JP3064033B2 - Thermometric battery checker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature-indicating battery checker which prevents deterioration of the conductive performance of a conductive layer due to bending, stabilizes the conductive property, and enables accurate color display without unevenness.

[0002]

2. Description of the Related Art Conventionally, as a thermoelectric battery checker, there is a strip-shaped paper or plastic film in which a picture layer and a thermochromic ink layer are provided on one side and a conductive layer is formed on the other side. Was. The conductive layer is formed of a conductive paste such as silver or carbon, or a metal deposited film. In this thermophilic battery checker, a voltage is applied to the conductive layer to generate heat, and the thermophilic ink layer performs color display according to a temperature change of the conductive layer.

[0003] The thermoelectric battery checker has both ends of the thermoelectric battery checker as input and output terminals, and the terminals are manually pressed against the electrodes of the dry battery to make contact therewith. It is. Therefore, when packaging the thermostatic battery checker with the dry battery, the thermostatic battery checker is provided with a bent portion, folded and compacted, and packaged together with the dry battery as an inconspicuous fixture.

[0004] In order to provide the bent portion of the thermometric battery checker, the entire thermometric battery checker is wrapped around a hard metal plate having square edges, and a pad is strongly pressed in contact with the edges. In addition, a processing method has been adopted in which a bent portion is provided by making a trace on the end of the thermostatic battery checker.

[0005]

However, the conductive layer is
It is formed of a conductive paste such as silver or carbon or a metal deposited film, and is brittle. Therefore,
The conductive layer was rubbed against the corners of the metal plate during the bending process, and the portion was damaged and cracks and breaks were likely to occur.
Also, when folded during storage, a load is applied to the bent portion of the conductive layer, and deterioration has progressed. As a result, the conductivity of the conductive layer becomes partially unstable, and the conventional temperature-indicating battery checker does not generate heat at a constant temperature. No voltage was shown.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has a conductive film formed on one surface of a base film, and a picture layer and a thermosensitive ink layer on the other surface. Was formed, and in the thermoelectric battery checker having the bent portion, the conductive layer in the bent portion was configured to be covered with the protective layer. Further, the conductive layer may be a deposition film. Further, the conductive layer may be covered with a protective layer formed except for a pair of terminal portions. Further, the temperature-indicating ink layer may be formed in a portion other than the bent portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a thermostatic battery checker according to the present invention. The conductive layer 2 is formed on one surface of the base film 1, the picture layer 3 and the thermosensitive ink layer 4 are formed on the other surface, and the protective layer 5 is formed on the bent portion 6 of the conductive layer 2.
Is provided.

The base film 1 is a film or sheet, and has a thickness within a range that does not cause a problem in thermal conductivity. When the heat generated in the conductive layer 2 is strong, a substrate film 1 having heat resistance is suitable. Materials having such properties include polyester resins, polyamide resins, acrylic resins, and vinyl chloride resins.

A conductive layer 2 is formed on one surface of a base film 1 and a protective layer 5 is formed thereon.
reference).

The conductive layer 2 has a function of a terminal for inputting / outputting a current and a function of a heating element for generating resistance heat by passing a current. The conductive layer 2 is made of a conductive metal, metal compound, carbon, or the like. Specifically, a conductive paste film, a conductive ink film, a conductive coating film, a deposited thin film, an ion plating film, a sputtering There are a film and a plating film.

The conductive layer 2 may be formed on the entire surface of the base film 1. Alternatively, the conductive layer 2 may include at least a pair of terminal portions 21 and a heat generating portion connecting the terminals without disconnection.
It may have a constant pattern shape having the pattern 22 (see FIG. 3).

The heat generating portion 22 may have a pattern shape. For example, there is a tapered shape in which the width gradually decreases from one terminal portion 21 to the other terminal portion 21. With such a shape, the amount of heat generated by the heat generating portion 22 varies depending on the location, so that the color developing area of the thermochromic ink layer 4 gradually decreases, and various forms of color display can be realized. The terminal portions 21, 21 may have a pattern shape.

The conductive layer 2 is patterned by an etching method,
There are various methods such as a photoresist method, a masking method, and a method of washing away unnecessary portions using a water-soluble resin.

The protective layer 5 which is a feature of the present invention is a layer for protecting the conductive layer 2 from bending of the thermostatic battery checker, and is provided on the conductive layer 2 in the bent portion 6. Therefore, the protective layer 5 having a breakage resistance, flexibility, cushioning property, slip property and the like is effective against the deterioration of the conductive layer 2.

The protective layer 5 may be formed on the entire surface of the conductive layer 2 except for the portions that become the pair of terminal portions 21 (see FIGS. 1 and 3). By doing so, the exposed portion of the conductive layer 2 can be reduced, and the conductive layer 2 can be effectively protected.

Further, it is more effective that the protective layer 5 is formed so as to cover the bent portion 6 of the conductive layer 2 and the portion where the conductive layer 2 is patterned and thinned.

As a material constituting the protective layer 5, there is a usual elastic resin such as a vinyl chloride resin and a vinyl butyral resin. When the conductive layer 2 is patterned on the base film 1, the protective layer 5 is
It is preferable to have good adhesion to both the conductive layer 2 and the conductive layer 2. In this case, urethane-based resins, vinyl-based resins, urethane-vinyl-based resins, polyester-based resins, and the like are particularly preferable. By doing so, the conductive layer 2 is reliably sandwiched between the protective layer 5 and the base film 1, so that the floating and peeling of the conductive layer 2 can be prevented.

Further, in order to prevent the conductive layer 2 from being adversely affected at the time of bending, it is preferable that the protective layer 5 be hardly damaged and bend easily. in this case,
It is effective to mix polyethylene wax, carnauba wax, paraffin wax and the like in the protective layer 5 to impart slip properties. Various methods such as thermal curing, electron beam / ultraviolet curing, and solvent drying may be used for drying the protective layer 5. The composition having such a configuration is formed by a printing method, a coating method, or the like.

On the surface of the base film 1 opposite to the surface on which the conductive layer 2 and the protective layer 5 are formed, the picture layer 3 and the thermosensitive ink layer 4
Is formed (see FIGS. 1 and 2).

The picture layer 3 may be formed as characters or symbols for an appropriate purpose such as explanation of how to read the color of the thermochromic ink layer 4, or as a color pattern or a pattern for providing design. It may be formed. The picture layer 3 is usually provided by a forming method such as a printing method or a coating method using a coloring ink or the like.

The temperature-indicating ink layer 4 senses a change in temperature due to heat generation of the conductive layer 2 through the base film 1 and uses a composition which generates color according to each temperature, and is formed by a printing method or a coating method. Is formed.

In addition, the thermosensitive ink layer 4 has a bent portion 6 formed when the thermostatic battery checker is stored or used.
Is preferably formed in a portion excluding. In the bent portion 6, the thermosensitive ink layer 4 and the conductive layer 2 are inevitably stretched, so that the thickness is reduced or a crack is formed. Therefore, there is an inconvenience such that the coloring of the temperature indicating ink layer 4 does not match between the bent portion 6 and the portion other than the bent portion 6.

As a material for forming the thermochromic ink layer 4, for example, a thermochromic pigment or an ink containing a thermochromic liquid crystal can be used. Specifically, a reversible thermochromic pigment, an irreversible thermochromic pigment, a thermochromic pigment composition containing one or more chiral nematic liquid crystals, and a thermochromic ink composition or a thermochromic paint composition that causes a color change phenomenon in a target temperature range. Good to use. In addition, a substance exhibiting various effects may be contained as needed.

[0024] Illustrative and a thickness of 20μm polyester film substrate film of the portion where the vapor-deposited aluminum layer having a thickness of 800Å on one surface thereof is provided as a conductive layer, corresponding to the bent portion of the conductive layer,
The protective layer was provided with a coloring ink made of urethane vinyl resin. A pattern layer is formed by printing on the other surface of the base film, and a thermochromic, a thermochromic ink layer composed of a reversible thermoelectric material-containing ink composed of a chiral nematic liquid crystal corresponds to a heating portion of the aluminum vapor-deposited layer. The coating was dried on the part to be coated. When the bent portion of the thermostatic battery checker was bent, no failure such as destruction or floating of the aluminum vapor-deposited layer occurred. The resistance value between the terminal portions before bending was 4 to 5Ω and the resistance value after bending was 6 to 7Ω. Regarding the color development of the thermosensitive ink layer, a desired color development was obtained irrespective of the bent portion.

The crack occurs in Doing bending aluminum evaporation layer thermochromic battery checker that no protective layer the same configuration as Comparative Example above examples. Then, the resistance value between the terminal portions before bending was 4 to 5Ω, whereas the resistance value after bending was ΔΩ. The coloring of the temperature indicating ink layer was uneven at the bent portion, and a desired coloring was not obtained.

[0026]

According to the thermoelectric battery checker of the present invention, a conductive layer is formed on one surface of a base film, and a picture layer and a thermosensitive ink layer are formed on the other surface. In the battery checker, the conductive layer in the bent portion was configured to be covered by the protective layer.

Therefore, even if the thermoelectric battery checker is bent, the surface of the conductive layer is covered with the protective layer, so that the protective layer protects the conductive layer and prevents deterioration such as breakage and scratches, thereby improving the conductivity of the conductive layer. Stable and uniform color display without unevenness can be obtained, and accurate voltage display can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a thermostatic battery checker according to the present invention.

FIG. 2 is a front view showing one surface of the embodiment of the present invention.

FIG. 3 is a front view showing the other surface of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base film 2 Conductive layer 21 Terminal part 22 Heating part 3 Picture layer 4 Thermophilic ink layer 5 Protective layer 51 Opening 6 Bent part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-303783 (JP, A) JP-A 63-81269 (JP, U) JP-A 63-115773 (JP, U) JP-A 63-81773 193376 (JP, U) Hira 4-85272 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01R 31/36

Claims (4)

(57) [Claims] An electroconductive layer is formed on one side of a base film, and a picture layer and a thermosensitive ink layer are formed on the other side,
In a thermostatic battery checker having a bent part,
A thermostatic battery checker, wherein a conductive layer in a bent portion is covered with a protective layer. 2. The thermoelectric battery checker according to claim 1, wherein the conductive layer is a vapor-deposited film. 3. The thermostatic battery checker according to claim 1, wherein the conductive layer is covered with a protective layer formed except for a pair of terminal portions. 4. The thermostatic battery checker according to claim 1, wherein the thermogenic ink layer is formed at a portion other than the bent portion.