Low frequency enhancement structure for open earphones

Abstract

This invention discloses a bass enhancement structure for open-back headphones, characterized by comprising a bass tube structure and a speaker. Both ends of the bass tube structure have openings; the bottom opening of the bass tube structure communicates with the speaker, and the top opening of the bass tube structure communicates with the headphone cavity. The bass tube structure contains at least one curved channel connecting the bottom opening and the top opening. This invention designs a layered labyrinthine bass tube within the small space of the headphone, directly coupling it to the rear cavity of the speaker to achieve bass enhancement and obtain a more ideal sound quality performance.

Description

Technical Field

[0001] This invention relates to open-back headphones, and more particularly to a bass enhancement structure for open-back headphones. Background Technology

[0002] Open-back headphones are a new niche category in the Bluetooth audio market. They don't need to be inserted into the ear, freeing up the ear canal and improving comfort for extended listening sessions. Open-back listening also allows users to be aware of ambient sounds, enhancing safety. However, due to the limited size of the headphones themselves, the open-back design results in significant loss of low-frequency frequencies, making it difficult to achieve ideal sound quality.

[0003] Many open-back headphones on the market have poor bass. To improve the low-frequency sound quality, the usual practice is to add a bass tube inside the sound chamber for bass enhancement. For general designs where the battery and speaker sound chamber are separate (non-TWS neckband headphones, separate TWS designs, etc.), the placement of the bass tube usually does not pose a significant challenge to the structural space.

[0004] However, for designing a lightweight and compact open-back headphone, traditional bass tube designs are not feasible because the battery, speaker, motherboard, and all other components are concentrated in a small cavity, leaving extremely limited space. The industry urgently needs to solve these problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a bass enhancement structure for open-back headphones, which designs a layered labyrinthine bass tube in the small space of the headphones and couples it directly with the rear cavity of the speaker to achieve the function of bass enhancement and obtain a more ideal sound quality performance.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A bass enhancement structure for open-back headphones includes a bass tube structure and a speaker. Both ends of the bass tube structure have openings. The bottom opening of the bass tube structure is connected to the speaker, and the top opening of the bass tube structure is connected to the cavity of the headphones. The bass tube structure has at least one curved channel that connects the bottom opening and the top opening.

[0008] Specifically, the bass tube structure includes a tube body and a cover. The tube body is cylindrical, with a partition in the middle. The top wall of the partition has a curved guide plate. The bottom wall of the cover is attached to the top edge of the curved guide plate. The curved guide plate, the top wall of the partition, and the bottom wall of the cover together form the curved channel.

[0009] Specifically, the starting end of the bending guide plate starts from the inner wall of the tube body and rotates inward, so that the bending guide plate, the inner wall of the tube body, and the two adjacent bending guide plates form the bending channel.

[0010] Specifically, the starting section of the curved guide plate is bent outward, the bottom wall of the partition at the starting section of the curved guide plate is provided with a first communication port, the ending section of the curved guide plate is bent to form a semi-closed surrounding section, and the cover is provided with a second communication port, which is located at the semi-closed surrounding section.

[0011] Specifically, the curved channel is arc-shaped and spirals inward.

[0012] Specifically, the bass enhancement structure of the open-back headphones includes a headphone shell, the inside of which is provided with a speaker mounting cavity, the lower end opening edge contour of the tube body is adapted to the top side opening edge of the speaker mounting cavity, and the speaker is disposed in the speaker mounting cavity.

[0013] Specifically, the bending guide plate includes an outer ring segment, a transition segment, and an inner ring segment, and the end of the outer ring segment is connected to the beginning of the outer ring segment through the transition segment.

[0014] Specifically, the main body of the pipe is cylindrical, the outer ring section and the inner ring section are both arc-shaped and both are superior arcs, the outer ring section and the inner ring section are coaxially arranged, and the transition section is arranged along the diameter direction of the main body of the pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The bass tube structure includes a tube body and a cover. The tube body is cylindrical, with a partition in the middle. A curved guide plate is located on the top wall of the partition. The bottom wall of the cover abuts against the top edge of the curved guide plate. The curved guide plate, the top wall of the partition, and the bottom wall of the cover together form a curved channel. This curved channel is arc-shaped and spirals inward, forming a labyrinth. One end of this curved channel connects to the speaker through a first connecting port, and the other end connects to the headphone jack through a second connecting port.

[0017] Because the curved channel spirals inward, forming a maze shape, it has enough length to enhance low frequencies without taking up too much space inside the headphone shell. This allows for enough space inside the headphone shell to accommodate other components, making the headphones lightweight and aesthetically pleasing overall.

[0018] It is also directly coupled to the rear cavity of the speaker, forming a stable acoustic cavity structure, which ensures product consistency. It makes full use of the rear cavity space at the back of the speaker to design cavity structures with different performance characteristics. Attached Figure Description

[0019] Figure 1 A stereoscopic view of an open-back headphone;

[0020] Figure 2 This is an internal structural view of the bass enhancement structure of the open-back headphone of the present invention;

[0021] Figure 3 This is an exploded view of the bass enhancement structure of the open-back headphone of the present invention;

[0022] Figure 4 This is an exploded view of the bass enhancement structure of the open-back headphone of the present invention;

[0023] Figure 5 This is a cross-sectional view of the bass enhancement structure of the open-back headphone of the present invention;

[0024] Figure 6 This is a partial view of the bass enhancement structure of the open-back headphone of the present invention;

[0025] Figure 7 This is a partial exploded view of the bass enhancement structure of the open-back headphone of the present invention.

[0026] In the picture:

[0027] 1. Bass tube structure; 13. Main body; 131. Partition plate; 132. Curved guide plate; 1321. Outer ring section; 1322. Transition section; 1323. Inner ring section; 133. First connecting port; 14. Cover; 141. Second connecting port;

[0028] 2. Speaker;

[0029] 4. Earphone shell; 41. Speaker mounting cavity. Detailed Implementation

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] See Figures 1 to 7 A bass enhancement structure for open-back headphones includes a bass tube structure 1 and a speaker 2. Both ends of the bass tube structure 1 have openings. The bottom opening of the bass tube structure 1 communicates with the speaker 2, and the top opening of the bass tube structure 1 communicates with the headphone cavity. The bass tube structure 1 contains at least one curved channel (e.g., Figure 5 , Figure 7 At point A in the middle, the curved channel connects the bottom opening with the top opening.

[0032] Specifically, the bass tube structure 1 includes a tube body 13 and a cover 14. The tube body 13 is cylindrical, and a partition 131 is provided in the middle of the tube body 13. A curved guide plate 132 is provided on the top wall of the partition 131. The bottom wall of the cover 14 abuts against the top edge of the curved guide plate 132. The curved guide plate 132, the top wall of the partition 131, and the bottom wall of the cover 14 together form a curved channel (e.g., Figure 5 , Figure 7 (Point A in the middle).

[0033] Specifically, the starting end of the bending guide plate 132 rotates inward from the inner wall of the tube body 13, so that the bending guide plate 132, the inner wall of the tube body 13, and two adjacent bending guide plates 132 form a bending channel (e.g., Figure 5 , Figure 7 (Point A in the middle).

[0034] Specifically, the starting section of the curved guide plate 132 is bent outwards, and the bottom wall of the partition 131 at the starting section of the curved guide plate 132 is provided with a first connecting port 133. The ending section of the curved guide plate 132 is bent to form a semi-enclosed surrounding section. The cover 14 is provided with a second connecting port 141. The second connecting port 141 is located at the semi-enclosed surrounding section.

[0035] Specifically, curved channels (such as...) Figure 5 , Figure 7 (At point A) it spirals inward in an arc shape.

[0036] Specifically, the bass enhancement structure of the open-back headphones includes an earphone housing 4, inside which a speaker mounting cavity 41 is provided. The lower opening edge contour of the tube body 13 is adapted to the top opening edge of the speaker mounting cavity 41. The speaker 2 is disposed within the speaker mounting cavity 41.

[0037] Specifically, the bending guide plate 132 includes an outer ring segment 1321, a transition segment 1322, and an inner ring segment 1323. The end of the outer ring segment 1321 is connected to the beginning of the outer ring segment 1321 through the transition segment 1322.

[0038] Specifically, the main body 13 is cylindrical, the outer ring section 1321 and the inner ring section 1323 are both arc-shaped and are both superior arcs. The outer ring section 1321 and the inner ring section 1323 are coaxially arranged, and the transition section 1322 is arranged along the diameter direction of the main body 13.

[0039] The technical features of the bass enhancement structure of the open-back headphones of the present invention are as follows:

[0040] The bass tube structure 1 includes a tube body 13 and a cover 14. The tube body 13 is cylindrical, and a partition 131 is provided in the middle of the tube body 13. A curved guide plate 132 is provided on the top wall of the partition 131. The bottom wall of the cover 14 abuts against the top edge of the curved guide plate 132. The curved guide plate 132, the top wall of the partition 131, and the bottom wall of the cover 14 together form a curved channel (e.g., Figure 5 , Figure 7 At point A in the middle, the curved channel is arc-shaped and spirals inward, forming a maze. One end of the curved channel is connected to the speaker 2 through the first connecting port 133, and the other end is connected to the headphone sound hole through the second connecting port 141.

[0041] Because the curved channel spirals inward, forming a maze shape, it has enough length to enhance low frequencies without taking up too much space inside the headphone shell. This allows for enough space inside the headphone shell to accommodate other components, making the headphones lightweight and aesthetically pleasing overall.

[0042] It is also directly coupled to the rear cavity of the speaker, forming a stable acoustic cavity structure, which ensures product consistency. It makes full use of the rear cavity space at the back of the speaker to design cavity structures with different performance characteristics.

[0043] It should be noted that the aforementioned curved channel can be one or more layers.

[0044] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A bass enhancement structure for open-back headphones, characterized in that: The device includes a bass tube structure and a speaker. Both ends of the bass tube structure are provided with openings. The bottom opening of the bass tube structure is connected to the speaker, and the top opening of the bass tube structure is connected to the cavity of the earphone. The bass tube structure has at least one curved channel that connects the bottom opening and the top opening. The bass tube structure includes a tube body and a cover. The tube body is cylindrical, and a partition is provided in the middle of the tube body. A curved guide plate is provided on the top wall of the partition. The bottom wall of the cover is attached to the top edge of the curved guide plate. The curved guide plate, the top wall of the partition, and the bottom wall of the cover together form the curved channel. The starting end of the bending guide plate starts from the inner wall of the tube body and rotates inward, so that the bending guide plate, the inner wall of the tube body, and two adjacent bending guide plate segments form the bending channel; the starting segment of the bending guide plate bends outward, the bottom wall of the partition at the starting segment of the bending guide plate is provided with a first communication port, the end segment of the bending guide plate bends to form a semi-closed ring segment, and the cover is provided with a second communication port, which is located at the semi-closed ring segment.

2. The bass enhancement structure of the open-back headphones according to claim 1, characterized in that: The curved channel is arc-shaped and spirals inward.

3. The bass enhancement structure of the open-back headphones according to claim 1, characterized in that: The bass enhancement structure of the open-back headphones includes a headphone shell, inside which a speaker mounting cavity is provided. The lower end opening edge contour of the tube body is adapted to the top side opening edge of the speaker mounting cavity, and the speaker is disposed in the speaker mounting cavity.

4. The bass enhancement structure of the open-back headphones according to claim 2, characterized in that: The bending guide plate includes an outer ring segment, a transition segment, and an inner ring segment. The end of the outer ring segment is connected to the beginning of the outer ring segment through the transition segment.

5. The bass enhancement structure of the open-back headphones according to claim 4, characterized in that: The main body of the pipe is cylindrical, and both the outer ring section and the inner ring section are arc-shaped and are both superior arcs. The outer ring section and the inner ring section are coaxially arranged, and the transition section is arranged along the diameter direction of the main body of the pipe.

Images