JP2001093304A - Electrodeless discharge lamp lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrodeless discharge lamp lighting device, inhibiting the deformation of extending portions extending from a winding portion of an induction coil and the deformation of the winding portion and also providing a stable high frequency power supply with a decrease in output variation due to the variation of an inductance value for the induction coil. SOLUTION: An induction coil 2 is wound between flange portions 3a, 3b on the upper and lower surfaces of a bobbin 3 arranged outside a bulb 1. A protrusion 4 is protruded from the flange 3b on the lower face of the bobbin 3, and the induction coil 2 wound on the bobbin 3 is positioned and fixed at a border between the protrusion 4 and the flange 3b and extending portions 2b, 2c extend downward from the fixed extending ends 5b, 5c thereof. The extending ends 5b, 5c are fixed in proximity to the cross distance of the protrusion 4 by the protrusion 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulb made of a light-transmitting material in which a discharge gas is sealed, and has no electrodes inside, and a high-frequency power generated by a high-frequency power supply is arranged close to the bulb. The present invention relates to an electrodeless discharge lamp lighting device that excites a discharge gas to emit light by applying a high-frequency electromagnetic field to a discharge gas sealed in a bulb by applying the discharge gas to an induction coil.

[0002]

2. Description of the Related Art There is known an electrodeless discharge lamp lighting device which excites a discharge gas to emit light by applying a high-frequency electromagnetic field to a discharge gas sealed in a bulb. This type of electrodeless discharge lamp lighting device is compact, high output,
Because of its features such as long life, research and development are being conducted in various places, and various uses as high-power point light sources are being considered.

[0003] An electrodeless discharge lamp lighting device is disclosed in
No. 0-106504. As shown in FIG. 17, this electrodeless discharge lamp lighting device has a bulb 21
, An induction coil 22 and a bobbin 23. The induction coil 22 is wound around a bobbin 23 disposed outside the valve 21 so as to surround the valve 21.
2 is supplied with a high-frequency current from a high-frequency power supply,
The discharge gas is excited and emits light by applying a high-frequency electromagnetic field to the discharge gas sealed therein.

In the electrodeless discharge lamp lighting device, the Q of the induction coil 22 needs to be extremely high in order to efficiently apply a large high-frequency electromagnetic field to the discharge gas at the time of starting. As a result, there is a problem that the output of the high-frequency power supply greatly fluctuates due to the fluctuation of the inductance value due to a slight change in the shape of the induction coil 22.

In order to suppress the change in the shape of the induction coil, the bobbin 2 is held so that the shape of the induction coil 22 is maintained.
A spiral induction coil holding groove 23a is formed on the outer peripheral surface of No.3. The measures to maintain such a shape are effective in a case where the induction coil 22 which becomes high in temperature during the lighting of the discharge lamp repeatedly turns on and off, causing sagging and changing the shape.

[0006]

However, even if the shape of the induction coil 22 is maintained as described above, the induction coil 2 may be generated during the assembly and use of the electrodeless discharge lamp lighting device.
The displacement of the inductance value due to the deformation of the extending portion 22b extending from the winding portion 22a wound around the second bobbin 23 and connected to the high frequency power supply (not shown) cannot be suppressed. In addition, when the connecting portion 22b receives an external force due to processing or gravity at the time of assembling the electrodeless discharge lamp lighting device, the shape of the winding portion 22a of the induction coil 22 may be affected.

The conventional example shown in FIG. 18 has a double tube structure in which an outer tube 33 is provided outside a spherical valve 31, and a spiral coil holding groove provided on the outer peripheral surface of the outer tube 33. The induction coil 32 is disposed in the
It is wound outside. Here, the valve 31 is the support rod 3
4 is fixed to the outer tube 33. In this electrodeless discharge lamp lighting device, near the both ends of the winding portion 32a of the induction coil 32, a fixing portion 35 provided on the outer tube 33 is fixed using an adhesive 36 such as a ceramic bond or a glass material (FIG. (Not shown) or the like to fix the outer tube 33 by pressing it.

In such a fixing method, the induction coil 32
After winding, the adhesive 36 is applied to the outer tube 33,
Processing to attach a glass material or the like is required. Further, in this example, it is not a measure for preventing deformation of the extension 32b extending from the winding portion 32a of the induction coil 32 and connected to a high-frequency power supply (not shown).

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to suppress the deformation of the extension portion extending from the winding portion of the induction coil and the deformation of the winding portion, and to reduce the inductance of the induction coil. An object of the present invention is to provide a stable electrodeless discharge lamp lighting device in which the output fluctuation of a high-frequency power supply due to the fluctuation of the value is small.

[0010]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a valve made of a light-transmitting material and having a discharge gas sealed therein, and a bobbin disposed close to the valve. And an induction coil having a winding portion wound around the bobbin and a pair of extension portions extending from the winding portion and extending in parallel with a central axis of the winding portion, and a winding portion of each extension portion. Fixing means for fixing the extending ends to be closer to each other, and energizing a high-frequency current from a high-frequency power supply to the induction coil from the extending portion to excite a discharge gas sealed in the bulb. It is characterized by emitting light. In this way, a pair of extending portions that extend from the winding portion of the induction coil and through which the high-frequency current from the high-frequency power supply is supplied to the induction coil extend in parallel with the central axis of the winding portion. Since the extension ends of the extension portions extending from the winding portions are fixed so as to be close to each other, the extension portions of the induction coil are collectively extended from the winding portions. The deformation of each extension portion due to the force applied to the portion can be prevented, and a stable electrodeless discharge lamp lighting device in which the output fluctuation of the high frequency power supply due to the fluctuation of the inductance value of the induction coil is small.

According to a second aspect of the present invention, in the first aspect of the present invention, the extension portion of the induction coil extends vertically from the winding portion. Therefore, the force applied to each extension of the induction coil can be suppressed from being transmitted to the winding part, and the shape of the winding part is prevented from changing,
Variations in the inductance value of the induction coil can be further reduced, and a stable electrodeless discharge lamp lighting device with less variation in the output of the high-frequency power supply can be obtained.

According to a third aspect of the present invention, in the first or second aspect of the invention, the induction coil is wound around the bobbin in an axial direction.
Therefore, the winding of the induction coil becomes easy.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the induction coil is wound around the bobbin so as to overlap in a radial direction.
Therefore, there is little interruption of light from the bulb by the winding portion of the induction coil and the bobbin, and a more efficient electrodeless discharge lamp lighting device can be obtained.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the fixing means comprises a hole, a projection, or a notch provided in the bobbin. Features. Therefore, the induction coil can be easily fixed to the bobbin without using an adhesive or the like.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, each extending end is pulled in the radial direction of the bobbin from the center of the winding portion of the induction coil. Are arranged and fixed on the same straight line. Therefore, since each extension end of each extension part of the induction coil can be fixed in the closest state, each extension part can be extended at an angle most perpendicular to the winding part.
Thus, even when a force is applied to the extension portion, transmission of the force to the winding portion can be suppressed, and deformation of the winding portion can be prevented. Further, by extending each extending portion at an angle closest to the vertical direction from the winding portion, the extending portion can be formed linearly, so that even if a longitudinal force is applied to the extending portion. The extension is less likely to deform. Therefore, a variation in the inductance value of the induction coil can be suppressed to a small value, and a stable electrodeless discharge lamp lighting device with a small output variation of the high-frequency power supply can be obtained.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the fixing means is a fixing member made of a member different from the bobbin arranged close to the bobbin. It is characterized by the following. Therefore, since there is no need to provide a fixing means on the bobbin, the structure of the bobbin is simplified.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the fixing member has a through hole, and each extending end is inserted by inserting an extending portion of the induction coil into the through hole. Is fixed. Therefore, the induction coil can be inserted into the through hole and fixed, and can be firmly fixed with a simple structure.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the fixing member has two through holes, and each extension portion of the induction coil is inserted into each through hole one by one. It is characterized by the following. Thus, in order to insert each extension portion of the induction coil into the individually provided through hole of the fixing member,
The extension ends of the extension portions can be more firmly fixed, and the influence between the extension portions can be reduced.

According to a tenth aspect of the present invention, in the seventh aspect of the present invention, the fixing member has a groove, and each extension end is fixed by fitting an extension of the induction coil into the groove. It is characterized by doing. Therefore, it can be fixed by a simple method without performing the operation of passing the extension of the induction coil through the hole.

According to an eleventh aspect of the present invention, in any one of the seventh to tenth aspects, the fixing member extends along a length direction of an extension of the induction coil. It is characterized by. Therefore, it is possible to more securely and reliably prevent the deformation of the extension portion, and to obtain a stable electrodeless discharge lamp lighting device in which the inductance value of the induction coil is small and the output of the high-frequency power source is small.

According to a twelfth aspect of the present invention, in any one of the seventh to eleventh aspects, the fixing member is fixed to the bobbin. Therefore, it is possible to prevent a change in the shape of the fixed portion of the induction coil such that each extension of the induction coil is displaced with respect to the winding portion. A small and stable electrodeless discharge lamp lighting device can be obtained.

According to a thirteenth aspect of the present invention, there is provided a bulb made of a light-transmitting material and having a discharge gas sealed therein, a bobbin disposed in close proximity to the bulb, a winding part wound around the bobbin, An induction coil extending vertically from the winding portion and having a pair of extending portions extending in parallel with the central axis of the winding portion, and a hole, a projection, or a notch provided in the bobbin, and Fix each extension end so that each extension end extending from the winding portion of the extension portion is arranged on the same straight line drawn in the radial direction of the bobbin from the center of the winding portion of the induction coil. And a high-frequency current from a high-frequency power supply is supplied to the induction coil from the extension portion to excite and discharge the discharge gas sealed in the bulb. In this way, the extension of the induction coil extends vertically from the winding, so that the same effect as in claim 2 is obtained, and the fixing means has a hole, projection, or cutout provided on the bobbin. Because of the notch, the same effect as in claim 5 is obtained, and each extension end of each extension portion is drawn on the same straight line drawn in the radial direction of the bobbin from the center of the winding portion of the induction coil. Since the respective extending ends are fixed by the fixing means so as to be arranged at the same position, the same effect as in claim 6 can be obtained.

[0023]

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a structure of the electrodeless discharge lamp lighting device, and FIG. 2 is a bottom view showing a partial structure of the electrodeless discharge lamp lighting device. As shown in FIG. 1, the substantially spherical bulb 1 is formed of a light-transmitting material such as glass, and has a discharge gas sealed therein. Outside the valve 1, flanges 3a are provided on both upper and lower surfaces.
A cylindrical bobbin 3 on which a bobbin 3b is formed is disposed close to the valve 1, and an induction coil 2 is wound between the flanges 3a and 3b of the bobbin 3 so as to overlap in the radial direction of the bobbin 3. ing. The bobbin 3 is fixed to a base (not shown) via a support or the like.

The induction coil 2 includes a winding portion 2a wound around the bobbin 3, and a winding portion 2a extending below the winding portion 2a.
and a pair of extending portions 2b and 2c (lead portions) extending in the up-down direction parallel to the central axis of “a”. The flange 3b on the lower surface of the bobbin 3 is formed with a projection 4 as a rectangular fixing means protruding outward, and the induction coil 2 wound around the bobbin 3 is located at the boundary between the projection 4 and the flange 3b. Part 4b,
4c, which is positioned and fixed, and the fixed extended end 5
Extension portions 2b and 2c extend below b and 5c.
The extended ends 5b and 5c correspond to both ends of the winding portion 2a.
The extended ends 5b and 5c are fixed by the projections 4 in the vicinity of the distance of the width of the projections 4.

The electrodeless discharge lamp lighting device thus constructed is configured such that a high-frequency power source (not shown) uses a high-frequency power source (not shown) to connect the ends of the extension portions 2b and 2c of the induction coil 2 opposite to the winding portion 2a. When a current is applied, an electromagnetic field (high-frequency electromagnetic field) is generated around the induction coil 2. The discharge gas sealed in the bulb 1 is excited by the electromagnetic field to emit light, and is lit.

As described above, since the extending ends 5b and 5c which are both ends of the winding portion 2a are fixed so as to be close to each other,
The extension portions 2b, 2c can be collectively pulled out from the winding portion 2a, and the extension portions 2b, 2c by the force applied to the extension portions 2b, 2c.
b, 2c can be prevented, and a stable electrodeless discharge lamp lighting device in which the output fluctuation of the high frequency power supply due to the fluctuation of the inductance value of the induction coil 2 is small can be realized.

Further, since the induction coil 2 is wound around the bobbin 3 so as to be overlapped in the radial direction, the interruption of light emitted in the bulb 1 by the induction coil 2 and the bobbin 3 is reduced, and the efficient electrodeless discharge is achieved. A lamp lighting device is obtained. For simplicity, the induction coil 2 may be wound around the bobbin 3 in an axial direction.

(Embodiment 2) Next, Embodiment 2 of the present invention
Will be described with reference to FIGS. FIG. 3 is a perspective view showing the structure of the electrodeless discharge lamp lighting device, and FIG. 4 is a cross-sectional view of a part of the structure of the electrodeless discharge lamp lighting device at the bottom surface of the flange 3b. The first embodiment is different from the first embodiment in that the winding part 2a
The fixing means for fixing the extending ends 5b and 5c corresponding to the both ends of the above-mentioned parts are different. That is, in the present embodiment, the notches 6a and 6b are provided on the inner peripheral side and the outer peripheral side of the flange portion 3b on the lower surface of the bobbin 3, respectively, as the fixing means, and the extension portions 2b and 2c of the induction coil 2 are extended. Outer ends 5b, 5c have notches 6a,
6b, and is fixed close to the bobbin 3 in a substantially radial distance. The extending portions 2b and 2c are processed so as to extend substantially perpendicularly to the winding portion 2a. The other configuration is the same as that of the first embodiment, and a description thereof will be omitted.

In this embodiment, since the extending portions 2b and 2c extend substantially perpendicularly to the winding portion 2a,
b, preventing the force applied to the winding portion 2a from being transmitted to the winding portion 2a, suppressing a change in shape of the winding portion 2a, and suppressing a change in the output of the high-frequency power supply due to a change in the inductance value of the induction coil 2; There is an effect that a discharge lamp lighting device can be realized.

(Embodiment 3) Next, Embodiment 3 of the present invention.
Will be described with reference to FIGS. FIG. 5 is a perspective view illustrating the structure of the electrodeless discharge lamp lighting device, and FIG. 6 is a cross-sectional view of a part of the structure of the electrodeless discharge lamp lighting device at the bottom surface of the flange 3b. The first embodiment is different from the first embodiment in that the winding part 2a
The fixing means for fixing the extending ends 5b and 5c corresponding to the both ends of the above-mentioned parts are different. That is, in the present embodiment, a substantially rectangular hole 7 is provided in the flange portion 3b on the lower surface of the bobbin 3 as a fixing means, and the extension portions 2b, 2c of the induction coil 2 extend at both longitudinal ends of the hole 7. Outer ends 5b and 5c are fixed. The other configuration is the same as that of the first embodiment, and a description thereof will be omitted.

(Embodiment 4) Next, Embodiment 4 of the present invention.
This will be described with reference to FIGS. FIG. 7 is a perspective view showing a structure of the electrodeless discharge lamp lighting device, and FIG. 8 is a side sectional view showing a partial structure of the electrodeless discharge lamp lighting device. The present embodiment differs from Embodiment 1 in the fixing means for fixing the extending ends 5b and 5c corresponding to both ends of the winding portion 2a. That is, in the present embodiment, as the fixing means, a projection 8 projecting downward on the outer peripheral side of the flange 3a on the upper surface of the bobbin 3 is provided, and the protrusion 8 is notched downward on the outer peripheral side of the flange 3b on the lower surface of the bobbin 3. A notch 9 is provided.

One end of the induction coil 2 wound around the bobbin 3 passes through the inner peripheral side of the projection 8 and a part thereof is fixed to the side 8a of the projection 8, and the extension 2b extends downward. The other end of the induction coil 2 is connected to an end 9 a of the notch 9.
And the extension 2c is configured to extend downward. At this time, the protrusion 8 and the notch 9 of the induction coil 2
Are extended ends 5b and 5c, which are ends of the extended portions 2b and 2c, and the extended ends 5b and 5c are closely arranged in the longitudinal direction (axial direction) of the bobbin 3. Have been. The other configuration is the same as that of the first embodiment, and a description thereof will be omitted.

(Embodiment 5) Next, Embodiment 5 of the present invention
This will be described with reference to FIGS. FIG. 9 is a perspective view showing the structure of the electrodeless discharge lamp lighting device, and FIG. 10 is a cross-sectional view of a part of the structure of the electrodeless discharge lamp lighting device at the bottom surface of the flange 3b. The present embodiment differs from Embodiment 1 in the fixing means for fixing the extending ends 5b and 5c corresponding to both ends of the winding portion 2a. That is, in the present embodiment, as the fixing means, a notch 10 cut out toward the inner circumferential direction is provided on the outer circumferential side of the flange portion 3b on the lower surface of the bobbin 3, and a hole 11 is provided on the inner circumferential side of the notch 10. ing. The notch 10 and the hole 11 correspond to the center P of the winding portion 2a of the induction coil 2.
Are arranged on the same straight line drawn in the radial direction (Q direction) of the bobbin 3.

Then, the extension end 5b of the extension 2b of the induction coil 2 is engaged and fixed in the notch 10, and the hole 11
The extension end 5c of the extension 2c is engaged with and fixed. The extending portions 2b and 2c are processed so as to extend substantially perpendicularly to the winding portion 2a.

As described above, the extension ends 5b and 5c are fixed to the notch 10 and the hole 11, so that the extension ends 5b and 5c corresponding to both ends of the winding portion 2a are respectively formed by the winding portions. 2a
Are arranged on the same straight line drawn in the radial direction (Q direction) of the bobbin 3 from the center P of the winding portion 2a, and both ends of the winding portion 2a can be fixed in the closest state. Thus, the extension portions 2b and 2c can be extended at an angle closest to the vertical. Therefore, when a force is applied to each of the extending portions 2b and 2c, transmission of a force to the winding portion 2a can be prevented, and variation in the inductance value of the induction coil 2 due to deformation of the winding portion 2a is reduced. It is possible to realize a stable electrodeless discharge lamp lighting device in which the output of the high-frequency power source is suppressed and the output fluctuation is small.

(Embodiment 6) Next, Embodiment 6 of the present invention.
This will be described with reference to FIGS. FIG. 11 is a perspective view showing the structure of the electrodeless discharge lamp lighting device, and FIG. 12 is a sectional view showing the structure of the fixing member. The present embodiment differs from Embodiment 1 in the fixing means for fixing the extending ends 5b and 5c corresponding to both ends of the winding portion 2a. That is, in the present embodiment, as the fixing means, a ring-shaped fixing member 12 which is a separate member from the bobbin 3 is used. Then, each extension 2b, 2c of the induction coil 2 is inserted into the through hole 13 of the fixing member 12, and the fixing member 12 is disposed slightly below the extension ends 5b, 5c in proximity to the bobbin 3, Each extension end 5
b and 5c are fixed so as to be close to each other. At this time, the extending portions 2b and 2c are processed so as to extend substantially perpendicularly to the winding portion 2a.

As described above, in this embodiment, each extension end 5
Since a member separate from the bobbin 3 is used as the fixing means for b and 5c, the effect that the bobbin structure can be simplified can be obtained.

(Embodiment 7) Next, Embodiment 7 of the present invention.
Will be described with reference to FIGS. FIG. 13 is a perspective view showing the structure of the electrodeless discharge lamp lighting device, and FIG. 14 is a sectional view showing the structure of the fixing member. The present embodiment is different from the sixth embodiment in that it has two through holes 15a, 15b as fixing means, and each extension 2b,
The point is that a cylindrical fixing member 14 which is a separate member from the bobbin 3 extending in the length direction of 2c is used. Each of the extension portions 2b and 2c of the induction coil 2 is inserted one by one into each of the through holes 15a and 15b of the fixing member 14, and the fixing member 14 is slightly below the extension ends 5b and 5c. 3 and is fixed so that the extending ends 5b and 5c are close to each other. At this time, the extension part 2
b and 2c are processed so as to extend substantially perpendicularly to the winding portion 2a.

In the present embodiment, in addition to the effects described in the sixth embodiment, each extension 2b, 2c is individually inserted into the through-holes 15a, 15b of the fixing member 14 and fixed. The extension ends 5b, 5c can be more firmly fixed, and the influence between the extension portions 2b, 2c can be reduced. In addition, since the fixing member 14 extends in the length direction of each of the extending portions 2b and 2c, the extending ends 5b and 5c can be more firmly and reliably fixed.

Embodiment 8 Next, Embodiment 8 of the present invention.
This will be described with reference to FIGS. FIG. 15 is a perspective view showing the structure of the electrodeless discharge lamp lighting device, and FIG. 16 is a perspective view showing the structure of the fixing member. This embodiment is different from Embodiment 7 in the fixing means for fixing the extending ends 5b and 5c of the extending portions 2b and 2c of the induction coil 2.

That is, in this embodiment, as the fixing means,
A fixing member 16 made of a member different from the bobbin 3 is used.
The fixing member 16 is provided with a concave portion 16a having a width in the vertical direction substantially equal to the vertical width of the bobbin 3 above the center, and has a substantially U-shape. Each extension 2 of the induction coil 2 downward
Grooves 16b and 16c into which b and 2c are fitted and fixed are provided close to each other.

The bobbin 3 is inserted into the recess 16a of the fixing member 16.
The fixing member 16 is fixed to the bobbin 3 with the upper and lower flange portions 3a, 3b interposed therebetween, and the extension portions 2b, 2c of the induction coil 2 extending below the winding portion 2a are fitted into the grooves 16b, 16c. And fix them so that the extending ends of the extending portions 2b and 2c are close to each other. At this time, the fixing member 16 is
b, 2c extending in the length direction, and extending portions 2b, 2c
Are firmly fixed by grooves 16b and 16c.

In this embodiment, the groove 16 of the fixing member 16
Since the extension portions 2b, 2c of the induction coil 2 are fitted and fixed to the b, 16c, the extension portions 2b, 2c are easily fixed without performing the work of passing the extension portions 2b, 2c through the holes as in the sixth and seventh embodiments. can do. Further, since the fixing member 16 is fixed to the bobbin 3, a change in the shape of the fixed portion of the induction coil 2 such that the extension portions 2b and 2c are displaced with respect to the winding portion 2a can be prevented. It is possible to obtain a stable electrodeless discharge lamp lighting device in which the inductance value is small and the output of the high-frequency power source is small.

[0044]

As described above, according to the first aspect of the present invention, there is provided a bulb including a light-transmitting material and a discharge gas sealed therein.
An induction coil having a bobbin disposed close to the valve, a winding portion wound around the bobbin, and a pair of extending portions extending from the winding portion and extending in parallel with a central axis of the winding portion; When,
Fixing means for fixing each extension end extending from the winding portion of each extension portion so as to be close to each other, and supplying a high-frequency current from a high-frequency power supply to the induction coil from the extension portion, and A pair of extending portions through which the induction gas is excited and emits light from the discharge gas sealed in the coil, and extends from the winding portion of the induction coil, and through which the high-frequency current from the high-frequency power supply flows through the induction coil, The extension portions of the induction coil extend in parallel with the central axis of the winding portion, and are fixed so that the extension ends extending from the winding portions of the extension portions are close to each other. Since it is extended from the turning part, it is possible to prevent the deformation of each extending part due to the force applied to each extending part, and to stably turn on the electrodeless discharge lamp with little fluctuation of the output of the high frequency power supply due to the fluctuation of the inductance value of the induction coil. A device is obtained.

According to a second aspect of the present invention, in the first aspect of the present invention, the extension portion of the induction coil extends vertically from the winding portion, so that it is added to each extension portion of the induction coil. It is possible to suppress the transmission of force to the winding part, prevent the shape of the winding part from changing, and further reduce the variation in the inductance value of the induction coil,
It is possible to obtain a stable electrodeless discharge lamp lighting device with less fluctuation of the output of the high frequency power supply.

According to a third aspect of the present invention, in the first or second aspect, the induction coil is wound around the bobbin in an axial direction, so that the induction coil can be easily wound. become.

According to a fourth aspect of the present invention, in the first or second aspect of the present invention, since the induction coil is wound around the bobbin in a radial direction, the winding portion of the induction coil and A more efficient electrodeless discharge lamp lighting device is obtained with less interruption of light from the bulb by the bobbin.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the fixing means comprises a hole, a projection, or a notch provided in the bobbin. The induction coil can be easily fixed to the bobbin without using an adhesive or the like.

According to a sixth aspect of the present invention, in the first aspect of the present invention, each extending end is pulled in the radial direction of the bobbin from the center of the winding portion of the induction coil. Because they are arranged and fixed on the same straight line, each extension end of each extension portion of the induction coil can be fixed in the closest state, and each extension portion is closest to the vertical than the winding portion It can be extended at an angle. Thus, even when a force is applied to the extension portion, transmission of the force to the winding portion can be suppressed, and deformation of the winding portion can be prevented. Further, by extending each extending portion at an angle closest to the vertical direction from the winding portion, the extending portion can be formed linearly, so that even if a longitudinal force is applied to the extending portion. The extension is less likely to deform. Therefore, a variation in the inductance value of the induction coil can be suppressed to a small value, and a stable electrodeless discharge lamp lighting device with a small output variation of the high-frequency power supply can be obtained.

According to a seventh aspect of the present invention, in any one of the first to fourth aspects of the present invention, the fixing means is a fixing member made of a member different from the bobbin arranged close to the bobbin. Therefore, there is no need to provide a fixing means on the bobbin, so that the structure of the bobbin is simplified.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the fixing member has a through hole, and each extending end is inserted by inserting an extending portion of the induction coil into the through hole. Can be fixed by inserting an induction coil through the through hole, and can be firmly fixed with a simple structure.

According to a ninth aspect of the present invention, in the invention according to the eighth aspect, the fixing member has two through holes, and each extension of the induction coil is inserted into each of the through holes one by one. Therefore, by inserting each extension portion of the induction coil into the through hole provided separately in the fixing member, the extension end of each extension portion is more firmly fixed, and the influence between each extension portion is improved. Can be reduced.

According to a tenth aspect of the present invention, in the invention according to the seventh aspect, the fixing member has a groove, and the extension end of the induction coil is fixed by fitting the extension of the induction coil into the groove. Therefore, it is possible to fix the induction coil by a simple method without performing an operation of passing the extension portion of the induction coil through the hole.

According to an eleventh aspect of the present invention, in the invention according to any one of the seventh to tenth aspects, the fixing member extends along a length direction of an extension of the induction coil. In addition, it is possible to more securely and reliably prevent the deformation of the extension portion, and to obtain a stable electrodeless discharge lamp lighting device in which the inductance value of the induction coil is small and the output of the high-frequency power source is small.

According to a twelfth aspect of the present invention, in any one of the seventh to eleventh aspects, since the fixing member is fixed to the bobbin, each extension of the induction coil is wound. It is possible to prevent a change in the shape of the fixed portion of the induction coil, such as displacement with respect to the portion, and to obtain a stable electrodeless discharge lamp lighting device with a small variation in the inductance value of the induction coil and a small variation in the output of the high frequency power supply. .

According to a thirteenth aspect of the present invention, there is provided a bulb made of a translucent material and having a discharge gas sealed therein, a bobbin disposed close to the bulb, a winding portion wound around the bobbin, An induction coil extending vertically from the winding portion and having a pair of extending portions extending in parallel with the central axis of the winding portion, and a hole, a projection, or a notch provided in the bobbin, and Fix each extension end so that each extension end extending from the winding portion of the extension portion is arranged on the same straight line drawn in the radial direction of the bobbin from the center of the winding portion of the induction coil. And a fixing means for applying a high-frequency current from a high-frequency power supply to the induction coil from the extension portion to excite and discharge the discharge gas sealed in the bulb.
Since the extension portion of the induction coil extends vertically from the winding portion, the same effect as in claim 2 is obtained, and the fixing means comprises a hole, a projection, or a notch provided in the bobbin. Thus, the same effect as in claim 5 can be obtained, and each extension end of each extension portion is disposed on the same straight line drawn in the radial direction of the bobbin from the center of the winding portion of the induction coil. By fixing the extending ends by the fixing means as described above, the same effect as in claim 6 can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a structure of an electrodeless discharge lamp lighting device according to a first embodiment of the present invention.

FIG. 2 is a bottom view showing a partial structure of the electrodeless discharge lamp lighting device according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to a second embodiment of the present invention.

FIG. 4 is a bottom sectional view showing a partial structure of an electrodeless discharge lamp lighting device according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to a third embodiment of the present invention.

FIG. 6 is a bottom sectional view showing a partial structure of an electrodeless discharge lamp lighting device according to a third embodiment of the present invention.

FIG. 7 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to a fourth embodiment of the present invention.

FIG. 8 is a side sectional view showing a partial structure of an electrodeless discharge lamp lighting device according to a fourth embodiment of the present invention.

FIG. 9 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to a fifth embodiment of the present invention.

FIG. 10 is a bottom sectional view showing a partial structure of an electrodeless discharge lamp lighting device according to a fifth embodiment of the present invention.

FIG. 11 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to a sixth embodiment of the present invention.

FIG. 12 is a cross-sectional view illustrating a structure of a fixing member used in an electrodeless discharge lamp lighting device according to a sixth embodiment of the present invention.

FIG. 13 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to a seventh embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a structure of a fixing member used for an electrodeless discharge lamp lighting device according to a seventh embodiment of the present invention.

FIG. 15 is a perspective view showing a structure of an electrodeless discharge lamp lighting device according to an eighth embodiment of the present invention.

FIG. 16 is a perspective view showing a structure of a fixing member used in an electrodeless discharge lamp lighting device according to an eighth embodiment of the present invention.

FIG. 17 is a side view showing the structure of a conventional electrodeless discharge lamp lighting device.

FIG. 18 is a side view showing the structure of another conventional electrodeless discharge lamp lighting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve 2 Induction coil 2a Winding part 2b, 2c Extension part 3 Bobbin 3a, 3b Flange part 4 Projection 5b, 5c Extension end

Claims (13)

[Claims] 1. A bulb made of a translucent material and having a discharge gas sealed therein, a bobbin disposed in close proximity to the bulb, a winding part wound around the bobbin, and extending from the winding part. An induction coil having a pair of extending portions extending parallel to the central axis of the winding portion, and fixing means for fixing the extending ends of the extending portions extending from the winding portions to be close to each other. An electrodeless discharge lamp lighting device, characterized in that a high-frequency current from a high-frequency power source is supplied to the induction coil from the extension portion to excite and discharge a discharge gas sealed in the bulb. 2. The electrodeless lamp lighting device according to claim 1, wherein an extension of the induction coil extends vertically from a winding portion. 3. The electrodeless discharge lamp lighting device according to claim 1, wherein the induction coil is wound around the bobbin in an axial direction. 4. The electrodeless discharge lamp lighting device according to claim 1, wherein the induction coil is wound around the bobbin in an overlapping manner in a radial direction. 5. The electrodeless discharge lamp lighting device according to claim 1, wherein said fixing means comprises a hole, a protrusion, or a notch provided in said bobbin. . 6. The apparatus according to claim 1, wherein each extension end is arranged and fixed on the same straight line drawn in the radial direction of the bobbin from the center of the winding portion of the induction coil. 5. The electrodeless discharge lamp lighting device according to any one of 5. 7. The electrodeless discharge lamp according to claim 1, wherein said fixing means is a fixing member made of a member different from a bobbin arranged close to said bobbin. Lighting device. 8. The wireless communication system according to claim 7, wherein the fixing member has a through-hole, and each extending end is fixed by inserting an extending portion of the induction coil into the through-hole. Electrode discharge lamp lighting device. 9. The electrodeless discharge lamp according to claim 8, wherein the fixing member has two through holes, and each extension of the induction coil is inserted into each through hole one by one. Lighting device. 10. The electrodeless discharge lamp according to claim 7, wherein the fixing member has a groove, and each extending end is fixed by fitting an extending portion of the induction coil into the groove. Lighting device. 11. The electrodeless discharge lamp lighting according to claim 7, wherein the fixing member extends along a length direction of an extension of the induction coil. apparatus. 12. The electrodeless discharge lamp lighting device according to claim 7, wherein the fixing member is fixed to the bobbin. 13. A bulb made of a translucent material and having a discharge gas sealed therein, a bobbin disposed close to the bulb, a winding part wound around the bobbin, and a vertical part extending from the winding part. An induction coil having a pair of extensions that extend and extend in parallel with the central axis of the winding portion, and a hole, a projection, or a notch provided in the bobbin, and winding of each extension portion. Fixing means for fixing each extending end so that each extending end extending from the portion is arranged on the same straight line drawn in the radial direction of the bobbin from the center of the winding portion of the induction coil. An electrodeless discharge lamp lighting device, characterized in that a high-frequency current from a high-frequency power source is supplied to the induction coil from the extension portion to excite and discharge a discharge gas sealed in the bulb.