Large buzzing sheet

Abstract

The large buzzing sheet comprises a metal substrate and a piezoelectric ceramic sheet arranged on the front surface of the metal substrate, the left side and the right side of the metal substrate are respectively provided with a side wing plate, the back surface of each side wing plate is fixedly connected with a back plate, and one side, far away from each side wing plate, of each back plate extends to the back surface of the metal substrate. The front of the side wing plate is fixedly connected with a front plate, the side, away from the side wing plate, of the front plate extends to the front of the piezoelectric ceramic piece, the top of the side wing plate is provided with a connecting plate, the front and back of the connecting plate are in swing connection with swing rods, and the sides, away from the connecting plate, of the swing rods extend to the outer side of the side wing plate and are fixedly connected with the side wing plate. Through the wrapping design of the left and right side wing plates, the back plate and the front plate, the piezoelectric ceramic piece is completely wrapped in the metal frame, a plane fixing mode of single glue bonding is replaced, the frame structure disperses shear force generated by vibration to the whole side wing plate system, stress is prevented from being concentrated on a glue bonding surface, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of buzzer technology, specifically a large buzzer. Background Technology

[0002] A buzzer is a common electronic sound-generating element, mainly used to produce sound prompts or alarm signals. It is usually made of piezoelectric material and uses the piezoelectric effect to convert electrical energy into mechanical vibration, thereby emitting sound.

[0003] For example, patent application number 202120832429.2 published on the China Patent Network, entitled "Buzzer Assembly," includes a piezoelectric ceramic buzzer, terminals, a shielding layer, and a power signal line. The piezoelectric ceramic buzzer comprises a piezoelectric ceramic sheet and a substrate bonded together. The piezoelectric ceramic sheet is connected to the power signal line, which is also connected to the terminals. The shielding layer covers the power signal line and includes a guide wire and conductive tape. The guide wire is coiled around the power signal line. The conductive tape includes a film, metal fiber filaments, and a conductive adhesive layer, which covers the guide wire. The guide wire is grounded after being connected to the terminals. The buzzer assembly obtained by this utility model achieves shielding against interference signals by covering the power signal line with a shielding layer, thereby improving the anti-interference capability of the buzzer assembly.

[0004] However, the metal substrate and piezoelectric ceramic sheet in existing buzzers are mainly bonded together with special conductive adhesive. When the buzzer generates continuous vibration during operation, the adhesive used by the user will delaminate after a long period of use, causing the two to separate.

[0005] Therefore, it is necessary to redesign and modify the large buzzer plate. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide a large buzzer chip that has the advantage of improved connection stability. It solves the problem that in existing buzzer chips, the metal substrate and piezoelectric ceramic sheet are mainly bonded together with special conductive adhesive. When the buzzer chip generates continuous vibration during operation, the adhesive used by the user will delaminate after a long period of use, causing the two to separate.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a large buzzer chip, comprising a metal substrate;

[0008] A piezoelectric ceramic sheet disposed on the front side of a metal substrate;

[0009] Side wing plates are provided on both the left and right sides of the metal substrate. A back plate is fixedly connected to the back of the side wing plate. The side of the back plate away from the side wing plate extends to the back of the metal substrate. A front plate is fixedly connected to the front of the side wing plate. The side of the front plate away from the side wing plate extends to the front of the piezoelectric ceramic sheet.

[0010] As a preferred embodiment of the present invention, a connecting plate is provided on the top of the side wing plate, and a swing rod is sway-connected to both the front and back of the connecting plate. The swing rod extends to the outside of the side wing plate from the side away from the connecting plate and is fixedly connected to the side wing plate.

[0011] As a preferred embodiment of this utility model, a bolt is provided on the front side of the swing arm, and the rear end of the bolt passes through the swing arm and the connecting plate in sequence and extends into the interior of the connecting plate. The connecting plate is threadedly connected to the bolt.

[0012] As a preferred embodiment of this utility model, a limiting frame is fixedly connected to the inner side of the side wing plate, and one side of the limiting frame side wing plate extends to the outer side of the piezoelectric ceramic sheet and contacts the edge of the piezoelectric ceramic sheet.

[0013] As a preferred embodiment of this utility model, both sides of the bottom of the connecting plate are fixedly connected with plug-in pieces, and the side of the plug-in piece away from the connecting plate extends to both sides of the metal substrate and plugs into the metal substrate.

[0014] As a preferred embodiment of the present invention, the front of the front plate is provided with a protrusion, the inner surface of the protrusion is fixedly connected with a rubber pad, the back of the rubber pad is set to be inclined outward, and the back of the rubber pad is in contact with the front of the piezoelectric ceramic sheet.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model completely encapsulates the piezoelectric ceramic sheet within a metal frame through a wrapping design of the left and right side panels, back panel, and front panel, replacing the planar fixing mode of single glue bonding. The frame structure disperses the shear force generated by vibration to the entire side panel system, avoiding stress concentration on the glue bonding surface and extending service life.

[0017] 2. This utility model uses a swing rod and connecting plate mechanism to convert the bolt preload into a continuous inward pressure on the side wing plate through the lever principle, which compensates for the attenuation of adhesive force caused by glue aging. The swing connection design allows for fine adjustment of pressure distribution during vibration, avoiding local overload that may occur with rigid fixation.

[0018] 3. This utility model achieves precise adjustment of pressure value through threaded connection, ensuring consistency of different batches of products, and facilitates re-tightening during later maintenance. The creep characteristics of metal bolts are better than the aging speed of glue, providing long-term stable clamping force and fundamentally eliminating the risk of delamination.

[0019] 4. This utility model limits the radial sliding that may occur during vibration by having the limiting frame make full circumference contact with the edge of the ceramic sheet. Even if the adhesive fails, the physical limiting can still maintain the relative position of the ceramic sheet and the substrate.

[0020] 5. This utility model uses a vertical interlocking design between the plug-in piece and the substrate to convert the lateral pressure of the side wing plate into the overall anti-torsional torque of the frame, preventing frame deformation caused by long-term vibration. The metal plug-in structure has better thermal expansion matching than glue, maintaining fixed reliability when the temperature changes.

[0021] 6. This utility model uses the inclined rubber pad to generate micro-friction during vibration, which converts part of the vibration energy into heat energy, reducing the impact on the bonding surface. The raised dot-shaped rubber pad design avoids local stress concentration that may occur during planar contact, while ensuring the bonding effectiveness in key areas. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0024] Figure 3 This is a partial structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the partial structural separation of this utility model.

[0026] In the figure: 1. Metal substrate; 2. Piezoelectric ceramic sheet; 3. Side wing plate; 4. Back plate; 5. Front plate; 6. Connecting plate; 7. Swing rod; 8. Bolt; 9. Limiting frame; 10. Insert piece; 11. Protrusion; 12. Rubber pad. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 4 As shown, the present invention provides a large buzzer chip, which includes a metal substrate 1;

[0029] A piezoelectric ceramic sheet 2 is disposed on the front side of the metal substrate 1;

[0030] The feature is that: a side wing plate 3 is provided on both the left and right sides of the metal substrate 1, a back plate 4 is fixedly connected to the back of the side wing plate 3, the side of the back plate 4 away from the side wing plate 3 extends to the back of the metal substrate 1, and a front plate 5 is fixedly connected to the front of the side wing plate 3, the side of the front plate 5 away from the side wing plate 3 extends to the front of the piezoelectric ceramic sheet 2.

[0031] refer to Figure 3 A connecting plate 6 is provided on the top of the side wing plate 3. A swing rod 7 is sway-connected to both the front and back of the connecting plate 6. The side of the swing rod 7 away from the connecting plate 6 extends to the outside of the side wing plate 3 and is fixedly connected to the side wing plate 3.

[0032] As a technical optimization of this utility model, the pre-tightening force of the bolt 8 is converted into a continuous inward pressure on the side wing plate 3 through the lever principle of the swing rod 7 and the connecting plate 6 mechanism, which compensates for the attenuation of adhesive force caused by glue aging. The swing connection design allows for fine adjustment of pressure distribution during vibration, avoiding local overload that may occur during rigid fixation.

[0033] refer to Figure 3 The front of the swing arm 7 is provided with a bolt 8. The rear end of the bolt 8 passes through the swing arm 7 and the connecting plate 6 in sequence and extends into the interior of the connecting plate 6. The connecting plate 6 is threadedly connected to the bolt 8.

[0034] As a technical optimization of this utility model, the pressure value can be precisely adjusted through threaded connection to ensure the consistency of different batches of products. At the same time, it is convenient to re-tighten during later maintenance. The creep characteristics of the metal bolt 8 are better than the aging speed of the glue, providing long-term stable clamping force and fundamentally eliminating the risk of delamination.

[0035] refer to Figure 4 A limiting frame 9 is fixedly connected to the inner side of the side wing plate 3. One side of the limiting frame 9 extends to the outer side of the piezoelectric ceramic sheet 2 and contacts the edge of the piezoelectric ceramic sheet 2.

[0036] As a technical optimization of this utility model, the limiting frame 9 makes full circumference contact with the edge of the ceramic sheet, which limits the radial sliding that may occur during vibration. Even if the glue fails, the physical limiting can still maintain the relative position of the ceramic sheet and the substrate.

[0037] refer to Figure 2 Both sides of the bottom of the connecting plate 6 are fixedly connected with plug-in pieces 10. The side of the plug-in piece 10 away from the connecting plate 6 extends to both sides of the metal substrate 1 and plugs into the metal substrate 1.

[0038] As a technical optimization of this utility model, the lateral pressure of the side wing plate 3 is converted into the overall anti-torsional torque of the frame by the vertical interlocking design of the plug-in piece 10 and the substrate, which prevents the frame deformation caused by long-term vibration. The metal plug-in structure has better thermal expansion matching than glue, and maintains fixed reliability when the temperature changes.

[0039] refer to Figure 4 The front panel 5 has a protrusion 11 on its front side. A rubber pad 12 is fixedly connected to the inner surface of the protrusion 11. The back of the rubber pad 12 is set to be inclined outward. The back of the rubber pad 12 is in contact with the front of the piezoelectric ceramic sheet 2.

[0040] As a technical optimization of this utility model, the inclined rubber pad 12 generates micro-friction motion during vibration, converting part of the vibration energy into heat energy, reducing the impact on the bonding surface. The raised dot-shaped rubber pad 12 design avoids local stress concentration that may occur during planar contact, while ensuring the bonding effectiveness of key areas.

[0041] The working principle and usage process of this utility model are as follows: The piezoelectric ceramic sheet 2 is initially adhered to the front of the metal substrate 1 using conductive adhesive to form a basic sound-generating unit. At this stage, the adhesive is only used for temporary fixation and its long-term bonding performance is not relied upon. Then, the connecting plate 6 is inserted into the top of the metal substrate 1 via the plug-in piece 10. Side wing plates 3 are installed on the left and right sides of the metal substrate 1 using a swinging motion. A back plate 4 extends from the back of the side wing plate 3, wrapping around the edge of the back of the substrate, and a front plate 5 extends from the front, covering the front of the piezoelectric ceramic sheet 2. The connecting plate 6 applies inward pressure to the side wing plates 3 by rotating the bolt 8. The pressure is transmitted through the front plate 5 to the surface of the piezoelectric ceramic sheet 2, forming a continuous mechanical clamping force. The limiting frame 9 on the inner side of the side wing plate 3 extends to the edge of the ceramic sheet, restricting its horizontal displacement through physical contact. Together with the pressure of the front plate 5, a fixed structure is formed to ensure that the ceramic sheet cannot move in a plane during vibration. When the front plate 5 is oscillating and fixed, the rubber pad 12 of the front plate 5 protrusion 11 contacts the front of the ceramic sheet under mechanical pressure. The outward tilting design of the rubber pad 12 generates a dynamic friction effect during vibration, which not only assists in fixing but also avoids pressure concentration that could lead to local delamination.

[0042] In summary, this large buzzer plate, through the encasing design of the left and right side wing plates 3, back plate 4, and front plate 5, completely encloses the piezoelectric ceramic plate 2 in a metal frame, replacing the planar fixing mode of single glue bonding. The frame structure disperses the shear force generated by vibration to the entire side wing plate 3 system, avoiding stress concentration on the glue bonding surface and extending service life.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large buzzer chip, comprising a metal substrate (1). A piezoelectric ceramic sheet (2) is disposed on the front side of a metal substrate (1). Its features are: Side wing plates (3) are provided on both the left and right sides of the metal substrate (1). A back plate (4) is fixedly connected to the back of the side wing plate (3). The side of the back plate (4) away from the side wing plate (3) extends to the back of the metal substrate (1). A front plate (5) is fixedly connected to the front of the side wing plate (3). The side of the front plate (5) away from the side wing plate (3) extends to the front of the piezoelectric ceramic sheet (2).

2. A large buzzer plate according to claim 1, characterized in that: A connecting plate (6) is provided on the top of the side wing plate (3). A swing rod (7) is swayed and connected to both the front and back of the connecting plate (6). The swing rod (7) extends to the outside of the side wing plate (3) on the side away from the connecting plate (6) and is fixedly connected to the side wing plate (3).

3. A large buzzer plate according to claim 2, characterized in that: The front of the swing arm (7) is provided with a bolt (8), the rear end of the bolt (8) passes through the swing arm (7) and the connecting plate (6) in sequence and extends into the interior of the connecting plate (6), and the connecting plate (6) is threadedly connected to the bolt (8).

4. A large buzzer plate according to claim 3, characterized in that: The inner side of the side wing plate (3) is fixedly connected to a limiting frame (9), and one side of the limiting frame (9) of the side wing plate (3) extends to the outer side of the piezoelectric ceramic sheet (2) and contacts the edge of the piezoelectric ceramic sheet (2).

5. A large buzzer plate according to claim 4, characterized in that: Both sides of the bottom of the connecting plate (6) are fixedly connected with plug-in pieces (10). The side of the plug-in piece (10) away from the connecting plate (6) extends to both sides of the metal substrate (1) and plugs into the metal substrate (1).

6. A large buzzer plate according to claim 5, characterized in that: The front plate (5) has a protrusion (11) on its front side. A rubber pad (12) is fixedly connected to the inner surface of the protrusion (11). The back of the rubber pad (12) is set to be inclined outward. The back of the rubber pad (12) is in contact with the front of the piezoelectric ceramic sheet (2).

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