Vacuum oven applied to crystal oscillator assembly

Abstract

The utility model provides a kind of vacuum oven applied to crystal oscillator assembly, a kind of vacuum oven applied to crystal oscillator assembly, comprising: vacuum oven body, fixedly installed with fixed box on vacuum oven body, fixed box inside is provided with placing mechanism, and placing mechanism is placed with crystal oscillator assembly;Fixedly installed with adjusting mechanism on fixed box left side, adjusting mechanism is connected with placing mechanism, fixedly installed with first pressing plate on vacuum oven body, in the process that vacuum oven body is closed, first pressing plate will extrude heat dissipation fan drive placing mechanism to return fixed box inside, and in the process that vacuum oven body is opened and closed, automatically extend to fixed box outside side, first pressing plate moves with box door and extrudes heat dissipation fan, heat dissipation fan is driven to move downwards by sliding column with sliding plate, sliding plate compresses first spring, simultaneously, by connecting column, ceramic placing disc is retracted into fixed box inside, ensure that crystal oscillator assembly is in high temperature environment in vacuum oven body during baking process.

Description

Technical Field

[0001] This utility model relates to the field of vacuum oven technology, specifically to a vacuum oven applied to crystal oscillator assemblies. Background Technology

[0002] Crystal oscillator assemblies are typically composed of multiple precision electronic components. These components undergo rigorous baking processes during production to remove moisture and impurities, improve their stability and reliability, and ensure their performance in subsequent use.

[0003] However, traditional baking equipment has some problems in actual use, especially in the cooling and removal stages after baking. Specifically, after high-temperature baking, the surface temperature of the crystal oscillator assembly is extremely high, typically reaching around 150°C to 200°C. At this high temperature, direct contact with the crystal oscillator assembly can cause burns to operators, increasing safety risks. To avoid burns, operators usually need to wear heat-resistant gloves or use tools to remove the crystal oscillator assembly. However, using heat-resistant gloves can affect the operator's hand dexterity, making handling inconvenient and reducing production efficiency; using tools may cause damage such as collisions or squeezing due to insufficient precision, affecting product quality.

[0004] Furthermore, the complex structure of the crystal oscillator assembly, and the potential for adhesion to the rack or tray due to thermal expansion during baking, makes removal more difficult. This not only reduces production efficiency but may also damage the crystal oscillator assembly during removal, affecting product quality.

[0005] Therefore, we propose a vacuum oven for use in crystal oscillator assemblies. Utility Model Content

[0006] This invention provides a vacuum oven for crystal oscillator assemblies. The crystal oscillator assembly is placed on a ceramic tray. When the oven door is closed, a first pressure plate compresses a cooling fan, and a sliding column causes the ceramic tray to retract into a fixed box, where a vacuum is created for heating and baking. Upon opening the oven door, a first spring returns to its original position, the ceramic tray is removed, the cooling fan dissipates heat, and the height of the motor is adjustable. A sliding plate moves, driving airflow circulation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vacuum oven for crystal oscillator assemblies, comprising: a vacuum oven body, a fixing box fixedly installed on the vacuum oven body, a placement mechanism provided inside the fixing box, and a crystal oscillator assembly placed on the placement mechanism;

[0008] An adjustment mechanism is fixedly installed on the left side of the fixed box. The adjustment mechanism is connected to the placement mechanism. A first pressure plate is fixedly installed on the vacuum oven body. During the closing process of the vacuum oven body, the first pressure plate will squeeze the heat dissipation fan to drive the placement mechanism back into the fixed box. During the opening and closing process of the vacuum oven body, it will automatically extend to the outside of the fixed box.

[0009] Preferably, the placement mechanism includes a partition, which is fixedly connected to a fixed box. A ceramic placement tray is provided above the fixed box for placing the crystal oscillator assembly. A connecting column is fixedly connected to the bottom of the ceramic placement tray, and a sliding plate is fixedly connected to the bottom of the connecting column.

[0010] Preferably, the adjustment mechanism includes a mounting box, which is fixedly connected to a fixed box. A motor is fixedly connected to the mounting box, and a first bevel gear is fixedly connected to the power output shaft of the motor. A second bevel gear meshes with the first bevel gear, and a reciprocating screw is fixedly connected to the second bevel gear. The reciprocating screw is rotatably connected to the mounting box, and a threaded plate is threadedly connected to the reciprocating screw. A first spring is fixedly connected to the threaded plate, and the top of the first spring is fixedly connected to a sliding plate.

[0011] Preferably, the adjustment mechanism further includes a sliding column, which is slidably connected to the mounting box, fixedly connected to the sliding plate, and fixedly connected to the cooling fan.

[0012] Preferably, a plurality of first one-way air guide tubes are fixedly connected in the middle of the partition. When the slide plate moves upward, it will compress the gas and discharge it from the first one-way air guide tubes and act on the ceramic placement plate.

[0013] Preferably, a plurality of connecting posts are fixedly connected to the partition, a plurality of through holes are formed on the connecting posts, a pressing plate is slidably connected to the connecting posts, a second spring is fixedly connected to the bottom of the pressing plate, the second spring is fixedly connected to the fixing box, a pull rope is fixedly connected to the pressing plate, and the pull rope is fixedly connected to the sliding plate.

[0014] The beneficial effects of this utility model are as follows:

[0015] The first pressure plate moves with the oven door and squeezes the cooling fan. The cooling fan drives the sliding plate to move downward through the sliding column. The sliding plate compresses the first spring and at the same time, the ceramic placement tray is put into the fixed box through the connecting column, ensuring that the crystal oscillator assembly is in a high-temperature environment inside the vacuum oven body during the baking process.

[0016] The first pressure plate moves away from the cooling fan, and the first spring, which has lost its squeezing effect, returns to its original position. The spring force pushes the slide plate upward, and the slide plate, through the connecting column, drives the ceramic placement tray to automatically move out of the fixing box. At the same time, the cooling fan starts to blow air to cool the ceramic placement tray and the crystal oscillator assembly. The pick-and-place preparation can be completed without manual contact with the high-temperature area.

[0017] After the motor starts, the power output shaft drives the first bevel gear to rotate, and the first bevel gear meshes with the second bevel gear to rotate synchronously. The second bevel gear drives the reciprocating screw to rotate in the mounting box, and the threaded plate moves up and down along the reciprocating screw. It is connected to the slide plate through the first spring, which in turn pushes the slide plate to adjust the height of the ceramic placement tray. The position of the placement tray can be flexibly controlled according to the crystal oscillator size, which is convenient for picking and placing.

[0018] As the slide moves, it pulls the cord, causing the extrusion plate to slide on the connecting post. The extrusion plate compresses the gas inside the fixing box, which then enters the connecting post through a through-hole and exits from the same hole. This, combined with the first one-way air guide pipe on the partition and the one-way air inlet pipe on the side of the fixing box, creates an airflow circulation. During baking, the airflow helps maintain a uniform temperature inside the chamber; during cooling, it accelerates the airflow over the ceramic placement tray and crystal oscillator assembly surfaces, achieving rapid heat dissipation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a vacuum oven for crystal oscillator assemblies proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the fixing box of a vacuum oven used in crystal oscillator assemblies according to the present invention;

[0022] Figure 3 This utility model Figure 2 Enlarged schematic diagram of part A;

[0023] Figure 4 This is a schematic diagram of the connection structure between the extrusion plate and the fixing box of a vacuum oven for crystal oscillator assemblies, as proposed in this utility model.

[0024] Figure 5 This utility model Figure 4 Enlarged schematic diagram of part B;

[0025] Numbered in the diagram: 1. Vacuum oven body; 2. Pressure plate; 3. Cooling fan; 4. Sliding column; 5. Mounting box; 6. Motor; 7. Fixing box; 8. Pull rope; 9. Ceramic placement tray; 10. Connecting column; 11. Partition; 12. First one-way air guide pipe; 13. Slide plate; 14. First bevel gear; 15. Second bevel gear; 16. Threaded plate; 17. Reciprocating lead screw; 18. First spring; 19. Extrusion plate; 20. Second spring; 21. Through hole. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] according to Figure 1 - Figure 5 As shown, a vacuum oven for crystal oscillator assemblies includes a vacuum oven body 1, a fixing box 7 fixedly installed on the vacuum oven body 1, a placement mechanism provided inside the fixing box 7, and a crystal oscillator assembly placed on the placement mechanism.

[0028] An adjustment mechanism is fixedly installed on the left side of the fixed box 7. The adjustment mechanism is connected to the placement mechanism. A first pressure plate 2 is fixedly installed on the vacuum oven body 1. During the closing process of the vacuum oven body 1, the first pressure plate 2 will squeeze the heat dissipation fan 3 to drive the placement mechanism back into the fixed box 7. During the opening and closing process of the vacuum oven body 1, it will automatically extend to the outside of the fixed box 7.

[0029] It should be noted that when we need to bake the crystal oscillator assembly, we should place the cleaned crystal oscillator assembly neatly on the placement mechanism, taking care to avoid collisions and stacking, and ensuring that each crystal oscillator assembly can be heated evenly.

[0030] When the door of the vacuum oven is closed, the first pressure plate 2 will squeeze the cooling fan 3, causing the placement mechanism to return to the fixed box 7. The vacuum pump will then start to evacuate the oven. Typically, the vacuum level needs to be evacuated to a certain value, such as around -0.1 MPa, to reduce the air pressure and moisture inside the oven.

[0031] While maintaining the vacuum state, start the heating system and gradually increase the temperature inside the chamber according to the set heating rate; the heating rate is generally controlled at about 1°C to 3°C per minute to avoid excessively rapid heating that could increase stress inside the crystal oscillator assembly.

[0032] When the temperature inside the chamber reaches the set baking temperature, such as around 150°C to 200°C, maintain this temperature for constant baking. The baking time usually depends on the specific situation of the crystal oscillator assembly, generally around 4 hours from the first pressure plate 2 to the sliding column. During the baking process, the vacuum pump works continuously to maintain the vacuum level inside the chamber.

[0033] After the constant temperature baking is completed, stop heating and turn off the vacuum pump to allow the temperature inside the oven to drop naturally. Alternatively, the oven door of the vacuum oven body 1 can be opened as needed. After the door is opened, the placement mechanism will move the crystal oscillator assembly out of the fixed box 7, and the cooling fan 3 will also start simultaneously to continuously cool the crystal oscillator assembly, accelerate the cooling of the crystal oscillator assembly, and facilitate the removal of the crystal oscillator assembly.

[0034] The placement mechanism includes a partition 11, which is fixedly connected to a fixed box 7. A ceramic placement tray 9 is provided above the fixed box 7. The ceramic placement tray 9 is used to place the crystal oscillator assembly. A connecting column 10 is fixedly connected to the bottom of the ceramic placement tray 9, and a sliding plate 13 is fixedly connected to the bottom of the connecting column 10.

[0035] The adjustment mechanism includes a mounting box 5, which is fixedly connected to a fixed box 7. A motor 6 is fixedly connected to the mounting box 5. A first bevel gear 14 is fixedly connected to the power output shaft of the motor 6. A second bevel gear 15 meshes with the first bevel gear 14. A reciprocating screw 17 is fixedly connected to the second bevel gear 15. The reciprocating screw 17 is rotatably connected to the mounting box 5. A threaded plate 16 is threadedly connected to the reciprocating screw 17. A first spring 18 is fixedly connected to the threaded plate 16. The top of the first spring 18 is fixedly connected to the slide plate 13.

[0036] The adjustment mechanism also includes a sliding column 4, which is slidably connected to the mounting box 5, fixedly connected to the slide plate 13, and fixedly connected to the cooling fan 3.

[0037] It should be noted that when the first pressure plate 2 presses down to the cooling fan 3, it will squeeze the cooling fan 3, causing the cooling fan 3 to drive the slide plate 13 to move down through the sliding column 4. The sliding plate 13 will squeeze the reciprocating screw 17, thus playing a role in accumulating force. When the door on the vacuum oven body 1 is closed, the ceramic placement tray 9 will be completely inside the fixed box 7, which facilitates the vacuum drying of the vacuum oven body 1. When the door is opened, the first pressure plate 2 on the door will also move, thus losing the squeezing of the cooling fan 3. As a result, the cooling fan 3 returns to its original position under the action of the first spring 18, allowing the ceramic placement tray 9 to be moved out of the fixed box 7, which facilitates the removal of the ceramic placement tray 9. At this time, the cooling fan 3 can be started to accelerate the heat dissipation of the ceramic placement tray 9, ensuring that the heat can be dissipated quickly.

[0038] Furthermore, the motor 6 controls the reciprocating screw 17 to rotate via the first bevel gear 14 and the second bevel gear 15. The rotation of the reciprocating screw 17 causes the threaded plate 16 to move up and down continuously. When the threaded plate 16 moves up, it continuously compresses the first spring 18, thereby making the ceramic placement tray 9 further away from the fixed box 7. This effectively controls the position of the ceramic placement tray 9 according to actual needs, making it convenient for users to pick it up.

[0039] Multiple first one-way air guide tubes 12 are fixedly connected in the middle of the partition 11. When the slide plate 13 moves upward, it will squeeze the gas out from the first one-way air guide tubes 12 and act on the ceramic placement plate 9.

[0040] Multiple connecting posts 10 are fixedly connected to the partition 11. Multiple through holes 21 are opened through the connecting posts 10. A pressing plate 19 is slidably connected to the connecting posts 10. A second spring 20 is fixedly connected to the bottom of the pressing plate 19. The second spring 20 is fixedly connected to the fixing box 7. A pull rope 8 is fixedly connected to the pressing plate 19. The pull rope 8 is fixedly connected to the slide plate 13.

[0041] It should be noted that multiple one-way air inlets are also installed on the side of the fixing box 7. When the slide plate 13 moves, it will continuously pull the pull rope 8. The pulling of the pull rope 8 will cause the compression plate 19 to move. The movement of the compression plate 19 can compress the gas in the fixing box 7 and enter the connecting column 10 through the through hole 21. Finally, the gas is discharged through the through hole 21, which accelerates the air flow at the ceramic placement plate 9 and accelerates the heat dissipation at the ceramic placement plate 9.

[0042] Working principle:

[0043] When the crystal oscillator assembly needs to be baked, it is placed on the ceramic placement tray 9. The door of the vacuum oven body 1 is closed. The first pressure plate 2 on the door presses against the cooling fan 3. The cooling fan 3, through the sliding column 4, moves the sliding plate 13 downwards. The sliding plate 13 compresses the first spring 18 and, through the connecting column 10, causes the ceramic placement tray 9 to retract into the fixing box 7. At this time, the vacuum pump is started to create a vacuum, and the heating system heats up for baking. After baking, the door is opened. The first pressure plate 2 no longer presses against the cooling fan 3, the first spring 18 returns to its original position, pushing the sliding plate 13 upwards, causing the ceramic placement tray 9 to move out of the fixing box 7. The cooling fan 3 then starts to dissipate heat from the crystal oscillator assembly, making it easy to remove.

[0044] After the motor 6 is started, its power output shaft drives the first bevel gear 14 to rotate. The first bevel gear 14 meshes with the second bevel gear 15 to make it rotate. The second bevel gear 15 drives the reciprocating screw 17 to rotate inside the mounting box 5. The threaded plate 16 moves up and down along the reciprocating screw 17, and pushes the slide plate 13 through the first spring 18, thereby adjusting the height of the ceramic placement tray 9 to meet the needs of picking up and placing crystal oscillator assemblies of different sizes.

[0045] When the slide plate 13 moves, it pulls the pull rope 8, which in turn causes the compression plate 19 to slide on the connecting column 10. The compression plate 19 compresses the gas inside the fixed box 7. The gas enters the connecting column 10 through the through hole 21 and then exits through the through hole 21. At the same time, the first one-way air guide pipe 12 on the partition plate 11 prevents backflow of outside air during baking and assists in exhaust during cooling. It works in conjunction with the one-way air inlet pipe on the side of the fixed box 7 to form an airflow circulation. During baking, it helps maintain a uniform temperature inside the box, and during cooling, it accelerates heat dissipation.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A vacuum oven for use in crystal oscillator assemblies, characterized in that, include: Vacuum oven body (1), a fixed box (7) is fixedly installed on the vacuum oven body (1), a placement mechanism is provided inside the fixed box (7), and a crystal oscillator assembly is placed on the placement mechanism; An adjustment mechanism is fixedly installed on the left side of the fixed box (7). The adjustment mechanism is connected to the placement mechanism. A first pressure plate (2) is fixedly installed on the vacuum oven body (1). During the closing process of the vacuum oven body (1), the first pressure plate (2) will squeeze the heat dissipation fan (3) to drive the placement mechanism back into the fixed box (7). During the opening and closing process of the vacuum oven body (1), it will automatically extend to the outside of the fixed box (7).

2. The vacuum oven for crystal oscillator assemblies according to claim 1, characterized in that: The placement mechanism includes a partition (11), which is fixedly connected to a fixed box (7). A ceramic placement tray (9) is provided above the fixed box (7). The ceramic placement tray (9) is used to place the crystal oscillator assembly. A connecting column (10) is fixedly connected to the bottom of the ceramic placement tray (9). A sliding plate (13) is fixedly connected to the bottom of the connecting column (10).

3. A vacuum oven for crystal oscillator assemblies according to claim 2, characterized in that: The adjustment mechanism includes a mounting box (5), which is fixedly connected to a fixed box (7). A motor (6) is fixedly connected to the mounting box (5). A first bevel gear (14) is fixedly connected to the power output shaft of the motor (6). A second bevel gear (15) meshes with the first bevel gear (14). A reciprocating screw (17) is fixedly connected to the second bevel gear (15). The reciprocating screw (17) is rotatably connected to the mounting box (5). A threaded plate (16) is threadedly connected to the reciprocating screw (17). A first spring (18) is fixedly connected to the threaded plate (16). The top of the first spring (18) is fixedly connected to a sliding plate (13).

4. A vacuum oven for crystal oscillator assemblies according to claim 3, characterized in that: The adjustment mechanism also includes a sliding column (4), which is slidably connected to the mounting box (5), fixedly connected to the sliding plate (13), and fixedly connected to the cooling fan (3).

5. A vacuum oven for crystal oscillator assemblies according to claim 4, characterized in that: The partition (11) has multiple first one-way air guide tubes (12) fixedly connected in the middle. When the slide plate (13) moves upward, it will squeeze the gas out from the first one-way air guide tubes (12) and act on the ceramic placement plate (9).

6. A vacuum oven for crystal oscillator assemblies according to claim 5, characterized in that: Multiple connecting posts (10) are fixedly connected to the partition (11). Multiple through holes (21) are opened through the connecting posts (10). A pressing plate (19) is slidably connected to the connecting posts (10). A second spring (20) is fixedly connected to the bottom of the pressing plate (19). The second spring (20) is fixedly connected to the fixing box (7). A pull rope (8) is fixedly connected to the pressing plate (19). The pull rope (8) is fixedly connected to the sliding plate (13).

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