Three-plug inner frame assembly

Abstract

The utility model discloses a three-plug inner frame assembly. The live wire terminal jack, the null line terminal jack and the ground wire terminal jack are arranged on the inner frame body, a live wire terminal and a null line terminal are both of a flat structure, a ground wire terminal is of a rod-shaped structure, the outer diameter of the root of the ground wire terminal is larger than that of the upper middle portion of the ground wire terminal, and the ground wire terminal can be in interference fit with the ground wire terminal jack. Ground wire terminal pits are annularly distributed on the outer circumferential surface of the root of the ground wire terminal, zero wire terminal pits are distributed on the surface of the root of the zero wire terminal, and ground wire terminal pits are distributed on the surface of the root of the ground wire terminal. The utility model has the advantages that: the aim of increasing friction force by increasing the roughness of a contact surface is fulfilled, so that the stability and reliability of connection are improved, an anti-rotation effect is achieved, enough high holding force is ensured, the reliability of installation is improved, the percent of pass of products is ensured, the structural design is very simple, the manufacture and the installation are easy, and the production cost is reduced. And the product cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of assembling structure of plug and inner frame, specifically a three-plug inner frame assembly. BACKGROUND

[0002] In the assembling process of three-plug plug and inner frame, live terminal, zero terminal and ground terminal are assembled to inner frame, for conventional three-plug plug, since each terminal is flat structure, its assembly is relatively easy, but for the three-plug plug with rod-shaped ground terminal with better performance, the live terminal and zero terminal configured are flat structure, and the assembly is also very easy, but the assembly of its rod-shaped ground terminal is more difficult, the main difficulty is that the ground terminal is prone to rotation and shaking after installation during insertion into the mounting hole of inner frame, thereby affecting subsequent assembly work, therefore, it is easy to make three-plug plug product exist circumferential rotation problem, which will affect product yield and electrical safety, later, Chinese patent No. 201720215526.0, a utility model patent for ground terminal fixing structure of plug inner frame, the patent is mainly through the first protrusion provided at one end of ground terminal, wherein the hole wall upper edge of the third perforation is provided with a first recess, after the ground terminal passes through the third perforation, the first protrusion is embedded in the first recess, so that the axial sliding and circumferential rotation of the ground terminal are limited, to facilitate rivet operation, this structure indeed solves the problem of circumferential rotation of three-plug plug product after forming, but for such assembly, its size is very small, and the length of each terminal is only 2-3 cm, so it is difficult to process the above-mentioned protrusion on the ground terminal, even if it can be processed, it needs to be equipped with special equipment, which makes its manufacturing cost very high. SUMMARY

[0003] The utility model solves the technical problem to provide a kind of three-plug inner frame assembly that is easy to process, low in manufacturing cost and can guarantee installation reliability, thereby improving product yield and ensuring electrical safety.

[0004] In order to solve the above technical problems, the three-insert inner frame assembly, which comprises an inner frame body and a live line terminal insertion hole, a zero line terminal insertion hole and a ground line terminal insertion hole arranged on the inner frame body and used for inserting a live line terminal, a zero line terminal and a ground line terminal, the live line terminal and the zero line terminal are both flat structures, the ground line terminal is a rod structure, the outer diameter of the root of the ground line terminal is greater than the outer diameter of the upper middle part and can form an interference fit with the ground line terminal insertion hole, the outer circumferential surface of the root of the ground line terminal is circumferentially provided with a ground line terminal pit used for enhancing the friction between the ground line terminal insertion hole, the root surface of the zero line terminal is provided with a zero line terminal pit used for enhancing the friction between the zero line terminal insertion hole, and the root surface of the live line terminal is provided with a live line terminal pit used for enhancing the friction between the live line terminal insertion hole.

[0005] At least one deformation resistance groove is arranged in the ground line terminal insertion hole, and the insertion of the ground line terminal into the ground line terminal insertion hole can cause the deformation of the deformation resistance groove to improve the friction and thus improve the holding force.

[0006] The ground line terminal is composed of a flange section at the root and a body section connected to the flange section, the diameter of the flange section is greater than the diameter of the body section and causes the interference fit between the flange section and the ground line terminal insertion hole, and the ground line terminal pits are circumferentially arranged on the flange section.

[0007] The ground line terminal is formed by winding a metal sheet, and a metal column at the flange section is embedded in an inner cavity formed by winding the metal sheet.

[0008] The metal sheet is provided with an indentation at the flange section and used for pressing and fixing the metal column.

[0009] The deformation resistance groove is an arc-shaped blind groove opened from the bottom of the ground line terminal insertion hole.

[0010] Two symmetrical deformation resistance grooves are arranged in the ground line terminal insertion hole.

[0011] An annular taper is arranged between the flange section and the body section.

[0012] The root of the live line terminal is provided with a live line terminal side flange on the side surface thereof, and the root of the zero line terminal is provided with a zero line terminal side flange on the side surface thereof.

[0013] The upper part of the live line terminal side flange and the upper part of the zero line terminal side flange are both provided with a guide inclined surface.

[0014] A live line terminal protrusion is punched on the flat surface of the live line terminal at the root thereof and used for cooperating with the live line terminal insertion hole, and a zero line terminal protrusion is punched on the flat surface of the zero line terminal at the root thereof and used for cooperating with the zero line terminal insertion hole.

[0015] The utility model discloses the advantages are:

[0016] (1) through the ground wire terminal pit that cooperates with ground wire terminal jack, zero line terminal pit that cooperates with fire line terminal pit and fire line terminal pit cooperation, thereby realized through increasing the roughness of contact surface to increase the purpose of friction, thereby improved the stability reliability of connection.

[0017] (2) when the ground wire terminal is inserted into the ground wire terminal jack, can make the deformation resistance groove produce deformation to improve the friction and further improve the holding force, thereby on the basis of interference fit installation, cleverly use the plastic deformation of deformation resistance groove to improve the friction, and further play the anti-rotation effect, guarantee enough high holding force simultaneously, improve the reliability of installation, also guarantee the qualified rate of product, in addition, the structure design is very simple, easy to manufacture and install, reduce the product cost.

[0018] (3) the ground wire terminal is formed by a flange section at the root and the body section connected to the flange section, and the flange section is interference fit with the ground wire terminal jack, thereby the body section can easily pass through the ground wire terminal jack, only the flange section realizes interference fit, further reduce the installation difficulty, improve the product manufacturing efficiency, reduce the product manufacturing cost.

[0019] (4) the ground wire terminal is formed by winding a metal sheet and embedding a metal column at the flange section in the inner cavity formed by winding the metal sheet, thereby not only easy to shape the ground wire terminal, but also can use the metal column to ensure the support strength of the flange section, improve the quality of the product and further improve the stability of positioning installation, prolong the service life of the product.

[0020] (5) the deformation resistance groove is an arc-shaped blind groove opened from the bottom of the ground wire terminal jack, and four side edges formed by the arc-shaped blind groove and the ground wire terminal jack are in contact with the outer surface of the ground wire terminal, which can reduce the assembly difficulty during installation, and the plastic deformation after installation can maintain reliable contact force with the flange section, further improving the installation effect.

[0021] (6) two symmetrical deformation resistance grooves are arranged in the ground wire terminal jack, making the stress more reasonable and the installation stability and reliability better.

[0022] (7) an annular taper is arranged between the flange section and the body section, further reducing the installation difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is whole structure schematic diagram of the utility model three plug inner frame assembly;

[0024] Figure 2 It is the exploded structural schematic view of three plug inner frame assembly of the utility model;

[0025] Figure 3 It is the bottom view structural schematic view of inner frame body in the utility model;

[0026] Figure 4 It is Figure 2 The enlarged structural schematic view of A place of

[0027] Figure 5 It is the bottom view structural schematic view of three plug inner frame assembly of the utility model. DETAILED DESCRIPTION

[0028] The three plug inner frame assembly of the utility model is further explained in detail in combination with the drawings and specific embodiments.

[0029] As shown in the figure, the three plug inner frame assembly of the utility model, including inner frame body 1 and the fire wire terminal insertion hole 3 for inserting the fire wire terminal 2, the zero wire terminal insertion hole 5 for inserting the zero wire terminal 4 and the ground wire terminal insertion hole 7 for inserting the ground wire terminal 6 set on the inner frame body, the fire wire terminal 2 and the zero wire terminal 4 are both flat structure, the ground wire terminal 6 is bar structure, the flat surface of the fire wire terminal 2 is punched with the fire wire terminal convex point 18 at its root and used for cooperating with the fire wire terminal insertion hole, so that the fire wire terminal 2 can be stably positioned and inserted in the fire wire terminal insertion hole by using the fire wire terminal convex point 18; the flat surface of the zero wire terminal is punched with the zero wire terminal convex point 19 at its root and cooperates with the zero wire terminal insertion hole, so that the zero wire terminal can be stably positioned and inserted in the zero wire terminal insertion hole by using the zero wire terminal convex point 19; the outer diameter of the root of the ground wire terminal 6 is greater than the outer diameter of its upper middle part and can form interference fit with the ground wire terminal insertion hole, the root outer circumferential surface of the ground wire terminal 6 is circumferentially arranged with the ground wire terminal pit 8 for enhancing the friction between the ground wire terminal insertion hole, the root surface of the zero wire terminal 4 is arranged with the zero wire terminal pit 9 for enhancing the friction between the zero wire terminal insertion hole 5, the root surface of the fire wire terminal 2 is arranged with the fire wire terminal pit 10 for enhancing the friction between the fire wire terminal insertion hole 3, the ground wire terminal insertion hole 7 is provided with two deformation resistance grooves 11, the two deformation resistance grooves 11 are symmetrically arranged in the ground wire terminal insertion hole 7, the ground wire terminal 6 inserted into the ground wire terminal insertion hole can make the deformation resistance groove 11 produce deformation to improve the friction and further improve the holding force.

[0030] Further, the grounding wire terminal 6 is composed of a flange section 12 at the root and a body section 13 connected to the flange section, the diameter of the flange section 12 is larger than that of the body section 13 and the flange section is in interference fit with the grounding wire terminal insertion hole, the grounding wire terminal recess 8 is arranged around the flange section, and an annular taper 15 is arranged between the flange section 12 and the body section 13, which can have a certain guiding effect and further reduce the installation difficulty.

[0031] Further, the grounding wire terminal 6 is composed of a flange section 12 at the root and a body section 13 connected to the flange section, the diameter of the flange section 12 is larger than that of the body section 13 and the flange section is in interference fit with the grounding wire terminal insertion hole, the grounding wire terminal recess 8 is arranged around the flange section, and an annular taper 15 is arranged between the flange section 12 and the body section 13, which can have a certain guiding effect and further reduce the installation difficulty.

[0032] Further, the grounding wire terminal 6 is composed of a flange section 12 at the root and a body section 13 connected to the flange section, the diameter of the flange section 12 is larger than that of the body section 13 and the flange section is in interference fit with the grounding wire terminal insertion hole, the grounding wire terminal recess 8 is arranged around the flange section, and an annular taper 15 is arranged between the flange section 12 and the body section 13, which can have a certain guiding effect and further reduce the installation difficulty.

[0033] Further, the grounding wire terminal 6 is composed of a flange section 12 at the root and a body section 13 connected to the flange section, the diameter of the flange section 12 is larger than that of the body section 13 and the flange section is in interference fit with the grounding wire terminal insertion hole, the grounding wire terminal recess 8 is arranged around the flange section, and an annular taper 15 is arranged between the flange section 12 and the body section 13, which can have a certain guiding effect and further reduce the installation difficulty.

[0034] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the present application shall also belong to the protection scope of the present application.

Claims

1. A three-pronged inner holder assembly, comprising an inner holder body (1) and a live line terminal insertion hole (3) provided on the inner holder body (1) for inserting a live line terminal (2), a zero line terminal insertion hole (5) provided on the inner holder body (1) for inserting a zero line terminal (4), and a ground line terminal insertion hole (7) provided on the inner holder body (1) for inserting a ground line terminal (6), characterized in that: The firewire terminal (2) and the zero line terminal (4) are flat structure, the ground wire terminal (6) is rod structure, the outer diameter of the root of the ground wire terminal (6) is greater than the upper middle part, and the interference fit between the ground wire terminal and the ground wire terminal socket can be formed, the outer circumferential surface of the root of the ground wire terminal (6) is arranged with the ground wire terminal pit (8) for enhancing the friction between the ground wire terminal and the ground wire terminal socket, the root surface of the zero line terminal (4) is arranged with the zero line terminal pit (9) for enhancing the friction between the zero line terminal and the zero line terminal socket (5), and the root surface of the firewire terminal (2) is arranged with the firewire terminal pit (10) for enhancing the friction between the firewire terminal and the firewire terminal socket (3).

2. The triple-inset holder assembly of claim 1, wherein: At least one deformation resistance groove (11) is arranged in the ground wire terminal socket (7), and the deformation resistance groove (11) can be deformed to improve the friction and the holding force when the ground wire terminal (6) is inserted into the ground wire terminal socket.

3. The triple-inset holder assembly of claim 1 or 2, wherein: The ground wire terminal (6) is composed of a flange section (12) at the root and a body section (13) connected to the flange section, the diameter of the flange section (12) is greater than that of the body section (13), and the interference fit between the flange section and the ground wire terminal socket is formed, and the ground wire terminal pit (8) is arranged around the flange section.

4. The triple-inset holder assembly of claim 3, wherein: The ground wire terminal (6) is formed by winding a metal sheet, and a metal column (14) at the flange section is embedded in the inner cavity formed by winding the metal sheet.

5. The triple-inset holder assembly of claim 4, wherein: The metal sheet is provided with an indentation at the flange section for pressing the metal column.

6. The triple-inset holder assembly of claim 2, wherein: The deformation resistance groove (11) is an arc-shaped blind groove opened from the bottom of the ground wire terminal socket.

7. The triple-inset holder assembly of claim 6, wherein: Two symmetrical deformation resistance grooves are arranged in the ground wire terminal socket (7).

8. The triple-inset holder assembly of claim 3, wherein: An annular taper (15) is arranged between the flange section (12) and the body section (13).

9. The triple-inset holder assembly of claim 8, wherein: The root of the firewire terminal (2) is provided with a firewire terminal side flange (16) on the side surface thereof, and the root of the zero line terminal (4) is provided with a zero line terminal side flange (17) on the side surface thereof.

10. The triple-inset holder assembly of claim 9, wherein: The upper part of the firewire terminal side flange (16) and the upper part of the zero line terminal side flange (17) are provided with guide inclined surfaces, the flat surface of the firewire terminal (2) is punched with a firewire terminal protrusion (18) at the root thereof for cooperating with the firewire terminal socket, and the flat surface of the zero line terminal is punched with a zero line terminal protrusion (19) at the root thereof for cooperating with the zero line terminal socket.

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