CN208045794U - Safety plug for small household appliances - Google Patents

Abstract

The utility model discloses a kind of safety plugs for small household appliances, for solving Problem of Failure caused by the heating of plug inside thermal accumlation.He includes injection molding body and the electrode slice, the cable that are wrapped in injection molding body, the electrode slice is located in the socket of injection molding body, the cable carries out soldering with electrode slice and connect, it is characterized in that, a lateral air duct and vertical secondary air duct are provided in the injection molding body, wherein, an air duct is evenly distributed in the injection molding body around electrode slice, and the secondary air duct is located at injection molding body portion of the handle.The utility model in plug inside by being arranged heat dissipation channel, after heat is generated at plug pole piece, can be rapidly performed by distributing for heat by heat dissipation channel, reduce accumulated heat, improve the service life of plug, ensure the normal operation of electric current at plug.

Description

Safety plug for small household appliances

Technical field

The utility model is related to small household appliances plug technical field.

Background technology

In the technical fields such as small household appliances technical field, such as various electric cookers, soy bean milk making machine, electric pressure cooking saucepan, electric vehicle, For the sake of security, it is often used concave plug.The concave plug refers to that three electrode slices are hidden in plug Portion, it can effectively prevent water, oily pollution plug in this way, and ensure the personal safety of user.It is corresponding, in electric cooker etc. The socket used on the bottom of a pan is evagination, can be with this progress socket joint cooperation.

Existing concave plug has a defect：Heat-sinking capability is insufficient, and applicant passes through the study found that since concave is inserted Head internal temperature in the growth with plug usage time, temperature can with higher and higher, and in plug temperature raising, due to Concave plug is integrally wrapped by, so without effective heat dissipation channel, can only be accumulated in plug inside, temperature Increasing can make the electrode slice in plug that thermal deformation occur, and can influence the cooperation tight ness rating with socket, or even electric spark occurs and shows As this is more obvious in the electric appliances such as powerful electric cooker, electric baking pan.This phenomenon can not only influence making for internal component With performance, the service efficiency of each component is reduced, or even the performance of entire plug can be caused to decline, finally influences plug Working efficiency in addition it is serious be possible to cause fire.Therefore, there are wretched insufficiencies for the structure of existing plug heat dissipation, have Necessity is improved.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides a kind of safety plug, for solving and improving plug Security performance.

Technical solution is used by the utility model solves its technical problem：

Safety plug, including injection molding body and the electrode slice, the cable that are wrapped in injection molding body, the electrode slice are located at injection molding body Socket in, the cable and electrode slice carry out soldering and connect, which is characterized in that lateral one is provided in the injection molding body Secondary air duct and vertical secondary air duct, wherein an air duct is evenly distributed in the injection molding body around electrode slice, described Secondary air duct is located at injection molding body portion of the handle.

Further, embedded glass fiber in an air duct, and glass fibre other end cantilever is in secondary air duct In.

Further, the injection molding body includes an injection molding body and secondary injection plastomer.

The safety plug is concave plug.

Embedded flexibility Heat Conduction Material in air duct, and flexible Heat Conduction Material other end cantilever is in secondary air duct.

The flexibility Heat Conduction Material is silicon rubber or blown rubber with heat conductivility.

The insertion end of the safety plug is from distal end to the gradual increased taper type of cable end.

One of sealed silicon cushion rubber is nested on the safety plug.

The utility model has the beneficial effects that：

The utility model is logical by radiating after heat is generated at plug pole piece by the way that heat dissipation channel is arranged in plug inside Road can be rapidly performed by distributing for heat, reduce plug inside accumulated heat, make up plug and jack gap reduce bring it is unfavorable It influences, plug and socket gap reduce, and can effectively improve the cleaning inside degree of jack, improve the service life of plug, ensure The normal operation of electric current at plug.

Description of the drawings

Fig. 1 is the stereogram of plug.

Fig. 2 is the full sectional view of plug.

Fig. 3 is the usage state diagram of plug.

Fig. 4 is usage state diagram of the plug on electric cooker.

Fig. 5 is the structure chart of embodiment two.

Fig. 6 is the structure chart of embodiment three.

Fig. 7 is the structure chart of example IV.

In figure：100 injection molding bodies, 110 air ducts, 120 secondary air ducts, 200 electrode slices, 300 cables, 400 glass fibres Silk, 410 flexible Heat Conduction Materials, 420 sealed silicon cushion rubbers, 000 electric cooker.

Specific implementation mode

The utility model research difficult point be how heat dissipation performance is carried out in the case where not changing original plug size Raising, original plug size be national standard size, corresponding size change cannot be carried out.The structure of the utility model changes Into the plug pattern suitable for electrode slice indent.Due to this kind of pattern plug when in use, be covered by socket completely, with The extension of service life, especially when electric current is larger, the resistance of electrode slice contact site is larger, easily generates heat, be easy to cause Temperature build, there are security risks, so the importance of heat dissipation performance is especially prominent.

Embodiment one

Referring to figs. 1 to Fig. 3, plug includes injection molding body 100 and the electrode slice 200, the cable 300 that are wrapped in injection molding body, note Plastomer is the non-conductor of heat, so being easy in injection molding body inner accumulation heat, that is to say, that the heat inside injection molding body is very What hardly possible discharged outward.According to traditional handicraft, injection molding body 100 includes an injection molding body and secondary injection plastomer, and electrode slice is three pieces, point Not Wei electrode film, auxiliary electrode piece and ground connection pole piece, above-mentioned electrode slice generally use Copper alloy material, have heating resistor it is small The characteristics of, cable is three, corresponding to be connect with three electrode slices progress solderings.Electrode slice and pad therein are hairs The concentration position of heat, that is to say, that resistance heat is mainly accumulated here.In traditional plug, the heat of accumulation leads to electricity Steep temperature rise at pole piece, the electrode slice after heating occur small thermal deformation, are unfavorable for Electrical Safety.

Injection molding body, it is internally positioned, it is used for fixed electrode film, is attached after three electrode slice welding and with cable, Then secondary mold molding is carried out, during two injection molding bodies are molding, by mold design, is formed in secondary injection plastomer horizontal To an air duct 110 and vertically arranged secondary air duct 120, wherein a duct dimension is smaller, and be evenly distributed in note In plastomer so that injection molding body plug portion forms porous structure, and secondary air duct is located at portion of the handle, has transparent lead to Road, and the presence of secondary air duct can form finger at top and bottom and pinch and hold place, be conducive to exert a force, especially apply pulling capacity. Under conventional sense, by the setting in air duct, the heat of plug inside can be timely taken away, it is tired to avoid generating temperature here Meter.

After the completion of injection molding, in an air duct 110, it is embedded in rubber bar 111 close to insertion end end, it is blocked, And melting fusion is carried out, it is formed and is blocked, there is certain waterproof effect, one time air duct forms blind hole form, that is to say, that primary Air duct is merely able to link up by secondary air duct and the external world, and extra heat is also merely capable of through an air duct and Secondary Air It radiates outward in road.

Meanwhile even if in the case of severe, moisture will not be by an air duct and secondary air duct to the end of plug It immerses, effectively prevent the generation of electrocution conditions.

In use, this plug is inserted at the jack of corresponding electric cooker 000, you can normal use.The utility model Plug portion volume does not increase, and has very practical value.

In the present embodiment, the insertion end of plug is designed as taper, itself has certain gradient, that is to say, that is inserted into End is small end, is gradually increased to cut cable, while by the socket design of socket at bell mouth shape, that is, the sample with plug cooperation Formula, this structure can form even closer cooperation, and bad place is, after forming tight fit, between plug and jack Mistake tight fit heat dissipation channel is obstructed, internal temperature accumulation can be given out by the heat dissipation wind channel of the utility model It goes, forms good heat dissipation effect.That is, the mechanism design of the present embodiment, between can making between plug and jack Gap smaller.

Embodiment two

With reference to figure 5, in the present embodiment, embedded glass fiber 400, glass fibre in an air duct can be formed and be led The passage of heat so that the heat of plug inside can be exported along glass fibre, and be distributed at secondary air duct.

Meanwhile secondary air duct is vertically arranged, after having moisture to enter secondary air duct, can quickly be leached from downside, no It can be in inner accumulation.

Embodiment three

With reference to figure 6, in the present embodiment, the embedded flexibility Heat Conduction Material 410 in an air duct, such as with heat-conducting effect Silicon rubber and blown rubber, and wherein filling alumina particle either aluminium oxide, magnesia and boron nitride mixing Grain has good heat conductivility, while also having good insulating effect.It will be in an air duct by flexible Heat Conduction Material Heat conducts to be distributed in recessed secondary air duct, secondary air duct be it is vertically arranged, can be by heat using hot-air convection principle Quickly distributed.

Example IV

As Fig. 7 increases by one of sealed silicon cushion rubber 420, pass through setting for sealed silicon cushion rubber 400 on the basis of embodiment one It sets, the gap between plug and jack can be protected, this structure design pair and the heat dissipation of plug have an adverse effect, But for keep jack inside cleaning generate Beneficial Effect, then through this embodiment in primary, secondary heat dissipation wind channel, can To make up the heat dissipation brought adverse effect.On the whole, the heat dissipation effect of the present embodiment is still superior to traditional plug and jack Design.

The sealed silicone snare is set on plug, while being fitted in the outer surface of jack, the seam between plug and jack Gap is blocked and is protected.

Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, relevant technical staff in the field is to this The various modifications of utility model and improvement should all expand in the protection domain as determined by the utility model claims book.

Claims (8)

1. for the safety plug of small household appliances, including injection molding body and the electrode slice, the cable that are wrapped in injection molding body, the electrode slice In the socket of injection molding body, the cable carries out soldering with electrode slice and connect, which is characterized in that is arranged in the injection molding body There are a lateral air duct and vertical secondary air duct, wherein an air duct is evenly distributed in the note around electrode slice In plastomer, the secondary air duct is located at injection molding body portion of the handle.

2. the safety plug according to claim 1 for small household appliances, which is characterized in that embedded glass in an air duct Glass filament, and glass fibre other end cantilever is in secondary air duct.

3. the safety plug according to claim 1 for small household appliances, which is characterized in that insertion is soft in an air duct Property Heat Conduction Material, and flexible Heat Conduction Material other end cantilever is in secondary air duct.

4. the safety plug according to claim 3 for small household appliances, which is characterized in that the flexibility Heat Conduction Material is tool There are the silicon rubber or blown rubber of heat conductivility.

5. the safety plug according to claim 1 for small household appliances, which is characterized in that the injection molding body includes primary note Plastomer and secondary injection plastomer.

6. the safety plug according to claim 1 for small household appliances, which is characterized in that the safety plug is concave Plug.

7. the safety plug according to claim 1 for small household appliances, which is characterized in that the insertion end of the safety plug For from distal end to the gradual increased taper type of cable end.

8. the safety plug according to claim 1 for small household appliances, which is characterized in that be nested on the safety plug One of sealed silicon cushion rubber.