CN111370251A - Integration of keyboard device and thin film structure - Google Patents
Integration of keyboard device and thin film structure Download PDFInfo
- Publication number
- CN111370251A CN111370251A CN201811587206.3A CN201811587206A CN111370251A CN 111370251 A CN111370251 A CN 111370251A CN 201811587206 A CN201811587206 A CN 201811587206A CN 111370251 A CN111370251 A CN 111370251A
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- China
- Prior art keywords
- key
- key cap
- film
- keycap
- cap body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/036—Light emitting elements
- H01H2219/037—Light emitting elements using organic materials, e.g. organic LED
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- Push-Button Switches (AREA)
Abstract
The present application relates to the integration of keyboard devices and thin film structures. The invention discloses a key cap for keys of a keyboard device, wherein the keys are arranged on the keyboard device, and the key cap is arranged on a key structure body. The key cap includes: the key cap comprises a fabric layer, a key cap body with a key cap body upper surface profile and a shaping film. The fabric layer is used for engraving a symbol representing the keycap on the fabric layer and allowing light to penetrate through the symbol; the shaping film is arranged between the fabric layer and the keycap body, so that the fabric layer is in a shape conforming to the outline of the upper surface of the keycap body. The invention can overcome the problems of dislocation, yellowing, deformation and the like of the symbols when the keycaps are manufactured in the prior art, and enables users to see the light transmission effect presented by the symbols on the keys of the backlight keyboard.
Description
Technical Field
The invention relates to integration of a keyboard device and a thin film structure.
Prior Art
Mechanical devices used by people are often configured with a physical keyboard, and a user enters words, numbers or patterns by striking key caps of the keyboard that indicate specific symbols. One of the physical keyboards is a backlight keyboard equipped on a notebook computer. The light emitting diode emits white light from the bottom of the backlight keyboard, and the white light penetrates through the laser engraving symbols above the keycaps, so that a user can clearly see the symbols on the keycaps.
In the industry, a symbol is formed by applying a technique such as screen printing, computer spraying, baking finish or laser engraving to the bottom surface of a hard film, and then an injection technique is applied in a mold to inject a plastic material onto the bottom surface of a formed film to form a key cap body, so as to form a half-formed key cap. The position of the formed film with the symbol in the mold is deviated, so that the symbol cannot be maintained at a fixed position when the formed film is pressed into the shape of the keycap, and the formed film is deformed and pulled, and finally the symbols on the whole row of keycaps on the keyboard are uneven, thereby causing a problem of poor yield. In addition, the heat and pressure of the injection technique are also liable to deform the formed symbol, which also causes a problem of poor yield. In addition, the global industry faces environmental protection problems when baking paint for keys, and the selection of a jig may cause tolerance. Therefore, the key cap manufactured by the prior art is easy to generate defects, and cannot meet the requirements of high yield and extremely low error in the industry.
In another technique, a symbol is laser engraved on the surface of the hard film, and the hard film with the symbol is subjected to plastic injection to form a half-molded key cap. However, the high heat energy of laser engraving will cause the symbols to have yellowing and generate burrs.
In view of the shortcomings in the prior art, the applicant has made extensive experiments and studies and finally conceives the present invention in the light of the spirit thereof, which can overcome the shortcomings in the prior art, and the following is a brief description of the present invention.
Disclosure of Invention
In order to overcome the problems of symbol dislocation, yellowing, deformation and the like in the process of manufacturing a key cap of a keyboard in the prior art, the invention provides a novel and improved solution, which is to attach a fabric layer (such as a Polyurethane (PU) layer or a textile layer) to a shaping film to form a film structure of the key cap, and assemble the film structure, the key cap body and the key structure body into a key so as to be assembled on a keyboard device.
Therefore, the invention provides a key for a keyboard device, which comprises a key structure body, a keycap body and a film structure. The key structure body is provided with an outer surface of the key structure body and is arranged on the keyboard device; the key cap body comprises an upper surface of the key cap body and an inner surface of the key cap body, wherein the inner surface of the key cap body is matched with the outer surface of the key structure body; the thin film structure is provided with a thin film structure inner surface and a thin film structure outer surface, wherein the thin film structure inner surface is combined with the upper surface of the keycap body, and the thin film structure outer surface is used for engraving symbols representing the keys on the thin film structure inner surface.
In one embodiment, the key cap body further comprises a key cap body upper surface profile, and the key further comprises a shaping film and a Polyurethane (PU) layer; the shaping film is arranged on the upper surface of the keycap body and takes a shape which is in accordance with the outline of the upper surface of the keycap body; the PU layer is arranged on the shaping film and used for laser engraving the symbol representing the key, and the light penetrates through the key through the symbol. In one embodiment, the material of the shaping film is polyethylene terephthalate (PET), Polycarbonate (PC), polyvinyl chloride (PVC), polypropylene (PP), Polyethylene (PE), or acrylonitrile-butadiene-styrene copolymer (ABS resin). In one embodiment, the thin-film structure is shaped into a shaped film by a first mold prior to being disposed on the keycap body. In one embodiment, the key cap body is formed by plastic injection, and the forming film and the key cap body are shaped into the key cap in the second mold. In one embodiment, the shaping film is bonded to the key cap body to make the key cap a backlight. In one embodiment, the key structure body has a supporting leg, and the key device has a fastening portion, and the supporting leg is fastened to the fastening portion.
The invention also provides a key cap for the keys of the keyboard device, wherein the keys are arranged on the keyboard device, the key cap is arranged on the key structure body, and the key cap comprises a fabric layer, a key cap body and a shaping film; the fabric layer is used for carving a symbol representing the keycap on the fabric layer and allowing light to penetrate through the symbol; the key cap body is provided with a key cap body upper surface outline; the shaping film is arranged between the fabric layer and the keycap body, so that the fabric layer is in a shape conforming to the outline of the upper surface of the keycap body.
In one embodiment, the fabric layer is a PU layer or a textile layer, and the shaping film is an in-mold shaping film or an in-mold decoration film.
The term "shaping film" herein refers to a film that can be formed on the surface of a face fabric layer (e.g., PU layer), and includes, but is not limited to, a film formed by coating a thermosetting resin or the like on a plane, a film attached to a face fabric layer, an in-mold molding (IMF) film, or an in-mold decoration (IMD) film.
The term "in-mold formed (IMF) film" as used herein refers to a film produced by a forming machine and then cut into a mold, which may generally comprise: PET, PC, PVC, PP, PE, ABS resin or gluing material. The term "in-mold decoration (IMD) film" herein refers to a film having text or graphics printed or transferred thereon, which may generally comprise: PET, PC, PVC, PP, PE, ABS resin or gluing material.
The term "symbol" herein refers to a symbol that indicates a particular meaning on a keyboard device, and is rendered on a screen by a user striking a keycap or key, processed by a computer device. "symbol" includes, but is not limited to, text, numbers, or patterns.
Drawings
The above objects and advantages of the present invention will become more apparent to those skilled in the art after referring to the following detailed description and accompanying drawings.
FIG. 1 is a side view of a film structure of the present invention.
FIG. 2 is a schematic view of the film structure of the present invention shaped into a formed film.
FIG. 3 is a schematic view of the shaped film of the present invention molded with a plastic injection body into a key cap in a mold.
FIG. 4 is a schematic view of a key cap with a laser engraved symbol of the present invention.
FIG. 5 is a top view of a key cap with a laser engraved symbol of the present invention.
Fig. 6 is a schematic diagram of a key of the keyboard apparatus of the present invention.
Detailed description of the preferred embodiments
The present invention will be fully understood from the following description of the embodiments, which is provided for by those skilled in the art, and the present invention is not limited to the embodiments described below, and other embodiments can be made by those skilled in the art without departing from the spirit of the disclosed embodiments.
FIG. 1 is a side view of a film structure according to the present invention. In fig. 1, a film structure 1 of a keycap of a backlight keyboard includes a fabric layer 2 and a shaping film 3, and the fabric layer 2 may be a Polyurethane (PU) layer or a textile layer. The first surface 4 of the fabric layer 2 is a surface on which a key cap is formed and on which a symbol can be engraved by laser, and the second surface 5 of the fabric layer 2 is a surface attached to the shaping film 3. The fabric layer 2 can contain hot melt adhesive, the fabric layer 2 is heated to release the hot melt adhesive, and then the second surface 5 is attached to the shaping film 3 to form the film structure 1. Alternatively, the face fabric layer 2 does not contain a hot melt adhesive, but a hot melt adhesive is applied to the face fabric layer 2 or the shaping film 3, and the environment in which the face fabric layer 2 and the shaping film 3 are placed is heated and the two layers are attached to each other. The optional shaping film 3 includes an in-mold molding film (IMF) or an in-mold decoration (IMD) film, and the material thereof includes, but is not limited to, polyethylene terephthalate (PET), Polycarbonate (PC), polyvinyl chloride (PVC), polypropylene (PP), Polyethylene (PE), or acrylonitrile-butadiene-styrene copolymer (ABS resin).
Please refer to fig. 2, which is a schematic diagram of the film structure of the present invention being shaped into a formed film. In fig. 2, the sheet-like film structure 1 is heated to a forming temperature, stretched to a convex or concave single-sided mold (not shown), and the film structure 1 is shaped into a formed film 6 by pressing it against the mold (vacuum suction), wherein one side of the formed film 6 is an upper surface 6a on which the fabric layer 2 is made, and the other side is a lower surface 6b on which the formed film 3 is made, and the formed film 6 can be used as an injection molding substrate in a subsequent plastic injection step. The shaping film 3 in the shaping film 6 is in a shape conforming to the outline of the upper surface of the keycap, and the fabric 2 attached to the shaping film 3 is also in the shape of the upper surface of the keycap for subsequent laser engraving of symbols on the upper surface. In fig. 2, the forming membrane 6 is illustrated as a single square key cap shape, but those skilled in the art will appreciate that the forming membrane 6 can also be shaped as a long key cap (e.g. space key) or a circular button-like key cap. Moreover, a sheet of the thin film structure can be shaped to have one or more key cap shaped forming films, which facilitate the mass fabrication of key caps and keys.
Please refer to fig. 3, which is a schematic diagram of the forming film and the plastic injection body of the present invention being molded into the key cap in the mold. In fig. 3, the forming film 6 is set in a closed mold composed of a female mold 7 and a male mold 8, and a molten thermoplastic or thermosetting plastic is injected into the male mold 8 under the forming film 3 by a plastic injection technique, cooled and solidified to form a body 9 (or called a key cap body), and the body 9 and the forming film 6 are formed into a key cap 10 (see fig. 4). Since the main body 9 is molded with the forming film 6 by plastic injection, the contour of the upper surface of the main body 9 (also called as the upper surface 9a of the key cap main body) conforms to the contour of the lower surface 6b of the forming film 6 to form the key cap 10 together.
Alternatively, the sheet-like thin-film structure 1 can be directly molded in a closed mold by performing the molding and plastic injection processes simultaneously to form the key cap 10 without going through the process of molding the thin-film structure into the molding film 6 (fig. 2). That is, the sheet-shaped film structure 1 is placed between the unclosed male mold 8 and female mold 7, when the male mold 8 and female mold 7 are closed and close to each other, the film structure 1 is shaped according to the concave-convex structure of the male mold 8 and female mold 7, and simultaneously the molten thermoplastic plastic or thermosetting plastic is injected into the male mold 8 under the film structure 1, cooled and solidified to form the body 9, at which time the film structure 1 and the body 9 together form the keycap 10.
Referring to fig. 4, the first surface 4 of the key cap 10 detached from the female mold 7 and the male mold 8 is laser engraved to form a symbol 11. As shown in fig. 5, light can penetrate the key cap 10 through this symbol 11. When the key cap 10 is further fabricated as a key and is mounted on a keyboard device (e.g., a backlight keyboard), light emitted from a Light Emitting Diode (LED) at the bottom of the keyboard device penetrates the key cap 10 through the symbol 11, and the symbol on the key of the keyboard device is seen by the eyes of a user to show a light-transmitting effect. Especially, the light transmission effect is more obvious in a dark place or a place with low background brightness.
In the present invention, the thickness of the PU layer is between 0.1mm and 0.5mm, and the thickness of the in-mold film or the in-mold decoration film is between 0.1mm and 0.5mm or between 0.8mm and 1.0 mm. The thickness of the material can be selected by those skilled in the art according to the actual needs.
The manufactured keycaps are independent from each other and can be processed into keys of a keyboard device.
Besides manufacturing the keycap by using a plastic injection technology, the plastic film and the mechanism part can be bonded into a light-transmitting part through an adhesive, and the light-transmitting part is further manufactured into the key of the keyboard device.
Please refer to fig. 6, which is a schematic diagram of a key of a keyboard apparatus according to the present invention. In fig. 6, the key 20 of the keyboard apparatus 32 includes a film structure 21, a key cap body 26 and a key structure body 30. The key structure body 30 has an outer surface 31 and a leg 33, and is disposed on the keyboard device 32 by the leg 33 and the fastening portion 34 of the keyboard device 32 being fastened to each other. One specific structure of the key structure body 30 is a scissors-shaped structure as shown in fig. 6, and when the assembled key 20 is pressed downwards under force, the scissors-shaped structure of the key structure body 30 is deformed by being compressed up and down; when the stress on the key 20 disappears, the deformation of the key structure body 30 also disappears and returns to the original shape. The key cap body 26 is a mechanism formed by opening a mold, and includes a key cap body upper surface 27, a key cap body upper surface contour 28, and a key cap body inner surface 29, wherein the key cap body inner surface 29 can be matched with the key structure body outer surface 31. The term "cooperate" refers to the key structure body outer surface 31 and the key cap body inner surface 29 being structurally buckled, bonded or pivoted to each other, so that the key structure body 30 and the key cap body 26 are physically contacted or bonded to each other, and can move or physically deform when necessary under an external force. Further, the thin-film structure 21 having the thin-film structure outer surface 24 and the thin-film structure inner surface 25 is molded into the shaped film 35 before being disposed on the key cap body 26. The film structure inner surface 25 and the key cap body upper surface 27 are bonded such that the plastic injection molded key cap body 26 and the molding film 35 become a key cap 36 (preferably both bonded with an adhesive) and the symbol representing the key 20 is engraved on the film structure outer surface 24, the key cap 36 as a whole acting as a backlight. Therefore, the thin film structure 21, the key cap body 26 and the key structure body 30 are assembled in sequence as the key 20 on the keyboard device 32 by the dotted line a-a'.
Further, the film structure 21 of the key 20 further includes a shaping film 23 and a Polyurethane (PU) layer 22, the PU layer 22 is disposed on the shaping film 23, and the shaping film 23 is disposed on, combined with, and shaped to conform to the contour 28 of the upper surface of the key cap body.
Example (b):
1. a key for a keyboard device, comprising: the key structure body is provided with an outer surface of the key structure body and is arranged on the keyboard device; the key cap body comprises an upper surface of the key cap body and an inner surface of the key cap body, wherein the inner surface of the key cap body is matched with the outer surface of the key structure body; and the thin film structure is provided with a thin film structure inner surface and a thin film structure outer surface, wherein the thin film structure inner surface is combined with the upper surface of the keycap body, and the thin film structure outer surface is used for engraving the symbols representing the keys on the thin film structure inner surface.
2. The key of embodiment 1, wherein the key cap body further comprises a key cap body upper surface profile, and the key further comprises: the shaping film is arranged on the upper surface of the keycap body and takes a shape which is in accordance with the outline of the upper surface of the keycap body; and a Polyurethane (PU) layer disposed on the shaping film for laser engraving a symbol representing the key thereon, and light passing through the symbol to penetrate the key.
3. The key of embodiment 1 or 2, wherein the plastic film is made of one selected from the group consisting of polyethylene terephthalate (PET), Polycarbonate (PC), polyvinyl chloride (PVC), polypropylene (PP), Polyethylene (PE), and acrylonitrile-butadiene-styrene (ABS) resin.
4. The key of any of embodiments 1-3, wherein the thin film structure is shaped into a shaped film by a first mold before being disposed on the key cap body.
5. The key of any of embodiments 1-4, wherein the key cap body is formed by plastic injection molding, and the molding film is molded with the key cap body in a second mold to form the key cap.
6. The key of any of embodiments 1-5, wherein the shaping film is bonded to the key cap body to make the key cap a backlight.
7. The key of any of embodiments 1-6, wherein the key structure body has a leg, and the key device has a locking portion, and the leg is locked to the locking portion.
8. A key cap for a key of a keyboard device, wherein the key is disposed on the keyboard device, and the key cap is disposed on a key structure body, the key cap comprising: the fabric layer is used for engraving a symbol representing the keycap on the fabric layer and allowing light to penetrate through the symbol; the key cap body is provided with an upper surface outline of the key cap body; and the shaping film is arranged between the fabric layer and the keycap body, so that the fabric layer is in a shape conforming to the outline of the upper surface of the keycap body.
9. The key cap of embodiment 8, wherein the fabric layer is a PU layer or a textile layer, and the shaping film is an in-mold film or an in-mold decoration film.
The invention belongs to a difficult innovation, has deep industrial value and is applied according to law. Furthermore, the invention may be modified in any way by a person skilled in the art, without departing from the scope of protection as claimed in the appended claims.
[ notation ] to show
1. 21 thin film structure
2 Fabric layer
3. 23 shaped film
4 first side
5 second side
6. 35 formed film
6a upper surface
6b lower surface
7 female die
8 public mould
9 main body
9a key cap body upper surface
10. 36 keycap
11 symbol
13 intermediate layer
20 push-button
22 Polyurethane (PU) layer
23 shaped film
24 outer surface of film structure
25 inner surface of film structure
26 keycap body
27 keycap body upper surface
28 Key Cap body Upper surface Profile
29 inner surface of key cap body
30 key structure body
31 outer surface of key structure body
32 keyboard device
33 support leg
34 fastener part
Dotted line A-A
Claims (9)
1. A key for a keyboard device, comprising:
the key structure body is provided with an outer surface of the key structure body and is arranged on the keyboard device;
the key cap body comprises an upper surface of the key cap body and an inner surface of the key cap body, wherein the inner surface of the key cap body is matched with the outer surface of the key structure body; and
and the thin film structure is provided with a thin film structure inner surface and a thin film structure outer surface, wherein the thin film structure inner surface is combined with the upper surface of the keycap body, and the thin film structure outer surface is used for engraving the symbol representing the key.
2. The key of claim 1, wherein the key cap body further comprises a key cap body upper surface profile, and the key further comprises:
the shaping film is arranged on the upper surface of the keycap body and takes a shape which is in accordance with the outline of the upper surface of the keycap body; and
and the Polyurethane (PU) layer is arranged on the shaping film and is used for laser engraving the symbol representing the key, and the light penetrates through the key through the symbol.
3. The key of claim 2, wherein the plastic film is made of one selected from the group consisting of polyethylene terephthalate (PET), Polycarbonate (PC), polyvinyl chloride (PVC), polypropylene (PP), Polyethylene (PE), and Acrylonitrile Butadiene Styrene (ABS) resin.
4. The key of claim 1, wherein the thin film structure is shaped into a shaped film by a first mold prior to being disposed on the keycap body.
5. The key of claim 4, wherein the key cap body is injection molded from plastic and the molding film is molded with the key cap body in a second mold to form the key cap.
6. The key of claim 5, wherein the shaped film is bonded to the key cap body to make the key cap a backlight.
7. The key of claim 5, wherein the key structure body has a leg, the key device has a latch portion, and the leg latches the latch portion.
8. A key cap for a key of a keyboard device, wherein the key is disposed on the keyboard device, and the key cap is disposed on a key structure body, comprising:
the fabric layer is used for representing that the symbol of the keycap is carved on the material layer and allowing light to penetrate through the symbol;
the key cap body is provided with an upper surface outline of the key cap body; and
and the shaping film is arranged between the fabric layer and the keycap body, so that the fabric layer is in a shape conforming to the outline of the upper surface of the keycap body.
9. A key cap according to claim 8, wherein the fabric layer is a Polyurethane (PU) layer or a textile layer, and the shaping film is an in-mold film or an in-mold decoration film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811587206.3A CN111370251A (en) | 2018-12-25 | 2018-12-25 | Integration of keyboard device and thin film structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811587206.3A CN111370251A (en) | 2018-12-25 | 2018-12-25 | Integration of keyboard device and thin film structure |
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| Publication Number | Publication Date |
|---|---|
| CN111370251A true CN111370251A (en) | 2020-07-03 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811587206.3A Pending CN111370251A (en) | 2018-12-25 | 2018-12-25 | Integration of keyboard device and thin film structure |
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| Country | Link |
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| CN (1) | CN111370251A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000268662A (en) * | 1999-01-11 | 2000-09-29 | Tokyo Tokushu Insatsu Kogyo Kk | Push-button switch |
| CN102339681A (en) * | 2011-07-24 | 2012-02-01 | 苏州达方电子有限公司 | Key cap combination, key cap combination manufacturing method and keyboard manufacturing method |
| CN107068463A (en) * | 2017-05-16 | 2017-08-18 | 苏州达方电子有限公司 | Keyboard membrane, waterproff keyboard, the preparation method of keyboard membrane, Waterproof push-button assembly and illuminated keyboard |
| CN207338197U (en) * | 2017-07-14 | 2018-05-08 | 王为明 | Cover type key board unit |
| CN207895397U (en) * | 2018-01-10 | 2018-09-21 | 世洋科技股份有限公司 | Cover type key board unit |
-
2018
- 2018-12-25 CN CN201811587206.3A patent/CN111370251A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000268662A (en) * | 1999-01-11 | 2000-09-29 | Tokyo Tokushu Insatsu Kogyo Kk | Push-button switch |
| CN102339681A (en) * | 2011-07-24 | 2012-02-01 | 苏州达方电子有限公司 | Key cap combination, key cap combination manufacturing method and keyboard manufacturing method |
| CN107068463A (en) * | 2017-05-16 | 2017-08-18 | 苏州达方电子有限公司 | Keyboard membrane, waterproff keyboard, the preparation method of keyboard membrane, Waterproof push-button assembly and illuminated keyboard |
| CN207338197U (en) * | 2017-07-14 | 2018-05-08 | 王为明 | Cover type key board unit |
| CN207895397U (en) * | 2018-01-10 | 2018-09-21 | 世洋科技股份有限公司 | Cover type key board unit |
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Application publication date: 20200703 |