JP2004259645A - Wire connecting terminal for cold cathode tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal whereby work to connect a wire to an electrode of a cold cathode tube can be speedily, reliably, and highly efficiently carried out by using an automatic machine. <P>SOLUTION: This wire connecting terminal 100 for the cold cathode tube has a terminal 10 having a contact part 12 making contact with the bar-like electrode 5 of the cold cathode tube 1 while accepting it when the contact part moves in the axial direction of the cold cathode tube 1, and a flexible and cylindrical external fitting part 35 externally fitted to the glass tube part 1b of the cold cathode tube 1 before the contact part 12 of the terminal 10 comes into contact with the bar electrode 5. Thereby, since the contact part 12 of the terminal 10 makes contact with the bar-like electrode 5 after the terminal 10 is aligned to the axial line of the cold cathode tube 1 by engagement of the cold cathode tube 1 and the external fitting part 35, the contact part 12 does not damage the glass tube part 1b of the cold cathode tube 1 by applying a bending moment to the bar-like electrode 5. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a terminal for connecting an electric wire extending in a vertical direction to a rod-shaped electrode of a cold-cathode tube used as backlight illumination or the like of a liquid crystal display device. The present invention relates to a connection terminal improved so that a connection operation can be performed quickly and reliably and with extremely high efficiency using an automatic machine.
[0002]
[Prior art]
Conventionally, a cold cathode tube, which is a small and ultra-fine fluorescent lamp, is used as a backlight of a liquid crystal display device or an illumination of an image reading device, and an electric wire for power supply is connected to an electrode of the cold cathode tube. There is a need.
[0003]
Therefore, conventionally, as shown in FIG. 13, a connection terminal 4 having an annular connection portion 3 is fixed to an end of an electric wire 2 for feeding power to the cold cathode tube 1, and the cold cathode tube 1 is connected to the annular connection portion 3. An operation of inserting the rod-shaped electrode 5 and then soldering the annular connection portion 3 to the rod-shaped electrode 5 is performed (for example, see Patent Document 1).
[0004]
However, when the rod-shaped electrode 5 is inserted into the ring-shaped connecting part 3, the ring-shaped connecting part 3 is inclined with respect to the axis of the rod-shaped electrode 5 as shown by a pair of arrows in FIG. The annular connecting portion 3 may fall off from the rod-shaped electrode 5 due to elasticity.
As a result, it has been extremely difficult to automate the work of soldering the annular connection portion 3 to the rod-shaped electrode 5.
[0005]
Therefore, a terminal having an electrode fitting portion that is fitted to the rod-shaped electrode 5 of the cold cathode tube 1 has been proposed (see Patent Document 2).
[0006]
On the other hand, connection terminals for connecting electric wires extending parallel to the surface of the printed wiring board to plug pins protruding from the surface of the printed wiring board are also used (for example, see Patent Document 3).
[0007]
[Patent Document 1]
JP 2002-124308 A (FIG. 3)
[Patent Document 2]
JP 2001-250605 A (FIG. 1)
[Patent Document 3]
JP-A-6-84682 (FIGS. 1 and 2)
[0008]
[Problems to be solved by the invention]
However, in the cold cathode tube, a rod-shaped electrode having an outer diameter of about 0.5 mm and a total length of about 3 mm was fixed to the end of a glass tube having an outer diameter of 1 to 5 mm and a total length of about 100 to 900 mm. Things.
[0009]
Therefore, for example, when trying to connect the electric wire 2 to the rod-shaped electrode 5 of the cold-cathode tube 1 using the plug pin connection terminal described in Patent Document 3, a bending moment acts on the rod-shaped electrode 5 and the cold cathode The tube 1 is easily broken.
As a result, it has been impossible to automate the connection operation using the connection terminals for plug pins.
[0010]
Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to perform an operation of connecting an electric wire to an electrode of a cold-cathode tube quickly and reliably, and with extremely high efficiency using an automatic machine. To provide a connection terminal.
[0011]
[Means for Solving the Problems]
Means described in claim 1 for solving the above-mentioned problems is as follows.
A terminal for connecting an electric wire extending in a direction perpendicular to the axis of the cold cathode tube to a rod-shaped electrode of the cold cathode tube,
A main body portion extending in the extension direction of the electric wire and having a core wire of the electric wire fixed to the base end side thereof, and the main body portion being connected to the distal end side of the main body portion and being displaced in the axial direction of the cold cathode tube. A terminal having a contact portion that contacts the rod-shaped electrode;
A storage portion for storing the terminal, and a flexible cylindrical outer fitting which is fitted to the glass tube portion of the cold cathode tube before the rod-shaped electrode comes into contact with the contact portion when displaced in the axial direction of the cold cathode tube. A terminal housing having a fitting portion,
An electric wire connection terminal for a cold cathode tube, comprising:
[0012]
That is, according to the electric wire connection terminal described in claim 1, when the operation of connecting the electric wire to the rod-shaped electrode of the cold cathode tube is performed, first, the outer fitting portion of the terminal housing is attached to the glass tube portion of the cold cathode tube. The terminal housing is centered on the axis of the cold cathode tube by external fitting.
At this time, since the outer fitting portion has flexibility, in other words, it is soft like rubber and has flexibility that allows some deformation, so that the terminal housing is positioned with respect to the axis of the cold cathode tube. Even if the external fitting portion is externally fitted to the cold cathode tube in the inclined state, the external fitting portion does not damage the glass tube portion of the cold cathode tube.
Then, the rod-shaped electrode of the cold-cathode tube comes into contact with the contact portion of the terminal after the terminal housing, that is, the terminal is aligned with the axis of the cold-cathode tube by fitting the glass tube portion of the cold-cathode tube and the outer fitting portion. Therefore, the contact portion of the terminal does not exert a bending moment on the rod-shaped electrode of the cold-cathode tube, so that the glass tube portion of the cold-cathode tube is not damaged.
Further, since the outer fitting portion is fitted to the glass tube portion of the cold-cathode tube to generate a retaining function, it is possible to prevent the terminal from falling off from the rod-shaped electrode of the cold-cathode tube.
In other words, the function of preventing the terminal from falling off from the rod-shaped electrode of the cold-cathode tube is performed by the outer fitting portion, so that the contact portion of the terminal can be configured more flexibly. Thereby, the bending moment applied to the rod-shaped electrode of the cold cathode tube by the contact portion of the terminal can be further reduced.
In addition, since it is not necessary to solder a terminal to the rod-shaped electrode of the cold-cathode tube, the connection operation can be performed in a lead-free and fluxless clean working environment.
In addition, since the cold-cathode tube heat-generating portion is covered by the outer fitting portion, components disposed around the cold-cathode tube can be protected from heat.
Therefore, according to the electric wire connection terminal of the first aspect, the operation of connecting the electric wire to the rod-shaped electrode of the cold-cathode tube can be performed quickly, reliably, and with extremely high efficiency using an automatic machine.
[0013]
According to a second aspect of the present invention, in the electric wire connection terminal according to the first aspect, the outer fitting portion has a rigidity of the outer fitting portion such that flexibility and flexibility increase toward a distal end side. It is characterized by having rigidity changing means for changing.
As the stiffness changing means, a method of reducing the thickness of the outer fitting portion toward the distal end side, or the thickness of the outer fitting portion is constant but the height of the reinforcing rib erected on the outer surface thereof is determined by the outer fitting portion. Or a method in which the thickness of the outer fitting portion is constant but the depth of the concave groove formed in the outer surface or the inner surface thereof is increased.
Further, by forming a slit at the tip of the outer fitting portion, the rigidity of the tip of the outer fitting portion can be reduced.
Furthermore, by gradually changing the composition of the material from the base end side to the distal end side of the outer fitting portion, the flexibility and flexibility can be increased toward the distal end side of the outer fitting portion.
[0014]
That is, in the electric wire connection terminal according to the second aspect, since the flexibility and flexibility are higher toward the distal end side, the work of first externally fitting the distal end of the outer fitting portion to the glass tube portion of the cold cathode tube is ensured. Can be done.
In addition, since the flexibility becomes lower toward the base end side, in other words, the rigidity becomes higher toward the base end side, the terminal housing, that is, the terminal can be securely aligned with the axis of the cold cathode tube.
[0015]
According to a third aspect of the present invention, in the electric wire connection terminal according to the first or second aspect, the outer fitting portion includes a guide surface that guides a tip of the rod-shaped electrode toward a contact portion of the terminal. It is characterized by having it inside.
[0016]
That is, according to the wire connection terminal described in claim 3, the rod-shaped electrode of the cold cathode tube can be reliably guided toward the contact portion of the terminal by the guide surface provided inside the outer fitting portion.
Thus, it is possible to reliably prevent the contact portion of the terminal from applying a bending moment to the rod-shaped electrode of the cold cathode tube to damage the glass tube of the cold cathode tube.
[0017]
According to a fourth aspect of the present invention, in the electric wire connection terminal according to any one of the first to third aspects, the outer fitting portion is formed in a cylindrical shape having a bottom wall, and the guide surface is provided in the contact surface. The inner wall surface is a tapered hole penetrating the bottom wall so as to face the portion.
[0018]
That is, in the electric wire connection terminal according to the fourth aspect, since the bottom wall exists at the bottom of the outer fitting portion, which is the portion closest to the terminal, the rigidity of the bottom of the outer fitting portion can be increased. Thus, the terminal housing can be reliably aligned with the axis of the cold cathode tube.
Further, since the tapered hole as the guide surface is formed through the bottom wall closest to the terminal, the rod-shaped electrode of the cold cathode tube can be reliably guided toward the contact portion of the terminal.
[0019]
According to a fifth aspect of the present invention, in the wire connection terminal according to any one of the first to fourth aspects, the terminal housing is formed of an electrically insulating hard resin material for housing the terminal. It is characterized by having a housing main body, and a cover molded from a flexible and flexible polymer material having the outer fitting portion and attached to the housing main body.
[0020]
That is, in the electric wire connection terminal according to the fifth aspect, the housing body for housing the terminal can be formed from a hard resin material, and the cover can be formed from a soft polymer material. Each can be manufactured from the most suitable material.
In addition, since the soft cover covers the hard housing body, even if the connection terminal is dropped with the connection terminal attached to the cold cathode tube, the connection terminal which is heavier than the cold cathode tube can be softened. Since the cover is grounded first and absorbs the impact of the fall, it is possible to prevent the cold cathode tube from being damaged.
Further, when the gripper of the automatic working machine grips the connection terminal, the housing body is gripped via the soft cover. As a result, the connection terminal can be displaced to some extent with respect to the grip portion of the automatic working machine by the elastic deformation of the soft cover. Therefore, the function of centering the rod-shaped electrode and the contact portion of the terminal by the outer fitting portion being fitted to the glass tube portion of the cold cathode tube is not hindered by the gripping portion of the automatic working machine.
Therefore, according to the electric wire connection terminal of the fifth aspect, the operation of connecting the electric wire to the rod-shaped electrode of the cold cathode tube can be performed quickly, reliably, and with extremely high efficiency using an automatic machine.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, with reference to FIG. 1 to FIG. 12, each embodiment of the wire connection terminal for a cold cathode tube according to the present invention will be described in detail.
In the following description, the axis direction of the cold cathode tube is referred to as the front-back direction, the direction perpendicular to the horizontal direction with respect to the axis of the cold cathode tube is referred to as the left-right direction, and the direction perpendicular to the vertical direction is referred to as the up-down direction.
Further, the same reference numerals are used for the same portions as those in the above-described conventional technology.
[0022]
The cold cathode tube electric wire connection terminal 100 of the present embodiment shown in FIGS. 1 to 5 is for connecting the electric wire 2 for feeding the cold cathode tube 1 to the rod-shaped electrode 5 of the cold cathode tube 1. 2 includes a pair of left and right terminals 10 connected to the housing 2, a housing main body 20 for housing these terminals therein, and a cover 30 attached to the housing main body 20.
[0023]
The terminal 10 is formed by press-forming a conductive metal plate, and contacts the main body portion 11 extending in the extension direction of the electric wire 2 and the rod-shaped electrode 5 of the cold cathode tube 1 to electrically connect the electric wire 2. And a contact portion 12.
As shown in FIGS. 3 and 4, the body portion 11 of the terminal 10 has a portion 13 for gripping and fixing the insulating sheath portion of the electric wire 2 and a portion for gripping and fixing the exposed core wire of the electric wire 2. 14 are provided.
Further, the main body portion 11 is provided with an insertion hole 15 for receiving the tip of the rod-shaped electrode 5 and an engagement projection 16 for engaging with the lance 26 of the housing main body 20 to prevent the terminal 10 from coming off. I have.
As shown in FIG. 5, the contact portion 12 has a pair of elastic holding pieces 12a and 12b for holding the rod-shaped electrode 5 that has entered in the axial direction in the left-right direction.
[0024]
The housing main body 20 is a member injection-molded from polybutylene terephthalate (PBT), which is one of electrically insulating hard resin materials. The housing main body 20 holds the main body portion 21 for housing the terminal 10 inside the cover 30 and the cover 30. And the front wall 24 on which the contact portion 12 of the terminal 10 is in close contact.
Further, a tapered hole 25 for guiding the rod-shaped electrode 5 of the cold cathode tube 1 toward the contact portion 12 of the terminal 10 is formed through the front wall 24.
[0025]
Examples of hard and electrically insulating hard resin materials include polyamide (PA), polyacetal (POM), polycarbonate (PC), modified polyphenylene ether (PPE), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), and polyarylate. (PAR), liquid crystal polymer (LCP), special engineering plastics (SEP), fluororesin (FR), thermoplastic elastomer (TPEE), acrylonitrile butadiene styrene copolymer (ABS), ethylene tetrafluoride ethylene copolymer ( E / TFE), ethylene vinyl alcohol copolymer (EVOH), ethylene tetrafluoride propylene hexafluoride copolymer (FEP), polyamide imide (PAI), polyallyl ether kent (PAEK), polyarylate ( AR), polycyclohexane terephthalate (PCT), ethylene trifluoride chloride polymer (PCTFE), polyetheretherketone (PEEK), polyetherimide (PEI), polyetherketone (PEK), polyetherketoneketone (PEKK) , Polyethylene naphthalate (PEN), polyethersulfone (PES), ethylene tetrafluoroalkoxyether copolymer (PFA), polyimide (PI), polypropylene (PP), polysulfone (PSU), polythioethersulfone (PTES), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), thermoplastic ester elastomer (TPEE) and the like.
[0026]
The cover 30 is a member that is injection-molded from silicone rubber, which is a polymer material having high flexibility and flexibility and high heat resistance, and has a main body portion 31 that fits outside the housing main body 20.
When the housing main body 20 is inserted into the internal space 32 of the main body portion 31, the engaging projections 22, 23 of the housing main body 20 engage with the engaging holes 33, 34, respectively, and the housing main body 20 is integrally assembled inside the cover 30. Can be
[0027]
Examples of the polymer material having flexibility and flexibility include natural rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, nitrile butadiene rubber, ethylene propylene rubber, butyl rubber, chlorosulfonated polyethylene, acrylic rubber, Examples thereof include urethane rubber, fluorine rubber, and polysulfide rubber.
[0028]
A pair of left and right through-holes 36, 36 having a circular cross-sectional shape and receiving the tip portions 1a of the pair of left and right cold cathode tubes 1, 1, respectively, penetrate through the outer fitting portion 35 connected to the main body portion 31, respectively. Is established.
In other words, the outer fitting portion 35 has a structure in which a pair of left and right cylinders that respectively receive the tip portions 1a of the pair of left and right cold cathode tubes 1 are integrally connected.
The inner diameter of the insertion holes 36, 36 is set slightly smaller than the outer diameter of the tip portion 1a of the cold cathode tube 1. When the tip portion 1a is received, the inner wall surface of the insertion hole 36 is formed on the outer surface thereof. It comes into close contact.
[0029]
Further, the outer fitting portion 35 has a bottom wall 37 that is in close contact with the front wall 24 of the housing body 20.
A tapered hole 38 coaxial with the tapered hole 25 of the housing body 20 penetrates through the bottom wall 37, and the inner wall surface thereof has a guide surface for guiding the tip of the rod-shaped electrode 5 to the contact portion 12 of the terminal 10. Has become.
[0030]
Further, a thinned portion 39 is provided on the lower surface of the distal end of the outer fitting portion 35.
Thereby, the distal end portion of the outer fitting portion 35 can be easily expanded, so that the operation of externally fitting the distal end of the outer fitting portion 35 to the distal end portion 1a of the cold cathode tube 1 can be easily performed.
[0031]
Next, an operation of connecting the electric wire 2 to the rod-shaped electrode 5 of the cold cathode tube 1 using the electric wire connection terminal 100 for a cold cathode tube of the present embodiment having the above-described structure will be described.
[0032]
First, after fixing the cold-cathode tube 1 at a predetermined position, the connection terminal 100 is sandwiched in the left-right direction by the gripper of the automatic working machine so that the cold-cathode tube 1 and the outer fitting portion 35 are coaxial with each other. Position the connection terminal 100.
At this time, since the gripping portion of the automatic working machine sandwiches the hard housing body 20 via the soft cover 30, the connection terminal 100 is attached to the gripping portion of the automatic working machine by the elastic deformation of the soft cover 30. Some relative displacement is possible.
Therefore, the function of centering the rod-shaped electrode 5 and the contact part 12 of the terminal 10 by the external fitting part 35 being externally fitted to the glass tube part of the cold cathode tube 1 is not hindered by the gripping part of the automatic working machine.
[0033]
Next, by gradually displacing the connection terminal 100 toward the cold cathode tube 1 along the axis of the cold cathode tube 1, the tip of the outer fitting portion 35 is attached to the tip 1a of the cold cathode tube 1 as shown in FIG. Fit gradually.
At this time, since the distal end of the outer fitting portion 35 can be easily expanded by the action of the thinned portion 39, the operation of externally fitting the distal end of the outer fitting portion 35 to the distal end 1a of the cold cathode tube 1 is easily performed. be able to.
[0034]
Further, when performing the operation of externally fitting the tip of the outer fitting portion 35 to the tip 1 a of the cold cathode tube 1, a slight shift or inclination occurs between the axis of the cold cathode tube 1 and the axis of the insertion hole 36. However, as shown in FIG. 7, the outer fitting portion 35 having flexibility and flexibility deforms and follows the outer surface of the cold cathode tube 1.
This prevents the glass tube portion 1b of the cold cathode tube from being damaged during the work of externally fitting the end of the external fitting portion 35 to the end 1a of the cold cathode tube 1.
[0035]
Further, even when a slight deviation or inclination occurs between the axis of the cold cathode tube 1 and the axis of the insertion hole 36, the tip of the rod-shaped electrode 5 is formed by the inner wall surface of the tapered hole 38 as shown in FIG. It is guided to a tapered hole 25 penetrating through the front wall 24 of the housing body 20.
Thus, it is possible to prevent the tip of the rod-shaped electrode 5 from abutting against the bottom wall 37 of the outer fitting portion 35.
[0036]
Further, since the bottom wall 37 of the insertion hole 36 increases the rigidity of the base end side of the outer fitting portion 35, when the distal end 1 a of the cold cathode tube 1 enters deep into the insertion hole 36, the cold cathode tube 1 The axis and the axis of the insertion hole 36 can be surely aligned.
Thus, when the rod-shaped electrode 5 enters the contact portion 12 of the terminal 10, the contact portion 12 does not exert a bending moment on the rod-shaped electrode 5 and does not damage the glass tube portion 1 b of the cold cathode tube 1.
[0037]
Further, the rod-shaped electrode 5 is guided to the contact portion 12 of the terminal 10 by being guided by the inner wall surface of the tapered hole 25 provided through the front wall 24 of the housing body 20.
Thereby, the tip of the rod-shaped electrode 5 can be reliably guided to the contact portion 12 of the terminal 10.
[0038]
Therefore, according to the cold-cathode tube electric wire connection terminal 100 of the present embodiment, the operation of connecting the electric wire 2 to the rod-shaped electrode 5 of the cold-cathode tube 1 can be performed quickly and reliably, and with extremely high efficiency using an automatic machine. It becomes possible.
[0039]
Further, since the outer fitting portion 35 is fitted to the glass tube portion of the cold-cathode tube 1 to prevent the terminal 10 from falling off, it is possible to reliably prevent the terminal 10 from falling off from the rod-shaped electrode 5 of the cold-cathode tube 1. .
In other words, the function of preventing the terminal 10 from falling off from the rod-shaped electrode 5 of the cold-cathode tube 1 is performed by the outer fitting part 35, so that the contact part 12 of the terminal 10 can be configured more flexibly.
Thereby, the bending moment applied to the rod-shaped electrode 5 of the cold cathode tube 1 by the contact portion 12 of the terminal 10 can be further reduced.
[0040]
Furthermore, since it is not necessary to solder to connect the rod-shaped electrode 5 of the cold cathode tube 1 and the terminal 10, the connection operation can be performed in a lead-free and fluxless clean working environment.
[0041]
In addition, since the soft cover 30 covers the hard housing body 20, even if the connection terminal 100 is dropped with the connection terminal 100 attached to the cold cathode tube 1 as shown in FIG. Since the soft cover 30 of the connection terminal 100, which is heavier than that of the connection terminal 100, is grounded first and absorbs the impact of the drop, the breakage of the cold cathode tube 1 can be prevented.
[0042]
In addition, since the portion where the cold-cathode tube 1 generates heat is covered by the outer fitting portion 35, components disposed around the cold-cathode tube 1 can be protected from heat.
[0043]
Next, a modified example of the above-described cold-cathode tube electric wire connection terminal 100 will be described with reference to FIGS.
[0044]
In the cold-cathode tube wire connection terminal 100 described above, by providing the thinned portion 39 on the lower surface of the distal end of the outer fitting portion 35, the rigidity of the distal end of the outer fitting portion 35 is reduced so that the outer fitting portion 35 can be easily expanded. The operation of externally fitting the tip of the portion 35 to the tip portion 1a of the cold cathode tube 1 can be easily performed.
On the other hand, in the connection terminal 110 of the first modified example shown in FIG. 8, the outer fitting portion 41 of the cover 40 is formed so that the thickness thereof becomes thinner toward the distal end side.
Thereby, since the thickness of the tip of the outer fitting portion 41 is the thinnest and can be easily expanded, the work of externally fitting the tip of the outer fitting portion 41 to the tip portion 1a of the cold cathode tube 1 can be easily performed. Can be.
In addition, since the thickness of the base end side of the outer fitting portion 41 is the thickest and has the highest rigidity, when the distal end portion 1a of the cold cathode tube 1 enters deep into the outer fitting portion 41, the distal end portion of the cold cathode tube 1 1a and the outer fitting portion 41 can be reliably centered.
Thereby, when the rod-shaped electrode 5 enters the contact portion 12 of the terminal 10, the contact portion 12 reliably prevents the glass tube portion 1 b of the cold cathode tube 1 from being damaged by applying a bending moment to the rod-shaped electrode 5. it can.
[0045]
Further, in the connection terminal 120 of the second modified example shown in FIG. 9, the thickness of the outer fitting portion 42 is constant, but the height of the reinforcing rib 43 erected on the outer surface thereof is increased. 42 is lower toward the distal end and higher toward the proximal end.
Thereby, the rigidity of the outer fitting portion 42 can be set to be lower toward the distal end and higher toward the proximal end.
[0046]
Further, the outer fitting portion 44 of the connection terminal 130 of the third modified example shown in FIG. 10 is configured such that its thickness gradually decreases toward the distal end side.
Thereby, the rigidity of the outer fitting portion 44 can be set lower on the distal end side and higher on the proximal end side.
[0047]
In addition, a plurality of slits 45a, 45b extending in the axial direction are formed at regular intervals in the circumferential direction on the outer surface of the outer fitting portion 45 in the connection terminal 140 of the fourth modified example shown in FIG. . These slits 45a and 45b are formed so as to be deeper toward the distal end of the outer fitting portion 45.
Thus, the rigidity of the outer fitting portion 45 can be set to be lower toward the distal end and higher toward the proximal end.
[0048]
As mentioned above, although one Embodiment of the electric wire terminal for cold cathode tubes which concerns on this invention was described in detail, it cannot be overemphasized that this invention is not limited by the above-mentioned embodiment and various changes are possible.
For example, each of the connection terminals described above is one in which the housing body and the cover are separately molded and then integrally assembled.
On the other hand, like the connection terminal 200 shown in FIG. 12, the housing main body 50 and the outer fitting portion 60 are integrally formed, and the material composition and / or the material structure of each part is changed to change the housing main body 50. The rigidity can be reduced by making the outer fitting part 60 soft while increasing the rigidity as hard.
[0049]
In the connection terminal 200, when the terminal 10 is inserted into the internal space 52 penetrating the main body portion 51 of the housing main body 50, the engagement projection 16 is engaged with the lance 53 and is prevented from coming off.
A tapered hole 55 for guiding the rod-shaped electrode 5 of the cold cathode tube 1 is formed in one side surface 54 of the housing body 50.
Further, an outer fitting portion 60 is integrally formed on one side surface 54 of the housing body 50 coaxially with the tapered hole 55.
The cylindrical body portion 61 of the outer fitting portion 60 is provided with an insertion hole 62 for inserting the cold-cathode tube 1, and the outer end of the insertion hole 62 is fitted to the glass tube portion of the cold-cathode tube 1. A thinning portion 63 for facilitating the work is provided.
[0050]
【The invention's effect】
As is clear from the above description, the cold-cathode tube wire connection terminal according to the present invention is a terminal for connecting a wire extending in a direction perpendicular to the axis of the cold-cathode tube to the rod-shaped electrode of the cold-cathode tube. A terminal having a contact portion that receives and contacts the rod-shaped electrode of the cold-cathode tube when displaced in the axial direction of the cold-cathode tube; and a glass of the cold-cathode tube before the contact portion of the terminal comes into contact with the rod-shaped electrode. This is a structure having a flexible, cylindrical outer fitting portion that fits externally to the pipe portion.
Thereby, the contact portion of the terminal comes into contact with the rod-shaped electrode after the terminal is aligned with the axis of the cold cathode tube by fitting the cold cathode tube and the outer fitting portion, so that the contact portion of the terminal is the cold cathode. A bending moment is not applied to the rod-shaped electrode of the tube, so that the glass tube portion of the cold cathode tube is not damaged.
Therefore, according to the electric wire connection terminal of the present invention, the operation of connecting the electric wire to the rod-shaped electrode of the cold-cathode tube can be performed quickly, reliably, and with extremely high efficiency using an automatic machine.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cold-cathode tube wire connection terminal and a cold-cathode tube according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional side view of an essential part showing a state where the wire connection terminals for the cold cathode tube shown in FIG.
FIG. 3 is an enlarged view of a main part of FIG. 2;
FIG. 4 is a sectional view taken along the line IV-break shown in FIG. 3;
FIG. 5 is a sectional view taken along the line V-rupture shown in FIG. 4;
FIG. 6 is an essential part cross-sectional side view showing the operation of the cold-cathode tube electric wire connection terminal of the first embodiment.
FIG. 7 is an essential part cross-sectional side view showing the operation of the cold cathode tube electric wire connection terminal of the first embodiment.
FIG. 8 is a side view showing a first modification of the wire connection terminal for a cold cathode tube according to the first embodiment.
FIG. 9 is a side view showing a second modification of the cold cathode tube electric wire connection terminal of the first embodiment.
FIG. 10 is a side view showing a third modification of the electric wire connection terminal for a cold cathode tube of the first embodiment.
FIG. 11 is a side view showing a fourth modification of the wire connection terminal for a cold cathode tube of the first embodiment.
FIG. 12 is a longitudinal sectional view showing a cold-cathode tube electric wire connection terminal according to a second embodiment of the present invention.
FIG. 13 is a perspective view showing a conventional cold-cathode tube electric wire connection terminal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cold-cathode tube 2 Electric wire 3 Annular connection part 4 Connection terminal 5 Rod electrode 10 Terminal 11 Body part 12 Contact part 13, 14 Wire fixing part 15 Insertion hole 16 Engagement projection 20 Housing main body 21 Main body part 22, 23 Engagement projection 24 Front wall 25 Taper hole 26 Lance 30 Cover 31 Main body portion 32 Internal space 33, 34 Engagement hole 35 External fitting portion 36 Insertion hole 37 Bottom wall 38 Tapered hole 39 Thinning portion 40 Cover 41, 42 External fitting portion 43 Reinforcement rib 44 , 45 External fitting portions 45a, 45b Slit 50 Housing main body 51 Main body portion 52 Internal space 53 Lance 54 Side surface 55 Tapered hole 60 External fitting portion 61 Main body portion 62 Insertion hole 63 Thinning portion 100 Cooling of the first embodiment according to the present invention Cathode tube electric wire connection terminal 200 Cold cathode tube electric wire connection terminal of the second embodiment according to the present invention

Claims (5)

A terminal for connecting an electric wire extending in a direction perpendicular to the axis of the cold cathode tube to a rod-shaped electrode of the cold cathode tube,
A main body portion extending in the extension direction of the electric wire and having a core wire of the electric wire fixed to the base end side thereof, and the main body portion being connected to the distal end side of the main body portion and being displaced in the axial direction of the cold cathode tube. A terminal having a contact portion that contacts the rod-shaped electrode;
A storage portion for storing the terminal, and a flexible cylindrical outer fitting which is fitted to the glass tube portion of the cold cathode tube before the rod-shaped electrode comes into contact with the contact portion when displaced in the axial direction of the cold cathode tube. A terminal housing having a fitting portion,
An electric wire connection terminal for a cold cathode tube, comprising: 2. The cold cathode according to claim 1, wherein the outer fitting portion has rigidity changing means for changing the rigidity of the outer fitting portion so that flexibility and flexibility increase toward the distal end. 3. Pipe wire connection terminal. The wire connection for a cold cathode tube according to claim 1, wherein the outer fitting portion has a guide surface for guiding a tip of the rod-shaped electrode toward a contact portion of the terminal. Terminal. The outer fitting portion is formed in a cylindrical shape having a bottom wall,
4. The wire connection terminal for a cold cathode tube according to claim 1, wherein the guide surface is an inner wall surface of a tapered hole penetrating the bottom wall so as to face the contact portion. 5. The terminal housing includes:
A housing body molded from an electrically insulating hard resin material for housing the terminals,
A cover molded from a polymer material having flexibility and flexibility, which is attached to the housing main body having the outer fitting portion,
The wire connection terminal for a cold cathode tube according to any one of claims 1 to 4, comprising:

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