Electrical connector lower housing

Abstract

This solution provides a lower connector housing, including an insulating lower housing shell, a central positioning post, an annular groove, and a first charged elastic spring. A first mounting groove, communicating with the annular groove and used to mount the first charged elastic spring, is formed on the outer wall of the central positioning post. The distance between the inner wall of the first mounting groove and the rear back surface of the first charged elastic spring's active part is always greater than the maximum electrode creepage clearance. That is, when the active part of the first charged elastic spring is electrically connected with the upper connector housing, the rear back surface of the first charged elastic spring's active part is far from the inner wall of the first mounting groove, and the distance between the rear back surface of the first charged elastic spring's active part and the inner wall of the first mounting groove is greater than or equal to the maximum electrode creepage clearance. By creating a recessed clearance space in the first mounting groove on the outer wall of the central positioning post, the first charged elastic spring is provided with deformation space during coupling, and the overall volume of the lower connector housing is further reduced while considering creepage distance.

Description

Technical Field

[0001] This utility model relates to a connector for electric teaware appliances, and more particularly to a connector base for an electric heater. Background Technology

[0002] Existing connectors for electric heaters generally include an upper connector and a lower connector. The lower connector includes a central positioning post and several concentric isolation rings on its outer shell. An annular groove is formed between the central positioning post and the smallest diameter isolation ring, and between adjacent isolation rings, for mounting electrode / signal elastic springs. The electrode / signal elastic springs are positioned within the annular groove by hooking onto the isolation rings with their own side lugs. To achieve the national standard for electrode safety distance and avoid safety hazards, the spacing between the isolation rings must be sufficiently large, thus preventing the miniaturization of the connector. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a safe connector base that can achieve extreme miniaturization.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a lower seat for an electrical connector, the lower seat for the electrical connector comprising an insulating lower seat shell, the lower seat shell being respectively provided with a central positioning post and concentrically arranged isolation ring ribs, an annular groove for mounting electrode / signal elastic springs being formed between the central positioning post and the isolation ring ribs, the electrode / signal elastic springs including a first charged elastic spring connected to an external power source, the first charged elastic spring having a first contact point facing the annular groove on its active part that is electrically connected to the upper seat of the electrical connector, the outer wall of the central positioning post having a first mounting groove communicating with the annular groove and used for mounting the first charged elastic spring, the distance between the inner wall of the first mounting groove and the rear back surface of the active part of the first charged elastic spring is always greater than the maximum electrode creepage gap, that is, when the active part of the first charged elastic spring is electrically connected to the upper seat of the electrical connector, the rear back surface of the active part of the first charged elastic spring is far away from the inner wall of the first mounting groove, and the distance between the rear back surface of the active part of the first charged elastic spring and the inner wall of the first mounting groove is greater than or equal to the maximum electrode creepage gap.

[0005] As an improvement: the electrode / signal elastic spring further includes a second charged elastic spring connected to an external power source. The active part of the second charged elastic spring, which is electrically connected to the upper seat of the electrical connector, has a second contact facing the annular groove. The inner wall of the isolation ring rib has a second mounting groove that communicates with the annular groove and is used to install the second charged elastic spring. The distance between the inner wall of the second mounting groove and the rear back surface of the active part of the first charged elastic spring is always greater than the maximum electrode creepage gap. That is, when the active part of the first charged elastic spring is electrically connected to the upper seat of the electrical connector, the rear back surface of the active part of the second charged elastic spring is far away from the inner wall of the second mounting groove, and the distance between the rear back surface of the active part of the second charged elastic spring and the inner wall of the second mounting groove is greater than or equal to the maximum electrode creepage gap.

[0006] As an improvement, the first and second charged elastic springs are arranged at an angle and far apart within the annular groove.

[0007] As an improvement: the lower housing is provided with a plurality of isolation ring ribs, and the annular groove for mounting electrode / signal elastic springs includes a first annular groove formed between the central positioning post and the smallest diameter isolation ring rib, and a second annular groove formed between adjacent isolation ring ribs. The first charged elastic spring and the second charged elastic spring are respectively installed in the first annular groove and the second annular groove.

[0008] As an improvement: the central positioning post has a double-layer ring wall structure, and the first mounting groove is formed on the outer ring wall of the central positioning post.

[0009] As an improvement, the first mounting groove on the outer wall of the central positioning post is a recessed clearance space formed by local thickening.

[0010] As an improvement, the first charged elastic spring is either an anode elastic spring or a cathode elastic spring.

[0011] This utility model employs a recessed clearance space, namely the first mounting groove, on the outer wall of the central positioning post. This not only provides deformation space for the first charged elastic spring during coupling, but also further compresses the overall volume of the connector base while taking into account the creepage distance. It breaks the constraint of the corresponding isolation ring rib for the charged elastic spring, and electrical coupling can be achieved with only a single annular groove, ensuring coupling stability and breaking the constraint of miniaturization limits of traditional connectors.

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one embodiment of the lower socket of the electrical connector of this utility model.

[0014] Figure 2 for Figure 1 A schematic diagram of the bottom structure.

[0015] Figure 3 for Figure 1 A schematic diagram of the explosion structure.

[0016] Figure 4 for Figure 1 A cross-sectional view of the coupling state between the lower and upper portions of the electrical connector. Detailed Implementation

[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 The illustration shows one embodiment of the lower connector of this utility model. The lower connector includes an insulating lower connector shell 1. The lower connector shell 1 is respectively provided with a central positioning post 2 and an isolation ring rib 4 arranged concentrically. An annular groove 3 is formed between the central positioning post 2 and the isolation ring rib for installing electrode / signal elastic springs. This embodiment features a minimally sized single annular groove design. A grounding spring 9 is installed in the central hole of the central positioning post 2. The electrode / signal elastic springs include a first charged elastic spring 5 connected to an external power supply as an anode elastic spring and a second charged elastic spring 6 connected to an external power supply as a cathode elastic spring. The first charged elastic spring 5, which is electrically connected to the upper part of the electrical connector, has a first contact 52a facing outwards from the annular groove. The second charged elastic spring 6, which is also electrically connected to the upper part of the electrical connector, has a second contact 62a facing inwards from the annular groove. Within the annular groove 3, the first charged elastic spring 5 and the second charged elastic spring 6 are arranged with different diameters and are far apart. That is, the working parts of the first charged elastic spring 5 and the second charged elastic spring 6 are located on the inner and outer diameter circles of the annular groove, respectively, and are angularly separated. In this embodiment, they are arranged at a 90-degree angle. The anode elastic spring, cathode elastic spring, and grounding spring are arranged in a right-angled triangle, thus providing more drainage space on the other side of the triangular arrangement of the electrical connector.

[0018] In this embodiment, the outer wall of the central positioning post 2 has a first mounting groove 2a that communicates with the annular groove 3 and is used to install the first charged elastic spring. The distance between the inner wall of the first mounting groove 2a and the rear back surface of the first charged elastic spring 5 is always greater than the maximum electrode creepage gap. That is, when the first charged elastic spring 5 is electrically connected with the upper seat of the electrical connector, the rear back surface of the first charged elastic spring 5 is far away from the inner wall of the first mounting groove. Furthermore, the distances between the top of the free end of the first charged elastic spring 5 and the top wall of the first mounting groove, between the two sides of the first charged elastic spring 5 and the two side walls of the first mounting groove, and between the rear back surface of the first charged elastic spring 5 and the inner wall of the first mounting groove are all greater than or equal to the maximum electrode creepage gap. In this embodiment, the central positioning post 2 has a double-layer annular wall structure. The first mounting groove 2a is formed on the outer annular wall of the central positioning post. Of course, the first mounting groove 2a can also be a recessed clearance space formed by local thickening on the outer wall of the central positioning post. Compared to the precision requirements of thickness reduction designs, the double-layer ring wall design in this embodiment is more conducive to hollow design without affecting the integrity of the inner wall partition, and is also easier to process and less expensive. The first mounting groove provides deformation space for the first charged elastic spring during coupling, and further compresses the overall volume of the connector base while taking into account the creepage distance, breaking the constraints of miniaturization limits for connector bases.

[0019] In this embodiment, a second mounting groove 4a is formed on the inner wall of the isolation ring rib 4, which communicates with the annular groove 3 and is used to install the second charged elastic spring 6. The distance between the inner wall of the second mounting groove 4a and the rear back surface of the first charged elastic spring 5 is always greater than the maximum electrode creepage gap. That is, when the first charged elastic spring 5 is electrically connected with the upper seat of the electrical connector, the rear back surface of the second charged elastic spring 6 is far away from the inner wall of the second mounting groove 4a. Furthermore, the distances between the top of the free end of the second charged elastic spring 6 and the top wall of the second mounting groove 4a, between the two sides of the second charged elastic spring 6 and the two side walls of the second mounting groove 4a, and between the rear back surface of the second charged elastic spring 6 and the inner wall of the second mounting groove 4a are all greater than or equal to the maximum electrode creepage gap. This facilitates the extreme miniaturization of the connector. Moreover, the top and left and right parts of the charged spring are not limited, and the gap between them and the mounting insulating housing is not less than the maximum electrode creepage gap. Therefore, when calculating the creepage distance, the calculation is performed along the inner walls of the first and second mounting grooves respectively, effectively avoiding potential safety hazards.

[0020] Of course, if the lower part of the electrical connector has a multi-isolation ring design, in order to increase the isolation distance, the second charged elastic spring 6 can also be placed in the second annular groove formed between adjacent pairs of isolation rings. That is, the lower part housing 1 is provided with several isolation rings 4, and the annular groove for mounting electrode / signal elastic springs includes a first annular groove formed between the central positioning post 2 and the smallest diameter isolation ring, and a second annular groove formed between adjacent pairs of isolation rings. The first charged elastic spring 5 and the second charged elastic spring 6 are respectively installed in the first annular groove and the second annular groove.

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

Claims

1. A lower socket for an electrical connector, characterized in that: The lower connector housing includes an insulating lower housing shell (1). The lower housing shell (1) is provided with a central positioning post (2) and concentrically arranged isolation ring ribs (4). An annular groove (3) for mounting electrode / signal elastic springs is formed between the central positioning post (2) and the isolation ring ribs. The electrode / signal elastic springs include a first charged elastic spring (5) connected to an external power source. The first charged elastic spring (5) has a first contact (52a) facing the annular groove on its working part, which is electrically connected to the upper connector housing. An opening is made on the outer wall of the central positioning post (2). There is a first mounting groove (2a) that communicates with the annular groove (3) and is used to install the first charged elastic spring. The distance between the inner wall of the first mounting groove (2a) and the back surface of the first charged elastic spring (5) is always greater than the maximum electrode creepage gap. That is, when the first charged elastic spring (5) is electrically connected with the upper seat of the electrical connector, the back surface of the first charged elastic spring (5) is far away from the inner wall of the first mounting groove (2a), and the distance between the back surface of the first charged elastic spring (5) and the inner wall of the first mounting groove (2a) is greater than or equal to the maximum electrode creepage gap.

2. The lower socket of the electrical connector according to claim 1, characterized in that: The electrode / signal elastic spring also includes a second charged elastic spring (6) connected to an external power source. The second charged elastic spring (6) has a second contact (62a) facing the annular groove on its working part, which is electrically connected to the upper seat of the electrical connector. The inner wall of the isolation ring rib (4) has a second mounting groove (4a) that communicates with the annular groove (3) and is used to install the second charged elastic spring (6). The distance between the inner wall of the second mounting groove (4a) and the back side of the working part of the first charged elastic spring (5) is always greater than the maximum electrode creepage gap. That is, when the working part of the first charged elastic spring (5) is electrically connected to the upper seat of the electrical connector, the back side of the working part of the second charged elastic spring (6) is far away from the inner wall of the second mounting groove (4a), and the distance between the back side of the working part of the second charged elastic spring (6) and the inner wall of the second mounting groove (4a) is greater than or equal to the maximum electrode creepage gap.

3. The lower socket of the electrical connector according to claim 2, characterized in that: The first charged elastic spring (5) and the second charged elastic spring (6) are arranged at an angle and far apart within the annular groove.

4. The lower socket of the electrical connector according to claim 2, characterized in that: The lower housing (1) is provided with a plurality of isolation ring ribs (4). The annular groove for mounting electrode / signal elastic springs includes a first annular groove formed between the central positioning post (2) and the smallest diameter isolation ring rib, and a second annular groove formed between adjacent isolation ring ribs. The first charged elastic spring (5) and the second charged elastic spring (6) are respectively installed in the first annular groove and the second annular groove.

5. The lower socket of the electrical connector according to claim 1, 2, 3, or 4, characterized in that: The central positioning post (2) has a double-layer ring wall structure, and the first mounting groove (2a) is formed on the outer ring wall of the central positioning post.

6. The lower socket of the electrical connector according to claim 1, 2, 3, or 4, characterized in that: The first mounting groove (2a) is a recessed clearance space formed by local thickening on the outer wall of the central positioning post.

7. The lower socket of the electrical connector according to claim 1, 2, 3, or 4, characterized in that: The first charged elastic spring (5) is an anode elastic spring or a cathode elastic spring.

8. The lower socket of the electrical connector according to claim 5, characterized in that: The first charged elastic spring (5) is an anode elastic spring or a cathode elastic spring.

9. The lower socket of the electrical connector according to claim 6, characterized in that: The first charged elastic spring (5) is an anode elastic spring or a cathode elastic spring.

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