Automatic door opening device for tin paste storage refrigerator

Abstract

This invention discloses an automatic door opening device for a solder paste storage refrigerator: a timer control component is used to set the running time and generate and send a control signal to a mechanical push rod component when the set running time is reached; the mechanical push rod component is used to receive the control signal sent by the timer control component and perform a linear pushing action, with its pushing end acting on the refrigerator door of the solder paste storage refrigerator to push the refrigerator door open; the device housing component is used to accommodate and fix the timer control component and the mechanical push rod component, and the entire device is detachably installed on the refrigerator body of the solder paste storage refrigerator. This invention realizes the automatic opening of the refrigerator door at a timed interval, saves manpower, and has a simple structure and is easy to install.

Description

Technical Field

[0001] This invention belongs to the field of solder paste storage in the electronics manufacturing industry, and more specifically, it relates to an automatic door opening device for a solder paste storage refrigerator. Background Technology

[0002] In the electronics manufacturing industry, such as SMT (Surface Mount Technology) production lines, solder paste is an indispensable soldering material, widely used in the production of electronic products such as mobile phones, computers, and tablets. The storage environment of solder paste has a crucial impact on its performance. To ensure the soldering activity and stability of solder paste, it is usually required to be stored in a low-temperature freezer, with the relative humidity inside the freezer controlled below 60%RH. If the humidity is too high, the solder paste easily absorbs moisture from the air, causing quality defects such as porosity, spatter, and cold solder joints during subsequent reflow soldering, thus directly affecting the soldering quality and long-term reliability of electronic products.

[0003] In actual production processes, solder paste cannot be used immediately after being removed from the refrigerator. Instead, it needs to be left to warm up at room temperature for 2-4 hours to allow the internal temperature of the solder paste to match the ambient temperature. This prevents condensation on the surface of the solder paste due to excessive temperature differences, which could lead to moisture absorption problems. Furthermore, during the solder paste warming period, the refrigerator often accumulates high humidity due to its long-term closed operation. If the solder paste is removed directly, condensation can easily form on the surface of the solder paste packaging. Therefore, operators need to open the refrigerator door 2-4 hours before the warming process begins to allow air circulation between the refrigerator and the workshop environment, dispersing internal moisture and creating a suitable environment for removing the solder paste.

[0004] However, the above operations rely entirely on manual operation to open the door in advance, which requires operators to arrive 2 to 4 hours before the work officially begins. This significantly increases labor costs and time burden, and there are also problems such as untimely door opening and insufficient warm-up time due to human negligence or improper scheduling, which affect the stability of the production cycle and the consistency of solder paste use.

[0005] Currently, existing solder paste storage equipment mainly focuses on optimizing temperature control functions, but lacks automated devices that automatically open the refrigerator door to dehumidify before the solder paste warms up. This makes it difficult to meet the urgent needs of the electronics manufacturing industry for cost reduction, efficiency improvement, and standardized operations. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the problems of high labor costs and insufficient reliability caused by relying on manual opening of the solder paste storage refrigerator door in advance, this invention proposes an automatic door opening device for a solder paste storage refrigerator that is simple in structure, easy to install, and can automatically open the door at a time. By using this device, the refrigerator door will be automatically opened in advance at a time, thereby realizing the reheating of solder paste and removing moisture from the refrigerator, reducing labor costs, and improving soldering quality and product reliability.

[0007] The objective of this invention can be achieved through the following technical solutions.

[0008] An automatic door opening device for a solder paste storage refrigerator includes: The timing control component is used to set the running time and generate and send a control signal to the mechanical push rod assembly when the set running time is reached; The mechanical push rod assembly is used to receive control signals sent by the timing control assembly and perform a linear push-out action. Its push-out end acts on the refrigerator door of the solder paste storage refrigerator to push the refrigerator door open. The device housing assembly is used to house and secure the timing control assembly and the mechanical push rod assembly, and to detachably mount the entire device onto the refrigerator body of the solder paste storage refrigerator.

[0009] Furthermore, the timing control component includes a power supply module, a digital encoder, and a DC motor controller. The power supply module supplies power to the digital encoder and the DC motor controller respectively. The digital encoder is used to set and display the automatic door opening time and sends an electrical signal to the DC motor controller when the time arrives. The DC motor controller is connected to the mechanical push rod assembly and is used to drive the mechanical push rod assembly to move according to the electrical signal.

[0010] Furthermore, the digital encoder integrates a display screen, a time setting button, and a reset button. The display screen is used to display the current time, the automatic door opening time set by the user, or other working status information. The time setting button is used for the user to adjust and set the automatic door opening time. The reset button is used to manually reset the timing state of the digital encoder or trigger its reset function. Pressing the reset button resets the mechanical push rod assembly, thereby allowing the refrigerator door to be closed manually.

[0011] Furthermore, an encoder power adapter is connected in series between the power module and the digital encoder, and the power module is electrically connected to the power socket.

[0012] Furthermore, the mechanical push rod assembly includes a DC motor, a motion conversion mechanism, and a push rod; the input end of the motion conversion mechanism is connected to the output shaft of the DC motor, and the output end is connected to the push rod, for converting the rotational motion of the DC motor into the linear reciprocating motion of the push rod; the end of the push rod is provided with a push plate for contacting and pushing open the refrigerator door.

[0013] Furthermore, the motion conversion mechanism is a linkage mechanism, including a first reversing link and a second reversing link that are hinged to each other. The first reversing link is fixedly connected to the output shaft of the DC motor, and the second reversing link is hinged to the push rod.

[0014] Furthermore, the DC motor is fixed on the support frame, which is also equipped with a counting sensor and a guide sleeve. The counting sensor is used to detect the number of rotations of the first commutator linkage, and after detecting a predetermined number of rotations, it sends a signal to the DC motor controller to stop the DC motor. The positioning sleeve is used to guide and constrain the push rod to ensure that it makes linear reciprocating motion within the positioning sleeve.

[0015] Furthermore, the device housing assembly includes a fixed base and a cover box; the fixed base is used to install the entire device on the refrigerator body, and the cover box is closed on the fixed base to form an accommodating space, in which the timing control component and the mechanical push rod component are fixedly installed.

[0016] Furthermore, the fixed base is provided with a magnetic attraction component, which fixes the entire device to the refrigerator body by magnetic attraction; at least one side of the fixed base is provided with a limiting edge, which is used to cooperate with the flange or groove on the refrigerator body to achieve auxiliary positioning and fixation.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows: (1) Achieve automation and significantly reduce labor costs: Through the cooperation of the timing control component and the mechanical push rod component, the device can automatically perform the door opening action at a preset time, completely replacing the traditional method of requiring operators to arrive 2-4 hours in advance to manually open the door, directly saving non-working hour labor costs, and avoiding production risks caused by human forgetfulness or delay.

[0018] (2) Simple and reliable structure, low manufacturing cost: The present invention adopts a timing control component consisting of a power supply module, a digital encoder, and a DC motor controller, as well as a mechanical execution component consisting of a DC motor, a linkage mechanism, and a push rod. These are all mature and standard industrial components, and the combination method is direct and effective, making the overall device simple in structure, stable in operation, and easy to manufacture and maintain.

[0019] (3) Easy installation, strong adaptability, and non-destructive installation: The outer shell of the device is fixed to the refrigerator body by strong magnet adsorption and limiting edge structure, without the need to drill holes or make permanent modifications to the refrigerator, realizing fast and non-destructive installation and disassembly. This design enables the device to be flexibly adapted to various models and sizes of solder paste storage refrigerators, with high versatility.

[0020] (4) Precise control and safe and convenient operation: The technical solution is equipped with a counting sensor to detect the push rod stroke, ensuring that the door opening action stops automatically after it is in place, preventing damage to the equipment due to excessive pushing. At the same time, an independent manual reset button is provided to control the push rod to retract, making it convenient to manually close the refrigerator door at any time, improving the safety and flexibility of operation.

[0021] In summary, the device of the present invention has the advantages of simple structure, convenient use, and non-destructive installation. It can be customized according to user requirements and is compatible with various solder paste storage refrigerators, which greatly saves labor costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the automatic door opening device for the solder paste storage refrigerator of the present invention.

[0023] Figure 2 This is a front view of the automatic door opening device for the solder paste storage refrigerator of the present invention.

[0024] Figure 3 This is a schematic diagram of the timing control component in this invention.

[0025] Figure 4 This is a schematic diagram of the mechanical push rod assembly in this invention.

[0026] Figure 5 This is a schematic diagram of the movement of the mechanical push rod assembly in this invention.

[0027] Figure 6 This is a side sectional view of the automatic door opening device for the solder paste storage refrigerator of the present invention.

[0028] Figure 7 This is a schematic diagram of the housing assembly of the device in this invention.

[0029] Figure 8 This is a cross-sectional view of the automatic door opening device for the solder paste storage refrigerator of the present invention after installation.

[0030] Figure 9 This is a schematic diagram of the automatic door opening device for the solder paste storage refrigerator of the present invention.

[0031] Figure 10 This is a flowchart illustrating the functional implementation of the automatic door opening device for the solder paste storage refrigerator of the present invention.

[0032] Reference numerals: 1-Refrigerator body, 2-Fixed base, 3-Cover box, 4-Digital encoder, 5-Reset button, 6-Push plate, 7-Power socket, 8-Power module, 9-DC motor controller, 10-Refrigerator door, 11-Encoder power adapter, 12-Second fixed bracket, 13-First fixed bracket, 14-DC motor, 15-Counting sensor, 16-First reversing link, 17-Second reversing link, 18-Push rod, 19-Guide sleeve, 20-Support frame, 21-Third fixed bracket, 22-Magnetic component, 23-Pin, 24-Fasting nut, 25-Output shaft, 26-Limiting edge. Detailed Implementation

[0033] The present invention will now be further described with reference to the accompanying drawings.

[0034] like Figures 1 to 10 As shown, this invention proposes an automatic door opening device for a solder paste storage refrigerator to achieve timed automatic door opening. It mainly consists of three parts: a timer control component, a mechanical push rod component, and a device housing component. The timer control component is used to set the running time and generate and send a control signal to the mechanical push rod component when the set running time is reached. The mechanical push rod component receives the control signal from the timer control component and performs a linear push-out action, with its push-out end acting on the refrigerator door 10 of the solder paste storage refrigerator to open the door 10. The device housing component is used to house and fix the timer control component and the mechanical push rod component, and to detachably install the entire device onto the refrigerator body 1 of the solder paste storage refrigerator.

[0035] The timing control component comprises a power supply module 8, a digital encoder 4, a DC motor controller 9, a power socket 7, and an encoder power adapter 11. The encoder power adapter 11 is connected in series between the power supply module 8 and the digital encoder 4. The power supply module 8 is electrically connected to both the power socket 7 and the DC motor controller 9. The power supply module 8 provides power to both the digital encoder 4 and the DC motor controller 9. The digital encoder 4 is used to set and display the automatic door opening time and sends an electrical signal to the DC motor controller 9 when the time is reached. The DC motor controller 9 is connected to the mechanical push rod assembly and is used to drive the mechanical push rod assembly to move according to the electrical signal.

[0036] The digital encoder 4 integrates a display screen, a time setting button, and a reset button 5. The display screen shows the current time, the user-set automatic door opening time, or other operating status information. The time setting button allows the user to adjust and set the automatic door opening time. The reset button 5 is used to manually reset the timing state of the digital encoder 4 or trigger its reset function. When it is necessary to manually close the refrigerator door 10, pressing the reset button 5 will reset the mechanical push rod assembly, thereby manually closing the refrigerator door 10.

[0037] The mechanical push rod assembly consists of a DC motor 14, a motion conversion mechanism, a push rod 18, a push plate 6, a counting sensor 15, a guide sleeve 19, and a support frame 20. The input end of the motion conversion mechanism is connected to the output shaft 25 of the DC motor 14, and the output end is connected to the push rod 18, converting the rotational motion of the DC motor 14 into the linear reciprocating motion (i.e., piston motion) of the push rod 18. The motion conversion mechanism is a linkage mechanism, including a first reversing link 16 and a second reversing link 17, which are hinged together by a pin 23. The first reversing link 16 is fixedly connected to the output shaft 25 of the DC motor 14, and the second reversing link 17 is hinged to the push rod 18 by the pin 23. The push plate 6 is fixed to the end of the push rod 18 by a fastening nut 24, and is used to contact and push open the refrigerator door 10. The DC motor 14, the counting sensor 15, and the guide sleeve 19 are respectively fixed to the support frame 20. The counting sensor 15 is used to detect the number of rotations of the first reversing link 16, and after detecting a predetermined number of rotations, it sends a signal to the DC motor controller 9 to stop the DC motor 14. The positioning sleeve 19 is used to guide and constrain the push rod 18 to ensure that it performs linear reciprocating motion within the positioning sleeve 19.

[0038] The device housing assembly consists of a fixed base 2 (customizable according to refrigerator dimensions), a cover box 3, a magnetic suction component 22, a first fixing frame 13, a second fixing frame 12, and a third fixing frame 21. The fixed base 2 is equipped with a magnetic suction component 22, such as multiple strong magnets (preferably 5) fixed to the fixed base 2 with screws, thus magnetically attracting the entire device to the refrigerator body 1. At least one side of the fixed base 2 has a limiting edge 26 for engaging with a flange or groove on the refrigerator body 1 to achieve auxiliary positioning and fixation. The fixed base 2 is used to install the entire device onto the refrigerator body 1. The cover box 3 covers the fixed base 2, forming an accommodating space, within which the timing control component and the mechanical push rod component are fixedly installed. After the cover box 3 is installed, the device housing assembly is attracted to the outer surface of the refrigerator body 1. At this point, the housing assembly and the refrigerator body 1 are firmly fixed by the strong magnets and the limiting edge 26 of the fixed base, preventing easy detachment and achieving quick, secure, and non-destructive installation. The digital encoder 4 is fixedly connected to the housing 3 via the first fixing bracket 13, and the encoder power adapter 11 and the support bracket 20 are fixedly connected to the fixed base 2 via the second fixing bracket 12 and the third fixing bracket 21, respectively. Furthermore, the push plate 6 is located outside the housing 3.

[0039] The working process of the automatic door opening device for the solder paste storage refrigerator of the present invention is as follows: The entire device is magnetically attached to a suitable position on the side of the refrigerator body 1 using the magnetic suction component 22 and the limiting edge 26, ensuring that the push plate 6 of the mechanical push rod assembly is facing the refrigerator door 10. In use, the automatic door opening time is set using the time setting button on the digital encoder 4 in conjunction with the display screen. After the set time is reached, the digital encoder 4 sends an electrical signal to the DC motor controller 9. Upon receiving the signal, the controller 9 drives the DC motor 14 to rotate forward. The output shaft 25 of the motor assembly 14 drives the first reversing linkage 16 to rotate, which in turn drives the push rod 18 to extend linearly along the guide sleeve 19 via the second reversing linkage 17. The push rod 18 drives the push plate 6, which ultimately pushes open the refrigerator door 10. After the counting sensor 15 detects that the first reversing linkage 16 has rotated half a revolution (corresponding to the push rod 18 being pushed out to the end), it sends a signal to the DC motor controller 9, which then stops driving the DC motor 14, and the push rod 18 stops at the extended position. When it is necessary to manually close the refrigerator door 10, press the reset button 5, the DC motor controller 9 drives the DC motor 14 to reverse, the push rod 18 retracts, and the refrigerator door can be closed.

[0040] Although the functions and working processes of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific functions and working processes described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these are within the protection scope of the present invention.

Claims

1. An automatic door opening device for a solder paste storage refrigerator, characterized in that, include: The timing control component is used to set the running time and generate and send a control signal to the mechanical push rod assembly when the set running time is reached; The mechanical push rod assembly is used to receive control signals sent by the timing control assembly and perform a linear push-out action. Its push-out end acts on the refrigerator door of the solder paste storage refrigerator to push the refrigerator door open. The device housing assembly is used to house and secure the timing control assembly and the mechanical push rod assembly, and to detachably mount the entire device onto the refrigerator body of the solder paste storage refrigerator.

2. The automatic door opening device for the solder paste storage refrigerator according to claim 1, characterized in that, The timing control component includes a power supply module (8), a digital encoder (4), and a DC motor controller (9). The power supply module (8) supplies power to the digital encoder (4) and the DC motor controller (9), respectively. The digital encoder (4) is used to set and display the automatic door opening time and send an electrical signal to the DC motor controller (9) when the time arrives. The DC motor controller (9) is connected to the mechanical push rod assembly and is used to drive the mechanical push rod assembly to move according to the electrical signal.

3. The automatic door opening device for the solder paste storage refrigerator according to claim 2, characterized in that, The digital encoder (4) integrates a display screen, a time setting button, and a reset button (5). The display screen is used to display the current time, the automatic door opening time set by the user, or other working status information. The time setting button is used for the user to adjust and set the automatic door opening time. The reset button (5) is used to manually reset the timing state of the digital encoder (4) or trigger its reset function. Pressing the reset button (5) resets the mechanical push rod assembly, thereby allowing the refrigerator door to be closed manually.

4. The automatic door opening device for the solder paste storage refrigerator according to claim 2, characterized in that, An encoder power adapter (11) is connected in series between the power module (8) and the digital encoder (4), and the power module (8) is electrically connected to the power socket (7).

5. The automatic door opening device for the solder paste storage refrigerator according to claim 1, characterized in that, The mechanical push rod assembly includes a DC motor (14), a motion conversion mechanism, and a push rod (18); the input end of the motion conversion mechanism is connected to the output shaft (25) of the DC motor (14), and the output end is connected to the push rod (18), which is used to convert the rotational motion of the DC motor (14) into the linear reciprocating motion of the push rod (18); the end of the push rod (18) is provided with a push plate (6) for contacting and pushing open the refrigerator door (10).

6. The automatic door opening device for the solder paste storage refrigerator according to claim 5, characterized in that, The motion conversion mechanism is a linkage mechanism, including a first reversing link (16) and a second reversing link (17) that are hinged to each other. The first reversing link (16) is fixedly connected to the output shaft (25) of the DC motor (14), and the second reversing link (17) is hinged to the push rod (18).

7. The automatic door opening device for the solder paste storage refrigerator according to claim 5, characterized in that, The DC motor (14) is fixed on the support frame (20). The support frame (20) is also equipped with a counting sensor (15) and a guide sleeve (19). The counting sensor (15) is used to detect the number of rotations of the first reversing link (16). After detecting a predetermined number of rotations, it sends a signal to the DC motor controller (9) to stop the DC motor (14). The positioning sleeve (19) is used to guide and constrain the push rod (18) to ensure that it makes linear reciprocating motion within the positioning sleeve (19).

8. The automatic door opening device for the solder paste storage refrigerator according to claim 1, characterized in that, The device housing assembly includes a fixed base (2) and a cover (3); the fixed base (2) is used to install the entire device on the refrigerator body (1), and the cover (3) covers the fixed base (2) to form an accommodating space, and the timing control component and the mechanical push rod component are fixedly installed in the accommodating space.

9. The automatic door opening device for a solder paste storage refrigerator according to claim 8, characterized in that, The fixed base (2) is provided with a magnetic suction component (22), which fixes the entire device to the refrigerator body (1) by magnetic attraction; at least one side of the fixed base (2) is provided with a limiting edge (26), which is used to cooperate with the flange or groove on the refrigerator body (1) to achieve auxiliary positioning and fixation.

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