Piezoelectric integrated pe diaphragm tweeter

Abstract

This utility model relates to a piezoelectric integrated PE diaphragm tweeter in the field of electroacoustic conversion. It includes a piezoelectric buzzer cavity with a dust cover, and further includes: a fixed frame plate with a rectangular insertion groove on its lower end face, integrally formed with the lower inner wall of the piezoelectric buzzer cavity; and a carrier plate, inserted into the piezoelectric buzzer cavity, with its upper end face abutting against the fixed frame plate. In this application, the carrier plate achieves rapid positioning through the cooperation of the insertion block and the insertion groove of the fixed frame plate to improve assembly efficiency. Pressing the carrier plate automatically sprays adhesive to reduce processes and lower labor costs. The bonding cavity and the infusion cavity cooperate to ensure uniform glue filling to improve connection firmness. After the fixed frame plate and the cavity are integrally formed and the adhesive is discharged, the sealing strip deforms into a flat sealing gasket, filling the tiny gaps between the insertion block and the insertion groove. The combination of these two elements improves the cavity's sealing performance, preventing sound waves from generating noise due to reflection from gaps within the cavity.

Description

Technical Field

[0001] This utility model relates to a piezoelectric integrated PE diaphragm tweeter, and particularly to a piezoelectric integrated PE diaphragm tweeter used in the field of electroacoustic conversion. Background Technology

[0002] As a core high-frequency sound-generating component in an audio system, the piezoelectric integrated PE diaphragm tweeter primarily functions to reproduce high-frequency sound waves in audio signals, providing users with clear and delicate high-frequency sound effects. It is widely used in home audio, car audio, professional stage audio, and other fields. The core structure of this type of component typically includes a cavity for housing the piezoelectric element, a carrier plate for transmitting vibration, and a PE diaphragm body for sound generation. The assembly precision and connection reliability of each component directly affect its acoustic performance and service life.

[0003] Currently, piezoelectric integrated PE diaphragm tweeters still have the following shortcomings in terms of assembly and structural design;

[0004] Firstly, in the bonding and fixing process between the carrier piece and the cavity, it is necessary to manually apply additional glue to the bonding area using a glue injection tool. This process is not only cumbersome and labor-intensive, but also prone to uneven glue application and glue overflow, which affects assembly efficiency and product consistency.

[0005] Secondly, traditional bonding cavities are mostly discontinuous structures or closed designs at the bottom. When the glue is filled, it is easily affected by gravity and flow path, resulting in empty glue or missing glue at the bottom of the bonding cavity. This causes the connection between the carrier and the cavity to be weak, and it is easy to loosen after long-term use, which in turn affects the vibration transmission efficiency and sound quality stability.

[0006] Thirdly, the cavity and the fixed frame plate are mostly assembled in a split manner, which easily leaves gaps after assembly. Moreover, the joint between the bearing plate and the fixed frame plate lacks effective sealing measures. When sound waves propagate in the cavity, they are easily reflected by the gaps, generating noise. At the same time, external dust can easily enter the cavity through the gaps and adhere to the diaphragm surface, causing the diaphragm vibration to be obstructed and affecting the high-frequency sound output. In view of this, this utility model is proposed. Utility Model Content

[0007] The technical problem to be solved by this utility model is that when bonding the existing carrier sheet to the cavity, it is necessary to manually apply glue with a glue injection tool, which is a complicated process with high labor costs. It is also prone to uneven glue application and glue overflow, which affects assembly efficiency and product consistency.

[0008] To address the aforementioned issues, this utility model provides a piezoelectric integrated PE diaphragm tweeter, comprising a piezoelectric buzzer cavity with a dust cover, and further comprising: a fixed frame plate with a rectangular insertion groove on its lower end face, integrally formed with the lower inner wall of the piezoelectric buzzer cavity; a carrier plate, inserted into the piezoelectric buzzer cavity, with its upper end face abutting against the fixed frame plate; multiple integrated diaphragm bodies, fixedly mounted on the carrier plate, with a metal vibrating plate fixedly connected to the lower end of each diaphragm body; and insertion blocks, fixedly connected to the carrier plate and corresponding to the insertion grooves. A bonding cavity with an open lower end is formed around the circumference between the fixed frame plate and the inner wall of the piezoelectric buzzer cavity. A matching sealing strip is provided in each insertion groove, and the sealing strip has a hollow cavity for storing adhesive. A spray hole for spraying adhesive into the bonding cavity is formed on the outer wall of the sealing strip, and a temporary sealing component that can be ruptured under pressure is provided in each spray hole.

[0009] As a further improvement of this application, the temporary sealing component includes a sealing film that is adhered to the nozzle.

[0010] As a further improvement of this application, an infusion chamber is provided on the fixed frame plate, one end of which is connected to the spray hole and the other end is connected to the upper end of the bonding chamber.

[0011] As a further improvement of this application, the end of the infusion chamber near the bonding chamber is tapered, and the diameter of the infusion end is larger than the diameter of the spray end.

[0012] As another improvement of this application, grooves are provided on both ends of the bearing plate, and a snap-fit ​​block is slidably connected in the groove. The snap-fit ​​grooves corresponding to the grooves are provided on both sides of the inner wall of the piezoelectric buzzer cavity. An elastic reset member is provided in the groove, and the snap-fit ​​block is inserted into the snap-fit ​​groove under the pushing force of the elastic reset member.

[0013] As a further improvement to this application, the elastic reset member includes a spring, one end of which is fixedly connected to the snap-fit ​​block and the other end of which is fixedly connected to the inner wall of the groove.

[0014] As a further improvement to this application, the upper end face of the snap-fit ​​block is inclined, wherein when the inclined surface of the snap-fit ​​block contacts the inner wall of the piezoelectric buzzer cavity, the snap-fit ​​block can retract into the groove under the guidance of the inclined surface.

[0015] As a further improvement to this application, the piezoelectric buzzer cavity is symmetrically fixedly connected to two sides of the support feet, and the support feet are provided with mounting holes.

[0016] In summary, in this application, the carrier piece can be quickly positioned by the cooperation of the plug-in block and the plug-in slot of the fixed frame plate, avoiding offset and tilting during assembly, eliminating the need for additional positioning tools, shortening positioning time, and improving assembly efficiency.

[0017] Pressing the carrier piece allows the sealing strip to be squeezed through the plug-in block, causing the adhesive in the hollow cavity to break through the sealing film and flow into the bonding cavity. This eliminates the need for manual additional adhesive injection, reducing processes and lowering labor costs.

[0018] The bonding cavity is continuous around the perimeter and open at the bottom, allowing the adhesive to fill evenly under gravity. The infusion cavity further directs the adhesive to the bottom of the bonding cavity, avoiding the problems of empty or insufficient adhesive at the bottom in traditional structures. This ensures complete bonding between the carrier plate, the fixed frame plate, and the cavity, and improves the connection strength.

[0019] The fixed frame plate is integrally molded with the cavity, reducing assembly gaps. After the glue is discharged, the sealing strip deforms into a flat sealing gasket, filling the tiny gaps between the plug block and the plug groove. The combination of the two improves the cavity's sealing performance and prevents sound waves from generating noise due to reflection from gaps within the cavity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the structure of the piezoelectric buzzer cavity and the carrier plate according to the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the structure of an embodiment of this application. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the structure of an embodiment of this application. Figure 2 ;

[0023] Figure 4 This is a cross-sectional view of the piezoelectric buzzer cavity, carrier plate, and diaphragm according to an embodiment of this application;

[0024] Figure 5 This is a fracture view of the piezoelectric buzzer cavity according to an embodiment of this application;

[0025] Figure 6 This is an implementation method of the present application. Figure 4 Enlarged view of part A in the middle.

[0026] Explanation of the labels in the diagram:

[0027] 1. Piezoelectric buzzer housing; 101. Dust cover; 102. Support leg; 103. Mounting hole; 2. Bearing plate; 201. Diaphragm body; 202. Metal vibrating plate; 3. Fixing frame plate; 301. Insertion block; 302. Insertion groove; 303. Sealing strip; 304. Infusion chamber; 305. Adhesion chamber; 306. Sealing membrane; 4. Groove; 401. Snap-fit ​​block; 402. Spring; 403. Snap-fit ​​groove. Detailed Implementation

[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0029] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The piezoelectric integrated PE diaphragm tweeter includes a piezoelectric buzzer cavity 1 with a dust cover 101. The dust cover 101 is made of breathable polyester fiber, which can prevent dust from entering without affecting sound wave propagation. It also includes: a fixing frame plate 3 with a rectangular insertion slot 302 on its lower end face, integrally formed with the lower inner wall of the piezoelectric buzzer cavity 1; a carrier plate 2, inserted into the piezoelectric buzzer cavity 1, with its upper end face abutting against the fixing frame plate 3; and multiple integrated diaphragm bodies 201, fixedly mounted on the carrier plate 2. The diaphragm bodies 201 are made of PE polyethylene. A metal vibrating plate 202 is bonded to the end with conductive adhesive. The metal vibrating plate 202 is made of phosphor bronze. The plug block 301 is fixedly connected to the bearing plate 2 and corresponds to the plug groove 302. The fixed frame plate 3 and the inner wall of the piezoelectric buzzer cavity 1 are provided with an open-ended bonding cavity 305 at the lower end. The plug groove 302 is provided with a matching sealing strip 303. The sealing strip 303 is provided with a hollow cavity pre-filled with epoxy resin. The outer wall of the sealing strip 303 is provided with a spray hole for spraying glue into the bonding cavity 305. The spray hole is provided with a temporary sealing component that can be broken by pressure.

[0030] When assembling the piezoelectric integrated PE diaphragm tweeter, first align the carrier plate 2 with the opening of the piezoelectric buzzer cavity 1, and insert the plug 301 on the carrier plate 2 into the plug slot 302 of the fixed frame plate 3. This plug-in fit can quickly position the carrier plate 2, avoiding problems such as offset or tilting of the carrier plate 2 during the assembly process. No additional positioning tools are needed, which not only shortens the positioning time but also improves the assembly efficiency.

[0031] Subsequently, pressing the carrier plate 2 causes the insertion block 301 to squeeze the sealing strip 303. The glue pressure in the hollow cavity inside the sealing strip 303 increases, breaking through the sealing film 306. The glue flows into the bonding cavity 305. Because the bonding cavity 305 is continuous and open at the bottom, the glue is evenly filled under the action of gravity, eliminating the need for an additional glue injection process. This achieves automatic and uniform bonding between the carrier plate 2, the fixed frame plate 3, and the piezoelectric buzzer cavity 1, ensuring bonding strength while reducing labor costs. At the same time, the glue is completely drained from the cavity. After the hollow cavity of the seal 303, under the continuous compression of the plug block 301, the seal 303 will deform from the initial rectangular cross section into a flat shape, tightly fitting between the plug block 301 and the plug groove 302, forming a flat sealing gasket, which further fills any possible tiny gaps. At the same time, the integrally formed fixed frame plate 3 and the piezoelectric buzzer cavity 1 reduce assembly gaps. The combination of the two improves the cavity sealing performance and effectively avoids noise caused by sound waves reflecting through gaps in the cavity.

[0032] When an external audio signal is connected to the piezoelectric buzzer cavity 1, the piezoelectric element inside the piezoelectric buzzer cavity 1 generates high-frequency vibration and transmits it to the carrier plate 2, causing the diaphragm body 201 and the metal vibrator 202 on the carrier plate 2 to vibrate synchronously. The diaphragm body 201 made of PE material has good elasticity and can accurately reproduce high-frequency sound waves, while the metal vibrator 202 made of phosphor bronze material can enhance the rigidity of the diaphragm and avoid deformation distortion during high-frequency vibration. The two work together to achieve high-fidelity high-frequency sound and improve sound quality.

[0033] Figure 6 As shown, the temporary sealing component includes a sealing film 306, which is a 0.05mm thick transparent PET material with an adhesive strength of 0.5N / cm. 2 Food-grade pressure-sensitive adhesive is applied to the nozzle of the sealing strip 303. When the adhesive pressure in the hollow cavity inside the sealing strip 303 reaches 1 N / cm², 2 At that time, the sealing membrane 306 can be broken through without leaving any fragments;

[0034] Before assembly, the sealing film 306 is fixed to the nozzle of the sealing strip 303 by pressure-sensitive adhesive, completely blocking the connection between the hollow cavity of the sealing strip 303 and the outside world. This can effectively prevent the adhesive from degrading due to evaporation or external impurities from entering the hollow cavity of the sealing strip 303 and affecting the bonding effect. It ensures that the adhesive is in the best working condition during assembly, laying the foundation for the reliable bonding of the subsequent carrier plate 2 to the fixed frame plate 3 and the piezoelectric buzzer cavity 1.

[0035] During assembly, when the insert block 301 on the carrier piece 2 presses against the sealing strip 303, the adhesive pressure in the hollow cavity of the sealing strip 303 rises sharply. When the pressure exceeds 0.5 N / cm, the adhesive pressure increases rapidly. 2The bonding strength is high. When the sealing film 306 breaks, the adhesive flows smoothly into the bonding cavity 305. Because the sealing film 306 made of PET material has good toughness, there are no small fragments after it breaks. This can prevent fragments from entering the bonding cavity 305 and affecting the bonding quality, or from entering the piezoelectric buzzer cavity 1 and interfering with the vibration of the diaphragm body 201 and the metal vibrator 202, thus ensuring stable product performance. At the same time, the switching between sealing and adhesive spraying can be achieved without additional operation, improving the convenience of assembly.

[0036] Figure 6 As shown, an infusion chamber 304 is provided on the fixed frame plate 3, which is processed by drilling. One end of the infusion chamber 304 is connected to the spray hole, and the other end is connected to the upper end of the bonding chamber 305. The port of the infusion chamber 304 near the bonding chamber 305 faces the lower end of the bonding chamber 305, ensuring that the glue can be sprayed directly onto the lower area of ​​the bonding chamber 305 after flowing out of the infusion chamber 304.

[0037] During the assembly of the piezoelectric integrated PE diaphragm tweeter, when the insert block 301 on the carrier plate 2 squeezes the sealing strip 303, the glue pressure in the hollow cavity inside the sealing strip 303 increases and breaks through the sealing film 306 in the nozzle. The glue first enters the infusion chamber 304, which is connected to the nozzle. Since one end of the infusion chamber 304 is directly connected to the upper end of the bonding chamber 305 and the port is designed to face the lower end of the bonding chamber 305, the glue, under the pressure generated by the continuous squeezing of the sealing strip 303, will flow rapidly along the channel of the infusion chamber 304 and be directly delivered to the upper part of the bonding chamber 305. Subsequently, it will be delivered through the port of the infusion chamber 304. The guiding effect of the adhesive sprays it precisely to the lower part of the bonding cavity 305, avoiding the problem of insufficient filling of the middle or upper part and lower part of the bonding cavity 305 due to the uncontrollable spray direction when the adhesive is sprayed directly from the nozzle of the sealing strip 303. By first conveying it to the upper part and then spraying it downwards, the adhesive is ensured to cover the entire space of the bonding cavity 305 from the lower end to the upper end. This solves the hidden danger of empty glue or missing glue at the lower end of the bonding cavity 305 in the traditional structure without infusion cavity 304, improves the bonding integrity of the carrier plate 2, the fixed frame plate 3, and the piezoelectric buzzer cavity 1, and thus ensures the firmness of the connection between the three.

[0038] Meanwhile, the infusion chamber 304 also serves to regulate the flow direction of the adhesive, preventing the adhesive from overflowing from the upper end of the bonding chamber 305 outside the piezoelectric buzzer chamber 1, reducing adhesive waste and lowering production material costs. Furthermore, the adhesive is quickly delivered and directionally sprayed to the lower end of the bonding chamber 305 through the infusion chamber 304, eliminating the need for manual adjustment of the adhesive filling position, shortening the filling time of the adhesive in the bonding chamber 305, and further improving assembly efficiency.

[0039] Figure 6As shown, the infusion chamber 304 is tapered at one end near the bonding chamber 305. The larger end of the tapered shape is the infusion end, which is connected to the nozzle of the sealing strip 303, and the smaller end of the tapered shape is the spray end, which is connected to the bonding chamber 305.

[0040] After the adhesive in the hollow cavity of the sealing strip 303 is squeezed and breaks through the sealing film 306, it directly enters the infusion chamber 304 through the spray hole. As the adhesive flows along the conical section towards the smaller end, the cross-sectional area of ​​the channel gradually decreases. According to the principle of fluid mechanics, the flow rate of the adhesive increases synchronously with the decrease in cross-sectional area, and the pressure increases accordingly, forming a high-pressure flow state. This high-pressure state allows the adhesive to obtain sufficient power and be quickly sprayed into the bonding chamber 305 from the smaller end of the cone, achieving the purpose of high-pressure and rapid spraying of the adhesive in the hollow cavity, avoiding the filling delay caused by the slow flow of adhesive in the cavity.

[0041] Figure 4 , Figure 5 , Figure 6 As shown, grooves 4 are provided on both sides of the bearing plate 2, and a snap-fit ​​block 401 is slidably connected in the groove 4. Snap-fit ​​grooves 403 corresponding to the grooves 4 are provided on both sides of the inner wall of the piezoelectric buzzer cavity 1. An elastic reset member is provided in the groove 4, and the snap-fit ​​block 401 is inserted into the snap-fit ​​groove 403 under the pushing force of the elastic reset member.

[0042] The elastic reset component includes a spring 402, one end of which is fixedly connected to the snap-fit ​​block 401, and the other end is fixedly connected to the inner wall of the groove 4.

[0043] During the assembly of the piezoelectric integrated PE diaphragm tweeter, the snap-fit ​​block 401 is first pressed and retracted into the groove 4, and the spring 402 is compressed until the snap-fit ​​block 401 is completely retracted into the groove 4, so as to prevent the snap-fit ​​block 401, which protrudes from the side wall of the carrier plate 2 in the initial state, from interfering with the insertion of the carrier plate 2 into the piezoelectric buzzer cavity 1.

[0044] Then, the carrier plate 2 is inserted into the piezoelectric buzzer cavity 1. When the carrier plate 2 is inserted into the piezoelectric buzzer cavity 1 to a certain depth, and the groove 4 is partially blocked by the inner wall of the piezoelectric buzzer cavity 1, the operator releases the locking block 401. At this time, the compressed spring 402 releases some elastic potential energy, pushing the locking block 401 to move out of the groove 4, so that the end of the locking block 401 contacts the inner wall of the piezoelectric buzzer cavity 1. Then, as the carrier plate 2 continues to be inserted, when the locking block 401 contacts the locking groove of the inner wall of the piezoelectric buzzer cavity 1... When 403 is aligned, the spring 402 instantly releases all the stored elastic potential energy, pushing the snap-fit ​​block 401 to quickly pop out of the groove 4 and insert into the snap-fit ​​slot 403, thus achieving mechanical fixation of the carrier piece 2. The carrier piece 2 can be kept in close contact with the fixed frame plate 3 without manual pressing, which can effectively prevent the carrier piece 2 from shifting during the glue curing process, and ensure that the glue is evenly distributed in the bonding cavity 305, so that a continuous and uniform glue layer is formed on the contact surface of the carrier piece 2, the fixed frame plate 3, and the piezoelectric buzzer cavity 1, thereby improving the bonding strength.

[0045] Figure 4 , Figure 5 , Figure 6 As shown, the upper end face of the snap-fit ​​block 401 is inclined. When the inclined surface of the snap-fit ​​block 401 contacts the inner wall of the piezoelectric buzzer cavity 1, the snap-fit ​​block 401 can retract into the groove 4 under the guidance of the inclined surface.

[0046] When the carrier piece 2 is inserted into the piezoelectric buzzer cavity 1, when the inclined surface of the locking block 401 contacts the inner wall of the piezoelectric buzzer cavity 1, the locking block 401 can retract into the groove 4 under the guidance of the inclined surface and compress the spring 402 until the locking block 401 is aligned with the locking groove 403 on the inner wall of the piezoelectric buzzer cavity 1. The spring 402 releases its elastic potential energy and pushes the locking block 401 into the locking groove 403. In this process, by converting the insertion force of the carrier piece 2 into the retraction force of the locking block 401, the insertion of the carrier piece 2 can be achieved without additional pressing of the locking block 401, further simplifying the assembly steps and improving the assembly efficiency.

[0047] Figure 1 , Figure 2 As shown, both sides of the piezoelectric buzzer cavity 1 are symmetrically fixedly connected with support legs 102, and the support legs 102 are provided with mounting holes 103 and are L-shaped.

[0048] After the piezoelectric integrated PE diaphragm tweeter is assembled, the support feet 102 on both sides of the piezoelectric buzzer cavity 1 are attached to the preset mounting surface of the speaker housing, so that the mounting holes 103 on the support feet 102 are aligned with the threaded holes on the speaker housing. Stainless steel screws are used to connect and fix the tweeter through the mounting holes 103 and the threaded holes on the speaker housing. The symmetrically arranged L-shaped support feet 102 can ensure that the piezoelectric integrated PE diaphragm tweeter is stably installed on the speaker housing, avoiding positional displacement due to vibration during use and ensuring stable sound quality.

[0049] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A piezoelectric integrated PE diaphragm tweeter, comprising a piezoelectric buzzer cavity (1) with a dust cover (101), characterized in that, Also includes: A fixed frame plate (3) with a rectangular insertion slot (302) on its lower end face is integrally formed with the lower inner wall of the piezoelectric buzzer cavity (1); The carrier plate (2) is inserted into the piezoelectric buzzer cavity (1), and the upper end face of the carrier plate (2) abuts against the fixed frame plate (3); Multiple integrated diaphragm bodies (201) are fixedly mounted on the support plate (2), and a metal vibrating plate (202) is fixedly connected to the lower end of the diaphragm body (201); A plug-in block (301) is fixedly connected to the bearing plate (2) and corresponds to the plug-in groove (302). The fixed frame plate (3) and the inner wall of the piezoelectric buzzer cavity (1) are provided with an adhesive cavity (305) with an open lower end. A matching sealing strip (303) is provided in the plug-in groove (302). The sealing strip (303) is provided with a hollow cavity for storing glue. The outer wall of the sealing strip (303) is provided with a spray hole for spraying glue into the adhesive cavity (305). A temporary sealing component that is ruptured by pressure is provided in the spray hole.

2. The piezoelectric integrated PE diaphragm tweeter according to claim 1, characterized in that: The temporary sealing component includes a sealing film (306) which is adhered to the nozzle.

3. The piezoelectric integrated PE diaphragm tweeter according to claim 1, characterized in that: The fixed frame plate (3) is provided with an infusion chamber (304), one end of which is connected to the spray hole and the other end is connected to the upper end of the bonding chamber (305).

4. The piezoelectric integrated PE diaphragm tweeter according to claim 3, characterized in that: The infusion chamber (304) is tapered at one end near the bonding chamber (305), and the diameter of the infusion end is larger than the diameter of the spray end.

5. The piezoelectric integrated PE diaphragm tweeter according to claim 1, characterized in that: The bearing plate (2) has grooves (4) on both sides of its sidewalls. A snap-fit ​​block (401) is slidably connected in the groove (4). The piezoelectric buzzer cavity (1) has snap-fit ​​grooves (403) on both sides of its inner walls that correspond to the grooves (4). An elastic reset member is provided in the groove (4). The snap-fit ​​block (401) is inserted into the snap-fit ​​groove (403) under the thrust of the elastic reset member.

6. The piezoelectric integrated PE diaphragm tweeter according to claim 5, characterized in that: The elastic reset component includes a spring (402), one end of which is fixedly connected to the snap-fit ​​block (401), and the other end is fixedly connected to the inner wall of the groove (4).

7. The piezoelectric integrated PE diaphragm tweeter according to claim 5, characterized in that: The upper surface of the snap-fit ​​block (401) is inclined. When the inclined surface of the snap-fit ​​block (401) contacts the inner wall of the piezoelectric buzzer cavity (1), the snap-fit ​​block (401) can retract into the groove (4) under the guidance of the inclined surface.

8. The piezoelectric integrated PE diaphragm tweeter according to claim 1, characterized in that: The piezoelectric buzzer cavity (1) is symmetrically fixed with support legs (102) on both sides, and the support legs (102) are provided with mounting holes (103).

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