阅读说明：本技术 玻璃板组件 (Glass panel assembly ) 是由 吉田稔 常叶淳一 于 2020-01-31 设计创作，主要内容包括：本发明的玻璃板组件包括：玻璃体；层叠于上述玻璃体上的导电体；至少1个连接端子,其固定在上述导电层,并由导电性材料形成；和用于将上述连接端子固定在上述导电层的无铅焊料,上述连接端子包括：基部；至少1个设置部,其与上述基部连结,经由上述无铅焊料而被固定在上述导电层；供电部,其与上述基部连结,并连接对上述导电层供电的电缆；和连接部,其配置在上述基部与连接部之间,可弯曲地将上述连接部连接到上述基部。(The glass panel assembly of the present invention comprises: a glass body; a conductor laminated on the glass body; at least 1 connection terminal fixed to the conductive layer and made of a conductive material; and a lead-free solder for fixing the connection terminal to the conductive layer, the connection terminal including: a base; at least 1 setting part connected with the base part and fixed on the conductive layer through the lead-free solder; a power supply unit connected to the base and connected to a cable for supplying power to the conductive layer; and a connecting portion disposed between the base portion and the connecting portion, and configured to be bendable to connect the connecting portion to the base portion.)

1. A glass panel assembly, comprising:

a glass body;

a conductor laminated on the glass body;

at least 1 connection terminal fixed to the conductor and formed of a conductive material; and

a lead-free solder for fixing the connection terminal to the conductor,

the connection terminal includes:

a base;

at least 1 installation part connected to the base part and fixed to the conductor via the lead-free solder;

a power supply unit connected to a cable for supplying power to the conductor; and

and a connecting portion disposed between the base portion and the power supply portion, and configured to flexibly connect the power supply portion to the base portion.

2. The glass panel assembly of claim 1, wherein:

comprises a pair of the setting parts.

3. The glass panel assembly of claim 2, wherein:

the pair of installation portions are disposed on opposite sides of the base portion.

4. The glass panel assembly of any one of claims 1-3, wherein:

the connecting portion is configured to be more easily deformed than the base portion.

5. The glass panel assembly of any one of claims 1-4, wherein:

the connecting part is formed by copper-zinc alloy.

6. The glass panel assembly of any one of claims 1-5, wherein:

at least 1 projection is formed on the surface of the installation portion facing the conductor with the lead-free solder interposed therebetween.

7. The glass panel assembly of any one of claims 1-6, wherein:

the electrical conductor is formed from at least 1 heater wire.

8. The glass panel assembly of any one of claims 1-6, wherein:

the conductor is formed by at least 1 antenna.

9. The glass panel assembly of any one of claims 1-6, wherein:

the electrical conductor is formed by at least 1 dimmer or light emitter.

10. The glass panel assembly of any one of claims 1-9, wherein:

the glass body is formed by laminated glass,

the laminated glass has:

an outer glass plate;

an inner glass plate; and

and an interlayer film disposed between the outer glass plate and the inner glass plate.

11. The glass panel assembly of claim 10, wherein:

the conductor is disposed between the outer glass plate and the inner glass plate,

a notch is formed at the end edge of the inner glass plate,

the connection terminal is fixed to the conductor exposed to the outside through the notch via the lead-free solder.

12. The glass panel assembly of claim 11, wherein:

the outer glass plate is formed of an unreinforced glass.

13. The glass panel assembly of any one of claims 1-12, wherein:

the electrical conductor is formed of printed silver.

14. The glass panel assembly of any one of claims 1-13, wherein:

the lead-free solder is indium lead-free solder.

15. The glass panel assembly of any one of claims 1-14, wherein:

the melting point of the lead-free solder is below 150 ℃.

Technical Field

The present invention relates to a glass panel assembly to be attached to a window frame of a structure.

Background

For example, patent document 1 discloses a connection terminal connected to a conductor of a glass plate of an automobile. A cable or the like is connected to such a connection terminal, and power is supplied to the conductor through the connection terminal.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication No. 2014-519149

Disclosure of Invention

Technical problem to be solved by the invention

The connection terminal as described above is fixed to the conductor via lead-free solder. However, since lead-free solder is harder than lead-containing solder, when the connection terminal is caught by something or a cable connected to the connection terminal is inadvertently pulled, stress may be concentrated on a connection portion between the connection terminal and the conductor, and a problem such as separation of the connection terminal may occur.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a glass plate assembly capable of suppressing failures such as peeling of connection terminals even when external force acts on the connection terminals.

Technical solution for solving technical problem

The glass panel assembly of the present invention comprises: a glass body; a conductor laminated on the glass body; at least 1 connection terminal fixed to the conductor and made of a conductive material; and a lead-free solder for fixing the connection terminal to the conductor, the connection terminal including: a base; at least 1 installation part connected with the base part and fixed on the conductor through the lead-free solder; a power supply unit connected to a cable for supplying power to the conductor; and a connecting portion disposed between the base portion and the power supply portion, and configured to flexibly connect the power supply portion to the base portion.

In the above glass panel assembly, the glass panel assembly may include a pair of the above arrangement portions.

In the glass panel assembly, the pair of installation portions may be disposed on opposite sides of the base portion.

In the glass panel assembly, the connecting portion may be configured to be more easily deformed than the base portion.

In the glass plate assembly, the connection portion may be formed of a copper-zinc alloy.

In the glass plate assembly, at least 1 convex portion may be formed on a surface of the installation portion facing the conductor with the lead-free solder interposed therebetween.

In the above glass panel assembly, the electric conductor may be formed of at least 1 heating wire.

In the above glass panel assembly, the conductor may be formed of at least 1 antenna.

In the glass plate assembly, the conductive body may be formed of at least 1 light adjuster or light emitter.

In the above glass panel assembly, the glass body may be formed of a laminated glass, and the laminated glass may include: an outer glass plate; an inner glass plate; and an interlayer film disposed between the outer glass plate and the inner glass plate.

In the glass panel assembly, the conductor may be disposed between the outer glass panel and the inner glass panel, a notch may be formed in an end edge of the inner glass panel, and the connection terminal may be fixed to the conductor exposed to the outside through the notch via the lead-free solder.

In the glass panel assembly, the outer glass panel may be formed of an unreinforced glass.

In the glass plate assembly, the conductor may be formed of printed silver.

In the above glass panel assembly, the lead-free solder may be an indium-based lead-free solder.

In the glass plate assembly, the lead-free solder may have a melting point of 150 ℃ or lower.

Effects of the invention

According to the glass plate assembly of the present invention, even when an external force acts on the connection terminals, it is possible to suppress troubles such as peeling of the connection terminals.

Drawings

FIG. 1 is a top view of a glass panel assembly according to one embodiment of the present invention.

Fig. 2 is a perspective view of a connection terminal used in the glass plate assembly of fig. 1.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a rear view of fig. 2.

Fig. 5 is a rear view showing a method of mounting the connection terminal shown in fig. 2 on a glass plate.

Fig. 6 is a rear view showing a state in which the connection terminal shown in fig. 2 is mounted on a glass plate.

Fig. 7 is a side view showing a state where a force is applied to the cable when the connection terminal shown in fig. 2 is mounted on a glass plate.

Fig. 8 is a rear view of fig. 7.

Fig. 9 is a perspective view showing another example of the connection terminal of the present invention.

Fig. 10 is a plan view showing another example of the connection terminal of the present invention.

Fig. 11 is a plan view showing another example of the connection terminal of the present invention.

Fig. 12A is a plan view showing another example of the connection terminal of the present invention.

Fig. 12B is a rear view of fig. 23A.

Fig. 13 is a plan view showing a state in which the connection terminal of the present invention is mounted on a laminated glass.

Fig. 14 is a plan view of a connection terminal of embodiment 1.

Fig. 15 is a plan view of a connection terminal of embodiment 2.

Fig. 16 is a plan view of a connection terminal of a comparative example.

Fig. 17 is a side view showing an experiment in which a load is applied to the cable in the connection terminals of examples 1 and 2.

Fig. 18 is a side view showing an experiment in which a load is applied to the cable with respect to the connection terminal of the comparative example.

Detailed Description

Hereinafter, an embodiment of a glass panel assembly according to the present invention will be described with reference to the drawings. Fig. 1 is a top view of the glass panel assembly. As shown in fig. 1, the glass panel assembly 10 is a component that is embedded in a window frame of an automobile. Specifically, the glass plate assembly 10 includes a glass plate 1, a defogger 2 (electric conductor) laminated on the glass plate 1, and a pair of connection terminals 3 attached to the defogger 2 via a lead-free solder 4. A power supply cable 5 extending from inside the vehicle is attached to each connection terminal 3, and the current supplied from the cable 5 is supplied to the defogger via the connection terminal 3. Hereinafter, each member will be explained.

< 1. glass plate >

As the glass plate 1, a known glass plate for an automobile can be used. For example, the glass panel 1 may also be made of heat absorbing glass, ordinary transparent glass or green insulating glass, or UV green insulating glass. However, such a glass plate 1 is required to achieve visible light transmittance in compliance with the safety standards of the countries where automobiles are used. For example, the solar radiation absorption rate, the visible light transmittance, and the like can be adjusted so as to satisfy safety standards. Hereinafter, an example of the composition of the transparent glass and an example of the composition of the heat absorbing glass are given.

(transparent glass)

SiO₂: 70 to 73 mass%

Al₂O₃: 0.6 to 2.4% by mass

CaO: 7 to 12% by mass

MgO: 1.0 to 4.5% by mass

R₂O: 13 to 15 mass% (R is an alkali metal)

Conversion to Fe₂O₃Total iron oxide (T-Fe) of₂O₃): 0.08 to 0.14% by mass

(Heat absorbing glass)

The composition of the heat absorbing glass can be converted into Fe based on the composition of the transparent glass₂O₃Total iron oxide (T-Fe) of₂O₃) In an amount of 0.4 to 1.3 mass%, to obtain CeO₂The ratio of (A) to (B) is 0 to 2 mass%, and TiO is added₂The ratio of (B) is 0 to 0.5 mass%, and the constituent component (mainly SiO) of the glass₂、Al₂O₃) Minus T-Fe₂O₃、CeO₂And TiO₂The amount of (a).

The kind of the glass plate 1 is not limited to the transparent glass or the heat absorbing glass, and can be appropriately selected according to the embodiment. For example, the glass plate 1 may be a resin window made of acrylic or polycarbonate.

The thickness of the glass plate 1 of the present embodiment is not particularly limited. However, from the viewpoint of weight reduction, the thickness of the glass plate 1 may be set to a range of 2.2 to 5.1mm, may be set to a range of 2.4 to 3.8mm, and may be set to a range of 2.7 to 3.2 mm. Further, the thickness of the glass plate 1 may be set to 3.1mm or less, 2.0mm or less, or even 1.6mm or less.

In addition, the glass plate 1 may be a laminated glass in which an interlayer film such as a resin is sandwiched between a plurality of glasses, in addition to a single glass plate. The thickness of each glass plate constituting the laminated glass is not particularly limited, and for example, one glass plate may be 1.6mm, and the other glass plate may be 2.0 mm. In addition, the thickness of the other glass plate can be set to 0.3 mm. As described above, the glass plate can be set appropriately within the range of 0.2 to 5.1 mm.

< 2. demister

Next, the demister 2 will be explained. As shown in fig. 1, the defogger 2 includes a pair of 1 st bus bar 21 and 2 nd bus bar 22 for power supply extending in the vertical direction along both side edges of the glass plate 1. A plurality of heater wires 23 extending in the horizontal direction are arranged in parallel with a predetermined interval between the two bus bars 21 and 22.

Then, a current is supplied from the connection terminal 3 attached to the 1 st bus bar 21, and the connection terminal attached to the 2 nd bus bar 22 is grounded via the cable 5. With this configuration, when current is supplied to the defogger 2, heat for fogging is generated in the heating wire 23. The bus bars 21 and 22 and the heater wire 23 are formed by printing conductive silver paste on the surface of the glass plate 1 and firing the paste, for example. However, the material constituting the defogger 2 is not limited to the silver paste, and can be appropriately selected.

< 3. connecting terminal

Next, the connection terminal 3 will be described with reference to fig. 2 and 3. Fig. 2 is a perspective view of the connection terminal to which the cable is connected, fig. 3 is a plan view of the connection terminal before the cable is connected, and fig. 4 is a rear view of the connection terminal. Hereinafter, for convenience of explanation, the description will be made in the direction shown in fig. 2 to 4.

As shown in fig. 2 to 4, the connection terminal 3 of the present embodiment includes a pair of installation portions 31, a base portion 32, a connection portion 33, and a power supply portion 34, which are integrally formed by bending a conductive material such as a plate-shaped metal, for example. The material forming the connection terminal 3 is not particularly limited as long as it is a conductive material, but a material having a high repeated flexural strength as described later is preferable, and for example, copper-zinc alloy, tough-gauge steel (C1100R), brass (C2600), and copper alloy (NB-109) are preferably used.

Each installation portion 31 is provided on the bus bars 21 and 22 of the demister 2 and is formed in a plate shape. Each of the installation portions 31 is formed in a rectangular shape as a whole, and the corner portions are formed in an arc shape. The lower surface of each installation portion 31 is fixed to the bus bars 21 and 22 via lead-free solder 4 described later. The installation portion 31 has a shape with bent corners, thereby suppressing stress concentration described later.

On the lower surface of each installation portion 31, 2 projections 311 are formed, and as will be described later, a gap is formed between the installation portion 31 and the bus bars 21 and 22 by these projections 311, and the lead-free solder 4 is disposed so as to fill the gap.

The 2 installation portions 31 are connected by the base portion 32. More specifically, the base portion 32 includes a pair of upright portions 321 that are upright from the rear end portions of the side edges of the respective installation portions 31, and a body portion 322 that extends in the horizontal direction so as to connect the two upright portions 321, and is formed in a U-shape as a whole in front view. The connection portion 33 extends forward from the front end of the main body portion 322, and a power supply portion 34 extending in a band shape in the left-right direction is connected to the front end of the connection portion 33.

The width of the connecting portion 33 in the left-right direction is smaller than that of the body portion 322. Further, in the body portion 322, at a connecting portion with the connecting portion 33, semicircular notches 323 are formed at positions corresponding to both ends of the connecting portion 33.

As shown in fig. 3 and 4, before the cable 5 is connected, the power supply unit 34 includes a rectangular support portion 341 connected to the connection unit 33 and a pair of extension portions 342 extending downward from both sides of the support portion 341. The width of the supporting portion 341 in the left-right direction is wider than the connecting portion 33. As shown in fig. 5, the power supply unit 34 is configured to surround the cable 5 with the support portion 341 and the pair of extending portions 342 and to press (wind) the cable 5, thereby fixing the cable 5.

< 4. solder >

The lead-free solder 4 is not particularly limited, and for example, indium type, zinc type, bismuth type, tin-silver type, and other lead-free solders can be used. In particular, since indium-based or lead-based lead-free solders are softer than, for example, tin-silver-based lead-free solders, breakage of the glass plate due to residual stress can be suppressed. In order to alleviate the stress concentration, it is preferable to use a soft lead-free solder such as indium having a melting point of 150 ℃.

< 5. mounting of connection terminal >

Next, a method of mounting the connection terminal 3 will be described with reference to fig. 5 and 6. First, as shown in fig. 5, the cable 5 is disposed between the two extending portions 342 of the power supply portion 34, and the two extending portions 342 are pressed to fix the cable 5 to the power supply portion 34. Thereby, the cable 5 is arranged below the base portion 32. The cable 5 is covered with a non-conductive member such as rubber except for a connection portion with the power supply portion 34. Next, lead-free solder 4 is applied to the lower surface of the installation portion 31.

Next, the connection terminal 3 prepared as described above is fixed to the bus bars 21 and 22. First, as shown in fig. 5, lead-free solder 4 is disposed on bus bars 21 and 22. Next, the upper surface side of the installation portion 31 of the connection terminal 3 is heated. Thereby, heat is conducted to the lead-free solder 4 through the setting portion 31, and the lead-free solder 4 is melted. Then, as shown in fig. 6, the installation portion 31 is fixed to the bus bars 21, 22 with the lead-free solder 4 being solidified.

< 6. feature >

As described above, according to the glass panel assembly 10 of the present embodiment, the following effects can be obtained.

(1) For example, as shown in fig. 7 and 8, when the cable 5 is rotated to apply a force so as to extend perpendicularly to the glass plate 1, stress concentrates on a part of the installation portion 31, and the installation portion 31 may be peeled off from the bus bars 21, 22, or the installation portion 31 may be peeled off together with the bus bars 21, 22 and the glass plate 1, whereby the connection terminal 3 may be detached from the bus bars 21, 22.

Therefore, in the present embodiment, the connecting portion 33 having a narrow width is provided between the power supply portion 34 and the base portion 32, so that the connecting portion 33 is bent with respect to the base portion 32 when the cable 5 is rotated together with the power supply portion 34. This suppresses the concentration of force in the installation portion 31, and as a result, the installation portion 31 can be prevented from being peeled off from the bus bars 21 and 22 and the glass plate 1.

Further, since the lead-free solder 4 having a low melting point such as indium is softer than, for example, tin-silver lead-free solder, when the above-described force acts, the force acting on the bus bars 21 and 22 from the installation portion 31 via the lead-free solder 4 can be relaxed, and the separation of the connection terminal 3 can be further suppressed. However, when the switch of the defogger is turned on by mistake at a high temperature such as a desert or a seaside in midsummer, the lead-free solder 4 having a low melting point may rise to a temperature close to the melting point, and the bonding force of the solder may be slightly reduced. On the other hand, tin-silver based lead-free solders are harder than indium based lead-free solders and have a lower stress relaxation effect, but have a higher melting point, and therefore do not cause the above-described reduction in bonding force when used at high temperatures.

(2) As shown in fig. 2 and 3, an arc-shaped notch 323 is formed in the base portion 32 at a connection portion with the connection portion 33. Thus, the length of the connecting portion 33 in the front-rear direction is substantially increased by the notch 323. Therefore, the connecting portion 33 is easily stressed and becomes more easily bent. As a result, concentration of force on the installation portion 31 is further suppressed, and as a result, the installation portion 31 can be further prevented from being peeled off from the bus bars 21 and 22 and the glass plate 1.

(3) In the connection terminal 3 of the present embodiment, the rising portion 321 is provided in the base portion 32, and thus a gap can be formed between the body portion 322 of the base portion 32 and the installation portion 31. Therefore, power feeding unit 34 can be disposed in the gap, and cable 5 can be disposed below main body 322. Therefore, the height of the connection terminal 3 protruding from the glass plate 1 can be suppressed, and the connection terminal 3 can be suppressed from coming into contact with an operator, a work tool, or the like. Further, since the power supply portion 34 does not protrude from the upper surface of the base portion 32, the connection terminal 3 can be made compact.

(4) A pair of installation portions 31 are disposed on both sides of the power supply portion 34 so as to sandwich the power supply portion 34 from the left and right. Therefore, the force (particularly, a rotational moment described later) acting on the power feeding portion 34 can be dispersed to the left and right, and the force acting on each of the installation portions 31 can be weakened.

(5) Since convex portion 311 is formed on the lower surface of installation portion 31, a gap can be formed between installation portion 31 and bus bars 21 and 22 by convex portion 311. Further, since the lead-free solder 4 is disposed in the gap, the thickness of the lead-free solder 4 can be made uniform. Therefore, the bonding strength in the plane of the installation portion 31 can be made uniform.

< 7. modification

While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist thereof. Also, a plurality of modifications given below can be appropriately combined.

＜1＞

In the above embodiment, the width of the connecting portion 33 is made narrower than the main body portion 322 of the base portion 32, and the notch 323 is formed, so that the length of the connecting portion 33 in the front-rear direction is substantially increased and the connecting portion 33 is easily bent. For example, a configuration can be adopted in which: the connecting portion 33 is made thinner than the base portion 32, or is formed with an easily bendable portion in advance, or is made of a material that is softer than the base portion 32, so that the connecting portion is more easily deformed than the base portion 32 to be easily bent.

＜2＞

In the above embodiment, the connection terminal 3 is formed integrally from one material, but may be formed from a plurality of materials. As described above, only the connection portion 33 may be formed of a different material.

＜3＞

In the above embodiment, 2 installation portions 31 are provided, and for example, 1 installation portion may be provided as shown in fig. 9. The shape of the base portion 32 is not particularly limited, and may be any shape as long as the installation portion 31 and the connection portion 33 can be connected to each other. The power supply portion 34 is provided below the main body portion 322 of the base portion 32 when the cable 5 is pressed, but may be disposed above the main body portion 322. The shape of the installation portion 31 is not particularly limited, and may be, for example, a rectangular shape as shown in fig. 10. Thus, for example, the area to which the lead-free solder 4 is applied can be increased as compared with the example of fig. 3, and therefore, the bonding strength can be improved. In particular, the indium-based solder is advantageous because the bonding strength at high temperature (for example, 105 to 120 ℃ C.) is not so strong. Further, the convex portion 311 is not necessarily provided. When 2 installation parts 31 are provided, they may not be provided with the base part 32 as in the above embodiment, and the positions of the 2 installation parts 31 with respect to the base part 32 are not particularly limited.

＜4＞

The length of the connecting portion 33 is not particularly limited, and may extend forward beyond the installation portion 31 as shown in fig. 11, for example. Thus, the power supply portion 34 is disposed forward of the installation portion 31. When the connecting portion 33 is lengthened in this way, the connecting portion 33 is easily bent, and when the cable 5 rotates together with the power supply portion 34 as shown in fig. 7, concentration of force in the installation portion 31 can be further suppressed. On the other hand, by adjusting the longitudinal lengths of the connection portion 33, the installation portion 31, and the power supply portion 34, the longitudinal position of the power supply portion 34 can be changed. For example, although the front end of the power feeding portion 34 substantially coincides with the front end of the installation portion 331 in the example of fig. 3, the power feeding portion 34 may be arranged behind the front end of the installation portion 31 as shown in fig. 12A. The notch 323 is not necessarily required, and may be omitted as shown in fig. 12A, for example. However, in this case, in order to make the connection portion 33 easily bendable, it is preferable to reduce the width of the connection portion 33.

＜5＞

In the above embodiment, the rising portion 321 is provided so as to be substantially perpendicular to the installation portion 31 and the base portion 32, as shown in fig. 4, for example, but the present invention is not limited thereto. For example, as shown in fig. 12B, the rising portion 321 may extend obliquely with respect to the installation portion 31 and the base portion 32. In this example, the rising portion 321 is formed to extend downward as it goes to the installation portion 31 side. Thus, when a force acts on the power supply portion 34, the force transmitted to the installation portion 31 can be reduced by the rising portion 321 extending obliquely.

＜6＞

The power feeding unit 34 fixes the cable 5 by pressing, but the structure is not particularly limited as long as the cable 5 can be fixed, and various fixing methods can be applied. For example, a connector may be attached to the tip of the cable 5, and the connector may be fitted into the power supply unit 34, or the cable 5 and the power supply unit 34 may be fixed by solder or a conductive adhesive. Further, when the protruding height of the connection terminal 3 from the glass plate 1 is not limited, the cable 5 can also be fixed on the upper surface side of the connection portion 33.

＜7＞

In the above embodiment, the connection terminal 3 is fixed to the defogger 2, but the present invention can be applied to an electric device other than the defogger as long as the electric device is supplied with electric current. For example, the heating wire or the antenna may be other than the bus bar.

＜8＞

In the above embodiment, the example in which the conductor (bus bar and heater wire) is provided on the glass plate 1 has been described, but for example, the conductor may be provided on the laminated glass, and the connection terminal 3 may be provided thereon. The laminated glass can have a known structure including an outer glass plate, an inner glass plate, and a resin interlayer disposed therebetween. Further, a conductor such as a heater wire, an antenna, a light adjuster, and a light emitter may be disposed on the surface of the inner glass plate on the vehicle interior side, and the connection terminal may be fixed to the conductor by a lead-free solder. As the conductor, for example, a heater wire provided in an arrangement area of the sensor or the camera can be used. Alternatively, as shown in fig. 10, the various conductors 25 described above may be disposed between the two glass plates 11, 12, and the conductors 25 may be exposed from the notches 121 formed in the inner glass plate 12. Further, the connection terminal 3 can be fixed to the exposed conductor 25 by the lead-free solder 4. In this case, the outer glass plate 11 can be formed of an unreinforced glass. As the electric conductor disposed between the two glass plates 11 and 12, a deicing device can be used. In this case, the deicing equipment can be disposed on the vehicle interior side surface of the outer glass panel 11.

＜9＞

Further, it is also possible to apply flux to the conductor and fix the connection terminal 3 thereon via the lead-free solder 4. In this case, for example, Gamma Lux (manufactured by Kimura Metal industries, Ltd.) may be used as the flux.

Examples

Hereinafter, examples of the present invention will be described. However, the present invention is not limited to the following examples.

< 1. preparation of examples and comparative examples >

As example 1, a connection terminal was produced in the same manner as in the above embodiment. Specifically, the connection terminal shown in fig. 14 was manufactured. The material is copper-zinc alloy, and the size is shown in figure 14 (unit is mm). Embodiment 2 as shown in fig. 15, the structure of the connecting portion is different from that of embodiment 1. That is, the base portion is not provided with a notch, but is formed so that both sides of the connecting portion are depressed in an arc shape. On the other hand, a connection terminal shown in fig. 16 was produced as a comparative example. In the comparative example, the connection part was not provided, and the base part was directly connected to the power supply part.

Then, the cables were pressed at the power supply portions of examples 1 and 2 and comparative example, which were configured as described above, and then each of the installation portions was fixed to a conductor (made of Ag) laminated on a glass plate (non-strengthened glass plate: thickness: 2.0mm) by using an indium-based lead-free solder. Then, as shown in fig. 17 or 18, the connection terminals were disposed so as to face downward, and after a load was applied to the cable in a direction perpendicular to the glass plate, the examples 1 and 2 and the comparative example were stored in a storage room at a temperature of 105 ℃ for 96 hours. After that, whether or not the connection terminal was peeled off from the conductor was observed. The load is two of 5N and 10N. The results are as follows.

TABLE 1

	5N	10N
			Example 1	Without peeling off	Without peeling off
Example 2	Without peeling off	Without peeling off
			Comparative example	Peeling off	Peeling off

As shown in table 1, the connection terminals of examples 1 and 2 were not peeled from the conductor, whereas the connection terminals of comparative example were peeled from the conductor. Since the connection terminals of examples 1 and 2 have the connection portion, when a load perpendicular to the glass plate is applied to the cable, the connection portion is bent as shown in fig. 17. Therefore, the action of the rotation moment caused by the load acting on the cable on the installation portion of the connection terminal is alleviated, thereby preventing the separation of the connection terminal. On the other hand, since the connection terminal of the comparative example has no connection portion, when a load perpendicular to the glass plate is applied to the cable, as shown in fig. 18, a rotational moment by the cable strongly acts on the installation portion, and the installation portion is peeled off from the conductor. Therefore, it was found that the connection terminal can be prevented from peeling off by providing the connection portion between the base portion and the power supply portion.

Description of the reference numerals

1: glass plate

2: demister (conducting layer)

3: connecting terminal

4: lead-free solder

5: cable with a protective layer

10: glass panel assembly

31: setting part

32: base part

33: connecting part

34: a power supply unit.