Luminous adhesive decoration for timekeeping components

Abstract

To provide luminescent adhesive decorations. [Solution] The present invention relates to a luminescent adhesive (1) for a timekeeping component, comprising: a first layer (10) made of an adhesive material; a second intermediate layer (11) containing a binder and containing 10 to 80% by weight of a fluorescent pigment that emits light in the UVA spectrum; and a third layer (12) that is semitransparent to ultraviolet light, contains a binder and contains 10 to 50% by weight of a fluorescent pigment that emits light in the visible spectrum.

Description

[Technical Field]

[0001] The present invention relates to luminescent adhesive decorations for timekeeping components. [Background technology]

[0002] It is well known that decorative elements are added to one side of the dial of a timepiece in order to form a symbol that indicates time.

[0003] One primary technique for manufacturing such a soundboard involves fixing decorative elements, usually appliqués, each of which has at least one foot that fits into a hole formed in the soundboard. However, this technique has the challenge of requiring the creation and handling of a large number of very small parts, which necessitates skilled workers and increases manufacturing costs.

[0004] Another traditional technique for securing decorative elements with a flat base surface involves using a liquid or semi-liquid adhesive to bond the decorative element through its base surface to a recess formed in the thickness of the surface plate at a predetermined location. While this method is less expensive than the above technique, it has many drawbacks.

[0005] In fact, the first challenge is that the small size of the decorative elements makes it difficult to automate the bonding process. Each decorative element must be bonded manually, which significantly increases the manufacturing cost of the soundboard.

[0006] The second challenge is the difficulty in accurately measuring the amount of adhesive to deposit in each recess in order to achieve satisfactory adhesion. [Overview of the project] [Problems that the invention aims to solve]

[0007] The present invention aims to solve the above-mentioned problems and other problems by providing a luminescent adhesive decoration. [Means for solving the problem]

[0008] For this purpose, the present invention relates to a luminescent adhesive for timekeeping components, - A first layer made of adhesive material, - A second intermediate layer containing a binder and 10-80% by weight of a fluorescent pigment that emits light in the UVA spectrum, - A third layer containing a binder and containing 10-50% by weight of a fluorescent pigment that emits light in the visible spectrum. Includes.

[0009] Other preferred variant forms of the present invention have the following characteristics: - The third layer is semi-transparent to ultraviolet light. - The first layer is epoxy, acrylic, polyurethane, or rubber solvent. - The fluorescent pigment that emits light in the UVA spectrum has an emission peak at a wavelength of 300-400 nm. - The thickness of the first layer is 20 to 200 μm. - The thickness of the second layer is 50 to 500 μm. - The thickness of the third layer is 50 to 500 μm. - The fluorescent pigment that emits light in the visible spectrum is europium (Eu 2+ ) or dysprosium (Dy 3+ This is strontium aluminate (SrAl2O4) with added ). - The fluorescent pigment that emits light in the UVA spectrum is LiScGeO4:Bi 3+ LiYGeO4:Bi 3+ Sr2MgGe2O7:Pb 2+ NaLuGeO4:Bi 3+ , or CaMgGeO4:Bi 3+ It is a compound like this. - The thickness of the second layer is greater than the thickness of the third layer. - The binders of the second layer and the third layer are made of polyvinyl chloride or polyurethane.

[0010] Other features and advantages of the present invention will become apparent by reading the following detailed description given as an example while referring to the accompanying drawings.

Brief Description of the Drawings

[0011] [Figure 1] A schematic cross-sectional view of the adhesive body according to the present invention is shown.

Embodiments for Carrying Out the Invention

[0012] The light-emitting adhesive 1 for a timepiece component according to the present invention includes a first layer 10 made of an adhesive material, a second layer 11 which is an intermediate layer containing a binder and containing 10 to 80% by weight of a fluorescent pigment that emits light in the UVA spectrum, and a third layer 12 containing a binder and containing 10 to 50% by weight of a fluorescent pigment that emits light in the visible spectrum.

[0013] The adhesive material used for the first layer is an adhesive material that can relocate the adhesive body as needed. Preferably, the adhesive material of the first layer is selected from epoxy, acrylic, polyurethane, or a rubber solvent.

[0014] The thickness of the first layer is 20 to 200 μm, preferably 20 to 50 μm.

[0015] The second layer 11 of the adhesive body contains a fluorescent pigment that emits light in the UVA spectrum. This pigment has an emission peak at a wavelength of 300 to 400 nm.

[0016] The thickness of the second layer is 50 to 500 μm, preferably 200 to 300 μm. The second layer must be thick enough to be sufficiently opaque and reflective so that it emits light from the pigment towards the third layer.

[0017] Preferably, the fluorescent pigment that emits light in the UVA spectrum used in the second layer is LiScGeO4:Bi 3+ , LiYGeO4:Bi 3+ , Sr2MgGe2O7:Pb 2+ , NaLuGeO4:Bi 3+ , or a compound such as CaMgGeO4:Bi 3+ .

[0018] The binders used in the second layer 11 and the third layer 12 are made of polyvinyl chloride or polyurethane.

[0019] The thickness of the third layer is 50 to 500 μm, preferably 150 to 250 μm.

[0020] Advantageously, the thickness of the third layer is thinner than that of the second layer so as to achieve sufficient light transmittance for the ultraviolet light to reach the second layer 11.

[0021] The fluorescent pigment that emits light in the visible spectrum used in the third layer contains a strontium aluminate family (Sr 2+ ) or dysprosium (Dy 3+ ) added to (Al x O y ). z )

[0022] By various aspects of the present invention as described above, a light-emitting adhesive that can emit light over a longer period is provided.

[0023] Naturally, the present invention is not limited to the illustrated examples, and various variations and modifications that will be apparent to those skilled in the art are possible without departing from the scope of the invention as defined by the claims. [Explanation of Symbols]

[0024] 1 Adhesive 10. The first layer 11. Second Layer 12. The third layer

Claims

1. A luminescent adhesive (1) for a timekeeping component, A first layer (10) made of adhesive material, A second intermediate layer (11) containing a binder and containing 10 to 80% by weight of a fluorescent pigment that emits light in the UVA spectrum, A third layer (12) containing a binder and containing 10 to 50% by weight of a fluorescent pigment that emits light in the visible spectrum A luminescent adhesive (1) containing the above.

2. The third layer (12) is semi-transparent to ultraviolet light. The adhesive (1) according to claim 1.

3. The first layer (10) is an epoxy, acrylic, polyurethane, or rubber solvent. The adhesive (1) according to claim 1.

4. The fluorescent pigment that emits light in the UVA spectrum has an emission peak at a wavelength of 300 to 400 nm. The adhesive (1) according to claim 1.

5. The thickness of the first layer (10) is 20 to 200 μm. The adhesive (1) according to claim 1.

6. The thickness of the second layer (11) is 50 to 500 μm. The adhesive (1) according to claim 1.

7. The thickness of the third layer (12) is 50 to 500 μm. The adhesive (1) according to claim 1.

8. The fluorescent pigment that emits light in the visible spectrum is europium (Eu 2+ ) or dysprosium (Dy 3+ Strontium aluminate (SrAl) with added ) 2 O 4 ) The adhesive (1) according to claim 1.

9. The fluorescent pigment that emits light in the UVA spectrum is LiScGeO 4 :Bi 3+ 、LiYGeO 4 :Bi 3+ 、Sr 2 MgGe 2 O 7 :Pb 2+ 、NaLuGeO 4 :Bi 3+ 、or a compound such as CaMgGeO 4 :Bi 3+ ​ The adhesive (1) according to claim 1.

10. The thickness of the second layer (11) is greater than the thickness of the third layer (12). The adhesive (1) according to claim 1.

11. The binders of the second layer (11) and the third layer (12) are made of polyvinyl chloride or polyurethane. The adhesive (1) according to claim 1.

Images