CN212141132U - A balloon sleeve opening and fixing device for urinary catheter - Google Patents

Abstract

The utility model discloses a gasbag cover of catheter struts fixing device, include: base, distraction mechanism and fixed establishment. The opening mechanism is movably arranged on the base and comprises a first driving unit and an opening unit, the opening unit comprises at least three opening arms, and the first driving unit can drive the at least three opening arms to move so as to open the air bag sleeve; the fixing mechanism is movably installed 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 and the expanding arms are arranged in parallel and face to face, and the second driving unit can drive the at least three fixing arms to move so as to clamp and fix the expanded airbag sleeve on the drainage tube. Through this technical scheme, when strutting the arm and loosening the gasbag cover, the gasbag cover still is in by the tight fixed state of fixed arm clamp, makes the gasbag cover be difficult for being propped the arm and deviate from the pulling, can reduce the position error of gasbag cover after the drainage tube is cup jointed.

Description

A balloon sleeve opening and fixing device for urinary catheter

technical field

The utility model relates to the technical field of cannula machines, in particular to a balloon sleeve expansion and fixing device for a urinary catheter.

Background technique

Urinary catheters are mainly used to excrete urine from the body, which is of great help to people with physical inconvenience and incontinence, and is widely used in medicine at present. A 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 a balloon sleeve and a drainage tube. After the urinary catheter is inserted into the bladder, the balloon sleeve close to the head end of the urinary catheter is inflated, so that the balloon sleeve is expanded and the urinary catheter is stuck in the bladder and is not easy to come out. In the prior art, the airbag sleeve is mainly opened manually, and then the airbag sleeve is inserted into the drainage tube and then loosened to connect the two. During the loosening 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 products.

Utility model content

The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present utility model proposes a balloon sleeve expansion and fixing device for a urinary catheter, which can expand the balloon sleeve and clamp and fix the opened balloon sleeve on the drainage tube.

The embodiment of the utility model discloses an airbag sleeve expansion and fixing device for a urinary catheter, comprising: a base; a expansion mechanism, which is movably installed on the base, and the expansion mechanism includes a first driving unit and a expansion unit , the spreading unit includes at least three spreading arms, the first driving unit can drive the at least three spreading arms to move to spread the airbag cover; the fixing mechanism is movably installed on the base, The fixing mechanism includes a second driving unit and a fixing unit, the fixing unit includes at least three fixing arms, the fixing arms are arranged in parallel with the opening arms and face to face, and the second driving unit can drive at least three The fixing arm moves to clamp and fix the expanded balloon sleeve on the drainage tube of the urinary catheter.

According to an embodiment of the present invention, a device for expanding and fixing a bladder sleeve for a urinary catheter has at least the following beneficial effects: a first drive unit is arranged to drive the opening arm to move to expand the bladder sleeve, and then a second drive unit is arranged to drive the opening and closing arm. The fixed arm moves to clamp and fix the stretched balloon cover on the drainage tube of the catheter. When the spread arm releases the balloon cover, the balloon cover is still in a clamped and fixed state, which can reduce the amount of the balloon cover on the sleeve. Position error after receiving the drainage tube.

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, and the first driving unit The first drive unit and the first drive unit are both mounted on the first mounting plate, the spreader arm is connected to the first drive unit, and the first drive unit can drive at least three Each of the spreader arms slides toward or away from each other on the first mounting plate. By arranging 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 approach each other on the first mounting plate through the first transmission unit Or slide away from the airbag cover, and then complete the steps of opening the airbag cover and releasing the airbag cover, the position error of the process of opening and releasing the airbag cover is small and the efficiency is high.

According to some embodiments of the present invention, the first mounting plate is provided with first sliding grooves which are matched with the spreading arms in a one-to-one correspondence. The first chute is provided so that the spreader arm can slide along the first chute, and the sliding direction of the spreader arm is restricted by the first chute, so that the spreader arm spreads or loosens the airbag cover more smoothly, and the position error is smaller.

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 opening arm in one-to-one correspondence, the first driving gear and the The first driving member is movably connected, the first driven gear is provided with a first arc-shaped groove corresponding to the opening arm one-to-one, and one end of the first connecting member passes through the first arc-shaped groove and is connected to the first arc-shaped groove. The spreading arms are connected, and the rotation of the first driven gear can drive the first connecting piece to slide along the first arc-shaped groove, thereby driving the spreading arms to slide. The rotation of the first driving gear drives the first arc-shaped groove on the first driven gear to rotate, so that the first connecting piece slides relative to the first arc-shaped groove, and also drives the opening arm to slide. The structure is relatively simple and the transmission is effective. .

According to some embodiments of the present invention, a first rack is further included, and the first rack is respectively meshed with the first driving gear and the first driven gear. The arrangement of the first rack can engage with a plurality of first driven gears, which is beneficial to assemble more airbag covers at the same time and improves the assembling efficiency.

According to some embodiments of the present invention, the second driving unit includes a second mounting plate, a second driving member and a second transmission unit, the second mounting plate is movably arranged on the base, and the second driving unit The second drive unit and the second drive unit are both mounted on the second mounting plate, the fixed arm is connected with the second drive unit, and the second drive unit can drive at least three The fixed arms slide toward or away from each other on the second mounting plate. By arranging the second driving unit as the second mounting plate, the second driving member and the second transmission unit, the second driving member can simultaneously control the at least three fixed arms to approach or approach each other on the second mounting plate through the second transmission unit. Slide away, and then complete the step of clamping the airbag cover, the position error of the process of clamping the airbag cover is small and the efficiency is high.

According to some embodiments of the present invention, the second mounting plate is provided with second sliding grooves which are matched with the fixing arms in a one-to-one correspondence. The second chute is arranged so that the fixing arm can slide along the second chute, and the sliding direction of the fixing arm is restricted by the second chute, so that the fixing arm clamps the airbag sleeve more smoothly and the position error is smaller.

According to some embodiments of the present invention, the second transmission unit includes a second driving gear, a second driven gear and a second connecting member corresponding to the fixed arm one-to-one, the second driving gear and the The second driving member is movably connected, the second driven gear is provided with a second arc-shaped groove corresponding to the fixed arm one-to-one, and one end of the second connecting member passes through the second arc-shaped groove and is connected to the fixed arm. The fixed arms are connected, and the rotation of the second driven gear can drive the second connecting piece to slide along the second arc-shaped groove, thereby driving the fixed arm to slide along the second sliding groove. The rotation of the second driving gear drives the second arc-shaped groove on the second driven gear to rotate, so that the second connecting piece slides relative to the second arc-shaped groove, and also drives the fixed arm to slide along the second sliding groove. Simple, efficient transmission.

According to some embodiments of the present invention, a second rack is further included, and the second rack is respectively meshed with the second driving gear and the second driven gear. The arrangement of the second rack can mesh with a plurality of second driven gears, which is beneficial to assemble more airbag covers at the same time and improves the assembling efficiency.

According to some embodiments of the present invention, the spreading arm and the fixing arm are staggered. The staggered setting makes the contact area of the fixed arm on the airbag cover larger, and the frictional force of the fixed arm on the airbag cover is greater when the fixed arm exerts the same clamping pressure, which strengthens the positioning of the airbag cover during the loosening process. .

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a balloon sleeve expansion and fixing device of a urinary catheter according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the spreading mechanism and the fixing mechanism shown in FIG. 1;

Fig. 3 is the enlarged schematic diagram of the place A shown in Fig. 2;

Fig. 4 is the enlarged schematic diagram at B shown in Fig. 2;

Fig. 5 is the exploded schematic diagram of the opening mechanism shown in Fig. 2;

FIG. 6 is a schematic structural diagram of the first transmission unit and the spreading arm shown in FIG. 5;

Fig. 7 is another direction view of the first transmission unit and the spreading arm shown in Fig. 6;

Fig. 8 is the exploded schematic diagram of the fixing mechanism shown in Fig. 2;

FIG. 9 is a schematic structural diagram of the second transmission unit and the fixed arm shown in FIG. 8;

Fig. 10 is another direction view of the second transmission unit and the fixed arm shown in Fig. 9;

FIG. 11 is a schematic structural diagram of the expansion mechanism and the fixing mechanism shown in FIG. 2 during the process of releasing the airbag cover;

FIG. 12 is an enlarged schematic view of the point C shown in FIG. 11 .

Reference number:

The base 100, the driving mechanism 200, the opening mechanism 300, the fixing mechanism 400, the airbag cover 500,

Guide rail 110, third drive unit 210, fourth drive unit 220, spreader arm 310, first transmission unit 320, first chute 330, first mounting plate 340, fixed arm 410, second transmission unit 420, second The chute 430, the second mounting plate 440, the auxiliary positioning structure 450,

The opening part 311, the first sliding part 312, the first arc groove 321, the first driving gear 322, the first rack 323, the first driven gear 324, the clamping part 411, the second sliding part 412, the second The arc groove 421 , the second driving gear 422 , the second rack 423 , and the second driven gear 424 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present utility model, it should be understood that the azimuth description, for example, the azimuth or position relationship indicated by up, down, front, rear, etc., is based on the azimuth or position relationship shown in the accompanying drawings, which is only for the convenience of description The present invention and the simplified description are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, a plurality of means two or more. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

Referring to FIG. 1 and FIG. 2 , the present invention discloses a balloon sleeve opening and fixing device for a urinary catheter, including a base 100 , a spreading mechanism 300 and a fixing mechanism 400 . The spreading mechanism 300 is movably installed on the base 100 . The spreading mechanism 300 includes a first driving unit and a spreading unit. In this embodiment, there are five spreading units, and each spreading unit has three spreading arms 310 . The first driving unit can drive the three spreading arms 310 of one spreading unit to move to spread the airbag cover 500; the fixing mechanism 400 is movably installed on the base 100, and the fixing mechanism 400 includes a second driving unit and a fixing unit. In the example, there are 5 fixing units, and each spreading unit has 3 fixing arms 410 . The three fixing arms 410 of any one fixing unit are arranged in parallel and face to face with the three spreading arms 310 of one spreading unit, and the second driving unit can drive the three fixing arms 410 of one fixing unit to move so as to spread the The opened balloon sleeve 500 is clamped and fixed on the drainage tube of the urinary catheter. The first driving unit is arranged to drive the spreading arm 310 to move to spread the balloon sleeve 500, and then the second driving unit is arranged to drive the fixing arm 410 to move to clamp and fix the opened balloon sleeve 500 on the drainage tube of the urinary catheter. When the expanding arm 310 releases the airbag cover 500, the airbag cover 500 is still in a clamped and fixed state, which can reduce the position error of the airbag cover 500 after being sleeved on the drainage tube.

2 and 5, in some embodiments of the present invention, the first drive unit includes a first mounting plate 340, a first drive member (not shown in the figure) and a first transmission unit 320. The first installation The 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 with the first transmission unit 320, and the first driving member passes through the first transmission unit 320 can drive at least three spreading arms 310 to slide close to or away from each other on the first mounting plate 340 . By arranging the first drive unit as the first installation plate 340 , the first drive member and the first transmission unit 320 , the first drive member can simultaneously control the at least three spreading arms 310 in the first installation through the first transmission unit 320 . The plates 340 slide close to or away from each other, thereby completing the steps of expanding and releasing the airbag cover 500 .

Referring to FIG. 2 , FIG. 3 and FIG. 5 , in some embodiments of the present invention, the first mounting plate 340 is provided with a first chute 330 which is matched with the opening arms 310 in a one-to-one correspondence. In this embodiment, the three spreading arms 310 correspond to the three first sliding grooves 330 , and one end of the three first sliding grooves 330 faces the spreading center of the spreading unit. As the first sliding slot 330 slides, it approaches or moves away from the expansion center of the expansion unit, and the first sliding slot 330 restricts the sliding direction of the expansion arm 310 so that the expansion arm 310 can expand or release the airbag cover 500 more smoothly. , the position error is smaller.

Referring to FIGS. 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 corresponding to the opening arm 310 one-to-one (not shown in the figure), the first driving gear 322 is movably connected with the first driving member, the first driven gear 324 is provided with a first arc-shaped groove 321 corresponding to the opening arm 310 one-to-one, and the first connecting member One end passes through the first arc-shaped groove 321 and is connected to the opening arm 310. The rotation of the first driven gear 324 can drive the first connecting piece to slide along the first arc-shaped groove 321, thereby driving the opening arm 310 along the first sliding groove. 330 slides. The rotation of the first driving gear 322 drives the first arc-shaped groove 321 on the first driven gear 324 to rotate, so that the first connecting piece slides relative to the first arc-shaped groove 321, and also drives the opening arm 310 along the first arc groove 321. The chute 330 slides, the structure is relatively simple, and the transmission is effective.

In some embodiments of the present invention, the first connector is a plug, and one end of the plug passes through the first arc-shaped groove 321 and is fixedly connected to the spreading arm 310 . By setting the first connecting piece as a plug, it is convenient to assemble and disassemble.

5 to 7 , in some embodiments of the present invention, a first rack 323 is further included, and the first rack 323 meshes with the first driving gear 322 and the first driven gear 324 respectively. In this embodiment, a first rack 323 is provided to mesh with five first driven gears 324, thereby driving more spreading arms 310 to move, which is beneficial to assemble more airbag covers 500 at the same time, and improves assembly efficiency.

2 and 8, in 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 The 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 fixing arm 410 is connected with the second transmission unit 420 , and the second driving member passes through the second transmission unit 420 At least three fixed arms 410 can be driven to slide close to or away from each other on the second mounting plate 440 . By setting 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 the at least three fixing arms 410 on the second mounting plate through the second transmission unit 420. 440 are slid close to or away from each other, and then the step of clamping the airbag cover 500 is completed. The position error of the process of clamping the airbag cover 500 is small and the efficiency is high.

Referring to FIG. 8 , in some embodiments of the present invention, the second mounting plate 440 is provided with a second sliding groove 430 which is matched with the fixing arm 410 in a one-to-one correspondence. In this embodiment, the three fixing arms 410 correspond to the three second sliding grooves 430 , and one end of the three second sliding grooves 430 faces the clamping center of the fixing unit. The sliding slot 430 slides toward or away from the clamping center of the fixing unit, and the second sliding slot 430 restricts the sliding direction of the fixing arm 410 so that the fixing arm 410 clamps the airbag cover 500 more smoothly, and the position error is smaller.

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 in the figure), the second driving gear 422 is movably connected with the second driving member, the second driven gear 424 is provided with a second arc-shaped groove 421 corresponding to the fixed arm 410 one-to-one, and one end of the second connecting member passes through Connected to the fixed arm 410 through the second arc-shaped groove 421 , the rotation of the second driven gear 424 can drive the second connecting piece to slide along the second arc-shaped groove 421 , thereby driving the fixed arm 410 to slide along the second sliding groove 430 . The rotation of the second driving gear 422 drives the second arc-shaped groove 421 on the second driven gear 424 to rotate, so that the second connecting member slides relative to the second arc-shaped groove 421, and also drives the fixed arm 410 to slide along the second arc groove 421. The groove 430 slides, the structure is relatively simple, and the transmission is effective.

In some embodiments of the present invention, the second connecting member is a plug, and one end of the plug is fixedly connected to the fixing arm 410 through the second arc-shaped groove 421 . By arranging the second connecting piece as a latch, assembly and disassembly are facilitated.

8 to 10 , in some embodiments of the present invention, a second rack 423 is further included, and the second rack 423 meshes with the second driving gear 422 and the second driven gear 424 respectively. In this embodiment, a second rack 423 is provided to engage with five second driven gears 424, thereby driving more fixed arms 410 to move, which is beneficial to assemble more airbag covers 500 at the same time and improves assembly efficiency.

11 to 12 , in some embodiments of the present invention, the spreading arm 310 and the fixing arm 410 are staggered. The staggered arrangement makes the contact area of the fixing arm 410 on the airbag cover 500 larger, and when the fixing arm 410 exerts the same clamping pressure, the frictional force of the fixing arm 410 on the airbag cover 500 is greater, which strengthens the relaxation process. Positioning of the airbag cover 500 .

In some embodiments of the present invention, both the first driving member and the second driving member are motors. Driven by the motor, the displacement of the spreading arm 310 and the fixing arm 410 can be controlled more precisely, so that the spreading force of the spreading arm 310 to the airbag cover 500 and the control precision of the clamping force of the fixing arm 410 to the airbag cover 500 can be controlled accurately. higher.

Referring to FIG. 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 , and the base 100 is erected on the base 100 . There is a guide rail 110 , and the third driving unit 210 and the fourth driving unit 220 can respectively drive the opening mechanism 300 and the fixing mechanism 400 to move linearly along the guide rail 110 . By disposing the third driving unit 210 and the fourth driving unit 220 respectively 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.

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

Referring to FIG. 3 , in some embodiments of the present invention, the spreading portion 311 is straight and smooth. The straight strip shape makes the force in the front and rear directions of the airbag cover 500 more uniform when the airbag cover 500 is opened by the opening part 311 , and the surface of the opening part 311 is smooth so that when the opening part 311 comes out of the airbag cover 500 , the opening part The frictional force of 311 on the airbag cover 500 is small, which is beneficial to reduce the positional offset of the airbag cover 500 relative to the drainage tube during the relaxation process.

In some embodiments of the present invention, the fixing arm 410 is provided with an auxiliary positioning structure 450 , and the auxiliary positioning structure 450 can be in contact with the airbag cover 500 . The auxiliary positioning structure 450 is provided to help strengthen the positioning of the airbag cover 500 by the fixing arm 410 during the process of the spreading arm 310 being detached from the airbag cover 500 .

Referring to FIG. 4 , in some embodiments of the present invention, the auxiliary positioning structure 450 is a raised pattern. The auxiliary positioning structure 450 is provided with a raised pattern, which can strengthen the positioning of the airbag cover 500 by enhancing the friction force of the fixing arm 410 to the airbag cover 500 , and the structure is simple and effective.

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 cover 500 by generating negative pressure, so that the frictional force between the suction cup and the airbag cover 500 is large, which helps to strengthen the positioning of the airbag cover 500 by the fixing arm 410 . After the airbag cover 500 is well connected with the drainage tube, the negative pressure of the suction cup is removed, the suction cup and the airbag cover 500 are separated, and the fixing arm 410 can be released immediately.

In the description of this specification, description with reference to the terms "some embodiments", "certain embodiments", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention middle. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in one or more embodiments.

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

Claims (10)

1. The utility model provides a gasbag cover distraction fixing device of catheter which characterized in that includes:

a base (100);

the unfolding mechanism (300) is movably mounted on the base (100), the unfolding mechanism (300) comprises a first driving unit and an unfolding unit, the unfolding unit comprises at least three unfolding arms (310), and the first driving unit can drive the at least three unfolding arms (310) to move so as to unfold the airbag cover (500);

fixed establishment (400), movable mounting be in on base (100), fixed establishment (400) include second drive unit and fixed unit, fixed unit includes at least three fixed arm (410), fixed arm (410) with prop open arm (310) parallel and face-to-face setting, the second drive unit can drive at least three fixed arm (410) move in order to will prop open gasbag cover (500) press from both sides tightly to be fixed on the drainage tube of catheter.

2. The device for distracting and fixing the airbag sheath of the urinary catheter according to claim 1, wherein 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 disposed on the base (100), the first driving member and the first transmission unit (320) are both mounted on the first mounting plate (340), the distraction arm (310) is connected with the first transmission unit (320), and the first driving member can drive at least three distraction arms (310) to slide on the first mounting plate (340) in a manner of approaching to or departing from each other through the first transmission unit (320).

3. The device for spreading the balloon sheath of the urinary catheter according to claim 2, wherein the first mounting plate (340) is provided with first sliding grooves (330) which are correspondingly matched with the spreading arms (310) one by one.

4. The device for distracting and fixing the balloon sheath of the urinary catheter according to claim 2 or 3, wherein the first transmission unit (320) comprises a first driving gear (322), a first driven gear (324) and first connecting pieces in one-to-one correspondence with the distraction arms (310), the first driving gear (322) is movably connected with the first driving pieces, first arc-shaped grooves (321) in one-to-one correspondence with the distraction arms (310) are formed in the first driven gear (324), one end of each first connecting piece penetrates through the corresponding first arc-shaped groove (321) to be connected with the distraction arms (310), and the first driven gear (324) rotates to drive the corresponding first connecting piece to slide along the corresponding first arc-shaped groove, so as to drive the distraction arms (310) to slide.

5. The balloon cover distraction device for the urinary catheter according to claim 4, further comprising a first rack (323), wherein the first rack (323) is respectively engaged with the first driving gear (322) and the first driven gear (324).

6. A urinary catheter balloon dilatation device according to claim 1 or 2, wherein 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 arms (410) are connected with 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) in a manner of approaching or departing from each other through the second transmission unit (420).

7. The device for spreading the balloon sheath of the urinary catheter according to claim 6, wherein the second mounting plate (440) is provided with second sliding grooves (430) which are correspondingly matched with the fixing arms (410) one by one.

8. The device for expanding and fixing the balloon sheath of the urinary catheter according to claim 7, wherein the second transmission unit (420) comprises a second driving gear (422), a second driven gear (424) and a second connecting member corresponding to the fixing arms (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-shaped groove (421) corresponding to the fixing arms (410), one end of the second connecting member passes through the second arc-shaped groove (421) and is connected to the fixing arms (410), and the second driven gear (424) can drive the second connecting member to slide along the second arc-shaped groove, so as to drive the fixing arms (410) to slide along the second sliding groove (430).

9. The balloon cover distraction device of a urinary catheter according to claim 8, further comprising a second rack gear (423), wherein the second rack gear (423) is respectively engaged with the second driving gear (422) and the second driven gear (424).

10. A urinary catheter balloon dilatation device according to claim 1 characterized in that said dilatation arm (310) is offset from said fixation arm (410).

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