JP2003059599A - Discharging tube device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharging tube device of which, a rubber holder can be easily mounted to a cold cathode discharging tube and a defective discharging tube can be quickly and easily exchanged. SOLUTION: For the discharging tube device, used for a light source of a liquid crystal display device or the like, composed of a cold cathode discharging tube having sealed metals sealed at both ends of a glass bulb and rubber holders 4, 4' detachably mounted to the sealed metals, the rubber holders 4, 4' has lead wires 8, 8' and a terminal combining member 1 to be fitted to the sealed metal 10, 10'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge tube device using a cold cathode discharge tube used for an illumination light source such as a liquid crystal display device.

[0002]

2. Description of the Related Art Conventionally, a cold cathode discharge tube 9 as shown in FIG.
There is known a discharge tube device as shown in FIG. The cold cathode discharge tube 9 is used as a light source for illuminating a liquid crystal display device or the like by emitting light by applying a predetermined voltage between a pair of electrodes sealed at both ends of a glass bulb, Sealing in which a rare gas such as argon or neon and mercury are enclosed in a glass bulb having a fluorescent coating formed on the inner peripheral surface and which are connected to electrodes (not shown) in the glass bulb and sealed at both ends of the glass bulb. Metals 10 and 10 'are provided.

Lead wires 11 and 11 'for power supply are fixed to the portions of the sealing metals 10 and 10' which are drawn out from the cold cathode discharge tube 9 by soldering or the like. The discharge tube device is formed by mounting the rubber holders 12 and 12 'on the fixed lead wires 11 and 11' and the externally drawn portions of the sealing metals 10 and 10 '.

[0004]

By the way, in the conventional discharge device as described above, the lead wire 1 which is not a fixed size is used.
The operation of covering and mounting the rubber holders 12, 12 'on the sealing metal 10, 10' and the cold cathode discharge tube 9 via 1, 11 'is troublesome, and it is difficult to efficiently perform the assembling work. .

When the cold cathode discharge tube 9 is replaced with a new one in case of failure, not only the rubber holders 12 and 12 'have to be removed from the lead wires 11 and 11' by peeling them off, but also a new one. When attaching the rubber holders 12 and 12 'to the cold cathode discharge tube 9, it is necessary to perform the same troublesome operation as in the assembling work, and there is a disadvantage that much labor and time are wasted.

The present invention has been made in order to eliminate the above-mentioned inconvenience, and the operation of incorporating a rubber holder into a cold cathode discharge tube and the operation of replacing a defective discharge tube can be performed quickly and easily. An object is to provide a discharge tube device that can be performed.

[0007]

The invention according to claim 1 is
A discharge tube device used for an illumination light source such as a liquid crystal display device, wherein cold cathode discharge tubes in which terminals of electrodes sealed at respective ends of a glass bulb are concentrically projected, and the electrodes And a rubber holder that is detachably attached to the terminal, and the rubber holder has a terminal coupling member that is equipped with a lead wire and is externally fitted to the terminal. Is.

According to the present invention, the rubber holder can be attached to the cold cathode discharge tube by a simple operation of externally fitting the terminal connecting member to the terminal. In the case of the conventional rubber holder, the rubber holder is extended to the electrode. The rubber holder must be attached to the cold cathode discharge tube by fitting the lead wire,
There is no inconvenience that the mounting operation of the rubber holder is troublesome and takes a lot of time and effort.Therefore, it is easy and easy to combine the rubber holder with the cold cathode discharge tube and replace the defective cold cathode discharge tube. You will be able to do it quickly.

According to a second aspect of the present invention, in the first aspect of the present invention, the terminal coupling member has a terminal fitting hole having a hole diameter dimension slightly smaller than the outer diameter dimension of the terminal, and the terminal fitting member. It is characterized in that it has a notched groove formed by notching from the hole to the outside.

According to the present invention, the terminal connecting member is relatively pressed in the direction of the cold cathode discharge tube in a state where the terminal is fitted in the fitting hole, and the pressing force causes the terminal connecting member to have a notch groove. Are elastically deformed so as to expand and the diameter of the fitting hole is expanded, so that the terminal is fitted into the fitting hole and the rubber holder is attached to the cold cathode discharge tube. When the rubber holder is attached to the cold cathode discharge tube, the terminal is clamped by the elastic force of the elastic deformation of the terminal coupling member with the fitting hole expanded, so that the terminal and the terminal coupling member are tightened. With this, a reliable electrical connection is secured with the rubber holder, and the rubber holder is prevented from coming off from the cold cathode discharge tube.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the invention described above, the rubber holder has a fitting hole into which the cold cathode discharge tube is fitted, a terminal insertion hole into which the terminal concentric with the fitting hole is inserted, and an attachment to which the terminal coupling member is attached. It is characterized by having holes.

According to the present invention, the end of the cold cathode discharge tube is fitted into the fitting hole of the rubber holder by joining the terminal of the cold cathode discharge tube to the terminal connecting member fitted in the mounting hole of the rubber holder. Since the terminal is not visible from the outside by this, the mounting state of the cold cathode discharge tube to the rubber holder becomes attractive.

Further, since the outer peripheral surface of the end portion of the cold cathode discharge tube is surrounded by the inner peripheral surface of the fitting hole, foreign matter can be effectively prevented from entering the joint portion between the terminal coupling member and the terminal. To be done.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a terminal connecting member 1 mounted on a discharge tube device according to the present invention and this terminal connecting member 1.
2 is a perspective view showing an embodiment of a rubber holder 4 to which is mounted, and FIG. 2 is a perspective view showing a state in which the rubber holder of FIG. 1 is turned upside down. 3 is a perspective view showing a state in which the terminal connecting member 1 is mounted on the rubber holder 4, and FIG. 4 is a cross-sectional view taken along the arrow line in FIG. The cold cathode discharge tube 9 according to the present invention has been described with reference to FIG. 6 in the section of the prior art except that the lead wires 11 and 11 'are not provided on the sealing metals 10 and 10'. In the following description, the lead wires 11 and 11 ′ are the same as those described above.
Parts numbers related to the cold cathode discharge tube 9 except for FIG.
The same symbols as those shown in are adopted.

First, as shown in FIG. 1, the terminal connecting member 1
Is a cold cathode discharge tube 9 attached to the rubber holder 4.
It is for fitting the sealing metal 10 of No. 3, and is formed of a flat rectangular parallelepiped metal piece. In the present embodiment, a good conductor such as nickel or copper, or an alloy thereof is used as the metal piece. The terminal coupling member 1 is fitted with a terminal having a diameter slightly smaller than the diameter of the terminal (sealing metal 10 (FIG. 6)) of each electrode of the cold cathode discharge tube 9 formed at the center position. It has a hole 2.

A cutout groove 3 is formed in the terminal coupling member 1 so as to open the upper part from the terminal fitting hole 2 toward the upper edge of the terminal coupling member 1 in FIG. Is provided, and on the opposite side of the cutout groove 3, there is provided a bottomed cutout groove 3 ′ formed by cutting toward the lower edge portion.

According to the structure of the terminal coupling member 1, the sealing metal 10 is pressed toward the terminal fitting hole 2 with the tip of the sealing metal 10 facing the terminal fitting hole 2. With this pressing force, the terminal coupling member 1 is elastically deformed in the direction in which the groove width of the cutout groove 3 expands with the bottom portion of the cutout groove 3 ′ as a fulcrum, and the terminal fitting hole 2 is expanded by this to seal The metal 10 is fitted into the terminal fitting hole 2.

In the sealing metal 10, the inner peripheral surface of the terminal fitting hole 2 is sealed by the elastic force of the terminal coupling member 1 which is elastically deformed while being fitted in the terminal fitting hole 2. Since the outer peripheral surface of is pressed, the frictional force thereby prevents the terminal fitting hole 2 from coming off, and the sealing metal 10 is electrically connected to the terminal coupling member 1 through the fitting hole 2.

The rubber holder 4 has a size such that the terminal connecting member 1 can be installed therein, and is formed in a rectangular parallelepiped shape similar to the terminal connecting member 1, and the lower edge portion (upside down) of FIG. Further, there is provided a mounting hole 7 formed in a state of being hollowed out from the upper edge portion in FIG. The mounting hole 7 is sized slightly smaller than the three-dimensional size of the terminal coupling member 1,
Moreover, it is formed in a shape substantially similar to the terminal coupling member 1. Therefore, by press-fitting the terminal coupling member 1 into the mounting hole 7, as shown in FIG. 4, the terminal coupling member 1 is prevented from coming off while being clamped by the inner peripheral surface of the mounting hole 7.

The rubber holder 4 has a hole diameter dimension larger than the hole diameter dimension of the terminal fitting hole 2 into which the end portion of the cold cathode discharge tube 9 is fitted at a position concentric with the terminal fitting hole 2 on the surface thereof. The fitting hole 5 at the bottom is provided with a recess, and the bottom of the fitting hole 5 is provided with a terminal insertion hole 6 that is concentric and penetrates toward the mounting hole 7. The hole diameter of the terminal insertion hole 6 is set to a size such that the sealing metal 10 can be fitted in the sliding contact state.

A lead wire 8 (FIG. 3) is attached by soldering to an appropriate place of the terminal coupling member 1 (specifically, the lower edge portion of the terminal coupling member 1 shown in FIG. 1).
Therefore, by fitting the terminal connecting member 1 to which the lead wire 8 is attached into the mounting hole 7, the lead wire 8 connected to the terminal connecting member 1 from the lower edge portion of the rubber holder 4 as shown in FIG. Will be pulled out.

Since the terminal connecting member 1 and the rubber holder 4 according to the present invention are configured as described above, when the terminal connecting member 1 is mounted in the mounting hole 7 of the rubber holder 4,
By inserting the sealing metal 10 into the terminal insertion hole 6 of the rubber holder 4, the sealing metal 10 is inserted into the terminal fitting hole 2 of the terminal coupling member 1 in the mounting hole 7 and the cold cathode discharge tube 9 is inserted. The end portion of the cold cathode discharge tube 9 is fitted into the fitting hole 5 of the rubber holder 4, and as shown in FIG.
The left end of is attached to the rubber holder 4.

The right end of the cold cathode discharge tube 9 is also constructed in exactly the same manner as the rubber holder 4 for the left end, and is internally provided with a lead wire 8'for the sealing metal 10 'at the right end. A rubber holder 4'having a terminal connecting member is provided, and the rubber holders 4 and 4'are attached to the left and right ends of the cold cathode discharge tube 9 so that the present invention as shown in FIG. The discharge tube device according to is completed.

As described in detail above, the discharge tube device of the present invention is used for an illumination light source of, for example, a liquid crystal display device, and electrodes (not shown) sealed at both ends of a glass bulb. The cold cathode discharge tube 9 having the sealing metals 10 and 10 'connected to it and the rubber holders 4 and 4'which are detachably attached to the sealing metals 10 and 10' are configured. , 4'includes lead wires 8 and 8 ', and the terminal coupling member 1 into which the sealing metal 10, 10' is fitted.
Therefore, the rubber holders 4 and 4 ′ can be attached to the cold cathode discharge tube 9 by a simple operation of fitting the sealing metals 10 and 10 ′ into the terminal coupling member 1. Therefore, the work of combining the rubber holders 4 and 4'with the cold cathode discharge tube 9 and the work of replacing the failed cold cathode discharge tube 9 can be performed easily and quickly.

The sealing metal 1 is attached to the terminal connecting member 1.
Since the terminal fitting hole 6 having a hole diameter dimension slightly smaller than the outer diameter dimension of 0 and 10 'and the notch groove 3 formed by cutting out from the terminal fitting hole 6 to the outside are provided, sealing is performed. Metal 1
By pressing the rubber holder with 0 and 10 'fitted in the terminal insertion hole 6, the terminal connecting member 1 is relatively pressed in the direction of the cold cathode discharge tube 9, and the terminal connecting is performed by this pressing force. The member 1 is elastically deformed so that the notch groove 3 expands, and the terminal fitting hole 6 expands in diameter, whereby the sealing metal 10, 10 ′ can be fitted into the terminal insertion hole 6.

When the rubber holders 4 and 4'are attached to the cold cathode discharge tube 9, the sealing metal 1 is elastically deformed by the elastic deformation of the terminal coupling member 1 having the expanded diameter of the terminal insertion hole 6.
Since 0 and 10 ′ are tightened, it is possible to secure an electrically reliable connection state between the sealing metal 10 and 10 ′ and the terminal coupling member 1, and also the rubber holders 4 and 4. It is possible to easily set the ′ to the cold cathode discharge tube 9 in a retaining state.

[0027]

As described above, according to the present invention, since the rubber holder has the terminal coupling member that fits with the terminal of the sealing metal of the cold cathode discharge tube, the rubber holder is sealed with the terminal coupling member. The rubber holder can be attached to the cold cathode discharge tube by a simple operation of fitting and connecting the terminal of the stop metal. Therefore, in the case of the conventional rubber holder, the rubber holder must be mounted on the cold cathode discharge tube by fitting the lead wire connected to the electrode, and the mounting operation of the rubber holder is troublesome and requires a lot of labor and time. However, in the case of the present invention, the work of combining the rubber holder with the cold cathode discharge tube and the operation of replacing the defective cold cathode discharge tube with ease and speed are achieved. be able to.

In the terminal coupling member of the present invention, the terminal fitting hole having a hole diameter slightly smaller than the outer diameter of the terminal and the notch groove formed by cutting out from the terminal fitting hole to the outside are formed. Since the terminal coupling member is relatively pressed in the direction of the cold cathode discharge tube in a state where the terminal is fitted in the fitting hole, this pressing force causes the notch groove of the terminal coupling member to widen. By elastically deforming, the fitting hole expands in diameter, and by fitting the terminal into the fitting hole, the rubber holder can be easily attached to the cold cathode discharge tube. When the rubber holder is attached to the cold cathode discharge tube, the terminal is clamped by the elastic force of the elastic deformation of the terminal coupling member with the fitting hole expanded, so that the terminal and the terminal coupling member are tightened. It is possible to ensure an electrically reliable connection with the rubber holder and to prevent the rubber holder from coming off the cold cathode discharge tube.

Further, in the rubber holder of the present invention, a fitting hole into which the end of the cold cathode discharge tube is fitted, and a terminal insertion hole into which the terminal of the sealing metal concentric with the fitting hole is inserted. And a mounting hole for mounting the terminal coupling member, the cold cathode discharge is formed by coupling the terminal of the sealing metal of the cold cathode discharge tube with the terminal coupling member fitted in the mounting hole of the rubber holder. The end of the tube is fitted into the fitting hole of the rubber holder, so that the terminal cannot be seen from the outside, and the state of attachment of the cold cathode discharge tube to the rubber holder can be made attractive. At the same time, since the outer peripheral surface of the end of the cold cathode discharge tube is surrounded by the inner peripheral surface of the fitting hole, foreign matter can be effectively prevented from entering the joint portion between the terminal coupling member and the terminal from the outside. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a terminal coupling member mounted on a discharge tube device according to the present invention and a rubber holder mounting the terminal coupling member.

FIG. 2 is a perspective view showing a state where the rubber holder in FIG. 1 is turned upside down.

FIG. 3 is a perspective view showing a state where a terminal connecting member is attached to the rubber holder shown in FIG.

FIG. 4 is a transverse sectional view taken along the arrow line in FIG.

FIG. 5 is a perspective view showing an embodiment of a discharge tube device according to the present invention.

FIG. 6 is a perspective view showing a conventional cold cathode discharge tube.

7 is a perspective view showing a conventional discharge tube device including the cold cathode discharge tube of FIG.

[Explanation of symbols]

1-terminal coupling member 2-terminal fitting hole 3 Notch groove 3'cut groove 4,4 'rubber holder 5 fitting holes 6 terminal insertion hole 7 mounting holes 8,8 'Lead wire 9 Cold cathode discharge tube 10,10 'Sealing metal

Claims (3)

[Claims] 1. A discharge tube device used as a light source for an illumination device, comprising: a cold cathode discharge tube in which sealing metals sealed at both ends of a glass bulb are concentrically provided, respectively; A discharge tube device, comprising: a rubber holder detachably attached to a stop metal, wherein the rubber holder has a terminal coupling member to which a lead wire is attached and the sealing metal is inserted. 2. The terminal coupling member comprises a fitting hole having a hole diameter slightly smaller than the outer diameter of the sealing metal, and a notch groove formed by cutting out from the fitting hole to the outside. Item 1
The discharge tube device described. 3. The rubber holder has a fitting hole into which an end portion of the cold cathode discharge tube is fitted, a terminal insertion hole into which a sealing metal is inserted, and a mounting hole to which a terminal coupling member is attached. The discharge tube device according to claim 1 or 2.