JP2588021Y2 - Electronic discharge lamp lighting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic discharge lamp lighting device in which electronic components are mounted on a printed circuit board, and more particularly to an electronic discharge lamp lighting device having a structure suitable for being incorporated in a tubular lighting device such as a downlight. The present invention relates to a discharge lamp lighting device.

[0002]

2. Description of the Related Art There is no conventional electronic discharge lamp lighting device of this kind which is close to the conventional one. However, if it is to be noted, choke coils b and c are provided on a substantially octagonal printed circuit board a as shown in FIGS. , D, power transistor e, rectifier f
There is an inverter lighting device for a fluorescent lamp on which the above-mentioned is mounted. Here, h is a lamp holder having a socket j for connecting a round fluorescent lamp i, and is connected to a lighting device by a connector k.

[0003]

When the above-mentioned lighting device is built in a tubular device such as a downlight as shown in FIG.
Since the connector k is located at the end of the printed circuit board a, there is a problem that the lamp diameter of the round fluorescent lamp is larger than that of the printed circuit board a, and the cylindrical diameter of the cylindrical device is increased. There is a method of using a compact lamp m as shown in FIG. 8A to make the cylindrical diameter of the cylindrical device equal to the outer shape of the printed circuit board a. In this case, a lamp socket as shown in FIG. n is fixed to the cylindrical device, and a space is required for connecting the lamp socket n to the printed circuit board a, and the cylindrical device becomes longer in the axial direction. Since the heat-generating components such as the coils c and d are located near the center, there is a problem that heat is trapped and the temperature rises.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to reduce the cross-sectional area and the length in the axial direction of a cylindrical device, and to suppress a rise in temperature. An electronic discharge lamp lighting device is provided.

[0005]

In order to achieve the above-mentioned object, an electronic discharge lamp lighting device according to the present invention is provided with an electronic component mounted on a printed circuit board 1 and a metal having a side surface 2a rising along the outer periphery of the printed circuit board 1. In the electronic discharge lamp lighting device built in the cylindrical device 2 made of a plastic, the heat-generating components constituting the main circuit of the inverter, such as the choke coils 3, 4, 5, the power transistor 6, and the rectifier 7, are printed on the printed circuit board. 1 is provided at the center of the printed circuit board 1 with a terminal 9 which can be directly connected to a single-cap lamp socket 8 arranged at the center of the cylindrical device 2 and arranged at the outer peripheral portion of the tubular device 2.

[0006]

According to the above construction, the heat-generating components constituting the main circuit of the inverter, such as the choke coils 3, 4, 5, the power transistor 6, and the rectifier 7, among the electronic components are arranged on the outer peripheral portion of the printed circuit board 1. In addition, the heat of the heat-generating component can be smoothly released by the metal tubular device 2.
Also, by providing a terminal 9 at the center of the printed circuit board 1 to which the one-base lamp socket 8 arranged at the center position of the tubular device 2 can be directly connected, the one-base lamp socket 8 is directly connected to the center of the printed circuit board 1. The lamp 10 such as a compact lamp is mounted on the center of the printed circuit board 1 to reduce the cross-sectional area of the tubular device 2 and the single base lamp socket 8 is directly connected to the printed circuit board 1 to form a cylindrical shape. The length of the device 2 in the cylinder axis direction can be reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a printed circuit board 1 is formed in a polygonal shape that is almost circular. On the printed circuit board 1, choke coils 3, 4, 5, a power transistor 6 for oscillation, a rectifier 7, a noise prevention filter 1
Electronic components such as 1 are mounted. Terminal pins 9a are integrally mounted as terminals 9 in the center of the printed circuit board 1.
The one-base lamp socket 8 is arranged on the printed circuit board 1 so that the one-base lamp socket 8 can be directly connected to the terminal pin 9a. As for the arrangement of the electronic components on the printed circuit board 1, the choke coils 3, 4, and 5, the power transistor 6, the rectifier 7, and the noise prevention filter 11, which constitute the main circuit of the inverter, are components having large shapes and large heat generation. Yes, it is arranged on the outer periphery of the printed circuit board 1. In the vicinity of the center of the printed circuit board 1, a terminal pin 9a as a terminal 9 and a one-sided lamp socket 8 are arranged. A mounting hole 12 is provided on the outer periphery of the printed circuit board 1, and the printed circuit board 1 is arranged and mounted in a metal tubular device 2 such as a downlight as shown in FIG. At this time, since the outer shape of the printed circuit board 1 is a polygon that is almost circular, the outer periphery of the printed circuit board 1 is close to the inner surface of the side surface 2a of the cylindrical device 2 as shown in FIG. The printed circuit board 1 is attached to the bottom surface 2b of the cylindrical device 2 with a fixture 13 called a locking support, and the tip of the fixture 13 inserted into the bottom surface 2b is inserted into the attachment hole 12. It is. A lamp 10 such as a compact lamp is arranged in the tubular device 2, and the lamp 10 is attached to a single-cap lamp socket 8 and electrically connected thereto.

[0008] As described above, the electronic discharge lamp lighting device is built in the tubular appliance 2. In such a device, since the outer periphery of the printed circuit board 1 is made to have an outer shape in contact with the side surface 2a of the tubular device 2 and the heat-generating components are arranged on the outer peripheral portion of the printed circuit board 1, Since the side surface 2a of the metal tubular device 2 standing up and the heat-generating component come close to each other, the radiant heat efficiently escapes to the tubular device 2 and the temperature rise of the lighting device can be suppressed.
The main components disposed on the outer periphery of the printed circuit board 1 are large and heavy components at the same time as the heat-generating components, but are close to the mounting portion of the printed circuit board 1 provided on the outer peripheral portion of the printed circuit board. Strong against cracks in the printed circuit board 1 due to shocks such as vibration or drop. Further, since the outer shape of the printed circuit board 1 and the cross section of the cylindrical device 2 are substantially equal, the cylindrical device 2 having the minimum cross section can be formed, and light distribution control can be easily performed. Further, the socket 8 for the one-sided lamp is connected to the terminal pins 9 of the printed circuit board 1.
Since it is directly connected to a, it is possible to minimize the length of the cylindrical device 2 in the direction of the cylindrical axis, and to produce a small-sized cylindrical device 2 in combination with the effect that the cross-sectional area can be reduced.

When directly connecting the one-sided lamp socket 8 to the terminal pin 9a, the one-sided lamp socket 8 is pushed vertically to the printed circuit board 1 so that the terminal pin 9a and the one-sided lamp socket 8 can be connected. Internal terminals are quickly connected. At this time, a force of several kg is applied to the center of the printed circuit board 1. However, since the printed circuit board 1 is substantially circular, the stress generated on the printed circuit board 1 (the amount of deflection when supporting the periphery of the printed circuit board 1) is minimized. Can be suppressed. When the lamp 10 is mounted in the one-base lamp socket 8 directly connected to the printed circuit board 1 in this manner, the force as shown by the arrow A in FIG. , Printed circuit board 1 as shown by arrow B in FIG.
Is applied to the printed circuit board 1 through the one-base lamp socket 8. When the lamp 10 is removed, a force that rotates in the direction opposite to the arrow B is applied to the printed circuit board 1 while pressing the printed circuit board 1 in the same manner. Even with respect to this rotational force, since the distance between the supporting portion of the printed circuit board 1 provided around the printed circuit board 1 and the center of the printed circuit board 1 is minimum, the force received by the supporting portion can be minimized. That is, the stress applied to the printed circuit board 1 from the single-cap lamp socket 8 when the single-cap lamp socket 8 or the lamp 10 is mounted, or when the lamp 10 is replaced, or when the lamp 10 is printed via the single-cap lamp socket 8. Since the stress applied to the substrate 1 is almost the same distance from the position of the lamp 10 to any part of the periphery of the printed circuit board 1, the moment is almost the same and can be minimized. Become. In addition, before and after the mounting of the lamp 10 or when the lamp 10 is replaced, a force in the left and right rotation direction about the one-sided lamp socket 8 can be applied to the lamp 10 as shown by arrows in FIGS. There is also. Also in this case, since the printed circuit board 1 is substantially circular, the stress applied to the printed circuit board 1 is minimized because the distance from the center of the printed circuit board 1 to any part of the peripheral portion of the printed circuit board 1 is minimum. ing.

Further, since the lamp 10 is located at the center position, the heat of the lamp 10 is evenly distributed and does not concentrate on a part. Moreover, the weight balance is good and the instrument design is easy. Further, since the outer shell of the one-base lamp socket 8 disposed at the center of the printed circuit board 1 is made of resin, the electronic components can be thermally isolated from each other, and the temperature rise can be easily designed. In the above embodiment, the printed circuit board 1 is made substantially circular, and the printed circuit board 1 is attached to the cylindrical tubular device 2. However, the printed circuit board 1 is made substantially square, and the rectangular tubular device 2 is formed. May be attached to the device, or may have other shapes.

[0011]

According to the present invention, as described above, the heat-generating components constituting the main circuit of the inverter, such as the choke coil, the power transistor, and the rectifier, among the electronic components are arranged on the outer peripheral portion of the printed circuit board. The heat-generating component comes close to the side of the cylindrical device, the radiant heat can efficiently escape to the cylindrical device, and the temperature rise of the lighting device can be suppressed. Because it is close to the mounting part of the peripheral to the cylindrical device, it is also resistant to cracks on the printed circuit board such as vibration during transportation of the device and impact when dropped, and furthermore, a single base located at the center position of the cylindrical device Since the terminal to which the lamp socket can be directly connected is provided at the center of the printed circuit board, the cross-sectional area of the cylindrical device can be minimized, and the length of the cylindrical device in the direction of the cylindrical axis is minimized, thereby achieving miniaturization. One in which it is bet.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention from which a socket for a one-base lamp has been removed.

FIG. 2 is a perspective view showing a state where the one-base lamp socket is mounted.

FIG. 3 is a perspective view showing a state where the electronic device is incorporated in the cylindrical device.

FIG. 4 is a cross-sectional view of the state of FIG. 3 as viewed from below.

FIG. 5 is a view for explaining attachment and detachment of the lamp according to the embodiment;
(A) is a perspective view, (b) is a sectional view.

FIG. 6 is a partially exploded perspective view of a conventional example.

FIG. 7 is a front view for explaining mounting of a conventional lamp.

FIG. 8A is a front view showing a compact lamp,
(B) is a perspective view of the lamp socket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Cylindrical apparatus 2a Side surface 3 Choke coil 4 Choke coil 5 Choke coil 6 Power transistor 7 Rectifier 8 Socket for single base lamp

Continued on the front page (56) References JP-A 5-81905 (JP, U) JP-A 63-125304 (JP, U) JP-A 63-72878 (JP, U) (58) Fields surveyed (Int .Cl. ⁶ , DB name) H05B 41/02 F21V 23/00

Claims (1)

(57) [Scope of request for utility model registration] 1. An electronic discharge lamp lighting device in which electronic components are mounted on a printed circuit board and which is built in a metal cylindrical device having a side surface rising along the outer periphery of the printed circuit board.
Of the above electronic components, heat-generating components constituting a main circuit of an inverter, such as a choke coil, a power transistor, and a rectifier, are arranged on an outer peripheral portion of a printed circuit board, and a socket for a single-base lamp arranged at a center position of a cylindrical device is directly connected. An electronic discharge lamp lighting device, characterized in that a terminal to be obtained is provided at the center of a printed circuit board.