A spiral noise-canceling headphone

Abstract

This invention relates to a spiral noise-canceling earphone, comprising: an earphone head including a front cavity and a rear cavity opposite to the front cavity, wherein a sound-generating unit is disposed within the front and rear cavities; one end of the rear cavity that connects to the front cavity is designated as the front end, and the other end as the rear end; the inner wall of the rear cavity extends from the front end to the rear end, and the distance to the center of the rear cavity decreases as it approaches the rear end; a noise-canceling structure is provided on the inner wall of the rear cavity, the noise-canceling structure including a first spiral ridge, a second spiral ridge, and a spacer groove; the first spiral ridge and the second spiral ridge extend clockwise or counterclockwise from the front end of the rear cavity along its inner wall to the rear end; through the cooperation of the first spiral ridge, the second spiral ridge, and the spacer groove, combined with the conical cavity and the gradually changing width of the spiral ridge, a complex sound wave propagation path is formed; when noise passes through these spiral channels, the sound waves are subjected to multiple reflections and interferences, resulting in gradual energy attenuation, thereby achieving the effect of eliminating noise and improving sound quality.

Description

Technical Field

[0001] This invention relates to the field of headphone technology, and more particularly to a spiral noise-canceling headphone. Background Technology

[0002] Headphones are devices that connect to electronic devices via wired or wireless means for listening to music. Based on wearing style, headphones can be categorized into in-ear, over-ear, and over-ear types. Among these, in-ear and over-ear headphones generally offer better sound quality. In-ear headphones insert the sound output deeper into the user's outer ear and utilize the elastic deformation of the silicone ear tips to adapt to the different contours of each user's ear. These headphones use silicone ear tips to seal the user's outer ear, isolating external noise and thus improving sound quality.

[0003] Chinese patent CN112135217A discloses a high-frequency noise isolation structure for in-ear headphones and an in-ear headphone. The headphone includes a front shell, in which a sound-generating unit is installed. The sound-generating unit divides the front shell into a front cavity and a rear cavity. The front cavity is connected to a sound transmission hole and has a noise-absorbing structure. The noise-absorbing structure is a noise-absorbing cavity that communicates with the front cavity through a through-hole and with the outside of the front shell through an external through-hole. This reduces the noise of the headphone. However, this noise-absorbing cavity reduces noise by changing the layout of the front cavity in conjunction with the external through-hole. Its essence is still to rely on the external through-hole to reduce noise, and the structure of the front cavity has a relatively limited impact on the sound quality.

[0004] Therefore, it is necessary to develop a spiral noise-canceling headphone to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a spiral noise-canceling headphone that reduces noise and improves sound quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spiral noise-canceling earphone, comprising:

[0007] The earphone head includes a front cavity and a rear cavity opposite to the front cavity. The front cavity and the rear cavity are respectively recessed inward from opposite sides to form a front cavity and a rear cavity. A sound-emitting unit is provided in the front cavity and the rear cavity.

[0008] One end of the rear cavity that connects with the front cavity is designated as the front end, and the other end is designated as the rear end. The inner wall of the rear cavity extends from the front end to the rear end, and the distance to the center of the rear cavity decreases as it approaches the rear end.

[0009] The inner wall of the rear cavity is provided with a noise-absorbing structure, which includes a plurality of first spiral ridges and a plurality of second spiral ridges and a plurality of spacer grooves formed between the first spiral ridges and the second spiral ridges. The first spiral ridges and the second spiral ridges extend clockwise or counterclockwise from the front end of the rear cavity along its inner wall to the rear end.

[0010] Furthermore, the first and second helical ridges become closer to the center of the rear cavity as they approach the rear end.

[0011] Furthermore, both sides of the first spiral ridge are arc surfaces, one of which is a first inner arc surface and the other is a first outer arc surface. The length of the first outer arc surface is greater than the length of the first inner arc surface, and the extension path of the first spiral ridge is arc-shaped.

[0012] Furthermore, the distance between the first inner arc surface and the first outer arc surface is equal to the width of the first helical ridge. The width of the first helical ridge located at the front end of the rear cavity is greater than the width of the first helical ridge located at the rear end of the rear cavity. As it approaches the rear end, the width of the first helical ridge gradually narrows.

[0013] Furthermore, both sides of the second spiral ridge are arc surfaces, one of which is a second inner arc surface and the other is a second outer arc surface. The length of the second outer arc surface is greater than the length of the second inner arc surface, and the extension path of the second spiral ridge is arc-shaped.

[0014] Furthermore, the distance between the second inner arc surface and the second outer arc surface is equal to the width of the second helical ridge. The width of the second helical ridge located at the front end of the rear cavity is greater than the width of the second helical ridge located at the rear end of the rear cavity. As it approaches the rear end, the width of the second helical ridge gradually narrows.

[0015] Furthermore, the second spiral edge is staggered with the first spiral edge.

[0016] Furthermore, the width and height of the second spiral ridge are smaller than the width and height of the first spiral ridge.

[0017] Furthermore, the front cavity forms an annular docking protrusion, and the front end of the rear cavity is provided with an annular docking groove, with the annular docking protrusion extending into the annular docking groove for engagement.

[0018] Furthermore, the earphone head is equipped with an SR component, which is located at the rear end of the rear cavity. The SR component has a wire that passes through the rear cavity and is connected to the single unit.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is a spiral noise-canceling headphone, which has the characteristics of reducing noise and improving sound quality. By cooperating with the first spiral ridge, the second spiral ridge and the spacer groove, combined with the conical cavity and the gradually changing width of the spiral ridge, a complex sound wave propagation path is formed. When noise passes through these spiral channels, the sound waves will be reflected and interfered with multiple times, resulting in the energy gradually attenuating, thereby achieving the effect of eliminating noise and improving sound quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of a spiral noise-canceling earphone according to the present invention;

[0022] Figure 2 for Figure 1 An exploded view of the spiral noise-canceling headphones shown.

[0023] Figure 3 for Figure 1 The diagram shows the front cavity structure of the spiral noise-canceling headphones.

[0024] Figure 4 for Figure 1 The diagram shows the rear cavity structure of the spiral noise-canceling headphones.

[0025] Figure 5 for Figure 4 The image shows a plan view of a spiral noise-canceling headphone. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of the spiral noise-canceling headphones proposed according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] The specific solution of the spiral noise-canceling headphones provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Please refer to Figures 1 to 5 The present invention is a spiral noise-canceling earphone, which includes an earphone head 1 and an SR component 2 that is connected to the earphone head 1.

[0030] Please refer to Figures 1 to 2 The headphone head 1 includes a front cavity 11, a rear cavity 12 connected to the front cavity 11, and a sound-emitting unit 13 disposed in the front cavity 11 and the rear cavity 12.

[0031] Please refer to Figures 1 to 3 The front cavity 11 is recessed inward from the side opposite to the rear cavity 12 to form the front cavity 111, and the rear cavity 12 is recessed inward from the side opposite to the front cavity 11 to form the rear cavity 121. When the front cavity 11 and the rear cavity 12 are connected, the front cavity 111 and the rear cavity 121 constitute a sealed cavity, and the sound-emitting unit 13 is housed in the sealed cavity.

[0032] Please refer to Figure 3 The front cavity 11 has an in-ear end that preferentially enters the human ear canal, and a docking end that connects to the rear cavity 12. The in-ear end is oval-shaped and conforms to the human ear canal. The front cavity 11 extends outward from the surface of the in-ear end to form a sound outlet channel 112, which is connected to the sound outlet channel 112. The end of the sound outlet channel 112 is provided with a mounting groove 113, and the earphone head 1 is provided with an earphone cover 14, which is fitted onto the end of the sound outlet channel 112 through the mounting groove 113. The docking end of the front cavity 11 forms an annular docking protrusion 114, which extends from the edge surface of the docking end of the front cavity 11 towards the rear cavity 12 and surrounds the front cavity 111. Specifically, the annular docking protrusion 114 has a notch 115, which is recessed inward from the surface of the annular docking protrusion 114 to facilitate docking with the rear cavity 12.

[0033] Please refer to Figure 4 and Figure 5 The rear cavity 12 has a front end that connects with the front cavity 11, and a rear end that connects with the SR component 2. The front end of the rear cavity 12 has an annular docking groove 122, which is formed by an inward indentation from the front end surface of the rear cavity 12, surrounding the rear cavity 121. Specifically, the inner wall of the annular docking groove 122 has a wedge-shaped protrusion 123, which extends radially from the inner wall of the annular docking groove 122. The diameter of the annular docking groove 122 is larger than the diameter of the annular docking protrusion 114. When the rear cavity 12 connects with the front cavity 11, the annular docking protrusion 114 extends into the annular docking groove 122, and the wedge-shaped protrusion 123 engages with the notch 115.

[0034] The rear end of the rear cavity 12 is provided with a connecting through hole 124, and the SR component 2 is provided with a wire 21, which is connected to the sound-generating unit 13 through the connecting through hole 124.

[0035] Furthermore, the rear cavity 121 is a conical cavity, with the diameter of its front end being larger than that of its rear end. The inner wall of the rear cavity 12 extends from the front end to the rear end, and the distance from the axis decreases as it approaches the rear end. A sound-absorbing structure 125 is provided on the inner wall of the rear cavity 12, and the sound-absorbing structure 125 extends along its inner wall.

[0036] Please refer to Figure 4 The noise-absorbing structure 125 is integrally formed with the rear cavity 12, and includes a plurality of first spiral ridges 1251 and a plurality of second spiral ridges 1252 and a plurality of spacer grooves 1253 formed between the first spiral ridges 1251 and the second spiral ridges 1252.

[0037] One end of the first helical ridge 1251 is located at the front end of the rear cavity 121, and extends spirally along the inner wall of the rear cavity 121 to the rear end of the rear cavity 121. That is, the distance between the first helical ridge 1251 and the axis decreases as it approaches the rear end. Specifically, the two ends of the first helical ridge 1251 are not on the same horizontal line. One end of the first helical ridge 1251 is located at the front end of the rear cavity 121, and the other end extends obliquely along the inner wall of the rear cavity 121 to the rear end of the rear cavity 121, forming a helical shape. More specifically, both sides of the first helical ridge 1251 are arc surfaces, one of which is the first inner arc surface 1254, and the other is the first outer arc surface 1255. The length of the first outer arc surface 1255 is greater than the length of the first inner arc surface 1254, that is, the extension path of the first helical ridge 1251 is arc-shaped. Preferably, the distance between the first inner arc surface 1254 and the first outer arc surface 1255 is the width of the first spiral ridge 1251. The width of the first spiral ridge 1251 located at the front end of the rear cavity 121 is greater than the width of the first spiral ridge 1251 located at the rear end of the rear cavity 121. As it approaches the rear end, the width of the first spiral ridge 1251 gradually narrows.

[0038] Similarly, the second helical ridge 1252 is staggered with the first helical ridge 1251. One end of the second helical ridge 1252 is located at the front end of the rear cavity 121 and extends spirally along the inner wall of the rear cavity 12 to the rear end of the rear cavity 121. That is, the distance between the second helical ridge 1252 and the axis decreases as it approaches the rear end. Specifically, the two ends of the second helical ridge 1252 are not on the same horizontal line. One end of the second helical ridge 1252 is located at the front end of the rear cavity 121, and the other end extends obliquely along the inner wall of the rear cavity 12 to the rear end of the rear cavity 121, forming a helical shape. More specifically, both sides of the second helical ridge 1252 are arc surfaces. One side is the second inner arc surface 1256, and the other side is the second outer arc surface 1257. The length of the second outer arc surface 1257 is greater than the length of the second inner arc surface 1256, that is, the extension path of the second helical ridge 1252 is arc-shaped. Preferably, the distance between the second inner arc surface 1256 and the second outer arc surface 1257 is the width of the second spiral ridge 1252. The width of the second spiral ridge 1252 located at the front end of the rear cavity 121 is greater than the width of the second spiral ridge 1252 located at the rear end of the rear cavity 121. As it approaches the rear end, the width of the second spiral ridge 1252 gradually narrows.

[0039] In this embodiment, the width of the second helical ridge 1252 is smaller than the width of the first helical ridge 1251. The distance of the second helical ridge 1252 from the axis is smaller than the distance of the first helical ridge 1251 from the axis.

[0040] SR component 2 is prior art and will not be explained in detail. SR component 2 is installed at the rear end of the rear cavity 12.

[0041] When the spiral noise-canceling headphones of the present invention are used, the wire 21 in the SR component 2 transmits the audio signal to the sound-generating unit 13. The sound-generating unit 13 converts the electrical signal into a sound wave signal. The sound wave propagates in the sealed cavity, is conducted through the front cavity 111 to the sound outlet channel 112, and finally passes through the sound outlet channel 112 and exits from the earphone cover 14 into the human ear canal, so that the user can hear the sound.

[0042] In this invention, a spiral noise-canceling headphone eliminates noise by having the noise generated by the sound-generating unit 13 enter the rear cavity 121. The inner wall of the rear cavity 121 is equipped with a noise-canceling structure 125, which consists of a first spiral ridge 1251, a second spiral ridge 1252, and a spacer groove 1253. When noise enters the rear cavity 121, it propagates within the spiral noise-canceling structure 125. As the noise propagates along the spacer groove 1253 between the first and second spiral ridges 1251 and 1252, air moves with the sound wave, consuming energy and attenuating the sound signal. Because the rear cavity 121 is a conical cavity, and the width of the spiral ridges gradually narrows from the front to the rear, this structural design further enhances the noise attenuation effect, especially for low-frequency noise. Ultimately, the attenuated noise reduces interference with the sound heard by the user, achieving the noise cancellation function.

[0043] This invention relates to a spiral noise-canceling headphone, which features noise reduction and sound quality improvement. By combining the first spiral ridge, the second spiral ridge, and the spacer groove, along with the conical cavity and the gradually changing width of the spiral ridge, a complex sound wave propagation path is formed. When noise passes through these spiral channels, the sound waves are subjected to multiple reflections and interferences, causing the energy to gradually attenuate, thereby achieving the effect of eliminating noise and improving sound quality.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spiral sound attenuating earphone, characterized in that, The earphone head (1) comprises a front cavity (11) and a rear cavity (12) opposite to the front cavity (11), the front cavity (11) and the rear cavity (12) are respectively inwardly recessed from opposite sides to form a front cavity (111) and a rear cavity (121), and a sound emitting unit (13) is arranged in the front cavity (111) and the rear cavity (121). The rear cavity (12) is provided with a front end and a rear end opposite to the front end, an inner wall of the rear cavity (12) extends from the front end to the rear end, and the closer to the rear end, the closer to the center of the rear cavity (12). The inner wall of the rear cavity (12) is provided with a sound attenuation structure (125), the sound attenuation structure (125) comprises a plurality of first spiral ribs (1251), a plurality of second spiral ribs (1252) and a plurality of interval grooves (1253) formed between the first spiral ribs (1251) and the second spiral ribs (1252), the first spiral ribs (1251) and the second spiral ribs (1252) extend clockwise or counterclockwise along the inner wall of the rear cavity (12) from the front end to the rear end, and the closer to the rear end, the closer to the center of the rear cavity (12). Both sides of the first spiral rib (1251) are arc surfaces, one side is a first inner arc surface (1254), and the other side is a first outer arc surface (1255), the length of the first outer arc surface (1255) is greater than the length of the first inner arc surface (1254), the extension path of the first spiral rib (1251) is arc-shaped, the interval between the first inner arc surface (1254) and the first outer arc surface (1255) is the width of the first spiral rib (1251), the width of the first spiral rib (1251) at the front end of the rear cavity (121) is greater than the width of the first spiral rib (1251) at the rear end of the rear cavity (121), and the width of the first spiral rib (1251) gradually narrows as the rear end is approached. Both sides of the second spiral rib (1252) are arc surfaces, one side is a second inner arc surface (1256), and the other side is a second outer arc surface (1257), the length of the second outer arc surface (1257) is greater than the length of the second inner arc surface (1256), and the extension path of the second spiral rib (1252) is arc-shaped.

2. The spiral sound attenuating earphone of claim 1, wherein, The interval between the second inner arc surface (1256) and the second outer arc surface (1257) is the width of the second spiral rib (1252), the width of the second spiral rib (1252) at the front end of the rear cavity (121) is greater than the width of the second spiral rib (1252) at the rear end of the rear cavity (121), and the width of the second spiral rib (1252) gradually narrows as the rear end is approached.

3. The spiral sound attenuating earphone of claim 2, wherein, The second spiral rib (1252) and the first spiral rib (1251) are staggered.

4. The spiral sound attenuating earphone of claim 1, wherein, The width and height of the second spiral rib (1252) are less than the width and height of the first spiral rib (1251).

5. The spiral sound attenuating earphone of claim 1, wherein, ​ 6. The spiral sound attenuating earphone of claim 1, wherein, The front cavity (11) forms a ring-shaped butt protrusion (114), and the front end of the rear cavity (12) is provided with a ring-shaped butt recess (122), and the ring-shaped butt protrusion (114) extends into the ring-shaped butt recess (122) to be matched.

7. The spiral sound attenuating earphone of claim 1, wherein The earphone head (1) is provided with an SR piece (2), the SR piece (2) is located at the rear end of the rear cavity (12), and the SR piece (2) has a wire (21), the wire (21) passes through the rear cavity (12) and is connected with the single body (13).

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