Sliding arm structure and headphones

Abstract

This utility model belongs to the technical field of headphones, specifically relating to a sliding arm structure and headphones. The sliding arm structure includes a main body, which is cylindrical, and has a coaxially nested cavity inside. The main body has a first end and a second end. The first end has a first through hole communicating with the cavity. The second end has a connecting part with a second through hole penetrating through the connecting part along its thickness direction. By making the main body cylindrical, the stress can be evenly distributed along the circumference when subjected to radial force, avoiding local stress concentration, effectively improving the load-bearing capacity and fatigue resistance of the sliding arm structure, and extending its service life. The cylindrical main body also effectively enhances the structural stability of the sliding arm structure, making it less prone to deformation when subjected to external pressure or bending.

Description

Technical Field

[0001] This utility model belongs to the technical field of headphones, specifically relating to a sliding arm structure and headphones. Background Technology

[0002] Over-ear headphones are a common audio playback device widely used in people's daily lives, work, and studies. To accommodate the differences in head size among users and ensure that the headphones can be worn comfortably and securely, over-ear headphones typically have extendable sliding arms on both sides of the two earpieces, with the headband inserted into the sliding arms. The length of the headband can be adjusted by extending or retracting the sliding arms, thus adapting to different head sizes.

[0003] In existing headphone sliding arm structures, the common sliding arm shapes are mostly flat or have specific regular shapes. While these traditional sliding arm shapes can achieve headband length adjustment to some extent, they also have many shortcomings.

[0004] In terms of structural strength, traditionally shaped sliding arms, such as flat ones, exhibit relatively poor structural stability when subjected to external pressure or bending. For example, if a user accidentally squeezes the headphones or places them in an irregularly shaped space, the sliding arm is prone to deformation, affecting the normal use and wearing comfort of the headphones. Moreover, a deformed sliding arm may prevent the headband from extending or retracting properly, or even damage related connecting components inside the headphones. Utility Model Content

[0005] The purpose of this utility model is to provide a sliding arm structure to address the shortcomings of the existing technology, thereby solving the technical problems of insufficient strength, poor structural stability, and easy deformation of the flat sliding arm structure in the existing technology when subjected to external pressure or bending.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a sliding arm structure, including a main body, the main body being cylindrical, and having a coaxially nested cavity inside the main body. The main body has a first end and a second end, the first end having a first through hole communicating with the cavity, and the second end having a connecting part having a second through hole penetrating the connecting part along its thickness direction.

[0008] In some embodiments, the main body includes a first sidewall and a second sidewall, the first sidewall and the second sidewall surrounding the main body, wherein, along the cavity toward the first sidewall, the first sidewall bends to form a first arcuate wall, and the second sidewall bends to form a second arcuate wall.

[0009] In some embodiments, the curvature of both the first arcuate wall and the second arcuate wall gradually decreases from the first end to the second end.

[0010] In some embodiments, the first sidewall is provided with a recessed structure, which is formed by recessing from the outer surface of the main body towards the cavity. The recessed structure is provided with a notch that communicates with the cavity. The shape of the notch corresponds to the shape of the recessed structure. The recessed depth H of the recessed structure and the radius R of the first sidewall satisfy the relationship: H≤R.

[0011] In some embodiments, the inner surface of the second sidewall is provided with a plurality of positioning posts, which are arranged around the perimeter and correspond to the edge of the notch. Each positioning post is provided with a positioning groove.

[0012] In some embodiments, the second sidewall is provided with a third through hole, the third through hole corresponds to the position of the notch and communicates with the cavity, the outer surface of the second sidewall is provided with an annular protrusion, the annular protrusion is coaxially arranged with the third through hole, and the outer side of the annular protrusion is provided with an annular recess.

[0013] In some embodiments, the first through hole includes a first segment, a second segment, and a third segment, the second segment connecting the first segment and the third segment, and the first segment communicating with the cavity. The diameter F of the first segment, the diameter G of the second segment, the diameter T of the third segment, and the diameter L of the cavity satisfy the following relationships: G≥H, G>F≥L.

[0014] In some embodiments, the third hole segment includes a straight hole segment and a variable diameter segment. The variable diameter segment is connected to the second hole segment through the straight hole segment. Along the direction from the straight hole segment to the variable diameter segment, the diameter of the variable diameter segment gradually increases. The maximum diameter P of the variable diameter segment and the diameter G of the second hole segment satisfy the relationship: G = P.

[0015] In some embodiments, when F > L, a step is formed at the connection between the first hole segment and the cavity, a limiting block is provided on the step, the limiting block is connected to the inner wall of the first hole segment, and the width of the limiting block is smaller than the width of the step.

[0016] Secondly, this utility model provides a headset, a headband, a sound-generating unit, and a sliding arm structure as described in the above embodiment. The sound-generating unit is connected to the end wall of the headband through the sliding arm structure. The headband is at least partially inserted into the cavity and is slidably connected to the cavity.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0018] This utility model's sliding arm structure, by making the main body cylindrical, allows for uniform stress distribution along the circumference when subjected to radial force, avoiding localized stress concentration and effectively improving the load-bearing capacity and fatigue resistance of the sliding arm structure, thus extending its service life. The cylindrical main body also effectively enhances the structural stability of the sliding arm structure, making it less prone to deformation under external pressure or bending. The end of the headband slidably connects to the cavity of the main body through the first through-hole, effectively allowing for size adjustment of the headphones to fit different head shapes. A connecting part is provided at the second end of the main body, which is rotatably connected to the sound unit through the second through-hole, effectively allowing for adjustment of the headphone's sound unit and ensuring the headphones better fit the user's head shape, improving wearing comfort.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the structural schematic diagrams of the sliding arm structure of this utility model.

[0022] Figure 2 This is the second schematic diagram of the sliding arm structure of this utility model.

[0023] Figure 3 This is one of the cross-sectional views of the sliding arm structure of this utility model.

[0024] Figure 4 This is a partially enlarged view of the sliding arm structure of this utility model.

[0025] Figure 5 This is the second cross-sectional view of the sliding arm structure of this utility model.

[0026] The reference numerals in the attached figures are explained as follows:

[0027] 100. Sliding arm structure;

[0028] 10. Main body; 11. Cavity; 12. First end; 121. First through hole; 122. First hole section; 123. Second hole section; 124. Third hole section; 125. Straight hole section; 126. Variable diameter section; 13. Second end; 14. First sidewall; 141. Recessed structure; 142. Notch; 15. Second sidewall; 151. Positioning post; 152. Positioning groove; 153. Third through hole;

[0029] 20. Connecting part; 21. Second through hole;

[0030] 30. Annular protrusion; 31. Annular depression;

[0031] 40. Step; 41. Limiting block. Detailed Implementation

[0032] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The following will be combined with the appendix Figures 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0036] The present invention relates to a headset, a headband, a sound-generating unit, and a sliding arm structure 100 as described in the above embodiment. The sound-generating unit is connected to the end wall of the headband via the sliding arm structure 100. The headband is at least partially inserted into the cavity 11 and is slidably connected to the cavity 11.

[0037] Please see Figures 1-5 The sliding arm structure 100 of this utility model embodiment includes a main body 10, which is cylindrical. A coaxially nested cavity 11 is provided inside the main body 10. The main body 10 has a first end 12 and a second end 13. The first end 12 is provided with a first through hole 121, which communicates with the cavity 11. The second end 13 is provided with a connecting part 20, and a second through hole 21 is provided on the connecting part 20. The second through hole 21 penetrates the connecting part 20 along the thickness direction a.

[0038] Compared with the prior art, the sliding arm structure 100 of this utility model embodiment, by making the main body 10 cylindrical, allows the stress of the cylindrical main body 10 to be evenly distributed along the circumference when subjected to radial force, avoiding local stress concentration, effectively improving the load-bearing capacity and fatigue resistance of the sliding arm structure 100, and extending its service life. The cylindrical main body 10 effectively enhances the structural stability of the sliding arm structure 100, making it less prone to deformation when subjected to external pressure or bending. The end of the headband is slidably connected to the cavity 11 of the main body 10 through the first through hole 121, effectively allowing adjustment of the size of the headphones to fit different head shapes. The second end 13 of the main body 10 is provided with a connecting part 20, which is rotatably connected to the sound unit through the second through hole 21, effectively allowing adjustment of the sound unit of the headphones, effectively making the headphones better fit the user's head shape and improving the comfort of wearing the headphones.

[0039] It should be noted that when the connecting part 20 is rotatably connected to the sound unit, the rotating shaft of the sound unit is inserted into the second through hole 21 of the connecting part 20, and the rotating shaft of the sound unit is rotatably connected to the second through hole, which effectively realizes the adjustment of the sound unit of the headphones.

[0040] In some embodiments, the main body 10 includes a first sidewall 14 and a second sidewall 15, which surround and form the main body 10. The first sidewall 14 bends to form a first arcuate wall along the direction from the cavity 11 towards the first sidewall 14, and the second sidewall 15 bends to form a second arcuate wall. The combined use of the first and second arcuate walls allows the arcuate structure to more effectively disperse stress when the main body 10 is subjected to bending forces. When the sliding arm structure 100 bends under external force, the arcuate wall can evenly distribute stress along its curvature, avoiding excessive stress concentration in a localized area, thereby greatly enhancing the bending resistance of the main body 10 and improving the overall stability of the sliding arm structure 100. Simultaneously, during the use of the headphones, the sliding arm structure 100 is in direct contact with the human body. The design of the first and second arcuate walls makes the surface of the sliding arm structure 100 more rounded and smooth, resulting in a closer fit to the human head, reducing the pressure of sharp edges and corners, and improving wearing comfort.

[0041] In some embodiments, the curvature of both the first and second arcuate walls gradually decreases from the first end 12 to the second end 13. By setting the curvature of the first and second arcuate walls so that both gradually decrease from the first end 12 to the second end 13, the first end 12 typically needs to be connected to other components. A larger curvature can increase the contact area and friction of the connection portion 20, improving the strength and stability of the connection. For example, when cooperating with headband components and other connectors, a larger curvature can better conform to the shape of the connectors, reduce connection gaps, and ensure the reliability of the connection. The gradual decrease in curvature from the first end 12 to the second end 13 allows the sliding arm structure 100 to more flexibly adjust its angle and position when connected to other components such as the sound unit, adapting to different connection methods and installation requirements, thus improving the adaptability and versatility of the headphones. Simultaneously, during the use of the headphones, the sliding arm structure 100 is in direct contact with the human body. The larger curvature of the first end 12 allows it to better conform to the curve of the human head, reducing pressure on the head. As it extends towards the second end 13, the curvature gradually decreases, making the contact between the sliding arm structure 100 and the human head smoother and more natural, avoiding any foreign body sensation or discomfort caused by abrupt changes in curvature. This improves wearing comfort.

[0042] In some embodiments, the first sidewall 14 is provided with a recessed structure 141, which is recessed from the outer surface of the main body 10 toward the cavity 11. The recessed structure 141 is provided with a notch 142, which communicates with the cavity 11. The shape of the notch 142 corresponds to the shape of the recessed structure 141. The recess depth H of the recessed structure 141 and the radius R of the first sidewall 14 satisfy the relationship: H≤R. By providing the recessed structure 141 and the notch 142, with the notch 142 located on the recessed structure 141 and communicating with the cavity 11, it is effectively possible to assemble components into the cavity 11 or repair components within the cavity 11 through the notch 142 during assembly or repair, effectively reducing the difficulty of assembly or repair. Meanwhile, the recessed structure 141 is recessed from the outer surface of the main body 10 toward the cavity 11, which effectively enhances the structural strength of the first sidewall 14, so that the first sidewall 14 can better resist deformation when subjected to force, thereby improving the overall stability of the sliding arm structure 100.

[0043] Furthermore, by setting the recess depth H of the recessed structure 141 and the radius R of the first sidewall 14, if the recess depth H of the recessed structure 141 is greater than the radius R of the first sidewall 14 (i.e., H > R), the recess depth of the recessed structure 141 is too large, causing the space of the cavity 11 to be compressed, increasing the difficulty of layout planning for the components placed in the cavity 11. At the same time, it reduces the structural strength of the area of ​​the main body 10 located in the recessed structure 141, making the area of ​​the main body 10 located in the recessed structure 141 more susceptible to deformation under stress. Therefore, when H ≤ R, the cavity 11 can retain relatively sufficient and reasonable space. Under such spatial conditions, designers can arrange the positions of internal components more flexibly. Simultaneously, it ensures that the area of ​​the main body 10 located in the recessed structure 141 maintains good structural integrity and ensures the structural strength of the area of ​​the main body 10 located in the recessed structure 141, making the area of ​​the main body 10 located in the recessed structure 141 less prone to deformation under stress.

[0044] In some embodiments, a plurality of positioning posts 151 are provided on the inner surface of the second sidewall 15. These positioning posts 151 are arranged around the perimeter and correspond to the edge of the notch 142. Each positioning post 151 is provided with a positioning groove 152. By arranging the positioning posts 151 around the perimeter and corresponding to the edge of the notch 142, the positioning posts 151 can provide clear installation position guidance for other components during installation. The positioning grooves 152 on the positioning posts 151 can further restrict the installation position of the components, preventing them from shifting during installation. Simultaneously, the correspondence between the multiple positioning posts 151 and the edge of the notch 142 not only enhances the structural strength of the second sidewall 15 but also allows for multi-point connections between the installed components and the sliding arm structure 100. This multi-point connection effectively disperses the stress at the connection point 20, improving the strength and stability of the connection. When the sliding arm is subjected to external force, the multi-point connection can reduce the deformation and loosening of the connection part 20, ensuring that the component and the sliding arm structure 100 always maintain a tight connection, thereby enhancing the structural stability of the entire sliding arm structure 100.

[0045] Understandably, when a component that mates with notch 142 needs to be installed onto the sliding arm structure 100, the protruding post of the component engages with the positioning groove 152 of the positioning post 151, effectively enabling the detachable installation of the component onto the sliding arm structure 100. Simultaneously, the component can smoothly enter the installation position along the guide of the positioning post 151, avoiding installation difficulties or component damage due to inaccurate installation positioning, thereby improving the accuracy and success rate of installation.

[0046] In some embodiments, the second sidewall 15 is provided with a third through hole 153, which corresponds to the position of the notch 142 and communicates with the cavity 11. An annular protrusion 30 is provided on the outer surface of the second sidewall 15, coaxially arranged with the third through hole 153. An annular recess 31 is provided on the outer side of the annular protrusion 30. By aligning the third through hole 153 of the second sidewall 15 with the notch 142 and communicating with the cavity 11, a positioning reference is effectively provided for the installation of the fine-tuning structure. When installing the fine-tuning structure, the operator can use the positional relationship between the notch 142 and the third through hole 153 to install the corresponding components of the fine-tuning structure to the designated position, ensuring accurate relative positioning between the fine-tuning structure and the main body 10, and avoiding functional abnormalities or performance degradation due to installation deviations. The annular protrusion 30 and annular recess 31 are coaxially aligned with the third through hole 153. These features assist in the installation of the fine-tuning structure, which can be mounted on the annular protrusion 30 and engaged with the annular recess 31. For example, the knob of the fine-tuning structure. Simultaneously, the annular protrusion 30 increases the thickness and strength of the second sidewall 15, making it less prone to deformation under external forces.

[0047] In some embodiments, the first through hole 121 includes a first hole segment 122, a second hole segment 123, and a third hole segment 124. The second hole segment 123 connects the first hole segment 122 and the third hole segment 124. The first hole segment 122 communicates with the cavity 11. The diameter F of the first hole segment 122, the diameter G of the second hole segment 123, the diameter T of the third hole segment 124, and the diameter L of the cavity 11 satisfy the following relationships: G≥H, G>F≥L. Through the combined use of the first hole segment 122, the second hole segment 123, and the third hole segment 124, the first hole segment 122 and the third hole segment 124 are connected through the second hole segment 123, and the first hole segment 122 is connected to the cavity 11, effectively realizing the connection between the first through hole 121 and the cavity 11. By ensuring G≥H and G>F≥L, a stepped transition structure is effectively formed. When the end of the headband is inserted into the cavity 11 through the first through hole 121, the different diameter segments can match the corresponding parts of the end of the headband, ensuring the connection stability between the headband and the sliding arm structure 100 and avoiding loosening or shaking caused by size mismatch. At the same time, the larger diameter G of the second hole segment 123 provides a certain guiding and accommodating space for the end of the headband during insertion, allowing the headband to enter the first through hole 121 more smoothly.

[0048] In some embodiments, the third hole segment 124 includes a straight hole segment 125 and a variable diameter segment 126. The variable diameter segment 126 is connected to the second hole segment 123 through the straight hole segment 125. Along the direction from the straight hole segment 125 to the variable diameter segment 126, the diameter of the variable diameter segment 126 gradually increases. The maximum diameter P of the variable diameter segment 126 and the diameter G of the second hole segment 123 satisfy the relationship: G = P. Through the combined use of the straight hole segment 125 and the variable diameter segment 126, the diameter of the variable diameter segment 126 gradually increases along the direction from the straight hole segment 125 to the variable diameter segment 126, effectively making the variable diameter segment 126 form a funnel-shaped guiding structure. When the end of the headband is inserted into the cavity 11 through the first through hole 121, the variable diameter section 126 can guide the headband to the straight hole section 125, making it easier for the headband to pass through the first through hole 121 and enter the cavity 11, effectively reducing the difficulty of inserting the end of the headband into the cavity 11 and improving installation efficiency.

[0049] In some embodiments, when F > L, a step 40 is formed at the connection between the first hole segment 122 and the cavity 11. A limiting block 41 is provided on the step 40, and the limiting block 41 is connected to the inner wall of the first hole segment 122. The width of the limiting block 41 is smaller than the width of the step 40. Through the cooperative use of the step 40 and the limiting block 41, the step 40 is set at the connection between the first hole segment 122 and the cavity 11. During the sliding process, when the end of the headband contacts the step 40 or the limiting block 41, the end of the headband can be positioned in a specific position, avoiding over-insertion or under-insertion of the headband during installation, thus improving the accuracy and efficiency of installation. At the same time, the limiting block 41 has a certain foolproof function, restricting the headband to be inserted only in the correct direction. If the headband attempts to be installed in the opposite direction, it will be blocked by the limiting block 41, thereby avoiding subsequent use problems caused by installation errors, reducing the installation error rate, and improving the assembly quality of the product. Furthermore, by making the width of the limiting block 41 smaller than the width of the step 40, interference is effectively avoided when inserting the end of the headband into the cavity 11, preventing the end of the headband from being inserted into the cavity 11.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A sliding arm structure, characterized in that: The system includes a main body (10), which is cylindrical and has a coaxially nested cavity (11) inside. The main body (10) has a first end (12) and a second end (13). The first end (12) has a first through hole (121) that communicates with the cavity (11). The second end (13) has a connecting part (20) and a second through hole (21) that penetrates the connecting part (20) along the thickness direction (a).

2. The sliding arm structure as described in claim 1, characterized in that: The main body (10) includes a first sidewall (14) and a second sidewall (15), which surround the main body (10). The first sidewall (14) bends to form a first arcuate wall along the cavity (11) toward the first sidewall (14), and the second sidewall (15) bends to form a second arcuate wall.

3. The sliding arm structure as described in claim 2, characterized in that: The curvature of the first arc-shaped wall and the curvature of the second arc-shaped wall both gradually decrease from the first end (12) to the second end (13).

4. The sliding arm structure as described in claim 2, characterized in that: The first sidewall (14) is provided with a recessed structure (141), which is formed by recessing from the outer surface of the main body (10) toward the cavity (11). The recessed structure (141) is provided with a notch (142), which communicates with the cavity (11). The shape of the notch (142) corresponds to the shape of the recessed structure (141). The recessed depth H of the recessed structure (141) and the radius R of the first sidewall (14) satisfy the relationship: H≤R.

5. The sliding arm structure as described in claim 4, characterized in that: The inner side of the second sidewall (15) is provided with a plurality of positioning posts (151), which are arranged around the perimeter and correspond to the edge position of the notch (142). Each positioning post (151) is provided with a positioning groove (152).

6. The sliding arm structure as described in claim 4, characterized in that: The second sidewall (15) is provided with a third through hole (153), the third through hole (153) corresponds to the position of the notch (142), and the third through hole (153) communicates with the cavity (11). The outer side of the second sidewall (15) is provided with an annular protrusion (30), the annular protrusion (30) is coaxially arranged with the third through hole (153), and an annular recess (31) is provided on the outer side of the annular protrusion (30).

7. The sliding arm structure as described in claim 1, characterized in that: The first through hole (121) includes a first hole segment (122), a second hole segment (123) and a third hole segment (124). The second hole segment (123) connects the first hole segment (122) and the third hole segment (124). The first hole segment (122) communicates with the cavity (11). The diameter F of the first hole segment (122), the diameter G of the second hole segment (123), the diameter T of the third hole segment (124) and the diameter L of the cavity (11) satisfy the following relationship: G≥H, G>F≥L.

8. The sliding arm structure as described in claim 7, characterized in that: The third hole section (124) includes a straight hole section (125) and a variable diameter section (126). The variable diameter section (126) is connected to the second hole section (123) through the straight hole section (125). Along the direction from the straight hole section (125) to the variable diameter section (126), the diameter of the variable diameter section (126) gradually increases. The maximum diameter P of the variable diameter section (126) and the diameter G of the second hole section (123) satisfy the relationship: G = P.

9. The sliding arm structure as described in claim 7, characterized in that: When F > L, a step (40) is formed at the connection between the first hole segment (122) and the cavity (11). A limiting block (41) is provided on the step (40). The limiting block (41) is connected to the inner wall of the first hole segment (122). The width of the limiting block (41) is smaller than the width of the step (40).

10. A type of over-ear headphone, characterized in that: The headband, the sound-generating unit, and the sliding arm structure according to any one of claims 1 to 9, wherein the sound-generating unit is connected to the end wall of the headband via the sliding arm structure (100), and the headband is at least partially inserted into the cavity (11) and is slidably connected to the cavity (11).

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