Loudspeaker capable of limiting voice coil

Abstract

The utility model provides a loudspeaker capable of limiting a voice coil, which comprises T iron, a voice coil sleeved on the T iron in a sliding manner or a voice coil arranged in the T iron in a sliding manner, an accommodating groove outside the T iron or in the T iron for the voice coil to jump, a damper arranged between the T iron and the lower end part of the voice coil, one end of the damper connected with the voice coil, and the other end of the damper connected with the T iron. When the damper is at the maximum elongation, the lower end of the voice coil is located in the accommodating groove. The loudspeaker is simple in structure, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of audio, and particularly relates to a loudspeaker with a limited voice coil. Background Art

[0002] With the continuous development of social economy, the scenarios of using audio devices are becoming more and more frequent, and the requirements for audio devices are also getting higher and higher. As an important part of audio devices, the voice coil is an important component in a loudspeaker. When the loudspeaker works, the voice coil, as a current-carrying conductor, is placed in a magnetic field. When current flows through the voice coil, a magnetic field will be generated around it. This magnetic field interacts with the magnetic field of the permanent magnet of the loudspeaker, causing the voice coil to move along the axial direction, driving the diaphragm to move and then generate sound. Therefore, the movement of the voice coil in the magnetic field directly affects the sound output of the speaker. Furthermore, it is necessary to control the vibration range of the voice coil so that it vibrates in the strongest magnetic induction line, thereby enhancing the sensitivity of the speaker and improving the sound quality of the speaker.

[0003] For example, in the patent document with the patent application number 202323302478.3 and the publication date of July 30, 2024, a high-foot elastic wave ultra-thin speaker is disclosed, which includes a chassis. A magnetic circuit system and a vibration system are arranged inside the chassis; the vibration system includes a diaphragm, a voice coil, and an elastic wave. The voice coil is connected to the diaphragm and is located inside the magnetic circuit system. The elastic wave includes an elastic wave body and an elastic foot. The outer side of the elastic wave body is connected to the chassis, and the elastic foot extends upward from the inner side of the elastic wave body and is connected to the diaphragm. In the high-foot elastic wave ultra-thin speaker of this application, the elastic wave includes an elastic wave body and an elastic foot. The elastic foot extends upward from the inner side of the elastic wave body. By connecting the outer side of the elastic wave body to the chassis and connecting the elastic foot to the diaphragm, the elastic wave no longer needs to be connected to the voice coil. In this way, the elastic wave can also play a good role in fixing the vibration system and ensuring that the vibration system remains in the correct position during movement. It also helps to save space, reduce the overall thickness of the speaker, and improve the space utilization rate of the speaker.

[0004] In the above document, the voice coil is connected to the diaphragm, the outer side of the elastic wave body is connected to the chassis, and the elastic foot is connected to the diaphragm, so that the elastic wave no longer needs to be connected to the voice coil to achieve the limit of the voice coil. During the vibration of the voice coil, the voice coil drives the diaphragm to vibrate, and then the diaphragm vibration drives the displacement of the elastic wave. When the voice coil exceeds the expected vibration range, it is necessary to act on the elastic wave through the diaphragm, and then the elastic wave reacts on the diaphragm, and then the diaphragm limits the voice coil. Due to the large mass of the diaphragm, its inertia is large during vibration and it is difficult to quickly respond to the changes of the voice coil, resulting in the elastic wave being unable to pull the voice coil back to the expected position in time. Therefore, there is a delay in the limit of the voice coil in the above document. Summary of the Invention

[0005] The utility model provides a speaker with a limited voice coil, which can limit the voice coil and prevent the voice coil from jumping out during operation, and has a simple structure and is safe and reliable.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a speaker for limiting a voice coil, comprising a T-iron, a voice coil is sleeved on the T-iron slidingly or a voice coil is provided inside the T-iron, a receiving groove for the voice coil to jump is provided outside the T-iron or inside the T-iron, a spring is provided between the T-iron and the lower end of the voice coil, one end of the spring is connected to the voice coil, and the other end of the spring is connected to the T-iron, and the lower end of the voice coil is located in the receiving groove when the spring is at its maximum extension.

[0007] The above arrangement, by arranging a spring wave between the lower end of the voice coil and the T-iron, limits the maximum displacement position of the voice coil, prevents the voice coil from jumping out, and also prevents the voice coil from deviating from the center when subjected to force, thereby preventing sound quality distortion, and the spring wave can ensure the stable movement of the voice coil. The utility model has a simple structure and is safe and reliable.

[0008] Furthermore, the wave spring includes a wave spring body and a second spring foot, and one end of the wave spring body is connected to the second spring foot.

[0009] In the above configuration, the second elastic foot is used to connect with the T-iron. By providing the second elastic foot, the connection surface between the elastic wave and the T-iron can be enlarged, thereby improving the connection strength between the elastic wave and the T-iron.

[0010] Furthermore, the other end of the spider body is connected to a first spring foot. In this structure, the first spring foot is used to connect with the voice coil. By providing the first spring foot, the connection surface between the spider and the voice coil can be enlarged, and the connection strength can be improved.

[0011] Furthermore, the first spring foot is connected to one side of the voice coil, the second spring foot is connected to one side of the T-iron, and the elastic wave body and the bottom of the T-iron are arranged horizontally.

[0012] The above arrangement ensures a firm connection between the elastic wave and the T-iron through the second elastic foot and the T-iron connection. When the voice coil moves, the elastic wave body and the bottom of the T-iron are arranged horizontally to ensure that the voice coil does not contact other parts of the speaker. The elastic wave body can be extended to a length that prevents the voice coil from exceeding its maximum displacement position in the vertical direction, thereby preventing the voice coil from jumping out.

[0013] Furthermore, the first spring foot is connected to the bottom of the voice coil, the second spring foot is connected to the bottom of the T-iron, and the elastic wave body and the bottom of the T-iron are vertically arranged.

[0014] In the above arrangement, the second spring foot is connected to the bottom of the T-iron, so that the spring can be firmly set at the bottom of the T-iron, the spring body is vertically set to the bottom of the T-iron, and the spring body can extend to a length less than the maximum displacement of the voice coil in the vertical direction, so that the voice coil will not jump out and can effectively reciprocate in the magnetic circuit.

[0015] Further, the first spring foot is connected to the voice coil, the second spring foot is connected to the bottom of the T-iron, and the bobbin body is vertically arranged with respect to the bottom of the T-iron. In this way, the connection strength between the bobbin and the voice coil and the T-iron can be improved.

[0016] Further, an annular groove is provided at the bottom of the T-iron, and the second spring foot is connected to the bottom of the annular groove. With this structure, by attaching and connecting the bottom surface and the side surface of the annular groove to the second spring foot, the connection strength can be further improved.

[0017] Further, the second spring foot is L-shaped. In this way, one end of the second spring foot is connected to the bobbin body, and the other end of the second spring foot can be attached to the T-iron, increasing the connection surface and having good connection strength.

[0018] Further, the cross-section of the annular groove is U-shaped, and the second spring foot is U-shaped, and the second spring foot is attached to the annular groove. In this way, by connecting three surfaces of the second spring foot to the bottom surface and the side surface of the annular groove, the connection strength is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic diagram of Structural Example 1 of the present utility model.

[0020] Figure 2 FIG. 2 is a schematic diagram of the bobbin structure of the present utility model.

[0021] Figure 3 FIG. 3 is a schematic diagram of the second structure of the bobbin of the present utility model.

[0022] Figure 4 FIG. 4 is a schematic diagram of the third structure of the bobbin of the present utility model.

[0023] Figure 5 FIG. 5 is a schematic diagram of Example 2 in the present utility model.

[0024] Figure 6 FIG. 6 is a schematic diagram of the structure of Embodiment 3 in the present utility model.

[0025] Figure 7 FIG. 7 is a schematic diagram of one of the structures of the connection between the second spring foot and the annular groove.

[0026] Figure 8 FIG. 8 is a schematic diagram of another structure of the connection between the second spring foot and the annular groove.

[0027] Description of the reference numerals in the drawings: 1 - washer; 2 - magnet member; 3 - T-iron; 31 - annular groove; 4 - voice coil; 5 - bobbin; 51 - bobbin body; 52 - first spring foot; 53 - second spring foot; 6 - positioning post. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Embodiment 1.

[0029] As shown Figure 1 in the figure, a loudspeaker with a voice coil restricted includes a T-iron 3 and a washer 1. A magnet part 2 is arranged between the T-iron 3 and the washer 1. In this example, the magnet part 2 is a magnet steel. A positioning post 6 is arranged inside the T-iron. An accommodation groove is formed among the positioning post 6, the T-iron 3, the magnet part 2 and the washer 1. A voice coil 4 is sleeved on the positioning post 6 in a sliding manner. A spider 5 is connected between the lower end of the voice coil 4 and the T-iron 3. The connection between the spider 5 and the voice coil 4 can be by gluing or other fixing methods. The connection between the spider 5 and the T-iron can be by gluing or other fixing methods. When the spider 5 is at the maximum elongation, the lower end of the voice coil is located inside the accommodation groove to prevent the voice coil from jumping out. By arranging the spider 5 between the voice coil 4 and the T-iron 3, the maximum displacement position of the voice coil 4 is restricted, the voice coil 4 is prevented from jumping out, and the voice coil 4 can also be prevented from colliding with the magnet part 2 due to deviation from the center when being stressed, thereby preventing sound quality distortion. Moreover, the spider 5 can ensure the stable movement of the voice coil 4 in the accommodation groove.

[0030] As shown Figure 2 in the figure, the spider 5 includes a spider body 51, a first spider leg 52 and a second spider leg 53. One end of the spider body 51 is connected to the first spider leg 52, and the other end of the spider body 51 is connected to the second spider leg 53. In this example, both the first spider leg 52 and the second spider leg 53 are L-shaped, and the bending directions of the first spider leg 52 and the second spider leg 53 are opposite.

[0031] The first spider leg 52 is connected to one side of the voice coil 4, and the second spider leg 53 is connected to one side of the T-iron 3. Then, through the L-shaped ends, they can directly adhere to the voice coil 4 and the T-iron, thereby increasing the connection area, improving the connection strength, and making the loudspeaker have a long service life. The spider body 51 is horizontally arranged with the bottom of the T-iron 3. In this utility model, the horizontal arrangement means that the a axis passing through the center of the spider is parallel to the horizontal plane, or it can have an angle within 10°.

[0032] By connecting the second spider leg 53 with the T-iron 3, the stable connection between the spider 5 and the T-iron 3 is ensured. When the voice coil 4 moves, the spider body 51 is horizontally arranged with the bottom of the T-iron 3. The extendable length of the spider body 51 enables the voice coil 4 not to exceed its maximum displacement position in the vertical direction, avoiding the voice coil 4 from jumping out.

[0033] Principle of this utility model: By arranging the spider 5 between the voice coil 4 and the T-iron 3, the maximum displacement position of the voice coil 4 is restricted, the voice coil 4 is prevented from jumping out, and the voice coil 4 can also be prevented from colliding with the magnet part 2 due to deviation from the center when being stressed, thereby preventing sound quality distortion. Moreover, the spider 5 can ensure the stable movement of the voice coil 4 in the accommodation groove.

[0034] As shown Figure 3As shown in the figure, another structure of the flexure 5 includes a flexure body 51 and a second leg 53. The second leg 53 is L-shaped, and the connection surface between the flexure and the T-iron can be increased through the L-shaped second leg.

[0035] As Figure 4 shown in the figure, another structure of the flexure 5 includes a flexure body 51.

[0036] Embodiment 2.

[0037] As Figure 5 shown in the figure, a loudspeaker for restricting a voice coil includes a T-iron 3 and a washer 1. A magnet member 2 is provided between the T-iron 3 and the washer 1. In this example, the magnet member 2 is a magnetic steel. A positioning post 6 is provided in the T-iron. An accommodation groove is formed among the positioning post 6, the T-iron 3, the magnet member 2, and the washer 1. A voice coil 4 is slidably sleeved on the positioning post 6. A flexure 5 is connected between the bottom surface of the lower end of the voice coil 4 and the T-iron 3. The connection between the flexure 5 and the voice coil 4 can be by gluing or other fixing methods, and the connection between the flexure 5 and the T-iron can be by gluing or other fixing methods. When the flexure 5 is at the maximum elongation, the lower end of the voice coil is located in the accommodation groove to prevent the voice coil from jumping out. By providing the flexure 5 between the voice coil 4 and the T-iron 3, the maximum displacement position of the voice coil 4 is restricted, the voice coil 4 is prevented from jumping out, and the voice coil 4 is also prevented from deviating from the center and colliding with the magnet member 2 when stressed, thereby preventing sound quality distortion, and the flexure 5 can ensure the stable movement of the voice coil 4 in the accommodation groove.

[0038] As Figure 2 shown in the figure, the flexure 5 includes a flexure body 51, a first leg 52, and a second leg 53. One end of the flexure body 51 is connected to the first leg 52, and the other end of the flexure body 51 is connected to the second leg 53. In this example, both the first leg 52 and the second leg 53 are L-shaped, and the bending directions of the first leg 52 and the second leg 53 are opposite. Of course, the bending directions can also be the same.

[0039] The first leg 52 is connected to the bottom surface of the lower end of the voice coil 4, and the second leg 53 is connected to the bottom surface of the T-iron 3. Then, through one end of the L-shape, it can be directly attached to the voice coil 4 and the T-iron, thereby increasing the connection area and improving the connection strength, making the service life of the loudspeaker long. The flexure body 51 is vertically arranged with the bottom of the T-iron 3. In the present utility model, the vertical arrangement means that the a axis passing through the center of the flexure is parallel to the vertical plane, and it can also have an angle within 10°.

[0040] By connecting through the second leg 53 and the T-iron 3, the stable connection between the flexure 5 and the T-iron 3 is ensured. When the voice coil 4 moves, the flexure body 51 is vertically arranged with the side surface of the T-iron 3. The extendable length of the flexure body 51 enables the voice coil 4 not to exceed its maximum displacement position in the vertical direction, preventing the voice coil 4 from jumping out.

[0041] The principle of the utility model is as follows: by arranging a spring wave 5 between the voice coil 4 and the T iron 3, the maximum displacement position of the voice coil 4 is limited to prevent the voice coil 4 from jumping out, and the voice coil 4 can be prevented from colliding with the magnet 2 due to deviation from the center when subjected to force, thereby preventing sound quality distortion, and the spring wave 5 can ensure the stable movement of the voice coil 4 in the accommodating groove.

[0042] like Figure 3 As shown, another structure of the wave damper 5 includes a wave damper body 51 and a second elastic foot 53. The second elastic foot 53 is L-shaped. The L-shaped second elastic foot can increase the connection surface between the wave damper and the T-iron.

[0043] like Figure 4 As shown, another structure of the wave damper 5 includes a wave damper body 51 .

[0044] Example 3.

[0045] like Figure 6 As shown, a speaker for limiting voice coil includes a T-iron 3 and a washer 1, a magnet 2 is arranged between the T-iron 3 and the washer 1, in this example, the magnet 2 is magnetic steel, a positioning column 6 is arranged inside the T-iron, a receiving groove is formed between the positioning column 6 and the T-iron 3, the magnet 2 and the washer 1, an annular groove 31 is arranged at the bottom of the T-iron, in this example, the cross section of the annular groove is U-shaped, a voice coil 4 is slidably sleeved on the positioning column 6, and a spring 5 is connected between the bottom surface of the lower end of the voice coil 4 and the T-iron 3. The connection between the spring 5 and the voice coil 4 can be glued or other fixing methods, and the connection between the spring 5 and the T-iron can be glued or other fixing methods. When the spring 5 is at the maximum extension, the lower end of the voice coil is located in the receiving groove to prevent the voice coil from jumping out. By arranging a spring 5 between the voice coil 4 and the T-iron 3, the maximum displacement position of the voice coil 4 is limited to prevent the voice coil 4 from jumping out, and it can also prevent the voice coil 4 from colliding with the magnet 2 due to deviation from the center when subjected to force, thereby preventing sound quality distortion, and the spring 5 can ensure the stable movement of the voice coil 4 in the accommodating groove.

[0046] like Figure 2 As shown, the wave damper 5 includes a wave damper body 51, a first elastic foot 52 and a second elastic foot 53. One end of the wave damper body 51 is connected to the first elastic foot 52, and the other end of the wave damper body 51 is connected to the second elastic foot 53. In this example, the first elastic foot 52 and the second elastic foot 53 are both L-shaped, and the bending directions of the first elastic foot 52 and the second elastic foot 53 are opposite, but they can also be bent in the same direction.

[0047] The first spring foot 52 is connected to the bottom surface of the lower end of the voice coil 4. Figure 7As shown, the second elastic foot 53 extends into the annular groove 31 so that the two surfaces of the second elastic foot 53 are respectively connected to the bottom surface and a side surface of the annular groove 31, and the bottom surface of the T iron 3 is connected, and then the end of the L shape can be directly attached to the voice coil 4 and the T iron, thereby increasing the connection area, improving the connection strength, and extending the service life of the speaker. The elastic wave body 51 is vertically arranged at the bottom of the T iron 3. In the utility model, the vertical arrangement is such that the a axis passing through the center of the elastic wave is parallel to the vertical plane, and can also have an angle within 10°.

[0048] The second spring foot 53 and the T-iron 3 are connected to ensure a stable connection between the spring 5 and the T-iron 3. When the voice coil 4 moves, the spring body 51 and the side of the T-iron 3 are vertically arranged. The spring body 51 can be extended to a length that prevents the voice coil 4 from exceeding its maximum displacement position in the vertical direction, thereby preventing the voice coil 4 from jumping out.

[0049] The principle of the utility model is as follows: by arranging a spring wave 5 between the voice coil 4 and the T iron 3, the maximum displacement position of the voice coil 4 is limited to prevent the voice coil 4 from jumping out, and the voice coil 4 can be prevented from colliding with the magnet 2 due to deviation from the center when subjected to force, thereby preventing sound quality distortion, and the spring wave 5 can ensure the stable movement of the voice coil 4 in the accommodating groove.

[0050] like Figure 3 As shown, another structure of the wave damper 5 includes a wave damper body 51 and a second elastic foot 53. The second elastic foot 53 is L-shaped. The L-shaped second elastic foot can increase the connection surface between the wave damper and the T-iron.

[0051] Of course, if Figure 8 As shown, the second elastic foot 53 can also be U-shaped, so that the three surfaces of the second single foot are connected to the bottom surface and two side surfaces of the annular groove 31, so that the strength of the connection is better.

[0052] like Figure 3 As shown, the second elastic foot 53 is connected to the bottom of the T-iron 3, so that the elastic wave 5 can be firmly set at the bottom of the T-iron 3, the elastic wave body 51 is vertically set to the bottom of the T-iron 3, and the elastic wave body 51 can extend to a length less than the maximum displacement of the voice coil 4 in the vertical direction, so that the voice coil 4 will not jump out of the magnetic circuit and can effectively reciprocate in the magnetic circuit. A groove 31 is provided at the bottom of the T-iron 3, the first elastic foot 52 is connected to the bottom of the voice coil 4, the second elastic foot 53 is connected to the bottom of the T-iron 3 connecting block, and the elastic wave body 51 is vertically set to the bottom of the T-iron 3.

[0053] Embodiment three.

[0054] like Figure 4As shown, by providing a groove 31 at the bottom of the T-iron 3, precise positioning is provided for the setting of the flexure 5. The second flexure foot 53 of the flexure 5 is set at the bottom of the groove 31, so that a firm connection is achieved between the flexure 5 and the T-iron 3. Moreover, the extendable length of the flexure body 51 is less than the maximum moving distance of the voice coil 4 in the vertical direction, ensuring that the voice coil 4 does not break away from the magnetic circuit, and thus enabling effective reciprocating motion within the magnetic circuit. Embodiment 4.

[0055] As Figure 5 shown, the first flexure foot 52 is connected to the bottom of the voice coil 4, the second flexure foot 53 is connected to the upper surface of the groove 31, and the flexure body 51 is vertically arranged with respect to the bottom of the T-iron 3. A groove 31 is provided on the T-iron 3. After the second flexure foot 53 is connected to one side surface of the groove 31, it is then connected to the surface of the groove 31, and then the second flexure foot 53 is connected to the other side surface of the groove 31. The connection area between the second flexure foot 53 and the groove 31 is increased, so that the flexure 5 can be firmly set in the groove 31. Moreover, the extendable length of the flexure body 51 is less than the maximum moving distance of the voice coil 4 in the vertical direction, ensuring that the voice coil 4 does not break away from the magnetic circuit.

[0056] Embodiment 4.

[0057] As Figure 6 shown, the first flexure foot 52 is connected to the bottom of the voice coil 4, the second flexure foot 53 is connected to the side surface of the groove 31, and the flexure body 51 is vertically arranged with respect to the bottom of the T-iron 3. By providing a groove 31 at the bottom of the T-iron 3 and fixing the second flexure foot 53 of the flexure in one side surface of the groove 31, a stable connection between the flexure 5 and the T-iron 3 is achieved. At the same time, the extendable length of the flexure body 51 is limited within the maximum vertical displacement of the voice coil 4, ensuring that the voice coil 4 is always located inside the magnetic circuit.

Claims

1. A loudspeaker with a voice coil limitation, comprising a T-iron, a voice coil sleeved to slide on the T-iron or a voice coil provided to slide inside the T-iron, and a receiving groove for the voice coil to jump is provided outside or inside the T-iron, and it is characterized in that: A suspension is provided between the lower end of the T-iron and the voice coil. One end of the suspension is connected to the voice coil, and the other end of the suspension is connected to the T-iron. When the suspension is at its maximum elongation, the lower end of the voice coil is located within the receiving groove.

2. The loudspeaker with a voice coil limitation according to claim 1, characterized in that: The suspension includes a suspension body and a second elastic leg. One end of the suspension body is connected to the second elastic leg.

3. The loudspeaker with a voice coil limit according to claim 2, wherein: The other end of the suspension body is connected with a first elastic leg.

4. The loudspeaker with a voice coil limit according to claim 3, characterized in that: The first elastic leg is connected to one side of the voice coil, the second elastic leg is connected to one side of the T-iron, and the suspension body is horizontally arranged with respect to the bottom of the T-iron.

5. The loudspeaker with a voice coil limitation according to claim 2, characterized in that: The second elastic leg is connected to the bottom of the T-iron, and the suspension body is vertically arranged with respect to the bottom of the T-iron.

6. The loudspeaker with a voice coil limit according to claim 3, characterized in that: The first elastic leg is connected to the voice coil, the second elastic leg is connected to the bottom of the T-iron, and the suspension body is vertically arranged with respect to the bottom of the T-iron.

7. A loudspeaker with a restricted voice coil according to claim 4 or 5, characterized in that: An annular groove is provided at the bottom of the T-iron, and the second elastic leg is connected to the bottom of the annular groove.

8. A loudspeaker with a restricted voice coil according to claim 7, characterized in that: The second elastic leg is L-shaped.

9. The loudspeaker with a voice coil limit according to claim 7, characterized in that: The cross-section of the annular groove is U-shaped, the second elastic leg is U-shaped, and the second elastic leg is attached to the annular groove.

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