CN223124983U - earphone - Google Patents

Abstract

The present application discloses an earphone, which includes a movement housing, a speaker assembly and a key assembly arranged in the movement housing, wherein the speaker assembly includes a main speaker and a sound cavity bracket, the sound cavity bracket cooperates with the main speaker to form an acoustic back cavity, the key assembly is supported on the sound cavity bracket, and a key portion for pressing and triggering the key assembly is arranged on the movement housing. In the above manner, the present application can save space inside the earphone, reduce the size of the earphone, and improve space utilization.

Description

Earphone

Technical Field

The application relates to the technical field of electronic equipment, in particular to an earphone.

Background

With the continuous popularization of electronic devices, the electronic devices have become indispensable social and entertainment tools in daily life, and the requirements of people on the electronic devices are also increasing. Electronic devices such as headphones and intelligent glasses are widely applied to daily life of people, and can be matched with terminal devices such as mobile phones and computers to provide audible feast for users.

Conventional headphones are typically provided with keys for the user to press and control the headphones, but the size of the headphones is large due to the arrangement of the keys and the structure associated with the keys.

Disclosure of utility model

In order to solve the technical problem, the application adopts a technical scheme that the earphone comprises a machine core shell, a loudspeaker assembly and a key assembly, wherein the loudspeaker assembly and the key assembly are arranged in the machine core shell, the loudspeaker assembly comprises a main loudspeaker and a sound cavity bracket, the sound cavity bracket and the main loudspeaker are matched to form an acoustic rear cavity, the key assembly is supported on the sound cavity bracket, and a key part for pressing and triggering the key assembly is arranged on the machine core shell.

In some embodiments, the earphone further comprises a main control circuit board, the main control circuit board is arranged in a lamination manner with the speaker assembly along the vibration direction of the main speaker, the main surface of the main control circuit board is arranged to face or deviate from the speaker assembly, the sound cavity bracket is arranged around the main speaker, and the key assembly is supported on the peripheral surface of the sound cavity bracket and is electrically connected to the main control circuit board.

In some embodiments, the key assembly comprises a support plate and a key body arranged on one side of the support plate, which is away from the sound cavity bracket, the key body is fixedly connected with the support plate, the support plate is fixedly supported on the outer peripheral surface of the sound cavity bracket, and an included angle formed by the main surface of the support plate, which is away from the sound cavity bracket, and the axial direction of the sound cavity bracket is 0-10 degrees.

In some embodiments, the main surface of the support plate facing away from the sound cavity bracket is perpendicular to the main surface of the main control circuit board facing towards or facing away from the speaker assembly, or an included angle between the main surface of the support plate and the main surface of the main control circuit board is 80 ° to 90 °.

In some embodiments, the outer peripheral surface of the sound cavity support is provided with a supporting surface, one side of the supporting plate, facing the sound cavity support, of the supporting plate is supported on the supporting surface, and the sound cavity support is further provided with a limiting mechanism for limiting the supporting plate.

In some embodiments, the limiting mechanism includes a first limiting portion disposed on a side of the supporting surface away from the main control circuit board, where the first limiting portion is configured to limit the supporting plate in a first direction, and the first direction is a direction parallel to the supporting surface and away from the main control circuit board.

In some embodiments, a pressing block is disposed on the main control circuit board and between the support plates, and the pressing block is used for elastically abutting against a first edge of the support plate facing to one side of the main control circuit board, so that a second edge of the support plate far away from one side of the main control circuit board is supported on the first limiting portion.

In some embodiments, the limiting mechanism further includes a second limiting portion disposed on the periphery of the supporting surface along a second direction, the second direction being parallel to the supporting surface and perpendicular to the first direction, and the second limiting portion being configured to limit the supporting plate in the second direction.

In some embodiments, the number of the second limiting parts is two, which are arranged at intervals along the second direction, and the supporting plate is located between the two second limiting parts. Or the supporting plate comprises a main body part and a hook-shaped part connected with the main body part, the main body part is supported on the supporting surface, and the hook-shaped part is hung on one side of the second limiting part, which is away from the supporting surface.

In some embodiments, the limiting mechanism comprises a third limiting part arranged at intervals along the vertical direction of the supporting surface and the supporting surface, the third limiting part is positioned on one side of the supporting surface supporting the supporting plate, and the third limiting part is used for limiting the supporting plate in the vertical direction of the supporting surface.

In some embodiments, a key hole is formed in the core shell, the key part comprises a cantilever beam, a key cap and a soft filling body, the cantilever beam, the soft filling body and the key cap are arranged in the key hole, the cantilever beam and the core shell are integrally formed, one end of the cantilever beam is connected with the hole edge of the key hole, the key cap is arranged at the other end of the cantilever beam, and the soft filling body is used for filling gaps between the cantilever beam, the key cap and the hole edge of the key hole.

In some embodiments, the earphone further comprises an ear hook, the core housing has a connection end connected to the ear hook and a free end far away from the connection end, in a wearing state, the ear hook is disposed between an auricle and a head of a user, the core housing is located at a front side of the auricle, the free end at least partially covers or extends into a concha cavity, the core housing has a length direction, a thickness direction and a width direction which are orthogonal to each other, the length direction is a spacing direction of the connection end and the free end, the thickness direction is a direction facing or departing from the auricle in the wearing state, the core housing includes a first side wall and a second side wall which are disposed along the width direction, and the key portion is disposed on the first side wall or the second side wall.

In some embodiments, the earphone further comprises an ear hook and a magnet assembly, the movement housing has a connection end connected with the ear hook and a free end far away from the connection end, the polarization direction of the magnet assembly is the same as the polarization direction of the main magnet of the main speaker, the speaker assembly further comprises an auxiliary speaker, the magnet assembly and the auxiliary speaker are arranged on one side of the main speaker, which is close to the auricle of the user, in the wearing state along the vibration direction of the main speaker, the magnet assembly and the auxiliary speaker are at least partially overlapped when being observed along the length direction of the movement housing, and the length direction is the interval direction of the connection end and the free end.

In some embodiments, a ratio between a projection area of the magnet assembly along a thickness direction of the cartridge case and a projection area of the main magnet of the main speaker along the thickness direction is 0.1-0.2, and the thickness direction of the cartridge case is a direction of the cartridge case facing or away from an auricle of a user in a wearing state, and the thickness direction and the length direction are orthogonal to each other.

In some embodiments, the vibration direction and the length direction of the main speaker define a symmetry plane, and the magnet assembly includes two magnets positioned on both sides of the symmetry plane and symmetrically disposed with respect to the symmetry plane.

The earphone has the beneficial effects that the main loudspeaker, the sound cavity bracket and the key assembly are arranged, the sound cavity bracket can be matched with the main loudspeaker to form the acoustic rear cavity, so that the pickup effect of the main loudspeaker can be ensured, and meanwhile, the key assembly can be supported by the sound cavity bracket, so that the function multiplexing of the sound cavity bracket can be realized, and the key assembly is supported and fixed without additionally arranging a supporting assembly, so that the space inside the earphone can be saved, the size of the earphone is reduced, and the space utilization rate is improved.

Drawings

FIG. 1 is a schematic front side elevational view of a user's ear in accordance with the present application;

FIG. 2 is a schematic side-to-side three-dimensional structure of an embodiment of the headset according to the present application;

FIG. 3 is a schematic illustration of the earphone embodiment of FIG. 2 in a worn state;

FIG. 4 is a schematic diagram of an exploded view of the sound emitting portion of the earphone embodiment shown in FIG. 2;

FIG. 5 is another exploded view of the sound emitting portion of the earphone embodiment of FIG. 2;

FIG. 6 is a schematic cross-sectional view of the earphone embodiment of FIG. 2 taken along section line A-A;

fig. 7 is an enlarged schematic view of a partial region I of the sound emitting portion shown in fig. 4;

Fig. 8 is an enlarged schematic view of a partial region J of the sound emitting portion shown in fig. 6;

FIG. 9 is a schematic diagram of yet another exploded view of the sound emitting portion of the earphone embodiment of FIG. 2;

FIG. 10 is a schematic view of the sound emitting portion of FIG. 9 from another perspective;

fig. 11 is a schematic structural view of a further view of a part of the assembly of the sounding part shown in fig. 9.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

The following is an exemplary description of an earpiece embodiment for an earpiece.

Referring to fig. 1, an ear 100 of a user may include physiological sites such as an external auditory meatus 101, an concha cavity 102, and an auricle 103. Wherein, although the external auditory canal 101 has a certain depth and extends to the tympanic membrane of the ear 100, for convenience of description, the external auditory canal 101 refers specifically to its entrance (i.e., earhole) away from the tympanic membrane without specific explanation of the present application. The concha chamber 102 has a certain volume and depth, and the concha chamber 102 is in direct communication with the external auditory meatus 101, i.e., the earhole is simply considered to be located at the bottom of the concha chamber 102.

The headset 1 is an audio transducer capable of receiving an electrical signal from a media player or receiver and converting the electrical signal into sound waves that can be heard by the user. In some embodiments, the headset 1 may be an open headset, such as an ear-hanging headset, a rear-hanging headset, or an ear-clip headset, etc.

As shown in fig. 2 or 3, the headset 1 may be an ear-hook headset, and in some embodiments, at least part of the headset 1 may be inserted into the concha cavity 102 of a user (user) in a wearing state, so as to improve wearing stability. In some embodiments, the sound emitting portion of the headset 1 may at least partially cover a pinna of the user's ear, such as an antitragus, concha, or triangular fossa (not shown), but not occlude the external auditory canal 101 of the user's ear or otherwise visually occlude the external auditory canal 101 of the user's ear. In some embodiments, the sound emitting portion 20 of the earphone 1 may also fit or abut against the face area in front of the ear of the user, and the side of the sound emitting portion 20 that is used to emit sound is directed towards the ear of the user or towards the external auditory canal 101 of the user.

Further, individual differences may exist for different users, resulting in different shapes, sizes, etc. of the ear 100. For ease of description, and to reduce (or even eliminate) individual differences among different users, a simulator having a HEAD and its (left and right) ears 100, such as GRAS 45BC KEMAR, HEAD diagnostics, B & K4128 series, or B & K5128 series, may be manufactured based on ANSI:S3.36, S3.25, and IEC:60318-7 standards, thereby presenting a scenario in which most users wear the headset 1. Taking GRAS KEMAR as an example, the simulator of the ear 100 may be any of GRAS 45AC, GRAS 45BC, GRAS 45CC, GRAS 43AG, etc., and taking HEAD statistics as an example, the simulator of the ear 100 may be any of HMS II.3, HMS II.3LN HEC, etc. Accordingly, in the present application, descriptions such as "the user wears the headset 1", "the headset 1 is in a worn state", and "in a worn state" may refer to the headset 1 of the present application being worn on the ear 100 of the aforementioned simulator. Of course, because of individual differences among different users, the headset 1 may be worn by different users with a certain difference from the ear 100 of the headset 1 worn by the simulator, but such a difference should be tolerated.

As an example, in connection with fig. 2 and 3, the headset 1 may include an ear hook 10 and a sound emitting part 20 connected to each other. In the worn state, the ear hook 10 may be hung between the auricle 103 and the head of the user, i.e., at least part of the ear hook 10 of the headset 1 may be located at the rear side of the ear 100, so that the headset 1 is hung on the ear 100, and the sounding part 20 may be located at the front side of the auricle 103.

The sound emitting portion 20 may be a sound playing device, and the sound emitting portion 20 may be used to convert an electrical signal into an acoustic signal (which may also be referred to as "sound waves" or "sound signals") and transmit to the ear 100 of the wearer.

In some embodiments, a battery and/or circuit board or the like may be disposed within the earhook 10. Of course, the ear hook 10 may be provided with no device such as a battery and/or a circuit board, and the device such as a battery and/or a circuit board may be mounted on the sound emitting unit 20.

As an example, in the headset 1, the ear hook 10 may be replaced by other structures that may be worn on the head of a user, such as a ribbon, band, loop, hat, bracket, or U-shaped structure, etc., to enable the wearing of the sound emitting portion 20. Of course, in some embodiments, the earhook 10 may be omitted.

In some embodiments, as shown in fig. 2-5, headset 1 may include a deck housing 30, a speaker assembly 40, and a key assembly 50. The speaker assembly 40 and the key assembly 50 are disposed within the deck housing 30. The speaker assembly 40 and the key assembly 50 can be mounted in the movement housing 30 in a matching manner, so that the space inside the movement housing 30 is saved, the size of the movement housing 30 is reduced, and the space utilization rate is improved.

As an example, the deck housing 30, the speaker assembly 40, and the key assembly 50 may be provided to the sound emitting portion 20. The speaker assembly 40 is a component that can convert an electrical signal into a corresponding sound signal, so that the sound emitting part 20 has a function of sound playing. In this embodiment, the speaker assembly 40 may include a bone conduction speaker and an air conduction speaker. In other embodiments, speaker assembly 40 may also be configured as one of an air conduction speaker and a bone conduction speaker.

In some embodiments, as shown in fig. 4 and 6, the speaker assembly 40 may include a main speaker 410 and a sound cavity bracket 420, and the sound cavity bracket 420 may cooperate with the main speaker 410 to form an acoustic rear cavity 401, and the key assembly 50 is supported on the sound cavity bracket 420. By the arrangement, the acoustic cavity bracket 420 can be matched with the main loudspeaker 410 to form the acoustic rear cavity 401, and the fixed key assembly 50 can be supported, so that the function multiplexing is realized. And the support component is not needed to be additionally arranged in the movement shell 30 to support the fixed key component 50, so that the space in the earphone 1 can be saved, the size of the earphone 1 is reduced, and the space utilization rate is improved.

In some embodiments, a key portion 310 for pressing the trigger key assembly 50 is provided on the deck housing 30. The key part 310 may be disposed corresponding to the key assembly 50.

As an example, key portion 310 may be disposed on cartridge housing 30, and a portion of key portion 310 may be exposed to an outer surface of cartridge housing 30 for being pressed by a user to activate key assembly 50.

In some embodiments, the key assembly 50 can be connected with other structures in the headset 1. Specifically, after the key portion 310 triggers the key assembly 50, the key assembly 50 may generate a corresponding control signal, and the earphone 1 may perform a corresponding action in response to the control signal. In some embodiments, the control signal generated by the key assembly 50 may be a switch signal, a volume control signal, or a signal for switching songs, etc. to control the speaker assembly 40, so that the headset 1 may perform functions of turning on or off, volume adjustment, or switching songs, etc.

In some embodiments, the primary speaker 410 may be an air conduction speaker. As shown in fig. 6, the main speaker 410 may include a diaphragm 411 and a driving mechanism 412, where the driving mechanism 412 may be connected to the diaphragm 411, the driving mechanism 412, the sound cavity bracket 420, and the cartridge case 30 may form an acoustic rear cavity 401 together, and the diaphragm 411 and the cartridge case 30 may form an acoustic front cavity 402 together. That is, the acoustic rear cavity 401 and the acoustic front cavity 402 are located on opposite sides of the diaphragm 411.

In some embodiments, the driving mechanism 412 may include a coil 4121 and a magnetic circuit 4122, where the magnetic circuit 4122 is connected to the diaphragm 411, and the diaphragm 411, the magnetic circuit 4122, the sound cavity bracket 420, and the deck housing 30 may together form the acoustic rear cavity 401. The coil 4121 and the magnetic circuit 4122 may be used to generate electromagnetic induction under the control of an electrical signal, so as to drive the diaphragm 411 to vibrate, so that the air in the acoustic front cavity 402 in the main speaker 410 vibrates to generate sound waves, and the sound waves are transmitted out of the earphone 1.

As shown in fig. 4 and 5, the deck housing 30 may further be provided with an acoustic vent 320 and a pressure relief hole 330. The acoustic vent 320 may be in communication with the acoustic front cavity 402 and the pressure relief vent 330 may be in communication with the acoustic rear cavity 401. The sound wave generated at the front side of the diaphragm 411 is transmitted to the outside through the sound outlet 320, and the air in the acoustic rear cavity 401 can be effectively transmitted to the outside through the pressure release hole 330, so that the pressure accumulation in the acoustic rear cavity 401 can be prevented as much as possible, and the sound quality effect of the main speaker 410 is affected.

In some embodiments, as shown in fig. 2 and 3, the cartridge housing 30 may have a connection end 340 that connects with the earhook 10 and a free end 350 that is distal from the connection end 340. As an example, in the worn state, the ear hook 10 may be hung between the auricle 103 and the head of the user, the cartridge housing 30 may be located on the front side of the auricle 103, and the free end 350 may at least partially cover or extend into the concha chamber 102.

In some embodiments, cartridge housing 30 may have a length direction, a thickness direction, and a width direction that are orthogonal to one another.

In some embodiments, the length direction may be the direction of the separation of the connecting ends 340 and the free ends 350. The direction of the connection 340 and the free end 350 refers to the direction of the line segment connecting the connection 340 and the free end 350. In some embodiments, the connection end 340 and the free end 350 may be irregularly or regularly arc-shaped, and the extending direction of the connection line between the connection end 340 and the free end 350 may refer to a direction defined by a straight line perpendicular to a parallel tangential plane of two reference points of the connection end 340 and the free end 350 which are farthest from each other. The longitudinal direction may also be defined as the direction in which cartridge case 30 approaches or moves away from the rear of the head brain in the worn state. In other words, the length direction may be the direction indicated by arrow X in fig. 2 and 3.

In some embodiments, the width direction may be defined as the direction in which cartridge housing 30 approaches or moves away from the top of the head in the worn state. The width direction may be as indicated by arrow Y in fig. 2 and 3.

In some embodiments, the thickness direction of cartridge housing 30 is a direction toward or away from auricle 103 in the worn state. The thickness direction may be as indicated by arrow Z in fig. 2 and 3. In some embodiments, the thickness direction Z may be substantially parallel to the vibration direction of the main speaker 410, meaning that the two directions are spatially separated by less than 5 degrees.

In some embodiments, as shown in fig. 2 and 3, the deck housing 30 may include a first side wall 360 and a second side wall 370 disposed along the width direction Y, and the key part 310 may be disposed on the first side wall 360 or the second side wall 370. The key part 310 is used for being pressed by a user to trigger the key assembly 50. If the key portion 310 is disposed on one side away from the auricle 103 or on an edge of the movement housing 30, the user can move the movement housing 30 when pressing the key portion 310, so that the key portion 310 on the movement housing 30 is not easily triggered by force, and the wearing stability and comfort of the headset 1 are affected. The key portion 310 is disposed on the first side wall 360 or the second side wall 370, so that a user can press the first side wall 360 and the second side wall 370 simultaneously by using two fingers, one finger triggers the key portion 310, and the other finger supports on the opposite side wall, thereby facilitating successful pressing of the key portion 310, ensuring that the earphone 1 does not shake in a wearing state, and improving the use experience of the user.

In other embodiments, the number of the key parts 310 may be plural, and the number of the key assemblies 50 may be plural, and may be matched with the key parts 310 in a one-to-one correspondence. For example, the number of the key parts 310 may be 2, and two key parts 310 may be disposed on the first sidewall 360 and the second sidewall 370, respectively, and the number of the key assemblies 50 is also two and is matched with the two key parts 310 in a one-to-one correspondence manner.

In some embodiments, as shown in fig. 4 to 7, the headset 1 may further include a main control circuit board 60 disposed within the deck housing 30, the main control circuit board 60 may be disposed to be layered with the speaker assembly 40 in the vibration direction of the main speaker 410, and a main surface of the main control circuit board 60 may be disposed toward or away from the speaker assembly 40. A sound cavity bracket 420 may be disposed around the main speaker 410. The key assembly 50 may be supported on the outer circumferential surface of the sound cavity bracket 420 and electrically connected to the main control circuit board 60.

The main control circuit board 60 refers to a control core part inside the earphone 1, and the main control circuit board 60 may be a PCB (Printed Circuit Board) circuit board or a FPC (Flexible Printed Circuit board) circuit board. The main surface of the main control circuit board 60 refers to a working surface that can be used for disposing chips, connection wires, and the like.

In some embodiments, the key assembly 50 may be electrically connected to circuitry disposed on a major surface of the main control circuit board 60 by wires. In other embodiments, the key assembly 50 may be electrically connected to the main control circuit board 60 by an electrical connection such as a flexible circuit board or an auxiliary PCB circuit board.

In some embodiments, the main surface of the main control circuit board 60 and the axis of the main speaker 410 may be perpendicular or substantially perpendicular, where substantially perpendicular means that the spatial angle between the two directions is 75 ° to 105 °.

In some embodiments, the vibration direction of the main speaker 410 may be an axial direction of the main speaker 410, and the main control circuit board 60 may be stacked with the main speaker 410 along the axial direction of the main speaker 410. And the sound cavity supporter 420 may be disposed around the main speaker 410 along a radial direction of the main speaker 410, so that the sound cavity supporter 420 and the main control circuit board 60 may be also disposed at intervals along an axial direction of the main speaker 410.

In some embodiments, as shown in fig. 6, the vibration direction of the main speaker 410 may be the thickness direction Z of the deck housing 30, that is, the sound cavity supporter 420 and the main control circuit board 60 are laminated in the thickness direction Z of the earphone 1 and are spaced apart from each other to form the spacing space 11. Because the current generated on the main control circuit board 60 will affect the main speaker 410 mutually, and thus the sound quality effect of the main speaker 410 will be poor, the space 11 exists between the sound cavity bracket 420 and the main control circuit board 60 in the thickness direction Z of the earphone 1, so that the influence of the current on the main control circuit board 60 on the main speaker 410 can be reduced, and the bottom noise of the main speaker 410 is reduced, so as to ensure the sound quality effect of the main speaker 410.

In some embodiments, as shown in fig. 6 to 8, the key assembly 50 may be disposed on the outer peripheral surface of the sound cavity bracket 420 and may partially extend into the space 11 along the thickness direction Z, so that a portion of the key assembly 50 may overlap the space 11 in a direction perpendicular to the thickness direction Z, and another portion of the key assembly 50 may overlap the sound cavity bracket 420, so that an additional installation space for the key assembly 50 in the thickness direction Z is not required, in other words, the installation space of the key assembly 50 may multiplex the space 11, thereby reducing the size of the cartridge case 30 in the thickness direction Z and improving the space utilization inside the cartridge case 30.

In some embodiments, the axis of the sound cavity support 420 may be parallel or substantially parallel to the axis of the main speaker 410, where substantially parallel means that the spatial angle between the two directions is between 0 ° and 5 °. By the arrangement, the structure of the sound cavity bracket 420, the main speaker 410 and the main control circuit board 60 can be more compact, and the space utilization rate of the movement housing 30 is further improved.

In some embodiments, as shown in fig. 5, 7 and 8, the key assembly 50 may include a support plate 510 and a key body 520, where the key body 520 is disposed on a side of the support plate 510 facing away from the sound cavity bracket 420. The key body 520 may be fixedly connected with the support plate 510, the support plate 510 may be supported on the outer peripheral surface of the sound cavity support 420, and an included angle formed by a main surface of the support plate 510 facing away from the sound cavity support 420 and an axial direction of the sound cavity support 420 is between 0 ° and 10 °.

The main surface of the support plate 510 refers to a surface of the support plate 510 on which the key body 520 is disposed. In some embodiments, the support plate 510 may be flat plate-like, with the major surface of the support plate 510 being the side with the largest area. In some embodiments, support plate 510 may be a support structure having a stepped surface with at least a portion of the major surface being planar. In some embodiments, the support plate 510 may be an overall arc-shaped support structure, and the main surface is planar, and the support plate 510 extends in a direction of the plane where the main surface of the support plate 510 is located. By the arrangement, the structure of the supporting plate 510 is more suitable for the shape of the sound cavity bracket 420, and the space utilization rate of the cartridge case 30 is increased.

The axial direction of the sound chamber support 420 may be as shown by arrow B in fig. 6 and 8, and the plane in which the support plate 510 faces away from the main surface of the sound chamber support 420 may be as shown by plane SE in fig. 8. The angle formed by the main surface of the support plate 510 facing away from the sound cavity support 420 and the axial direction of the sound cavity support 420 may be shown as an angle alpha in 8, where alpha is 0 deg. or more and 10 deg..

If the included angle formed by the main surface of the support plate 510 facing away from the sound cavity bracket 420 and the axial direction of the sound cavity bracket 420 is greater than 10 °, the support plate 510 is inclined to a greater extent than the axial direction of the sound cavity bracket 420, the support plate 510 occupies a larger space, and the size of the cartridge housing 30 in the width direction Y increases. And the support plate 510 is too inclined compared with the sound cavity bracket 420, which is also disadvantageous for the support plate 510 to be mounted on the outer peripheral surface of the sound cavity bracket 420, and increases the difficulty in mounting the support plate 510 on the sound cavity bracket 420.

Therefore, the angle α is set to be 0 ° to 10 °, so that the main surface of the support plate 510 facing away from the sound cavity support 420 is parallel or nearly parallel to the axial direction of the sound cavity support 420, so that the space occupied by the support plate 510 in the axial direction of the sound cavity support 420 is reduced, thereby improving the space utilization rate, and simultaneously, the support plate 510 is also convenient to be mounted on the outer peripheral surface of the sound cavity support 420.

In some embodiments, a major surface of the support plate 510 facing away from the sound cavity bracket 420 may be disposed perpendicular to a major surface of the main control circuit board 60 facing toward or facing away from the speaker assembly 40, or a major surface of the support plate 510 may be at an angle of 80 ° to 90 ° to a major surface of the main control circuit board 60.

As an example, the main surface of the main control circuit board 60 may be as shown by a plane SF in fig. 8, and the main surface of the support plate 510 may be at an angle β with respect to the main surface of the main control circuit board 60 as shown by an angle β in fig. 8, wherein 80 β is equal to or less than 90 °. For example, the angle β may be a value of 80 °, 83 °, 85 °, 88 °, or 90 °.

If the angle β is smaller than 80 ° or larger than 90 °, it means that the support plate 510 is inclined to a greater extent than the main control circuit board 60, and the support plate 510 occupies a larger space in a direction parallel to the main surface of the main control circuit board 60, thereby increasing the size of the deck housing 30 in this direction. When the angle β is equal to 90 °, it is explained that the main surface of the support board 510 and the main surface of the main control circuit board 60 are perpendicular to each other.

Therefore, the included angle between the main surface of the support plate 510 and the main surface of the main control circuit board 60 is set to be 80 ° to 90 °, so that the main surface of the support plate 510 is perpendicular or nearly perpendicular to the main surface of the main control circuit board 60, and the arrangement is such that the support plate 510 reduces the occupied space in the direction parallel to the main surface of the main control circuit board 60, thereby improving the space utilization rate. In some embodiments, the support plate 510 and the main control circuit board 60 may be plate-shaped, so that the support plate 510 and the main control circuit board 60 may be disposed vertically or nearly vertically.

In some embodiments, as shown in fig. 5 and 7, a support surface 421 may be provided on an outer circumferential surface of the sound cavity bracket 420, and a side of the support plate 510 facing the sound cavity bracket 420 may be supported on the support surface 421. The sound cavity bracket 420 may further be provided with a limiting mechanism 422 for limiting the support plate 510.

As an example, the provision of the support surface 421 may facilitate a better support of the support plate 510 on the acoustic cavity bracket 420. The limiting mechanism 422 may be disposed on the supporting surface 421 or around the supporting surface 421 to limit the supporting plate 510, so as to prevent movement of the supporting plate 510 and the key assembly 50 as much as possible, thereby improving structural stability of the earphone 1, and avoiding occurrence of bad triggering of the key assembly 50 as much as possible.

In other embodiments, an adhesive medium may be directly added between the main surface of the support plate 510 and the support surface 421, where the adhesive medium is used to adhere the support plate 510 and the support surface 421, so as to fix and limit the key assembly 50 on the support surface 421, without providing the limiting mechanism 422. The bonding medium can be glue or a substance with certain adhesive force such as double-sided adhesive tape.

Alternatively, in other embodiments, the main surface of the support plate 510 and the support surface 421 may be fixed by welding, fastening, or screwing, which is not specifically described herein.

In some embodiments, as shown in fig. 7 and 8, the limiting mechanism 422 may include a first limiting portion 4221 disposed on a side of the supporting surface 421 away from the main control circuit board 60. The first limiting portion 4221 may be provided to limit the support plate 510 in the first direction. The first direction is a direction parallel to the supporting surface 421 and away from the main control circuit board 60. The first direction C may be parallel to the thickness direction Z of the deck housing 30, and the first limiting portion 4221 limits a side of the support plate 510 away from the main control circuit board 60 in a direction parallel to the thickness direction Z. Alternatively, the first direction C may be other directions inclined with respect to the thickness direction Z, for example, a direction having an angle with the axis of the main speaker 410, which may correspond to the angle α formed by the axial direction of the support plate 510 and the voice-cavity bracket 420. As an example, the first direction may be as shown by arrow C in fig. 7.

In some embodiments, the first limiting portion 4221 may be protruded relative to the supporting surface 421, and the first limiting portion 4221 and the main control circuit board 60 may be disposed along an axial direction of the main speaker 410 at intervals, and a side of the supporting plate 510 away from the main control circuit board 60 may be abutted against the first limiting portion 4221.

In some embodiments, as shown in fig. 5 to 8, a pressing block 70 may be disposed between the main control circuit board 60 and the support board 510, where the pressing block 70 is configured to elastically abut against a first edge 511 of the support board 510 facing the main control circuit board 60, so that a second edge 512 of the support board 510 facing away from the main control circuit board 60 is supported on the first limiting portion 4221.

In some embodiments, the press block 70 may be a spring or a foam block or the like having elastic properties. The pressing block 70 may be fixedly connected with the main control circuit board 60 by means of bonding, screw connection or sealing connection, etc., and the first plate edge 511 of the supporting plate 510 is pressed against one end of the pressing block 70 facing away from the main control circuit board 60, so that the pressing block 70 limits the supporting plate 510 in the opposite direction of the first direction C. The arrangement of the elastic pressing block 70 facilitates flexible installation of the support plate 510 and the key assembly 50 on the sound cavity bracket 420, and reduces the assembly difficulty of the support plate 510 and the requirement on assembly accuracy.

The pressing block 70 and the first limiting portion 4221 may be disposed at intervals along the first direction C, where the pressing block 70 and the first limiting portion 4221 act on the supporting plate 510 together to limit the supporting plate 510 in a direction opposite to the first direction C, so that the supporting plate 510 is not easy to slide along the direction opposite to the first direction C and separate from the supporting surface 421, and the key assembly 50 is fixed in the direction opposite to the first direction C and the first direction C, thereby improving the structural stability of the interior of the movement housing 30, and avoiding the occurrence of poor touch as much as possible.

In some embodiments, as shown in fig. 7, the limiting mechanism 422 may further include a second limiting portion 4222, and the second limiting portion 4222 may be disposed on the periphery of the supporting surface 421 along the second direction. The second direction may be parallel to the support surface 421 and perpendicular to the first direction C. The second direction may be a direction perpendicular to the first direction C. The second limiting portion 4222 may be used to limit the support plate 510 in the second direction, so as to prevent the support plate 510 from sliding in the second direction and being separated from the support surface 421. As an example, the second direction corresponds to an angle α formed by the support plate 510 and the axial direction of the voice cavity bracket 420. As an example, if the included angle α is equal to 0 °, the second direction is the longitudinal direction X of the deck housing 30. In other embodiments, the second direction D may also be other directions inclined compared to the width direction Y. As an example, the second direction may be perpendicular to the first direction C as indicated by an arrow D in fig. 7.

As an example, the number of the second limiting parts 4222 may be two arranged at intervals in the second direction D, and the support plate 510 is located between the two second limiting parts 4222. As shown in fig. 7, the two second limiting portions 4222 may be disposed on two sides of the supporting surface 421 along the second direction D, and protrude relative to the supporting surface 421, and two ends of the supporting plate 510 along the second direction D are respectively abutted on the two second limiting portions 4222, so that the two second limiting portions 4222 may limit the supporting plate 510 in the second direction D.

As an example, as shown in fig. 5 and 7, the support plate 510 may include a main body portion 513 and a hook portion 514 connected to the main body portion 513. The main body 513 may be supported on the support surface 421. The key body 520 may be disposed on the main body 513. The hook 514 may be hung on a side of the second limiting portion 4222 facing away from the supporting surface 421. As an example, as shown in fig. 6, the second limiting portion 4222 may be elongated with respect to the supporting surface 421 and protrudes from the supporting surface 421. In the second direction D, the second limiting portion 4222 contacts the main body portion 513 of the support plate 510 on one side and the hook portion 514 on the other side, and thus the second limiting portion 4222 can limit the support plate 510 in the second direction D by blocking the main body portion 513 and the hook portion 514. So set up, can be convenient for install backup pad 510 on sound cavity support 420, can reduce the assembly degree of difficulty of backup pad 510 and sound cavity support 420, also can reduce the processing degree of difficulty of sound cavity support 420 simultaneously.

As an example, the number of the second limiting parts 4222 may be two arranged at intervals in the second direction D, and the support plate 510 is located between the two second limiting parts 4222. While the support plate 510 may include a main body portion 513 and a hook portion 514 coupled to the main body portion 513. The main body 513 may be supported on the support surface 421. The key body 520 may be disposed on the main body 513. The hook 514 may be hung on a side of the second limiting portion 4222 facing away from the supporting surface 421. So configured, the sliding of the support plate 510 and the key assembly 50 in the second direction D can be further prevented.

In some embodiments, as shown in fig. 7 and 8, the limiting mechanism 422 may include a third limiting portion 4223 perpendicular to the supporting surface 421 and spaced from the supporting surface 421, where the third limiting portion 4223 is located on a side of the supporting plate 510 away from the supporting surface 421, and the third limiting portion 4223 is used to limit the supporting plate 510 in a direction perpendicular to the supporting surface 421.

As an example, the third limiting portion 4223 may be connected to the first limiting portion 4221 and perpendicular to the first limiting portion 4221.

As an example, the third limiting portion 4223 may extend from a top end of the first limiting portion 4221 and toward a direction away from the first direction C, and the third limiting portion 4223 may form a mounting groove 4224 together with the first limiting portion 4221 and the supporting surface 421, and the first plate edge 511 of the supporting plate 510 is disposed in the mounting groove 4224. The third limiting portion 4223 and the supporting surface 421 limit the supporting plate 510 in a direction perpendicular to the supporting surface 421, so that the supporting plate 510 is fixed on the supporting surface 421, and the supporting plate 510 is not easy to slide along the direction perpendicular to the supporting surface 421, so that the supporting plate 510 is further stabilized, the structural tightness between the sound cavity bracket 420 and the supporting plate 510 is improved, and the triggering sensitivity of the key assembly 50 is ensured.

In some embodiments, as shown in fig. 7, the second limiting portion 4222 may extend in a direction away from the first direction C to form a fixed post 4225, and the fixed post 4225 is spaced from the supporting surface 421 in a direction perpendicular to the supporting surface 421. The hook portion 514 of the support plate 510 is hung on the second limiting portion 4222. The main control circuit board 60 may be provided with a mounting hole 610 at a position corresponding to the fixing post 4225, and the fixing post 4225 may further extend into the mounting hole 610, so as to fix the main control circuit board 60 and the sound cavity bracket 420 to each other. By means of the arrangement, multiplexing of the second limiting portion 4222 can be achieved, the structure between the sound cavity support 420, the main control circuit board 60 and the key assembly 50 is compact, and the space utilization rate of the movement shell 30 is improved.

By arranging the limiting mechanism 422 and the pressing block 70, the degrees of freedom of the supporting plate 510 in the first direction C, the second direction D and the direction perpendicular to the supporting surface 421 which are perpendicular to each other can be limited, so that the supporting plate 510 is not easy to loosen or separate from the supporting surface 421 in the first direction C, the reverse direction of the first direction C, the second direction D and the direction perpendicular to the supporting surface 421, and the key assembly 50 is fixed on the supporting surface 421 by the limiting mechanism 422, so that the structural compactness and the firmness of the movement housing 30 can be improved, and meanwhile, the situation that the key assembly 50 is not easy to trigger due to shaking of the supporting plate 510 is avoided as much as possible.

In some embodiments, as shown in fig. 4-8, a key hole 380 may be provided in the cartridge housing 30. Wherein the position of the key hole 380 may correspond to the position of the key assembly 50. The key part 310 may include a cantilever beam 311, a key cap 312, and a soft filler 313. Cantilever beam 311, soft filler 313, and key cap 312 may be disposed within key hole 380. The fixed end of the cantilever beam 311 may be located at the edge of the key hole 380 and integrally formed with the movement housing 30, the free end of the cantilever beam 311 faces to the key body 520 in the key assembly 50 on the side inside the movement housing 30, and the free end of the cantilever beam 311 faces away from the side inside the movement housing 30 and is connected with the key cap 312. The key cap 312 may be exposed to the outer surface of the movement housing 30 and used for being pressed by a user, and when the key cap 312 is pressed by the user, the key cap 312 may further push the free end of the cantilever beam 311 to move toward the interior of the movement housing 30 to trigger the key body 520, so as to transmit a corresponding control signal to the main control circuit board 60. The soft filler 313 may be used to fill the gaps between the cantilever beam 311 and the button cap 312 and the hole edge of the button hole 380.

In some embodiments, as shown in fig. 8, a protrusion 3111 is disposed on one side of the free end of the cantilever beam 311 connected to the key cap 312, a groove 3112 may be disposed at a position of the key cap 312 corresponding to the protrusion 3111, the protrusion 3111 is embedded in the groove 3112, and the cantilever beam 311 cooperates with the groove 3112 through the protrusion 3111 to fix and limit the key cap 312. Of course, in other embodiments, the cantilever beam 311 and the key cap 312 may be connected by bonding or clamping, and the embodiment is not limited herein.

In some embodiments, the soft filling body 313 may be a member with a certain elasticity, such as silica gel or rubber. Specifically, the soft filler 313 may be fixed to a side of the cantilever 311 facing away from the interior of the deck housing 30. The soft filling body 313 is arranged, so that impurities such as external liquid, dust and metal particles are not easy to enter the movement housing 30 from the key hole 380 to affect and damage elements inside the movement housing 30, thereby further improving the stability and safety inside the movement housing 30.

In some embodiments, as shown in fig. 9 to 11, the headset 1 may further include a magnet assembly 80 disposed inside the cartridge case 30, where the magnet assembly 80 has a certain magnetic absorption capability, so that the headset 1 can be absorbed in a corresponding charging box or other charging device.

In some embodiments, the polarization direction of the magnet assembly 80 may be the same as the polarization direction of the main magnet 413 of the main speaker 410. The main magnet 413 is disposed inside the main speaker 410. The main magnet 413 refers to a magnet element in the main speaker 410 that mainly provides a magnetic field, and the position of the main magnet 413 may be referred to in fig. 6 and 9.

The polarization direction of the magnet assembly 80 is set to be the same as that of the main magnet 413 of the main speaker 410, so that the magnet assembly 80 and the main magnet 413 together play a role in enabling the earphone 1 to be adsorbed in a corresponding charging box or other charging devices, the overall magnetic attraction of the earphone 1 is enhanced, the earphone 1 is ensured to be stably adsorbed in the charging box or other charging devices, and the charging effect is ensured.

In some embodiments, as shown in fig. 9 to 11, the speaker assembly 40 may further include a sub speaker 430, and the magnet assembly 80 and the sub speaker 430 may be disposed on a side of the main speaker 410 near the auricle 103 of the user in a wearing state along a vibration direction of the main speaker 410. In other words, in the thickness direction Z, the magnet assembly 80 and the auxiliary speaker 430 are respectively stacked with the main speaker 410.

In some embodiments, magnet assembly 80 and auxiliary speaker 430 may at least partially overlap when viewed along length direction X of deck housing 30, in conjunction with fig. 9, 10, and 11. In other words, the projection of the magnet assembly 80 onto the reference plane perpendicular to the length direction X at least partially coincides with the projection of the auxiliary speaker 430 onto the reference plane perpendicular to the length direction X. By the arrangement, the space utilization rate of the movement shell 30 can be improved, and the dimension of the movement shell 30 in the thickness direction Z is ensured not to be too large.

In some embodiments, the ratio between the projected area of the magnet assembly 80 along the thickness direction Z of the deck housing 30 and the projected area of the main magnet 413 of the main speaker 410 along the thickness direction Z may be 0.1-0.2.

If the ratio between the projected area of the magnet assembly 80 along the thickness direction Z of the deck housing 30 and the projected area of the main magnet 413 of the main speaker 410 along the thickness direction Z is smaller than 0.1, it is indicated that the area of the magnet assembly 80 is smaller, and sufficient magnetic attraction force cannot be provided, so that the headset 1 is stably attracted in the charging box or other charging device. If the ratio between the projected area of the magnet assembly 80 along the thickness direction Z of the deck housing 30 and the projected area of the main magnet 413 of the main speaker 410 along the thickness direction Z is greater than 0.2, it indicates that the magnet assembly 80 is larger, and the magnetic field formed by the magnet assembly 80 is stronger, and because the polarization direction of the magnet assembly 80 is the same as that of the main magnet 413, the magnetic field of the magnet assembly 80 is too strong, which can greatly affect the magnetic field of the main magnet 413, and affect the sound quality of the main speaker 410.

Therefore, the ratio between the projected area of the magnet assembly 80 along the thickness direction Z of the deck housing 30 and the projected area of the main magnet 413 of the main speaker 410 along the thickness direction Z is 0.1-0.2, so that the magnet assembly 80 has enough magnetic attraction force, the magnetic attraction force of the earphone 1 can be enhanced to facilitate the earphone 1 to be absorbed in a charging box or other charging devices, and the magnet assembly 80 will not greatly affect the magnetic field of the main magnet 413 even when the polarization direction of the magnet assembly 80 is the same as the polarization direction of the main magnet 413, thereby ensuring the sound quality of the main speaker 410.

As an example, the ratio between the projected area of the magnet assembly 80 in the thickness direction Z of the deck housing 30 and the projected area of the main magnet 413 of the main speaker 410 in the thickness direction Z may be a value of 0.1, 0.13, 0.16, 0.18, or 0.2, or the like.

In some embodiments, as shown in fig. 10 and 11, the vibration direction and the length direction X of the main speaker 410 may define a symmetry plane SG. The symmetry plane SG of the main speaker 410 is also the symmetry plane SG of the main magnet 413.

In some embodiments, as shown in fig. 10 and 11, the magnet assembly 80 may include two magnets 810, the two magnets 810 being located on both sides of the symmetry plane SG and symmetrically disposed with respect to the symmetry plane SG. The magnet 810 is a component having magnetic attraction, and for example, the magnet 810 may be a component having magnetic properties such as a manual magnet or a natural magnet.

Specifically, the two magnets 810 are symmetrically arranged along the symmetry plane SG, so that the magnetic field of the main magnet 413 can be balanced, the total magnetic field offset caused by a single magnet 810 can be reduced, the magnetic field of the main magnet 413 is nonlinear, and the main speaker 410 is further distorted, so that the sound quality effect of the earphone 1 is affected.

In summary, in the headset 1 of the present application, the main speaker 410, the sound cavity support 420 and the key assembly 50 are provided, and the sound cavity support 420 and the main speaker 410 can cooperate to form the acoustic rear cavity 401, so as to ensure the pick-up effect of the main speaker 410, and meanwhile, the sound cavity support 420 can support the key assembly 50, so that the function multiplexing of the sound cavity support 420 can be realized, and the key assembly 50 is not required to be supported and fixed by a support assembly, so that the space inside the headset 1 can be saved, the size of the headset 1 can be reduced, and the space utilization can be improved.

The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (15)

1. The earphone is characterized by comprising a machine core shell, a loudspeaker assembly and a key assembly, wherein the loudspeaker assembly and the key assembly are arranged in the machine core shell, the loudspeaker assembly comprises a main loudspeaker and a sound cavity support, the sound cavity support and the main loudspeaker are matched to form an acoustic rear cavity, the key assembly is supported on the sound cavity support, and a key part for pressing and triggering the key assembly is arranged on the machine core shell.

2. The earphone of claim 1, further comprising a main control circuit board laminated with the speaker assembly along a vibration direction of the main speaker, and a main surface of the main control circuit board is disposed toward or away from the speaker assembly, the sound cavity bracket is disposed around the main speaker, and the key assembly is supported on an outer peripheral surface of the sound cavity bracket and electrically connected to the main control circuit board.

3. The earphone of claim 2, wherein the key assembly comprises a support plate and a key body arranged on one side of the support plate, which is away from the sound cavity support, the key body is fixedly connected with the support plate, the support plate is fixedly supported on the outer peripheral surface of the sound cavity support, and an included angle formed by the main surface of the support plate, which is away from the sound cavity support, and the axial direction of the sound cavity support is 0-10 degrees.

4. A headset as claimed in claim 3, wherein the major surface of the support plate facing away from the sound cavity support is disposed perpendicular to the major surface of the main control circuit board facing towards or facing away from the speaker assembly, or the major surface of the support plate is at an angle of 80 ° to 90 ° to the major surface of the main control circuit board.

5. The earphone according to claim 3 or 4, wherein a supporting surface is provided on an outer circumferential surface of the sound cavity support, the supporting plate is supported on the supporting surface toward one side of the sound cavity support, and a limiting mechanism for limiting the supporting plate is further provided on the sound cavity support.

6. The earphone of claim 5, wherein the limiting mechanism comprises a first limiting portion disposed on a side of the support surface away from the main control circuit board, the first limiting portion being configured to limit the support plate in a first direction, wherein the first direction is a direction parallel to the support surface and away from the main control circuit board.

7. The earphone of claim 6, wherein a pressing block is disposed between the main control circuit board and the support board, and is configured to elastically abut against a first edge of the support board on a side facing the main control circuit board, so that a second edge of the support board on a side far away from the main control circuit board is supported on the first limiting portion.

8. The earphone of claim 6, wherein the limiting mechanism comprises a second limiting portion disposed on the periphery of the support surface along a second direction, the second direction being parallel to the support surface and perpendicular to the first direction, the second limiting portion being configured to limit the support plate in the second direction.

9. The earphone according to claim 8, wherein the number of the second limiting portions is two which are arranged at intervals along the second direction, the support plate is located between the two second limiting portions, or

The supporting plate comprises a main body part and a hook-shaped part connected with the main body part, the main body part is supported on the supporting surface, and the hook-shaped part is hung on one side of the second limiting part, which is away from the supporting surface.

10. The earphone of claim 8, wherein the limiting mechanism includes a third limiting portion perpendicular to the supporting surface and spaced apart from the supporting surface, the third limiting portion being located on a side of the supporting surface supporting the supporting plate, and the third limiting portion being configured to limit the supporting plate in a vertical direction of the supporting surface.

11. The earphone of claim 1, wherein the core housing is provided with a key hole, the key portion comprises a cantilever beam, a key cap and a soft filler, the cantilever beam, the soft filler and the key cap are arranged in the key hole, the cantilever beam and the core housing are integrally formed, the fixed end of the cantilever beam is positioned at the hole edge of the key hole, the key cap is arranged at the free end of the cantilever beam, and the soft filler is used for filling gaps between the cantilever beam and the hole edges of the key cap and the key hole.

12. The earphone of claim 11, further comprising an ear hook, wherein the cartridge case has a connection end connected to the ear hook and a free end remote from the connection end, wherein the ear hook is provided between an auricle and a head of a user in a wearing state, wherein the cartridge case is positioned on a front side of the auricle, wherein the free end at least partially covers or protrudes into a concha cavity, wherein the cartridge case has a length direction, a thickness direction and a width direction orthogonal to each other, wherein the length direction is a direction of spacing between the connection end and the free end, wherein the thickness direction is a direction toward or away from the auricle in a wearing state, wherein the cartridge case includes a first side wall and a second side wall provided along the width direction, and wherein the key portion is provided on the first side wall or the second side wall.

13. The earphone of claim 1, further comprising an ear hook and a magnet assembly, the cartridge housing having a connection end connected to the ear hook and a free end distal from the connection end, the magnet assembly having a polarization direction that is the same as a polarization direction of a main magnet of the main speaker;

The speaker assembly further comprises an auxiliary speaker, the magnet assembly and the auxiliary speaker are arranged on one side, close to the auricle of a user, of the main speaker in a wearing state along the vibration direction of the main speaker, and the magnet assembly and the auxiliary speaker are at least partially overlapped when observed along the length direction of the movement shell, and the length direction is the interval direction of the connecting end and the free end.

14. The headphone according to claim 13, wherein a ratio between a projected area of the magnet assembly in a thickness direction of the deck housing, which is a direction in which the deck housing faces or is away from a auricle of a user in a wearing state, and a projected area of the main magnet of the main speaker in the thickness direction is 0.1 to 0.2, the thickness direction and the length direction being orthogonal to each other.

15. The earphone of claim 13 or 14, wherein the vibration direction and the length direction of the main speaker define a symmetry plane, and the magnet assembly includes two magnets located on both sides of the symmetry plane and symmetrically disposed with respect to the symmetry plane.