Annular luminous film key structure
By using an annular light-guiding layer and special conductive parts in the annular light-emitting film switch, the problems of structural thickness and uniformity in the prior art are solved, and the uniformity of annular light emission and the compression of the structural layer number are achieved.
Patent Information
- Application Number
- CN202421777416.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Due to the limited number of layers, the existing annular luminescent film switch structure cannot further reduce the product thickness, and the uniformity of annular luminescent is also poor.
An annular light-guiding layer is used to isolate the upper conductive layer and the lower conductive layer, and use special structure conductive parts to achieve circuit conduction when downward, and at the same time have elastic recovery function, so as to achieve the goal of the number of layers of the annular light-emitting and compressed structure.
Through the design of annular light-guiding layer and special conductive parts, the uniformity of annular light emission and the compression of the number of layers of the film button structure are achieved, which improves the thickness and service life of the product.
Smart Images
Figure CN222826256U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of membrane switches, and in particular to a ring-shaped luminous membrane key structure. Background Art
[0002] A membrane switch is an electronic switch, usually made of a film material, which is soft, thin and light. It is mainly composed of a film substrate and a membrane switch layer covering it. The working principle of the membrane switch is to open and close the circuit by changing the conductivity of the membrane switch layer when pressed or pressure is applied.
[0003] Among many application demand fields, annular lighting is one of the common realization requirements of membrane switches, which requires that a circle-shaped lighting range can be realized around the membrane switch after conduction; such membrane switch structure is generally composed of at least six layers of materials, including an upper surface layer, an LED layer, an upper conductive layer, an insulating isolation layer, a lower conductive layer and a lower surface layer, wherein a metal spring is used to contact the upper conductive layer. When pressed down, the metal spring can connect the upper conductive layer and the lower conductive layer to realize circuit conduction and finally make the LED bulb in the LED layer emit light; during use, due to the limitation of the number of layers, the product thickness cannot be further reduced. In addition, the uniformity of the annular lighting is also poor, and there is room for improvement. Utility Model Content
[0004] The purpose of the present application is to provide a ring-shaped luminous membrane key structure to solve at least one of the above-mentioned technical problems.
[0005] In order to solve the above technical problems, the present application provides a ring-shaped luminous film key structure, including a panel layer, an upper conductive layer, a light guide layer, a lower conductive layer, a substrate, a conductive member and a luminous member;
[0006] The light emitting element is electrically connected to the upper conductive layer, the upper conductive layer is arranged below the panel layer, the light guide layer is arranged between the upper conductive layer and the lower conductive layer; the lower conductive layer is arranged on the substrate;
[0007] The conductive member is arranged in the space formed by the upper conductive layer, the lower conductive layer and the light guide layer in an annular shape; the conductive member comprises an outer protective layer, the outer protective layer is a columnar axial portion and a plurality of elastic strips arranged around the axial portion, a conductive metal rod is arranged in the axial portion, the upper end of the conductive metal rod abuts against the upper conductive layer, and the lower end is spaced apart from the lower conductive layer;
[0008] When the conductive member is pressed downward, the lower end of the conductive metal rod is adapted to abut against the lower conductive layer;
[0009] In the above implementation process, the panel layer provides protection for the electronic components located therebelow. When pressure is applied downward from the panel layer, the elastic strip of the conductive part is deformed after being subjected to a certain pressure. At the same time, the axis moves downward until the end abuts against the lower conductive layer. At this time, the conductive metal rod located in the axis can connect the upper conductive layer and the lower conductive layer. After the circuit is turned on, the light-emitting part can be prompted to emit light, and the light of the light-emitting part can be uniformly emitted through the refraction of the light-guiding layer. The light-guiding layer is arranged in a surrounding manner, so that annular illumination can be achieved around the key. In this scheme, the upper conductive layer and the lower conductive layer are isolated by the annular light-guiding layer, and at the same time, the conductive part with a special structure can have an elastic recovery function while achieving conductivity when pressed downward, thereby providing a favorable premise for further compressing the number of layers of the annular luminous key structure.
[0010] Preferably, the elastic strip is S-shaped;
[0011] In the above implementation process, this solution sets the elastic strip to be S-shaped. It is found in the study that the elastic strip set to this shape has a good rebound effect after being pressed down, which is beneficial to realize the key recovery function of the membrane key structure.
[0012] Preferably, the outer protective layer is made of TPU material;
[0013] In the above implementation process, the outer protective layer in this scheme is made of TPU material. Firstly, the material has good elasticity, which is more conducive to the realization of elastic recovery function. Secondly, it also has good wear resistance, which can effectively improve the pressing life and extend the service life of the key structure.
[0014] Preferably, the outer protective layer and the conductive metal rod are integrally formed by injection molding;
[0015] In the above implementation process, the present solution allows the outer protective layer and the conductive layer to be formed by integral injection molding, which can improve the stability of the combination of the two.
[0016] Preferably, the light guide layer is in an annular structure and is formed with the same first groove and second groove, and the outer diameter of the first groove is greater than the outer diameter of the second groove;
[0017] The conductive member is disposed in the second groove, and the upper conductive layer is disposed in the first groove;
[0018] In the above implementation process, the annular groove formed by the first groove can be used to accommodate the upper conductive layer and the light-emitting component, and the space formed by the second groove can be used to accommodate the conductive component. The double groove design is used to accommodate different structural components respectively to make the connection of each structure more compact, and at the same time, annular light can be achieved.
[0019] Preferably, a third groove is provided on the bottom surface of the first groove, and the light-emitting element is embedded in the third groove;
[0020] In the above implementation process, the third groove can be used to accommodate the light-emitting component, thereby making the assembly of the light-emitting component more stable.
[0021] Preferably, the light-guiding layer is made of light-guiding PC material;
[0022] In the above implementation process, the light guide layer is made of conduit PC material, which can achieve good light scattering effect, thereby improving the ring-shaped luminous effect.
[0023] Preferably, a drip-type protrusion is provided on the side of the panel layer facing away from the upper conductive layer, and the protrusion is made of polyurethane material;
[0024] In the above implementation process, the panel layer is further provided with a drip-shaped protrusion made of polyurethane material, which can increase the key feel of the membrane key and enhance the user experience.
[0025] Preferably, a mounting hole is provided on the substrate;
[0026] In the above implementation process, the user can assemble the button structure on the relevant product through a fixing mechanism such as a fastening screw in conjunction with the mounting hole. The structure is simple and the assembly is quick and easy.
[0027] Preferably, a static contact is provided on the lower conductive layer below the axial core portion, and the conductive metal rod is suitable for abutting against the static contact to form an electrical connection;
[0028] In the above implementation process, the static contact formed on the lower conductive layer promotes smooth electrical conduction between the upper conductive layer and the lower conductive layer, reduces the probability of poor contact, and improves the user experience.
[0029] Compared with the prior art, the beneficial effect of the present application lies in that the present solution uses an annular light-guiding layer to isolate the upper conductive layer and the lower conductive layer, and at the same time utilizes a specially structured conductive part to achieve downward pressure conduction while also having an elastic recovery function, thereby providing a favorable premise for further compressing the number of layers of the annular luminous button structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0031] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the present application;
[0032] Figure 2It is a schematic structural diagram of a conductive member in one embodiment of the present application;
[0033] Figure 3 It is a partial structural schematic diagram of one embodiment of the present application;
[0034] Among them: 11, panel layer; 12, substrate; 21, upper conductive layer; 22, lower conductive layer; 221, static contact; 30, conductive part; 31, conductive metal rod; 32, outer protective layer; 321, axial part; 322, elastic strip; 40, light-guiding layer; 50, light-emitting part; 60, drip-type protrusion; 70, mounting hole. DETAILED DESCRIPTION
[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0036] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.
[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0038] In the description of the present application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0039] In the description of this application, it should be noted that the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.
[0040] It should also be noted that, in the embodiments of the present application, the same figure mark is used to represent the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.
[0041] In order to further understand the content, features and effects of the utility model of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:
[0042] Example
[0043] Among many application demand fields, annular lighting is one of the common requirements for membrane switches, which requires that a circle-shaped lighting range can be realized around the membrane switch after conduction; such a membrane switch structure generally consists of at least six layers of materials, including an upper surface layer, an LED layer, an upper conductive layer, an insulating isolation layer, a lower conductive layer and a lower surface layer, wherein a metal spring is used to contact the upper conductive layer. When pressed down, the metal spring can connect the upper conductive layer and the lower conductive layer to realize circuit conduction and finally make the LED bulb in the LED layer emit light; during use, due to the limitation of the number of layers, the product thickness cannot be further reduced. In addition, the uniformity of the annular lighting is also poor, and there is a certain room for improvement; in order to solve the above technical problems, this embodiment provides the following technical solutions:
[0044] For details, see Figure 1-3 This embodiment provides a ring-shaped luminous membrane key structure, including a panel layer 11, an upper conductive layer 21, a light guide layer 40, a lower conductive layer 22, a substrate 12, a conductive member 30 and a light emitting member 50;
[0045] Specifically, the light emitting element 50 is electrically connected to the upper conductive layer 21, the upper conductive layer 21 is disposed below the panel layer 11, the light guide layer 40 is disposed between the upper conductive layer 21 and the lower conductive layer 22; the lower conductive layer 22 is disposed on the substrate 12;
[0046] Specifically, a conductive member 30 is provided in the annular space formed by the upper conductive layer 21, the lower conductive layer 22 and the light guide layer 40; the conductive member 30 includes an outer protective layer 32, the outer protective layer 32 is a columnar axis portion 321 and a plurality of elastic strips 322 arranged around the axis portion 321, a conductive metal rod 31 is provided in the axis portion 321, the upper end of the conductive metal rod 31 abuts against the upper conductive layer 21, and the lower end is spaced apart from the lower conductive layer 22;
[0047] Furthermore, when the conductive member 30 is pressed downward, the lower end of the conductive metal rod 31 is adapted to abut against the lower conductive layer 22;
[0048] In the above scheme, the panel layer 11 provides protection for the electronic components located therebelow. When pressing down from the panel layer 11, the elastic strip 322 of the conductive member 30 is deformed after being subjected to a certain pressure. At the same time, the axis portion 321 moves downward until the end abuts against the lower conductive layer 22. At this time, the conductive metal rod 31 located in the axis portion 321 can connect the upper conductive layer 21 and the lower conductive layer 22. After the circuit is turned on, the light-emitting member 50 can be prompted to emit light. The light of the light-emitting member 50 is uniformly emitted through the refraction of the light-guiding layer 40. The light-guiding layer 40 is arranged in a surrounding manner, so that annular emission can be achieved around the key. In this scheme, the annular light-guiding layer 40 is used to isolate the upper conductive layer 21 and the lower conductive layer 22. At the same time, the conductive member 30 with a special structure can have an elastic recovery function while achieving downward conductivity, thereby providing a favorable premise for further compressing the number of layers of the annular luminous key structure.
[0049] It should be noted that the membrane key structure provided in the present application is a part of the structure of the membrane switch panel. In actual applications, a membrane switch panel may have multiple such structures and other types of key structures. The circuit connection part in the membrane key structure is a relatively mature part in this field. Therefore, how the circuits of each key structure are connected to form a complete switch panel is not further elaborated in this embodiment.
[0050] Further, the elastic strip 322 is S-shaped;
[0051] In the above scheme, the elastic strip 322 is set to be S-shaped. It is found in the research that the elastic strip 322 set to this shape has a good rebound effect after being pressed down, which is conducive to realizing the key recovery function of the membrane key structure.
[0052] Specifically, the outer protective layer 32 is made of TPU material;
[0053] In the above scheme, the outer protective layer 32 in this scheme is made of TPU material. Firstly, the material has good elasticity, which is more conducive to the realization of elastic recovery function. Secondly, it also has good wear resistance, which can effectively improve the pressing life and extend the service life of the key structure.
[0054] Specifically, the outer sheath 32 and the conductive metal rod 31 are integrally formed by injection molding;
[0055] In the above scheme, the outer protective layer 32 and the conductive layer are formed by integral injection molding, which can make the combination stability of the two better.
[0056] Specifically, the light guide layer 40 is annular in structure and is formed with the same first groove and second groove, and the outer diameter of the first groove is greater than the outer diameter of the second groove;
[0057] For further information, see Figure 1 and Figure 3 , the conductive member 30 is disposed in the second groove, and the upper conductive layer 21 is disposed in the first groove;
[0058] In the above scheme, the annular groove formed by the first groove can be used to accommodate the upper conductive layer 21 and the light-emitting component 50, and the space formed by the second groove can be used to accommodate the conductive component 30. The double groove design is used to accommodate different structural components respectively to make the connection of each structure more compact, and at the same time, annular light can be achieved.
[0059] For details, see Figure 3 A third groove is provided on the bottom surface of the first groove, and the light emitting member 50 is embedded in the third groove;
[0060] In the above solution, the third groove can be used to accommodate the light emitting member 50, thereby making the assembly of the light emitting member 50 more stable.
[0061] Specifically, a drip-type protrusion is provided on the side of the panel layer 11 facing away from the conductive layer 21, and the protrusion is made of polyurethane material;
[0062] In the above solution, the panel layer 11 is further provided with a drip-shaped protrusion 60 made of polyurethane material, which can increase the key feel of the membrane key and improve the user experience.
[0063] In one embodiment, a mounting hole 70 is provided on the substrate 12;
[0064] In the above solution, the user can assemble the key structure on the relevant product through a fixing mechanism such as a fastening screw in conjunction with the mounting hole 70, which has a simple structure and is quick and easy to assemble.
[0065] Specifically, a static contact 221 is provided on the lower conductive layer 22 below the axial portion 321, and the conductive metal rod 31 is suitable for abutting against the static contact 221 to form an electrical connection;
[0066] In the above solution, the static contact 221 formed on the lower conductive layer 22 promotes smooth electrical conduction between the upper conductive layer 21 and the lower conductive layer 22, reduces the probability of poor contact, and improves the user experience.
[0067] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.
[0068] The above description is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application are within the scope of the technical solution of the present application.
Claims
1. A ring-shaped luminous membrane key structure, characterized in that: It includes a panel layer, an upper conductive layer, a light-guiding layer, a lower conductive layer, a substrate, a conductive element and a light-emitting element; The light emitting element is electrically connected to the upper conductive layer, the upper conductive layer is arranged below the panel layer, the light guide layer is arranged between the upper conductive layer and the lower conductive layer; the lower conductive layer is arranged on the substrate; The conductive member is arranged in the space formed by the upper conductive layer, the lower conductive layer and the light guide layer in an annular shape; the conductive member comprises an outer protective layer, the outer protective layer is a columnar axial portion and a plurality of elastic strips arranged around the axial portion, a conductive metal rod is arranged in the axial portion, the upper end of the conductive metal rod abuts against the upper conductive layer, and the lower end is spaced apart from the lower conductive layer; When the conductive member is pressed downward, the lower end of the conductive metal rod is adapted to abut against the lower conductive layer.
2. The ring-shaped luminous membrane key structure according to claim 1, characterized in that: The elastic strip is S-shaped.
3. The ring-shaped luminous membrane key structure according to claim 2, characterized in that: The outer protective layer is made of TPU material.
4. The ring-shaped luminous membrane key structure according to claim 3, characterized in that: The outer protective layer and the conductive metal rod are integrally formed by injection molding.
5. The ring-shaped luminous membrane key structure according to any one of claims 1 to 4, characterized in that: The light guide layer is in an annular structure and is formed with a first groove and a second groove that are identical, and the outer diameter of the first groove is greater than the outer diameter of the second groove; The conductive element is disposed in the second groove, and the upper conductive layer is disposed in the first groove.
6. The ring-shaped luminous membrane key structure according to claim 5, characterized in that: A third groove is provided on the bottom surface of the first groove, and the light emitting element is embedded in the third groove.
7. The ring-shaped luminous membrane key structure according to claim 6, characterized in that: The light guide layer is made of light guide PC material.
8. The ring-shaped luminous membrane key structure according to claim 7, characterized in that: A drip-type protrusion is arranged on the side of the panel layer facing away from the upper conductive layer, and the protrusion is made of polyurethane material.
9. The ring-shaped luminous membrane key structure according to claim 8, characterized in that: A mounting hole is provided on the base plate.
10. The ring-shaped luminous membrane key structure according to claim 5, characterized in that: A static contact point is arranged on the lower conductive layer below the axial core portion, and the conductive metal rod is suitable for abutting against the static contact point to form an electrical connection.