Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin stand, a magnetic circuit assembly, a vibration assembly, a blocking cover and a shielding assembly, and is characterized in that the magnetic circuit assembly comprises a yoke and a magnetic assembly arranged on the yoke, and a magnetic gap is formed in the magnetic assembly; the vibration assembly comprises a diaphragm assembly and a voice coil, the diaphragm assembly is connected with the basin frame and the voice coil, and the voice coil is arranged corresponding to the magnetic gap; the blocking cover is respectively connected with the basin stand and the yoke, the blocking cover is provided with a surrounding edge, the surrounding edge is provided with an air leakage hole, and the blocking cover is provided with a chute; the shielding assembly comprises a rolling shaft, a roller shutter and a sliding block, the sliding block is arranged in a sliding mode along the sliding groove, one end of the roller shutter is connected with the sliding block, and the other end of the roller shutter is wound around the rolling shaft; the frame, the magnetic circuit assembly, the diaphragm assembly and the cover enclose to form an internal space, the internal space is communicated with the outside through the vent hole, and the roller shutter is used for shielding the vent hole to adjust the total area of the vent hole communicated with the outside. The miniature loudspeaker is novel in structure, can realize the adjustment of the air leakage area, has extremely high universality, and can meet various different application requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a miniature loudspeaker. Background Art

[0002] The total area of ​​the vent holes on a microspeaker is fixed. Once a microspeaker is manufactured, it's difficult to change the vent area without re-molding and re-running the product. This makes it impossible to use the same microspeaker in different module housings to meet the performance requirements of different speaker modules. In short, the vent area of ​​existing microspeakers cannot be adjusted to meet different application requirements. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a micro loudspeaker with adjustable air discharge area.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a micro speaker, comprising:

[0005] basin rack;

[0006] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a magnetic assembly disposed on the yoke, the magnetic assembly forming a magnetic gap;

[0007] a vibration assembly, the vibration assembly comprising a diaphragm assembly and a voice coil, the diaphragm assembly connecting the basin frame and the voice coil, the voice coil being arranged corresponding to the magnetic gap;

[0008] A retaining cover, the retaining cover is connected to the basin frame and the yoke respectively, the retaining cover has a surrounding edge, the surrounding edge is provided with an air leakage hole, and the retaining cover is provided with a sliding groove;

[0009] A shielding assembly, the shielding assembly comprising a winding shaft, a rolling curtain and a slider, the slider being slidably arranged along the slide groove, one end of the rolling curtain being connected to the slider, and the other end of the rolling curtain being wound on the winding shaft;

[0010] The basin frame, magnetic circuit assembly, diaphragm assembly and cover together form an internal space, and the internal space is connected to the outside world through the air leakage hole. The roller shutter is used to cover the air leakage hole to adjust the total area of ​​the air leakage hole connected to the outside world.

[0011] Furthermore, the winding shaft and the roller blind are located in the internal space, and the winding shaft is connected to the blocking cover and / or the basin frame.

[0012] Furthermore, the winding shaft is an elastic winding mechanism, the winding shaft is rotatably connected to the blocking cover and / or the basin frame, the slider is in contact with the blocking cover, and the static friction between the slider and the blocking cover is greater than the winding force of the winding shaft.

[0013] Furthermore, the shielding assembly also includes a locking screw, the head of the locking screw is exposed from the blocking cover, the tail end of the locking screw is connected to the slider, and the slider is located in the internal space.

[0014] Furthermore, a baffle is provided on the baffle cover, the baffle is located in the internal space and is arranged corresponding to the slide groove, the slider has a friction surface for contacting the baffle, and a partial area of ​​the slider extends into the slide groove.

[0015] Furthermore, a friction pad is provided on the slider, and the friction surface of the slider indirectly contacts the baffle through the friction pad.

[0016] Furthermore, the rolling curtain is arranged close to the surrounding edge.

[0017] Furthermore, the outer surface of the blocking cover has a scale mark arranged close to the sliding groove.

[0018] Furthermore, the two ends of the blocking cover are respectively provided with the surrounding edges, the number of the shielding components is two groups, and the two groups of shielding components are respectively provided close to the two ends of the blocking cover.

[0019] Furthermore, there are multiple air leakage holes.

[0020] The beneficial effects of the present invention are as follows: the micro-speaker has a novel structure, and the covering area of ​​the roller shutter for the air leakage hole can be adjusted by sliding the slider, thereby adjusting the air leakage area of ​​the micro-speaker, and then adjusting the Q value, THD, amplitude and other parameters of the micro-speaker to meet the application requirements of different speaker modules for the micro-speaker, greatly improving the versatility of the micro-speaker itself, and helping to reduce the design cost and mold opening cost of the micro-speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a micro-speaker according to the first embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a portion of the micro-speaker according to the first embodiment of the present invention;

[0023] Figure 3 A partial cross-sectional view of the micro-speaker according to the first embodiment of the present invention;

[0024] Figure 4 This is a partial cross-sectional view of the micro-speaker according to the second embodiment of the present invention.

[0025] Description of labels:

[0026] 1. Basin rack;

[0027] 2. Magnetic circuit assembly; 21. Yoke; 211. Pressed groove;

[0028] 3. Vibration component;

[0029] 4. Cover; 41. Bottom plate; 411. Cross mounting groove; 42. Edge; 421. Air vent; 43. Slide; 44. Baffle;

[0030] 5. Shielding assembly; 51. Reeling shaft; 52. Roller blind; 53. Slider; 531. Friction surface;

[0031] 6. Centering support piece;

[0032] 7. Locking screw. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0034] Please refer to Figures 1 to 4 , a micro speaker comprising:

[0035] Basin rack 1;

[0036] A magnetic circuit assembly 2, comprising a yoke 21 and a magnetic assembly disposed on the yoke 21, wherein the magnetic assembly forms a magnetic gap;

[0037] a vibration assembly 3, the vibration assembly 3 including a diaphragm assembly and a voice coil, the diaphragm assembly connecting the basin frame 1 and the voice coil, the voice coil being arranged corresponding to the magnetic gap;

[0038] The blocking cover 4 is connected to the basin frame 1 and the yoke 21 respectively. The blocking cover 4 has a peripheral edge 42 , and an air leakage hole 421 is provided on the peripheral edge 42 . The blocking cover 4 is provided with a sliding groove 43 .

[0039] The shielding assembly 5 includes a winding shaft 51, a rolling curtain 52, and a slider 53. The slider 53 is slidably arranged along the slide groove 43. One end of the rolling curtain 52 is connected to the slider 53, and the other end of the rolling curtain 52 is wound on the winding shaft 51.

[0040] The basin frame 1, magnetic circuit assembly 2, diaphragm assembly and cover 4 together form an internal space, which is connected to the outside world through the air leakage hole 421. The roller shutter 52 is used to cover the air leakage hole 421 to adjust the total area of ​​the air leakage hole 421 connected to the outside world.

[0041] From the above description, it can be seen that the beneficial effects of the present invention are: the micro-speaker has a novel structure, and the blocking area of ​​the roller curtain 52 for the air leakage hole 421 can be adjusted by sliding the slider 53, thereby adjusting the total amount of air leakage of the micro-speaker, and then realizing the adjustment of the Q value, THD, amplitude and other parameters of the micro-speaker to meet the application requirements of different speaker modules for the micro-speaker, greatly improving the versatility of the micro-speaker itself, and helping to reduce the design cost and mold opening cost of the micro-speaker.

[0042] Furthermore, the winding shaft 51 and the rolling curtain 52 are located in the internal space, and the winding shaft 51 is connected to the blocking cover 4 and / or the basin frame 1.

[0043] It can be seen from the above description that the shielding component 5 is located in the internal space, which can fully protect the shielding component 5 and reduce the probability of damage to the shielding component 5.

[0044] Furthermore, the winding shaft 51 is an elastic winding mechanism, the winding shaft 51 is rotatably connected to the blocking cover 4 and / or the basin frame 1, the slider 53 is in contact with the blocking cover 4, and the static friction between the slider 53 and the blocking cover 4 is greater than the winding force of the winding shaft 51.

[0045] As can be seen from the above description, the reel 51 can automatically reel in the rolling curtain 52, so that the rolling curtain 52 can be properly arranged and will not interfere with the vibration component 3 of the micro speaker, which is beneficial to ensuring the working stability of the micro speaker.

[0046] Furthermore, the shielding assembly 5 further includes a locking screw 7 , the head of the locking screw 7 is exposed from the blocking cover 4 , the tail end of the locking screw 7 is connected to the slider 53 , and the slider 53 is located in the internal space.

[0047] As can be seen from the above description, the greater the degree of locking of the slider 53 by the locking screw 7 , the greater the static friction between the slider 53 and the blocking cover 4 , thereby preventing the roller blind 52 from being unexpectedly retracted when driven by the reeling shaft 51 .

[0048] Furthermore, a baffle 44 is provided on the blocking cover 4, and the baffle 44 is located in the internal space and is arranged corresponding to the slide groove 43. The slider 53 has a friction surface 531 for contacting the baffle 44, and a partial area of ​​the slider 53 extends into the slide groove 43.

[0049] As can be seen from the above description, a relatively strong static friction force is generated between the slider 53 and the baffle 44 , thereby preventing the rolling curtain 52 from being unexpectedly rolled up when driven by the winding shaft 51 .

[0050] Furthermore, a friction pad is provided on the slider 53 , and the friction surface 531 of the slider 53 indirectly contacts the baffle 44 through the friction pad.

[0051] From the above description, it can be seen that the setting of the friction pad can not only reduce the friction loss of the slider 53, but also provide the slider 53 with stronger static friction, thereby ensuring that the roller blind 52 will not be unexpectedly rolled up under the drive of the winding shaft 51.

[0052] Furthermore, the rolling curtain 52 is disposed close to the surrounding edge 42 .

[0053] As can be seen from the above description, disposing the rolling curtain 52 close to the surrounding edge 42 can not only reduce the impact of the rolling curtain 52 on the layout of the magnetic circuit assembly 2, but also better adjust the air leakage area of ​​the micro speaker.

[0054] Furthermore, the outer surface of the blocking cover 4 has a scale mark arranged near the sliding groove 43.

[0055] As can be seen from the above description, the scale mark is used to remind the user of the air discharge area of ​​the micro-speaker when the slider 53 is at the current position, thereby bringing convenience to the user's adjustment operation.

[0056] Furthermore, the two ends of the blocking cover 4 are respectively provided with the surrounding edges 42 , and the number of the shielding components 5 is two groups, and the two groups of shielding components 5 are respectively provided close to the two ends of the blocking cover 4 .

[0057] Furthermore, there are multiple air leakage holes 421.

[0058] It can be seen from the above description that the rolling curtain 52 can cover part or all of the air leakage holes 421 .

[0059] Example 1

[0060] Please refer to Figures 1 to 3The first embodiment of the present invention is as follows: a micro speaker includes a basin frame 1, a magnetic circuit component 2, a vibration component 3, a cover 4 and a shielding component 5, wherein the magnetic circuit component 2 includes a yoke 21 and a magnetic component provided on the yoke 21, and the magnetic component forms a magnetic gap; the vibration component 3 includes a diaphragm component and a voice coil, the diaphragm component connects the basin frame 1 and the voice coil, and the voice coil is provided corresponding to the magnetic gap; the cover 4 connects the basin frame 1 and the yoke 21 respectively, and the cover 4 has a surrounding edge 42, and the surrounding edge 42 is provided with an air leakage hole 421 , a slide groove 43 is provided on the cover 4; the shielding assembly 5 includes a winding shaft 51, a rolling curtain 52 and a slider 53, the slider 53 is slidably arranged along the slide groove 43, one end of the rolling curtain 52 is connected to the slider 53, and the other end of the rolling curtain 52 is wound on the winding shaft 51; the basin frame 1, the magnetic circuit assembly 2, the diaphragm assembly and the cover 4 are enclosed to form an internal space, and the internal space is connected to the outside world through the air leakage hole 421, and the rolling curtain 52 is used to block the air leakage hole 421 to adjust the total area of ​​the air leakage hole 421 connected to the outside world.

[0061] In this embodiment, the yoke 21 is cross-shaped as a whole, and the magnetic assembly includes a central magnetic structure and a side magnetic structure. The central magnetic structure is arranged in the central area of ​​the yoke 21, and the four end areas of the yoke 21 are respectively provided with the side magnetic structures. The gap between the side magnetic structure and the central magnetic structure is the magnetic gap; specifically, the central magnetic structure includes a central magnetic steel and a central washer located on the side of the central magnetic steel away from the yoke 21, and the central magnetic steel connects the central washer and the yoke 21. The side magnetic structure includes a side magnetic steel and a side washer located on the side of the side magnetic steel away from the yoke 21, and the side magnetic steel connects the side washer and the yoke 21, and the side washer is connected to the basin frame 1.

[0062] The blocking cover 4 includes a base plate 41, and the surrounding edge 42 is located at the edge of the base plate 41. Preferably, the surrounding edge 42 and the base plate 41 are an integral structure formed by integral processing. A cross mounting groove 411 is provided in the central area of ​​the base plate 41, and the edge of the bottom surface of the yoke 21 is provided with a pressing groove 211 that matches the edge of the cross mounting groove 411. Part of the area of ​​the base plate 41 is located in the pressing groove 211.

[0063] Optionally, the micro speaker further includes a centering support plate 6 , which connects the voice coil and the basket 1 , and the surrounding edge 42 is connected to the centering support plate 6 . In this embodiment, the surrounding edge 42 is indirectly connected to the basket 1 through the centering support plate 6 .

[0064] In some embodiments, it is acceptable for the shielding component 5 to be exposed on the blocking cover 4, so as to avoid the shielding component 5 occupying the internal space, so that the micro-speaker can be equipped with a larger magnetic circuit component 2, thereby improving the performance of the micro-speaker; but in order to reduce the chance of damage to the shielding component 5, in this embodiment, the winding shaft 51 and the roller shutter 52 are located in the internal space, and the winding shaft 51 is connected to the blocking cover 4 and / or the basin frame 1.

[0065] Preferably, the winding shaft 51 is an elastic winding mechanism, the winding shaft 51 is rotatably connected to the blocking cover 4 and / or the basin frame 1, the slider 53 is in contact with the blocking cover 4, and the static friction between the slider 53 and the blocking cover 4 is greater than the winding force of the winding shaft 51.

[0066] In this embodiment, a baffle 44 is provided on the blocking cover 4, and the baffle 44 is located in the internal space and is arranged corresponding to the slide groove 43. The slider 53 has a friction surface 531 for contacting the baffle 44, and a partial area of ​​the slider 53 extends into the slide groove 43. The staff can drive the roller shutter 52 by sliding the slider 53 that extends into the slide groove 43. When the slider 53 is slid to the preset position and the slider 53 is released, the static friction between the slider 53 and the baffle 44 can prevent the winding shaft 51 from winding up the roller shutter 52, thereby avoiding unexpected movement of the roller shutter 52.

[0067] In actual products, a friction pad may be further provided on the slider 53 , and the friction surface 531 of the slider 53 indirectly contacts the baffle 44 through the friction pad. The material of the friction pad may be silicone or the like.

[0068] The rolling curtain 52 is disposed close to the surrounding edge 42 , and the number of the air leakage holes 421 is multiple.

[0069] To facilitate the operation of the staff, the outer surface of the cover 4 has a scale mark set near the slide 43, and the scale mark can be a scale line, a number, a symbol, etc. Preferably, the number of the scale mark is multiple, and the multiple scale marks are set along the length direction of the slide 43.

[0070] In this embodiment, the two ends of the barrier cover 4 are provided with the surrounding edges 42, and the number of the shielding components 5 is two groups, and the two groups of shielding components 5 are respectively provided near the two ends of the barrier cover 4. The specific number of the shielding components 5 can be set as needed.

[0071] Example 2

[0072] Please refer to Figure 4, Example 2 of the present utility model is a parallel technical solution of Example 1, and the difference from Example 1 is that: the shielding component 5 also includes a locking screw 7, the head of the locking screw 7 is exposed from the bottom plate 41 of the blocking cover 4, and the tail end of the locking screw 7 is connected to the slider 53 located in the internal space, that is, the slider 53 has a screw hole corresponding to the slide groove 43, and the screw hole cooperates with the locking screw 7. At this time, it is possible to set or not set a baffle 44 on the blocking cover 4.

[0073] To sum up, the micro-speaker provided by the present invention has a novel structure and can adjust the air discharge area, so that the micro-speaker can meet a variety of different application requirements, improve the versatility of the micro-speaker itself, and help reduce the design cost and mold opening cost of the micro-speaker.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include basin rack; A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a magnetic assembly disposed on the yoke, the magnetic assembly forming a magnetic gap; a vibration assembly, the vibration assembly comprising a diaphragm assembly and a voice coil, the diaphragm assembly connecting the basin frame and the voice coil, the voice coil being arranged corresponding to the magnetic gap; A retaining cover, the retaining cover is connected to the basin frame and the yoke respectively, the retaining cover has a surrounding edge, the surrounding edge is provided with an air leakage hole, and the retaining cover is provided with a sliding groove; A shielding assembly, the shielding assembly comprising a winding shaft, a rolling curtain and a slider, the slider being slidably arranged along the slide groove, one end of the rolling curtain being connected to the slider, and the other end of the rolling curtain being wound on the winding shaft; The basin frame, magnetic circuit assembly, diaphragm assembly and cover together form an internal space, and the internal space is connected to the outside world through the air leakage hole. The roller shutter is used to cover the air leakage hole to adjust the total area of ​​the air leakage hole connected to the outside world.

2. The micro-speaker according to claim 1, wherein The winding shaft and the roller blind are located in the internal space, and the winding shaft is connected to the blocking cover and / or the basin frame.

3. The micro-speaker according to claim 2, wherein: The reel is an elastic reeling mechanism, the reel is rotatably connected to the blocking cover and / or the basin frame, the slider contacts the blocking cover, and the static friction between the slider and the blocking cover is greater than the reeling force of the reel.

4. The micro-speaker according to claim 3, wherein: The shielding assembly further includes a locking screw, the head of which is exposed outside the blocking cover, the tail end of which is connected to the slider, and the slider is located in the internal space.

5. The micro-speaker according to claim 3, wherein: The blocking cover is provided with a baffle, which is located in the internal space and corresponding to the sliding groove. The sliding block has a friction surface for contacting the baffle, and a partial area of ​​the sliding block extends into the sliding groove.

6. The micro-speaker according to claim 5, wherein: The slider is provided with a friction pad, and the friction surface of the slider indirectly contacts the baffle through the friction pad.

7. The micro-speaker according to claim 1, wherein: The rolling curtain is arranged close to the surrounding edge.

8. The micro-speaker according to claim 1, wherein: The outer surface of the blocking cover is provided with a scale mark arranged close to the sliding groove.

9. The micro-speaker according to claim 1, wherein: The two ends of the blocking cover are respectively provided with the surrounding edges, and the number of the shielding components is two groups, and the two groups of shielding components are respectively arranged close to the two ends of the blocking cover.

10. The micro-speaker according to claim 1, wherein There are multiple air leakage holes.

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