Voice coil framework and loudspeaker

Abstract

The invention relates to the technical field of loudspeakers, and particularly discloses a voice coil framework and a loudspeaker. The voice coil framework comprises a framework main body and a bending wall which is arranged at one end of the framework main body and is formed by bending, the bending wall is used for being bonded with a paper cone of a loudspeaker, and a plurality of stress unloading holes are formed in the bending wall in the circumferential direction of the bending wall. The voice coil framework is directly bonded with the paper cone through the bending wall, so that the contact area between the voice coil framework and the paper cone is increased, a glue reserved gap between the voice coil framework and the paper cone is eliminated, the additional torque between the voice coil framework and the paper cone is further reduced, and the active power of the voice coil framework to the paper cone is increased; according to the loudspeaker, the stress unloading holes are formed in the bending wall, so that the stress concentration phenomenon of the bending wall at the bending position is reduced, the service life of the loudspeaker is further prolonged, and the sound production effect of the loudspeaker is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a voice coil frame and a loudspeaker. Background Art

[0002] like Figure 1 As shown, a conventional loudspeaker generally includes a vibration system and a magnetic circuit system 1'. The vibration system includes a voice coil frame 2', a voice coil 3', a paper cone 4', a dust cover 5', a folded ring 6', etc. When the voice coil 3' is energized, a magnetic field is generated. The magnetic field interacts with the magnetic circuit system 1' to generate an Ampere force with a certain frequency. The Ampere force is transmitted to the paper cone 4' and the folded ring 6' through the voice coil frame 2', causing the paper cone 4', the folded ring 6' and the dust cover 5' to vibrate up and down, thereby generating a sound with a certain frequency.

[0003] like Figure 2 As shown in FIG. 1 , the paper cone 4' and the voice coil frame 2' are generally bonded by a colloid 7'. Since the voice coil frame 2' is mostly a cylindrical structure, after the side wall of the cylindrical structure is bonded to the paper cone 4' by the colloid 7', the contact area between the paper cone 4' and the voice coil frame 2' of the cylindrical structure is small. On the one hand, the connection strength between the paper cone 4' and the voice coil frame 2' is not high, resulting in unstable force transmission between the voice coil frame 2' and the paper cone 4'. In addition, the paper cone 4' and the voice coil frame 2' need to be pre-bonded by the colloid 7'. Leaving a gap for applying the colloid 7' will cause additional torque to be generated in the force transmission between the paper cone 4' and the voice coil frame 2', affecting the sensitivity of the speaker; on the other hand, it will make the bonding between the paper cone 4' and the voice coil frame 2' more difficult, and the uniformity of the colloid 7' is difficult to ensure, resulting in a low yield rate of the product; on still another hand, stress concentration will easily occur at the bonding point between the paper cone 4' and the voice coil frame 2', causing the voice coil frame 2' to be easily deformed or fatigue damaged, which will not only reduce the service life of the speaker, but also affect the sound effect of the speaker.

[0004] Therefore, it is urgent to provide a voice coil frame and a loudspeaker to solve the above technical problems. Summary of the invention

[0005] According to one aspect of the present invention, the present invention provides a voice coil skeleton, which is bonded to a paper cone through a bending wall, thereby increasing the contact area between the voice coil skeleton and the paper cone, eliminating the glue reserved gap between the voice coil skeleton and the paper cone, and increasing the active power of the voice coil skeleton to the paper cone; and a stress unloading hole is arranged on the bending wall, thereby reducing the stress concentration phenomenon of the bending wall, thereby extending the service life of the speaker and enhancing the sound effect of the speaker.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The voice coil frame comprises a frame body and a bending wall which is arranged at one end of the frame body and formed by bending. The bending wall is used to bond with the paper cone of the speaker. A plurality of stress unloading holes are arranged on the bending wall along the circumference of the bending wall.

[0008] Optionally, an arc-shaped transition section is provided between the skeleton body and the bending wall.

[0009] Optionally, the diameter D of the stress unloading hole is 1 / 4 to 1 / 2 times the width a of the bending wall.

[0010] Optionally, the shortest distance c between the stress unloading hole and the end of the bending wall is 1 / 4 to 2 / 3 times the width a of the bending wall.

[0011] Optionally, a plurality of the stress unloading holes are arranged at intervals of 30° to 60° along the circumferential direction of the bending wall.

[0012] Optionally, the bending wall is plate-shaped or curved.

[0013] Optionally, the bending wall is in a convex shape, an outwardly flared trumpet shape or a flat-top shape; and / or the cross-section of the skeleton body is polygonal or circular.

[0014] According to another aspect of the present invention, the present invention further provides a loudspeaker, comprising a paper cone and a voice coil frame as described in any one of the above technical solutions, wherein the bending wall of the voice coil frame is bonded to the paper cone.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a voice coil frame, comprising a frame body and a bending wall arranged at one end of the frame body and formed by bending. The voice coil frame is bonded to the paper cone of the speaker through the bending wall. Compared with the prior art in which the paper cone of the speaker is directly bonded to the side wall of the voice coil frame in the vertical direction, the contact area between the voice coil frame and the paper cone is increased, making the bonding process between the paper cone and the voice coil frame easier, improving the uniformity, stability and firmness of the bonding between the paper cone and the voice coil frame, which is beneficial to improving the production yield of the speaker; and it can make the force transmission between the voice coil frame and the paper cone more stable, increase the transmission efficiency and sensitivity of the Ampere force, and further help improve the sound effect of the speaker.

[0017] In addition, a plurality of stress unloading holes are provided in the circumferential direction of the bending wall, and the stress unloading holes disperse the stress at the bending point between the bending wall and the frame body, thereby improving the deformation resistance of the voice coil frame, which is beneficial to prolonging the service life of the speaker.

[0018] The bending wall is formed by bending, which, on the one hand, is easy to process; on the other hand, the bending wall and the skeleton body are an integrated structure, which is beneficial to ensure the force transmission stability of the voice coil skeleton.

[0019] The present invention also provides a loudspeaker, comprising a paper cone and the above-mentioned voice coil frame. The loudspeaker has a better sounding effect and a longer service life due to the use of the above-mentioned voice coil frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a loudspeaker in the prior art;

[0021] Figure 2 for Figure 1 A magnified view at point A;

[0022] Figure 3 A cross-sectional view of a loudspeaker provided by an embodiment of the present invention;

[0023] Figure 4 for Figure 3 Enlarged view at B;

[0024] Figure 5 A schematic diagram of the structure of a voice coil skeleton provided by an embodiment of the present invention;

[0025] Figure 6 A partial schematic diagram of a cross-sectional view of a voice coil bobbin provided in an embodiment of the present invention.

[0026] Figure 1-Figure 2 middle:

[0027] 1', magnetic circuit system; 2', voice coil frame; 3', voice coil; 4', paper cone; 5', dust cover; 6', folding ring; 7', colloid;

[0028] Figure 3-Figure 6 middle:

[0029] 100, voice coil frame; 110, frame body; 120, bending wall; 130, stress unloading hole; 140, arc-shaped transition section;

[0030] 200, paper basin;

[0031] 300. Colloid. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] like Figure 1 and Figure 2 As shown, a loudspeaker generally includes a vibration system and a magnetic circuit system 1'. The vibration system includes a voice coil frame 2', a voice coil 3', a paper cone 4', a dust cover 5', a folded ring 6', etc. When the voice coil 3' is energized, a magnetic field is generated. The magnetic field interacts with the magnetic circuit system 1' to generate an Ampere force with a certain frequency. The Ampere force is transmitted to the paper cone 4' and the folded ring 6' through the voice coil frame 2', causing the paper cone 4', the folded ring 6' and the dust cover 5' to vibrate up and down, thereby generating a sound with a certain frequency.

[0037] In the prior art, the paper cone 4' and the voice coil frame 2' are generally bonded by a colloid 7'. Since the voice coil frame 2' is mostly a cylindrical structure, after the side wall of the cylindrical structure is bonded to the paper cone 4' by the colloid 7', the contact area between the paper cone 4' and the cylindrical voice coil frame 2' is small. On the one hand, the connection strength between the paper cone 4' and the voice coil frame 2' is not high, resulting in unstable force transmission between the voice coil frame 2' and the paper cone 4'. In addition, when the paper cone 4' and the voice coil frame 2' are bonded by the colloid 7', it is necessary to The gap reserved for applying the colloid 7' will cause additional torque in the force transmission between the paper cone 4' and the voice coil frame 2', affecting the sensitivity of the speaker; on the other hand, it will make the bonding between the paper cone 4' and the voice coil frame 2' more difficult, and the uniformity of the colloid 7' is difficult to ensure, resulting in a low yield rate of the product; on the other hand, the glue bonding point between the paper cone 4' and the voice coil frame 2' will easily produce stress concentration, causing the voice coil frame 2' to be easily deformed or fatigue damaged, which not only reduces the service life of the speaker, but also affects the sound effect of the speaker.

[0038] Based on the above problems, the present embodiment provides a voice coil skeleton, which is bonded to the paper cone through a bending wall, thereby increasing the contact area between the voice coil skeleton and the paper cone, eliminating the glue reserved gap between the voice coil skeleton and the paper cone, and increasing the active power of the voice coil skeleton to the paper cone; and, a stress unloading hole is provided on the bending wall, which reduces the stress concentration phenomenon of the bending wall, thereby extending the service life of the speaker and enhancing the sound effect of the speaker.

[0039] Specifically, Figure 3-Figure 6 As shown, the voice coil frame 100 includes a frame body 110 and a bending wall 120 which is arranged at one end of the frame body 110 and formed by bending. The bending wall 120 is used to bond with the paper cone 200 of the speaker. Along the circumference of the bending wall 120, a plurality of stress unloading holes 130 are provided on the bending wall 120.

[0040] The bending wall 120 of the voice coil bobbin 100 provided in the present embodiment is bonded to the paper cone 200 of the speaker through the colloid 300. Compared with the prior art in which the paper cone 200 of the speaker is directly bonded to the side wall of the voice coil bobbin 100 in the vertical direction, the contact area between the voice coil bobbin 100 and the paper cone 200 is increased. On the one hand, the bonding process between the paper cone 200 and the voice coil bobbin 100 is made easier, and the uniformity, stability and firmness of the bonding between the paper cone 200 and the voice coil bobbin 100 are improved, which is beneficial to improving the production yield of the speaker; on the other hand, the connection strength between the voice coil bobbin 100 and the paper cone 200 is improved, so that the force transmission between the voice coil bobbin 100 and the paper cone 200 is more stable, and the transmission efficiency and sensitivity of the Ampere force are increased, which is beneficial to improving the sound effect of the speaker. In addition, the stress unloading hole 130 on the bending wall 120 disperses the stress at the bending point between the bending wall 120 and the skeleton body 110 , thereby improving the deformation resistance of the voice coil skeleton 100 , which is beneficial to prolonging the service life of the speaker.

[0041] Furthermore, the bending wall 120 is formed by bending, which, on the one hand, facilitates processing; on the other hand, enables the bending wall 120 and the skeleton body 110 to form an integrated structure, which is beneficial to ensuring the force transmission stability of the voice coil skeleton 100 .

[0042] It is worth noting that, according to experimental verification, the overall frequency response of the loudspeaker using the voice coil bobbin 100 of this embodiment is improved by 1dB-1.5dB compared with the overall frequency response of the loudspeaker in the above-mentioned prior art, and the shape of the frequency response curve remains unchanged.

[0043] It is understandable that the bending angle of the bending wall 120 can be designed to be adapted according to the shape of the paper cone 200 .

[0044] Optionally, in one possible embodiment, the angle between the bending wall 120 and the outer side wall of the skeleton body 110 is greater than 180° and less than 270°, and the bending wall 120 is in a convex shape. In another possible embodiment, the angle between the bending wall 120 and the outer side wall of the skeleton body 110 is greater than 90° and less than 180°, and the bending wall 120 is in an outwardly flared trumpet shape ( Figure 5 In other possible embodiments, the angle between the bending wall 120 and the outer side wall of the skeleton body 110 may be 270°, and in this case, the bending wall 120 is flat-topped.

[0045] Optionally, the shape of the skeleton body 110 can also be set according to actual needs, such as the cross-section of the skeleton body 110 is polygonal or circular.

[0046] Optionally, the shape of the bending wall 120 can be designed to match the shape of the paper cone 200. In one possible embodiment, the bending wall 120 is in a plate shape. In another possible embodiment, the bending wall 120 can also be in a curved shape.

[0047] Furthermore, in order to overcome the stress concentration phenomenon at the connection between the bending wall 120 and the skeleton body 110 and improve the fatigue damage resistance of the voice coil skeleton 100 , an arc-shaped transition section 140 is provided between the skeleton body 110 and the bending wall 120 .

[0048] Preferably, if Figure 6 As shown, the radius d of the arc-shaped transition section 140 is 1 / 5 times the thickness e of the skeleton body 110. Such a configuration makes the arc-shaped transition section 140 have a higher strength and a stronger fatigue damage resistance.

[0049] Further, see Figure 6 In a possible embodiment, the diameter D of the stress unloading hole 130 is 1 / 4 to 1 / 2 times the width a of the bending wall 120. With such a configuration, the stress unloading hole 130 has a better effect of dispersing stress, weakens the stress concentration phenomenon on the voice coil frame 100, and further prolongs the service life of the voice coil frame 100.

[0050] Further, see Figure 6 In a possible embodiment, the shortest distance c between the stress unloading hole 130 and the end of the bending wall 120 is 1 / 4 to 2 / 3 times the width a of the bending wall 120. In this way, the stress unloading hole 130 can better unload the stress at the connection between the bending wall 120 and the skeleton body 110.

[0051] In this embodiment, the diameter D of the stress unloading hole 130 is 1 / 2 times the width a of the bending wall 120, and the shortest distance c between the stress unloading hole 130 and the end of the bending wall 120 is 1 / 2 times the width a of the bending wall 120. It has been found through research that such a configuration can reduce 60% of the stress concentration at the connection between the bending wall 120 and the voice coil bobbin 100, so that the stress can be evenly distributed on the bending wall 120.

[0052] Furthermore, in this embodiment, a plurality of stress unloading holes 130 are arranged at intervals of 30° to 60° along the circumference of the bending wall 120. Such an arrangement can improve the uniformity of stress distribution on the bending wall 120, thereby reducing the risk of fracture of the bending wall 120 and extending the service life of the voice coil frame 100.

[0053] For example, the plurality of stress unloading holes 130 may be arranged at intervals of 30° along the circumference of the bending wall 120, in which case, there are 12 stress unloading holes 130. The plurality of stress unloading holes 130 may also be arranged at intervals of 40° along the circumference of the bending wall 120, in which case, there are 9 stress unloading holes 130. The plurality of stress unloading holes 130 may also be arranged at intervals of 60° along the circumference of the bending wall 120, in which case, there are 6 stress unloading holes 130.

[0054] like Figure 3 As shown, this embodiment further provides a loudspeaker, comprising a paper cone 200 and the above-mentioned voice coil bobbin 100 , wherein the bending wall 120 of the voice coil bobbin 100 is bonded to the paper cone 200 .

[0055] Since the loudspeaker adopts the voice coil frame 100, the sound effect is better and the service life is longer.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A voice coil frame, characterized in that: The invention comprises a skeleton body (110) and a bending wall (120) which is arranged at one end of the skeleton body (110) and formed by bending. The bending wall (120) is used to be bonded to a paper cone (200) of a speaker. A plurality of stress unloading holes (130) are arranged on the bending wall (120) along the circumference of the bending wall (120).

2. The voice coil frame according to claim 1, characterized in that: An arc-shaped transition section (140) is provided between the skeleton body (110) and the bending wall (120).

3. The voice coil frame according to claim 1, characterized in that: The diameter D of the stress unloading hole (130) is 1 / 4 to 1 / 2 times the width a of the bending wall (120).

4. The voice coil frame according to claim 1, characterized in that: The shortest distance c between the stress unloading hole (130) and the end of the bending wall (120) is 1 / 4 to 2 / 3 times the width a of the bending wall (120).

5. The voice coil frame according to claim 1, characterized in that: The plurality of stress unloading holes (130) are arranged at intervals of 30° to 60° along the circumferential direction of the bending wall (120).

6. The voice coil frame according to any one of claims 1 to 5, characterized in that: The bent wall (120) is plate-shaped or curved.

7. The voice coil frame according to any one of claims 1 to 5, characterized in that: The bending wall (120) is in a convex shape, an outwardly flared trumpet shape or a flat-top shape; and / or the cross section of the skeleton body (110) is in a polygonal or circular shape.

8. A loudspeaker, characterized in that It comprises a paper cone (200) and a voice coil frame (100) according to any one of claims 1 to 7, wherein a bending wall (120) of the voice coil frame (100) is bonded to the paper cone (200).

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