Internal and external split type connecting structure of NTC (Negative Temperature Coefficient) and double fuses of electric cooker

Abstract

The utility model relates to an electric cooker NTC and double fuse internal and external split type connection structure, which relates to the technical field of electronic component connection, and comprises an outer shell and an inner slide block, and the outer shell and the inner slide block are provided with the same connection mechanism; the connecting mechanism comprises a connecting part A and a connecting part B which are used for connecting the outer shell and the inner sliding block. According to the internal and external split type connecting structure of the NTC and the double fuses of the electric cooker, a connecting mechanism on the outer shell and the inner sliding block comprises a limiting block, an arc-shaped groove, a semi-ring groove, a ring piece and the like, enough creepage distance is provided, the phenomenon of electric leakage can be effectively prevented even in a high-humidity or polluted environment, and the service life of the electric cooker is prolonged. The insulation performance of the whole circuit system is improved, so that the insulation performance of the whole circuit is improved, stricter UL safety specification requirements can be met, and the problems of poor insulation performance and insufficient creepage distance of some left-right split structures in the market are solved.

Description

Technical Field

[0001] This utility model relates to the field of electronic component connection technology, specifically to an internal and external separate connection structure for an electric rice cooker NTC and a double fuse. Background Technology

[0002] In a rice cooker, an NTC (Non-Temperature Coefficient) is a thermistor whose resistance decreases as the temperature rises, exhibiting a negative temperature coefficient. It is used to monitor the temperature changes of the inner pot in real time. When the temperature reaches the set value (such as during the rice boiling or keep-warm stage), the control system adjusts the heating power based on the resistance value fed back by the NTC. A rice cooker fuse is a protective electrical appliance that breaks the circuit by melting the fusible element when the current exceeds a specified value, using the heat generated by the fuse itself.

[0003] Because some rice cookers on the market use a split connection method between the NTC and the fuse, which fails to provide sufficient creepage distance, leakage is likely to occur in high humidity or polluted environments, resulting in insufficient insulation performance. Therefore, this application proposes an internal and external split connection structure between the rice cooker NTC and the double fuse to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an internal and external separate connection structure for the NTC and double fuse in a rice cooker, which has advantages such as good insulation and solves the problem of leakage that is prone to occur in high humidity or polluted environments.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an inner and outer split connection structure for an electric rice cooker NTC and a double fuse, comprising an outer shell and an inner slider, wherein the outer shell and the inner slider are provided with the same connection mechanism;

[0006] The connecting mechanism includes a connecting part A and a connecting part B for connecting the outer shell and the inner slider, and the connecting part A and the connecting part B are respectively disposed on the outer shell and the inner slider;

[0007] The connecting part A includes a connecting cavity formed inside the outer shell. Limiting blocks are fixed on the inner walls of the left and right sides of the connecting cavity. Two limiting blocks are recessed inward along their opposite sides to form an arc-shaped groove A. Semi-annular grooves A are recessed inward at the four corners of the connecting cavity along the side away from the axis of the outer shell. Ring pieces A are fixed inside the four semi-annular grooves A and near the bottom surface of the outer shell. Abutting pieces are fixed on the front and rear sides of the limiting blocks.

[0008] The connecting part B includes side pieces fixed on the front and rear sides of the inner slider. Semi-annular grooves B are formed on both the left and right sides of the side pieces. A ring piece B is fixed inside the semi-annular grooves B and near the bottom surface of the inner slider. Line grooves are formed on the upper surfaces of the two side pieces and the inner slider. Arc-shaped grooves B located on the inner slider are formed on both the left and right sides of the middle line groove. Abutment grooves are formed on both the left and right sides of the inner slider.

[0009] Furthermore, the ring plate A and the ring plate B are fitted together and are coaxially arranged.

[0010] Furthermore, the arc-shaped groove A and the arc-shaped groove B are in a close fit to form a circle A, and the semi-annular groove A and the semi-annular groove B are in a close fit to form a circle B, and the circumference of circle A is smaller than the circumference of circle B.

[0011] Furthermore, the two abutting grooves on the inner slider are respectively in abutting state with the two abutting pieces.

[0012] Furthermore, both the left and right sides of the groove are arc-shaped.

[0013] Furthermore, the distance between the inner walls of the front and rear sides of the abutment groove increases sequentially from top to bottom.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] This rice cooker features a separate internal and external connection structure for the NTC and double fuse. The connection mechanism on the outer shell and inner slider, including components such as limit blocks, arc grooves, semi-annular grooves, and ring plates, provides sufficient creepage distance. This effectively prevents leakage even in high humidity or polluted environments, improving the insulation performance of the entire circuit system. This helps meet more stringent UL safety requirements and solves the problems of poor insulation and insufficient creepage distance in some left-right separate structures on the market. The entire installation process is convenient and efficient, simplifying the manufacturing process and reducing the risk of leakage. The complex assembly process may lead to potential damage risks. At the same time, by using a split snap-fit ​​structure instead of the traditional one-piece plastic structure, unnecessary plastic material usage is reduced. This helps to optimize the heat conduction path and improve the NTC's response speed and accuracy to temperature changes. This means that the rice cooker can more accurately monitor the internal temperature and adjust the heating power accordingly, ensuring cooking results while also improving safety. The dual fuse design ensures that when the current exceeds the specified value, the fuse can melt in time to cut off the circuit, providing double protection for the rice cooker and effectively avoiding equipment damage or safety accidents caused by overcurrent. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure after connection of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting part A of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting part B of this utility model.

[0020] In the figure: 1 Outer shell, 2 Inner slider, 3 Connecting mechanism, 31 Connecting part A, 3101 Connecting cavity, 3102 Limiting block, 3103 Arc groove A, 3104 Semi-annular groove A, 3105 Ring piece A, 3106 Abutting piece, 32 Connecting part B, 3201 Side piece, 3202 Semi-annular groove B, 3203 Ring piece B, 3204 Wire groove, 3205 Arc groove B, 3206 Abutting groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 4 The rice cooker NTC and double fuse in this embodiment are connected by separate inner and outer parts, including an outer shell 1 and an inner slider 2, and the same connecting mechanism 3 is provided on the outer shell 1 and the inner slider 2.

[0023] The connecting mechanism 3 includes a connecting part A31 and a connecting part B32 for connecting the outer shell 1 and the inner slider 2, and the connecting part A31 and the connecting part B32 are respectively disposed on the outer shell 1 and the inner slider 2. The connecting part A31 includes a connecting cavity 3101 formed inside the outer shell 1. Limiting blocks 3102 are fixed on the inner walls of the left and right sides of the connecting cavity 3101. The two limiting blocks 3102 are recessed inward along their opposite sides to form an arc-shaped groove A3103. At the four corners of the connecting cavity 3101, semi-annular grooves A3104 are recessed inward along the side away from the axis of the outer shell 1 and are located on the outer shell 1. Ring pieces A3105 are fixed inside the four semi-annular grooves A3104 and near the bottom surface of the outer shell 1. Abutment pieces 3106 located on the outer shell 1 are fixed on the front and rear sides of the limiting blocks 3102.

[0024] The connecting part B32 includes side pieces 3201 fixed on the front and rear sides of the inner slider 2. Semi-annular grooves B3202 are provided on both the left and right sides of the side pieces 3201. Annular pieces B3203 are fixed inside the semi-annular grooves B3202 and near the bottom surface of the inner slider 2. Line grooves 3204 are provided on the upper surface of the two side pieces 3201 and the inner slider 2. Arc-shaped grooves B3205 located on the inner slider 2 are provided on both the left and right sides of the middle line groove 3204. Abutment grooves 3206 are provided on both the left and right sides of the inner slider 2.

[0025] It should be noted that this connection structure, through the carefully designed connecting parts A31 and B32, achieves a tight fit and stable connection between the outer shell 1 and the inner slider 2. The connecting cavity 3101, limiting block 3102, arc groove A3103, semi-annular groove A3104, ring piece A3105, and abutment piece 3106 of the connecting part A31, together with the side piece 3201, semi-annular groove B3202, ring piece B3203, wire groove 3204, arc groove B3205, and abutment groove 3206 of the connecting part B32, not only provides sufficient creepage distance and enhances insulation performance, but also ensures the stability and reliability of the connection through multi-point limiting and abutment design. At the same time, the setting of wire groove 3204 and arc grooves A3103 and B3205 provides a reasonable wiring path for the wires, reduces the risk of messy and damaged wiring, and further improves the safety and service life of the product.

[0026] In this application, ring A3105 and ring B3203 are attached together and are coaxially arranged.

[0027] It should be noted that in this connection structure, the ring piece A3105 and the ring piece B3203 are fitted together and are coaxially arranged. This design further enhances the connection stability between the outer shell 1 and the inner slider 2. Through the fitting and coaxial arrangement of the ring pieces, it can be ensured that the two parts are precisely aligned during assembly, reducing loosening or misalignment caused by assembly errors. At the same time, this structure can also improve the mechanical strength and reliability of the overall connection, ensuring that the connection will not loosen or be damaged due to vibration or external force during long-term use, thereby extending the service life of the product and improving its safety.

[0028] In this application, the arc groove A3103 and the arc groove B3205 are in a close fit to form a circle A, and the semi-annular groove A3104 and the semi-annular groove B3202 are in a close fit to form a circle B, and the circumference of circle A is smaller than the circumference of circle B.

[0029] It should be noted that in this connection structure, the arc-shaped groove A3103 and the arc-shaped groove B3205 are in a close fit to form circle A, and the semi-annular groove A3104 and the semi-annular groove B3202 are in a close fit to form circle B. The circumference of circle A is smaller than the circumference of circle B, in order to accommodate the different thicknesses of the wires in the rice cooker NTC and the fuse.

[0030] In this application, the two abutting grooves 3206 on the inner slider 2 are in abutting state with the two abutting pieces 3106 respectively.

[0031] It should be noted that the abutting relationship between the abutting groove 3206 and the abutting piece 3106 provides an additional support point between the inner slider 2 and the outer shell 1. This multi-point support structure can effectively disperse the pressure at the connection point, reduce local stress concentration, and thus enhance the stability of the overall connection.

[0032] In this application, the left and right sides of the groove 3204 are both arc-shaped, and the distance between the inner walls of the front and rear sides of the abutment groove 3206 increases from top to bottom.

[0033] It should be noted that the contact relationship between the abutting groove 3206 and the abutting piece 3106 allows the force between the inner slider 2 and the outer shell 1 to be evenly distributed, avoiding wear caused by excessive local force. This uniform force design can effectively reduce wear between components and improve the durability of the product.

[0034] Meanwhile, the left and right sides of the cable tray 3204 are arc-shaped, which can better guide the direction of the wires or conductors, allowing them to bend naturally during wiring, reducing bending stress on the wires and thus extending their service life. In addition, the arc design provides more flexible wiring space for the wires, making installation and maintenance easier. The arc design can also reduce friction between the wires and the inner wall of the cable tray 3204, reducing the risk of damage to the wires due to long-term friction and further improving the reliability of the product.

[0035] The working principle of the above embodiment is as follows: two double fuses and NTC wires are laid and placed through three wire grooves 3204 respectively. Then, the connecting part A31 on the outer shell 1 is aligned with the connecting part B32 on the inner slider 2, ensuring that the limiting block 3102, arc groove A3103, semi-annular groove A3104 and ring piece A3105 in the connecting part A31 are aligned with the side piece 3201, semi-annular groove B3202, ring piece B3203 and arc groove B3205 in the connecting part B32. With precise alignment, the side piece 3201 of the inner slider 2 is inserted into the connecting cavity 3101 of the outer shell 1, ensuring that the ring piece A3105 and the ring piece B3203 are fitted together and coaxially arranged. The arc groove A3103 and the arc groove B3205 fit together to form circle A, and the semi-annular groove A3104 and the semi-annular groove B3202 fit together to form circle B. At this time, the abutting groove 3206 on the inner slider 2 abuts against the abutting piece 3106 on the outer shell 1, thus completing the rapid assembly of the rice cooker NTC and the double fuse.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A separate internal and external connection structure for an electric rice cooker NTC and a double fuse, comprising an outer shell (1) and an inner slider (2), characterized in that: The outer shell (1) and the inner slider (2) are provided with the same connecting mechanism (3); The connecting mechanism (3) includes a connecting part A (31) and a connecting part B (32) for connecting the outer shell (1) and the inner slider (2), and the connecting part A (31) and the connecting part B (32) are respectively disposed on the outer shell (1) and the inner slider (2); The connecting part A (31) includes a connecting cavity (3101) formed inside the outer shell (1). Limiting blocks (3102) are fixed on the inner walls of the left and right sides of the connecting cavity (3101). The two limiting blocks (3102) are recessed inward along their opposite sides to form an arc-shaped groove A (3103). At the four corners of the connecting cavity (3101), semi-annular grooves A (3104) located on the outer shell (1) are recessed inward along the side away from the axis of the outer shell (1). Ring pieces A (3105) are fixed inside the four semi-annular grooves A (3104) and near the bottom surface of the outer shell (1). Abutment pieces (3106) located on the outer shell (1) are fixed on the front and rear sides of the limiting blocks (3102). The connecting part B (32) includes side pieces (3201) fixed on the front and rear sides of the inner slider (2). Semi-annular grooves B (3202) are provided on both the left and right sides of the side pieces (3201). A ring piece B (3203) is fixed inside the semi-annular grooves B (3202) and near the bottom surface of the inner slider (2). A wire groove (3204) is provided on the upper surface of both side pieces (3201) and the inner slider (2). An arc-shaped groove B (3205) located on the inner slider (2) is provided on both the left and right sides of the wire groove (3204) in the middle. An abutment groove (3206) is provided on both the left and right sides of the inner slider (2).

2. The internal and external separate connection structure of the NTC and double fuse in a rice cooker according to claim 1, characterized in that: The ring plate A (3105) and the ring plate B (3203) are fitted together and are coaxially arranged.

3. The internal and external separate connection structure of the NTC and double fuse in a rice cooker according to claim 1, characterized in that: The arc-shaped groove A (3103) and the arc-shaped groove B (3205) are in a close fit to form a circle A, and the semi-annular groove A (3104) and the semi-annular groove B (3202) are in a close fit to form a circle B, and the circumference of circle A is smaller than the circumference of circle B.

4. The internal and external separate connection structure of the NTC and double fuse in a rice cooker according to claim 1, characterized in that: The two abutting grooves (3206) on the inner slider (2) are in abutting state with the two abutting pieces (3106) respectively.

5. The internal and external separate connection structure of the NTC and double fuse in a rice cooker according to claim 1, characterized in that: The left and right sides of the groove (3204) are both arc-shaped.

6. The internal and external separate connection structure of the NTC and double fuse in a rice cooker according to claim 1, characterized in that: The distance between the inner walls of the front and rear sides of the abutment groove (3206) increases from top to bottom.

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