Contact knife type electric switch
Technical field
The utility model belongs to switching technique field, and in particular to a kind of contact knife type electric switch.
Background technology
Electric switch is a kind of common constructional device, and it is mainly made up of contact knife and static contact, due to contact knife with it is quiet
Contact in contact position not having corresponding radiator structure, so cause electric switch radiating more difficult, so long-time is used
When easily cause and burn, so as to affect the stability in use and service life of electric switch, there is certain use potential safety hazard,
So applicability and practicality are restricted.
The content of the invention
In order to solve above-mentioned technical problem, it is good that the purpose of this utility model is to provide a kind of simple structure, stability in use
And the contact knife type electric switch for being not easy to blow.
The technical scheme for realizing the utility model purpose is a kind of contact knife type electric switch, including contact knife and static contact, institute
State static contact to be arranged on fixed contact pedestal, in the fixed contact pedestal heat dissipation cavity is provided with, be provided with the top of the fixed contact pedestal
The heating column being connected with the heat dissipation cavity, is provided with heat conductive silica gel packed layer in the heat dissipation cavity, and the heating column is arranged on
The center of the static contact, in the top surface of the heating column contact plane is provided with, when the contact knife is fastened in the static contact,
The bottom surface of the contact knife is pressed on the contact plane, and in the heating column cavity is provided with, on the contact plane
It is even to be provided with open-work, heat conductive silica gel cylinder is equipped with the cavity with the open-work, it is provided with the top surface of the contact plane
Heat conductive silica gel integument.
Shrinkage pool is provided with the bottom surface of the contact knife, position is provided with the shrinkage pool in the top surface of the heat conductive silica gel integument
The heat conductive silica gel projection that position is engaged, when the contact knife is fastened on the static contact, the heat conductive silica gel projection is pressed on
In the shrinkage pool.
The radiator window being connected with the heat dissipation cavity is provided with the side wall of the fixed contact pedestal.
The fixed contact pedestal, contact plane and heating column are insulating material structure.It is ceramic structure in the present embodiment,
Can be using other insulating materials.
The utility model has positive effect:Simple structure of the present utility model, by heat dissipation cavity coordinate heating column and
Contact plane, substantially increases the heat dispersion of electric switch, so as to be not easy to cause to burn because overheated, stability in use it is good and
Long service life;Be provided with shrinkage pool in the bottom surface of contact knife simultaneously, and be provided with heat conductive silica gel projection, can greatly improve conductive structure with
The contact area of contact knife, so as to substantially increase heat dispersion, and has preferable insulating properties using heat conductive silica gel.
Description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific embodiment and with reference to attached
Figure, is described in further detail to the utility model, wherein:
Fig. 1 is structural representation of the present utility model.
Specific embodiment
(embodiment 1)
Fig. 1 shows a kind of specific embodiment of the present utility model, and wherein Fig. 1 is structural representation of the present utility model
Figure.
See Fig. 1, a kind of contact knife type electric switch, including contact knife 1 and static contact 2, the static contact 2 is arranged on fixed contact pedestal
On 3, heat dissipation cavity 4 is provided with the fixed contact pedestal 3, is provided with the top of the fixed contact pedestal 3 and is connected with the heat dissipation cavity 4
Heating column 5, be provided with heat conductive silica gel packed layer 6 in the heat dissipation cavity 4, the heating column 5 is arranged in the static contact 2
The heart, in the top surface of the heating column 5 contact plane 7 is provided with, when the contact knife 1 is fastened in the static contact 2, the contact knife 1
Bottom surface be pressed on the contact plane 7, be provided with cavity 8 in the heating column 5, uniformly set on the contact plane 7
There is open-work 9, in the cavity 8 with the open-work 9 heat conductive silica gel cylinder 10 is equipped with, set in the top surface of the contact plane 7
There is heat conductive silica gel integument 11.
Shrinkage pool 12 is provided with the bottom surface of the contact knife 1, in the top surface of the heat conductive silica gel integument 11 position and institute are provided with
The heat conductive silica gel projection 13 that the position of shrinkage pool 12 is engaged is stated, when the contact knife is fastened on the static contact, the heat conductive silica gel
Projection is pressed in the shrinkage pool.
The radiator window 14 being connected with the heat dissipation cavity is provided with the side wall of the fixed contact pedestal.
The fixed contact pedestal, contact plane and heating column are insulating material structure.It is ceramic structure in the present embodiment,
Can be using other insulating materials.
Simple structure of the present utility model, by heat dissipation cavity heating column and contact plane are coordinated, and are substantially increased electrical equipment and are opened
The heat dispersion of pass, so as to be not easy to cause to burn because overheated, stability in use is good and long service life;Simultaneously at the bottom of contact knife
Face is provided with shrinkage pool, and is provided with heat conductive silica gel projection, can greatly improve the contact area of conductive structure and contact knife, so as to carry significantly
High heat dispersion, and there are preferable insulating properties using heat conductive silica gel.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need to give all of embodiment
It is exhaustive.And these belong to obvious change that connotation of the present utility model extends out or variation still falls within this practicality
New protection domain.