CN114694996B - keyboard device - Google Patents
keyboard device Download PDFInfo
- Publication number
- CN114694996B CN114694996B CN202011597089.6A CN202011597089A CN114694996B CN 114694996 B CN114694996 B CN 114694996B CN 202011597089 A CN202011597089 A CN 202011597089A CN 114694996 B CN114694996 B CN 114694996B
- Authority
- CN
- China
- Prior art keywords
- circuit board
- connection
- film
- disposed
- pressing
- 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.)
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Links
- 239000010410 layer Substances 0.000 claims abstract description 123
- 239000010408 film Substances 0.000 claims abstract description 110
- 239000010409 thin film Substances 0.000 claims abstract description 37
- 239000011241 protective layer Substances 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims description 55
- 239000002184 metal Substances 0.000 claims description 47
- 229910052751 metal Inorganic materials 0.000 claims description 47
- 238000005452 bending Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 230000008054 signal transmission Effects 0.000 abstract description 7
- 239000003575 carbonaceous material Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- -1 but not limited to Chemical class 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
Classifications
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- 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
- H01H13/704—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 characterised by the layers, e.g. by their material or structure
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/0202—Constructional details or processes of manufacture of the input device
-
- 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
- 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
- H01H13/81—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 characterised by electrical connections to external devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/002—Calculator, computer
Abstract
The invention provides a keyboard device which comprises keys, a film component, a flexible circuit board and a pressing component. The thin film component comprises a first thin film, a second thin film and a first conductive layer arranged on the first thin film. The flexible circuit board comprises a connecting end part, a first circuit, a first protective layer and a second protective layer, wherein the first circuit is arranged on the connecting end part and is provided with a first connecting terminal, and the first protective layer and the second protective layer are vertically covered on the connecting end part and expose the first connecting terminal. The pressing component comprises a first pressing element and a second pressing element. The first film and the second film are vertically coated on the flexible circuit board, the first pressing element and the second pressing element vertically clamp the film component and the flexible circuit board, and the first connecting terminal and the first conductive layer are ensured to be in overlapped contact so as to maintain electrical connection. The keyboard device can effectively improve the signal transmission between the keyboard device and the system circuit board.
Description
Technical Field
The present invention relates to a keyboard device, and more particularly, to a keyboard device capable of effectively improving signal transmission between a keyboard and a system circuit board.
Background
The keyboard of the prior art is generally provided with a film assembly for connecting with a system circuit board of an electronic product to transmit input signals. In practical use, the connection portion (generally referred to as a golden finger) of the flexible circuit board is inserted into the thin film assembly to form an electrical connection, so as to connect the system circuit board and the keyboard. However, when the connection portion of the flexible circuit board is inserted into the thin film assembly, the connection portion often cannot be in contact with the thin film assembly, so that it is difficult to maintain stable electrical connection, and poor lap joint is caused, which affects signal transmission between the keyboard and the system circuit board. For example, when the connection portion of the flexible circuit board is inserted into the thin film component, the upper and lower protection layers of the flexible circuit board cause a height difference and a gap between the connection terminal of the flexible circuit board and the circuit layer of the thin film component, resulting in a poor lap joint.
Disclosure of Invention
The invention provides a keyboard device which can effectively improve signal transmission between a keyboard and a system circuit board.
According to an aspect of the present invention, there is provided a keyboard apparatus comprising:
a plurality of keys;
the film component is positioned below the plurality of keys and comprises a first film, a second film and a first conductive layer, wherein the first film and the second film are opposite to each other;
the flexible circuit board comprises a connecting end part, a first circuit, a first protective layer and a second protective layer, wherein the first circuit is arranged on the connecting end part and is provided with a first connecting terminal positioned at the tail end of the connecting end part, and the first protective layer and the second protective layer respectively cover the connecting end part up and down and expose the first connecting terminal; and
the pressing component comprises a first pressing element and a second pressing element;
the first film and the second film of the film assembly vertically cover the flexible circuit board, and the first pressing element and the second pressing element vertically clamp the film assembly and the flexible circuit board, so that the first connection terminal of the first circuit and the first conductive layer of the film assembly are ensured to be in overlapped contact to maintain electrical connection.
As an alternative technical solution, the first pressing element has a first substrate and a first pressing block, the first pressing block is convexly disposed on a surface of the first substrate facing the thin film component, the first pressing block and the second pressing element vertically clamp the thin film component and the flexible circuit board, and the first pressing block ensures that the first connection terminal of the first circuit and the first conductive layer of the thin film component are in overlapping contact so as to maintain electrical connection.
As an alternative solution, the first substrate is a metal substrate and the first pressing block is an elastic block, or the first substrate is a metal substrate and the first pressing block is a metal block.
As an alternative technical scheme, the second pressing element is provided with a second base material and a second pressing block, the second pressing block is convexly arranged on the surface of the second base material facing the thin film component, and the first pressing block and the second pressing block vertically clamp the thin film component and the flexible circuit board, so that the first connection terminal of the first circuit and the first conductive layer of the thin film component are ensured to be in overlapped contact so as to maintain electrical connection.
Alternatively, the second substrate is a metal substrate and the second pressing block is an elastic block, or the second substrate is a metal substrate and the second pressing block is a metal block.
As an alternative technical solution, the thin film assembly further includes a second conductive layer disposed on the second thin film, the flexible circuit board further includes a second circuit disposed on the connection end portion and having a second connection terminal, the first connection terminal and the second connection terminal are disposed on the end portion of the connection end portion respectively, the first protection layer and the second protection layer expose the second connection terminal, and the first pressing element and the second pressing element ensure that the second connection terminal of the second circuit and the second conductive layer of the thin film assembly are in overlapping contact so as to maintain electrical connection.
As an alternative technical scheme, the first film is provided with a first opening section and a first connecting section which are connected, the second film is provided with a second opening section and a second connecting section which are connected, the second connecting section is opposite to the first connecting section, an opening is formed between the second opening section and the first opening section, a containing groove is formed between the second connecting section and the first connecting section, the containing groove is communicated with the opening, the first conductive layer is provided with a first connecting area and a first extending area, the first connecting area is arranged on the first connecting section, the first extending area is arranged on the first opening section, the second conductive layer is provided with a second connecting area and a second extending area, the second wiring area is arranged on the second wiring section, the second extension area is arranged on the second opening section, the flexible circuit board is inserted into the accommodating groove through the opening, the connecting end part is positioned between the first extension area and the first wiring area as well as between the second extension area and the second wiring area, the first pressing element presses against the first opening section and the first wiring section, the second pressing element presses against the second opening section and the second wiring section, and therefore the first wiring area and the first connecting terminal are ensured to be in overlapped contact so as to maintain electrical connection, and the second wiring area and the second connecting terminal are ensured to be in overlapped contact so as to maintain electrical connection.
As an alternative technical scheme, the first conductive layer includes a first metal layer and a first carbon material layer, the first metal layer is disposed on the first film, the first carbon material layer is disposed on the first metal layer, the first carbon material layer is in overlapping contact with the first connection terminal, the second conductive layer includes a second metal layer and a second carbon material layer, the second metal layer is disposed on the second film, the second carbon material layer is disposed on the second metal layer, and the second carbon material layer is in overlapping contact with the second connection terminal.
As an optional technical scheme, the width of the first carbon material layer is greater than the width of the first metal layer, and the width of the second carbon material layer is greater than the width of the second metal layer.
As an optional technical scheme, the device further comprises a fixing element, and the first pressing element and the second pressing element are relatively fixed through the fixing element.
As an optional technical scheme, the thin film assembly further comprises an additional circuit board and a fixing element, wherein the thin film assembly is arranged on the additional circuit board, and the first pressing element and the additional circuit board are relatively fixed through the fixing element.
As an optional technical scheme, the film assembly further includes a third film, the third film is disposed between the first film and the second film, and a gap is formed between the third film and the connection end of the flexible circuit board.
As an alternative technical scheme, the connecting end of the flexible circuit board is provided with a fixing hole for fixing the pressing component.
As an alternative technical scheme, the flexible circuit board further comprises an additional circuit board, the film component is configured on the additional circuit board, and the flexible circuit board further comprises a back folded section, wherein the back folded section is positioned at the bottom side of the additional circuit board.
As an alternative solution, the second pressing element presses the backward folded section against the bottom side of the additional circuit board.
As an optional technical solution, the flexible circuit board further includes a bending section, the bending section is connected with the connecting end portion, the bending section extends to a side surface of the thin film component, the first pressing element further includes a side substrate, and the side substrate covers a side of the bending section far away from the thin film component.
In summary, in the keyboard device of the present invention, the first pressing element and the second pressing element vertically clamp the thin film assembly and the flexible circuit board, so as to eliminate the height difference between the first connection terminal and the first conductive layer, avoid generating a gap between the first connection terminal and the first conductive layer, ensure the overlapping contact between the first connection terminal and the first conductive layer of the first circuit, maintain the electrical connection between the first connection terminal and the first conductive layer, solve the problem of poor electrical connection, and effectively improve the signal transmission between the keyboard and the system circuit board.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
FIG. 1A is a schematic partial perspective view of a keyboard apparatus according to an embodiment of the invention;
FIG. 1B is an exploded view of a keyboard apparatus according to an embodiment of the present invention;
FIG. 1C is a schematic partial cross-sectional view of a keyboard apparatus according to an embodiment of the invention;
FIG. 2 is a schematic partial cross-sectional view of a keyboard apparatus according to an embodiment of the invention;
FIG. 3 is a schematic top view of a first conductive layer of a keyboard device according to an embodiment of the invention;
FIG. 4 is a schematic top view of a second conductive layer of a keyboard device according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a keyboard apparatus according to an embodiment of the invention; and
fig. 6 is a schematic partial cross-sectional view of a keyboard apparatus according to an embodiment of the invention.
Detailed Description
Fig. 1 is a schematic partial perspective view of a keyboard device according to an embodiment of the invention. Fig. 1B is an exploded view of a keyboard apparatus according to an embodiment of the present invention. Fig. 1C is a schematic partial cross-sectional view of a keyboard apparatus according to an embodiment of the invention. Fig. 2 is a schematic partial cross-sectional view of a keyboard apparatus according to an embodiment of the invention. Fig. 3 is a schematic top view of a first conductive layer of a keyboard device according to an embodiment of the invention. Fig. 4 is a schematic top view of a second conductive layer of a keyboard device according to an embodiment of the invention. As shown in fig. 1A to 4, the keyboard apparatus 10 according to the embodiment of the invention includes a key 100, a film assembly 200, a flexible circuit board 300, and a pressing assembly 400. The film assembly 200 is located below the key 100 and includes a first film 210, a second film 220, and a first conductive layer 230. The first film 210 is disposed opposite to the second film 220, and the first conductive layer 230 is disposed on the first film 210 (e.g., the first conductive layer 230 is disposed on a surface of the first film 210 facing the second film 220). The flexible circuit board 300 includes a connection end 310, a first circuit 320, a first protection layer 330, and a second protection layer 340, wherein the first circuit 320 is disposed on the connection end 310 and has a first connection terminal 321 located at a terminal 311 of the connection end 310 (for example, the first connection terminal 321 is disposed on a surface of the terminal 311 facing the first film 210), the first protection layer 330 and the second protection layer 340 respectively cover the connection end 310 up and down (or called the first protection layer 330 covers over the connection end 310, and the second protection layer 340 covers under the connection end 310) and exposes the first connection terminal 321. The pressing assembly 400 includes a first pressing element 410 and a second pressing element 420. The first film 210 and the second film 220 of the film assembly 200 vertically cover the flexible circuit board 300 (or the first film 210 covers the flexible circuit board 300 above the flexible circuit board 300 and the second film covers the flexible circuit board 300 below the flexible circuit board), and the first pressing element 410 and the second pressing element 420 vertically clamp the film assembly 200 and the flexible circuit board 300, so as to ensure that the first connection terminal 321 of the first circuit 320 is in overlapping contact with the first conductive layer 230 of the film assembly 200 to maintain electrical connection.
The keys 100 may include letter keys, number keys, space keys, input keys, etc., and the present invention is not limited to the types and numbers of the keys 100. Furthermore, in some embodiments, the keyboard apparatus 10 is a computer keyboard, but in other embodiments, the keyboard apparatus 10 may be a key assembly of other electronic apparatuses.
In the keyboard device 10 of the embodiment of the invention, the first pressing element 410 and the second pressing element 420 vertically clamp the thin film assembly 200 and the flexible circuit board 300, so that the height difference between the first connecting terminal 321 and the first conductive layer 230 can be eliminated, the gap between the first connecting terminal 321 and the first conductive layer 230 is avoided, the first connecting terminal 321 of the first circuit 320 is ensured to be in overlapped contact with the first conductive layer 230, the electrical connection between the first connecting terminal 321 and the first conductive layer 230 is maintained, the problem of poor electrical connection is solved, and the signal transmission between the keyboard and the system circuit board is effectively improved.
The first pressing element 410 may further include a first substrate 411 and a first pressing block 412, the first pressing block 412 is convexly disposed on a surface of the first substrate 411 facing the film assembly 200, the first pressing block 412 and the second pressing element 420 vertically clamp the film assembly 200 and the flexible circuit board 300 (or the first pressing block 412 clamps the film assembly 200 and the flexible circuit board 300 above the film assembly 200 and the flexible circuit board 300 below the second pressing element 420 together), and the first pressing block 412 ensures that the first connection terminal 321 of the first circuit 320 is overlapped with the first conductive layer 230 of the film assembly 200 so as to maintain the electrical connection between the first connection terminal 321 and the first conductive layer 230. In the present invention, the materials of the first substrate 411 and the first pressing block 412 may be the same or different metals, or the first substrate 411 is a metal substrate and the first pressing block 412 is an elastic block. In an embodiment, as shown in fig. 2, the materials of the first substrate 411 and the first pressing block 412 are the same metal, and the first substrate 411 and the first pressing block 412 may be integrally formed. In one embodiment, as shown in fig. 5, the first substrate 411A is a metal substrate, and the first pressing block 412A is an elastic block, such as, but not limited to, a sponge block. In one embodiment, as shown in fig. 1C, the first substrate 411 is a metal substrate and the first pressing block 412 is an elastic block. In addition, in fig. 1C, the surface of the first substrate 411 facing the film assembly 200 is concavely formed with a groove, the first pressing block 412 is disposed in the groove 414 and partially protrudes out of the groove 414, and the first pressing element 410 is pressed against the film assembly 200, so that the first pressing block 412 is elastically deformed and can be completely accommodated in the groove 414, thereby applying a pressure to the film assembly 200, and ensuring that the first connection terminal 321 of the first circuit 320 is in overlapping contact with the first conductive layer 230 of the film assembly 200. In fig. 5, the surface of the first substrate 411A facing the film assembly 200 is a plane, and the surface of the first substrate 411A facing the film assembly 200 abuts against the film assembly 200, so that the first abutting block 412A abuts against the film assembly 200 and elastically deforms, thereby exerting pressure on the film assembly 200, and ensuring that the first connection terminal 321 of the first circuit 320 is in overlapping contact with the first conductive layer 230 of the film assembly 200. In addition, in one embodiment, metals such as, but not limited to, iron and iron alloy may be used as the first substrate 411 and the first pressing block 412.
The film assembly 200 may further include a second conductive layer 240 disposed on the second film 220 (e.g., the second conductive layer 240 is disposed on a surface of the second film 220 facing the first film 210), the flexible circuit board 300 may further include a second circuit 350, the second circuit 350 is disposed on the connection end 310 (e.g., the second circuit 350 is disposed on a surface of the connection end 310 facing the second film 220) and has a second connection terminal 351, the first connection terminal 321 and the second connection terminal 351 are disposed on the end 311 of the connection end 310 respectively (specifically, the first connection terminal 321 is disposed on the end 311 of the connection end 310, the second connection terminal 351 is disposed below the connection end 310), the first protection layer 330 and the second protection layer 340 further expose the second connection terminal 351, and the first pressing element 410 and the second pressing element 420 further ensure that the second connection terminal 351 of the second circuit 350 is in overlapping contact with the second conductive layer 240 of the film assembly 200, such that an electrical connection is maintained between the second connection terminal 351 and the second conductive layer 240. Further, the connection end portion 310 has a first surface 312 and a second surface 313 opposite to each other, the first surface 312 faces the first conductive layer 230, the second surface 313 faces the second conductive layer 240, the first circuit 320 is disposed on the first surface 312, and the second circuit 350 is disposed on the second surface 313; in fig. 2, the first surface 312 is, for example, an upper surface, and the second surface 313 is, for example, a lower surface; the first protection layer 330 exposes the first connection terminal 321, and the second protection layer 340 exposes the second connection terminal 351.
The first film 210 further has a first opening section 211 and a first connecting line section 212, the first connecting line section 212 is laterally connected to the first opening section 211, the second film 220 further has a second opening section 221 and a second connecting line section 222, the second opening section 221 is laterally connected to the second connecting line section 222, the second connecting line section 222 is opposite to the first connecting line section 212, the second opening section 221 is opposite to the first opening section 211, an opening is formed between the second opening section 221 and the first opening section 211, a receiving groove 250 communicating with the opening is formed between the second connecting line section 222 and the first connecting line section 212, the first conductive layer 230 has a first connecting line section 231 and a first extension section 232, the first connecting line section 231 is disposed on the first connecting line section 212 (for example, the first connecting line section 231 is disposed on the surface of the first connecting line section 212 facing the second film 220), the first extension region 232 is disposed on the first opening section 211 (for example, the first extension region 232 is disposed on a surface of the first opening section 211 facing the second film 220), the second conductive layer 240 has a second connection region 241 and a second extension region 242, the second connection region 241 is disposed on the second connection line segment 222, the second extension region 242 is disposed on the second opening section 221, the flexible circuit board 300 is inserted into the accommodating groove 250 through the opening, the connection end 310 is disposed between the first conductive layer 230 (or the first extension region 232 and the first connection region 231) and the second conductive layer 240 (or the second extension region 242 and the second connection region 241), the first substrate 411 is pressed against the first opening section 211, the first pressing block 412 is pressed against the first connection line segment 212, the second pressing element 420 is pressed against the second opening section 221 and the second connection line segment 222, so as to ensure that the first connection region 231 is overlapped with the first connection terminal 321, the second connection region 241 is in overlapping contact with the second connection terminal 351 to maintain the electrical connection between the first connection region 231 and the first connection terminal 321 and to maintain the electrical connection between the second connection region 241 and the second connection terminal 351.
The first conductive layer 230 further includes a first metal layer 2301 and a first carbon material layer 2302, the first metal layer 2301 is disposed on the first thin film 210, the first carbon material layer 2302 is disposed on the first metal layer 2301, the second conductive layer 240 includes a second metal layer 2401 and a second carbon material layer 2402, the second metal layer 2401 is disposed on the second thin film 220, the second carbon material layer 2402 is disposed on the second metal layer 2401, the first carbon material layer 2302 is in overlapping contact with the first connection terminal 321, and the second carbon material layer 2402 is in overlapping contact with the second connection terminal 351. Further, in some embodiments, the width of the first carbon layer 2302 is greater than the width of the first metal layer 2301, and the width of the second carbon layer 2402 is greater than the width of the second metal layer 2401.
The keyboard apparatus 10 may further include a fixing element 500, wherein the first base 411 and the second pressing element 420 of the first pressing element 410 are relatively fixed by the fixing element 500 to clamp the film assembly 200 and the flexible circuit board 300, and the fixing element 500 is, for example, but not limited to, a screw, a rivet, etc. In addition, the keyboard apparatus 10 may further include an additional circuit board 600, the film assembly 200 is disposed on the additional circuit board 600, and the first substrate 411 of the first pressing element 410, the second pressing element 420 and the additional circuit board 600 are relatively fixed by the fixing element 500; furthermore, the connecting end 310 of the flexible circuit board 300 further has a fixing hole 314 for fixing the pressing component 400 and the additional circuit board 600, the fixing element 500 is disposed in the fixing hole 314, and the first pressing component 410 and the second pressing component 420 vertically clamp the film component 200, the flexible circuit board 300 and the additional circuit board 600. In some embodiments, the first pressing element 410 is integrally formed with the additional circuit board 600; however, in other embodiments, the additional circuit board 600 may be integrally formed with the second pressing element 420.
In an embodiment, as shown in fig. 1C, the flexible circuit board 300 may further include a back folded section 360, the back folded section 360 is located at the bottom side of the additional circuit board 600, and the second pressing element 420 presses the back folded section 360 against the bottom side of the additional circuit board 600. In addition, the flexible circuit board 300 may further include a bending section 370, wherein the bending section 370 is connected between the connecting end portion 310 and the back-folded section 360, and the bending section 370 extends to a side surface of the film assembly 200, the first pressing element 410 further includes a side substrate 413, and the side substrate 413 covers a side of the bending section 370 away from the film assembly 200. Further, in fig. 1C, the connection end portion 310 is disposed opposite to the folded back portion 360, that is, the connection end portion 310 is located at the top side of the additional circuit board 600, and the curved portion 370 extends to the side of the second film 220 of the film assembly 200 and the side of the additional circuit board 600.
The film assembly 200 may further include a third film 260, where the third film 260 is disposed between the first film 210 and the second film 220, and the third film 260 is separated from the end 311 of the connection end 310 by the receiving groove 250, i.e. a gap is formed between the third film 260 and the end 311 of the connection end 310. The first, second and third films 210, 220 and 260 may be polyimide (polyimide) films, polyethylene terephthalate (polyethylene terephthalate) films or polycarbonate (polycarbonate) films.
Fig. 6 is a schematic cross-sectional view of a keyboard device according to an embodiment of the invention. As shown in fig. 6, in the keyboard apparatus 10 of an embodiment of the invention, the second pressing element 420 further includes a second substrate 421B and a second pressing block 422B, the second pressing block 422B is convexly disposed on a surface of the second substrate 421B facing the film assembly 200, the first pressing block 412 and the second pressing block 422B vertically clamp the film assembly 200 and the flexible circuit board 300 (or the first pressing block 412 clamps the film assembly 200 and the flexible circuit board 300 above and the second pressing block 422B clamps the film assembly 200 and the flexible circuit board 300 below the film assembly 200 and the flexible circuit board 300 together), and the first pressing block 412 and the second pressing block 422B ensure an overlapping contact between the first connection terminal 321 and the first conductive layer 230 and an overlapping contact between the second connection terminal 351 and the second conductive layer 240 to maintain the electrical connection. In the present invention, the materials of the second substrate 421B and the second pressing block 422B may be the same or different types of metals, or the second substrate 421B is a metal substrate and the second pressing block 422B is an elastic block. In an embodiment, as shown in fig. 6, the second substrate 421B and the second pressing block 422B are made of the same metal, and the second substrate 421B and the second pressing block 422B may be integrally formed. In one embodiment, the second substrate 421B is a metal substrate and the second pressing block 422B is an elastic block, such as, but not limited to, a sponge block. In addition, in one embodiment, metals such as, but not limited to, iron and iron alloys may be used as the second substrate 421B and the second pressing block 422B. In addition, the first substrate 411 of the first pressing element 410 and the second substrate 421B of the second pressing element 420 can be relatively fixed by the fixing element, so as to clamp the thin film assembly 200 and the flexible circuit board 300.
In summary, in the keyboard device according to the embodiment of the invention, the first pressing element and the second pressing element vertically clamp the thin film component and the flexible circuit board, so that the height difference between the first connecting terminal and the first conductive layer can be eliminated, the gap between the first connecting terminal and the first conductive layer is avoided, the first connecting terminal of the first circuit is ensured to be in overlapping contact with the first conductive layer, the first connecting terminal is electrically connected with the first conductive layer, the problem of poor electrical connection is solved, and the signal transmission between the keyboard and the system circuit board is effectively improved.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (15)
1. A keyboard apparatus, comprising:
a plurality of keys;
the film component is positioned below the plurality of keys and comprises a first film, a second film and a first conductive layer, wherein the first film and the second film are opposite to each other;
the flexible circuit board comprises a connecting end part, a first circuit, a first protective layer and a second protective layer, wherein the first circuit is arranged on the connecting end part and is provided with a first connecting terminal positioned at the tail end of the connecting end part, and the first protective layer and the second protective layer respectively cover the connecting end part up and down and expose the first connecting terminal; and
the pressing component comprises a first pressing element and a second pressing element; the first pressing element is provided with a first base material and a first pressing block, the first pressing block is convexly arranged on the surface of the first base material facing the film component, and the setting position of the first pressing block corresponds to the first connecting terminal;
the first film and the second film of the film assembly vertically cover the flexible circuit board, and the first pressing block and the second pressing element vertically clamp the film assembly and the flexible circuit board, and the first pressing block ensures that the first connecting terminal of the first circuit and the first conductive layer of the film assembly are in overlapping contact so as to maintain electrical connection.
2. The keyboard device of claim 1, wherein the first substrate is a metal substrate and the first pressing block is an elastic block, or wherein the first substrate is a metal substrate and the first pressing block is a metal block.
3. The keyboard device of claim 1, wherein the second pressing element has a second substrate and a second pressing block, the second pressing block is convexly disposed on a surface of the second substrate facing the thin film component, and the first pressing block and the second pressing block vertically clamp the thin film component and the flexible circuit board, so as to ensure that the first connection terminal of the first circuit is in overlapping contact with the first conductive layer of the thin film component to maintain electrical connection.
4. The keyboard device of claim 3, wherein the second substrate is a metal substrate and the second pressing block is an elastic block, or wherein the second substrate is a metal substrate and the second pressing block is a metal block.
5. The keyboard device of claim 1, wherein the thin film assembly further comprises a second conductive layer disposed on the second thin film, the flexible circuit board further comprises a second circuit disposed on the connection end portion and having a second connection terminal, the first connection terminal and the second connection terminal are disposed at the end of the connection end portion respectively, the first protection layer and the second protection layer expose the second connection terminal, and the first pressing element and the second pressing element ensure that the second connection terminal of the second circuit and the second conductive layer of the thin film assembly are in overlapping contact for maintaining electrical connection.
6. The keyboard device of claim 5, wherein the first film has a first opening section and a first connection section connected to each other, the second film has a second opening section and a second connection section connected to each other, the second connection section is opposite to the first connection section, an opening is formed between the second opening section and the first opening section, a container is formed between the second connection section and the first connection section, the container is in communication with the opening, the first conductive layer has a first connection region and a first extension region, the first connection region is disposed on the first connection section, the first extension region is disposed on the first opening section, the second conductive layer has a second connection region and a second extension region, the second extension region is disposed on the second connection section, the flexible circuit board is inserted into the container through the opening, the connection end is disposed between the first extension region and the first connection region and the second extension region and the second connection section, the first connection region and the second connection region are in contact with the first connection terminal and the second connection section, the first connection region and the second connection region are maintained in contact with the first connection region and the second connection region are maintained in contact.
7. The keyboard device of claim 6, wherein the first conductive layer comprises a first metal layer and a first carbon layer, the first metal layer is disposed on the first film, the first carbon layer is disposed on the first metal layer, the first carbon layer is in overlapping contact with the first connection terminal, the second conductive layer comprises a second metal layer and a second carbon layer, the second metal layer is disposed on the second film, the second carbon layer is disposed on the second metal layer, and the second carbon layer is in overlapping contact with the second connection terminal.
8. The keyboard device of claim 7, wherein the first carbon layer has a width greater than a width of the first metal layer and the second carbon layer has a width greater than a width of the second metal layer.
9. The keyboard device of claim 1, further comprising a fixing element, wherein the first pressing element and the second pressing element are relatively fixed by the fixing element.
10. The keyboard device of claim 1, further comprising an additional circuit board and a fixing element, wherein the film assembly is disposed on the additional circuit board, and the first pressing element and the additional circuit board are relatively fixed by the fixing element.
11. The keyboard device of claim 1, wherein the film assembly further comprises a third film disposed between the first film and the second film, and a gap is provided between the third film and the connection end of the flexible circuit board.
12. The keyboard device according to claim 1, wherein the connecting end portion of the flexible circuit board has a fixing hole for fixing the pressing component.
13. The keyboard device of claim 1, further comprising an additional circuit board, wherein the thin film component is disposed on the additional circuit board, and wherein the flexible circuit board further comprises a back folded section, wherein the back folded section is located at a bottom side of the additional circuit board.
14. The keyboard device of claim 13, wherein the second pressing element presses the backward folded section against the bottom side of the additional circuit board.
15. The keyboard device of claim 1, wherein the flexible circuit board further comprises a bending section connected to the connecting end portion, the bending section extending to a side of the thin film assembly, the first pressing element further comprises a side substrate, and the side substrate covers a side of the bending section away from the thin film assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597089.6A CN114694996B (en) | 2020-12-29 | 2020-12-29 | keyboard device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597089.6A CN114694996B (en) | 2020-12-29 | 2020-12-29 | keyboard device |
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| CN114694996A CN114694996A (en) | 2022-07-01 |
| CN114694996B true CN114694996B (en) | 2023-11-14 |
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| CN202011597089.6A Active CN114694996B (en) | 2020-12-29 | 2020-12-29 | keyboard device |
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| CN (1) | CN114694996B (en) |
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| TWM391181U (en) * | 2010-06-08 | 2010-10-21 | Chicony Electronics Co Ltd | Key button structure having anti-dust function |
| CN201927521U (en) * | 2010-11-17 | 2011-08-10 | 深圳市多精彩电子科技有限公司 | Circuit board structure of keyboard film |
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| Publication number | Publication date |
|---|---|
| CN114694996A (en) | 2022-07-01 |
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