CN105313318B - 植字固定方法、显示板以及钟表 - Google Patents

植字固定方法、显示板以及钟表 Download PDF

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Publication number
CN105313318B
CN105313318B CN201510363456.9A CN201510363456A CN105313318B CN 105313318 B CN105313318 B CN 105313318B CN 201510363456 A CN201510363456 A CN 201510363456A CN 105313318 B CN105313318 B CN 105313318B
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China
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mentioned
set types
laser
printing component
hornbook
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CN201510363456.9A
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CN105313318A (zh
Inventor
井上宪
井上宪一
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Casio Computer Co Ltd
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Casio Computer Co Ltd
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/10—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial
    • G04B19/103—Ornamental shape of the graduations or the surface of the dial; Attachment of the graduations to the dial attached or inlaid numbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1609—Visible light radiation, e.g. by visible light lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/733—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7336—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light
    • B29C66/73361—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light at least one of the parts to be joined being opaque to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/733—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
    • B29C66/7336—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light
    • B29C66/73365—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being opaque, transparent or translucent to visible light at least one of the parts to be joined being transparent or translucent to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/90—Measuring or controlling the joining process
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
    • G01D13/02—Scales; Dials
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Abstract

本发明提供一种植字固定方法、显示板以及钟表。该植字固定方法具有以下工序：在由透明或半透明的树脂形成的文字板的表面配置由不透明或半透明的具有激光吸收特性的树脂形成的植字部件的工序；利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光的工序；以及，使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件的工序。

Description

植字固定方法、显示板以及钟表
技术领域
本发明涉及植字固定方法、显示板以及钟表。
背景技术
在用于钟表的文字板上，配置有表示时刻等的数字或文字以及取代它们的标识(所谓时刻表示字符)或各种刻度、记号等。
这些时刻表示字符等有的通过印刷平面形成，但是为了实现具有高级感的成品效果，优选立体地进行展现。因此，广泛进行的是采用所谓“植字”方法，即植字部件作为其他部件来形成，将其配置在文字板上并固定。
以往，植字部件一般由金属材料形成，植字部件的固定多采用机械性铆接、粘接固定。
即，例如在植字部件的背面侧设置脚部，并且在由金属材料或树脂材料形成的文字板上设置使该脚部插通的孔，将植字部件配置在文字板上之后，在文字板的背面侧将脚部以机械性铆接或者利用粘接剂粘接等来固定。
关于这一点，由于近期的成形模具技术的进化，作为精密零件的植字部件也能由树脂材料来形成。
在文字板及植字部件均由树脂材料形成的情况下，能够使用使树脂彼此接合的各种方法将植字部件固定在文字板上。
作为树脂彼此的接合方法，可列举通过粘接剂固定、热压接、超声波接合等。
但是，利用粘接剂固定精密零件耗费时间和劳力，另外，还存在由于粘接剂的溢出等导致成品不完美的情况。
于是，在日本特开2001-198982号公报中，公开了使用激光熔敷技术将树脂彼此熔敷的方法。
但是，植字部件是配置到文字板上的精密零件，并且在钟表的文字板上，由于热导致的变形、发黑、发暗等，即便是细微损伤也很明显，制品质量下降。
关于这一点，上述的现有方法不能实现细微的热控制，难以进行精密零件在细小区域内的稳定熔敷，特别是，存在难以进行像钟表中植字部件那样强烈要求排除热对外观影响的零件的熔敷的问题。
发明内容
本发明鉴于以上情况，目的在于提供一种能够在树脂制的文字板上精密固定作为树脂制的精密零件的植字部件的植字固定方法、显示板以及钟表。
为了实现上述目的，本发明的一个方案是一种植字固定方法，其特征在于，具有：
在由透明或半透明的树脂形成的文字板的表面配置由不透明或半透明的具有激光吸收特性的树脂形成的植字部件的工序；
利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光的工序；以及，
使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件的工序。
为了实现上述目的，本发明的一个方案是一种显示板，其特征在于，具备：
由透明或半透明的树脂形成的文字板；以及
配置在上述文字板的表面且由不透明或半透明的具有激光吸收特性的树脂形成的植字部件，
利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光，从而使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件。
为了实现上述目的，本发明的一个方案是一种钟表，其特征在于，
具备显示板，该显示板具备：
由透明或半透明的树脂形成的文字板；以及
配置在上述文字板的表面且由不透明或半透明的具有激光吸收特性的树脂形成的植字部件，并且
利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光，从而使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件。
附图说明
图1是本实施方式中的显示板的俯视图。
图2A是植字部件及其周边的文字板的放大图，图2B是从图2A中的箭头b方向看到的植字部件的主视图，图2C是从图2A中的箭头c方向看到的植字部件的侧视图。
图3A是植字部件的一个变形例及其周边的文字板的放大图，图3B是从图3A中的箭头b方向看到的植字部件的主视图。
图4A是植字部件的一个变形例及其周边的文字板的放大图，图4B是从图4A中的箭头b方向看到的植字部件的主视图。
图5A是植字部件的一个变形例及其周边的文字板的放大图，图5B是从图5A中的箭头b方向看到的植字部件的主视图。
图6是用于说明本实施方式中的植字固定方法的主要部位剖视图。
图7A及图7B是表示激光的光束形状的一个例子的图，图7A是光束的俯视图，图7B是图7A的光束的立体图。
图8A及图8B是表示激光的光束形状的一个例子的图，图8A是光束的俯视图，图8B是图8A的光束的立体图。
图9A～图9C是用于说明本实施方式中的植字固定方法的一个变形例的主要部位剖视图。
图10A及图10B是本实施方式中的植字部件的一个变形例的主要部位剖视图。
具体实施方式
参照图1至图8B，针对本发明的植字固定方法、显示板以及钟表的一个实施方式进行说明。
此外，在以下叙述的实施方式中，为了实施本发明附加了技术上优选的各种限定，但是本发明的范围不限定于以下的实施方式及图示例。
图1是本实施方式中的钟表的显示板的俯视图。
如图1所示，本实施方式的显示板具备文字板1和植字部件2。
在本实施方式中，文字板1由透明或半透明的树脂形成。
形成文字板1的材料具体为例如丙烯酸树脂(甲基丙烯酸树脂；聚甲基丙烯酸、聚甲基丙烯酸甲酯等PMMA)或聚碳酸酯树脂(PC)等，优选光的透射率为20％以上。
另外，植字部件2配置在文字板1的表面，例如由指针3指示，包括使表示时刻等的数字或文字及取代它们的标识(所谓时刻表示字符)等立体展现的时刻表示字符用的植字部件2a、使显示各种信息的小显示部4的周围等所设的环或刻度、记号等立体展现的装饰用的植字部件2b等。
植字部件2由不透明或半透明的具有激光吸收特性的树脂形成。
形成植字部件2的材料具体优选例如聚碳酸酯树脂(PC)或ABS树脂等耐热性比较优异并且吸收可视光的不透明的材料，光的透射率优选为20％以下。
图2A是图1所示植字部件及其周边的文字板的放大图，图2B是从图2A中的箭头b方向看到的植字部件的主视图，图2C是从图2A中的箭头c方向看到的植字部件的侧视图。
另外，图3A、图4A及图5A是植字部件的一个变形例及其周边的文字板的放大图，图3B、图4B及图5B是从图3A、图4A及图5A中的箭头b方向观察各自的植字部件的情况下的植字部件主视图。
如图2A至图2C所示，植字部件2包括主体部21、设在主体部21的背面侧的脚部22。
此外，脚部22的形状、数量不限于图示例。
另外，不一定必须具备脚部22，可以为不具有脚部22的结构。
在植字部件2具备脚部22的情况下，在文字板1设有用于脚部22嵌入的孔。
此外，孔可以是贯通孔，也可以是不贯通的凹部。
通过在植字部件2侧设置脚部22，在文字板1侧设置用于其嵌入的孔，从而植字部件2容易定位。
另外，在本实施方式中的植字部件2a的上表面沿着长度方向设有顶线23，植字部件2a在主视图中大致为山型(参照图2B)。
此处，顶线23是指表面彼此相交从而高于其他部分的部分。
此外，在本实施方式中，除了图2B等所示斜面彼此相交的部分之外，例如图3B、图4B所示那样，斜面和平面相交部分也作为顶线23。
此外，如图5A及图5B所示，在存在高于其他部分的点的情况下，该“点”作为顶点24。
图6是用于说明本实施方式中的植字固定方法的主要部位剖视图，表示用于实现本实施方式中的显示板的装置的结构概略。
用于实现本实施方式中的植字固定方法的装置具体如图1所示具备：支撑文字板1及植字部件2的支撑部件51；对文字板1及植字部件2加压的加压部件52；以及使由加压部件52施加的压力均匀化的压力均匀化夹具53。
压力均匀化夹具53需要使激光L透射并且能够耐受激光熔敷时产生的热，例如可适用平板状的透明耐热玻璃。
通过经由压力均匀化夹具53加压，能够对文字板1及植字部件以面进行加压，能够在对植字部件2施加均匀压力的同时进行激光熔敷。
此处，均匀压力优选为均匀率80％以上的压力，输出优选为0.1～5N。
在将植字部件2固定到文字板1时，在文字板1的表面配置植字部件2，在文字板1的表面侧的作为固定对象的植字部件2上，配置保护文字板1及植字部件2的表面的保护片54。
并且在植字部件2的表面侧配置缓冲部件55，经由该缓冲部件55由加压部件52进行加压。
作为缓冲部件55，例如能够使用硅橡胶等。
在本实施方式中，像这样在使用具有耐热性的夹具均匀地施加压力的同时从文字板1的背面侧照射激光L，从而使激光L在植字部件2的界面被吸收，利用热使植字部件2及文字板1中至少一方熔融，从而在文字板1上熔敷植字部件2。
在本实施方式中，激光L的照射条件(输出条件)优选波长为390～1200nm，输出为0.1W～10.0W(更优选5.0W～8.0W)，重复频率为1kHz～500MHz，扫描速度为1mm/s～100mm/s程度。
另外，激光L的光束形状优选不是在中央部具有波峰(ピーム)的一般的高斯分布形状，而是不具有波峰的均等分布的光束形状。
图7A及图8A是不具有波峰的光束的一个例子的俯视图，图7B及图8B是图7A及图8A所示光束的立体图。
作为激光L的光束形状，例如像图7A及图7B所示的大礼帽(top hat)形状或图8A及图8B所示的环形状等那样，优选使用小的均匀率高的形状的光束。
激光L的光束形状通过调整未图示的激光发生装置中的振荡出激光的共振器部(空腔谐振器)的结构、光的衍射(例如光束输出端的大小、波长)来决定。
在照射激光L的情况下，需要极力避免由于吸收激光L所产生的热的影响出现在植字部件2中的目视侧(即，植字部件2的表面)，为此，优选尽量争取从由于激光L而熔融的植字部件2的界面到植字部件2的表面为止的、在激光L的照射方向上的距离。
因此，例如，在植字部件2设有壁厚部的情况下，激光L的照射部位优选为该壁厚部。
在本实施方式中，壁厚部是指激光L的照射方向上的厚度厚的部分。
例如，如图4A所示，在植字部件2设有沿着长度方向延伸的脚部22的情况下，设有该脚部22的部分为植字部件2的厚度(激光L的照射方向上的厚度)厚的壁厚部。
因此，激光L的照射优选沿着该脚部22进行。
另外，即便在脚部22为图2A所示为细的脚部的情况下，在只要将该部分熔敷就能固定植字部件2这样的情况下，可以对该脚部22照射激光L来进行点焊。
另外，在脚部22以外作为植字部件2的设计也能设置壁厚部分的情况下，对该壁厚部分进行激光L的照射。
另外，如图2A及图3A所示，在植字部件2设有顶线23的情况下、或者如图5A所示，在植字部件2设有顶点24的情况下，优选对该顶线23或顶点24照射激光L。
设有顶线23或顶点24的部分在植字部件2中为高度最高部分，因此通过对该部分照射激光L，能够争取激光L的照射距离。
在图2A、图3A、图4A、图5A中，通过激光L的照射而熔融的部分用斜网线表示。
如图3A所示，在设有两条顶线23的情况下，可以对各顶线23分别使激光L往返，也可以对各顶线23和连接它们的部分使激光L以“コ”字状扫描。
在使激光L以“コ”字状扫描的情况下，关于连接各顶线23的部分，优选通过提高扫描的移动速度或者减弱激光L的输出等来尽量减少熔融的部分。
另外，在设有两条顶线23的情况下，如图3B所示，优选改变向各顶线23照射激光L时的照射角度，分别从斜下方向照射。
这样，能够进一步争取到顶线23为止的照射距离。
在图2B及图2C中，用箭头表示对顶线23照射激光L的情况下热在植字部件2内的扩散状况。
如图2B及图2C所示，在对顶线23照射激光L的情况下，热在厚度比较壁厚的部分的顶线23附近扩散，能够抑制热影响出现在植字部件2的表面。
接着，针对本实施方式中的植字固定方法进行说明。
在本实施方式中，在向文字板1固定植字部件2的情况下，如图6所示，在支撑部件51上载置作为压力均匀化夹具53的耐热玻璃板等，在其上载置配置有植字部件2的文字板1。
然后，在文字板1的表面侧的作为固定对象的植字部件2上，配置保护文字板1及植字部件2的表面的保护片54，进一步在植字部件2的表面侧配置缓冲部件55，经由该缓冲部件55由加压部件52进行加压。
在未图示的激光照射装置中，将照射的激光L的光束形状调整为不具有波峰的形状，对植字部件2中的顶线23或顶点24部分、或者设有脚部22的部分等壁厚部照射激光L。
由此，在均匀地施加压力的状态下从文字板1的背面侧照射激光L，由此，激光L在植字部件2的界面被吸收，由于热导致植字部件2及文字板1中至少一方熔融，从而在文字板1上熔敷植字部件2。
此时，由于激光熔敷而产生的热在植字部件2中的厚度比较厚的部分扩散，抑制了对植字部件2表面的热影响。
如上所述，根据本实施方式，在由透明或半透明的树脂形成的文字板1的表面配置由不透明或半透明的具有激光吸收特性的树脂形成的植字部件2，利用作为具有耐热性的夹具的压力均匀化夹具53在均匀地施加压力的同时从文字板1的背面侧照射激光L。
由此，使激光L在植字部件2的界面被吸收，由于热使植字部件2及文字板1中至少一方熔融，从而在文字板1上熔敷植字部件2。
这样，通过在均匀地施加压力的状态下进行激光熔敷，从而能够使激光熔敷所产生的热影响均匀地分散，能够防止对植字部件2的表面(即目视侧)的热影响，从而形成具有高质量的植字部件2(applied index)的文字板1。
另外，由于利用激光L的照射进行热熔敷来固定植字部件2，因此相比利用粘接剂的固定等其他的固定方法，能够显著提高耐冲击性能。
另外，对作为植字部件2的壁厚部的设有脚部22或顶线23、顶点24的部分照射激光L。
因此，能够争取激光L的照射距离，能够抑制激光熔敷所产生的热影响出现在植字部件2的表面(即目视侧)。
另外，在植字部件2设有顶线23、顶点24的情况下，即使在由于照射激光L产生的热影响导致出现发暗等的情况下，相比使植字部件2的表面为平面的情况不明显，并且，能够实现设计性也优异的植字。
并且，由于使激光L的光束形状为在前端部不具有波峰的大礼帽形状等，因此相比使用高斯分布形状的激光L的情况，照射激光L导致的热影响难以集中在一点，能够进一步降低对植字部件2的表面(即目视侧)的热影响。
此外，以上针对本发明的实施方式进行了说明，但是本发明不限定于该实施方式，在不脱离其主旨的范围内，当然能够进行各种变形。
例如，在本实施方式中，举例示出了从植字部件2的正下方照射激光L的情况，但是照射激光L的方向不限定于此。
例如，在朝向植字部件2的脚部22照射激光L的情况下，如图9A至图9C所示，可以从脚部22的斜下方照射激光L。
这样在倾斜照射激光L的情况下，相比从正下方照射，能够争取到到达植字部件2的表面为止的距离，能够抑制对植字部件2的表面的热影响。
另外，在该情况下，如图9C所示，可以将被照射激光L的部分(图9C中为植字部件2的脚部22)根据激光L的照射角度切成倾斜。
通过使激光L入射到照射对象物的角度大致为直角能够使热高效扩散。
另外，例如图10A所示，在希望将设计为中央部凹陷的植字部件2固定在文字板1上的情况下，关于成为薄壁的部分，可以将植字部件2的内部打通作为空洞，设置空气层25。
这样，通过在植字部件2的内部设置空气层25，能够抑制激光L的照射所产生的热的传导，能够抑制热影响导致的发暗、发黑出现在植字部件2的表面(即目视侧)。
另外，由于在植字部件2的内部设置隔热结构，因此也不会影响到植字部件2的外观。
另外，例如图10B所示，可以在植字部件2的下侧的侧部设置狭缝26。
在植字部件2的宽度狭窄等的情况下，激光L的热影响可能出现在植字部件2的侧部。
关于这一点，在植字部件2的侧部设有狭缝26的情况下，在该部分形成空气隔热层，能够抑制热的传导，能够抑制热影响导致的发暗、发黑出现在植字部件2的表面(即目视侧)。
另外，即便是该情况下，由于在植字部件2的内部的隐藏在与文字板1之间的部分设置隔热结构，也不会影响到植字部件2的外观。
另外，在本实施方式中，示出的是使用在前端部不具有波峰的光束形状的激光L的例子，但是激光L的光束形状不限定于此。
例如，在能充分争取到植字部件2的表面为止的照射距离的情况下、在植字部件2的内部设置隔热结构的情况下，激光L的光束形状也可以为一般的高斯分布形状。
另外，在本实施方式中，压力均匀化夹具53使用的是使激光L透射的耐热玻璃，但是压力均匀化夹具53不限定于此。
例如，即便是不使激光L透射的部件，通过在激光L的通道形成孔，也能够作为压力均匀化夹具来应用。
以上说明了本发明的若干个实施方式，但是本发明的范围并不限定于上述的实施方式，包含权利要求中记载的发明的范围及其均等范围。

Claims (5)

1.一种植字固定方法，其特征在于，具有：
在由透明或半透明的树脂形成的文字板的表面配置由不透明或半透明的具有激光吸收特性的树脂形成的植字部件的工序；
利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光的工序；以及，
使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件的工序，
在上述植字部件设置壁厚部，
上述激光的照射部位为上述壁厚部，
上述壁厚部是上述激光的照射方向上的厚度厚的部分。
2.根据权利要求1所述的植字固定方法，其特征在于，
在上述植字部件设置顶点或顶线，
对上述顶点或顶线照射上述激光。
3.根据权利要求1所述的植字固定方法，其特征在于，
上述激光为在前端部不具有波峰的光束形状。
4.一种显示板，其特征在于，具备：
由透明或半透明的树脂形成的文字板；以及
配置在上述文字板的表面且由不透明或半透明的具有激光吸收特性的树脂形成的植字部件，
利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光，从而使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件，
在上述植字部件设置壁厚部，
上述激光的照射部位为上述壁厚部，
上述壁厚部是上述激光的照射方向上的厚度厚的部分。
5.一种钟表，其特征在于，
具备显示板，该显示板具备：
由透明或半透明的树脂形成的文字板；以及
配置在上述文字板的表面且由不透明或半透明的具有激光吸收特性的树脂形成的植字部件，并且
利用具有耐热性的夹具均匀地施加压力并且从上述文字板的背面侧照射激光，从而使上述植字部件的界面吸收激光，利用热使上述植字部件以及上述文字板中的至少一方熔融，从而在上述文字板上熔敷上述植字部件，
在上述植字部件设置壁厚部，
上述激光的照射部位为上述壁厚部，
上述壁厚部是上述激光的照射方向上的厚度厚的部分。
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