Flat plug terminal

Abstract

The utility model relates to a flat plug terminal, which comprises a plug terminal, two opposite sides of the plug terminal are provided with wide surfaces, a thickness is arranged between the two wide surfaces, and the thickness forms two narrow surfaces on the opposite sides. The plug terminal sequentially defines a contact section which can be inserted into a socket, a section to be coated which is coated by an insulating layer, a clamped section which is clamped by an inner frame body and a riveting section which is used for riveting an electric wire, the clamped section is provided with a positioning hole, and anti-bending parts which protrude relative to the section to be coated are formed on the two sides of the wide surface of the clamped section; wherein two sides of the narrow surface form a strip-shaped shallow groove which is flat with the section to be coated, and two sides of the section to be coated are respectively provided with a strip-shaped shallow groove which is communicated with the positioning hole. According to the utility model, no segment difference is formed between the two sides of the narrow surface and the segment to be coated, so that the flow resistance of the molten rubber material is reduced, the molten rubber material can be quickly ejected once, an insulating layer and an inner frame body can be simultaneously finished, secondary ejection processing is not needed, the time and the labor are saved, and the reject ratio is reduced.

Description

Technical Field

[0001] The utility model relates to an electrical appliance connecting element, in particular to a flat plug terminal. Background Art

[0002] Currently, the industrial production of plugs with insulating layer plug terminals involves stamping a round copper rod into a flattened, slightly wide first blank. A hole is then bored and turned at one end of this first blank (the process is not part of the present invention and the relevant drawings are omitted). This is then electroplated to form the plug terminals, which are then injection-coated with an insulating layer (the first injection molding process) to form a preliminary semi-finished product (relative to the plug). This preliminary semi-finished product is then placed into an inner frame mold and injection-molded to form a semi-finished product with an inner frame (the second injection molding process). The final plug is then delivered to the manufacturer for injection molding.

[0003] Looking at the plug terminal 2 produced during the manufacturing process, Figure 3 and Figure 4 As shown, the plug terminal 2 has wide surfaces A on two opposite sides, and a thickness is formed between the two wide surfaces, and the thickness forms narrow surfaces B on two opposite sides. The plug terminal 2 sequentially defines a contact section 21 for being inserted into a socket, a to-be-covered section 22 for being covered by an insulating layer, a clamped section 23 for being clamped by an internal frame, and a riveted section 24 for riveting a wire. The clamped section 23 is provided with a positioning hole 230, wherein the clamped section 23 forms relative protrusions 231 protruding relative to the to-be-covered section 22 on both sides of the wide surface A, and forms relative protrusions 232 protruding relative to the to-be-covered section 22 on both sides of the narrow surface B, that is, the entire circumference of the clamped section 23 protrudes more than the to-be-covered section 22.

[0004] This type of terminal (especially Australian plug terminals) is currently manufactured by stamping, typically undergoing a second injection molding process to form an insulating layer and an inner frame. The completed insulating layer and terminal are then encapsulated and bonded to the inner frame before being sold to customers for a third injection molding process to form a complete plug. Specifically, the terminal is first placed in a mold for the insulating layer, and the first injection molding process produces the terminal with the insulating layer. The mold for the inner frame is then placed in a second injection molding process to produce the semi-finished plug with the insulating layer and inner frame. However, the prior art terminal structure, due to the relative protrusions 232 formed on both sides of the narrow surface B relative to the section to be coated 22, can easily cause the molten adhesive to be blocked and flow slowly during the first injection molding of the insulating layer. This slow flow can easily cause the adhesive to solidify, resulting in adhesive gaps in the insulating layer. To avoid adhesive gaps, increasing the injection molding pressure can easily lead to defects such as overflow and burrs. Furthermore, the insulating layer exhibits poor coating and a weak insulation layer. Moreover, when the entire periphery of the clamped section 23 is more protruding than the section to be covered 22, not only the material used (usually copper) is relatively increased, but also the cost is high due to the high cost of metal materials. Utility Model Content

[0005] In view of the problems in the prior art, the present invention aims to provide a flat plug terminal.

[0006] The utility model provides a flat plug terminal, characterized in that it comprises a plug terminal, wherein the plug terminal has wide surfaces on two opposite sides, a thickness is formed between the two wide surfaces, and the thickness forms narrow surfaces on two opposite sides, and the plug terminal sequentially defines a contact section for being plugged into a socket, a to-be-covered section for being covered by an insulating layer, a clamped section for being clamped by an inner frame, and a riveted section for riveting an electric wire, wherein the clamped section is provided with a positioning hole, and the clamped section forms anti-bending portions on two sides of the wide surface that protrude relative to the to-be-covered section, wherein the two sides of the narrow surface are flush with the to-be-covered section, and the two sides of the to-be-covered section are each provided with a strip-shaped shallow groove connected to the positioning hole.

[0007] Because the two sides of the narrow surface are flush with the section to be covered, and a shallow strip groove is provided on each side of the section to be covered, communicating with the positioning hole, material usage can be relatively reduced, thereby lowering material costs. Furthermore, since the terminal with the insulating layer and its inner frame can be completed in a single injection molding process, this helps facilitate the smooth flow of the adhesive, avoiding adhesive defects during the insulation layer coating. That is, by forming the narrow surface of the present invention without a step difference from the section to be covered, the present invention reduces the flow resistance of the molten adhesive without the aforementioned shortcomings of conventional terminals. Furthermore, due to the low flow resistance, the insulating layer and inner frame can be quickly and simultaneously completed in a single injection molding process, eliminating the need for a secondary injection molding process, saving time, labor, and reducing the defect rate. Furthermore, the copper scraps produced by stamping further reduce material costs and do not affect the conductivity of the plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A plan view showing the wide side of the plug terminal of the present invention

[0009] Figure 2 This is a plan view of the plug terminal of the present invention, shown with a narrow side.

[0010] Figure 3 A plan view showing the wide side of a prior art plug terminal

[0011] Figure 4 A plan view showing a narrow side of a prior art plug terminal

[0012] Explanation of the reference numerals: 1-plug terminal; 11-contact section; 12-section to be covered; 121-strip shallow groove; 13-clamped section; 130-positioning hole; 131-anti-bending portion; 14-riveted section; C-wide surface; D-narrow surface; 2-plug terminal; 21-contact section 22-section to be covered; 23-clamped section; 230-positioning hole; 231-relative protrusion; 232-relative protrusion; 24-riveted section; A-wide surface; B-narrow surface. DETAILED DESCRIPTION

[0013] The following describes the structure, features and embodiments of the present invention with reference to the accompanying drawings to provide a better understanding of the present invention.

[0014] See also Figure 1 Cooperate Figure 2 As shown, the utility model provides a flat plug terminal, including a plug terminal 1, the plug terminal 1 having wide surfaces C on two opposite sides, a thickness between the two wide surfaces C, and the thickness forming narrow surfaces D on two opposite sides. The plug terminal 1 defines, in sequence, a contact section 11 for being plugged into a socket, a to-be-covered section 12 for being covered by an insulating layer, a clamped section 13 for being clamped by an internal frame, and a riveted section 14 for riveting a wire. The clamped section 13 is provided with a positioning hole 130. The clamped section 13 forms anti-bending portions 131 on both sides of the wide surface C that protrude relative to the to-be-covered section 12, wherein both sides of the narrow surface D are flush with the to-be-covered section 12, and both sides of the to-be-covered section 12 are provided with a strip-shaped shallow groove 121 connected to the positioning hole 130.

[0015] Because the two sides of the narrow surface D are flush with the section to be coated 12, and each side of the section to be coated 12 is provided with a shallow strip groove 121 connected to the positioning hole 130, material usage can be relatively reduced, thereby lowering material costs. Furthermore, since the terminal with the insulating layer and its inner frame can be completed in a single injection molding process, this helps facilitate the smooth flow of the adhesive, avoiding adhesive defects during the insulation coating. That is, by forming the two sides of the narrow surface D of the present invention without a step difference with the section to be coated 12, the present invention reduces the flow resistance of the molten adhesive, thus avoiding the aforementioned shortcomings of conventional terminals. Furthermore, due to the low flow resistance, the insulating layer and inner frame can be quickly and simultaneously completed in a single injection molding process, eliminating the need for a secondary injection molding process, saving time, labor, and reducing the defect rate. Furthermore, the copper scraps generated by stamping further reduce material costs and do not affect the conductivity of the plug. The above description is a preferred embodiment of the present utility model. For example, all equivalent changes made based on the present utility model fall within the scope of protection of the present utility model.

Claims

1. A flat plug terminal, characterized in that: The invention comprises a plug terminal, which has wide surfaces on two opposite sides, a thickness between the two wide surfaces, and the thickness forms narrow surfaces on two opposite sides. The plug terminal defines, in sequence, a contact section for being plugged into a socket, a section to be covered with an insulating layer, a clamped section for being clamped by an inner frame, and a riveted section for riveting wires. The clamped section is provided with a positioning hole. The clamped section forms anti-bending portions on both sides of the wide surface that protrude relative to the section to be covered, wherein the two sides of the narrow surface are flush with the section to be covered, and a strip-shaped shallow groove connected to the positioning hole is provided on each side of the section to be covered.

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