Negative pressure penile erection aid

Abstract

The present invention provides a negative-pressure penile erection aid that can be worn during sexual intercourse, assists in achieving an erection, and can maintain an erection for an extended period. [Solution] The negative pressure penile erection aid 1 comprises a rigid inner layer body 2, a soft outer shell body 3 provided on the outside of the inner layer body, an opening 4 for inserting the penis, and a sealing flange portion 5 provided in the opening. The inner layer body has a cylindrical portion 21 for inserting the penis, and a ventilation hole a is provided at the tip of the cylindrical portion that connects the outside and inside of the inner layer body. The outer shell body has an external shape similar to a penis, with a glans 31 and a cylindrical portion formed therein, and a ventilation hole b is provided at the glans 31 that connects the outside and inside of the outer shell body. A pressure reducing check valve 6 is provided between the ventilation hole of the inner layer body and the ventilation hole of the outer shell body, and the pressure reducing check valve are in communication with each other, so that the internal space of the inner layer body can be depressurized and negative pressure can be maintained.

Description

Technical Field

[0001] This invention relates to a negative pressure penile erection assist device for men.

Background Art

[0002] Erection occurs when blood flows into the corpora cavernosa of the penis. When the amount of blood flowing into the corpora cavernosa of the penis increases, the penis becomes erect, and the erection state can be maintained by keeping the corpora cavernosa of the penis in a congested state.

[0003] Diseases such as diabetes and arteriosclerosis, mental stress, aging, etc. can cause erectile dysfunction (ED: Errectile Dysfunction). In order to improve these erectile dysfunctions, negative pressure erection assist devices are known.

[0004] For example, in Patent Document 1, by reducing the pressure inside a cylinder into which the male genitalia is inserted, blood is forcibly attracted to the blood vessels in the cavernous tissue of the male genitalia, and a part of the erected male genitalia is constricted by the expanded blood vessels to prevent the reflux of the above blood and maintain the erection state. In a clamping member used for an erection assisting device for male genitalia, the clamping member main body is formed of an elastic gel material made of synthetic resin, and a through hole having a diameter with sufficient elastic contraction force to prevent the reflux of the above blood when expanded is formed in the central portion of the clamping member main body. A clamping member for an erection assisting device for male genitalia is disclosed.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Negative pressure erection aids work by inserting the penis into a cylinder and creating negative pressure inside the cylinder to promote blood flow into the corpus cavernosum of the penis. When engaging in sexual activity after erection, the aid must be removed, but there is a problem that blood flows out of the corpus cavernosum after removal, making it difficult to maintain the erection. Another method is to wear a cock ring at the base of the penis to prevent blood from flowing out of the corpus cavernosum, but the process of removing the aid and putting on the cock ring at the base of the penis can ruin the mood of sexual activity. Furthermore, since negative pressure is not maintained during this process, there is a problem that the erection cannot be maintained for a long time. This invention has been made in view of the above-mentioned problems, and aims to provide a novel negative-pressure penile erection aid that can be worn during sexual intercourse, assists in erection, and can maintain an erection for a longer period of time. [Means for solving the problem]

[0007] The negative pressure penile erection aid of the present invention, which has been able to solve the aforementioned problems, is a negative pressure penile erection aid that can be used while wearing it, and comprises a hard inner layer body, a soft outer shell body provided on the outside of the inner layer body, an opening for inserting the penis, and a sealing flange portion provided in the opening, wherein the inner layer body has a tubular portion for inserting the penis, and a ventilation hole (a) is provided at the tip of the tubular portion that connects the outside and inside of the inner layer body. The outer shell has an external shape similar to a penis, with a glans and a tubular portion formed therein. The glans is provided with a ventilation hole (b) that connects the outside and inside of the outer shell. A pressure-reducing check valve is provided between the ventilation hole (a) of the inner layer and the ventilation hole (b) of the outer shell. The ventilation hole (a) of the inner layer, the ventilation hole (b) of the outer shell, and the pressure-reducing check valve are in communication, allowing the internal space of the inner layer to be depressurized and negative pressure to be maintained. [Effects of the Invention]

[0008] This invention provides the following beneficial effects. The negative pressure penile erection aid of this invention is equipped with a pressure-reducing check valve, which allows for unidirectional pressure reduction in the internal space into which the penis is inserted, maintaining negative pressure. As a result, the negative pressure penile erection aid of this invention can assist in penile erection and maintain an erect state for a longer period of time. Furthermore, because the erect and enlarged penis adheres firmly to the inner wall of the negative pressure penile erection aid due to the negative pressure (i.e., the negative pressure penile erection aid is anchored to the penis), the negative pressure penile erection aid does not detach from the penis, allowing for sexual intercourse while wearing it. The negative-pressure penile erection aid of this invention has a soft outer shell and a hard inner layer, allowing it to maintain its shape (rigidity) while providing a texture similar to human skin. As a result, even if the erection of the penis is not firm enough, the negative-pressure penile erection aid of this invention allows sexual intercourse to proceed while providing a good quality of sexual intercourse for the woman. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1(a) is a schematic front view of the negative pressure penile erection aid of the present invention, and Figure 1(b) is a schematic side view thereof. [Figure 2] This is a schematic cross-sectional view of line II-II in Figure 1(a). [Figure 3] This is a schematic cross-sectional diagram illustrating an example of an inner layer. [Figure 4] This is a schematic cross-sectional diagram illustrating an example of an outer shell. [Figure 5] This is a schematic diagram of a portion of the sealing flange. [Figure 6] This is a schematic cross-sectional view showing another embodiment of the negative pressure penile erection aid of the present invention. [Figure 7] This is a schematic cross-sectional view showing another embodiment of the negative pressure penile erection aid of the present invention. [Figure 8] This is a schematic diagram illustrating an example of a pressure reducing pump. [Modes for carrying out the invention]

[0010] The negative pressure penile erection aid of the present invention is a negative pressure penile erection aid that can be used while wearing it, and comprises a hard inner layer body, a soft outer shell body provided on the outside of the inner layer body, an opening for inserting the penis, and a sealing flange portion provided in the opening, wherein the inner layer body has a cylindrical portion for inserting the penis, and a ventilation hole (a) is provided at the tip of the cylindrical portion that connects the outside and inside of the inner layer body, the outer shell body has an external shape similar to a penis with a glans head and a cylindrical portion formed thereon, and a ventilation hole (b) is provided in the glans head that connects the outside and inside of the outer shell body, a pressure reducing check valve is provided between the ventilation hole (a) of the inner layer body and the ventilation hole (b) of the outer shell body, and the pressure reducing check valve are in communication with each other, thereby reducing the internal space of the inner layer body and maintaining negative pressure.

[0011] The negative pressure penile erection aid of the present invention (hereinafter sometimes referred to as the "erection aid") will be described below with reference to the drawings, but the erection aid of the present invention is not limited to the embodiments shown in the drawings.

[0012] Figure 1(a) is a schematic front view of the erection aid 1 of the present invention, and Figure 1(b) is a schematic side view thereof. Figure 2 is a schematic cross-sectional view taken along line II-II in Figure 1(a). In the erection aid 1 of the present invention, the glans side may be referred to as the tip side, and the side with an opening for inserting the penis may be referred to as the posterior end side.

[0013] As shown in Figures 1 and 2, the erection aid 1 of the present invention has a hard inner layer body 2 and a soft outer shell body 3 provided on the outside of the inner layer body 2.

[0014] FIG. 3 is a schematic cross-sectional view for explaining an example of the inner layer body 2. The inner layer body 2 is a rigid member for maintaining the rigidity of the erectile assist device 1, and has a cylindrical portion 21 for inserting the penis. At the tip of the cylindrical portion 21, a vent hole (a) that communicates the outside and the inside of the inner layer body 2 is provided. The cylindrical portion 21 forms an internal space 24 for inserting the penis, and the vent hole (a) is configured to communicate with a vent hole (b) of the outer casing 3 and a pressure reducing check valve 6 described later.

[0015] The tip of the cylindrical portion 21 is preferably a substantially hemispherical curved surface portion. The inner diameter or outer diameter of the cylindrical portion 21 (excluding the curved surface portion) may be the same or different from the tip side to the rear end side. For example, the inner diameter or outer diameter may be formed to decrease or increase from the tip side to the rear end side. Also, the wall thickness of the cylindrical portion 21 may be the same or different from the tip side to the rear end side. For example, the wall thickness may be formed to become thinner or thicker from the tip side to the rear end side.

[0016] Although not particularly limited, the length of the cylindrical portion 21 (excluding the curved surface portion) is preferably 10 cm or more and 18 cm or less. The wall thickness of the cylindrical portion 21 is preferably 1 mm or more and 1.5 mm or less. The inner diameter of the cylindrical portion 21 is preferably 35 mm or more and 45 mm or less.

[0017] The vent hole (a) is preferably provided at the central portion of the tip of the cylindrical portion 21 (that is, the central portion of the curved surface portion). Examples of the shape of the vent hole (a) include a circular shape and a rectangular shape, and a circular shape is preferred. The diameter of the vent hole (a) (in the case of a rectangular shape, the diameter of the circumscribed circle) is not particularly limited, but is preferably 3 mm or more and 4 mm or less.

[0018] It is preferable that a pedestal 22 for installing a vacuum check valve 6 described later is provided outside the tip of the cylindrical portion 21 of the inner layer body 2. The pedestal 22 preferably has an open tip side and is a part of the tip of the cylindrical portion 21 including a vent hole (a) on the rear end side. The pedestal 22 forms a space for accommodating the vacuum check valve 6. By providing the pedestal 22, the vacuum check valve 6 can be firmly fixed between the vent hole (a) of the inner layer body 2 and the vent hole (b) of the outer casing 3, so that the decompression and negative pressure maintenance of the internal space 24 can be more reliably performed. The pedestal 22 is preferably provided outside the central portion of the tip of the cylindrical portion 21. Its dimensions may be selected according to the dimensions of the vacuum check valve 6 to be used. The pedestal 22 is preferably integrally formed with the cylindrical portion 21.

[0019] An outer edge portion 23 that constitutes a part of a sealing flange portion 5 described later may be provided on the rear end side of the cylindrical portion 21 of the inner layer body 2. The outer edge portion 23 is preferably integrally formed with the cylindrical portion 21. That is, the outer edge portion 23 is preferably formed such that the rear end side of the cylindrical portion 21 extends outward in the radial direction (the side opposite to the center line side). In this case, the angle formed by the outer edge portion 23 and the wall of the cylindrical portion 21 may be 90°C or may not be 90°C. Further, the outer shape of the outer edge portion 23 is not particularly limited, and examples include a circular shape, an elliptical shape, a rectangular shape, etc., but a circular shape is preferable.

[0020] The inner layer 2 is preferably made of a relatively hard material. The Shore A hardness of the material forming the inner layer 2 is preferably 50 or higher, more preferably 55 or higher, and even more preferably 65 or higher. Furthermore, there is no particular upper limit to the Shore A hardness of the material forming the inner layer 2, but for example, it is preferably 75, more preferably 73, and even more preferably 72. If the Shore A hardness of the material forming the inner layer 2 is within the above range, the erection aid 1 of the present invention will have high rigidity and will be able to maintain its shape even when depressurized or during sexual intercourse. In addition, the erection aid 1 of the present invention will be less likely to bend when inserted into the female genitalia. In this invention, the Shore A hardness can be measured, for example, according to ASTM D 2240.

[0021] The material used to form the inner layer 2 is not particularly limited, but examples include thermoplastic resins such as cycloolefin copolymer (COC) and polypropylene (PP). The thermoplastic resin is preferably of a grade used in medical applications. The inner layer 2 is preferably integrally molded from the thermoplastic resin, and more preferably formed by injection molding. The inner layer 2 may be formed from either a transparent or opaque resin.

[0022] Figure 4 is a schematic cross-sectional view illustrating an example of the outer shell 3. The outer shell 3 is a soft material provided on the outside of the inner layer 2 and has an external shape similar to a penis, with a glans 31 and a cylindrical portion 32. A ventilation hole (b) is provided inside the glans 31, connecting the outside and inside of the outer shell 3. The cylindrical portion 32 forms an internal space 34 that accommodates the cylindrical portion 21 of the inner layer 2, and the ventilation hole (b) is configured to communicate with the ventilation hole (a) of the inner layer 2 and the pressure reducing check valve 6.

[0023] The shape of the glans portion 31 is not particularly limited as long as it resembles the glans of the penis, and is preferably a gentle shape such as hemispherical or glans-shaped, with a glans-shaped shape being particularly preferred. The glans portion 31 is preferably integrally molded with the cylindrical portion 32.

[0024] Conventional negative-pressure erection aids have a protruding or convex connection port at the tip for connecting to a decompression pump, making it impossible to perform sexual intercourse while wearing them. In contrast, the erection aid 1 of the present invention does not have a protrusion like the aforementioned connection port on the tip surface of the glans 31, so sexual intercourse can be performed without worrying about injuring the female genitalia.

[0025] The inner diameter and length of the cylindrical portion 32 should be formed to match the outer diameter and length of the cylindrical portion 21 of the inner layer body 2. For example, the inner diameter of the cylindrical portion 32 is preferably 37 mm or more and 48 mm or less. The length of the cylindrical portion 32 is preferably 10 cm or more and 18 cm or less. The wall thickness of the cylindrical portion 32 is not particularly limited, but is preferably 2 mm or more and 3 mm or less. The wall thickness and outer diameter of the cylindrical portion 32 may be the same from the front end to the rear end, or they may differ.

[0026] The ventilation hole (b) is preferably provided in the central part of the glans penis 31, extending from the tip to the posterior end. The diameter of the ventilation hole (b) is not particularly limited, but is preferably 3 mm or more and 4 mm or less. The length of the ventilation hole (b) is not particularly limited, but is preferably 18 mm or more and 20 mm or less.

[0027] Preferably, the outer shell 3 is provided with a space 33 for accommodating the base 22 of the inner layer 2 shown in Figure 3. The front and rear ends of the space 33 are in contact with ventilation holes (b) and (a), respectively. The dimensions of the space 33 can be selected according to the dimensions of the base 22.

[0028] The outer shell 3 is preferably colored to resemble a penis, for example. It is also preferable that the appearance of the outer shell 3 resembles that of a penis. For example, a radially recessed constriction 311 or folds can be provided on the glans 31 (for example, the side closer to the tip of the tubular portion 21 of the inner layer 2), or the tubular portion 32 can be given a shape in which blood vessels are visible (not shown). The outer shell 3 is preferably detachably attached to the outside of the inner layer 2.

[0029] The outer shell 3 is preferably made of a relatively soft material. The Shore A hardness of the material forming the outer shell 3 is preferably 10 or higher, more preferably 11 or higher, even more preferably 12 or higher, preferably 20 or lower, more preferably 15 or lower, and even more preferably 13 or lower. If the Shore A hardness of the material forming the outer shell 3 is within the above range, the outside of the erection aid 1 will be soft and will have a skin-like feel.

[0030] The material used to form the outer shell 3 is not particularly limited, but examples include silicone rubber and thermoplastic elastomer (TPE). The silicone rubber and thermoplastic elastomer are preferably of medical grade. The outer shell made of silicone rubber can be formed, for example, by curing a curable silicone composition containing a silicone oligomer having alkoxysilyl groups and / or dimethylpolysiloxane having silanol groups or vinyl groups at its ends.

[0031] As shown in Figure 2, the erection aid 1 of the present invention is further provided with a pressure reducing check valve 6 between the ventilation hole (a) of the inner layer 2 and the ventilation hole (b) of the outer shell 3. The pressure reducing check valve 6 is configured such that its front and rear ends are in contact with the ventilation hole (b) of the outer shell 3 and the ventilation hole (a) of the inner layer 2, respectively, and communicate with these ventilation holes (a) and (b).

[0032] The pressure reducing check valve 6 can reduce the pressure in the internal space 24 of the inner layer 2 by using a pressure reducing pump to expel air from the internal space 24 of the inner layer 2 through the vent hole (b) to the outside of the erection aid 1 (unidirectional exhaust), but it can also restrict the inflow of air from the outside into the internal space 24, thereby maintaining negative pressure in the internal space 24. As a result, the erection aid 1 of this invention can assist in the erection of the penis and maintain the erect state for a long time. Furthermore, because the erect and enlarged penis adheres firmly to the inner wall of the erection aid 1 due to the negative pressure (i.e., the erection aid 1 is anchored to the penis), the erection aid 1 does not detach from the penis, and sexual intercourse can be performed while wearing it.

[0033] The pressure reducing check valve 6 is not particularly limited as long as it is capable of reducing the internal space 24 when exhausting to the outside with the valve open, and when not exhausting, the valve is closed, restricting the inflow of air from the outside into the internal space 24 and maintaining negative pressure in the internal space 24. The pressure reducing check valve 6 is not particularly limited and examples include a lift-type pressure reducing check valve, a swing-type pressure reducing check valve, or a disc-type pressure reducing check valve, and it is preferable to use one with a diameter of about 8 mm.

[0034] As shown in Figures 1 and 2, the erection aid 1 of the present invention has an opening 4 for inserting the penis. The opening 4 is provided on the rear end side of the cylindrical portion 21 of the inner layer body 2 and the cylindrical portion 32 of the outer shell body 3. The shape of the opening 4 is preferably a circle with a radius of 2.2 cm or more and 3.9 cm or less.

[0035] The erection aid 1 of this invention has a sealing flange portion 5 provided in the opening 4. The sealing flange portion 5 can maintain a negative pressure state in the internal space 24 (perform a sealing function) by adhering closely to the skin of the lower abdomen at the base of the penis during sexual intercourse.

[0036] Preferably, the sealing flange portion 5 is formed from the outer edge portion 23 on the rear end side of the inner layer body 2 and the sealing means 51, or is integrally molded with the cylindrical portion 32 of the outer shell body 3.

[0037] Figure 2 shows an embodiment in which the sealing flange portion 5 is formed from the outer edge portion 23 on the rear end side of the inner layer body 2 and the sealing means 51. Figure 5 is an enlarged schematic view of a part of the sealing flange portion 5 in Figure 2.

[0038] The outer shape of the sealing means 51 should be formed to match the outer diameter of the outer edge portion 23. The sealing means 51 is particularly preferably ring-shaped with an opening in the center for inserting the penis. The thickness of the sealing means 51 is preferably 2 mm or more, more preferably 2.5 mm or more, preferably 3.5 mm or less, and more preferably 3 mm or less.

[0039] The sealing means 51 is preferably made of a relatively soft material to enhance adhesion. The Shore A hardness of the material forming the sealing means 51 is preferably 10 or higher, more preferably 11 or higher, even more preferably 12 or higher, preferably 20 or lower, more preferably 19 or lower, and even more preferably 18 or lower. If the Shore A hardness of the material forming the sealing means 51 is within the above range, the adhesion between the sealing flange portion and the skin of the man's lower abdomen will be enhanced.

[0040] The material used to form the adhesion means 51 is not particularly limited, but examples include silicone rubber and thermoplastic elastomer (TPE). Medical-grade silicone rubber and thermoplastic elastomer are preferred.

[0041] The adhesion means 51 is preferably fixed to the outer edge 23 of the inner layer 2 by, for example, double-sided tape or adhesive. The double-sided tape or adhesive is preferably of a grade used for medical applications.

[0042] Figure 6 is a schematic cross-sectional view illustrating a modified example of the erection aid 1 of the present invention. Figure 6 shows an embodiment in which the sealing flange portion 5 is integrally molded with the cylindrical portion 32 of the outer shell 3. That is, the sealing flange portion 5 is formed so that the rear end side of the cylindrical portion 32 of the outer shell 3 extends radially inward (towards the center line) and encloses the rear end of the cylindrical portion 21 of the inner layer 2. In this embodiment, the thickness of the sealing flange portion 5 may be the same or different, but it is preferable that it becomes progressively or continuously thinner toward the radial inward.

[0043] As shown in Figures 2 and 3, the erection aid 1 of the present invention preferably has an anti-suction means 7 installed on the tip side of the internal space 24 of the inner layer 2. The anti-suction means 7 is a means to prevent the tip of the penis from being sucked into the ventilation hole (a) when the internal space 24 of the inner layer 2 is depressurized. The anti-suction means 7 is not particularly limited as long as it prevents the tip of the penis from being sucked into the ventilation hole (a) without preventing the depressurization of the internal space 24, and examples include grid-shaped, slit-shaped, sieve-shaped, filter-shaped spacers with many small holes, and breathable sponges. Of these, a breathable sponge is preferred because it is easy to dispose of.

[0044] When using the spacer as the suction prevention means 7, it is preferable to fix the peripheral edge of the spacer to the inside of the cylindrical portion 21 of the inner layer body 2 with an adhesive or the like. Also, when using the sponge as the suction prevention means 7, it is preferable to insert a sponge that is slightly larger than the inner diameter of the cylindrical portion 21 of the inner layer body 2 into the cylindrical portion 21 of the inner layer body 2.

[0045] The suction prevention means 7 is preferably made of a relatively soft material. The Shore A hardness of the material forming the suction prevention means 7 is preferably 10 or higher, more preferably 12 or higher, even more preferably 15 or higher, preferably 20 or lower, more preferably 18 or lower, and even more preferably 16 or lower. If the Shore A hardness of the material forming the suction prevention means 7 is within the above range, it is possible to prevent injury to the penis even when it comes into contact with it.

[0046] Figure 7 is a schematic cross-sectional view illustrating another modified example of the erection aid 1 of the present invention. While the erection aid 1 of the present invention shown in Figures 1 to 6 is linear overall, as shown in Figure 7, the erection aid 1 of the present invention may be curved upward. By curving the erection aid 1 upward, the sensation it provides when it comes into contact with the female genitalia can be altered.

[0047] Furthermore, in the embodiments shown in Figures 1 to 6, the glans 31 (excluding the ventilation hole b and space 33) is solid, but as shown in Figure 7, the glans 31 may be provided with multiple air holes 312 to reduce its weight. It is preferable that the air holes 312 are evenly distributed around the ventilation hole (b). The number of air holes 312 is not particularly limited, but for example, it is preferable to have two or more and six or fewer, and more preferably four. By providing air holes 312, the overall weight balance of the erection aid 1 can be achieved.

[0048] The erection aid 1 of this invention is not particularly limited, but it is preferable that its total length is 18 cm or more and 21 cm or less, and the wall thickness of the cylindrical part is 3 mm or more and 4.5 mm or less. The wall thickness of the cylindrical part of the erection aid 1 corresponds to the total wall thickness of the cylindrical part 21 of the inner layer body 2 and the cylindrical part 32 of the outer shell body 3.

[0049] The use of the erection aid 1 of this invention will now be explained. First, the penis is inserted into the cylindrical portion 21 of the inner layer 2 of the erection aid 1, and the sealing flange portion 5 of the erection aid 1 is brought into close contact with the skin of the lower abdomen at the base of the penis. Then, the internal space 24 is depressurized using a depressurization pump. The depressurization pump can be either manual or electric. Figure 8 is a schematic diagram illustrating an example of a manual depressurization pump. The manual depressurization pump 8 shown in Figure 8 has a handle 81, a trigger 82, a pump core 83, a connecting tube 84, and an air intake port 85. By precisely aligning the air intake port 85 of the depressurization pump 8 with the vent hole (b) of the erection aid 1, and pulling the trigger 82 with a finger while gripping the handle 81 of the depressurization pump 8, depressurization can be performed. When depressurizing, lubricant may be applied to the sealing flange portion 5 to improve the seal against the human body.

[0050] The reduced pressure causes blood to flow into the corpus cavernosum of the penis, resulting in an erection. After the penis is erect, the air intake port 85 of the decompression pump 8 is removed. The erection aid 1 of this invention is equipped with a decompression check valve 6, so even after the decompression pump 8 is removed, the negative pressure in the internal space 24 can be maintained, and the penis can remain erect.

[0051] After sexual intercourse (after ejaculation), the pressure can be released by peeling the sealing flange 5 away from the body, and the erection aid 1 can be removed. The removed erection aid 1 can be cleaned and reused. [Explanation of Symbols]

[0052] 1: Negative pressure penile erection aid, 2: Inner layer, 21: Cylindrical part, 22: Base, 23: Outer edge, 24: Internal space, a: Ventilation hole, 3: Outer shell, 31: Glans, 311: Constriction, 312: Cavity, 32: Cylindrical part, 33: Space, 34: Internal space, b: Ventilation hole, 4: Opening, 5: Sealing flange, 51: Sealing means, 6: Pressure reducing check valve, 7: Suction prevention means, 8: Manual pressure reducing pump, 81: Handle, 82: Trigger, 83: Pump core, 84: Connecting tube, 85: Air intake port, CL: Centerline

Claims

1. A negative pressure penile erection aid that allows sexual intercourse to be performed while wearing it, It has a rigid inner layer, a soft outer shell provided on the outside of the inner layer, an opening for inserting the penis, and a sealing flange provided in the opening. The inner layer has a tubular portion for inserting the penis, and a ventilation hole (a) is provided at the tip of the tubular portion, which connects the outside and inside of the inner layer. The outer shell has an external shape similar to a penis, with a glans head and a tubular portion, and the glans head is provided with a ventilation hole (b) that connects the outside and inside of the outer shell. A pressure reducing check valve is provided between the ventilation hole (a) of the inner layer and the ventilation hole (b) of the outer shell. A negative pressure penile erection aid is characterized in that the ventilation holes (a) of the inner layer, the ventilation holes (b) of the outer shell, and the pressure reducing check valve are in communication, thereby reducing the internal space of the inner layer and maintaining negative pressure.

2. The negative pressure penile erection aid according to claim 1, wherein the inner layer body is provided with a base for installing a pressure reducing check valve on the outside of the tip of its cylindrical portion.

3. The negative pressure penile erection aid according to claim 1, wherein the outer shell is detachably provided on the outside of the inner layer.

4. The negative pressure penile erection aid according to claim 1, wherein the Shore A hardness of the inner layer is 50 to 75, and the Shore A hardness of the outer shell is 10 to 20.

5. The negative pressure penile erection aid according to claim 1, wherein the sealing flange portion is formed from the outer edge portion on the rear end side of the inner layer body and a sealing means, or is integrally molded with the cylindrical portion of the outer shell body.

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