Earplug

Abstract

The invention relates to an earplug which comprises an insertion piece, an operation piece, a connecting piece and a valve assembly installed in the connecting piece. The insertion piece is provided with a first cavity; the operating part is provided with a second cavity, and fluid is contained in the second cavity. The connecting piece is provided with a hollow channel; the valve assembly comprises a movable sleeve, a first sealing ring, an adjusting rod arranged in the movable sleeve in a penetrating mode, a second sealing ring and an inner elastic piece. An outer gap channel is arranged between the outer wall of the movable sleeve and the inner wall of the connecting piece, and the outer gap channel is communicated with the second cavity; an inner gap channel is formed between the outer wall of the adjusting rod and the outer wall of the movable sleeve and communicates with the first cavity. The first sealing ring is installed at the end, close to the inserting piece, of the movable sleeve and used for switching the communicating or closing state of the outer gap channel and the first cavity. The second sealing ring is installed at the end, close to the operating piece, of the adjusting rod and used for switching the communicating or closing state of the inner gap channel and the second cavity. The earplug can be worn for a long time and is stable and comfortable.

Description

Technical Field

[0001] The present invention relates to the field of earplugs, and in particular to a waterproof and noise-proof earplug that is stable and comfortable to wear. Background Art

[0002] Earplugs are typically made of silicone, low-pressure foam, or highly elastic polyester. Once inserted into the ear canal, they create close contact with the external auditory canal, preventing sound from entering the middle and inner ears, thus protecting hearing.

[0003] However, traditional earplugs are relatively stiff and painful to wear. They are also difficult to adjust and prone to falling out. Furthermore, everyone's ear canal size is different, making it difficult to adjust the earplugs, which can easily lead to difficulty in securing the earplugs or causing swelling in the ears. Summary of the Invention

[0004] Based on this, it is necessary to provide an earplug to address the problems of current traditional technology. In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a noise-reducing earplug that can be worn for a long time, which is stable and comfortable, so as to solve the problems of easy falling off and poor adaptability of the earplug.

[0005] 18. The earplug of claim 17, wherein the first and second sealing members are connected in a sealed manner to each other, the second sealing member being connected in a sealed manner to each other, the second sealing member being connected in a sealed manner to each other, the first and second sealing members being connected in a sealed manner to each other, the first and second sealing members being connected in a sealed manner to each other, the first and second sealing members being connected in a sealed manner to each other, the

[0006] When the operating member is squeezed by force, the fluid is forced to pass through the outer gap channel, squeeze the first sealing ring, and then flow into the first cavity. The fluid squeezes the inner wall of the insert and expands outward.

[0007] When the fluid stops flowing into the first cavity, the first sealing member reseals and isolates the communication between the outer gap channel and the first cavity, so as to maintain a stable expanded state of the insert;

[0008] When the adjusting rod is pressed and moves relative to the movable sleeve toward the operating member, the adjusting rod drives the second sealing member to leave the inner gap channel, and the fluid flows from the first cavity through the inner gap channel into the second cavity; and

[0009] When the adjusting rod is released, the inner elastic member pushes the adjusting rod to move toward the inserting member, driving the second sealing member to reseal and isolate the communication between the inner gap channel and the second cavity.

[0010] In one embodiment, the valve assembly further includes an external elastic member sleeved on the outer wall of the movable sleeve; when the fluid stops flowing into the first cavity, the external elastic member pushes back the movable sleeve to drive the first sealing member to reseal and cut off the connection between the outer gap channel and the first cavity, so as to maintain the stable expansion shape of the insert.

[0011] In one embodiment, the inner wall of the connecting member has a first limiting portion, the outer wall of the movable sleeve has a second limiting portion, and the two ends of the external elastic member respectively abut the first limiting portion and the second limiting portion; the inner wall of the movable sleeve has a third limiting portion, the outer wall of the adjusting rod has a fourth limiting portion, and the two ends of the internal elastic member respectively abut the third limiting portion and the fourth limiting portion.

[0012] In one embodiment, the connecting member is cylindrical; the connecting member includes a first fixing portion, a second fixing portion and a flange portion located between the first fixing portion and the second fixing portion; the outer diameter of the flange portion is larger than the outer diameter of the first fixing portion and the outer diameter of the second fixing portion, so that the connection between the first fixing portion and the flange portion and the connection between the second fixing portion and the flange portion respectively form step portions; the insert is sealed and fixed on the first fixing portion, and the operating member is sealed and fixed on the second fixing portion.

[0013] In one embodiment, the outer elastic member and the inner elastic member are both compression springs; when the earplug is in a natural state, the rebound force generated by the inner elastic member is greater than the rebound force generated by the outer elastic member.

[0014] In one embodiment, a first sealing groove is provided on the inner wall of one end of the connecting member close to the insert, and the first sealing groove is used for the first sealing member to seal tightly; the first sealing groove is a frustum-shaped groove, and the outer surface of the first sealing member is a corresponding matching frustum-shaped surface.

[0015] In one embodiment, a second sealing groove is provided at the end of the movable sleeve close to the operating member, and the second sealing groove is used for the second sealing member to seal tightly; the second sealing groove is a frustum-shaped groove, and the outer surface of the second sealing member is a corresponding matching frustum-shaped surface.

[0016] In one embodiment, the length of the adjusting rod is greater than the length of the movable sleeve, so as to ensure that the adjusting rod extends into the insert after being installed in the movable sleeve.

[0017] In one embodiment, the earplug further includes an insert deformer, which is disposed in the first cavity to support the outer shape of the insert.

[0018] In one embodiment, the earplug further includes an operating deformable body, which is disposed in the second cavity to support the outer shape of the operating member.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The earplugs can be washed and reused; 2. The earplugs expand from the inside out, have strong adaptability, and can be used by different people; 3. They are firm and not easy to fall off; 4. They are easy to operate, the shape remains stable after deformation, and the sealing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional schematic diagram of the earplug according to the first embodiment of the present invention, wherein the earplug is in a natural state;

[0022] Figure 2 for Figure 1 A top view of the earplug;

[0023] Figure 3 for Figure 2 A cross-sectional view of the earplug along line AA;

[0024] Figure 4 for Figure 2 An enlarged schematic cross-sectional view of the earplug connector and valve assembly along line AA;

[0025] Figure 5 for Figure 1 A three-dimensional exploded diagram of the earplug;

[0026] Figure 6 for Figure 5 Schematic diagram of the earplug from another angle;

[0027] Figure 7 for Figure 1 Schematic diagram of the earplug after being pinched during operation;

[0028] Figure 8 Similar to the earplug of the present invention Figure 3 A cross-sectional view of the earplug with the earplug in Figure 6 Status;

[0029] Figure 9 for Figure 8 The earplug is in a state of being pinched and then restored;

[0030] Figure 10 for Figure 9 Diagram showing the earbud with the insertion part pressed and the adjustment lever pushed. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present invention, the present invention will be described more fully below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] Please refer to Figures 1 to 10 , is an earplug according to an embodiment of the present invention, which is inserted into the ear canal of the user and achieves the functions of reducing noise interference and preventing water from entering the ear through sealing. The earplug includes an insert 10, an operating member 20, a connecting member 30 connected to the insert 10 and the operating member 20 respectively, and a valve assembly 40 installed in the connecting member 30. The simple working principle is: the user inserts the insert 10 into the ear canal, presses the exposed operating member 20, and causes fluid to flow into the insert 10, causing the insert 10 to expand and block and seal the ear canal; when not needed, the earplug is removed from the ear canal, and the valve assembly 40 is pushed by the insert 10, so that the fluid flows back from the insert 10 to the operating member 20, restoring the natural state before use for the next use. It can be understood that the number of such earplugs can be two, so that the user can use it on the left and right ears.

[0034] Specifically, the insert 10 is provided with a first cavity 11; the operating member 20 is provided with a second cavity 21 (wherein the partial outline of the operating member 20 in each figure is only for the purpose of indicating its arc-shaped contour), and the second cavity 21 contains a fluid; it is understandable that in other embodiments, the first cavity 11 also contains a fluid. The connecting member 30 is provided with a hollow channel 31; the valve assembly 40 is installed in the hollow channel 31 to switch between a connected state and a closed state between the first cavity 11 and the second cavity 21. The valve assembly 40 includes a movable sleeve 51 installed in the hollow channel 31, a first sealing ring 52, an outer elastic member 53 mounted on the outer wall of the movable sleeve 51, an adjusting rod 61 passing through the movable sleeve 51, a second sealing ring 62, and an inner elastic member 63 mounted on the outer wall of the adjusting rod 61. An outer gap channel 70 is defined between the outer wall of the movable sleeve 51 and the inner wall of the connecting member 30, and the outer gap channel 70 is in communication with the second cavity 21. An inner gap channel 80 is defined between the outer wall of the adjusting rod 61 and the outer wall of the movable sleeve 51, and the inner gap channel 80 is in communication with the first cavity 11. A first sealing ring 52 is mounted on an end of the movable sleeve 51 near the inserting member 10 for switching the outer gap channel 70 in communication with the first cavity 11 or in a closed state. A second sealing ring 62 is mounted on an end of the adjusting rod 61 near the operating member 20 for switching the inner gap channel 80 in communication with the second cavity 21 or in a closed state.

[0035] In this embodiment, one end of the adjusting rod 61 close to the insert 10 extends into the first cavity 11; the inner wall of the connecting member 30 has a first limiting portion 311, the outer wall of the movable sleeve 51 has a second limiting portion 512, and the two ends of the outer elastic member 53 respectively abut the first limiting portion 311 and the second limiting portion 512; the inner wall of the movable sleeve 51 has a third limiting portion 513, the outer wall of the adjusting rod 61 has a fourth limiting portion 614, and the two ends of the inner elastic member 63 respectively abut the third limiting portion 513 and the fourth limiting portion 614.

[0036] In natural state, Figures 1 to 6 As shown, the two ends of the connecting member 30 are sealed with the insert 10 and the operating member 20 respectively, and the valve assembly 40 is located in the hollow channel 31. The hollow channel 31, the first cavity 11 and the second cavity 21 are interconnected to form a sealed chamber for fluid circulation; the outer elastic member 53 pushes the movable sleeve 51 through its own rebound force to drive the first sealing ring 52 to block the sealed outer gap channel 70, thereby cutting off the connection between the outer gap channel 70 and the first cavity 11; the inner elastic member 63 pushes the adjusting rod 61 through its own rebound force to drive the second sealing ring 62 to block the inner gap channel 80, thereby cutting off the connection between the inner gap channel 80 and the second cavity 21; at this time, the first cavity 11 and the second cavity 21 are in a disconnected state.

[0037] like Figure 7 and Figure 8As shown, when the operating member 20 is squeezed and deformed to a smaller volume by force, the fluid in the first cavity 11 squeezes the first sealing ring 52 through the outer gap channel 70 (the first cavity 11 itself is connected to the outer gap channel 70), pushing the first sealing ring 52 and the entire valve assembly 40 toward the insert 10, and the fluid flows from the outer gap channel 70 into the first cavity 11 to squeeze the inner wall of the insert 10, thereby expanding outward to block the ear canal; at this time, due to the further compression of the outer elastic member 53; after the insert 10 expands outward, when the fluid in the second cavity 21 stops flowing into the first cavity 11, that is, when the squeezing force of the fluid on the first sealing ring 52 is less than the elastic reverse thrust of the outer elastic member 53, the outer elastic member 53 pushes the movable sleeve 51 to move relative to the connecting member 30 toward the operating member 20 until the first sealing ring 52 blocks the communication between the outer gap channel 70 and the first cavity 11 again, preventing the fluid from flowing back from the first cavity 11 to the second cavity 21, completing the transition to the use state. At this time, as shown in FIG. Figure 9 As shown;

[0038] like Figure 10 As shown, when the insert 10 in the use state is pressed, the adjusting rod 61 is pushed to drive the second sealing ring 62 to move relative to the movable sleeve 51 toward the operating member 20. After the second sealing ring 62 leaves the movable sleeve 51, the inner gap channel 80 is connected with the second cavity 21, and the fluid flows from the first cavity 11 through the inner gap channel 80 into the second cavity 21. At this time, the inner elastic member 63 is further compressed; at this time, the insert 10 recovers its natural state from the expanded state, and the operating member 20 recovers its natural state from the compressed state; after the adjusting rod 61 is released and loses the thrust, the inner elastic member 63 pushes the adjusting rod 61 and the second sealing ring 62 in the opposite direction to move toward the insert 10, driving the second sealing ring 62 to reseal and cut off the communication between the inner gap channel 80 and the second cavity 21, and the earplug recovers to its initial natural state, that is, Figure 3 Status shown.

[0039] Specifically, the operating member 20 comprises a soft elastomeric shell, and the second cavity 21 is a sealed chamber for containing a fluid. This fluid can be air, water, oil, or other fluids. In various preferred embodiments, the operating member 20 is a deformable soft colloid with a certain degree of plasticity for shape recovery; more specifically, it is made of molded silicone material. Silicone materials are chemically inert, biocompatible, durable, elastic, and tough, easily molded into complex shapes through a variety of processes, easily bonded permanently with silicone adhesives, and available in a variety of formulations with a wide range of durometer hardness, elongation, and other key mechanical properties. The specific silicone formulation is selected based on the mechanical properties that are beneficial to the function of each specific component or part. It should be understood that alternative embodiments may utilize other elastomeric materials, including but not limited to polyurethane rubber, nitrile rubber, or latex rubber. In this embodiment, the operating member 20 is pot-shaped or potato-shaped and has a mounting port 22 for connection to the connector 30. The mounting port 22 communicates with the second cavity 21.

[0040] Furthermore, the earplug of this embodiment also includes an operating deformable body 25 (wherein the partial outlines of the operating deformable body 25 in each figure are only for indicating its arc-shaped outline), and the operating deformable body 25 is placed in the second cavity 21, and serves to support the external shape of the operating member 20 in its natural state. In this embodiment, the operating deformable body 25 is a foam material that allows fluid to penetrate and squeeze out. Furthermore, the operating deformable body 25 is foam cotton. After being pinched, the operating deformable body 25 can be compressed into a very small volume and inserted into the operating part 20. In its natural state, the operating deformable body 25 will elastically return to its original shape to fill and support the operating member 20. In other embodiments, the operating deformable body 25 can be omitted.

[0041] The insert 10 is a soft elastomeric shell that forms a sealed first cavity 11. In various preferred embodiments, the insert 10 is a deformable soft colloid with a certain plasticity to recover its shape; more specifically, it is made of a molded silicone material. Silicone materials are chemically inert, biocompatible, durable, elastic, tough, easily molded into complex shapes through several different processes, can be easily and permanently bonded together using silicone adhesives, and are available in various formulations with a wide range of durometer hardness, elongation, and other key mechanical properties. The specific silicone formulation is selected based on the mechanical properties that are beneficial to the function of each specific component or part. It should be understood that alternative embodiments may use other elastic materials, including but not limited to polyurethane rubber, nitrile or latex rubber. In this embodiment, the insert 10 is configured as a hollow column or a hollow handle; the insert 10 has a connection port 12 for connecting to the connector 30, and the connection port 12 is connected to the first cavity 11. The insert 10 is an expandable structure, that is, when the fluid in the first cavity 11 inside the insert 10 is sufficient to generate outward pressure, the insert 10 expands outward, so that its external geometric shape elastically increases from the original cylindrical shape to a spherical shape, filling and sealing the ear canal.

[0042] Furthermore, the earplug of this embodiment also includes an insertion deformer 15, which is positioned within the first cavity 11 and serves to support the external shape of the insert 10 in its natural state. In this embodiment, the operating deformer 25 is made of a foam material, allowing fluid to penetrate and squeeze out. Furthermore, the operating deformer 25 is a foam. The function of the insertion deformer 1 is to provide rigidity and support to the insert 10 during insertion into the ear canal. Because the insert 10 is a soft colloid, smooth insertion of the insert 10 into the ear canal by itself is difficult. It is understood that neither the insertion deformer 15 nor the operating deformer 25 is required, but rather serves a supporting purpose. In this embodiment, a first clearance space 150 is provided on the end of the insertion deformer 15 facing the valve assembly 40 to accommodate the movement of the movable sleeve 51 and the adjustment rod 61. A second clearance space 250 is provided on the end of the operating deformer 25 facing the valve assembly 40 to accommodate the movement of the adjustment rod 61. In other embodiments, the insertion deformer 15 may be omitted.

[0043] The insert 10 is expandable, that is, the insert 10 is designed to provide favorable expansion behavior. In this embodiment, the wall thickness of the insert 10 is in the range of 0.1 mm to 0.5 mm. The wall thickness of the operating portion 20 is in the range of 0.4 mm to 0.8 mm.

[0044] like Figure 5 and Figure 6As shown, the connector 30 is cylindrical. It includes a first fixing portion 33, a second fixing portion 34, and a flange portion 35 located between the first and second fixing portions 33, 34. The outer diameter of the flange portion 35 is larger than both the outer diameters of the first and second fixing portions 33, 34, resulting in stepped portions at the junctions between the first and second fixing portions 33, 34, respectively. The insert 10 is sealingly secured to the first fixing portion 33, while the operating member 20 is sealingly secured to the second fixing portion 34. Specifically, the first fixing portion 33 is sealedly embedded in the connection opening 12 of the insert 10; the second fixing portion 34 is sealedly embedded in the mounting opening 22 of the operating member 20. In this embodiment, the insert 10 abuts the flange portion 35, while the operating member 20 abuts the flange portion 35, thereby increasing the connection area. In this embodiment, the insert 10 and connector 30 are bonded and secured. The operating member 20 and connector 30 are bonded and secured. In other embodiments, the inserting member 10 and the operating member 20 may be fixedly connected to the connecting member 30 by other means, such as ultrasonic welding.

[0045] A first sealing groove 39 is provided on the inner wall of the free end of the first fixed portion 33, which is close to one end of the connector 30 and is used for the first sealing member 52 to seal tightly. The rebound force of the external elastic member 53 drives the movable sleeve 51, thereby driving the first sealing member 52 to tightly squeeze the first sealing groove 39 of the connector 30, thereby blocking the sealing gap channel 70, that is, cutting off the connection between the external gap channel 70 and the first cavity 11. In this embodiment, the first sealing groove 39 is a truncated cone-shaped groove (i.e., a trumpet-shaped groove), and the outer surface of the first sealing member 52 is a corresponding matching truncated cone-shaped surface. In other embodiments, the first sealing groove 39 can also be a step groove, and the first sealing member 52 is correspondingly set as a matching step ring to play the role of tight sealing. The inner wall of the first fixed portion 33 is provided with a first limiting portion 311. The inner wall of the connecting member 30 extending from the first stopper 311 toward the operating member 20 has an inner diameter that is larger than the inner diameter of the first stopper 311, thereby facilitating the insertion and installation of the outer elastic member 53 and allowing it to abut against the first stopper 311. In this embodiment, the connecting member 30 may be made of plastic or metal, with aluminum being one embodiment.

[0046] The movable sleeve 51 is tubular in shape. A first annular groove 517 is provided at the end of the movable sleeve 51 near the insert 10 for mounting the first sealing member 52. A second stopper 512 is provided at the end of the movable sleeve 51 near the operating member 20. The outer diameter of the second stopper 512 is larger than that of the rest of the movable sleeve 51, providing abutment for one end of the external elastic member 53. The outer wall of the movable sleeve 51 and the inner wall of the connector 30 form an outer clearance channel 70. The outer clearance channel 70 is annular in shape. The external elastic member 53 is positioned within the outer clearance channel 70, with its ends respectively abutting against the first stopper 311 and the second stopper 512. After assembly, the external elastic member 53 is compressed, meaning the distance between the first stopper 311 and the second stopper 512 is less than the natural extension of the external elastic member 53. Consequently, the assembled external elastic member 53 generates a rebound force that pushes the movable sleeve 51 toward the operating member 20 (with the connector 30 as a reference, i.e., a leveraging force). The center of the movable sleeve 51 is provided with a through-hole 518 extending through both ends for insertion of the adjustment rod 61. A third stopper 513 is provided on the inner surface of the end of the movable sleeve 51 near the operating member 20, that is, on the inner wall of the through-hole 518 near the operating member 20. The inner diameter of the third stopper 513 is smaller than the inner wall of the rest of the through-hole 518 of the movable sleeve 51, thereby providing abutment for the inner elastic member 63.

[0047] A second sealing groove 59 is provided at the end of the movable sleeve 51 close to the operating member 20, and the second sealing groove 59 is used for the second sealing member 62 to seal tightly. The rebound force of the internal elastic member 63 drives the adjusting rod 61, thereby driving the second sealing member 62 to tightly squeeze the second sealing groove 59 of the movable sleeve 51, thereby blocking the inner gap channel 80, that is, cutting off the communication between the inner gap channel 80 and the second cavity 21. In this embodiment, the second sealing groove 59 is a truncated cone-shaped groove (i.e., a trumpet-shaped groove), and the outer surface of the second sealing member 62 is a corresponding matching truncated cone-shaped surface. In other embodiments, the second sealing groove 59 can also be a step groove, and the second sealing member 62 is correspondingly set as a matching step ring to play a sealing role.

[0048] In this embodiment, the second limiting portion 512, the third limiting portion 513, and the second sealing groove 59 are all disposed at the end of the movable sleeve 51 near the operating member 20. The second limiting portion 512 is located on the outer wall of the movable sleeve 51, the third limiting portion 513 is located on the inner wall of the movable sleeve 51, and the second sealing groove 59 communicates with the through hole 518. In this embodiment, the movable sleeve 51 can be made of plastic or metal, and in one embodiment, aluminum can be used.

[0049] The adjustment rod 61 is designed as an elongated rod. Its length is greater than that of the movable sleeve 51, ensuring that the adjustment rod 61 has sufficient length to extend into the insert 10 after being installed in the movable sleeve 51. A fourth stopper 614 is located in the middle of the outer wall of the adjustment rod 61. The outer diameter of the section of the adjustment rod 61 near the operating portion 20 is smaller than that of the fourth stopper 614, allowing for the internal elastic member 53 to be fitted. A second annular groove 617 is provided at the end of the adjustment rod 61 near the operating portion 20 for receiving the second sealing member 62. The ends of the internal elastic member 63 respectively abut the third stopper 513 and the fourth stopper 614. When assembled, the internal elastic member 63 is in a compressed state, meaning that the distance between the third stopper 513 and the fourth stopper 614 is less than the natural extension length of the internal elastic member 63. Consequently, the internal elastic member 63 generates a rebound force that pushes the adjustment rod 61 toward the insert 10 (with the movable sleeve 51 as a reference, i.e., a lever for support). In this embodiment, the adjustment rod 61 can be made of plastic or metal, and in one embodiment, aluminum can be selected.

[0050] In this embodiment, both the outer elastic member 53 and the inner elastic member 63 are compression springs. The diameter of the outer elastic member 53 is larger than that of the inner elastic member 63 (due to installation requirements). Furthermore, in the assembled, naturally positioned earplug, the rebound force generated by the inner elastic member 63 is greater than that generated by the outer elastic member 53 (the specific reason for this will be explained in detail later). In this embodiment, both the first and second sealing members 52, 62 are sealing rings; specifically, both are silicone sealing rings.

[0051] When assembling, Figure 3 As shown, the adjustment rod 61 is first inserted into the inner elastic member 63. The adjustment rod 61, along with the inner elastic member 63, is then inserted into the through hole 518 from the end of the movable sleeve 51 near the insert 10 (i.e., the end where the first annular groove 517 is provided). The inner elastic member 63 abuts against the third limiting portion 513 of the movable sleeve 51. After the adjustment rod 61 passes through the other end of the movable sleeve 51, the second sealing member 62 is installed and fixed to the second annular groove 617. After the adjustment rod 61 is released, the inner elastic member 63, based on the third limiting portion 513 of the movable sleeve 51, pushes the adjustment rod 61 toward the insert 10, thereby tightly contacting the second sealing member 62 against the second sealing groove 59. At this time, the second sealing member 62 seals the end of the inner gap channel 80 near the operating portion 20.

[0052] Then the movable sleeve 51 is sleeved with the outer elastic member 53, and inserted into the hollow channel 31 from the end of the connecting member 30 close to the operating part 20, that is, the second fixed part 34, and the outer elastic member 53 respectively presses against the second limiting portion 512 of the movable sleeve 51 and the first limiting portion 311 of the inner wall of the connecting member 30; the movable sleeve 51 continues to pass through the connecting member 30 and compresses the outer elastic member 53 until the first sealing member 52 is installed and fixed on the first annular groove 517; after loosening the movable sleeve 51, the outer elastic member 53 pushes the movable sleeve 51 toward the operating member 20 based on the first limiting portion 311 of the connecting member 30, thereby pressing the first sealing member 31 against the first sealing groove 39; at this time, the first sealing member 31 seals the end of the outer gap channel 70 close to the insert 10.

[0053] At this point, the entire valve assembly 40 is assembled. Finally, the insert 10 is fitted onto the first fixing portion 33, and the operating member 20 is filled with fluid and fitted onto the second fixing portion 34. Specifically, the insert 10 and operating member 20 are glued to the connector 30 and sealed. The entire earplug assembly is now complete.

[0054] When working, combine the previous paragraphs and Figures 7 to 10 As shown, after the insert 10 is inserted into the ear canal, the operating member 20 is squeezed to expose the ear canal (pressure F1 is applied), so that the fluid in the second cavity 21 of the operating member 20 is forced to squeeze the first sealing member 52 through the outer gap channel 70, and the first sealing member 52 drives the adjustment rod 61 to move toward the insert 10 (as shown in FIG. Figure 8 The fluid flows into the first cavity 11 of the insert 10 and causes the insert 10 to expand and adhere to the inner wall of the ear canal, achieving a sealing effect. After the fluid flows into the first cavity 11 until the flow stops, the first sealing member 52 is squeezed by the fluid and weakened until it disappears. The outer elastic member 53 pushes the movable sleeve 51 back, thereby driving the first sealing member 52 to reseal and cut off the communication between the outer gap channel 70 and the first cavity 11 (as shown in FIG. Figure 9 The direction indicated by the arrow below prevents the fluid from leaking out of the first cavity 11 and causing failure, thereby maintaining the stable expansion shape of the insert 10. Figures 7 to 9 The expanded state of the insert 10 shown in the figure is a schematic diagram on the outside. To facilitate understanding, it is not a diagram of the state after being inserted into the ear canal. Because when it is inserted into the ear canal and expanded, it will be squeezed by the inner wall of the ear canal. The insert 10 will elastically fill the gap with the ear canal in the ear canal, thereby increasing the sealing and sound insulation effect.

[0055] When the user finishes using the earplug, he removes the earplug and presses the insert 10 relative to the connector 30 or the operating member 20 (applying pressure F2). The insert 10 pushes the adjustment rod 61 relative to the movable sleeve 51 toward the operating member 20 (as shown in FIG. Figure 10The adjusting rod 61 drives the second sealing member 62 to leave the inner gap channel 80, and the fluid flows into the operating member 20 through the inner gap channel 80 under the pressure of the insert 10 (relying on the pressure of its own expansion and the pressing force) until the operating member 20 returns to its original state. Then, the adjusting rod 61 is released, and the rebound force of the internal elastic member 63 pushes the adjusting rod 61 toward the insert 10, driving the second sealing member 62 to reseal the inner gap channel 80 (i.e., cut off the connection between the inner gap channel 80 and the second cavity 21), and the earplug returns to its original state (as shown in the direction of the arrow below). Figure 3 The insertion deformer 15 can help the insert 10 better maintain its shape when inserted into the ear canal or better restore it to its original shape after being pressed. Similarly, the operating deformer 25 can better assist in restoring the operating body 20 to its original shape when fluid flows into the operating body 20.

[0056] The earplugs of the present invention have the following advantages through their ingenious structural design: 1. The earplugs can be washed and reused repeatedly; 2. The earplugs expand from the inside out, have strong adaptability, and can be used by different groups of people; 3. They are firm and not easy to fall off; 4. They are easy to operate, the shape remains stable after deformation, and the sealing effect is good.

[0057] Furthermore, when restoring the earphones to their natural state after use, the user uses the insert 10 to push the adjustment rod 61, thereby pushing the second sealing ring 62 out of the inner gap channel 80 and connecting the inner gap channel 80 with the second cavity 21, rather than compressing the insert 10 to force the second sealing ring 62 open with fluid pressure. This is for a specific reason. If the second sealing ring 62 were forced open solely by compressing the insert 10 to induce fluid pressure, the insert 10 would easily be squeezed against the inner wall of the ear canal during initial use, causing backflow. This would make it difficult for the insert 10 to maintain its expanded state, and the sound-isolating and secure seal in the ear canal would not be achieved. Furthermore, in the natural state after assembly, the elastic force of the inner elastic member 63 is also greater than that of the outer elastic member 53. This is because during the aforementioned operation, when the operating member 20 is compressed, the pressure of the fluid can offset the elastic force of the outer elastic member 53, pushing open the first sealing member 52 and compressing the outer elastic member 53. To prevent the second sealing member 62 from being pushed open by the fluid when the insert 10 is compressed, the elastic force of the inner elastic member 63 must be sufficiently large to prevent the insert 10 from expanding and failing. In other words, when the earplug is in its natural state, both the inner elastic member 63 and the outer elastic member 53 are compressed, and the rebound force of the inner elastic member 63 is greater than that of the outer elastic member 53.

[0058] It can be understood that the first sealing member 52 can also be changed into a one-way valve structure (can only flow in one direction, such as a one-way air valve), that is, the fluid can flow from the outer gap channel 70 into the first cavity 11 after being squeezed, while the fluid in the first cavity 11 cannot flow from the first cavity 11 into the outer gap channel 70. At this time, the outer elastic member 53 can be omitted.

[0059] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An earplug, characterized in that:

18. The swiftly and minutely adjusting device for a wood-planer working table as claimed in claim 15, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod having a first end and a second end, and said bolt has a round shank to contact with said linking rod. said linking rod having a first end and a second end, and a bolt has a round shank to contact with said linking rod. When the operating member is squeezed by force, the fluid is forced to pass through the outer gap channel, squeeze the first sealing ring, and then flow into the first cavity. The fluid squeezes the inner wall of the insert and expands outward. When the fluid stops flowing into the first cavity, the first sealing member reseals and isolates the communication between the outer gap channel and the first cavity, so as to maintain a stable expanded state of the insert; When the adjusting rod is pressed and moves relative to the movable sleeve toward the operating member, the adjusting rod drives the second sealing member to leave the inner gap channel, and the fluid flows from the first cavity through the inner gap channel into the second cavity; and When the adjusting rod is released, the inner elastic member pushes the adjusting rod to move toward the inserting member, driving the second sealing member to reseal and isolate the communication between the inner gap channel and the second cavity.

2. The earplug according to claim 1, wherein The valve assembly also includes an external elastic member sleeved on the outer wall of the movable sleeve; when the fluid stops flowing into the first cavity, the external elastic member pushes back the movable sleeve to drive the first sealing member to reseal and cut off the connection between the outer gap channel and the first cavity, so as to maintain the stable expansion shape of the insert.

3. The earplug according to claim 2, wherein: The inner wall of the connecting member has a first limiting portion, the outer wall of the movable sleeve has a second limiting portion, and the two ends of the outer elastic member respectively abut the first limiting portion and the second limiting portion; the inner wall of the movable sleeve has a third limiting portion, the outer wall of the adjusting rod has a fourth limiting portion, and the two ends of the inner elastic member respectively abut the third limiting portion and the fourth limiting portion.

4. The earplug according to claim 2, wherein The connecting piece is cylindrical; the connecting piece includes a first fixing portion, a second fixing portion and a flange portion located between the first fixing portion and the second fixing portion; the outer diameter of the flange portion is larger than the outer diameter of the first fixing portion and the outer diameter of the second fixing portion, so that the connection between the first fixing portion and the flange portion and the connection between the second fixing portion and the flange portion respectively form step portions; the insert is sealed and fixed on the first fixing portion, and the operating piece is sealed and fixed on the second fixing portion.

5. The earplug according to claim 2, wherein: The outer elastic member and the inner elastic member are both compression springs; when the earplug is in a natural state, the rebound force generated by the inner elastic member is greater than the rebound force generated by the outer elastic member.

6. The earplug according to claim 1, wherein A first sealing groove is provided on the inner wall of one end of the connector close to the insert, and the first sealing groove is used for the first sealing member to seal tightly; the first sealing groove is a frustum-shaped groove, and the outer surface of the first sealing member is a corresponding matching frustum-shaped surface.

7. The earplug according to claim 1, wherein The movable sleeve is provided with a second sealing groove at the end close to the operating member, and the second sealing groove is used for the second sealing member to seal tightly; the second sealing groove is a frustum-shaped groove, and the outer surface of the second sealing member is a corresponding matching frustum-shaped surface.

8. The earplug according to claim 1, wherein The length of the adjusting rod is greater than the length of the movable sleeve, so as to ensure that the adjusting rod extends into the insert after being installed in the movable sleeve.

9. The earplug according to claim 1, wherein The invention also includes an insert deformer, which is placed in the first cavity and functions to support the outer shape of the insert.

10. The earplug according to claim 1, wherein It also includes an operating deformable body, which is placed in the second cavity and plays a role in supporting the outer shape of the operating member.

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