CN211404375U - Membrane switch - Google Patents

Abstract

The utility model discloses a membrane switch, including from top to bottom according to the preface setting and mutual adhesive panel layer, the fixed bed, the slice glue film in a middle of, circuit piece and gum line, be provided with the circuit matrix on this circuit piece, this circuit matrix includes a plurality of circuit units, each circuit unit sets up in the tie point around pressing the contact including one pressing contact and a plurality of encircles, wherein two tie points disconnection of each circuit unit and all the other adjacent tie points between form the tie point circuit through silver thick liquid circuit interconnect, the region that presses the contact that this fixed bed corresponds each circuit matrix is formed with punches a hole, this fixed bed is formed with the preforming that corresponds to pressing the contact along punching a hole marginal inwardly extending, the slice glue film in this middle of is provided with a metal shrapnel corresponding to each circuit unit. The utility model discloses membrane switch punches a hole and forms the preforming along punching a hole inwards extending through the regional formation of pressing the contact that corresponds the circuit matrix at the fixed bed to strengthen membrane switch's sense of touch, improve user experience.

Description

Membrane switch

Technical Field

The utility model relates to an electronic switch technical field especially relates to a membrane switch.

Background

The fixed plate of the existing membrane switch mostly adopts a whole PET plate, the pressing hand feeling is general, a user cannot know whether the switch is correctly pressed, the user cannot judge whether the switch is pressed wrongly or fails, the user experience is poor, and the updating and the maintenance of the switch are not facilitated.

In view of the above, there is a need to provide a membrane switch that can solve the above-mentioned drawbacks to provide better touch feeling and improve user experience.

Disclosure of Invention

The utility model aims to solve the technical problem that a membrane switch is provided in order to provide better sense of touch, improves user experience.

In order to solve the technical problem, the utility model discloses a as follows technical scheme: the utility model provides a membrane switch, its includes panel layer, fixed bed, the interplanar glue film of space, circuit piece and the gum layer that from top to bottom sets up according to the preface and bonds each other, be provided with the circuit matrix on the circuit piece, the circuit matrix includes a plurality of circuit units, and each circuit unit sets up in the tie point around pressing the contact including one pressing the contact and a plurality of encircles, and wherein two adjacent tie points disconnection of each circuit unit and all the other adjacent tie points between form the tie point circuit through silver thick liquid circuit interconnect, the fixed bed corresponds each the region of pressing the contact of circuit matrix is formed with punches a hole, the fixed bed is formed with the preforming that corresponds to pressing the contact along punching a hole marginal inward extension, the interplanar glue film is provided with a metal shrapnel corresponding to each circuit unit.

The further technical scheme is as follows: the pressing sheet comprises a connecting end and a tail end, one end of the connecting end is connected with the edge of the punched hole, the other end of the connecting end is connected with the tail end, and the tail end corresponds to the center of the pressing contact.

The further technical scheme is as follows: the ends are of a circular configuration.

The further technical scheme is as follows: the circuit matrix press the contact through silver thick liquid circuit row connection or row connection and form the contact transmission line, the tie point circuit passes through silver thick liquid circuit row connection or row connection and forms the connection transmission line, the pin end of contact transmission line and the pin end and a cable conductor connection of connecting the transmission line.

The further technical scheme is as follows: each the lead wire end of contact transmission line and the lead wire end of connecting the transmission line are electrically conductive pressfitting respectively and are had a welding terminal, the cable conductor is including wired cover and many parcel in the wire in the cover, the one end and the corresponding lead wire end of welding terminal are connected, and its other end is connected with one of them wire of cable conductor.

The further technical scheme is as follows: the back glue layer is a double-sided adhesive tape.

The further technical scheme is as follows: and a surface adhesive layer used for bonding the panel layer and the fixing layer is arranged between the panel layer and the fixing layer.

The further technical scheme is as follows: the number of the connection points of each line unit is four, and the connection points are distributed at equal intervals around the periphery of the corresponding pressing contact.

The further technical scheme is as follows: the fixed layer is a PET film with the thickness ranging from 50um to 75 um.

The further technical scheme is as follows: the panel layer is a transparent PET film, and the back surface of the panel layer is printed with a key pattern.

The utility model has the advantages of: the membrane switch is punched a hole through the area that the fixed layer corresponds the press contact of circuit matrix and inwards extends along punching a hole and forms the preforming that corresponds the press contact to strengthen membrane switch's sense of touch, provide better feeling, improve user experience.

Drawings

Fig. 1 is a schematic structural diagram of the membrane switch of the present invention;

fig. 2 is a schematic structural diagram of the circuit sheet of the membrane switch of the present invention;

fig. 3 is a schematic structural diagram of a fixed layer of the membrane switch of the present invention;

fig. 4 is an exploded schematic view of the membrane switch of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1 to 4, in the present embodiment, the membrane switch 10 is configured to be disposed on an electrical appliance to control an operation of the electrical appliance, and the membrane switch 10 is electrically connected to a control circuit board of the electrical appliance. The electrical appliance comprises household appliances or medical equipment and other equipment needing on-off control.

The membrane switch 10 comprises a panel layer 110, a fixing layer 120, a spacer surface glue layer 130, a circuit sheet 140 and a back glue layer 170 which are arranged from top to bottom in sequence and are mutually bonded, the circuit sheet 140 is provided with a circuit matrix 101, the circuit matrix 101 includes a plurality of circuit units 1011, each circuit unit 1011 includes a pressing contact 1012 and a plurality of connection points 1013 arranged around the pressing contact 1012, two adjacent connection points 1013 of each circuit unit 1011 are disconnected and the other adjacent connection points 1013 are connected with each other through a silver paste line to form a connection point line 1014, the fixing layer 120 is formed with punched holes 121 corresponding to the areas of the press contacts 1012 of each of the circuit matrices 101, the fixing layer 120 is formed with pressing tabs 122 corresponding to the pressing contacts 1012 extending inward along the edges of the punched holes 121, the interlayer side adhesive layer 130 is provided with a metal elastic sheet 131 corresponding to each circuit unit 1011. By forming the punched holes 121 in the area of the fixed layer 120 corresponding to the press contacts 1012 of the circuit matrix 101 and extending the pressing sheets 122 corresponding to the press contacts 1012 inwards along the punched holes 121, the touch feeling of the membrane switch 10 is enhanced, a better hand feeling is provided, and the user experience is improved. The metal elastic sheet 131 is disposed between the pressing sheet 122 of the fixing layer 120 and the pressing contact 1012, and is separated from the pressing contact 1012 in an initial state, and after being pressed, the metal elastic sheet 131 is in contact with the pressing contact 1012 to be conducted, so that the thin film switch 10 is used to control the electric appliance to operate.

Specifically, the inter-sheet adhesive layer 130 may be made of a double-sided adhesive tape, a square hole is formed in the inter-sheet adhesive layer 130 corresponding to each of the circuit units 1011, and the metal elastic sheet 131 is disposed in the metal elastic sheet corresponding to the square hole so as to correspond to each of the circuit units 1011.

Specifically, in the present embodiment, the pressing piece 122 includes a connection end 1221 and a terminal 1222, the connection end 1221 is connected to an edge of the punching hole 122 at one end, and is connected to the terminal 1222 at the other end, and the terminal 1222 corresponds to the center of the pressing contact 1012. Preferably, the end 1222 is a circular structure.

Specifically, in the present embodiment, the number of the connection points 1013 of each of the line units 1011 is four, and the connection points are equally spaced around the periphery of the corresponding pressing contact. Wherein, the connection points 1013 enclose a square structure.

Preferably, the fixing layer 120 is a PET film with a thickness ranging from 50um to 75um, and in the present embodiment, the fixing layer 120 has a thickness of 50 um. The panel layer 110 is a transparent PET film, a surface adhesive layer 102 for bonding the panel layer 110 and the fixing layer 120 is arranged between the panel layer 110 and the fixing layer 120, and the surface adhesive layer 102 can be made of a double-sided adhesive tape. The back of the panel layer 110 is printed with key patterns corresponding to the circuit matrix 101, and by pressing the corresponding key patterns on the panel layer 110, the pressing sheet 122 of the fixed layer 120 is contacted, and the corresponding metal elastic sheet 131 on the interlayer surface glue layer 130 is contacted, so that the touch feeling of the membrane switch 10 is improved, the accuracy of the pressing operation is convenient to prompt a user, and the user can know the correct pressed key patterns by sensing the touch feeling of the pressing sheet 122 and the metal elastic sheet 131 when pressing.

Specifically, in the present embodiment, the press contacts 1012 of the circuit matrix 101 are connected by silver paste line rows or columns to form a contact transmission line 1015, the connection point lines 1014 are connected by silver paste line rows or columns to form a connection transmission line 1016, and the lead terminals of the contact transmission line 1015 and the lead terminals of the connection transmission line 1016 are connected to one cable 150. The membrane switch 10 is electrically connected with a control circuit board of an electrical appliance through a cable 150 to realize signal transmission.

Preferably, a soldering terminal 1017 is electrically connected to the lead terminal of each contact transmission line 1015 and the lead terminal of the connection transmission line 1016, the cable 150 includes a cable sheath 152 and a plurality of wires 151 wrapped in the cable sheath 152, one end of the soldering terminal 1017 is connected to the corresponding lead terminal, and the other end is connected to one of the wires 151 of the cable 150. The membrane switch 10 is electrically connected to the control circuit board of the electrical appliance through the lead wire 151 of the cable 150 via the lead end of the contact transmission line 1015 and the lead end connected to the transmission line 1016, one end of the lead wire 151 of the cable 150 is connected to the corresponding lead end, and the other end is used for being soldered to the control circuit board of the electrical appliance. The number of the wires 151 in the electric cable 150 is the same as the number of the soldering terminals 1017 connected correspondingly thereto. The signal transmission is realized through the connection of the wires 151 of the cable 150 and the circuit matrix 101, so that the use of a connector can be reduced, and the production cost is saved. The connection between the circuit matrix 101 and the cable 150 is realized by providing the soldering terminal 1017 to solder the conductive wire 151 of the cable 150 to the lead terminal of the contact transmission line 1015 and the lead terminal of the connection transmission line 1016, and the other end of the conductive wire 151 is soldered to a control circuit board of an electrical appliance to transmit signals.

Preferably, in this embodiment, a lead tab 160 for leading out a contact transmission line 1015 and a connection transmission line 1016 is formed on one side of the circuit tab 140, the circuit matrix 101 is a 3 × 4 matrix, the press contacts 1012 of the circuit matrix 101 are connected by silver paste line columns to form the contact transmission line 1015, the connection point lines 1014 of the circuit matrix 101 are connected by silver paste line rows to form the connection transmission line 1016, and the lead terminals of all the contact transmission lines 1015 and the lead terminals of the connection transmission line 1016 are arranged in parallel on the lead tab 160. The pressing contact 1012 and the connection point 1013 are printed with conductive silver paste to be electrically connected to the silver paste circuit. Of course, in some embodiments, the pressing contacts 1012 of the circuit matrix 101 are connected by silver paste circuit rows and form the contact transmission lines 1015, and the connection point circuits 1014 of the circuit matrix 101 are connected by silver paste circuit columns and form the connection transmission lines 1016, and the rest of the structure and the function are the same as those of the present embodiment.

Specifically, in this embodiment, a back adhesive layer 170 is disposed on the lower surface of the circuit sheet 140, the panel layer 110 is located on the upper surface of the membrane switch 10, and the back adhesive layer 170 is located on the lower surface of the membrane switch 10, and is used for adhering the membrane switch 10 to a housing of an electrical appliance, so as to facilitate assembly of the membrane switch 10. The back adhesive layer 170 is a double-sided adhesive tape.

To sum up, the utility model discloses membrane switch punches a hole and forms the preforming that corresponds the press contact along punching a hole inwards extending through the regional formation of pressing the contact that corresponds circuit matrix at the fixed bed to strengthen membrane switch's sense of touch, improve user experience. Meanwhile, signal transmission is realized through connection of the wires of the cables and the circuit matrix, the use of the connector can be reduced, and the production cost is saved.

The foregoing is considered as illustrative of the preferred embodiments of the invention and is not intended to limit the invention in any way. Various equivalent changes and modifications can be made on the basis of the above embodiments by those skilled in the art, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a membrane switch, its characterized in that, membrane switch includes panel layer, fixed layer, the one side glue film in between, circuit piece and the gum layer that from top to bottom sets up according to the preface and bonds each other, be provided with the circuit matrix on the circuit piece, the circuit matrix includes a plurality of circuit units, and each circuit unit is including one press the contact and a plurality of encircle set up in the tie point around pressing the contact, wherein two adjacent tie points disconnection and all the other adjacent tie points of each circuit unit through silver thick liquid circuit interconnect formation tie point circuit, the fixed layer corresponds each the region of pressing the contact of circuit matrix is formed with punches a hole, the fixed layer is formed with the preforming that corresponds to pressing the contact along punching a hole marginal inward extension, the one side glue film in between corresponds to each the circuit unit is provided with a metal shrapnel.

2. The membrane switch according to claim 1, wherein the pressing piece includes a connection end and a terminal end, one end of the connection end is connected to the punched edge, and the other end thereof is connected to the terminal end, the terminal end corresponding to the center of the pressing contact.

3. The membrane switch of claim 2, wherein said terminal end is of a rounded configuration.

4. The membrane switch according to claim 1, characterized in that the press contacts of the line matrix are connected by means of silver paste line rows or columns and form contact transmission lines, the connection point lines are connected by means of silver paste line rows or columns and form connection transmission lines, and the lead terminals of the contact transmission lines and the lead terminals of the connection transmission lines are connected to a cable.

5. The membrane switch of claim 4, wherein the lead terminal of each of the contact transmission lines and the lead terminal of the connection transmission line are respectively press-fitted with a soldering terminal, the cable comprises a wire sheath and a plurality of wires wrapped in the wire sheath, one end of the soldering terminal is connected with the corresponding lead terminal, and the other end of the soldering terminal is connected with one of the wires of the cable.

6. The membrane switch of claim 1, wherein the adhesive backing layer is a double-sided adhesive.

7. The membrane switch of claim 1, wherein a surface adhesive layer for adhering the panel layer and the fixing layer is disposed between the panel layer and the fixing layer.

8. The membrane switch according to claim 1, characterized in that the number of connection points of each of said line units is four and equally spaced around the circumference of the corresponding press contact.

9. The membrane switch of claim 1, wherein the fixed layer is a PET film having a thickness ranging from 50um to 75 um.

10. The membrane switch of claim 1, wherein said panel layer is a transparent PET film and has a key pattern printed on the back surface.

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