Coaxial high-pitch center pillar structure and sound box

Abstract

The coaxial high-pitch center pillar structure comprises a center pillar which comprises a pillar body, a cavity arranged in the pillar body, a mounting cavity which is arranged at the end part of the pillar body and is communicated with the cavity and the outside, and a first connecting hole which is arranged at the other end of the pillar body and is communicated with the cavity and the outside; the connecting piece is detachably connected with the middle column; the waveguide tube is arranged on the connecting piece; the voice diaphragm is arranged between the waveguide tube and the connecting piece and covers the opening of the mounting cavity; and the U-shaped iron is located in the mounting cavity, and a second connecting hole which is arranged towards the direction of the first connecting hole and is coaxial with the first connecting hole is formed in the U-shaped iron. According to the coaxial high-pitch center pillar structure provided by the utility model, the traditional solid center pillar is changed into the hollow center pillar with the cavity and the mounting cavity, and the novel hollow center pillar is adopted, so that the Fs (Frameworks) of the high pitch is reduced to 850Hz from the conventional 1400-1500Hz; dC offset is avoided, and distortion is reduced.

Description

Technical Field

[0001] The utility model relates to the field of sound boxes, in particular to a center column structure of a coaxial tweeter and a sound box. Background Art

[0002] The function of the conventional coaxial tweeter center column is to connect the treble and bass to keep them in the correct position. The existing coaxial speaker tweeter center column only has the function of supporting and is locked on the back by screws. Due to volume limitations, the traditional tweeter center column can only be installed with a conventional tweeter. The back structure of the tweeter is compact and the f0 resonance frequency is relatively high. For example, the 25-core is generally at 1500Hz and the 20-core is around 2000Hz. Under high power, the voice coil position will be offset, resulting in increased distortion, reduced power carrying capacity, and even burning in severe cases. With the iterative evolution of products, the conventional single-functional design can no longer meet customers' higher requirements for treble sound quality. Utility Model Content

[0003] In order to solve the above problems, the present technical solution provides a center column structure and a speaker box of a coaxial tweeter.

[0004] To achieve the above purpose, the technical solution is as follows:

[0005] The center column structure of the coaxial tweeter includes

[0006] The middle column comprises a column, a cavity provided in the column, a mounting cavity provided at the end of the column and connecting the cavity with the outside, and a first connecting hole provided at the other end of the column and connecting the cavity with the outside;

[0007] A connecting piece, which is detachably connected to the center column;

[0008] A waveguide, which is arranged on the connecting member;

[0009] A sound film, which is arranged between the waveguide and the connecting member and covers the opening of the installation cavity;

[0010] A U-iron is located in the installation cavity, and a second connecting hole is provided on the U-iron, which is arranged in a direction toward the first connecting hole and is coaxial with the first connecting hole.

[0011] As described above, the center column structure of the coaxial tweeter comprises a nut disposed on the column body, and the nut is disposed corresponding to the first connecting hole.

[0012] The center column structure of the coaxial tweeter as described above further includes a support member, which passes through the nut and the first connecting hole in sequence and is threadedly connected to the second connecting hole to support the U-iron suspension to be suspended relative to the installation cavity.

[0013] In the center column structure of the coaxial tweeter as described above, the U-iron is provided with a main magnet, a washer, an auxiliary magnet, and a voice coil stacked in sequence, and the voice coil is sleeved on the outer periphery of the washer and extends toward the sound membrane.

[0014] As described above, in the center column structure of the coaxial tweeter, a pressure relief hole connecting the cavity with the outside is provided on the side wall of the column, and the pressure relief hole includes a first pressure relief hole and a second pressure relief hole penetrating the side wall of the column along the diameter direction of the column, and the aperture of the first pressure relief hole gradually increases from the cavity to the outside.

[0015] As described above, the center column structure of the coaxial tweeter is provided with a locking groove on the center column, and the connecting piece is provided with a locking buckle. After the connecting piece is sleeved on the center column, it is rotated relative to the center column so that the locking buckle is inserted into the locking groove.

[0016] As described above, the center column structure of the coaxial tweeter, the connecting member is further provided with a buckle for pressing the U-iron.

[0017] In the center column structure of the coaxial tweeter as described above, the waveguide is provided with a positioning column, and the connecting piece is provided with a positioning groove that cooperates with the positioning column.

[0018] In the center column structure of the coaxial tweeter as described above, the nut is included in the center column.

[0019] A speaker box includes the center column structure of the coaxial tweeter as described above.

[0020] The beneficial effects of this application are:

[0021] The utility model provides a center column structure of a coaxial tweeter, which changes the traditional solid center column into a hollow center column with a cavity and a mounting cavity, so that the Fs of the tweeter is reduced from the conventional 1400-1500Hz to 850Hz; DC offset is avoided and distortion is reduced. The center column, waveguide, sound film and U iron are designed as a whole, and the effective volume of the center column is increased while maintaining the shape unchanged, which greatly reduces f0 and voice coil DC offset, and improves power carrying capacity and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 yes Figure 1 Exploded diagram of

[0025] Figure 3 yes Figure 1 Half section view. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The center column structure of the coaxial tweeter includes

[0028] The middle column 1 includes a column 11, a cavity 12 provided in the column 11, a mounting cavity 13 provided at the end of the column 11 and connecting the cavity 12 with the outside, and a first connecting hole 14 provided at the other end of the column 11 and connecting the cavity 12 with the outside; supports and acts as a back air cavity;

[0029] A connecting member 2, which is detachably connected to the center column 1;

[0030] The waveguide 3 is arranged on the connecting member 2, so that the impedance of the sound membrane and the atmosphere can be matched and the diffusion angle can be controlled;

[0031] The sound film 4 is arranged between the waveguide 3 and the connecting member 2 and covers the opening of the mounting cavity 13; it pushes the air to produce sound;

[0032] The U iron 5 is located in the installation cavity 13 and is provided with a second connection hole 51 which is arranged toward the first connection hole 14 and is coaxial with the first connection hole 14 to provide a magnetic field.

[0033] The utility model provides a center column structure of a coaxial tweeter, which changes the traditional solid center column into a hollow center column with a cavity and a mounting cavity, so that the Fs of the tweeter is reduced from the conventional 1400-1500Hz to 850Hz; DC offset is avoided and distortion is reduced. The center column, waveguide, sound film and U iron are designed as a whole, and the effective volume of the center column is increased while maintaining the shape unchanged, which greatly reduces f0 and voice coil DC offset, and improves power carrying capacity and reliability.

[0034] Further, as a preferred implementation of the present solution but not limiting, the center column 1 includes a nut 15 provided on the column body 11, and the nut 15 is provided corresponding to the first connection hole 14. The nut can improve the support with higher strength.

[0035] Furthermore, as a preferred implementation mode of the present invention but not a limitation, it also includes a support member 6, which passes through the nut 15 and the first connecting hole 14 in sequence and is threadedly connected to the second connecting hole 51 to support the U iron 5 to be suspended relative to the installation cavity 13.

[0036] Further, as a preferred embodiment of the present invention but not limiting, the U iron 5 is provided with a main magnet 52, a washer 53, an auxiliary magnet 54, and a voice coil 55 stacked in sequence, and the voice coil 55 is sleeved on the outer periphery of the washer 53 and extends toward the sound membrane 4 to provide a magnetic field.

[0037] Furthermore, as a preferred implementation mode of the present invention but not a limitation, a pressure relief hole 16 connecting the cavity 12 with the outside is provided on the side wall of the column 11, and the pressure relief hole 16 includes a first pressure relief hole 161 and a second pressure relief hole 162 penetrating the side wall of the column 11 along the diameter direction of the column 11, and the aperture of the first pressure relief hole 161 gradually increases from the cavity 12 to the outside.

[0038] Further, as a preferred embodiment of the present invention but not limiting, the center column 1 is provided with a locking groove 17, the connecting member 2 is provided with a locking buckle 21, and the connecting member 2 is sleeved on the center column 1 and rotated relative to the center column 1 so that the locking buckle 21 is inserted into the locking groove 17. The structure is simple and easy to install and disassemble.

[0039] Further, as a preferred implementation of the present solution but not limiting, the connector 2 is further provided with a buckle 23 for pressing the U iron 5. The U iron is positioned from both the upper and lower sides in cooperation with the second connecting hole.

[0040] Further, as a preferred implementation manner of the present solution but not a limitation, a positioning column 31 is provided on the waveguide 3 , and a positioning groove 22 cooperating with the positioning column 31 is provided on the connector 2 .

[0041] Further, as a preferred implementation of the present solution but not limiting, the nut 15 is injection molded into the center column 1. Injection molding uses an injection molding process to achieve the effect of firmly fixing the nut.

[0042] A speaker box includes the center column structure of the coaxial tweeter as described above.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.

Claims

1. The center column structure of the coaxial tweeter is characterized by: include A middle column (1) comprises a column (11), a cavity (12) provided in the column (11), a mounting cavity (13) provided at the end of the column (11) and connecting the cavity (12) with the outside, and a first connecting hole (14) provided at the other end of the column (11) and connecting the cavity (12) with the outside; A connecting piece (2) which is detachably connected to the center column (1); A waveguide (3) disposed on the connecting member (2); A sound membrane (4), which is arranged between the waveguide (3) and the connecting member (2) and covers the opening of the installation cavity (13); A U-iron (5) is located in the installation cavity (13); the U-iron (5) is provided with a second connection hole (51) which is arranged in a direction toward the first connection hole (14) and is coaxial with the first connection hole (14).

2. The center column structure of the coaxial tweeter according to claim 1, characterized in that: The center column (1) comprises a nut (15) arranged on the column body (11), and the nut (15) is arranged corresponding to the first connection hole (14).

3. The center column structure of the coaxial tweeter according to claim 2, characterized in that: It also comprises a support member (6), which passes through the nut (15) and the first connection hole (14) in sequence and is threadedly connected to the second connection hole (51) to support the U iron (5) to be suspended relative to the installation cavity (13).

4. The center column structure of the coaxial tweeter according to claim 1, characterized in that: The U iron (5) is provided with a main magnet (52), a washer (53), an auxiliary magnet (54), and a voice coil (55) stacked in sequence. The voice coil (55) is sleeved on the outer periphery of the washer (53) and extends toward the sound membrane (4).

5. The center column structure of the coaxial tweeter according to claim 1, characterized in that: A pressure relief hole (16) is provided on the side wall of the column (11) and connects the cavity (12) with the outside world. The pressure relief hole (16) comprises a first pressure relief hole (161) and a second pressure relief hole (162) which penetrate the side wall of the column (11) along the diameter direction of the column (11). The diameter of the first pressure relief hole (161) gradually increases in a direction from the cavity (12) to the outside world.

6. The center column structure of the coaxial tweeter according to claim 1, characterized in that: The middle column (1) is provided with a locking groove (17), and the connecting piece (2) is provided with a locking buckle (21). After the connecting piece (2) is sleeved on the middle column (1), it rotates relative to the middle column (1) so that the locking buckle (21) is inserted into the locking groove (17).

7. The center column structure of the coaxial tweeter according to claim 1, characterized in that: The connecting piece (2) is also provided with a buckle (23) for pressing the U iron (5).

8. The center column structure of the coaxial tweeter according to claim 1, characterized in that: The waveguide tube (3) is provided with a positioning column (31), and the connecting piece (2) is provided with a positioning groove (22) that matches the positioning column (31).

9. The center column structure of the coaxial tweeter according to claim 2, characterized in that: The nut (15) is enclosed in the center column (1).

10. A speaker, characterized in that: The invention comprises a center column structure of a coaxial tweeter as claimed in any one of claims 1 to 9.

Images