Automatic frequency trimming device in quartz crystal oscillator production

Abstract

This utility model discloses an automated frequency fine-tuning device for quartz crystal oscillator production, relating to the field of quartz crystal oscillator technology. It includes a clamping pad with a groove on its top surface for holding the crystal body. A through hole is provided at the bottom of the groove, connecting to the air inlet of a negative pressure device. An air inlet is connected to the air outlet of the negative pressure device. When gas enters the negative pressure device through the inner wall of the through hole, gas inside the negative pressure device enters the air inlet. This utility model uses a limiting plate to guide the airflow. Part of the airflow is guided through the curved end to the perimeter of the top surface of the crystal body, thus pressing down and limiting its position. Another part of the airflow is guided through the horizontal end to the side of the crystal body, thus limiting its position. This achieves stable, precise, and non-physically damaged omnidirectional limiting and fixing of the crystal body, providing a fundamental guarantee for the accuracy of subsequent frequency fine-tuning and cutting, and improving efficiency.

Description

Technical Field

[0001] This utility model relates to the field of quartz crystal oscillator technology, specifically to an automated frequency fine-tuning device in the production of quartz crystal oscillators. Background Technology

[0002] A quartz resonator is a device that utilizes the principle that the crystal resonates due to the piezoelectric effect when the frequency of an electrical signal equals the natural frequency of the quartz crystal. It is a key component of crystal oscillators and narrowband filters. Although quartz resonators vary in shape, size, and frequency, their basic structural principles are the same. In order to improve the stability and reliability of quartz crystal operation, the outer shell of the quartz resonator is sealed and evacuated or filled with nitrogen.

[0003] Laser cutting is a key process in the production of quartz resonators. Its core function is to precisely fine-tune the frequency of the quartz resonator to ensure that the product can meet the preset frequency performance indicators.

[0004] Currently, traditional mechanical clamping methods are commonly used for holding quartz crystals in laser cutting operations. However, this method has significant limitations in practical applications: uneven distribution of clamping force and insufficient contact precision between the clamping components and the crystal surface can easily lead to positioning deviations in the quartz crystal. Positioning accuracy is fundamental to laser cutting; once the crystal positioning deviates, the laser beam's cutting position will also deviate from the preset trajectory, directly causing a cutting position offset. This offset will prevent the frequency adjustment of the quartz resonator from achieving the expected results, ultimately leading to frequency adjustment failure. This not only affects the product's yield rate but also increases production costs and time. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automated frequency fine-tuning device for the production of quartz crystal oscillators.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] An automated frequency fine-tuning device for quartz crystal oscillator production includes:

[0008] The clamping pad has a groove on its top surface for placing the crystal body, and a through hole at the bottom of the groove, which is connected to the air inlet of a negative pressure device.

[0009] The air inlet is externally connected to the air outlet of the negative pressure device. When the gas inside the through hole enters the negative pressure device, the gas inside the negative pressure device enters the air inlet.

[0010] Limit plate, including:

[0011] The curved end is disposed on the top surface of the clamping pad, and the concave surface of the curved end corresponds to the air inlet, with one end of the curved end facing the surface of the crystal body.

[0012] A horizontal end, which is fixedly installed at the other end of the curved end, with the other end of the horizontal end facing the side surface of the crystal body;

[0013] The gas impact blows to the curved end, flows to both sides on the surface of the curved end, and is guided by the curved end and the horizontal end to the top and side surfaces of the crystal body.

[0014] Preferably, the center of the concave surface at the curved end corresponds to the center of the air intake at the air inlet.

[0015] Preferably, the bending angle of the curved end is 30°-60°.

[0016] Preferably, the curved end facing the crystal surface is located on the periphery of the crystal, and the angle between the curved end and the crystal surface is 60°-90°.

[0017] Preferably, the end of the horizontal end facing the crystal side surface is provided with an inclined guide surface, and the angle between the inclined guide surface and the horizontal direction is 15-30°.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The limiting plate guides the wind force. Part of the wind is guided through the curved end to the four sides of the top surface of the crystal body, thereby pressing down and limiting it. Part of the wind is guided through the horizontal end to the side of the crystal body, thereby limiting the position of the crystal body. This achieves stable, precise and non-physical damage-free all-round limiting and fixing of the crystal body, providing a basic guarantee for the accuracy of subsequent frequency fine-tuning and cutting, and improving efficiency. Attached Figure Description

[0020] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the disassembled three-dimensional structure of this utility model.

[0024] The diagram is labeled as follows: 1. Clamping pad; 2. Limiting plate; 21. Curved end; 22. Horizontal end; 3. Air inlet; 4. Crystal body. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] Example

[0027] like Figure 1-3 As shown, the automated frequency fine-tuning device in the production of quartz crystal oscillators includes:

[0028] The clamping pad 1 has a groove on its top surface for placing the crystal body 4, and a through hole at the bottom of the groove, which is connected to the air inlet of a negative pressure device.

[0029] The air inlet 3 is externally connected to the air outlet of the negative pressure device. When the gas inside the through hole enters the negative pressure device, the gas inside the negative pressure device enters the air inlet 3.

[0030] Limiting plate 2 includes:

[0031] The curved end 21 is provided on the top surface of the clamping pad 1, and the concave surface of the curved end 21 corresponds to the air inlet 3. One end of the curved end 21 faces the surface of the crystal body 4.

[0032] The horizontal end 22 is fixedly installed at the other end of the curved end 21, and the other end of the horizontal end 22 faces the side surface of the crystal body 4.

[0033] Among them, the gas impact blows to the curved end 21, flows to both sides on the surface of the curved end 21, and is guided by the curved end 21 and the horizontal end 22 to the top surface and side surface of the crystal body 4.

[0034] Specifically, when it is necessary to limit the crystal body 4, the crystal body 4 is first placed directly inside the groove. At this time, the external negative pressure device is activated to extract the gas inside the through hole, thereby forming a vacuum area below the crystal body 4, thus limiting the crystal body 4 under vacuum.

[0035] Specifically, when the aforementioned negative pressure device limits the crystal body 4, the gas extracted by the negative pressure device is directly blown onto the surface of the limiting plate 2 through the outlet end. The gas impacting the limiting plate 2 moves to both sides of the limiting plate 2. The gas at one end is guided by the curved end 21 of the limiting plate 2, and is directly guided to the top of the crystal body 4 along the curved end 21. Then it is blown out through the end, thus blowing onto the upper surface of the crystal body 4, thereby generating a downward pressure on the crystal body 4, thereby pushing the crystal body 4 to conform to the inner wall of the groove. Another portion of the gas is guided directly to the horizontal end 22 through the curved end 21. The gas at the horizontal end 22 is then guided directly to the side surface of the crystal body 4, thereby blowing around the crystal body 4. This, combined with the downward blowing gas from above, effectively limits the movement of the crystal body 4, keeping it always in the center. This achieves stable, precise, and non-physically damaging all-around positioning and fixing of the crystal body 4, providing a fundamental guarantee for the accuracy of subsequent frequency fine-tuning and cutting, and improving efficiency.

[0036] In this implementation example: the center of the concave surface of the curved end 21 corresponds to the center of the air intake of the air inlet 3.

[0037] Specifically, the gas discharged from the air inlet 3 is concentrated. When the center of the concave surface of the curved end 21 corresponds to the center of the air inlet 3, the airflow can impact the "core guiding area" of the curved end 21 vertically and directly. The arc structure of the concave surface itself has the function of "converging and diverting" the airflow. The center alignment can make the airflow evenly dispersed to both sides of the curved end 21, avoiding the problem of strong airflow on one side and weak airflow on the other side due to the offset of the impact position. This ensures the accuracy of the airflow impact and the energy utilization rate, and strengthens the limiting stability of the crystal body 4.

[0038] In this implementation example: the bending angle of the curved end 21 is 30°-60°.

[0039] Specifically, if the bend angle is close to straight, such as 10°-20°, the "concave guiding effect" of the bend end 21 will weaken the airflow impact on the surface, making it easier for the airflow to "skim" over the bend end 21 in an approximately straight direction. This makes it difficult to effectively split the airflow into two streams: one guiding it to the upward surface and the other guiding it to the horizontal end 22. This may result in a large amount of gas being lost without acting on the crystal, leading to low airflow utilization and insufficient airflow pressure on the upper and side surfaces, failing to form effective auxiliary limiting. If the bend angle is too steep, such as 70°-90°, the bend end 21 will approach a "right-angle bend." After the airflow impacts, turbulent flow is easily formed on the inside of the bend. Some airflow may be "rebounded" or "stuck" due to the sudden angle change, not only reducing guiding efficiency but also potentially generating reverse airflow that interferes with the stability of vacuum adsorption. The bend in this angle range is "gentle and has clear directional properties." The arc shape allows the airflow to be naturally diverted along the arc surface after impact, with one part smoothly guided to the upper surface and the other part transitioning to the horizontal end 22 along the arc surface. This reduces turbulence and airflow loss, ensuring that the airflow can be efficiently guided to the target position on the upper and side surfaces of the crystal, while forming a suitable force to avoid limiting failure or crystal damage due to improper angle.

[0040] In this embodiment: the end of the curved end 21 facing the crystal surface is located on the four sides of the crystal, and the angle between the end and the crystal surface is 60°-90°.

[0041] Specifically, the end is not directly facing the crystal center. This avoids the airflow impacting the top center of the crystal vertically, which could cause airflow disturbance and affect the fine-tuning accuracy, or lead to uneven force in the central area, such as slight deformation of the crystal center. Instead, it acts on the "surrounding surfaces". This can both create downward overall pressure through the edge force to push the crystal to fit the groove, and avoid the sensitive central area, ensuring the stability of the fine-tuning area. This ensures that the airflow can act on the crystal surface at an appropriate angle and force, strengthening the limiting stability while avoiding damage to the crystal from airflow impact.

[0042] In this embodiment: the horizontal end 22 facing the crystal side surface is provided with an inclined guide surface, and the angle between the inclined guide surface and the horizontal direction is 15-30°.

[0043] Specifically, the 15°-30° inclined guide surface can guide the airflow at the horizontal end 22 to blow it "obliquely upward" towards the side surface of the crystal. When the crystal is biased to one side due to placement deviation, the airflow guided by the inclined guide surface on that side will generate a "obliquely upward push" resultant force on the side surface of the crystal: the horizontal component directly pushes the crystal towards the center, while the upward component can offset part of the downward pressure of vacuum adsorption, reduce the friction between the crystal and the inner wall of the groove, and make it easier for the crystal to be "corrected back to the center position" under the action of the horizontal pushing force. This allows the lateral airflow to act on the side surface of the crystal at a more suitable angle, which enhances the center positioning accuracy while avoiding lateral damage to the crystal caused by airflow impact.

[0044] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. An automated frequency fine-tuning device for quartz crystal oscillator production, characterized in that: include: The clamping pad has a groove on its top surface for placing the crystal body, and a through hole at the bottom of the groove, which is connected to the air inlet of a negative pressure device. The air inlet is externally connected to the air outlet of the negative pressure device. When the gas inside the through hole enters the negative pressure device, the gas inside the negative pressure device enters the air inlet. Limit plate, including: The curved end is disposed on the top surface of the clamping pad, and the concave surface of the curved end corresponds to the air inlet, with one end of the curved end facing the surface of the crystal body. A horizontal end, which is fixedly installed at the other end of the curved end, with the other end of the horizontal end facing the side surface of the crystal body; The gas impact blows to the curved end, flows to both sides on the surface of the curved end, and is guided by the curved end and the horizontal end to the top and side surfaces of the crystal body.

2. The automated frequency fine-tuning device for quartz crystal oscillator production according to claim 1, characterized in that: The center of the concave surface at the curved end corresponds to the center of the air intake at the air inlet.

3. The automated frequency fine-tuning device for quartz crystal oscillator production according to claim 2, characterized in that: The bending angle of the curved end is 30°-60°.

4. The automated frequency fine-tuning device for quartz crystal oscillator production according to claim 3, characterized in that: The curved end facing the crystal surface is located on the surrounding surface of the crystal, and the angle between the curved end and the crystal surface is 60°-90°.

5. The automated frequency fine-tuning device for quartz crystal oscillator production according to claim 4, characterized in that: An inclined guide surface is provided at one end of the horizontal end facing the side surface of the crystal, and the angle between the inclined guide surface and the horizontal direction is 15-30°.

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