CN101179614B

CN101179614B - Mobile phone with waterproof keyboard

Info

Publication number: CN101179614B
Application number: CN2007100159361A
Authority: CN
Inventors: 王晓东; 王素真; 杨善强
Original assignee: Hisense Mobile Communications Technology Co Ltd
Current assignee: Hisense Mobile Communications Technology Co Ltd
Priority date: 2007-06-08
Filing date: 2007-06-08
Publication date: 2010-09-22
Anticipated expiration: 2027-06-08
Also published as: CN101179614A

Abstract

The invention provides a cell phone with waterproof keys, which solves such problems existed in the prior art as poor waterproof performance and high cost. The technical proposal of the invention includes the following steps: a sealing rubber groove with a special structure is formed around a key pad and a shell; then pasty resin adhesive with certain liquidity is infused into the special groove and permeates and covers apertures and structure grooves formed by the shell and keys; after the pasty resin adhesive is solidified after a certain period, the waterproof requirements of IP 67 level in GB150.1-86 can be effectively satisfied. Besides, the invention features low cost, easy operation, firmness and reliability.

Description

Mobile phone with waterproff keyboard

Technical field

The invention belongs to and relate to mobile phone, specifically relate to the device that mobile phone is realized keyboard place waterproof requirement.

Background technology

Development along with wireless telecommunications and electronic information technology, the range of application of electronic product more and more widely, electric property is being required propose under the prerequisite of high request more and more, open-air to satisfying, moist, under water, the electronic product, the especially water resistance of communication mobile phone that require under the particular surroundings such as storm propose higher requirement.

The prior mobile phone key water-proof structure adopts film coating technique in the mould usually, button and casing are made an integral body, yet this technology has the following disadvantages: 1. this operation process complexity, and wayward, film is fragile, and rate of finished products is low.2. die cost is than the high 4-5 of common die times, and equipment investment is big.

Other has a technical scheme to be, periphery inner at casing and that button cooperates is opened the groove of a closed curve, the button relevant position has outstanding convex tendon simultaneously, with casing groove interference fit, but it only relies on circuit board to compress button, and the circuit wooden partition is thin, long-term pressurized can produce distortion, thereby the local slit that produces causes seal failure, also can may produce the sealing-off phenomenon because of the related element on it of circuit board self-deformation.The components and parts of circuit board top weldering are when doing fall-down test, sealing-off, and circuit board is easily generally considered the requirement of cost and electronic product self thickness, can not do very thick, so the sealing load that produces can not guarantee higher seal request, the waterproof effect instability.

So reliable waterproofing design scheme is provided, must satisfies following the requirement:

1. consider the weatherability of product, satisfy different environmental requirements;

2. avoid the circuit board under the button to bear external force for a long time as far as possible;

3. simple in structure, realize that easily cost is low;

4. can bear the requirement of different depth hydraulic pressure test.

Summary of the invention

The invention provides a kind of mobile phone with waterproff keyboard, it is poor that it can solve the water resistance of prior art existence, problems such as cost height.

In order to reach the purpose that solves the problems of the technologies described above, technical scheme of the present invention is, a kind of mobile phone with waterproff keyboard, and it comprises casing, key pad, have several button holes on the casing, have several button heads on the key pad, key pad is contained in the casing, it is characterized in that described key pad is an integral sealing cushion, form the sealing groove between key pad periphery and the casing inner wall, be injected with fluid sealant in the described sealing groove, thereby key pad and casing are connected as a single entity.

In the present invention, also have following technical characterictic: described key pad periphery is the key pad wall, and the key pad wall outwards has a circle convex tendon, is the sealing groove between described key pad wall and convex tendon and the casing inner wall.

In the present invention, also have following technical characterictic: the convex tendon back side of described periphery has vertical convex tendon, and casing is formed with groove with vertical convex tendon opposite position, and described vertical convex tendon is contained in the described groove.In the present invention, also have following technical characterictic: described convex tendon is same injection moulding integral body with vertical convex tendon.

In the present invention, also have following technical characterictic: the contact-making surface of described key pad front, the back side and circuit board is the plane.

In the present invention, also have following technical characterictic: described key pad adopts silica gel, rubber or plastic cement to make.

In the present invention, also have following technical characterictic: described fluid sealant adopts resin glue.

In the present invention, also have following technical characterictic: described fluid sealant end face is lower than described sealing notch end face.

The present invention forms a sealing groove around key pad and casing, in groove, inject paste resin glue then with certain flowability, in the slit and structure groove that infiltration and covering casing and button form, after the placement certain hour solidifies, can effectively satisfy IP67 level waterproof requirement among the GB150.1-86, and cost is low, and is easy to operate, solid and reliable.

The present invention compared with prior art has the following advantages and good effect: 1. because key pad is integrally closed sealing gasket, the front can not leak, form the sealing groove at periphery, inject the paste resin glue in the groove, thereby periphery and the positive common sealing that forms, can seepage, there is not the seepage weak area, water resistance is reliable.2. simple in structure, it is easy and effective that technology realizes, rate of finished products greatly improves.3. key pad adopts silica gel material to make, elasticity is good, sealing is reliable, make key pad and casing form one by resin glue, solved the present situation that circuit board itself also serves as securing member, circuit board can not be out of shape, thereby has reduced the sealing-off phenomenon of circuit board, reduced failure rate, and then improved the useful life of electronic product.4. the specific convex rib structure form of key pad periphery makes sealing surface belt tortuous, injects the fluid sealant process, prevents that fluid sealant from infiltrating button area, and causes taking place the phenomenon of feel discomfort.5. cost is low, and sealing is lasting, is not subjected to the influence of external environment, can be widely used in the dustproof and waterproof structural design of the key board unit in the small-sized electronic product.

Description of drawings

The invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is button and the casing confined state outward appearance front view of mobile phone embodiment of the present invention;

Fig. 2 is the button of mobile phone embodiment of the present invention and the exploded view of casing;

Fig. 3-the 1st, mobile phone embodiment key pad front view of the present invention;

Fig. 3-the 2nd, mobile phone embodiment key pad of the present invention rear is to stereogram;

Fig. 4 is that mobile phone embodiment key pad of the present invention and casing do not assemble schematic diagram before the sealing;

Fig. 5 is the A-A cutaway view among Fig. 4;

Fig. 6 is an I position partial enlarged drawing among Fig. 5;

Fig. 7 assembles schematic diagram after mobile phone embodiment key pad of the present invention and the casing sealing;

Fig. 8 is the B-B cutaway view among Fig. 7;

Fig. 9 is an II position partial enlarged drawing among Fig. 8.

10. casing; 11. button hole; 12. keycap; 13. casing inner wall; 14. groove;

20. key pad; 21. button head; 22. convex tendon; 23. key pad wall; 24. key pad front; 25. key pad and circuit board contact-making surface; 26. vertical convex tendon; 27. convex tendon periphery and casing inner wall mating surface;

30. sealing groove;

40. fluid sealant.

Embodiment

As Fig. 1, have button hole 11 on the casing 10, button adopts common p+r material,

Referring to Fig. 2, Fig. 3-1 and Fig. 3-2, key pad 20 has several button heads 21, is with keycap 12 on the button head 21, by shake-up keycap 12, and then makes button head 21 interlocks, complete operation.

Key pad 20 adopts elasticity and the good silica gel of corrosion resistance to make.Key pad 20 is an integral sealing face, and water can not flow into the circuit board of key pad back from the front.A black shadow shield can also be equipped with in key pad 20 fronts, is attached to key pad 20 fronts, and shadow shield is the diaphragm that plastic material is made, and the about 0.2-0.4mm of thickness is not shown, to play the effect of shading and dash.

From Fig. 2, as can be seen, be key pad wall 23 around the key pad 20 among Fig. 3-1 and Fig. 3-2, key pad wall 23 outwards is formed with a circle convex tendon 22, and convex tendon 22 forms enclosed curve regions, so that button wall 23 and convex tendon 22 form the part of sealing groove 30.Key pad wall 23 end faces to the height between the convex tendon 22 should highly come to determine that general sealing height should be lower than key pad wall 23 end faces to the height between the convex tendon 22, to avoid to excessive glue with sealing.Being lower than height should determine according to factors such as concrete types.

The contact-making surface 25 of front 24, the back side and the circuit board of key pad 20 is the plane.The front is that the plane can ponding.The back side is that the such key pad 20 in plane can be fitted closely good sealing effect with circuit board.

Referring to Fig. 4, key pad 20 is packed in the casing 10, the convex tendon periphery is matched in clearance with casing inner wall mating surface 27 with casing inner wall 13, and key pad wall 23, convex tendon 22 form sealing groove 30 with the inwall 13 of casing 10, and sealing groove 30 forms the sealing area of sealing around a circle.For mobile phone, sealing groove 30 spacings are usually at 0.8mm-5mm, and in the present embodiment, the spacing of sealing groove 30 is about about 2.2mm, and the size of spacing generally will be determined according to factors such as type, key pad 20 and casing 10 sizes.

Referring to Fig. 5 and Fig. 6, for fear of in the injecting glue process, make fluid sealant 40 enter button head 21 zones, cause button head 21 senses of touch to descend, feel is bad, convex tendon 22 back sides have vertical convex tendon 26, and casing 10 is formed with groove 14 with vertical convex tendon 26 opposite positions, and vertical convex tendon 26 is contained in the groove 14.Constitute four sections zig zag planes like this, make fluid sealant 40 processes around in the zig zag plane process, the glue that can not overflow is to button head 21 zones.

Referring to Fig. 7, this is the situation behind the injection fluid sealant 40, as can be seen from Figure 7, along injecting fluid sealant 40 in the formed sealing groove 30 of convex tendon 22 1 circles, form the effective sealing between key pad 20 and the casing 10, and key pad 20 and casing 10 are connected as a single entity, the zone that sealing groove 30 and key pad 20 surround jointly is exactly a sealing area, the sealing zone can be with electric elements covers such as circuit boards within it, thereby reach waterproof effect.

During sealing, only need fixedly casing 10, put key pad 20 well, molding machine is according to the shape and size of adhesive area, and input program is along the closed curve injection resin glue of adhesive area, the continuity that guarantees the sealing curve gets final product, and after placement was solidified in about 4 hours after having sealed, can reach the excellent waterproof effect.Through repeatedly experiment detection, can satisfy IP67 level waterproof requirement among the GB150.1-86 fully.

Referring to Fig. 8 and Fig. 9, fluid sealant 40 is filled in the sealing groove 30, and fluid sealant 40 end faces will be lower than sealing groove 30 end face ports, avoids injecting resin glue 40 and exceeds button and circuit board mating surface.

In the groove 14 of casing 10, the multistage sealing zig zag plane thereby formation is gone in ring makes fluid sealant 40 in the injecting glue process, can not enter button head 21 zones from the slit because vertical convex tendon 26 is packed into.When having avoided sealing, behind the gap between the casing inner wall 13 of glue infiltration convex tendon 22 peripheries and formation sealing groove 30, further get over the gap between sealing groove 30 bottom surfaces and the key pad periphery convex tendon end face, flow into positive button area, cause the button feel of button bad.

From above structure as can be seen, the present invention adopts positive face seal key pad, and periphery adopts the sealing groove, thereby has realized the function of waterproof effectively.

This programme is simple in structure, and it is convenient, reliable for effect to realize, is not subjected to the influence of external environment, can be widely used in the dustproof and waterproof structural design in the small-sized electronic product.

The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection range of technical solution of the present invention according to technical spirit of the present invention.

Claims

1. mobile phone with waterproff keyboard, it comprises casing, key pad, have several button holes on the casing, have several keycaps on the key pad, key pad is contained in the casing, it is characterized in that described key pad is an integral sealing cushion, form the sealing groove between key pad periphery and the casing inner wall, be injected with fluid sealant in the described sealing groove;

Described key pad periphery is the key pad wall, and the key pad wall outwards has a circle convex tendon, is the sealing groove between described key pad wall and convex tendon and the casing inner wall;

The convex tendon back side of described periphery has vertical convex tendon, and casing is formed with groove with vertical convex tendon opposite position, and described vertical convex tendon is contained in the described groove.

2. mobile phone according to claim 1 is characterized in that described convex tendon and vertical convex tendon are same injection moulding integral body.

3. mobile phone according to claim 2 is characterized in that the contact-making surface of described key pad front, the back side and circuit board is the plane.

4. mobile phone according to claim 3 is characterized in that described key pad adopts silica gel, rubber or plastic cement to make.

5. mobile phone according to claim 4 is characterized in that described fluid sealant adopts resin glue.

6. according to any described mobile phone of claim in the claim 1 to 5, it is characterized in that described fluid sealant end face is lower than described sealing notch end face.