Power Female Connector

Abstract

The utility model discloses a power female connector, which includes a plastic body, a slot with an opening facing upward and a central guide column located at the center of the slot; a first electrode terminal, which has an annular body, the annular body embraces the central guide column and its outer peripheral surface is exposed to form a first functional contact area; a second electrode terminal, which has a convex column, the convex column is vertically arranged in the central guide column and its top is exposed at the top of the central guide column to form a second functional contact area; a grounding terminal, which has a pair of elastic terminal parts, and the elastic contact parts of the elastic terminal parts extend laterally into the slot to form a third functional contact area. The utility model helps to realize the miniaturization design of the connector and improve product safety and product quality.

Description

[Technical field]

[0001] The utility model belongs to the technical field of connectors, and in particular relates to a power female connector. [Background technology]

[0002] The power connector is an indispensable electrical component for power transmission. It generally includes a female end and a male end, and the electrical connection is achieved through the contact of metal terminals. The power connector generally includes a positive terminal and a negative terminal. In addition to the basic positive and negative terminals, some power connectors also have a ground terminal to meet higher safety performance requirements.

[0003] Patent CN204088623U in the prior art discloses a radio frequency connector, which includes a ground terminal having an annular body, an edge of a bottom end of the annular body having a plurality of ground terminal fixing plates protruding outward in the radial direction of the annular body; a signal terminal, which is arranged at the center of the annular body and has a column, a bottom of the column having a signal terminal fixing plate protruding outward in the radial direction of the column; and an insulating base, which is used to cover and fix the ground terminal and the signal terminal; an opening adjacent to the bottom end is provided on a circumferential surface of the annular body, and the opening is located above the signal terminal fixing plate. The manufacturing method of the radio frequency connector is to arrange the columnar signal terminal at the center of the annular ground terminal, fix the two in an injection molding mold, and form an insulating base through plastic injection molding, so as to fix the ground terminal and the signal terminal together to form a radio frequency connector.

[0004] There are only two terminals in the above-mentioned RF connector, while there is currently a power connector, which includes a positive terminal, a negative terminal and a ground terminal, and adopts an annular slot form to realize the plug-in of the female end and the male end as required. Multiple metal terminals need to be stacked up and down and molded in a plastic insulator. During the molding process, it is difficult for each terminal to obtain effective and comprehensive support in the mold, and there is a greater risk of being deformed by punching, which affects the electrical conductivity contact surface of the terminal or produces burrs, resulting in defects or problems in the function of the power connector.

[0005] Patent CN114665537A in the prior art discloses a hard-wired connector, a charging and swapping power supply, and a charging power supply system, which includes three coaxially arranged annular electrode terminals, and the contact surfaces for electrical conduction are all arranged on the upper end surfaces of the annular electronic terminals. On the one hand, the coaxial annular distribution increases the overall size of the connector. On the other hand, the exposed electrical contact surface is easily touched by mistake and conducts the positive and negative poles, posing a great safety hazard.

[0006] Therefore, it is necessary to provide a new power female connector to solve the above technical problems. [Contents of the utility model]

[0007] The main purpose of the utility model is to provide a power female connector, which helps to achieve a miniaturized design of the connector and improve product safety and product quality.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions: a power female connector, comprising:

[0009] A plastic body having a slot opening upward and a central guide post located at the center of the slot;

[0010] A first electrode terminal having an annular body, the annular body encircling the central guide pillar and having an outer peripheral surface exposed to form a first functional contact area;

[0011] The second electrode terminal has a convex column, the convex column is vertically arranged in the central guide column and the top of the convex column is exposed at the top of the central guide column to form a second functional contact area;

[0012] The grounding terminal has a pair of elastic terminal parts, and the elastic contact parts of the elastic terminal parts extend laterally into the slot to form a third functional contact area.

[0013] Furthermore, the gap space between the convex column and the annular body is filled with the rubber material of the plastic body to form the central guide column.

[0014] Furthermore, the first electrode terminal includes a first disc portion extending horizontally and radially outward from the outer periphery of the bottom of the annular body and a first welding portion extending outward from the edge of the first disc portion; the first disc portion is arranged in the plastic body, and the first welding portion extends out of the plastic body.

[0015] Furthermore, the second electrode terminal includes a second disc portion extending horizontally and radially outward from the outer periphery of the bottom of the convex column and a second welding portion extending outward from the edge of the second disc portion; the second disc portion is arranged in the plastic body and is located below the first disc portion, and the second welding portion extends out of the plastic body.

[0016] Furthermore, the plastic body includes a first plastic part that is injection molded with the first electrode terminal to form a first component and a second plastic part that is injection molded with the first component to form a second component; the ground terminal is plugged and assembled with the second component.

[0017] Furthermore, the first plastic part is a flat plate structure, the first disc portion is embedded and molded in the first plastic part, the annular body extends upward from the upper surface of the first plastic part and is located at the center of the first plastic part; the second plastic part covers the outer periphery of the first plastic part, and a fence surrounding the annular body is formed on the upper surface of the first plastic part, and the fence surrounds the gap space of the annular body to form the slot; the gap space between the convex column and the annular body is filled with the rubber material of the second plastic part.

[0018] Furthermore, a positioning avoidance groove exposing a partial area of ​​the first disc portion and a receiving groove including the positioning avoidance groove are formed on the lower surface of the first plastic part; the positioning avoidance groove continues to extend upward from the bottom of the receiving groove to the lower surface of the first disc portion, and is connected with the center hole of the annular body; a plurality of first limiting support blocks are formed at the bottom of the receiving groove, and the first limiting support block is located between the first disc portion and the second disc portion; the first limiting support block is attached to the upper surface of the second disc portion to achieve height limitation; the first plastic part also has a second limiting support block extending into the receiving groove, a support step is provided at the end of the second limiting support block, and a positioning edge is formed on the second disc portion for limiting the position with the support step.

[0019] Furthermore, the grounding terminal has an overall U-shaped structure and also includes a connecting portion, and the pair of elastic terminal portions are symmetrically arranged at the two lateral ends of the connecting portion; movable mounting grooves are arranged on the left and right sides of the second plastic part; the movable mounting groove is an open opening structure on the side facing the outside of the second plastic part, and a through opening connected to the slot is formed on the side facing the inside of the second plastic part; the connecting portion is arranged closely against the front surface of the second plastic part, and the left and right two elastic terminal portions are respectively assembled and extended into the movable mounting groove, and the elastic contact portion of the elastic terminal portion extends into the slot through the through opening.

[0020] Furthermore, a plurality of limit assembly grooves are arranged on the front side surface of the second plastic part, and a plurality of limit inserts are arranged on the upper edge and the lower edge of the connecting part to be horizontally inserted into the limit assembly grooves, and barbed protrusions are arranged on both side edges of the limit inserts to prevent retreat by interfering with the groove wall of the limit assembly groove.

[0021] Furthermore, the grounding terminal also includes a third welding portion, which is bent downward from the lower edge of the middle portion of the connecting portion and then extended horizontally forward; the first welding portion, the second welding portion and the third welding portion are arranged to extend out from the front side surface of the second component.

[0022] Compared with the prior art, the beneficial effects of the power female connector of the utility model are: a center guide column structure is used in the slot to integrate the functional contact areas of the positive and negative terminals, which is conducive to the miniaturization design of the connector; the circumferential surface of the center guide column is used as the contact surface of one of the electrode terminals, and the top end surface of the center guide column is used as the contact surface of the other electrode terminal, thereby reducing the risk of touching the conductive material; the positive and negative terminals adopt a secondary buried injection molding process, the grounding terminal adopts an elastic terminal structure, and the assembly is achieved by plug-in assembly, thereby reducing the difficulty of the connector molding process; by cleverly designing the first plastic part structure of the first injection molding, the position stability of the first electrode terminal and the second electrode terminal during the two injection molding processes and the retention of the terminal structure are guaranteed, which can effectively prevent the electrode terminals from being deformed by punching, thereby improving the product quality; in addition, by cleverly designing the second plastic part structure of the second injection molding, a positioning and fastening basis is provided for the plug-in assembly of the grounding terminal, thereby improving the overall structural property and strength of the product.

Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the molding process flow of an embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the exploded structure of the first component and the second electrode terminal in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of an exploded structure in which the first component and the second electrode terminal are inverted in an embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of an inverted structure of the first component and the second electrode terminal assembled in an embodiment of the utility model;

[0028] Figure 6 It is a schematic diagram of the horizontal cross-section structure of an embodiment of the utility model;

[0029] The numbers in the figure represent:

[0030] 100-power female connector;

[0031] 10-first component; 20-second component;

[0032] 1-plastic body, 11-first plastic part, 111-positioning avoidance groove, 112-accommodating groove, 113-first limiting support block, 114-second limiting support block, 115-supporting step, 116-avoidance groove, 12-second plastic part, 121-movable placement groove, 122-through opening, 123-limiting assembly groove, 124-blocking limiting surface, 13-slot, 14-center guide column;

[0033] 2-first electrode terminal, 21-annular body, 22-first disc portion, 23-first welding portion;

[0034] 3-second electrode terminal, 31-convex column, 32-second disc portion, 33-second welding portion, 34-positioning edge;

[0035] 4-ground terminal, 41-connecting portion, 42-elastic terminal portion, 421-elastic contact portion, 422-elastic arm, 423-free end arm, 43-third welding portion, 44-limiting plug. [Specific implementation method]

[0036] Embodiment 1:

[0037] Please refer to Figure 1-Figure 6 This embodiment is a power female connector 100 , which includes a plastic body 1 , a first electrode terminal 2 , a second electrode terminal 3 and a ground terminal 4 .

[0038] The plastic body 1 is provided with a slot 13 with an upward opening and a central guide post 14 arranged at the center of the slot 13. The slot 13 is used to be plugged with a power male connector to achieve electrical conduction. The slot 13 can be set to be circular, square, polygonal or other geometric shapes.

[0039] The first electrode terminal 2 includes an annular body 21 , a first disc portion 22 extending horizontally and radially outwardly from the bottom periphery of the annular body 21 , and a first welding portion 23 extending outwardly from the edge of the first disc portion 22 .

[0040] The second electrode terminal 3 includes a convex column 31 extending into the annular body 21 , a second disc portion 32 extending horizontally and radially outwardly from the bottom periphery of the convex column 31 , and a second welding portion 33 extending outwardly from the edge of the second disc portion 32 .

[0041] The ground terminal 4 includes a connecting portion 41 , arc-shaped elastic terminal portions 42 symmetrically arranged at two lateral ends of the connecting portion 41 , and a third welding portion 43 .

[0042] The first electrode terminal 2 , the second electrode terminal 3 and the ground terminal 4 are all integrally structured.

[0043] The annular body 21 embraces the central guide column 14 and its outer peripheral surface is exposed to the outside to form a first functional contact area. The convex column 31 is vertically buried in the central guide column 14 and its top is exposed to the top of the central guide column 14 to form a second functional contact area. The gap space between the convex column 31 and the annular body 21 is filled with the rubber of the plastic body 1 to form the central guide column 14. The first electrode terminal 2 and the second electrode terminal 3, one of which is a positive electrode and the other is a positive electrode. The annular body 21, the convex column 31 and the central guide column 14 together form a central conductor structure in the slot 13, and the central conductor structure is responsible for the electrical conduction of the positive and negative electrodes. The elastic contact portion 421 of the elastic terminal portion 42 extends laterally into the slot 13 to form a third functional contact area.

[0044] The first disc portion 22 and the second disc portion 32 are disposed in the plastic body 1, and the first disc portion 22 is located below the second disc portion 32. The first welding portion 23, the second welding portion 33 and the third welding portion 43 all extend out of the plastic body 1.

[0045] In this embodiment, the annular body 21 of the first electrode terminal 2 is arranged at the center of the slot 13, and its outer peripheral surface is used as the functional contact surface for electrical conduction; at the same time, the convex column 31 of the second electrode terminal 3 is arranged in the annular body 21, and its top is used as the functional contact surface for electrical conduction; the gap between the annular body 21 and the convex column 31 is filled with glue to insulate the two electrode terminals, forming a central guide column structure, and the circumferential surface and the top end surface of the central guide column structure are used to respectively realize the electrode arrangement of the positive and negative poles; on the one hand, compared with the original arrangement of multiple annular hole groove structures, the overall diameter of the connector can be reduced, which is helpful to realize miniaturized design; on the other hand, compared with the original structure in which multiple electrodes are coaxially arranged in an annular shape, all the functional contact areas are arranged on the top of the annular terminal, and the risk of users accidentally touching and getting electric shock is greatly reduced.

[0046] In order to ensure product quality and prevent the first electrode terminal 2 and the second electrode terminal 3 from being deformed or displaced during the injection molding process, the present embodiment optimizes the manufacturing process of the power female connector 100, which specifically includes the following steps:

[0047] S1. One-step IM (Insert molding): Provide a first electrode terminal 2, put it into a first injection mold, and obtain a first component 10 by injection molding. The first component 10 includes a first electrode terminal 2 and a first plastic part 11; the first plastic part 11 is a flat plate structure; the first disc portion 22 of the first electrode terminal 2 is embedded in the flat plate material thickness of the first plastic part 11, and the annular body 21 extends upward from the upper surface of the first plastic part 11 and is located at the center of the first plastic part 11.

[0048] In order to prevent the first electrode terminal 2 from being deformed and ensure that the first electrode terminal 2 is positioned reliably and accurately in the first plastic part 11 , a positioning avoidance groove 111 exposing a portion of the first disc portion 22 is formed on the lower surface of the first plastic part 11 .

[0049] During injection molding, the first electrode terminal 2 is placed in the first injection mold, and a center positioning column that can be inserted into the annular body 21 and a positioning support structure that is shaped like the positioning avoidance groove 111 are set in the lower mold core of the first injection mold. A positioning ring groove that matches the annular body 21 can be set in the upper mold core. When the first electrode terminal 2 is placed, the center positioning column is used to extend into the annular body 21 to achieve center position positioning, and the positioning support structure is used to support the first disc part 22 to maintain the height position of the first electrode terminal 2 in the molding cavity, and at the same time, the bottom support is provided for the first disc part 22 to prevent it from being deformed by punching; after the mold is closed, the annular body 21 extends into the positioning ring groove, and the groove depth of the positioning ring groove is used to press down the top of the annular body 21, thereby ensuring that the position of the first electrode terminal 2 in the molding cavity is accurate and reliable. During demolding, the positioning support structure can also be used to move upward to eject the first component 10 from the first injection mold to achieve demolding.

[0050] S2, secondary IM molding: provide a second electrode terminal 3, put the second electrode terminal 3 and the first component 10 together into a second injection mold, and obtain a second component 20 by injection molding. The second component 20 includes the first component 10, the second electrode terminal 3 and the second plastic part 12. The first plastic part 11 and the second plastic part 12 together constitute the plastic body 1. The lower surface of the second disc portion 32 in the second electrode terminal 3 is exposed on the lower surface of the second component 20. The second plastic part 12 covers the outer periphery of the first plastic part 11, and a fence around the annular body 21 is formed on the upper surface of the first plastic part 11, and the gap space around the annular body 21 is formed by the fence to form the slot 13. The gap space between the convex column 31 and the annular body 21 is filled with the rubber material of the second plastic part 12.

[0051] In order to prevent the second electrode terminal 3 from being deformed by punching and to ensure that the position of the second electrode terminal 3 in the second plastic part 12 is reliable and accurate, a positioning structure for assisting in positioning the second electrode terminal 3 is further provided on the lower surface of the first plastic part 11. The positioning structure includes an accommodating groove 112 including the positioning avoidance groove 111. The positioning avoidance groove 111 continues to extend upward from the bottom of the accommodating groove 112 to the lower surface of the first disc portion 22 and is connected to the center hole of the annular body 21. The bottom of the receiving groove 112 is formed with a plurality of first limiting support blocks 113, which are attached to the upper surface of the second disc portion 32 in the second electrode terminal 3 to achieve height limiting, and the first limiting support block 113 is located between the first disc portion 22 and the second disc portion 32; the positioning structure also includes a second limiting support block 114 extending into the receiving groove 112, and a support step 115 is provided at the end of the second limiting support block 114, and a positioning edge 34 is formed on the second disc portion 32 to cooperate with the support step 115 to limit the position, and the cooperation of the positioning edge 34 and the support step 115 realizes positioning in one dimension. The lower surface of the first plastic part 11 is also provided with an avoidance groove 116 for the second welding part 33 to extend out of the first plastic part 11. The positioning edge 34 can adopt a straight line, a curve or an arc profile, and can be contoured with the support step 115 to achieve positioning.

[0052] During injection molding, the second electrode terminal 3 is first placed in the receiving groove 112 in the first component 10, the convex column 31 extends into the annular body 21, the second disc portion 32 is close to the surface of the first limiting support block 113, and the second welding portion 33 extends out of the first component 10 through the avoidance groove 116, and the support step 115 cooperates with the positioning edge 34 to achieve the horizontal one-dimensional freedom limitation; then the second electrode terminal 2 and the first component 10 are placed together in the second injection mold, and a central positioning column that cooperates with the convex column 31 and a platform support that supports the second disc portion 32 can be set in the lower mold core of the second injection mold. The center positioning column is extended into the convex hull column 31 to achieve center positioning, and the platform support surface is used to achieve height positioning of the second disc portion 32, which effectively prevents the second electrode terminal 3 from being deformed by punching, and at the same time ensures that the position of the second electrode terminal 3 in the molding cavity is stable and reliable; a positioning and holding structure that presses the upper surface of the first plastic part 11 and holds the outer periphery of the annular body 21 can be set in the upper mold core of the second injection mold. After the mold is closed, the positioning and holding structure is used to press the first plastic part 11 downward and hold the annular body 21, thereby ensuring that the positions of the first component 10 and the second electrode terminal 3 in the molding cavity are accurate and reliable.

[0053] S3. Provide a ground terminal 4, and insert the ground terminal 4 into the second component 20 to obtain a power female connector 100.

[0054] The left and right sides of the second plastic part 12 are formed with movable placement grooves 121 for the grounding terminal 4 to be elastically movable. The grounding terminal 4 is a U-shaped structure as a whole, and its connecting portion 41 is arranged close to the front surface of the second plastic part 12, and the left and right elastic terminal portions 42 are respectively assembled and extended into the movable placement groove 121. The movable placement groove 121 is an open opening structure on the side facing the outside of the second plastic part 12, and a through-hole 122 connected to the slot 13 is formed on the side facing the inside of the second plastic part 12. The two elastic terminal portions 42 in the grounding terminal 4 are respectively placed in the two movable placement grooves 121, and the elastic contact portion 421 of the elastic terminal portion 42 extends into the slot 13 through the through-hole 122.

[0055] In order to improve the assembly firmness of the ground terminal 4 and the second component 20, a plurality of limit assembly grooves 123 are further provided on the front side surface of the second plastic part 12, and a plurality of limit inserts 44 are horizontally inserted into the limit assembly grooves 123 on the upper and lower edges of the connecting portion 41, and barbed protrusions (not marked in the figure) are provided on both side edges of the limit inserts 44 to prevent retreat by interfering with the groove wall of the limit assembly groove 123. The third welding portion 43 is formed by bending downward from the middle lower edge of the connecting portion 41 and then extending forward horizontally.

[0056] The elastic terminal portion 42 is formed with an elastic arm 422 on one side of the elastic contact portion 421 close to the connecting portion 41, and a free end arm 423 is formed on one side of the elastic contact portion 421 close to the free end, and a blocking limit surface 124 is provided on the groove wall of the movable placement groove 121 to abut against the free end arm 423 to limit the extent to which the elastic contact portion 421 extends into the slot 13. The movable placement groove 121 provides a movable space for the elastic deformation of the elastic terminal portion 42.

[0057] The first welding portion 23 , the second welding portion 33 and the third welding portion 43 are arranged and protrude from the front surface of the second component 20 .

[0058] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A power female connector, characterized in that: It includes A plastic body having a slot opening upward and a central guide post located at the center of the slot; A first electrode terminal having an annular body, the annular body encircling the central guide pillar and having an outer peripheral surface exposed to form a first functional contact area; The second electrode terminal has a convex column, the convex column is vertically arranged in the central guide column and the top of the convex column is exposed at the top of the central guide column to form a second functional contact area; The grounding terminal has a pair of elastic terminal parts, and the elastic contact parts of the elastic terminal parts extend laterally into the slot to form a third functional contact area.

2. The power female connector according to claim 1, characterized in that: The gap space between the convex column and the annular body is filled with the rubber material of the plastic body to form the central guide column.

3. The power female connector according to claim 1, characterized in that: The first electrode terminal includes a first disc portion extending horizontally and radially outward from the outer periphery of the bottom of the annular body and a first welding portion extending outward from the edge of the first disc portion; the first disc portion is arranged in the plastic body, and the first welding portion extends out of the plastic body.

4. The power female connector according to claim 3, characterized in that: The second electrode terminal includes a second disc portion extending horizontally and radially outward from the outer periphery of the bottom of the convex column and a second welding portion extending outward from the edge of the second disc portion; the second disc portion is arranged in the plastic body and is located below the first disc portion, and the second welding portion extends out of the plastic body.

5. The power female connector according to claim 4, characterized in that: The plastic body comprises a first plastic part which is injection-molded with the first electrode terminal to form a first component and a second plastic part which is injection-molded with the first component to form a second component; the ground terminal is plug-assembled with the second component.

6. The power female connector according to claim 5, characterized in that: The first plastic part is a flat plate structure, the first disc part is embedded and molded in the first plastic part, the annular body extends upward from the upper surface of the first plastic part and is located at the center of the first plastic part; the second plastic part covers the outer periphery of the first plastic part, and a fence surrounding the annular body is formed on the upper surface of the first plastic part, and the gap space between the convex hull column and the annular body forms the slot; the gap space between the convex hull column and the annular body is filled with the rubber material of the second plastic part.

7. The power female connector according to claim 5 or 6, characterized in that: A positioning avoidance groove exposing a partial area of ​​the first disc portion and a receiving groove including the positioning avoidance groove are formed on the lower surface of the first plastic part; the positioning avoidance groove continues to extend upward from the bottom of the receiving groove to the lower surface of the first disc portion, and is connected with the central hole of the annular body; a plurality of first limiting support blocks are formed at the bottom of the receiving groove, and the first limiting support block is located between the first disc portion and the second disc portion; the first limiting support block is attached to the upper surface of the second disc portion to achieve height limitation; the first plastic part also has a second limiting support block extending into the receiving groove, a support step is provided at the end of the second limiting support block, and a positioning edge is formed on the second disc portion to cooperate with the support step for limiting.

8. The power female connector according to claim 5 or 6, characterized in that: The grounding terminal is an overall U-shaped structure and also includes a connecting portion, and the pair of elastic terminal portions are symmetrically arranged at the lateral ends of the connecting portion; movable mounting grooves are arranged on the left and right sides of the second plastic part; the movable mounting groove is an open opening structure on the side facing the outside of the second plastic part, and a through opening connected to the slot is formed on the side facing the inside of the second plastic part; the connecting portion is arranged closely to the front surface of the second plastic part, and the left and right two elastic terminal portions are respectively assembled and extended into the movable mounting groove, and the elastic contact portion of the elastic terminal portion extends into the slot through the through opening.

9. The power female connector according to claim 8, characterized in that: A plurality of limit assembly grooves are arranged on the front side surface of the second plastic part, and a plurality of limit inserts are arranged on the upper edge and the lower edge of the connecting part to be horizontally inserted into the limit assembly grooves, and barbed protrusions are arranged on the two side edges of the limit inserts to prevent retreat by interfering with the groove wall of the limit assembly groove.

10. The power female connector according to claim 8, characterized in that: The grounding terminal also includes a third welding portion, which is bent downward from the lower edge of the middle portion of the connecting portion and then extends horizontally forward to form; the first welding portion, the second welding portion and the third welding portion are arranged to extend out from the front side surface of the second component.

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