WO2021031119A1 - 降噪耳机 - Google Patents
降噪耳机 Download PDFInfo
- Publication number
- WO2021031119A1 WO2021031119A1 PCT/CN2019/101578 CN2019101578W WO2021031119A1 WO 2021031119 A1 WO2021031119 A1 WO 2021031119A1 CN 2019101578 W CN2019101578 W CN 2019101578W WO 2021031119 A1 WO2021031119 A1 WO 2021031119A1
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- WO
- WIPO (PCT)
- Prior art keywords
- rotating
- bracket
- clamping
- noise reduction
- vent
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
Definitions
- This solution relates to the field of earphone technology, and more specifically, to a noise reduction earphone.
- the air pressure in the front cavity of the earphones needs to be consistent with the ambient air pressure.
- the vibration generated by the horn during earphones will cause the air pressure in the front cavity to change, and the structure of the earphones is affected.
- Abrupt changes in external force may also change the air pressure in the front cavity of the earphone, making it difficult to keep the air pressure in the front cavity of the earphone consistent with the outside world during the use of the earphone.
- the purpose of this solution is to provide a noise reduction earphone to solve the technical problem of keeping the air pressure of the front cavity of the earphone consistent with the outside world in the prior art.
- the technical solution adopted by this solution is to provide a noise reduction earphone including a shell, a front cover connected to the shell and enclosed with the shell to form a front cavity, and a speaker installed on the front cover , And a rear cover connected with the front cover and located in the front cavity; the rear cover is arranged outside the horn; and the front cover is provided with a vent hole communicating with the front cavity.
- the fixing piece further includes a fixing piece connected with the front cover and an earmuff installed on the fixing piece; the fixing piece is provided with a clamping piece adapted to the vent hole, and the clamping piece It is clamped in the vent hole with the front cover; the clamping member is provided with a vent gap, the vent gap communicates with the front cavity, and the vent gap communicates with the outside of the front cavity.
- the clamping member includes two clamping vertical plates that are opposed and spaced apart, and a gap between the two clamping vertical plates forms the vent gap; at least one end of the clamping vertical plate There is a clamping protrusion, the clamping protrusion is located at an end of the clamping stand plate away from the body of the fixing member; the inner wall of the vent hole is provided with a clamping groove adapted to the clamping protrusion .
- the fixing member is provided with a vent groove, and the vent gap is in communication with the vent groove;
- the vent groove is a circular groove, the number of the clamping members is multiple, and the plurality of the clamping members The parts are all located on the venting groove, and there is a gap between the adjacent clamping parts.
- it also includes a headgear body, and a stretching arm slidably mounted on the headgear body; the shell is connected to the stretching arm; a scale plate is provided on the headgear body; the stretching arm is connected to the A limiting elastic piece is arranged between the headgear body, and the limiting elastic piece is used to restrict the stretching arm from sliding relative to the headgear body.
- the headgear body has a sliding guide plate
- the stretching arm includes a sliding frame sleeved on the outside of the sliding guide plate and slidably connected to the sliding guide plate; the sliding frame has a sliding cavity, and the sliding frame The guide plate is located in the sliding cavity.
- the limiting elastic member is a stainless steel bending member fixedly installed on the sliding guide plate; the inner wall of the sliding cavity is provided with a plurality of positioning grooves, and the plurality of positioning grooves are along the length of the sliding frame. The directions are arranged in sequence; the stainless steel bending piece has positioning protrusions adapted to the positioning grooves.
- the sliding guide plate is provided with a fixing hole;
- the stainless steel bending part has an abutting portion that abuts against the inner wall of the fixing hole, and is pressed between the scale plate and the sliding guide plate
- the pressing portion; the abutting portion and the pressing portion are respectively located on opposite sides of the positioning protrusion.
- the stretching arm further includes a rotating bracket rotatably connected with the sliding frame, a spacer arranged between the rotating bracket and the sliding frame, and a spacer arranged between the rotating bracket and the sliding frame
- the housing is connected to the rotating bracket, and the rotating bracket is rotatably connected to the sliding frame through the rotating shaft; one side of the spacer is arranged in contact with the sliding frame, the The other side of the spacer is arranged in contact with the rotating bracket.
- the rotating bracket is provided with a rotating mounting component, one end of the rotating shaft is rotatably connected with the rotating mounting component, and the other end of the rotating shaft is connected with the headgear main body.
- the rotating support includes a first support and a second support connected to the first support, and the first support and the second support are enclosed to form a mounting cavity;
- the rotating mounting assembly includes a The rotating mounting plate in the installation cavity, the rotating bracket is provided with a first giving way hole, the rotating mounting plate is provided with a second giving way hole, and the rotating shaft passes through the first giving way hole and passes through the The second relief hole;
- the rotation shaft is provided with a limit protrusion, the limit protrusion is located on the side of the rotating mounting plate away from the headgear body.
- the rotating mounting plate is provided with a relief notch that is adapted to the limiting protrusion and communicates with the second relief hole; the rotating mounting assembly further includes a position located far away from the rotating mounting plate.
- the arc-shaped gasket is provided with a closed protrusion inserted into the recess; the arc-shaped gasket is provided with a connection through hole, and the second bracket is provided with a threaded post, A connecting screw is arranged between the arc-shaped washer and the second bracket, and the connecting screw penetrates the connecting through hole and is threadedly connected with the threaded column.
- the front cover and the housing form a front cavity.
- the front cover is provided with a vent hole communicating with the front cavity. Therefore, the vent hole connects the front cavity with the outside, so that the gas in the front cavity can be discharged through the vent hole, so that The gas in the front cavity can be discharged in time to keep the air pressure in the front cavity consistent with the outside world when the earphone is used, ensuring the effect of noise reduction.
- FIG. 1 is a schematic structural diagram of a noise reduction earphone provided by an embodiment of the solution
- Figure 2 is a cross-sectional view along line A-A in Figure 1;
- Fig. 3 is an exploded view of a part of the structure of the noise reduction earphone in Fig. 1;
- Fig. 4 is a schematic structural diagram of the fixing member in Fig. 3;
- Fig. 5 is a schematic diagram of the structure of the headgear body and the stretching arm in Fig. 1 after being assembled;
- Figure 6 is a sectional view taken along line B-B in Figure 5;
- Figure 7 is a partial exploded view of the headgear body and the stretching arm in Figure 1;
- Fixing part 61. Clamping part; 611. Vent gap; 612. Clamping vertical plate; 6121, clamping protrusion; 62. Venting groove;
- Headgear body 81, scale plate; 82, sliding guide plate; 821, fixing hole;
- Stretching arm 91. Limiting elastic part; 911, stainless steel bending part; 9111, positioning protrusion; 9112, abutting part; 9113, pressing part; 92, sliding frame; 921, sliding cavity; 922, Positioning groove; 93, rotating bracket; 931, first bracket; 932, second bracket; 9321, threaded post; 933, first relief hole; 934, mounting cavity; 94, spacer; 95, rotating shaft; 951, 96.
- Rotating mounting assembly 9611. Rotating mounting plate; 9611, second relief hole; 9612, relief gap; 962, arc-shaped gasket; 9621, arc groove; 9622, closed protrusion; 9623. Connect through holes.
- first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
- the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
- “multiple” means two or more, unless otherwise clearly defined.
- the noise reduction earphone includes a housing 1, a front cover connected to the housing 1 and enclosing the housing 1 to form a front cavity 3, a speaker 4 installed on the front cover 2, and a speaker 4 connected to the front cover 2 and located in the front cavity 3
- the rear cover 5; the rear cover 5 is set on the outside of the horn 4; the front cover 2 is provided with a vent 21 communicating with the front cavity 3.
- the noise reduction earphone provided by this solution has the front cover 2 and the housing 1 enclosed to form a front cavity 3.
- the front cover 2 is provided with a vent 21 communicating with the front cavity 3, so the vent 21 will
- the front cavity 3 is connected to the outside, so that the gas in the front cavity 3 can be discharged through the vent 21, so that the gas in the front cavity 3 can be discharged to the outside in time, thereby keeping the air pressure of the front cavity 3 consistent with the outside when the earphone is used , To ensure the effect of noise reduction.
- the back cover 5 is located inside the front cavity 3, and the back cover 5 is arranged outside the horn 4, so the back cover 5 isolates the horn 4 from the front cavity 3, and the airflow in the front cavity 3 will not affect the work of the horn 4, ensuring The sound effect of headphones.
- the position and size of the back cover 5 and the speaker 4 can remain unchanged.
- the speaker 4, and the front cover 2. It forms a fixed and independent acoustic component that does not change with the size of the headset. Therefore, after the size of the headset is changed, there is no need to further set the noise reduction of the speaker 4, and the previous noise reduction parameters can be used to achieve The versatility of the noise reduction parameters after the rear cover 5, the speaker 4 and the front cover 2 are combined is improved.
- FIGS. 3 to 4 as another specific implementation of the noise reduction earphone provided by this solution, it further includes a fixing member 6 connected to the front cover 2 and an earmuff 7 installed on the fixing member 6;
- the fixing member 6 is provided with a clamping piece 61 adapted to the vent hole 21, the clamping piece 61 is clamped with the front cover 2 in the vent hole 21;
- the clamping piece 61 is provided with a vent gap 611, the vent gap 611 and the front
- the cavity 3 communicates, and the vent gap 611 communicates with the outside of the front cavity 3.
- the clamping member 61 on the fixing member 6 is engaged with the front cover 2 through the vent hole 21, so that the fixing member 6 is installed on the front cover 2.
- the clamping member 61 is provided with a vent gap 611 and a vent gap 611 At the same time, it communicates with the front cavity 3 and the outside of the front cavity 3, so the vent gap 611 connects the front cavity 3 with the outside, so that the gas in the front cavity 3 can be discharged through the vent gap 611, so the clamping member 61 realizes the clamping connection
- the front cavity 3 is communicated with the outside, so that the gas in the front cavity 3 can be discharged to the outside in time, thereby keeping the air pressure of the front cavity 3 consistent with the outside when the earphone is used, and ensuring the effect of noise reduction.
- the clip 61 realizes the clip fit and also communicates the front cavity 3 with the outside, there is no need to provide an additional clip position on the front cover 2, which simplifies the structure of the earphone.
- the clip 61 blocks the position of the vent hole 21, prevents the vent hole 21 from being directly exposed, and prevents dust and foreign objects from entering.
- the principle that the deflation gap 611 communicates with the front cavity 3 and the exterior of the front cavity 3 is that since there is no seal between the fixing member 6 and the front cover 2, the deflation gap 611 on the clamping member 61 extends out of the card access hole. It can communicate with the outside of the front cavity 3.
- the clip 61 includes two clip stand plates 612 arranged oppositely and spaced apart.
- the gap between the plates 612 forms a vent gap 611; and because there is a gap between the clamping vertical plates 612, the clamping member 61 can be deformed when inserted into the vent hole 21 so as to be firmly engaged with the front cover 2.
- the end of at least one clamping vertical plate 612 has a clamping protrusion 6121, which is located at the end of the clamping vertical plate 612 away from the body of the fixing member 6; the inner wall of the vent hole 21 is provided with a clamping protrusion 6121 From the 6121 card slot 211.
- the clamping protrusion 6121 on the clamping vertical plate 612 is embedded in the clamping groove 211 to prevent the clamping vertical plate 612 of the clamping member 61 from connecting to the front
- the cover 2 is detached to further realize the stability of the card connection.
- the fixing member 6 is provided with a vent groove 62, and the vent gap 611 communicates with the vent groove 62; due to the vent groove 6242 It has a certain length, and the deflation gap 611411 communicates with the deflation groove 6242, so the position where the deflation gap 611411 communicates with the outside of the front cavity 33 is significantly larger (it can also prevent the front cover 22 and the fixing member 64 from contacting too tightly at a certain position.
- the vent groove 62 is a circular groove, and the number of the clamping members 61 is multiple.
- the plurality of clamping members 61 are all located on the vent groove 62 with gaps between adjacent clamping members 61.
- the multiple clamping members 6141 are all located on the vent groove 6242, and the vent groove 6242 is a circular groove, so it is ensured that the vent notches 611411 on the clamping member 6141 at multiple positions of the front cover 22 can vent outward, that is, the front cavity 33 can deflate outward through multiple locations to further ensure the timeliness and rapidity of deflation.
- the noise reduction earphone also includes a headgear body 8, and a stretch arm 9 slidably mounted on the headgear body 8;
- the extension arms 9 are connected;
- the headgear body 8 is provided with a scale plate 81; there is a limiting elastic member 91 between the stretching arm 9 and the headgear body 8, and the limiting elastic member 91 is used to restrict the stretching arm 9 from sliding relative to the headgear body 8.
- the headgear body 8 and the stretching arm 9 are used to put on the user's head.
- the user hangs the headphone headgear on the head for the first time and pulls the stretching arm 9 to slide relative to the headgear body 8 to adjust to a proper Wearing length, at this time, you can take off the headgear body 8 and observe the scale value on the scale plate 81.
- the scale value is a suitable scale value.
- you use noise-reducing headphones pull the stretching arm 9 relative to the head before you wear it.
- the headgear body 8 slides so that the scale value on the scale plate 81 reaches the above-mentioned appropriate scale value, and then the headgear body 8 is placed on the user's head; thereby avoiding the headgear body 8 and the stretching arm after each wearing on the head Adjust the length between 9 to an appropriate length.
- adjusting the length between the headgear body 8 and the stretching arm 9 after being worn on the head can easily jam the user's hair, and the user experience is poor.
- the headgear body 8 has a sliding guide plate 82
- the stretching arm 9 includes a sliding guide plate 82 that is sleeved outside and
- the sliding frame 92 is slidably connected with the sliding guide 82;
- the sliding frame 92 has a sliding cavity 921, and the sliding guide 82 is located in the sliding cavity 921. That is, the stretching arm 9 is slidably connected to the sliding guide plate 82 on the headgear body 8 through its sliding frame 92, so as to realize sliding installation on the headgear body 8.
- the sliding frame 92 is sleeved on the outside of the sliding guide plate 82 to ensure stretching The stability of the arm 9 as a whole slides.
- the limit elastic member 91 is a stainless steel bending member 911 fixedly installed on the sliding guide plate 82; the inner wall of the sliding cavity 921 is opened There are a plurality of positioning grooves 922, and the plurality of positioning grooves 922 are sequentially arranged along the length direction of the sliding frame 92; the stainless steel bending piece 911 has positioning protrusions 9111 adapted to the positioning grooves 922.
- the stretching arm 9 slides to a different position, the positioning protrusion 9111 on the stainless steel bending piece 911 is inserted into the corresponding positioning groove 922, thereby realizing the fixation of the position of the stretching arm 9.
- a fixing hole 821 is opened on the sliding guide plate 82; the stainless steel bending piece 911 has an inner wall with the fixing hole 821
- the abutting portion 9112 and the pressing portion 9113 pressed between the scale plate 81 and the sliding guide 82; the abutting portion 9112 and the pressing portion 9113 are located on opposite sides of the positioning protrusion 9111, respectively. That is, the stainless steel bending piece 911 abuts against the inner wall of the fixing hole 821 through the abutment portion 9112 at one end, and the other end is pressed between the scale plate 81 and the sliding guide plate 82, thereby realizing the fixing of the stainless steel bending piece 911 installation.
- the stretching arm 9 further includes a rotating bracket 93 rotatably connected with the sliding bracket 92, and is arranged on the rotating bracket 93 and The spacer 94 between the sliding frames 92 and the rotating shaft 95 provided between the rotating frame 93 and the sliding frame 92; the housing 1 is connected to the rotating frame 93, and the rotating frame 93 is rotatably connected to the sliding frame 92 through the rotating shaft 95; One side of the sheet 94 is arranged in contact with the sliding frame 92, and the other side of the spacer 94 is arranged in contact with the rotating bracket 93.
- the spacer 94 is provided between the rotating bracket 93 and the sliding bracket 92, and the opposite sides of the spacer 94 are respectively arranged in contact with the rotating bracket 93 and the sliding bracket 92, so the rotating bracket 93 is opposite to the sliding frame.
- the rotating bracket 93 and the sliding bracket 92 there will be no contact between the rotating bracket 93 and the sliding bracket 92, that is, the rotating bracket 93 and the sliding bracket 92 will not rub against each other, thereby avoiding friction and dusting or mutual fraying, so that the headset The headgear is not easy to damage, thereby prolonging the service life of the headset.
- the spacer 94 can choose a material that is not easy to rub against the plastic material, or a part with a smooth surface to further reduce the friction loss of the rotating bracket 93 and the sliding frame 92 during use. speed.
- the isolation sheet 94 is a ceramic sheet, a silica gel sheet or a glass sheet. The ceramic sheet, silicone sheet or glass sheet has good wear resistance, and it is not easy to grind the plastic rotating bracket 93 and the sliding bracket 92, which prolongs the service life of the earphone.
- a rotating mounting assembly 96 is provided in the rotating bracket 93, and one end of the rotating shaft 95 is rotatably connected with the rotating mounting assembly 96 , The other end of the rotating shaft 95 is connected with the headgear body.
- One end of the rotating shaft 95 is connected to the sliding frame 92, and the other end of the rotating shaft 95 is rotatably connected to the rotating frame 93 through the rotating mounting assembly 96.
- the rotating bracket 93 includes a first bracket 931 and a second bracket 932 connected to the first bracket 931.
- the bracket 931 and the second bracket 932 enclose a mounting cavity 934;
- the rotating mounting assembly 96 includes a rotating mounting plate 961 located in the mounting cavity 934, the rotating bracket 93 is provided with a first clearance hole 933, and the rotating mounting plate 961 is provided
- the second relief hole 9611, the rotation shaft 95 penetrates the first relief hole 933 and penetrates the second relief hole 9611;
- the rotation shaft 95 is provided with a limiting protrusion 951, which is located on the rotating mounting plate 961 away from the headgear body Side.
- the rotating shaft 95 extends into the mounting cavity 934 through the first relief hole 933 and penetrates the second relief hole 9611 to the side of the rotating mounting plate 961 away from the headgear body.
- the limiting protrusion 951 on the rotating shaft 95 can prevent rotation
- the shaft 95 moves relative to the rotating mounting plate 961 along the axis of the rotating shaft 95 to prevent the rotating shaft 95 from detaching from the rotating mounting plate 961 and the rotating bracket 93 to ensure the stability of the rotating shaft 95 on the rotating bracket 93.
- the rotating mounting plate 961 is provided with a relief adapted to the limiting protrusion 951 and communicating with the second relief hole 9611.
- Position gap 9612; the rotating mounting assembly 96 also includes an arc-shaped gasket 962 on the side of the rotating mounting plate 961 away from the headgear body, the arc-shaped gasket 962 is connected to the second bracket 932, and the arc-shaped gasket 962 is provided with an arc groove 9621, the rotating shaft 95 is located in the circular arc groove 9621, and both ends of the arc-shaped washer 962 are used to resist the limiting protrusion 951 to limit the rotation angle of the rotating shaft 95.
- the relief gap 9612 is used for the passage of the limiting protrusion 951, so that when the stretching arm 9 is assembled, the rotation shaft 95 can smoothly penetrate the second relief hole 9611, and the rotation shaft 95 will rotate after passing through the second relief hole 9611
- the shaft 95 rotates to a certain angle to make the limiting protrusion 951 far away from the clearance gap 9612, and then install an arc-shaped washer 962 to limit the rotation angle of the rotating shaft 95, effectively preventing the limiting protrusion 951 from rotating to the clearance gap 9612 and the rotating mounting plate 961 is disengaged to improve the stability of the installation of the rotating shaft 95.
- the arc-shaped gasket 962 is provided with a closed protrusion 9622 inserted into the recess 9612; the arc-shaped gasket A connecting through hole 9623 is opened on the 962, a threaded column 9321 is provided on the second bracket 932, a connecting screw is arranged between the arc-shaped washer 962 and the second bracket 932, and the connecting screw penetrates the connecting through hole 9623 and is threaded with the threaded column 9321 connection.
- the arc-shaped washer 962 is provided with a closed protrusion 9622 inserted in the recess 9612 to avoid excessive force on the rotating shaft 95, and the rotating shaft 95 drives the limiting protrusion 951 to rotate at an excessively large angle (for example, the rotating shaft 95 is deformed or the arc-shaped washer 962 is deformed) to the clearance gap 9612 and detaches from the rotating mounting plate 961 to improve the stability of the mounting of the rotating shaft 95.
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- Headphones And Earphones (AREA)
Abstract
本方案提供了一种降噪耳机。该降噪耳机包括外壳（1）、与外壳（1）相连且与外壳（1）围合形成前腔（3）的前盖（2）、安装于前盖（2）的喇叭（4），以及与前盖（2）相连且位于前腔（3）内的后盖（5）；后盖（5）罩设于喇叭（4）的外部；前盖（2）上开设有与前腔（3）相通的泄气孔（21）。前盖（2）与外壳（1）围合形成前腔（3），在前盖（2）上开设有与前腔（3）相通的泄气孔（21），因此泄气孔（21）将前腔（3）与外部相连通，使得前腔（3）内的气体可通过泄气孔（21）向外排出，使得前腔（3）的气体能够及时向外泄出，进而保持耳机使用时前腔（3）的气压与外界一致，保证了降噪的效果。
Description
本方案涉及耳机技术领域，更具体地说，是涉及一种降噪耳机。
为了保证降噪耳机使用时的降噪效果，需要使得耳机的前腔内的气压与环境气压保持一致，而耳机工作时由于喇叭产生的震动会导致前腔内部的气压变化，且耳机自身结构受外力突变时也可能使得耳机前腔内部的气压的变化，使得耳机使用过程中其前腔的气压很难与外界保持一致，为了保持耳机的降噪效果，需要保持耳机前腔的气压与外界一致。
本方案的目的在于提供一种降噪耳机，以解决现有技术中存在的需要保持耳机前腔的气压与外界一致的技术问题。
为实现上述目的，本方案采用的技术方案是：提供一种降噪耳机，包括外壳、与所述外壳相连且与所述外壳围合形成前腔的前盖、安装于所述前盖的喇叭，以及与所述前盖相连且位于所述前腔内的后盖；所述后盖罩设于所述喇叭的外部；所述前盖上开设有与所述前腔相通的泄气孔。
进一步地，还包括与所述前盖相连的固定件，以及安装于所述固定件的耳罩；所述固定件上设有适配于所述泄气孔的卡接件，所述卡接件于所述泄气孔内与所述前盖卡接；所述卡接件上开设有泄气缺口，所述泄气缺口与所述前腔相通，所述泄气缺口与所述前腔的外部相通。
进一步地，所述卡接件包括相对且间隔设置的两个卡接立板，两个所述卡接立板之间的间隙形成所述泄气缺口；至少一个所述卡接立板的端部具有卡接凸起，所述卡接凸起位于所述卡接立板远离所述固定件的本体的一端；所述泄气孔的内壁开设有适配于所述卡接凸起的卡接槽。
进一步地，所述固定件上开设有泄气槽，所述泄气缺口与所述泄气槽相通；所述泄气槽为圆环槽，所述卡接件的数量为多个，多个所述卡接件均位于所述泄气槽上，相邻所述卡接件之间具有间隙。
进一步地，还包括头套本体，以及滑动安装于所述头套本体的拉伸臂；所述外壳与所述拉伸臂相连；所述头套本体上设有刻度板；所述拉伸臂与所述头套本体之间设有限位弹性件，所述限位弹性件用于限制所述拉伸臂相对所述头套本体滑动。
进一步地，所述头套本体上具有滑动导板，所述拉伸臂包括套设于所述滑动导板的外部且与所述滑动导板滑动连接的滑动架；所述滑动架具有滑动腔，所述滑动导板位于所述滑动腔内。
进一步地，所述限位弹性件为固定安装于所述滑动导板上的不锈钢弯折件；所述滑动腔的内壁开设有多个定位槽，多个所述定位槽沿所述滑动架的长度方向依次设置；所述不锈钢弯折件上具有适配于所述定位槽的定位凸起。
进一步地，所述滑动导板上开设有固定孔；所述不锈钢弯折件上具有与所述固定孔的内壁相抵接的抵接部，以及压持于所述刻度板与所述滑动导板之间的压紧部；所述抵接部与所述压紧部分别位于所述定位凸起的相对的两侧。
进一步地，所述拉伸臂还包括与所述滑动架转动连接的旋转支架、设于所述旋转支架与所述滑动架之间的隔离片，以及设于所述旋转支架与所述滑动架之间的转动轴；所述外壳与所述旋转支架相连，所述旋转支架通过所述转动轴与所述滑动架转动连接；所述隔离片的一侧与所述滑动架接触设置，所述隔离片的另一侧与所述旋转支架接触设置。
进一步地，所述旋转支架内设有转动安装组件，所述转动轴的一端与所述转动安装组件转动连接，所述转动轴的另一端与所述头套主体相连。
进一步地，所述旋转支架包括第一支架及与所述第一支架相连的第二支架，所述第一支架与所述第二支架围合形成安装腔；所述转动安装组件包括位于所述安装腔内的转动安装板，所述旋转支架上开设有第一让位孔，所述转动安装板上开设有第二让位孔，所述转动轴贯穿所述第一让位孔并贯穿所述第二让位孔；所述转动轴上设有限位凸起，所述限位凸起位于所述转动安装板远离所述头套主体的一侧。
进一步地，所述转动安装板上开设有适配于所述限位凸起且与所述第二让位孔相通的让位缺口；所述转动安装组件还包括位于所述转动安装板远离所述头套主体的一侧弧形垫片，所述弧形垫片与所述第二支架相连，所述弧形垫片上设有圆弧槽，所述转动轴位于所述圆弧槽内，所述弧形垫片的两端用于抵挡所述限位凸起以限制所述转动轴的转动角度。
进一步地，所述弧形垫片上设有插设于所述让位缺口内的封闭凸起；所述弧形垫片上开设有连接通孔，所述第二支架上设有螺纹柱，所述弧形垫片与所述第二支架之间设有连接螺钉，所述连接螺钉贯穿所述连接通孔并与所述螺纹柱螺纹连接。
前盖与外壳围合形成前腔，在前盖上开设有与前腔相通的泄气孔，因此泄气孔将前腔与外部相连通，使得前腔内的气体可通过泄气孔向外排出，使得前腔的气体能够及时向外泄出，进而保持耳机使用时前腔的气压与外界一致，保证了降噪的效果。
为了更清楚地说明本方案实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本方案的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本方案实施例提供的降噪耳机的结构示意图；
图2为沿图1中A-A线的剖视图；
图3为图1中的降噪耳机的部分结构的分解图；
图4为图3中的固定件的结构示意图；
图5为图1中头套本体与拉伸臂装配后的结构示意图；
图6为沿图5中B-B线的剖视图；
图7为图1中头套本体与拉伸臂的局部分解图；
图中：
1、外壳；
2、前盖；21、泄气孔；211、卡接槽；
3、前腔；4、喇叭；5、后盖；
6、固定件；61、卡接件；611、泄气缺口；612、卡接立板；6121、卡接凸起；62、泄气槽；
7、耳罩；
8、头套本体；81、刻度板；82、滑动导板；821、固定孔；
9、拉伸臂；91、限位弹性件；911、不锈钢弯折件；9111、定位凸起；9112、抵接部；9113、压紧部；92、滑动架；921、滑动腔；922、定位槽；93、旋转支架；931、第一支架；932、第二支架；9321、螺纹柱；933、第一让位孔；934、安装腔；94、隔离片；95、转动轴；951、限位凸起；96、转动安装组件；961、转动安装板；9611、第二让位孔；9612、让位缺口；962、弧形垫片；9621、圆弧槽；9622、封闭凸起；9623、连接通孔。
为了使本方案所要解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本方案进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本方案，并不用于限定本方案。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者间接在该另一个元件上。当一个元件被称为是“连接于”另一个元件，它可以是直接连接到另一个元件或间接连接至该另一个元件上。
需要理解的是，术语“长度”、“宽度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本方案和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本方案的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本方案的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
请一并参阅图1-图3，对本方案提供的降噪耳机进行说明。所述降噪耳机，包括外壳1、与外壳1相连且与外壳1围合形成前腔3的前盖2、安装于前盖2的喇叭4，以及与前盖2相连且位于前腔3内的后盖5；后盖5罩设于喇叭4的外部；前盖2上开设有与前腔3相通的泄气孔21。
本方案提供的降噪耳机，与现有技术相比，前盖2与外壳1围合形成前腔3，在前盖2上开设有与前腔3相通的泄气孔21，因此泄气孔21将前腔3与外部相连通，使得前腔3内的气体可通过泄气孔21向外排出，使得前腔3的气体能够及时向外泄出，进而保持耳机使用时前腔3的气压与外界一致，保证了降噪的效果。
后盖5位于前腔3内部，且后盖5罩设于喇叭4的外部，因此后盖5将喇叭4与前腔3隔离，前腔3内部气流不会影响到喇叭4的工作，保证了耳机的出声效果。同时，当降噪耳机的尺寸改变时，由于后盖5罩设于喇叭4的外部，因此后盖5及喇叭4的位置及尺寸可保持不变，对于后盖5、喇叭4及前盖2的配合，其组成一固定的且独立的声学组件，可以不随着耳机的尺寸改变而改变，因此对于耳机尺寸改变后，无需进一步对喇叭4进行降噪设置，可以沿用之前的降噪参数，实现了后盖5、喇叭4及前盖2配合后降噪参数的通用性。
进一步地，请参阅图3-图4，作为本方案提供的降噪耳机的另一种具体实施方式，还包括与前盖2相连的固定件6，以及安装于固定件6的耳罩7；固定件6上设有适配于泄气孔21的卡接件61，卡接件61于泄气孔21内与前盖2卡接；卡接件61上开设有泄气缺口611，泄气缺口611与前腔3相通，泄气缺口611与前腔3的外部相通。固定件6上的卡接件61通过该泄气孔21与前盖2卡接配合，进而实现固定件6安装于前盖2上，同时在卡接件61上设置有泄气缺口611，泄气缺口611同时与前腔3及前腔3的外部相通，因此泄气缺口611将前腔3与外部相连通，使得前腔3内的气体可通过泄气缺口611向外排出，因此卡接件61实现卡接配合的同时还将前腔3与外部相通，使得前腔3的气体能够及时向外泄出，进而保持耳机使用时前腔3的气压与外界一致，保证了降噪的效果。
由于卡接件61实现卡接配合的同时还将前腔3与外部相通，因此无需在前盖2上设置额外的卡接位置，简化了耳机的结构。且卡接件61阻挡了泄气孔21的位置，避免了泄气孔21的直接外露，避免灰尘及异物的进入。泄气缺口611同时与前腔3及前腔3的外部相通的原理为，由于固定件6与前盖2之间没有密封件，因此卡接件61上的泄气缺口611伸出卡接通孔即可实现与前腔3的外部相通。
进一步地，请参阅图3-图4，作为本方案提供的降噪耳机的另一种具体实施方式，卡接件61包括相对且间隔设置的两个卡接立板612，两个卡接立板612之间的间隙形成泄气缺口611；且由于卡接立板612之间具有间隙，因此卡接件61插入泄气孔21时可发生形变进而与前盖2稳固的卡接配合。至少一个卡接立板612的端部具有卡接凸起6121，卡接凸起6121位于卡接立板612远离固定件6的本体的一端；泄气孔21的内壁开设有适配于卡接凸起6121的卡接槽211。也即卡接件61的卡接立板612插入泄气孔21后，卡接立板612上的卡接凸起6121嵌入卡接槽211内，避免卡接件61的卡接立板612与前盖2脱离，进一步实现卡接的稳固性。
进一步地，请参阅图3-图4，作为本方案提供的降噪耳机的另一种具体实施方式，固定件6上开设有泄气槽62，泄气缺口611与泄气槽62相通；由于泄气槽6242具有一定的长度，且泄气缺口611411与泄气槽6242相通，因此泄气缺口611411与前腔33的外部相通的位置显著变大（还可避免前盖22与固定件64在某个位置接触过于紧密而导致泄气缺口611411向前腔33外部泄气的速度较慢），保证泄气缺口611411向外泄气的快速性。泄气槽62为圆环槽，卡接件61的数量为多个，多个卡接件61均位于泄气槽62上，相邻卡接件61之间具有间隙。多个卡接件6141均位于泄气槽6242上，泄气槽6242为圆环槽，因此保证前盖22的多个位置的卡接件6141上的泄气缺口611411均可向外泄气，也即前腔33可通过多个位置向外泄气，进一步保证泄气的及时性及快速性。
进一步地，请参阅图5-图7，作为本方案提供的降噪耳机的另一种具体实施方式，还包括头套本体8，以及滑动安装于头套本体8的拉伸臂9；外壳1与拉伸臂9相连；头套本体8上设有刻度板81；拉伸臂9与头套本体8之间设有限位弹性件91，限位弹性件91用于限制拉伸臂9相对头套本体8滑动。头套本体8及拉伸臂9用于套设在使用者的头部上，使用者第一次使用时将耳机头套挂在头部后拉动拉伸臂9相对头套本体8滑动进而调节到合适的佩戴长度，此时可摘下头套本体8观察刻度板81上的刻度值，该刻度值为合适刻度值，下一次使用降噪耳机时，在未戴在头部之前先拉动拉伸臂9相对头套本体8滑动使得刻度板81上的刻度值到达上述合适刻度值，再将头套本体8套在使用者的头部；进而避免了每次佩戴到头部之后才能将头套本体8及拉伸臂9之间的长度调节到合适的长度。而佩戴到头部之后再调节头套本体8及拉伸臂9之间的长度容易将使用者的头发卡住，使用时的体验较差。
进一步地，请参阅图5-图7，作为本方案提供的降噪耳机的另一种具体实施方式，头套本体8上具有滑动导板82，拉伸臂9包括套设于滑动导板82的外部且与滑动导板82滑动连接的滑动架92；滑动架92具有滑动腔921，滑动导板82位于滑动腔921内。也即拉伸臂9通过自身的滑动架92与头套本体8上的滑动导板82滑动连接，进而实现滑动安装于头套本体8上，滑动架92套设于滑动导板82的外部，保证了拉伸臂9整体滑动时的稳定性。
进一步地，请参阅图6，作为本方案提供的降噪耳机的另一种具体实施方式，限位弹性件91为固定安装于滑动导板82上的不锈钢弯折件911；滑动腔921的内壁开设有多个定位槽922，多个定位槽922沿滑动架92的长度方向依次设置；不锈钢弯折件911上具有适配于定位槽922的定位凸起9111。当拉伸臂9滑动至不同的位置时，不锈钢弯折件911上的定位凸起9111插入对应的定位槽922内，进而实现对拉伸臂9位置的固定。
进一步地，请参阅图6-图7，作为本方案提供的降噪耳机的另一种具体实施方式，滑动导板82上开设有固定孔821；不锈钢弯折件911上具有与固定孔821的内壁相抵接的抵接部9112，以及压持于刻度板81与滑动导板82之间的压紧部9113；抵接部9112与压紧部9113分别位于定位凸起9111的相对的两侧。也即不锈钢弯折件911通过其一端的抵接部9112抵接于固定孔821的内壁上，另一端被压紧在刻度板81与滑动导板82之间，进而实现不锈钢弯折件911的固定安装。
进一步地，请参阅图6-图7，作为本方案提供的降噪耳机的另一种具体实施方式，拉伸臂9还包括与滑动架92转动连接的旋转支架93、设于旋转支架93与滑动架92之间的隔离片94，以及设于旋转支架93与滑动架92之间的转动轴95；外壳1与旋转支架93相连，旋转支架93通过转动轴95与滑动架92转动连接；隔离片94的一侧与滑动架92接触设置，隔离片94的另一侧与旋转支架93接触设置。转动旋转支架93时，由于旋转支架93与滑动架92之间设置有隔离片94，且隔离片94的相对的两侧分别与旋转支架93及滑动架92接触设置，因此旋转支架93相对滑动架92转动时，旋转支架93与滑动架92之间不会发生接触，也即旋转支架93与滑动架92之间不会相互摩擦，进而避免了摩擦起粉或者相互磨花的情况发生，使得耳机头套不易于损坏，进而延长了耳机的使用寿命。可以理解的是，由于耳机头套主要为塑胶材质，因此隔离片94可选择不易于与塑胶材质相互摩擦的材质，或者表面光滑的部件，以进一步降低旋转支架93与滑动架92在使用时摩擦损耗的速度。隔离片94为陶瓷片、硅胶片或玻璃片。陶瓷片、硅胶片或玻璃片其自身具有较好的耐磨性能，且不易于将塑胶材质的旋转支架93与滑动架92磨花，延长了耳机的使用寿命。
进一步地，请参阅图6-图7，作为本方案提供的降噪耳机的另一种具体实施方式，旋转支架93内设有转动安装组件96，转动轴95的一端与转动安装组件96转动连接，转动轴95的另一端与头套主体相连。转动轴95的一端与滑动架92相连，转动轴95的另一端通过转动安装组件96与旋转支架93转动连接，需要使得旋转支架93相对滑动架92转动时，只需对旋转支架93施加架转动力即可实现旋转支架93相对滑动架92转动。
进一步地，请参阅图6-图7，作为本方案提供的降噪耳机的另一种具体实施方式，旋转支架93包括第一支架931及与第一支架931相连的第二支架932，第一支架931与第二支架932围合形成安装腔934；转动安装组件96包括位于安装腔934内的转动安装板961，旋转支架93上开设有第一让位孔933，转动安装板961上开设有第二让位孔9611，转动轴95贯穿第一让位孔933并贯穿第二让位孔9611；转动轴95上设有限位凸起951，限位凸起951位于转动安装板961远离头套主体的一侧。转动轴95通过第一让位孔933伸入安装腔934内，并贯穿第二让位孔9611到达转动安装板961远离头套主体的一侧，转动轴95上的限位凸起951可避免转动轴95相对转动安装板961沿转动轴95的轴线方向运动，避免转动轴95脱离转动安装板961并脱离旋转支架93，保证转动轴95转动安转于旋转支架93上的稳定性。
进一步地，请参阅图7，作为本方案提供的降噪耳机的另一种具体实施方式，转动安装板961上开设有适配于限位凸起951且与第二让位孔9611相通的让位缺口9612；转动安装组件96还包括位于转动安装板961远离头套主体的一侧弧形垫片962，弧形垫片962与第二支架932相连，弧形垫片962上设有圆弧槽9621，转动轴95位于圆弧槽9621内，弧形垫片962的两端用于抵挡限位凸起951以限制转动轴95的转动角度。让位缺口9612用于限位凸起951的通过，使得拉伸臂9在装配时，转动轴95能顺利贯穿第二让位孔9611，转动轴95贯穿第二让位孔9611后，将转动轴95转动一定角度使得限位凸起951远离让位缺口9612，然后安装弧形垫片962以限制转动轴95的转动角度，有效避免限位凸起951转动至让位缺口9612与转动安装板961脱离，提升转动轴95安装的稳定性。
进一步地，请参阅图7，作为本方案提供的降噪耳机的另一种具体实施方式，弧形垫片962上设有插设于让位缺口9612内的封闭凸起9622；弧形垫片962上开设有连接通孔9623，第二支架932上设有螺纹柱9321，弧形垫片962与第二支架932之间设有连接螺钉，连接螺钉贯穿连接通孔9623并与螺纹柱9321螺纹连接。弧形垫片962上设有插设于让位缺口9612内的封闭凸起9622，避免转动轴95受力过大时，转动轴95带动限位凸起951转动的角度过大（例如转动轴95变形或者弧形垫片962变形）至让位缺口9612而脱离转动安装板961，提升转动轴95安装的稳定性。
可以理解的是，另一种具体实施方式中的方案可为在其他实施例的基础上进一步改进的可实现的实施方案。
显然，本方案的上述实施例仅仅是为了清楚说明本方案所作的举例，而并非是对本方案的实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。凡在本方案的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本方案权利要求的保护范围之内。
Claims (13)
- 降噪耳机，其特征在于，包括外壳、与所述外壳相连且与所述外壳围合形成前腔的前盖、安装于所述前盖的喇叭，以及与所述前盖相连且位于所述前腔内的后盖；所述后盖罩设于所述喇叭的外部；所述前盖上开设有与所述前腔相通的泄气孔。
- 根据权利要求1所述的降噪耳机，其特征在于，还包括与所述前盖相连的固定件，以及安装于所述固定件的耳罩；所述固定件上设有适配于所述泄气孔的卡接件，所述卡接件于所述泄气孔内与所述前盖卡接；所述卡接件上开设有泄气缺口，所述泄气缺口与所述前腔相通，所述泄气缺口与所述前腔的外部相通。
- 根据权利要求2所述的降噪耳机，其特征在于，所述卡接件包括相对且间隔设置的两个卡接立板，两个所述卡接立板之间的间隙形成所述泄气缺口；至少一个所述卡接立板的端部具有卡接凸起，所述卡接凸起位于所述卡接立板远离所述固定件的本体的一端；所述泄气孔的内壁开设有适配于所述卡接凸起的卡接槽。
- 根据权利要求2所述的降噪耳机，其特征在于，所述固定件上开设有泄气槽，所述泄气缺口与所述泄气槽相通；所述泄气槽为圆环槽，所述卡接件的数量为多个，多个所述卡接件均位于所述泄气槽上，相邻所述卡接件之间具有间隙。
- 根据权利要求1所述的降噪耳机，其特征在于，还包括头套本体，以及滑动安装于所述头套本体的拉伸臂；所述外壳与所述拉伸臂相连；所述头套本体上设有刻度板；所述拉伸臂与所述头套本体之间设有限位弹性件，所述限位弹性件用于限制所述拉伸臂相对所述头套本体滑动。
- 根据权利要求5所述的降噪耳机，其特征在于，所述头套本体上具有滑动导板，所述拉伸臂包括套设于所述滑动导板的外部且与所述滑动导板滑动连接的滑动架；所述滑动架具有滑动腔，所述滑动导板位于所述滑动腔内。
- 根据权利要求6所述的降噪耳机，其特征在于，所述限位弹性件为固定安装于所述滑动导板上的不锈钢弯折件；所述滑动腔的内壁开设有多个定位槽，多个所述定位槽沿所述滑动架的长度方向依次设置；所述不锈钢弯折件上具有适配于所述定位槽的定位凸起。
- 根据权利要求7所述的降噪耳机，其特征在于，所述滑动导板上开设有固定孔；所述不锈钢弯折件上具有与所述固定孔的内壁相抵接的抵接部，以及压持于所述刻度板与所述滑动导板之间的压紧部；所述抵接部与所述压紧部分别位于所述定位凸起的相对的两侧。
- 根据权利要求6所述的降噪耳机，其特征在于，所述拉伸臂还包括与所述滑动架转动连接的旋转支架、设于所述旋转支架与所述滑动架之间的隔离片，以及设于所述旋转支架与所述滑动架之间的转动轴；所述外壳与所述旋转支架相连，所述旋转支架通过所述转动轴与所述滑动架转动连接；所述隔离片的一侧与所述滑动架接触设置，所述隔离片的另一侧与所述旋转支架接触设置。
- 根据权利要求9所述的降噪耳机，其特征在于，所述旋转支架内设有转动安装组件，所述转动轴的一端与所述转动安装组件转动连接，所述转动轴的另一端与所述头套主体相连。
- 根据权利要求10所述的降噪耳机，其特征在于，所述旋转支架包括第一支架及与所述第一支架相连的第二支架，所述第一支架与所述第二支架围合形成安装腔；所述转动安装组件包括位于所述安装腔内的转动安装板，所述旋转支架上开设有第一让位孔，所述转动安装板上开设有第二让位孔，所述转动轴贯穿所述第一让位孔并贯穿所述第二让位孔；所述转动轴上设有限位凸起，所述限位凸起位于所述转动安装板远离所述头套主体的一侧。
- 根据权利要求11所述的降噪耳机，其特征在于，所述转动安装板上开设有适配于所述限位凸起且与所述第二让位孔相通的让位缺口；所述转动安装组件还包括位于所述转动安装板远离所述头套主体的一侧弧形垫片，所述弧形垫片与所述第二支架相连，所述弧形垫片上设有圆弧槽，所述转动轴位于所述圆弧槽内，所述弧形垫片的两端用于抵挡所述限位凸起以限制所述转动轴的转动角度。
- 根据权利要求12所述的降噪耳机，其特征在于，所述弧形垫片上设有插设于所述让位缺口内的封闭凸起；所述弧形垫片上开设有连接通孔，所述第二支架上设有螺纹柱，所述弧形垫片与所述第二支架之间设有连接螺钉，所述连接螺钉贯穿所述连接通孔并与所述螺纹柱螺纹连接。
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