JPH09320314A - Desk lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an easy generation of error operation, as well as to improve the workability. SOLUTION: This desk stand is composed by providing a lamp body 4 having a socket 8 installing a discharge lamp 7; an arm 3 to support the lamp body 4; an ignition device 5 to ignite the discharge lamp 7 at a high-frequency, as well as connected to the socket 8 through a lamp line 8a passing through the arm 3; and a switch 6 to put on and off the discharge lamp 7. While the switch 6 is provided at the tip of the front surface side of the lamp body 4, two lines of auxiliary arms 3d electromagnetic shielded, and provided almost parallel to the arm 3 are provided, and the lamp line 8a is inserted to one side auxiliary arm 3b, while an ignition control line 6c is inserted to the other side auxiliary arm 3d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desk stand, and more particularly to a desk stand provided with a switch and a lighting device for lighting a discharge lamp at a high frequency.

[0002]

2. Description of the Related Art FIGS. 9 to 12 show a conventional desk stand (first conventional example). This desk stand has a substantially flat plate-shaped base 1 and an internal structure which is erected on its upper surface. It comprises a support column 2 having a space therein, an elongated arm 3 rotatably provided at the upper end thereof, a lamp unit 4, a lighting device 5, and a switch 6.

The base 1 is formed in a thin plate shape and
A switch 6 is provided on the upper surface near the front side,
The pillar 2 is erected on the upper surface on the back side. Further, a lighting device 5 connected to a switch 6 by a lighting control line (not shown) is housed inside the column 2, and the upper end of the column 2 is made of metal and has a substantially cylindrical shape. Arm 3
It is provided so as to be rotatable around its lower end. Further, at the upper end of the arm 3, a socket 8 for mounting the discharge lamp 7 is housed at one end, and a shade 4a arranged so as to cover the discharge lamp 7 mounted in the socket 8 from the upper side. The lamp body portion 4 is rotatably provided at one end thereof, and the socket 8 is connected to the lighting device 5 by a lamp wire 8 a that passes through the inside of the arm 3.

Although not shown, the lighting device 5 includes:
The power supply line is connected through the switch 6, and therefore, when the connected power supply is 100V, the lighting device 5 has a circuit as shown in FIG.
In such a case, the circuit is as shown in FIG. 11, and although the cost is high, the circuit configurations are different from each other. 10 and 11, reference numeral 5a denotes a direct-current power supply unit that is connected to an alternating-current power supply AC to obtain a direct current, and 5b denotes an inverter unit that converts the direct current into a high frequency. The desk stand configured as described above is shown in FIG.
As shown in FIG. 5, the desk 9 is used by being placed on the back side of the upper surface of the desk 9.

FIG. 13 shows another conventional desk stand (second conventional example). The difference from the first conventional example is that the arm 3 is provided with the upper arm 3a and rotatably attached thereto. In addition, the lower arm 3b is rotatable with respect to a point constituted by the lower arm 3b accommodating the lighting device 5 and an arm support portion 3c for fixing the lower end portion of the arm 3 to an end portion of a desk or the like instead of the base 1. The touch switch 6a, which is the switch 6, is provided at the tip of the lamp body 2 rotatably provided at the tip of the upper arm 3a. Others are substantially the same as those of the first conventional example. It is similarly configured.

Therefore, inside the metal arm 3, a lamp wire 8a connecting the lighting device 5 and the socket 8 is provided.
And a lighting control line 6c from the touch switch 6a (sensor part) provided at the tip of the lamp body 2 to the lighting device 5 via the touch switch body 6b are inserted so as to be mixed.

[0007]

However, the conventional desk stand constructed as described above (first conventional example).
In, the switch 1 is provided on the base 1,
In general, the base 1 is placed on the back side of the desk, and is located further back than the lamp body section 2. Therefore, when the switch 6 is located far away from the hand and the switch 6 is operated, However, there was a problem that the operability was poor because it was necessary to reach out to the back of the desk for operation.

In another conventional desk stand (second conventional example), a touch switch 6a, which is a switch 6, is provided at the tip of the lamp unit 2, and the lamp unit 2 is closest to the hand. Although the operability is improved because it is used as described above, the lamp wire 8a connecting the lighting device 5 and the socket 8 and the lighting control line 6c connecting the lighting device 5 and the switch 6 are made of metal. Since the high frequency current flows through the lamp wire 8a, noises from the lamp wire 8a and its surroundings affect the lighting control wire 6c, and malfunctions are likely to occur. There was a problem.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a desk stand having good operability and being less likely to malfunction.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a lamp body portion 4 having a socket 8 in which a discharge lamp 7 is mounted, and a lamp body portion 4 according to the present invention. An arm 3 that supports the lamp body 4, a lighting device 5 that is connected to the socket 8 by a lamp wire 8a that passes through the arm 3 and that turns on the discharge lamp 7 at a high frequency, and a switch that blinks the discharge lamp 7. And a lighting control line 6c provided between the lighting device 5 and the switch 6 is separated from the lamp line 8a. It is characterized by being arranged.

According to the invention of claim 2, claim 1
The desk stand described in the above is characterized in that the switch 6 is provided at the front end of the lamp unit 4.

According to a third aspect of the invention, in the desk stand according to the first and second aspects, the arm 3 is provided with two electromagnetically shielded auxiliary arms 3d. In addition to the above configuration, the lamp wire 8a is inserted through one auxiliary arm 3d, and the lighting control line 6c is inserted through the other auxiliary arm 3d.

According to the fourth aspect of the present invention, the third aspect is provided.
The desk stand described above is characterized in that the two auxiliary arms 3d are housed in an outer cylinder 3e that substantially covers the outer peripheries thereof.

According to a fifth aspect of the present invention, in the desk stand according to one of the first to fourth aspects, all of the lighting devices 5 are provided in at least two specifications having different input voltages. The pattern 5d of the substrate 5c is formed so that the components can be mounted, the number of components to be mounted is increased or decreased depending on the difference in the input voltage, and the switching unit 5e which can selectively switch and connect between the predetermined patterns 5d is provided. It is characterized by being able to handle differences.

According to the sixth aspect of the present invention, the fifth aspect
In the desk stand described above, the lighting device 5 includes a DC power supply unit 5a that is connected to the AC power supply AC to convert AC into DC, and an inverter unit 5b that converts DC from the DC power supply unit 5a into high frequency. In addition to the configuration, the switching unit 5e is provided in the DC power supply unit 5a.

According to the invention of claim 7, claim 6 is provided.
In the desk stand described above, the switching unit 5e is also provided in the feedback winding circuit unit 10 that drives the switching element 5f in the inverter unit 5b, or the inductor 11 for inverter resonance. .

According to an eighth aspect of the invention, in the desk stand according to the sixth or seventh aspect, a jumper for selectively connecting the switching portion 5e between a plurality of predetermined patterns 5d of the substrate 5c. In addition to the line JP, the pattern 5d is formed so that the distances between the predetermined patterns 5c selectively connected by the jumper line JP are equal.

[0018]

1 and 2 show a first embodiment of a desk stand according to the present invention, which is a substantially flat plate-shaped base 1 and an upper surface thereof. A pillar 2 having a space therein, a long arm 3 rotatably provided at the upper end thereof, a lamp body portion 4 having a socket 8 for mounting a discharge lamp 7, and lighting of the discharge lamp 7. It is configured to include the device 5 and the switch 6.

The base 1 has a weight that stabilizes the desk stand and is formed in a thin plate shape, and a substantially cylindrical support 2 is erected on the upper surface on the back side thereof.
Further, an arm 3 which is electromagnetically shielded and is composed of, for example, two substantially cylindrical auxiliary arms 3d, which are electromagnetically shielded, is provided at the upper end of the support column 2 so as to be rotatable around the lower end thereof. At the upper end of the arm 3, a lamp body portion 4 for housing the discharge lamp 1 is rotatably provided at one end thereof.
The lamp body 4 has a socket 8 for mounting the discharge lamp 7 at one end, and a shade 4a arranged so as to cover the discharge lamp 7 mounted in the socket 8 from above. It is configured.

The lighting device 5 is connected to an AC power supply AC and converts the alternating current into a direct current power supply portion 5a, and the direct current power supply portion 5
It is configured to include an inverter section 5b for converting the direct current of a into a high frequency, and is housed on the side of the base 1 which is the base side of the column 2. The output side is connected to the socket 8 housed in the lamp body section 4 by a lamp wire 8a that passes through one auxiliary arm 3d. In addition, the switch 6 is provided on the front side of the lamp body 2 at the tip of the shade 4a, and the lighting control line 6c wired to the tip of the lamp body 4 through the other auxiliary arm 3d. The power of the desk stand can be turned on and off by operating the switch 6.

With the above construction, in the desk stand according to the present embodiment, the switch 6 is provided at the front end of the lamp body section 4 which is the most front side,
It becomes possible to operate the switch 6 near the hand, and the switch 6 can be easily operated. In addition, the lamp line 8a and the lighting control line 6
Since c and c are separately housed in the electromagnetically shielded auxiliary arm 3d made of a conductive member, noise from the lamp line 8a is less likely to affect the lighting control line 6c and malfunction can be prevented. , Lamp line 8
The noise emitted from a to the outside can be reduced.

FIGS. 3 and 4 show a second embodiment of the desk stand of the present invention. The difference from the first embodiment is that the arm composed of two auxiliary arms 3d. 3, a substantially cylindrical outer cylinder 3e that substantially covers the outer circumference of the outer cylinders 3e.
The third embodiment is the same as that of the first embodiment except the above.

Even with this construction, the same effect as that of the first embodiment is obtained, and the two auxiliary arms 3d supporting the lamp unit 4 are covered by the single outer cylinder 3e. , You can improve the appearance of the desk stand.

FIGS. 5 and 6 show a desk stand according to a third embodiment of the present invention. The difference from the first embodiment is that the lighting device 5 is applied to different input voltages. It is configured so that it can be easily dealt with, and is otherwise configured similarly to the first embodiment.

The lighting device 5 has a specification with different input voltages, for example, 100V system and 2V, such as 100V and 200V.
The pattern 5d of the substrate 5c is formed so that at least two components of 00V system can be mounted, the number of components mounted on the substrate 5c is increased or decreased depending on the difference in the input voltage, and the space between the predetermined patterns 5d in the DC power supply unit 5a is increased. Switching unit 5e
The jumper lines JP are selectively switched and connected to cope with the difference in input voltage.

That is, although all the components shown in FIG. 5 can be mounted on the board 5c, some of the components of the DC power supply 5a constituting the rectifying circuit are increased or decreased according to the input voltage specifications. At the same time, different input voltages can be handled by switching the switching unit 5e provided in the DC power supply unit 5a. When the input voltage is 100 V, for example, the diodes D3 and D shown by the broken lines as shown in FIG.
4 is not mounted, and the jumper wire JP is the switching unit 5e.
Is connected to the P1 side shown by the solid line and is not provided on the P2 side shown by the broken line, thereby forming a so-called voltage doubler rectifier circuit. Further, when the input voltage is, for example, 200 V, the aluminum electric field capacitor C2 shown by the broken line is not mounted as shown in FIG. 6, and the jumper wire JP which is the switching unit 5e is connected to the P2 side shown by the solid line. , P1 side shown by the broken line is not connected. In addition,
At this time, the distance (pitch) between the patterns 5d on the P1 side and the P2 side to which the jumper wire JP is connected is made equal. 5 and 6, the discharge lamp connected to the output side of the inverter unit 5b connected to the DC power supply unit 5a is omitted.

With the above-described structure, in the desk stand according to the present embodiment, in addition to the effects of the first embodiment, the number of mounted parts is increased / decreased and the switching section 5e is added.
By switching connection of the jumper wire JP, it is possible to use the same substrate 5c between different input voltages, and it is possible to share manufacturing dies, manufacturing equipment, or mounted parts, and to reduce costs. Further, since the connecting portion of the jumper wire JP, which is the switching unit 5e, has the same length, the switching using the automatic mounting machine can be easily performed.

FIGS. 7 and 8 show a fourth embodiment of the desk stand of the present invention. The difference from the third embodiment is that it is for inverter resonance in the inverter section 5b. The inductor 11 and the feedback winding circuit section 10 for driving the switching element are also provided with the switching section 5e so that the input voltage can be adapted to 230V, for example. The configuration is the same as that of the above.

That is, in the inverter section 5b, the inductor 11 for inverter resonance has an input voltage of 100 V or 200 V on the end side of the winding as shown in FIG.
The taps 11a are provided with the number of turns required in 1., for example, the input voltage is 230V, and the DC power supply unit 5a is switched to the 200V side as shown in FIG. 6 to be the DC power supply unit 5a for the input voltage of 200V. In this case, the inductor 11 is provided with the tap 11b so that the input voltage can be adjusted to 230V by adjusting the output in the inverter unit 5b.
The taps 11a and 11b are selectively connected by a jumper line JP, which is a switching unit 5e, so as to cope with a difference in input voltage. Similarly, the feedback winding circuit unit 10 that drives the switching element 5f in the inverter unit 5b is also provided with taps 10b and 10c that can be selected according to the difference in the input voltage, and the switching unit 5e.
It is designed to be switched by. In FIG. 8, 10b indicates a tap having the required number of turns at an input voltage of 100V or 200V, and 10c indicates a tap having a higher number of turns, for example, an input voltage of 230V.

With this configuration, the desk stand according to the present embodiment has the same effect as that of the third embodiment and can easily cope with a different input voltage.

[0031]

As described above, according to the invention as set forth in claim 1, the switch is provided in the lamp unit so that the switch can be operated close to the operator's hand. It becomes easy to peel off.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effects of the invention described, since the switch is provided at the front end of the front side of the lamp unit, which is the most front side, the switch can be operated closer to the hand,
It is easier to operate the switch.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the lamp line and the lighting control line are electromagnetically shielded auxiliary members made of a conductive member. Since it is housed separately in the arm,
It is possible to prevent noise from the lamp line from affecting the lighting control line so that a malfunction does not easily occur, and it is possible to reduce noise emitted from the lamp line to the outside.

According to the fourth aspect of the present invention, the third aspect is provided.
In addition to the effects of the invention described above, the two auxiliary arms that support the lamp body portion are covered by the single outer cylinder, and the appearance of the desk stand can be improved.

According to the inventions of claims 5 to 7, in addition to the effect of the invention of one of claims 1 to 4, the number of mounted parts is increased or decreased and the switching portion is changed. By switching, it is possible to cope with different input voltages using the same substrate, and it is possible to share manufacturing dies, manufacturing equipment, or mounted components, thereby reducing costs.

According to the invention of claim 8, in addition to the effect of the invention of claim 6 or claim 7, since the connecting portion by the jumper wire as the switching portion has the same length,
Switching can be easily done using an automatic mounting machine.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of a desk stand of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a perspective view showing a second embodiment of the desk stand of the present invention.

FIG. 4 is a perspective view of a main part of the above.

FIG. 5 is a circuit diagram of a main part of a lighting device showing a third embodiment of a desk stand of the present invention.

FIG. 6 is a circuit diagram when the input voltage is the same as above.

7A and 7B show an inductor used in a lighting device, which is an essential part of a fourth embodiment of a desk stand of the present invention, in which (a) is a circuit diagram, (b) is a plan view, and (c). FIG. 4 is a schematic diagram illustrating a mounting state on a board.

FIG. 8 shows a feedback winding that drives a switching element used in the above lighting device, in which (a) is a circuit diagram and (b) is a circuit diagram.
FIG. 4A is a plan view, and FIG. 6C is a schematic diagram illustrating a mounting state on a substrate.

FIG. 9 is a perspective view showing a conventional desk stand (first conventional example).

FIG. 10 is a circuit diagram of a main part of the above lighting device.

FIG. 11 is a circuit diagram when the input voltage is the same as the above.

FIG. 12 is a side view showing the usage state of the above.

FIG. 13 is another conventional desk stand (second conventional example).
It is a perspective view of the partially broken state.

[Explanation of symbols]

 3 Arm 3d Auxiliary arm 3e Outer cylinder 4 Lamp part 5 Lighting device 5a DC power supply part 5b Inverter part 5c Substrate 5d Pattern 5e Switching part 5f Switching element 6 Switch 6c Lighting control line 7 Discharge lamp 8 Socket 8a Lamp line 10 Feedback winding Circuit part 11 Inductor AC AC power supply JP jumper wire

Claims (8)

[Claims] 1. A lamp unit having a socket to which a discharge lamp is mounted, an arm supporting the lamp unit, and a lamp wire passing through the arm, which is connected to the socket and high-frequency lights the discharge lamp. In a desk stand comprising a lighting device for making the discharge lamp blink and a switch for providing the switch in the lamp body part, a lighting control line provided between the lighting device and the switch, A desk stand characterized by being arranged separately from the lamp wire. 2. The desk stand according to claim 1, wherein the switch is provided at a front end of the lighting unit. 3. The arm comprises two electromagnetically shielded auxiliary arms arranged substantially parallel to each other, wherein one of the auxiliary arms has the lamp wire inserted therethrough, and the other auxiliary arm has the above-mentioned lamp wires inserted therein. The desk stand according to claim 1 or 2, wherein a lighting control line is inserted. 4. The desk stand according to claim 3, wherein the two auxiliary arms are housed in an outer cylinder that substantially covers the outer peripheries thereof. 5. The lighting device is formed with a board pattern so that all the components in at least two specifications having different input voltages can be mounted, and the number of components to be mounted is increased or decreased depending on the difference in the input voltage, and a predetermined pattern is also mounted. The desk stand according to one of claims 1 to 4, characterized in that a switching section capable of selectively switching connection between the two is provided to cope with a difference in input voltage. 6. The lighting device is configured to include a direct current power source part connected to the alternating current power source to convert alternating current to direct current, and an inverter part for converting direct current of the direct current power source part to high frequency, and the switching. The desk stand according to claim 5, wherein a part is provided in the DC power supply part. 7. The desk stand according to claim 6, wherein the switching unit is also provided in a feedback winding circuit unit that drives a switching element in the inverter unit, or an inductor for inverter resonance. 8. The switching unit is a jumper wire that selectively connects a plurality of predetermined patterns on a substrate, and patterns are formed so that the distances between the predetermined patterns that are selectively connected by the jumper wires are equal. The desk stand according to claim 6, wherein the desk stand is formed.