JPH0332040Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the mounting structure of an outer bulb and a cap used in a halogen light bulb. The engaging tongue piece 3 is formed by notching the side surface of the internal ferrule 1, which has a cylindrical shape with an opening on the upper surface and a bottom. An elastic protrusion 19 for tightening that protrudes outward is formed on the piece 3, an engagement recess 6 is provided on the outer periphery of the outer bulb 5, and the outer bulb 5 in which a halogen light bulb 7 is housed is connected to the inner base 1. the outer valve 5 by inserting it into the outer valve 5 and fitting the engagement protrusion 4 into the engagement recess 6.
The present invention also relates to a mounting structure for an outer valve and a cap, characterized in that an internal cap 1 is attached to an external cap 2.

In the case of a halogen light bulb 7' using a conventional outer bulb 5', the lower opening of the cylindrical outer bulb 5' was simply inserted into the base A' and fixed with adhesive. . Therefore, if the adhesive deteriorates due to the high heat emitted from the halogen bulb 7', if it is exposed to external vibrations, or if the adhesive condition is poor, the outer bulb 5' may fall off during use because there is no physical fixing method. There was an accident like that. Furthermore, when an adhesive is used, the outer bulb 5' and the cap A' must be held together until the adhesive hardens, resulting in poor workability. Therefore, as shown in Utility Model Application Publication No. 49-111189, the cap has a double structure of an internal cap and an external cap, and an engaging protrusion that can protrude inward is provided on the engaging tongue of the internal cap. A method has been proposed in which the engaging protrusion is fitted into an engaging recess formed on the outer periphery of the outer valve to mechanically fix the two, but although this solves the above problem, it still Fixing between the internal cap and the internal cap relies solely on adhesive, and there are problems in that mechanical fixation is not possible, and if the external cap is simply fitted, the engaging tongue piece will not be tightened enough, making the engagement difficult. There also remained the problem that the engagement between the tongue and the outer valve was insufficient.

The present invention was devised in view of the drawbacks of the conventional examples, and its purpose is to be able to physically fix the outer valve and the cap, and also to firmly attach the external cap to the internal cap. Can be fixed to
The purpose of this invention is to provide a mounting structure for the outer valve and the cap that is very simple to fix and has good workability.

The present invention will be explained in detail below. FIG. 1 is an exploded perspective view of a first embodiment of the present invention. Outer valve 5
has a cylindrical shape with a spherical head, an opening at the lower surface, and a groove-shaped engagement recess 6 formed around the entire circumference near the opening at the lower surface. As shown in the figure, the halogen light bulb 7 used in this embodiment is pinch-sealed at the upper end and the center, and has a lower half 8 that is open in the shape of a flap. 10 filaments between 9 foils
has been erected. An external lead rod 12 is led out from the pinch seal portion 11, and an inverted L-shaped energizing rod 13 arranged on the side of the halogen light bulb 7 is connected to the external lead rod 12 at the upper end. There is. The cap A has a double structure of an internal cap 1 and an external cap 2. The internal cap 1 has a cylindrical shape with a bottom, and has an engaging convex portion 4 that bulges inward in an annular shape near the opening edge, and has a threaded portion 14 screwed below the engaging convex portion 4. Furthermore, notch grooves 15 are formed at a plurality of locations extending beyond the engaging convex portion 4 from the opening edge toward the bottom. Here, the portion sandwiched between the notch grooves 15 is referred to as the engaging tongue piece 3. Further, this engaging tongue piece 3 is formed with an elastic protrusion 19 for tightening that protrudes outward (in the figure, it is a cut-and-raised piece, but of course it is not limited to this). ,
When the internal cap 1 is screwed into the external cap 2, the elastic protrusion 19 comes into elastic contact with the inner circumferential surface of the external cap 2 and pushes the engaging tongue piece 3 inward, so that the inner and outer caps 1,
This serves to firmly fix the two together and at the same time increases the tightening force of the outer valve 5.
Even if the distal end portion of the engaging tongue piece 3 is bent or bent outward, the same function can be achieved. The external cap 2 has a cylindrical shape with a bottom, a threaded portion 16 is carved on the side surface, and a contact 17 is provided at the bottom, and a through hole is provided at the bottom of the internal cap 1 in line with the contact 17. 18 are drilled. Here, the outer diameter of the outer valve 5 and the inner diameter of the internal cap 1 are the same, and the outer diameter of the internal cap 1 and the inner diameter of the external cap 2 are the same.

First, adhesive is applied to the bottom of the internal cap 1 to adhere the lower half 8 of the halogen bulb 7, and then the energizing rod 13 is attached to the bottom or bottom of the inner surface of the internal cap 1 by soldering or Weld. After erecting the halogen bulb 7 in the internal cap 1 in this way, push out the engagement tongues 3 of the internal cap 1, insert the outer bulb 5 into the internal cap 1, and insert the outer bulb 5 into the engagement recess 6. The engaging convex portion 4 is inserted. Next, an adhesive is applied to the outer circumference of the internal cap 1 or the inner surface of the external cap 2, and the external lead rod 12, which can be led out from the lower end of the halogen bulb 7, is inserted into the through hole of the contact 17 while the internal cap 1 is connected to the outside. The external lead rod 12 inserted into the contact 17 is soldered or welded, and the remaining portion is cut off. The thus formed halogen light bulb with an outer bulb is used by screwing the base A into a socket.

Furthermore, in this embodiment, the threaded portion 14 is screwed onto the internal cap 1, but the present invention is not limited to this, and a simple cylindrical shape may be used, and the threaded portion 14 may be fixed by adhesive.

As mentioned above, the present invention has a dual structure of the cap for internal use and external use, and the engaging tongue piece of the internal cap is provided with an engaging protrusion that can protrude inward, and the engaging tongue is provided with an engaging protrusion that can be engaged with the outer periphery of the outer bulb. The mating recess is recessed, the outer bulb containing the halogen bulb is inserted into the internal cap, the engaging protrusion is fitted into the engaging recess, and the internal cap is attached to the external cap together with the outer bulb. Because there is
When the internal cap is inserted into the external cap, the engaging tongue piece is held between the outer valve and the external cap, and the outer valve and the engaging tongue piece are physically engaged and fixed securely. For some reason,
Even if there is a problem with the adhesive, the outer valve will not fall off. Additionally, since the outer valve can be completely fixed by simply screwing the internal cap onto the external cap, the assembly work can be greatly simplified. . Furthermore, since this engaging tongue piece is formed with an elastic protrusion for tightening that can protrude outward, when the internal cap is screwed into the external cap, this elastic projection is applied to the inner peripheral surface of the external cap. There is an advantage that the protruding portion makes elastic contact and pushes the engaging tongue piece inward, thereby firmly fixing the inner and outer caps to each other and at the same time increasing the tightening force of the outer valve.

[Brief explanation of drawings]

FIG. 1 is a developed perspective view of a first embodiment of the present invention, and FIG. 2 is a partially cutaway perspective view of a conventional example. A... Cap, 1... Internal cap, 2... External cap, 3... Engaging tongue piece, 4... Engaging convex portion, 5...
Outer bulb, 6... engaging recess, 7... halogen light bulb.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The cap has a double structure of an internal cap and an external cap, and an engaging tongue is formed by cutting out the side surface of the internal cap, which is cylindrical with an opening at the top and a bottom. , an engaging protrusion that can protrude inward is provided on the engaging tongue, an elastic protrusion that can protrude outward for tightening is formed on the engaging tongue, and an engaging recess is provided on the outer periphery of the outer valve. The outer bulb containing the halogen light bulb is inserted into the internal cap, the engaging protrusion is fitted into the engaging recess, and the internal cap is attached to the external cap together with the outer bulb. Mounting structure of outer valve and base. (2) The mounting structure for an outer valve and a cap according to claim 1, wherein the engaging recess is an annular groove and the engaging protrusion is an annular ridge. (3) The outer valve and cap mounting structure according to claim 1 of the utility model registration claim, characterized in that the engaging recess is hole-shaped and the engaging convex portion is protruding. (4) The mounting structure for the outer valve and the cap as set forth in claim 1 of the utility model registration claim, characterized in that a threaded portion is formed on the side surface of the internal cap and the side surface of the external cap.