A low-power quartz crystal oscillator

Abstract

This utility model relates to a low-power quartz crystal oscillator, belonging to the technical field of quartz crystal oscillator technology. The low-power quartz crystal oscillator includes a housing and an indicator assembly. The quartz crystal oscillator body is installed inside the housing, with its pins extending through the housing. The interior of the housing is evacuated to form a vacuum-sealed chamber. The indicator assembly includes a transparent strip fixedly connected to the surface of the housing, one end of which extends into the interior of the housing. A gas guide channel is provided at one end of the transparent strip, and an indicator channel communicating with the gas guide channel is provided inside the transparent strip. By setting up the indicator assembly, and utilizing the gas guide channel and the indicator channel within the transparent strip in conjunction with a slidingly connected indicator block, the vacuum state inside the housing can be visually reflected. When the housing's seal is compromised, the indicator block moves under pressure changes and crosses the warning ring, allowing maintenance personnel to quickly determine whether the airtightness is good, effectively reducing maintenance difficulty.

Description

Technical Field

[0001] This utility model relates to the field of quartz crystal oscillator technology, and in particular to a low-power quartz crystal oscillator. Background Technology

[0002] Low-power quartz crystal oscillators are designed for energy-saving scenarios, with operating current as low as microamps and supporting a wide voltage range of 1.2V to 3.3V. They are suitable for button battery-powered IoT devices, wearable medical devices, and wireless sensors, and are ideal clock sources for low-power MCUs and communication modules. Currently, low-power quartz crystal oscillators often employ a vacuum design to improve their thermal stability, thereby reducing power consumption.

[0003] However, the housing seal is easily aged or damaged due to the use environment and the manufacturing process itself, and maintenance personnel also find it difficult to effectively judge whether its airtightness is good, which increases the maintenance personnel's subsequent maintenance burden. Utility Model Content

[0004] Therefore, it is necessary to provide a low-power quartz crystal oscillator to address the problem that the housing sealing of low-power quartz crystal oscillators is difficult to test, which increases the maintenance difficulty.

[0005] A low-power quartz crystal oscillator includes: a housing and an indicator assembly, wherein a quartz crystal oscillator body is installed inside the housing, the pins of the quartz crystal oscillator body extend through the housing, and the interior of the housing is formed into a vacuum-sealed chamber by vacuuming.

[0006] In one embodiment, the indicating component includes a transparent strip fixedly connected to the surface of the housing, one end of the transparent strip extending into the interior of the housing, a venting channel being provided at one end of the transparent strip, an indicating channel communicating with the venting channel being provided inside the transparent strip, and an indicating block being slidably connected inside the indicating channel.

[0007] In one embodiment, the horizontal cross-sectional shape of the transparent strip is U-shaped, and the transparent strip is a transparent acrylic material component.

[0008] In one embodiment, the ratio of the vertical cross-sectional inner diameter of the air guide channel to that of the indicator channel is 1:2.

[0009] In one embodiment, both the indicator channel and the indicator block are cylindrical in shape, and the length ratio of the indicator channel to the indicator block is six to one.

[0010] In one embodiment, a warning ring is fixedly connected to the surface of the transparent strip, and the warning ring is disposed in the middle section of the transparent strip.

[0011] In one embodiment, the transparent strip is fixedly connected to the housing by a heat-fusion connection.

[0012] In one embodiment, a spring is fixedly connected between the indicator channel and the indicator block, and the spring is disposed on the side of the indicator block opposite to the indicator channel.

[0013] In one embodiment, the spring is always in a compressed state, and the spring is a stainless steel component.

[0014] Beneficial effects

[0015] 1. The aforementioned low-power quartz crystal oscillator, by setting an indicator component, utilizes the air guide channel and indicator channel within the transparent strip in conjunction with the slidingly connected indicator block to intuitively reflect the vacuum state inside the housing; when the housing's sealing is compromised, the indicator block moves under pressure changes and passes over the warning ring, making it easy for maintenance personnel to quickly determine whether the airtightness is good, effectively reducing maintenance difficulty;

[0016] 2. The design employs a spring and indicator block, with the spring providing a reverse pulling force when the housing is evacuated, and releasing the indicator block to the warning position only when the vacuum level is insufficient. This structure, combined with the U-shaped cross-section of the transparent strip and the cylindrical indicator channel, ensures that the indicator block responds sensitively and is not prone to jamming, thereby improving the reliability and long-term stability of vacuum status monitoring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model in a non-vacuum state;

[0020] Figure 3 This is a schematic diagram of the overall structure of this utility model under vacuum conditions;

[0021] Figure 4 This is a schematic diagram of the structure of the indicator component in this utility model;

[0022] Figure 5 This is an exploded view of the indicator component in this utility model.

[0023] Figure label:

[0024] 100. Housing; 200. Quartz crystal oscillator body; 300. Indicator assembly; 310. Transparent strip; 311. Gas guide channel; 312. Indicator channel; 320. Indicator block; 330. Warning ring; 340. Spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The following is combined Figure 1 - Figure 5 This invention describes a low-power quartz crystal oscillator.

[0027] In one embodiment, a low-power quartz crystal oscillator includes: a housing 100 and an indicator component 300. A quartz crystal oscillator body 200 is installed inside the housing 100, and the pins of the quartz crystal oscillator body 200 extend through the housing 100. The interior of the housing 100 is formed into a vacuum-sealed chamber by vacuuming.

[0028] The housing 100 includes a metal encapsulation shell and a ceramic base. The metal encapsulation shell is square in shape. While the metal encapsulation shell is sealed and connected, its interior needs to be evacuated to stabilize the oscillation frequency and reduce air damping.

[0029] The quartz crystal oscillator body 200 includes the following structure:

[0030] IC oscillation circuit: Integrated and mounted on top of a ceramic substrate, containing an amplifier and load capacitor to achieve self-excited oscillation;

[0031] Quartz crystal wafer: Integrated and mounted on top of a ceramic substrate, AT-cut, for fundamental frequency oscillation.

[0032] Electrodes: plated with silver or gold, attached to both sides of the crystal wafer, and connected to the pins via leads.

[0033] Pins: Soldered to the bottom of the IC oscillation circuit, with the bottom of the pin extending through the outside of the ceramic base. The connection between the pin and the ceramic base needs to be sealed.

[0034] The working principle of this low-power quartz crystal oscillator is as follows:

[0035] Piezoelectric effect: Quartz crystals vibrate mechanically when a voltage is applied, and vice versa, the vibration generates voltage, forming a resonance.

[0036] Oscillator circuit: The IC provides the gain and, together with the crystal and load capacitor, forms a Pierce oscillator circuit to maintain stable oscillation.

[0037] Low-power design: Optimized circuitry reduces drive levels, minimizes crystal aging, and extends battery life.

[0038] The operation process of this low-power quartz crystal oscillator is as follows:

[0039] Power-on: Connect the pins to a power supply such as 1.8~3.3V, and the IC will start. Oscillation start-up: Circuit noise excites the crystal to oscillate, which is then amplified and locked at the resonant frequency through positive feedback.

[0040] Output: A stable square wave or sine wave is output from Pin2, such as 32.768kHz, for use with the RTC.

[0041] Stable: The vacuum environment reduces the influence of temperature or air pressure, maintaining frequency accuracy of ±20ppm.

[0042] The actual model of the low-power quartz crystal oscillator is: EPSONFC-12D 32.768kHz.

[0043] Additional notes:

[0044] The purpose of vacuuming is to eliminate air damping, improve the Q factor, enhance frequency stability, reduce operating power consumption, and prevent oxidation or contamination of the crystal electrodes, thus extending their service life.

[0045] Two-pin design: simplifies circuit layout, but requires an external load capacitor; some models have built-in capacitors.

[0046] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the indicator component 300 includes a transparent strip 310 fixedly connected to the surface of the housing 100. One end of the transparent strip 310 extends into the interior of the housing 100, and an air guide channel 311 is formed at one end of the transparent strip 310. An indicator channel 312 communicating with the air guide channel 311 is formed inside the transparent strip 310, and an indicator block 320 is slidably connected inside the indicator channel 312. The horizontal cross-sectional shape of the transparent strip 310 is U-shaped. The U-shaped horizontal cross-section design can enhance the structural rigidity, facilitate the fitting with the curved surface of the housing 100, and optimize the air guide. The airflow path of channel 311 includes a transparent strip 310 made of transparent acrylic material. Transparent acrylic material has high light transmittance, facilitating observation of the positional changes of the indicator block 320, and also possesses corrosion resistance and insulation properties. The ratio of the vertical cross-sectional inner diameter of the air guide channel 311 to that of the indicator channel 312 is 1:2. This effectively limits the operating range of the indicator block 320, preventing it from entering the curved portion of the air guide channel 311 and becoming stuck. Both the indicator channel 312 and the indicator block 320 are cylindrical in shape. The length ratio of indicator block 320 to indicator 12 is 6:1. The design of matching the shape of indicator block 320 with indicator channel 312 reduces sliding friction and ensures sensitive response to pressure changes. A warning ring 330 is fixedly connected to the surface of transparent strip 310, located in the middle section of transparent strip 310. The warning ring 330 serves as a visual dividing line, quickly distinguishing between normal vacuum (indicator block 320 not crossed) and abnormal (crossed) states. Transparent strip 310 is fixedly connected to housing 100 via a heat-fusion connection. To prevent external gas from seeping in and ensure the reliability of the vacuum indicator component 300, a spring 340 is fixedly connected between the indicator channel 312 and the indicator block 320. The spring 340 is located on the side of the indicator block 320 facing away from the indicator channel 312. The spring 340 is always in a compressed state, which can provide a constant reverse tension. The indicator block 320 is released to the warning position only when the vacuum degree is insufficient (negative pressure weakens). The spring 340 is a stainless steel component. Stainless steel has fatigue resistance and corrosion resistance, ensuring that the elastic coefficient remains stable after long-term compression.

[0047] Working principle: During the vacuuming process of the housing 100, internal air is discharged through the air guide channel 311, causing a decrease in air pressure in the indicator channel 312. At this time, the negative pressure will pull the indicator block 320 in the opposite direction, while the spring 340 applies a pulling force to the indicator block 320. When the negative pressure exceeds the pulling force of the spring 340, the indicator block 320 will slide along the indicator channel 312 towards the warning ring 330 until it passes the warning ring 330 and contacts the vertical inner wall of the indicator channel 312. At this time, the operator can then properly seal the housing 100.

[0048] It should be noted that the housing 100 and the quartz crystal oscillator body 200 mentioned above are devices with relatively mature existing technology. The specific models can be selected according to actual needs, and will not be elaborated here.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low power consumption quartz crystal oscillator, characterized by comprising: include: A housing (100) is provided, inside which a quartz crystal oscillator body (200) is installed, the pins of the quartz crystal oscillator body (200) extend through the housing (100), and the interior of the housing (100) is formed into a vacuum-sealed chamber by vacuuming. An indicator component (300) includes a transparent strip (310) fixedly connected to the surface of a housing (100). One end of the transparent strip (310) extends into the interior of the housing (100). An air guide channel (311) is provided at one end of the transparent strip (310). An indicator channel (312) communicating with the air guide channel (311) is provided inside the transparent strip (310). An indicator block (320) is slidably connected inside the indicator channel (312).

2. The low power quartz crystal oscillator of claim 1, wherein, The horizontal cross-sectional shape of the transparent strip (310) is U-shaped, and the transparent strip (310) is a transparent acrylic material component.

3. The low power quartz crystal oscillator of claim 1, wherein, The ratio of the vertical cross-sectional inner diameter of the air guide channel (311) to that of the indicator channel (312) is 1:

2.

4. The low power quartz crystal oscillator of claim 1, wherein, The indicator channel (312) and the indicator block (320) are both cylindrical in shape, and the length ratio of the indicator channel (312) to the indicator block (320) is six to one.

5. The low power quartz crystal oscillator of claim 1, wherein, A warning ring (330) is fixedly connected to the surface of the transparent strip (310), and the warning ring (330) is located in the middle section of the transparent strip (310).

6. The low power quartz crystal oscillator of claim 1, wherein, The transparent strip (310) is fixedly connected to the shell (100) by heat fusion.

7. The low power consumption quartz crystal oscillator according to claim 1, wherein A spring (340) is fixedly connected between the indicator channel (312) and the indicator block (320), and the spring (340) is disposed on the side of the indicator block (320) facing away from the indicator channel (312).

8. The low power quartz crystal oscillator of claim 7, wherein, The spring (340) is always in a compressed state, and the spring (340) is a stainless steel component.

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