RU91472U1 - LAMP BASE - Google Patents

Abstract

1. The lamp base, including a metal sleeve coaxially arranged and connected in series, a plastic insulator and a contact made in the form of a cap, as well as a conductive wire connected to the contact and passing inside the metal sleeve and a plastic insulator, at least part of the outer surface of the plastic insulator is made conical, and the metal sleeve and the plastic insulator are interconnected at the end of the plastic insulator of a larger diameter, characterized in that, in m nshey least part of the inner surface of the plastic insulator is conical with a cone angle whose value is between the values of angle equal to the angle of the solution of the outer conical surface of the plastic insulator to less than or equal to 180 °. ! 2. The lamp base according to claim 1, characterized in that the shape and size of the end face of the larger diameter of the plastic insulator in thickness are made with the possibility of ensuring reliable connection with one of the ends of the metal sleeve.

Description

The claimed utility model relates to elements of discharge lighting lamps, in particular, to lamp bases.

Known as the closest analogue lamp base, including coaxially located and sequentially interconnected metal sleeve, a plastic insulator and a contact made in the form of a cap, as well as a conductive wire connected to the contact and passing inside the metal sleeve and plastic insulator, while at least part of the outer surface of the plastic insulator is conical, and the metal sleeve and the plastic insulator are interconnected at the end of the plastic insulator and a larger diameter (China patent for utility model No. 2011160068, class IPC Н01К 1/42, publ. 02.05.2008)

The disadvantage of this cap is the complexity and high complexity of manufacturing a stamp for casting a plastic insulator, which, accordingly, complicates the manufacturing process of the cap and its design.

The technical result that can be obtained in the claimed utility model is the creation of a lamp base that is simpler in its manufacture due to the corresponding implementation of a plastic insulator, which can be made both by casting and mechanical (turning) processing.

The technical result is achieved by the fact that in the lamp base, which includes a metal sleeve coaxially arranged and connected in series, a plastic insulator and a contact made in the form of a cap, as well as a conductive wire connected to the contact and passing inside the metal sleeve and plastic insulator, while at least part of the outer surface of the plastic insulator is conical, and the metal sleeve and the plastic insulator are interconnected at the end of the plastic insulator With a larger diameter, at least a part of the inner surface of the plastic insulator is conical with a cone angle of angle, the value of which is in the range from the angle equal to the angle of the solution of a part of the outer conical surface of the plastic insulator to an angle less than or equal to 180 °. In addition, the shape and size of the end of the plastic insulator of larger diameter in thickness are made with the possibility of ensuring reliable connection with one of the ends of the metal sleeve.

The declared lamp base is illustrated using the drawings shown in figures 1-3.

Figure 1-3 shows the lamp base in longitudinal section, while figure 1 shows a plastic insulator, the inner conical surface of which is made with a cone angle equal to the cone angle of the cone part of the outer conical surface; figure 2 shows a plastic insulator, the inner conical surface of which is made with an angle of cone solution greater than the cone angle of the part of the outer conical surface, but less than 180 °;

figure 3 shows a plastic insulator, the inner surface of which is made with a cone angle of equal to 180 °.

Figure 1-3 adopted the following notation:

- metal sleeve 1;

- plastic insulator 2;

- contact 3;

- the outer surface 4 of the plastic insulator 2;

- the inner surface 5 of the plastic insulator 2;

- conductive wire 6;

- the angle α _{1 of the} solution of the cone of the outer surface 4;

- the angle α _{2 of the} solution of the cone of the inner surface 5.

The declared lamp base includes a metal sleeve 1 coaxially arranged and connected in series with each other, a plastic insulator 2 and a contact 3 made in the form of a cap, as well as a conductive wire 6 connected to the contact 3 and passing inside the metal sleeve 1 and the plastic insulator 2.

The metal sleeve 1 is a thin-walled part, the outer surface of which is a threaded surface. One of the ends of the metal sleeve 1, the upper one, is intended for connection with the bulb of the lamp, and the second, lower one, for connection with the end face of the larger diameter of the plastic insulator 2. The shape and size of the end of the larger diameter of the plastic insulator 2 provide a reliable connection with the lower end of the metal bushings 1. This means that the shape and thickness of the end face of the larger diameter of the plastic insulator 2 are selected in such a way as to ensure a reliable connection with the metal sleeve and to prevent the integrity of the connection thallic bush 1 and plastic insulator 2 when exposed to external load. The shape of the end face of the larger diameter of the plastic insulator 2 can, for example, as shown in FIGS. 1-3, repeat the shape of the threaded surface of the lower end of the metal sleeve 1 for reliable interaction of these two ends.

To significantly simplify the manufacture of the plastic insulator 2, at least part of the inner surface 5 of the plastic insulator 2 is a conical surface with an angle α ₂ of the cone solution, which is in the range from the angle equal to the angle of the solution α ₁ of the outer conical surface 4 of the plastic insulator 2 ( figure 1) to an angle greater than the angle of the cone of the part of the outer conical surface, but less than 180 ° (figure 2). If the angle α ₂ of the cone solution of the inner surface 5 of the plastic insulator 2 becomes 180 °, then the inner surface 5 of the plastic insulator 2 degenerates into a flat end surface, as shown in FIG. 3. In this case, the wall thickness of the plastic insulator 2 either has a constant value from the end with a large diameter to the end with a smaller diameter, if the angle α ₁ of the cone solution of the outer conical surface 4 is equal to the angle α ₂ of the cone solution of the inner conical surface 5, or increases in the direction from the end face with a large diameter to the end face with a smaller diameter, in the event that the angle α _{2 of the} solution of the cone of the inner surface 5 is greater than the angle α _{1 of the} solution of the cone of the outer surface 4 of the plastic insulator 2, but less than 180 °. The closer the angle α ₂ of the cone solution of the inner surface 5 of the plastic insulator 2 to a value of 180 °, the greater the wall thickness of the plastic insulator 2 near the end with a smaller diameter.

The lamp base is made as follows.

The sleeve 1 is made in any known manner, for example by cutting a pipe. Then a thread is rolled on a metal sleeve and, if necessary, a flanging is performed.

The plastic insulator 2 can be manufactured by casting, while the die for casting is quite simple in its manufacture and can be performed using turning. Also, plastic insulator 2 can be made using turning or milling.

Pin 3 is stamped.

An open bell of the cap, in the form of which contact 3 is made, is cut into the end face of the plastic insulator 2 with a smaller diameter.

The end face of the metal sleeve 1 is connected to the end face of the larger diameter of the plastic insulator 2 using a fixing composition, for example, epoxy resin or glue.

A conductive wire 6 is connected to the inner surface of the contact 3 using, for example, conductive enamel.

Thus, due to the fact that at least part of the inner surface of the plastic insulator is a conical surface with an angle of cone angle, the value of which is in the range from the angle equal to the angle of the solution of part of the external conical surface of the plastic insulator, to an angle smaller or equal to 180 °, you can get a simpler plastic insulator in its manufacture, which follows from the possibility of its manufacture by both casting and mechanical (turning) processing. This simplifies the construction of the lamp base and ensures ease of manufacture.

Claims (2)

1. The lamp base, including a metal sleeve coaxially arranged and connected in series, a plastic insulator and a contact made in the form of a cap, as well as a conductive wire connected to the contact and passing inside the metal sleeve and a plastic insulator, at least part of the outer surface of the plastic insulator is made conical, and the metal sleeve and the plastic insulator are interconnected at the end of the plastic insulator of a larger diameter, characterized in that, in m nshey least part of the inner surface of the plastic insulator is conical with a cone angle whose value is between the values of angle equal to the angle of the solution of the outer conical surface of the plastic insulator to less than or equal to 180 °. 2. The lamp base according to claim 1, characterized in that the shape and size of the end face of the larger diameter of the plastic insulator in thickness are made with the possibility of ensuring reliable connection with one of the ends of the metal sleeve.