Heated blanket integrated multipurpose junction box

Abstract

This utility model discloses an integrated multi-purpose junction box for heating blankets, belonging to the technical field of heating blanket components. It includes a low-voltage module, a high-voltage module, a silicone sealing plate, and an electromagnet. The low-voltage module includes a low-voltage compartment, inside which a low-voltage control board is encapsulated. A heating blanket interface is fitted and fixed at the end of the low-voltage compartment; the heating blanket interface is connected to the low-voltage control board; a waterproof button connected to the low-voltage control board is fitted on the end face of the low-voltage compartment. The high-voltage module includes a high-voltage compartment, inside which a power module and multiple relay units are encapsulated. The input end of the power module is connected to the mains power line; the output end of the power module is connected to the relay units. This integrated multi-purpose junction box for heating blankets can achieve separate sealed compartments for high and low voltage circuits, and provides both mains power supply and temporary external power supply. Furthermore, it provides a mains power interface, magnetic attachment for the junction box, and heating blanket temperature control.

Description

Technical Field

[0001] This utility model specifically relates to an integrated multi-purpose junction box for heating blankets, belonging to the technical field of heating blanket components. Background Technology

[0002] An electric blanket is a contact-type electric heating appliance. The soft, coiled heating element, with standard insulation, is woven or sewn into the blanket in a serpentine pattern. It generates heat when electricity is applied, used to raise the temperature inside the blanket while sleeping for warmth, and also for dehumidifying bedding. An electric blanket requires a junction box, which connects the heating wire to the power source. Existing junction boxes generally have poor waterproofing. Therefore, Chinese Patent Publication No. CN215421055U discloses a leakage-proof junction box for electric blankets. This structure uses internal folds to abut the wire, forming a multi-lipped, tightly sealed... The sealed structure effectively prevents moisture from entering the box from the outside, and the bending posts hinder the axial movement of the wires, protecting the welded structure between the wires and the circuit board inside the box. Another example is a waterproof electric blanket junction box disclosed in Chinese Patent Publication No. CN215421058U. This structure uses a frame and two half-frames to form a double waterproof structure, effectively preventing external moisture from entering. The design of the inner and outer edge baffles, arranged vertically in an alternating pattern, creates a labyrinthine waterproof structure between the frame and the two half-frames, resulting in excellent overall waterproofing. Both of these structures provide waterproofing, but the junction box has a single function. Utility Model Content

[0003] To address the aforementioned issues, this utility model proposes an integrated multi-purpose junction box for heating blankets. This box can separate and seal strong and weak current circuits, and is equipped with both mains power supply and temporary external power supply. In addition, it also provides a mains power interface, magnetic attachment for the junction box, and temperature control for the heating blanket.

[0004] This utility model discloses an integrated multi-purpose junction box for heating blankets, comprising:

[0005] A low-voltage module includes a low-voltage compartment, an inner side of which is encapsulated a low-voltage control board, and a heating blanket interface is fitted and fixed at the end of the low-voltage compartment; the heating blanket interface is connected to the low-voltage control board; and a waterproof button connected to the low-voltage control board is fitted on the end face of the low-voltage compartment.

[0006] A high-voltage module includes a high-voltage compartment, inside which a power module and multiple relay units are encapsulated. The input terminal of the power module is connected to the mains power line; the output terminal of the power module is connected to the relay units; the end of the high-voltage compartment is fitted with and fixed with a mains power interface and a temporary power interface; the mains power interface and the temporary power interface are respectively connected to the output terminals of two relay units; the output terminals of the relay units are connected to the low-voltage control board via connectors.

[0007] A silicone sealing plate is pressed between the low-voltage compartment and the high-voltage compartment and covers the outside of the connector; a groove is opened in the middle of the silicone sealing plate; the low-voltage compartment and the high-voltage compartment are fastened together by bolts;

[0008] An electromagnet is fitted into a slot and fixed to the low-voltage module; the terminals of the electromagnet are connected to the low-voltage control board.

[0009] This utility model's integrated multi-purpose junction box for heating blankets encapsulates both low-voltage and high-voltage modules separately, and uses a connector to achieve a sealed conductive connection between the low-voltage and high-voltage modules. During installation, a silicone sealing plate is pressed between the low-voltage and high-voltage modules to achieve an elastic seal on the sides of the modules that are close to each other. The connector is then covered and sealed with the silicone sealing plate. Specifically, the low-voltage control board is encapsulated in the low-voltage compartment, and a waterproof button is connected to the low-voltage control board to achieve overall waterproofing. Simultaneously, the power module and relay unit are encapsulated in the high-voltage compartment, with the power module and relay unit encapsulated separately. Finally, the connector connects the low-voltage control board and the relay unit. The system connects to the power supply module via external AC power. After processing (transformation, rectification, filtering, and regulation), the power supply module sends power to the relay unit, which then supplies power to the low-voltage control board. The low-voltage control board issues control commands, such as an electromagnet activation command, which activates the corresponding relay unit, supplying power to the electromagnet via the relay unit; a heating blanket activation command, which activates the corresponding relay unit, supplying power to the heating blanket via the relay unit; and an AC power interface and temporary power interface activation command, which activate the corresponding relay unit, supplying power to the AC power interface via the relay unit; and a temporary power interface, which supplies power to the heating blanket via the relay unit.

[0010] Furthermore, proximity switches are provided on the sides of the mains power interface and the temporary power interface; the proximity switches are connected to the low-voltage control board via a connector; when the mains power equipment or external power supply is connected to the mains power interface or the temporary power interface, the proximity switches are triggered and a trigger signal is sent to the low-voltage control board. At this time, the trigger button corresponding to the waterproof button is effective; the low-voltage control board triggers a signal to the corresponding relay unit, otherwise pressing the waterproof button is ineffective.

[0011] Further, the inner sides of the weak-current compartment and the strong-current compartment are integrally formed with a first window in a square shape and a second window in a rectangular shape with a horizontal bar in the middle; the weak-current control board is embedded in the first window; the power supply module and multiple groups of relay units are respectively fixed to the second window; a first sealing plate and a second sealing plate are respectively fixed to the outside of the first window and the second window by bolts, and a sealing glue is provided between the edge of the first sealing plate and the strong-current compartment; a sealing glue is provided between the second sealing plate and the strong-current compartment; the docking plugs are respectively arranged on the first sealing plate and the second sealing plate; the first window on the inner side of the weak-current compartment is used for installing the weak-current control board, and the second window of the strong-current compartment is used for installing the power supply module and multiple groups of relay units; and they are encapsulated by the first sealing plate and the second sealing plate. During encapsulation, first, position and fasten with bolts, and then, apply a circle of sealing glue; when the weak-current module and the strong-current module are fastened together, the docking plugs can achieve automatic fitting and docking.

[0012] Further, the docking plug includes a first insulating column and a second insulating column integrally formed with the first sealing plate and the second sealing plate; the first insulating column and the second insulating column are fitted with each other; a conductive core is cast inside the first insulating column, and an elastic conductive column electrically connected to the conductive core is cast inside the second insulating column; the conductive core is connected to the weak-current control board, and the elastic conductive column is electrically connected to the relay unit; after the strong-current compartment and the weak-current compartment are installed together, the first insulating column and the second insulating column are fitted with each other, so that the conductive core and the elastic conductive column are electrically connected, and the weak-current control board and the relay unit are electrically connected.

[0013] Further, the elastic conductive column includes a socket cast inside the second insulating column, and a hole groove for inserting the conductive core is provided at the front end of the socket; an insulating sliding sleeve is slidably arranged inside the socket; a spring body is sleeved outside the insulating sliding sleeve; a power connection seat in contact with the conductive core is fixedly fitted inside the insulating sliding sleeve; the power connection seat extends outside the second insulating column through a wire; after the first insulating column and the second insulating column are fitted, the conductive core is inserted into the hole groove, and the front end of the conductive core abuts against the power connection seat, so that the insulating sliding sleeve slides along the socket, compressing the spring body, and using the spring force of the spring body, the power connection seat is always in close electrical contact with the conductive core; thus, the weak-current module and the strong-current module are connected together through the conductive core and the power connection seat.

[0014] Further, hole columns are integrally formed at the four ends of the inner sides of the weak-current compartment and the strong-current compartment; the weak-current compartment and the strong-current compartment face each other, and fastening bolts and nuts are arranged inside the hole columns and fastened together; the hole columns can strengthen the structural strength of the weak-current compartment and the strong-current compartment, and by arranging the fastening bolts and nuts inside the hole columns, the weak-current compartment and the strong-current compartment can be fastened together, so that the weak-current compartment can be independently encapsulated, the strong-current compartment can be independently encapsulated, and the weak-current compartment and the strong-current compartment can be integrally encapsulated.

[0015] Furthermore, a functional display screen is embedded in the end face of the low-voltage compartment, which can display the current status of various functions and temperature values.

[0016] Furthermore, the waterproof button includes a mains power trigger button, a temporary power trigger button, a magnetic start / stop button, a heating blanket start / stop button, and a temperature adjustment button. When the mains-powered device is connected to the mains power interface and the mains power trigger button is pressed, the mains power interface is connected to power, and power can be supplied to the mains-powered device. When mains power is unavailable outdoors, a car cigarette lighter can be used as a temporary power source, and the temporary power source can be connected to the temporary power interface. Then, pressing the temporary power trigger button will supply power to the electric blanket through the temporary power source. When neither the mains power interface nor the temporary power interface is connected to mains power... When electrical equipment and temporary power are in use, the proximity switch cannot detect them. At this time, pressing the mains trigger button and the temporary power trigger button alone will be ineffective, and the low-voltage control board will not send control commands to the relay unit. When the magnetic start / stop button is pressed, the electromagnet will be energized and generate magnetic attraction. Pressing it again will deactivate the electromagnet's magnetic attraction. When the heating blanket start / stop button is pressed, the temperature adjustment button will be executed to set the temperature value. The temperature of the heating blanket can be adjusted through the temperature adjustment button (the low-voltage control board controls the energizing cycle of the relay unit, or controls the output power of the power output module).

[0017] Compared with the prior art, the integrated multi-purpose junction box for heating blankets of this utility model separates the high-voltage and low-voltage electrical components, and encapsulates and seals the high-voltage and low-voltage modules separately. After the high-voltage and low-voltage compartments are secured together, the low-voltage and high-voltage modules automatically fit together and seal. The low-voltage module has functions for opening and closing the output interface, opening and closing the heating blanket, adjusting the temperature of the heating blanket, and magnetic attraction. The high-voltage module has functions for providing a mains power interface and connecting to an external power source, making the junction box multi-functional. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the integrated multi-purpose junction box for heating blankets before assembly.

[0019] Figure 2 This is a schematic diagram of the overall structure of the integrated multi-purpose junction box for heating blankets of this utility model.

[0020] Figure 3 This is a schematic diagram of the overall front structure of the integrated multi-purpose junction box for heating blankets of this utility model.

[0021] Figure 4 This is a schematic diagram of the overall structure of the low-voltage compartment of this utility model.

[0022] Figure 5 This is a schematic diagram of the front structure of the first sealing plate of this utility model.

[0023] Figure 6 This is a schematic diagram of the back structure of the first sealing plate of this utility model.

[0024] Figure 7 This is a schematic diagram of the internal structure of the high-voltage compartment of this utility model.

[0025] Figure 8 This is a schematic diagram of the front structure of the second sealing plate of this utility model.

[0026] Figure 9 This is a schematic diagram of the overall structure of the mains power interface of this utility model.

[0027] Figure 10 This is a schematic diagram of the elastic conductive column structure of this utility model.

[0028] Figure 11 This is a schematic diagram of the electrical connection structure of each module of this utility model.

[0029] Reference numerals: 1. Low-voltage compartment, 2. Low-voltage control board, 3. Heating blanket interface, 4. Waterproof button, 5. High-voltage compartment, 6. Power module, 7. Relay unit, 8. Mains power cord, 9. Mains interface, 10. Temporary power interface, 11. Silicone sealing plate, 12. Electromagnet, 13. Proximity switch, 14. First window, 15. Second window, 16. First sealing plate, 17. Second sealing plate, 18. First insulating post, 19. Second insulating post, 20. Conductive core, 21. Tube seat, 22. Insulating sleeve, 23. Spring body, 24. Electrical connector, 25. Hole post, 26. Function display screen. Detailed Implementation

[0030] Example 1:

[0031] like Figures 1 to 11 The integrated multi-purpose junction box for heating blankets shown includes:

[0032] The low-voltage module includes a low-voltage compartment 1, a low-voltage control board 2 encapsulated inside the low-voltage compartment 1, and a heating blanket interface 3 fitted and fixed at the end of the low-voltage compartment 1; the heating blanket interface 3 is connected to the low-voltage control board 2; and a waterproof button 4 connected to the low-voltage control board 2 is fitted on the end face of the low-voltage compartment 1.

[0033] The high-voltage module includes a high-voltage compartment 5, inside which a power module 6 and multiple relay units 7 are encapsulated. The input terminal of the power module 6 is connected to the mains power line 8. The output terminal of the power module 6 is connected to the relay units 7. The end of the high-voltage compartment 5 is fitted with a mains power interface 9 and a temporary power interface 10. The mains power interface 9 and the temporary power interface 10 are respectively connected to the output terminals of two relay units 7. The output terminals of the relay units 7 are connected to the low-voltage control board 2 via connectors.

[0034] A silicone sealing plate 11 is pressed between the low-voltage compartment 1 and the high-voltage compartment 5 and covers the outside of the connector; a groove is provided in the middle of the silicone sealing plate 11; the low-voltage compartment 1 and the high-voltage compartment 5 are fastened together by bolts.

[0035] Electromagnet 12, which fits into the slot and is fixed to the low-voltage module; the wiring terminal of the electromagnet 12 is connected to the low-voltage control board 2.

[0036] This utility model's integrated multi-purpose junction box for heating blankets encapsulates both low-voltage and high-voltage modules separately, and uses a connector to achieve a sealed conductive connection between the low-voltage and high-voltage modules. During installation, a silicone sealing plate 11 is pressed between the low-voltage and high-voltage modules to achieve an elastic seal on the sides of the modules that are close to each other. The connector is also sealed by the silicone sealing plate 11. Specifically, the low-voltage control board 2 is encapsulated in the low-voltage compartment 1, and the waterproof button 4 is connected to the low-voltage control board 2 to achieve overall waterproofing. At the same time, the power module 6 and the relay unit 7 are encapsulated in the high-voltage compartment 5, with the power module 6 and the relay unit 7 encapsulated separately. Finally, the low-voltage control board 2 and the relay unit 7 are connected through a connector. The mains power supply provides power to the power module 6. After processing (transformation, rectification, filtering, and voltage regulation), the power module 6 sends power to the relay unit 7, which in turn supplies power to the low-voltage control board 2. The low-voltage control board 2 issues control commands, such as an instruction to turn on the electromagnet 12, which activates the corresponding relay unit 7, and the power module 6 supplies power to the electromagnet 12 through the relay unit 7; or an instruction to turn on the heating blanket, which activates the corresponding relay unit 7, and the power module 6 supplies power to the heating blanket through the relay unit 7; or an instruction to turn on both the mains power interface 9 and the temporary power interface 10, which activates the corresponding relay unit 7, and the power module 6 supplies power to the mains power interface 9 through the relay unit 7; and the temporary power interface 10 supplies power to the heating blanket through the relay unit 7.

[0037] The mains power interface 9 and the temporary power interface 10 are equipped with proximity switches 13 on their sides. The proximity switches 13 are connected to the low-voltage control board 2 via a connector. When the mains power equipment or external power is connected to the mains power interface 9 or the temporary power interface 10, the proximity switches 13 are triggered and send a trigger signal to the low-voltage control board 2. At this time, the trigger button corresponding to the waterproof button 4 is effective. The low-voltage control board 2 triggers a signal to the corresponding relay unit 7. Otherwise, pressing the waterproof button 4 is ineffective.

[0038] The inner sides of the low-voltage compartment 1 and the high-voltage compartment 5 are respectively integrally formed with a U-shaped first window 14 and a Sun-shaped second window 15; the low-voltage control board 2 is embedded in the first window 14; the power module 6 and multiple relay units 7 are respectively fixed to the second window 15; the first sealing plate 16 and the second sealing plate 17 are respectively fixed to the outside of the first window 14 and the second window 15 by bolts, and a sealant is provided between the edge of the first sealing plate 16 and the high-voltage compartment 5; a sealant is provided between the second sealing plate 17 and the high-voltage compartment 5; the docking plug is respectively set on the first sealing plate 16 and the second sealing plate 17; the first window 14 on the inner side of the low-voltage compartment 1 is used to install the low-voltage control board 2, and the second window 15 of the high-voltage compartment 5 is used to install the power module 6 and multiple relay units 7; and they are encapsulated by the first sealing plate 16 and the second sealing plate 17. During encapsulation, the bolts are first used for positioning and tightening, and then a ring of sealant is applied; when the low-voltage module and the high-voltage module are fastened together, the docking plug can automatically fit and dock.

[0039] The docking plug includes a first insulating post 18 and a second insulating post 19 integrally formed with the first sealing plate 16 and the second sealing plate 17; the first insulating post 18 and the second insulating post 19 are interlocked; a conductive core 20 is cast inside the first insulating post 18, and an elastic conductive post electrically connected to the conductive core 20 is cast inside the second insulating post 19; the conductive core 20 is connected to the weak current control board 2, and the elastic conductive post is electrically connected to the relay unit 7; when the strong current compartment 5 and the weak current compartment 1 are installed as one unit, the first insulating post 18 and the second insulating post 19 are interlocked, thereby electrically connecting the conductive core 20 and the elastic conductive post, and electrically connecting the weak current control board 2 to the relay unit 7.

[0040] The elastic conductive post includes a tube seat 21 cast inside the second insulating post 19. The front end of the tube seat 21 is provided with a slot for insertion into the conductive core 20. An insulating sleeve 22 is slidably disposed inside the tube seat 21. A spring body 23 is sleeved on the outside of the insulating sleeve 22. A contact seat 24 that abuts against the conductive core 20 is fitted and fixed inside the insulating sleeve 22. The contact seat 24 extends out of the second insulating post 19 through a wire. When the first insulating post 18 and the second insulating post 19 are fitted together, the conductive core 20 is embedded in the slot, and the front end of the conductive core 20 abuts against the contact seat 24, thereby causing the insulating sleeve 22 to slide along the tube seat 21, compressing the spring body 23. The spring force of the spring body 23 ensures that the contact seat 24 and the conductive core 20 are always in close electrical contact. Thus, the low-voltage module and the high-voltage module are connected as one unit through the conductive core 20 and the contact seat 24.

[0041] The weak current compartment 1 and the strong current compartment 5 are integrally formed with perforated posts 25 at their four ends on the inner side; the weak current compartment 1 and the strong current compartment 5 are facing each other, and the perforated posts 25 are provided with fastening bolts and nuts to fasten them together; the perforated posts 25 can strengthen the structural strength of the weak current compartment 1 and the strong current compartment 5, and the fastening bolts and nuts provided on the inner side of the perforated posts 25 can fasten the weak current compartment 1 and the strong current compartment 5 together, thereby enabling the weak current compartment 1 to be independently encapsulated, the strong current compartment 5 to be independently encapsulated, and the weak current compartment 1 and the strong current compartment 5 to be independently encapsulated together.

[0042] The end face of the low-voltage compartment 1 is fitted with a functional display screen 26, which can display the current status of various functions and temperature values.

[0043] The waterproof button 4 includes a mains power trigger button, a temporary power trigger button, a magnetic start / stop button, a heating blanket start / stop button, and a temperature adjustment button. When the mains-powered device is connected to the mains power interface 9 and the mains power trigger button is pressed, the mains power interface 9 is powered, and power can be supplied to the mains-powered device. When mains power is unavailable outdoors, a car cigarette lighter can be used as a temporary power source, and the temporary power source can be connected to the temporary power interface 10. Then, pressing the temporary power trigger button will supply power to the electric blanket through the temporary power source. When no mains-powered device is connected to the mains power interface 9 or the temporary power interface 10... When the power supply is on or temporarily, the proximity switch 13 cannot be detected. At this time, pressing the mains trigger button and the temporary power trigger button separately will be ineffective, and the low-voltage control board 2 will not send control commands to the relay unit 7. When the magnetic start / stop button is pressed, the electromagnet 12 will be energized and generate magnetic attraction. Pressing it again will deactivate the magnetic attraction of the electromagnet 12. When the heating blanket start / stop button is pressed, the temperature adjustment button will be executed to set the temperature value. The temperature of the heating blanket can be adjusted by the temperature adjustment button (the low-voltage control board 2 controls the energizing cycle of the relay unit 7, or the low-voltage control board 2 controls the output power of the power output module).

[0044] The above embodiments are merely preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model are included within the scope of the present utility model.

Claims

1. A multi-purpose junction box for heating blankets, characterized in that: Comprising: A weak current module, the weak current module includes a weak current bin, a weak current control board is encapsulated inside the weak current bin, and a heating blanket interface is fitted and fixed at the end of the weak current bin; the heating blanket interface is connected to the weak current control board; a waterproof button connected to the weak current control board is fitted on the end face of the weak current bin; A strong current module, the strong current module includes a strong current bin, a power supply module and multiple groups of relay units are encapsulated inside the strong current bin; the input end of the power supply module is connected to the mains power cord; the output end of the power supply module is connected to the relay units; a mains power interface and a temporary power interface are fitted and fixed at the end of the strong current bin; the mains power interface and the temporary power interface are respectively connected to the output ends of two paths of relay units; the output end of the relay unit is connected to the weak current control board through a docking plug; A silicone sealing plate, the silicone sealing plate is pressed between the weak current bin and the strong current bin and covers the outside of the docking plug; a notch is formed in the middle of the silicone sealing plate; the weak current bin and the strong current bin are fastened together by bolts; An electromagnet, the electromagnet is fitted into the notch and fixed to the weak current module; the wiring end of the electromagnet is connected to the weak current control board.

2. The integrated multi-purpose junction box for heating blankets according to claim 1, characterized in that: Proximity switches are arranged on the sides of the mains power interface and the temporary power interface; the proximity switches are connected to the weak current control board through docking plugs.

3. The integrated multi-purpose junction box for heating blankets according to claim 1, characterized in that: First windows in a square shape and second windows in a shape like a Chinese character 'ri' are integrally formed inside the weak current bin and the strong current bin respectively; the weak current control board is embedded into the first windows; the power supply module and multiple groups of relay units are respectively fixed to the second windows; first sealing plates and second sealing plates are respectively fixed outside the first windows and the second windows by bolts, a sealing rubber is arranged between the edge of the first sealing plate and the strong current bin; a sealing rubber is arranged between the second sealing plate and the strong current bin; the docking plugs are respectively arranged on the first sealing plate and the second sealing plate.

4. The integrated multi-purpose junction box for heating blankets according to claim 3, characterized in that: The docking plug includes a first insulating column and a second insulating column integrally formed with the first sealing plate and the second sealing plate; the first insulating column and the second insulating column are mutually fitted; a conductive core is cast inside the first insulating column, and an elastic conductive column electrically connected to the conductive core is cast inside the second insulating column; the conductive core is connected to the weak current control board, and the elastic conductive column is electrically connected to the relay unit.

5. The integrated multi-purpose junction box for heating blankets according to claim 4, characterized in that: The elastic conductive column includes a socket cast inside the second insulating column, a hole groove inserted into the conductive core is arranged at the front end of the socket; an insulating sliding sleeve is slidably arranged inside the socket; a spring body is sleeved outside the insulating sliding sleeve; a power connection seat abutted against the conductive core is fitted and fixed inside the insulating sliding sleeve; the power connection seat extends outside the second insulating column through a wire.

6. The integrated multi-purpose junction box for heating blankets according to claim 3, characterized in that: Hole columns are integrally formed at the four ends inside the weak current bin and the strong current bin; the weak current bin and the strong current bin are opposite to each other, and fastening bolts and nuts are arranged inside the hole columns and fastened together.

7. The integrated multi-purpose junction box for heating blankets according to claim 1, characterized in that: A function display screen is fitted on the end face of the weak current bin.

8. The integrated multi-purpose junction box for heating blankets according to claim 1, characterized in that: The waterproof button includes a mains power trigger button, a temporary power trigger button, a magnetic attraction start / stop button, a heating blanket start / stop button and a temperature adjustment button.

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