CN219800701U - Dustproof and waterproof membrane switch - Google Patents

Abstract

The utility model discloses a dustproof and waterproof membrane switch which comprises a panel layer, an upper circuit layer, an isolation layer, a lower circuit layer and a waterproof membrane layer, wherein the upper circuit layer is arranged below the panel layer, the lower circuit layer is arranged below the upper circuit layer, the isolation layer is arranged between the lower circuit layer and the upper circuit layer, a back plate layer is arranged below the lower circuit layer, a shell is fixed at the edge position of the top end of the back plate layer, keys are arranged on the upper surface of the panel layer, an inner sealing groove is arranged at the edge position of the upper surface of the panel layer, the waterproof membrane layer is arranged above the panel layer, an inner annular bulge and an outer annular bulge are respectively arranged at the bottom end of the waterproof membrane layer, and a plug connector is arranged on one side of the lower circuit layer. The utility model not only improves the dustproof and waterproof performance, but also can prevent the joint of the plug connector and the circuit layer from bending and damaging, and improves the heat dissipation effect of the film switch.

Description

Dustproof and waterproof membrane switch

Technical Field

The utility model relates to the technical field of membrane switches, in particular to a dustproof and waterproof membrane switch.

Background

The membrane switch is an operation system integrating key functions, indication elements and instrument panels, and is composed of panels, an upper circuit, an isolation layer and a lower circuit, wherein the contact of the upper circuit is deformed downwards to be contacted with a polar plate of the lower circuit for conduction by pressing the membrane switch, after a finger is loosened, the contact of the upper circuit is rebounded, the circuit is disconnected, a signal is triggered by a loop, the membrane switch is precise in structure, attractive in appearance, good in sealing performance, moisture-proof, long in service life and the like, and the membrane switch is widely applied to the fields of electronic communication and electronic measurement instruments, industrial control, medical equipment, automobile industry, intelligent toys, household appliances and the like.

The chinese patent of publication CN206516525U discloses a waterproof membrane switch, and it includes surface course, isolation layer, circuit layer and gum layer, the outside cladding one deck waterproof layer of circuit layer, the waterproof layer is surrounded with 360 angles and is protected the circuit layer not to receive the erosion of water or high humidity environment, consequently can realize membrane switch's water-proof effects on the basis that does not change membrane switch characteristics.

The waterproof membrane switch has the waterproof effect through the waterproof layer, but the waterproof layer can only play a waterproof role on a single circuit layer, when the surface of the membrane switch is soaked with water, water can still permeate into gaps among the surface layer, the circuit layer and the isolation layer, and the waterproof membrane switch has a general dustproof effect, dust easily enters the membrane switch, and damage can be caused in the long-term process, so that improvement is needed.

Disclosure of Invention

The utility model aims to provide a dustproof and waterproof membrane switch, which solves the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a dustproof waterproof film switch, includes panel layer, upper circuit layer, isolation layer, lower circuit layer and waterproof film layer, the upper circuit layer sets up in the below of panel layer, and upper circuit layer closely glues with the panel layer, the lower circuit layer sets up the below at the upper circuit layer, the isolation layer sets up between lower circuit layer and upper circuit layer, and the isolation layer glues with lower circuit layer and upper circuit layer respectively, the below of lower circuit layer is provided with the backplate layer, and backplate layer closely glues with lower circuit layer glues, the edge position department on backplate layer top is fixed with the shell, and the shell all glues with panel layer, upper circuit layer, isolation layer, lower circuit layer closely glues, just the top of shell is provided with the outer seal groove, the upper surface of panel layer all is provided with the button, the border position department of panel layer upper surface is provided with the inner seal groove, waterproof film layer sets up in the top of panel layer, waterproof film layer and panel layer closely glues, the bottom on waterproof film layer is provided with interior ring shape arch and outer ring shape arch respectively, interior ring shape arch and interior ring shape protruding and the inseparable joint, seal groove and outer circuit board of installing, seal groove one side is connected with the outer circuit layer closely.

Preferably, a heat dissipation cavity is formed in the back plate layer, and equally-spaced heat conducting fins are fixed in the heat dissipation cavity, so that heat dissipation in the membrane switch is facilitated.

Preferably, the surface of the waterproof film layer is adhered with a polyurethane film, and the polyurethane film has good anti-corrosion and anti-oxidation functions and can prolong the service life of the waterproof film layer.

Preferably, sealing rubber strips are adhered to the inner part of the inner sealing groove and the inner part of the outer sealing groove, and the sealing rubber strips are respectively and tightly adhered to the inner annular bulge and the outer annular bulge, so that the tightness of the inner sealing groove and the outer sealing groove is improved.

Preferably, the inside of protective structure has set gradually lag, elastic bulge, viscose glue, the junction cover of plug connector and lower circuit layer overlaps the lag, just the lag closely glues with lower circuit layer through viscose glue and glues, has played the effect of support to the tip of plug connector.

Preferably, elastic bulges are arranged on the inner wall of the protective sleeve and are tightly attached to the plug connector, so that the plug connector can be flexibly supported and positioned.

Preferably, through holes are formed in the side wall of the backboard layer between the heat conducting fins and are communicated with the heat dissipation cavity, so that the circulation of air in the heat dissipation cavity is guaranteed, and heat is taken away during circulation of air.

Compared with the prior art, the utility model has the beneficial effects that: the dustproof and waterproof film switch not only improves dustproof and waterproof performance, can prevent the joint of the plug connector and the circuit layer from bending and damaging, but also improves the heat dissipation effect of the film switch;

(1) The waterproof film layer, the inner annular bulge, the outer annular bulge, the inner sealing groove, the shell, the outer sealing groove and the sealing rubber strip are arranged, and the waterproof film layer is adhered above the panel layer, and meanwhile the shell wraps the whole film switch including the panel layer, the upper circuit layer, the isolation layer and the lower circuit layer, so that the waterproof film layer and the shell are matched, an omnibearing waterproof effect is achieved, the inner annular bulge and the outer annular bulge at the bottom end of the waterproof film layer extend to the inner sealing groove and the outer sealing groove respectively and are adhered with the sealing rubber strip, a double sealing structure is adopted, the sealing effect is good, dust and water can be well blocked, and the dustproof and waterproof performance is improved;

(2) The protective sleeve is sleeved at the joint of the plug connector and the lower circuit layer, the protective sleeve plays a role in supporting the end part of the plug connector, and the elastic bulge can flexibly support and position the plug connector, so that the joint of the plug connector and the lower circuit layer can be prevented from being bent and damaged;

(3) Through being provided with heat dissipation cavity, conducting strip, through-hole, because the inside of backplate layer is equipped with heat dissipation cavity, the inside conducting strip of heat dissipation cavity is convenient for with the inside heat transfer down of membrane switch, the circulation of the inside air of heat dissipation cavity has been guaranteed in the setting of through-hole to take away the heat in the lump when the circulation of air, thereby improved membrane switch's radiating effect.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

FIG. 3 is a schematic top view of a panel layer according to the present utility model;

FIG. 4 is an enlarged view of the protective structure of the present utility model;

FIG. 5 is an enlarged schematic view of a partial cross-section of a backsheet layer of the present utility model.

In the figure: 1. a panel layer; 2. an upper circuit layer; 3. an isolation layer; 4. a lower circuit layer; 5. a backing layer; 6. a waterproof film layer; 7. an inner seal groove; 8. an inner annular protrusion; 9. an outer annular protrusion; 10. a housing; 11. an outer seal groove; 12. a sealing rubber strip; 13. a key; 14. a plug-in component; 15. a protective structure; 1501. a protective sleeve; 1502. an elastic protrusion; 1503. a viscose; 16. a heat dissipation cavity; 17. a heat conductive sheet; 18. and a through hole.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

Referring to fig. 1-5, an embodiment of the present utility model is provided: a dustproof and waterproof membrane switch comprises a panel layer 1, an upper circuit layer 2, an isolation layer 3, a lower circuit layer 4 and a waterproof membrane layer 6, wherein the upper circuit layer 2 is arranged below the panel layer 1, and the upper circuit layer 2 is tightly adhered to the panel layer 1;

the lower circuit layer 4 is arranged below the upper circuit layer 2;

the isolation layer 3 is arranged between the lower circuit layer 4 and the upper circuit layer 2, and the isolation layer 3 is respectively adhered to the lower circuit layer 4 and the upper circuit layer 2;

a back plate layer 5 is arranged below the lower circuit layer 4, and the back plate layer 5 is tightly adhered to the lower circuit layer 4;

the inside of the back plate layer 5 is provided with a heat dissipation cavity 16, and equidistant heat conducting fins 17 are fixed in the heat dissipation cavity 16, so that the heat dissipation in the membrane switch is facilitated;

the side walls of the backboard layers 5 between the heat conducting fins 17 are provided with through holes 18, and the through holes 18 are communicated with the heat dissipation cavity 16, so that the air circulation in the heat dissipation cavity 16 is ensured, and heat is taken away together when the air circulates;

a shell 10 is fixed at the edge position of the top end of the back plate layer 5, the shell 10 is tightly adhered to the panel layer 1, the upper circuit layer 2, the isolation layer 3 and the lower circuit layer 4, and an outer sealing groove 11 is arranged at the top end of the shell 10;

the upper surfaces of the panel layers 1 are provided with keys 13;

an inner sealing groove 7 is arranged at the edge position of the upper surface of the panel layer 1;

the inner sealing groove 7 and the outer sealing groove 11 are internally adhered with the sealing adhesive tape 12, and the sealing adhesive tape 12 is respectively and tightly adhered to the inner annular bulge 8 and the outer annular bulge 9, so that the tightness of the inner sealing groove 7 and the outer sealing groove 11 is improved;

the waterproof film layer 6 is arranged above the panel layer 1, and the waterproof film layer 6 is tightly adhered to the panel layer 1;

the polyurethane film is adhered to the surface of the waterproof film layer 6, and has good anti-corrosion and anti-oxidation functions, so that the service life of the waterproof film layer 6 can be prolonged;

the bottom end of the waterproof film layer 6 is respectively provided with an inner annular bulge 8 and an outer annular bulge 9, the inner annular bulge 8 is tightly clamped with the inner sealing groove 7, and the outer annular bulge 9 is tightly clamped with the outer sealing groove 11;

a plug connector 14 is arranged on one side of the lower circuit layer 4, and a protection structure 15 is arranged at the joint of the plug connector 14 and the lower circuit layer 4;

the inside of the protection structure 15 is sequentially provided with a protection sleeve 1501, an elastic bulge 1502 and an adhesive 1503, the connection part of the plug connector 14 and the lower circuit layer 4 is sleeved with the protection sleeve 1501, and the protection sleeve 1501 is tightly adhered to the lower circuit layer 4 through the adhesive 1503;

elastic protrusions 1502 are arranged on the inner wall of the protective sleeve 1501, and the elastic protrusions 1502 are tightly attached to the plug connector 14;

because the protective cover 1501 is sleeved at the connection part of the plug 14 and the lower circuit layer 4, the protective cover 1501 plays a role in supporting the end part of the plug 14, and the elastic protrusions 1502 can flexibly support and position the plug 14, so that the connection part of the plug 14 and the lower circuit layer 4 can be prevented from being bent and damaged.

When the embodiment of the utility model is used, the following steps are adopted: firstly, because waterproof film layer 6 pastes the top at panel layer 1, the whole membrane switch parcel including panel layer 1 simultaneously, upper circuit layer 2, isolation layer 3, lower circuit layer 4 is lived to the shell 10, waterproof film layer 6 and shell 10 cooperation have played the omnidirectional waterproof effect, and the inside that inner annular bulge 8 and outer annular bulge 9 of waterproof film layer 6 bottom extended to inner seal groove 7 and outer seal groove 11 respectively and laminate with joint strip 12, adopt dual seal structure, the sealed effect is good, separation dust and water that can be fine, thereby dustproof waterproof performance has been promoted, then, because lag 1501 suit has played the effect of supporting in the junction of plug-in components 14 and lower circuit layer 4, elastic bulge's setting can carry out soft support location to plug-in components 14, thereby can prevent that the junction of plug-in components 14 and lower circuit layer 4 from taking place the buckling damage, and, because the inside of back sheet layer 5 is equipped with heat dissipation cavity 16, the inside fin 17 is convenient for with the inside heat transfer of membrane switch downwards, through-hole 18 sets up the heat dissipation effect has been guaranteed in the inside the heat dissipation cavity 16, the heat dissipation effect has been carried away in order to the membrane switch has been accomplished in the heat dissipation effect when the heat dissipation of the heat dissipation switch has been carried away to the heat dissipation effect of plug-in the plug components 14 has been carried out the effect of supporting, then, the effect of heat dissipation is accomplished in the heat dissipation of the heat dissipation has been completed to the heat dissipation effect.

Claims (7)

1. The utility model provides a dustproof waterproof membrane switch, its characterized in that includes panel layer (1), upper circuit layer (2), isolation layer (3), lower circuit layer (4) and waterproof membrane layer (6), upper circuit layer (2) set up in the below of panel layer (1), upper circuit layer (2) closely glues with panel layer (1), lower circuit layer (4) set up in the below of upper circuit layer (2), isolation layer (3) set up between lower circuit layer (4) and upper circuit layer (2), isolation layer (3) respectively with lower circuit layer (4) and upper circuit layer (2) glues, the below of lower circuit layer (4) is provided with backplate layer (5), backplate layer (5) closely glues with lower circuit layer (4), the edge position department on backplate layer (5) top is fixed with shell (10), shell (10) all glues with panel layer (1), upper circuit layer (2), isolation layer (3), lower circuit layer (4) closely, just top of shell (10) sets up between lower circuit layer (2), the top is provided with seal groove (7) on the top of panel layer (1), the top is provided with seal groove (7) top seal groove (1), waterproof thin film layer (6) closely glues with panel layer (1), the bottom of waterproof thin film layer (6) is provided with interior annular bulge (8) and outer annular bulge (9) respectively, and interior annular bulge (8) and interior seal groove (7) closely block, outer annular bulge (9) and outer seal groove (11) closely block, plug connector (14) are installed to one side of lower circuit layer (4), the junction of plug connector (14) and lower circuit layer (4) is provided with protective structure (15).

2. A dust-and-water-proof membrane switch as claimed in claim 1, wherein: the inner part of the backboard layer (5) is provided with a heat dissipation cavity (16), and equally-spaced heat conducting fins (17) are fixed in the heat dissipation cavity (16).

3. A dust-and-water-proof membrane switch as claimed in claim 1, wherein: the surface of the waterproof film layer (6) is adhered with a polyurethane film.

4. A dust-and-water-proof membrane switch as claimed in claim 1, wherein: the inner seal groove (7) and the outer seal groove (11) are internally adhered with sealing rubber strips (12), and the sealing rubber strips (12) are respectively and tightly adhered to the inner annular bulge (8) and the outer annular bulge (9).

5. A dust-and-water-proof membrane switch as claimed in claim 1, wherein: the inside of protective structure (15) has set gradually lag (1501), elastic bulge (1502), viscose (1503), the junction cover of plug connector (14) and lower circuit layer (4) has set lag (1501), just lag (1501) closely glues with lower circuit layer (4) through viscose (1503).

6. A dust-and-water-proof membrane switch as claimed in claim 5, wherein: elastic protrusions (1502) are arranged on the inner walls of the protective sleeves (1501), and the elastic protrusions (1502) are tightly attached to the plug connector (14).

7. A dust-and-water-proof membrane switch as claimed in claim 2, wherein: and through holes (18) are formed in the side wall of the backboard layer (5) between the heat conducting fins (17), and the through holes (18) are communicated with the heat dissipation cavity (16).