Electric kettle heating plate base

Abstract

The utility model discloses a heating plate base of an electric kettle, which relates to the field of kitchen appliances and is characterized by comprising a shell, a heating plate is arranged in the middle of the shell, three circular grooves are arranged on the heating plate, three contact pieces are respectively mounted in the three circular grooves, a placing cavity is arranged on the shell, a protective block is arranged in the placing cavity, and an elastic piece is arranged in the placing cavity. After water boiling is completed, people take away the kettle from the base, at the moment, the collision of the kettle to the protection block disappears, the elastic piece is released and provides a force for the protection block to move back to the bottom wall of the containing cavity, the protection block slides under the action of the force to abut against the contact piece, and the contact piece is prevented from making contact with the contact piece for a long time. The rubber sleeve is made of fluororubber and completely covers the contact piece, so that oxidation of the contact piece caused by long-time contact with air at a high temperature is effectively reduced, and the rubber sleeve made of fluororubber has a long service life.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliances, and more specifically, to the heating plate base of an electric kettle. Background Technology

[0002] An electric kettle, also known as an electric water kettle, is a tool that converts electrical energy into internal energy. In the present technology, an electric kettle includes a kettle and a base for connecting to a socket. The base includes a shell and a power cord, and a heating plate for connecting to the kettle is formed in the middle of the shell.

[0003] The heating plate is usually cylindrical, with three concentric grooves of progressively larger diameter. Each of these three grooves has a metal contact piece on its sidewall. These three contact pieces are connected to the live wire, neutral wire, and ground wire of the power cord, respectively. The bottom of the kettle has three annular contact pieces, which are used to connect with the three contact pieces to form a circuit.

[0004] When boiling water in an electric kettle, current continuously flows through the contact piece. After boiling is complete and the kettle is removed from the base, the contact piece is at a high temperature and in direct contact with the air, which can easily cause oxidation. Over time, this will form many oxidation points on the surface of the contact piece, resulting in poor contact between the contact piece and the contact plate.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heating plate base for electric kettles.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a heating plate base for an electric kettle, including a shell, a heating plate in the middle of the shell, three circular grooves with progressively increasing diameters on the heating plate, three contact pieces installed in the three circular grooves respectively, a placement cavity in the shell communicating with all three circular grooves, a protective block that can slide simultaneously in the three circular grooves in the placement cavity, an elastic element in the placement cavity for the protective block to move toward the top surface of the heating plate, and the protective block for preventing the contact pieces from being in contact with air for a long time.

[0008] The present invention is further configured such that: a support rod is provided on the bottom wall of the placement cavity, and the elastic element is a compression spring sleeved on the support rod, with the two ends of the compression spring respectively abutting against the bottom wall of the placement cavity and the protective block.

[0009] The present invention is further configured such that: the cross-section of the support rod is square, and the inner diameter of the compression spring is equal to the diameter of the circumcircle of the support rod.

[0010] The present invention is further configured such that: the protective block includes a disc slidably connected to the support rod and a plurality of inserts formed at one end of the disc, and the outside of each of the plurality of inserts is fitted with a rubber sleeve for fitting with the contact piece.

[0011] The present invention is further configured such that several rubber sleeves are connected by a connecting piece located at their bottom.

[0012] The present invention is further configured such that all the rubber sleeves are made of high-temperature resistant rubber.

[0013] In summary, this utility model has the following beneficial effects: After boiling water, people remove the kettle from the base. At this time, the kettle's resistance to the protective block disappears, the elastic element is released, and it provides a force for the protective block to move away from the bottom wall of the placement cavity. Under the action of this force, the protective block slides and abuts against the contact piece, and completely covers the contact piece, thereby effectively reducing the oxidation of the contact piece caused by prolonged contact with air at high temperatures. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial cross-sectional view of the present invention;

[0016] Figure 3 This is an exploded view of the protective block in this utility model.

[0017] In the diagram: 1. Outer shell; 2. Heating plate; 3. Circular groove; 4. Contact piece; 5. Placement cavity; 6. Elastic element; 7. Support rod; 8. Circular disc; 9. Insert block; 10. Rubber sleeve; 11. Connecting piece. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Electric kettle heating plate base, such as Figure 1 and Figure 2As shown, the device includes a housing 1, with a heating plate 2 installed in the middle of the housing 1. The heating plate 2 has three circular grooves 3 with progressively increasing diameters. Three contact pieces 4 are installed in the three circular grooves 3 respectively. The housing has a placement cavity 5 that communicates with all three circular grooves 3. The placement cavity 5 has a protective block that can slide simultaneously in the three circular grooves 3. The placement cavity 5 has an elastic element 6 that provides the protective block with a force to move towards the top surface of the heating plate 2. The protective block is used to prevent the contact pieces 4 from being in contact with air for a long time. After boiling water, the kettle is removed from the base. At this time, the kettle's resistance to the protective block disappears, the elastic element 6 is released, and it provides a force for the protective block to move away from the bottom wall of the placement cavity 5. Under the action of this force, the protective block slides and abuts against the contact pieces 4, completely covering the contact pieces 4, thereby effectively reducing the oxidation of the contact pieces 4 caused by prolonged contact with air at high temperatures.

[0020] like Figure 2 As shown, a support rod 7 is provided on the bottom wall of the placement cavity 5, with one end abutting against the bottom of the heating plate 2. The elastic element 6 is a compression spring sleeved on the support rod 7. The two ends of the compression spring abut against the bottom wall of the placement cavity 5 and the protective block, respectively. Using a compression spring as the elastic element 6 makes the structure of the elastic element 6 simple and easy to manufacture. Moreover, the compression spring has reliable working performance and can better ensure the function of the elastic element 6. When people place the kettle on the base, the protective block moves towards the bottom wall of the placement cavity 5 under the pressure of the kettle and forces the compression spring to be compressed along the support rod 7. The setting of the support rod 7 allows the compression spring to deform well in its length direction, avoiding the compression spring from being compressed. The radial deformation allows the compression spring to consistently provide a force to the protective block that moves away from the bottom wall of the placement cavity 5 throughout its service life. In addition, when the kettle is placed on the heating plate 2, it also exerts pressure on the heating plate 2. The support rod 7 provides good support for the heating plate 2, effectively preventing the heating plate 2 from collapsing in the placement cavity 5 due to long-term pressure from the kettle. The cross-section of the support rod 7 is square, and the inner diameter of the compression spring is equal to the diameter of the circumscribed circle of the support rod 7. The cubic prism-shaped support rod 7 can provide good guidance for the protective block sliding on it, preventing the protective block from rotating in the placement cavity 5, thus making the rising process of the protective block more stable.

[0021] like Figure 1 and Figure 3As shown, the protective block includes a disc 8 slidably connected to the support rod 7 and several inserts 9 formed at one end of the disc 8. Each insert 9 has a rubber sleeve 10 installed on its exterior for contacting the contact piece 4. When the kettle is removed, the compression spring is released, pushing the disc 8 away from the bottom wall of the placement cavity 5. The disc 8 drives the inserts 9 to move, and the inserts 9 provide good support for the rubber sleeves 10, allowing them to be inserted well into the groove 3. Due to its good elasticity, the rubber sleeve 10 effectively resists the contact piece 4, preventing the contact piece 4 from contacting the outside air. Simultaneously, the excellent insulation of the rubber sleeve 10 also ensures good safety for the base. The rubber sleeves 10 are connected by connecting pieces 11 located at their bottom. Specifically, the rubber is formed in one piece through a hot-press molding process, allowing the rubber sleeves 10 to be connected together. The sleeve 10 and the connecting piece 11 are integrally formed. This design allows the installer to simply align the rubber sleeve 10 with the insert 9 during the production of the protective block, and then press the connecting piece 11 to make it contact the disc 8 to complete the installation of the rubber sleeve 10 on all the inserts 9. Compared with installing the rubber sleeve 10 one by one on the inserts 9, this solution is more efficient. At the same time, when the protective block slides in the circular groove 3, the rubber sleeves 10 connected by the connecting piece 11 have good integrity and are less likely to detach from the inserts 9. The rubber sleeve 10 is made of high-temperature resistant rubber, specifically fluororubber. The fluororubber rubber sleeve 10 has good heat resistance and is well adapted to the working environment inside the heating plate 2, thus giving the rubber sleeve 10 a long service life.

[0022] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A heating plate base for an electric kettle, characterized in that: The device includes a housing (1), a heating plate (2) in the middle of the housing (1), three circular grooves (3) with progressively increasing diameters on the heating plate (2), three contact pieces (4) installed in the three circular grooves (3), a placement cavity (5) connected to the three circular grooves (3) on the housing (1), a protective block that can slide in the three circular grooves (3) simultaneously in the placement cavity (5), and an elastic element (6) that provides the protective block to move toward the top surface of the heating plate (2) in the placement cavity (5). The protective block is used to prevent the contact pieces (4) from being in contact with the air for a long time.

2. The electric kettle heating plate base according to claim 1, characterized in that: The bottom wall of the placement cavity (5) is provided with a support rod (7), and the elastic element (6) is a compression spring sleeved on the support rod (7). The two ends of the compression spring abut against the bottom wall of the placement cavity (5) and the protective block, respectively.

3. The electric kettle heating plate base according to claim 2, characterized in that: The cross-section of the support rod (7) is square, and the inner diameter of the compression spring is equal to the diameter of the circumcircle of the support rod (7).

4. The electric kettle heating plate base according to claim 3, characterized in that: The protective block includes a disc (8) slidably connected to the support rod (7) and a plurality of inserts (9) formed at one end of the disc (8), and the outside of the plurality of inserts (9) is fitted with rubber sleeves (10) for fitting with the contact piece (4).

5. The electric kettle heating plate base according to claim 4, characterized in that: Several of the rubber sleeves (10) are connected by connecting pieces (11) located at their bottoms.

6. The electric kettle heating plate base according to claim 5, characterized in that: The rubber sleeves (10) are all made of high-temperature resistant rubber.

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