JPH0531103U - Glass reflector - Google Patents

Abstract

(57) [Summary] [Purpose] To improve assembly accuracy without the need for secondary processing. [Structure] By using the end face of the bottom of the neck portion whose shape does not change during molding as the reference surface, the assembly accuracy is improved without the need for secondary processing for improving the assembly accuracy, and it is formed in the recess. By rounding the periphery of the hole with a flame of a burner, cracks and chips generated from the peripheral edge of the hole are suppressed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a glass reflecting mirror in which the shape of a neck end portion for sealing a halogen bulb is improved in a lighting fixture using the halogen bulb.

[0002]

[Prior Art]

 In recent years, a halogen lamp 1 as shown in Fig. 3 has been attracting attention in many fields such as for store lighting, as a new light source that is compact and provides high illuminance. That is, in FIG. 3, reference numeral 2 is a halogen light bulb, and the reflection film 4 is vapor-deposited on a glass reflective substrate 3 having a spheroidal or paraboloidal concave portion in which the front portion of the halogen light bulb 2 is expanded. Surrounded by a glass reflector 5 coated by the method, and considering the light distribution and safety of the halogen lamp, the front glass 6 in the front opening of the glass reflector 5 has a low melting point, for example. A halogen lamp 1 is obtained which is sealed by an adhesive made of glass or the like and the halogen bulb 2 is not exposed.

The halogen bulb 2 is inserted from the front side of the glass reflecting mirror 4 and is sealed and fixed to the neck portion 8 of the glass reflecting mirror 5 by a sealant 7 made of a ceramic filler or the like. The lead wire 12 is led out through a hole 11 formed in a recess 10 formed by the end surface 9 at the bottom of the neck portion 8.

By the way, in the glass reflecting mirror 5 of the halogen lamp 1 using the halogen bulb 2, as shown in FIG. 4, the halogen is used with the concave portion 10 formed in the end surface 9 of the neck portion 8 as a reference surface. It is common practice to assemble the lamp 1 and round the end face 9 with the burner flame. Further, a punching method is widely known as a processing method for forming the hole 11 for leading out the conducting wire 12 to the bottom portion 9 of the neck portion 8. This punching method is the end surface 9 of the neck portion 8 after press forming shown in FIG. Is heated by the flame of a burner to form a hole 11 in the recess 10 by punching as shown in FIG.

[0005]

[Problems to be solved by the device]

 However, when the hole 11 is formed by the punching method described above, burrs 13 are generated in the recess 10 serving as the reference surface, which makes it difficult to assemble the halogen lamp 1 accurately.

Further, in order to improve the assembling accuracy, secondary processing such as shaping the shape of the recess 10 is required.

The present invention has been made in view of the above circumstances, and provides a glass reflecting mirror that does not require secondary processing when punching a hole in a neck portion and has high assembly accuracy. The purpose is to

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a glass mirror having a reflecting surface portion that reflects light emitted from a light bulb and a neck portion that holds the light bulb, in which the bottom end surface of the neck portion is a reference surface. In addition, it is characterized in that the hole formed in the concave portion of the bottom is rounded by the flame of the burner.

[0009]

[Action]

 Since the present invention is configured as described above, by using the end face of the bottom of the neck, which does not change its shape during molding, as the reference surface, there is no need for secondary processing for improving assembly accuracy. Assembling accuracy is improved, and by rounding the periphery of the hole formed in the recess with the flame of the burner, cracks and chips generated from the peripheral edge of the hole are suppressed.

[0010]

【Example】

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

FIG. 1 is a view showing a heating method by burner heating of a neck portion of a glass reflecting mirror according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a shape of the neck portion after heating.

As shown in FIG. 1, a cover 20 covers a range from the end face 9 to the side face of the neck portion 8 in which a hole 11 is formed by punching out the recess 10 of the neck portion 8 after press molding shown in FIG. The flame 22 of the burner 21 heats the periphery of the hole 11. By the heating of the burner 21 by the flame 22, the burrs and the like generated on the peripheral edge of the hole as shown in FIG. 6 are melted and rounded, and cracks and chips generated from the peripheral edge of the hole 11 are suppressed. The shape of the neck portion 8 obtained as a result of this burner heating is the shape shown in FIG.

Further, since the lower end surface 9 of the neck portion 8 is covered with the cover 20 when the burner is heated, it is not directly heated by the flame 22 of the burner 21, so the shape of the end surface 9 of the neck portion 8 is formed by press molding. It is the same as the shape of time. Therefore, the end surface 9 of the neck portion 8 is used as an assembly reference surface when assembling the halogen lamp 1. In this way, since the end surface 9 whose shape does not change from that during press molding is used as the assembly reference surface, the secondary processing for improving the assembly accuracy, which has been conventionally required, is unnecessary.

It should be noted that the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist of the present invention.

[0015]

[Effect of the device]

 As described in detail above, according to the glass reflecting mirror of the present invention, the end face of the bottom of the neck portion, which does not change its shape during molding, is used as the reference surface, thereby eliminating the need for secondary processing and assembling accuracy. By rounding the periphery of the hole formed in the recess with a flame of a burner, it is possible to suppress cracks and defects generated from the peripheral edge of the hole.

[Brief description of drawings]

FIG. 1 is a diagram showing a method for heating a neck portion by burner heating of a glass reflecting mirror according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a shape of a neck portion after heating.

FIG. 3 is a diagram schematically showing a general halogen lamp with a front glass.

FIG. 4 is a cross-sectional view showing a neck portion of a conventional glass reflecting mirror.

FIG. 5 is a cross-sectional view showing a neck portion after press molding.

FIG. 6 is a cross-sectional view showing an example of the neck portion after punching the neck portion.

[Explanation of symbols]

 2 ... Halogen bulb (bulb) 4 ... Reflective film (reflection surface) 5 ... Glass reflector 8 ... Neck 9 ... End 10 ... Recess 11 ... Hole 21 ... Burner 22 ... Flame

Claims (1)

[Scope of utility model registration request] 1. A glass reflecting mirror having a reflecting surface portion for reflecting light emitted from a light bulb and a neck portion for holding the light bulb, wherein an end face of the bottom portion of the neck portion serves as a reference surface and a recess in the bottom portion. A glass reflecting mirror having a rounded shape around the hole formed by the flame of a burner.