Ceramic base for crystal resonator

Abstract

The utility model relates to the technical field of bases for crystal resonators, in particular to a ceramic base for a crystal resonator, which comprises a crystal resonator body and a ceramic seat, the bottom end of the crystal resonator body is mounted on the ceramic seat and is provided with a limit ring, the ceramic seat is provided with a ceramic upper shell, and the ceramic upper shell is provided with a ceramic lower shell. A positioning groove is formed in the ceramic upper shell, a mounting groove is formed in the bottom end of the positioning groove, a heat dissipation mechanism, a positioning mechanism, an electromagnetic shielding mechanism and a fastening mechanism are arranged between the ceramic upper shell and the ceramic base, and the fastening mechanism comprises a limiting groove and an elastic column. The ceramic material of the ceramic base and the ceramic material of the ceramic upper shell of the structure have excellent high temperature resistance, compared with a metal or plastic base, the ceramic base and the ceramic upper shell are more suitable for extreme environments such as vehicle-mounted and aerospace equipment, and the failure rate caused by environmental factors is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of base for crystal resonator, specifically ceramic base for crystal resonator. BACKGROUND

[0002] It is known that the crystal resonator as the core frequency source in electronic equipment, its performance directly determines the precision and stability of the equipment. However, the base design of the traditional crystal resonator has many technical bottlenecks, especially in high temperature environment, electromagnetic interference, assembly reliability and heat dissipation efficiency, the thermal expansion coefficient of the metal base (such as stainless steel, aluminum alloy) is higher although the thermal conductivity is better, and the thermal expansion deformation is easy to occur in the high temperature environment such as the high temperature scene of vehicle or industrial equipment, which leads to the installation position deviation of the resonator body and the base, and affects the frequency stability. The metal base can become a conductor of electromagnetic interference, not only will introduce external electromagnetic noise, but also can interfere with other circuits due to the radiation leakage of the resonator itself signal, reduce the signal purity, the resonator body is bonded on the base, but the adhesive will gradually age when the temperature is higher than 80 DEG C for a long time, which leads to the decrease of bonding strength. In addition, vibration or temperature cycle can cause the adhesive layer to crack, causing the resonator to loosen or shift, but this kind of structure is easy to fatigue fracture in long-term vibration environment, and cannot adapt to the size change caused by thermal expansion, and the buckle structure can cause the buckle gap to increase due to the thermal expansion of the base, and lose the fixing effect, so it is necessary to put forward a solution to this technical problem. SUMMARY

[0003] (I) technical problem solved

[0004] In view of the defects of the prior art, the utility model provides a ceramic base for crystal resonator.

[0005] (II) technical scheme

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a ceramic base for crystal resonator, including crystal resonator body and ceramic seat, the bottom end of the crystal resonator body is installed on the ceramic seat and is equipped with a limit ring, the ceramic seat is equipped with ceramic upper shell, the ceramic upper shell is equipped with positioning groove, the bottom end of the positioning groove is equipped with mounting groove, the ceramic upper shell and the ceramic seat are equipped with heat dissipation mechanism, positioning mechanism, electromagnetic shielding mechanism and fastening mechanism, the fastening mechanism includes limit groove and elastic column, the limit groove is equipped in the top end of the ceramic upper shell and the bottom end of the ceramic seat, the limit groove is equipped with limit hole, the elastic column and two limit grooves are equipped with limit block.

[0007] Further, the utility model improves, the heat dissipation mechanism includes heat dissipation fin, heat dissipation fin installs at the top of ceramic upper shell, heat dissipation fin is equipped with multiple and array setting.

[0008] Further, the utility model improves, the heat dissipation mechanism still includes heat dissipation hole, heat dissipation hole is set up in the side of ceramic seat, heat dissipation hole is equipped with multiple and symmetric array setting.

[0009] Further, the utility model improves, the electromagnetic shielding mechanism includes shielding layer, the opening is set up on the shielding layer, and the shielding layer is located between ceramic upper shell and ceramic seat and is bonded connection.

[0010] Further, the utility model improves, the positioning mechanism includes positioning column and positioning hole, positioning column installs at the top of ceramic seat, and the positioning hole is set up on the shielding layer and ceramic upper shell, and the positioning column passes two positioning holes.

[0011] Further, the utility model improves, the positioning mechanism is equipped with multiple and array setting.

[0012] Further, the utility model improves, the elastic column and the limiting block are all high temperature resistant rubber material.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the utility model provides a ceramic base for crystal resonator, has the following beneficial effects:

[0015] The ceramic base for crystal resonator, through the cooperation of elastic column and limiting block, even if the adhesive loses tackiness due to long-term high temperature, the elastic column can still support the ceramic seat and the upper shell through the elastic force generated by deformation, ensure the stability of structure, the electromagnetic shielding mechanism effectively isolates external electromagnetic interference, and at the same time, inhibits the radiation leakage of resonator's own signal, improves signal purity, the ceramic material itself has excellent thermal conductivity, combined with the heat dissipation mechanism, accelerates the heat transfer from the resonator body to the external environment, avoids the performance attenuation caused by overheating, through the positioning mechanism, the ceramic upper shell and the base are quickly aligned, the double fixing of adhesive and mechanical limiting guarantees the initial installation strength, and the mechanical structure compensates the failure risk after the aging of colloid, prolongs the service life of product, the ceramic material has excellent high temperature resistance, compared with metal or plastic base, is more suitable for extreme environment such as vehicle, aerospace equipment, and reduces the failure rate caused by environmental factors. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model structure is shown Figure 1 ;

[0017] Figure 2 Structure diagram of the utility model Figure 2 ;

[0018] Figure 3 Structure diagram of the utility model Figure 1 Enlarged structure front half sectional view of the ceramic base

[0019] Figure 4 Structure diagram of the utility model Figure 1 Enlarged structure front half sectional view of the ceramic upper shell

[0020] In the figure: 1, crystal resonator body; 2, ceramic base; 3, limiting ring; 4, ceramic upper shell; 5, limiting groove; 6, elastic column; 7, limiting block; 8, heat dissipation fin; 9, heat dissipation hole; 10, shielding layer; 11, positioning column; 12, positioning hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-4The utility model provides a kind of ceramic pedestal for crystal resonator, including crystal resonator body 1 and ceramic seat 2, the bottom end of the crystal resonator body 1 is installed on the ceramic seat 2 and is equipped with limit ring 3, ceramic upper shell 4 is equipped on the ceramic seat 2, positioning groove is opened on the ceramic upper shell 4, mounting groove is opened in the bottom end of positioning groove, heat dissipation mechanism, positioning mechanism, electromagnetic shielding mechanism and fastening mechanism are equipped between the ceramic upper shell 4 and the ceramic seat 2, the fastening mechanism includes limit slot 5 and elastic column 6, limit slot 5 is opened in the top end of the ceramic upper shell 4 and the bottom end of the ceramic seat 2, limit hole is opened on the limit slot 5, limit block 7 is equipped between the elastic column 6 and two limit slot 5, in the embodiment, personnel sets up electromagnetic shielding mechanism on ceramic seat 2, then ceramic upper shell 4 is positioned in the top end of ceramic seat 2 by positioning mechanism, first using traditional glue is bonded together, then elastic column 6 is inserted into limit hole by force alignment, elastic column 6 is extruded and shrinks into limit hole by limit hole, then limit block 7 is inserted into the limit slot 5 of corresponding position, by limit block 7 located in the top end of ceramic upper shell 4 and the bottom end of the ceramic seat 2, so that ceramic seat 2 and ceramic upper shell 4 are assembled together, by positioning groove electric mounting groove can make ceramic upper shell 4 rest on limit ring 3, so that crystal resonator body 1 is firmly and reliably fixed on ceramic seat 2, by the elastic support force of elastic column 6, still maintain installation stability when ceramic seat 2 and ceramic upper shell 4 are vibrated, still guarantee the installation stability between ceramic seat 2 and ceramic upper shell 4 when glue is reduced adhesion by high temperature influence after long-term use, and installation loosening condition does not appear due to long-term high temperature influence.

[0023] To guarantee the heat dissipation effect to crystal resonator body 1, in the scheme, the heat dissipation mechanism includes heat dissipation fin 8, the heat dissipation fin 8 is installed in the top end of the ceramic upper shell 4, the heat dissipation fin 8 is equipped with multiple and array arrangement, and the heat dissipation efficiency of the ceramic upper shell 4 can be improved by the multiple and array arrangement of the heat dissipation fin 8, to further enhance the heat dissipation effect to crystal resonator body 1.

[0024] To further improve the heat dissipation effect, in the scheme, the heat dissipation mechanism also includes heat dissipation hole 9, the heat dissipation hole 9 is opened in the side of the ceramic seat 2, the heat dissipation hole 9 is equipped with multiple and symmetric array arrangement, and the heat dissipation efficiency of crystal resonator body 1 can be further improved by the multiple symmetric arrangement of the heat dissipation hole 9 opened in the side of the ceramic seat 2.

[0025] In order to improve the electromagnetic shielding effect, the electromagnetic shielding mechanism includes a shielding layer 10, the shielding layer 10 is provided with an opening, the shielding layer 10 is located between the ceramic upper shell 4 and the ceramic base 2 and is adhesively connected, the crystal resonator body 1 passes through the opening of the shielding layer 10, then the shielding layer 10 is arranged at the top end of the ceramic base 2, then the shielding layer 10 and the bottom end of the ceramic upper shell 4 are adhesively connected by using glue, so that the shielding layer 10 can be quickly assembled, and the shielding layer 10 can reduce the influence of external electromagnetic interference on the signal of the crystal resonator body 1.

[0026] In order to facilitate positioning and assembling the shielding layer 10 and the ceramic upper shell 4, the positioning mechanism includes a positioning column 11 and a positioning hole 12, the positioning column 11 is installed at the top end of the ceramic base 2, the positioning hole 12 is arranged on the shielding layer 10 and the ceramic upper shell 4, and the positioning column 11 passes through the two positioning holes 12, so that the shielding layer 10 and the ceramic upper shell 4 can be quickly positioned and assembled, the positioning mechanism is provided in plurality and is arranged in array, and the ceramic upper shell 4 and the shielding layer 10 can be further facilitated to be positioned and assembled by the plurality of and arrayed positioning mechanisms.

[0027] In order to improve the high-temperature resistance of the elastic column 6 and the limiting block 7, the elastic column 6 and the limiting block 7 are both made of high-temperature-resistant rubber material, preferably fluorine rubber or silicon rubber, the long-term working temperature is-40℃~200℃, the elastic column 6 and the limiting block 7 can effectively normally play the role of elastic support in a high-temperature environment during use of the structure, and the occurrence of yellowing due to high temperature is prevented.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A ceramic base for a crystal resonator comprising a crystal resonator body (1) and a ceramic seat (2), characterized in that, The bottom end of the crystal resonator body (1) is mounted on the ceramic base (2) and is provided with a limiting ring (3), the ceramic base (2) is provided with a ceramic upper shell (4), the ceramic upper shell (4) is provided with a positioning groove, the bottom end of the positioning groove is provided with a mounting groove, the ceramic upper shell (4) and the ceramic base (2) are provided with a heat dissipation mechanism, a positioning mechanism, an electromagnetic shielding mechanism and a fastening mechanism, the fastening mechanism comprises a limiting groove (5) and an elastic column (6), the limiting groove (5) is arranged at the top end of the ceramic upper shell (4) and the bottom end of the ceramic base (2), the limiting groove (5) is provided with a limiting hole, and the elastic column (6) and the two limiting grooves (5) are provided with a limiting block (7).

2. A ceramic holder for a crystal resonator according to claim 1, wherein The heat dissipation mechanism comprises a heat dissipation fin (8), the heat dissipation fin (8) is mounted at the top end of the ceramic upper shell (4), and the heat dissipation fin (8) is provided with a plurality of and is arranged in an array.

3. A ceramic holder for a crystal resonator according to claim 2, wherein The heat dissipation mechanism further comprises a heat dissipation hole (9), the heat dissipation hole (9) is arranged at the side of the ceramic base (2), and the heat dissipation hole (9) is provided with a plurality of and is arranged in an array.

4. A ceramic holder for a crystal resonator according to claim 1, wherein The electromagnetic shielding mechanism comprises a shielding layer (10), the shielding layer (10) is provided with an opening, and the shielding layer (10) is located between the ceramic upper shell (4) and the ceramic base (2) and is adhesively connected.

5. A ceramic holder for a crystal resonator according to claim 4, wherein The positioning mechanism comprises a positioning column (11) and a positioning hole (12), the positioning column (11) is mounted at the top end of the ceramic base (2), the positioning hole (12) is arranged on the shielding layer (10) and the ceramic upper shell (4), and the positioning column (11) penetrates through the two positioning holes (12).

6. A ceramic holder for a crystal resonator according to claim 5, wherein The positioning mechanism is provided with a plurality of and is arranged in an array.

7. A ceramic holder for a crystal resonator according to claim 1, wherein The elastic column (6) and the limiting block (7) are both made of high-temperature-resistant rubber material.

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