Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a vibration assembly, a magnetic circuit assembly and a temperature sensor, and is characterized in that the vibration assembly comprises a diaphragm assembly and a voice coil, and the diaphragm assembly is respectively connected with the voice coil and the frame; the magnetic circuit assembly is connected with the basin frame, the magnetic circuit assembly is provided with a magnetic gap for the voice coil to move, and the magnetic circuit assembly comprises a yoke; the temperature sensor comprises a main body and an infrared temperature measurement probe which are connected, the main body is arranged on the bottom surface of the yoke, and the infrared temperature measurement probe extends into the magnetic gap and faces the voice coil. The miniature loudspeaker has a temperature detection function, and the infrared temperature measurement probe can detect the temperature of the voice coil in real time or regularly, thereby facilitating the subsequent temperature regulation and control of the miniature loudspeaker, preventing the miniature loudspeaker from being in a high-temperature working condition for a long time, and facilitating the prolonging of the service life of the miniature loudspeaker.

Description

Technical Field

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

[0002] Micro speakers are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. With the rapid development of these portable electronic devices, people have increasingly higher requirements for the micro speakers used in them. Large-amplitude speakers or ultra-linear speakers are becoming more and more popular in micro speakers. The amplitude of micro speakers has gradually increased from the original 0.2mm to over 0.65mm. The larger amplitude will generate more heat, resulting in a more serious temperature increase in the micro speakers. Micro speakers are extremely prone to damage when working in high-temperature environments for a long time, which greatly shortens their service life. Therefore, it is necessary to monitor the operating temperature of the micro speakers so that the working conditions of the micro speakers can be adjusted. However, the micro speakers in the existing technology do not have a temperature monitoring function. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a miniature loudspeaker with a temperature monitoring function.

[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 vibration assembly, the vibration assembly comprising a diaphragm assembly and a voice coil, the diaphragm assembly being connected to the voice coil and the basin frame respectively;

[0007] a magnetic circuit assembly connected to the basin frame, the magnetic circuit assembly having a magnetic gap for the voice coil to move, and the magnetic circuit assembly including a yoke;

[0008] The temperature sensor includes a main body and an infrared temperature measuring probe connected to each other. The main body is arranged on the bottom surface of the yoke, and the infrared temperature measuring probe extends into the magnetic gap and faces the voice coil.

[0009] In one embodiment, a mounting hole for mounting the infrared temperature measuring probe is provided on the yoke, and the mounting hole is connected to the magnetic gap.

[0010] In one embodiment, a bottom surface of the yoke is provided with a mounting groove for mounting the main body.

[0011] In one embodiment, the depth of the mounting groove is greater than or equal to the thickness of the main body.

[0012] In one embodiment, the temperature sensor further includes a transmission line, the transmission line connects the infrared temperature measurement probe and the main body, a wire groove communicating the mounting hole and the mounting groove is provided on the bottom surface of the yoke, and the transmission line is located in the wire groove.

[0013] In one embodiment, the depth of the wire groove is greater than or equal to the thickness of the transmission line.

[0014] In one embodiment, the mounting groove is located at the center of the bottom surface of the yoke.

[0015] In one embodiment, a sealing sleeve is further provided at the mounting hole, and the sealing sleeve is sleeved on the infrared temperature measurement probe.

[0016] The beneficial effects of the present utility model are as follows: The present micro speaker has a temperature detection function, and the infrared temperature measurement probe can detect the temperature of the voice coil in real time or at regular intervals, so as to facilitate subsequent temperature regulation of the micro speaker, avoid the micro speaker from being in a high temperature working condition for a long time, and is beneficial to extending the service life of the micro speaker. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the overall structure of the micro speaker according to Embodiment 1 of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of a partial structure of the micro speaker according to Embodiment 1 of the present utility model.

[0020] Explanation of the reference numerals in the drawings:

[0021] 1. Frame;

[0022] 2. Voice coil;

[0023] 3. Magnetic circuit assembly; 31. Yoke; 311. Mounting hole; 312. Mounting groove; 313. Wire groove; 32. Central magnetic structure; 33. Edge magnetic structure;

[0024] 4. Temperature sensor; 41. Main body; 42. Infrared temperature measurement probe; 43. Transmission line. Detailed Description of the Embodiments

[0025] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings.

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0027] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0029] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes solution A, or solution B, or the solution that satisfies both A and B simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0030] In this application, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0031] Embodiment 1

[0032] Please refer to Figure 1 and Figure 2, Embodiment 1 of the present utility model is: a micro speaker, including a chassis 1, a vibration assembly, a magnetic circuit assembly 3 and a temperature sensor 4. The vibration assembly includes a diaphragm assembly and a voice coil 2. The diaphragm assembly is respectively connected to the voice coil 2 and the chassis 1;

[0033] The magnetic circuit assembly 3 is connected to the chassis 1. The magnetic circuit assembly 3 has a magnetic gap for the voice coil 2 to move. Specifically, the magnetic circuit assembly 3 includes a yoke 31, a central magnetic structure 32 and a side magnetic structure 33 respectively provided on the yoke 31. A magnetic gap is formed between the central magnetic structure 32 and the side magnetic structure 33. The side magnetic structure 33 is fixedly connected to the chassis 1. In this embodiment, the side magnetic structure 33 includes a side magnet and a side washer. The side magnet connects the side washer and the yoke 31. The central magnetic structure 32 includes a central magnet and a central washer. The central magnet connects the central washer and the yoke 31. In an actual product, a flange formed by bending a partial area of the yoke 31 can be used to replace all or part of the side magnetic structure 33;

[0034] The temperature sensor 4 includes a main body 41 and an infrared temperature measurement probe 42 connected to each other. The main body 41 is provided on the bottom surface of the yoke 31. The infrared temperature measurement probe 42 extends into the magnetic gap and faces the voice coil 2.

[0035] Preferably, the infrared temperature measurement probe 42 is located directly below the voice coil 2. In this embodiment, the infrared temperature measurement probe 42 is arranged corresponding to the corner of the voice coil 2. In other embodiments, the infrared temperature measurement probe 42 can also be arranged corresponding to the long side or the short side of the voice coil 2.

[0036] The yoke 31 is provided with a mounting hole 311 for mounting the infrared temperature measurement probe 42. The mounting hole 311 communicates with the magnetic gap.

[0037] To facilitate the positioning and installation of the main body 41, the bottom surface of the yoke 31 is provided with a mounting groove 312 for mounting the main body 41. To make the micro speaker keep thin and light, the depth of the mounting groove 312 is greater than or equal to the thickness of the main body 41. In an actual product, it is also possible that the depth of the mounting groove 312 is less than the thickness of the main body 41.

[0038] The temperature sensor 4 further includes a transmission line 43. The transmission line 43 connects the infrared temperature measurement probe 42 and the main body 41. A wire groove 313 communicating the mounting hole 311 and the mounting groove 312 is provided on the bottom surface of the yoke 31. The transmission line 43 is located in the wire groove 313. Preferably, the depth of the wire groove 313 is greater than or equal to the thickness of the transmission line 43, so as to avoid the transmission line 43 occupying the thickness space of the micro speaker and causing the thickness of the micro speaker to become thicker. In other embodiments, it is also acceptable that the thickness of the transmission line 43 is greater than the depth of the wire groove 313. It should be noted that when the cross section of the transmission line 43 is circular, the thickness of the transmission line 43 is equal to its diameter.

[0039] Due to the low magnetic utilization rate in the central region of the magnetic circuit assembly 3, in this embodiment, the mounting groove 312 is located at the center of the bottom surface of the yoke 31. Arranging the mounting groove 312 at the center of the bottom surface of the yoke 31 can also balance the center of gravity of the micro speaker.

[0040] To ensure the airtightness of the micro speaker, optionally, the micro speaker further includes a sealing sleeve provided at the mounting hole 311. The sealing sleeve is sleeved on the infrared temperature measurement probe 42. The material of the sealing sleeve can be selected as silicone, etc. In actual products, a sealing glue can also be used to replace the sealing sleeve.

[0041] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: Comprising Basket frame; Vibration assembly, the vibration assembly includes a diaphragm assembly and a voice coil, the diaphragm assembly is respectively connected to the voice coil and the basket frame; Magnetic circuit assembly, the magnetic circuit assembly is connected to the basket frame, the magnetic circuit assembly has a magnetic gap for the voice coil to move, and the magnetic circuit assembly includes a yoke; Temperature sensor, the temperature sensor includes a main body and an infrared temperature measurement probe connected to each other, the main body is arranged on the bottom surface of the yoke, and the infrared temperature measurement probe extends into the magnetic gap and faces the voice coil.

2. The micro-speaker according to claim 1, wherein: The yoke is provided with a mounting hole for mounting the infrared temperature measurement probe, and the mounting hole communicates with the magnetic gap.

3. The micro speaker according to claim 2, wherein: The bottom surface of the yoke is provided with a mounting groove for mounting the main body.

4. The micro speaker according to claim 3, wherein: The depth of the mounting groove is greater than or equal to the thickness of the main body.

5. The micro-speaker according to claim 3, wherein: The temperature sensor further includes a transmission line, the transmission line connects the infrared temperature measurement probe and the main body, and the bottom surface of the yoke is provided with a wire groove communicating the mounting hole and the mounting groove, and the transmission line is located in the wire groove.

6. The micro speaker according to claim 5, characterized in that: The depth of the wire groove is greater than or equal to the thickness of the transmission line.

7. The micro speaker according to claim 3, characterized in that: The mounting groove is located at the center of the bottom surface of the yoke.

8. The micro speaker according to claim 2, characterized in that: It further includes a sealing sleeve arranged at the mounting hole, and the sealing sleeve is sleeved on the infrared temperature measurement probe.

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