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Bulb-type lamp and manufacturing method for the bulb-type lamp
| Details |
Inventors: Matsuba, Tetsuo; Kakuno, Yoshinori;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka-Fu, JP)
Primary Examiner: Ward; John Anthony
Assistant Examiner:
Attorney, Agent or Firm:
To provide a bulb-type lamp in which a globe is fixed to a case without a tilt, and a manufacturing method for the bulb-type lamp. The globe is bonded to a connector using a thermosetting resin, in a state where a neck part of the globe is inserted in a groove of the connector without contacting the bottom of the groove. The connector is then fixed to the case by means of a fitting construction. This makes it unnecessary to perform a heating process to cure an adhesive after an envelope is formed by the globe and the case. Hence the tilting of the globe caused by the thermal expansion of air in the envelope can be prevented. |
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DETAILED DESCRIPTION The present invention has an object of providing a bulb-type lamp that holds a globe in a correct position and so delivers an improved external appearance, and a manufacturing method for the bulb-type lamp.
The stated object can be achieved by a bulb-type lamp including: a globe having a constricted neck part at one end; a connector having a ring-shaped groove in which the neck part of the globe can be inserted, wherein the globe is bonded to the connector in a state where the neck part is inserted in the groove; a holder having a stand that supports an electric ballast; and a case having an opening, and holding the holder in a state where the holder is inserted in the case through the opening with the electric ballast being inserted first, wherein in the opening of the case, the connector to which the globe is bonded is fixed to one of the case and the holder by a fitting construction.
With this construction, the globe is held in place just by engaging the connector, to which the globe is bonded, with the case or the holder.
This eliminates the need for the heating process which is conventionally performed after the envelope is formed by the globe and case.
Accordingly, the tilting of the globe caused by the expansion of air in the envelope is prevented, with it being possible to hold the globe without a tilt relative to the case.
As a result, the external appearance of the bulb-type lamp improves.
This reduces the number of defective products, so that increases of manufacturing costs caused by abandoning defective products can be suppressed.
Here, the globe may be bonded to the connector in a state where the neck part which is inserted in the groove is kept from contact with a bottom of the groove.
With this construction, the tilting of the globe can be prevented more efficiently.
Here, the fitting construction may include a depression and a projection that fit together, the depression and the projection each being provided at a different one out of (a) the connector and (b) one of the case and the holder
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