Breast pump

Abstract

The breast pump comprises a milk collecting cup, a milk collecting cup body and a bra, the milk collecting cup body is provided with a cup body and a connecting ring fixed to the opening end of the cup body, the cup body is made of hard plastic materials, and the connecting ring is made of elastic soft materials; a breast tube of the bra is fixed at one end, far away from the cup body, of the connecting ring; the shell assembly comprises a shell body detachably connected with the connecting ring, an air nozzle and an air pump assembly; the stable ventilation plate comprises a plate body which covers the connecting ring and is detachably connected with the connecting ring, a milk inlet penetrating through the plate body, an air groove cup and a connecting pipe penetrating through the front face of the air groove cup; the milk tube is inserted into the connecting tube to form sealed connection; the elastic air bag is inserted into the air groove cup and covers one end of the connecting pipe; the elastic air bag is separated from the milk inlet and is hermetically connected with the opening end of the air groove cup; the shell abuts against the open end of the elastic air bag to form sealing, and the air nozzle is communicated with the elastic air bag. Compared with the prior art, the breast pump is simple in structure, long in service life and good in use convenience.

Description

Technical Field

[0001] The utility model relates to the technical field of maternal and infant products, and in particular to a breast pump for collecting breast milk. Background Art

[0002] Conventional breast pumps include a breast cavity and a cup mounted at the bottom of the cavity. A trumpet-shaped cup head is provided on the front of the cavity, connecting the cup head to the cavity. During use, the cup head of the breast pump is placed on the breast to collect milk into the cup body, while the entire breast pump is supported by a bra, thereby achieving the purpose of convenient use.

[0003] However, in related art breast pumps, the cup body design includes a cup cover, a channel extending from the bottom of the cup cover, an air groove located above and connected to the channel, an elastic suction disc located within the air groove, and a cup body located below the channel for collecting milk. The channel is divided into an upper suction channel and a lower milk channel. The suction channel is connected to the air groove. The elastic suction disc deforms to create a negative pressure within the air groove, which is then transmitted to the cup cover through the suction channel, squeezing the breast and causing milk to flow out and into the cup body through the milk channel. Although this structure has a good milk extraction effect, the suction channel and milk channel are located in the same channel. During suction, the negative pressure can also cause the suction channel to suck a small amount of milk into the air groove, making cleaning inconvenient. Moreover, the cup body is either made of hard plastic material, which requires great force when disassembling and assembling with other parts, and the hard friction during multiple disassembly and assembly causes great wear, thereby reducing the service life; or the cup body is made of flexible material, which is easy to disassemble and assemble with other parts, but is unstable when placed due to deformation due to force, resulting in poor convenience of use.

[0004] Therefore, it is necessary to provide a new breast pump to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a breast pump with a simple structure, a long service life and good convenience in use.

[0006] In order to solve the above technical problems, the present invention provides a breast pump, comprising:

[0007] A breast collecting cup, comprising a breast collecting cup body and a brassiere fixed to the front of the breast collecting cup body; the breast collecting cup body comprising a cup body and an annular connecting ring fixed to the open end of the cup body, the cup body being made of a hard plastic material, and the connecting ring being made of an elastic soft material; the brassiere comprising a milk duct fixed to an end of the connecting ring away from the cup body and extending horizontally, and a trumpet-shaped breast cup extending from the outer end of the milk duct to the outside of the breast collecting cup body;

[0008] A shell assembly, the shell assembly comprising a shell covering an end of the connecting ring away from the cup body and forming a detachable connection, an air nozzle provided through the shell, and an air pump assembly, the air pump assembly being connected to the air nozzle via an air pipe;

[0009] The stabilizing plate comprises a plate body which is covered on the connecting ring and whose periphery is detachably connected to the connecting ring, a milk inlet which passes through the plate body and is connected to the milk collecting cup body, a one-way valve which covers the milk inlet, an air groove cup which extends upward from the plate body and surrounds the milk inlet, and a connecting tube which passes through the front surface of the air groove cup and extends in an axial direction perpendicular to the air groove cup to an end of the connecting ring away from the cup body; the milk duct and the connecting tube form a detachable sealing connection; and,

[0010] An elastic airbag, which is inserted into the air groove cup and completely covers the end of the connecting tube close to the elastic airbag; the elastic airbag is spaced from the nipple inlet and its open end forms a detachable sealed connection with the open end of the air groove cup; the shell is pressed against the open end of the elastic airbag to form a seal, and the air nozzle is connected to the elastic airbag.

[0011] Preferably, the inner peripheral side of the connecting ring protrudes inward along its radial direction to form an annular connecting wall, the peripheral edge of the plate body is recessed to form an annular connecting groove, and the connecting wall is clamped in the connecting groove to form a detachable connection.

[0012] Preferably, the cup body and the connecting ring are formed into an integral structure by secondary injection molding.

[0013] Preferably, the cup body is transparent.

[0014] Preferably, the outer circumference of the milk tube is provided with an external thread, the inner circumference of the connecting tube is provided with an internal thread, and the external thread and the internal thread are screwed together to form a seal.

[0015] Preferably, the outer periphery of the milk duct protrudes near one end of the connecting tube to form a ring-shaped pattern, and the milk duct is inserted into the connecting tube and interference fits to form a sealed connection.

[0016] Preferably, the stabilizing plate further comprises a milk collecting groove extending downward from the plate body to the milk collecting cup body, the air groove cup is arranged around the milk collecting groove, the milk inlet is arranged through the bottom of the milk collecting groove, and the one-way valve is fixed to the bottom of the milk collecting groove.

[0017] Preferably, the one-way valve is made of elastic material, and includes a connecting column passing through the bottom of the milk collecting groove, a clamping wall formed on the side of the connecting column close to the elastic airbag, and a valve tongue formed on the side of the connecting column away from the elastic airbag. The valve tongue is attached to the side of the bottom of the milk collecting groove away from the elastic airbag and completely covers the milk inlet.

[0018] Preferably, the bottom of the milk collecting groove is higher in the middle and lower on the periphery, and the milk inlet is located in the peripheral area of ​​the bottom of the milk collecting groove.

[0019] Preferably, the breast milk collecting cup body further comprises a buffer layer formed at the bottom end of the connecting ring and extending from the cup body, the buffer layer is made of elastic soft material and is an integrally formed structure with the connecting ring.

[0020] Compared with the related art, the breast pump of the present invention designs the milk collection cup into a milk collection cup body and a brassiere for collecting milk, the milk collection cup body comprising a cup body and a ring-shaped connecting ring fixed to the open end of the cup body, the cup body being made of hard plastic material, and the connecting ring being made of elastic soft material; the brassiere comprising a milk tube fixed to one end of the connecting ring away from the cup body and extending horizontally, and a trumpet-shaped milk cup extending from the outer end of the milk tube to the outside of the milk collection cup body; a detachable sealing connection is formed by a stabilizing plate cover provided at the end of the connecting ring away from the cup body, so that the milk collection cup body forms a closed environment for collecting milk, and the milk tube of the brassiere and the connecting pipe of the stabilizing plate form a detachable sealing connection. Sealed connection, the air groove cup on the stabilizing plate is connected to the connecting pipe, and an elastic air bag is arranged in the air groove cup, and the gas in the elastic air bag is extracted by the air pump assembly to form a negative pressure, thereby forming a negative pressure in the connecting pipe and the milk duct, so as to achieve the purpose of sucking out the lotion. Since air suction and milk suction share the channel formed by the connecting pipe and the milk duct, the number of components is reduced, which not only has a simple structure but also is easy to clean; moreover, the outer shell and the stabilizing plate are installed to the cup body through a flexible connecting ring. Due to the flexibility of the connecting ring, the installation and disassembly of the outer shell and the stabilizing plate are simple and convenient, and the wear caused by hard friction during installation or disassembly is effectively reduced, and the service life is increased. At the same time, since the cup body is made of hard material, it is more stable and convenient to place. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in detail below with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description made with reference to the following drawings.

[0022] In the picture:

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the breast pump of the present invention;

[0024] Figure 2This is a schematic diagram of the partial three-dimensional structure of the breast pump of the present invention;

[0025] Figure 3 for Figure 1 Schematic diagram of the cross-section structure;

[0026] Figure 4 This is a structural schematic diagram of another embodiment of the right foot milker of the present utility model. DETAILED DESCRIPTION

[0027] The specific implementation of the present utility model is described in detail below with reference to the accompanying drawings.

[0028] The specific embodiments / examples described herein are specific embodiments of the present invention and are used to illustrate the concept of the present invention. They are illustrative and exemplary and should not be construed as limiting the embodiments and scope of the present invention. In addition to the examples described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the disclosure of the specification. These technical solutions, including any obvious replacements and modifications of the embodiments described herein, are all within the scope of protection of the present invention.

[0029] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention may be implemented. Directional terms used in this invention, such as up, down, front, back, left, right, inside, outside, and side, refer only to the directions in the accompanying drawings. Therefore, these directional terms are intended to illustrate and facilitate understanding of the present invention and are not intended to limit the present invention.

[0030] Please refer to Figure 1-3 As shown, the present invention provides a breast pump 100, comprising a milk collecting cup 1, a housing assembly 2, a stabilizing plate 3, and an elastic airbag 4.

[0031] The milk collecting cup 1 comprises a milk collecting cup body 11 for collecting milk and a bra 12 fixed to the front of the milk collecting cup body 11 .

[0032] The milk collecting cup 11 includes a cup body 111 and an annular connecting ring 112 fixed to the open end of the cup body 111 .

[0033] In this embodiment, the so-called front side refers to the side of the breast pump 100 facing the breast when the user is using it.

[0034] The bra 12 includes a horizontally extending milk tube 121 fixed to one end of the connecting ring 112 away from the cup body 111 and a trumpet-shaped milk cup 122 extending from the outer end of the milk tube 121 to the outside of the breast collecting cup body 11 .

[0035] In this embodiment, the milk collection cup 11 is made of two different materials. The cup body 111 is made of a hard plastic material, such as hard plastic, so that the breast pump 100 can stand upright stably when in use, which is more convenient. More preferably, the cup body 111 is transparent, that is, made of transparent hard plastic, which can make the changes in milk volume more intuitive and improve the user experience.

[0036] The connecting ring 112 is made of an elastic soft material, such as silicone or soft rubber, which makes it easier to assemble and disassemble the milk collecting cup 11 with other structures through the connecting ring 112, avoids hard friction between structures during assembly and disassembly, reduces structural wear, and increases service life.

[0037] The breast cup 11 and the bra 12 can be either integral or separate. In the case of a separate structure, the breast tube 121 of the bra 12 is designed to be directly pluggable or rotatably mounted on the end of the connecting ring 112 away from the cup body 111. In this embodiment, the cup body 111 and the bra 12 of the breast cup 1 are preferably integrally injection-molded, with the connecting ring 112 and the cup body 111 being further integrally molded through a secondary injection molding process. This effectively reduces the number of major components, simplifies the structure, and makes cleaning more convenient.

[0038] The breast cup 122 is trumpet-shaped, adapting to the breast. Its elastic material allows for a perfect fit and enhanced comfort. When the breast cup 122 is placed on the breast, the nipple is aligned with the milk duct 121. When negative pressure is generated within the milk duct 121, milk is drawn from the breast and flows through the milk duct 121 into the breast cup body 11 for collection. Because the breast cup 122 is made of an elastic material, it adapts to the breast as the breast position is adjusted, providing a certain degree of dynamic adjustment without causing milk leakage, thus enhancing reliability.

[0039] The shell assembly 2 is made of a hard material, and includes a shell 21 that covers the end of the connecting ring 112 away from the cup body 111 and forms a detachable connection, and an air nozzle 22 and an air pump assembly (not shown) arranged through the shell 21. The air pump assembly is connected to the air nozzle 22 through an air pipe.

[0040] The air pump assembly can be provided as a separate structure located outside the housing 21, or it can be provided inside the housing 21 and integrated into the breast pump 100 to form an integral structure, which is feasible.

[0041] The air pump assembly includes an air pump and a closed air switch valve. The air nozzle 22 includes an outlet nozzle 221 and an inlet nozzle 222, each connected to the elastic airbag 4. The air pump is connected to the outlet nozzle 221 via an air tube, which is used to extract air from the elastic airbag 4 to enable milk extraction. The closed air switch valve is connected to the inlet nozzle 222 via an air tube, which is used to introduce external air into the elastic airbag 4 when the air pump stops working, allowing the elastic airbag 4 to restore its elastic deformation. In other words, when the air pump is inhaling, the closed air switch valve closes; when the air pump stops inhaling, the closed air switch valve opens.

[0042] The stabilizing plate 3 includes a plate body 31 which covers the open end of the connecting ring 112 and whose periphery forms a detachable connection with the connecting ring 112, a milk inlet 32 ​​which passes through the plate body 31 and is connected to the milk collecting cup body 11, a one-way valve 33 which covers the milk inlet 32, an air groove cup 34 which extends upward from the plate body 31 and is arranged around the milk inlet 32, and a connecting pipe 35 which passes through the front surface of the air groove cup 34 and extends along an axial direction perpendicular to the air groove cup 34 to the end of the connecting ring 112 away from the cup body 111.

[0043] In this embodiment, the stabilizing plate 3 is made of a hard material.

[0044] The plate 31 engages with the connecting ring 112 via a snap-fit ​​structure, creating a sealed space within the milk collection cup 11 to prevent the collected milk from spilling. Specifically, the inner circumference of the connecting ring 112 protrudes radially inward to form an annular connecting wall 113. The circumference of the plate 31 is recessed to form an annular connecting groove 311. The connecting wall 113 is secured within the connecting groove 311 to form a detachable connection.

[0045] The milk tube 121 is detachably sealed to the connecting tube 35 , thereby forming a channel structure for collecting the milk.

[0046] The sealing connection between the milk tube 121 and the connecting tube 35 can be a plug-in connection or a rotation connection.

[0047] Specifically, in this embodiment, the outer circumference of the milk tube 121 is provided with an external thread, and the inner circumference of the connecting tube 35 is provided with an internal thread. The external thread and the internal thread are screwed together to form a seal. This structural design facilitates assembly and disassembly and has a good sealing performance. The insertion design of the milk tube 121 makes the channel structure for collecting milk higher in the front and lower in the back. The inner diameter of the milk tube 121 is smaller than that of the connecting tube 35, thus forming a stepped structure to prevent milk from flowing back into the milk cup 122, and improving reliability. This is a rotary connection method.

[0048] Alternatively, the outer periphery of the milk tube 121 protrudes near one end of the connecting tube 35 to form a ring-shaped pattern, and the milk tube 121 is inserted into the connecting tube 35 and interference fits to form a sealed connection, which is plug-in connection.

[0049] The elastic airbag 4 is inserted into the air tank cup 34 and completely covers the end of the connecting tube 35 close to the elastic airbag 4. The elastic airbag 4 is spaced from the milk inlet 32 ​​and its open end forms a detachable sealed connection with the open end of the air tank cup 34.

[0050] Preferably, the housing 21 presses against the open end of the elastic airbag 4 and forms a seal, further enhancing the sealing reliability. The air nozzle 22 is connected to the elastic airbag 4. The air pump assembly extracts air from the elastic airbag 4 through the air nozzle 22, which compresses and deforms the elastic airbag 4, thereby creating a negative pressure in the air tank cup 34. The negative pressure compresses the breast through the connecting tube 35, the milk duct 121, and the breast cup 122, thereby sucking out the milk. The milk flows through the milk duct 121 and the connecting tube 35 to the air tank cup 34, and then flows through the milk inlet 32 ​​at the bottom of the air tank cup 34 to the breast collection cup body 11. When the air pump assembly inhales air, creating a negative pressure within the air reservoir cup 34, the one-way valve 33 closes, allowing the milk to flow to the bottom of the air reservoir cup 34. When the air pump assembly stops inhaling, the elastic airbag 4 recovers its shape and fits against the connecting tube 35, forming a barrier that prevents the milk from flowing back into the connecting tube 35 and preventing milk leakage during movement. Simultaneously, as the negative pressure disappears, the one-way valve 33 loses its suction, allowing the milk to open under its own weight and flow into the milk collection cup 11.

[0051] To facilitate smoother milk collection, the stabilizing plate 3 further includes a milk collecting groove 36 extending downward from the plate body 31 into the milk collecting cup body 11. The air tank cup 34 surrounds the milk collecting groove 36, the milk inlet 32 ​​extends through the bottom of the milk collecting groove 36, and the one-way valve 33 is fixed to the bottom of the milk collecting groove 36. The design of the milk collecting groove 36 also allows the air tank cup 34 to better fit with the elastic airbag 4, making it easier to drain the milk in the air tank cup 34. It also better fits with the one-way valve 33, increasing air tightness.

[0052] In this embodiment, the one-way valve 33 is made of an elastic material. Specifically, the one-way valve 33 includes a connecting post 331 that extends through the bottom of the milk collecting groove 36, a retaining wall 332 formed on the side of the connecting post 331 that is closer to the elastic airbag 4, and a valve tongue 333 formed on the side of the connecting post 331 that is farther from the elastic airbag 4. The valve tongue 333 is attached to the side of the bottom of the milk collecting groove 36 that is farther from the elastic airbag 4 and completely covers the milk inlet 32.

[0053] Of course, the one-way valve 33 may also be a duckbill structure made of elastic material, and the principle is the same.

[0054] More preferably, the bottom of the milk collecting groove 36 is high in the middle and low on the periphery, and the milk inlet 32 ​​is located in the peripheral area of ​​the bottom of the milk collecting groove 36, which further improves the smoothness of the milk collection.

[0055] In this embodiment, the elastic airbag 4 is partially located within the milk collecting groove 36. A guide groove 41 is provided on the outer periphery of the elastic airbag 4. The guide groove 41 extends from the bottom of the elastic airbag 4 to two opposite side surfaces thereof. The portion of the guide groove 41 located on the side of the elastic airbag 4 is opposite to the connecting tube 35. The provision of the guide groove 41 effectively prevents the elastic airbag 4 from contracting incorrectly, guiding it to contract in the correct position to open the communication channel between the connecting tube 35 and the milk collecting groove 36, thereby improving breastfeeding reliability.

[0056] Please combine Figure 4 As shown, it is another embodiment of the present invention, which is the same as the above Figure 1-3 The embodiments are basically the same, except that: the milk collection cup body 11' also includes a buffer layer 113 formed at the bottom end of the connecting ring 112' and attached to the cup body 111'. The buffer layer 113 is made of elastic soft material and is an integrally formed structure with the connecting ring 112', that is, the buffer layer 113 is also made of soft glue or silicone. The buffer layer 113 can fully wrap the cup body 111', or only wrap a part of the cup body 111', such as only wrapping the outer periphery of the bottom of the cup body 111'. In this way, after the bottom of the cup body 111' is wrapped with the soft glue buffer layer 113, it is quieter when placed on the desktop, and the cup body 111' is more comfortable and friendly when picked up. At the same time, the integrally formed fitting surface is larger and more secure. Of course, it is also possible to selectively hollow out a specific position of the cup body 111' to expose, such as exposing a space for indicating the amount of milk. This is all feasible.

[0057] Compared with the related art, the breast pump of the present invention designs the milk collection cup into a milk collection cup body and a brassiere for collecting milk, the milk collection cup body comprising a cup body and a ring-shaped connecting ring fixed to the open end of the cup body, the cup body being made of hard plastic material, and the connecting ring being made of elastic soft material; the brassiere comprising a milk tube fixed to one end of the connecting ring away from the cup body and extending horizontally, and a trumpet-shaped milk cup extending from the outer end of the milk tube to the outside of the milk collection cup body; a detachable sealing connection is formed by a stabilizing plate cover provided at the end of the connecting ring away from the cup body, so that the milk collection cup body forms a closed environment for collecting milk, and the milk tube of the brassiere and the connecting pipe of the stabilizing plate form a detachable sealing connection. Sealed connection, the air groove cup on the stabilizing plate is connected to the connecting pipe, and an elastic air bag is arranged in the air groove cup, and the gas in the elastic air bag is extracted by the air pump assembly to form a negative pressure, thereby forming a negative pressure in the connecting pipe and the milk duct, so as to achieve the purpose of sucking out the milk. Since air suction and milk suction share the channel formed by the connecting pipe and the milk duct, the number of parts is reduced, which is not only simple in structure but also easy to clean. Moreover, the shell and the stabilizing plate are installed to the cup body through a flexible connecting ring. Due to the flexibility of the connecting ring, the installation and disassembly of the shell and the stabilizing plate are simple and convenient, and the wear caused by hard friction during installation or disassembly is effectively reduced, thereby improving the service life. At the same time, since the cup body is made of hard material, it is more stable and convenient to place.

[0058] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, 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 breast pump, characterized in that: include: A breast collecting cup, comprising a breast collecting cup body and a brassiere fixed to the front of the breast collecting cup body; the breast collecting cup body comprising a cup body and an annular connecting ring fixed to the open end of the cup body, the cup body being made of a hard plastic material, and the connecting ring being made of an elastic soft material; the brassiere comprising a milk duct fixed to an end of the connecting ring away from the cup body and extending horizontally, and a trumpet-shaped breast cup extending from the outer end of the milk duct to the outside of the breast collecting cup body; A shell assembly, the shell assembly comprising a shell covering an end of the connecting ring away from the cup body and forming a detachable connection, an air nozzle provided through the shell, and an air pump assembly, the air pump assembly being connected to the air nozzle via an air pipe; The stabilizing plate comprises a plate body which is covered on the connecting ring and whose periphery is detachably connected to the connecting ring, a milk inlet which passes through the plate body and is connected to the milk collecting cup body, a one-way valve which covers the milk inlet, an air groove cup which extends upward from the plate body and surrounds the milk inlet, and a connecting tube which passes through the front surface of the air groove cup and extends in an axial direction perpendicular to the air groove cup to an end of the connecting ring away from the cup body; the milk duct and the connecting tube form a detachable sealing connection; and, An elastic airbag, which is inserted into the air groove cup and completely covers the end of the connecting tube close to the elastic airbag; the elastic airbag is spaced from the nipple inlet and its open end forms a detachable sealed connection with the open end of the air groove cup; the shell is pressed against the open end of the elastic airbag to form a seal, and the air nozzle is connected to the elastic airbag.

2. The breast pump according to claim 1, wherein: The inner circumference of the connecting ring protrudes inward along its radial direction to form an annular connecting wall, and the peripheral edge of the plate body is recessed to form an annular connecting groove. The connecting wall is clamped in the connecting groove to form a detachable connection.

3. The breast pump according to claim 1, wherein: The cup body and the connecting ring are formed into an integral structure through secondary injection molding.

4. The breast pump according to claim 1, wherein: The cup body is transparent.

5. The breast pump according to claim 1, wherein: The outer circumference of the milk tube is provided with an external thread, and the inner circumference of the connecting pipe is provided with an internal thread, and the external thread and the internal thread are screwed together to form a seal.

6. The breast pump according to claim 1, wherein: The outer periphery of the milk duct protrudes near one end of the connecting tube to form a ring-shaped pattern, and the milk duct is inserted into the connecting tube and interference fits to form a sealed connection.

7. The breast pump according to claim 1, wherein: The stabilizing plate also includes a milk collecting groove extending downward from the plate body to the milk collecting cup body, the air groove cup is arranged around the milk collecting groove, the milk inlet is arranged through the bottom of the milk collecting groove, and the one-way valve is fixed to the bottom of the milk collecting groove.

8. The breast pump according to claim 7, wherein: The one-way valve is made of elastic material, and includes a connecting column passing through the bottom of the milk collecting groove, a clamping wall formed on the side of the connecting column close to the elastic airbag, and a valve tongue formed on the side of the connecting column away from the elastic airbag. The valve tongue is attached to the side of the bottom of the milk collecting groove away from the elastic airbag and completely covers the milk inlet.

9. The breast pump according to claim 8, characterized in that The bottom of the milk collecting groove is higher in the middle and lower on the periphery, and the milk inlet is located in the peripheral area of ​​the bottom of the milk collecting groove.

10. The breast pump according to claim 1, wherein: The milk collecting cup body further comprises a buffer layer formed at the bottom end of the connecting ring and extending from the cup body. The buffer layer is made of elastic soft material and is an integrally formed structure with the connecting ring.

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