Power interface structure of household electrical appliance
By introducing a power distribution box and power connection device into the rice cooker, and using a time-delay relay and elastic conductive sheet to control the power on and off, the problem of electric arcs generated during the use of the rice cooker is solved, thus improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SHUNDE XINXUN ELECTRONIC TECH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-04-17
AI Technical Summary
Electric rice cookers are prone to generating electric arcs when the power is turned on or off, posing a risk of sparks and explosion, which affects safety.
The device employs a power distribution box and a power connection device, including a power distribution box, a connection plate, a card slot assembly, and a power connection device. It utilizes time-delay relays and elastic conductive sheets to control the power connection and disconnection process, thereby preventing the generation of electric arcs.
This effectively avoids electric arcing when the rice cooker is connected or disconnected from the power supply, thus improving safety during use.
Smart Images
Figure CN224138468U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of arc elimination technology, and in particular to a power interface structure for household appliances. Background Technology
[0002] An electric rice cooker is a modern cooking appliance that can perform various cooking methods such as steaming, boiling, stewing, simmering, and braising. It is a kitchen appliance that uses electric heat to cook food.
[0003] In the existing technology, when a rice cooker is connected to the power supply, the connection or disconnection of the power plug and the socket on the rice cooker body can cause an electric arc to generate sparks, which may even pose a risk of explosion, affecting people's normal use of the rice cooker and resulting in poor safety performance. Utility Model Content
[0004] This utility model embodiment provides a power interface structure for household appliances, which avoids electric arcs when the power is turned on or off during the daily use of rice cookers, effectively improving the safety of rice cookers during use.
[0005] To achieve the aforementioned objectives, this application adopts the following technical solution:
[0006] A power interface structure for household appliances, characterized in that it includes:
[0007] The rice cooker itself;
[0008] A power distribution box device connected to the rice cooker body includes a power distribution box, a connecting plate detachably connected to the inside of the power distribution box, and a card holder assembly detachably connected to the connecting plate. The connecting plate has evenly distributed card holes. The card holder assembly includes a card holder and a retractable card head connected to the card holder. A time delay relay is engaged on the card holder. The time delay relay is connected to the rice cooker control circuit inside the rice cooker body. The card heads are evenly distributed at the bottom of the card holder and cooperate with the card holes. The time delay relay is a low-voltage time delay relay.
[0009] A power connection device is embedded in the power distribution box device. The power connection device is compatible with the plug of the external power cord. The power connection device includes a connecting housing and a flexible movable double-ended integrated potentiometer. The double-ended integrated potentiometer has an abutment section and a conductive section connected to the abutment section. Flexible conductive sheets are also provided on the opposite ends of the conductive section.
[0010] In some alternative embodiments, the power distribution box is connected to the bottom of the rice cooker body.
[0011] In some alternative embodiments, connecting posts are provided at opposite corners inside the distribution box, and a sliding groove is provided along a vertical edge on the connecting post. A limiting platform is provided at the bottom of the sliding groove, and sliders are provided at opposite corners of the connecting plate. The sliders cooperate with the sliding grooves, and the sliding distance of the sliders is limited by the limiting platform.
[0012] In some alternative embodiments, anti-slip blocks are provided on the outer sidewalls of opposite sides of the card holder, with at least one set of anti-slip blocks on each sidewall.
[0013] In some alternative implementations, each group of anti-slip blocks includes at least six of the anti-slip blocks.
[0014] In some alternative embodiments, the top of the connecting housing is provided with a socket that mates with the plug of the external power cord.
[0015] In some alternative embodiments, a movable groove is provided on the inner sidewall of the bottom of the connecting housing, and a movable block is also provided on the A surface of the conductive segment, the movable block cooperating with the movable groove.
[0016] In some alternative embodiments, a normally open switch contact is connected through the inner side of one side wall of the connecting housing, the normally open switch being connected to the time delay relay to control the on / off state of the time delay relay.
[0017] In some alternative embodiments, the abutment section is connected to the opposite ends of the conductive section. The abutment section is a right-angled triangle with an inclined surface. The plug of the external power cord can move relative to the abutment section and the conductive section along the inclined surface of the abutment section, so that the abutment section abuts against the normally open switch contact.
[0018] In some alternative embodiments, the elastic conductive sheet is hinged to the conductive segment, a spring is sandwiched between the elastic conductive sheet and the conductive segment, and a spring is also sandwiched between one side wall of the conductive segment and the connecting housing.
[0019] The power interface structure for household appliances provided in this application has the following beneficial effects:
[0020] In the technical solution adopted in this application, a power distribution box device is connected to the rice cooker body. The power distribution box device includes a power distribution box, a connecting plate detachably connected inside the power distribution box, and a card holder assembly detachably connected to the connecting plate. Card holes are evenly distributed on the connecting plate. The card holder assembly includes a card holder and a retractable card head connected to the card holder. A time delay relay is engaged on the card holder. The time delay relay is connected to the rice cooker control circuit inside the rice cooker body. The card heads are evenly distributed at the bottom of the card holder and cooperate with the card holes. The time delay relay is a low-voltage time delay relay. A power connection device is embedded in the power distribution box device. The power connection device cooperates with the plug of the external power cord. The power connection device includes a connecting shell and a resiliently movable double-ended integrated potentiometer. The double-ended integrated potentiometer has a contact section and a conductive section connected to the contact section. Elastic conductive sheets are also provided at opposite ends of the conductive section. This prevents electric arcs when the power is turned on or off during daily use of the rice cooker, effectively improving the safety of the rice cooker during use. Attached Figure Description
[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0022] Figure 1 This is a perspective view of an electrical appliance according to an embodiment of this application;
[0023] Figure 2 This is a perspective view of a power distribution box according to an embodiment of this application;
[0024] Figure 3 This is a perspective view of a connecting plate according to an embodiment of this application;
[0025] Figure 4 This is a perspective view of a card holder assembly according to an embodiment of this application;
[0026] Figure 5 yes Figure 4 Enlarged view of circle A shown;
[0027] Figure 6 This is a partial structural diagram of the card header according to an embodiment of this application;
[0028] Figure 7 This is a structural diagram of a power connection device according to an embodiment of this application;
[0029] Figure 8 yes Figure 7 Enlarged view of circle B shown;
[0030] Figure 9 This is a perspective view of an external power cord according to an embodiment of this application;
[0031] Figure 10This is a circuit diagram of a power interface structure for a household appliance according to this application;
[0032] Figure 11 This is a circuit diagram of a positive / negative connection conversion circuit and heating device for a power interface structure of a household appliance, as described in this application.
[0033] Figure label:
[0034] 10. Rice cooker body;
[0035] 20. Distribution box assembly; 21. Distribution box; 211. Connecting post; 211A. Connecting hole; 212. Slide groove; 213. Limiting platform; 22. Connecting plate; 221. Locking hole; 222. Slider; 23. Locking seat assembly; 231. Locking seat; 232. Locking head; 233. Anti-slip block; 24. Time delay relay;
[0036] 30. Power connection device; 301. Connecting housing; 301A. Socket; 301B. Moving slot; 302. Dual-ended integrated potentiometer; 302A. Abutment section; 302B. Conductive section; 302B1. Elastic conductive sheet; 302B2. Moving block; 303. Normally open switch contact; 304. Spring; 31. External power cord; 311. Input terminal; 312. Output terminal; 32. Plug. Detailed Implementation
[0037] The specific embodiments of this application are described below with reference to the accompanying drawings and examples. Through the content described in this specification, those skilled in the art can clearly and completely understand the technical solution, the technical problem solved, and the resulting technical effects of this application. It is understood that the specific embodiments described herein are only for explaining this application and not for limiting it. Furthermore, for ease of description, only the parts related to this application are shown in the accompanying drawings.
[0038] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the contents described in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size should fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.
[0039] The use of terms such as "first," "second," and "the" does not imply quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or units, but may also include steps or units not listed, or other steps or units inherent to such processes, methods, products, or devices. The terms "connected," "linked," and "coupled" used in this application are not limited to physical or mechanical connections, but may also include direct or indirect electrical connections.
[0040] It should also be noted that the longitudinal section corresponding to the embodiment of this application can be the section corresponding to the front view direction, the transverse section can be the section corresponding to the right view direction, and the horizontal section can be the section corresponding to the top view direction.
[0041] Furthermore, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0042] refer to Figure 1 , Figure 1 This is a perspective view of an electrical appliance according to an embodiment of this application. Figure 1 As shown, a power interface structure for a household appliance includes a rice cooker body 10, a power distribution box device 20 connected to the rice cooker body 10, and a power connection device 30 embedded in the power distribution box device 20. It should be noted that the appliance in this application is a rice cooker as an example.
[0043] Continue to refer to Figure 1 Please refer to them together. Figure 2 , Figure 3 and Figure 4 , Figure 2 This is a perspective view of a power distribution box according to an embodiment of this application. Figure 3 This is a perspective view of a connecting plate according to an embodiment of this application. Figure 4 This is a perspective view of a card holder assembly according to an embodiment of this application. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the power distribution box device 20 is connected to the bottom of the rice cooker body 10. The power distribution box device 20 includes a power distribution box 21, a connecting plate 22 detachably connected to the inside of the power distribution box 21, and a card slot assembly 23 detachably connected to the connecting plate 22.
[0044] Continue to refer to Figure 2 Please refer to them together. Figure 5 , Figure 5 yes Figure 4An enlarged view of circle A shown. Figure 2 and Figure 5 As shown, there are connecting posts 211 at opposite corners inside the power distribution box 21. A sliding groove 212 is provided along a vertical edge of the connecting post 211. A limiting platform 213 is provided at the bottom of the sliding groove 212. A connecting hole 211A is also provided at the top of the connecting post 211. Furthermore, the power distribution box 21 is connected to the rice cooker body 10 through the mutual cooperation between the connecting hole 211A, the bolt and the connecting position on the rice cooker body 10.
[0045] Continue to refer to Figure 3 The connecting plate 22 has evenly distributed locking holes 221, and sliders 222 are respectively provided on two opposite corners of the connecting plate 22. The sliders 222 cooperate with the sliding grooves 212, and the sliding distance of the sliders 222 is limited by the limiting platform 213. The sliders 222 are T-shaped. Here, the sliders 222 cooperate with the sliding grooves 212 to realize the quick assembly and disassembly of the connecting plate 22 and the power distribution box 21. This facilitates the overall disassembly or installation of the connecting plate 22 with electronic components, or the disassembly or assembly of the connecting plate 22 alone, in preparation for the disassembly and assembly of the next step, the mounting bracket 23, thus improving the convenience of operation.
[0046] Continue to refer to Figure 4 Please refer to them together. Figure 6 , Figure 6 This is a partial structural diagram of the card header according to an embodiment of this application. For example... Figure 4 and Figure 6 As shown, the card holder assembly 23 includes a card holder 231 and a retractable card head 232 connected to the card holder 231. A time delay relay 24 is snapped onto the card holder 231. The time delay relay 24 is connected to the rice cooker control circuit inside the rice cooker body 10. The card heads 232 are evenly distributed at the bottom of the card holder 231 and are reserved at an appropriate distance under the action of the limiting platform 213 to meet the mutual cooperation between the card heads 232 and the card holes 221. Anti-slip blocks 233 are provided on the outer side walls on opposite sides of the card holder 231. Each side wall is provided with at least one set of anti-slip blocks 233, and each set of anti-slip blocks 233 includes at least six anti-slip blocks 233. It should be noted that the time delay relay 24 can be snapped onto the connecting plate 22 through the card holder 231 and installed inside the power distribution box 21. The time delay relay 24 is a 24V low-voltage time delay relay. Here, by providing anti-slip block 233 on the outer wall of the card holder 231, the friction is increased during the removal or installation of the card holder assembly 23, thereby improving the ease of operation.
[0047] refer to Figure 7 and Figure 8 , Figure 7 This is a structural diagram of a power connection device according to an embodiment of this application. Figure 8 yes Figure 7 An enlarged view of circle B shown. Figure 7 and Figure 8 As shown, the power connection device 30 cooperates with the plug 32 of the external power cord 31. The power connection device 30 is a two-phase power connection device or a three-phase power connection device. This technical solution takes a two-phase power supply as an example. The power connection device 30 includes a connecting housing 301 and a flexible movable double-headed integrated potentiometer 302. The top of the connecting housing 301 is provided with a socket 301A, which cooperates with the plug 32 of the external power cord 31. The inner side wall of the bottom of the connecting housing 301 is provided with a moving groove 301B. A normally open switch contact 303 is connected through the inner side of one side wall of the connecting housing 301. The normally open switch is connected to a time delay relay 24 to control the on and off of the time delay relay 24. The time delay relay 24 is used to avoid the electric arc caused by the rice cooker during the power connection or disconnection process, which effectively improves the safety of the rice cooker during use.
[0048] Continue to refer to Figure 7 and Figure 8 The dual-ended integrated potentiometer 302 has a contact section 302A and a conductive section 302B connected to the contact section 302A. The two opposite ends of the conductive section 302B are connected to the contact section 302A. The contact section 302A is a right-angled triangle with an inclined surface. The conductive section 302B also has an inclined surface. The plug 32 of the external power cord 31 can move relative to the contact section 302A and the conductive section 302B along the inclined surfaces of the contact section 302A and the conductive section 302B respectively, causing the contact section 302A to abut against the normally open switch contact 303. Specifically, the contact section 302A moves along the inclined surfaces of the contact section 302A and the conductive section 302B. The width of the moving groove 301B is L1, and the moving distance of the abutting section 302A along the moving groove 301B is L2, L1 = L2. After the plug 32 has moved along the inclined surface on the abutting section 302A and the inclined surface on the conductive section 302B respectively, the abutting section 302A close to the normally open switch contact 303 just completely abuts the normally open switch contact 303. This is to achieve the following: before powering on the rice cooker control circuit of the rice cooker body 10, the plug is first connected to the conductive section, and then the time delay relay 24 is activated to power on, so as to avoid directly powering on the rice cooker control circuit and causing an electric arc.
[0049] Continue to refer to Figure 8 Please refer to them together. Figure 9 and Figure 10 , Figure 9 This is a perspective view of an external power cord according to an embodiment of this application. Figure 10 This is a circuit diagram of a power interface structure for a household appliance according to this application. Figure 8 , Figure 9 and Figure 10As shown, elastic conductive sheets 302B1 are also provided at opposite ends of the conductive segment 302B. Furthermore, the elastic conductive sheets 302B1 are hinged to the conductive segment 302B, and a spring 304 is sandwiched between the elastic conductive sheets 302B1 and the conductive segment 302B to achieve elastic rebound of the elastic conductive sheets 302B1. Thus, after the plug 32 is inserted into the socket 301A of the power connection device 30 and fully inserted, the elastic conductive sheets 302B1 can always abut against the conductive head on the plug 32, preventing disconnection. A spring 304 is sandwiched between one side wall of the conductive segment 302B and the connecting housing 301 to achieve elastic reset of the dual-head integrated potentiometer 302. A movable block 302B2 is also provided on surface A of 2B. The movable block 302B2 cooperates with the movable groove 301B to realize the relative movement of the movable block 302B2 along the movable groove 301B. The external power supply line 31 is provided with an input terminal 311 and an output terminal 312, and plugs 32 are connected to both the input terminal 311 and the output terminal 312. Furthermore, the circuit in the appliance is that the arc extinguishing circuit in the appliance controls the on / off connection between the power connection device 30 (power interface) and the rice cooker control circuit. The rice cooker control circuit is a positive / reverse connection conversion circuit and a heating device. The arc extinguishing circuit is a time delay relay 24 connected to a normally open switch and a storage battery. It should be noted that the voltage of the storage battery is 24V.
[0050] refer to Figure 11 , Figure 11 This is a circuit diagram of a positive / negative connection conversion circuit and heating device for a household appliance power interface structure, as described in this application. Figure 11 As shown, the rice cooker control circuit consists of a rectifier bridge connected to a voltage regulator chip, model 78L05, which is connected to the heating element of R301. Its DAT1 and DAT2 are respectively connected to the power interface, and a time-delayed shutdown contact is connected in series between DAT1 and the power interface.
[0051] Here, a power distribution box device 20 is connected to the rice cooker body 10. The power distribution box device 20 includes a power distribution box 21, a connecting plate 22 detachably connected to the inside of the power distribution box 21, and a retaining bracket assembly 23 detachably connected to the connecting plate 22. The connecting plate 22 has evenly distributed retaining holes 221. The retaining bracket assembly 23 includes a retaining bracket 231 and retractable retaining heads 232 connected to the retaining bracket 231. A time delay relay 24 is engaged on the retaining bracket 231. It should be noted that there are various specifications of retaining brackets. The appropriate retaining bracket is selected according to the electronic components to be engaged. Here, a retaining bracket 231 corresponding to the external dimensions of the battery is selected, thereby engaging the battery onto the connecting plate 22. The time delay relay 24 is connected to the rice cooker control circuit inside the rice cooker body 10. The retaining heads 232 are evenly distributed on the retaining bracket 231. At the bottom, the clip 232 engages with the clip hole 221. The time-delay relay 24 is an energized time-delay type relay, and the voltage of the circuit controlling the time-delay relay is 24V. The circuit controlled by the time-delay relay is a DC voltage circuit. The power connection device 30 is embedded in the power distribution box device 20. The power connection device 30 engages with the plug 32 of the external power cord 31. The power connection device 30 includes a connecting housing 301 and a flexible movable double-headed integrated potentiometer 302. The double-headed integrated potentiometer 302 has a contact section 302A and a conductive section 302B connected to the contact section 302A. Elastic conductive sheets 302B1 are also provided on the opposite ends of the conductive section 302B. This prevents electric arcs from being caused when the power is turned on or off during daily use of the rice cooker, effectively improving the safety of the rice cooker during use.
[0052] To facilitate understanding, the working principle of this application is further described as follows: In the power interface structure of a household appliance, during use, after the plug 32 is inserted into the socket 301A, the plug 32 first abuts against the inclined surface of the abutting section 302A of the double-ended integrated potentiometer 302, and then abuts against the inclined surface of the conductive section 302B. During the abutting process, the double-ended integrated potentiometer 302 moves along the direction of the moving groove 301B under the mutual cooperation of the moving block 302B2 and the moving groove 301B. When the plug 32 abuts against the inclined surface of the conductive section 302B, the plug 32 is already connected to the conductive section 302B. This continues until the plug 32 abuts against the very end of the inclined surface formed by the abutting section 302A and the conductive section 302B. At this point, the abutting section 302A completely abuts against the normally open switch contact 303, thus activating the time-delay relay 24. Afterward, the plug 32 continues to be inserted until it fully contacts the elastic conductive piece 302B1. At this point, the rice cooker can be used normally.
[0053] The connecting plate 22 inside the distribution box 21 is assembled and disassembled through the mutual cooperation between the slider 222 and the slide groove 212. In addition, when disassembling the clip 232, the clip 232 is pressed towards the center of the clip 232 to retract the card on the clip 232, thereby separating the clip 232 from the card hole 221, thus realizing the separation of the card holder 231 from the card hole 221. For easier operation, the anti-slip slider 233 can be held by hand to increase the friction between it and the card holder 231.
[0054] Although this application has been described and illustrated with reference to specific embodiments thereof, such description and illustration are not limiting of this application. It will be readily understood by those skilled in the art that various changes can be made and equivalent elements can be substituted within embodiments without departing from the true spirit and scope of this application as defined by the appended claims. Illustrations may not be drawn to scale. Differences may exist between the technical representation in this application and actual implementation due to variables in the manufacturing process, etc. Other embodiments of this application may exist that are not specifically described. The description and illustrations should be considered illustrative rather than restrictive. Modifications can be made to adapt particular circumstances, materials, composition, methods, or processes to the objectives, spirit, and scope of this application. All such modifications fall within the scope of the appended claims. While the methods disclosed herein have been described with reference to specific operations performed in a particular order, it should be understood that these operations can be combined, subdivided, or reordered to form equivalent methods without departing from the teachings of this application. Therefore, unless specifically indicated herein, the order and grouping of operations do not limit this application.
Claims
1. A power supply interface structure for a domestic appliance, characterized in that, include Rice cooker body (10); A power distribution box device (20) is connected to the rice cooker body (10). The power distribution box device (20) includes a power distribution box (21), a connecting plate (22) detachably connected to the inside of the power distribution box (21), and a card holder assembly (23) detachably connected to the connecting plate (22). Card holes (221) are evenly distributed on the connecting plate (22). The card holder assembly (23) includes a card holder (231) and a retractable card head (232) connected to the card holder (231). A time delay relay (24) is snapped onto the card holder (231). The time delay relay (24) is connected to the rice cooker control circuit inside the rice cooker body (10). The card head (232) is evenly distributed on the bottom of the card holder (231). The card head (232) cooperates with the card hole (221). The time delay relay (24) is a low-voltage time delay relay. A power connection device (30) is embedded in the power distribution box device (20). The power connection device (30) cooperates with the plug (32) of the external power cord (31). The power connection device (30) includes a connecting housing (301) and a flexible movable double-ended integrated potentiometer (302). The double-ended integrated potentiometer (302) is provided with an abutment section (302A) and a conductive section (302B) connected to the abutment section (302A). Flexible conductive sheets (302B1) are also provided on the opposite ends of the conductive section (302B).
2. The power interface structure of the household appliance according to claim 1, characterized in that, The power distribution box device (20) is connected to the bottom of the rice cooker body (10).
3. The power interface structure of the household appliance according to claim 2, characterized in that, The power distribution box (21) has connecting posts (211) at opposite corners. The connecting posts (211) have a sliding groove (212) along a vertical edge. The bottom of the sliding groove (212) has a limiting platform (213). The connecting plate (22) has sliders (222) at opposite corners. The sliders (222) cooperate with the sliding groove (212), and the sliding distance of the sliders (222) is limited by the limiting platform (213).
4. The power interface structure of the household appliance according to claim 1, characterized in that, Anti-slip blocks (233) are provided on the outer side walls of opposite sides of the card holder (231), and at least one set of anti-slip blocks (233) is provided on each side wall.
5. The power interface structure of the household appliance according to claim 4, characterized in that, Each set of the anti-slip blocks (233) includes at least six of the anti-slip blocks (233).
6. The power interface structure of the household appliance according to claim 1, characterized in that, The top of the connecting housing (301) is provided with a socket (301A), which is engaged with the plug (32) of the external power cord (31).
7. The power interface structure of the household appliance according to claim 6, characterized in that, The bottom inner wall of the connecting housing (301) is provided with a moving groove (301B), and the A surface of the conductive segment (302B) is also provided with a moving block (302B2), which cooperates with the moving groove (301B).
8. The power interface structure of the household appliance according to claim 7, characterized in that, A normally open switch contact (303) is connected through the inner side of one side wall of the connecting housing (301). The normally open switch is connected to the time delay relay (24) to control the on / off state of the time delay relay (24).
9. The power interface structure of the household appliance according to claim 8, characterized in that, The conductive segment (302B) is connected to the abutment segment (302A) at its opposite ends. The abutment segment (302A) is a right triangle with an inclined surface. The plug (32) of the external power cord (31) can move relative to the abutment segment (302A) and the conductive segment (302B) along the inclined surface on the abutment segment (302A), and make the abutment segment (302A) abut against the normally open switch contact (303).
10. The power interface structure of the household appliance according to claim 9, characterized in that, The elastic conductive sheet (302B1) is hinged to the conductive segment (302B), and a spring (304) is sandwiched between the elastic conductive sheet (302B1) and the conductive segment (302B). A spring (304) is also sandwiched between one side wall of the conductive segment (302B) and the connecting housing (301).