TWI873515B - Terminal limiting structure of a connector and molding method thereof - Google Patents

Abstract

The present disclosure provides a terminal limiting structure of a connector, which may prevent the terminal from floating and deforming due to re- gluing. The terminal limiting structure comprises a terminal carrier. The terminal carrier is provided with a terminal group. The terminal carrier is provided with a plurality of clamping grooves. The terminal group is riveted and embedded in the plurality of clamping grooves. The clamping grooves include a positioning groove, which is provided on the terminal carrier. Two sides of the positioning groove are provided with a matching positioning column extending out of the plane of the terminal carrier. The top of an inner side wall of the positioning column facing the positioning groove is provided with a pressing block protruding inwardly. The bottom surface of the positioning groove is arranged on the surface of the terminal carrier. The bottom surface of the positioning groove and the surface of the terminal carrier are located on the same plane. The present disclosure adopts a four-sided snap terminal structure design with a positioning groove. When the insulating seat is glued, the four-sided snap-in limiting structure of the terminal is strengthened.

Description

A terminal limiting structure of a connector and a forming method thereof

The present invention relates to the field of connector technology, and in particular to a four-sided buckle limit structure design for the terminal of a connector during injection molding.

Connectors are mainly installed on computer peripherals, servers, routers, switching equipment and other products. They are used to transmit data and connect peripherals, and are widely used in the fields of networking, communications, and automation control.

As electronic products become more and more versatile and the market develops in a diversified way, the requirements for product structure increase, and the stability requirements for connectors become higher and higher. It is necessary to add a terminal fixing structure to the connector to achieve the purpose of protection. In the conventional USB Type C connector structure, the conventional USB Molding design terminal adopts three-sided limit, that is, the terminal only has left and right and bottom limit, and lacks top limit. When molding, the terminal is easy to float and deform from the top, thereby affecting the signal transmission quality.

In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a limiting structure for a four-sided snap-on terminal, which can prevent the terminal from floating and deforming due to molding again.

To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a terminal limiting structure of a connector, comprising a terminal carrier, a terminal group is provided on the terminal carrier; a plurality of clamping grooves are provided on the terminal carrier, and the terminal group is riveted and embedded in the clamping grooves; the clamping grooves include a positioning groove, which is provided on the terminal carrier; a positioning column extending from the flat protrusion of the terminal carrier and matching with each other is provided on both sides of the positioning groove, and a pressing block protruding inward is provided on the top of an inner wall of the positioning column facing the positioning groove;

The top of the inner wall of the positioning column at one side of the positioning groove is provided with a holding block protruding inwards;

The bottom surface of the positioning groove is arranged on the surface of the terminal carrier, the bottom surface of the positioning groove and the surface of the terminal carrier are located on the same plane, and the thickness (width) of the holding block is 1/4 to 1/7 of the width of the positioning groove.

Furthermore, in some embodiments, the ratio of the length D2 of the holding block to the side wall width D1 of the inner wall is 1:1.5-2.5.

Furthermore, in some embodiments, the top of the inner wall of the positioning column on both sides of the positioning groove is provided with inwardly protruding, symmetrically matching holding blocks; that is, the top of the inner wall on both sides of the positioning groove is provided with inwardly protruding, correspondingly matching holding blocks.

Furthermore, in some embodiments, the length ratio of the length D2 of the holding block to the side wall width D1 of the inner wall is 1:2;

The top of the inner wall of the positioning column on both sides of the positioning groove is provided with the holding block which protrudes inwards and is arranged in a staggered manner;

The holding blocks on both sides of the positioning groove are staggered and arranged in a front-to-back correspondence on the same plane.

Furthermore, in some embodiments, the thickness (width) of the holding block is 1/6 of the width of the positioning groove, and the holding block portion protruding inwardly and hung on the inner wall surface blocks the positioning groove.

Furthermore, in some embodiments, the top of the positioning column is provided with an inclined surface inclined toward the positioning groove, the top surface of the holding block is coplanar with the inclined surface, and the holding block is an isosceles trapezoid;

The bottom surface of the pressing block is perpendicular to the inner wall surface, and the bottom surface of the pressing block is parallel to the bottom surface of the positioning groove.

Furthermore, in some embodiments, the positioning groove is provided with a hollow hole penetrating the terminal carrier, and the hollow hole is arranged below the holding block;

One end of the hollow hole is arranged on the bottom surface of the positioning groove, and the other end of the hollow hole is arranged on the surface of the terminal carrier away from the positioning groove.

Furthermore, in some embodiments, the terminal group is riveted and embedded in the clamping grooves, the left and right sides of the inner wall are pressed against the two sides of a terminal of the terminal group, the bottom surface of the terminal group is pressed against the bottom surface of the positioning groove, the top surface of the terminal of the terminal group is pressed under the holding block, and the terminal group is embedded in the clamping grooves with upper and lower and left and right limit positions.

Furthermore, in some embodiments, a front-row clip groove is provided on one side of the terminal carrier close to a tongue plate, a rear-end clip groove is provided on one end of the terminal carrier away from the tongue plate, and a middle clip groove is provided in the middle of the terminal carrier, between the front-row clip groove and the rear-end clip groove; The front-row clip groove, the middle clip groove, and the rear-end clip groove are symmetrically arranged in parallel; The front-row clip groove is composed of the clip grooves arranged in parallel and spaced rows, the middle clip groove is composed of the clip grooves arranged in parallel and spaced rows, and the rear-end clip groove is composed of the clip grooves arranged in parallel and spaced rows.

A molding method for a terminal limiting structure of a connector adopts two-step injection molding, and the method is as follows: S1, an isolation sheet is injection molded and set on the terminal carrier; S2, the (upper and lower) terminal assembly is riveted on the terminal carrier, and the material strip is removed to obtain a semi-finished product; S3, the semi-finished product is injection molded and set in an insulating seat body; S4, an inner shell is riveted on the above-mentioned insulating seat body, and an outer shell is mounted on the inner shell.

The present invention is applied to USB Type C connectors, and adopts a positioning groove four-sided buckle terminal structure design. The left and right sides of the inner wall are pressed against the two sides of the terminal group, the bottom surface of the terminal group is pressed against the bottom surface of the positioning groove, and the top surface of the terminal group is pressed under the holding block, that is, the terminal is embedded in the clamping grooves in upper and lower and left and right limit positions. When the insulating seat body is molded and punched, a four-sided clamp terminal limit structure is added, which strengthens a terminal four-sided buckle limit structure, and can prevent the terminal from floating and deforming due to molding again.

In order to further understand the features, technical means, and specific purposes and functions of the present invention, the embodiments in this application and the features in the embodiments can be combined with each other without conflict. In order to further understand the features, technical means, and specific purposes and functions of the present invention, analyze the advantages and spirit of the present invention, and further understand the present invention through the following detailed description of the present invention in combination with the attached drawings and specific implementation methods.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

The terms "vertical", "horizontal", "front", "rear" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

As shown in Figures 1 to 3, Figures 5 to 9 and Figure 11.

The present invention includes an isolation plate 15, on which a plurality of bent reinforcing arms 16 are provided. The isolation plate 15 and the bent reinforcing arms 16 are embedded in a terminal carrier 14; the terminal carrier 14 is provided with a plurality of clamping grooves 21, and a terminal set 19 is provided on the terminal carrier 14. The terminal set 19 is riveted and embedded in the clamping grooves 21.

The terminal carrier 14 and the terminal assembly 19 are injection-molded and embedded in an insulating base body 11. A tongue plate 17 is provided at one end of the insulating base body 11. An inner shell 12 is sleeved on the insulating base body 11. The insulating base body 11 is embedded in the inner shell 12, and the tongue plate 17 is arranged in the inner shell 12; an outer shell 13 is sleeved on the inner shell 12, and a plurality of longitudinally extending plug-in pieces 18 are provided on the outer shell 13.

Furthermore, a front slot 27 is provided on one side of the terminal carrier 14 close to the tongue plate 17, a rear slot 29 is provided on one end of the terminal carrier 14 away from the tongue plate 17, and a middle slot 28 is provided in the middle of the terminal carrier 14, between the front slot 27 and the rear slot 29.

Optimally, the front row clip slot 27, the middle clip slot 28, and the rear end clip slot 29 are symmetrically arranged in parallel. The front row clip slot 27 is composed of a plurality of clip slots 21 arranged in parallel and spaced relation, the middle clip slot 28 is composed of the clip slots 21 arranged in parallel and spaced relation in rows, and the rear end clip slot 29 is composed of the clip slots 21 arranged in parallel and spaced relation in rows. The parallel and spaced arrangement between the clip slots refers to the parallel and spaced relation in rows and rows, in other words, the parallel and spaced arrangement refers to the parallel and spaced relation in rows and columns.

The clamping grooves 21 include a positioning groove 22, which is arranged on the terminal carrier 14; further, the bottom surface of the positioning groove 22 is arranged on the surface of the terminal carrier 14. In other words, the bottom surface of the positioning groove 22 and the surface of the terminal carrier 14 are located on the same plane, that is, the bottom surface of the positioning groove 22 and the surface of the terminal carrier 14 are arranged in the same plane.

A positioning column 26 extending out of the plane of the terminal carrier 14 is provided on both sides of the positioning groove 22, and a pressing block 24 protruding inward is provided on the top of an inner wall surface 23 of the positioning groove 22 of the positioning column 26. The top of the positioning column 26 is provided with an inclined insertion surface 25 inclined toward the positioning groove 22, and the top surface of the pressing block 24 is coplanar with the inclined insertion surface 25, and the pressing block 24 is an isosceles trapezoid.

The thickness (width) of the holding block 24 is 1/4 to 1/7 of the width of the positioning groove 22; preferably, the thickness (width) of the holding block 24 is 1/6 of the width of the positioning groove 22, that is, the holding block 24 that is hung on the inner wall surface 23 and protrudes inwardly blocks the positioning groove 22.

Furthermore, in order to achieve better riveting, embedding, and elastic tolerance of the terminal assembly 19 in the clamping grooves 21, the ratio of the length D2 of the clamping block 24 to the width D1 of the inner wall surface 23 is 1:1.5-2.5. Preferably, the ratio of the length D2 of the clamping block 24 to the width D1 of the inner wall surface 23 is 1:2, that is, the length D2 of the clamping block 24 is half of the width D1 of the inner wall surface 23.

The positioning groove 22 is provided with a hollow hole 31 penetrating through the terminal carrier 14 . The hollow hole 31 is disposed below the pressing block 24 .

Furthermore, one end of the hollow hole 31 is disposed on the bottom surface of the positioning groove 22, and the other end of the hollow hole 31 is disposed on the surface of the terminal carrier 14 away from the positioning groove 22. The hollow hole 31 is used to enhance the embedding strength of the insulating seat body 11 after injection molding on the terminal carrier 14, and enhance the firmness between the insulating seat body 11 and the terminal carrier 14 insert.

After the terminal assembly 19 is riveted and embedded in the clamping grooves 21, as shown in FIG. 10, the left and right sides of the inner wall surface 23 are pressed against the two sides of the terminal assembly 19, the bottom surface of the terminal assembly 19 is pressed against the bottom surface of the positioning groove 22, and the top surface of the terminal assembly 19 is pressed under the clamping block 24, that is, the terminal assembly 19 is embedded in the clamping grooves 21 with upper and lower and left and right limit positions.

The USB Type C connector molding card terminal structure design description of the present invention:

Injection molding adds a four-sided clamp terminal limit structure to prevent a terminal from floating and deforming during molding and punching. Assemble and rivet (upper and lower) the terminal group 19, remove the material strip, and then mold again.

As shown in FIG4 , the present invention adopts two injection molding:

S1, the isolation sheet 15 is injection molded and disposed on the terminal carrier 14;

S2, assembling and riveting the (upper and lower) terminal assembly 19 onto the terminal carrier 14, removing the material strip, and obtaining the semi-finished product;

S3, placing the semi-finished product in the insulating seat body 11 by injection molding;

After step S3, the insulating base 11 is riveted onto the inner shell 12, and then the outer shell 13 is mounted on the inner shell 12 (as shown in FIG. 3 ).

The above embodiments only express a plurality of preferred embodiments of the present invention, and the description thereof is relatively specific and detailed. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge in the relevant fields, and should not be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, multiple variations and improvements can be made without departing from the concept of the present invention. The changes and modifications made by the technicians in this field do not depart from the spirit and scope of the present invention, and all of these belong to the scope of protection of the claims attached to the present invention. Therefore, the protection scope of the patent of this invention shall be based on the attached claims.

11: Insulation seat 12: Inner shell 13: Outer shell 14: Terminal carrier 15: Isolation sheet 16: Bend reinforcement arm 17: Tongue plate 18: Connector 19: Terminal assembly 21: Clamping groove 22: Positioning groove 23: Inner wall 24: Pressing block 25: Oblique insertion surface 26: Positioning column 27: Front clamping groove 28: Middle clamping groove 29: Rear clamping groove 31: Hollow hole

The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 is a cross-sectional structural diagram of the terminal carrier portion of the embodiment of the present invention; Figure 2 is a structural schematic diagram of the terminal carrier portion of the embodiment of the present invention; Figure 3 is a schematic diagram of the embodiment of the present invention; Figure 4 is a schematic diagram of the injection molding of the embodiment of the present invention; Figure 5 is a three-dimensional schematic diagram of the terminal carrier portion of the embodiment of the present invention; Figure 6 is a top view schematic diagram of the terminal carrier portion of the embodiment of the present invention; Figure 7 is a three-dimensional schematic diagram of the embodiment of the present invention; Figure 8 is a three-dimensional schematic diagram of the terminal group portion of the embodiment of the present invention; Figure 9 is a decomposed schematic diagram of the embodiment of the present invention; Figure 10 is a schematic diagram of the clamping groove portion of the embodiment of the present invention; and Figure 11 is an enlarged schematic diagram of part A in Figure 2.

14: Terminal carrier

19: Terminal group

21: Clamping slot

24: Pressure holding block

26: Positioning column

Claims (9)

A terminal limiting structure of a connector comprises: a terminal carrier (14), a terminal group (19) being arranged on the terminal carrier (14); a plurality of clamping grooves (21) being arranged on the terminal carrier (14), the terminal group (19) being riveted and embedded in the clamping grooves (21); the clamping grooves (21) comprising a positioning groove (22), the positioning groove (22) being arranged on the terminal carrier (14); and positioning columns (26) extending from the plane protrusion of the terminal carrier (14) and matching with each other are arranged on both sides of the positioning groove (22). , a pressing block (24) protruding inward is provided on the top of an inner wall surface (23) of the positioning column (26) facing the positioning groove (22); and the bottom surface of the positioning groove (22) is arranged on the surface of the terminal carrier (14), the bottom surface of the positioning groove (22) and the surface of the terminal carrier (14) are located on the same plane, the thickness of the pressing block (24) is 1/4 to 1/7 of the width of the positioning groove (22), and the ratio of the length D2 of the pressing block (24) to the side wall width D1 of the inner wall surface (23) is 1:1.5 to 2.5. The terminal limiting structure of the connector as described in claim 1, wherein the top of the inner wall surface (23) of the positioning column (26) on both sides of the positioning groove (22) is provided with an inwardly protruding, symmetrically matched holding block (24). The terminal limiting structure of the connector as described in claim 1, wherein the length ratio of the length D2 of the pressing block (24) to the side wall width D1 of the inner wall surface (23) is 1:2; the inner wall surface (23) of the positioning column (26) on both sides of the positioning groove (22) is provided with the pressing block (24) protruding inward and arranged in a staggered manner; and the pressing blocks (24) on both sides of the positioning groove (22) are staggered and arranged in front and back on the same plane. The terminal limiting structure of the connector as described in claim 1, wherein the thickness of the holding block (24) is 1/6 of the width of the positioning groove (22), and the holding block (24) protruding inwardly and hung on the inner wall (23) partially blocks the positioning groove (22). The terminal limiting structure of the connector as described in claim 2, wherein the top of the positioning column (26) is provided with an inclined insertion surface (25) inclined toward the positioning groove (22), the top surface of the pressing block (24) is coplanar with the inclined insertion surface (25), and the pressing block (24) is an isosceles trapezoid; and the bottom surface of the pressing block (24) is perpendicular to the inner wall surface (23), and the bottom surface of the pressing block (24) is parallel to the bottom surface of the positioning groove (22). The terminal limiting structure of the connector as described in claim 1, wherein the positioning groove (22) is provided with a hollow hole (31) penetrating the terminal carrier (14), and the hollow hole (31) is arranged below the holding block (24); and one end of the hollow hole (31) is arranged on the bottom surface of the positioning groove (22), and the other end of the hollow hole (31) is arranged on the surface of the terminal carrier (14) away from the positioning groove (22). The terminal limiting structure of the connector as described in claim 1, wherein the left and right sides of the inner wall surface (23) are pressed against the two sides of a terminal of the terminal group (19), the bottom surface of the terminal group (19) is pressed against the bottom surface of the positioning groove (22), the top surface of the terminal of the terminal group (19) is pressed under the holding block (24), and the terminal group (19) is embedded in the clamping groove (21) for upper and lower and left and right limiting. A terminal limiting structure of a connector as described in claim 1, wherein a front row slot (27) is provided on a side of the terminal carrier (14) close to a tongue plate (17), a rear end slot (29) is provided on an end of the terminal carrier (14) away from the tongue plate (17), and a middle slot (29) is provided in the middle of the terminal carrier (14) between the front row slot (27) and the rear end slot (29). 28); the front row clip groove (27), the middle clip groove (28), and the rear end clip groove (29) are symmetrically arranged in parallel; and the front row clip groove (27) is composed of the clip grooves (21) arranged in parallel and spaced relation, the middle clip groove (28) is composed of the clip grooves (21) arranged in parallel and spaced relation, and the rear end clip groove (29) is composed of the clip grooves (21) arranged in parallel and spaced relation. A molding method for a terminal stop structure of a connector as described in any one of claims 1 to 8, wherein the molding method adopts two-step injection molding: S1, an isolation sheet (15) is injection molded and arranged on the terminal carrier (14); S2, the terminal assembly (19) is assembled and riveted on the terminal carrier (14), and the material strip is removed to obtain a semi-finished product; S3, the semi-finished product is injection molded and arranged in an insulating seat (11); S4, an inner shell (12) is riveted on the insulating seat (11), and an outer shell (13) is then mounted on the inner shell (12).

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