the first arc groove 321, and then drive the opening arm 310 to slide along the first slide groove 330. The first driving gear 322 rotates to drive the first arc groove 321 on the first driven gear 324 to rotate, so that the first connecting member slides relative to the first arc groove 321, and also drives the opening arm 310 to slide along the first slide groove 330. The structure is relatively simple and the transmission is effective.

[0040] In some embodiments of the present invention, the first connecting member is a latch, and one end of the latch passes through the first arc-shaped slot 321 and is fixedly connected to the spreading arm 310. By setting the first connecting member as a latch, assembly and disassembly are facilitated.

[0041] Reference Figures 5 to 7 In some embodiments of the present invention, a first rack 323 is further included, and the first rack 323 is respectively meshed with the first driving gear 322 and the first driven gear 324. In this embodiment, a first rack 323 is provided to mesh with five first driven gears 324, thereby driving more opening arms 310 to move, which is conducive to assembling more airbag covers 500 at the same time and improving assembly efficiency.

[0042] Reference Figure 2 , Figure 8In some embodiments of the present invention, the second driving unit includes a second mounting plate 440, a second driving member (not shown in the figure) and a second transmission unit 420. The second mounting plate 440 is movably arranged on the base 100. The second driving member and the second transmission unit 420 are both mounted on the second mounting plate 440. The fixed arm 410 is connected to the second transmission unit 420. The second driving member can drive at least three fixed arms 410 to slide closer to or farther from each other on the second mounting plate 440 through the second transmission unit 420. By configuring the second driving unit as the second mounting plate 440, the second driving member and the second transmission unit 420, the second driving member can simultaneously control at least three fixed arms 410 to slide closer to or farther from each other on the second mounting plate 440 through the second transmission unit 420, thereby completing the step of clamping the airbag cover 500. The position error of the process of clamping the airbag cover 500 is small and the efficiency is high.

[0043] Reference Figure 8 In some embodiments of the present invention, the second mounting plate 440 is provided with second slide grooves 430 that correspond to the fixed arms 410 one by one. In this embodiment, three fixed arms 410 correspond to three second slide grooves 430, one end of the three second slide grooves 430 faces the clamping center of the fixed unit, and the second slide grooves 430 are provided so that the fixed arms 410 can slide along the second slide grooves 430, approaching or moving away from the clamping center of the fixed unit. The second slide grooves 430 limit the sliding direction of the fixed arms 410, so that the fixed arms 410 clamp the airbag cover 500 more stably, and the position error is smaller.

[0044] Reference Figures 8 to 10 In some embodiments of the present invention, the second transmission unit 420 includes a second driving gear 422, a second driven gear 424, and a second connecting member (not shown) corresponding to the fixed arm 410. The second driving gear 422 is movably connected to the second driving member. The second driven gear 424 is provided with a second arc groove 421 corresponding to the fixed arm 410. One end of the second connecting member passes through the second arc groove 421 and is connected to the fixed arm 410. The rotation of the second driven gear 424 can drive the second connecting member to slide along the second arc groove 421, thereby driving the fixed arm 410 to slide along the second slide groove 430. The second driving gear 422 rotates to drive the second arc groove 421 on the second driven gear 424 to rotate, thereby causing the second connecting member to slide relative to the second arc groove 421, and also driving the fixed arm 410 to slide along the second slide groove 430. The structure is relatively simple and the transmission is effective.

[0045] In some embodiments of the present invention, the second connecting member is a latch, and one end of the latch passes through the second arc-shaped slot 421 and is fixedly connected to the fixed arm 410. By setting the second connecting member as a latch, assembly and disassembly are facilitated.

[0046] Reference Figures 8 to 10 In some embodiments of the present invention, a second rack 423 is further included, and the second rack 423 is respectively meshed with the second driving gear 422 and the second driven gear 424. In this embodiment, a second rack 423 is provided to mesh with five second driven gears 424, thereby driving more fixed arms 410 to move, which is conducive to assembling more airbag covers 500 at the same time and improving assembly efficiency.

[0047] Reference Figure 11 to Figure 12 In some embodiments of the present invention, the spreading arm 310 is staggered with the fixed arm 410. The staggered arrangement makes the contact area of ​​the fixed arm 410 on the airbag sleeve 500 larger, and the friction force of the fixed arm 410 on the airbag sleeve 500 is greater when the fixed arm 410 applies the same clamping pressure, thereby strengthening the positioning of the airbag sleeve 500 during the relaxation process.

[0048] In some embodiments of the present invention, the first driving member and the second driving member are both motors. The motor drive can more accurately control the displacement of the expansion arm 310 and the fixed arm 410, so that the expansion force of the expansion arm 310 on the airbag cover 500 and the clamping force of the fixed arm 410 on the airbag cover 500 can be controlled with higher precision.

[0049] Reference Figure 1 In some embodiments of the present invention, a driving mechanism 200 is further included. The driving mechanism 200 is installed on the base 100. The driving mechanism 200 includes a third driving unit 210 and a fourth driving unit 220. A guide rail 110 is mounted on the base 100. The third driving unit 210 and the fourth driving unit 220 can respectively drive the spreading mechanism 300 and the fixing mechanism 400 to move linearly along the guide rail 110. By respectively arranging the third driving unit 210 and the fourth driving unit 220 to drive the spreading mechanism 300 and the fixing mechanism 400 to move, the movement time of the spreading mechanism 300 and the fixing mechanism can be saved.

[0050] Reference Figure 3 , Figure 5 , Figure 6In some embodiments of the present invention, the expansion arm 310 includes an expansion portion 311 and a first sliding portion 312, the expansion portion 311 is fixedly connected to the first sliding portion 312, the expansion portion 311 is located at the front end of the first sliding portion 312 and can abut against the inner hole side wall of the airbag cover 500, and the first sliding portion 312 is embedded in the first slide groove 330 and can slide along the first slide groove 330. The fixed arm 410 includes a clamping portion 411 and a second sliding portion 412, the clamping portion 411 is fixedly connected to the second sliding portion 412, the clamping portion 411 is located at the front end of the second sliding portion 412 and can abut against the outer side wall of the airbag cover 500, and the second sliding portion 412 is embedded in the second slide groove 430 and can slide along the second slide groove 430. An opening portion 311 and a first sliding portion 312 are provided, the opening portion 311 is inserted into the airbag cover 500, and the first sliding portion 312 slides in the first slide groove 330 to drive the opening portion 311 to open the airbag cover 500. A clamping portion 411 and a second sliding portion 412 are provided, the clamping portion 411 abuts against the airbag cover 500, and the second sliding portion 412 slides in the second slide groove 430 to drive the clamping portion 411 to clamp the airbag cover 500. The opening arm 310 and the fixing arm 410 can move smoothly, and the process of opening, loosening and clamping the airbag cover 500 can be stably completed.

[0051] Reference Figure 3 In some embodiments of the present invention, the expansion portion 311 is in a straight strip shape and has a smooth surface. The straight strip shape allows the airbag sleeve 500 to be more evenly stressed in the front-to-back direction when the expansion portion 311 is expanded, and the smooth surface of the expansion portion 311 allows the expansion portion 311 to exert less friction on the airbag sleeve 500 when the expansion portion 311 is removed from the airbag sleeve 500, which is beneficial to reducing the displacement of the airbag sleeve 500 relative to the drainage tube during the relaxation process.

[0052] In some embodiments of the present invention, an auxiliary positioning structure 450 is provided on the fixed arm 410, and the auxiliary positioning structure 450 can contact the airbag cover 500. The auxiliary positioning structure 450 is provided to help strengthen the positioning of the airbag cover 500 by the fixed arm 410 during the process of the expansion arm 310 being released from the airbag cover 500.

[0053] Reference Figure 4 In some embodiments of the present invention, the auxiliary positioning structure 450 is a raised pattern. The auxiliary positioning structure 450 is set as a raised pattern, which can enhance the positioning of the airbag cover 500 by enhancing the friction force of the fixed arm 410 on the airbag cover 500. The structure is simple and effective.

[0054] In some embodiments of the present invention, the auxiliary positioning structure 450 may also be a suction cup. The suction cup is adsorbed to the surface of the airbag sleeve 500 by generating negative pressure, so that the friction between the suction cup and the airbag sleeve 500 is relatively large, which helps to strengthen the positioning of the airbag sleeve 500 by the fixed arm 410. When the airbag sleeve 500 is connected to the drainage tube sleeve, the negative pressure of the suction cup is removed, the suction cup is separated from the airbag sleeve 500, and the fixed arm 410 can be released immediately.

[0055] In the description of this specification, the description with reference to the terms "some embodiments", "certain embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments in a suitable manner.

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A balloon sleeve expansion and fixing device for a urinary catheter, characterized in that: include: base(100); an expansion mechanism (300) movably mounted on the base (100), the expansion mechanism (300) comprising a first driving unit and an expansion unit, the expansion unit comprising at least three expansion arms (310), the first driving unit being capable of driving at least three expansion arms (310) to move so as to expand the airbag sleeve (500); a fixing mechanism (400) movably mounted on the base (100), the fixing mechanism (400) comprising a second driving unit and a fixing unit, the fixing unit comprising at least three fixing arms (410), the fixing arms (410) being arranged parallel to and face to face with the expansion arms (310), the second driving unit being capable of driving at least three fixing arms (410) to move so as to clamp and fix the expanded airbag sleeve (500) on the drainage tube of the urinary catheter; The first driving unit comprises a first mounting plate (340), a first driving member and a first transmission unit (320); the first mounting plate (340) is movably arranged on the base (100); the first driving member and the first transmission unit (320) are both mounted on the first mounting plate (340); the spreading arms (310) are connected to the first transmission unit (320); and the first driving member can drive at least three spreading arms (310) to slide on the first mounting plate (340) toward or away from each other through the first transmission unit (320); The first mounting plate (340) is provided with a first sliding groove (330) which cooperates with the spreading arm (310) in a one-to-one correspondence; The first transmission unit (320) comprises a first driving gear (322), a first driven gear (324) and a first connecting member corresponding to the spreading arm (310) in a one-to-one manner, the first driving gear (322) being movably connected to the first driving member, the first driven gear (324) being provided with a first arc-shaped groove (321) corresponding to the spreading arm (310) in a one-to-one manner, one end of the first connecting member passing through the first arc-shaped groove (321) to be connected to the spreading arm (310), and the rotation of the first driven gear (324) can drive the first connecting member to slide along the first arc-shaped groove, thereby driving the spreading arm (310) to slide; The airbag sleeve expansion and fixing device further comprises a first rack (323), wherein the first rack (323) is meshed with the first driving gear (322) and the first driven gear (324) respectively; The second driving unit comprises a second mounting plate (440), a second driving member and a second transmission unit (420); the second mounting plate (440) is movably arranged on the base (100); the second driving member and the second transmission unit (420) are both mounted on the second mounting plate (440); the fixed arm (410) is connected to the second transmission unit (420); and the second driving member can drive at least three fixed arms (410) to slide on the second mounting plate (440) toward or away from each other through the second transmission unit (420); The second mounting plate (440) is provided with a second sliding groove (430) which cooperates with the fixed arm (410) in a one-to-one correspondence; The second transmission unit (420) comprises a second driving gear (422), a second driven gear (424) and a second connecting member corresponding one-to-one to the fixed arm (410); the second driving gear (422) is movably connected to the second driving member; the second driven gear (424) is provided with a second arc groove (421) corresponding one-to-one to the fixed arm (410); one end of the second connecting member passes through the second arc groove (421) and is connected to the fixed arm (410); the second driven gear (424) rotates to drive the second connecting member to slide along the second arc groove, thereby driving the fixed arm (410) to slide along the second sliding groove (430).

2. The balloon sleeve expansion and fixing device for a urinary catheter according to claim 1, characterized in that: It also includes a second rack (423), wherein the second rack (423) is meshed with the second driving gear (422) and the second driven gear (424) respectively.

3. The balloon sleeve expansion and fixing device for a urinary catheter according to claim 1, characterized in that: The spreading arm (310) and the fixing arm (410) are arranged in a staggered manner.

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