Phimosis dilator

Abstract

The present invention discloses a phimosis dilator, comprising an inner tube, an outer tube and a plurality of elastic expansion flaps, wherein the outer tube is sleeved outside the inner tube and can reciprocate along the axial direction of the inner tube, the first end of the elastic expansion flap is a free end, and the second end is connected to the outer tube, the first end of the elastic expansion flap extends from the first end of the inner tube and extends in a direction away from the inner tube, an inclined portion 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 limiting ring is provided at one end of the inner tube, the first limiting ring abuts against the inclined portion, the phimosis dilator also comprises an adjusting device, the adjusting device is movably connected to the outer tube, and can reciprocate and position relative to the outer tube along the axial direction of the inner tube, when the adjusting device reciprocates relative to the outer tube, the first limiting ring moves correspondingly relative to the inclined portion, and adjusts the opening of the first ends of the plurality of elastic expansion flaps; the phimosis dilator has the advantages of reasonable structure, adjustable opening and good applicability.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a phimosis dilator. Background Art

[0002] Phimosis is a common disease in children. Children with phimosis cannot turn the foreskin back to expose the urethral opening and glans penis due to the narrow foreskin opening or the adhesion of the foreskin to the glans penis. The current treatment methods for phimosis include circumcision and foreskin expansion. Circumcision is traumatic and the growth and development of children have not yet been finalized, so it is sometimes difficult to master the optimal degree of foreskin removal. At the same time, circumcision is a traumatic surgery that will cause great pain to the child, and the postoperative recovery period is relatively long and prone to postoperative complications. However, foreskin expansion surgery is non-invasive, rarely causes foreskin damage, does not affect the child's daily life and urination, and the pain of the operation is small. Children who undergo foreskin expansion surgery do not need to stay in bed, and are easily accepted by children and parents. Phimosis dilator is usually used to dilate the foreskin opening, but the phimosis dilator in the prior art is inconvenient to use or has poor applicability: we all know that the dilator opens the foreskin by the elastic force of the expansion flap, and the opening of the dilator in the prior art cannot be adjusted as needed, that is, the opening of the dilator cannot be adjusted to reduce the elastic expansion force of the expansion flap to give the patient a gradual adaptation or tolerance process, especially when the patient uses the dilator for the first time for dilation, the elastic force of the expansion flap is not restrained and acts on the foreskin, which still makes the patient appear more painful during the treatment. Therefore, the children often do not cooperate, which can easily cause psychological fear in the children. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a phimosis dilator with a reasonable structure, adjustable opening and good applicability.

[0004] In order to solve the above technical problems, the technical solution used in the present invention is:

[0005] A phimosis dilator comprises an inner tube, an outer tube and a plurality of elastic expansion flaps, wherein the outer tube is sleeved outside the inner tube, and the inner tube can reciprocate along the axial direction of the inner tube relative to the outer tube, the first end of the elastic expansion flap is a free end, and the second end is connected to the outer tube, the first end of the elastic expansion flap extends from the first end of the inner tube and extends in a direction away from the inner tube, an inclined portion 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, and a first limiting ring is provided at one end of the inner tube, and the first limiting ring abuts against the inclined portion, and the phimosis dilator also includes an adjusting device, which is sleeved outside the inner tube and the outer tube, and one end of the adjusting device abuts against the first limiting ring, the adjusting device is movably connected to the outer tube, and can reciprocate and position relative to the outer tube along the axial direction of the inner tube, and when the adjusting device reciprocates relative to the outer tube along the axial direction of the inner tube, the first limiting ring moves correspondingly relative to the inclined portion to adjust the opening of the first ends of the plurality of elastic expansion flaps.

[0006] Preferably, the adjustment device comprises a telescopic sleeve, which is arranged outside the outer sleeve, and an internal thread is arranged inside the telescopic sleeve. An external thread is arranged on the outer wall of the outer sleeve. The external thread and the internal thread cooperate with each other and can adjust the telescopic sleeve to extend or shorten relative to the outer sleeve.

[0007] Preferably, the adjustment device comprises a telescopic sleeve and can slide relative to the outer sleeve, the inner wall of the telescopic sleeve is surrounded by one or more grooves, the grooves are arranged at intervals along the axial direction of the telescopic sleeve, and the outer wall of the outer sleeve is provided with positioning marbles, the grooves and the positioning marbles cooperate with each other to adjust the distance that the telescopic sleeve is extended or shortened relative to the outer sleeve;

[0008] Alternatively, the adjusting device comprises a telescopic sleeve and can slide relative to the outer sleeve, and the outer sleeve is provided with a tension bolt, which is threadedly engaged with the outer sleeve and the end of the tension bolt is opposite to the outer wall of the outer sleeve.

[0009] Preferably, a gripping portion is further provided on one end of the outer sleeve away from the first limiting ring. The gripping portion is arranged circumferentially along the outer sleeve and is integrally formed with the outer sleeve.

[0010] Preferably, adjustment marks are also provided on the side wall of the outer sleeve and / or the outer wall of the telescopic sleeve.

[0011] Preferably, a second limiting ring is provided on the other end of the inner tube relative to the first limiting ring, and the second limiting ring is connected to the inner tube; and / or a plurality of fixing holes are provided on the second limiting ring along its circumference.

[0012] Preferably, a return spring is sleeved outside the inner tube, and the return spring is located between the outer sleeve and the second limiting ring.

[0013] Preferably, a plurality of through holes are arranged on the side wall of the inner tube near the end of the first limiting ring, and the through holes are located near the end of the first limiting ring; or the through holes extend in the radial direction of the first limiting ring, and the plurality of through holes cooperate with a plurality of expansion petals and each expansion petal extends from each through hole respectively.

[0014] Preferably, the elastic expansion flap includes an expansion claw, a leg and a support arm, one end of the leg is connected to the outer sleeve, and the other end is connected to one end of the support arm, the other end of the support arm away from the leg is inclined in a radial direction away from the first limiting ring, one end of the expansion claw is connected to the other end of the support arm, and the other ends of the multiple expansion claws form an expansion opening around the central axis of the inner tube.

[0015] Preferably, the outer sleeve is provided with a plurality of pin holes and pin blocks for fixing the elastic expansion flap, the pin holes are arranged along the axial direction of the outer sleeve, the pin blocks are inserted into the pin holes and fix the expansion flap;

[0016] A flange is also provided on the side wall of one side of the pin hole, and the flange is integrally formed with the outer sleeve, and positioning holes corresponding to the flanges are also provided on the pin block;

[0017] A limit block is also provided on one side of the pin block in the thickness direction. The limit block is arranged in a strip shape and along the length direction of the pin block, and protrusions are respectively provided on both sides of the limit block. The protrusions are integrally formed with the limit block, and a bending portion that cooperates with the protrusion is also provided at the end of the support leg.

[0018] The beneficial effects of the present invention are mainly reflected in the following: since an adjustment device is provided on the outer sleeve, the adjustment device adjusts the distance of the outer sleeve relative to the first limiting ring and thereby controls the initial opening of the elastic expansion flap, that is, the elastic force of the expansion flap is constrained or controlled by adjusting the opening and closing degree of the expansion flap, so that the expander can give the patient a gradual adaptation or tolerance process when used, reducing the pain of the patient when using the expander for treatment, and also improving the applicability of the expander. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0020] Figure 1It is a schematic diagram of the overall structure of a phimosis dilator in the present invention;

[0021] Figure 2 This is a structural exploded view of a phimosis dilator in the present invention;

[0022] Figure 3 A top view of an inner tube in a phimosis dilator of the present invention;

[0023] Figure 4 It is a schematic diagram of the top view of the outer sleeve in a phimosis dilator in the present invention;

[0024] Figure 5 It is a structural schematic diagram of a pin block in a phimosis dilator in the present invention;

[0025] Figure 6 It is a schematic structural diagram of an expansion valve in a phimosis expander in the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention. In the present embodiment, it should be understood that the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 cannot be understood as a limitation on the present invention; in addition, in the present specific embodiment, if the connection or fixing method between the components is not particularly specified, the connection or fixing method may be bolt fixing, welding fixing, pin fixing, etc. commonly used in the prior art, and therefore, it will not be described in detail in the present embodiment.

[0027] like Figure 1-4 , Figure 6As shown, this embodiment provides a phimosis dilator, including a hollow inner tube 1, an outer tube 2 and a plurality of elastic expansion flaps 3; wherein, the first ends of the plurality of elastic expansion flaps 3 are free ends, the second ends of the plurality of elastic expansion flaps 3 are circumferentially arranged along the outer tube 2 and fixed to the outer tube 2, the first end of the elastic expansion flap 3 extends from the first end of the inner tube 1 and extends in a direction away from the inner tube 1, and an inclined portion 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 to form an expanded state of the expansion flap 3. A first limiting ring 11 is provided at one end of the inner tube 1. The first limiting ring 11 is integrally formed with the inner tube 1 by injection molding or fixed by bolts, and the first limiting ring 11 abuts the inclined portion 35. The phimosis dilator also includes an adjusting device, which is sleeved outside the inner tube 1 and the outer sleeve 2, and one end of the adjusting device abuts against the first limiting ring 11. The adjusting device is movably connected to 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 moves correspondingly relative to the inclined portion 35 to adjust the opening of the first end of the multiple elastic expansion flaps. When the outer sleeve 2 moves downward along the inner tube 1 and relative to the first limiting ring 11, the free end of the expansion flap 3 can be driven to move toward the inner tube 1. At this time, the expansion flap 3 in the expanded state is constrained by the inner diameter of the inner tube 1, so that the free ends of the multiple elastic expansion flaps 3 can be close to each other, that is, the expander is in a retracted state, so as to facilitate the placement of the expansion flap 3 in the patient's foreskin opening; when the expansion flap 3 is inserted, the outer sleeve 2 is moved in the opposite direction, and the free ends of the multiple elastic expansion flaps 3 are moved away from each other to release the constraint force on the elastic expansion flap, so that the expansion flap 3 can be in the expanded state again. The expansion flap 3 in the expanded state can stretch and expand the foreskin under its elastic force, so that the foreskin opening is expanded and no longer covers the glans, thereby achieving the treatment purpose. The outer sleeve 2 is also provided with an adjustment device, which adjusts the distance of the outer sleeve 2 relative to the first limiting ring 11 and thereby controls the opening of the elastic expansion flap 3; when the adjustment device adjusts and makes the distance of the outer sleeve 2 away from the first limiting ring 11, it is equivalent to making the free ends of the plurality of elastic expansion flaps 3 close to each other, that is, constraining or limiting the elastic force of the support arm; thereby avoiding the pain caused by the elastic force of the expansion flap 3 acting on the patient's foreskin; when the dilator is used for treatment, the outer sleeve 2 is adjusted to the farthest end relative to the first limiting ring 11, at which time the expansion force of the expansion flap 3 is the smallest, and then the outer sleeve 2 can be gradually adjusted by the adjustment device to approach the first limiting ring 11 according to the expansion of the foreskin opening to enhance the expansion force, and at the same time, the patient is given a tolerance or adaptation process. Before the treatment of the dilator is completed, the child does not need to remove the phimosis dilator; for example, when the child needs to urinate during the treatment of the dilator, he can urinate directly, and the urine can flow out through the inner tube 1, thereby avoiding the removal of the dilator and improving the convenience of using the dilator.

[0028] like Figure 2 As shown, in a preferred embodiment, the adjustment device includes a telescopic sleeve 6, which is sleeved on the outer sleeve 2; an internal thread is provided inside the telescopic sleeve 6, and an external thread is provided on the outer wall of the outer sleeve 2, and the external thread and the internal thread cooperate 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 from the end of the outer sleeve 2 and abuts against the first limiting ring 11, thereby pushing the outer sleeve 2 away from the first limiting ring 11 and driving the expansion flap 3 to move together, thereby constraining the elastic force of the expansion flap 3. On the contrary, the constraint on the elastic force of the expansion flap 3 is released.

[0029] In another embodiment, the adjustment device includes a telescopic sleeve 6 and can slide up and down relative to the outer sleeve 2. One or more grooves (not shown) are 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. Positioning marbles (not shown) are arranged on the outer wall of the outer sleeve 2. The grooves and the positioning marbles cooperate with each other to adjust the distance of the telescopic sleeve 6 relative to the outer sleeve 2. When the opening of the expander needs to be adjusted, the telescopic sleeve 6 is slid. When the grooves on the inner wall of the telescopic sleeve 6 correspond to the positioning marbles, the positioning marbles are embedded in the grooves under the action of elastic force, and the locking of the telescopic sleeve 6 and the outer sleeve 2 can be completed. When it is necessary to adjust again, it is only necessary to overcome the resistance of the positioning marbles.

[0030] In another embodiment, the adjusting device includes a telescopic sleeve 6 and can slide up and down relative to the outer sleeve 2. A tensioning bolt (not shown) is provided on the outer telescopic sleeve 6, and the tensioning bolt is threadedly engaged with the telescopic sleeve 6. When it is necessary to adjust the opening of the expander, the telescopic sleeve 6 is slid to a suitable position and the tensioning bolt is tightened so that the end of the tensioning bolt is against the outer wall of the outer sleeve 2, thereby locking the telescopic sleeve 6 on the outer sleeve 2. When it is necessary to adjust again, the tensioning bolt is loosened and corresponding adjustments are made.

[0031] like Figure 2 As shown, in a preferred embodiment, a gripping portion 23 is further provided on one end of the outer sleeve 2 away from the first limiting ring 11. The gripping portion 23 is arranged along the circumference of the outer sleeve 2 and is integrally formed with the outer sleeve 2. The gripping portion 23 is convenient for hand gripping and adjusting the telescopic sleeve 6. Adjustment marks are also provided on the side wall of the outer sleeve and / or the outer wall of the telescopic sleeve 6. For example, arrows for rotating left and right, as well as plus and minus signs are respectively provided on the outer wall of the telescopic sleeve 6; that is, rotating the telescopic sleeve 6 to the left indicates reducing the expansion force of the elastic expansion flap 3 of the dilator, and rotating the telescopic sleeve 6 to the right indicates increasing the expansion force of the elastic expansion flap 3 of the dilator; wherein the outer surface of the outer sleeve is also provided with marks with the words "1, 2, 3", indicating that the expansion force of the dilator increases from low to high, thereby helping to improve the convenience of operation or use of the dilator.

[0032] like Figure 1 , 2 As shown, in a preferred embodiment, a second limiting ring 12 is further provided on the other end of the inner tube 1 relative to the first limiting ring 11, and the second limiting ring 12 is connected to the inner tube 1. In this embodiment, the second limiting ring 12 is detachably connected to the inner tube 1; that is, an internal thread is provided on the end of the inner tube 1 relative to the first limiting ring 11, and an external thread that cooperates with the internal thread is provided on the second limiting ring 12. The second limiting ring 12 is fixed to the inner tube 1 by screwing the internal and external threads. Of course, the second limiting ring 12 and the inner tube can also be fixed by gluing or bolts. The limiting rings provided at both ends of the inner tube 1 can constrain the upper and lower limit movement positions of the outer sleeve 2 to prevent the outer sleeve 2 from slipping off the inner tube 1. In this embodiment, a plurality of fixing holes 14 are further provided on the second limiting ring 12 along its circumference. The fixing holes 14 can be used to pass ropes or medical tapes so as to fix the expander on the child's body. When the expander is used for treatment, it often takes a certain amount of time to complete the treatment, and children are often lively and active by nature. By fixing the expander on the child's body through the cooperation of the fixing holes 14 and the ropes or medical tapes, the expander can be prevented from slipping out of the foreskin due to the child's movements and affecting the treatment effect of the expander.

[0033] like Figure 1 , Figure 2 As shown, in a preferred embodiment, a return spring 4 is further sleeved on the outer side of the inner tube 1, and the return spring 4 is located between the outer sleeve 2 and the second stop ring 12. After the return spring 4 is provided, when the force applied to the expander and causing the expansion petals 3 to be in a closed state is released, the return spring 4 can push the outer sleeve 2 to move toward the first stop ring 11 under the action of elastic force, so that the expander is automatically in an expanded state without manual operation and switching the expander to the expanded state, thereby improving the convenience of the expander operation.

[0034] like Figure 1 , Figure 2As shown, in a preferred embodiment, a plurality of through holes 13 are arranged on the side wall of the inner tube 1 near the end of the first limiting ring 11, and the through holes 13 are located near the end of the first limiting ring 11; or the through holes 13 extend in the radial direction of the first limiting ring 11; or the through holes 13 are directly arranged on the first limiting ring 11. The number of the through holes 13 is consistent with the number of the elastic expansion petals 3, and each expansion petal 3 extends from each through hole 13. In the above embodiment, the ring of the elastic expansion flap 3 is arranged on the outer circumference of the inner tube 1, and one end of the expansion flap 3 is fixed to the outer sleeve 2, and the other end, that is, the free end, extends from the through hole 13 and is away from one end of the inner tube 1. At this time, the through hole 13 can play a role in restraining the elastic expansion flap 3, that is, the expansion flap 3 is contracted or expanded with the through hole 13 as the base point; at the same time, the through hole 13 can also reduce the stability of the expansion flap 3, that is, the two points at the connection and fixing point of the expansion flap 3 and the through hole 13 can determine a line, so that when the expansion flap 3 is subjected to force, the position offset relative to the contraction or expansion direction is reduced.

[0035] like Figure 6 As shown, in a preferred embodiment, the elastic expansion flap 3 includes an expansion claw 31, a leg 32 and a support arm 33. In this embodiment, the inclined portion 35 of the expansion flap 3 forms the support arm 33. One end of the leg 32 is fixedly connected to the outer sleeve 2, and 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 limiting ring 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, a plate-shaped elastic expansion flap 3 can also be used, that is, the expansion flap 3 is formed by bending a steel sheet or a titanium sheet. When in use, the expansion claw 31 is extended into the foreskin from the opening of the foreskin and supports the foreskin, and the support arm 33 provides an elastic force for the expansion and stretching of the foreskin.

[0036] like Figure 2 , 4As shown in Figures 5 and 6, in a preferred embodiment, a plurality of pin holes 21 for fixing the elastic expansion flap 3 and a pin block 5 cooperating with the pin holes 21 are arranged on the outer sleeve 2. The pin holes 21 are arranged at intervals along the axial direction of the outer sleeve 2, and the number of the pin holes 21 is consistent with the number of the expansion flap 3. The pin block 5 is inserted into the pin hole 21 and fixes the leg 32 of the expansion flap 3 on the outer sleeve 2. A flange 22 is also provided on the side wall of one side of the pin hole 21. The flange 22 and the outer sleeve 2 are integrally formed by injection molding. The pin block 5 is also provided with positioning holes 51 corresponding to the flange 22. A limit block 52 is also provided on one side of the pin block 5 in the thickness direction thereof. The limit block 52 is provided in a strip shape and is provided along the length direction of the pin block 5. Both sides of the limit block 52 are provided with protrusions 53 protruding along the width direction of the limit block 52. The protrusions 53 and the limit block 52 are integrally formed with the pin block 5. A bending portion 34 cooperating with the protrusion 53 is also provided at the end of the leg 32. The use of the pin block 5 and the pin hole 21 to cooperate with each other to fix the elastic expansion flap 3 facilitates the replacement of the expansion flap 3 or the disinfection and maintenance of the expander after disassembly. When in use, the bent portion 34 on the leg 32 of the expansion flap 3 is clamped on the limit block of the pin block 5 and engaged with the protrusion 53, and then the pin block 5 is inserted into the pin hole 21 of the outer sleeve 2. When the flange 22 in the pin hole 21 is inserted into the positioning hole 51 on the pin block 5, the elastic expansion flap 3 can be fixed; when it needs to be disassembled, it is only necessary to apply a force to the expansion flap 3 to make the pin block 5 disengage from the pin hole 21. Of course, the expansion flap 3 can also be fixed to the outer sleeve 2 by fixing the expansion flap to the outer sleeve 2 with bolts, but it is necessary to use tools such as screwdrivers when installing or disassembling the expansion flap 3.

[0037] The beneficial effects of the present invention are mainly reflected in the following: since an adjustment device is provided on the outer sleeve, the adjustment device adjusts the distance of the outer sleeve relative to the first limiting ring and thereby controls the initial opening of the elastic expansion flap, that is, the elastic force of the expansion flap is constrained or controlled by adjusting the opening and closing degree of the expansion flap, so that the expander can give the patient a gradual adaptation or tolerance process when used, reducing the pain of the patient when using the expander for treatment, and also improving the applicability of the expander.

[0038] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A phimosis dilator, characterized in that: The invention comprises an inner tube, an outer tube and a plurality of elastic expansion flaps, wherein the outer tube is sleeved outside the inner tube, and the inner tube can reciprocate along the axial direction of the inner tube relative to the outer tube, the first end of the elastic expansion flap is a free end, and the second end is connected to the outer tube, the first end of the elastic expansion flap extends from the first end of the inner tube and extends in a direction away from the inner tube, an inclined portion 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, and a first limiting ring is provided at one end of the inner tube, and the first limiting ring abuts against the inclined portion, and the phimosis dilator also comprises an adjusting device, which is sleeved outside the inner tube and the outer tube, and one end of the adjusting device abuts against the first limiting ring, the adjusting device is movably connected to the outer tube, and can reciprocate and position relative to the outer tube along the axial direction of the inner tube, and when the adjusting device reciprocates relative to the outer tube along the axial direction of the inner tube, the first limiting ring moves correspondingly relative to the inclined portion to adjust the opening of the first ends of the plurality of elastic expansion flaps; A second limiting ring is also provided on the other end of the inner tube relative to the first limiting ring, and the second limiting ring is connected to the inner tube; And / or the second limiting ring is provided with a plurality of fixing holes along its circumference; The side wall of the inner tube near the end of the first limiting ring is also provided with a plurality of through holes, and the through holes are located near the end of the first limiting ring; or the through holes extend in the radial direction of the first limiting ring, and the plurality of through holes cooperate with the plurality of expansion petals and each expansion petal extends from each through hole respectively.

2. The phimosis dilator according to claim 1, characterized in that: The adjustment device includes a telescopic sleeve, which is arranged outside the outer sleeve. The telescopic sleeve is provided with an internal thread, and the outer wall of the outer sleeve is provided with an external thread. The external thread and the internal thread cooperate with each other and can adjust the telescopic sleeve to extend or shorten relative to the outer sleeve.

3. The phimosis dilator according to claim 1, characterized in that: The adjusting device comprises a telescopic sleeve and can slide relative to the outer sleeve. The inner wall of the telescopic sleeve is surrounded by one or more grooves, and the grooves are arranged at intervals along the axial direction of the telescopic sleeve. The outer wall of the outer sleeve is provided with positioning marbles, and the grooves and the positioning marbles cooperate with each other to adjust the distance of extension or shortening of the telescopic sleeve relative to the outer sleeve. Alternatively, the adjusting device comprises a telescopic sleeve and can slide relative to the outer sleeve, and the outer sleeve is provided with a tension bolt, which is threadedly engaged with the outer sleeve and the end of the tension bolt is opposite to the outer wall of the outer sleeve.

4. The phimosis dilator according to claim 2 or 3, characterized in that: A gripping portion is also provided on one end of the outer sleeve away from the first limiting ring. The gripping portion is arranged circumferentially along the outer sleeve and is integrally formed with the outer sleeve.

5. The phimosis dilator according to claim 2 or 3, characterized in that: Adjustment marks are also arranged on the side wall of the outer sleeve and / or the outer wall of the telescopic sleeve.

6. The phimosis dilator according to claim 1, characterized in that: A return spring is also sleeved outside the inner tube, and the return spring is located between the outer sleeve and the second limiting ring.

7. The phimosis dilator according to claim 1, characterized in that: The elastic expansion flap includes an expansion claw, a support leg and a support arm, one end of the support leg is connected to the outer sleeve, and the other end is connected to one end of the support arm, the other end of the support arm away from the support leg is inclined in a radial direction away from the first limiting ring, one end of the expansion claw is connected to the other end of the support arm, and the other ends of the multiple expansion claws form an expansion opening around the central axis of the inner tube.

8. The phimosis dilator according to claim 1, characterized in that: The outer sleeve is provided with a plurality of pin holes and pin blocks for fixing the elastic expansion flap, the pin holes are arranged along the axial direction of the outer sleeve, the pin blocks are inserted into the pin holes and fix the expansion flap; A flange is also provided on the side wall of one side of the pin hole, and the flange is integrally formed with the outer sleeve, and positioning holes corresponding to the flanges are also provided on the pin block; A limit block is also provided on one side of the pin block in the thickness direction. The limit block is arranged in a strip shape and along the length direction of the pin block, and protrusions are respectively provided on both sides of the limit block. The protrusions are integrally formed with the limit block, and a bending portion that cooperates with the protrusion is also provided at the end of the support leg.

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