JP2006260893A - Lamp with cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate necessity of an operator's skill in 3-D positioning of an electrode of a lamp with a cap. <P>SOLUTION: A lamp with a cap is composed of: an electric discharging container with a neck part and an electric discharge electrode; a clamp part fixed on the above mentioned neck; an adapter fixed on any point of the clamp part in a direction of the axis; a lamp cap covering the above mentioned parts; and a fixing part connecting the lamp cap and the above mentioned clamp part. The above mentioned lamp cap has an inner bottom area facing the end face of the above mentioned adapter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lamp with a cap, and more particularly, to a lamp with a cap that facilitates easy positioning of the lamp.

  For example, Patent Document 1 is known as a lamp with a cap.

Japanese National Patent Publication No. 9-501011

  FIG. 7 shows such a conventional lamp with a cap, wherein 1 is a quartz glass discharge vessel, 2 and 3 are neck portions facing each other, 5 is a discharge electrode, 6 is a lead wire connected to the electrode 5, 7 Is a lamp cap made of an insulating material, 8 is its mounting flange, 9 is a cylindrical outer tube made of quartz glass surrounding the discharge vessel 1, and 10 and 11 are for example melting the outer tube 9 and the discharge vessel 1 1 and the other coupling portion, 12 is a cylindrical clamp member fixedly connected to the one coupling portion 10, 13 is the lamp cap 7 of the insulating material and the clamp member 12, and the electrode 5 is the lamp cap 7. It is the connection member connected after being aligned with respect to.

  Generally, in the lamp industry, the electrode position of the lamp is set to the lamp center range (LCL), but the accuracy of this setting greatly affects the light distribution performance of, for example, an automobile headlamp.

  However, in the conventional lamp with cap, the positioning of the electrode 5 of the lamp with respect to the lamp cap 7 requires a three-dimensional adjustment, which requires skill from the operator and takes time. There was a drawback of large variation.

  The present invention eliminates the above-mentioned drawbacks.

  A lamp with a cap according to the present invention includes a discharge vessel having a neck portion and a discharge electrode, a clamp member fixed to the neck portion, an adapter fixed to an arbitrary position in the axial direction with respect to the clamp member, and the above The lamp cap includes a lamp cap that surrounds the clamp member, and a fixing member that connects and fixes the lamp cap and the clamp member. The lamp cap has an inner bottom surface that is in contact with an end surface of the adapter.

  An inner bottom surface of the lamp cap that is in contact with an end surface of the adapter is a hemispherical surface.

  The fixing member is a heat-resistant inorganic adhesive filled in a space formed between the inner peripheral surface of the lamp cap and the outer peripheral surface of the clamp member.

  The adapter has a truncated spherical end surface, and the inner bottom surface of the lamp cap has a concave surface corresponding to the truncated spherical end surface.

  According to the lamp with a cap of the present invention, the three-dimensional positioning of the lamp can be performed very accurately and easily without requiring the skill of the operator.

  In addition, it does not require large-scale equipment, can handle a wide variety of small lots, and has small variations in finished dimensions.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the first embodiment of the present invention, as shown in FIG. 1, the connecting member 13 is not used. Instead, the cylindrical adapter 14 is inserted and fixed in the cylindrical clamp member 12 from the lamp cap 7 side. 14, with the end surface of the lamp cap 7 facing the inner bottom surface 15 of the lamp cap 7, as shown in FIG. 2, the inner peripheral surface of the lamp cap 7, the cylindrical clamp member 12, and the cylindrical shape A heat-resistant inorganic adhesive 16 is filled between the exposed outer peripheral surfaces of the adapter 14 and solidified.

  Since the lamp with a cap according to the present invention is configured as described above, when the distance A between the end face of the adapter 14 and the center of the discharge vessel 1 is set to a predetermined value, the mounting flange 8 of the lamp cap 7 and the discharge The distance B between the centers of the containers 1 can be set very easily and accurately to a desired value, and even if the predetermined value of the dimension A fluctuates to some extent, the insertion amount of the adapter 14 with respect to the clamp member 12 can be increased. By doing so, it becomes possible to cope very easily.

  In addition, you may provide the said adapter 14 so that the outer peripheral surface of the cylindrical clamp member 12 may be covered, as shown in FIG.

  In the second embodiment of the present invention, as shown in FIG. 4, the inner bottom surface of the lamp cap 7 with which the end surface of the adapter 14 is brought into contact is a hemispherical surface.

  According to this embodiment, even if the axis of the discharge vessel 1 with respect to the lamp cap 7 is slightly deviated, the distance A remains constant and is very advantageous for the three-dimensional setting.

  In the third embodiment of the present invention, as shown in FIG. 5, a cover 17 formed on the inner periphery of the lamp cap 7 for closing the space for filling the adhesive 16 is used as the outer periphery of the cylindrical clamp member 12. So that the space can be covered after the adhesive 16 is filled.

  The outer diameter of the cover 17 is preferably 0.2 mm to 0.5 mm smaller than the inner circumference of the lamp cap 7 so that the axial displacement of the discharge vessel 1 relative to the lamp cap 7 can be allowed.

  According to this embodiment, the discharge vessel 1 can be securely fixed to the lamp cap 7.

  In the fourth embodiment of the present invention, an adapter 18 having a truncated spherical end surface joined to the end surface of the cylindrical clamp member 12 is used instead of the adapter 14 as shown in FIG. A concave surface 19 corresponding to the end surface is formed on the inner bottom surface of the lamp cap 7.

  According to this embodiment, the same effect as that of the second embodiment can be obtained.

It is a vertical side view before the adhesive filling of the lamp | ramp with a cap of this invention. It is explanatory drawing after the adhesive agent filling of the lamp | ramp with a cap shown in FIG. It is explanatory drawing of the modification of the lamp | ramp with a cap shown in FIG. It is a vertical side view before the adhesive filling in the 2nd Example of the lamp | ramp with a cap of this invention. It is a vertical side surface before the cover attachment which shows the 3rd Example of the lamp | ramp with a cap of this invention. It is a vertical side view before adhesive filling in the 4th Example of the lamp | ramp with a cap of this invention. It is the side view which made a part of conventional lamp with a cap a section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge container 2 Neck-shaped part 3 Neck-shaped part 5 Discharge electrode 6 Lead wire 7 Lamp cap 8 Flange 9 Cylindrical outer tube 10 Connection part 11 Connection part 12 Cylindrical clamp member 13 Connection member 14 Adapter 15 Inner bottom face 16 Inorganic adhesive 17 Cover 18 Adapter 19 Concave surface

Claims (4)

  A discharge vessel having a neck portion and a discharge electrode; a clamp member fixed to the neck portion; an adapter fixed to an arbitrary position in the axial direction with respect to the clamp member; a lamp cap surrounding the clamp member; A lamp with a cap, comprising: a fixing member for connecting and fixing the lamp cap and the clamp member, wherein the lamp cap has an inner bottom surface that is in contact with an end surface of the adapter.   2. The lamp with cap according to claim 1, wherein an inner bottom surface of the lamp cap that is in contact with an end surface of the adapter is a hemispherical surface.   3. With a cap according to claim 1, wherein the fixing member is a heat-resistant inorganic adhesive filled in a space formed between the inner peripheral surface of the lamp cap and the outer peripheral surface of the clamp member. lamp.   4. The lamp with cap according to claim 1, wherein the adapter has a truncated spherical end surface, and an inner bottom surface of the lamp cap has a concave surface corresponding to the truncated spherical end surface.

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