CN213717122U

CN213717122U - Plug inner frame and power plug

Info

Publication number: CN213717122U
Application number: CN202022950893.XU
Authority: CN
Inventors: 余崇威
Original assignee: Cixi Wanneng Electronics Co ltd
Current assignee: Cixi Wanneng Electronics Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-16
Anticipated expiration: 2030-12-08

Abstract

The utility model relates to a plug technical field particularly, relates to a plug inner tower and power plug. The plug inner frame comprises a shell and at least one metal terminal, wherein an insertion hole suitable for the metal terminal to penetrate through is formed in the shell, a mounting hole is formed in the metal terminal along the axial direction of the insertion hole, a rubber blocking sheet is arranged in the mounting hole and divides the mounting hole into a rubber punching cavity and a conductive cavity, a plug pin is suitable for penetrating through the rubber punching cavity and is abutted against the inner wall of the rubber punching cavity, at least one annular hole is formed in the joint of the metal terminal and the rubber blocking sheet, and the rubber punching cavity is communicated with the conductive cavity through the annular hole. The utility model discloses a plug inner frame can make metal terminal and participate in firm the bonding, can guarantee the good electrically conductive function of metal terminal again.

Description

Plug inner frame and power plug

Technical Field

The utility model relates to a plug technical field particularly, relates to a plug inner tower and power plug.

Background

The power plug is a device for connecting devices such as electrical appliances to a power supply, and in the prior art, the power plug comprises a plug inner frame, the plug inner frame is composed of a terminal and a shell, the terminal is inserted into a shell hole, a pin of the power supply is inserted into one end of the terminal to be connected, a power line is connected to the other end of the terminal, then molding outer mold processing is carried out, and plastic is subjected to glue punching from one end of the terminal connected with plug-in connection under the action of pressure, so that the terminal is firmly bonded with the plug-in connection.

When injection moulding, if the pressure of dashing glue is too big, the plastic then can fill to the terminal one end that is connected with the power cord along the terminal axial, influences the terminal and electrically conducts and even makes the terminal lose electrically conductive function, and people are equipped with on the inner wall of terminal for this reason and are used for preventing that the rear end dashes the film that blocks of gluing.

However, the plastic film can be prevented from being punched to the end of the terminal connected with the power line by the barrier film, but the plastic film can prevent a closed environment from being formed between the film and the inner wall of the terminal during injection molding, and air inside the terminal is difficult to effectively discharge, thereby affecting the punching effect of the plastic film.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to improve the dashing of plastic in inner tower mechanism and glue the effect, can make metal terminal and participate in firm the bonding, can guarantee the good electrically conductive function of metal terminal again.

In order to solve the problem, the utility model provides a plug inner frame, including casing and at least one metal terminal, seted up on the casing and be suitable for the spliced eye that metal terminal wore to establish, metal terminal follows a mounting hole has been seted up to the axial of spliced eye, metal terminal is in be equipped with in the mounting hole and keep off the film, it will to keep off the film the mounting hole is separated for the die cushion chamber and leads electrical cavity, participates in and is suitable for wearing to locate the die cushion intracavity and with the inner wall in die cushion chamber is contradicted, metal terminal with the junction that keeps off the film is equipped with at least one annular ring, the die cushion chamber with it passes through to lead electrical cavity the annular ring intercommunication.

Compared with the prior art, the utility model discloses a setting of annular ring for keep off the glue chamber that the film partition formed and electrically conductive chamber intercommunication, when the plastic is at injection moulding, keep off the film and can block the plastic, avoid a large amount of plastics to glue to electrically conductive intracavity and influence the electrically conductive function of metal terminal, impel simultaneously that the air that is extruded in the glue chamber can in time discharge through the annular ring, improve the glue effect of plastic in the plug inner frame; therefore, the utility model discloses a plug inner frame can make metal terminal and participate in firm the bonding, can guarantee the good electrically conductive function of metal terminal again.

Furthermore, the metal terminal comprises an electric connection section, a middle section and a wiring section which are sequentially connected, the electric connection section and the middle section are arranged in the plug hole in a penetrating mode, the wiring section penetrates out of the plug hole, and the rubber blocking sheet is arranged in the middle section.

Through adopting the technical scheme, the utility model discloses wear to locate the spliced eye with electricity section and middlings in, it not only can increase the structural stability of metal terminal and casing, makes participating in of power stably peg graft in electricity section, can also provide good supporting role for the wiring section, makes things convenient for being connected of power cord and wiring section.

Furthermore, the bottom of interlude is seted up at least one through-hole.

Through adopting above-mentioned technical scheme, when plastic injection moulding, the plastic passes through the inner wall contact of through-hole and spliced eye, and then fixes metal terminal in the spliced eye, prevents that metal terminal from rotating in the spliced eye, improves the structural stability of plug inner tower.

Furthermore, the middle section is provided with at least one limiting block at one side connected with the wiring section, the shell is provided with a limiting ring at an opening at one side of the plug hole, and the limiting ring is provided with a notch groove suitable for the limiting block to be clamped in.

Through adopting above-mentioned technical scheme, when binding post wore to establish in the spliced eye, the stopper card is gone into in the breach groove, can further prevent that metal terminal from rotating in the spliced eye.

Further, the electric terminal is formed by combining at least two electric tabs, and a contraction gap is formed between every two adjacent electric tabs.

By adopting the technical scheme, the electric connection piece has elastic and complete deformation space due to the contraction gap, the electric connection section can be conveniently and quickly inserted into the plug hole, meanwhile, the electric connection section can be made to be fully abutted against the shell and the power supply pin, and the good conductivity of the inner frame of the plug is ensured.

Furthermore, one end of the electric connector, which is far away from the middle section, is provided with a flange extending outwards.

By adopting the technical scheme, the opening at one end of the electric connection section, which is far away from the middle section, is enlarged by the flanging, so that the pin can be conveniently and smoothly inserted into the electric connection section to realize positioning.

Furthermore, be equipped with at least one sand grip on the inside wall of connection section, each the length direction of sand grip is the global extending direction of connection section, the lateral wall of connection section is in sand grip department corresponds is equipped with the recess.

Through adopting above-mentioned technical scheme, sand grip and recess can increase the structural strength of wiring section, avoid the wiring section to take place to warp when connecting the power cord and influence the connection effect between them.

Furthermore, the wiring section includes adapting portion and two wire clamping parts, the one end of adapting portion with the interlude links to each other, two wire clamping parts are vertical to be connected in the relative both sides of adapting portion and be suitable for to the adapting portion inboard is turned over and is closed up.

By adopting the technical scheme, the bearing part is used for supporting the power line, the wire clamping part is folded towards the inner side of the bearing part and can clamp the power line, so that the power line is stably connected with the wire connecting section, and the novel power line connector has the characteristics of simple structure and convenience in connection.

Further, the casing includes the plug bush and establishes the annular end in plug bush one end, annular end is equipped with at least one constant head tank along the anchor ring.

Through adopting above-mentioned technical scheme, when plastic injection moulding, the effective location of the casing of being convenient for is carried out in the setting of annular end and constant head tank to the plastic of being convenient for effectively dashes glues.

The utility model also provides a power plug, including foretell plug inner tower. The power plug and the plug inner frame have the same advantages compared with the prior art, and the detailed description is omitted.

Drawings

Fig. 1 is a schematic structural view of an inner plug frame according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of an inner plug frame according to an embodiment of the present invention;

fig. 3 is an exploded view of an inner frame of a plug according to an embodiment of the present invention;

fig. 4 is a schematic view of an internal structure of a metal terminal according to an embodiment of the present invention.

Description of reference numerals:

1-a shell; 11-inserting sleeve; 12-a ring-shaped tip; 121-positioning grooves; 122-positioning holes; 123-a limit ring; 124-a notch groove; 2-a metal terminal; 21-an electrical junction; 211-electrical tabs; 212-shrink gap; 213-flanging; 22-an intermediate section; 221-film blocking; 222-ring hole; 223-through holes; 224-a stop block; 23-a wire connection section; 231-convex strips; 232-groove; 233-a receiving part; 234-a wire clamping part; 3-inserting holes; 4-mounting holes; 41-glue punching cavity; 42-conductive cavity.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", and the like in the embodiments indicate terms of orientation, and are only used for simplifying the description of positional relationships based on the drawings of the specification, and do not represent that the elements, devices, and the like indicated in the description must be operated according to specific orientations and defined operations and methods, configurations, and such terms of orientation do not constitute limitations of the present invention. In the embodiments, the references to "inner" and "outer" refer to the inner side of the case and the outer side of the case with respect to a chamber structure, such as a case.

In addition, the embodiment of the present invention is provided with coordinate system XYZ in the drawings, wherein the forward direction of the X axis represents the front side, the reverse direction of the X axis represents the rear side, the forward direction of the Y axis represents the right side, the reverse direction of the Y axis represents the left side, the forward direction of the Z axis represents the upper side, and the reverse direction of the Z axis represents the lower side.

The embodiment of the utility model provides a power plug, including the plug inner tower as shown in figure 1.

With reference to fig. 2, the plug inner frame includes a housing 1 and at least one metal terminal 2, the number of the metal terminals 2 in this embodiment is three, specifically, the plug inner frame is a quincunx tail plug, and in addition, the metal terminals 2 may be one or more according to setting requirements.

Referring to fig. 3 and 4, three insertion holes 3 suitable for three metal terminals 2 to penetrate through are correspondingly formed in the housing 1, and each metal terminal 2 is provided with a mounting hole 4 along the axial direction of the insertion hole 3. The metal terminal 2 is provided with a rubber sheet 221 in the mounting hole 4, the rubber sheet 221 divides the mounting hole 4 into a rubber punching cavity 41 and a conductive cavity 42, the pin of the power supply is suitable for penetrating through the rubber punching cavity 41 and abutting against the inner wall of the rubber punching cavity 41, and the power line is suitable for penetrating through the conductive cavity 42 and abutting against the inner wall of the conductive cavity 42, so that smooth conduction between metal electrons and the pin and the power line is ensured. When the plug inner frame is connected with the power pin, the pin is inserted into the glue punching cavity 41, injection molding and glue punching are performed, the glue blocking piece 221 can block the plastic, and the influence on the conductive function of the metal terminal 2 caused by a large amount of plastic glue punching to the conductive cavity 42 of the metal terminal 2 is avoided.

Meanwhile, the metal terminal 2 is provided with at least one annular hole 222 at the connection position with the film blocking piece 221, and the punching cavity 41 and the conductive cavity 42 are communicated through the annular hole 222. Compared with the prior art, the utility model discloses a setting of annular ring 222 for towards gluey chamber 41 and electrically conductive chamber 42 intercommunication. When the plastic is injection molded, the air extruded in the glue punching cavity 41 can be discharged in time through the annular hole 222, and the glue punching effect of the plastic in the plug inner frame is improved. Therefore, the plug inner frame of the embodiment can promote the metal terminal 2 to be firmly bonded with the pin, and can ensure the excellent conductive function of the metal terminal 2.

Wherein, for the size and the number of the gaps of the ring hole 222, those skilled in the art can use the punching stationThe glue used, the processing parameters of the punching, the thickness of the glue-blocking piece 221, the limit on the amount of glue allowed to pass through the annular hole 222, and other practical conditions are selected accordingly. In this embodiment, the pressure for punching glue is 75-85kg/cm²The annular hole 222 is specifically formed at the top of the metal terminal 2, and the gap distance of the annular hole 222 is smaller than the thickness of the rubber blocking piece 221, so that the metal terminal 2 can be prevented from entering the conductive cavity 42, and air in the rubber punching cavity 41 can be effectively discharged.

The casing 1 comprises an insert sleeve 11 and an annular end 12, wherein the insert sleeve 11 is formed by integrally injection molding three insert cylinders (not shown in the figure), three insert holes 3 correspond to the three insert cylinders one by one, and the insert holes 3 penetrate through the insert sleeve 11 and the annular end 12 along the axial direction of the insert cylinders.

The annular end 12 is a triangular ring integrally formed on the outer side wall of one end of the insert 11, and the annular end 12 is provided with an annular positioning groove 121 along the annular surface thereof. When plastic injection moulding, the effective location of casing 1 is convenient for in the setting of annular end 12 and constant head tank 121 to the plastic of being convenient for effectively dashes glues. The number of the positioning grooves 121 can be increased or decreased as required. The annular end head 12 is further provided with three positioning holes 122 at intervals at the bottom of the positioning groove 121, and the positioning holes 122 are correspondingly arranged on three ring surfaces of the annular end head 12, so that the positioning effect of the housing 1 can be further improved.

Each metal terminal 2 comprises an electric connection section 21, an intermediate section 22 and a wiring section 23 which are connected in sequence, the electric connection section 21 and the intermediate section 22 are arranged in the plug hole 3 in a penetrating mode, the wiring section 23 penetrates out of the plug hole 3, and the adhesive blocking piece 221 is arranged in the intermediate section 22. In the embodiment, the electrical connection section 21 and the intermediate section 22 are inserted into the insertion hole 3, which not only can increase the structural stability of the metal terminal 2 and the housing 1, promote the pins of the power supply to be stably inserted into the electrical connection section 21, but also can provide a good supporting function for the connection section 23, and facilitate the connection between the power supply line and the connection section 23.

At least one through-hole 223 has been seted up to interlude 22's bottom, and when plastic injection moulding, the plastic passes through the inner wall contact of through-hole 223 with spliced eye 3, and then fixes metal terminal 2 in spliced eye 3, prevents that metal terminal 2 from rotating in spliced eye 3, improves the structural stability of plug inner tower. In the embodiment, one through hole 223 is formed, which is enough for plastic to effectively fill the gap between the metal terminal 2 and the housing 1.

At least one limiting block 224 is arranged on one side of each middle section 22 connected with the wire connecting section 23, a limiting ring 123 is arranged at an opening of the annular end 12 on one side of the plug hole 3 far away from the plug bush 11, and a notch groove 124 suitable for the limiting block 224 to be clamped is formed in the limiting ring 123. When the wiring terminal is inserted into the insertion hole 3, the limiting block 224 is clamped into the notch groove 124, so that the metal terminal 2 can be further prevented from rotating in the insertion hole 3. In this embodiment, two limiting blocks 224 are arranged at intervals, and the two limiting blocks 224 are respectively abutted against two opposite side walls of the notch groove 124, so that a good circumferential limiting effect is achieved.

The top of the middle section 22 is further provided with a plurality of reinforcing grooves 225 at intervals, in this embodiment, four reinforcing grooves 225 are provided, and two reinforcing grooves 225 are in a group and are respectively located on two opposite sides of the annular hole 222. The reinforcing groove 225 can increase the surface area of the middle section 22, and when plastic is filled in the gap between the metal terminal 2 and the housing 1, the bonding firmness of the two can be further increased.

The electrical terminal 21 is formed by assembling at least two electrical connectors 211, and a contraction gap 212 is formed between two adjacent electrical connectors 211. The shrinkage gap 212 provides the electrical connector 211 with a deformation space with complete elasticity, so that the electrical connector 21 can be conveniently and rapidly inserted into the plug hole 3, and meanwhile, the electrical connector 21 can be promoted to fully abut against the shell 1 and the pins, thereby ensuring good electrical conductivity of the inner frame of the plug. In this embodiment, the electrical connector 21 is formed by injection molding three electrical connectors 211, which has more excellent elastic deformation performance, and facilitates quick insertion and positioning of the pins with the electrical connector 21 and the electrical connector 21 with the housing 1. Each electrical connector 211 is further provided with an outwardly extending flange 213 at an end remote from the intermediate section 22, the flange 213 providing an enlarged opening at the end of the electrical connector 21 remote from the intermediate section 22 to facilitate the insertion and positioning of the pins of the power source into the electrical connector 21.

The inside wall of the wire connecting section 23 is provided with at least one protruding strip 231, the length direction of each protruding strip 231 is the peripheral extension direction of the wire connecting section 23, and the outside wall of the wire connecting section 23 is correspondingly provided with a groove 232 at the protruding strip 231. In this embodiment, the protruding strip 231 and the groove 232 are provided with two sets at an interval along the axial direction of the inserting hole 3, which can effectively increase the structural strength of the wiring section 23, avoid the deformation of the wiring section 23 when connecting a power line and influence the connection effect of the wiring section and the power line, and have the characteristics of simple structure and excellent reinforcing effect.

The wire connecting section 23 comprises a receiving portion 233 and two wire clamping portions 234, one end of the receiving portion 233 is connected with the middle section 22, and the two wire clamping portions 234 are vertically connected to two opposite sides of the receiving portion 233 and are suitable for being folded towards the inner side of the receiving portion 233, so that the wire connecting section 23 is in a U shape. The socket 233 is used for supporting a power line, and the wire clamping portion 234 is folded towards the inner side of the socket 233 and can clamp the power line, so that the power line is stably connected with the wire connecting section 23.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. A plug inner frame is characterized by comprising a shell (1) and at least one metal terminal (2), the shell (1) is provided with a plug hole (3) suitable for the metal terminal (2) to penetrate through, the metal terminal (2) is provided with a mounting hole (4) along the axial direction of the plug hole (3), the metal terminal (2) is provided with a rubber blocking piece (221) in the mounting hole (4), the rubber sheet (221) divides the mounting hole (4) into a rubber punching cavity (41) and a conductive cavity (42), the pins are suitable for penetrating into the rubber punching cavity (41) and abutting against the inner wall of the rubber punching cavity (41), the metal terminal (2) is provided with at least one annular hole (222) at the joint of the metal terminal and the rubber blocking piece (221), the glue punching cavity (41) is communicated with the conductive cavity (42) through the annular hole (222).

2. The plug inner frame according to claim 1, characterized in that the metal terminal (2) comprises an electrical connection section (21), an intermediate section (22) and a wiring section (23) which are connected in sequence, the electrical connection section (21) and the intermediate section (22) are arranged in the plug hole (3) in a penetrating manner, the wiring section (23) penetrates out of the plug hole (3), and the rubber stopper piece (221) is arranged in the intermediate section (22).

3. The plug inner frame according to claim 2, characterized in that the bottom of the middle section (22) is provided with at least one through hole (223).

4. The plug inner frame according to claim 3, characterized in that at least one limiting block (224) is arranged on one side of the middle section (22) connected with the wiring section (23), a limiting ring (123) is arranged on an opening of the housing (1) on one side of the plug hole (3), and a notch groove (124) suitable for the limiting block (224) to be clamped is formed in the limiting ring (123).

5. The plug inner frame according to claim 2, characterized in that the electrical terminal (21) is formed by combining at least two electrical tabs (211), and a shrinkage gap (212) is formed between two adjacent electrical tabs (211).

6. The plug inner frame according to claim 5, characterized in that the end of the electrical tab (211) remote from the middle section (22) is provided with an outwardly extending flange (213).

7. The plug inner frame according to claim 2, characterized in that the inner side wall of the wire connecting section (23) is provided with at least one protruding strip (231), the length direction of each protruding strip (231) is the peripheral extension direction of the wire connecting section (23), and the outer side wall of the wire connecting section (23) is correspondingly provided with a groove (232) at the protruding strip (231).

8. The plug inner frame according to claim 7, characterized in that the wire connecting section (23) comprises a bearing part (233) and two wire clamping parts (234), one end of the bearing part (233) is connected with the middle section (22), and the two wire clamping parts (234) are vertically connected at two opposite sides of the bearing part (233) and are suitable for being folded towards the inner side of the bearing part (233).

9. Plug inner frame according to claim 1, characterized in that the housing (1) comprises a sleeve (11) and an annular head (12) arranged at one end of the sleeve (11), the annular head (12) being provided with at least one positioning groove (121) along an annular surface.

10. A power plug comprising a plug inner frame according to any one of claims 1 to 9.