CN211045843U

CN211045843U - Safety plug

Info

Publication number: CN211045843U
Application number: CN201922321326.5U
Authority: CN
Inventors: 尚从计
Original assignee: Shanghai Yusheng Enterprise Developing Co ltd
Current assignee: Shanghai Yusheng Enterprise Developing Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-07-17
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to a transmission safety technical field discloses a safety plug, and it includes the power cord and fixes the plug body in power cord one end, be fixed with the inner bag on the plug body, be fixed with two on the inner bag and participate in, the multichannel is located the safety groove between participating in on the inner bag surface. The utility model has the advantages of it is following and effect: the new mechanical structure of this scheme utilization is participated in between two and is seted up the multichannel safety groove, and the safety groove is sunken in the inner bag surface, changes the diameter route of original electric current into tortuous route, has increased the creepage distance between participating in to reduced the possibility of participating in between electric leakage, improved the security of plug, ensured user's life safety.

Description

Safety plug

Technical Field

The utility model relates to a transmission safety technical field, in particular to safety plug.

Background

The plug generally refers to a connector of an electronic product and a plug of an electrical appliance. The domestic AC power plug is the most common plug in life, and has a male connector with a bar shape or a copper plate shape, and is physically inserted into a female connector type power socket with a slot or a concave hole, so that an electric appliance can be electrified. Poor plug and socket is an important cause of electrical fire.

Creepage distance is the shortest path between two conducting parts or conducting parts and equipment protection interface that follow insulating surface and survey, because national standard is all carried out to domestic plug of china, no matter be two hole plugs or three hole plugs, two intervals of participating in are fixed on the plug, creepage distance is fixed promptly, and less creepage distance leads to the insulating distance of plug not enough, produces the electric leakage easily to cause the potential safety hazard to the user.

At present, the chinese patent publication No. CN110544849A discloses a safety plug convenient for plugging, which includes a plug main body, a pin, a stop ring, anti-slip patterns, an elastic push arm, a stressed ball, a positioning spring, and an electrical wire interface, wherein the pin is arranged at the upper end of the plug main body, the stop ring is arranged at the lower end of the pin, the anti-slip patterns are arranged on the plug main body, the elastic push arms are arranged at both sides of the plug main body, the stressed ball is connected to the tail end of the elastic push arm, the positioning spring is connected to the elastic push arm and the plug main body, and the electrical wire interface is arranged at.

Above-mentioned technical scheme is through setting up insulating rubber circle on the contact pin, and protection plug safety sets up anti-skidding line again in the plug main part, and convenient the inserting sets up elasticity in the both sides of plug main part and pushes away wall and atress ball, can push away the arm through pressing down elasticity when preparing to extract the plug, and the help plug is extracted to this reduces the chance that the user touched the contact pin, improves the security of plug. However, in the above solutions, the user still touches the plug when pulling out the plug, and when the plug leaks electricity, the user touches the plug and is easily powered, and the above solutions do not design this.

Therefore, a safety plug is needed to increase the creepage distance, so as to reduce the possibility of plug leakage, thereby improving the safety of the plug.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a safety plug, can increase creepage distance to this reduces the possibility of plug electric leakage, thereby improves the security of plug.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the safety plug comprises a power line and a plug body fixed at one end of the power line, wherein an inner container is fixed on the plug body, two pins are fixed on the inner container, and a plurality of safety grooves located between the pins are formed in the surface of the inner container.

Through adopting above-mentioned technical scheme, seting up multichannel safety groove between two participate in, the safety groove caves in the inner bag surface, changes the diameter route of original electric current into tortuous route, has increased the creepage distance between participating in to reduce the possibility of participating in between the electric leakage, improved the security of plug.

The present invention may be further configured in a preferred embodiment as: the inner wall of the safety groove is provided with a plurality of V-shaped grooves, and the length direction of the V-shaped grooves is the same as that of the safety groove.

Through adopting above-mentioned technical scheme, set up multichannel V-arrangement groove on the inner wall of safety groove to this further increases creepage distance, improves the security of plug.

The present invention may be further configured in a preferred embodiment as: and a flange surrounding the periphery of the pin is fixed on the surface of the inner container.

Through adopting above-mentioned technical scheme, set up the flange in participating in the periphery to this leakproofness and the waterproof nature between improvement participating in and the inner bag, and further increased creepage distance, improved the security of plug.

The present invention may be further configured in a preferred embodiment as: two cables electrically connected with the plug pins penetrate through the power line, a connecting sleeve is fixed between the power line and the plug body, and a through hole located above the two cables is formed in the connecting sleeve.

Because the outermost insulating layer of power cord is for moulding plastics the formation, through adopting above-mentioned technical scheme, set up the through-hole on the connecting sleeve, be convenient for compress tightly the cable at the in-process of moulding plastics, avoid the skew of cable to influence the moulding plastics of power cord to be convenient for process reduces the defective rate of product.

The present invention may be further configured in a preferred embodiment as: the cable wraps the outer insulating layer in the power cord and wraps up a plurality of inner cores that are used for electrically conducting in the outer insulating layer, wear to be equipped with the strengthening rib of multichannel along outer insulating layer week side evenly distributed on the outer insulating layer.

Through adopting above-mentioned technical scheme, penetrate the strengthening rib at the outer insulating layer, the strengthening rib encircles a week, plays the guard action to the inner core to improve the anti-cutting performance of outer insulating layer, ensure the insulating nature of inner core.

The present invention may be further configured in a preferred embodiment as: the strengthening rib includes the vulcanized fibre paper that multistage head and the tail were held up, just the vulcanized fibre paper is the tubulose.

By adopting the technical scheme, the reinforcing ribs are formed by utilizing the tubular vulcanized fiber paper, the vulcanized fiber paper has excellent elasticity, wear resistance, corrosion resistance, heat resistance, mechanical strength and insulating property, is light in weight, and can improve the strength of the cable without increasing the weight of the cable; the end-to-end connection mode can increase the compressive strength of the cable and meanwhile can be bent, and the practicability is good.

The present invention may be further configured in a preferred embodiment as: the inner core comprises an inner insulating layer and a plurality of conductive wires, and the surface of each conductive wire is coated with a PE film.

By adopting the technical scheme, the conductive wires are coated with the thin films, and the thin films are utilized to separate the conductive wires, so that the mutual interference among the conductive wires is reduced, and the transmission of electric power is facilitated.

The present invention may be further configured in a preferred embodiment as: the outer surface of the inner insulating layer is coated with isolation paper for isolating the inner core from the outer insulating layer.

By adopting the technical scheme, the inner core and the outer insulating layer are isolated by the isolating paper, and the outer insulating layer is required to be molded in order to coat the inner core, so that the outer insulating layer is prevented from being adhered to the outer surface of the inner insulating layer due to the design of the isolating paper, and the cable is well-arranged.

The present invention may be further configured in a preferred embodiment as: wedge-shaped bulges are fixed on two sides of the plug body.

By adopting the technical scheme, the wedge-shaped bulge is utilized to facilitate the user to take the plug from two sides of the plug, so that the situation that the fingers of the user are close to the pins is avoided, the possibility that the user suffers from electric leakage of the pins is reduced, and the safety of the user is further ensured.

To sum up, the utility model discloses a following at least one useful technological effect:

1. according to the scheme, the plurality of safety grooves are formed between the two pins and are sunken on the surface of the inner container, the diameter path of the original current is converted into a zigzag path, and the creepage distance between the pins is increased, so that the possibility of electric leakage between the pins is reduced, the safety of the plug is improved, and the life safety of a user is ensured;

2. according to the scheme, the flange is arranged on the periphery of the pin, so that the sealing property and the waterproof property between the pin and the inner container are improved, the creepage distance is further increased, and the safety of the plug is improved;

3. the wedge-shaped protruding convenient to use person of this scheme utilization takes the plug from plug both sides, has avoided the user finger to be close to participating in to reduced the user and encountered the possibility of participating in the electric leakage, further ensured user's safety.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the overall structure of another view angle of the present invention, for showing the position of the through hole;

fig. 3 is a schematic structural diagram of the cable according to the present invention.

Reference numerals: 1. a power line; 11. a housing; 12. a cable; 121. an outer insulating layer; 122. an inner core; 1221. an inner insulating layer; 1222. a conductive filament; 1223. a film; 13. release paper; 124. reinforcing ribs; 2. a plug body; 21. a cavity; 22. connecting sleeves; 221. a through hole; 23. a protrusion; 3. an inner container; 31. a pin; 32. a safety groove; 321. a V-shaped groove; 33. a flange.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the safety plug disclosed in the present invention comprises a power line 1, a plug body 2 and a connecting sleeve 22. The power cord 1 comprises a shell 11 and two cables 12, wherein the shell 11 is formed by injection molding of PVC materials. The connecting sleeve 22 is located between the plug body 2 and the power line 1 for strengthening the connection therebetween. Referring to fig. 2, the connection sleeve 22 is provided with a through hole 221, the through hole 221 is above the two cables 12, and is used for compressing the cables 12 in the injection molding process of the housing 11, so as to prevent the deviation of the cables 12 from affecting the injection molding of the power line 1.

As shown in fig. 1, the plug body 2 is rectangular, and has a cavity 21 communicating with the power cord 1, the cavity 21 is filled with the inner container 3, the inner container 3 is made of PT material, has good insulation, and the inner container 3 is tightly fixed with the cavity 21. Two pins 31 are inserted into the inner container 3, one end of each pin 31 extends into the inner container 3 and is electrically connected with the cable 12, the other end of each pin 31 is exposed out of the inner container 3, and a round hole is formed in the exposed end of each pin 31. The periphery of the pins 31 is provided with a flange 33 which is integrally formed with the liner 3, and the flange 33 is used for improving the sealing property and the waterproof property between the pins 31 and the liner 3 and increasing the creepage distance between the two pins 31.

A plurality of safety grooves 32 are formed between the two pins 31, the safety grooves 32 are strip-shaped, the length direction of the safety grooves 32 is consistent with the length direction of the power cord 1, a plurality of V-shaped grooves 321 are further formed in the inner wall of the safety grooves 32, and the length direction of the V-shaped grooves 321 is consistent with the length direction of the safety grooves 32. The safety groove 32 and the V-shaped groove 321 change the original diameter path of current into a zigzag path, so that the creepage distance between the pins 31 is increased, the possibility of electric leakage between the pins 31 is reduced, and the safety of the plug is improved.

The two sides of the plug body 2 are provided with bulges 23, and the bulges 23 are wedge-shaped and are integrally formed with the plug body 2. The design of the protrusion 23 is convenient for a user to take the plug from two sides of the plug, and the fingers of the user are prevented from approaching the pins 31, so that the possibility that the user suffers from electric leakage of the pins 31 is reduced, and the safety of the user is further ensured.

As shown in fig. 1 and 3, the cable 12 includes an outer insulating layer 121 and three inner cores 122, and the three inner cores 122 are uniformly distributed around the axis of the cable 12. The outer insulating layer 121 is coated in the shell 11, is made of a PVC cable material, and has good mechanical property and insulating property. Each inner core 122 comprises an inner insulating layer 1221 and a plurality of conductive wires 1222, wherein the inner insulating layer 1221 is made of vulcanized rubber and has good elasticity, toughness and insulation; in this embodiment, the conductive wire 1222 is a copper wire, so that the inner core 122 has good conductivity. The surface of the conductive filament 1222 is coated with a PE film 1223, which has good insulation resistance performance.

The outer surface of the inner insulating layer 1221 is coated with the isolation paper 13, in this embodiment, the isolation paper 13 is made of aramid fiber paper, which is also called as aramid fiber paper, and the aramid fiber paper is made by using aramid staple fibers and aramid fibrid as paper making raw materials, making the paper into wet-process forming by an inclined wire, and then performing hot press forming. The aramid paper has good flame retardant property and insulating property, so that the flame retardant property of the cable 12 can be improved, and the insulating property of the cable 12 can also be improved. And the inner core 122 is isolated from the outer insulating layer 121 by the isolation paper 13, so that the cable 12 is well-defined, and the outer insulating layer 121 needs to be injection molded to cover the inner core 122, so that the design of the isolation paper 13 also prevents the outer insulating layer 121 from being stuck on the outer surface of the inner insulating layer 1221.

A plurality of reinforcing ribs 124 are arranged on the outer insulating layer 121 in a penetrating manner, and the plurality of reinforcing ribs 124 are uniformly distributed along the circumferential side surface of the outer insulating layer 121. In this embodiment, the reinforcing ribs 124 are formed by abutting multiple sections of vulcanized fiber paper end to end, and the vulcanized fiber paper is tubular. The vulcanized fiber paper has excellent elasticity, wear resistance, corrosion resistance, heat resistance, mechanical strength and insulating property, is light, and can improve the strength and the anti-cutting property of the cable 12, so that the inner core 122 is protected, the insulating property of the inner core 122 is ensured, and the safety of the cable 12 is improved.

When the plug is used, a user only needs to pinch the flanges 33 on the two sides of the plug to take out the plug. Because a plurality of safety grooves 32 are arranged between the two pins 31, the original diameter path of current is changed into a zigzag path, the creepage distance between the pins 31 is increased, the possibility of electric leakage between the pins 31 is reduced, and the safety of the plug is improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a safety plug, includes power cord (1) and fixes plug body (2) in power cord (1) one end, be fixed with inner bag (3) on plug body (2), be fixed with two and participate in (31) on inner bag (3), its characterized in that, the multichannel is located safety groove (32) between participating in (31) has been seted up on inner bag (3) surface.

2. The safety plug of claim 1, wherein a plurality of V-shaped grooves (321) are formed on the inner wall of the safety groove (32), and the length direction of the V-shaped grooves (321) is the same as that of the safety groove (32).

3. A safety plug according to claim 1, characterised in that the inner container (3) is surface-mounted with a flange (33) around the periphery of the pin (31).

4. The safety plug according to claim 1, wherein two cables (12) electrically connected with the plug pins (31) penetrate through the power line (1), a connecting sleeve (22) is fixed between the power line (1) and the plug body (2), and a through hole (221) positioned above the two cables (12) is formed in the connecting sleeve (22).

5. A safety plug according to claim 4, wherein the cable (12) is wrapped in an outer insulating layer (121) of the power cord (1) and a plurality of inner cores (122) for conducting electricity, the inner cores being wrapped in the outer insulating layer (121), and a plurality of reinforcing ribs (124) are arranged on the outer insulating layer (121) in a penetrating manner and evenly distributed along the peripheral side surface of the outer insulating layer (121).

6. A safety plug according to claim 5, wherein the reinforcing ribs (124) comprise a plurality of lengths of vulcanized paper abutting end to end, and wherein the vulcanized paper is tubular.

7. A safety plug according to claim 5, in which the inner core (122) comprises an inner insulating layer (1221) and a plurality of conductive filaments (1222), each of the conductive filaments (1222) being surface coated with a PE film (1223).

8. A safety plug according to claim 7, in which the outer surface of the inner insulating layer (1221) is coated with a release paper (13) which separates the inner core (122) from the outer insulating layer (121).

9. A safety plug according to claim 1, characterised in that wedge-shaped projections (23) are fixed to both sides of the plug body (2).