JPH04112471A - Fixture for ring-shaped fluorescent lamp - Google Patents

Abstract

PURPOSE:To provide a lighting fixture for a circular fluorescent lamp of the two-point support structure, which admits easy fitting operation for the lamp, by mounting a lamp holding spring in such a way as capable of opening and shutting up and down. CONSTITUTION:To mount a fluorescent lamp 5, first the gripping part 17 of a lamp holding spring 13 is held and turned upward. Now a contacting part 19 goes beyond a bend point 21 while deforming a spring 18 backward, and comes in contact with No.2 contacting point 23 situated below the spring 18 and is detained there. Then a terminal pin 5a of the fluorescent lamp 5 is inserted in a pin socket 6. The lamp holding spring 13 is turned downwards, and a lamp holding part 16 is put in contact with the peripheral surface of the fluorescent lamp 5. At this time, the contacting part 19 at the tail of the lamp holding spring 13 again goes beyond the bend point 21 of the spring 18 and is detained below No.1 contacting point situated over, to hold resiliently the fluorescent lamp 5 from the peripheral side.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application The present invention relates to a lighting fixture for annular fluorescent lamps, and in particular to a lamp support for a lighting fixture in which a lamp socket with a holder is provided in which a lamp holder portion is provided in the lamp socket. Regarding structure.

(2) Conventional technology Conventionally, in this type of lighting equipment for ring-shaped fluorescent lamps, the ring-shaped fluorescent lamp is suspended from the bottom of the main body of the equipment, which houses the lighting circuit components such as the ballast and starter, and is surrounded by a translucent shade. Covered structures are common, and various types are used, such as those that are directly attached to the ceiling or those that are suspended by a cord.

By the way, the above-mentioned annular fluorescent lamp is usually suspended from the fixture body using a plurality of elastic lamp support springs made of bent metal plates, and a lamp terminal pin is connected to a lamp socket led out from the fixture body by a wiring cord. The common method is to supply power by inserting the lamp, and the lamp is supported at three points by elastic springs, which has the drawback of making installation difficult.

In addition, since the wiring cord is exposed on the bottom side of the device body,
It also had an appearance problem of being unsightly.

For this reason, a so-called 2-catch lamp socket with a holder is used, which is a lamp socket with a lamp holder part, which is attached to the main body of the fixture, and is supported at two points: the lamp socket and a conventional lamp support spring placed opposite the lamp socket. This method has been put into practical use (see Japanese Patent Laid-Open No. 63-20385).

FIG. 4 is a cross-sectional view of the main parts of this type of two-catch type ring-shaped fluorescent lamp lighting fixture 1. In the figure, 2 indicates a fixture body 3 that houses lighting circuit components inside the fixture body 2. A protruding lamp socket with a holder, 4 is a lamp support spring placed on the lower surface of the appliance body 2, facing the lamp socket with a holder 3, and an annular fluorescent lamp 5 is connected to the lamp socket with a holder 3 and the lamp support spring 4. It is supported at two points in the diametrical direction.

More specifically, the lamp socket with holder 3 is formed of a hollow resin molded product, and a wiring cord (not shown) is connected to the lighting circuit of the device body 2 inside, and its tip is connected to the four terminals of the annular fluorescent lamp 5. Pin socket 6 into which pin 5a is attached
is derived.

Reference numeral 7 designates a lamp holder portion extending above and below the pin socket 6 and having an arcuate cross section. Further, a lamp holding spring 8 is provided in an arcuate manner at the end of the upper holder portion. The terminal pin 5a of the lamp 5 is pressed in the pin insertion direction.

The lighting fixture 1 for an annular fluorescent lamp having such a structure can stably support an annular fluorescent lamp 5 at two points by the lamp socket 3 with a holder and the lamp support spring 4, and the wiring cord is housed in the socket 3, which improves the appearance. This problem will be solved.

(3) Problems to be Solved by the Invention However, in order to attach and detach the annular fluorescent lamp 5 in the lighting fixture 1, first, one end is held on the lamp support spring 4, and then the terminal pin 5a on the other end side is attached to the lamp socket with holder. However, since the lamp holding spring 8 blocked the front of the pin socket 6, the lamp device was extremely difficult to install.

Therefore, the present invention has been made in view of the above,
The object of the present invention is to provide a lighting fixture for an annular fluorescent lamp with a two-point support structure, which facilitates the lamp mounting operation.

(4) Means for Solving the Problems For this reason, the present invention provides an elliptical structure in which the lamp holding spring of the lamp socket with holder of the above-mentioned annular fluorescent lamp lighting device is configured to be openable and closable, and when the lamp is installed, at least from the front part of the pin socket. It is designed to allow you to leave.

More specifically, in the opening/closing structure of the lamp holding spring, the present invention has an intermediate body portion rotatably pivoted, an arcuate lamp holding portion on the front side, and a pressure spring to be described below on the rear side,
The lamp holding spring is formed with a contact portion that slides on the elastic spring, and when the lamp holding spring is rotated to open and close, the lamp holding spring is deformed in a direction away from the axis, and the lamp holding spring is rotated over a certain angle. Due to the movement, the contact point moves up and down 2
The lamp is configured with an elastic spring that changes its position and deforms and returns, divides the lamp holding spring into an open side and an open side, and biases the lamp holding spring.

(5) Operation When the lamp is attached, the front side of the lamp holding spring is rotated upward to open, so that the lamp holding spring is held in a state separated from the front side of the socket holder portion.

Further, when the lamp is rotated downward after the lamp is attached, the arc-shaped lamp holding portion on the front side of the lamp holding spring holds the lamp socket in a depressed state on the pin receptacle side.

(6) Examples Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a main part of a lighting fixture 11 for an annular fluorescent lamp according to the present invention, in which a lamp socket with a holder 12 is attached to protrude from the lower surface of a fixture main body 2, as in the conventional case.

This holder-equipped lamp socket 12 is for two lamps and is the same as the conventional one except that the lamp holding spring 13 can be opened and closed freely, and the same functional parts are given the same reference numbers and their explanations will be omitted.

FIG. 2 is an exploded perspective view showing the main part of the opening/closing operation of the lamp holding spring 13, which is a feature of the present invention. A shaft hole 15.15 is formed in which the core shaft 14 is pivoted.

An arcuate lamp holder 16 is formed on the front side of the shaft hole 15, and the end thereof is folded back in the opposite direction to form a grip 17 for opening and closing operations.

Further, the rear surface side of the shaft hole 15 is curved with a gentle slope, and the end thereof is folded back to form an elastic spring 18, which will be described later.
A contact portion 19 is formed that makes sliding contact with.

As shown in cross section in FIG. 1, when the fluorescent lamp 5 is mounted, the lamp holding spring 13 has an arc-shaped lamp holding part 16 that extends through the lamp holder part 7 to hold the fluorescent lamp 5 in the pin socket 6 of the socket. It is rotatably pivoted and fixed near the lamp holder part 7 by a core shaft 14 so as to be pressed and held from the facing side.

On the back side of the lamp holding spring 13, a resilient spring 18 whose operating surface is in contact with its contact portion 19 is supported by being loosely fitted into a pair of spring receiving grooves 20 oriented parallel to the core axis 14.

This compression spring 18 is made of a flat spring steel plate.

As shown in the figure, the central portion is bent W1 toward the core #114, and when the lamp holding spring 13 is rotated upward and downward around the core axis 14, the sliding contact portion 19 touches this bending point 21. Each time it crosses, it deforms and returns to the left and right.

Next, a description will be given of an operation for mounting the fluorescent lamp 5 in the annular fluorescent lamp lighting fixture 11 having the lamp socket with holder 12 having such a structure.

FIG. 3 is a diagram showing the operation of the lamp holding spring 13 when a fluorescent lamp is attached, firstly when the fluorescent lamp 5 is not attached.

The rear sliding contact portion 19 of the lamp holding spring 13 is an elastic spring 18
The front side of the lamp holding spring 13 is positioned below the front surface of the socket pin receptacle 6 as shown by the solid line in the figure.

Next, in order to mount the fluorescent lamp 5, first hold the grip portion 17 of the lamp holding spring 13 and rotate it upward as shown by the arrow.

Then, the abutting part 19 deforms the elastic spring 18 backward, passes the bending point 21, and comes into contact with the second abutting point 23 below the elastic spring 18 and is locked. is pressed forward at a position below the core shaft 14, so that the front side of the lamp holding spring 13 is held upward and retracted from the front side of the socket pin receptacle 6.

Then, the terminal pin 5a of the fluorescent lamp 5 is inserted into the pin socket 6.

After that, as shown by the dotted arrow, the lamp retaining spring 13 is rotated downward to bring the lamp holder 16 into contact with the circumferential surface of the fluorescent lamp 5.

At this time, the contact portion 19 at the rear end of the lamp holding spring 13 crosses the bending point 21 of the elastic spring 18 again and is locked on the lower side of the upper first contact point 22, causing the fluorescent lamp 5 to move toward the outer circumferential side. Holds more elastic.

In the above-described embodiment, the elastic spring 18 was bent at its center toward the core shaft 14, but it is not necessary to do so. As long as it abuts at two positions, it can have any suitable shape, such as a straight shape.

(7) Effects of the Invention As described above, the present invention provides a lighting device for an annular fluorescent lamp having a lamp socket with a holder, in which the lamp holding spring is attached so as to be able to be opened and closed vertically, so that the lamp can be mounted very easily.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a lamp support structure of a lighting fixture for an annular fluorescent lamp according to the present invention, and FIGS. 2 and 3 are exploded perspective views of an opening/closing mechanism for a lamp holding spring shown in FIG. 1, and the same lamp holding spring. FIG. 4 is a sectional view of a lamp support structure of a conventional lighting fixture for an annular fluorescent lamp. 2... Fixture body, 5-- Annular fluorescent lamp, 11... Lighting fixture for annular fluorescent lamp, 12... Lamp socket with holder, 13... Lamp holding spring, 14... Core shaft ( shaft), 16... Lamp holding part, 18... Elastic spring, 19... Contact part.

Claims (1)

[Claims] (1) In a lighting device in which a lamp socket with a holder is attached to the lower surface of the device body and a lamp holding spring holds an annular fluorescent lamp, the lamp holding spring has an intermediate portion pivoted so as to be rotatable, and a lamp holding spring that is attached to the front side. An arc-shaped lamp holding part and a contact part slidingly contacting the elastic spring are formed on the rear side, and the elastic spring is disposed so as to be deformable back and forth with respect to the shaft, and the lamp holding spring is rotated by a predetermined angle or more. A lighting fixture for an annular fluorescent lamp, characterized in that the contact point is changed to two positions, upper and lower, and the lamp holding spring is biased separately into an opening side and a closing side.