JP3185465B2 - Lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device and, more particularly, to a means for transmitting energy to a light source device.

[0002]

2. Description of the Related Art At present, various high-efficiency illuminators for converting a power supply output into a predetermined alternating current to turn on a light source device have been developed, and an example thereof will be described with reference to FIG. The figure shows a configuration of a lighting device in which a power conversion circuit INV for converting DC to AC is connected to a DC power supply E to turn on a lamp LP as a light source device.

The power conversion circuit IN of the lighting device shown in FIG.
V indicates the switching elements S ₁ and S ₂ connected to the DC power supply E, and the ON / OFF of those switching elements S ₁ and S ₂ .
Driving circuits K ₁ and K ₂ performs off, the driving circuit K _1,
It comprises a control circuit P for controlling K ₂ , a resonance circuit composed of a choke coil L and a capacitor C _1, and a capacitor C ₂ for cutting DC components. Next, the operation of this circuit will be described. The control circuit P outputs a control signal to operate the drive circuits K ₁ and K _2. The control signals are on / off signals having phases shifted from each other, whereby the drive circuits K ₁ and K ₂ alternately operate. The switching elements S ₁ and S ₂ alternately turn on and off to supply a rectangular voltage to a resonance circuit including the choke coil L and the capacitor C ₁ . As a result, an AC voltage on which a DC component is superimposed is output from the resonance circuit, and the capacitor C
_The DC component is cut by ₂ to supply AC power to the lamp LP. Here, the capacitor C ₃ is intended for keeping electric current for preheating the lamp LP.

[0004]

However, in the case of the above-mentioned conventional lighting device, the connection point of the lamp LP (points A to D in FIG. 11) is usually replaced by the terminal of the socket in order to replace the lamp LP. When the connection of the lamp LP is unstable due to the poor contact and the unstable connection of the lamp LP, the energy is converted by the switching elements S ₁ and S ₂ driven at a stable frequency. The resonance state of the resonance circuit changes suddenly, and an excessive current flows or an excessive voltage is generated in the circuit. In addition, there is a problem that an arc is generated at the connection point, which causes overheating and fire.

As described above, the circuit becomes unstable depending on the connection state of the lamp LP, which is a load, so that an excessive current or voltage is generated or an arc which causes overheating or a fire is generated. was there.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a structure of a lighting device in which a contact failure does not occur at a connection point of a lamp LP.

[0007]

According to one aspect of the present invention, there is provided a lighting apparatus comprising: a power supply; a power conversion circuit for converting an output of the power supply; and a light source connected to the power conversion circuit as a load. A lighting device comprising:
Primary-side magnetic coupling means for converting power transmitted from the power conversion circuit to the light source device into AC energy output from the power conversion circuit, and magnetic energy generated from the primary-side magnetic coupling means Is converted to AC power and supplied to the light source device by a magnetic coupling unit configured by a secondary magnetic coupling unit.

Further, the first aspect of the present invention is configured such that the relative position of the secondary magnetic coupling means with respect to the primary magnetic coupling means can be changed, so that the primary magnetic coupling means and the secondary magnetic coupling means can be changed. the magnetic coupling of the coupling means a made variable
Wherein the secondary magnetic coupling means is the primary magnetic coupling means.
With a fixed holding force
In this case, the degree of magnetic coupling can be changed .

[0009] According to a second aspect of the invention, in the illumination apparatus according to claim 1, wherein the secondary side magnetic coupling means is taken up in the light source apparatus
Attached to the lighting device together with the light source device.
It is characterized by being configured to be detachable .

According to a third aspect of the present invention, in the lighting apparatus, at least one of the primary magnetic coupling means and the secondary magnetic coupling means can be moved in the illumination apparatus. Wherein the primary magnetic coupling means and the secondary magnetic coupling means are brought into close contact with each other by an attraction effect of the primary magnetic coupling means by magnetic energy.

According to a fourth aspect of the present invention, in the lighting device of the first or second or third aspect , at least one of the primary magnetic coupling means and the secondary magnetic coupling means is movable. The cover is configured to be covered by a cover, and the cover is configured to move when the secondary-side magnetic coupling unit is brought close to a position where it can be magnetically coupled with the primary-side magnetic coupling unit.

According to a fifth aspect of the present invention, there is provided the lighting device according to the first aspect , wherein the secondary magnetic coupling means includes preheating secondary magnetic coupling means for supplying AC power for preheating the light source device; A lighting secondary magnetic coupling means for supplying AC power for lighting the light source device, wherein when the degree of magnetic coupling between the preheating secondary magnetic coupling means and the primary magnetic coupling means is high, the lighting secondary magnetic coupling means; When the degree of magnetic coupling between the secondary magnetic coupling means and the primary magnetic coupling means is low, and when the degree of magnetic coupling between the lighting secondary magnetic coupling means and the primary magnetic coupling means is high, The preheating secondary magnetic coupling means and the lighting secondary magnetic coupling means are arranged such that the degree of magnetic coupling between the preheating secondary magnetic coupling means and the primary magnetic coupling means is reduced. It is a feature.

The illumination apparatus of claim 6, in the lighting device according to claim 1, and at least one primary magnetic coupling means, and a plurality of secondary magnetic coupling means, the secondary magnetic coupling means It is characterized by comprising a plurality of light source devices connected to each other and having different emission colors.

[0014]

The primary magnetic coupling means of the magnetic coupling means converts the AC power output from the power conversion circuit into magnetic energy, and the secondary magnetic coupling means of the magnetic coupling circuit has the primary magnetic coupling means. Is converted into AC power and supplied to the light source device. If the position of the secondary magnetic coupling means is relatively changed with respect to the primary magnetic coupling means, the degree of magnetic coupling between the primary magnetic coupling means and the secondary magnetic coupling means changes and is supplied to the light source device. AC power changes. In this case, the secondary magnetic coupling means is
Attached to the air coupling means with a certain holding force
You.

Further, in the lighting device according to claim 3 , at least one of the primary magnetic coupling means and the secondary magnetic coupling means is configured to be movable in the lighting device. Due to the suction effect of magnetic energy, 1
The secondary magnetic coupling means and the secondary magnetic coupling means are in close contact with each other.

A movable cover for covering at least one of the primary magnetic coupling means and the secondary magnetic coupling means of the lighting device according to claim 4 , wherein the secondary magnetic coupling means is separated from the lighting device. If so, the primary side magnetic coupling means or the secondary side magnetic coupling means inside is mechanically protected.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which an embodiment of the present invention is applied to a conventional lighting device will be described with reference to FIG. As shown in (a),
The circuit of this embodiment is equivalent to a circuit in which a transformer T is inserted between a power conversion circuit INV and a lamp LP as a load. The transformer T is separated into a primary side and a secondary side at a core portion, and it is obtained by constituting the magnetic coupling means CP ₁ and the secondary side magnetic coupling means CP _2. In this embodiment, the secondary magnetic coupling means CP ₂ is built in the lamp LP as the light source device, and when the lamp LP is replaced, the secondary magnetic coupling means CP 2 is used.
₂ is configured to be separated from the lighting device together with the lamp LP.

FIG. 1B shows a lamp 1 as a light source device, a glass tube 2 formed in a substantially circular shape (only a connecting portion between the lamp and the lighting device is shown in the figure), and a substantially provided at both ends of the glass tube 2. A cylindrical base 3 is fixed between the base 3 and 2
A secondary side socket 4 in which a hollow portion for fixing the secondary core is formed, a substantially I-shaped secondary core 5, and a secondary winding 6 wound around the secondary core 5; Both ends of the secondary winding 6 are connected to electrodes fixed in the base 3, respectively, and the connection of B 'and D' shown in FIG. Here, the secondary magnetic coupling means CP ₂ is a secondary core 5 and a secondary winding 6.

The configuration shown in FIG. 1C has a primary socket 7, a substantially U-shaped primary core 8 fixed to the primary socket 7, and a primary core 8 wound around the primary core 8. In the next winding 9,
The primary core 8 and the primary winding 9 are composed of primary magnetic coupling means CP _1.
Is composed. The primary core mount 7 is fixed to a lighting device (not shown), and both ends of the primary winding 9 are connected to a power conversion circuit INV (not shown).

(D) and (e) show a state in which the lamp 1 is attached to the lighting device, and (e) is a cross-sectional view showing a state in which the core is connected. As shown in (d) and (e), when the lamp 1 is mounted on the lighting device, the substantially I-shaped secondary core 5 fits into the concave portion of the substantially U-shaped primary core 8, and a magnetic circuit is formed. It is configured to form. When an AC voltage is applied to the primary winding 9 in this state, the primary core 8
The lines of magnetic force are generated. Since a magnetic circuit is formed by the primary core 8 and the secondary core 5, an AC voltage is generated in the secondary winding 6, and the lamp 1 is turned on. With the configuration described above, energy can be transmitted from the power conversion circuit INV to the lamp 1 as the light source device without passing through the contact portion between the metal terminals, so that a highly reliable lighting device that does not cause poor contact is provided. You can. In the embodiment, the primary core is substantially U-shaped, and the secondary core is substantially I-shaped. However, the configuration may be reversed.

Here, the shapes of the cores on the primary side and the secondary side are not limited to those of the embodiment as long as they are changed depending on the shape of the lighting device and the lamp, and therefore, for example, the shapes shown in FIG. Good. In the figure, 5 is the primary core, 6 is 1
The secondary winding, 8 is a secondary core, and 9 is a secondary winding, but the primary side and the secondary side may be reversed. The cores having the shapes shown in (a) to (e) are EE type, LL type, and EI type, respectively.
Type, CI type, and pot core type. Also,
Shapes as shown in FIGS. 3A to 3C can also be used. All of the shapes shown in FIG. 3 are intended to reduce the gap between the primary core and the secondary core, increase the degree of adhesion, and reduce leakage of lines of magnetic force.

FIG. 4 shows an example of a lamp with a single cap. As shown in FIG. 4A, a secondary winding is provided on the bottom of a substantially cylindrical cap 11 provided at the opening of the glass tube 10 as shown in FIG. Line 13
A secondary core 12 having a substantially I-shape is attached, and both ends of a secondary winding 13 are connected to a filament inside the lamp, and a primary winding 15 is wound as shown in FIG. 1 to do
The next core 14 is formed in a substantially U-shape. In the following drawings, the connection between the lamp and the lighting device, mainly the magnetic coupling means, is shown, and other parts are not shown. Also in the case of this embodiment, similarly to the example of FIG. 1, when the lamp is attached to the lighting device, the secondary core 12 fits into the concave portion of the primary core 14 and forms a magnetic circuit to supply power to the lamp. . 16A and 16B, reference numeral 16 denotes an insulating film which is coated mechanically and electrically to protect the core and the winding. The protection means is not limited to the coating of the insulating film, and may be covered with another material if the magnetic coupling of the core does not hinder practically.

FIG. 4C shows a lighting device having the structure shown in FIGS. 4A and 4B. After a lamp of the type shown in FIG. 4A is inserted into the lamp mounting socket 17 of the lighting device body, the lamp is removed. In the case of a lighting device of a type that is fixed by rotating around a central axis, in a diagram showing how to arrange a core, a cross section of a lamp mounting socket 17 is taken so that a coupling state of the core can be understood. FIG. Hereinafter, the windings will be described as being wound around the core, and the windings will be omitted in the drawings as appropriate. In the lighting device of the type shown in (c), usually, at least one pair of fitting shapes is formed between the lighting device body and the lamp so that the lamp can be fixed at a predetermined position. In this example, a projection 18 is formed on the base 11 of the lamp, and a corresponding recess 19 is formed on the lamp mounting socket 17. Therefore, in this type of lighting device, the primary core 14 and the secondary core 12 are arranged such that the degree of magnetic coupling is maximized at the position where the projection 18 and the concave portion 19 are fitted, that is, at the lamp fixing position. That is, as shown in (c), when the lamp is inserted into the lamp mounting socket 17, the secondary core is arranged at the position shown by the dotted line in (c). Next, the lamp is rotated, and a substantially U-shaped 1 is set at a position where the projection 18 and the concave portion 19 are fitted.
The core may be arranged so that the substantially I-shaped secondary core 12 fits into the concave portion of the secondary core 14. However, the fixing means is not limited, and the members forming the fixing means are not limited to the embodiment. Also, the secondary core 12 may be fixed so as to rotate with the lamp,
The secondary core 12 around which the secondary winding 13 is wound is configured to be rotatable. After the lamp is attached, the secondary core 1 is manually manually operated from outside.
A lever or the like protruding to the outside may be attached to the secondary core 12 so that the degree of magnetic coupling can be adjusted by rotating the secondary core 2, or a driving device may be provided to rotate the secondary core 12.

FIG. 5 shows a different embodiment, in which a lamp is shown.
Secondary magnetic coupling means CP built in _TwoIs possible within a certain range
This is an example of moving. In the figure, 20 is substantially cylindrical
Lamp base 21 is a lamp fixed to the lighting device body
Mounting socket, 22 is a secondary core, 23 is a secondary winding, 24
Is a spring, 25 is a primary core, and 26 is a primary winding.
You. In this example, a secondary core 22 wound with a secondary winding 23 is used.
Is close to the primary core 25 via the spring 24
And the primary core 2
5 so as to be movable. Configuration like this
As a result, an AC voltage is applied to the primary winding 26.
When magnetic lines of force are generated in the primary core 25, the suction action
As a result, the secondary core 22 comes into close contact with the primary core 25,
High degree of magnetic coupling, high transmission efficiency
It has the advantage of becoming. The secondary core 22
The primary core 25 may be configured to be movable,
You may comprise so that both may be movable.

FIG. 6 shows an embodiment in which the magnetic coupling means is provided with a mechanical protection means. FIG. 6A is a sectional view of a connection portion between the lamp mounting socket and the lamp. (B) is the figure which looked at the lamp mounting socket from the lamp insertion direction. (A)
27 is a lamp mounting socket, 28 is a lamp base, 2
9 is a primary core, 30 is a primary winding, 31 is a secondary core, 32
Is a secondary winding, 33 is a cylindrical cover having a substantially square cross section attached so as to move in the interior direction of the lamp mounting socket 27, and 34 is a spring. In this embodiment, the primary core 29 projects outside the lamp mounting socket 27, and the secondary core 31 is configured to be buried inside the lamp base 28. When the lamp is removed from the lighting device, the cover 33 is attached to the spring 3 as shown in FIG.
4 to cover the side surface of the secondary core 29. When the lamp is inserted into the lamp mounting socket, the cover 33 is pushed by the lamp base 28 and moves toward the inside of the lamp mounting socket 27 to expose the primary core 29 and the secondary core 31.
Mates with With this configuration, the primary core 29 can be mechanically protected by the cover 33 when the lamp is removed. In this example, the cover 33 has a cylindrical shape with a substantially square cross section and covers the side surface of the primary core 29 and slides in the lamp insertion direction. However, the shape and the moving method of the protection means are the same as those of the embodiment. Not limited.

FIG. 7A shows another embodiment.
This embodiment, primary side magnetic coupling means female screw on the inner side of the CP ₁ as the primary winding 40 of a bottom of arranging the primary core 39 wound on the inner bottom surface substantially cylindrical lamp mounting sockets 35 to form the shape 35a, the outer side surface of the secondary magnetic coupling means CP ₂ as the secondary winding 38 with a bottom arranged the secondary core 37 wound on the bottom surface a substantially cylindrical lamp cap 36, corresponding An example of a lighting device of a type in which a male screw shape 36a is formed and a lamp is screwed into a lamp mounting socket 35 and mounted. In a lighting device in which a lamp is mounted with such a screw shape, unlike a type in which a lamp fixing position is determined by a fitting shape as in the example shown in FIG. Since the fixing position of the lamp changes, the positional relationship between the cores may deviate from a predetermined position, and the degree of magnetic coupling may be reduced. However, in the example shown in FIG. 7, the shape of the primary and secondary cores is a rotating body having a substantially E-shaped cross section (a rotating body about the symmetry axis of E as a rotation center), thereby fixing the lamp. It is configured so that power can be supplied reliably regardless of where it is located.

[0027] On the contrary, if changing the secondary magnetic coupling means relative positions of CP ₂ to the primary side magnetic coupling means CP _1, it can be used a feature that power to be transmitted is changed to dimming such . In the example shown in FIG. 7A, when the lamp is rotated, the distance between the primary core 39 and the secondary core 37 changes, so that the transmitted power can be changed. FIG.
In the case of a configuration in which the lamp can be rotated without changing the distance between the cores as in the example shown in FIG.
By using the core having the shape shown in (b) and (c), light control and the like can be performed. (B) shows a shape obtained by diagonally cutting the inner cylindrical portion (the portion around which the winding is wound) of the core shown in (a) as a primary core and a secondary core. When the lamp is rotated, the degree of magnetic coupling between the two cut cylinders changes, and the power supplied to the lamp changes because the cut cylinder is asymmetric with respect to the central axis. (C) is a modification of the shape shown in (b), in which the core has a shape obtained by cutting the surface of the cylinder head while leaving it to some extent. The shape shown in (c) has less concentration of the lines of magnetic force and provides stable magnetic coupling.

As an application of the embodiment shown in FIG. 4C, FIG. 8 shows the magnetic coupling means of the present invention applied to a lamp for preheating. (A) is the corresponding circuit diagram,
Secondary winding 4 for preheating in addition to secondary winding 41 for lamp lighting
2 are connected to the respective electrodes at both ends of the lamp. In this type of lighting device, when the lamp is lit, the power for preheating is reduced, and when the lamp is lit, the power for preheating is reduced. Power needs to be reduced. In the present embodiment, as shown in FIG.
The secondary core 45 for lighting is formed by disposing the secondary core 44 and the secondary core 45 for lighting on the lamp base 46 with the position shifted and rotating the lamp with the lamp inserted into the lamp mounting socket. When the degree of magnetic coupling between the secondary core 44 for preheating and the primary core 43 is high, the lamp is rotated so that the degree of magnetic coupling between the secondary core 44 for preheating and the primary core 43 decreases, and vice versa. Can change the state. With this configuration, the preheating current can be increased according to the dimming of the lamp, and stable output control can be performed. Further, the secondary core may not be directly fixed to the lamp base, but may be attached to a member that rotates separately from the lamp.

FIG. 9 shows an application example of the example shown in FIG. The figure is a diagram for explaining the positional relationship between the cores, and other components are not shown. In the example shown in the figure, three types of lamps that emit blue, red, and green light are used as loads, and secondary-side magnetic coupling means are connected to each of the loads. Secondary cores 48 and 49 each having a secondary winding are wound. And 50 are rotating plates 5
1 is fixed so as to be able to rotate independently of each other. When each secondary core is rotated, the degree of magnetic coupling of each secondary core to the primary core 47 changes, and the light emission of each lamp accordingly. Since the intensity changes, the emission color changes in a pseudo manner due to the color mixing effect of the three colors. Rotating plate 51
The secondary cores may be rotatably attached to the lamp base without providing the above. Further, the respective secondary cores may be rotated in conjunction with each other.

While the embodiment of the lighting device using the magnetic coupling means of the present invention has been described above, when a plurality of such lighting devices are arranged side by side, as shown in FIG. When the directions are different between the adjacent lighting devices, the lines of magnetic force cancel each other out, so that the lines of magnetic force leaking to the outside can be reduced. In the figure, 52 indicates an individual lighting device, and 53 and 54 indicate the directions of magnetic field lines generated from the individual lighting devices 52. In addition, when the adjacent lighting devices are driven by the same power conversion circuit INV, the timing at which the magnetic field line intensity changes is matched, so that the magnetic field lines are more easily canceled. Further, in the embodiment, the power supply E is a DC power supply, but is not limited. further,
The configuration of the power conversion circuit INV is not limited to the embodiment.

[0031]

As described above, the lighting device of the present invention is configured such that the energy can be transmitted from the power conversion circuit to the lamp as the light source device without passing through the contact portion between the metal terminals. No poor contact between the device and the lamp
This has the effect of increasing reliability.

[Brief description of the drawings]

FIG. 1 is a circuit diagram and a structural diagram showing an embodiment of the present invention.

FIG. 2 is a plan view showing an example of a magnetic coupling unit according to the present invention.

FIG. 3 is a plan view showing an example of a magnetic coupling unit according to the present invention.

FIG. 4 is a perspective view and a sectional view showing a different embodiment of the present invention.

FIG. 5 is a sectional view showing a different embodiment of the present invention.

FIG. 6 is a sectional view and a side view showing a different embodiment of the present invention.

FIG. 7 is a sectional view showing a different embodiment of the present invention.

FIG. 8 is a circuit diagram and a sectional view showing a different embodiment of the present invention.

FIG. 9 is a sectional view showing a different embodiment of the present invention.

FIG. 10 is a diagram illustrating a method for arranging a plurality of lighting devices according to the present invention.

FIG. 11 is a circuit diagram showing a configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp 2 Glass tube 3 Base 4 Secondary socket 5 Secondary core 6 Secondary winding 7 Primary socket 8 Primary core 9 Primary winding 10 Glass tube 11 Base 12 Secondary core 13 Secondary winding 14 Primary core 15 Primary winding 16 Insulating film 17 Lamp mounting socket 18 Projection 19 Recess 20 Lamp base 24 Spring 33 Cover 34 Spring 35a Female screw shape 36a Male screw shape 44 Preheating secondary core 45 Lighting secondary core 51 Rotation Board 52 Lighting device

Claims (6)

(57) [Claims] An illumination device comprising a power supply, a power conversion circuit for converting an output of the power supply, and a light source device connected as a load to the power conversion circuit, wherein the power conversion circuit transmits the power to the light source device. For power transmission, primary-side magnetic coupling means for converting AC power output from the power conversion circuit to magnetic energy, and magnetic energy generated from the primary-side magnetic coupling means to AC power for converting the power to the light source device The primary magnetic coupling means is configured to be capable of changing the relative position of the secondary magnetic coupling means with respect to the primary magnetic coupling means. the degree of magnetic coupling of the secondary magnetic coupling means comprising made variable, the secondary magnetic bond
The step has a constant holding force on the primary magnetic coupling means.
The degree of magnetic coupling changes under the
Lighting device characterized in that it is. 2. The lighting device according to claim 1, wherein the secondary-side magnetic coupling means is attached to the light source device, and is configured to be separable from the lighting device together with the light source device. 3. A primary magnetic coupling means and a secondary magnetic coupling means in a lighting device.
At least one of the secondary magnetic coupling means is configured to be movable.
The primary magnetic coupling means absorbs magnetic energy.
The primary magnetic coupling means and the secondary magnetic
The lighting device according to claim 1, wherein the air coupling unit is closely attached . 4. A primary magnetic coupling means and a secondary magnetic coupling hand.
At least one of the steps is covered by a movable cover
And the secondary magnetic coupling means is replaced with the primary magnetic coupling.
When approaching the position where it can be magnetically coupled with the means, the cover will
The lighting device according to claim 1, wherein the lighting device is configured to move . 5. A light source device as secondary magnetic coupling means.
Preheating secondary magnetic coupling means for supplying AC power for heat
And lighting for supplying AC power for lighting the light source device.
Secondary magnetic coupling means for the preheating secondary magnetic
When the degree of magnetic coupling between the coupling means and the primary magnetic coupling means is high
Are the secondary magnetic coupling means for lighting and the primary magnetic coupling
In order to reduce the degree of magnetic coupling of the combining means,
Coupling between secondary side magnetic coupling means and primary side magnetic coupling means
When the temperature is high, the secondary magnetic coupling means for preheating and the
To reduce the degree of magnetic coupling of the primary magnetic coupling means,
A secondary magnetic coupling means for preheating and the secondary magnetic coupling for lighting;
Lighting apparatus according to claim 1, characterized in that the coupling means is arranged. 6. At least one primary magnetic coupling means.
, A plurality of secondary magnetic coupling means, and the secondary magnetic coupling
Light sources of different emission colors connected to each of the means
Lighting apparatus according to claim 1, characterized by including a device.