A head-mounted flat-panel headset with a vibration-optimized flat-panel sound unit

Abstract

The present invention discloses a head-mounted flat-panel headset with a vibration-optimized flat-panel sound-emitting unit, comprising: earmuffs including an outer shell and a flat-panel sound-emitting unit mounted in the outer shell; a headband having elasticity, with two earmuffs mounted on both ends of the headband respectively; a telescopic structure having one end connected to the headband and the other end connected to the earmuffs, and the telescopic structure is capable of adjusting the relative position of the earmuffs and the headband; the flat-panel sound-emitting unit comprises a planar diaphragm and an upper shell and a lower shell arranged in parallel on two side surfaces of the planar diaphragm, a plurality of permanent magnets being provided on the lower side surface of the upper shell, and a plurality of permanent magnets being provided on the upper side surface of the lower shell; a planar coil having an "S"-shaped pattern is formed on the upper and lower side surfaces of the planar diaphragm; an upper acoustic resistance plate is fittedly mounted along each magnetic pole surface of the permanent magnet on the lower side surface of the upper shell, and a lower acoustic resistance plate is fittedly mounted along each magnetic pole surface of the permanent magnet on the upper side surface of the lower shell; and the acoustic resistance plate is made of a metal sheet with a thickness of 0.1-0.2 mm.

Description

Technical Field

[0001] The present invention relates to the field of headphones, and in particular to a head-mounted flat-panel headphone with a vibration-optimized flat-panel sound-emitting unit. Background Art

[0002] Planar sound drivers are a well-known technology in planar headphones. Traditional planar sound drivers feature multiple elongated permanent magnets, each with two opposing magnetic poles on its two sides. These magnets are arranged in parallel, with the north and south poles alternately and securely joined together by non-magnetic components. A coil with an S-shaped or yaw-shaped pattern is formed on the diaphragm surface. The diaphragm and permanent magnets are combined so that the straight portion of the coil pattern is centered between the parallel, elongated permanent magnets.

[0003] The distance between the planar diaphragm and the magnetic pole surface of the permanent magnet needs to be wider than the vibration amplitude of the planar diaphragm. Therefore, this distance between the planar diaphragm and the magnetic pole surface of the permanent magnet makes it impossible to ensure sufficient magnetic flux density required by the planar diaphragm when the planar diaphragm is electromagnetically braked, resulting in attenuation of the high-frequency range of the flat-panel sound unit.

[0004] At the same time, due to the structural characteristics of the flat-panel sound unit, it is relatively large and is more commonly used in headphones. Headphones are connected together by an elastic headband. When using headphones, the headband relies on the earmuffs to fit tightly against the human ear. Due to the special characteristics of the integrated structure of headphones, they are less adaptable to the different head shapes and ear positions of various users. They require a telescopic structure to connect the earmuffs and the headband, and use this telescopic structure to adjust the enclosure size of the entire headphone to accommodate different head shapes and ear positions.

[0005] However, the telescopic structure of existing headphones relies on human feeling to adjust the enclosure size of the entire headphone, which cannot be adjusted accurately. If the earmuff is positioned too low, it will press the upper part of the ear, and if the earmuff is positioned too high, it will press the earlobe.

[0006] Therefore, how to provide a head-mounted flat-panel headphone that can optimize the vibration characteristics of the diaphragm and accurately adjust the enclosure size has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A head-mounted flat-panel headset with a vibration-optimized flat-panel sound unit, comprising:

[0009] The earmuff comprises an outer shell and a flat sound unit installed in the outer shell;

[0010] The headband is elastic, and the two earmuffs are respectively mounted on both ends of the headband;

[0011] A telescopic structure, one end of which is connected to the headband and the other end is connected to the earmuff, and the telescopic structure can adjust the relative position of the earmuff and the headband;

[0012] The flat sound unit includes a planar diaphragm and an upper shell and a lower shell arranged in parallel on both sides of the planar diaphragm, a plurality of permanent magnets are arranged on the lower side of the upper shell, and a plurality of permanent magnets are also arranged on the upper side of the lower shell;

[0013] The upper and lower sides of the planar diaphragm are formed with a planar coil having an "S"-shaped pattern;

[0014] Among them, the upper acoustic resistance plate is installed in a close relationship with each magnetic pole surface of the permanent magnet along the lower side of the upper shell, and the lower acoustic resistance plate is installed in a close relationship with each magnetic pole surface of the permanent magnet along the upper side of the lower shell;

[0015] In addition, the sound resistance plate is made of a metal sheet with a thickness of 0.1-0.2 mm.

[0016] Furthermore, a plurality of airflow openings are arranged in a circular array on the periphery of the sound resistance plate, and the opening sizes of the airflow openings are adjustable.

[0017] Furthermore, an upper adjustment ring is fitted on the lower side of the upper sound resistance plate, and a lower adjustment ring is fitted on the upper side of the lower sound resistance plate. The adjustment ring is provided with the same number of adjustment holes as the air flow openings.

[0018] The overlapping degree between the adjustment hole and the air flow port is changed by rotating the adjustment ring.

[0019] Furthermore, a plurality of sound-generating openings are provided on the shell between adjacent permanent magnets.

[0020] Furthermore, the outer peripheral portion of the planar diaphragm is clamped between a pair of upper and lower frames, and the pair of upper and lower frames are installed between the upper shell and the lower shell;

[0021] The outer periphery of the adjustment ring can be relatively slidably embedded in the annular mounting groove inside the frame; the side end of the adjustment ring extends outward to form a paddle, which extends out from a through hole on one side of the frame.

[0022] Furthermore, a driving wheel is provided on the outer cover shell, and the driving wheel is transmission-connected to the paddle.

[0023] Furthermore, the telescopic structure includes a headband connecting portion and an earmuff connecting portion, and the upper end of the earmuff connecting portion is telescopically mounted in the headband connecting portion;

[0024] A sliding plate is installed in the headband connection portion, and the sliding plate can be manually controlled to slide up and down in the headband connection portion, and the sliding plate is in elastic contact with the earmuff connection portion;

[0025] Wherein, in the first state, the sliding plate can drive the earmuff connecting portion to move together, and in the second state, the sliding plate cannot drive the earmuff connecting portion to move together.

[0026] Furthermore, a push plate connected to the sliding plate is provided on the headband connecting part, and a limiting groove is also provided on the headband connecting part. The push plate passes through the limiting groove and is connected to the sliding plate, and the connecting part is limited by the limiting groove.

[0027] Furthermore, a plurality of leaf springs, balls and retaining members are installed on one end surface of the sliding plate;

[0028] There are multiple retaining members, which are vertically arranged on the side wall of the sliding plate;

[0029] The leaf spring is fixedly mounted on the retaining member;

[0030] The balls are in contact with the leaf spring and the hemispherical groove on the earmuff connection portion, respectively. A retaining slide is formed between two adjacent retaining members, and a ball is placed in the retaining slide. The ball cannot move vertically relative to the retaining member.

[0031] The upper end of the earmuff connecting portion is a plate-shaped structure with a certain thickness, and the side opposite to the sliding plate is a meshing structure. The hemispherical grooves are arranged vertically and continuously on the side wall of the earmuff connecting portion.

[0032] Furthermore, a slot is provided on the side of the earmuff connection portion, and a one-way deformable body is inserted into the slot;

[0033] The top of the one-way deformable body protrudes from the side of the earmuff connecting portion and contacts the inner side wall of the headband connecting portion;

[0034] When the earmuff connection portion extends into the headband connection portion, the resistance encountered by the one-way deformable body is smaller than the resistance encountered by the one-way deformable body when the earmuff connection portion extends outward from the headband connection portion.

[0035] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0036] A thin air layer is formed between the upper acoustic baffle and the planar diaphragm, and between the lower acoustic baffle and the planar diaphragm, respectively. This mechanically brakes the planar diaphragm without the need for electromagnetic braking, optimizing its vibration characteristics. Furthermore, because the acoustic baffles are thin and non-magnetic, they barely reduce the magnetic flux applied to the planar coil. Furthermore, because the air cells in the air layer are small, the cutoff frequency of the low-pass filter formed by the air cells and the acoustic resistance can be set higher, preventing attenuation in the high-frequency range.

[0037] The periphery of the sound resistance plate is provided with a plurality of airflow openings arranged in a circumferential array, and the opening sizes of the airflow openings are adjustable, so that the acoustic resistance of the air layer can be arbitrarily adjusted according to the opening sizes of the airflow openings on the sound resistance plate.

[0038] When the lower edge of the earmuff contacts the earlobe of the outer ear, the sliding plate cannot drive the earmuff connection portion upward, and the earmuff connection portion automatically stops extending and retracting, thereby achieving an automatic stop adjustment function for the telescopic structure. Therefore, when the adjustment range is exceeded, the automatic stop adjustment function of the telescopic structure not only prevents the telescopic structure from being damaged, but also prevents the lower edge of the earmuff from excessively pressing the earlobe and causing discomfort to the user, thereby improving the user experience.

[0039] The provision of a unidirectional deformable body facilitates the insertion of the earmuff connector into the headband connector, facilitating upward adjustment and making it easier to manually push the push plate upward. Furthermore, by providing a large resistance when the earmuff connector extends outward from the headband connector, the unidirectional deformable body prevents the connector from naturally extending after the earmuff is manually adjusted into position, thereby ensuring the stability of the earmuff's optimal position. Furthermore, when wearing the flat-panel headphones, the first step of pulling the earmuffs with both hands to open the headband is less likely to disrupt the previously adjusted relative position, thus saving the need for further adjustment steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is the overall structure diagram of the headset;

[0041] Figure 2 This is the overall structure diagram of the flat panel sound unit;

[0042] Figure 3 This is an exploded view of the flat panel sound unit;

[0043] Figure 4 This is a cross-sectional view of a flat panel sound unit;

[0044] Figure 5 Schematic diagram of a planar diaphragm;

[0045] Figure 6 for Figure 5 Middle AA section view;

[0046] Figure 7 for Figure 1 A partial enlarged view of the middle A;

[0047] Figure 8 This is the overall diagram of the telescopic structure;

[0048] Figure 9 This is a cross-sectional view of the telescopic structure. For ease of display, the headband connection is hidden;

[0049] Figure 10 This is the exploded view of the telescopic structure;

[0050] Figure 11 for Figure 10 A partial enlarged view of point B in the middle;

[0051] Figure 12 It is a schematic diagram of the structure of a unidirectional deformable body;

[0052] Figure 13 It is a partial cross-sectional view of the telescopic structure. DETAILED DESCRIPTION

[0053] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0054] like Figure 1 As shown, this embodiment provides a head-mounted flat-panel headset with a vibration-optimized flat-panel sound unit, including earmuffs 1, a headband 3 and a telescopic structure 4. The earmuffs 1 include an outer shell and a flat-panel sound unit 2 installed in the outer shell; the headband 3 is elastic, and the two earmuffs 1 are respectively installed at both ends of the headband 3; one end of the telescopic structure 4 is connected to the headband 3, and the other end is connected to the earmuffs 1, and the telescopic structure 4 can adjust the relative position of the earmuffs 1 and the headband 3.

[0055] It can be understood that when the head-mounted flat-panel headphones of this embodiment are used, the two earmuffs 1 are pulled with both hands to open the headband 3, and then the earmuffs 1 are covered with the ears. Under the elastic action of the headband 3, the earmuffs 1 fit the face, and finally the relative position of the earmuffs 1 and the headband 3 is adjusted through the telescopic structure 4 to adapt to the different head shapes and ear positions of various users.

[0056] In this embodiment, Figure 2-6 As shown, the flat panel sound unit 2 includes a planar diaphragm 21 and an upper shell 22-1 and a lower shell 22-2 arranged parallel to the sides of the planar diaphragm 21. It will be understood that the upper shell 22-1 and the lower shell 22-2 are plate-shaped magnetic bodies and are arranged parallel to the upper and lower sides of the planar diaphragm 21 at a predetermined distance. The upper shell 22-1 and the lower shell 22-2 have the same structure and are collectively referred to as shells 22 unless otherwise specified.

[0057] A plurality of permanent magnets 23 are respectively provided on one side of the two shells 22. Specifically, in this embodiment, six permanent magnets 23-1 are provided on the lower side of the upper shell 22-1, and six permanent magnets 23-2 are also provided on the upper side of the lower shell 22-2.

[0058] It is understandable that, combined with Figure 6Each permanent magnet 23 is a prism of the same size, and its N and S magnetization directions are perpendicular to the plate surface of the shell 22. Moreover, in the two shells 22, the magnetic poles of adjacent permanent magnets 23 are oriented in opposite directions, and the permanent magnet 23-1 on the lower side of the upper shell 22-1 and the permanent magnet 23-2 on the upper side of the lower shell 22-2 are arranged with the same poles facing each other.

[0059] That is to say, the odd-numbered permanent magnets among the six permanent magnets 23-1 arranged on the lower side of the upper shell 22-1 all have their N poles facing the upper side of the planar diaphragm 21, and in contrast, the even-numbered permanent magnets all have their S poles facing the upper side of the planar diaphragm 21.

[0060] Similarly, among the six permanent magnets 23-2 disposed on the upper side of the lower housing 22-2, the odd-numbered permanent magnets all have their north poles facing the lower side of the planar diaphragm 21. Conversely, the even-numbered permanent magnets all have their south poles facing the lower side of the planar diaphragm 21. Furthermore, the surface of each permanent magnet 23 that faces the planar diaphragm 21 is the magnetic pole surface 24.

[0061] Therefore, the first (Appendix Figure 4 、 6 (Perspective) The permanent magnets 23-1 and 23-2 (both with N poles), the second permanent magnet 23-1 and 23-2 (both with S poles), the third permanent magnet 23-1 and 23-2 (both with N poles), the fourth permanent magnet 23-1 and 23-2 (both with S poles), the fifth permanent magnet 23-1 and 23-2 (both with N poles), and the sixth permanent magnet 23-1 and 23-2 (both with S poles) are opposite to each other as the same poles.

[0062] Furthermore, multiple sound-emitting openings 221 are provided between adjacent permanent magnets 23 on the housing 22 to discharge the sound waves generated by the planar diaphragm 21. Specifically, the sound-emitting openings 221 in this embodiment are elongated slits 221. It will be appreciated that the sound-emitting openings 221 can be provided in both the upper housing 22-1 and the lower housing 22-2, or in either the upper housing 22-1 or the lower housing 22-2.

[0063] The planar diaphragm 21 is constructed from a flexible resin film, with an S-shaped planar coil 25 formed on its upper and / or lower sides. Planar coil 25-1 on the upper side and planar coil 25-2 on the lower side overlap in the same pattern, and the driving current flows in the same direction. Planar coil 25 can be a single conductor or multiple conductors arranged in parallel.

[0064] The outer periphery of the planar diaphragm 21 is clamped between a pair of upper and lower frames 26, which are mounted between the upper shell 22-1 and the lower shell 22-2. It will be appreciated that the mounting arrangement between the frames 26 and the shell 22 is configured such that the spacing between the planar diaphragm 21 and the magnetic pole faces 24 of the permanent magnets 23 complies with regulations.

[0065] In the prior art, the distance between the planar diaphragm 21 and the magnetic pole surface 24 of the permanent magnet 23 needs to be wider than the vibration amplitude of the planar diaphragm 21. Therefore, the above distance makes it impossible to ensure sufficient magnetic flux density required by the planar diaphragm 21 when electromagnetic braking is performed on the planar diaphragm 21.

[0066] In this embodiment, an upper acoustic damping plate 27-1 is mounted in close contact with each magnetic pole face 24 of the permanent magnet 23-1 on the lower side of the upper shell 22-1, and a lower acoustic damping plate 27-2 is mounted in close contact with each magnetic pole face 24 of the permanent magnet 23-2 on the upper side of the lower shell 22-2. The acoustic damping plates 27 are made of metal sheets with a thickness of 0.1-0.2 mm.

[0067] This arrangement forms a thin air layer 20 between the upper acoustic baffle plate 27-1 and the planar diaphragm 21, and between the lower acoustic baffle plate 27-2 and the planar diaphragm 21. This mechanically brakes the planar diaphragm 21 without electromagnetic braking, optimizing the vibration characteristics of the planar diaphragm 21. Furthermore, because the acoustic baffle plate 27 is thin and non-magnetic, it barely reduces the magnetic flux applied to the planar coil 25.

[0068] Furthermore, since the air chambers in the air layer 20 are relatively small, the cutoff frequency of the low-pass filter formed by the air chambers and the acoustic resistance can be set to a higher frequency, thereby preventing attenuation of high-frequency sounds. In other words, mechanical braking can be applied to the planar diaphragm 21 without attenuating high-frequency sounds.

[0069] In this embodiment, a plurality of airflow openings 271 are arranged in a circular array around the periphery of the acoustic resistance plate 27, and the opening size of the airflow openings 271 is adjustable, so that the acoustic resistance of the air layer 20 can be arbitrarily adjusted according to the opening size of the airflow openings 271 on the acoustic resistance plate 27.

[0070] Specifically, an upper adjustment ring 28-1 is snugly mounted on the lower side of the upper acoustic baffle 27-1, and a lower adjustment ring 28-1 is snugly mounted on the upper side of the lower acoustic baffle 27-2. The adjustment ring 28 is provided with the same number of adjustment holes 281 as the airflow openings 271. The outer periphery of the adjustment ring 28 is slidably inserted into the annular mounting groove 261 on the inner side of the frame 26. The side end of the adjustment ring 28 extends outward to form a paddle 282, which extends from a through hole 262 on one side of the frame 26.

[0071] With the above arrangement, the adjustment ring 28 is rotated relative to the adjustment ring 28 by turning the paddle 282, thereby adjusting the overlap between the adjustment hole 281 and the airflow opening 271, and ultimately changing the opening size of the airflow opening 271. It is understood that when the adjustment hole 281 completely overlaps the airflow opening 271, the opening size of the airflow opening 271 is maximized, and when the adjustment hole 281 completely offsets the airflow opening 271, the opening size of the airflow opening 271 is minimized.

[0072] In this embodiment, see the attached Figure 7 A driving wheel 11 is provided on the outer cover shell, and the driving wheel 11 is transmission-connected to the paddle 282 so that the adjusting ring 28 is driven to rotate by rotating the driving wheel 11 .

[0073] In this embodiment, Figure 8 As shown, the telescopic structure 4 includes a headband connecting portion 41 and an earmuff connecting portion 42 , and the upper end of the earmuff connecting portion 42 can be telescopically installed in the headband connecting portion 41 .

[0074] It can be understood that the headband 3 is installed at the upper end of the headband connecting part 41, and the earmuff 1 is installed at the lower end of the earmuff connecting part 42, and the relative position of the earmuff 1 and the headband 3 is adjusted by the extension and contraction of the earmuff connecting part 42.

[0075] In this embodiment, combined with the Figure 8-9 As shown, a sliding plate 411 is installed in the headband connecting portion 41. The sliding plate 411 can be manually controlled to slide up and down in the headband connecting portion 41. The sliding plate 411 is in elastic contact with the earmuff connecting portion 42.

[0076] In the first state, the sliding plate 411 can drive the earmuff connecting portion 42 to move together, and in the second state, the sliding plate 411 cannot drive the earmuff connecting portion 42 to move together.

[0077] It is understood that when wearing a flat headphone, one pulls the two earmuffs 1 with both hands to open the headband 3, then covers the ears with the earmuffs 1. The elasticity of the headband 3 allows the earmuffs 1 to fit the face. At this point, the earmuffs 1 are positioned relatively low, and the position of the earmuffs 1 needs to be adjusted upward using the telescopic structure 4. The traditional method involves pushing the earmuffs 1 upward with both hands, relying on manual feel to adjust the overall fit of the headphones, which cannot be adjusted precisely.

[0078] In this embodiment, the sliding plate 411 is manually controlled to slide upward. In the first state, the sliding plate 411 drives the earmuff connecting portion 42 upward, thereby driving the earmuff 1 upward to cover the outer ear. In the second state, when the lower edge of the earmuff 1 contacts the earlobe of the outer ear, the sliding plate 411 is unable to drive the earmuff connecting portion 42 upward, and the earmuff connecting portion 42 automatically stops its telescopic movement. In other words, although the sliding plate 411 continues to slide upward, the pressure exerted by the lower edge of the earmuff 1 on the earlobe no longer changes, thereby achieving the automatic stop adjustment function of the telescopic structure 4.

[0079] Therefore, when the adjustment range is exceeded (the lower edge of the earmuff 1 contacts the earlobe), the automatic stop adjustment function of the telescopic structure 4 not only makes the telescopic structure 4 less likely to be damaged, but also prevents the lower edge of the earmuff 1 from excessively squeezing the earlobe, causing discomfort to the user, thereby improving the user experience.

[0080] In this embodiment, the headband connection portion 41 is provided with a push plate 43 connected to the sliding plate 411. Manually pushing the push plate 43 upward causes the sliding plate 411 to slide. Alternatively, the headband connection portion 41 is further provided with a limiting slot 44. The push plate 43 extends through the limiting slot 44 and connects to the sliding plate 411. The connection portion is limited by the limiting slot 44.

[0081] In this embodiment, a leaf spring 412, a ball 413 and a retaining member 414 are installed on one side end face of the sliding plate 411. The sliding plate 411 is a plate-like structure with a certain thickness. The retaining member 414 is fixedly arranged on the side wall of the sliding plate 411. The retaining member 414 can fix the ball 413 in the vertical direction. There are multiple retaining members 414, and they are arranged vertically on the side wall of the sliding plate 411.

[0082] Specifically, a gap of a certain size exists between two adjacent retaining members 414 to form a retaining slideway, and a ball 413 is placed in the retaining slideway, wherein the ball 413 cannot move in a vertical direction relative to the retaining member 414 .

[0083] The leaf spring 412 is fixedly mounted on the retaining member 414. In another embodiment, the leaf spring 412 can be fixed by placing it in a groove of the sliding plate 411. In this case, the retaining member 414 is not required, and the leaf spring 412 can also be replaced with a coil spring. It is understood that the fixing method of the leaf spring 412 only needs to ensure that the leaf spring 412 cannot move relative to the sliding plate 411.

[0084] The ball bearing 413 contacts the leaf spring 412 and the earmuff connecting portion 42 . The ball bearing 413 is a component for connecting the sliding plate 411 and the earmuff connecting portion 42 .

[0085] Specifically, the contact manner between the ball 413 and the leaf spring 412 is direct contact between their surfaces, and the ball 413 contacts the hemispherical groove 421 of the earmuff connecting portion 42 .

[0086] The upper end of the earmuff connecting portion 42 is a plate-shaped structure with a certain thickness, and the side opposite to the sliding plate 411 is an engaging structure. The hemispherical grooves 421 are vertically and continuously arranged on the side wall of the earmuff connecting portion 42.

[0087] Through the above arrangement, in the first state, the ball 413 is in an extended state under the action of the leaf spring 412, the ball 413 is in contact with the hemispherical groove 421, and the sliding plate 411 drives the earmuff connecting part 42 to move upward through the ball 413; in the second state, the ball 413 and the hemispherical groove 421 are squeezed against each other. Under the action of the squeezing of the two, the leaf spring 412 pushed by the ball 413 is elastically deformed, and the ball 413 continuously enters the adjacent hemispherical groove 421 from one hemispherical groove 421. The sliding plate 411 cannot drive the earmuff connecting part 42 to move upward through the ball 413, thereby realizing the automatic stop adjustment function of the telescopic structure 4 and preventing the lower edge of the earmuff 1 from excessively squeezing the earlobe.

[0088] In this embodiment, Figure 10-11 As shown in Figures 13 and 14, a slot 422 is provided on the side of the earmuff connection portion 42, into which a one-way deformable body 45 is inserted. The top of the one-way deformable body 45 protrudes from the side of the earmuff connection portion 42 and contacts the inner wall of the headband connection portion 41. When the earmuff connection portion 42 extends into the headband connection portion 41, the resistance encountered by the one-way deformable body 45 is much smaller than when the earmuff connection portion 42 extends outward from the headband connection portion 41.

[0089] It is understandable that when wearing the flat-panel headphones, the two earmuffs 1 are pulled by both hands to open the headband 3, which will cause the earmuffs 1 to move away from the headband connection part 41. After the earmuffs 1 cover the ears, it is often necessary to adjust the relative position of the earmuffs 1 and the headband 3 through the telescopic structure 4, so that the earmuffs 1 move upward to adjust to the optimal position.

[0090] In this embodiment, when the earmuff connection part 42 is extended into the headband connection part 41, the one-way deformable body 45 encounters less resistance, which facilitates the earmuff connection part 42 to extend into the headband connection part 41, facilitates upward adjustment, and makes it easy to manually push the push plate 43 upward.

[0091] Furthermore, by providing greater resistance to the unidirectional deformable body 45 when the earmuff connection portion 42 extends outward from the headband connection portion 41, the earmuff connection portion 42 is less likely to naturally extend after the earmuff 1 is manually adjusted into position, thereby ensuring the stability of the optimal position of the earmuff 1. Furthermore, when wearing the flat-panel headset, the first step of pulling the two earmuffs 1 with both hands to open the headband 3 is less likely to disrupt the previously adjusted relative position, thus saving the next adjustment step.

[0092] In this embodiment, see the attached Figure 12 As shown, the one-way deformation body 45 includes a mounting base 451, which is embedded in the slot 422. A lower deformation portion 452 is provided on the mounting base 451, and the lower side surface of the lower deformation portion 452 is an arc surface, and the upper side surface is a plane.

[0093] The mounting base 451 is further provided with an upper deformable portion 453 located above the lower deformable portion 452. The lower side surface of the upper deformable portion 453 is a flat surface, and the upper side surface is an arc surface. The upper side surface of the lower deformable portion 452 is opposite to the lower side surface of the upper deformable portion 453.

[0094] In this embodiment, the lower deformation portion 452 and the upper deformation portion 453 are both made of elastic rubber, and a torsion spring 454 is vulcanized inside the lower deformation portion 452;

[0095] Among them, the first extension end 455 of the torsion spring 454 is parallel to the installation surface of the installation base 451, and the second extension end 456 of the torsion spring 454 is parallel to the upper side surface of the lower deformation portion 452. The first extension end 455 and the second extension end 456 of the torsion spring 454 have potential energy to approach each other.

[0096] Through the above arrangement, when the earmuff connection part 42 extends into the headband connection part 41, the upper deformation part 453 is deformed downwardly and tilted, and the lower deformation part 452 is also deformed downwardly. Since the first extension end 455 and the second extension end 456 have potential energy approaching each other, the lower deformation part 452 is easy to deform downward, and the inner side wall of the headband connection part 41 is basically only subjected to the friction force of the unidirectional deformation body 45, and the earmuff connection part 42 is easier to extend into the headband connection part 41.

[0097] When the earmuff connection portion 42 extends outward from the headband connection portion 41, the upper deformation portion 453 is deformed and tilted upward, and the lower deformation portion 452 is also deformed and tilted upward. Since the first extension end 455 and the second extension end 456 have potential energy approaching each other, the lower deformation portion 452 is relatively difficult to deform upward. The lower deformation portion 452 still maintains a tendency to protrude from the side of the earmuff connection portion 42. The inner side wall of the headband connection portion 41 is subjected to the extrusion pressure of the unidirectional deformation body 45, and the earmuff connection portion 42 is difficult to extend outward from the headband connection portion 41.

[0098] In this embodiment, a gap 457 is provided between the upper side surface of the lower deformation portion 452 and the lower side surface of the upper deformation portion 453 to facilitate deformation and tilting of the lower deformation portion 452 and the upper deformation portion 453 .

[0099] The foregoing is an example of the best mode of carrying out the present invention. Any portion not described in detail herein is common knowledge within the skill of one of ordinary skill in the art. The scope of protection of the present invention is determined by the claims. Any equivalent transformation based on the technical teachings of the present invention is also within the scope of protection of the present invention.

Claims

1. A head-mounted flat-panel headset with a vibration-optimized flat-panel sound unit, comprising: The earmuff comprises an outer shell and a flat sound unit installed in the outer shell; The headband is elastic, and the two earmuffs are respectively mounted on both ends of the headband; A telescopic structure, one end of which is connected to the headband and the other end is connected to the earmuff, and the telescopic structure can adjust the relative position of the earmuff and the headband; The characteristic is that the flat sound unit includes a planar diaphragm and an upper shell and a lower shell arranged in parallel on both sides of the planar diaphragm, a plurality of permanent magnets are arranged on the lower side of the upper shell, and a plurality of permanent magnets are also arranged on the upper side of the lower shell; The upper and lower sides of the planar diaphragm are formed with a planar coil having an "S"-shaped pattern; Among them, the upper acoustic resistance plate is installed in a close relationship with each magnetic pole surface of the permanent magnet along the lower side of the upper shell, and the lower acoustic resistance plate is installed in a close relationship with each magnetic pole surface of the permanent magnet along the upper side of the lower shell; Moreover, the acoustic resistance plate is made of a metal sheet with a thickness of 0.1-0.2 mm; The telescopic structure includes a headband connecting portion and an earmuff connecting portion, wherein the upper end of the earmuff connecting portion is telescopically mounted in the headband connecting portion; A sliding plate is installed in the headband connection portion, and the sliding plate can be manually controlled to slide up and down in the headband connection portion, and the sliding plate is in elastic contact with the earmuff connection portion; Wherein, in the first state, the sliding plate can drive the earmuff connecting portion to move together, and in the second state, the sliding plate cannot drive the earmuff connecting portion to move together; One end surface of the sliding plate is equipped with a plurality of leaf springs, balls and retaining members; There are multiple retaining members, which are vertically arranged on the side wall of the sliding plate; The leaf spring is fixedly mounted on the retaining member; The balls are in contact with the leaf spring and the hemispherical groove on the earmuff connection portion, respectively. A retaining slide is formed between two adjacent retaining members, and a ball is placed in the retaining slide. The ball cannot move vertically relative to the retaining member. The upper end of the earmuff connecting portion is a plate-shaped structure with a certain thickness, and the side opposite to the sliding plate is a meshing structure, and the hemispherical grooves are vertically and continuously arranged on the side wall of the earmuff connecting portion; A slot is provided on the side of the earmuff connection portion, and a one-way deformable body is inserted into the slot; The top of the one-way deformable body protrudes from the side of the earmuff connecting portion and contacts the inner side wall of the headband connecting portion; When the earmuff connection portion extends into the headband connection portion, the resistance experienced by the one-way deformable body is smaller than the resistance experienced by the one-way deformable body when the earmuff connection portion extends outward from the headband connection portion. The one-way deformable body includes a mounting base plate, the mounting base plate is embedded in the slot, and a lower deformable portion is provided on the mounting base plate, the lower side surface of the lower deformable portion is an arc surface, and the upper side surface is a plane; The mounting base is further provided with an upper deformation portion located above the lower deformation portion, the lower side surface of the upper deformation portion is a plane, the upper side surface is an arc surface, and the upper side surface of the lower deformation portion is opposite to the lower side surface of the upper deformation portion; The lower deformation part and the upper deformation part are both made of elastic rubber, and a torsion spring is formed by vulcanization in the lower deformation part; The first extending end of the torsion spring is parallel to the mounting surface of the mounting base, the second extending end of the torsion spring is parallel to the upper side surface of the lower deformation portion, and the first extending end and the second extending end of the torsion spring have potential energy to approach each other.

2. The flat headphone according to claim 1, wherein: A plurality of air flow openings are arranged in a circular array on the periphery of the sound resistance plate, and the opening sizes of the air flow openings are adjustable.

3. The flat headphone according to claim 2, wherein: An upper adjustment ring is fitted on the lower side of the upper sound resistance plate, and a lower adjustment ring is fitted on the side of the lower sound resistance plate. The adjustment ring is provided with the same number of adjustment holes as the air flow openings. The overlapping degree between the adjustment hole and the air flow port is changed by rotating the adjustment ring.

4. The flat headphone according to claim 1, wherein: A plurality of sound-generating openings are provided on the shell between adjacent permanent magnets.

5. The flat headphone according to claim 3, wherein: The outer peripheral edge of the planar diaphragm is clamped between a pair of upper and lower frames, and the pair of upper and lower frames are installed between the upper shell and the lower shell; The outer periphery of the adjustment ring can be relatively slidably embedded in the annular mounting groove inside the frame; the side end of the adjustment ring extends outward to form a paddle, which extends out from a through hole on one side of the frame.

6. The flat headphone according to claim 5, wherein: A driving wheel is provided on the outer cover shell, and the driving wheel is transmission-connected with the paddle.

7. The flat headphone according to claim 1, wherein: The headband connecting part is provided with a push plate connected to the sliding plate. A limiting groove is also provided on the headband connecting part. The push plate passes through the limiting groove and is connected to the sliding plate, and the connecting part is limited by the limiting groove.

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