Pin type coupler and electric kettle

Abstract

The utility model relates to a pin type coupler and electric kettle, including round upper coupler and lower coupler, the upper coupler is equipped with conducting circuit and sensing circuit, conducting circuit is equipped with dry-burning prevention switch and dry-burning prevention device that connects and disconnects dry-burning prevention switch, the sensing circuit is equipped with sensing circuit, the sensing circuit is equipped with sensing circuit, the sensing circuit is equipped with sensing circuit, and the sensing circuit is equipped with sensing circuit. The bottom of the upper coupler is provided with an insertion cavity coupled with the lower coupler, the upper coupler is connected with a plurality of insertion pins which extend towards the insertion cavity and are distributed along the same circumference, and the plurality of insertion pins are connected with the conductive circuit, the sensing circuit and the dry burning prevention device. The lower coupler is provided with a plurality of jacks which are distributed along the same circumference corresponding to the pins. A plurality of insertion springs which are in elastic contact with the pins are arranged in the lower coupler and correspond to the jacks. The electric kettle adopts the contact pin type coupler with the structure, so that the problem of poor contact of the electric conductor in the coupler due to scale and stain after long-term use is solved.

Description

Technical Field

[0001] The utility model relates to the field of electric kettles, in particular to a pin-type coupler and an electric kettle. Background Art

[0002] The electric kettle mainly comprises a base and a kettle body mounted on the base. In order to electrically connect the heating element and the sensing element in the kettle body to the controller of the base, a lower coupler is conventionally arranged on the base, and an upper coupler electrically coupled to the lower coupler is arranged at the bottom of the kettle body, wherein the conductor of the upper coupler comprises a plurality of concentric copper rings of different diameters, and the lower coupler is provided with a spring piece with a contact, and the contact touches the side or the top of the copper ring, so that power is turned on during electrical coupling. However, during use, it is inevitable that water or foreign matter will come into contact with the copper ring or spring piece of the upper coupler or the lower coupler. After long-term use, scale or other stains will accumulate on the surface of the contact or spring piece, and the copper ring will have poor contact with the contact during conductive electrical coupling, resulting in affected power-on efficiency between the upper and lower couplers, and less stable signal transmission. The present applicant provides a new solution to the above-mentioned problems through further improvement and perfection of the structure for consumers to choose and use. Summary of the invention

[0003] The utility model aims to provide a pin-type coupler and an electric kettle which have simple and reasonable structure, convenient installation and stable structure.

[0004] A pin-type coupler comprises a circular upper coupler and a lower coupler, the upper coupler being provided with a conductive circuit, a sensing circuit and an anti-dry-burning device, the conductive circuit being connected in series with an anti-dry-burning switch, the anti-dry-burning device being adjacent to or abutting against the anti-dry-burning switch, the bottom of the upper coupler being provided with a plug-in cavity for coupling with the lower coupler, the upper coupler being connected with a plurality of pins extending toward the plug-in cavity and distributed along the same circumference, the plurality of pins being electrically connected to the conductive circuit, the sensing circuit and the anti-dry-burning device respectively, the lower coupler being provided with a plurality of sockets distributed along the same circumference corresponding to the pins, and a plurality of plug springs elastically contacting with the pins being provided below the corresponding sockets in the lower coupler.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, the plurality of pins are divided into two pin groups, each pin group includes a high-current pin, a low-point pin and a ground pin, and the arrangement order of the high-current pin, the low-point pin and the ground pin of one pin group is opposite to the arrangement order of the other pin group.

[0007] As a further solution, two blank areas are provided between the two groups of pin groups. The two blank areas and the high-current pins, weak-point pins and ground pins in the two groups of pin groups are evenly spaced along the same circle, and the two blank areas and two of the high-current pins, weak-point pins and ground pins are arranged on opposite sides of the symmetry line of the upper coupler.

[0008] As a further solution, each pin includes a main body, the diameter of which remains constant along the length direction and the bottom end of which is rounded or pointed; an introduction slope that cooperates with the bottom end of the pin is provided along the outer periphery of each socket on the lower coupler.

[0009] As a further solution, the plurality of springs include two high-current springs that touch the two high-current pins respectively, two low-current springs that touch the two low-current pins respectively, and one ground wire spring that touches one of the two ground wire pins.

[0010] As a further solution, the anti-dry-burn switch includes a live contact piece group and a neutral contact piece group, each of which includes a fixed contact piece and a moving contact piece, the fixed end of the moving contact piece is electrically connected to the top of the strong current pin, the movable end of the moving contact piece is elastically connected to one end of the fixed contact piece, and the other end of the fixed contact piece extends out of the upper coupler;

[0011] The sensing circuit is serially connected with a D1 terminal piece and a D2 terminal piece, one end of each of which is electrically connected to the top of a weak point pin, and the other end of each of which extends out of the upper coupler.

[0012] As a further solution, the anti-dry burning device includes a metal heat-conducting plate, and the top ends of the two ground wire pins are electrically connected to the metal heat-conducting plate; a device bracket is clamped between the metal heat-conducting plate and the upper coupling seat, and two insulating rods are slidably connected to the device bracket, and the two insulating rods are respectively pressed against the movable ends of the two moving contact pieces, and hot-melt particles are arranged between one of the insulating rods and the metal heat-conducting plate, and a bimetallic strip adjacent to or against the other insulating rod is connected to the metal heat-conducting plate.

[0013] As a further solution, an elastic support arm is connected to the metal heat conducting plate, a mounting opening is opened at the end of the elastic support arm, a temperature sensing probe is installed in the mounting opening, and two lead wires of the temperature sensing probe are electrically connected to the D1 terminal piece and the D2 terminal piece respectively.

[0014] An electric kettle comprises a base and a kettle body mounted on the base, wherein the above-mentioned pin-type coupler is connected between the kettle body and the base, wherein the upper coupler is fixed on the kettle body, and the lower coupler is fixed on the base.

[0015] As a further solution, the base is provided with a pot body fool-proofing portion, and the pot body is provided with a fool-proofing matching portion that matches with the pot body fool-proofing portion.

[0016] As a further solution, the base is provided with a pot body cavity with an upper opening, the lower coupler is fixedly arranged at the center of the bottom of the pot body cavity, the pot body is detachably adapted to be placed in the pot body cavity, and the upper coupler is connected to the bottom thereof to couple with the lower coupler;

[0017] The fool-proof matching part includes two lifting ears arranged on opposite sides of the upper part of the kettle body, and the fool-proof part of the kettle body includes two positioning grooves, and the two positioning grooves are opened and matched with the side edges of the upper opening and the lifting ears.

[0018] The utility model discloses a pin-type coupler and an electric kettle. When the electric kettle adopts the pin-type coupler of the structure, the contact area between the pin and the plug spring is larger, the efficiency of power supply and signal transmission are more stable and efficient, and each time the pin is inserted into the plug spring, the plug spring will scrape the scale or stain on the surface of the pin, thereby solving the problem of poor contact of the conductors in the upper and lower couplers due to scale and stain after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of the pin distribution structure in the utility model.

[0021] Figure 3 It is a schematic diagram of the distribution structure of the plug spring in the utility model.

[0022] Figure 4 This is a schematic diagram of the pin structure in the utility model.

[0023] Figure 5 It is a schematic diagram of the partially enlarged structure of the lower coupler in the utility model.

[0024] Figure 6 This is a schematic diagram of the exploded structure of the coupler in the utility model.

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the electric kettle in the utility model. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figures 1 to 6As shown, a pin-type coupler comprises a circular upper coupler 1 and a lower coupler 2, the upper coupler 1 being provided with a conductive circuit, a sensing circuit and an anti-dry-burning device 4, the conductive circuit being connected in series with an anti-dry-burning switch 3, the anti-dry-burning device 4 being adjacent to or abutting against the anti-dry-burning switch 3, a plug-in cavity 101 for coupling with the lower coupler 2 being provided at the bottom of the upper coupler 1, a plurality of pins 5 extending toward the plug-in cavity 101 and distributed along the same circumference being connected to the upper coupler 1, the plurality of pins 5 being electrically connected to the conductive circuit, the sensing circuit and the anti-dry-burning device 4 respectively, a plurality of jacks 201 distributed along the same circumference being provided on the lower coupler 2 corresponding to the pins 5, a plurality of plug springs 6 elastically contacting with the pins 5 being provided below the corresponding jacks 201 in the lower coupler 2.

[0028] When the electric kettle adopts the pin-type coupler of this structure, the contact area between the pin 5 and the plug spring 6 is larger during use, the efficiency of power supply and signal transmission is more stable and efficient, and each time the pin 5 is inserted into the plug spring 6, the plug spring 6 will scrape the scale or stain on the surface of the pin 5, thereby solving the problem of poor contact of the conductors in the upper and lower couplers 2 due to scale and stains after long-term use.

[0029] The plurality of pins 5 are divided into two pin groups, each pin group includes a strong current pin 5a, a weak point pin 5b and a ground pin 5c, wherein the arrangement order of the strong current pin 5a, the weak point pin 5b and the ground pin 5c of one pin group is opposite to the arrangement order of the other pin group; after the upper coupler 1 is electrically coupled with the lower coupler 2 at two unique angles, the conductive circuit, the sensing circuit and the ground wire can still be connected for use.

[0030] Two blank areas D are also provided between the two groups of pin groups. The two blank areas D and the strong current pins 5a, weak point pins 5b and ground pins 5c in the two groups of pin groups are evenly spaced along the same circumference, and the two blank areas D and two strong current pins 5a, weak point pins 5b and ground pins 5c are all arranged on opposite sides of the symmetry line of the upper coupler 1; this structure makes the only two angles of the upper coupler 1 at 0° and 180°, which is convenient for the assembly and use of the electric kettle.

[0031] Each plug pin 5 includes a main body 51, the diameter of which remains constant along the length direction, and the bottom end of which is a round head or a pointed head structure 52; an introduction slope 202 that cooperates with the bottom end of the plug pin 5 is provided along the outer periphery of each plug hole 201 on the lower coupler 2; the introduction slope 202 can improve the efficiency of inserting the plug pin 5 into the plug hole 201 and play a guiding role.

[0032] The plurality of springs 6 include two high-current springs 6a that touch the two high-current pins 5a respectively, two low-current springs 6b that touch the two low-current pins 5 respectively, and one ground spring 6c that touches one of the two ground pins 5c; since there are only two matching angles between the upper coupler 1 and the lower coupler 2, but the wires do not need to form a loop, only one ground spring 6c needs to be set on the lower coupler 2. When the upper coupler 1 and the lower coupler 2 are electrically coupled, one of the ground pins 5c can be inserted into the ground spring 6c.

[0033] The anti-dry-burning switch 3 includes a live contact piece group and a neutral contact piece group, each of which includes a fixed contact piece 31 and a moving contact piece 32, the fixed end of the moving contact piece 32 is electrically connected to the top of the strong current pin 5a, the movable end of the moving contact piece 32 is elastically connected to one end of the fixed contact piece 31, and the other end of the fixed contact piece 31 extends out of the upper coupler 1;

[0034] The sensing circuit is serially connected with a D1 terminal piece 71 and a D2 terminal piece 72, one end of each of which is electrically connected to the top of a weak point pin 5b, and the other end of each of which extends out of the upper coupler 1.

[0035] The anti-dry burning device 4 includes a metal heat conducting plate 41, and the top ends of the two ground wire pins 5c are electrically connected to the metal heat conducting plate 41; a device bracket 42 is sandwiched between the metal heat conducting plate 41 and the upper coupling seat, and two insulating rods 43 are slidably connected to the device bracket 42, and the two insulating rods 43 are respectively pressed against the movable ends of the two moving contact pieces 32, and hot melt particles 44 are arranged between one of the insulating rods 43 and the metal heat conducting plate 41, and a bimetallic strip 45 adjacent to or against the other insulating rod 43 is connected to the metal heat conducting plate 41;

[0036] The hot melt particles 44 and the bimetallic strip 45 play a role in preventing dry burning, and act on the live wire contact piece group and the neutral wire contact piece group respectively, and play a double insurance role at the same time.

[0037] The metal heat conducting plate 41 is connected to an elastic support arm 411, and a mounting opening is provided at the end of the elastic support arm 411. A temperature sensing probe 8 is installed in the mounting opening. Two lead wires 801 of the temperature sensing probe 8 are electrically connected to the D1 terminal piece 71 and the D2 terminal piece 72 respectively. Since the elastic support arm 411 has the ability to reset under pressure, the temperature sensing end face of the temperature sensing probe 8 is always in close contact with the heating element, so that the temperature sensing probe 8 can accurately sense the temperature and reduce interference factors.

[0038] The embodiment of the present application is also applied to an electric kettle, such as Figure 7As shown, it includes a base 9 and a kettle body 10 seated on the base 9, and the above-mentioned pin-type coupler is connected between the kettle body 10 and the base 9, wherein the upper coupler 1 is fixed on the kettle body 10, and the lower coupler 2 is fixed on the base 9.

[0039] The base 9 is provided with a pot body anti-foolproofing part, and the pot body 10 is provided with an anti-foolproofing matching part that matches with the pot body anti-foolproofing part; there are only two matching angles between the upper coupler 1 and the lower coupler 2, and anti-foolproofing is achieved by the pot body anti-foolproofing part and the anti-foolproofing matching part between the base 9 and the pot body 10.

[0040] Specifically, the base 9 is provided with a pot body cavity 901 with an upper opening, the lower coupler 2 is fixedly arranged at the center of the bottom of the pot body cavity 901, the pot body 10 is detachably adapted to be placed in the pot body cavity 901, and the upper coupler 1 is connected at the bottom thereof to couple with the lower coupler 2;

[0041] The fool-proof matching part includes two lifting ears 11 arranged on opposite sides of the upper part of the kettle body 10 , and the fool-proof matching part of the kettle body includes two positioning grooves 12 , and the two positioning grooves 12 are opened and matched with the lifting ears 11 on the side of the upper opening.

[0042] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A pin coupler comprising a circular upper coupler and a lower coupler, wherein the upper coupler is provided with a conductive circuit, a sensing circuit, and a boil-dry prevention device, the conductive circuit is connected in series with an boil-dry prevention switch, and the boil-dry prevention device is adjacent to or offsets the boil-dry prevention switch, characterized in that: The bottom of the upper coupler is provided with a plug-in cavity coupled to the lower coupler. The upper coupler is provided with two groups of pins extending into the plug-in cavity. Each pin group includes a high-current pin, a low-current pin, and a ground pin distributed along the same circumference. The high-current pin, low-current pin, and ground pin of one pin group are arranged in the opposite order to that of the other pin group. The lower coupler is provided with a plurality of sockets corresponding to each pin. A plurality of springs are provided below the corresponding sockets in the lower coupler to elastically contact the pins.

2. The pin coupler according to claim 1, wherein: There are also two blank areas between the two groups of pin groups. The two blank areas and the high-current pins, weak-point pins and ground pins in the two groups of pin groups are evenly spaced along the same circumference, and the two blank areas and two high-current pins, weak-point pins and ground pins are all arranged on opposite sides of the symmetry line of the upper coupler.

3. The pin coupler according to claim 1, wherein: Each pin includes a main body, the diameter of which remains constant along the length direction, and the bottom end of which is rounded or pointed; an introduction slope is provided on the outer periphery of each socket of the lower coupler to cooperate with the bottom end of the pin.

4. A pin coupler according to claim 1 or 2, characterized in that: The plurality of plug springs include two high-voltage plug springs that touch the two high-voltage pins respectively, two low-voltage plug springs that touch the two low-voltage pins respectively, and one ground wire plug spring that touches one of the two ground wire pins.

5. The pin coupler according to claim 1, wherein: The anti-dry-burn switch includes a live contact group and a neutral contact group, each of which includes a fixed contact and a movable contact. The fixed end of the movable contact is electrically connected to the top of the high-voltage pin, the movable end of the movable contact is elastically connected to one end of the fixed contact, and the other end of the fixed contact extends out of the upper coupler. The sensing circuit is connected in series with a D1 terminal piece and a D2 terminal piece, one end of each of the D1 terminal piece and the D2 terminal piece is electrically connected to the top of a weak point pin, and the other end of each of the D1 terminal piece and the D2 terminal piece extends out of the upper coupler.

6. The pin coupler according to claim 5, characterized in that: The anti-dry burning device includes a metal heat-conducting plate, and the top ends of the two ground pins are electrically connected to the metal heat-conducting plate; a device bracket is clamped between the metal heat-conducting plate and the upper coupling seat, and two insulating rods are slidably connected to the device bracket, and the two insulating rods are respectively pressed against the movable ends of the two moving contact pieces, and hot-melt particles are arranged between one of the insulating rods and the metal heat-conducting plate, and a bimetallic strip adjacent to or against the other insulating rod is connected to the metal heat-conducting plate.

7. The pin coupler according to claim 6, characterized in that: An elastic support arm is connected to the metal heat conducting plate, and a mounting opening is provided at the end of the elastic support arm. A temperature sensing probe is installed in the mounting opening, and two lead wires of the temperature sensing probe are electrically connected to the D1 terminal piece and the D2 terminal piece respectively.

8. An electric kettle comprising a base and a kettle body mounted on the base, characterized in that : A pin-type coupler according to any one of claims 1 to 7 is connected between the kettle body and the base, wherein the upper coupler is fixed on the kettle body and the lower coupler is fixed on the base.

9. The electric kettle according to claim 8, characterized in that: The base is provided with a pot body fool-proofing portion, and the pot body is provided with a fool-proofing matching portion that matches the pot body fool-proofing portion.

10. The electric kettle according to claim 9, characterized in that: The base is provided with a pot body cavity with an upper opening, the lower coupler is fixedly arranged at the center of the bottom of the pot body cavity, the pot body is detachably adapted to be placed in the pot body cavity, and the upper coupler is connected to the bottom of the pot body cavity to couple with the lower coupler; The fool-proof matching part includes two lifting ears arranged on opposite sides of the upper part of the kettle body, and the fool-proof part of the kettle body includes two positioning grooves, and the two positioning grooves are opened and matched with the side edges of the upper opening and the lifting ears.

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