JP2005347049A - Connection structure of cold-cathode tube terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of a cold-cathode tube terminal, capable of materializing a stable connected state, and simply canceling the connection without spoiling its quality when desired. <P>SOLUTION: The tip part of the needlelike cold-cathode terminal 2 projecting from the end face of a cold-cathode tube 1 is bent in a hook shape to form a hooked part 2a. A ringed part 3a is formed at the tip part of an electric supply line 3. The hooked part 2a of the cold-cathode terminal 2 is hooked on the ringed part 3a of the electric supply line, and is joined by soldering. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a connection structure between a cold cathode tube terminal of a cold cathode tube and a power supply line connected to a power supply source.

In a liquid crystal display device used as a display screen of a liquid crystal television, personal computer, mobile phone or the like, a cold cathode tube is generally mounted as an illumination light source for a liquid crystal panel, for example, a backlight light source. The cold-cathode tube is, for example, an elongated tubular tube filled with argon gas and an appropriate amount of mercury. The inner wall is coated with a phosphor, and cold-cathode tube terminals connected to internal electrodes are provided on both end faces. Each is provided. Each cold cathode tube terminal is electrically connected to a power supply line connected to a power supply source. Then, when a high voltage is applied from the power supply source to the electrode in the cold cathode tube through the power supply line and the cold cathode tube terminal, discharge occurs in the cold cathode tube, and ultraviolet rays are emitted,
As a result, the phosphor is excited to emit visible light for illuminating the liquid crystal panel.

Here, a specific connection structure between a conventional cold cathode tube terminal and a feeder line (for example, Patent Documents 1 and 2).
Will be described with reference to FIG. As shown in FIG. 2A, a cold cathode tube 101 as a material has a needle-like cold cathode tube terminal 102 protruding from an end face. On the other hand, the feed wire 103 as a material is a twisted wire covered with an insulator, and its tip portion is exposed to form a ring-shaped portion 103a (see Patent Document 1). Further, for example, a rubber tubular member 104 having appropriate elasticity and insulation is inserted into the power supply line 103.

Subsequently, the cold cathode tube terminal 102 and the feeder line 103 are connected. First, as shown in FIG. 2B, the tip of the cold cathode tube terminal 102 is connected to the ring shape of the feeder line 103. Part 1
Insert into 03a. Next, as shown in FIG. 2C, the tip portion of the cold cathode tube terminal 102 and the ring-shaped portion 103 a are soldered, and thereby both are joined by the solder 105.

In place of such a configuration, at the material stage, for the cold cathode tube 101, a cold cathode tube terminal 102 whose tip is bent into a ring shape is prepared, and the other feeder 103 is The tip portion is simply exposed, that is, the ring-shaped portion 103
In some cases, a member not having a is prepared, and at the connection stage between the two, the tip portion of the power supply line 103 is entangled with the ring-shaped portion at the tip of the cold cathode tube terminal 102, and then both are joined by soldering ( Patent Document 2).

Thereafter, as shown in FIG. 2D, the cylindrical member 104 is moved along the feeder line 103 to the cold cathode tube 1.
The cold cathode tube terminal 102 and the ring-shaped portion 103a joined by soldering are accommodated in the cylindrical member 104. The cold cathode tubes 1 connected in this way
01 is supported by the cylindrical member 104 with respect to the main body of the liquid crystal display device. Therefore, even if inadvertent vibrations occur in the main body of the liquid crystal display device during use of the liquid crystal display device, the vibration can be absorbed by the cylindrical member 104, and thus the cold cathode tube 101 vibrates excessively. Not,
A high-quality liquid crystal display can be obtained.

The cylindrical member 104 essentially serves to protect the solder joint connection portion, and instead of the cylindrical member 104, the solder joint connection portion is covered with a resin cap (Patent Literature). 1) and may be sealed with a heat-shrinkable tube (see Patent Document 2). However, this case is disadvantageous in that a separate prevention measure against vibration propagation to the cold cathode tube 101 mounted on the liquid crystal display device is required.
JP 2002-124308 A JP-A-9-237642

However, in the conventional cold cathode tube terminal connection structure described above, since the tip portion of the cold cathode tube terminal 102 is simply inserted into the annular portion 103a of the feeder line 103 in the solder joint connection portion, Due to an inadvertent load, the tip portion of the cold cathode tube terminal 102 is connected to the feeder line 103.
There is a concern that the connection between the two may be lost due to slipping out of the ring-shaped portion 103a, and there is anxiety about the stable connection state between the two. Of course, when the tip of the power supply line 103 is entangled with the ring-shaped portion at the tip of the cold cathode tube terminal 102 and soldered as in the other method described above, the connection state between the two is surely stable. Once joined, it is extremely difficult to break the connection between them, that is, to unwind the tip of the feeder 103 while melting the solder.
This is extremely inconvenient for the replacement work and recycling work.

Therefore, the present invention has been made in view of the above problems, and a connection structure of a cold cathode tube terminal that can realize a stable connection state and can easily disconnect the connection without impairing the quality when intended. Is intended to provide.

In order to achieve the above object, the cold cathode tube terminal connection structure according to the present invention comprises a needle-like cold cathode tube terminal protruding from the end face of the cold cathode tube, and a ring-shaped portion formed at the tip of the feeder line. In the connection structure for electrical connection, the tip portion of the cold cathode tube terminal is bent in a bowl shape,
The hook-shaped portion is hooked on the ring-shaped portion and joined by soldering. As a result, in the solder joint connection portion, the hook-like portion of the tip portion of the cold-cathode tube terminal is in a state of being hooked on the ring-like portion of the power supply line. The part does not come off from the ring-shaped part of the power supply line and the connection between the two is not cut off. Moreover, when the cold cathode tube is intended to be replaced or recycled, the saddle-like portion of the cold cathode tube terminal can be removed from the ring-shaped portion of the power supply line as it is by melting the solder at the connection portion of the solder joint. .

Here, from the viewpoint of surely protecting the connection part of the solder joint, the elastically deformable and insulating cylindrical member inserted in advance in the power supply line is slid along the power supply line to be joined by soldering. It is preferable that the cold-cathode tube terminal and the ring-shaped portion thus formed are accommodated in the cylindrical member.

Furthermore, it is preferable that the cold cathode tube is mounted on a liquid crystal display device as a light source for illuminating a liquid crystal panel, and is supported by the cylindrical member with respect to the main body of the liquid crystal display device. Thereby, even if inadvertent vibration occurs in the main body of the liquid crystal display device during use of the liquid crystal display device, the vibration can be absorbed by the cylindrical member originally intended for protecting the connection portion of the solder joint, The cold cathode tube does not vibrate excessively, and a high-quality liquid crystal display can be obtained.

According to the cold cathode tube terminal connection structure of the present invention, at the solder joint connection portion, due to an inadvertent load, the hook-shaped portion of the cold cathode tube terminal comes out of the ring-shaped portion of the power supply line and the connection between the two is broken. Therefore, a stable connection state between the two can be realized. Moreover, when intended,
By melting the solder at the solder joint, it is possible to remove the saddle-shaped portion of the cold cathode tube terminal from the ring-shaped portion of the power supply line as it is, so that it can be easily disconnected without losing quality. It is effective for replacement and recycling of cold cathode fluorescent lamps.

Hereinafter, a cold cathode tube terminal connection structure according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a cold cathode tube terminal connection structure according to an embodiment of the present invention, in which the steps proceed in the order of FIGS.

As shown in FIG. 1 (a), a cold cathode tube 1 as a material has a needle-like cold cathode tube terminal 2 from the end face.
Is protruding. The cold-cathode tube terminal 2 has a hook-shaped portion 2 with its tip portion bent into a hook shape.
a is formed. Incidentally, the hook-like portion 2 can be easily formed with pliers or the like. On the other hand, the feed wire 3 as a material is a twisted wire covered with an insulator, and its tip portion is exposed to form a ring-shaped portion 3a. The shape of the ring-shaped portion 3a is maintained by applying solder in advance. In addition, a cylindrical member 4 made of, for example, rubber having appropriate elasticity and insulation is inserted into the power supply line 3.

Subsequently, such a cold cathode tube terminal 2 and the feeder 3 are connected. First, FIG.
As shown in (b), the hook-shaped portion 2 a of the cold cathode tube terminal 2 is hooked on the ring-shaped portion 3 a of the feeder 3.
Next, as shown in FIG. 1 (c), the hook-shaped part 2 a and the ring-shaped part 3 a are soldered, and thereby both are joined by the solder 5.

Thereafter, as shown in FIG. 1 (d), the cylindrical member 4 is slid toward the cold cathode tube 1 along the power supply line 3, whereby the cold cathode tube terminal 2 and the ring-shaped portion 3a joined by soldering. Are accommodated in the tubular member 4. Therefore, the connection part of the solder joint can be reliably protected by the cylindrical member 4.

The cold cathode tubes 1 connected in this way are supported by the cylindrical member 4 with respect to the main body of the liquid crystal display device. Therefore, even if inadvertent vibration occurs in the main body of the liquid crystal display device during use of the liquid crystal display device, the cold cathode tube 1 may vibrate excessively because the vibration can be absorbed by the tubular member 4. No, high quality liquid crystal display can be obtained. Since this can be realized by using the cylindrical member 4 as a protection for the connection part of the solder joint, it is advantageous in that the number of parts can be suppressed.

According to such a cold cathode tube terminal connection structure, the hook-like portion 2a at the tip portion of the cold cathode tube terminal 2 is hooked on the ring-like portion 3a of the feeder 3 at the solder joint connection portion. Therefore, the saddle-shaped portion 2a of the cold cathode tube terminal 2 does not come off from the ring-shaped portion 3a of the power supply line 3 due to an inadvertent load, and the connection between them is not cut off, and a stable connection state between the two can be realized. In addition, when the cold cathode tube 1 is intended to be replaced or recycled, the solder 5 at the connecting portion of the solder joint is melted, so that the hook-shaped portion 2a of the cold cathode tube terminal 2 is used as it is.
It can remove from the ring-shaped part 3a. That is, it can be said that the connection can be easily released without impairing the quality, which is effective for the replacement and recycling of the cold cathode tube 1.

In addition, this invention is not limited to said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention.

The present invention is useful for connection between a cold cathode tube terminal of a cold cathode tube and a power supply line connected to a power supply source.

It is sectional drawing which shows the connection structure of the cold cathode tube terminal which is one Embodiment of this invention. It is sectional drawing which shows the connection structure of the conventional cold cathode tube terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cold-cathode tube 2 Cold-cathode tube terminal 2a Cage-shaped part 3 Feed line 3a Ring-shaped part 4 Tubular member 5 Solder

Claims (4)

A needle-like cold cathode tube terminal protruding from the end face of a cold cathode tube mounted on a liquid crystal display device as a light source for illuminating the liquid crystal panel is electrically connected to a ring-shaped portion formed at the tip of the feeder line. A connection structure,
A distal end portion of the cold cathode tube terminal is inserted into the annular portion, joined by soldering, and an elastically deformable and insulating rubber cylindrical member inserted in advance into the power supply line is attached to the power supply line. The cold cathode tube terminal and the ring-shaped portion joined by soldering are accommodated in the tubular member by sliding along the cylindrical member, and the cold cathode tube is in contact with the main body of the liquid crystal display device. In the connection structure of the cold cathode tube terminal supported by
The cold cathode tube terminal has a distal end bent in a hook shape, and the hook-shaped portion is hooked on the ring-shaped portion, joined by soldering, and elastically deformable and insulatively inserted in advance into the power supply line. The cold cathode tube terminal and the ring-shaped portion, which are joined by soldering, are accommodated in the tubular member by sliding a rubber tubular member having a line along the power supply line, and the cold cathode tube Is supported by the cylindrical member with respect to the main body of the liquid crystal display device. In the connection structure for electrically connecting the needle-like cold cathode tube terminal protruding from the end face of the cold cathode tube and the ring-shaped portion formed at the tip portion of the feeder line,
A cold cathode tube terminal connection structure, wherein a tip portion of the cold cathode tube terminal is bent in a hook shape, and the hook portion is hooked on the ring-shaped portion and joined by soldering. The cold-cathode tube terminal and the ring-shaped portion joined by soldering are slid by sliding an elastically deformable and insulating cylindrical member inserted in advance into the power supply line along the power supply line. The cold cathode tube terminal connection structure according to claim 2, wherein the cold cathode tube terminal connection structure is housed in a member. The said cold cathode tube is mounted in a liquid crystal display device as a light source for illumination of a liquid crystal panel, and is supported by the said cylindrical member with respect to the main body of this liquid crystal display device. Connection structure of cold cathode tube terminals.

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