CN1224906A - Push button switch covering assembly - Google Patents
Push button switch covering assembly Download PDFInfo
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- CN1224906A CN1224906A CN 98104037 CN98104037A CN1224906A CN 1224906 A CN1224906 A CN 1224906A CN 98104037 CN98104037 CN 98104037 CN 98104037 A CN98104037 A CN 98104037A CN 1224906 A CN1224906 A CN 1224906A
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- card
- push button
- button switch
- diaphragm
- taken
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Abstract
The push button switch covering assembly of the invention comprises a push button switch covering member made from a transparent rubbery material and a clicking member with a clicking diaphragm below the covering member which imparts the operator's finger tip with a sharp feeling of clicking when the key top of the covering member is depressed. Different from a conventional push button switch covering assembly of this type, in which the pushing load on the key top is transmitted to the top of the clicking diaphragm through a downward protrusion on the lower surface of the key top, the pushing load on the key top in this invention is transmitted to the clicking diaphragm by means of an upwardly raised part formed on the top of the upper surface of the upwardly convex clicking diaphragm so that the flat lower surface of the key top is fully available for forming a layer of indicia to indicate the particular function of the push button switch through the transparent key top without the disadvantage of wearing of the indicia as in the case where the indicia layer is formed on the upper surface of the key top.
Description
The present invention relates to a kind of push button switch covering assembly (push button switch covering assembly), more particularly, relate to a kind of push button switch covering assembly, it comprises that a push button switch covering element (push buttonswitch covering member) and a card that is positioned under it take element (clicking member), when pressing the button closed circuit of switch, except very little switch bump, it can be with sharp-pointed but a finger tip of feeling to pass to the operator that pleasant card is taken.Such push button switch covering assembly is used for many Electrical and Electronic instruments, such as the remote controller of hand-held calculator, Electrical and Electronic equipment, phone panel etc., is used for to the instrument input operation signal.
Accompanying drawing 7 shows an exemplary of the push-button switch unit of prior art with the form of a vertical cross section, and it is made up of the base plate 28 that a push button switch covering element 21 and is used for input signal.Push button switch covering element 21 is by elastomeric material (as silicon rubber) global formation.The push button switch covering element is a single piece, it comprises: button lid (key top) 22, one pedestal (base plate), 24 and one thin-walled necking section (riser part) 23, it connects button lid 22 and pedestal 24, and, when pushing button, operator's finger tip covers 22, make the pair of fixed contacts 29 on the base plate 28 of movable contact 25 and switch element on the lower surface of the part 27 of stretching out on the button lid 21 contact downwards, during with the circuit of 29 of closed fixed contacts, necking section 23 can strains.In this assembly, the strain of necking section 23 is preferably taken simultaneously with the card that is caused by bending and is taken place, so that operator's finger tip receives a clear and definite sensation that contacts with switch.Usually, the upper surface of button lid 22 has skim 26, prints or adhere to the label of a marking or wear-resisting mark in the above, as formation such as numeral, symbol and patterns.
A problem that exists in the above-mentioned push button switch covering element of being made by elastomeric material (as silicon rubber) 21 is: because elastomeric material is compared with traditional plastic resin, has higher plasticity, the card that causes by bending take phenomenon only down by bump enough could take place greatly the time, and this can only be by increasing switch element button lid 22 and the distance of 28 of base plates realize, even card is taken phenomenon and taken place, the sensation that is delivered to operator's finger tip also can be very weak and quite fuzzy.Much less, the big distance of 28 of button above-mentioned lid 22 and base plates is opposite with the as far as possible little portable designing requirement of the thickness of push-button switch unit in the modern electronic equipment.
Accompanying drawing 8 shows the improvement embodiment of the push button switch covering assembly of a prior art by a vertical sectional view, wherein, button lid 22 following by in hit quite for a short time, the necking section 23 of pressure button cover element 21 no longer is to cause pushing button cover in 22 to produce by bending to block the main cause of taking phenomenon.The substitute is a card and take element 32, it is to be made by a quite hard plastic resin (as PETG), and it has down a fluted body click diaphragm 30; Be positioned under the button lid 22, contact with the compactor of giving prominence to downwards 33.Element 32 taken by card and push button switch covering element 21 bonds together by viscose glue usually.By with compactor 33 over against card take and stamp the conduction seal China ink that comprises carbon granule on the lower surface of diaphragm 30, and form a contact point 25 movably.When operator's finger tip pushes button when covering 22, card is taken diaphragm 30 and also is pressed by the compactor on it 33, and therefore, the fixed contact 25 that card is taken on the lower surface of diaphragm 30 contacts with fixed contact (demonstration among Fig. 8) on the base plate.At this moment, even press stroke instantly less than 0.5 to 0.7mm the time, card is taken diaphragm 30 and still can be produced elastic bending deflection, thereby a sharp-pointed and clear and definite card is taken the finger tip of feeling to be delivered to the operator.
Problem in each embodiment of the push button switch covering assembly shown in Fig. 7 and Fig. 8 is: since provide on the lower surface of the button of push button switch covering element 21 lid 22 one down flange 27 or the compactor 33 that extends downwards, the lower surface of button lid 22 can not be used for typographic(al) mark, and mark layer 26 can only be arranged at the upper surface of button lid 22.Much less, this design that button covers the mark layer 26 on 22 upper surfaces is imperfect, because the friction of operator's finger tip or press down repeatedly after mark is rubbed, after after a while, can be worn or fade.
As the wearing and tearing of the mark on the upper surface of the above-mentioned button lid 22 that is formed at push button switch covering element 21 or a solution of COLOR FASTNESS PROBLEM; an improvement to embodiment shown in Figure 8 has been proposed; wherein; as at Fig. 9 by shown in the vertical sectional view, be positioned at the protection that mark layer 26 that button covers 22 upper surfaces is subjected to the bonding button lid protective layer 22A that is made by a transparent material thereon.In this embodiment, mark layer 26 can not be worn, because mark layer 26 is not exposed, but is clipped between button lid 22 and the button lid protective layer 22A.Embodiment shown in Figure 10 is the further improvement to embodiment shown in Figure 9, and wherein, button lid 22 is easily deformable film shapes, has saved necking section shown in Figure 8 23.Yet; Fig. 9 and each embodiment shown in Figure 10 are still defective; because the button that transparent material is made lid protective layer 22A must separate preparation with push button switch covering element 21; and each the button lid protective layer 22A that separately prepares must bond together with definite position and each button lid 22 usefulness adhesives one by one, thereby has increased the production cost of push button switch covering assembly greatly.
Therefore, the purpose of this invention is to provide the modified model push button switch covering assembly of a novelty, it is taken element and is formed by a push button switch covering element and a card, does not have the problem and the defective that exist in the assembly of above-mentioned prior art, and can produce with an extremely low cost.
Like this, push button switch covering assembly of the present invention comprises:
(A) form a push button switch covering element of an overall configuration by a printing opacity elastomeric material, comprising:
(a) button lid, its lower surface is flat.
(b) pedestal and
(c) a thin-walled necking section, it connects button lid and pedestal, places on the smooth lower surface of button lid, and has one deck show tags; With
(B) card of being made by plastic resin is taken element, and it has a card protruding upward to take diaphragm, is facing the smooth lower surface of button lid in the push button switch covering element,
In the central authorities that card protruding upward is taken diaphragm, card is taken element a part that protrudes upward or a flange, towards the lower surface of button lid.
Figure 1A and Figure 1B are respectively the vertical sectional view that push button switch covering assembly of the present invention is in normal condition and down state.
Fig. 2 A and Fig. 2 B be respectively in the push button switch covering assembly of the present invention the push button switch covering element and the card take element vertical sectional view.
Fig. 3 A and Fig. 3 B are respectively the vertical sectional view that push button switch covering assembly is in a normal condition and a down state, do not have outstanding compactor in this push button switch covering assembly downwards, and the central authorities that take diaphragm at card do not protrude upward part yet.
The vertical sectional view of the push button switch covering element of the button lid that Fig. 4 is a smooth type, do not project upwards.
Fig. 5 is the vertical sectional view of a different flat type push button switch covering element embodiment, the button lid that it does not project upwards, but a part of stretching out is downwards arranged.
Fig. 6 one has the vertical sectional view of the push button switch covering element of a button lid that projects upwards and a downward extension.
Fig. 7 and 8 is respectively the vertical sectional view that the push button switch covering assembly of a prior art does not have and has a card to take element.
Fig. 9 and 10 is respectively the vertical sectional view of the push button switch covering assembly of dissimilar prior art, and they have a card and take element and button lid protective layer is arranged on the pressure button cover element.
As mentioned above, the most significant feature of push button switch covering assembly of the present invention shown in Figure 1A and the 1B is: Replace outstanding compactor 33 (seeing Fig. 8) downwards, put on button and cover the lower of 3 upper surfaces and pass through by power P Being formed at card takes and protrudes upward part on diaphragm 7 upper surfaces or flange 8 passes to card and takes diaphragm 7. Upwards Extension or flange 8 preferably use a binding agent to bond to the upper table that card is taken diaphragm 7 by adhesion strength Face replaces and takes diaphragm 7 with the card of extension or flange 8; As shown in Figure 6, as by being printed on Form after the mark layer 6 on the smooth lower surface of button lid 3, consider and simplify production process and from the back of the body The littler inhomogeneities of visibility in the side light situation is being covered element 1 by the way that binding agent is bonding Button lid 3 on a downward extension or flange 8 are provided is optional.
The material of push button switch covering element 1 is the silicon rubber with transparency preferably, although also can make With rubber and the synthetic rubber resin of other printing opacity, comprise polyamide copolyether, polyester, polyester-Copolyether, polyurethane, polyolefin, SB and ethylene-propylene-diene Terpolymer.
On the other hand, the material that card is taken element 2 is a plastic resin, and it should have preferably stability, Have simultaneously high-fire resistance, the high glass transition point, low thermal coefficient of expansion is with relevant with hot strength good Good mechanical property, ultimate elongation and Yang Shi modulus, and at pressing mold (compression molding) with draw Good plasticity during mould (draw molding). Consider to have enough consistency and elasticity moduluses, close The example of suitable resin material comprises the PETG with polyester chain and gathers the naphthalene diformazan The acid glycol ester. Other has the plastic resin of 110 ℃ or higher glass transition point, such as poly-carbonic acid Ester, polyether sulfone, PEI, polysulfones and polybutylene terephthalate (PBT) etc. also can be taken unit as card The material of part 2.
Below, will by with reference to the accompanying drawings, describe several embodiments of the present invention in detail.
Figure 1A and 1B show respectively the button of the present invention's one typical embodiments by a vertical sectional view The switch cover assembly is in normal condition and lower situation by state, covers on 3 with button press down in the state Arrow P represents downward power.
Shown in Figure 1A, cover element 1 comprises button lid 3; Pedestal 10; Necking section 4 and card Take element 2, their adhesive linkages 5 below pedestal 10 bond together. The button lid of cover element 1 3 have a smooth lower surface, form the coating 6 of show tags pattern on it, as passing through printing. Card is taken The middle body of element 2 forms a dome-shaped diaphragm, and it is recessed down or protruding upward, plays card and takes film The effect of sheet 7. Take the flange 8 that there is a projection at diaphragm 7 tops or makes progress at card, facing to button lid 3 Lower surface. Jut 8 can be taken diaphragm 7 whole formation by whole mold and card, also can use sticking The knot agent forms by the bonding disc sheet of opening preparation in one minute. The lower surface of taking diaphragm 7 at card has one can Current collector 9 is just in time relative with jut 8.
When the finger tip by the operator applies one during to the load P that presses down to the upper surface of button lid 3, as Shown in Figure 1B, connect in the thin-walled necking section 4 of button lid 3 and the pedestal 10 of cover element 1 at each Produce a buckling phenomenon, and card is taken diaphragm 7 and clear, a definite card is taken is felt to be delivered to the operator's Finger tip, card are taken fixing the touching on the base plate of movable contact 9 and switch element on the lower surface of diaphragm 7 Enough contacts contact with each other them between the some (not shown), thus closed circuit.
Fig. 2 A and 2B show cover element 1 by a vertical sectional view respectively and card is taken element 2. Figure Assembly of the present invention shown in the 1A is to be fixed on card and to take element 2 by will cover element 1 at its pedestal 10 places On, and utilize a bond layer 5 that they are bonded together to consist of. With the enforcement side shown in Figure 1A The lower surface that contacts with the base plate (not shown) that case difference, the card shown in Fig. 2 B are taken element 2 has a pad Sheet 12 is to adjust the switch intermediate range between the fixed contact of movable contact 9 under it. This with pad It is favourable that 12 card is taken element 2 because card take element 2 can be with a thin plastic sheet with uniform thickness Form, thereby greatly reduce the manufacturing cost that card is taken element 2. Can provide a passage at pad 12, Can not have yet, take diaphragm 7 when card and be used for discharged air when pressing down. The selection of the thickness of pad 12 should Use between the fixed contact on current collector 9 and the base plate and can obtain enough contacts, but it usually should Smaller than the thickness that blocks the jut 8 of taking diaphragm 7 tops.
Compare with the embodiment shown in the 1B with Figure 1A, Fig. 3 A and 3B show the similar but different embodiment of this assembly one with a vertical sectional view, wherein, the central authorities that card is taken diaphragm 7 do not have upwards jut or the flange 8 shown in Figure 1A and the 1B, and the lower surface of button lid 3 is flat.When button lid 3 is pressed by a load P, take generation one opposite curvature in the diaphragm 7 at card, thereby the central authorities that take the lower surface of the central authorities of diaphragm 7 and button lid 3 at card form a gap, shown in Fig. 3 B, therefore, can not get clear and definite contact pressure between the contact, the sensation that card is taken can not be delivered to operator's finger tip.The reason of this defective too big cause of initial contact area that the chances are between the upper surface that the lower surface and the card of button lid 3 are taken diaphragm 7.This problem can solve with the area that card is taken the lower surface that diaphragm 7 contacts by reducing button lid 3.Have the enough big-and-middle definite card that hits and take sensation for obtaining one, the diameter that card is taken diaphragm 7 preferably is less than 6mm, on the other hand, is to cover 3 o'clock experience difficulties at the button that design has a lower surface of reduced size.
Therefore, card is taken on the upper surface of diaphragm 7 upwards the diameter of jut 8 and is taken diaphragm 7 itself less than card.Upwards the surface area of jut 8 is preferably in card and takes within 15% to 50% scope of surface area of diaphragm 7.
Be substituted in card and take the upwards other method of jut 8 of diaphragm 7 tops formation one, shown in one of Fig. 6 vertically analyses and observe, after on the lower surface of button lid 3, forming a mark layer 6, for example, the resin (ultraviolet-curable resin) by using a ultraviolet curable is formed centrally one to lower flange 8 in the lower surface of button lid 3.
Fig. 4 shows a dissimilar push button switch covering element 1, be called plate, it does not have thin-walled necking section 4 shown in Figure 1A and heavy button lid 3, but these two parts are integrated into a thin elastically deformable film, even thereby the card shown in this cover element and Fig. 2 B take element and be assembled together, the general thickness of this push-button switch unit is reduced greatly.Shown in the vertical sectional view of Fig. 5, the central authorities of the lower surface of template cover element 1 shown in Figure 4 can provide a downward flange 8, are substituted in the upper surface that the card that is assembled together with plate cover element 1 is taken element 7 and form a jut upwards.In assembly, also a sharp-pointed and definite card can be taken the finger tip of feeling to be delivered to the operator with this plate cover element.
Much less, the purpose of the various embodiments shown in the description accompanying drawing is for example rather than limits.Although each figure only shows a single cover element, one single card is taken no part or their combination, all be a plurality of so single cover elements and card to be taken element combine traditionally, switch element of button more than one and their cover element are linked together at the pedestal place with different structure.
Below, describe advantage of the present invention in detail with an embodiment.
Embodiment
By a kind of silicon rubber (KE-951U with 100 parts of weight, a kind of product of Shin-Etsu Chemical Co.) a kind of vulcanizing agent (C-8A, a kind of product of Shin-Etsu Chemical Co) with 0.5 part of weight evenly is mixed and made into a kind of printing opacity sulphurated siliastic raw material.This silicone rubber material is incorporated in the metal die, at 180 ℃ temperature and 200kgf/cm
2Pressure under be compression molded into silicon monosulfide rubber button switch cover element, it comprises that the thick pedestal of a 0.5mm, the thin-walled necking section and that 0.2mm is thick have the button lid of smooth lower surface, shown in the vertical sectional view among Fig. 2 A.Then, use silicone base seal China ink to form a mark layer at the smooth lower surface of button lid by screen printing.
Prepare the card of one shown in Fig. 2 B with the thick pet resin sheet of a 0.1mm separately by drawing-die and take element, it has the card of a 5mm diameter recessed down and takes diaphragm.Be that by the conductive ink that uses a carbon containing card takes the central authorities of diaphragm lower surface and form a conductive layer as the 3mm diameter of movable contact.Then, by dripping liquid resin (the Seikabeam SCR-SP-1 of some ultraviolet curable, a kind of product of Dainichi Seika Kogyo Co.) taking diaphragm central authorities formation diameter at card is 2.5mm, highly be the upwards jut of 0.15mm and this resin of ultraviolet irradiation that sends with high-pressure mercury lamp, thereby make resin solidification.For air is discharged, use the binding agent pet film that one 0.025mm is thick to bond to card and take diaphragm card on every side and take the element lower surface.Like this, block the switch stroke of taking diaphragm and be adjusted to 0.5mm.
Taking element and cover element by the card that uses a kind of binding agent to make like this bonds together and forms an assembly being shown in Figure 1A.This binding agent is by a kind of silicon rubber (KE) 106LTV with 100 parts of weight, a kind of product of Shin-Etsu Chemical Co.) a kind of vulcanizing agent (Catalyst RG, a kind of product of Shin-Etsu Chemical Co.) with 10 parts of weight is mixed and made into.
Assembly gross thickness except that the button lid that cover element of making like this and card are taken element is 0.95mm, when the lid that pushes button is used for switch, although the very P cock stroke of 0.5mm, this assembly still can be taken the finger tip of feeling to be delivered to the operator with a sharp-pointed and pleasant card.
Claims (5)
1. a push button switch covering assembly, it comprises:
(A) a push button switch covering element forms an overall structure by a printing opacity elastomeric material, and it comprises:
(a) button lid, its lower surface is flat,
(b) pedestal and
(c) a thin-walled necking section, it connects button lid and pedestal, and on the smooth lower surface of button lid one deck show tags is arranged; With
(B) card of being made by plastic resin is taken element, there is a card protruding upward to take diaphragm, smooth lower surface towards the button of push button switch covering element lid, card is taken element and is taken diaphragm upper surface central authorities at card protruding upward one upwardly projecting portion is arranged, upwards jut is towards the smooth lower surface of button lid, and taking at card has a contact movably on the lower surface of diaphragm.
2. push button switch covering assembly as claimed in claim 1, wherein, the printing opacity elastomeric material that forms the push button switch covering element is a kind of silicon rubber.
3. push button switch covering assembly as claimed in claim 1, wherein, the plastic resin that the formation card is taken element is a kind of pet resin or polybutylene terephthalate (PBT) resin.
4. push button switch covering assembly as claimed in claim 1, wherein, card protruding upward is taken on the upper surface of diaphragm the surface area of jut upwards in card is taken 15% to 50% scope of surface area of diaphragm.
5. push button switch covering assembly as claimed in claim 1, wherein, the thin-walled necking section of button lid and push button switch covering element is combined into a flat film form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98104037 CN1224906A (en) | 1998-01-24 | 1998-01-24 | Push button switch covering assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98104037 CN1224906A (en) | 1998-01-24 | 1998-01-24 | Push button switch covering assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1224906A true CN1224906A (en) | 1999-08-04 |
Family
ID=5218151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98104037 Pending CN1224906A (en) | 1998-01-24 | 1998-01-24 | Push button switch covering assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463088C (en) * | 2005-04-26 | 2009-02-18 | 乐金电子（昆山）电脑有限公司 | Button assembly and its production |
-
1998
- 1998-01-24 CN CN 98104037 patent/CN1224906A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463088C (en) * | 2005-04-26 | 2009-02-18 | 乐金电子（昆山）电脑有限公司 | Button assembly and its production |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |