Temperature control coupler lower seat

Abstract

The application provides a temperature control coupler lower seat which is installed in a mounting hole of an electric heating base, and is characterized by comprising an insulating lower seat shell and a plurality of wiring spring sheets installed in electrode mounting grooves of the insulating lower seat shell. A center positioning column and a plurality of isolation ring ribs arranged in concentric circles are arranged on the front surface of the insulating lower seat shell, annular grooves are formed between the center positioning column and adjacent isolation ring ribs and between adjacent two-stage isolation ring ribs, one end of the annular groove is closed, the other end is provided with a hydrophobic hole for the coupling end of the wiring spring sheet to extend into, a guide recess is formed along the ring at the connection position of the annular groove and the electrode mounting groove, and the lower bottom surface of the guide recess is suspended above the extending section of the wiring spring sheet. The empty section layer structure formed between the guide recess and the wiring spring sheet can effectively prevent the safety problem caused by the small creepage distance between the high point of the conductive spring sheet and the connection section of the electrode mounting groove.

Description

Technical Field

[0001] This invention relates to a coupler for connecting upper and lower appliances to power supply, and more particularly to a temperature control coupler for household appliances such as kettles. Background Technology

[0002] In people's daily lives, small household appliances such as electric kettles, car cups, health pots, and frying pans are becoming increasingly common. As a result, people are paying more and more attention to the safety of these appliances. To enhance the aesthetics and convenience of consumers, manufacturers often design these appliances with separate upper and lower connectors. Therefore, during normal use or cleaning, if water is accidentally spilled onto the lower coupler, which is directly connected to the mains power, the kettle may overflow. When the overflowing water flows into the connector, it can easily ignite the contacts, causing injury. There are many types of couplers on the market, most of which only serve a connecting function. However, the safety of the coupler after water intrusion cannot be guaranteed during use and maintenance. Especially at the coupling connection, safety issues caused by insufficient creepage distance are more likely to occur. Summary of the Invention

[0003] This invention provides a temperature-controlled coupler base that is simple in structure, easy to install, has stable and reliable contacts, a long service life, and can ensure that there is no risk of electric shock even if water is poured into the connector, and can pass the overflow test.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a temperature control coupler base, which is installed in the mounting hole of an electric heating base, characterized in that: it includes an insulating base shell and a plurality of wire springs installed in the electrode mounting groove of the insulating base shell. The front of the insulating base shell is respectively provided with a central positioning post and a plurality of isolation ring ribs arranged in concentric circles. The central positioning post and the adjacent isolation ring ribs, and the two adjacent isolation ring ribs form a coaxially alternating annular groove. One end of the annular groove is closed, and the other end has a hydrophobic notch for the coupling end of the wire spring to extend into. The connection position of the annular groove with the electrode mounting groove extends along the ring to form a guide recess. The bottom surface of the guide recess is suspended above the extension section of the wire spring, that is, a gap is formed between the guide recess and the extension section of the wire spring.

[0005] As an improvement, the vertical distance between the bottom surface of the guide recess and the highest point of the wiring spring, i.e., the height of the void, is greater than 1.5mm.

[0006] As an improvement: the two sides of the annular groove at the first hydrophobic hole position are extended downwards as eaves, and the eaves and the coupling end of the connecting spring are suspended.

[0007] As an improvement: a water-guiding groove is provided between the hydrophobic hole and the closed section on the annular groove, away from the wiring spring, and a drainage hole is opened on the bottom surface of the water-guiding groove.

[0008] As an improvement, the bottom of the insulating lower housing is also provided with an outer partition edge extending outward from the electrode mounting groove and covering the upper part of the wiring spring. When the whole machine is installed, the outer partition edge covers and isolates the wiring spring under the whole machine panel so that it is not exposed.

[0009] As an improvement: the bottom of the insulating lower housing is provided with a peripheral ring platform that is connected to the outermost isolation ring rib. The outer partition is located below the peripheral ring platform. The upper surface of the peripheral ring platform is in a descending step shape. That is, the peripheral ring platform includes a primary ring platform that is adapted to fit the mounting hole of the base, and a secondary ring platform that is connected to the outer peripheral edge of the primary ring platform and abuts against the lower edge of the mounting hole of the base. The secondary ring platform has a mounting positioning groove that fits and limits the movement of the electric heater base plate.

[0010] The beneficial effects of this invention are as follows: The guide recess diverts the originally downward-flowing water laterally, allowing it to drain away from the connecting spring. Simultaneously, the empty section structure formed between the guide recess and the connecting spring effectively eliminates safety issues caused by the small creepage distance between the high point of the conductive spring and the connection surface of the electrode mounting groove. The guide recess can also connect to the closed section at the other end, forming a complete partition at the electrode mounting groove, and is particularly suitable for irregularly shaped connecting springs. It also facilitates the processing of the insulating lower housing. This invention offers better water conductivity, safer use, higher reliability, and meets various standard requirements. It also improves the success rate of overflow tests.

[0011] The following is a detailed description of a sealing machine provided by the present invention, with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the lower seat of the temperature control coupler provided by the present invention.

[0013] Figure 2 This is a schematic diagram of the bottom structure of the temperature control coupler base.

[0014] Figure 3 yes Figure 1 A schematic diagram of the structure of the lower insulating base housing.

[0015] Figure 4 This is a schematic diagram of the back structure of the insulating lower housing. Detailed Implementation

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, this invention discloses a temperature control coupler base, which is installed in the mounting hole of an electric heating base. Its features include an insulating lower base shell 1 and several connecting springs 3 installed within electrode mounting grooves 2 on the insulating lower base shell. The insulating lower base shell 1 has a central positioning post 11 and several concentrically arranged isolation ring ribs 12 on its front side. A coaxially spaced annular groove 5 is formed between the central positioning post 11 and adjacent isolation ring ribs, and between adjacent isolation ring ribs. The annular groove 5 has a closed section along its circumference, a water-guiding groove 9 with drainage holes 8 on its bottom surface, a drainage notch 6, and a guide platform 4. The coupling end of the connecting spring 3 extends into the drainage notch 6. The guide platform 4 extends along the circumference from the connection position of the connecting spring 3 to the electrode mounting groove 2. The lower surface of the guide platform 4 is suspended above the section where the connecting spring 3 extends, forming a gap between the guide platform 4 and the section where the connecting spring 3 extends. In this embodiment, the vertical distance between the lower surface of the guide platform 4 and the highest point of the connecting spring, i.e., the height of the gap, is greater than 1.5 mm. This height distance ensures a safe distance between the wiring spring 3 and the hydrophobic notch 6.

[0017] This embodiment aims to prevent water flow, especially high-pressure water flow, from directly flowing down the inner wall of the drainage hole, which could cause contact failure due to the small creepage distance between the inner wall of the drainage hole and the coupling end of the connecting spring, resulting in a low pass rate for overflow tests. At the location of the drainage hole 6, the two sides of the annular groove 5 form downward-extending eaves 7, with the coupling end of the eaves 7 suspended above the connecting spring 3. The eaves 7 not only prevent water from entering but also guide the water flow, allowing it to converge and drip from the lower end face. The narrow lower end face prevents water droplets from forming sufficient adhesion and accumulating on it. This suspended design provides sufficient safety space between the lower surface of the eaves 7 and the connecting spring, effectively solving the safety hazard caused by creepage distance.

[0018] In this embodiment, a water-guiding groove 9, communicating with the closed section, is provided between the annular groove 5 and the drainage hole 6, at a position away from the connecting spring 3. A drainage hole 8 is formed on the bottom surface of the water-guiding groove 9. Because the water-guiding groove communicates with the closed section, water that originally entered the closed section can be guided from the water-guiding groove and discharged through the drainage hole. This not only ensures that the water-guiding groove is far from the connecting spring in terms of position, but also, the recessed design of the sidewalls of the water-guiding groove completely isolates the coupling end of the connecting spring extending into the annular groove from the drainage outlet, effectively blocking water flow from the live components. Furthermore, the connecting springs are spaced apart, providing independent installation space.

[0019] Meanwhile, to address the issue of electric shock caused by exposed conductive spring contacts, especially when the conductive spring contacts are too close to the mounting hole of the electric heating base when assembled into the coupler's lower seat, this embodiment also provides an outer partition 10 extending outward from the electrode mounting groove 2 and covering the upper part of the conductive spring contact 3. During assembly, the outer partition 10 completely covers and isolates the conductive spring contact 3 from the bottom of the main panel. The bottom of the insulating lower seat housing 1 is provided with a peripheral ring platform 13 that is connected to the outermost isolation ring rib. The outer partition 10 is located below the peripheral ring platform 13. The upper surface of the peripheral ring platform 13 is stepped, meaning that the peripheral ring platform 13 includes a primary ring platform 131 that fits into the mounting hole of the base, and a secondary ring platform 132 that connects to the outer periphery of the primary ring platform 131 and abuts against the lower edge of the mounting hole of the base. The secondary ring 132 has a mounting and positioning groove 15 that mates with the base plate 3 of the electric heater. The outer spacer 10 completely isolates the conductive wire spring 3 below the mounting hole, keeping the free end of the conductive wire spring away from the mounting hole, greatly improving safety and facilitating assembly. The design of the peripheral ring 13 ensures a stable connection between the coupler base and the mounting hole, facilitating assembly and improving waterproofing.

[0020] The internal structure of this embodiment is reasonably laid out and has good water conductivity, which can improve the overflow test pass rate of the coupler, improve the safety performance of the electric coupler, and also enhance the safety and reliability of the electric coupler in humid environments, and better meet various standard requirements.

[0021] Although the present invention has been disclosed above with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended claims.

Claims

1. A temperature control coupler lower seat installed in a mounting hole of an electric heating base, characterized by: The utility model relates to an insulating lower seat shell (1) and a plurality of wiring spring leaves (3) installed in the electrode installation groove (2) of the insulating lower seat shell, the insulating lower seat shell (1) is provided with a center positioning column (11) and a plurality of isolation ring ribs (12) arranged in concentric circles on the front surface, annular grooves (5) are formed between the center positioning column (11) and the adjacent isolation ring ribs and between the adjacent two levels of isolation ring ribs and arranged coaxially, one end of the annular groove (5) is closed, the other end is provided with a hydrophobic missing hole (6) for the coupling end of the wiring spring leaf (3) to extend into, a guide recess (4) is formed along the ring at the connecting position of the annular groove (5) and the electrode installation groove (2), the lower bottom surface of the guide recess (4) is suspended above the wiring spring leaf extension section, that is, an empty fault layer is formed between the guide recess (4) and the wiring spring leaf extension section, the side walls of the annular groove (5) on both sides of the hydrophobic missing hole (6) are downwardly extended eaves edges (7), the coupling end of the wiring spring leaf (3) is in a suspended state, a water guide groove (9) is arranged on the annular groove (5) and communicates with the closed section away from the wiring spring leaf (3) between the hydrophobic missing hole (6) and the closed section, and a drain hole (8) is formed in the bottom surface of the water guide groove (9).

2. The temperature controlled coupler lower housing of claim 1, wherein: The vertical distance between the lower bottom surface of the guide recess (4) and the highest point of the wiring spring leaf, that is, the height of the empty fault layer, is greater than 1.5 mm.

3. The temperature controlled coupler lower housing of claim 1 or 2, wherein: The bottom of the insulating lower seat shell (1) is further provided with an outer isolation ridge (10) extending outward from the electrode installation groove (2) and covering the upper part of the wiring spring leaf (3), and when the whole machine is installed, the outer isolation ridge (10) covers and isolates the wiring spring leaf (3) below the panel of the whole machine and does not expose outward.

4. The temperature controlled coupler lower housing of claim 1 or 2, wherein: The bottom of the insulating lower seat shell (1) is provided with a peripheral ring table (13) connected with the outermost level of isolation ring ribs, and the outer isolation ridge (10) is located below the peripheral ring table (13), the upper surface of the peripheral ring table (13) is in a downward grade, that is, the peripheral ring table (13) comprises a first table ring (131) matched with the base mounting hole and a second table ring (132) connected at the outer peripheral edge of the first table ring (131) and abutting below the edge of the base mounting hole, and the second table ring (132) is provided with a mounting positioning groove (15) matched with the limiting position of the electric heater base bottom plate.

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