JP2002083574A - Glow starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a comparatively inexpensive glow starter the synthetic resin component of which is easily molded, and the discharge delay time of which is short even when it is left in a dark place for a long time, in spite of a low rate of long persistence phosphor kneaded in. SOLUTION: A pair of electrodes are sealed in the inside of a discharge vessel 1. Long persistence phosphor of 0.01 percent by mass or above, and below 5 percent by mass is kneaded in the synthetic resin of a case C, which houses a glow starter body GS in which discharge medium is sealed; and the infrared ray transmittance of the synthetic resin is 5% or more. If the average grain size of the long persistence phosphor is 40 μm or less or the maximum grain size is 100 μm or less, formability is improved more. Furthermore, by adding polymer flame retarder to the synthetic resin of the case the infrared ray transmittance can be 30% or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a glow starter that can be used to start a fluorescent lamp or the like.

[0002]

2. Description of the Related Art Glow starters have been frequently used to start discharge lamps such as fluorescent lamps.

However, the glow starter needs to be improved because the time required for lighting in a dark place tends to be long. The lighting time is the discharge delay time,
It is the sum of the glow discharge duration, filament preheating time and pulse generation time. The reason why the required lighting time is long in a dark place is that the supply of initial electrons is insufficient, so that the discharge delay time becomes long.

Therefore, conventionally, the discharge delay time has been improved by the following means.

[0005] A small amount of a radioactive isotope such as 1 ¹⁴⁷ Pm is applied to the vicinity of the electrode or electrochemically coated, and a metal such as Ni is plated.

[0006] encapsulated as the ionizing gas filling in ² 85 ^{Kr, 3} H gaseous radioisotope discharge vessel, such as.

In any of the above means, the inside of the discharge vessel can always be ionized by the radioactive isotope, whereby the discharge is started immediately at the time of lighting, so that the effect of improving the discharge delay time is remarkable.

However, when a radioactive substance is used, even if it is in a very small amount, a facility that satisfies radiation safety standards in production and handling and strict management for safe handling are required.

On the other hand, Japanese Patent Application Laid-Open No. H10-255724
The publication discloses that long afterglow is provided by using a phosphor exhibiting long afterglow to make the afterglow incident on the electrode surface in a dark place, thereby supplying initial electrons by photoelectron emission and improving the discharge delay time. A technique has been disclosed that it is better to knead 5 to 30% by weight of a phosphor exhibiting a property into a synthetic resin or the like. Since this method does not use a radioactive substance, it is effective for the above-mentioned problem.

[0010]

However, since a phosphor exhibiting long persistence has a high hardness and is easily damaged by a molding die, it is difficult to mold a synthetic resin into which the phosphor is kneaded. It is necessary to perform surface treatment on the system mold or to increase the frequency of mold replacement due to wear, which is industrially problematic.

In addition, a phosphor having high efficiency and long persistence is generally expensive because of a large amount of rare earth elements, and a synthetic resin kneaded with the above ratio also becomes expensive. Use of such an expensive synthetic resin for a glow starter is industrially unsuitable.

Further, a glow starter used for a fluorescent lamp is required to have light resistance. Therefore, when using a case made of synthetic resin, an inorganic pigment is kneaded into the synthetic resin to improve light resistance in many cases.
Generally, the visible light transmittance is low.

According to the present invention, the discharge delay time is short even when the phosphor is left in a dark place for a long time, and the molding of the synthetic resin body is easy even though the mixing ratio of the long afterglow phosphor is small. Moreover, it is an object to provide a relatively inexpensive glow starter.

[0014]

According to the present invention, there is provided a glow starter comprising a discharge vessel, at least one of which comprises a movable electrode provided with a bimetal, and which is sealed in a discharge vessel which is displaced by heat generated by glow discharge and comes into contact therewith. A glow starter main body including an electrode and a discharge medium mainly composed of a rare gas sealed in a discharge vessel; at least 0.01% by mass or more and less than 5% by mass of a long afterglow phosphor A case formed of a synthetic resin having an infrared transmittance of 5% or more and containing a glow starter body therein;
It is characterized by having.

In the present invention and each of the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.

<Glow Starter Body> The glow starter body includes a discharge vessel, a pair of electrodes and a discharge medium. The following is a description of each component.

(Discharge Vessel) The discharge vessel is formed of a material having airtightness, workability and preferably heat resistance, for example, glass, and has a discharge space therein.
Further, among glass materials, soft glass is excellent in workability and cost.

(Regarding a pair of electrodes) At least one of the pair of electrodes is a movable electrode provided with a bimetal, and is sealed in a discharge vessel. The movable electrode is displaced as the temperature rises due to the heat generated by the glow discharge generated between the electrodes, and the pair of electrodes come into contact when the temperature generally reaches 50 to 150 ° C. Since the electrodes are short-circuited by the contact, when the glow discharge stops, the pair of electrodes are separated again.

The distance between the pair of electrodes is set to 0.1 so that the duration of the glow discharge is as short as possible.
It is preferable to set the distance to about 2 mm.

Further, in order to seal the pair of electrodes at a predetermined position in the discharge vessel while maintaining a predetermined distance between the electrodes, a mount previously assembled at a predetermined distance between the electrodes using a stem may be used. it can. The stem is a flare stem,
A bead stem or the like can be used as appropriate.

Further, if necessary, a secondary electron emitting material such as BaO and / or an electrode activator such as Ba or La can be applied to the electrode.

In order to suppress the occurrence of creeping discharge on the surface of the stem portion between the electrodes and the reduction of the pulse voltage,
The surface of the part can be coated with an insulating material. If a film mainly composed of aluminum oxide particles of an exo (EXO) electron emitting material described later is formed as an insulating material in this case, it is effective for both exo electron emission and creeping discharge suppression.

(Discharge Medium) The discharge medium is mainly composed of a rare gas, and is sealed in a discharge vessel. Argon is generally used as the rare gas, but hydrogen or an organic gas can be mixed with argon for the purpose of increasing the glow discharge current. Alternatively, instead of argon, a mixed gas utilizing the penning effect of neon or neon-argon can be used.

<Case> The case is formed by accommodating a discharge vessel therein and kneading at least a long-persistent phosphor at a predetermined ratio in a synthetic resin, and having an infrared transmittance of not less than a predetermined value. Has become. The afterglow emitted from the long-persistent phosphor excited by long-wavelength ultraviolet light or visible light that has entered the case from the outside transmits the synthetic resin of the case and irradiates the grower main body. Due to the photoelectric effect, even when the glow starter is left in a dark place, the glow starter operates reliably and quickly to start the discharge.

Further, by increasing the infrared transmittance of the case, excitation of the long afterglow phosphor by daylight and emission of the fluorescent lamp becomes active, and daylight and emission of the fluorescent lamp pass through the case. As a result, the photoelectric effect by directly irradiating the glow starter body with light is easily used.

[0026] In the present invention, the term "long afterglow phosphor", the luminance of afterglow 0.32 × 10 - afterglow time required to decay to ^{3 cd} / m ² is more than 15 hours fluorescent You can use your body as a guide. Further, as the long-afterglow phosphor, for example, SrAl ₂ O ₄ : Eu, SrAl ₂ O ₄ :
Eu, Dy, CaAl ₂ O ₄ : Eu, Nd, Sr ₄ Al
₁₄ O ₂₅ : A phosphor such as Eu or Dy can be used.

Further, the long afterglow phosphor is kneaded into the synthetic resin constituting the case at a ratio of 0.01% by mass or more and less than 5% by mass based on the synthetic resin.
Preferably, the mixing ratio is 1.0 to 3.0% by mass. The reason why the lower limit of the blending ratio of the long afterglow phosphor is 0.01% by mass or more is that by increasing the infrared transmittance of the case, the long afterglow phosphor is 0.01% by mass. This is because it was found that the photoelectric effect was recognized even if it was present.
On the other hand, if the mixing ratio of the long afterglow phosphor to the synthetic resin is less than 0.01% by mass, the photoelectric effect on the glow starter is insufficient. The discharge delay time cannot be reduced.

On the other hand, the reason why the upper limit value of the blending ratio of the long afterglow phosphor is less than 5% by mass is that when the blending ratio is 5% or more, the damage to the molding die becomes remarkable and the cost is reduced. This is not only because there is an industrial problem when molding the case, but also because the infrared transmittance is reduced and it is difficult to shorten the discharge delay time due to afterglow.

The long afterglow phosphor is kneaded in the synthetic resin constituting the case at a rate of 0.01% by mass or more and less than 5% by mass based on the synthetic resin. Thus, the molding die is hardly damaged, and even if the glow starter is left in a dark place, the discharge is started reliably and promptly.

Next, if desired, an inorganic additive can be incorporated in addition to the long afterglow phosphor. In this case, the infrared transmittance is 5% to 30%, preferably 5 to 20%.
%, More preferably 5 to 15%. By kneading the inorganic additive, sufficient light diffusivity is imparted to the case, making it difficult to see through the inside of the case, and improving the appearance of the glow starter.

However, in the present invention, it is not essential to incorporate the inorganic additive. In other words, when there is no problem in seeing through the inside of the case, the inorganic additive need not be kneaded. In such a case, only a long-persistent phosphor or a polymer-based flame retardant can be incorporated in addition to the phosphor, and in this case, an infrared transmittance of 20% or more is required. It can be 30% or more.
By adding only a polymer-based flame retardant without using an inorganic additive, light diffusion can be imparted, though not as much as the inorganic additive. That is, as the polymer-based flame retardant, an organic bromide such as bromide polycarbonate or epoxy bromide is used, and a flame retardant aid such as antimony oxide is added to this by several mass%. Has an appropriate light diffusing property.

In the present invention, "infrared transmittance"
Means the diffuse transmittance at a wavelength of 800 nm. Also, the indirect infrared transmittance is specified without specifying the visible light transmittance, because the phosphor is excited in the visible light wavelength range to generate afterglow, so that accurate transmittance can be measured. Because they cannot do it. Furthermore, when the infrared transmittance was in the above range, it was found that the transmittance of long-wavelength ultraviolet light and visible light also had a certain correlation with the infrared transmittance. Then, if the infrared transmittance is in the above range, the phosphor transmits through the synthetic resin of the case and excites the long-persistence phosphor satisfactorily. At least, the afterglow radiated from the phosphor passes through the synthetic resin of the case to generate a photoelectric effect inside the glow starter main body, which has an effect of reducing a discharge delay.

Next, an appropriate kind of synthetic resin, such as polycarbonate, styrene resin, acrylic resin or polypropylene, can be used for forming the case.

The following functions can be selectively given to the case in addition to the above functions.

1 Function of Mechanically Protecting the Glow Starter Main Body By providing the case with the required strength, the glow starter main body can be housed inside the case to mechanically protect the glow starter main body.

2 Function of Adjusting Appearance as Glow Starter By adjusting the appearance of the case, the appearance as a glow starter can be improved.

(3) Function for facilitating attachment / detachment of the glow starter In order to facilitate attachment / detachment of the glow starter to / from the socket, a non-slip ridge or the like can be provided at an appropriate position in the case so as to be easily picked.

(4) The function case supporting the base of the glow starter can be provided with the base as a part thereof.

Depending on the rating of the applicable fluorescent lamp, a screw base such as E17 or a pin base such as P21 may be used.
Shapes and the like can be used. For example, in the case of a P-type glow starter, the case includes a bottomed cylindrical case main body and an insulating substrate that closes an opening of the case main body. The discharge vessel in which the pair of electrodes are sealed and the discharge medium is sealed is wired to a pair of pin bases mounted on the insulating substrate of the hard board, so that the case is supported by the insulating substrate. It is stored inside. In the case of such a configuration, the case main body may be configured as a synthetic resin body. In the case of an E-type glow starter, the case is constituted by a bottomed cylindrical case main body and an E-shaped base for closing an opening of the case main body. The glow starter body is housed in a case supported by the E-shaped base by being wired to the E-shaped base. Also in this configuration, the case main body portion may form a synthetic resin body as described above.

<Function of the Present Invention> In the present invention, at least 0.01% by mass or more and less than 5% by mass of a long afterglow phosphor is incorporated, and the infrared transmittance is 5% or more. Since the case is formed of a synthetic resin, and the glow starter body is housed in the case, the transmittance of the case with respect to visible light and long-wavelength ultraviolet light also increases, and the length kneaded into the case is increased. The afterglow phosphor is excited by daylight or by the emission of a lit fluorescent lamp. Then, the afterglow of the long afterglow phosphor penetrates through the case to irradiate the glow starter body. Therefore, even if the glow starter is left in a dark place, the photoelectric effect is generated inside the glow starter body despite the fact that the amount of the long-persistent phosphor used is smaller than that of the conventional technology. As a result, initial electrons are supplied, so that the fluorescent lamp can be started reliably and quickly, and the discharge delay time is shortened. Although the afterglow of the phosphor decreases with the passage of time, there is little chance that the photoelectric effect cannot be obtained stochastically, so the practical problem can be said to be relatively minor.

Therefore, according to the present invention, there is no need to enclose a radioactive isotope which is troublesome to manage in production and handling.

Also, since the amount of expensive long afterglow phosphor used is within the above-mentioned range and is smaller than that of the prior art, damage to the molding die is reduced and a glow starter can be obtained at low cost.

Further, the quality of the glow starter can be improved by making it easier to grasp the case, making the glow starter easy to attach and detach, and improving the appearance.

In the present invention, the applied voltage is 90 to 240 V
It is suitable for a glow starter.

A glow starter according to a second aspect of the present invention is the glow starter according to the first aspect, wherein the case has a minimum thickness of 0.1 to 1 mm.

The present invention specifies the minimum thickness of the case. Thus, the case has the required mechanical strength, the required amount of phosphor can be kneaded into the case, and the transmission of excitation light and afterglow can be improved.

Further, when an inorganic additive is kneaded in addition to the long afterglow phosphor, the above structure makes the inside transparent and difficult to see.

On the other hand, the minimum thickness of the case is 0.1
If it is less than mm, the case becomes too thin and the mechanical strength decreases, and the amount of the long-persistent phosphor contained is reduced so that the required amount of afterglow cannot be obtained and It becomes easy to see through.

However, as described above, if the inside of the case does not matter at all or does not matter so much, it is not necessary to use an inorganic additive. Then, the case can be modified to be flame-retardant by kneading a polymer-based flame retardant in place of the inorganic additive. In addition, since the infrared transmittance can be increased to 20% or more, and if necessary, to 30% or more, even if the mixing ratio of the long persistence phosphor is small, excitation of the long persistence phosphor can be suppressed. As well as the afterglow, the afterglow applied to the inside of the glow starter body increases, so that the discharge delay time is shortened.

A third case is the glow starter according to the first or second aspect, wherein the inorganic additive is 0.1 to 1 g.
It is characterized by being incorporated by mass%.

The present invention defines a configuration in which an inorganic additive is further kneaded into the synthetic resin of the case. The inorganic additive is kneaded into the synthetic resin at a ratio of 0.1 to 1% by weight with respect to the synthetic resin. To provide light resistance and light diffusion.

On the other hand, when the addition ratio of the inorganic additive is less than 0.1% by weight based on the synthetic resin, the light diffusivity is too small, so that the inside of the case can be easily seen. On the other hand, if it exceeds 1% by weight, the transmittance of the case is too low, and it is difficult to obtain a photoelectric effect due to afterglow for the glow starter.

Thus, in the present invention, light resistance and appropriate light diffusion are imparted to the case by kneading the inorganic additive into the synthetic resin constituting the case together with the long-lasting phosphor. Can be. However, as described above, the transmittance of the case is relatively high, so that the action of transmitting extraneous light to excite the phosphor and illuminating the glow starter body by transmitting the afterglow of the phosphor is impeded. Never.

A glow starter according to a fourth aspect of the present invention is the glow starter according to the third aspect, wherein the inorganic additive comprises:
It is characterized by being titanium oxide fine particles.

The present invention specifies a preferred constitution of the inorganic additive. Titanium oxide fine particles are a substance known as a white inorganic pigment, but by using this as an inorganic additive, the synthetic resin can be made light-resistant even in a relatively small amount, and a white-based pigment can be used. It can be light diffusing. Also, titanium oxide fine particles can be obtained at relatively low cost.

A glow starter according to a fifth aspect of the present invention is the glow starter according to the third or fourth aspect, wherein the case has an infrared transmittance of 5 to 15%.

The present invention defines a preferable range of the infrared transmittance when an inorganic additive is added. That is,
When it is within the above range, the case exhibits good light diffusing properties and has a required light transmittance.

According to a sixth aspect of the present invention, there is provided a glow starter case according to any one of the first to fifth aspects, wherein the long afterglow phosphor incorporated has an average particle size of 4 g / m 2.
It is characterized in that it is not more than 0 μm.

The moldability of the synthetic resin constituting the case is also affected by the average particle size of the long afterglow phosphor to be kneaded. If the average particle size is 40 μm or less, the moldability is improved. I understood. On the other hand, if the average particle size of the long afterglow phosphor exceeds 40 μm, the moldability is lowered from a practical level, which is not preferable.

Further, by adding a polymer flame retardant, a case having a white translucent color tone can be easily obtained.

The glow starter according to a seventh aspect of the present invention is the glow starter according to any one of the first to sixth aspects, wherein the case has a maximum particle diameter of the kneaded long afterglow phosphor. It is characterized in that it is 100 μm or less.

The moldability of the synthetic resin when the long afterglow phosphor is incorporated is governed by the maximum particle size of the long afterglow phosphor. Since the maximum particle size is proportional to the average particle size when the particle size distribution is constant, the formability can be controlled by controlling the average particle size, but directly by controlling the maximum particle size. Formability can be controlled.
Therefore, by defining the maximum particle size, it is possible to maintain good moldability even if the particle size distribution characteristics are different.

Thus, in the present invention, by setting the maximum particle size to 100 μm or less, the moldability of the synthetic resin is improved.

The glow starter according to the eighth aspect of the present invention is the glow starter according to the first or second aspect, wherein the case contains a polymer flame retardant and has an infrared transmittance of 30% or more. It is characterized by:

When a polymer flame retardant is added,
Since the light-diffusing property is imparted by the action of the flame-retardant aid, it is easy to increase the infrared transmittance to 30% or more. When the diffuse transmittance is 30% or more, a long afterglow phosphor is actively excited, so that a large amount of afterglow is obtained and the afterglow irradiating the glow starter body is increased. The photoelectric effect increases.

In addition, the photoelectric effect due to daylight or the emission of a fluorescent lamp also increases.

Further, needless to say, the addition of the polymer flame retardant makes the case flame-retardant and improves the safety.

[0068]

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

FIG. 1 is a front view showing a first embodiment of the glow starter of the present invention.

FIG. 2 is a cross-sectional front view of the main part.

FIG. 3 is a sectional front view of a main part showing a discharge vessel in which a pair of electrodes are sealed and a discharge medium is sealed.

In each figure, GS is a glow starter main body, C is a case, and B is a base. 1 is 4 is case,
5 is a base. This embodiment is an E-shaped glow starter.

<Regarding Glow Starter Main Body GS> The glow starter main body GS includes a discharge vessel 1, a fixed electrode 2, a movable electrode 3, and a discharge medium.

(Discharge Vessel 1) The discharge vessel 1 is made of soft glass, has a glass bulb 1a, a stem portion 1b, and an exhaust tip off portion 1c, and has a discharge space 1d inside.
Are formed. Although not shown, the glass bulb 1a is integrally formed with an open end at one end and a narrow exhaust pipe relatively at the other end in advance. The stem portion 1b is integrated with the glass bulb by sealing a flare stem HS described later on the open end of the glass bulb 1a. Exhaust tip off part 1c
Is formed when the exhaust pipe formed at the other end of the glass bulb is chipped off.

(Fixed electrode 2 and movable electrode 3)
Although not shown, the fixed electrode 2 and the movable electrode 3 are assembled in advance as an electrode mount, and
By being sealed at the open end of the discharge vessel a, it is airtightly supported at a predetermined position in the discharge vessel 1. That is, the electrode mount is configured by integrating the flare stem HS, the fixed electrode 2, the movable electrode 3, and the external introduction lines OL1 and OL2. The discharge vessel 1 is formed by sealing the flare portion of the flare stem to the open end of the glass bulb 1a, and the fixed electrode 2 and the movable electrode 3 are sealed in the discharge vessel 1.

Incidentally, the fixed electrode 2 is made of a rod-shaped metal, the base end of which is sealed to the flare stem, and the external introduction line OL 1
Connected to

On the other hand, the movable electrode 3 is
a and the bimetal 3b. The rod-shaped metal 3a is longer than the fixed electrode 2 and its base end is sealed at a position facing the fixed electrode 2 of the flare stem at a distance from the fixed electrode 2 and is connected to the external introduction line OL2. The bimetal 3b is bent in a U-shape,
As shown in FIG. 3, the upper end is welded to the upper part of the bar-shaped metal 3a, and in a cooled state, the lower end is welded to the bar-shaped metal 3a.
a and is locked.

(Discharge Medium) The discharge medium is made of a rare gas mainly composed of argon, and is sealed in the discharge vessel 1.

<Case C> The case C includes the case main body 4 and a base B described later.
The case main body 4 is formed into a bottomed cylindrical shape by molding a long-persistent phosphor and an inorganic additive into a light-diffusing polycarbonate resin, and has a plurality of protrusions on the peripheral edge. Article 4a is formed. Then, the glow starter main body GS is housed therein.

<Regarding Base B> The base B is made of an E17 type screw base, is mounted on the open end of the case main body 4 and is fixed to the open end of the case main body 4 by caulking. In the drawing, reference numeral 5 denotes a caulking mark formed at the time of caulking.

Embodiment 1 In the first embodiment of the present invention shown in FIGS. 1 to 3, 20 glow starters having the following specifications for the case were manufactured.

Synthetic resin: polycarbonate resin Long afterglow phosphor: CaAl ₂ O ₄ : Eu, Nd, 0.
4% by mass (synthetic resin ratio) Inorganic additive: fine particles of titanium oxide, 0.2% by mass (synthetic resin ratio) FIG. 4 shows an inorganic material for the synthetic resin used in Examples of the first embodiment of the glow starter of the present invention. It is a graph which shows the sample transmittance | permeability before and after kneading | mixing of an additive, and which measured the spectral transmittance.

In the figure, the horizontal axis represents the wavelength (nm) and the vertical axis represents the transmittance (%). Curve A shows the transmittance characteristics of the synthetic resin before kneading the inorganic additive, and curve B shows the spectral transmittance characteristics after kneading the inorganic additive.

As can be seen from the figure, the infrared transmittance before kneading the inorganic additive is about 73%. The infrared transmittance after kneading the inorganic additive is about 23%. Incidentally, the straight line B 'shows the spectral transmission characteristics of a case formed of a synthetic resin into which a long afterglow phosphor is kneaded at 3% by mass, but has a long afterglow in the visible light and long wavelength ultraviolet region. The transmittance at a wavelength of 600 nm or less is omitted because it cannot be measured due to the emission of the phosphor.

Further, a long afterglow phosphor was added to the synthetic resin and kneaded, and a case was formed by molding. Using this case, 20 glow starters were manufactured. And
After leaving them in a dark place for 15 hours, the discharge delay time was measured together with that of the comparative example. The comparative example has the same specifications as the present example except that the case was not kneaded with a long afterglow phosphor and the inorganic additive was kneaded at 3% by mass.

[0085]

[Table 1] FIG. 5 is a graph showing the spectral transmittances of the synthetic resin according to the first embodiment of the glow starter of the present invention and the synthetic resin into which the long afterglow phosphor and the inorganic additive are kneaded together with those of the comparative example. is there.

In the figure, the horizontal axis shows the wavelength (nm), and the vertical axis shows the transmittance (%). Wavelength range from 600 to
The reason why the wavelength is 800 nm is that the wavelength range is not affected by the emission of the long persistence phosphor. Curve P
Shows the spectral transmittance characteristics of the synthetic resin in this embodiment in a state where the long afterglow phosphor and the inorganic additive are not kneaded, and the curves C1 to C4 show the long afterglow fluorescence in this embodiment. The respective spectral transmittance characteristics when the mixing amount of the body and the inorganic additive are changed are shown. Curves D1
D3 shows the respective spectral transmittance characteristics when the amount of the inorganic additive is changed in the comparative example. In addition, the comparative example is
In this case, the amount of the inorganic additive was slightly increased or decreased around 3% by weight.

As can be understood from the figure, the present embodiment
The infrared transmittance is relatively high, and the comparative example is low on the contrary.

Embodiment 2 In the first embodiment of the present invention shown in FIGS. 1 to 3, a glow starter having a case having the following specifications was manufactured.

Synthetic resin: polycarbonate resin Long-persistent phosphor: average particle size 20 μm, maximum particle size 60 μm
m SrAl ₂ O ₄ : Eu, 1.0% by mass (ratio of synthetic resin) Polymer flame retardant: 0.2% by mass of polycarbonate bromide and antimony oxide (ratio of synthetic resin) Infrared transmittance: 35% FIG. FIG. 9 is a partial cross-sectional front view showing a second embodiment of the glow starter of the present invention.

In the figure, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, P
It is a glow starter. That is, the P-type glow starter according to the present embodiment
And the base B is a P21 type pin base.

The case C is composed of a case main body 4 formed by molding a light-transmitting synthetic resin into a bottomed cylindrical shape, and a hard board insulating substrate 7 for closing the opening. The case main body 4 is provided with a knurling portion 4b for picking the periphery of the head. The insulating substrate 7 is engaged with the opening end of the case main body 4 and is fixed by an adhesive.

The base B includes a substrate 7 and a pair of base pins 8. The insulating substrate 7 also serves as a part of the case C. The pair of base pins 8, 8 are fixed to the insulating substrate 7 so as to be spaced apart and opposed to each other, and include a locking protrusion 8 a protruding outside the case C and a connecting portion 8 b protruding inside the case C. .

The noise prevention capacitor 6 is connected to its lead wire 6
It is connected to the connecting portion 8b of the pair of pins 8, 8 so as to be connected in parallel to the fixed electrode 2 and the movable electrode 3 via a.

[0093]

According to each of the first to eighth aspects of the present invention, there is provided a case in which a pair of electrodes are sealed inside a discharge vessel and a glow starter body enclosing a discharge medium is housed therein. 0.01% by mass or more of light-emitting phosphor, and
Less than 5% by mass is kneaded into the synthetic resin, and the infrared transmittance of the synthetic resin is 5% or more. The phosphor is excited well and the afterglow irradiating the glow starter body increases, so that not only can the discharge delay time be shortened even when left in a dark place for a long time due to the photoelectric effect. In addition, it is possible to provide a glow starter that has good moldability of the case and is relatively inexpensive.

According to the second aspect of the present invention, the case has a minimum thickness of 0.1 to 1 mm, so that the case has a required mechanical strength and a required amount of phosphor can be kneaded. A glow starter that can be provided.

According to the third aspect of the present invention, a glow starter having a light resistance and an appropriate light diffusing property is imparted to a case by adding 0.1 to 1% by mass of an inorganic additive to the case. Can be provided.

According to the fourth aspect of the present invention, since the inorganic additive is titanium oxide, the amount of the inorganic additive can be made relatively small and the case can be made to have a desired light diffusing property while maintaining a high transmittance. The glow starter can be provided.

According to the fifth aspect of the present invention, the case formed of a synthetic resin into which a long persistence phosphor and an inorganic additive are kneaded has an infrared transmittance of 5 to 15%. A suitable glow starter can be provided.

According to the sixth aspect of the present invention, since the average particle diameter of the long afterglow phosphor kneaded in the synthetic resin of the case is 40 μm or less, the glow having better moldability can be obtained. A starter can be provided.

According to the seventh aspect of the present invention, since the maximum particle size of the long afterglow phosphor kneaded in the synthetic resin of the case is 100 μm or less, a glow having better moldability can be obtained. A starter can be provided.

According to the eighth aspect of the present invention, in addition to the case, a polymer flame retardant is added to the case, and since the infrared transmittance is 30% or more, the long afterglow phosphor can be excited. It is possible to provide a glow starter in which a large amount of afterglow is obtained and the photoelectric effect by the afterglow is increased.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a glow starter of the present invention.

FIG. 2 is a cross-sectional front view of the same main part.

FIG. 3 is a sectional front view of a main part showing a discharge vessel in which a pair of electrodes are sealed and a discharge medium is sealed.

FIG. 4 is a graph showing spectral transmittances of synthetic resins used in Examples of the glow starter according to the first embodiment of the present invention, which were measured by preparing data pieces before and after kneading inorganic additives.

FIG. 5 is a graph showing the spectral transmittance of the synthetic resin according to the first embodiment of the glow starter of the present invention and the synthetic resin into which a long persistence phosphor and an inorganic additive have been kneaded together with those of a comparative example.

FIG. 6 is a partially sectional front view showing a second embodiment of the glow starter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Discharge container 1a ... Glass bulb 1b ... Stem part 1c ... Exhaust tip off part 1d ... Discharge space 2 ... Fixed electrode 3 ... Movable electrode 3a ... Bar-shaped metal 3b ... Bimetal 4 ... Case main part 4a ... Protrusion 5 ... Crimping Mark B ... Clip C ... Case GS ... Glow starter body

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeru Osawa F-term (reference) 5C039 EA11 EB02 in 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo

Claims (8)

[Claims] A pair of electrodes sealed in a discharge vessel, wherein at least one of the discharge vessels comprises a movable electrode provided with a bimetal and is displaced by heat generated by glow discharge and comes into contact with the electrode;
And a glow starter main body including a discharge medium mainly composed of a rare gas sealed in a discharge vessel; at least 0.01% by mass or more and less than 5% by mass of a long afterglow phosphor is kneaded. A case formed of a synthetic resin having an infrared transmittance of 5% or more and containing a glow starter main body therein. 2. The glow starter according to claim 1, wherein the case has a minimum thickness of 0.1 to 1 mm. 3. The case according to claim 1, wherein the case contains 0.1 to 1% by mass of an inorganic additive.
The described glow starter. 4. The glow starter according to claim 3, wherein the inorganic additive is titanium oxide fine particles. 5. The glow starter according to claim 3, wherein the case has an infrared transmittance of 5 to 15%. 6. The glow starter according to claim 1, wherein the case has an average particle diameter of the long afterglow phosphor incorporated therein of 40 μm or less. 7. The gloister according to claim 1, wherein the maximum particle size of the long afterglow phosphor incorporated in the case is 100 μm or less.
Ta. 8. The gloister according to claim 1, wherein the case contains a polymer flame retardant and has an infrared transmission factor of 30% or more.
Ta.