RU6473U1 - ELECTRIC ADAPTER - Google Patents

Abstract

1. An electric adapter comprising a housing with three holes for current-supplying and grounding contacts and two contacts, each of which contains a base with a pin and two petals located on it, characterized in that the contact base has a trapezoid shape, the petals are located on the sides of the trapezoid and have an arcuate portion adjacent to the base of the contact and forming an acute angle with it and a flat portion forming an obtuse angle with the arcuate, holes for current-carrying contacts are in the form of a combination of the legs and the circumference of the circle, conjugated in obtuse corners of the trapezoid, with large bases of the trapezoid oriented to the center of the body, and on the walls of the holes passing along the bases of the trapezoid, made stops for knife contacts. The adapter according to claim 1, characterized in that the stops for the knife contacts are made in the form of a hole wall located at an angle to the axis of the hole. The adapter according to claim 1, characterized in that it contains limiters for the stroke of the petals. 4. The adapter according to claims 1 and 3, characterized in that the limiters of the petals are made in the form of a section of the housing, concave inward, and a strap placed inside the housing. The adapter according to claim 1, characterized in that the hole for the grounding contact is conical. The adapter according to claim 1, characterized in that the male part of the body is made in the form of a cylinder truncated along the chord, and the socket part has a mating hole for accommodating the male part. The adapter according to claim 1, characterized in that it comprises a contact rotation limiter made in the form of a protrusion on the inner wall of the fork part of the housing.

Description

Electric adapter

The utility model relates to the field of electrical engineering and can be used when connecting to electrical networks of household and professional electrical appliances. Suggested electrical adapter

allows you to connect an appliance with a plug of the same standard to an outlet

another standard.

Known electrical adapter (international application WO 93/11588, publ. 10.06.93, H 01 R 31/06, 27/00), which allows, in particular, to connect a three-pin plug of the UK standard to European or US standard sockets. The adapter includes a housing with platforms for the user's fingers, a set of contacts for receiving contact pins and a set of contacts

H 01R 31/06

to connect to an outlet. In the socket and male part of the housing, holes for contacts are made. Three holes for contacts are made in the Viloca part of the case, two of which are designed to accommodate US standard knife contacts in them, as well as for pins of circular cross-section made according to the European standard. Such holes have a shape formed by a composition of two geometric shapes - a trapezoid and a circle. The circle mates with the trapezoid in the obtuse corners of the trapezoid. As necessary, knife contacts or pins that extend into the indicated holes are pulled out of the adapter body. The described device does not allow you to connect the plugs of various standards to one outlet.

As a prototype, we selected an adapter according to French application No. 2674379, published on 09/25/92. The adapter contains a housing with three sockets for current-supplying and grounding contacts and two contacts, of which contains a base with a pin and two petals located on it.

The prototype adapter is prefabricated and consists of plug and socket parts, each of which meets the necessary standard and is an independent product. An adapter designed for each specific case is assembled from a set of plug elements and a set of socket elements. An adapter assembled, for example, for connecting a plug of a European standard and containing two round holes for current-carrying contacts and one hole for a grounding contact cannot serve for connecting knife contacts or cylindrical contacts made according to the Russian standard.

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Thus, the disadvantage of the prototype is the impossibility of its use for alternately connecting to the network of European and Russian forks with cylindrical contacts and an American fork with knife contacts without disassembling and assembling operations, which is extremely inconvenient.

In developing this utility model, the goal was to expand the arsenal of tools designed to connect electrical appliances made according to various standards to a particular network.

The inventive electrical adapter contains a housing with three holes for current-supplying and grounding contacts and two contacts, each of which contains a base with a pin and two petals located on it.

The inventive eletric adapter differs from the prototype in that the contact base has a trapezoid shape, the petals are located on the sides of the trapezoid, and have an arched section adjacent to the contact base and forming an acute angle with it and a flat section forming an obtuse angle with an arcuate. The holes for the current-carrying contacts are in the form of a combination of a section of a trapezoid and a section of a circle conjugated in obtuse corners of the trapezoid. The large base of the trapezoid faces the center of the adapter housing. On the walls of the holes passing along the bases of the trapezoid stops are made for fixing knife contacts.

It is advisable to make an emphasis for fixing the knife contacts in the form of a hole wall located at an angle to the axis of the hole. At an angle to the axis

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holes can be located as the entire wall, which is in contact with the plane of the knife contact, and its separate section.

To achieve good contact, between the petals and the cylindrical or knife contact covered by them, and also for their good fixation relative to each other, on the adapter case, petal stroke limiters are made.

The limiters of the movement of the petals can be made in the form of a section of the housing concave inward on one side and a bar placed inside the housing on the other side of the axis of contact. The inwardly concave portion of the body is also a place to accommodate the user's finger. It is most convenient to use an adapter on the case of which, in addition to the indicated concave section, two more concave sections are made inside the case to accommodate the user's fingers.

The hole for the grounding contact is expediently made conical. Such an opening facilitates the procedure for connecting a plug with an earthing contact to the adapter.

To prevent the parts of the housing from turning relative to each other, the male part of the body can be made in the form of a cylinder truncated along the chord, and the socket part can have a corresponding opening for accommodating the male part.

To prevent rotation of the contacts about its axis, a protrusion can be made on the inner wall of the fork of the housing.

Figure 1 - Electric adapter. View from above.

Figure 2 - Electric adapter. Side view.

Fig.Z - Electric adapter. View from the outlet.

Figure 4 - Section aa. An emphasis for fixing a knife contact.

Figure 5 - Male part of the adapter housing with contact petals.

6 - Socket of the adapter housing. Lengthwise cut.

7 - Plug part of the adapter housing with contacts. Section BB.

Fig. 8 shows a socket part of an adapter case. Internal organization.

Figure 9 - The base of the contact. Section B-B.

FIG. 10 - Plug part of the adapter housing. Section GG.

Concrete example

An electrical adapter designed for alternately connecting into a socket made according to the Russian standard, plugs made according to European, Russian (cylindrical contacts) and American (knife contacts) standards is shown in Figs. 1, 2, 3. The adapter contains a cylindrical-shaped receptacle 1 with a diameter of 33 mm, male part 2 and contacts 3 mounted on the male part. The fork part 2 is placed in the mounting hole of the socket part 1 and is attached to it with a self-tapping screw 4. To prevent the parts 1 and 2 from turning relative to each other, a chord cut is made on the fork part, shown in Fig. 5, and there is a corresponding step inside the socket shown in FIG. On the outlet part 1 there are two holes 5 of complex shape for

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current-carrying contacts and a conical hole 6 for grounding contact. On the walls of the holes 5 near the center of the adapter, stops 7 for knife contacts are made.

Each contact 3 consists of a pin 8 and two petals 9 located on the base 10 (Fig.5, 7). The base 10 has the shape of a trapezoid (FIG. E).

The device of the outlet part 1 is illustrated in FIG. 6, 8, 10. On the outlet part, the stroke limiters of the petals 9 are made in the form of a concave section 11 of the outlet part and the bar 12. Positions 13 in FIGS. 2, 3, 8 indicate the places for placing the user's fingers. Between the contacts there is a representative of the rotation of the contacts in the form of a protrusion 14 (Fig. 10).

The adapter is used as follows. The adapter plugs into an outlet made according to Russian standards, which can be either ordinary or in-depth, such as in voltage stabilizers for PILOT computers. Next, a plug is connected to the adapter, which can be one of the following standards:

a) Russian plug with cylindrical contacts with a diameter of 4 mm and a distance between the axis of the contacts of 18.5 mm;

b) European plug with cylindrical contacts with a diameter of 4.8 mm and a distance between the axis of the contacts of 18.8 mm;

c) Taiwanese fork with knife contacts with a thickness and height of 1.6 x 6.3 mm, respectively, and a distance of 10.3 mm with contacts of 11.3 mm;

d) American plug with a grounding contact and two knife contacts with a thickness and height of 1.6 x 6.3 mm, respectively, and a distance between the contacts of 11.3 mm;

The cylindrical contours are placed along the arcuate wall of the hole 5 and are tightly clamped between the petals. The presence of an angle between the planes of the petals 9 allows you to place between them the contacts of different diameters. Thanks to the stroke limiters of 11.12 petals, the contacts are tightly clamped by them, which is necessary to create a good electrical connection. The attendants of the petal stroke prevent their extension at the junction with the base. Thus, the mechanical stress is evenly distributed over the lobe. The plug is relatively easy to plug into the adapter and fits snugly there. This improves not only the pure performance of the adapter (good contact, reliability, long life), but also its ergonomic qualities. The user has a feeling of reliability.

When connecting plugs with knife contacts to the adapter, the latter are placed along the walls of the holes on which the stops are made 7. The presence of an angle between the planes of the petals 9 allows you to place a knife contact between them with the height indicated above. The distance X between the stops 7 (FIG. 3) is 12 mm. The stops 7 extend the knife contacts and press them tightly against the petals.

When connecting a plug with a grounding contact to the adapter, the latter finds hole 6 more easily if its diameter at the inlet is slightly larger than the diameter of the contact. Therefore, it is preferable to make the hole 6 for the grounding contact conical.

When using the adapter, knurls may occur, causing the outlet to rotate relative to the male part. This rotation is prevented by a chord cut made on the fork part 2 and a step made in the landing hole of the socket part 1.

When using the adapter, loads can occur that cause the contact to rotate around its axis. To prevent such a turn serves as a protrusion 14.

Claims (7)

1. An electric adapter comprising a housing with three holes for current-supplying and grounding contacts and two contacts, each of which contains a base with a pin and two petals located on it, characterized in that the contact base has a trapezoid shape, the petals are located on the sides of the trapezoid and have an arcuate portion adjacent to the base of the contact and forming an acute angle with it and a flat portion forming an obtuse angle with the arcuate, holes for current-carrying contacts are in the form of a combination of of the cross section of the circle, conjugated in obtuse corners of the trapezoid, with large bases of the trapezoid oriented to the center of the body, and on the walls of the holes passing along the bases of the trapezoid, stops for knife contacts are made.  2. The adapter according to claim 1, characterized in that the stops for the knife contacts are made in the form of a hole wall located at an angle to the axis of the hole.  3. The adapter according to claim 1, characterized in that it contains limiters of the stroke of the petals.  4. The adapter according to claims 1 and 3, characterized in that the limiters of the petals are made in the form of a section of the housing, concave inward, and a strap placed inside the housing.  5. The adapter according to claim 1, characterized in that the hole for the grounding contact is tapered.  6. The adapter according to claim 1, characterized in that the male part of the body is made in the form of a cylinder truncated along the chord, and the socket part has a mating hole for accommodating the male part. 7. The adapter according to claim 1, characterized in that it contains a contact rotation limiter made in the form of a protrusion on the inner wall of the fork part of the housing.