Multipurpose squealer

Abstract

The utility model provides a multipurpose squealer, which comprises a squealer shell, a first piezoelectric patch arranged in the squealer shell and a cover plate structure used for sealing an end opening of the squealer shell, and a sound hole structure is arranged at the position, corresponding to the central area of the first piezoelectric patch, of the squealer shell. A first piezoelectric plate is arranged in the squealer shell, a second piezoelectric plate is further arranged in the squealer shell, a preset distance is reserved between the first piezoelectric plate and the second piezoelectric plate, the first piezoelectric plate is a low-frequency piezoelectric plate, the second piezoelectric plate is a high-frequency piezoelectric plate, another piezoelectric plate is additionally arranged in the squealer shell, one of the piezoelectric plates is responsible for sounding in a low-frequency area, and the other piezoelectric plate is responsible for sounding in a high-frequency area. The shape of the cavity is guaranteed to meet the sounding requirement of the second piezoelectric plate through the space in the squealer shell, airflow vibration of the second piezoelectric plate is effectively guided by utilizing the Helmholtz resonance cavity principle, normal sounding work of the two piezoelectric plates with different working frequencies is guaranteed, and the sounding frequency range of the piezoelectric generator is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to acoustics device technical field, specifically, relate to a multipurpose sounder. BACKGROUND

[0002] The piezoelectric sounder of prior art includes a shell with an opening at one end and a sound hole on the bottom cover at the other end, a piezoelectric sheet, a printed board and two pins, the piezoelectric sheet is fixed in the shell, the printed board is fixed at the opening of the shell and outside the piezoelectric sheet, the two pins are fixed on the outer surface of the printed board, and the fixed ends of the two pins are connected to the positive and negative poles of the piezoelectric sheet through wires.

[0003] In summary, the existing piezoelectric sounder has the technical problem of narrow sound frequency range, which leads to narrow use range of the sounder. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of the existing piezoelectric sounder, which has a narrow sound frequency range, leading to narrow use range of the sounder.

[0005] To solve the above problems, the utility model provides a multipurpose sounder, which comprises a sounder shell, a first piezoelectric sheet arranged in the sounder shell, and a cover plate structure for closing the open end of the sounder shell, the sounder shell is provided with a sound hole structure corresponding to the center area of the first piezoelectric sheet, the sounder shell is further provided with a second piezoelectric sheet, the first piezoelectric sheet and the second piezoelectric sheet are separated by a preset distance, the first piezoelectric sheet is a low-frequency piezoelectric sheet, and the second piezoelectric sheet is a high-frequency piezoelectric sheet.

[0006] The novel multipurpose sounder is designed on the basis of the basic structure of the ordinary sounder, another piezoelectric sheet is arranged in the sounder shell, one of the first piezoelectric sheet and the second piezoelectric sheet is responsible for sound generation in the low-frequency area, and the other is responsible for sound generation in the high-frequency area, and the preset distance between the two piezoelectric sheets is matched with the space in the sounder shell, so that the cavity shape meets the sound generation requirements of the second piezoelectric sheet, the Helmholtz resonance cavity principle is used to effectively guide the airflow vibration of the second piezoelectric sheet, and the two piezoelectric sheets with different working frequencies can normally sound, the sound frequency range of the piezoelectric generator is effectively widened, and the technical problem of the existing piezoelectric sounder, which has a narrow sound frequency range, leading to narrow use range of the sounder, is solved.

[0007] As a preferred scheme, the first piezoelectric sheet is provided with a conical sound guide plate on the side end face facing the second piezoelectric sheet, and the tip of the conical sound guide plate faces the second piezoelectric sheet. This design further optimizes the cavity structure design between the first piezoelectric sheet and the second piezoelectric sheet. The conical sound guide plate is provided on the second piezoelectric sheet, and the tip of the conical sound guide plate corresponds to the center position of the two piezoelectric sheets. The cavity structure between the two piezoelectric sheets is modified by the sound guide plate structure, so that the resonance of the second piezoelectric sheet is more suitable for high-frequency sound production, and the sound and vibration can be transmitted outward through the sound hole structure closer to the first piezoelectric sheet.

[0008] As a preferred scheme, the second piezoelectric sheet is provided with a resonant ring sheet on the side end face facing the first piezoelectric sheet, and the resonant ring sheet is coaxially provided with the second piezoelectric sheet in a hollow sheet shape. This design further optimizes the resonant cavity design between the two piezoelectric sheets. Based on the above design with a conical inner protrusion structure, a ring-shaped resonant ring sheet is further provided on the end face of the second piezoelectric sheet. The resonant space between the two piezoelectric sheets is further separated by this structure, further improving the high-frequency vibration sound production effect of the added second piezoelectric sheet.

[0009] As a preferred scheme, the inner periphery of the resonant ring sheet is provided with a boss structure, which is in contact with the second piezoelectric sheet to provide the required cavity depth. This design optimizes the structure design of the resonant ring sheet. The annular boss structure is provided on the edge of the hollow position of the inner ring. The surface of the resonant ring sheet is isolated from the second piezoelectric sheet by the structure to further improve the shape of the resonant cavity suitable for the propagation of high-frequency sound vibration signals.

[0010] As a preferred scheme, the sound device shell is provided with a support table structure at one end of the sound hole structure, the support table structure is in a hollow column shape for fixedly connecting the first piezoelectric sheet, and the outer periphery of the support table structure is fixedly connected with the inner side wall of the sound device shell through a support leg. This design optimizes the support of the first piezoelectric sheet by the sound device shell. The end face of the support table structure has the above-mentioned sound hole structure, and the other end side edge is used for fixedly connecting the first piezoelectric sheet. The support table structure itself is not closed fixed between the side inner side face of the sound device shell, but is connected with the sound device shell through multiple support legs to ensure the resonant propagation performance of the sound device inner cavity.

[0011] As a preferred scheme, the top end face of the support leg is fixedly connected with the outer periphery of the end face of the resonant ring sheet to maintain the distance between the resonant ring sheet and the first piezoelectric sheet. This design further optimizes the function of the support leg used to connect the support table structure and the sound device shell. The side end face position facing the second piezoelectric sheet corresponds to the position of the resonant ring sheet in the shell, which can be used to support and fix the resonant ring sheet, and improves the stability of the internal structure of the sound device.

[0012] As a preferred scheme, the side surface of the sounder shell is provided with a through-hole type and a groove type wire slot structure at the positions corresponding to the first piezoelectric sheet and the second piezoelectric sheet, respectively, which are used for leading the wires of the first piezoelectric sheet and the second piezoelectric sheet out of the sounder shell. This design optimizes the wire structure of the sounder, facilitates the wire control of the two piezoelectric sheets, and protects the wires of the sounder.

[0013] As a preferred scheme, the end surface edge of the cover plate structure is provided with an annular stepped surface structure for clamping installation and fixation with the open position of the sounder shell. This design optimizes the structural installation performance of the sounder, and through the annular stepped surface structure provided at the edge of the cover plate, clamping installation with the sounder shell can be achieved conveniently, facilitating assembly and disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A split structure schematic diagram of a multipurpose sounder is provided in the utility model.

[0015] Figure 2 A structure schematic diagram of a sounder shell of a multipurpose sounder is provided. Figure 1 A structure schematic diagram of a sounder shell of a multipurpose sounder is provided.

[0016] Figure 3 A structure schematic diagram of a sounder shell of a multipurpose sounder is provided. Figure 1 A structure schematic diagram of a sounder shell of a multipurpose sounder is provided.

[0017] Among them, Figures 1-3 Among them,

[0018] 1, sounder shell; 1-1, support leg; 1-2, support table structure; 1-3, wire slot structure; 2, first piezoelectric sheet; 3, second piezoelectric sheet; 4, cover plate structure; 5, resonance ring sheet; 5-1, boss structure; 6, sound guide plate. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0020] Before the working principle of the utility model is described in detail, the description of the utility model still needs to be further explained: in the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can be directly connected, can be indirectly connected through intermediate medium, or can be two element welding connection. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Reference Figures 1-3 The following examples are described as follows, Figure 1 A split structure schematic diagram of a multipurpose sounder is provided in the utility model; Figure 2 A Figure 1 A structure schematic diagram of the sounder shell of the multipurpose sounder; Figure 3 A Figure 1 A structure schematic diagram of the resonance ring sheet of the multipurpose sounder.

[0023] A multipurpose sounder provided in the embodiment comprises a sounder shell 1, a first piezoelectric sheet 2 arranged in the sounder shell 1 and a cover plate structure 4 for closing the open end of the sounder shell 1, the sounder shell 1 is provided with a sound hole structure at the position corresponding to the center area of the first piezoelectric sheet 2, and a second piezoelectric sheet 3 is further arranged in the sounder shell 1, the first piezoelectric sheet 2 and the second piezoelectric sheet 3 are separated by a preset distance, the first piezoelectric sheet 2 is a low-frequency piezoelectric sheet, and the second piezoelectric sheet 3 is a high-frequency piezoelectric sheet.

[0024] The new multi-purpose sounder is designed on the basis of the basic structure of the common sounder, and another piezoelectric sheet is arranged in the sounder shell 1. One of the first piezoelectric sheet 2 and the second piezoelectric sheet 3 is responsible for sound generation in the low frequency range, and the other is responsible for sound generation in the high frequency range. The space in the sounder shell 1 cooperates with the preset interval between the two piezoelectric sheets to ensure that the cavity shape meets the sound generation requirements of the second piezoelectric sheet 3. The Helmholtz resonance cavity principle is used to effectively guide the airflow vibration of the second piezoelectric sheet 3, so that the two piezoelectric sheets with different working frequencies can normally generate sound, effectively expand the sound frequency range of the piezoelectric generator, and solve the technical problems of the existing piezoelectric sounder, such as narrow sound frequency range and narrow use range of the sounder.

[0025] In the technical scheme provided by the embodiment, the first piezoelectric sheet 2 is attached with a conical sound guide plate 6 on the side end face facing the second piezoelectric sheet 3, and the tip of the conical sound guide plate 6 faces the second piezoelectric sheet 3. This design further optimizes the cavity structure design in the shell between the first piezoelectric sheet 2 and the second piezoelectric sheet 3. The conical sound guide plate 6 is attached to the second piezoelectric sheet 3, and the tip position of the conical sound guide plate 6 corresponds to the center position of the two piezoelectric sheets. The cavity structure between the two piezoelectric sheets is modified by the structure of the sound guide plate 6, so that the resonance of the second piezoelectric sheet 3 is more suitable for high-frequency sound generation, and the sound and vibration can be transmitted outward through the sound hole structure closer to the first piezoelectric sheet 2.

[0026] In the technical scheme provided by the embodiment, the second piezoelectric sheet 3 is attached with a resonance ring sheet 5 on the side end face facing the first piezoelectric sheet 2, and the resonance ring sheet 5 is coaxially arranged with the second piezoelectric sheet 3 in a hollow sheet shape. This design further optimizes the resonance cavity design between the two piezoelectric sheets. On the basis of the above design with the conical inner protrusion structure, the ring-shaped resonance ring sheet 5 is attached to the end face of the second piezoelectric sheet 3. The resonance space between the two piezoelectric sheets is further separated by this structure, and the high-frequency vibration sound generation effect of the added second piezoelectric sheet 3 is further improved.

[0027] In the technical scheme provided by the embodiment, the inner periphery of the resonance ring sheet 5 is provided with a boss structure 5-1, which is attached to the second piezoelectric sheet 3 to provide the required cavity depth. This design optimizes the structure design of the resonance ring sheet 5, and sets a ring-shaped boss structure 5-1 on the edge of the inner hollow position of the resonance ring sheet 5. The surface of the resonance ring sheet 5 is isolated from the second piezoelectric sheet 3 by the structure to further improve the shape of the resonance cavity suitable for the propagation of high-frequency sound vibration signals.

[0028] In the technical scheme provided by the embodiment, the sounder shell 1 is provided with a support table structure 1-2 at one end of the sound hole structure, the support table structure 1-2 is in a hollow columnar shape for fixedly attaching the first piezoelectric sheet 2, and the outer periphery of the support table structure 1-2 is fixedly connected with the inner side wall of the sounder shell 1 through a support leg 1-1. The design optimizes the support of the sounder shell 1 to the first piezoelectric sheet 2, the end face of the support table structure 1-2 has the sound hole structure, the other end side edge is used for fixedly attaching the first piezoelectric sheet 2, the support table structure 1-2 is non-closedly fixed between the sounder shell 1, and is connected with the sounder shell 1 through the plurality of support legs 1-1, so that the resonance propagation performance of the sounder cavity is ensured.

[0029] In the technical scheme provided by the embodiment, the top end face of the support leg 1-1 is fixedly abutted with the outer periphery of the end face of the resonance ring sheet 5, and is used for maintaining the spacing between the resonance ring sheet 5 and the first piezoelectric sheet 2. The design further optimizes the function of the support leg 1-1 used for connecting the support table structure 1-2 and the sounder shell 1, the side end face position of the support leg 1-1 towards the second piezoelectric sheet 3 corresponds to the position of the resonance ring sheet 5 in the shell, can be used for supporting and fixing the resonance ring sheet 5, and the stability of the internal structure of the sounder is improved.

[0030] In the technical scheme provided by the embodiment, the side face of the sounder shell 1 is provided with a wire slot structure 1-3 in a through hole shape and a groove shape at positions corresponding to the first piezoelectric sheet 2 and the second piezoelectric sheet 3, respectively, and the wire slot structure 1-3 is used for leading out the wires of the first piezoelectric sheet 2 and the second piezoelectric sheet 3 outside the sounder shell 1. The design optimizes the wire connection structure of the sounder, facilitates the wire control of the two piezoelectric sheets, and protects the wires of the sounder.

[0031] In the technical scheme provided by the embodiment, the end face edge of the cover plate structure 4 is provided with an annular stepped face structure, which is used for clamping and mounting and fixing with the open position of the sounder shell 1. The design optimizes the structure mounting performance of the sounder, and the annular stepped face structure arranged at the edge of the cover plate can be conveniently clamped and mounted with the sounder shell 1, so that assembly and disassembly are facilitated.

[0032] Although the embodiments of the utility model are disclosed as above, the protection scope of the utility model is not limited to this. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A multi-purpose sounder comprising a sounder housing (1), a first piezoelectric sheet (2) disposed in the sounder housing (1), and a cover structure (4) for closing an open end of the sounder housing (1), the sounder housing (1) being provided with a sound hole structure at a position corresponding to a central region of the first piezoelectric sheet (2), characterized in that, The sounder shell (1) is further provided with a second piezoelectric sheet (3), the first piezoelectric sheet (2) and the second piezoelectric sheet (3) are spaced apart by a preset distance, the first piezoelectric sheet (2) is a low-frequency piezoelectric sheet, and the second piezoelectric sheet (3) is a high-frequency piezoelectric sheet.

2. A multi-purpose sounder according to claim 1, characterised in that, The first piezoelectric sheet (2) is provided with a conical sound guide plate (6) on the side end face facing the second piezoelectric sheet (3), and the tip of the conical sound guide plate (6) faces the second piezoelectric sheet (3).

3. A multi-purpose sounder according to claim 2, wherein, The second piezoelectric sheet (3) is provided with a resonant ring sheet (5) on the side end face facing the first piezoelectric sheet (2), and the resonant ring sheet (5) is a hollow sheet-shaped ring coaxially arranged with the second piezoelectric sheet (3).

4. A multi-purpose sounder according to claim 3, wherein The inner periphery of the resonant ring sheet (5) is provided with a boss structure (5-1) which is in contact with the second piezoelectric sheet (3) and is used to provide the required cavity depth.

5. A multi-purpose sounder according to claim 4, wherein, The sounder shell (1) is provided with a support table structure (1-2) at one end of its sound hole structure, the support table structure (1-2) is a hollow column for fixedly connecting the first piezoelectric sheet (2), and the outer periphery of the support table structure (1-2) is fixedly connected with the inner side wall of the sounder shell (1) through a support leg (1-1).

6. A multi-purpose sounder according to claim 5, wherein, The top end face of the support leg (1-1) is fixedly connected with the outer periphery of the end face of the resonant ring sheet (5), which is used to maintain the distance between the resonant ring sheet (5) and the first piezoelectric sheet (2).

7. The multi-purpose sounder according to claim 1, wherein The side face of the sounder shell (1) is provided with a through-hole-shaped and a sunken groove-shaped wire slot structure (1-3) at positions corresponding to the first piezoelectric sheet (2) and the second piezoelectric sheet (3), respectively, which are used to guide the wires of the first piezoelectric sheet (2) and the second piezoelectric sheet (3) out of the sounder shell (1).

8. The multi-purpose sounder according to claim 1, wherein The end face edge of the cover plate structure (4) is provided with an annular stepped face structure which is used to be clamped and fixedly connected with the open position of the sounder shell (1).

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