Voice coil horizontal deviation self-correction type loudspeaker

Abstract

The invention relates to the technical field of loudspeakers, in particular to a voice coil horizontal deviation self-correction type loudspeaker, which comprises a shell, a main piston, a plurality of upper air guide pipes, a plurality of lower air guide pipes and an airflow control mechanism, and is characterized in that the airflow control mechanism comprises two air storage and release structures and a passive adjusting structure; the air storage and release structure comprises an air storage bin, an auxiliary piston and a push rod, the air storage bin is communicated with an inner cavity of the shell, and the two ends of the push rod are connected with the auxiliary piston and the passive adjusting structure respectively; the passive adjusting structure comprises a rotating shaft, a transmission rod and a connecting block, the middle of the transmission rod is connected with the rotating shaft, the two ends of the transmission rod are connected with the side wall of the main piston and the connecting block respectively, and the connecting block is connected with the push rod; the cylindrical limiting body, the correction generator, the upper air guide pipe, the lower air guide pipe and the air flow control mechanism are arranged, so that a large amount of air flow is prevented from quickly acting on the annular voice coil during large amplitude.

Description

TECHNICAL FIELD

[0001] The application relates to the field of loudspeakers, and particularly relates to a voice coil horizontal deviation self-correction formal loudspeaker. BACKGROUND

[0002] As a core device of electroacoustic conversion, a loudspeaker is widely applied to fields such as sound, automobile video and audio, and intelligent terminals, and the sound quality performance of the loudspeaker is closely related to the motion posture of a voice coil. In the working process of the loudspeaker, after an annular voice coil is connected with an alternating current, the annular voice coil generates reciprocating vibration in the magnetic field of a magnetic circuit system, and then drives a diaphragm to sound. However, due to manufacturing process errors, insufficient assembly precision and stress deformation in the vibration process, the annular voice coil is prone to horizontal position deviation, which is manifested in problems such as that the voice coil axis is not coincident with the central axis of the magnetic circuit system and that the gap between the inner wall of the voice coil and the cylindrical limiting body is uneven.

[0003] A loudspeaker for correcting voice coil horizontal deviation is disclosed in a patent with the publication number CN120034802B. The working principle is as follows: when the annular voice coil vibrates, the diaphragm is driven to move up and down, a push rod drives a piston to reciprocate in the air cavity, and the volume and pressure of the upper air cavity and the lower air cavity are changed; when the piston moves downward, external air enters the upper air cavity, and air in the lower air cavity is sprayed out from the lower air hole through the lower cavity and the lower air duct; when the piston moves upward, external air enters the lower air cavity, and air in the upper air cavity is sprayed out from the upper air hole through the upper cavity and the upper air duct; by using the characteristics that the upper and lower air holes are distributed at equal angles, a larger gas thrust is applied to the area where the gap between the inner wall of the voice coil is small, so that the horizontal deviation is corrected.

[0004] Although the above scheme realizes basic correction of voice coil horizontal deviation through gas flow thrust, the scheme only uses the upper and lower cavities to assist gas flow circulation, and when the amplitude of the loudspeaker is large, the piston stroke increases, a large amount of gas generated by the air cavity is quickly sprayed out through the air hole, and high-speed gas flow will impact the inner wall of the voice coil, which not only cannot accurately correct the deviation, but also may cause secondary displacement or vibration disorder of the voice coil, resulting in sound quality distortion. SUMMARY

[0005] In view of the above problems, a voice coil horizontal deviation self-correction formal loudspeaker is provided, which is provided with a cylindrical limiting body, a correction generator, an upper air guide pipe, a lower air guide pipe and a gas flow control mechanism, so that a large amount of gas flow is prevented from acting on the annular voice coil at a large amplitude, and excessive gas flow thrust is prevented from causing secondary displacement or vibration disorder of the voice coil.

[0006] In order to solve the prior art problems, the application provides a voice coil horizontal deviation self-correction formal loudspeaker, which comprises a cylindrical limiting body, an upper air channel and a lower air channel are arranged in the cylindrical limiting body; a correction generator, which comprises a shell and a main piston, the main piston divides an inner cavity of the shell into an upper air cavity and a lower air cavity, the upper air cavity and the lower air cavity are respectively provided with an upper air inlet and a lower air inlet with a one-way valve; a plurality of upper air guide pipes, the plurality of upper air guide pipes are arranged around an axis of the cylindrical limiting body, and the upper air guide pipes are connected with the upper air channel and the upper air cavity; a plurality of lower air guide pipes, the plurality of lower air guide pipes are arranged around the axis of the cylindrical limiting body, and the lower air guide pipes are connected with the lower air channel and the lower air cavity, and the voice coil horizontal deviation self-correction formal loudspeaker further comprises an air flow control mechanism arranged on one side of the shell, the air flow control mechanism comprises two air storage structures and a passive adjustment structure, the two air storage structures are arranged in a mirror image on the upper and lower sides of the passive adjustment structure; the air storage structure comprises an air storage chamber, a secondary piston and a push rod, the air storage chamber is connected with the inner cavity of the shell, the secondary piston divides an inner cavity of the air storage chamber into an air storage cavity and a movable cavity, and two ends of the push rod are connected with the secondary piston and the passive adjustment structure respectively; the passive adjustment structure comprises a rotating shaft, a transmission rod and a connecting block, two ends of the rotating shaft are connected with the shell through bearings, the middle part of the transmission rod is connected with the rotating shaft, two ends of the transmission rod are connected with the side wall of the main piston and the connecting block respectively, and the connecting block is connected with the push rod.

[0007] Preferably, the rotating shaft divides the transmission rod into two segments, the length ratio of the two segments is greater than 1, and the shorter segment is connected with the main piston.

[0008] Preferably, the air storage structure further comprises a gas cavity volume self-adaptive adjustment assembly, the gas cavity volume self-adaptive adjustment assembly is connected with the secondary piston and the push rod, and is used for self-adaptively adjusting the volume of the air storage cavity.

[0009] Preferably, the air storage structure further comprises a magnetic attraction fixing assembly, the magnetic attraction fixing assembly is used for fixedly connecting the secondary piston and the push rod.

[0010] Preferably, a sliding groove is formed in the connecting block, and the push rod is slidably connected with the sliding groove.

[0011] Preferably, the passive adjustment structure comprises a centering structure, the centering structure has two, the two centering structures are arranged on the upper and lower sides of the transmission rod respectively, and the centering structure is used for keeping the transmission rod not affected by the main piston to be horizontal.

[0012] Preferably, the centering structure comprises a fixing frame, a second guide rod and a second spring, the fixing frame is arranged on the shell, the second guide rod is slidably arranged on the fixing frame, and the second spring is sleeved on the second guide rod and used for providing a pushing force to the second guide rod towards the transmission rod.

[0013] Preferably, the centering structure further comprises a rubber sleeve, which is sleeved on one end of the second guide rod towards the transmission rod.

[0014] Preferably, the side wall of the main piston is provided with an annular groove, and when the upper wall and the lower wall of the annular groove are in contact with the transmission rod, the transmission rod is driven to rotate around the rotating shaft.

[0015] Preferably, the upper wall and the lower wall of the annular groove are both provided with an annular damping pad.

[0016] The beneficial effects of the present application compared with the prior art are:

[0017] 1. The present application sets a cylindrical limiting body, a correction generator, an upper air guide pipe, a lower air guide pipe and an air flow control mechanism, the main piston, the upper air guide pipe, the lower air guide pipe and the cylindrical limiting body cooperate to provide stable air flow thrust for horizontal deviation correction of the annular voice coil; the two gas storage structures and the passive adjustment structure in the air flow control mechanism cooperate with each other, through the linkage mechanism of precise air flow correction at small amplitude and expansion gas storage at large amplitude, the air discharge of the upper and lower air passages can be dynamically controlled, thereby avoiding that a large amount of air flow acts on the annular voice coil at large amplitude, and preventing that excessive air flow thrust causes secondary deviation or vibration disorder of the voice coil.

[0018] 2. The present application sets the length ratio of the transmission rods on both sides of the rotating shaft to be greater than 1, the short section is in contact with the main piston, and the long section is connected with the push rod, since the force arm of the long section of the transmission rod is longer, the small stroke of the main piston is amplified and transmitted to the long section, so that the upward moving stroke of the secondary piston in the gas storage chamber is much larger than the downward stroke of the main piston, the volume of the gas storage cavity is greatly expanded, and large-capacity gas storage is realized; when the main piston is reset upward, the main piston drives the short section of the transmission rod to rotate reversely, and the amplification of the long section also drives the secondary piston to move downward greatly, so that the gas in the gas storage cavity is quickly extruded to the corresponding gas cavity, and efficient exhaust is completed; in this process, the upper and lower gas storage chambers complete the action of "amplified stroke gas storage-amplified stroke exhaust" alternately with the movement of the main piston, and through the force arm ratio design of the eccentric rotating shaft, the small stroke of the main piston is amplified to the large stroke of the secondary piston, and the gas storage and exhaust efficiency of the gas storage chamber is effectively improved.

[0019] 3. The present application sets a gas cavity volume self-adaptive adjustment assembly, through the self-adjusting action of the gas cavity volume self-adaptive adjustment assembly, in the working condition that the small amplitude vibration of the main piston does not trigger the transmission rod, the secondary piston can be automatically driven to slide to adjust the volume of the gas storage cavity relying on the dynamic balance of the gas pressure and the spring force of the gas cavity, so that the gas storage adjustment function can still be actively played in the small vibration scene of the main piston without contacting the transmission rod. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a stereoscopic sectional view of a voice coil horizontal deviation self-correction loudspeaker of the present application.

[0021] Figure 2 is Figure 1 is a partial enlarged view at A in FIG. 4.

[0022] Figure 3 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0023] Figure 4 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0024] Figure 5 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0025] Figure 6 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0026] Figure 7 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0027] Figure 8 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0028] Figure 9 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0029] Figure 10 is a perspective view of a middle shell, an upper air guide pipe, a lower air guide pipe, a gas storage structure and a passive adjustment structure of a voice coil horizontal deviation self-correction formal loudspeaker.

[0030] The figure marks are: 1, cylindrical limiting body; 11, upper air passage; 12, lower air passage; 2, correction generator; 21, shell; 22, main piston; 221, annular groove; 23, upper air cavity; 24, lower air cavity; 25, shock pad; 3, upper air guide pipe; 4, lower air guide pipe; 5, air flow control mechanism; 51, air storage structure; 511, air storage bin; 5111, air storage cavity; 5112, movable cavity; 512, auxiliary piston; 513, push rod; 514, air cavity volume self-adaptive adjusting assembly; 5141, horizontal plate; 5142, first guide rod; 5143, first spring; 515, magnetic attraction fixing assembly; 5151, permanent magnet block; 52, passive adjusting structure; 521, rotating shaft; 522, transmission rod; 523, connecting block; 5231, sliding groove; 524, centering structure; 5241, fixed frame; 5242, second guide rod; 5243, second spring; 5244, rubber sleeve. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application is described in detail below in combination with the drawings and specific embodiments.

[0032] REFERENCE Figures 1 to 10The utility model discloses a voice coil horizontal deviation self-correction formal loudspeaker, including: the cylindrical limiting body 1 is equipped with upper air channel 11 and lower air channel 12 in, the correction generator 2 includes the casing 21 and main piston 22, the main piston 22 divides the inner chamber of casing 21 into upper air chamber 23 and lower air chamber 24, and upper air chamber 23 and lower air chamber 24 are provided with upper air inlet and lower air inlet with check valve respectively, a plurality of upper air ducts 3, a plurality of upper air duct 3 is arranged around the axis of cylindrical limiting body 1, and upper air duct 3 is connected with upper air channel 11 and upper air chamber 23, a plurality of lower air ducts 4, a plurality of lower air duct 4 is arranged around the axis of cylindrical limiting body 1, and lower air duct 4 is connected with lower air channel 12 and lower air chamber 24, further including the airflow control mechanism 5 set up in the casing 21 one side, the airflow control mechanism 5 includes two storage gas structure 51 and passive adjustment structure 52, two storage gas structure 51 is set up mirror image about passive adjustment structure 52, the storage gas structure 51 includes gas storage 511, auxiliary piston 512 and push rod 513, the gas storage 511 is connected with the inner chamber of casing 21, the auxiliary piston 512 divides the inner chamber of gas storage 511 into gas storage chamber 5111 and movable cavity 5112, and the two ends of push rod 513 are connected with auxiliary piston 512 and passive adjustment structure 52 respectively, passive adjustment structure 52 includes pivot 521, transmission rod 522 and connecting block 523, and the two ends of pivot 521 are connected with casing 21 through bearing, the middle part of transmission rod 522 is connected with pivot 521, the two ends of transmission rod 522 are connected with the side wall of main piston 22 and connecting block 523 respectively, and connecting block 523 is connected with push rod 513.

[0033] When the loudspeaker vibrates to produce sound, the vibration of the ring-shaped voice coil drives the main piston 22 to reciprocate up and down inside the shell 21; when the loudspeaker is not vibrating, the transmission rod 522 is in a horizontal state; when the main piston 22 moves downward in a small-amplitude working condition, the main piston 22 extrudes the lower air cavity 24, and the air in the lower air cavity 24 enters the lower air duct 12 of the cylindrical limiting body 1 through the circumferentially distributed lower air guide pipe 4, and the airflow uniformly applies a radial thrust to the inner wall of the ring-shaped voice coil when it is discharged from the lower air duct 12; if there is a horizontal position deviation of the ring-shaped voice coil (uneven gap between the inner wall and the cylindrical limiting body 1), the area with smaller gap will receive greater airflow thrust, forcing the voice coil to move towards the center, thereby correcting the horizontal deviation; in this process, a small amount of excess gas is extruded into the lower gas storage 511, and the volume of the gas storage cavity 5111 expands slightly; when the main piston 22 moves downward in a large-amplitude working condition, the descending stroke of the main piston 22 increases, and the main piston 22 contacts one end of the transmission rod 522, thereby driving the transmission rod 522 to rotate around the rotating shaft 521, and the transmission rod 522 drives the push rod 513 to move the secondary piston 512 upward, thereby greatly expanding the volume of the gas storage cavity 5111, and more gas in the lower air cavity 24 is introduced into the gas storage 511 to avoid the rapid discharge of a large amount of air through the lower air duct 12; at the same time, the secondary piston 512 of the upper gas storage 511 moves upward in linkage with the transmission rod 522, extruding the air in the gas storage cavity 5111 into the upper air cavity 23, thereby supplementing the volume of the upper air cavity 23; when the main piston 22 moves upward, the upper air cavity 23 is extruded, and the airflow enters the upper air duct 11 through the upper air guide pipe 3 to correct the horizontal deviation of the ring-shaped voice coil; at this time, the working states of the upper and lower gas storages 511 are switched, the lower gas storage 511 releases gas to supplement the lower air cavity 24, and the upper gas storage 511 stores excess gas of the upper air cavity 23, thereby repeating the above deviation correction and airflow control process. Through the linkage mechanism of precise airflow correction in small-amplitude and expansion of the gas storage in large-amplitude, the air discharge amount of the upper and lower air ducts can be dynamically controlled, thereby avoiding the rapid action of a large amount of airflow on the ring-shaped voice coil in large-amplitude, and preventing the secondary deviation or vibration disorder of the voice coil caused by excessive airflow thrust.

[0034] Referring to Figure 2 and Figure 5 , the rotating shaft 521 divides the transmission rod 522 into two segments, the length ratio of the two segments is greater than 1, and the shorter segment is in butt joint with the main piston 22.

[0035] When the main piston 22 is slightly lowered, the main piston 22 is first connected with the short section of the transmission rod 522, and as the main piston 22 continues to be lowered, the short section of the transmission rod 522 is rotated around the rotating shaft 521, and as the long section of the transmission rod 522 has a longer force arm, the small stroke of the main piston 22 is amplified and transmitted to the long section, the long section drives the connecting block 523 and the push rod 513 to move synchronously, so that the secondary piston 512 moves upward in the gas storage chamber 511, and the moving stroke of the secondary piston 512 is much larger than the lowering stroke of the main piston 22, the volume of the gas storage cavity 5111 is greatly expanded, at the same time, the gas pressure in the gas storage chamber 511 is reduced, more gas in the lower gas cavity 24 is sucked into the gas storage chamber 511, and large-capacity gas storage is realized; when the main piston 22 is reset upward, the main piston 22 drives the short section of the transmission rod 522 to rotate reversely, and the amplification of the long section also drives the secondary piston 512 to move downward greatly, so that the gas in the gas storage cavity 5111 is quickly extruded to the corresponding gas cavity, and efficient gas discharge is completed; in this process, the upper and lower gas storage chambers 511 move alternately with the main piston 22 to complete the action of "amplified stroke gas storage-amplified stroke gas discharge".

[0036] Referring to Figure 4 and Figure 6 As shown: the gas storage and discharge structure 51 further comprises a gas cavity volume self-adaptive adjusting assembly 514 connected with the secondary piston 512 and the push rod 513, and used for self-adaptively adjusting the volume of the gas storage cavity 5111.

[0037] Specifically, the gas cavity volume self-adaptive adjusting assembly 514 comprises a horizontal plate 5141 and a plurality of first guide rods 5142, the horizontal plate 5141 is parallel to the secondary piston 512, and the horizontal plate 5141 is connected with the push rod 513, the first guide rods 5142 vertically pass through the horizontal plate 5141, and the first guide rods 5142 are slidingly connected with the horizontal plate 5141, a first spring 5143 is sleeved on the first guide rod 5142, and two ends of the first spring 5143 are respectively abutted with the secondary piston 512 and the horizontal plate 5141.

[0038] When the loudspeaker vibrates to drive the main piston 22 to move in the shell 21, and the main piston 22 is not in contact with the transmission rod 522; if the main piston 22 moves downward slightly, the main piston 22 extrudes the lower air cavity 24, the air pressure in the lower air cavity 24 rises, and the airflow enters the lower air duct 4 partially for the annular voice coil horizontal deviation correction, and the remaining gas exerts an upward thrust on the auxiliary piston 512 of the gas storage structure 51, when the thrust is greater than the pre-tightening force of the first spring 5143 in the air cavity volume self-adaptive adjusting assembly 514, the auxiliary piston 512 slides along the first guide rod 5142 towards the horizontal plate 5141, the first spring 5143 is compressed, and the volume of the gas storage cavity 5111 increases synchronously with the movement of the auxiliary piston 512, which contains more air discharged from the lower air cavity 24, avoiding the excess gas directly discharged through the lower air duct 12; when the main piston 22 moves upward slightly, the main piston 22 resets to expand the volume of the lower air cavity 24 and reduce the air pressure, and the upward thrust on the auxiliary piston 512 decreases accordingly, when the thrust is less than the force of the first spring 5143, the first spring 5143 drives the auxiliary piston 512 to move away from the horizontal plate 5141 along the first guide rod 5142, and the volume of the gas storage cavity 5111 decreases synchronously, the stored air in the cavity is partially extruded back to the lower air cavity 24, which supplements the gas volume of the lower air cavity 24 and maintains the stable air cavity pressure. Through the self-adjusting effect of the air cavity volume self-adaptive adjusting assembly 514, in the working condition that the main piston 22 vibrates slightly without triggering the transmission rod 522, the auxiliary piston 512 can be automatically driven to slide to adjust the volume of the gas storage cavity 5111 based on the dynamic balance between the air pressure of the air cavity and the spring force, so as to realize the gas storage and adjustment function of the gas storage chamber 511 in the small vibration scene of the main piston 22 without contacting the transmission rod 522.

[0039] Referring to Figure 4 and Figure 7 As shown in the figure: the gas storage structure 51 further comprises a magnetic attraction fixing assembly 515, which is used for fixedly connecting the auxiliary piston 512 and the push rod 513.

[0040] Specifically, the magnetic attraction fixing assembly 515 comprises two permanent magnets 5151, which are respectively arranged on the horizontal plate 5141 and the auxiliary piston 512.

[0041] When the main piston 22 moves downward slightly (i.e. does not contact the transmission rod 522), the air pressure in the lower air cavity 24 rises, pushing the auxiliary piston 512 to move towards the horizontal plate 5141, and the volume of the gas storage cavity 5111 is self-adaptingly expanded; as the distance between the auxiliary piston 512 and the horizontal plate 5141 shortens, the permanent magnets 5151 arranged on the two gradually approach and attract each other, so that the auxiliary piston 512, the horizontal plate 5141 and the push rod 513 are fixedly connected into an integral whole through magnetic attraction, and the initial magnetic attraction fixing is completed; when the main piston 22 moves downward greatly (i.e. contacts the transmission rod 522), the main piston 22 pushes the transmission rod 522 to rotate, and the transmission rod 522 drives the push rod 513 to move upward; as the auxiliary piston 512 and the horizontal plate 5141 have been fixedly connected into an integral whole through magnetic attraction, the push rod 513 can directly drive the auxiliary piston 512 to move upward synchronously, and the volume of the gas storage cavity 5111 is increased again; in the whole process, the magnetic attraction fixing ensures that the push rod 513 and the auxiliary piston 512 have no relative displacement, and the power transmission is direct and efficient; when the main piston 22 moves upward, the air pressure in the lower air cavity 24 decreases, a low-pressure environment is formed in the gas storage cavity 5111, and the elastic force of the first spring 5143 pushes the auxiliary piston 512 away from the horizontal plate 5141; when the resultant force is greater than the attraction force of the two permanent magnets 5151, the permanent magnets 5151 are separated, the auxiliary piston 512 and the horizontal plate 5141, the push rod 513 are released from the fixing, and the auxiliary piston 512 is reset under the action of the pressure difference and the spring force, the volume of the gas storage cavity 5111 is reduced, and the cavity is backfilled with air to the lower air cavity 24, preparing for the next adjustment; through the attraction design of the double permanent magnets 5151 of the magnetic attraction fixing assembly 515, the quick fixing and separation of the auxiliary piston 512 and the push rod 513 under specific working conditions are realized, and the response efficiency of the gas storage structure 51 to the movement of the main piston 22 is improved.

[0042] Referring to Figure 7 As shown in the figure: the connecting block 523 is provided with a sliding groove 5231, and the push rod 513 is in sliding connection with the sliding groove 5231.

[0043] When the loudspeaker vibrates to drive the main piston 22 to move, and then triggers the transmission rod 522 to rotate around the rotation shaft 521, the connecting block 523 synchronously rotates around the rotation shaft 521 with the transmission rod 522, and the push rod 513 of the gas storage structure 51 needs to always keep vertical to stabilize the sliding of the driven piston 512, and the motion trajectories of the two are different, so a sliding groove 5231 is formed on the connecting block 523, and the push rod 513 and the connecting block 523 are connected through the sliding groove 5231, and with the rotation of the connecting block 523, the sliding block adaptively slides along the sliding groove 5231, and the connecting point of the connecting block 523 and the push rod 513 dynamically adjusts along the sliding groove 5231, and adaptively compensates the trajectory difference between the circular arc motion of the connecting block 523 and the vertical motion of the push rod 513 caused by the rotation of the transmission rod 522, so as to ensure that the push rod 513 always only bears the driving force in the vertical direction and keeps vertical, avoiding the problems of jamming or force deviation caused by the inclination of the push rod 513.

[0044] Referring to Figure 2 , Figure 4 and Figure 9 , the passive adjustment structure 52 includes a centering structure 524, the centering structure 524 has two, and the two centering structures 524 are respectively arranged on the upper and lower sides of the transmission rod 522, and the centering structure 524 is used to keep the transmission rod 522 not affected by the main piston 22 horizontal.

[0045] If the initial state of the transmission rod 522 is not kept horizontal, it will cause the trigger timing of the up and down motion of the main piston 22 to be asymmetric: when the main piston 22 moves up and down by the same stroke, the contact time and pushing force of the transmission rod 522 are different, and then the gas storage and exhaust actions of the upper and lower gas storage structures 51 are out of sync, and the airflow output of the upper and lower air chambers is unbalanced; the initial state of the transmission rod 522 is kept horizontal through the two centering structures 524, so as to ensure the symmetry of the trigger of the up and down motion of the main piston 22.

[0046] Referring to Figure 9 , the centering structure 524 includes a fixed frame 5241, a second guide rod 5242 and a second spring 5243; the fixed frame 5241 is arranged on the shell 21; the second guide rod 5242 is slidingly arranged on the fixed frame 5241; and the second spring 5243 is sleeved on the second guide rod 5242, and the second spring 5243 is used to provide a pushing force towards the transmission rod 522 for the second guide rod 5242.

[0047] When the loudspeaker vibrates to drive the main piston 22 to push the transmission rod 522 to rotate downward, the upper end of the transmission rod 522 is in relative extrusion with the end of the second guide rod 5242 of the upper central structure 524, so as to push the second guide rod 5242 to slide upward along the fixed frame 5241, and the upper second spring 5243 is further compressed and stores elastic potential energy; at this time, the lower central structure 524 is separated from the transmission rod 522. When the main piston 22 pushes the transmission rod 522 to rotate upward, the elastic potential energy of the second spring 5243 of the upper central structure 524 is released, so as to push the second guide rod 5242 to reset downward and abut against the transmission rod 522. When the main piston 22 resets and no longer exerts force on the transmission rod 522, the elastic return force of the second springs 5243 of the upper and lower central structures 524 is released, so as to exert a symmetrical reverse thrust on the transmission rod 522 through the second guide rod 5242, drive the transmission rod 522 to return to a horizontal state, and the second guide rod 5242 is also reset to the initial abutting position under the action of the spring. In the whole process, the central structure 524 always follows the rotation of the transmission rod 522 to adaptively stretch and contract, and adaptively adjusts the rotation of the transmission rod 522 in real time, so as to avoid the rigid hindering of the central structure 524 to the rotation of the transmission rod 522, and the spring pre-tightening force is provided for the stable support of the transmission rod 522.

[0048] Referring to Figure 9 It is shown in the figure that the central structure 524 further comprises a rubber sleeve 5244, which is sleeved on one end of the second guide rod 5242 towards the transmission rod 522.

[0049] When the transmission rod 522 rotates upward, the transmission rod 522 is separated from the lower second guide rod 5242, and when the transmission rod 522 rotates downward, the transmission rod 522 needs to first contact the second guide rod 5242, and direct collision between the two will produce vibration, causing the loudspeaker to produce noise, so the rubber sleeve 5244 is sleeved on the end of the second guide rod 5242, and when the transmission rod 522 rotates downward, the upper end of the transmission rod 522 first contacts the rubber sleeve 5244 of the upper central structure 524, the rubber sleeve 5244 buffers the impact force when the two contact through the elasticity of the rubber sleeve 5244, avoids hard contact and collision, greatly reduces the vibration generated in the contact moment, and thus prevents the noise caused by contact vibration.

[0050] Referring to Figure 2 and Figure 10 It is shown in the figure that the side wall of the main piston 22 is provided with an annular groove 221, and when the upper wall surface and the lower wall surface of the annular groove 221 contact the transmission rod 522, the transmission rod 522 is driven to rotate around the rotating shaft 521.

[0051] In the initial state, the two ends of the transmission rod 522 are in the annular groove 221 of the side wall of the main piston 22, and both the upper and lower walls of the annular groove 221 keep a gap with the transmission rod 522. The transmission rod 522 is in a horizontal state under the action of the centralizing structure 524. When the loudspeaker vibrates to move the main piston 22 downward, the main piston 22 synchronously drives the annular groove 221 to move downward, and the upper wall of the annular groove 221 gradually approaches and contacts the end of the transmission rod 522, thereby applying a downward thrust to the transmission rod 522 to drive the transmission rod 522 to rotate downward around the rotating shaft 521, and further drive the push rod 513 of the gas storage structure 51 to link with the auxiliary piston 512 to adjust the volume of the gas storage cavity 5111. When the main piston 22 moves upward, the annular groove 221 moves upward, and the lower wall of the annular groove 221 contacts the end of the transmission rod 522 and applies an upward thrust to drive the transmission rod 522 to rotate upward around the rotating shaft 521 to trigger the reverse adjustment of the gas storage structure 51. If the main piston 22 rotates axially during the up-down vibration, since the annular groove 221 is continuously provided along the circumferential direction of the side wall of the main piston 22, the upper and lower walls of the annular groove 221 always keep a circumferentially complete annular contact surface. Even if the main piston 22 rotates, the upper and lower walls of the annular groove 221 can still stably contact the end of the transmission rod 522 to continuously apply a precise driving force to the transmission rod 522. Thus, the annular groove 221 always serves as a transmission medium between the main piston 22 and the transmission rod 522 to ensure the continuity of power transmission.

[0052] Referring to Figure 10 As shown in the figure: The upper wall and the lower wall of the annular groove 221 are both provided with annular shock-absorbing pads 25.

[0053] When the loudspeaker vibrates to move the main piston 22 downward, the annular groove 221 moves downward synchronously with the main piston 22, and the annular shock-absorbing pad 25 on the upper wall of the annular groove 221 first contacts the end of the transmission rod 522. The elastic deformation of the shock-absorbing pad 25 buffers the impact force at the moment of contact, and at the same time, stably transmits the downward driving force to the transmission rod 522 to drive the transmission rod 522 to rotate downward around the rotating shaft 521, and further drive the gas storage structure 51 to link to adjust the volume of the gas storage cavity 5111. When the main piston 22 moves upward, the annular groove 221 moves upward, and the annular shock-absorbing pad 25 on the lower wall contacts the end of the transmission rod 522. Similarly, the elastic deformation of the shock-absorbing pad 25 buffers the impact and transmits the upward driving force to make the transmission rod 522 rotate reversely. By providing the annular shock-absorbing pads 25 on the upper and lower walls of the annular groove 221, the rigid contact between the main piston 22 and the transmission rod 522 is converted into a flexible contact, thereby reducing the vibration caused by the contact between the two.

[0054] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A voice coil horizontal deviation self-correcting conventional loudspeaker, comprising: Cylinder limiting body (1), internally provided with upper air passage (11) and lower air passage (12); Correction generator (2), including shell (21) and main piston (22), the main piston (22) separates the inner cavity of the shell (21) into upper air cavity (23) and lower air cavity (24), upper air cavity (23) and lower air cavity (24) are respectively provided with upper air inlet and lower air inlet with check valve;Multiple upper air ducts (3), multiple upper air ducts (3) are arranged around the axis of the cylinder limiting body (1), and the upper air duct (3) communicates the upper air passage (11) and the upper air cavity (23);Multiple lower air ducts (4), multiple lower air ducts (4) are arranged around the axis of the cylinder limiting body (1), and the lower air duct (4) communicates the lower air passage (12) and the lower air cavity (24), characterized by further comprising airflow control mechanism (5) arranged on one side of the shell (21), the airflow control mechanism (5) includes two gas storage structures (51) and passive adjustment structure (52), two gas storage structures (51) are mirror image arranged on the upper and lower sides of the passive adjustment structure (52); The gas storage structure (51) includes gas storage warehouse (511), auxiliary piston (512) and push rod (513), the gas storage warehouse (511) is communicated with the inner cavity of the shell (21), the auxiliary piston (512) separates the inner cavity of the gas storage warehouse (511) into gas storage cavity (5111) and movable cavity (5112), both ends of the push rod (513) are connected with the auxiliary piston (512) and the passive adjustment structure (52) respectively; The passive adjustment structure (52) includes rotating shaft (521), transmission rod (522) and connecting block (523), both ends of the rotating shaft (521) are connected with the shell (21) through bearing, the middle part of the transmission rod (522) is connected with the rotating shaft (521), both ends of the transmission rod (522) are connected with the side wall of the main piston (22) and the connecting block (523) respectively, the connecting block (523) is connected with the push rod (513).

2. A self-correcting loudspeaker according to claim 1, wherein, The rotating shaft (521) separates the transmission rod (522) into two sections, the length ratio of the two sections is greater than 1, and the shorter section is butted with the main piston (22).

3. A self-correcting loudspeaker according to claim 1, wherein, The gas storage structure (51) further includes gas cavity volume self-adaptive adjustment assembly (514), the gas cavity volume self-adaptive adjustment assembly (514) is connected with the auxiliary piston (512) and the push rod (513), and is used for self-adaptive adjustment of the volume of the gas storage cavity (5111).

4. A self-correcting loudspeaker according to claim 3, wherein, The gas storage structure (51) further includes magnetic attraction fixing assembly (515), the magnetic attraction fixing assembly (515) is used for fixedly connecting the auxiliary piston (512) and the push rod (513).

5. A self-correcting loudspeaker according to claim 1, wherein, The connecting block (523) is provided with a sliding groove (5231), and the push rod (513) is slidably connected with the sliding groove (5231).

6. A self-correcting loudspeaker according to claim 1, wherein, The passive adjusting structure (52) comprises a centering structure (524), the centering structure (524) has two, two centering structures (524) are respectively arranged on the upper and lower sides of the transmission rod (522), and the centering structure (524) is used for keeping the transmission rod (522) not acted on by the main piston (22) horizontal.

7. A self-correcting loudspeaker according to claim 6, wherein, The centering structure (524) comprises a fixing frame (5241), a second guide rod (5242) and a second spring (5243). The fixing frame (5241) is arranged on the shell (21). The second guide rod (5242) is slidingly arranged on the fixing frame (5241). The second spring (5243) is sleeved on the second guide rod (5242), and the second spring (5243) is used for providing a pushing force to the second guide rod (5242) towards the transmission rod (522).

8. A self-correcting loudspeaker according to claim 7, wherein, The centering structure (524) further comprises a rubber sleeve (5244) sleeved on one end of the second guide rod (5242) towards the transmission rod (522).

9. A self-correcting loudspeaker according to claim 1, wherein, The side wall of the main piston (22) is provided with an annular groove (221), and when the upper wall surface and the lower wall surface of the annular groove (221) are in contact with the transmission rod (522), the transmission rod (522) is driven to rotate around the rotating shaft (521).

10. A self-correcting loudspeaker according to claim 9, wherein, The upper wall surface and the lower wall surface of the annular groove (221) are both provided with an annular damping pad (25).

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