WO2011081148A1 - Key-top structure, electronic device, and method of manufacturing key-top structure - Google Patents
Key-top structure, electronic device, and method of manufacturing key-top structure Download PDFInfo
- Publication number
- WO2011081148A1 WO2011081148A1 PCT/JP2010/073598 JP2010073598W WO2011081148A1 WO 2011081148 A1 WO2011081148 A1 WO 2011081148A1 JP 2010073598 W JP2010073598 W JP 2010073598W WO 2011081148 A1 WO2011081148 A1 WO 2011081148A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- key top
- key
- curable resin
- top structure
- ultraviolet curable
- Prior art date
Links
Images
Classifications
-
- 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
- H01H13/02—Details
- H01H13/12—Movable parts; Contacts mounted thereon
- H01H13/14—Operating parts, e.g. push-button
-
- 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
- H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
-
- 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
- H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/058—Curing or vulcanising of rubbers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/022—Telephone handset
Definitions
- the present invention relates to a key top structure, an electronic device, and a method for manufacturing the key top structure.
- a key top structure used for electronic devices such as mobile phones is generally formed by applying ink to a resin molded product and / or decorating such as character printing, and then forming a series of key top structures.
- many techniques for bonding and arranging on a polyethylene terephthalate (PET) film or silicone rubber, which is a flexible substrate, are used.
- PET polyethylene terephthalate
- an ultraviolet curable resin is molded on a film-like base material, and on the back surface of the film-like base material.
- a key top structure with printing and / or decoration is used.
- Patent Document 1 As a technique for manufacturing such a key top structure, there is one disclosed in Patent Document 1.
- the key top portion is formed on the front surface side (top surface side) of the base material by the method disclosed in the above-mentioned Patent Document 1, and the colored layer is further formed on the back surface side of the base material.
- the key top structure of a member there are the following problems.
- the base material is made of polyethylene terephthalate (PET) or the like formed by biaxial stretching, the stretchability is not excellent. Therefore, when the user presses the key top structure, the click feeling is not excellent (first problem).
- PET polyethylene terephthalate
- the key top structure is formed on the surface of the base material by the technique disclosed in Patent Document 1, the surface side (the top side) is caused by shrinkage when the key top member is produced by curing the ultraviolet curable resin.
- the key top structure is deformed so that the surface side is concave (the key top structure is warped; the second problem).
- the thickness dimension of the base material is increased, there is generally a portion that cannot be fixed with the fixing tape at the end of the base material due to the offset of the fixing tape (double-sided tape) or the like.
- the base material when the base material is thickened, the base material is not easily deformed even when the key top portion is pushed in, and is not suitable as a key top structure.
- the present invention has been made based on the above circumstances, and its object is to solve at least one of the first problem and the second problem, when the key top structure is pushed in.
- the first side surface of the key top structure of the present invention is to inject a liquid ultraviolet curable resin into the concave portion of the molding die and cover the ultraviolet curable resin injected into the concave portion,
- the substrate is positioned in close contact with the UV curable resin, and the UV curable resin is irradiated with ultraviolet rays to cure the UV curable resin.
- the ultraviolet curable resin shrinks upon curing, but by peeling the base material from the integral body, it becomes possible to suppress deformation due to shrinkage after the key top member is cured. Therefore, it is possible to suppress deformation so that the surface side (top surface side) of the key top member is concave.
- by peeling off the base material it is possible to eliminate local deformation that occurs at the end of the key top base material.For example, even when touching when operating a key, it is possible to prevent the user from feeling caught by local deformation. Become.
- the key top member may be peeled off from the base material. Then, it is possible to eliminate such a problem by peeling off the base material.
- At least one side of the portion corresponding to the key top in the liquid ultraviolet curable resin is located closer to the center than the end of the side.
- the key top member that protrudes from the inside of the key top is protruded to the side away from the inside of the key top. It is preferable that it is linear.
- At least one side of the key top can maintain a linear shape in the curing shrinkage of the uncured ultraviolet curable resin. Therefore, it is possible to realize a key top that is less affected by curing shrinkage.
- a sheet-like portion and a plurality of key tops are formed by curing an ultraviolet curable resin, and the key top has a thickness dimension larger than that of the sheet-like portion.
- a key top member having a portion in which a plurality of key tops are arranged in a row with a predetermined interval is formed, and an ultraviolet curable resin is cured on the base material to form the key top member.
- deformation suppression means for suppressing deformation due to shrinkage of the key top member after curing is provided.
- the ultraviolet curable resin shrinks upon curing, but the presence of the deformation suppressing means can suppress deformation due to shrinkage after curing of the key top member. For this reason, it is possible to prevent the key top structure from being deformed so that the surface side (the top surface side) is concave.
- the deformation suppressing means peels the base material from the key top member after the shrinkage after curing of the key top member is within a predetermined range. It is preferable that it is comprised.
- the deformation suppressing means is configured by peeling the base material from the key top member after the shrinkage after curing falls within a predetermined range, so the key top member has excellent stretchability. No base material is in a non-bonded state. Therefore, when the user presses the key top structure, it is possible to eliminate a state where the click feeling is not excellent.
- the thickness of the sheet-like portion is in the range of 0.03 mm to 0.15 mm, and a predetermined interval between the plurality of key tops The interval is preferably 0.2 mm to 1.0 mm.
- a sheet-like portion and a plurality of key tops are formed by curing an ultraviolet curable resin, and the key top has a thickness dimension larger than that of the sheet-like portion.
- a key top member having a portion in which a plurality of key tops are arranged in a row with a predetermined interval, and the thickness dimension of the sheet-like portion is in the range of 0.03 mm to 0.15 mm
- the predetermined distance between the plurality of key tops is preferably in the range of 0.2 mm to 1.0 mm.
- the key top member has a Shore D hardness within a range of 40 degrees to 80 degrees.
- the key top member when any key top is pushed in from the top surface side, the key top member is only a pushing object of the pushed key top. It is preferable to include a deformation allowing means for pressing the key and independently pressing the key top other than the pressed key top so that the key top does not press the object to be pressed.
- the electronic device of the present invention includes each of the above-described key top structure inventions, and has an installation site for installing the key top member, and the installation site is in direct contact with or indirectly from the key top member. It is preferable that it becomes a part of the component of a deformation
- the installation site can directly or indirectly contact the key top member, thereby further suppressing deformation due to shrinkage after the key top member is cured. For this reason, it is possible to further favorably suppress deformation so that the surface side (top surface side) of the key top structure becomes concave.
- the key top structure manufacturing method includes an injection step of injecting a liquid ultraviolet curable resin into the concave portion of the molding die, and covering the ultraviolet curable resin injected into the concave portion,
- the ultraviolet curable resin shrinks upon curing, but the presence of the peeling step can suppress deformation due to shrinkage after curing of the key top member. For this reason, it is possible to prevent the key top structure from being deformed so that the surface side (the top surface side) is concave.
- the click feeling when the key top structure is pushed in, the click feeling can be excellent.
- the key top member is produced by curing the ultraviolet curable resin, deformation of the key top member can be suppressed.
- FIG. 2 is a cross-sectional view showing a configuration of a key arrangement portion and a key top structure, and a part along the line AA of FIG.
- FIG. 2 is a cross-sectional view showing a configuration of a key arrangement portion and a key top structure, and a part along the line AA of FIG.
- It is a flowchart for demonstrating the manufacturing method of a keytop structure.
- It is a schematic diagram for demonstrating the manufacturing method of a keytop structure using a shaping die.
- an uncured key top member it is a top view showing the state where the size of the transversal direction along the end of a longitudinal direction was made larger than the size of the transversal direction along the center of a longitudinal direction.
- the uncured key top member in addition to the state of FIG.
- FIG. 5 a plan view showing a state in which the longitudinal dimension along the end in the lateral direction is larger than the longitudinal dimension along the center in the lateral direction. It is. It is a figure which shows the hardening shrinkage
- a key top structure 60 and an electronic apparatus using the key top structure 60 according to an embodiment of the present invention will be described with reference to the drawings.
- a mobile terminal 10 that can be used as a mobile phone device, a mail terminal, or the like will be described as an example of an electronic device.
- the electronic device is not limited to the mobile terminal 10. As long as it has the key top structure 60, it may be anything.
- the mobile terminal 10 in the present embodiment includes a housing unit 20, a display unit 30, a cursor key unit 40, and a key arrangement unit 50.
- the longitudinal direction of the mobile terminal 10 is described as the X direction
- the short direction of the mobile terminal 10 is defined as the Y direction
- the thickness direction of the mobile terminal 10 is described as the Z direction.
- the housing unit 20 is a part that covers the internal configuration of the mobile terminal 10 and protects the internal configuration from external impacts, dust, and the like.
- the housing 20 is appropriately provided with an opening or a recess, and a display 30 is provided in one of the openings or the recess.
- the display unit 30 includes, for example, an organic EL (electroluminescence) display, a liquid crystal display, and the like, and an image is expressed as a collection of pixels having a predetermined gradation of RGB based on a display driver of a control unit (not shown). .
- the cursor key unit 40 includes an annular button unit 41 and a center button unit 42, and the cursor key unit 40 and the annular button unit 41 are provided on the housing unit 20.
- the top surface side of the key top 61a protrudes from the opening.
- the annular button portion 41 has a portion to be pressed at intervals of 90 degrees, for example.
- the center button portion 42 is a portion where a portion to be pressed (the top surface side of the key top 61 a) is surrounded by the annular button portion 41.
- a total of four key portions provided side by side in the X direction with respect to the cursor key portion 40 may be included in the cursor key portion 40, and It may be included.
- the top surface side of the key top 61a protrudes from the opening of the housing portion 20 in the same manner as the cursor key portion 40.
- three key tops 61a having the same shape are arranged side by side in the Y direction, for example, and the total number of key tops 61a is 32.
- the number of key tops 61a is not limited to 32, and any number may be provided. Typical numbers of key tops 61a include, for example, between 15 and 19, and between 30 and 50.
- the arrangement of the key tops 61 on the left side and the back side when the user inputs is in the order of QWERTY, and hence is called a QWERTY keyboard arrangement. It is.
- Such a key arrangement is also adopted in the mobile terminal 10 as shown in FIG. 1 when 30 or more key tops 61 are arranged.
- positioning part 50 is good also as an arrangement
- the key arrangement structure 50 of the present embodiment as shown in FIG. 2 is embodied in the key arrangement unit 50 described above.
- the key top structure 60 may be configured to be embodied in the cursor key unit 40, or may be configured to embody the key top structure 60 in both the key arrangement unit 50 and the cursor key unit 40.
- an installation site where the key top structure 60 is installed is present inside the housing unit 20. This installation site can also be a part of the constituent elements of the deformation suppressing means described later by directly contacting or indirectly contacting the key top member 61 described later.
- the cursor key unit 40 and the key arrangement unit 50 electrically connect a fixed contact 72 and a disc spring-like member 73, which will be described later, when the user presses the top surface of the key top 61a with a finger or the like. It is possible to contact.
- a control unit (not shown) can execute a predetermined function corresponding to the pressing.
- the key arrangement unit 50 includes a key top member 61, a colored layer 62, a presser 70, and a substrate 71.
- the key top member 61 constitutes the key top structure 60 together with the colored layer 62.
- the key top member 61 is formed by curing an ultraviolet curable resin by ultraviolet irradiation.
- an ultraviolet curable resin what added the photoinitiator etc. to the main ingredient containing a photopolymerization type prepolymer and a monomer can be used.
- the ultraviolet curable resin in addition to the above, a filler, an antioxidant, a reaction accelerator, a reaction inhibitor, a stabilizer, a colorant, and the like may be blended as necessary.
- monomers and / or oligomers such as acrylic, methacrylic, styrene, unsaturated polyester, polyester polyol, polyester ether, urethane, silicon, epoxy or phenol, Monomers and / or oligomers of these derivatives, or a mixture of a plurality of these can be used.
- the ultraviolet curable resin a resin having a small curing shrinkage, transparent, and excellent in heat resistance, environment resistance, colorability, and moldability is desirable. Specifically, acrylic, methacrylic, allyl, It is desirable to use urethane-based, unsaturated polyester-based, silicon-based materials, or derivatives or mixtures thereof.
- the thickness of the cured resin is more suitable when the thickness dimension is 0.3 mm or less or smaller than 0.3 mm. Yes.
- a resin cured product of a resin such as polycarbonate is formed by injection molding, the thickness of the resin cured product is more suitable when it is 0.5 mm or more or larger than 0.5 mm.
- the cured resin is formed by curing the ultraviolet curable resin.
- a cured resin product may be formed by injection molding.
- the key top member 61 formed by curing the ultraviolet curable resin preferably has a Shore D hardness in the range of 40 degrees to 80 degrees.
- the key top member 61 has a key top 61a and a sheet-like portion 61b.
- the key top 61a is a portion provided thicker than other portions (the sheet-like portion 61b in FIG. 2) of the key top member 61.
- the thickness dimension S of the sheet-like portion 61b is preferably in the range of 0.03 mm to 0.15 mm.
- the thickness dimension is smaller than 0.03 mm, the sheet-like portion 61b is often damaged, and when the thickness dimension S is larger than 0.15 mm, the deformation flexibility of the sheet-like portion 61b is increased. It is because it is damaged.
- it is more preferable to be in the range of 0.03 mm to 0.10 mm, and it is even more preferable to be in the range of 0.03 mm to 0.05 mm.
- the distance L between the key tops 61a is preferably in the range of 0.2 mm to 1.0 mm.
- the interval L is set to a value within such a range, it is possible to arrange a large number of key tops 61 while increasing the area of the key tops 61 and ensuring good pressability with fingers. Yes.
- a colored layer 62 is formed on the back surface side (Z2 side in FIG. 2) of the key top member 61. In addition, it is good also as the key top structure 60 that this colored layer 62 does not exist.
- the presser 70 (indicated by a broken line in FIG. 2) is provided so as to protrude toward the substrate 71 from the back surface side of the colored layer 62.
- the pressing element 70 is formed integrally with an elastic sheet, for example, and may be formed by adhering the elastic sheet to the back surface side of the colored layer 62. Further, a protrusion that becomes the pressing element 70 is formed. Alternatively, it may be formed by bonding to the back side of the colored layer 62. Further, the key top structure 60 may not include the pressing element 70 or may include the pressing element 70.
- a substrate 71 is provided in a state of facing the key top structure 60.
- Fixed contacts 72 a and 72 b and a disc spring-like member 73 are provided on the surface of the substrate 71 facing the key top structure 60.
- the fixed contacts 72 a and 72 b are a part of conductive parts formed on the substrate 71.
- the disc spring-like member 73 corresponds to an example of an object to be pushed in the claims.
- the disk spring-like member 73 has a shape in which the cup shape is reversed in appearance, and the edge of the disk spring-like member 73 is in contact with at least a part of the fixed contact 72a on the substrate. .
- the disc spring-like member 73 is provided so as to be capable of buckling (plane buckling).
- a part of the disc spring-like member 73 is recessed from the state of projecting in the Z1 direction. It transforms into a state to do. At this time, a part of the disc spring-like member 73 comes into contact with the fixed contact 72b, and a state where electrical conduction is possible occurs.
- the buckled state disappears due to the elasticity of the disc spring-like member 73 and returns to the original state.
- the disc spring-like member 73 and the fixed contact 72 are not in contact with each other and are electrically non-conductive.
- FIG. 3 is a flowchart for explaining the outline of the manufacturing method of the key top structure 60.
- FIG. 4 is a schematic diagram for explaining the manufacturing method of the key top structure 60 with the molding die 101 as the center.
- the liquid ultraviolet curable resin M is filled into the molding die 101 from a pressurized tank (not shown) (S01; see FIG. 4A).
- the feed roller 102 on which the base material 110 is stretched is positioned on one end side of the molding die 101 (left side in FIG. 4B) (S02). After that state, the feed roller 102 is moved from one end side to the other end side (right side in FIG. 4C) (S03). Then, as shown in FIG. 4 (c), the ultraviolet curable resin M whose upper surface is not flat is pushed out, and the upper surface of the ultraviolet curable resin M is flat so as to follow the substrate 110. It becomes. And the base material 110 is located in the state which covers the recessed part 103 on the upper surface side of the ultraviolet curable resin M.
- FIG. 4 (c) the ultraviolet curable resin M whose upper surface is not flat is pushed out, and the upper surface of the ultraviolet curable resin M is flat so as to follow the substrate 110. It becomes.
- the base material 110 is located in the state which covers the recessed part 103 on the upper surface side of the ultraviolet curable resin M.
- the key top member 61 (ultraviolet curable resin M)
- the key top member 61 (ultraviolet curable resin M)
- the state shown in FIG. 6 is obtained.
- the dimension of the key top member 61 (ultraviolet curable resin M) in the longitudinal direction is the short direction.
- shrinkage when the uncured key top member 61 (ultraviolet curable resin M) is cured also occurs in the key top 61. That is, when the state before curing is adjusted to a specified dimension without considering curing shrinkage, as shown in FIG. 7A, the end portions of the sides of the key top 61 are cured by the curing of the ultraviolet curable resin M. The region closer to the center contracts to dent inward. For this reason, in the case shown in FIG. 7B, in consideration of such curing shrinkage, when the ultraviolet curable resin M is in an uncured state, the portion closer to the center than the end of each side of the key top 61 is outside ( It protrudes to the side away from the inside of the key top 61.
- the concave portion 103 of the molding die 101 is set in a state in which the left key top 61 in FIG. Then, as shown on the right side of FIG. 7B, a key top 61 having a prescribed size is formed by curing shrinkage.
- ultraviolet irradiation is performed by bringing the ultraviolet irradiation device 105 close to the molding die 101 (S04; see FIG. 4 (d)).
- the ultraviolet curable resin M is cured.
- the ultraviolet irradiation device 105 is retracted upward. Then, the solidified portion as the key top member 61 is peeled off from the molding die in a state of being attached to the base 110 (S05).
- the part where the key top member 61 is adhered to the base material 110 is taken out, and the base material is peeled off from the key top member 61 (S06).
- a predetermined chemical may be applied to the base material.
- a timing which peels the base material 110 from the keytop member 61 for example, immediately after the ultraviolet irradiation by the ultraviolet irradiation device 105 is performed is desirable.
- the key top member 61 is manufactured as described above. Thereafter, the colored layer 62 may be formed on the back surface of the key top member 61 by, for example, decorative printing. Moreover, you may make it perform the heat processing (heating process) for hardening the key top member 61 manufactured as mentioned above.
- the distance between the key tops decreases as a contradiction. If the distance between the key tops is small, interference may occur between adjacent key tops, which may impair the operational feeling.
- FIG. 8 the relationship between the space
- the load required for such deformation is the sum of the loads required for these deformations plus the load required when pressing the disc spring member, and the pressing feeling during operation deteriorates.
- the key top member is formed in this manner, the molded product of the ultraviolet curable resin and the base material are bonded or in a strong adhesive state. Therefore, in order to improve the feeling of pressing during the operation as described above, it is necessary to minimize the thickness dimension of the base material or to use a flexible material as the base material. However, when the thickness dimension of the base material is minimized, and when a flexible material is used as the base material, there is a problem that warpage increases.
- Table 1 shows the experimental results of measuring the load required for pressing and the click feeling when the thickness dimension of the base material was changed between 0.05 mm and 0.15 mm.
- the click rate (%) which is an index value indicating the click feeling, is a value (%) defined by the following equation when the same disc spring-like member is used.
- C represents the click rate (%)
- P represents the peak load (unit: grams)
- B represents the bottom load (unit: grams).
- the peak load indicates the maximum load before the disc spring-like member buckles
- the bottom load indicates the minimum load that can maintain the buckled state after the disc spring-like member buckles.
- the material of the base material at this time is polyethylene terephthalate (PET).
- PET polyethylene terephthalate
- the warp size of the key top structure at each thickness dimension, whether the warp can be corrected by the double-sided tape and Table 2 shows the experimental results of measuring the feeling of catching at the end.
- the warp of the key top structure referred to here is the end on the back side of the key top structure with respect to the reference surface when the center portion on the back surface of the key top structure is in contact with the reference surface. Refers to the raised height.
- the feeling of catching at the end of the key top structure means that the end of the key top structure has a larger curvature than the above-mentioned warp, and local deformation occurs in the same direction as the warp. It feels like it gets caught in the hand when you touch the end of the hand.
- Table 2 the experiment was conducted using a key top structure having a length dimension from one end to the other end of 50 mm.
- the thickness dimension of the base material changes as in Table 1 above, the load required for pressing when the base material material (material) is changed, and the experimental results measured for the click feeling, Table 3 shows.
- the thickness dimension of each base material is 0.1 mm.
- the load of a key top that was cut in advance on a base material having a thickness of 0.2 mm and made of silicone rubber was 234 g, and the click rate was 27%.
- the thickness dimension of the base material is 0.05 mm
- a large warp occurs in the key top structure
- the thickness dimension of the base material is 0.125 mm
- the key top The warpage in the structure can be suppressed to about 1.5 mm.
- the thickness dimension of the base material is 0.05 mm
- the warp of the key top structure is large, but the base material itself is thin, so that there is no so-called waist.
- the thickness dimension of the substrate is 0.125 mm
- the double-sided tape is offset with respect to the base material or the like, so that a portion that cannot be fixed by the double-sided tape occurs.
- the double-sided tape is attached to the end portion and the back side of the base material in a state of surrounding shape, and is fixed to a predetermined fixing portion via the double-sided tape.
- UV curable resin when touching on the cause of warping, in the key top structure, curing shrinkage occurs in the process of curing the uncured ultraviolet curable resin.
- a widely used ultraviolet curable resin in the case of a radical polymerization type ultraviolet curable resin having acrylate and unsaturated polyester as main components, curing shrinkage of about 5 to 10% occurs.
- the substrate is not excellent in stretchability. Therefore, if the ultraviolet curable resin is located on the surface side of the base material, the deformation is such that the surface side where the ultraviolet curable resin is located becomes concave as the ultraviolet curable resin is cured and contracted. Occurs.
- the keystroke timing is 3.3 times / second
- the load at the time of keystroke is 750 g
- a key sheet is arranged on the upper surface of the key top, and a keystroke test is performed via this key sheet. Is going.
- a keystroke test was performed using a disc spring-like member having a buckling load of 170 g.
- types 1 to 6 indicate the type (material) of the UV curable resin.
- These ultraviolet curable resins of types 1 to 6 are acrylate-based ultraviolet curable resins, and are adjusted to have respective measured hardnesses by changing the degree of polymerization or the crosslinking density.
- the molding die 101 is manufactured and the key top structure as the product is manufactured.
- the thickness dimension of the sheet-like portion is set to 0.03 mm in order to improve the click feeling (operation feeling) based on the results of Tables 4 and 5 described above.
- the thickness of the key top is set to 0.4 mm in view of the required key top height and FIG.
- a film-like substrate having a thickness of 0.05 mm is used.
- the liquid ultraviolet curable resin is cured by being irradiated with ultraviolet rays for about 20 seconds.
- the film-like base material is pulled and peeled at an angle of 35 degrees with respect to the state before peeling.
- Example preparation method First, in order to manufacture the key top member 61, H17 (trade name) having a Shore D hardness of 50 degrees made by Nogawa Chemical as described above was prepared as an ultraviolet curable resin. The ultraviolet curable resin was cured by the manufacturing method shown in FIGS. 3 and 4 to produce the key top member 61. At this time, the key top 61a is manufactured using the base material 110 made of polyethylene terephthalate (PET) (thickness: 0.05 mm). The key top member 61 thus manufactured has a Shore D hardness of 50 degrees. Further, a colored layer 62 having a thickness of 10 ⁇ m was formed on the back side of the key top member 61 using a polyester-based ink as a material.
- PET polyethylene terephthalate
- a pressing element 70 having a protruding dimension of 0.2 mm was formed on the back surface side of the key top member 61. Further, the disc spring-like member 73 is provided in contact with the pressing element 70. The disc spring-like member 73 is in a state having a protruding dimension (height dimension) of 0.26 mm from the surface of the substrate 71. Further, the buckling load of the disc spring-like member 73 is 170 g.
- Example 1 In such a state, while changing the thickness dimension S of the sheet-like portion 61b, the thickness dimension T of the key top 61a is not changed and is set to a fixed value of 0.4 mm, and the interval L between the key tops 61a is not changed. As a fixed value of 0.2 mm, the operational feeling and malfunction status of the key top structure 60 were evaluated according to the following criteria. ⁇ ... Easy to push in and no malfunction. ⁇ ... There is a sense of incongruity when pushing in, but there is no malfunction. ⁇ : There is a malfunction when pushing.
- Example 2 Next, while changing the distance L between the key tops 61a, the thickness dimension T of the key top 61a is not changed, but is set to a fixed value of 0.4 mm, and the thickness dimension S of the sheet-like portion 61b is not changed. Assuming 0.05 mm, the operational feeling of the key top structure 60 and the situation of malfunction were evaluated according to the following criteria. ⁇ ... Easy to push in and no malfunction. ⁇ ... There is a sense of incongruity when pushing in, but there is no malfunction. ⁇ : There is a malfunction when pushing.
- the thickness dimension S of the sheet-like portion 61b is in the range of 0.03 mm to 0.15 mm, and the predetermined interval L between the plurality of key tops 61a is 0.2 mm to 1. It is preferable to be within the range of 0 mm. In that case, the key top structure 60 is easy to push in and does not malfunction.
- Example 3 an example in which the Shore D hardness of the key top member 61 is changed is shown below.
- the thickness dimension T of the key top 61a is not changed and the fixed value is 0.4 mm
- the thickness dimension S of the sheet-like portion 61b is not changed and the fixed value is 0.05 mm
- the key tops 61a are The interval L is not changed
- the fixed value is 0.2 mm.
- the operational feeling of the key top structure 60 and the situation of malfunction were evaluated according to the following criteria. ⁇ ... Easy to push in and no malfunction. ⁇ ... There is a sense of incongruity when pushing in, but there is no malfunction. ⁇ : There is a malfunction when pushing.
- the deformation suppressing means in the claims is not configured. That is, the deformation suppressing means is realized for the first time by peeling the base material 110 from the key top member 61. That is, the key top member 61 contracts at the time of curing although the base material hardly contracts.
- Such deformation suppressing means for suppressing warpage and local deformation caused by shrinkage imbalance between the two members is embodied in the key top structure 60 by adding a step (labor) of peeling the base material 110. It can also be taken as.
- the thickness dimension S of the sheet-like portion 61b is in the range of 0.03 mm to 0.15 mm, and It can be said that when the predetermined distance L between the plurality of key tops 61a is in the range of 0.2 mm to 1.0 mm, it functions well as the deformation suppressing means.
- the Shore D hardness is in the range of 40 degrees to 80 degrees, it is possible to ensure a good function as a deformation suppressing means.
- the deformation permitting means in the claims functions well when the thickness dimension S of the sheet-like portion 61b is in the range of 0.03 mm to 0.15 mm.
- the thickness S of the sheet-like portion 61b is more preferably in the range of 0.03 mm to 0.10 mm, and even more preferably in the range of 0.03 mm to 0.05 mm.
- the deformation permitting means pushes only the disc spring-like member 73 (pressed object) of the pressed key top 61a when one of the key tops 61a is pressed from the top surface side, and the pressed key. It is preferable for the key top 61a other than the top 61a to be pushed independently so as not to push the disc spring-like member 73 (the pushing object).
- the ultraviolet curable resin contracts upon curing, but the key top member 61 is changed to the base material. Since the deformation suppressing means is realized by peeling 110, it is possible to suppress deformation due to shrinkage of the key top member 61 after curing. For this reason, it is possible to suppress deformation of the key top structure 60 so that the front surface side (the top surface side) is concave.
- the deformation suppression means is realized by peeling the base material 110 from the key top member 61 after the shrinkage after curing falls within a predetermined range, the key top structure 60 ( The key top member 61) is not bonded to a base material that is not excellent in stretchability. Therefore, when the user pushes the key top structure 60, it is possible to eliminate a state where the click feeling is not excellent.
- the key top member 61 may be peeled off from the base material 110.
- the base material 110 is peeled off to form the key top structure 60, such a problem can be eliminated.
- the portable terminal 10 as shown in FIG. 1 employs a key layout called a “quarty keyboard layout”, so that the number of key tops 61 is larger than that of a normal cellular phone device or the like. It has become.
- the area of the key top 61 is increased while arranging a large number (for example, 30 or more) of the key tops 61, and the finger is pressed well. If it is going to ensure the property, the space
- the key top structure 60 according to the present embodiment By applying the key top structure 60 according to the present embodiment to such a portable terminal 10, it is possible to suppress the deformation that the surface side of the key top structure 60 becomes concave as described above, while being excellent in the click feeling. In addition, the above-mentioned catching feeling can be eliminated.
- the thickness S of the sheet-like portion 61b is in the range of 0.03 mm to 0.15 mm, and the predetermined interval L between the plurality of key tops 61a is 0.2 mm to It is preferable to be within the range of 1.0 mm.
- the key top member 61 is provided with a Shore D hardness in the range of 40 degrees to 80 degrees. If comprised in this way, while being able to suppress more favorably the deformation
- the key top structure 60 pushes only the pushed object of the pushed key top 61a, and the pushed key. It is preferable to provide a deformation allowing means for allowing the key tops 61a other than the top 61a to be pushed independently so as not to push the object to be pushed.
- the housing portion 20 is provided with an installation site for installing the key top structure 60, and the installation site directly contacts or indirectly touches the key top structure 60. It is preferable to become a part of the component of the deformation
- the portion closer to the center than the end of each side of the key top 61 is outside (key It protrudes to the side away from the inside of the top 61.
- a key top 61 having a specified size is formed by curing shrinkage. Thereby, the key top 61 with little influence of curing shrinkage can be realized.
- the key top structure 60 may be manufactured as shown in FIG. That is, the base 110 is curved and brought into contact with the molding die 101 so that the top surface side of the key top member 61 is convex (for this purpose, the molding surface 101a of the molding die 101 is curved so as to be concave.
- the liquid ultraviolet curable resin M may be cured.
- the sheet-like portion 61b and the base material 110 are both kept substantially horizontal, horizontal, or horizontal during the curing. Can do.
- the degree of curvature of the base material 110 (the degree of curvature of the molding surface 101a) is substantially the same between the sheet-like portion 61b and the base material 110 at the time of curing due to shrinkage when the liquid ultraviolet curable resin M is cured. It is preferable to set it to a level that can be regarded as horizontal or horizontal or horizontal.
- the mobile terminal 10 as shown in FIG. 1 is used has been described.
- the mobile terminal is not limited to that shown in FIG.
- the present invention may be applied to a mobile phone device 10A as a kind of mobile terminal as shown in FIG. 12 includes a housing unit 20, a display unit 30, a cursor key unit 40, and a key arrangement unit 50, similarly to the mobile terminal 10 shown in FIG. .
- the cursor key portion 40 includes an annular button portion 41 and a center button portion 42.
- the cursor key portion 40 and the annular button portion 41 are opened from the opening of the housing portion 20 to a key top 61a (FIG. 2).
- the top side of (see) is protruding.
- the annular button portion 41 has a portion to be pressed at intervals of 90 degrees, for example.
- the center button portion 42 is a portion where a portion to be pressed (the top surface side of the key top 61 a) is surrounded by the annular button portion 41.
- the key arrangement unit 50 includes three key tops 61 a having the same shape, for example, three in the X direction and five in the Y direction.
- the shape of the top surface of the key top 61a is not limited to a flat shape, and may be other shapes (for example, a curved surface shape, a concave shape, a convex shape, a corrugated shape, etc.).
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Push-Button Switches (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
本実施の形態における携帯端末10は、図1に示すように、筐体部20と、表示部30と、カーソルキー部40と、キー配列部50とを備えている。なお、図1を始めとして、以下の説明においては、携帯端末10の長手方向をX方向、携帯端末10の短手方向をY方向、携帯端末10の厚み方向をZ方向として説明する。 <Overall configuration of mobile phone device>
As shown in FIG. 1, the
続いて、キートップ構造60の詳細について説明する。なお、以下の説明においては、キートップ構造60の一例として、キー配列部50に具現化されている、キートップ構造に関して、当該キー配列部50の構成の詳細も含めて説明する。また、カーソルキー部40の構成の詳細に関しては、キー配列部50の構成と同様であるため、その説明は省略する。 <Details of key top structure>
Next, details of the key
続いて、本実施の形態に係る、キートップ構造60の製造方法について説明する。図3は、キートップ構造60の製造方法の概略を説明するためのフローチャートである。また、図4は、キートップ構造60の製造方法について、成形金型101を中心として説明するための模式図である。 <About manufacturing method of key top structure>
Then, the manufacturing method of the key
[1.紫外線硬化型樹脂の必要性について]
射出成型によりキートップ構造を形成する場合、樹脂を金型に流し込んだ後に硬化させるが、当該成型上の制約から、たとえば0.3mm以下の厚み寸法でキートップを成型することは困難である、という成型上の制約がある。また、キートップ部材においては、金型における注入口およびそれ以降の流路等の樹脂を流し込むための部位の設計制約から、多数のキートップが連続している形状を成型することが難しく、千鳥状のキートップを形成し、その後、当該キートップを分離し、さらに組み立てることが必要となっている。 << Up to the realization of the key top structure in the present embodiment >>
[1. Necessity of UV curable resin]
When the key top structure is formed by injection molding, the resin is poured into a mold and cured, but due to restrictions on the molding, for example, it is difficult to mold the key top with a thickness dimension of 0.3 mm or less. There are restrictions on molding. In addition, in the key top member, it is difficult to mold a shape in which a large number of key tops are continuous due to the design restrictions of the parts for pouring resin such as the injection port in the mold and the flow path thereafter. It is necessary to form a key top that is shaped and then to separate and further assemble the key top.
ところで、現状、紫外線硬化型樹脂を用いて、キートップ部材としての成型品を作製する場合、基材とキートップ部材とが接着していることが必要となっている。これは、上述した製造方法にて述べたように、キートップ部材の窪みが存在している金型の上部に、フィルム状の基材を位置させ、必要とするキートップ部材の樹脂量よりも多めの液体状の紫外線硬化型樹脂を充填させ、その後、フィルム状の基材にスキージを接触させつつ移動させ、キートップ部材の裏面側となる部位において余分な液体状の紫外線硬化型樹脂を押し出すようにして形状を整え、その後硬化させ、キートップ部材として固化した成型品を成形金型から取り出している。 [3. About UV curable resin and substrate]
By the way, at present, when a molded product as a key top member is produced using an ultraviolet curable resin, it is necessary that the base material and the key top member are bonded. As described in the manufacturing method described above, this is because the film-like base material is positioned on the upper part of the mold where the depression of the key top member exists, and the amount of resin of the required key top member is larger than that. Fill with a large amount of liquid UV curable resin, and then move it while bringing the squeegee into contact with the film-like base material, and push out the excess liquid UV curable resin at the part on the back side of the key top member. In this way, the molded product that has been shaped and then cured and solidified as a key top member is taken out from the molding die.
なお、基材の厚み寸法を0.05mm~0.15mmの間で変化させて、それぞれの厚み寸法のときに押圧に要する荷重、およびクリック感について測定した実験結果を、表1に示す。ここで、クリック感を示す指標値であるクリック率(%)とは、同一の皿バネ状部材を使用したときに、以下の式で定義される値(%)である。なお、Cはクリック率(%)、Pはピーク荷重(単位:グラム)、Bはボトム荷重(単位:グラム)を示す。また、ピーク荷重は、皿バネ状部材が座屈する前の最大荷重を示し、ボトム荷重は、皿バネ状部材が座屈した後にその座屈状態を保てる最小の荷重を示す。また、このときの基材の材質はポリエチレンテレフタレート(PET)である。
C=100×(P-B)/P [4. Experimental results of key top structure with base material]
Table 1 shows the experimental results of measuring the load required for pressing and the click feeling when the thickness dimension of the base material was changed between 0.05 mm and 0.15 mm. Here, the click rate (%), which is an index value indicating the click feeling, is a value (%) defined by the following equation when the same disc spring-like member is used. C represents the click rate (%), P represents the peak load (unit: grams), and B represents the bottom load (unit: grams). The peak load indicates the maximum load before the disc spring-like member buckles, and the bottom load indicates the minimum load that can maintain the buckled state after the disc spring-like member buckles. The material of the base material at this time is polyethylene terephthalate (PET).
C = 100 × (P−B) / P
以上の表1~表3の実験結果によると、基材の厚み寸法が0.05mmの場合、比較的良好なクリック感(操作感)を得ることができた。一方、基材の厚み寸法が0.1mmから0.125mmと、厚み寸法が大きくなるにつれて、クリック感(操作感)は悪化している。特に、0.125mm以上の厚み寸法を有する基材においては、皿バネ状部材での荷重の変化をさほど感じさせないまでに、クリック時に要する合計荷重が増大している。 [5. Consideration from experimental results of key top structure with base material]
According to the above experimental results in Tables 1 to 3, when the thickness dimension of the substrate was 0.05 mm, a relatively good click feeling (operation feeling) could be obtained. On the other hand, as the thickness dimension of the base material increases from 0.1 mm to 0.125 mm, the click feeling (operation feeling) deteriorates. In particular, in a base material having a thickness dimension of 0.125 mm or more, the total load required at the time of clicking is increased until the change in load on the disc spring-like member is not felt so much.
そこで、これまでの手法とは発想を変えて、全く別のアプローチを採る手法を模索した。この模索の中で、理論的に基材の厚み寸法が最も薄くなる、基材を無くする、という手法を採ることが検討された。なお、現状、キートップ構造において、このアプローチを他人が採用している事実は確認されなかった。これは、現状の紫外線硬化型樹脂を用いた成型品の作製においては、紫外線硬化型樹脂の硬化に際して、基準となる部位が定まらない等の原因により基材の存在が必須であることに加えて、上述の表2等から分かるように、基材の厚み寸法を大きくするというアプローチを採ると反りがある程度低減可能であるため、基材の厚み寸法を大きくする、という発想に縛られる可能性があるためとも思われる。 [6. Trial of new method]
Therefore, we searched for a method that changed the way of thinking from the conventional method and took a completely different approach. In this search, it was considered to adopt a method in which the thickness of the base material is theoretically the smallest and the base material is eliminated. In the current situation, the fact that others have adopted this approach in the key top structure has not been confirmed. This is because, in the production of a molded product using the current ultraviolet curable resin, in addition to the presence of a base material is essential for the curing of the ultraviolet curable resin due to the fact that the reference site is not determined. As can be seen from Table 2 above, since the warp can be reduced to some extent by taking the approach of increasing the thickness dimension of the base material, there is a possibility of being bound by the idea of increasing the thickness dimension of the base material. It seems to be because there is.
この検討において、紫外線硬化型樹脂の成型品であるキートップ部材のシート状部の厚み寸法を0.03mm~0.15mmの間で変化させて、それぞれの厚み寸法のときに押圧に要する荷重、およびクリック感について測定した実験結果を、表4に示す。なお、この実験においては、紫外線硬化型樹脂の材料として、ノガワケミカル製のショアーD硬度が50度であるH17(商品名)を用いている。 [7. Examination of new method from thickness dimension]
In this study, the thickness of the sheet-like portion of the key top member, which is a molded product of an ultraviolet curable resin, is changed between 0.03 mm and 0.15 mm, and the load required for pressing at each thickness dimension, Table 4 shows the experimental results measured for the click feeling. In this experiment, H17 (trade name) manufactured by Nogawa Chemical and having a Shore D hardness of 50 degrees is used as the material of the ultraviolet curable resin.
続いて、キートップ構造を実機に搭載する場合、その耐久性も考慮する必要がある。特に、最も薄いシート状部の厚み寸法が薄くなればなる程、耐久性には不安が残る状態となる。そこで、上述の表4におけるそれぞれの厚み寸法のものに対して、打鍵試験を実施して、最も薄いシート状部の破れが生じる打鍵回数を確認する実験を行った。なお、かかる打鍵試験において用いた皿バネ状部材の座屈荷重も、併せて記している。また、本実験においては、3.3回/秒の打鍵タイミングで行っており、打鍵時の荷重を750gとし、またキートップの上面にキーシートを配置し、このキーシートを介して打鍵試験を行っている。また、座屈荷重が170gの皿バネ状部材を用いて、打鍵試験を行った。 [8. Examination from the aspect of durability of the new method]
Subsequently, when the key top structure is mounted on an actual machine, it is necessary to consider its durability. In particular, as the thickness dimension of the thinnest sheet-like portion becomes thinner, there is a state in which anxiety remains about durability. Therefore, an experiment was conducted to confirm the number of keystrokes at which the thinnest sheet-like portion was torn by performing a keystroke test on each thickness dimension in Table 4 above. In addition, the buckling load of the disc spring-like member used in the keying test is also shown. In this experiment, the keystroke timing is 3.3 times / second, the load at the time of keystroke is 750 g, and a key sheet is arranged on the upper surface of the key top, and a keystroke test is performed via this key sheet. Is going. Further, a keystroke test was performed using a disc spring-like member having a buckling load of 170 g.
続いて、上述の表5に基づいて、0.03mm~0.15mmの厚み寸法の範囲内で、紫外線硬化型樹脂の成分構成を変化させて、実際の製品として使用可能か否か(製品へ適用可能か否か)を検討した結果、以下の表6のようになった。なお、表6中の「750g荷重下の打鍵試験で製品へ適用可能か否か」については、25万回の打鍵試験を行ってもなお破れが生じない場合に、製品へ適用可能であるとして「○」で示し、25万回以内の打鍵試験にて破れが生じた場合には、製品へ適用可能でないとして「×」で示している。また、表6中の「10kg荷重下の打鍵試験で製品へ適用可能か否か」については、5千回の打鍵試験を行ってもなお破れが生じない場合に、製品へ適用可能であるとして「○」で示し、5千回以内の打鍵試験にて破れが生じた場合には、製品へ適用可能でないとして「×」で示している。 [9. Examination from the aspect of composition of new method]
Subsequently, based on Table 5 above, whether or not it can be used as an actual product by changing the component composition of the ultraviolet curable resin within the thickness range of 0.03 mm to 0.15 mm (to the product) As a result of examining whether or not it is applicable, the result is as shown in Table 6 below. Note that “whether or not it is applicable to a product in a keystroke test under a load of 750 g” in Table 6 is applicable to a product if no tearing occurs even after performing a keystroke test of 250,000 times. In the case where a break occurs in the keystroke test within 250,000 times, it is indicated as “X” because it is not applicable to the product. In addition, in Table 6, “whether or not the product can be applied to a keystroke test under a 10 kg load” is applicable to a product if no breakage occurs even after 5,000 keystroke tests. If a break occurs in the keystroke test within 5,000 times, it is indicated as “x” because it is not applicable to the product.
以上の実験結果、考察結果に基づいて、成形金型101を作製し、製品となるキートップ構造の製造を実施している。この製造においては、上述の表4、表5の結果に基づき、クリック感(操作感)を良好にするために、シート状部の厚み寸法を0.03mmとしている。また、キートップの厚み寸法は、要求されるキートップの高さと図7等に鑑みて、0.4mmとしている。また、かかるキートップ構造を製造する場合、フィルム状の基材として、厚み寸法が0.05mmのものを用いている。また、図3のS04においては、液状の紫外線硬化型樹脂に対して、20秒ほど紫外線を照射して硬化させている。また、図3のS06においては、セパレーター機を用いて、フィルム状の基材を、剥がす前の状態に対して35度の角度をなすように引っ張って剥離させている。 [10. Regarding actual manufacturing]
Based on the above experimental results and consideration results, the molding die 101 is manufactured and the key top structure as the product is manufactured. In this manufacture, the thickness dimension of the sheet-like portion is set to 0.03 mm in order to improve the click feeling (operation feeling) based on the results of Tables 4 and 5 described above. The thickness of the key top is set to 0.4 mm in view of the required key top height and FIG. When manufacturing such a key top structure, a film-like substrate having a thickness of 0.05 mm is used. In S04 of FIG. 3, the liquid ultraviolet curable resin is cured by being irradiated with ultraviolet rays for about 20 seconds. Moreover, in S06 of FIG. 3, using a separator machine, the film-like base material is pulled and peeled at an angle of 35 degrees with respect to the state before peeling.
続いて、上述のような構成を有するキートップ構造60の、押し込む際の動作に関する評価(実施例)について説明する。 <About Examples>
Next, an evaluation (example) regarding the operation when the key
まず、キートップ部材61を製造するために、紫外線硬化型樹脂として、上述したノガワケミカル製のショアーD硬度が50度であるH17(商品名)を準備した。かかる紫外線硬化型樹脂を、上述の図3、図4に示す製造方法によって硬化させて、キートップ部材61を作製した。このとき、基材110として、ポリエチレンテレフタレート(PET)を材質とするもの(厚み寸法0.05mm)を用いて、キートップ61aを作製している。作製されたキートップ部材61は、ショアーD硬度が50度のものである。また、このキートップ部材61の裏面側に、ポリエステル系のインクを材質として、厚み寸法が10μmの着色層62を形成した。 (Sample preparation method)
First, in order to manufacture the key
このような状態において、シート状部61bの厚み寸法Sを変化させつつ、キートップ61aの厚み寸法Tは変化させずに固定値0.4mmとし、かつキートップ61a同士の間隔Lは変化させずに固定値0.2mmとして、キートップ構造60の操作感および誤動作の状況を以下の基準で評価した。
◎・・・押し込み易く、誤動作がない。
○・・・押し込む際に違和感があるが誤動作はない。
△・・・押し込む際に誤動作がある。 Example 1
In such a state, while changing the thickness dimension S of the sheet-
◎ ... Easy to push in and no malfunction.
○ ... There is a sense of incongruity when pushing in, but there is no malfunction.
Δ: There is a malfunction when pushing.
次に、キートップ61a同士の間隔Lを変化させつつ、キートップ61aの厚み寸法Tは変化させずに固定値0.4mmとし、かつシート状部61bの厚み寸法Sは変化させずに固定値0.05mmとして、キートップ構造60の操作感および誤動作の状況を以下の基準で評価した。
◎・・・押し込み易く、誤動作がない。
○・・・押し込む際に違和感があるが誤動作はない。
△・・・押し込む際に誤動作がある。 (Example 2)
Next, while changing the distance L between the
◎ ... Easy to push in and no malfunction.
○ ... There is a sense of incongruity when pushing in, but there is no malfunction.
Δ: There is a malfunction when pushing.
次に、キートップ部材61のショアーD硬度を変化させた場合の実施例を、以下に示す。この実施例では、キートップ61aの厚み寸法Tは変化させずに固定値0.4mmとし、シート状部61bの厚み寸法Sは変化させずに固定値0.05mmとすると共に、キートップ61a同士の間隔Lも変化させずに固定値0.2mmとしている。そして、キートップ構造60の操作感および誤動作の状況を以下の基準で評価した。
◎・・・押し込み易く、誤動作がない。
○・・・押し込む際に違和感があるが誤動作はない。
△・・・押し込む際に誤動作がある。 (Example 3)
Next, an example in which the Shore D hardness of the key
◎ ... Easy to push in and no malfunction.
○ ... There is a sense of incongruity when pushing in, but there is no malfunction.
Δ: There is a malfunction when pushing.
以上のような構成のキートップ構造60、携帯端末10(電子機器)およびキートップ構造60の製造方法によれば、紫外線硬化型樹脂は、その硬化に際して収縮するが、キートップ部材61から基材110を剥がすことによって、変形抑制手段が具現化されているため、キートップ部材61の硬化後の収縮による変形を抑制することが可能となる。そのため、キートップ構造60の表面側(天面側)が凹となるように変形することを抑えることが可能となる。 <Effect>
According to the manufacturing method of the key
以上、本発明の一実施の形態に係る、キートップ構造60、電子機器の一例としての携帯端末10およびキートップ構造60の製造方法について説明したが、本発明はこれ以外にも種々変形可能となっている。以下、それについて述べる。 <Modification>
As described above, the key
20…筐体部
30…表示部
40…カーソルキー部
50…キー配列部
60…キートップ構造
61…キートップ部材
61a…キートップ
61b…シート状部
62…着色層
70…押圧子
71…基板
72a、72b…固定接点
73…皿バネ状部材(押し込み対象物の一例に対応)
100…製造装置
101…成形金型
101a…成形面
102…送りローラ
103…凹部
105…紫外線照射装置
M…紫外線硬化型樹脂 10 ... Mobile terminal (corresponds to an example of electronic equipment)
DESCRIPTION OF
DESCRIPTION OF SYMBOLS 100 ...
Claims (13)
- 液体状の紫外線硬化型樹脂を成形金型の凹部に注入し、
上記凹部に注入された上記紫外線硬化型樹脂を覆い、かつ紫外線硬化型樹脂に密着する状態で基材を位置させ、
液体状の上記紫外線硬化型樹脂に対して紫外線の照射を行って、上記紫外線硬化型樹脂を硬化させ、
上記成形金型から上記基材と上記キートップ部材の一体物を取り外し、
その後、上記基材と上記キートップ部材の一体物から上記基材を剥がすことにより、シート状部と、所定の間隔で列状に配置されると共に上記シート状部よりも厚み寸法が大きいキートップ部材を構成し、
上記キートップ部材を有することを特徴とするキートップ構造。 Inject liquid UV curable resin into the recess of the mold,
Cover the ultraviolet curable resin injected into the recess, and position the substrate in close contact with the ultraviolet curable resin,
Irradiation of ultraviolet rays to the liquid ultraviolet curable resin to cure the ultraviolet curable resin,
Remove the base material and the key top member from the molding die,
After that, the base material is peeled off from the integrated body of the base material and the key top member, thereby arranging the sheet-like portions and the key tops arranged in rows at predetermined intervals and having a thickness dimension larger than that of the sheet-like portion. Composing the components,
A key top structure comprising the key top member. - 請求項1記載のキートップ構造であって、
液体状の前記紫外線硬化型樹脂のうち前記キートップに対応する部分の少なくとも一辺について、その辺の端部よりも中央寄りの部位が、前記キートップの内部から離間する側に突出していて、
硬化後の前記キートップ部材においては、前記キートップを構成する上記一辺は、前記キートップの内部から離間する側への突出が硬化収縮により解消されて直線状を為している、
ことを特徴とするキートップ構造。 The key top structure according to claim 1,
About at least one side of the portion corresponding to the key top in the liquid ultraviolet curable resin, a portion closer to the center than the end of the side protrudes to the side away from the inside of the key top,
In the key top member after curing, the one side constituting the key top has a linear shape with the protrusion to the side away from the inside of the key top being eliminated by curing shrinkage,
Key top structure characterized by that. - 紫外線硬化型樹脂を硬化することによりシート状部と複数のキートップとが形成されると共に、上記キートップは上記シート状部よりも厚み寸法が大きく設けられ、かつ複数の上記キートップが所定の間隔を有する状態で列状に配置されている部分を有するキートップ部材と、
基材に対して上記紫外線硬化型樹脂を硬化させて上記キートップ部材を形成する際に、上記キートップ部材の硬化後の収縮による変形を抑制するための変形抑制手段と、
を具備することを特徴とするキートップ構造。 By curing the ultraviolet curable resin, a sheet-like portion and a plurality of key tops are formed, and the key top is provided with a thickness dimension larger than that of the sheet-like portion, and the plurality of key tops are predetermined. A key top member having portions arranged in a row in a state having an interval;
Deformation suppression means for suppressing deformation due to shrinkage after curing of the keytop member when forming the keytop member by curing the ultraviolet curable resin with respect to the substrate;
A key top structure characterized by comprising: - 請求項3記載のキートップ構造であって、
前記変形抑制手段は、前記キートップ部材の硬化後の収縮が所定範囲内に収まった後に、前記基材を前記キートップ部材から剥がすことにより構成されている、
ことを特徴とするキートップ構造。 The key top structure according to claim 3,
The deformation suppressing means is configured by peeling the base material from the key top member after the shrinkage after curing of the key top member is within a predetermined range.
Key top structure characterized by that. - 請求項1から4のいずれか1項に記載のキートップ構造であって、
前記シート状部の厚み寸法は、0.03mm~0.15mmの範囲内であると共に、複数の前記キートップの間の所定の間隔は、0.2mm~1.0mmの範囲内であることを特徴とするキートップ構造。 The key top structure according to any one of claims 1 to 4,
The thickness dimension of the sheet-like portion is in the range of 0.03 mm to 0.15 mm, and the predetermined interval between the plurality of key tops is in the range of 0.2 mm to 1.0 mm. Key top structure that is characteristic. - 紫外線硬化型樹脂を硬化することによりシート状部と複数のキートップとが形成されると共に、上記キートップは上記シート状部よりも厚み寸法が大きく設けられ、かつ複数の上記キートップが所定の間隔を有する状態で列状に配置されている部分を有するキートップ部材を具備し、
上記シート状部の厚み寸法は、0.03mm~0.15mmの範囲内であると共に、複数の上記キートップの間の所定の間隔は、0.2mm~1.0mmの範囲内である、
ことを特徴とするキートップ構造。 By curing the ultraviolet curable resin, a sheet-like portion and a plurality of key tops are formed, and the key top is provided with a thickness dimension larger than that of the sheet-like portion, and the plurality of key tops are predetermined. Comprising a key top member having portions arranged in a row in a state having an interval;
The thickness dimension of the sheet-like portion is in the range of 0.03 mm to 0.15 mm, and the predetermined interval between the plurality of key tops is in the range of 0.2 mm to 1.0 mm.
Key top structure characterized by that. - 請求項5記載のキートップ構造であって、
前記キートップ部材は、ショアーD硬度が、40度~80度の範囲内に設けられていることを特徴とするキートップ構造。
The key top structure according to claim 5,
The key top structure is characterized in that the Shore D hardness is provided in a range of 40 degrees to 80 degrees.
- 請求項6記載のキートップ構造であって、
前記キートップ部材は、ショアーD硬度が、40度~80度の範囲内に設けられていることを特徴とするキートップ構造。
The key top structure according to claim 6,
The key top structure is characterized in that the Shore D hardness is provided in a range of 40 degrees to 80 degrees.
- 請求項1記載のキートップ構造であって、
前記キートップ部材は、いずれかの前記キートップをその天面側から押し込んだ場合に、押し込まれた前記キートップの押し込み対象物のみを押し込み、かつ押し込まれた前記キートップ以外の他の前記キートップが上記押し込み対象物を押し込むことがない程度に独立して押し込ませるための変形許容手段を備える、
ことを特徴とするキートップ構造。
The key top structure according to claim 1,
The key top member, when any one of the key tops is pushed in from the top surface side, pushes only the pushing object of the pushed key top, and the other key other than the pushed key top. A deformation allowing means for allowing the top to be pushed independently so as not to push the pushing object;
Key top structure characterized by that.
- 請求項3記載のキートップ構造であって、
前記キートップ部材は、いずれかの前記キートップをその天面側から押し込んだ場合に、押し込まれた前記キートップの押し込み対象物のみを押し込み、かつ押し込まれた前記キートップ以外の他の前記キートップが上記押し込み対象物を押し込むことがない程度に独立して押し込ませるための変形許容手段を備える、
ことを特徴とするキートップ構造。
The key top structure according to claim 3,
The key top member, when any one of the key tops is pushed in from the top surface side, pushes only the pushing object of the pushed key top, and the other key other than the pushed key top. A deformation allowing means for allowing the top to be pushed independently so as not to push the pushing object;
Key top structure characterized by that.
- 請求項6記載のキートップ構造であって、
前記キートップ部材は、いずれかの前記キートップをその天面側から押し込んだ場合に、押し込まれた前記キートップの押し込み対象物のみを押し込み、かつ押し込まれた前記キートップ以外の他の前記キートップが上記押し込み対象物を押し込むことがない程度に独立して押し込ませるための変形許容手段を備える、
ことを特徴とするキートップ構造。 The key top structure according to claim 6,
The key top member, when any one of the key tops is pushed in from the top surface side, pushes only the pushing object of the pushed key top, and the other key other than the pushed key top. A deformation allowing means for allowing the top to be pushed independently so as not to push the pushing object;
Key top structure characterized by that. - 請求項3または4記載のキートップ構造を備えると共に、
前記キートップ部材を設置するための設置部位を有し、
この設置部位は、前記キートップ部材に直接的に接触または間接的に接触することにより、前記変形抑制手段の構成要素の一部となる、
ことを特徴とする電子機器。 A key top structure according to claim 3 or 4 is provided,
An installation site for installing the key top member;
This installation site becomes a part of the component of the deformation suppressing means by directly contacting or indirectly contacting the key top member.
An electronic device characterized by that. - 液体状の紫外線硬化型樹脂を成形金型の凹部に注入する注入工程と、
上記凹部に注入された上記紫外線硬化型樹脂を覆い、かつ紫外線硬化型樹脂に密着する状態で基材を位置させる設置工程と、
液体状の上記紫外線硬化型樹脂に対して紫外線の照射を行って、上記紫外線硬化型樹脂を所定だけ硬化させてキートップ部材を作製する硬化工程と、
上記成形金型から上記基材と上記キートップ部材の一体物を取り外す取り外し工程と、
上記基材と上記キートップ部材の一体物から上記基材を剥がす剥がし工程と、
を有することを特徴とするキートップ構造の製造方法。 An injection step of injecting a liquid UV curable resin into the recess of the molding die;
An installation step of covering the ultraviolet curable resin injected into the recess and positioning the base material in close contact with the ultraviolet curable resin;
A curing step of irradiating the liquid ultraviolet curable resin with ultraviolet rays to cure the ultraviolet curable resin by a predetermined amount to produce a key top member;
A removal step of removing the integrated body of the base material and the key top member from the molding die,
A peeling step of peeling the base material from an integral body of the base material and the key top member;
A method for manufacturing a key top structure, comprising:
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080059571.2A CN102714105B (en) | 2009-12-28 | 2010-12-27 | Key-top structure and electronic device |
KR1020127018969A KR101347426B1 (en) | 2009-12-28 | 2010-12-27 | Key-top structure, electronic device, and method of manufacturing key-top structure |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009298322A JP5330220B2 (en) | 2009-12-28 | 2009-12-28 | KEYTOP STRUCTURE, ELECTRONIC DEVICE, AND KEYTOP STRUCTURE MANUFACTURING METHOD |
JP2009-298322 | 2009-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011081148A1 true WO2011081148A1 (en) | 2011-07-07 |
Family
ID=44226552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/073598 WO2011081148A1 (en) | 2009-12-28 | 2010-12-27 | Key-top structure, electronic device, and method of manufacturing key-top structure |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP5330220B2 (en) |
KR (1) | KR101347426B1 (en) |
CN (1) | CN102714105B (en) |
WO (1) | WO2011081148A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101728894B1 (en) | 2015-07-27 | 2017-04-20 | 김용래 | Assembling frame structure |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH065151A (en) * | 1992-06-22 | 1994-01-14 | Fuji Porimatetsuku Kk | Manufacture of key sheet with transparent resin key top |
JP2007123231A (en) * | 2005-09-28 | 2007-05-17 | Shin Etsu Polymer Co Ltd | Cover member for push-button switch |
JP2009110778A (en) * | 2007-10-29 | 2009-05-21 | Sunarrow Ltd | Key sheet |
JP2009135083A (en) * | 2007-08-28 | 2009-06-18 | Yamaguchi Tokushu Insatsu:Kk | Method of manufacturing keytop film, and keytop film manufacturing machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4326190B2 (en) * | 2002-07-10 | 2009-09-02 | スリーエム イノベイティブ プロパティズ カンパニー | Flexible mold and manufacturing method thereof |
JP4679226B2 (en) * | 2004-10-28 | 2011-04-27 | ポリマテック株式会社 | Cover sheet for pushbutton switch |
JP4473752B2 (en) * | 2005-03-04 | 2010-06-02 | ポリマテック株式会社 | Cover sheet for pushbutton switch |
JP2009009735A (en) * | 2007-06-26 | 2009-01-15 | Shin Etsu Polymer Co Ltd | Manufacturing method of keytop member |
-
2009
- 2009-12-28 JP JP2009298322A patent/JP5330220B2/en not_active Expired - Fee Related
-
2010
- 2010-12-27 KR KR1020127018969A patent/KR101347426B1/en not_active IP Right Cessation
- 2010-12-27 WO PCT/JP2010/073598 patent/WO2011081148A1/en active Application Filing
- 2010-12-27 CN CN201080059571.2A patent/CN102714105B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH065151A (en) * | 1992-06-22 | 1994-01-14 | Fuji Porimatetsuku Kk | Manufacture of key sheet with transparent resin key top |
JP2007123231A (en) * | 2005-09-28 | 2007-05-17 | Shin Etsu Polymer Co Ltd | Cover member for push-button switch |
JP2009135083A (en) * | 2007-08-28 | 2009-06-18 | Yamaguchi Tokushu Insatsu:Kk | Method of manufacturing keytop film, and keytop film manufacturing machine |
JP2009110778A (en) * | 2007-10-29 | 2009-05-21 | Sunarrow Ltd | Key sheet |
Also Published As
Publication number | Publication date |
---|---|
CN102714105A (en) | 2012-10-03 |
JP2011138702A (en) | 2011-07-14 |
CN102714105B (en) | 2014-12-17 |
KR101347426B1 (en) | 2014-01-02 |
KR20120106831A (en) | 2012-09-26 |
JP5330220B2 (en) | 2013-10-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1876621B1 (en) | Key sheet and pushbutton switch | |
US7829810B2 (en) | Pushbutton switch cover sheet | |
JP5080303B2 (en) | Key sheet | |
US7465889B2 (en) | Pushbutton switch cover sheet and method of manufacturing the same | |
EP1788600A2 (en) | Key sheet | |
JP2007213874A (en) | Key base, key sheet and method for forming key base | |
US8022324B2 (en) | Method of manufacturing a keypad structure having a transparent keycap and keypad structure having a transparent keycap | |
TW201044431A (en) | Mechanical keypad with touch pad function | |
EP2015329B1 (en) | Key sheet | |
EP1721326A1 (en) | Switches | |
JP2008016187A (en) | Key sheet and push-button switch | |
JP2008140755A (en) | Sheet member for operation switch, operation switch, and manufacturing method of sheet member for operation switch | |
JP2011204616A (en) | Keypad, electronic equipment, and method of manufacturing the key pad | |
WO2007018256A1 (en) | Thin key sheet and process for production thereof | |
JP5330220B2 (en) | KEYTOP STRUCTURE, ELECTRONIC DEVICE, AND KEYTOP STRUCTURE MANUFACTURING METHOD | |
US20100193343A1 (en) | Key sheet and method for manufacturing the same | |
JP2011243555A (en) | Keypad plunger structure and method of manufacturing the same | |
US20090166931A1 (en) | Process for manufacturing keypad modules of non-backlighted panels | |
JP2011175815A (en) | Key pad, method of manufacturing the same, and electronic equipment having the same | |
KR20110035051A (en) | Key pad for mobile | |
US20120206361A1 (en) | Keypad having a metal grid for use with a portable electronic device | |
KR200459343Y1 (en) | Keypad Assembly for mobile phone | |
JP2008159346A (en) | Portable electronic equipment | |
EP2490105A1 (en) | Keypad having a metal grid for use with a portable electronic device | |
KR20090050729A (en) | Keypad having light guide and method of manufacturing thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080059571.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10841004 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 20127018969 Country of ref document: KR Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10841004 Country of ref document: EP Kind code of ref document: A1 |