Surface acoustic wave filter with protection structure

Abstract

The utility model discloses a surface acoustic wave filter with a protective structure. The filter comprises a filter body and a shielding layer, the shielding layer is arranged at the top of the filter body, and four groups of pin probes are arranged at the top of the filter body. The protective shell is provided with the shock absorption layer, the shock absorbers and the cooling layer, the cooling layer is filled with cold water, heat around the filter body is absorbed through the protective shell and the isolation layer, liquid epoxy resin of the shock absorption layer fluctuates, impact force is preliminarily absorbed through good damping performance of the liquid epoxy resin, and the shock absorption effect is improved. And the shock absorber contracts to further absorb the impact force through the sliding friction force, so that the safety of the surface acoustic wave filter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surface acoustic wave filters, and particularly relates to a surface acoustic wave filter with a protection structure. Background Technique

[0002] As a commonly used modern signal transmission component, the main function of a surface acoustic wave filter is that when an external electrical signal is transmitted to the inside of the filter through a pin probe, the piezoelectric material inside the filter vibrates, generates a mechanical signal, and converts the mechanical signal back into an electrical signal through a receiving transducer component, and outputs it through two groups of pin probes, thereby completing the conversion of the electrical signal. However, for existing surface acoustic wave filters, due to the lack of protection auxiliary components, during the use of the surface acoustic wave filter, it is impossible to reduce the heat generated by the surface acoustic wave filter, and at the same time, it is impossible to absorb the vibration conducted to the periphery of the surface acoustic wave filter, thereby affecting the safety of the surface acoustic wave filter.

[0003] Compared with the existing surface acoustic wave filter, due to the lack of protection components, during the use of the surface acoustic wave filter, the heat of the surface acoustic wave filter can be absorbed by a cooling layer, and at the same time, the impact force conducted to the inside of the surface acoustic wave filter can be absorbed, thereby improving the safety of the surface acoustic wave filter. Content of the Utility Model

[0004] The purpose of the utility model is to provide a surface acoustic wave filter with a protection structure to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: including a filter body and a shielding layer, a shielding layer is installed on the top of the filter body, and four groups of pin probes are installed on the top of the filter body.

[0006] Preferably, an isolation layer is installed on the outer surface of the filter body.

[0007] Preferably, a protective shell is installed on the outside of the isolation layer.

[0008] Preferably, a partition board is installed inside the protective shell.

[0009] Preferably, a shock-absorbing layer is installed inside the protective shell, and the shock-absorbing layer is located outside the partition board.

[0010] Preferably, a number of shock absorbers are installed on the inner side of the shock-absorbing layer.

[0011] Preferably, a cooling layer is installed inside the protective shell, and the cooling layer is located inside the partition board.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a shock absorption layer, a shock absorber and a temperature reduction layer. The temperature reduction layer is made of cold water filling, and absorbs the heat around the filter body through the protective shell and the isolation layer. The liquid epoxy resin in the shock absorption layer fluctuates, and the impact force is initially absorbed through the good damping property of the liquid epoxy resin. The shock absorber shrinks to further absorb the impact force through sliding friction, thereby improving the safety of the surface acoustic wave filter. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of a surface acoustic wave filter with a protective structure according to the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of the back of a surface acoustic wave filter with a protective structure according to the utility model;

[0016] Figure 3 For Figure 1 structural schematic diagram of the connection part of the filter body;

[0017] Figure 4 For Figure 1 structural schematic diagram of the sectional connection part of the protective shell;

[0018] Figure 5 For Figure 4 structural schematic diagram of the connection part at position A of;

[0019] In the figure: 1. Filter body; 2. Shielding layer; 3. Pin probe; 4. Isolation layer; 5. Protective shell; 6. Partition board; 7. Shock absorption layer; 8. Shock absorber; 9. Temperature reduction layer. Detailed Embodiment

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figure 1 , Figure 2 and Figure 3, the present utility model provides a technical solution: including a filter body 1 and a shielding layer 2. The shielding layer 2 is installed on the top of the filter body 1. The filter body 1 provides fixed points for the shielding layer 2, pin probes 3 and isolation layer 4 installed on its outer surface. When an electrical signal is transmitted to the inside of the filter body 1 through two groups of pin probes 3, inside the filter body 1, the piezoelectric material inside the filter body 1 converts the input electrical signal into a mechanical signal, and then reconverts the mechanical signal into an electrical signal and transmits it to the inside of the other two groups of pin probes 3. The shielding layer 2 is installed on the top of the filter body 1 and is made of flexible silicone material to provide shielding for the top of the filter body 1, thereby improving the stability of the filter body 1. Four groups of pin probes 3 are installed on the top of the filter body 1. The pin probes 3 are installed at the bottom of the filter body 1 and are connected to an external circuit board. When the electrical signal of the circuit board is transmitted to the inside of the two groups of pin probes 3, the two groups of pin probes 3 transmit the electrical signal to the inside of the two groups of pin probes 3 when the filter body 1 transmits the electrical signal to the inside of the two groups of pin probes 3, and the two groups of pin probes 3 retransmit the electrical signal to the inside of the circuit board. An isolation layer 4 is installed on the outer surface of the filter body 1. The isolation layer 4 is installed on the outer surface of the filter body 1 and is made of plastic material to provide fixed points for the protective shell 5 installed on its outer surface.

[0022] Working principle: First, insert the four groups of pin probes 3 into the top of the circuit board to complete the fixation of the filter body 1. When an electrical signal is transmitted to the inside of the filter body 1 through two groups of pin probes 3, inside the filter body 1, the piezoelectric material inside the filter body 1 converts the input electrical signal into a mechanical signal, and then reconverts the mechanical signal into an electrical signal and transmits it to the inside of the other two groups of pin probes 3. The pin probes 3 retransmit the electrical signal to the inside of the circuit board, thereby completing the conversion and output of the electrical signal.

[0023] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5, the present utility model provides a technical solution: including an isolation layer 4 and a protective shell 5. The protective shell 5 is installed on the outside of the isolation layer 4. The protective shell 5 is installed on the outside of the isolation layer 4 to provide a fixed point for the partition 6, the shock-absorbing layer 7 and the temperature-lowering layer 9 installed inside it, and at the same time provide a shield for the outer surface of the filter body 1. A partition 6 is installed inside the protective shell 5. The partition 6 is installed inside the protective shell 5 to divide the inside of the protective shell 5. A shock-absorbing layer 7 is installed inside the protective shell 5, and the shock-absorbing layer 7 is located outside the partition 6. The shock-absorbing layer 7 is made of liquid epoxy resin filled. When the impact in the external environment is conducted to the inside of the protective shell 5, the liquid epoxy resin in the shock-absorbing layer 7 fluctuates. Due to the good damping property of the liquid epoxy resin, the impact force is initially absorbed. A number of shock absorbers 8 are installed inside the shock-absorbing layer 7. The shock absorbers 8 are installed inside the shock-absorbing layer 7. When the impact force is conducted to the inner wall of the shock-absorbing layer 7, the shock absorbers 8 contract to further absorb the impact force through sliding friction, thereby improving the stability of the filter body 1. A temperature-lowering layer 9 is installed inside the protective shell 5, and the temperature-lowering layer 9 is located inside the partition 6. The temperature-lowering layer 9 is made of cold water filled. Through the absorption of the heat around the filter body 1 by the protective shell 5 and the isolation layer 4, the stability of the filter body 1 is improved.

[0024] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A surface acoustic wave filter with a protective structure, comprising a filter body (1) and a shielding layer (2), characterized in that: A shielding layer (2) is installed on the top of the filter body (1), and four groups of pin probes (3) are installed on the top of the filter body (1).

2. The surface acoustic wave filter with a protective structure according to claim 1, characterized in that: An isolation layer (4) is installed on the outer surface of the filter body (1).

3. The surface acoustic wave filter with a protective structure according to claim 2, characterized in that: A protective shell (5) is installed on the outer side of the isolation layer (4).

4. The surface acoustic wave filter with a protective structure according to claim 3, characterized in that: A partition plate (6) is installed inside the protective shell (5).

5. The surface acoustic wave filter with a protective structure according to claim 3, characterized in that: A shock absorbing layer (7) is installed inside the protective shell (5), and the shock absorbing layer (7) is located outside the partition (6).

6. The surface acoustic wave filter with a protective structure according to claim 5, characterized in that: A plurality of shock absorbers (8) are installed on the inner side of the shock absorbing layer (7).

7. The surface acoustic wave filter with a protective structure according to claim 3, characterized in that: A cooling layer (9) is installed inside the protective shell (5), and the cooling layer (9) is located on the inner side of the partition (6).

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