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 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 the first end of the inner tube abuts against the inclined portion, and when the inner tube reciprocates along the axial direction of the inner tube relative to the outer tube, the first end of the inner tube moves relative to the inclined portion of the elastic expansion flap, so that the first ends of the plurality of elastic expansion flaps are retracted or opened; the phimosis dilator has the advantages of reasonable structure and convenient operation and use.

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 are not yet finalized, so it is sometimes difficult to grasp the optimal degree of foreskin removal. At the same time, circumcision is a traumatic surgery that will cause great pain to the patient, 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 patient's daily life and urination, and the pain of the operation is small. Patients undergoing foreskin expansion surgery do not need to rest in bed, and children and parents are easy to accept. Phimosis dilator is usually used to dilate the foreskin opening, but the phimosis dilator in the prior art has the problem of inconvenience in operation or use: when using the dilator for dilation treatment, the doctor needs to pinch the elastic expansion flap fixed on the base to shrink it, and then insert the expansion flap into the foreskin, and finally release the expansion flap. The expansion flap expands the foreskin under its own elastic force; and there are often multiple expansion flaps. During the operation, the doctor needs to pinch and close it with one hand, and the other hand only cooperates to guide it into the foreskin. The operation process is not completed overnight, which often requires the doctor to pinch the expansion flap for a long time, which can easily make the hand muscles tired or stiff, thereby bringing certain inconveniences to the doctor's operation; especially if one is not careful, one of the expansion flaps will often be not effectively restrained and pop out, which may damage the foreskin or increase the patient's pain. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a phimosis dilator which has a reasonable structure and is easy to operate and use.

[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 the first end of the inner tube abuts against the inclined portion, and when the inner tube reciprocates along the axial direction of the inner tube relative to the outer tube, the first end of the inner tube moves relative to the inclined portion of the elastic expansion flap, so that the first ends of the plurality of elastic expansion flaps are retracted or opened.

[0006] Preferably, the inclined portion of the elastic expansion flap opens outward relative to the central axis of the inner tube, and the first end of the inner tube abuts the inclined portion from the outside. When the distance between the first end of the inner tube and the second end of the elastic expansion flap increases, the first end of the elastic expansion flap is retracted, and when the distance between the first end of the inner tube and the second end of the elastic expansion flap decreases, the first end of the elastic expansion flap opens.

[0007] 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, the first limiting ring abuts against the inclined portion of the elastic expansion flap; and / or the second limiting ring is also provided with a plurality of fixing holes along its circumference.

[0008] Preferably, a return spring is sleeved outside the inner tube, the return spring is located between the outer sleeve and the second limiting ring, and two ends of the return spring abut against the outer sleeve and the second limiting ring respectively.

[0009] Preferably, the portion of the elastic expansion flap 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 tube, and a plurality of through holes corresponding to the plurality of elastic expansion flaps are opened on the tube wall of the inner tube, and the inclined portion passes through the corresponding through holes and is inserted into the inner tube.

[0010] 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.

[0011] Preferably, the elastic expansion flap is formed by bending an elastic metal wire.

[0012] 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, and the pin blocks are inserted into the pin holes to fix the formation of the expansion flap.

[0013] Preferably, a flange is provided on the side wall on one side of the pin hole, the flange is integrally formed with the outer sleeve, and positioning holes corresponding to the flanges are provided on the pin block.

[0014] Preferably, a limit block is 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 leg.

[0015] The beneficial effects of the present invention are mainly reflected in the following aspects: since an outer sleeve that can reciprocate along the inner tube is provided, and multiple expansion valve rings are arranged and connected to the outer sleeve, when the outer sleeve moves downward relative to the inner tube, the expansion valve can be pulled downward to move, and the expansion valve in the open state is constrained by the diameter of the inner tube and shrinks toward the central axis, that is, when using the expander for surgery, there is no need to pinch and close the multiple expansion valves with fingers, thereby improving the convenience of using the expander; when the expansion valve needs to be released, it is only necessary to push the outer sleeve upward. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a schematic diagram of the overall structure of a phimosis dilator in the present invention;

[0018] Figure 2 This is an incomplete exploded view of a phimosis dilator in the present invention;

[0019] Figure 3 A top view of an inner tube in a phimosis dilator of the present invention;

[0020] Figure 4 It is a schematic diagram of the top view of the outer sleeve in a phimosis dilator in the present invention;

[0021] Figure 5 It is a structural schematic diagram of a pin block in a phimosis dilator in the present invention;

[0022] Figure 6 It is a schematic structural diagram of an expansion valve in a phimosis expander in the present invention. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1-4As shown in Figures 6, the present embodiment provides a phimosis dilator, comprising an inner tube 1, an outer tube 2 and a plurality of elastic expansion flaps 3, wherein the plurality of elastic expansion flaps 3 are arranged in a ring along the circumferential direction of the outer tube 2, the first end of the elastic expansion flap 3 is a free end, and the second end of the elastic expansion flap 3 is detachably connected to the outer tube 2; wherein 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, the first end of the inner tube 1 abuts against the inclined portion 35, and when the inner tube 1 reciprocates relative to the outer tube 2 along the axial direction of the inner tube 1, the first end of the inner tube 1 moves relative to the inclined portion 35 of the elastic expansion flap 3, so that the first ends of the plurality of elastic expansion flaps 3 are retracted or opened. The inclined portion 35 of the elastic expansion flap 3 is opened outward relative to the central axis of the inner tube 1, and the first end of the inner tube 1 abuts the inclined portion 35 from the outside. When the distance between the first end of the inner tube 1 and the second end of the elastic expansion flap 3 increases, the first end of the elastic expansion flap 3 is retracted, and when the distance between the first end of the inner tube 1 and the second end of the elastic expansion flap 3 decreases, the first end of the elastic expansion flap 3 is opened; specifically, when the outer sleeve 2 moves downward along the inner tube 1, it can drive the expansion flap 3 to move. 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 shrinks into the inner tube 1 so that the free ends of the multiple elastic expansion flaps 3 are close to each other, that is, the expander is in a retracted state, so that the expansion flap 3 is conveniently placed in the opening of the patient's foreskin; after 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, so that the expansion flap 3 is in the expanded state again, and 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. Since the doctor does not need to pinch and close the multiple expansion flaps 3 by hand as in the traditional way during the use of the dilator, it is avoided that the doctor pinches the expansion flaps 3 for a long time, which may cause fatigue or stiffness of the hand muscles, thereby improving the convenience of the dilator when in use; it also avoids the expansion flaps 3 not being effectively restrained and popping out when the doctor operates the dilator, which may damage the patient's foreskin or increase the patient's pain. In this embodiment, four expansion flaps 3 are set to achieve uniform expansion of the foreskin in multiple directions, that is, the expansion is gentle and the patient's pain is relatively small. Of course, if 2, 3, or 5 expansion flaps 3 are set, the expansion effect can also be achieved. 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 the dilator during use.

[0025] In a preferred embodiment, the inclined portion 35 of the elastic expansion flap 3 can also be retracted inwardly relative to the central axis of the inner tube 1, and the first end of the inner tube 1 abuts the inclined portion 35 from the outside. When the distance between the first end of the inner tube 1 and the second end of the elastic expansion flap 3 increases, the first end of the elastic expansion flap 3 is retracted, and when the distance between the first end of the inner tube 1 and the second end of the elastic expansion flap 3 decreases, the first end of the elastic expansion flap 3 expands.

[0026] like Figure 1 , 2 As shown, in a preferred embodiment, the first limiting ring 11 and the second limiting ring 12 are respectively provided at both ends of the inner tube 1, and the outer tube 2 is provided between the first limiting ring 11 and the second limiting ring 12, and the first limiting 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 by injection molding, and of course the first limiting ring 11 and the inner tube 1 can also be fixed by gluing or bolting. In this embodiment, the second limiting ring 12 is detachably connected to the inner tube 1; that is, the inner tube 1 is provided with an internal thread at the end relative to the first limiting ring 11, and the second limiting ring 12 is provided with an external thread that cooperates with the internal thread, and the second limiting ring 12 is fixed to the inner tube 1 by screwing the internal and external threads, and of course the second limiting ring 12 and the inner tube can also be fixed by gluing or bolting. The limiting rings provided at both ends of the inner tube 1 can constrain the upper and lower limit movement positions of the outer tube 2, prevent the outer tube 2 from slipping off the inner tube 1, and improve the convenience of using the dilator. 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 to the child's body through the ropes or medical tapes. 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. After the expander is fixed to the child's body through the cooperation of the fixing holes 14 and ropes or the medical tape and the fixing holes 14, 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.

[0027] In a preferred embodiment, the phimosis dilator may further include a damping device, which may include a positioning marble arranged in the outer sleeve 2, and a plurality of grooves arranged in a ring on the outer wall of the inner tube 1, wherein the grooves are arranged at intervals along the axial direction of the inner tube 1, and the positioning marbles and the grooves match each other. The damping device can reduce the flexibility of the outer sleeve sliding along the inner tube, so that the elastic expansion flap 3 can be opened gradually in a controllable manner under the drive of the outer sleeve 2, thereby avoiding the patient's inability to adapt to or tolerate the expansion force of the dilator when the elastic expansion flap 3 opens after the force loaded on the elastic expansion flap 13 is released, thereby increasing the patient's pain.

[0028] In a preferred embodiment, the phimosis dilator also includes an adjusting device, which is sleeved on the outside of the inner tube 1 and the outer tube 2, and one end of the adjusting device is abutted against the first limiting ring 11. The adjusting device is movably connected to the outer tube 2, and can reciprocate and position relative to the outer tube 2 along the axial direction of the inner tube 1. When the adjusting device reciprocates relative to the outer tube 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 limit 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 that it is convenient to place 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 to achieve the treatment purpose. An adjusting device is also provided on the outer sleeve 2, 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 adjusting device adjusts and makes the distance of the outer sleeve 2 away from the first limiting ring 11, the free ends of the plurality of elastic expansion flaps 3 are brought close to each other, that is, the elastic force of the expansion flap is constrained or limited; thereby avoiding the pain caused by the elastic force of the expansion flap 3 acting entirely on the patient's foreskin; when using the dilator 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 adjusting device to approach the first limiting ring 11 according to the expansion condition of the foreskin opening to enhance the expansion force, while also giving the patient a tolerance or adaptation process.

[0029] 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.

[0030] 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.

[0031] 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 abutted 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 can be loosened.

[0032] 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.

[0033] like Figure 1 , Figure 2 As shown, in a preferred embodiment, a return spring 4 is also 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, and the two ends of the return spring abut against the outer sleeve and the second stop ring respectively. After the return spring 4 is provided, when the force applied to the expander and making the expansion petal 3 in the retracted 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 the expanded state without manual operation and switching the expander to the expanded state, thereby improving the convenience of the expander operation.

[0034] like Figure 1-3 As shown, in a preferred embodiment, the part of the elastic expansion flap 3 close to 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 tube 2. A plurality of through holes 13 corresponding to the plurality of elastic expansion flaps 3 are opened on the tube wall of the inner tube 1, and the inclined portion 35 passes through the corresponding through holes 13 and is inserted into the inner tube 1. The through holes 13 are arranged along the inner wall of the inner tube 1, and the through holes 13 are located near the end of the first limiting ring 11; or the through holes 13 are opened and 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. Among them, the number of through holes 13 is consistent with the number of elastic expansion flaps 3, and each expansion flap 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 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 offset outside the contraction or expansion direction is reduced.

[0035] like Figure 1 , Figure 2 , 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, 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 the 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 directly, 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. 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, to install or disassemble the expansion flap 3.

[0037] The beneficial effects of the present invention are mainly reflected in the following aspects: since an outer sleeve that can reciprocate along the inner tube is provided, and multiple expansion valve rings are arranged and connected to the outer sleeve, when the outer sleeve moves downward relative to the inner tube, the expansion valve can be pulled downward to move, and the expansion valve in the open state is constrained by the diameter of the inner tube and shrinks toward the central axis, that is, when using the expander for surgery, there is no need to pinch and close the multiple expansion valves with fingers, thereby improving the convenience of using the expander; when the expansion valve needs to be released, it is only necessary to push the outer sleeve upward.

[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, the first end of the inner tube abuts against the inclined portion, and when the inner tube reciprocates along the axial direction of the inner tube relative to the outer tube, the first end of the inner tube moves relative to the inclined portion of the elastic expansion flap, so that the first ends of the plurality of elastic expansion flaps are folded or opened; 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 abuts against the inclined portion of the elastic expansion valve; And / or the second limiting ring is also provided with a plurality of fixing holes along its circumference; The portion of the elastic expansion flap 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 tube. A plurality of through holes corresponding to the plurality of elastic expansion flaps are opened on the tube wall of the inner tube. The inclined portion passes through the corresponding through holes and is inserted into the inner tube.

2. The phimosis dilator according to claim 1, characterized in that: The inclined portion of the elastic expansion flap is opened outward relative to the central axis of the inner tube, and the first end of the inner tube abuts against the inclined portion from the outside. When the distance between the first end of the inner tube and the second end of the elastic expansion flap increases, the first end of the elastic expansion flap is retracted, and when the distance between the first end of the inner tube and the second end of the elastic expansion flap decreases, the first end of the elastic expansion flap is opened.

3. The phimosis dilator according to claim 1, characterized in that: A return spring is also sleeved outside the inner tube. The return spring is located between the outer sleeve and the second limiting ring, and two ends of the return spring abut against the outer sleeve and the second limiting ring respectively.

4. 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.

5. The phimosis dilator according to claim 1, characterized in that: The elastic expansion flap is formed by bending an elastic metal wire.

6. 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.

7. The phimosis dilator according to claim 6, characterized in that: A flange is also provided on the side wall on one side of the pin hole, and the flange is integrally formed with the outer sleeve. Positioning holes corresponding to the flanges are also provided on the pin block.

8. The phimosis dilator according to claim 6, characterized in that: 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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