Patent Application
20230352887
The present disclosure relates to the technical field of sockets, and more particularly, to a safety socket.
In daily life, a large number of sockets are usually set up to facilitate power-on, but children, due to their strong curiosity, are prone to insert foreign objects into the socket holes if they are neglected, thereby causing risks of electric shock.
In order to solve this problem, various safety sockets have appeared on the market, among which, the most basic structure is to set a contact piece of the plughole into a movable contact piece of an elastic structure, the socket can be energized only after pressing the movable contact piece to make it move and be conductive, so as to prevent children from inserting foreign objects into the socket and causing electric shock.
However, there is still a certain risk of electric shock for a safety switch of this type of structure, for example, the width of the foreign object is exactly the same as the standard size of the plughole, or the foreign object is just inserted with force towards the side of the contact piece, which may cause the contact piece to be conductive, thereby causing electric shock.
In view of the deficiencies in the prior art, the purpose of the present application is to provide a safety socket with higher safety, which can effectively reduce the risk of electric shock caused by the insertion of foreign objects into the plughole.
To achieve the above object, the technical scheme adopted by the present disclosure is:
A safety socket, which includes a housing, and at least one set of socket components mounted in the housing; the socket component includes two sets of symmetrically arranged and mutually independent electrical connecting components, the electrical connecting component includes a fixed terminal for electrical connection with an external live wire or a neutral wire, a plughole component, an elastic component that forces the movable contact piece to shift to an inner side of the plughole, and a connecting terminal for dynamically electrically connecting the plughole component and the fixed terminal; wherein the plughole of the plughole component is enclosed by three static contact pieces and one movable contact piece, the connecting terminal includes a static end and a movable end, the movable contact piece includes an insulating portion corresponding to the inner side of the plughole, and a conductive portion located on an outer side, and the conductive portion is electrically connected with at least one of the static contact pieces, when the movable contact piece is reset outward to a standard width position of the plughole, the conductive portion can be in contact and conducted with the static end of the connecting terminal; an insulating pressing rod is movably disposed upwardly on a bottom of the plughole component, a lower portion of the pressing rod is provided with a spring that can elastically lift it up and down, and the lower portion of the pressing rod is connected and fixed with a first end of a lever component, when a top end of the pressing rod is lowered to a standard depth position of the plughole, the movable end of the connecting terminal can be forced to contact and conduct with the fixed terminal through a second end of the lever component.
According to a preferred structure, the plughole component includes a metal base plate, the three static contact pieces are arranged on three sides of the base plate, and the movable contact piece is pivotally connected and electrically conducted with base plate through the conductive portion and is electrically connected.
According to a preferred solution, only the static contact piece located opposite to the movable contact piece is a conductive contact piece, and the movable contact piece and the opposite static contact piece are located at both ends of the plughole in a length direction.
According to a preferred solution, the elastic component includes a rotating shaft vertically arranged and rotatably mounted in the housing, a connecting plate connecting the rotating shaft and the movable contact piece, and a torsion spring sleeved on the rotating shaft and used to provide elastic force for the movable contact piece.
According to a preferred solution, a bottom end of the pressing rod passes downwardly through the first end of the lever component, the spring is sleeved on the pressing rod, and both ends of the spring abut between a bottom surface of the lever component and an inner bottom surface of the housing.
According to a preferred solution, the lever component includes a rotating shaft arranged laterally and rotatably mounted on the housing as a fulcrum, and a lever whose middle portion is fixed to the rotating shaft and rotates with the rotating shaft. Further, the lever is made of insulating material.
According to a preferred solution, the connecting terminal includes a vertical portion and a horizontal portion that are integrally punched and formed, and one end of the vertical portion correspondingly disposed on an outer side of the conductive portion forms the static end, one end of the horizontal portion correspondingly disposed below the fixed terminal forms the movable end, and the movable end is fixed with the second end of the lever component.
According to a preferred solution, protruding contacts for contact and conduction are provided between the conductive portion and the static end, and between the movable end and the fixed terminal.
The beneficial effects of the present application are: when a foreign object is inserted into any plughole of the socket, at the same time, it is necessary to push the movable contact piece outward to the standard plughole width position, and the pressing rod is pressed down to the standard plughole depth, only then the plughole components corresponding to the live wire can be electrically connected, but the probability of meeting the above two conditions at the same time is very low, thereby greatly reducing the risk of electric shock to children; in addition, since the inner side of the movable contact piece is an insulating portion, in the case that the foreign object does not meet the standard plug size, even if the conditions for making the movable contact piece conductive and pressing the pressing rod in place are met at the same time, such as an oblique insertion of a slender foreign object, at this time, if the foreign object only contacts the insulating portion and the pressing rod, it will not cause electric shock, thereby further improving the safety of the socket.
The present disclosure will be described in further detail below with reference to the drawings and specific embodiments.
The present disclosure will be further described below with reference to the drawings:
In this embodiment, a single-plug safety socket is used as an example for description, certainly, the structure of the safety socket is also suitable for a row plug structure, and is applicable regardless of whether it is a two-hole socket or a three-hole socket.
Referring to
Referring to
When the standard plug is inserted into the plughole 100, the standard-sized plug will push the movable contact piece 222 to move outward and make contact and condcuct with the static end 241, and the bottom end of the plug will press down the pressing rod 25, when the plug is inserted downwards in place, the pressing rod 25 forces the movable end 242 to just contact the fixed terminal 21 through the lever component 26, and then the plughole component 22 can be energized. When foreign objects that do not meet the standard plug width and depth are inserted into any plughole 100 of the socket, and when the movable contact piece 222 is pushed outward to the width of the standard plughole 100, and at the same time the pressing rod 25 is pressed down to the depth of the standard plughole 100, only then can the plughole component 22 corresponding to the live wire be electrically connected, however, the probability of meeting the above two conditions at the same time is very low, so the risk of electric shock to children can be greatly reduced; in addition, since the inner side of the movable contact piece 222 is the insulating portion 222a, in the case that the foreign object does not conform to the standard plug size, even if the conditions of making the movable contact piece 222 conductive and pressing the pressing rod 25 in place are met at the same time, such as an oblique insertion of the slender foreign object, at this time, if the foreign object only contacts the insulating portion 222a and the pressing rod 25, it will not cause an electric shock, thereby further improving the safety of the socket.
According to a preferred structure, the plughole component 22 includes a metal base plate 223, the three static contact pieces 221 are disposed on three sides of the base plate 223, and the movable contact piece 222 is pivotally connected to the base plate 223 through the conductive portion 222b and is electrically connected. The base plate 223 has the function of installing and conducting the static contact piece 221 and the movable contact piece 222, the movable contact piece 222 is pivotally connected and electrically conducted with the base plate 223, which can not only ensure the electrical connection between the two, but also make the upper end of the movable contact piece 222 swing back and forth toward the inner side and outside.
According to a preferred structure, only the static contact piece 221a located opposite to the movable contact piece 222 is a conductive contact piece, the movable contact piece 222 and the opposite static contact piece 221a are respectively located at both ends of the plughole 100 in the length direction, and are both electrically connected to the base plate 223. At this time, the two static contact pieces 221b located on both sides in the width direction of the plughole 100 are insulating contact pieces, under these circumstances, the inserted foreign object not only needs to push the movable contact piece 222 and the pressing rod 25 to the width and depth of the standard plughole 100 at the same time, in addition, it is necessary to contact the conductive static contact piece 221a on the opposite side to achieve electrical conduction, the probability that the above conditions can be met at the same time is further reduced, thus the safety of the socket is further improved.
According to a preferred structure, the elastic component 23 includes a rotating shaft 231 vertically arranged and rotatably mounted in the housing 1, a connecting plate 232 connecting the rotating shaft 231 and the movable contact piece 222, and a torsion spring 233 sleeved on the rotating shaft 231 to provide elastic force for the movable contact piece 222. Two ends of the torsion spring 233 abut against the connecting plate 232 and the inner wall of the housing 1 respectively, so as to provide the movable contact piece 222 with an inward elastic force. Certainly, the elastic component 23 is not limited to the present structure, and can also be any existing structure that can provide the movable contact piece 222 with an elastic force to deflect the inner side of the plughole 100, the simplest structure is that the movable contact piece 222 itself has strong resilience, and is deformed to the inner side of the plughole 100 by its own resilience under normal conditions. Alternatively, the elastic component 23 includes a compression spring pressing against the outer side of the movable contact piece 222, or includes a tension spring connected to the inner side of the movable contact piece 222, or the like.
According to a preferred structure, the connecting terminal 24 includes a vertical portion 24a and a horizontal portion 24b that are integrally punched and formed, and one end of the vertical portion 24a correspondingly disposed on an outer side of the conductive portion 222b forms the static end 241, one end of the horizontal portion 24b correspondingly disposed below the fixed terminal 21 forms the movable end 242, and the movable end 242 is fixed with the second end of the lever component 26. Both ends of the connecting terminal 24 are in different positions and have different installation directions, only when both ends are conductive at the same time can the plughole component 22 be electrically connected, thereby avoiding misconnection when subjected to an impact force in the same direction, and having higher safety.
According to preferred structure, protruding contacts 270 for contact and conduction are provided between the conductive portion 222b and the static end 241 and between the movable end 242 and the fixed terminal 21. Since each terminal is likely to generate more heat at the moment of contact and electrification, the protruding contacts 270 are not easily deformed due to heat generation, and the reliability of the electrical connection can still be ensured after long-term use.
The above is not intended to limit the technical scope of the present disclosure, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present disclosure still fall within the scope of the technical solutions of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202221030460.5 | May 2022 | CN | national |
