CN112741950A - Phimosis expander - Google Patents

Abstract

The invention discloses a phimosis dilator, which comprises an inner tube, an outer sleeve and a plurality of elastic dilating valves, the outer sleeve is sleeved outside the inner tube, the inner tube can reciprocate along the axial direction of the inner tube relative to the outer sleeve, the first end of the elastic expansion flap is a free end, the second end of the elastic expansion flap is connected with the outer sleeve, the first end of the elastic expansion flap extends out from the first end of the inner tube and extends to the direction far away from the inner tube, an inclined part inclined relative to the central axis of the inner tube is formed between the first end and the second end of the elastic expansion flap, a first end of the inner tube abuts against the inclined portion, and when the inner tube reciprocates in the axial direction of the inner tube with respect to the outer sleeve, the first end of the inner tube moves relative to the inclined portion of the resilient expansion lobe to cause the first ends of the plurality of resilient expansion lobes to collapse or expand; the phimosis expander has the advantages of reasonable structure and convenient operation and use.

Description

Phimosis expander

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a phimosis expander.

Background

Phimosis is a common disease of children, and the prepuce of the phimosis of the children cannot be turned backwards to expose the urethral orifice and the glans due to the narrow prepuce opening or adhesion of the prepuce and the glans. The current phimosis treatment method comprises circumcision treatment and foreskin expansion operation treatment, wherein the circumcision treatment sometimes has difficulty in mastering the optimal excision degree of foreskin due to wound and unformed growth and development of children, meanwhile, the circumcision belongs to traumatic operation and brings great pain to patients, and postoperative recovery period is relatively long and postoperative complications are easy to cause; the foreskin expansion operation is non-invasive, so that foreskin injury is less caused, the daily life and urination of a patient are not affected, the operation pain is small, the patient who receives the foreskin expansion operation does not need to lie in bed for rest, and children and parents can easily accept the operation. Prepuce expansion surgery usually adopts phimosis expander to expand phimosis mouth, but phimosis expander among the prior art has the problem of operation or inconvenient use: when the dilator is used for dilation treatment, a doctor needs to pinch the elastic dilation flap fixed on the base to enable the elastic dilation flap to contract, then the dilation flap is placed into the foreskin, and finally the dilation flap is loosened to dilate the foreskin under the elastic acting force of the dilation flap; the expansion valve is usually provided with a plurality of expansion valves, one hand of a doctor needs to tightly hold and fold the expansion valve in the operation process, the other hand is only matched with and guided to be placed in the wrapper, the operation process is not performed at once, and the doctor is often required to hold the expansion valve for a long time, so that the muscle of the hand is easy to fatigue or stiff, and certain inconvenience is brought to the operation of the doctor; particularly, one of the expansion flaps is often ejected without being effectively bound by carelessness, which may damage the foreskin or increase the pain of the patient.

Disclosure of Invention

In view of this, the invention aims to provide a phimosis dilator which is reasonable in structure and convenient to operate and use.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a phimosis dilator, which comprises an inner tube, an outer sleeve and a plurality of elastic dilating valves, wherein the outer sleeve is sleeved outside the inner tube, the inner tube can move back and forth along the axial direction of the inner tube relative to the outer sleeve, the first end of the elastic expansion valve is a free end, and the second end of the elastic expansion valve is connected with the outer sleeve, the first end of the resilient expansion flap extends from the first end of the inner tube and extends in a direction away from the inner tube, an inclined part inclined relative to the central axis of the inner tube is formed between the first end and the second end of the elastic expansion flap, a first end of the inner tube abuts against the inclined portion, and when the inner tube reciprocates in the axial direction of the inner tube with respect to the outer sleeve, the first end of the inner tube moves relative to the inclined portion of the resilient expansion lobe to cause the first ends of the plurality of resilient expansion lobes to collapse or expand.

Preferably, the inclined portion of the elastic expansion flap is outwardly expanded with respect to the central axis of the inner tube, the first end of the inner tube abuts against the inclined portion from the outside, the first end of the elastic expansion flap is closed when the distance from the first end of the inner tube to the second end of the elastic expansion flap is increased, and the first end of the elastic expansion flap is opened when the distance from the first end of the inner tube to the second end of the elastic expansion flap is decreased.

Preferably, the first end and the second end of the inner tube are respectively provided with a first limiting ring and a second limiting ring, the outer sleeve is arranged between the first limiting ring and the second limiting ring, and the first limiting ring is abutted against the inclined part of the elastic expansion flap; and/or a plurality of fixing holes are also arranged on the second limiting ring along the circumferential direction of the second limiting ring.

Preferably, the inner tube is further sleeved with a return spring, the return spring is located between the outer tube and the second limiting ring, and two ends of the return spring are respectively abutted to the outer tube and the second limiting ring.

Preferably, a portion of the elastic expansion flap, which is close to the second end of the elastic expansion flap, is located outside the inner tube and clamped between the inner tube and the outer sleeve, a plurality of through holes respectively corresponding to the elastic expansion flaps are formed in the tube wall of the inner tube, and the inclined portion penetrates through the corresponding through holes and is inserted into the inner tube.

Preferably, the elastic expansion valve comprises expansion claws, support legs and a support arm, one end of each support leg is connected with the outer sleeve, the other end of each support leg is connected with one end of the corresponding support arm, the other end, far away from the support legs, of the support arm inclines towards the radial direction far away from the first limiting ring, one end of each expansion claw is connected with the other end of the corresponding support arm, and the other ends of the expansion claws form expansion openings around the central axis of the inner tube.

Preferably, the resilient expansion flaps are formed by bending resilient metal wires.

Preferably, the outer sleeve is provided with a plurality of pin holes for fixing the elastic expansion flaps and pin blocks, the pin holes are arranged along the axial direction of the outer sleeve, and the pin blocks are inserted into the pin holes and form and fix the expansion flaps.

Preferably, a flange is further arranged on the side wall of one side in the pin hole, the flange and the outer sleeve are integrally formed, and the pin block is further provided with positioning holes corresponding to the flanges.

Preferably, the pin block is further provided with a limiting block on one surface in the thickness direction, the limiting block is arranged in a strip shape and arranged along the length direction of the pin block, the two sides of the limiting block are respectively provided with a protruding portion, the protruding portion and the limiting block are integrally formed, and bending portions matched with the protruding portions are further arranged at the end portions of the supporting legs.

The invention has the following beneficial effects: because the outer sleeve capable of reciprocating along the inner tube is arranged, and the expansion petals are annularly arranged and connected on the outer sleeve, when the outer sleeve moves downwards relative to the inner tube, the expansion petals can be pulled downwards to move, and the expansion petals in an open state are contracted towards the central axis of the inner tube under the action of the tube diameter of the inner tube, namely, the inconvenience of pinching and closing the expansion petals by fingers when the dilator is used for surgery is avoided, so that the convenience of using the dilator is improved; when the expansion valve needs to be released, only the outer sleeve needs to be pushed upwards.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic view of the entire structure of a phimosis dilator according to the present invention;

FIG. 2 is a partially exploded view of a phimosis dilator of the present invention;

FIG. 3 is a top view of an inner tube of a phimosis dilator according to the present invention;

FIG. 4 is a schematic top view of the outer sheath of the phimosis dilator according to the present invention;

FIG. 5 is a schematic view of the pin block of a phimosis dilator according to the present invention;

fig. 6 is a schematic view of the structure of the expansion valve in a phimosis dilator according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the illustrated embodiments are not intended to limit the present invention, and in the present embodiments, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention; in addition, in the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a welding fixing manner, a pin fixing manner, or the like, which is commonly used in the prior art, and therefore, detailed description thereof is omitted in this embodiment.

As shown in fig. 1-4 and 6, the present embodiment provides a phimosis dilator, which includes an inner tube 1, an outer sleeve 2, and a plurality of elastic dilating petals 3, wherein the plurality of elastic dilating petals 3 are annularly arranged along a circumferential direction of the outer sleeve 2, a first end of each elastic dilating petal 3 is a free end, and a second end of each elastic dilating petal 3 is detachably connected to the outer sleeve 2; wherein the first end of the elastic expansion flap 3 extends from the first end of the inner tube 1 and extends to the direction far away from the inner tube 1, an inclined part 35 inclined relative to the central axis of the inner tube 1 is formed between the first end and the second end of the elastic expansion flap 3, the first end of the inner tube 1 is abutted against the inclined part 35, and when the inner tube 1 reciprocates relative to the outer sleeve 2 along the axial direction of the inner tube 1, the first end of the inner tube 1 moves relative to the inclined part 35 of the elastic expansion flap 3, so that the first ends of the elastic expansion flaps 3 are folded or unfolded. The inclined portion 35 of the elastic expansion flap 3 is outwardly opened with respect to the central axis of the inner tube 1, the first end of the inner tube 1 abuts against the inclined portion 35 from the outside, when the distance from the first end of the inner tube 1 to the second end of the elastic expansion flap 3 is increased, the first end of the elastic expansion flap 3 is closed, and when the distance from the first end of the inner tube 1 to the second end of the elastic expansion flap 3 is decreased, the first end of the elastic expansion flap 3 is opened; specifically, when the outer cannula 2 moves downwards along the inner tube 1, the expansion flap 3 can be driven to move, and at this time, the inclined portion 35 of the expansion flap 3 in the expanded state is constrained by the inner diameter of the inner tube 1 and contracts into the inner tube 1, so that the free ends of the elastic expansion flaps 3 are close to each other, that is, the expander is in the folded state, and the expansion flap 3 can be conveniently placed in the opening of the foreskin of the patient; after the expansion flap 3 is placed, the outer sleeve 2 is moved reversely, and the free ends of the elastic expansion flaps 3 are far away from each other, so that the expansion flaps 3 are in an expansion state again, and the expansion flaps 3 in the expansion state can stretch and expand the foreskin under the elastic acting force, so that the glans penis is not wrapped by the expansion flap after the prepuce opening is expanded. Because a doctor does not need to tightly pinch and fold the expansion petals 3 by hands in the using process of the dilator in the traditional mode, the problem that the doctor easily causes fatigue or stiffness of hand muscles because the doctor pinches the expansion petals 3 for a long time is avoided, and the convenience of the dilator in use is improved; and the situation that the expansion flap 3 is not effectively bound and ejected when a doctor operates the dilator, so that the foreskin of a patient can be damaged or the pain of the patient is increased is avoided. The number of the expansion valves 3 in the embodiment is 4, so that the foreskin can be uniformly expanded in multiple directions, namely, the expansion is mild, and the pain of a patient is relatively small. Of course, the same expansion effect can be achieved if 2, 3 or 5 expansion lobes 3 are provided. Before the treatment of the dilator is finished, the child patient does not need to take off the phimosis dilator; for example, when the infant needs to urinate in the treatment process by using the dilator, the infant can urinate directly, and the urine can flow out through the inner tube 1, so that the dilator is prevented from being removed, and the convenience of the dilator in the use process is improved.

In a preferred embodiment, the inclined portion 35 of the elastically expandable flap 3 may be inwardly tapered with respect to the center axis of the inner tube 1, the first end of the inner tube 1 may abut against the inclined portion 35 from the outside, the first end of the elastically expandable flap 3 may be tapered when the distance between the first end of the inner tube 1 and the second end of the elastically expandable flap 3 increases, and the first end of the elastically expandable flap 3 may be enlarged when the distance between the first end of the inner tube 1 and the second end of the elastically expandable flap 3 decreases.

As shown in fig. 1 and 2, in a preferred embodiment, a first limit ring 11 and a second limit ring 12 are respectively disposed at two ends of the inner tube 1, the outer tube 2 is disposed between the first limit ring 11 and the second limit ring 12, and the first limit ring 11 abuts against the inclined portion 35 of the elastic expansion flap 3. The first limiting ring 11 and the inner tube 1 are integrally formed in an injection molding mode, and the first limiting ring 11 and the inner tube 1 can be fixed by gluing or bolts. In the embodiment, the second limit ring 12 is detachably connected with the inner tube 1; that is, an internal thread is provided on the end portion of the inner pipe 1 opposite to the first stopper ring 11, an external thread that fits into the internal thread is provided on the second stopper ring 12, and the second stopper ring 12 and the inner pipe 1 are fixed by the internal and external threads by screwing, but of course, the second stopper ring 12 and the inner pipe may be fixed by gluing or by bolts. Set up the spacing ring at the both ends of inner tube 1 and can retrain outer tube 2's upper limit and lower limit displacement position, avoid outer tube 2 slippage from inner tube 1, improve the convenience that the expander used. In this embodiment, a plurality of fixing holes 14 are further formed in the second limiting ring 12 along the circumferential direction of the second limiting ring, the fixing holes 14 can be used for penetrating ropes or medical adhesive tapes, so that the dilator can be fixed on the body of the infant through the ropes or the medical adhesive tapes, the treatment can be completed within a certain time when the dilator is used for treatment, the child is always alive and active, and the dilator can be prevented from slipping from the foreskin and affecting the treatment effect of the dilator due to the action of the infant after the dilator is fixed on the body of the infant through the mutual matching of the fixing holes 14 and the ropes or the medical adhesive tapes and the fixing holes 14.

In a preferred embodiment, the phimosis dilator can further include a damping device, the damping device can include the location marble that sets up in outer tube 2, and encircle a plurality of recesses of establishing on the outer wall of inner tube 1, the recess sets up along the axial direction interval of inner tube 1, location marble and recess match each other, damping device can reduce the gliding flexibility of outer tube along the inner tube, can make elasticity expansion lamella 3 open by controllable under the drive of outer tube 2, it has avoided the power of loading on elasticity expansion lamella 13 to be released back elasticity expansion lamella 3 one and open the time patient can not have an adaptation or the process of tolerating to the expanding force of dilator, thereby increase patient's misery.

In a preferred embodiment, the phimosis dilator further comprises an adjusting device, the adjusting device is sleeved outside the inner tube 1 and the outer sleeve 2, one end of the adjusting device is abutted to the first limiting ring 11, the adjusting device is movably connected with the outer sleeve 2 and can reciprocate and position relative to the outer sleeve 2 along the axial direction of the inner tube 1, when the adjusting device reciprocates relative to the outer sleeve 2 along the axial direction of the inner tube 1, the first limiting ring 11 correspondingly moves relative to the inclined portion 35 to adjust the opening degree of the first ends of the plurality of elastic dilating lobes. When the outer sleeve 2 moves downwards along the inner tube 1 and relative to the first limiting ring 11, the free ends of the expansion flaps 3 can be driven to move towards the inner tube 1, and at the moment, the expansion flaps 3 in the expansion state are restricted by the inner diameter of the inner tube 1, so that the free ends of the elastic expansion flaps 3 can be close to each other, namely, the expander is in the folding state, and the expansion flaps 3 can be conveniently placed in the prepuce openings of patients; after the expansion flap 3 is placed, the outer sleeve 2 is moved reversely, the free ends of the elastic expansion flaps 3 are separated from each other to release the constraint force on the elastic expansion flaps, so that the expansion flaps 3 can be in the expansion state again, the expansion flaps 3 in the expansion state can stretch and expand the foreskin under the elastic action force, and the prepuce opening is expanded to not wrap the glans penis any more, so that the treatment purpose is achieved. The outer sleeve 2 is also provided with an adjusting device which adjusts the distance between the outer sleeve 2 and the first limiting ring 11 and controls the opening of the elastic expansion valve 3; after the adjusting device adjusts and makes the distance of the outer sleeve 2 far away from the first limit ring 11, the free ends of the elastic expansion flaps 3 are rather made to approach each other, namely, the elastic force of the expansion flaps is restrained or limited; thereby avoiding the pain caused by the elastic force of the expansion flap 3 acting on the foreskin of the patient; for example, when the dilator is used for treatment, the outer sleeve 2 is adjusted to the most far end relative to the first limit ring 11, the expansion force of the expansion flap 3 is the smallest, and then the outer sleeve 2 can be gradually adjusted to the first limit ring 11 through the adjusting device according to the expansion condition of the preputial orifice to enhance the expansion force, and simultaneously, the tolerance or adaptation process is provided for the patient.

As shown in fig. 2, in a preferred embodiment, the adjusting device comprises a telescopic sleeve 6, and the telescopic sleeve 6 is sleeved outside the outer sleeve 2; an internal thread is arranged in the telescopic sleeve 6, an external thread is arranged on the outer wall of the outer sleeve 2, and the external thread and the internal thread are matched with each other and can adjust the telescopic sleeve 6 to extend or shorten relative to the outer sleeve 2. When the telescopic sleeve 6 is rotated clockwise, the telescopic sleeve extends out from the end part of the outer sleeve 2 and abuts against the first limiting ring 11, so that the outer sleeve 2 is pushed away from the position far away from the first limiting ring 11 and drives the expansion valve 3 to move together, and the elastic force of the expansion valve 3 is restrained. Otherwise, the restraint of the elastic force of the expansion flap 3 is released.

In another embodiment, the adjusting device comprises a telescopic sleeve 6 and can slide up and down relative to the outer sleeve 2, one or more grooves (not shown) are annularly arranged on the inner wall of the telescopic sleeve 6, the grooves are arranged at intervals along the axial direction of the telescopic sleeve 6, and the outer wall of the outer sleeve 2 is provided with positioning balls (not shown), and the grooves and the positioning balls are matched with each other to adjust the distance of the telescopic sleeve 6 extending or shortening relative to the outer sleeve 2. When the aperture of expander is adjusted to needs, slip telescope tube 6, when recess on the 6 inner walls of telescope tube corresponds with the location marble, the location marble is embedded into the recess under the effect of elastic force in, can accomplish the locking of telescope tube 6 and outer tube 2, only need overcome when needs readjustment the resistance of location marble can.

In another embodiment, the adjusting device comprises a telescopic sleeve 6 and can slide up and down relative to the outer sleeve 2, and a fastening bolt (not shown) is arranged on the outer telescopic sleeve 6 and is screwed with the telescopic sleeve 6; when the opening of the expander needs to be adjusted, the telescopic sleeve 6 is slid to a proper position, and then the tightening bolt is screwed down, namely, the end part of the tightening bolt is abutted against the outer wall of the outer sleeve 2, so that the telescopic sleeve 6 is locked on the outer sleeve 2; when the adjustment needs to be carried out again, the elastic bolts are loosened.

In a preferred embodiment, as shown in fig. 2, a grip portion 23 is further disposed on an end of the outer sleeve 2 away from the first stop collar 11, the grip portion 23 is circumferentially disposed around the outer sleeve 2 and integrally formed with the outer sleeve 2, and the grip portion 23 is used for facilitating the grip of the hand and adjusting the telescopic sleeve 6. The side wall of the outer sleeve and/or the outer wall of the telescopic sleeve 6 are/is also provided with adjusting marks. If arrows rotating leftwards and rightwards, plus signs and minus signs are respectively arranged on the outer wall of the telescopic sleeve 6; namely, the expansion force of the elastic expansion valve 3 of the dilator is reduced by rotating the telescopic sleeve 6 to the left, and the expansion force of the elastic expansion valve 3 of the dilator is enhanced by rotating the telescopic sleeve 6 to the right; wherein, the outer surface of the outer sleeve is also provided with marks in the shapes of 1, 2 and 3, which indicate that the expansion force of the expander is increased from low to high in sequence, thereby being beneficial to improving the operation or use convenience of the expander.

As shown in fig. 1 and 2, in a preferred embodiment, a return spring 4 is further sleeved outside the inner tube 1, the return spring 4 is located between the outer sleeve 2 and the second limit ring 12, and two ends of the return spring respectively abut against the outer sleeve and the second limit ring. After the reset spring 4 is arranged, when the force applied to the expander and enabling the expansion valve 3 to be in the furled state is released, the reset spring 4 can push the outer sleeve 2 to move towards the first limiting ring 11 under the action of elastic force, so that the expander is automatically in the expanded state without manual operation and can be switched to the expanded state, and the convenience of the operation of the expander is further improved.

As shown in fig. 1 to 3, in a preferred embodiment, a portion of the elastic expansion flap 3 near the second end of the elastic expansion flap 3 is located outside the inner tube 1 and clamped between the inner tube 1 and the outer sleeve 2, a plurality of through holes 13 corresponding to the plurality of elastic expansion flaps 3 are formed in the wall of the inner tube 1, and the inclined portion 35 is inserted into the inner tube 1 through the corresponding through holes 13. The through hole 13 is annularly arranged along the inner wall of the inner tube 1, and the through hole 13 is positioned at the end part close to the first limiting ring 11; or the through hole 13 extends towards the radial direction of the first limit ring 11; or the through hole 13 is directly arranged on the first limit ring 11 in a surrounding mode. Wherein the number of through holes 13 corresponds to the number of resilient expansion flaps 3, and each expansion flap 3 protrudes from each through hole 13, respectively. In the above embodiment, the ring of the elastic expansion flap 3 is arranged on the periphery of the inner tube 1, one end of the expansion flap 3 is fixed with the outer sleeve 2, and the other end, namely the free end, extends out of the through hole 13 and is far away from one end of the inner tube 1, at this time, the through hole 13 can play a role of binding the elastic expansion flap 3, namely, the expansion flap 3 is folded or expanded by taking the through hole 13 as a base point; at the same time, the through hole 13 can also reduce the stability of the expansion flap 3, i.e. two points at the connection fixing point of the expansion flap 3 and the through hole 13 can define a line, so that the offset of the expansion flap 3 relative to the folding or expansion direction is reduced when the force is applied.

As shown in fig. 1, 2 and 6, in a preferred embodiment, the elastic expansion flap 3 includes an expansion claw 31, a leg 32 and a support arm 33, one end of the leg 32 is fixedly connected to the outer tube 2, the other end is connected to one end of the support arm 33, the other end of the support arm 33 away from the leg 32 is inclined in a radial direction away from the first stop collar 11, one end of the expansion claw 31 is connected to the other end of the support arm 33, and the other ends of the plurality of expansion claws 31 form an expansion opening 34 around the central axis of the inner tube 1. The elastic expansion flap 3 is formed by bending an elastic metal wire, such as a steel wire or a titanium wire; of course, it is also possible to use the plate-like resilient expansion flaps 3 directly, i.e. the expansion flaps 3 are formed by bending steel or titanium sheets. When in use, the expansion claw 31 extends into the foreskin from the opening of the foreskin and forms a support for the foreskin, and the support arm 33 provides an elastic force for the expansion and stretching of the foreskin.

As shown in fig. 2, 4 and 5, in a preferred embodiment, the outer sleeve 2 is provided with a plurality of pin holes 21 for fixing the elastic expansion petals 3 and pin blocks 5 fitted to the pin holes 21, the pin holes 21 are arranged at intervals in the axial direction of the outer sleeve 2, the number of the pin holes 21 corresponds to the number of the expansion petals 3, and the pin blocks 5 are inserted into the pin holes 21 and fixed to the outer sleeve 2 with respect to the legs 32 of the expansion petals 3. The side wall of one side in the pin hole 21 is also provided with a flange 22, the flange 22 and the outer sleeve 2 are integrally formed through injection molding, and the pin block 5 is also provided with a positioning hole 51 corresponding to the flange 22. The one side that lies in its thickness direction on round pin piece 5 still is provided with stopper 52, and stopper 52 is the strip setting and sets up along the length direction of round pin piece 5, and the both sides of stopper 52 still are provided with respectively along the bellied bellying 53 of stopper 52 width direction, and bellying 53 and stopper 52 and round pin piece 5 integrated into one piece, wherein, still be provided with the kink 34 of mutually supporting with bellying 53 at the tip of landing leg 32. The use of the pin block 5 in cooperation with the pin hole 21 to secure the resilient expansion flap 3 facilitates replacement of the expansion flap 3 or sterilization and maintenance of the dilator. When in use, the bent parts 34 on the supporting legs 32 of the expansion valve 3 are clamped on the limiting blocks of the pin blocks 5 and are meshed with the convex parts 53, then the pin blocks 5 are inserted into the pin holes 21 of the outer sleeve 2, and the flanges 22 in the pin holes 21 are clamped into the positioning holes 51 on the pin blocks 5, so that the fixation of the elastic expansion valve 3 can be completed; when disassembly is required, only a force is required to be applied to the expansion flap 3 to enable the pin block 5 to be disengaged from the pin hole 21. Of course, the fixation of the expansion flap 3 to the outer sleeve 2 can also be effected in the same way, for example by fastening the expansion flap to the outer sleeve 2 by means of screws, but only with the aid of tools, such as screwdrivers, for mounting the expansion flap 3 or for dismounting the expansion flap 3.

The invention has the following beneficial effects: because the outer sleeve capable of reciprocating along the inner tube is arranged, and the expansion petals are annularly arranged and connected on the outer sleeve, when the outer sleeve moves downwards relative to the inner tube, the expansion petals can be pulled downwards to move, and the expansion petals in an open state are contracted towards the central axis of the inner tube under the action of the tube diameter of the inner tube, namely, the inconvenience of pinching and closing the expansion petals by fingers when the dilator is used for surgery is avoided, so that the convenience of using the dilator is improved; when the expansion valve needs to be released, only the outer sleeve needs to be pushed upwards.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A phimosis dilator, characterized in that: including inner tube, outer tube and a plurality of elasticity expansion lamella, the outer tube housing is in outside the inner tube, the inner tube for the outer tube can be followed the axis direction reciprocating motion of inner tube, the first end of elasticity expansion lamella is the free end, the second end with outer tube connection, the first end of elasticity expansion lamella certainly the first end of inner tube stretches out and extends to the direction department of keeping away from the inner tube, be formed with between the first end of elasticity expansion lamella and the second end for the slope of the axis slope of inner tube, the first end butt of inner tube the slope, the inner tube for the outer tube is followed during the axis direction reciprocating motion of inner tube, the first end of inner tube for the slope removal of elasticity expansion lamella makes the first end of a plurality of elasticity expansion lamella draws in or opens.

2. The phimosis dilator of claim 1, wherein: the inclined portion of the elastic expansion flap is outwards opened relative to the central axis of the inner tube, the first end of the inner tube is abutted to the inclined portion from the outer side, when the distance between the first end of the inner tube and the second end of the elastic expansion flap is increased, the first end of the elastic expansion flap is folded, and when the distance between the first end of the inner tube and the second end of the elastic expansion flap is decreased, the first end of the elastic expansion flap is opened.

3. The phimosis dilator of claim 1, wherein: the first end and the second end of the inner tube are respectively provided with a first limiting ring and a second limiting ring, the outer sleeve is arranged between the first limiting ring and the second limiting ring, and the first limiting ring is abutted against the inclined part of the elastic expansion valve;

and/or a plurality of fixing holes are also arranged on the second limiting ring along the circumferential direction of the second limiting ring.

4. The phimosis dilator of claim 3, wherein: the inner tube is also sleeved with a return spring, the return spring is positioned between the outer sleeve and the second limiting ring, and two ends of the return spring are respectively abutted to the outer sleeve and the second limiting ring.

5. The phimosis dilator of claim 1, wherein: the part of the elastic expansion flap close to the second end of the elastic expansion flap is positioned outside the inner tube and clamped between the inner tube and the outer sleeve, a plurality of through holes respectively corresponding to the elastic expansion flaps are formed in the tube wall of the inner tube, and the inclined part penetrates through the corresponding through holes and is inserted into the inner tube.

6. The phimosis dilator of claim 1, wherein: the elasticity expansion valve includes expansion claw, landing leg and support arm, the one end of landing leg is connected with the outer tube, and the other end is connected with the one end of support arm, the other end of keeping away from the landing leg on the support arm is to the radial direction slope of keeping away from first spacing ring, the one end of expansion claw is connected with the other end of support arm, and the other end of a plurality of expansion claws forms the expansion mouth around the axis of inner tube.

7. The phimosis dilator of claim 1, wherein: the elastic expansion flap is formed by bending an elastic metal wire.

8. The phimosis dilator of claim 1, wherein: the outer sleeve is annularly provided with a plurality of pin holes and pin blocks, the pin holes are used for fixing the elastic expansion flaps, the pin holes are arranged along the axial direction of the outer sleeve, and the pin blocks are inserted into the pin holes and are fixed to the expansion flaps.

9. The phimosis dilator of claim 8, wherein: the side wall of one side in the pin hole is also provided with a flange, the flange and the outer sleeve are integrally formed, and the pin block is also provided with a positioning hole with the flange corresponding to each other.

10. The phimosis dilator of claim 8, wherein: the one side that lies in its thickness direction on the round pin piece still is provided with the stopper, the stopper is the length direction setting of strip setting and edge round pin piece, and the both sides of stopper still are provided with the bellying respectively, bellying and stopper integrated into one piece still are provided with the kink of mutually supporting with the bellying at the tip of landing leg.

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