Anti-vibration crystal oscillator structure

Abstract

The anti-vibration crystal oscillator structure provided by the embodiment of the invention comprises a crystal oscillator shell and a crystal oscillator internal structure, the crystal oscillator internal structure comprises an upper part, a middle part and a lower part, the upper part comprises a circuit board and a metal pressing strip, the middle part comprises a steel wire rope assembly and a flexible wire, and the lower part comprises a fixed groove and a metal pressing strip; signal wires and components are arranged in the middle of the circuit board, and boss bonding pads are arranged on the edge of the circuit board; the steel wire rope assembly and the flexible wire are installed between the circuit board and the base. The flexible lead is welded between the corresponding bonding pad of the circuit board and the corresponding lead column of the base; the steel wire rope assembly comprises steel wire ropes and metal sleeves. The steel wire rope is of an annular structure, the upper end and the lower end of the steel wire rope are connected with metal sleeves in a pressing mode respectively, the steel wire rope and the metal sleeves are fixed to the corresponding positions through metal pressing strips on the base and the circuit board, then the steel wire rope and the metal sleeves are welded to a boss bonding pad and a base groove respectively, the steel wire rope is fixed, and the circuit board is flexibly supported above the base. The miniaturized anti-oscillation crystal oscillator is realized under the condition of ensuring relatively good anti-oscillation performance.

Description

Technical Field

[0001] The invention relates to the technical field of crystal oscillators, in particular to an anti-vibration crystal oscillator structure. Background Art

[0002] Crystal oscillators are widely used in various electronic devices to provide time and frequency references. The general structure of crystal oscillators is as follows: Figure 1 As shown in the figure, the circuit board and the base lead pins are directly welded together. In a vibration environment, external vibrations are rigidly transmitted to the circuit board through the crystal base and lead pins, affecting vibration-sensitive components in the circuit, thereby deteriorating the performance of the crystal oscillator.

[0003] Electronic devices working in vehicle-mounted and airborne environments need to withstand different degrees of vibration. Under vibration conditions, the performance of the crystal oscillator in electronic equipment deteriorates, resulting in instability in time and frequency, thus affecting the overall performance and function of the equipment. In order to reduce the performance deterioration of the crystal oscillator under vibration conditions, it is necessary to improve the vibration resistance of the crystal oscillator. The use of a crystal oscillator structure with a vibration damper is a relatively common method. The vibration damper is used to attenuate the external vibration level and has little effect on the circuit performance. Therefore, it is widely used in anti-vibration crystal oscillators. The anti-vibration effect of this type of anti-vibration crystal oscillator is mainly related to the structural layout and vibration damping materials. Among various vibration damping materials, steel wire rope is widely used due to its advantages such as good elasticity, high and low temperature resistance and aging performance. However, steel wire rope also has problems such as difficulty in welding, difficulty in forming and inconvenient assembly. When used, it is usually necessary to use complex or space-consuming crimping, limiting, fixing and other fastening measures. Therefore, the anti-vibration structure using steel wire rope is generally large in size. In devices such as vehicles and aircraft where vibration exists, due to limited space and load capacity, in addition to requiring the crystal oscillator to have good vibration resistance, it is also required to have a small size. Therefore, it is necessary to simplify the vibration resistance structure as much as possible to achieve a miniaturized vibration resistance crystal oscillator.

[0004] Therefore, how to achieve miniaturization while ensuring good vibration resistance has become one of the existing technical problems that need to be solved urgently. Summary of the invention

[0005] The present invention provides an anti-vibration crystal oscillator structure, which is used to realize a miniaturized anti-vibration crystal oscillator while ensuring good vibration resistance.

[0006] In a first aspect, an anti-vibration crystal oscillator structure is provided, comprising a crystal oscillator housing and a crystal oscillator internal structure, wherein the crystal oscillator internal structure comprises three parts: an upper part, a middle part, and a lower part, wherein the upper part comprises a circuit board and a metal strip, the middle part comprises a wire rope assembly and a soft wire, and the lower part comprises a fixing groove and a metal strip; wherein,

[0007] The middle of the circuit board is a signal line and components, and the edge is a boss pad, wherein a metal pressure strip is welded on the boss pad; the fixing groove is provided on the peripheral edge of the base, and the metal pressure strip is installed in the groove; the wire rope assembly and the soft wire are installed between the circuit board and the base; the soft wire is welded between the corresponding pad of the circuit board and the corresponding lead post of the base, so as to realize the electrical signal connection between the circuit board and the lead post; the wire rope assembly includes a wire rope and a metal sleeve;

[0008] The steel wire rope adopts a ring structure, and the upper and lower ends are respectively crimped with metal sleeves. The metal sleeves of the steel wire rope are fixed in corresponding positions through metal strips on the base and the circuit board, and then welded together with the boss pad and the base groove respectively to fix the steel wire rope and flexibly support the circuit board above the base.

[0009] In one embodiment, the crystal oscillator housing includes: a base 1 and an upper cover 13; the upper cover 13 is a metal cavity structure; the base 1 is made of metal material and has four metal lead posts 11 formed by glass sintering.

[0010] In one embodiment, the lead posts 11 penetrate the base 1 and extend upward and downward respectively for signal communication inside and outside the structure; the upper cover 13 is buckled together with the base 1 and fixed by welding to form a sealed structure.

[0011] In one embodiment, the steel wire rope assembly includes a steel wire rope 3 , an upper metal sleeve 9 and a lower metal sleeve 5 .

[0012] In one embodiment, the metal strip is divided into a base strip 6 and a circuit board strip 10; the base strip 6 is an L-shaped metal strip, one end of which is fixed in the groove 4 by high-temperature solder welding or sintering, and the other end is a free end; the circuit board strip 10 is an L-shaped metal strip, one end of which is fixed on the back side pad 8 of the boss on the back side of the circuit board 2 by welding, and the other end is a free end, passing through the mechanical groove at the edge of the pad to reach the front side of the circuit board 2.

[0013] In one embodiment, the steel wire rope 3 and the soft conductor 12 are installed between the circuit board 2 and the base 1 to flexibly support the circuit board 2 above the base 1 .

[0014] In one embodiment, the length of the soft wire 12 is greater than the distance between the circuit board 2 and the base 1, and is bent into a set shape. One end is welded to the circuit board 2; the other end is welded to the end of the lead column 11 facing the inside of the structure, thereby realizing signal connectivity between the circuit board 2 and the lead column 11.

[0015] In one embodiment, the steel wire rope 3 is ring-shaped; the upper metal sleeve 9 is nested and fastened in the upper middle position of the steel wire rope 3; the lower metal sleeve 5 is nested and fastened in the lower middle position of the steel wire rope 3; the lengths of the upper metal sleeve 9 and the lower metal sleeve 5 can be adjusted according to the vibration reduction needs.

[0016] In one embodiment, the upper metal sleeve 9 of the steel wire rope 3 is sleeved on the boss front pad 7 of the circuit board 2, the upper metal sleeve 9 is pressed by the free end of the circuit board pressure strip 10, and then the upper metal sleeve 9 is welded to the boss front pad 7;

[0017] The lower metal sleeve 5 of the steel wire rope 3 is embedded in the groove 4 of the base 3 , the lower metal sleeve 5 is pressed by the free end of the base pressure strip 6 , and then the lower metal sleeve 5 and the groove 4 are welded together.

[0018] In one embodiment, two, four or more steel ropes 3 are used as required.

[0019] An anti-vibration crystal oscillator structure provided by an embodiment of the present invention comprises a crystal oscillator housing and an internal structure of the crystal oscillator, wherein the internal structure of the crystal oscillator comprises three parts: an upper part, a middle part and a lower part, wherein the upper part comprises a circuit board and a metal pressure strip, the middle part comprises a wire rope assembly and a flexible conductor, and the lower part comprises a fixing groove and a metal pressure strip; wherein the middle of the circuit board comprises signal routing and components, and the edge comprises a boss pad, wherein the metal pressure strip is welded on the boss pad; the fixing groove is provided on the peripheral edge of the base, and the metal pressure strip is installed in the groove; the wire rope assembly and the flexible conductor are installed between the circuit board and the base; The soft wire is welded between the corresponding pad of the circuit board and the corresponding lead column of the base to realize the connection of electrical signals between the circuit board and the lead column; the wire rope assembly includes a wire rope and a metal sleeve; the wire rope adopts a ring structure, and the upper and lower ends are respectively crimped with metal sleeves, and the metal sleeve of the wire rope is fixed at the corresponding position by the metal pressure strips on the base and the circuit board, and then welded together with the boss pad and the base groove respectively to fix the wire rope, and the circuit board is flexibly supported above the base. Through the above anti-vibration crystal oscillator structure, a miniaturized anti-vibration crystal oscillator is realized while ensuring good vibration resistance.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structure particularly pointed out in the written description, claims, and drawings thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 It is a schematic diagram of a general crystal oscillator structure in the background technology;

[0023] Figure 2 Schematic diagram of an anti-vibration crystal oscillator structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to realize a miniaturized anti-vibration crystal oscillator while ensuring good vibration resistance, an anti-vibration crystal oscillator structure is provided.

[0025] The preferred embodiments of the present invention are described below in conjunction with the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In addition, the embodiments of the present invention and the features in the embodiments may be combined with each other if there is no conflict.

[0026] like Figure 2 As shown, the embodiment provides an anti-vibration crystal oscillator structure, including: a crystal oscillator housing and a crystal oscillator internal structure, wherein the crystal oscillator internal structure includes three parts: upper, middle and lower parts, wherein the upper part includes a circuit board and a metal strip, the middle part includes a wire rope assembly and a soft wire, and the lower part includes a fixing groove and a metal strip; wherein,

[0027] The middle of the circuit board is a signal line and components, and the edge is a boss pad, wherein a metal pressure strip is welded on the boss pad; the fixing groove is provided on the peripheral edge of the base, and the metal pressure strip is installed in the groove; the wire rope assembly and the soft wire are installed between the circuit board and the base; the soft wire is welded between the corresponding pad of the circuit board and the corresponding lead post of the base, so as to realize the electrical signal connection between the circuit board and the lead post; the wire rope assembly includes a wire rope and a metal sleeve;

[0028] The steel wire rope adopts a ring structure, and the upper and lower ends are respectively crimped with metal sleeves. The metal sleeves of the steel wire rope are fixed in corresponding positions through metal strips on the base and the circuit board, and then welded together with the boss pad and the base groove respectively to fix the steel wire rope and flexibly support the circuit board above the base.

[0029] In one embodiment, the crystal oscillator housing includes: a base 1 and an upper cover 13; the upper cover 13 is a metal cavity structure; the base 1 is made of metal material and has four metal lead posts 11 formed by glass sintering.

[0030] In one embodiment, the lead posts 11 penetrate the base 1 and extend upward and downward respectively for signal communication inside and outside the structure; the upper cover 13 is buckled together with the base 1 and fixed by welding to form a sealed structure.

[0031] In one embodiment, the internal structure of the crystal oscillator includes three parts: upper, middle and lower. The upper part includes a circuit board 2 and a circuit board strip 10, the middle part includes a steel wire rope 3, an upper metal sleeve 9, a lower metal sleeve 5 and a soft wire 12, and the lower part includes a fixing groove 4 and a base strip 6. Multiple grooves 4 are provided on the four edges of the surface of the base facing the interior of the structure. One or more base strips 6 are installed in the grooves 4.

[0032] In one embodiment, the steel wire rope assembly includes a steel wire rope 3 , an upper metal sleeve 9 and a lower metal sleeve 5 .

[0033] In one embodiment, the metal strip is divided into a base strip 6 and a circuit board strip 10; the base strip 6 is an L-shaped metal strip, one end of which is fixed in the groove 4 by high-temperature solder welding or sintering, and the other end is a free end; the circuit board strip 10 is an L-shaped metal strip, one end of which is fixed on the back side pad 8 of the boss on the back side of the circuit board 2 by welding, and the other end is a free end, passing through the mechanical groove at the edge of the pad to reach the front side of the circuit board 2.

[0034] In one embodiment, the steel wire rope 3 and the soft conductor 12 are installed between the circuit board 2 and the base 1 to flexibly support the circuit board 2 above the base 1 .

[0035] In one embodiment, the length of the soft wire 12 is greater than the distance between the circuit board 2 and the base 1, and is bent into a set shape. One end is welded to the circuit board 2; the other end is welded to the end of the lead column 11 facing the inside of the structure, thereby realizing signal connectivity between the circuit board 2 and the lead column 11.

[0036] In one embodiment, the steel wire rope 3 is ring-shaped; the upper metal sleeve 9 is nested and fastened in the upper middle position of the steel wire rope 3; the lower metal sleeve 5 is nested and fastened in the lower middle position of the steel wire rope 3; the lengths of the upper metal sleeve 9 and the lower metal sleeve 5 can be adjusted according to the vibration reduction needs.

[0037] In one embodiment, the upper metal sleeve 9 of the steel wire rope 3 is sleeved on the boss front pad 7 of the circuit board 2, the upper metal sleeve 9 is pressed by the free end of the circuit board pressure strip 10, and then the upper metal sleeve 9 is welded to the boss front pad 7;

[0038] The lower metal sleeve 5 of the steel wire rope 3 is embedded in the groove 4 of the base 3 , the lower metal sleeve 5 is pressed by the free end of the base pressure strip 6 , and then the lower metal sleeve 5 and the groove 4 are welded together.

[0039] In one embodiment, two, four or more steel ropes 3 are used as required.

[0040] The embodiment provides an anti-vibration crystal oscillator structure to achieve the following effects:

[0041] (1) The steel wire rope, circuit board and base are fastened by a combination of pressure strip clamping and welding. The structure is simple, the space requirement is small, it is conducive to the miniaturization of the crystal oscillator, and the operation is simple and convenient. The installation is firm and stable, and the reliability is high.

[0042] (2) By adjusting the length and upper and lower spacing of the metal sleeve on the wire rope, the shape of the wire rope ring can be quickly changed, thereby improving the debugging efficiency of the wire rope vibration damper. After forming, the wire rope can maintain a stable shape by relying on the tension of the wire rope itself and the limit of the metal sleeve, and it is not easy to deform.

[0043] (3) The number and shape of the steel wire ropes can be adjusted according to the vibration reduction needs, so that the vibration resistance of the structure can be quickly adjusted, which is easy to use.

[0044] (4) Brackets or counterweights can be added to the structure as needed, and wire rope loops can be welded or crimped onto the brackets or counterweights to flexibly achieve specific vibration reduction requirements.

[0045] The anti-vibration crystal oscillator of the present invention has the characteristics of small size, anti-vibration, flexible structure, etc., can meet high anti-vibration requirements, and the overall structure is reliably connected, has high mechanical and electrical connection reliability, and can be applied to environments with obvious vibration such as vehicle-mounted and airborne. In the present invention, according to factors such as the shape of the crystal oscillator structure, the weight and size of the circuit board, the vibration magnitude and frequency, and the vibration isolation, a bracket or a counterweight block can be added to the structure to improve the flexibility of the crystal oscillator design.

[0046] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0047] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A vibration-resistant crystal oscillator structure, characterized in that: It includes a crystal oscillator shell and a crystal oscillator internal structure, wherein the crystal oscillator internal structure includes three parts: upper, middle and lower parts, wherein the upper part includes a circuit board and a metal strip, the middle part includes a wire rope assembly and a soft wire, and the lower part includes a fixing groove and a metal strip; wherein, The middle of the circuit board is a signal line and components, and the edge is a boss pad, wherein a metal pressure strip is welded on the boss pad; the fixing groove is provided on the peripheral edge of the base, and the metal pressure strip is installed in the groove; the wire rope assembly and the soft wire are installed between the circuit board and the base; the soft wire is welded between the corresponding pad of the circuit board and the corresponding lead post of the base, so as to realize the electrical signal connection between the circuit board and the lead post; the wire rope assembly includes a wire rope and a metal sleeve; The steel wire rope adopts a ring structure, and the upper and lower ends are respectively crimped with metal sleeves. The metal sleeves of the steel wire rope are fixed in corresponding positions through metal strips on the base and the circuit board, and then welded together with the boss pad and the base groove respectively to fix the steel wire rope and flexibly support the circuit board above the base.

2. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The crystal oscillator housing comprises: a base (1) and an upper cover (13); the upper cover (13) is a metal cavity structure; the base (1) is made of metal material and has four metal lead posts (11) formed by glass sintering.

3. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The lead posts (11) penetrate the base (1) and extend upward and downward respectively, and are used for signal communication inside and outside the structure; the upper cover (13) is buckled together with the base (1) and fixed by welding to form a sealed structure.

4. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The steel wire rope assembly comprises a steel wire rope (3), an upper metal sleeve (9) and a lower metal sleeve (5).

5. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The metal pressure strip is divided into a base pressure strip (6) and a circuit board pressure strip (10); the base pressure strip (6) is an L-shaped metal strip, one end of which is fixed in the groove (4) by high-temperature solder welding or sintering, and the other end is a free end; the circuit board pressure strip (10) is an L-shaped metal strip, one end of which is fixed on the back side soldering pad (8) of the boss on the back side of the circuit board (2) by welding, and the other end is a free end that passes through the mechanical through slot at the edge of the soldering pad to reach the front side of the circuit board (2).

6. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The steel wire rope (3) and the soft wire (12) are installed between the circuit board (2) and the base (1), and the circuit board (2) is flexibly supported above the base (1).

7. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The length of the soft wire (12) is greater than the distance between the circuit board (2) and the base (1), and is bent into a set shape, with one end welded to the circuit board (2); and the other end welded to an end of the lead post (11) facing the inside of the structure, thereby achieving signal connection between the circuit board (2) and the lead post (11).

8. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The steel wire rope (3) is ring-shaped; an upper metal sleeve (9) is nested and fastened in the middle of the upper part of the steel wire rope (3); a lower metal sleeve (5) is nested and fastened in the middle of the lower part of the steel wire rope (3); the lengths of the upper metal sleeve (9) and the lower metal sleeve (5) can be adjusted according to vibration reduction requirements.

9. The anti-vibration crystal oscillator structure according to claim 8, characterized in that: The upper metal sleeve (9) of the steel wire rope (3) is sleeved on the front welding pad (7) of the boss of the circuit board (2), the upper metal sleeve (9) is pressed by the free end of the circuit board pressure strip (10), and then the upper metal sleeve (9) and the front welding pad (7) of the boss are welded together; The lower metal sleeve (5) of the steel wire rope (3) is embedded in the groove (4) of the base (3), the lower metal sleeve (5) is pressed by the free end of the base pressure strip (6), and then the lower metal sleeve (5) and the groove (4) are welded together.

10. The anti-vibration crystal oscillator structure according to claim 1, characterized in that: The steel wire ropes (3) may be two, four or more in number as required.

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