CN219759422U - Touch key structure - Google Patents

Abstract

The present utility model relates to the field of touch keys, and in particular, to a touch key structure; the double-sided adhesive tape reduces at least one layer of double-sided adhesive tape, has a simple structure, further simplifies the process flow, and can effectively improve the production efficiency; comprising the following steps: transparent glass arranged from top to bottom; the diffusion film layer is coated with a black ink layer at the bottom, a hollowed-out opening is formed in the black ink layer, a semi-transparent black ink layer is coated at the hollowed-out opening, and the diffusion film layer is connected with the bottom of the transparent glass through the black ink layer and the semi-transparent black ink layer; the FPC flexible circuit board, the FPC flexible circuit board top bonds and has the double-sided adhesive, the FPC flexible circuit board is glued diffusion barrier layer through the double-sided adhesive and is adhered to transparent glass bottom. As a preferred implementation mode of the touch key structure provided by the utility model, the touch key structure further comprises two rapid adjusting and connecting components which are used for detachably adjusting and connecting the transparent glass and the FPC flexible circuit board.

Description

Touch key structure

Technical Field

The present utility model relates to the field of touch keys, and in particular, to a touch key structure.

Background

The touch key can penetrate through the insulating material shell (glass, plastic and the like) to accurately detect the effective touch of the finger, and is widely applied to remote controllers, light dimming of lamps, various switches, vehicle-mounted, small household appliances, household appliance control interfaces and the like; in the current market, more and more key touch panels are applied, some keys are required to be attached with diffusion films in light transmission, the diffusion films are generally attached between the back surface of the key FPC and transparent glass through upper and lower double-layer double-sided adhesion, and therefore a double-sided adhesion process is required.

According to the touch key structure (publication number CN 218215079U), an optical adhesive layer, a SENSOR layer, a double-sided adhesive layer, a diffusion film layer and a buffer foam layer are arranged from top to bottom, a yielding opening is arranged on the optical adhesive layer, a glue removing opening is arranged on the bonding surface of the optical adhesive layer corresponding to the SENSOR layer, and the glue removing opening is circumferentially arranged along the yielding opening.

However, when the present inventors embodied this device, the following drawbacks were found to exist: the upper surface and the lower surface of the diffusion film are adhered with other film layers through double-layer double-sided adhesion, the process flow is complex, the production efficiency is affected, and the structure is relatively complex.

Disclosure of Invention

Based on the above, it is necessary to provide a touch key structure for reducing at least one layer of double-sided adhesive, simplifying the structure, further simplifying the process flow, and effectively improving the production efficiency.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a touch key structure is applied to a touch key.

The touch key structure specifically comprises:

transparent glass arranged from top to bottom;

the diffusion film layer is coated with a black ink layer at the bottom, a hollowed-out opening is formed in the black ink layer, a semi-transparent black ink layer is coated at the hollowed-out opening, and the diffusion film layer is connected with the bottom of the transparent glass through the black ink layer and the semi-transparent black ink layer;

the FPC flexible circuit board, the double-sided adhesive is adhered to the top of the FPC flexible circuit board, and the FPC flexible circuit board is adhered to the bottom of the transparent glass through the double-sided adhesive.

As a preferred implementation mode of the touch key structure provided by the utility model, the touch key structure further comprises two rapid adjustment connecting components which are used for detachably adjusting and connecting the transparent glass and the FPC flexible circuit board, wherein the two rapid adjustment connecting components are symmetrically arranged on two sides of the transparent glass, the rapid adjustment connecting components comprise a base body, a ratchet wheel rotatably arranged on the base body, a ratchet wheel hinged on the base body, an elastic connecting piece and a connecting belt, one end of the elastic connecting piece is hinged with the base body, the other end of the elastic connecting piece is hinged with the ratchet wheel, a pressing wheel is fixedly arranged on the ratchet wheel, one end of the connecting belt is connected with the FPC flexible circuit board, and the other end of the connecting belt is covered on the transparent glass through the pressing wheel.

As a preferred implementation mode of the touch key structure provided by the utility model, the outline dimension of the double-sided adhesive is larger than that of the diffusion film layer, and the diffusion film layer is adhered below the black ink layer at the bottom of the transparent glass through double-sided adhesive.

As a preferred implementation mode of the touch key structure provided by the utility model, through holes which are arranged corresponding to the hollowed-out openings and key patterns on the FPC are formed on the double-sided adhesive tape.

As an preferable implementation mode of the touch key structure provided by the utility model, the double-sided adhesive tape is black.

As a preferred implementation mode of the touch key structure provided by the utility model, a hollow slot is arranged at a key position on the FPC.

As a preferred implementation mode of the touch key structure provided by the utility model, the transparent glass is colorless transparent toughened glass.

As a preferred implementation mode of the touch key structure provided by the utility model, the black ink layer is provided with hollowed-out patterns which are arranged corresponding to keys on the FPC.

As an preferable implementation mode of the touch key structure provided by the utility model, the ratchet wheel is fixedly provided with a screwing part.

As a preferred implementation mode of the touch key structure provided by the utility model, the connecting belt is detachably arranged on the FPC flexible circuit board through bolts.

Compared with the prior art, the utility model has the following beneficial effects:

according to the touch key structure provided by the utility model, the bottom of the double-sided adhesive is adhered to the top of the FPC flexible circuit board, and the diffusion film layer is laminated on the transparent glass through the double-sided adhesive, so that the diffusion film layer can play a role in correcting the diffusion angle of a light source, the light radiation area can be increased, but the light intensity of the unit area is reduced, namely the brightness is reduced. After the light-emitting source is diffused by the diffusion material, the light-emitting source can be changed into a larger area, the uniformity is better, the connecting structure is concise, the bonding process of at least one layer of double-sided adhesive is reduced, meanwhile, the optical adhesive layer and the buffer foam layer are reduced, the production process flow is further simplified, and the production efficiency can be effectively improved; simple and compact structure, and obviously improved connection firmness.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a touch key structure according to the present utility model;

fig. 2 is a schematic diagram of a rear view structure of a touch key structure according to the present utility model;

FIG. 3 is a schematic cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a schematic diagram of the connection structure of each layer;

FIG. 5 is an exploded view of the various layers;

FIG. 6 is an enlarged schematic view of a portion of FIG. 3A;

the labels in the figures are illustrated below: 1. transparent glass; 2. a diffusion film layer; 3. a black ink layer; 4. a hollowed-out opening; 5. a semi-permeable black ink layer; 6. FPC flexible circuit board; 7. double-sided adhesive; 8. a base; 9. a ratchet wheel; 10. a ratchet; 11. an elastic connection member; 12. a connecting belt; 13. a pinch roller; 14. a through hole; 15. a hollow slot; 16. hollowed-out patterns; 17. and a screwing part.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the touch key structure described in the background art, the upper and lower surfaces of the diffusion film layer are required to be adhered to other film layers through double-layer double-sided adhesion, so that the process flow is complex, the production efficiency is affected, and the structure is relatively complex.

In order to solve the technical problem, the utility model provides a touch key structure which is applied to a touch key.

Example 1

Specifically, referring to fig. 4-5, the touch key structure specifically includes:

a transparent glass 1 arranged from top to bottom;

the diffusion film layer 2 is coated with a black ink layer 3 at the bottom of the diffusion film layer 2, a hollowed-out opening 4 is formed in the black ink layer 3, a semi-transparent black ink layer 5 is coated at the hollowed-out opening 4, and the diffusion film layer 2 is connected with the bottom of the transparent glass 1 through the black ink layer 3 and the semi-transparent black ink layer 5;

the FPC flexible circuit board 6, the top of the FPC flexible circuit board 6 is adhered with the double-sided adhesive 7, and the FPC flexible circuit board 6 adheres the diffusion film layer 2 to the bottom of the transparent glass 1 through the double-sided adhesive 7.

The upper and lower surfaces of the double-sided adhesive 7 are adhesive surfaces, the bottom adhesive surface of the double-sided adhesive 7 is adhered to the top of the FPC flexible circuit board 6, the diffusion film layer 2 is adhered to the adhesive surface of the top of the double-sided adhesive 7, the peripheral part of the double-sided adhesive 7 is adhered to the transparent glass 1, a light source is emitted from a key position on the FPC flexible circuit board 6, the diffusion film layer 2 can play a role in correcting the diffusion angle of the light source, the light radiation area is increased, but the light intensity of the unit area is reduced, namely the brightness is reduced. After being diffused by the diffusion material, the luminous light source can be changed into a larger area and has better uniformity, the connecting structure is simple, the bonding process of at least one layer of double-sided adhesive 7 is reduced, meanwhile, the optical adhesive layer and the buffer foam layer are reduced, the production process flow is further simplified, and the production efficiency can be effectively improved; simple and compact structure, and obviously improved connection firmness.

Example 2

For further optimization of the touch key structure provided in embodiment 1, please refer to fig. 2 and 6 specifically, a touch key structure further includes two quick adjustment connection components for detachable adjustment connection of transparent glass 1 and FPC flexible circuit board 6, the two quick adjustment connection components are symmetrically arranged at two sides of transparent glass 1, the quick adjustment connection components include a base 8, a ratchet 9 rotatably mounted on the base 8, a ratchet 10 hinged on the base 8, an elastic connection member 11 and a connection belt 12, one end of the elastic connection member 11 is hinged with the base 8, the other end of the elastic connection member 11 is hinged with the ratchet 10, a pinch roller 13 is fixedly mounted on the ratchet 10, one end of the connection belt 12 is connected with FPC flexible circuit board 6, and the other end of the connection belt 12 is pressed on transparent glass 1 by the pinch roller 13.

Furthermore, the elastic connecting piece 11 is preferably a tension spring, and can also be a rubber belt or other connecting pieces with equivalent connecting effect, which is not described in detail; a light emitting source is arranged in the case image position on the FPC flexible circuit board 6.

In this embodiment, the double-sided adhesive 7 may be a flexible plastic pad, and the upper and lower sides of the double-sided adhesive 7 are adhered with glue, in the assembling process of the transparent glass 1 and the FPC flexible circuit board 6, the connecting belt 12 is sent to the bottom of the pinch roller 13, by rotating the pinch roller 13 on one group of adjusting connecting components, the connecting belt 12 drives the FPC flexible circuit board 6 to move to one side, so as to adjust the alignment of the case on the FPC flexible circuit board 6 with the hollowed-out opening 4 and the through hole 14, in this process, the other adjusting connecting component breaks away from the limitation of the FPC flexible circuit board 6, after the position adjustment of the FPC flexible circuit board 6 is completed, the other adjusting connecting component is adjusted, so that the corresponding connecting belt 12 is in a relaxation state, the installation position of the FPC flexible circuit board 6 can be adaptively adjusted, the installation convenience and the installation precision of the FPC flexible circuit board 6 are improved, and at the same time, the connection tightness between the FPC flexible circuit board 6 and the transparent glass 1 is further improved, so that the overall installation stability of the structure is improved; furthermore, the quick adjustment connecting assembly is detachably arranged between the transparent glass 1 and the FPC flexible circuit board 6, can be used as an auxiliary fitting for limiting and connecting strength, and can be used as an auxiliary tool for installation according to actual requirements, and after the auxiliary installation effect is achieved, the quick adjustment connecting assembly is detached or an installation groove is reserved at the position corresponding to the external installation shell so as to meet the installation requirements.

Example 3

Further optimization of the touch key structure provided in embodiment 1, in particular, as shown in fig. 5-6,

the external dimension of the double-sided adhesive 7 is larger than that of the diffusion film layer 2, and the diffusion film layer 2 is adhered below the black ink layer 3 at the bottom of the transparent glass 1 through the double-sided adhesive 7; the diffusion film layer 2 is coated and adhered to the transparent glass 1 by the double-sided adhesive 7, the part of the double-sided adhesive 7 exceeding the diffusion film layer 2 is adhered to black ink at the bottom of the transparent glass 1, the periphery of the diffusion film layer 2 is limited, and the tight connection between the transparent glass 1 and the diffusion film layer 2 is realized through the double-sided adhesive 7 so as to ensure the installation stability of the diffusion film layer 2; the double-sided adhesive 7 is provided with through holes 14 which are arranged corresponding to the key patterns on the hollowed-out opening 4 and the FPC flexible circuit board 6; the double-sided adhesive 7 is black; the through hole 14 can allow the light source on the FPC 6 to pass through, so that the user can more clearly observe the corresponding key image; a hollow slot 15 is arranged at a key position on the FPC flexible circuit board 6; through the hollow slot 15, an installation space can be provided for the key pattern, and wires are allowed to be arranged for wiring; the transparent glass 1 is colorless transparent toughened glass; the toughened glass has high strength and is not fragile, and glass scraps are not scattered everywhere even if broken, so that the use safety of the touch key structure is improved; the black ink layer 3 is provided with hollowed-out patterns 16 which are arranged corresponding to the keys on the FPC flexible circuit board 6; the hollowed-out pattern 16 allows the light source to pass through, so that the user can more clearly observe the pattern of the corresponding key, and the recognition degree is improved.

Example 4

Further optimizing a touch key structure provided in embodiment 2, as shown in fig. 6,

the ratchet 9 is fixedly provided with a screwing part 17; the screwing part 17 can provide a better acting point for operators, the ratchet 9 can be more easily rotated and adjusted by an external tool, and the connecting belt 12 is detachably arranged on the FPC flexible circuit board 6 by bolts; in another embodiment, the connection tape 12 may be adhered to the FPC flexible circuit board 6; in the assembling process, the connecting belt 12 is detachably connected with the FPC flexible circuit board 6 in a split mode, layered assembly can be carried out when the structure is assembled, assembly convenience is improved, and the reserved length of the connecting belt 12 is adjusted by controlling the bonding position of the connecting belt 12 on the FPC flexible circuit board 6, so that the connecting belt 12 is prevented from being reserved too long; it should be noted that, the double-sided adhesive 7 in this embodiment may be a non-adhesive flexible pad, so as to ensure a fixed assembly connection between the solid layers of the quick adjustment connection assembly; the double-sided adhesive 7 is preferably a double-sided adhesive end face to ensure intimate adhesion of the layers of the assembly when no quick-adjust attachment assembly is required.

According to the touch key structure provided by the utility model, the diffusion film layer 2 is adhered under the black ink layer 3 at the bottom of the transparent glass 1 through the double-sided adhesive 7, the FPC flexible circuit board 6 is adhered at the bottom of the double-sided adhesive 7, the connecting belt 12 passes through the bottom of the corresponding pressing wheel 13, the corresponding ratchet wheel 9 is rotated by an external tool, the pressing wheel 13 drives the connecting belt 12 to move, the installation position on the FPC flexible circuit board 6 is adjusted, the light source on the FPC flexible circuit board 6 precisely passes through the corresponding through hole 14, the hollowed-out opening 4 and the hollowed-out pattern 16, so that a user can observe a clear case pattern, the black ink layer 3 prevents the light source from penetrating, and the hollowed-out pattern 16 is set off, so that the pattern is more obvious; after the ratchet 9 rotates and adjusts, the ratchet 10 limits the ratchet 9, so that the connecting belt 12 is tightly pressed on the black ink layer 3 at the bottom of the transparent glass 1 plate by the pressing wheel 13, the transparent glass 1 and the FPC flexible circuit board 6 are connected into a whole under the action of the connecting belt 12, the connection stability of the FPC flexible circuit board 6 and the transparent glass 1 is further improved, and when the double-sided adhesive 7 is aged, the tight connection between the FPC flexible circuit board 6 and the transparent glass 1 can be ensured, so that the service life of the touch key structure is prolonged.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (10)

1. The utility model provides a touch key structure which is characterized in that it includes

A transparent glass (1) arranged from top to bottom;

the diffusion film layer (2), the black ink layer (3) is coated on the bottom of the diffusion film layer (2), a hollowed-out opening (4) is formed in the black ink layer (3), a semi-transparent black ink layer (5) is coated on the hollowed-out opening (4), and the diffusion film layer (2) is connected with the bottom of the transparent glass (1) through the black ink layer (3) and the semi-transparent black ink layer (5);

the Flexible Printed Circuit (FPC) (6), the double-sided adhesive (7) is adhered to the top of the flexible printed circuit (6), and the flexible printed circuit (6) is used for adhering the diffusion film layer (2) to the bottom of the transparent glass (1) through the double-sided adhesive (7).

2. The touch key structure according to claim 1, further comprising two quick adjustment connecting components for detachable adjustment connection of the transparent glass (1) and the FPC flexible circuit board (6), wherein the two quick adjustment connecting components are symmetrically arranged on two sides of the transparent glass (1), the quick adjustment connecting components comprise a base body (8), a ratchet wheel (9) rotatably arranged on the base body (8), a ratchet wheel (10) hinged on the base body (8), an elastic connecting piece (11) and a connecting belt (12), one end of the elastic connecting piece (11) is hinged with the base body (8), the other end of the elastic connecting piece (11) is hinged with the ratchet wheel (10), a pinch roller (13) is fixedly arranged on the ratchet wheel (10), one end of the connecting belt (12) is connected with the FPC flexible circuit board (6), and the other end of the connecting belt (12) is pressed on the transparent glass (1) through the pinch roller (13).

3. The touch key structure according to claim 1, wherein the external dimension of the double-sided adhesive (7) is larger than the external dimension of the diffusion film layer (2), and the diffusion film layer (2) is adhered below the black ink layer (3) at the bottom of the transparent glass (1) through the double-sided adhesive (7).

4. The touch key structure according to claim 3, wherein the double-sided adhesive tape (7) is provided with through holes (14) corresponding to the hollowed-out openings (4) and key patterns on the flexible printed circuit (6).

5. The touch key structure according to claim 4, wherein the double-sided adhesive (7) is black.

6. The touch key structure according to claim 5, wherein a hollow slot (15) is provided at a key position on the FPC flexible circuit board (6).

7. The touch key structure according to claim 6, wherein the transparent glass (1) is colorless transparent tempered glass.

8. The touch key structure according to claim 7, wherein the black ink layer (3) is provided with hollowed patterns (16) corresponding to keys on the FPC flexible circuit board (6).

9. The touch key structure according to claim 2, wherein the ratchet wheel (9) is fixedly provided with a screwing part (17).

10. The touch key structure according to claim 9, wherein the connecting band (12) is detachably mounted on the FPC flexible circuit board (6) by bolts.