JPH05217494A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To make a small fluorescent lamp fitting device by dispensing with the bases of a fluorescent lamp and shortening the total length thereof. CONSTITUTION:Two lead wires 13 extracted from both end portions of a straight type bulb 12 and external lead wires 14 are respectively connected mutually by crimp sleeves 15. One portion of the end face of a protective cap 16, which has a diameter close to the outer diameter of the bulb 12 and has a notch portion in a portion in a peripheral direction of an opening portion end face, is brought into contact with the end face of the bulb 12. The external lead wires 14 are extracted from the notch portion, and the end portion of the bulb 12, the protective cap 16, and one portion of the external lead wires 14 are covered by heat contracting tube 17, so that the bulb 12 and the protective cap 16 are unified firmly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp used in copying machines, facsimiles and the like.

[0002]

2. Description of the Related Art A conventional fluorescent lamp 1 is, as shown in FIG.
A base 4 is fixed to an end of a straight pipe type valve 3 from which two lead wires 2 are respectively drawn out from both ends by an adhesive 5 such as cement, and the lead wire 2 is attached to a pin 6 planted in the base 4. Was inserted, and the pin 6 and the lead wire 2 were connected by soldering or pressure bonding (not shown). Then, as shown in FIG. 6, the fluorescent lamp 1 is fitted with a pin 6 into a socket 7 having a receiving member 9 to which external lead wires 8 are respectively connected, and the fluorescent lamp 1 is rotated to receive the pin 6 and the receiving member. The fluorescent lamp 1 is held and connected by the socket 7 when it comes into contact with the fluorescent lamp 1.

[0003]

However, in such a conventional fluorescent lamp 1, since the pins 6 project at both ends and the sockets 7 are attached to the pins 6, the original length of the bulb 3 is reduced. In comparison, the total length of the fluorescent lamp 1 becomes long. Further, in order to pivotally mount the fluorescent lamp 1 in the socket 7, the base 4 is required to have sufficient adhesive strength to withstand the turning power. However, for example, in the case of a thin valve 3 used in a copying machine or the like, it is difficult to obtain the adhesive strength, and therefore, the base 4 needs to have a large contact portion with the valve 3, and as a result, the shape of the base 4 is large. Will have to grow. Therefore, when a fluorescent lamp having a large base 4 is attached to an external device such as a facsimile, the external device becomes large, and the conventional fluorescent lamp 1 cannot be used to downsize the device. There was a problem that it was difficult.

The present invention has been made in order to solve such a problem, and provides a fluorescent lamp capable of realizing the downsizing of a fluorescent lamp-equipped device.

[0005]

In the fluorescent lamp of the present invention, the lead wire of a straight tube type bulb having two lead wires drawn out from both ends and one end side of an external lead wire are connected together. A protective cap is provided at both ends of the valve so as to cover a connecting portion between the lead wire and the external lead wire, and further, an end portion of the valve, a region from an opening of the protective cap to a corner and the external lead. A part of the wire is covered with a shrinkable tube, the valve and the protective cap are integrated with the shrinkable tube, and the other end side of the external lead wire is pulled out from the shrinkable tube to the outside. ..

[0006]

With this structure, the cap can be eliminated and the total length of the fluorescent lamp can be shortened, so that the external device to which the fluorescent lamp is mounted can be miniaturized. Furthermore, the valve and the protective cap can be firmly integrated without using an adhesive.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway enlarged front view of an end portion of a fluorescent lamp according to an embodiment of the present invention.

As shown in FIG. 1, in a fluorescent lamp 10 of the embodiment of the present invention, two lead wires 13 are drawn out from both ends of a straight tube type bulb 12, respectively, and each lead wire 13 and an external lead. The wire 14 is connected by crimping the crimp sleeve 15 (note that only one end side of the valve is shown in FIG. 1). Note that this connection can of course be made by soldering or the like. Further, at both ends of the valve 12, there are provided cylindrical protective caps 16 having a diameter close to the outer diameter of the valve 12 and having notches formed in a part of the end face of the opening in the circumferential direction. .. That is, a part of the end surface of the opening of the protective cap 16 is in contact with both end surfaces of the valve 12. Then, as shown in FIG. 2, the other end portions of the external lead wires 14 connected to the lead wires 13 are drawn out from the cutout portions. The connection portion between the lead wire 13 and the external lead wire 14 and the exhaust tip 11 are covered with a protective cap 16. In addition, the end of the valve 12,
The area from the opening to the corner of the protective cap 16 and a part of the external lead wire 14 are covered with the vinyl chloride heat-shrinkable tube 17, whereby the valve 12 and the protective cap 16 are integrated.

As described above, the fluorescent lamp 10 of the embodiment of the present invention
Unlike the conventional fluorescent lamp 1, since the lead wire 13 of the bulb 12 and the external lead wire 14 are connected without passing through the socket 7, there is no need for a cap, and therefore sockets are provided on both sides of the fluorescent lamp 10. Since there is no need, the total length can be shortened by 16 mm as compared with the conventional fluorescent lamp 1 shown in FIG. 5, and the total length can be shortened by 20 mm as compared with when the conventional fluorescent lamp 1 is mounted in the socket. Then, as shown in FIG. 1, a part of the opening end surface of the protective cap 16 having a diameter substantially equal to the outer diameter of the valve 12 is brought into contact with the end surface of the valve 12 to protect the exhaust tip 11 of the valve 12 and heat. The shrinkable tube 17 tightly integrates the protective cap 16 and the valve 12. Further, when the fluorescent lamp 11 is mounted on the external device, the fluorescent lamp 11 can be mounted on the socket 18 of the external device by a simple fitting rather than the rotary mounting as shown in FIGS. Further, in the present embodiment, the base,
Since no adhesive is used, the assembly is simple and the cost can be reduced as compared with the conventional one.

Further, conventionally, when electrically connecting the lead wire 2 and the external lead wire 8, as shown in FIG. 6, the lead wire 2 and the pin 6 are crimped, the pin 6 and the receiving metal 9 are connected,
Although there were several connecting portions such as the connection between the receiving metal 9 and the external lead wire 8 by soldering, and there were many causes of connection failure, the fluorescent lamp 10 of the embodiment of the present invention has the lead wire 13 The electrical connection between the lead wire 13 and the external lead wire 14 is only one connection portion between the lead wire 13 and the external lead wire 14 by the crimp sleeve 15, so that the quality and reliability are improved.

[0012]

As described above, according to the present invention, the cap can be eliminated and the total length of the fluorescent lamp can be shortened. Therefore, it is possible to realize the miniaturization of the external device in which the fluorescent lamp is mounted. Further, the valve and the protective cap can be firmly integrated by using the shrinkable tube without using an adhesive. Furthermore, since the assembly is simple, the cost can be reduced, and the electrical connection between the lead wire and the external lead wire is made without using a socket, so that the connection point between the lead wire and the external lead wire can be reduced to the conventional one. Compared with less, it is more reliable. In addition, when the fluorescent lamp is attached to the external device, the fluorescent lamp can be easily attached to the socket of the external device by inserting it into the socket of the external device, not by rotating attachment.

[Brief description of drawings]

FIG. 1 is a partially cutaway enlarged front view of an end portion of a fluorescent lamp according to an embodiment of the present invention.

FIG. 2 is a partially cutaway enlarged plan view of the same.

FIG. 3 is a diagram for explaining a method of mounting a fluorescent lamp and a socket of an external device in the same manner.

FIG. 4 is a perspective view showing the same wearing state.

FIG. 5 is a partially cutaway front view of a conventional fluorescent lamp.

FIG. 6 is a partially cutaway enlarged side view showing a state in which a conventional fluorescent lamp and a socket are mounted.

[Explanation of symbols]

 10 Fluorescent lamp 12 Straight tube type bulb 13 Lead wire 14 External lead wire 16 Protective cap 17 Heat shrinkable tube

Claims (1)

[Claims] 1. A straight pipe type valve having two lead wires extending from both ends thereof and one end side of an external lead wire are connected to each other, and the lead wire is connected to both end portions of the valve. A protective cap is provided so as to cover the connecting portion with the external lead wire, and further, the end portion of the valve, the region from the opening portion to the corner portion of the protective cap and a part of the external lead wire are covered with a shrinkable tube, A fluorescent lamp, wherein the bulb and the protective cap are integrated by the shrinkable tube, and the other end side of the external lead wire is pulled out from the shrinkable tube to the outside.