CN102714105B - Key-top structure and electronic device - Google Patents
Key-top structure and electronic device Download PDFInfo
- Publication number
- CN102714105B CN102714105B CN201080059571.2A CN201080059571A CN102714105B CN 102714105 B CN102714105 B CN 102714105B CN 201080059571 A CN201080059571 A CN 201080059571A CN 102714105 B CN102714105 B CN 102714105B
- Authority
- CN
- China
- Prior art keywords
- key head
- parts
- curing resin
- ultraviolet curing
- base material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- H01H13/70—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
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Push-Button Switches (AREA)
- Manufacture Of Switches (AREA)
Abstract
Disclosed is a key-top structure, an electronic device, and a method of manufacturing the key-top structure, wherein a clicking feeling upon pushing-in the key-top structure is excellent, or wherein deformation of a key-top member that takes place when manufacturing the key-top member by hardening ultraviolet-curing resin can be alleviated. The key-top structure (60) is provided with: the key-top member (61), wherein a sheet-formed section (61b) and a plurality of key-tops (61a) are formed by hardening ultraviolet curing resin, the key-tops (61a) are made to have a greater thickness dimension (T) than the sheet-formed section (61b), and a section exists therein where the plurality of key-tops (61a) are arranged in row-form with a prescribed gap given therebetween; and a deformation alleviating means for alleviating deformation due to contraction of the key-top member (61) after the hardening thereof, when forming the key-top member (61) by hardening ultraviolet curing resin onto a base material.
Description
Technical field
The present invention relates to key head structure and electronic equipment.
Background technology
Be used in the key head structure in the electronic equipments such as portable telephone set, general great majority use technology as following, namely, application ink on resin formed article, and/or implement banding of text printout etc., then, in order to be formed by a succession of key head structure formed, and using bonding for this resin formed article and be arranged on film or silicon rubber that the PETG (PET) as flexible substrate makes.In addition, recently in order to tackle the slimming requirement centered by the mobile terminals such as portable telephone set, and use following key head structure, namely, ultraviolet curing resin is shaped by the base material of film-form, and the back side of film-form base material is implemented printing and/or banded.
As the technology for the manufacture of such key head structure, there is technology disclosed in patent documentation 1.
Patent documentation 1: No. 2009-135083, JP Publication, JP
Summary of the invention
But, key head portion is formed in the face side (top surface side) utilizing method disclosed in above-mentioned patent documentation 1 at base material, and then form dyed layer in the rear side of base material, and when using as the key head structure of member for push-button switch, there is following such problem.
First, because PETG (PET) that base material is formed to be extended by twin shaft etc. is as material, therefore, retractility is not good.Therefore, the click feel (click feeling) not good (the first problem) when user's pressing key header structure.
In addition, when utilizing method disclosed in patent documentation 1 to form key head structure on the surface of base material, manufacture contraction during key head parts owing to making ultraviolet curing resin solidify, key head malformation is face side (top surface side) concavely (key head structure warpage; Second problem).At this, in order to suppress this distortion, the method adopting the gauge increasing base material can be considered.But, even if when adding the gauge of base material, due to the reason of adhesive tape for fixing (two-sided tape) skew etc., usually there is the part not being fixed and fixing with adhesive tape in the end of base material.Therefore, produce the distortion (local deformation) of locality in the end of this base material, such as when button operation with hand touch etc. also can feel cause because of local deformation block sense.At this, when the end of generation being blocked to sense is applied above the peeling force estimated, there is the possibility that ultraviolet curing resin is peeled off from base material.
In addition, when making base material thickening, when pressing key head, base material becomes and is difficult to distortion, thus also should not as key head structure.
The present invention is made based on above-mentioned situation, its object is to, solve at least one problem in the first problem and the second problem, and click feel is outstanding when providing a kind of pressing key header structure, or, when manufacturing key head parts enabling ultraviolet curing resin solidify, suppress the manufacture method of the key head structure of the distortion of these key head parts, electronic equipment and key head structure.
In order to solve above-mentioned problem, the first aspect of key head structure of the present invention is, aqueous ultraviolet curing resin is injected in the recess of forming metal mould, the ultraviolet curing resin be injected in recess is covered and arranges base material with the state that ultraviolet curing resin is combined closely, Ultraviolet radiation is carried out to aqueous ultraviolet curing resin and ultraviolet curing resin is solidified, the unitary member of base material and key head parts is removed from forming metal mould, then, base material is peeled off from the unitary member parts of base material and key head parts, form plate-like portion and key head thus, and, above-mentioned key head structure has this key head parts, wherein, above-mentioned key head is configuration in column-like manner at predetermined intervals and gauge is greater than plate-like portion.
When forming like this, ultraviolet curing resin shrinks when solidifying, but, by being peeled off from unitary member by base material, the contraction after because of the solidification of these key head parts can be suppressed and the distortion that causes.Therefore, it is possible to suppress the face side (top surface side) of key head parts to be deformed into concavity.In addition, by being peeled off by base material, the local deformation produced in the end of key head parts can be eliminated, thus can be formed as such as when button operation with hand touch etc. also imperceptible cause because of local deformation block sense.At this, when feel cause because of local deformation block sense, when to produce the end of blocking sense be applied above the peeling force estimated time, there is the danger that key head parts are peeled off from base material, but, in the present invention, such unfavorable condition can be eliminated by being peeled off by base material.
In addition, other aspects of key head structure of the present invention are in the present invention as stated above, in at least one side of part corresponding with key head preferably in aqueous ultraviolet curing resin, end of comparing on this limit is given prominence to towards the side away from key head inside closer to the position of central authorities, and, in key head parts after hardening, form key head on, be eliminated towards the projecting through cure shrinkage of side away from key head inside, thus this limit is linearly.
When forming like this, in the cure shrinkage of uncured ultraviolet curing resin, key head at least can maintain linearity.Therefore, it is possible to the key head that the impact realizing cure shrinkage is little.
In addition, other aspects of key head structure of the present invention are, possess key head parts and deformation suppression section part, wherein, above-mentioned key head parts are by being solidified to form plate-like portion and multiple key head by ultraviolet curing resin, and the gauge being configured to key head is greater than plate-like portion, and there is multiple key head there is the state of predetermined distance in the part configured in column-like manner; When above-mentioned deformation suppression section part is used for making ultraviolet curing resin solidify and form key head parts relative to base material, suppress the contraction after because of the solidification of key head parts and the distortion that causes.
When forming like this, although ultraviolet curing resin shrinks when solidifying, due to the existence of deformation suppression section part, the contraction after because of the solidification of key head parts can be suppressed and the distortion that causes.Therefore, it is possible to suppress the face side (top surface side) of key head structure to be deformed into concavity.
In addition, other aspects of key head structure of the present invention are in the present invention as stated above, and base material is peeled off from key head parts after being in prescribed limit by the contraction after the solidification of key head parts and forms by advantageous version suppression component.
When forming like this, because deformation suppression section part is peeled off from key head parts by base material after contraction is after hardening in prescribed limit and forms, therefore, become the state not being bonded with the not good base material of retractility on key head parts.Therefore, it is possible to the state that when eliminating user's pressing key header structure, click feel is not good.
And then other aspects of key head structure of the present invention are in the present invention as stated above, the gauge of preferred plate-like portion is in the scope of 0.03mm ~ 0.15mm, and the predetermined distance between multiple key head is 0.2mm ~ 1.0mm.
When forming like this, the contraction after because of the solidification of key head parts can be suppressed better and the distortion that causes, and, click feel during user's pressing key header structure can be made outstanding.
In addition, other aspects of key head structure of the present invention are, preferably possess key head parts, the gauge of plate-like portion is in the scope of 0.03mm ~ 0.15mm, and the predetermined distance between multiple key head is in the scope of 0.2mm ~ 1.0mm, wherein, above-mentioned key head parts are by being solidified to form plate-like portion and multiple key head by ultraviolet curing resin, and the gauge being configured to key head is greater than plate-like portion, and have multiple key head to have the state of predetermined distance in the part configured in column-like manner.
When forming like this, the contraction after because of the solidification of key head parts can be suppressed better and the distortion that causes, and, click feel during user's pressing key header structure can be made outstanding.
In addition, other aspects of key head structure of the present invention are in the present invention as stated above, and the Shore D level hardness of preferred key head parts is set in the scope of 40 degree ~ 80 degree.
When forming like this, the contraction after because of the solidification of key head parts can be suppressed better and the distortion that causes, and, click feel during user's pressing key header structure can be made outstanding.
And then, other aspects of key head structure of the present invention are in the present invention as stated above, preferred key head parts possess distortion and allow parts, wherein, above-mentioned distortion allows that parts are for when pressing any one key head from the top surface side of this key head, make only to press the pressing object being pressed key head, and other key heads except being pressed key head can not press object approach and press independently.
When forming like this, allow parts owing to possessing distortion, therefore, it is possible to only press the pressing object corresponding with being pressed key head exactly.Therefore, when key head structure being used in electronic equipment, misoperation when pressing can be prevented.
In addition, electronic equipment of the present invention, preferably has each invention of closing above-mentioned key head structure, and has and arrange position for what arrange key head parts, further, this arranges position by directly contacting with key head parts or indirect contact and become the part of the structural detail of deformation suppression section part.
When forming like this, directly contacting or indirect contact with key head parts by arranging position, the contraction after because of the solidification of key head parts can be suppressed better and the distortion that causes.Therefore, it is possible to suppress the face side (top surface side) of key head structure to be deformed into concavity better.
And then, as the manufacture method of the key head structure of other aspects of the present invention, preferably include: injection process, aqueous ultraviolet curing resin is injected in the recess of forming metal mould; Setting process, to cover the ultraviolet curing resin be injected in recess and to arrange base material with the state that ultraviolet curing resin is combined closely; Curing process, carries out Ultraviolet radiation to aqueous ultraviolet curing resin and makes aqueous ultraviolet curing resin solidification, manufacturing key head parts thus; Dismounting operation, removes the unitary member of base material and key head parts from forming metal mould; Stripping process, peels off base material from the unitary member of base material and key head parts.
When forming like this, although ultraviolet curing resin shrinks when solidifying, due to the existence of stripping process, the contraction after because of the solidification of key head parts can be suppressed and the distortion that causes.Therefore, it is possible to suppress the face side (top surface side) of key head structure to be deformed into concavity.
(invention effect)
According to the present invention, click feel during pressing key header structure can be made outstanding.Or, when manufacturing key head parts enabling ultraviolet curing resin solidify, suppress the distortion of these key head parts.
Accompanying drawing explanation
Fig. 1 is the stereogram of the structure representing the mobile terminal that one embodiment of the present invention relates to.
Fig. 2 is the formation representing key arrangement portion and key head structure, and represents the profile along a part for the A-A line of Fig. 1.
Fig. 3 is the flow chart of the manufacture method for illustration of key head structure.
Fig. 4 is to manufacture the ideograph of the method for key head structure for illustration of use forming metal mould.
Fig. 5 represents in uncured key head parts, central side alongst, size on Width be greater than end alongst, the vertical view of the state of size on Width.
Fig. 6 represents in uncured key head parts, on the basis of the state of Fig. 5, along Width central side, size on length direction be greater than along Width end, the vertical view of the state of size on length direction.
Fig. 7 is the figure of the cure shrinkage representing key head, situation when (A) expression makes the state before solidification corresponding with the size of regulation, situation when (B) expression makes the state after solidification corresponding with the size of regulation.
Fig. 8 is the figure of the relation between load required when representing interval between adjacent key head and pressing key head.
Fig. 9 is the end view representing the state producing local deformation in key head structure, and (A) represents overall structure, and the figure carrying out representing is amplified by (B) in A portion.
Figure 10 represents base material not by the profile of state peeled off from key head parts.
Figure 11 relates to modified embodiment of the present embodiment, and be represent the mode being warped into convex state with the top surface side of key head structure base material is bent after the profile of state.
Figure 12 is the stereogram of the structure representing the portable telephone device that variation of the present invention relates to.
(symbol description)
10 mobile terminals (corresponding with an example of electronic equipment)
20 basket portions
30 display parts
40 cursor key portions
50 key arrangement portions
60 key head structures
61 key head parts
61a key head
61b plate-like portion
62 dyed layers
70 pressing pieces
71 substrates
72a, 72b fixed contact
73 disk spring shape parts (corresponding with an example of pressing object)
100 manufacturing installations
101 forming metal moulds
102 feeding rollers
103 recesses
105 ultraviolet lamps
M ultraviolet curing resin
Embodiment
Below, according to each accompanying drawing, the key head structure 60 that one embodiment of the present invention relates to is described with the electronic equipment of this key head structure 60 of use.In addition, in the present embodiment, as an example of electronic equipment, illustrate the mobile terminal 10 that can carry out using as portable telephone device, mail terminal etc. to be described, but, electronic equipment is not limited to mobile terminal 10, as long as having key head structure 60 just can be arbitrary electronic equipment.
(overall structure about portable telephone device)
As shown in Figure 1, the mobile terminal 10 in present embodiment possesses basket portion 20, display part 30, cursor key portion 40 and key arrangement portion 50.In addition, take Fig. 1 as representative, in the following description, the length direction of mobile terminal 10 is set to X-direction, the Width of mobile terminal 10 is set to Y-direction, the thickness direction of mobile terminal 10 is set to Z-direction and is described.
The internal structure of mobile terminal 10 covers thus protects this internal structure to exempt from the part of the impact such as external impact, dust by basket portion 20.This basket portion 20 is provided with peristome or recess aptly, and is provided with display part 30 in this peristome or recess one.Display part 30 possesses such as display of organic electroluminescence (Organic Electroluminescence Display), liquid crystal display etc., and according to the display driver of not shown control part with the form of the set of pixels of the regulation gray scale of three primary colors (RGB) display image.
In addition, as shown in Figure 1, cursor key portion 40 has ring-type button portion 41 and center button portion 42, and the top surface side of the key head 61a (with reference to Fig. 2) in this center button portion 42 and ring-type button portion 41 is given prominence to from the opening in basket portion 20.Wherein, such as there is with the interval of 90 degree the position carrying out pressing in ring-type button portion 41.In addition, center button portion 42 is parts that pressing position (top surface side of key head 61a) is surrounded by ring-type button portion 41.
In addition, in FIG, relative to cursor key portion 40 along the X direction spread configuration amount to four key parts, both can be included in cursor key portion 40, also can be included in key arrangement portion 50 in addition.
In addition, in the same manner as cursor key portion 40, the top surface side of the key head 61a in key arrangement portion 50 is given prominence to from the opening in basket portion 20.As shown in Figure 1, in this key arrangement portion 50, the key head 61a of three same shapes that are such as arranged along the Y direction, this key head 61a amounts to 32.In addition, the number of this key head 61a is not limited to 32, is provided with how many individual also passable.As the representative example of the number of key head 61a, the example between having such as 15 ~ 19, example between 30 ~ 50.
In addition, in the key arrangement portion 50 shown in Fig. 1, the arrangement of the key head 61a of left inside side when user inputs is the order of QWERTY, is called as thus " QWERTY key arrangement ".In mobile terminal 10 as shown in Figure 1, just adopt this key arrangement when being arranged with the key head 61a of more than 30.In addition, the layout in key arrangement portion 50 is not limited only to the layout of orthogonal grid shape (chessboard trellis) as shown in Figure 1, also can be the layout that key head 61a arranges in a staggered pattern.
In above-mentioned key arrangement portion 50, realize the key head structure 60 of present embodiment as shown in Figure 2.But key head structure 60 can be the structure realized in cursor key portion 40, in addition, the structure realizing key head structure 60 in the two parts in key arrangement portion 50 and cursor key portion 40 also can be adopted.In addition, in mobile terminal 10 key head structure 60 is set the inside that position is present in basket portion 20 is set.This arranges position by directly contacting or indirect contact with key head parts 61 described later, also can become a part for the structural detail of deformation suppression section part described later.
In addition, by the end face being utilized finger to wait pressing key head 61a by user, this cursor key portion 40 and key arrangement portion 50 can make fixed contact 72b described later and disk spring shape parts 73 in electrical contact.And not shown control part can perform the predetermined function corresponding with this pressing.
< is about the details > of key head structure
Then, the details of key head structure 60 is described.In addition, in the following description, as an example of key head structure 60, for the key head structure realized in key arrangement portion 50, be together described with the detailed construction in this key arrangement portion 50.In addition, about the detailed construction in cursor key portion 40, due to identical with the structure in key arrangement portion 50, therefore the description thereof will be omitted.
Key arrangement portion 50 has key head parts 61, dyed layer 62, pressing piece 70 and substrate 71.
Wherein, key head parts 61 and dyed layer 62 form key head structure 60 jointly.Key head parts 61 are as described later by utilizing Ultraviolet radiation to make ultraviolet curing resin be solidified to form.At this, as aqueous ultraviolet curing resin, the material that with the addition of Photoepolymerizationinitiater initiater etc. in the host containing photopolymerizing prepolymers and monomer can be used in.In addition, as ultraviolet curing resin, can also mixed fillers, antiaging agent, reaction promoter, reaction suppressor, stabilizer, colouring agent etc. as required except above-mentioned substance.
As the host of ultraviolet curing resin, monomer and/or the oligomer of propylene system, isobutene system, polystyrene, unsaturated polyester (UP) system, PEPA system, polyester ether system, polyurethane series, silicon system, epoxy or phenol system etc. can be used, the monomer of the derivative of these materials and/or oligomer, or by multiple for these materials mixed material.
In addition, as ultraviolet curing resin, preferred consolidation shrinks little, transparent and thermal endurance, the material that environment resistant, coloring, formability are outstanding, specifically, preferred use propylene (acryl) is, isobutene system, allyl (allyl) are, polyurethane series, unsaturated polyester (UP) system, silicon based material, or the derivative of these materials, mixture.
At this, at the gauge of resin cured matter at below 0.3mm or when being less than 0.3mm, be more suitable for that ultraviolet curing resin is solidified and form this resin cured matter.On the other hand, at the gauge of resin cured matter at more than 0.5mm or when being greater than 0.5mm, this resin cured matter being formed the such resin of Merlon by injection molding forming is more suitable for.In addition, resin cured matter gauge more than 0.3mm or be greater than 0.3mm and at below 0.5mm or be less than 0.5mm time, both resin cured matter can be formed by the solidification of ultraviolet curing resin, also resin cured matter can be formed by injection molding forming.
In addition, by the Shore D level hardness of the key head parts 61 be solidified to form of ultraviolet curing resin preferably in the scope of 40 degree ~ 80 degree.
These key head parts 61 have key head 61a and plate-like portion 61b.Key head 61a is the part that other parts (being plate-like portion 61b in Fig. 2) be set in Thickness Ratio key head parts 61 are thick.
In addition, the gauge S of plate-like portion 61b is preferably in the scope of 0.03mm ~ 0.15mm.This is because: when gauge is less than 0.03mm, the situation of plate-like portion 61b breakage becomes many, and when gauge S is greater than 0.15mm, the flexibility that plate-like portion 61b is out of shape is impaired.In addition, in the above range, more preferably in the scope of 0.03mm ~ 0.10mm, further more preferably in the scope of 0.03mm ~ 0.05mm.
And then key head 61a interval L is to each other preferably in the scope of 0.2mm ~ 1.0mm.Particularly, by interval L being set as the value in such scope, the area of key head 61a can being increased and guarantee good pressing when pressing with finger, and multiple key head 61a can be configured.
In addition, dyed layer 62 is formed with in the rear side (the Z2 side in Fig. 2) of key head parts 61.In addition, this dyed layer 62 can not also be there is in key head structure 60.
In addition, pressing piece 70 (being represented by dotted lines in Fig. 2) is configured to from the rear side of dyed layer 62 outstanding to substrate 71.This pressing piece 70 such as can be formed by following two kinds of methods, namely, formed with this pressing piece 70 in the elastic plate formed is pasted onto the rear side of dyed layer 62, or, the protruding body becoming pressing piece 70 is pasted onto the rear side of dyed layer 62 and is formed.In addition, in key head structure 60, both can not comprise this pressing piece 70, also can comprise this pressing piece 70 in addition.
In addition, substrate 71 is provided with the state relative with key head structure 60.The face side relative with key head structure 60 in this substrate 71 is provided with fixed contact 72a, 72b and disk spring shape parts 73.Fixed contact 72a, 72b are parts for the conducting position be formed on substrate 71.In addition, disk spring shape parts 73 are corresponding with an example of pressing object described in claim.The outward appearance of these disk spring shape parts 73 in by inverted for cup-shaped form, and, the edge part of these disk spring shape parts 73 on substrate with the connecting at least partially of fixed contact 72a.These disk spring shape parts 73 are configured to buckle (plane is buckled).Therefore, when user presses key head 61a and applies to specify above pressing force to disk spring shape parts 73, a part for these disk spring shape parts 73 is deformed into the state of depression from the state towards Z1 direction projection.Now, a part for disk spring shape parts 73 contacts with fixed contact 72b, thus forms the state that can conduct.
In addition, when the pressing by releasing of key head 61a, the elasticity had by disk spring shape parts 73 and state of buckling are disappeared, thus return to original state.Thus, disk spring shape parts 73 and fixed contact 72b are noncontact, thus become the non-state conducted.
< is about the manufacture method > of key head structure
Then, the manufacture method of key head structure 60 of the present embodiment is described.Fig. 3 is the flow chart of the summary of manufacture method for illustration of key head structure 60.In addition, Fig. 4 be for centered by forming metal mould 101 to the ideograph that the manufacture method of key head structure 60 is described.
When manufacturing key head structure 60, first, never illustrated for aqueous ultraviolet curing resin M pressure tank is filled into (S01 in forming metal mould 101; With reference to Fig. 4 (a)).
Then, erection is made to have the feeding roller 102 of base material 110 to be arranged in the end side (left side of Fig. 4 (b)) (S02) of forming metal mould 101.After this state, make feeding roller 102 from end side to another side (right side Fig. 4 (c)) mobile (S03).So as shown in Fig. 4 (c), the ultraviolet curing resin M of surface in uneven state is extruded, and the surface of this ultraviolet curing resin M is imitated base material 110 and becomes smooth state.Then, base material 110 is positioned at the face side of ultraviolet curing resin M with the state covered by recess 103.
At this, in the present embodiment, as shown in Figure 5, when overlooking uncured key head parts 61 (ultraviolet curing resin M), the size on the Width of these key head parts 61 (ultraviolet curing resin M) is set to: end alongst, size X2 on Width be less than center alongst, size X1 on Width.This is because, contraction is by a larger margin there is when the central side solidification of length direction.Therefore, in key head parts 61 after hardening, the above-mentioned size X2 of above-mentioned size X1=.It should be noted that, in this equation, also can contain a little error.
When above-mentioned idea as shown in Figure 5 being launched further, become the state shown in Fig. 6.As shown in Figure 6, when overlooking uncured key head parts 61 (ultraviolet curing resin M), the size on the length direction of these key head parts 61 (ultraviolet curing resin M) is set to: along Width end, size Y2 on length direction be less than along Width center, size Y1 on length direction.By like this, in key head parts 61 after hardening, the above-mentioned size Y2 of above-mentioned size Y1=.In addition, in this equation, also a little error can be contained.
In addition, in key head 61a, also can there is contraction when uncured key head parts 61 (ultraviolet curing resin M) solidify.Namely, when making the state before solidification corresponding with the size of regulation when not considering cure shrinkage, as shown in Fig. 7 (A), due to the solidification of ultraviolet curing resin M, the end of comparing on each limit of key head 61a is shrunk to closer to the position of central authorities and caves in towards inner side.Therefore, in the parts shown in Fig. 7 (B), in advance this cure shrinkage is estimated, and under the state that ultraviolet curing resin M is uncured, make on each limit of key head 61a compare end closer to central authorities position toward the outer side (side away from key head 61a inside) give prominence to.That is, in advance the recess 103 of forming metal mould 101 is formed as the state of the key head 61a in shop drawings 7 (B) left side.So, as shown in the right side of Fig. 7 (B), formed the key head 61a of given size by cure shrinkage.
Then, make ultraviolet lamp 105 near forming metal mould 101 and carry out Ultraviolet radiation (S04; With reference to Fig. 4 (d)).Then, when the Ultraviolet radiation carrying out the stipulated time, ultraviolet curing resin M solidifies.After this Ultraviolet radiation terminates, ultraviolet lamp 105 is made to keep out of the way top.So the part of solidifying as key head parts 61 is stripped (S05) from forming metal mould with the state of pasting on substrate 110.
Then, the part being pasted with key head parts 61 is on substrate 110 taken out, and base material is peeled off (S06) from key head parts 61.At this, in order to easily be peeled off from key head parts 61 by base material 110, the liquid of regulation also can be applied on base material.In addition, as the opportunity of being peeled off from key head parts 61 by base material 110, ultraviolet lamp 105 is preferably such as utilized to carry out after Ultraviolet radiation soon.
By having manufactured key head parts 61 like that above.Then, also dyed layer 62 can be formed by such as banding printing at the back side of key head parts 61.In addition, the heat treatment (heat treated) for making above-mentioned such key head parts 61 manufactured solidify can also be carried out.
" implementation procedure about the key head structure in present embodiment "
[1. about the necessity of ultraviolet curing resin]
When being formed key head structure by injection molding forming, after in resin-cast to metal pattern, make it solidify, but the restriction from this shaping, exist and is difficult to the gauge of such as below 0.3mm to the restriction in the such shaping of the key head that is shaped.In addition, in key head parts, limit from the design for the position of casting resin such as the inlet metal pattern and runner afterwards thereof, the shape that multiple key head that is difficult to be shaped is connected, but need to form staggered key head, then this key head be separated and then assemble.
Compared with this injection molding forming, in the mechanograph using ultraviolet curing resin, the shape that multiple key head is connected can be formed.But, in the mechanograph that multiple key head is connected, due to gassing be mixed into, the problem of indenture (sink mark) etc., therefore, certain gauge that this mechanograph is had as key head becomes difficulty.That is, when using ultraviolet curing resin to manufacture mechanograph, be difficult to manufacture the large mechanograph of gauge, but on the contrary, be very suitable for the large slimming of demand in recent years (manufacturing the situation of the little mechanograph of gauge).
In addition, in order to formed be easy to operate key head structure and increase the size of key head end face time, the interval between key head can be caused on the contrary to diminish.When interval between key head diminishes, there is the situation of interference mutually between adjacent key head, thus there is the impaired situation of operation sense.At this, the interval between adjacent key head is shown in Figure 8 with the relation table of load required during pressing key head.From this Fig. 8, when the interval between adjacent key head becomes large, load during pressing diminishes, thus operation sense is good.
In addition, operation sense during in order to reduce interval between adjacent key head and improve pressing key head, also can be considered to adopt method as following, that is, all be cut off by key head, and be arranged on the high plate-shaped member of coefficient of elasticity with the spacing of regulation by bonding grade.
That is, in order to press sense when making operation becomes good, need to make the load variations during pressing of the disk spring shape parts be positioned at below key head be passed to key head losslessly.But in the key head structure that key head is connected, along with the key head be pressed deforms, the key head that adjacent key head is also pressed relative to this is out of shape continuously.Therefore, resulting load and the load sum required during pressing disk spring shape parts of the load of the load needed for above-mentioned distortion needed for these distortion, thus cause press sense when operating to be deteriorated.In order to avoid this press sense is deteriorated, need as described above by the key head utilizing ultraviolet curing resin to be shaped with make its all independently mode cut off, and to be arranged on the low plate-shaped member of coefficient of elasticity by bonding etc.
But in this situation, the operation of depositing during fabrication complicates, and increases such problem man-hour in addition.In addition, the gap-forming between being also difficult to key head is necessarily such problem, and, sometimes also can mistake the assembly defect at the interval between key head etc.Therefore, be difficult to adopt and the key head after being shaped all is cut off independently, and be arranged on method such on the high plate-shaped member of coefficient of elasticity by bonding etc.
[3. about ultraviolet curing resin and base material]
But, in the present circumstance, when the mechanograph using ultraviolet curing resin manufacture as key head parts, need base material and key head parts in addition bonding.This is just as described in above-mentioned manufacture method, the base material of film-form is set on the metal pattern top of the recess that there are key head parts, and the aqueous ultraviolet curing resin that the amount of resin of key head parts needed for packing ratio is many, then, make scraper plate (squeegee) also mobile with the substrate contact of film-form, at the position of the rear side becoming key head parts, unnecessary aqueous ultraviolet curing resin is extruded, thus shape is repaired, then make it solidify, and the mechanograph solidified as key head parts is taken out from forming metal mould.
Owing to being so form key head parts, therefore, the mechanograph of ultraviolet curing resin is by state that is bonding or strong bond with base material.Therefore, in order to press sense when making operation as described above becomes good, need the gauge making base material to become minimum or as base material material and use soft material.But, when making the gauge of base material become minimum and as base material material and use soft material time, there is the problem that warpage becomes so greatly.
[4. there is the experimental result of the key head parts of base material]
In addition, the gauge of base material will be changed between 0.05mm ~ 0.15mm, and the experimental result that load during each gauge needed for pressing and click feel (click feeling) are measured is shown in table 1.At this, as the clicking rate (%) of the desired value of expression click feel, it is the value (%) defined with following formula when using identical disk spring shape parts.In addition, C represents clicking rate (%), and P represents peak load (peak load) (unit: gram), and B represents end load (bottom load) (unit: gram).In addition, peak load represent disk spring shape parts buckle before peak load, end load represents the minimum load that can keep this state of buckling after disk spring shape parts are buckled.In addition, the material of base material is now PETG (PET).
C＝100×(P-B)/P
[table 1]
| The gauge (mm) of base material | 0.05 | 0.1 | 0.125 | 0.15 |
| Load (g) | 322 | 362 | 396 | 490 |
| Clicking rate (%) | 19 | 14 | 11 | 0 |
In addition, by when the gauge of base material changes as in above-mentioned table 1, to the size of the warpage of key head structure during each gauge, can be brought by double faced adhesive tape and correct blocking of this warpage and end and feel the experimental result of carrying out measuring and be shown in table 2.In addition, herein said " warpage of key head structure ", when the core referring on the back side of key head structure contacts with datum level, the height dimension that the end of the rear side of key head structure upwarps relative to this datum level.In addition, so-called the end of the key head structure " block sense ", refer to sensation as following, namely, when to there is local deformation towards the direction identical with warpage with the curvature being greater than above-mentioned warpage in the end of key head structure, the sensation during end of user with hand membrane keyboard header structure, hand blocked.In addition, in table 2, the key head structure being 50mm to the length dimension of the other end from one end is used to test.
[table 2]
| The gauge (mm) of base material | 0.05 | 0.1 | 0.125 | 0.15 |
| The size (mm) of warpage | 12 | 3 | 1.5 | 0.8 |
| Two-sided tape can be utilized to correct warpage | Energy | Energy | Energy | Energy |
| Key head structure end block sense | Exist a little | Have | Have | Obvious existence (naked eyes identifiable design) |
In addition, by when the gauge of base material changes as in above-mentioned table 1, the experimental result that load when changing material (raw material) of each base material needed for pressing and click feel are measured is shown in table 3.In addition, in table 3, the gauge of each base material is 0.1mm.
[table 3]
| The material of base material | PETG | Merlon | Polyurethane |
| Load (g) | 362 | 349 | 298 |
| Clicking rate (%) | 14 | 17 | 21 |
At this, to material and gauge Bu Tong but an example of the load more preferably than above-mentioned table 3 and clicking rate is described.The load be assembled into by pre-cut key head when gauge is 0.2mm, material is on the base material of silicon rubber is 234g, and clicking rate is 27%.
[5. based on the research of experimental result of key head structure that there is base material]
According to the experimental result of above table 1 ~ table 3, when the gauge of base material is 0.05mm, better click feel (operation sense) can be obtained.On the other hand, when the gauge of base material is 0.1mm ~ 0.125mm, along with gauge becomes large and click feel (operation sense) variation.Particularly, in the base material of gauge with more than 0.125mm, total load required during click increases to and less can feel the change of the load on disk spring shape parts.
In addition, according to above-mentioned experimental result, when the gauge of base material is 0.05mm, in key head structure, produce significantly warpage, and on the other hand, when the gauge of base material is 0.125mm, the warpage in key head structure can be suppressed to about 1.5mm.
From this result, when the gauge of base material is 0.05mm, although the warpage of key head structure is large, because base material itself is thin and be so-called soft condition, therefore, by being such as clamped in plane plate face etc., can easily correct.On the other hand, when the gauge of base material is 0.125mm, the warpage in key head structure is little, and two-sided tape also can be utilized in addition to be fixed.Therefore, at first sight feel fine.But, as shown in Figure 9, in the end of key head structure, produce not by part that two-sided tape is fixed because two-sided tape offsets (off-set) relative to base material etc.At this, due to restriction, apparent problem etc. on the base dimensions of the installation position as key head structure, and in the mode exposed from key head structure, two-sided tape cannot be installed.Therefore, in the end of key head structure, produce the part that skew occurs relative to base material etc. two-sided tape.
And, owing to producing local deformation in the portion, therefore, such as, block sense when button operation with also feeling during hand touch etc.In addition, in the inside of mobile terminal 10, owing to producing heat by circuit etc., therefore, become the state promoting above-mentioned local deformation.In addition, when the end of generation being blocked to sense is applied above the peeling force estimated, there is the possibility that key head structure is peeled off from basket.
In addition, two-sided tape is installed in end and the dorsal part of base material with the state in housing (cased) shape, thus is fixed on the standing part of regulation by this two-sided tape.
Specify that following situation by experimental result, that is, increasing the such method of the gauge of base material by adopting as described above, namely allowing to the overall warpage reducing key head structure, but also cannot local deformation on the end of cancel key header structure and block sense.In addition, in physical device, the requirement considering also to there is the slimming of key head structure is also needed.As mentioned above, in the framework of method so far, design, the end in cancel key header structure blocks the very difficult state of sense.
At this, about the reason of warpage, be because in key head structure, in the process of uncured ultraviolet curing resin solidification, produce cure shrinkage.Such as, as general ultraviolet curing resin, when the ultraviolet curing resin of the radical polymerization mould assembly being main component with acrylate, unsaturated polyester (UP), produce the cure shrinkage of about 5 ~ 10%.On the other hand, the retractility of base material is not good.Therefore, if when ultraviolet curing resin is positioned at the face side of base material, the face side produced along with the cure shrinkage of ultraviolet curing resin residing for this ultraviolet curing resin caves in such distortion.
[6. the trial of new method]
Therefore, change the design of method so far and explore the method adopting diverse mode (approach).In this exploration, have studied employing and make the gauge of base material become size the thinnest in theory, cancel the such method of base material.In addition, in the present circumstance, not yet find that other people adopt the fact of which in key head structure.Think this is because: in the manufacture of the mechanograph of existing use ultraviolet curing resin, when ultraviolet curing resin solidifies, owing to not being determined to become the reasons such as the position of benchmark, base material must exist, in addition, from above-mentioned table 2 etc., owing to adopting the mode increasing the gauge of base material such can reduce warpage to a certain degree, there is the possibility in the such design of the gauge that is limited to increase base material thus.
In addition, as mentioned above, in the manufacture of the mechanograph of existing use ultraviolet curing resin, base material must exist, therefore, when cancelling base material when using ultraviolet curing resin, and the one-tenth deformation difficulty of key head structure.Therefore, need to try every possible means further, after various exploration, find method as following, and the details of the method is studied, that is, in during ultraviolet curing resin solidification, be formed as ultraviolet curing resin and be bonded in state on base material, and after ultraviolet curing resin solidification, base material is peeled off.
[7. the research of the gauge aspect of new method]
In this study, using the gauge of the plate-like portion of the key head parts of mechanograph changed between 0.03mm ~ 0.15mm as ultraviolet curing resin, and the experimental result that load during each gauge needed for pressing and click feel are measured is shown in table 4.In addition, in this experiment, as the material of ultraviolet curing resin, the H17 (trade name) that Shore D level hardness that Ye Chuan KCC (Nogawa Chemical Co., Ltd) makes is 50 degree is employed.
[table 4]
| The gauge (mm) of plate-like portion | 0.03 | 0.07 | 0.1 | 0.15 |
| Load (g) | 196 | 208 | 267 | 342 |
| Clicking rate (%) | 27 | 24 | 21 | 12 |
The experimental result of his-and-hers watches 4 and the experimental result of above-mentioned table 1 compare the situation of being known as below, that is, when such method peeled off by base material by employing after ultraviolet curing resin solidification, amount to load and be greatly diminished, further, click feel (operation sense) is also improved greatly.And then, in key head parts, become the state that almost can't see warpage and local deformation.At this, because ultraviolet curing resin is formed by sufficiently high material flexible compared with base material, therefore, it is possible to realize the state that warpage and local deformation can not become problem.
[research 8. in the durability of new method]
Then, when key head structure is mounted in physical device, also need to consider its durability.Particularly, the gauge in the thinnest plate-like portion is thinner, more worries the state of durability.Therefore, carried out following experiment, that is, button test (keystroke test) has been implemented to the plate-like portion of each gauge in above-mentioned table 4, confirm the touch potential that the thinnest plate-like portion breaks thus.In addition, also record is carried out to the buckling load (buckling load) of the disk spring shape parts used in the test of this button simultaneously.In addition, in this experiment, carry out button with the key press time of 3.3 times/second, load during button is 750g, configures keyway (key seat) in addition, and carry out button test by this keyway on the surface of key head.In addition, the disk spring shape parts that buckling load is 170g are used to carry out button test.
[table 5]
| The gauge (mm) of plate-like portion | 0.03 | 0.07 | 0.1 | 0.15 |
| Touch potential till breaking | 350000 times | 550000 times | 650000 times | 700000 times |
From the experimental result of this table 5, when gauge is in the scope of 0.03mm ~ 0.15mm, can use according to service condition completely.
[research 9. in the constituent structure of new method]
Then, within the scope of the gauge of 0.03mm ~ 0.15mm, the constituent structure of ultraviolet curing resin is changed according to above-mentioned table 5, and can to use (be applicable to product) to be studied as actual product, its result be as shown in following table 6.In addition, about " can product be applicable in the button test under 750g load " in table 6, when the button test carrying out 250,000 times is also broken, be considered as can being applicable to product and representing with "○", when breaking in the button test within 250,000 times, be considered as can not being applicable to product and representing with "×".In addition, about " can product be applicable in the button test under 10kg load " in table 6, when the button test carrying out 5,000 times is also broken, be considered as can being applicable to product and representing with "○", when breaking in the button test within 5,000 times, be considered as can not being applicable to product and representing with "×".
[table 6]
In above-mentioned table 6, Class1 ~ 6 represent the kind (material) of ultraviolet curing resin.The ultraviolet curing resin of these Class1 ~ 6 is the ultraviolet curing resin of acrylic ester, and is the ultraviolet curing resin being adjusted to the hardness measured respectively by the change degree of polymerization or crosslink density.
From the experimental result of above-mentioned table 6, the ultraviolet curing resin of the type 3 ~ type 6 in above-mentioned ultraviolet curing resin is suitable for the product as reality.
[10. about the manufacture of reality]
Manufacture forming metal mould 101 according to above experimental result, result of study, and implement the manufacture of the key head structure becoming product.In this manufacture, the gauge of plate-like portion is set to 0.03mm by the result according to above-mentioned table 4, table 5, to make click feel (operation sense) good.In addition, in view of required key head height and Fig. 7 etc., the gauge of key head is set to 0.4mm.In addition, manufacture this key head structure time, as film-form base material and use the base material that gauge is 0.05mm.In addition, in the S04 of Fig. 3, the ultraviolet of about 20 seconds is irradiated to aqueous ultraviolet curing resin and makes it solidify.In addition, in the S06 of Fig. 3, with peel off before state be that the mode of 35 degree of angles uses separator pull the base material of film-form and peeled off.
Afterwards, carry out being heating and curing of 2 hours with 80 degree Celsius, to make the dimensionally stable of mechanograph.Then, in order to by its commercialization, implement to band printing to the rear side of key head parts and form dyed layer, and then the heat drying carrying out 2 hours with 80 degree Celsius is to make dyed layer dry.Thus, obtain banding, key head structure as shown in Figure 2.In the key head structure obtained through above-mentioned each operation, in not producing the state of warpage and local deformation, particularly in the end of key head structure, do not exist cause because of the generation of local deformation block sense.In addition, manufacturing key head without the need to carrying out cutting etc., therefore, becoming the key head structure that assembleability is also outstanding.
< is about embodiment >
Then, to have formation as described above key head structure 60, be described about the evaluation (embodiment) of action during pressing.
(manufacture method of sample)
First, in order to manufacture key head parts 61, the Shore D level hardness preparing above-mentioned Ye Chuan KCC is the H17 (trade name) of 50 degree is as ultraviolet curing resin.By the manufacture method shown in above-mentioned Fig. 3, Fig. 4, this ultraviolet curing resin is solidified, manufactured key head parts 61 thus.Now, the base material (gauge is for 0.05mm) that to use with PETG (PET) as base material 110 be material, has manufactured key head 61a thus.The Shore D level hardness of manufactured key head parts 61 is 50 degree.In addition, in the rear side of these key head parts 61, define with the ink of Polyester for material and gauge is the dyed layer 62 of 10 μm.
In addition, the outstanding pressing piece 70 being of a size of 0.2mm is defined in the rear side of key head parts 61.In addition, disk spring shape parts 73 are provided with the state contacted with pressing piece 70.These disk spring shape parts 73 are in the state of the outstanding size (height dimension) had from the surperficial 0.26mm of substrate 71.In addition, the buckling load of these disk spring shape parts 73 is 170g.
(embodiment 1)
In such a state, while the gauge S changing plate-like portion 61b, do not change the gauge T of key head 61a and be set to fixed value 0.4mm, and do not change key head 61a interval L to each other and be set to fixed value 0.2mm, and with following benchmark, the operation sense of key head structure 60 and the situation of misoperation are evaluated.
◎ ... easy pressing and there is not misoperation.
Zero ... there is sense of discomfort during pressing, but there is not misoperation.
△ ... misoperation is there is during pressing.
[table 7]
| Size S (mm) | 0.03 | 0.09 | 0.15 | 0.17 | 0.20 |
| Operation sense | ◎ | ◎ | ◎ | ○ | △ |
| Misoperation | Nothing | Nothing | Nothing | Nothing | Have |
From the result of above-mentioned table 7, when the gauge S of plate-like portion 61b is in the scope of 0.03mm ~ 0.15mm, presses easily and there is not misoperation.
(embodiment 2)
Then, while changing key head 61a interval L to each other, do not change the gauge T of key head 61a and be set to fixed value 0.4mm, and do not change the gauge S of plate-like portion 61b and be set to fixed value 0.05mm, and with following benchmark, the operation sense of key head structure 60 and the situation of misoperation are evaluated.
◎ ... easy pressing and there is not misoperation.
Zero ... there is sense of discomfort during pressing, but there is not misoperation.
△ ... misoperation is there is during pressing.
[table 8]
| Size L (mm) | 0.12 | 0.17 | 0.2 | 0.6 | 1.0 |
| Operation sense | △ | ○ | ◎ | ◎ | ◎ |
| Misoperation | Have | Nothing | Nothing | Nothing | Nothing |
From the result of above-mentioned table 8, when key head 61a interval L is to each other in the scope of more than 0.2mm, pressing easily and there is not misoperation.
In addition, the result of above-described embodiment 1 and embodiment 2 is summed up, as shown in table 9.
[table 9]
From above-mentioned table 9, the gauge S of preferred plate-like portion 61b is in the scope of 0.03mm ~ 0.15mm, and the predetermined distance L between multiple key head 61a is in the scope of 0.2mm ~ 1.0mm.In this situation, key head structure 60 easily presses and there is not misoperation.
(embodiment 3)
Then, embodiment when changing the Shore D level hardness of key head parts 61 is expressed as follows.In this embodiment, do not change the gauge T of key head 61a and be set to fixed value 0.4mm, do not change the gauge S of plate-like portion 61b and be set to fixed value 0.05mm, and do not change key head 61a interval L to each other yet and be set to fixed value 0.2mm.And, with following benchmark, the operation sense of key head structure 60 and the situation of misoperation are evaluated.
◎ ... pressing easily and there is not misoperation.
Zero ... there is sense of discomfort during pressing, but there is not misoperation.
△ ... misoperation is there is during pressing.
[table 10]
| Shore D level hardness | 30 | 35 | 40 | 60 | 80 | 90 | 95 |
| Operation sense | △ | ○ | ◎ | ◎ | ◎ | ○ | △ |
| Misoperation | Have | Nothing | Nothing | Nothing | Nothing | Nothing | Have |
From the result of above-mentioned table 10, when the Shore D level hardness of key head parts 61 is in the scope of 40 degree ~ 80 degree, easily presses and there is not misoperation.
At this, under key head parts 61 are pasted with the state (state shown in Figure 10) of base material 110, do not form deformation suppression section part described in claim.That is, deformation suppression section part is the parts be just implemented after key head parts 61 stripping by base material 110.That is, although base material does not almost shrink, key head parts 61 shrink when solidifying.Also situation as following can be grasped, namely, suppress the deformation suppression section part of warpage and the local deformation produced because the contraction of above-mentioned two parts is unbalanced, the operation (time) such by enforcement peeling base 110 and being implemented in key head structure 60.
In addition, from the result of the various embodiments described above, when Shore D level hardness is 50 degree (fixed value), make the gauge S of plate-like portion 61b in the scope of 0.03mm ~ 0.15mm, and the predetermined distance L between multiple key head 61a in the scope of 0.2mm ~ 1.0mm time, play a role well as deformation suppression section part.In addition, as long as Shore D level hardness is in the scope of 40 degree ~ 80 degree, just can guarantee to play a role well as deformation suppression section part.
In addition we know, when the gauge S of plate-like portion 61b is in the scope of 0.03mm ~ 0.15mm, distortion described in claim allows that parts play a role well.Wherein, more preferably the gauge S of plate-like portion 61b is in the scope of 0.03mm ~ 0.10mm, and then the gauge S being more preferably plate-like portion 61b is in the scope of 0.03mm ~ 0.05mm.
In addition, distortion allows that parts are preferably parts as following, namely, when any one key head 61a is pressed from its top surface side, make only to press the disk spring shape parts 73 (pressing object) being pressed key head 61a, further, the mode that other key heads 61a except being pressed key head 61a can not press disk spring shape parts 73 (pressing object) presses independently.
< effect >
According to the manufacture method of the key head structure 60, mobile terminal 10 (electronic equipment) and the key head structure 60 that form like that above, although ultraviolet curing resin shrinks when solidifying, but, by being peeled off from key head parts 61 by base material 110, deformation suppression section part is implemented, therefore, it is possible to suppress the distortion caused because of the contraction after the solidification of key head parts 61.Therefore, it is possible to suppress the face side (top surface side) of key head structure 60 to be deformed into concavity.
In addition, in the present embodiment, after contraction is after hardening in prescribed limit, base material 110 is peeled off from key head parts 61, deformation suppression section part is made to be implemented thus, therefore, the state not being pasted with the not good base material of retractility in key head structure 60 (key head parts 61) is become.Therefore, it is possible to the state that when eliminating user's pressing key header structure 60, click feel is not good.
In addition, in the present embodiment, the local deformation on key head structure 60 end can be suppressed, thus can eliminate this end block sense.At this, producing under the state blocking sense due to local deformation, when the end of generation being blocked to sense is applied above the peeling force estimated, there is the danger that key head parts 61 are peeled off from base material 110, but, in the present invention, owing to being base material 110 is peeled off and forms key head structure 60, therefore, it is possible to eliminate such unfavorable condition.
In addition, particularly in mobile terminal 10 as shown in Figure 1, is be called as the such key arrangement of QWERTY key arrangement due to what adopt, therefore, the state that the number becoming key head 61 is more than common portable telephone device etc.At this, in the limited situation of the size of mobile terminal 10, for configuration multiple (such as more than 30) key head 61, and when the area increasing key head 61 guarantees good pressing when pressing with finger, adjacent key head 61 interval to each other will inevitably be made to diminish.By being applicable in such mobile terminal 10 by the key head structure 60 of present embodiment, not only click feel is outstanding, and the face side of key head structure 60 as described above can be suppressed to cave in such distortion, and then can eliminate and as described abovely block sense.
And then in the present embodiment, the gauge S of preferred plate-like portion 61b is in the scope of 0.03mm ~ 0.15mm, and the predetermined distance L between multiple key head 61a is in the scope of 0.2mm ~ 1.0mm.
By such formation, the contraction after because of the solidification of key head parts 61 can be suppressed better and the distortion caused, and, click feel during user's pressing key header structure 60 can be made outstanding.
In addition, in the present embodiment, preferably the Shore D level hardness of key head parts 61 is located in the scope of 40 degree ~ 80 degree.By such formation, the contraction after because of the solidification of key head parts 61 can be suppressed better and the distortion caused, and, click feel during user's pressing key header structure 60 can be made outstanding.
And then, in the present embodiment, preferred key head structure 60 possesses distortion and allows parts, wherein, above-mentioned distortion allows that parts are for when pressing any one key head 61a from its top surface side, make only to press the pressing object being pressed key head 61a, and the mode that other key heads 61a except being pressed key head 61a can not press object presses independently.
By such formation, the disk spring shape parts 73 corresponding with being pressed key head 61a only can be pressed exactly.Therefore, when in electronic equipment key head structure 60 being used in mobile terminal 10 grade, misoperation when pressing can be prevented.
In addition, in the present embodiment, be preferably provided with in basket portion 20 and position is set for what arrange key head structure 60, and this arranges position by directly contacting with key head structure 60 or indirect contact and become the part of the structural detail of deformation suppression section part.By such formation, the contraction after because of the solidification of key head parts 61 can be suppressed better and the distortion caused.Therefore, it is possible to suppress the face side of key head structure 60 to be deformed into concavity better.
In addition, in the present embodiment, as shown in Fig. 7 (B), under the state that ultraviolet curing resin M is uncured, make in advance on each limit of key head 61 compare end closer to central authorities position toward the outer side (side away from key head 61 inside) give prominence to.In addition, as shown in the right side of Fig. 7 (B), be the state of the key head 61 being formed given size by cure shrinkage.Thereby, it is possible to the key head 61 that the impact realizing cure shrinkage is little.
< variation >
Above, the key head structure 60 that one embodiment of the present invention is related to, to be illustrated as the mobile terminal 10 of an example of electronic equipment and the manufacture method of key head structure 60, but in addition the present invention can also carry out various distortion.Below be explained.
In the above-described embodiment, when manufacturing key head structure 60, also can according to carrying out as shown in Figure 11.That is, also base material 110 can be made bending to make the top surface side of key head parts 61 mode convexly and contact with forming metal mould 101 that (for this reason, the forming face 101a of preferred forming metal mould 101 bends to concavity.), and with this state, aqueous ultraviolet curing resin M is solidified.When carrying out like this, contraction when being solidified by aqueous ultraviolet curing resin M, and make plate-like portion 61b and base material 110 when this solidification in keeping approximate horizontal or level or can be considered the state of level.
In addition, the degree of crook (degree of crook of forming face 101a) of base material 110 is preferably set to degree as following, namely, contraction when being solidified by aqueous ultraviolet curing resin M, and make plate-like portion 61b and the base material 110 generally horizontal or level or can be considered the state of level when this solidification.
In addition, in the above-described embodiment, the situation of the mobile terminal 10 used as shown in Figure 1 is illustrated.But mobile terminal is not limited to the terminal shown in Fig. 1.Such as, also the present invention can be applicable to as shown in Figure 12, as in a kind of portable telephone device 10A of mobile terminal.In addition, in the portable telephone device 10A shown in Figure 12, possess basket portion 20, display part 30, cursor key portion 40 and key arrangement portion 50 in the same manner as the mobile terminal 10 shown in Fig. 1.
In addition, cursor key portion 40 has ring-type button portion 41 and center button portion 42, and the top surface side of the key head 61a (with reference to Fig. 2) in this center button portion 42 and ring-type button portion 41 is given prominence to from the opening in basket portion 20.At this, such as there is with the interval of 90 degree the position carrying out pressing in ring-type button portion 41.In addition, center button portion 42 is parts that pressing position (top surface side of key head 61a) is surrounded by ring-type button portion 41.
In addition, in the same manner as cursor key portion 40, the top surface side of the key head 61a in key arrangement portion 50 is given prominence to from the opening in basket portion 20.As shown in figure 12, in this key arrangement portion 50, such as, the key head 61a of three same shapes that are arranged along the X direction, to be arranged the key head 61a of five same shapes along the Y direction.
In such portable telephone device 10A, also can suppress the contraction after because of the solidification of key head parts 61 and the distortion caused.In addition, the state that when can eliminate user's pressing key header structure 60, click feel is not good.In addition, the local deformation on the end of key head structure 60 can be suppressed, thus can eliminate this end block sense, and, can eliminate and peel off such unfavorable condition to producing key head parts 61 when the end of blocking sense is applied above the peeling force estimated from base material 110.
In addition, in the above-described embodiment, the situation that the top surface shape of key head 61a is flat condition is illustrated.But the top surface shape of key head 61a is not limited to smooth shape, other shapes in addition (such as curved, concavity, convex, wavy etc.) also can be formed as.
Claims (8)
1. a key head structure, is characterized in that,
Aqueous ultraviolet curing resin is injected in the recess of forming metal mould,
So that the described ultraviolet curing resin be injected in described recess is covered and arranges base material with the state that ultraviolet curing resin is combined closely,
Ultraviolet radiation is carried out to aqueous described ultraviolet curing resin, makes described ultraviolet curing resin solidify thus,
The unitary member of described base material and key head parts is removed from described forming metal mould,
Then, peeled off from the unitary member of described base material and described key head parts by described base material, form plate-like portion and key head thus, wherein, described key head is at predetermined intervals in configuration in column-like manner and gauge is greater than described plate-like portion;
Described key head structure has described key head parts;
In at least one side of part corresponding with described key head in aqueous described ultraviolet curing resin, the end of comparing on this limit is given prominence to towards the side of the inside away from described key head closer to the position of central authorities,
In described key head parts after hardening, form described key head described, towards the inside away from described key head the projecting through cure shrinkage of side and be eliminated, thus described one side is linearly.
2. a key head structure, is characterized in that, possesses:
Key head parts, it is by being solidified to form plate-like portion and multiple key head by ultraviolet curing resin, and the gauge being configured to described key head is greater than described plate-like portion, and, there is multiple described key head there is the state of predetermined distance in the part configured in column-like manner;
Deformation suppression section part, when it forms described key head parts for making described ultraviolet curing resin solidify relative to base material, suppresses the contraction after because of the solidification of described key head parts and the distortion that causes;
Described deformation suppression section part, peels off described base material from described key head structure after being in prescribed limit and form by the contraction after the solidification of described key head parts.
3. key head structure as claimed in claim 1 or 2, is characterized in that,
The gauge of described plate-like portion is in the scope of 0.03mm ~ 0.15mm, and the predetermined distance between multiple described key head is in the scope of 0.2mm ~ 1.0mm.
4. key head structure as claimed in claim 3, it is characterized in that, the Shore D level hardness of described key head parts is arranged in the scope of 40 degree ~ 80 degree.
5. a key head structure, is characterized in that,
Aqueous ultraviolet curing resin is injected in the recess of forming metal mould,
So that the described ultraviolet curing resin be injected in described recess is covered and arranges base material with the state that ultraviolet curing resin is combined closely,
Ultraviolet radiation is carried out to aqueous described ultraviolet curing resin, makes described ultraviolet curing resin solidify thus,
The unitary member of described base material and key head parts is removed from described forming metal mould,
Then, peeled off from the unitary member of described base material and described key head parts by described base material, form plate-like portion and key head thus, wherein, described key head is at predetermined intervals in configuration in column-like manner and gauge is greater than described plate-like portion;
Described key head structure has described key head parts;
Described key head parts possess distortion and allow parts,
Described distortion allows that parts are for when pressing key head described in any one from the top surface side of this key head, make the pressing object only pressing the described key head be pressed, further, the mode that key head described in other except the described key head be pressed can not press described pressing object presses independently.
6. a key head structure, is characterized in that,
Possess:
Key head parts, it is by being solidified to form plate-like portion and multiple key head by ultraviolet curing resin, and the gauge being configured to described key head is greater than described plate-like portion, and, there is multiple described key head there is the state of predetermined distance in the part configured in column-like manner;
Deformation suppression section part, when it forms described key head parts for making described ultraviolet curing resin solidify relative to base material, suppresses the contraction after because of the solidification of described key head parts and the distortion that causes;
Described key head parts possess distortion and allow parts,
Described distortion allows that parts are for when pressing key head described in any one from the top surface side of this key head, make the pressing object only pressing the described key head be pressed, further, the mode that key head described in other except the described key head be pressed can not press described pressing object presses independently.
7. a key head structure, is characterized in that,
Possess key head parts, wherein, described key head parts are by being solidified to form plate-like portion and multiple key head by ultraviolet curing resin, and the gauge being configured to described key head is greater than described plate-like portion, and there is multiple described key head there is the state of predetermined distance in the part configured in column-like manner;
The gauge of described plate-like portion is in the scope of 0.03mm ~ 0.15mm, and the predetermined distance between multiple described key head is in the scope of 0.2mm ~ 1.0mm;
Described key head parts possess distortion and allow parts,
Described distortion allows that parts are for when pressing key head described in any one from the top surface side of this key head, make the pressing object only pressing the described key head be pressed, further, the mode that key head described in other except the described key head be pressed can not press described pressing object presses independently.
8. an electronic equipment, is characterized in that,
Possess key head structure according to claim 2, and have position is set for what arrange described key head parts;
This arranges position by directly contacting with described key head parts or indirect contact and become the part of the structural detail of described deformation suppression section part.
Applications Claiming Priority (3)
| 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 | ||
| PCT/JP2010/073598 WO2011081148A1 (en) | 2009-12-28 | 2010-12-27 | Key-top structure, electronic device, and method of manufacturing key-top structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102714105A CN102714105A (en) | 2012-10-03 |
| CN102714105B true CN102714105B (en) | 2014-12-17 |
Family
ID=44226552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080059571.2A Expired - Fee Related CN102714105B (en) | 2009-12-28 | 2010-12-27 | Key-top structure and electronic device |
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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668436A (en) * | 2002-07-10 | 2005-09-14 | 3M创新有限公司 | Flexible mold and method of manufacturing microstructure using the same |
Family Cites Families (7)
| 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 |
| 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 |
| JP2007123231A (en) * | 2005-09-28 | 2007-05-17 | Shin Etsu Polymer Co Ltd | Cover member for push-button switch |
| JP2009009735A (en) * | 2007-06-26 | 2009-01-15 | Shin Etsu Polymer Co Ltd | Manufacturing method of keytop member |
| JP4436423B2 (en) * | 2007-08-28 | 2010-03-24 | 株式会社山口特殊印刷 | Key top film manufacturing method and key top film manufacturing machine |
| JP2009110778A (en) * | 2007-10-29 | 2009-05-21 | Sunarrow Ltd | Key sheet |
-
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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668436A (en) * | 2002-07-10 | 2005-09-14 | 3M创新有限公司 | Flexible mold and method of manufacturing microstructure using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5330220B2 (en) | 2013-10-30 |
| WO2011081148A1 (en) | 2011-07-07 |
| JP2011138702A (en) | 2011-07-14 |
| KR101347426B1 (en) | 2014-01-02 |
| KR20120106831A (en) | 2012-09-26 |
| CN102714105A (en) | 2012-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8022324B2 (en) | Method of manufacturing a keypad structure having a transparent keycap and keypad structure having a transparent keycap | |
| CN100435254C (en) | Keyboard and its mfg. method | |
| US20090057121A1 (en) | Key Base, Key Sheet and Method of Forming Key Base | |
| CN106444967A (en) | Waterproof notebook computer | |
| CN101300742A (en) | Waterproof in-mould foil (IMF) cover with two layers for a portable electronic device | |
| CN201773735U (en) | Keypad and electronic equipment adopting the same | |
| TW448455B (en) | Keyboard input device | |
| JPS6347213B2 (en) | ||
| CN101252050A (en) | Decorative key sheet for pushbutton switches | |
| US7759594B2 (en) | Thin key sheet and production method thereof | |
| CN102714105B (en) | Key-top structure and electronic device | |
| CN101488408B (en) | Press-key panel construction of electronic apparatus and manufacturing method thereof | |
| KR100538112B1 (en) | Button plate and personal portable device using a plastic sheet | |
| KR20100075527A (en) | Key sheet | |
| US20070221490A1 (en) | Keyboard and method for applying in-mold decoration technology to manufacture the keyboard with more key height and less key spacing | |
| JP2003323827A (en) | Member for push button switch and production process thereof | |
| WO2011040742A2 (en) | Keypad for a mobile terminal | |
| JP3516020B2 (en) | Method of manufacturing key sheet member for push button switch | |
| CN112673471A (en) | Flexible device including conductive traces with enhanced stretchability | |
| JPH1196848A (en) | Switch mechanism | |
| US20100102996A1 (en) | Dome array device and a key structure with the dome array device | |
| KR20050118079A (en) | Key pad for cellular phone made by plastic sheet | |
| CN212785435U (en) | Texture film and mobile phone rear cover | |
| KR101068089B1 (en) | Keypad for portable appliance and thereof manufacturing method | |
| JP3827532B2 (en) | Key sheet and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20181227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |