JPH0325881B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a light source, and more particularly to an incandescent halogen light bulb, which has a flattened glass outer envelope and whose light bulb body is located on the outer side of the light bulb. a cylindrical part of the envelope and a flattened part forming an extension of said part, through which the electrical termination line extends, and in which the lamp body is supported by a cap or optical element, for example a reflector; Therein, an elastic cylindrical piece is used which fits over the flattened part of the glass envelope to connect the cap or optical element with the bulb body. The device according to the invention is a halogen incandescent lamp of the focused type fixed by mechanical means, the electrical conductor of which is connected directly to the lamp socket, for general or local illumination purposes, such as a halogen reading lamp. It is advantageous when used in the case of reflective lights or light bulbs, which are useful for.

B. Prior Art Various techniques are already known for the same purpose as above. For example, in the arrangement disclosed in GB 1204624, mechanical bonding means are used in conjunction with cement bonding. Installation of the cap itself is extremely complex. This is because, in addition to a rather unstable joining method that relies on special chemicals (cap attachment putty), mechanical engagement and positioning requires the additional work of bending the uneven edges of the metal cap. Because it is needed. Besides the complexity of this method, its disadvantage is that the increased demands posed by halogen incandescent lamps cannot necessarily be met by the heat resistance of the cap joint putty.

In German patent specification DE 2527208, the coupling between the light source and the cap and the precise focusing are solved in a very simple manner. That is, a cylindrical piece of any suitable generatrix is placed snugly over the flattened part of the glass envelope of the bulb body, and the required tightening effect is produced by the elastic deformation of said cylindrical piece. Provided by power. The connection for maintaining the required relative position of the parts is therefore provided by friction between the cylindrical piece and the flattened portion of the glass envelope. The disadvantage of this method is that the connection is not rigid and the bulb body is therefore pulled axially out of the cap against frictional forces, unless the electrical conductor is secured to the corresponding element of the cap by welding or other means. It is a possibility.

C. Problems to be Solved by the Invention It is an object of the present invention to provide a device in which a cap or an optical element can be coupled to a lamp body in a reliable and relatively simple manner without using adhesive bonding methods. be.

N Means for Solving the Problems According to the invention, the object is to form a shoulder in the flat part of the glass envelope, so that an axial displacement of the bulb body does not affect the fixing cylindrical piece. This is achieved by configuring it to be blocked by being provided on the shoulder. This object can also be achieved by providing, instead of a shoulder, a recess in the flattened part of the glass envelope and a corresponding protrusion in the cylindrical piece.

Similarly, the subject of the invention is a light source, primarily a halogen incandescent lamp, which has a flattened glass envelope, the bulb body of which is provided on the outside by a cylindrical part of the glass envelope and as an extension thereof. a flattened portion of the glass envelope and electrical termination wires leading out from the flattened portion, and the bulb body is fitted over the flattened portion to connect the cap or optic. fixed to the cap or optical element by means of a resilient cylindrical piece connected to the element and preventing the glass envelope from moving axially relative to said cylindrical piece and against which said cylindrical piece can abut; A shoulder is provided on the bulb body at the end of the flattened portion of the glass envelope, at which the electrical termination line is led out. According to the invention, the bulb body of the light source is provided by two fixing tabs by bending them outwards from the wall of said cylindrical piece and - during assembly - of the fixing tabs. The two sides of the cylindrical piece previously connected to the cap or optical element are compressed by the fixing protrusion from the direction, and the glass envelope of the bulb body is flattened within the cylindrical piece thus compressed. The part is inserted and then fixed to the cap or to an optical element, for example a reflector, in such a way that the compressive force is released after the shoulder has passed through the cylindrical piece.

When forming the shoulder, it is recommended to form the shoulder on one side of the flattened portion of the glass envelope, or preferably on both narrower sides.

The shoulder must be raised to meet mechanical requirements, but it is recommended that the shoulder be two-thirds the height of the flattened portion of the glass envelope.

The width of the shoulder (i.e. the height at which the shoulder should protrude from the surface of the flattened part of the glass envelope) is determined by the difference between the dimensions of the cylindrical piece and the flattened part of the glass envelope, as well as the elastic deformation of the cylindrical piece. It should preferably be chosen between 0.15 mm and 0.30 mm.

The invention will be explained in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings.

E. Example In FIGS. 1 and 2, a 12V20W halogen reading light bulb has a light bulb body 1 having an outer envelope made of Vycor or hard glass, and is composed of a cylindrical portion 2 and a flattened portion 3. It is shown as having an electrical terminal 4,5 and including electrical termination wires 4,5. Flattened portion 3 of the glass outer envelope
are formed with shoulders 7, 70, on which a cylindrical piece 6 rests, the cylindrical piece 6 being connected to a reflector 8; The cylindrical part 6 is fixed by riveting the fixing protrusions 10, 11 integrally formed therewith to the reflecting mirror 8, and then the side of the cylindrical part 6 is fixed from the direction of the protrusions 10, 11. After pressing the part to give it an oval shape, the rectangular flat part 3 is inserted into the cylindrical piece 6 from the inside of the reflector 8. The cylindrical piece 6 is deformed by special tools to such an extent that the shoulders 7, 70 can pass through the cylindrical piece 6 without creating excessive mechanical stresses. Shoulders 7, 7
0 passes through the cylindrical piece 6, the compressive force is released, and the cylindrical piece 6 therefore regains its cylindrical shape and abuts on the shoulders 7, 70 to firmly hold the flattened part 3. encloses and guarantees its required axial position. A displacement of the lamp body 1 in the opposite direction is prevented by the cylindrical part 2 of the glass envelope abutting the reflector 8. The figure shows the situation before the halogen reading bulb is inserted into the socket 9. If the shoulders 7, 10 were not present, attempting to insert the bulb incorrectly into the socket 9 would result in the electrical termination wires 4, 5 failing to fit into the corresponding holes in the socket 9; It can easily be seen that the bulb body 1 is pushed out of the cylindrical piece 6 or the reflector under the effect of the applied pressing force.

In FIGS. 3 and 4, an arrangement essentially similar to that described above is shown in this case at shoulders 7, 70.
Instead, the flattened portion 3 includes, at the same time as flattening,
Recesses or notches 12, 13 are also formed and, during assembly, the pre-segmented cylindrical piece 6 is compressed in the recesses or notches 12, 13, thereby ensuring proper positioning of the bulb body 1. Shown as different.

With said arrangement, therefore, in the case of a light source according to the invention, a firm fixation between the cap or optical element and the bulb body is ensured by purely mechanical means and is not possible in the case of the light source according to the invention. It is significantly simpler and more reliable than the previously described methods, making all other bonding techniques completely unnecessary.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view of a halogen reading bulb with a bulb body provided with a shoulder; Figure 2 is a side view of the halogen reading bulb of Figure 1; Figure 3 is a notch in the bulb body. A vertical sectional view of a halogen light bulb; FIG. 4 is a side view of the halogen light bulb of FIG. 3. In the drawing, 1 is the "bulb body"; 2 is the "cylindrical part"; 3 is the "flattened part"; 4 and 5 are the "electrical termination wires"; 6 is the "cylindrical piece"; 7 and 70 are the "shoulders"Department';10,
11 is a "fixed protruding piece"; 12 and 13 are "notches";
9 indicates "socket".

Claims (1)

[Scope of Claims] 1. A light source having a flattened glass envelope, which is primarily a halogen incandescent lamp, the bulb body of which forms a cylindrical part which is the outer part of the glass envelope, and an extension of said part. It consists of a flattened part,
An electrical termination wire extends through the flattened portion, the bulb body is supported by a cap or an optical element, such as a reflector, and the flattened portion of the glass envelope is used to secure the cap or optical element to the bulb body. Where a snap-on elastic cylindrical piece is used: at the end of the flattened part 3 of the glass envelope on the side of the electrical termination conductors 4, 5 there are shoulders 7, 7;
A light source characterized in that it has 0. 2. In the light source according to claim 1:
A light source characterized in that it has shoulders 7, 70 formed on the narrower side of the flattened portion 3 of the glass envelope. 3. In the light source according to claim 1:
The height of the flattened portion 3 of the glass outer envelope is at most 2/
A light source characterized in that it has shoulders 7, 70 extending up to 3. 4. In the light source according to any one of claims 1 to 3, the light source has shoulder portions 7, 70 protruding from the surface of the flattened portion 3 of the glass envelope by 0.15 mm to 0.30 mm. A light source characterized by: