Elastic sheet silica gel key

Abstract

The utility model provides an elastic sheet silica gel key. The elastic sheet silica gel key comprises a silica gel key, an adhesive layer and a metal elastic sheet which are sequentially stacked, the thickness of the adhesive layer ranges from 0.05 mm to 0.15 mm, and the tearing strength of the adhesive layer ranges from 6280 kN / m < 2 > to 19790 kN / m < 2 >. The silica gel key and the metal elastic sheet are directly bonded through the adhesive layer to obtain the elastic sheet silica gel key, so that the cost is saved, and the product yield and the production efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of keys, and relates to a spring-type silicone key. Background Art

[0002] With the development of modern electronic technology, electronic products have become increasingly integrated into people's lives. Various electronic products, such as medical devices, car control buttons, push-to-start buttons, mobile phones, laptops, and remote controls, are part of our daily lives. As the primary input device for these electronic products, keypad units play a particularly important role.

[0003] There are two main methods for manufacturing existing buttons: one is to replace the conductive contacts of silicone buttons with PET film buttons, which can basically meet the requirements of general factories. Its disadvantages are that the resistance of the conductive contacts is not small enough, the life is not long enough, and the segment feel is not very good; the other is to replace the conductive contacts of silicone buttons with metal shrapnel. Its advantages are low resistance, short stroke design, and good segment feel. The disadvantage is that the single metal shrapnel is fixed with double-sided tape and PET (polyethylene terephthalate) film / TPU (polyester thermoplastic polyurethane) film.

[0004] CN201946466U discloses an integrated shrapnel contact key, comprising a key body, a glue layer, a polyester sheet, and a metal shrapnel, and also comprising a TPU layer and a UV glue contact. The key body, glue layer, TPU layer, UV glue contact, polyester sheet, and metal shrapnel are arranged in sequence from top to bottom. The key body and the TPU layer are bonded together under pressure through the glue layer to form a whole. The UV glue contact is bonded to the polyester sheet as a whole to form a polyester sheet with UV glue contact. The whole formed by the key body, glue layer, and TPU layer is in elastic contact with the polyester sheet with UV glue contact, and the back of the polyester sheet is in contact with the metal shrapnel. However, the above-mentioned key has a complex structure, a complicated assembly process, and high cost, which is not conducive to mass production.

[0005] Although the structure and assembly process of the key have been simplified in the prior art, TPU material or PET material must still be used when assembling the silicone key, which adds an additional TPU / PET processing step.

[0006] In summary, designing a silicone keypad with a simplified structure to improve the production efficiency and yield of the product is an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a shrapnel silicone keypad, in which the silicone keypad and the metal shrapnel are directly bonded together through an adhesive layer to obtain a shrapnel silicone keypad.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] The utility model provides a shrapnel silicone keypad, which comprises a silicone keypad, an adhesive layer and a metal shrapnel which are stacked in sequence;

[0010] The thickness of the adhesive layer is 0.05-0.15 mm, for example, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm or 0.14 mm, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0011] The adhesive layer has a tear strength of 6280-19790 kN / m 2 The adhesive layer can be, for example, 7000 kN / m 2 、8000kN / m 2 , 9000kN / m 2 、10000kN / m 2 、12000kN / m 2 、14000kN / m 2 、15000kN / m 2 or 18000kN / m 2 The present invention is not limited to the listed values, and other values ​​not listed in the numerical range are also applicable.

[0012] The utility model adopts an adhesive layer with a specific tear strength and thickness range to directly bond the silicone key and the metal shrapnel to obtain a shrapnel silicone key. The shrapnel silicone key has the characteristics of the silicone key itself and the advantages of low resistance and short stroke of the metal shrapnel, overcoming the shortcomings of PET processing and the need for discharge treatment of the silicone key in the prior art. The shrapnel silicone key has the advantages of low cost, simplified structure, and long service life.

[0013] As a preferred technical solution of the present invention, the silicone keypad includes a support body, a trigger body, and an elastic wall connecting the support body and the trigger body.

[0014] As a preferred technical solution of the present invention, the shape of the elastic wall includes an arc shape or a convex shape.

[0015] Preferably, the trigger body is provided with protrusions, and the number of the protrusions is at least two, for example, two, three or four.

[0016] Preferably, the shape of the protrusion includes a cylindrical shape.

[0017] Preferably, the length of the protrusion is 0.08-0.12 mm, for example, it can be 0.085 mm, 0.09 mm, 0.095 mm, 0.1 mm, 0.105 mm, 0.11 mm or 0.115 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0018] As a preferred technical solution of the present invention, the protrusions are coated with an adhesive layer.

[0019] As a preferred technical solution of the present invention, the thickness of the adhesive layer is 0.13-0.15 mm, for example, it can be 0.132 mm, 0.135 mm, 0.137 mm, 0.14 mm, 0.142 mm, 0.145 mm or 0.147 mm, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0020] As the preferred technical solution of the present invention, the adhesive layer has a tear strength of 12500-19790 kN / m 2 The adhesive layer can be, for example, 13000 kN / m 2 、14000kN / m 2 、15000kN / m 2 、16000kN / m 2 、18000kN / m 2 or 19000kN / m 2 The present invention is not limited to the listed values, and other values ​​not listed in the numerical range are also applicable.

[0021] As a preferred technical solution of the present invention, the adhesive layer is an RT-12 adhesive layer.

[0022] In the present invention, the RT-12 adhesive layer serves as a bonding layer, which has excellent tear resistance and can stably fit the metal shrapnel and the silicone button.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The shrapnel silicone keypad provided by the utility model adopts an adhesive layer with a specific tear strength and thickness range to directly bond the silicone keypad and the metal shrapnel to obtain a shrapnel silicone keypad. The shrapnel silicone keypad has the characteristics of the silicone keypad itself and the advantages of the metal shrapnel, such as low resistance and short stroke. It overcomes the shortcomings of PET processing and the need for discharge treatment of the silicone keypad in the prior art. The shrapnel silicone keypad has the advantages of low cost, simplified structure, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram of the spring-type silicone keypad provided in Example 1;

[0026] Figure 2 A schematic diagram of the structure of the spring-type silicone button provided in Example 2;

[0027] Among them, 1-silicone button, 2-adhesive layer, 3-metal spring, 4-support body, 5-trigger body, 6-protrusion, 7-elastic wall. DETAILED DESCRIPTION

[0028] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] It should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] Example 1

[0032] This embodiment provides a spring-type silicone keypad, the spring-type silicone keypad (such as Figure 1 The present invention comprises a silicone button 1, an adhesive layer 2 and a metal dome 3 which are stacked in sequence;

[0033] The silicone keypad 1 includes a support body 4, a trigger body 5, and an elastic wall 7 connecting the support body and the trigger body; the elastic wall 7 is arc-shaped; the trigger body 5 is provided with two protrusions 6; the protrusions 6 are cylindrical; the length of the protrusions 6 is 0.1 mm; the protrusions 6 are coated with an adhesive layer 2;

[0034] The thickness of the adhesive layer 2 is 0.14 mm and the tear strength is 11000 kN / m 2 the adhesive layer 2 is RT-12 adhesive layer.

[0035] In this embodiment, the silicone key and the metal dome are directly bonded together through an adhesive layer to obtain a dome silicone key, which simplifies the structure of the dome silicone key.

[0036] Example 2

[0037] This embodiment provides a spring-type silicone keypad, the spring-type silicone keypad (such as Figure 2 The present invention comprises a silicone button 1, an adhesive layer 2 and a metal dome 3 which are stacked in sequence;

[0038] The silicone keypad 1 includes a support body 4, a trigger body 5, and an elastic wall 7 connecting the support body and the trigger body; the elastic wall 7 has a convex shape; the trigger body 5 is provided with two protrusions 6; the protrusions 6 are cylindrical; the length of the protrusions 6 is 0.12 mm; and the protrusions 6 are coated with an adhesive layer 2;

[0039] The thickness of the adhesive layer 2 is 0.06 mm and the tear strength is 18000 kN / m 2 the adhesive layer 2 is RT-12 adhesive layer.

[0040] In this embodiment, the silicone key and the metal dome are directly bonded together through an adhesive layer to obtain a dome silicone key, which simplifies the structure of the dome silicone key.

[0041] Example 3

[0042] This embodiment provides a spring-type silicone keypad, except that the thickness of the adhesive layer is 0.15 mm and the tear strength is 12500 kN / m 2 Except for the adhesive layer, everything else is the same as in Example 1.

[0043] In this embodiment, the silicone key and the metal dome are directly bonded together through an adhesive layer to obtain a dome silicone key, which simplifies the structure of the dome silicone key.

[0044] Comparative Example 1

[0045] This comparative example provides a spring-type silicone keypad, which is the same as Example 1 except that the thickness of the adhesive layer is 0.02 mm.

[0046] In this comparative example, when the thickness of the adhesive layer is too thin, it is not conducive to the stable adhesion of the metal dome and the silicone key, resulting in a decrease in the yield of the dome silicone key.

[0047] Comparative Example 2

[0048] This comparative example provides a spring-type silicone keypad, which is the same as Example 1 except that the thickness of the adhesive layer is 0.2 mm.

[0049] In this comparative example, when the thickness of the adhesive layer is too thick, the key stroke is affected, resulting in a decrease in the yield rate of the spring silicone key.

[0050] Comparative Example 3

[0051] This comparative example provides a spring-type silicone keypad, except that the adhesive layer has a tear strength of 5000 kN / m 2 Except for the adhesive layer, everything else is the same as in Example 1.

[0052] In this comparative example, since the tear strength of the adhesive layer is too low, its bonding ability is affected, resulting in a decrease in the yield rate of the spring silicone keypad.

[0053] The applicant declares that the above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by technicians in the relevant technical field within the technical scope disclosed in the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A shrapnel silicone button, characterized in that: The shrapnel silicone keypad comprises a silicone keypad, an adhesive layer and a metal shrapnel stacked in sequence; The thickness of the adhesive layer is 0.05-0.15 mm; The adhesive layer has a tear strength of 6280-19790 kN / m 2 Adhesive layer; The silica gel button comprises a supporting body, a triggering body and an elastic wall connecting the supporting body and the triggering body.

2. The shrapnel silicone key according to claim 1, characterized in that: The elastic wall is in an arc shape; The trigger body is provided with protrusions, and the number of the protrusions is at least two; The shape of the protrusion is cylindrical; The length of the protrusion is 0.08-0.12 mm.

3. The shrapnel silicone key according to claim 2, characterized in that: The protrusions are coated with an adhesive layer.

4. The shrapnel silicone key according to claim 1, characterized in that: The thickness of the adhesive layer is 0.13-0.15 mm.

5. The shrapnel silicone key according to claim 1, characterized in that: The adhesive layer has a tear strength of 12500-19790 kN / m 2 adhesive layer.

6. The shrapnel silicone key according to claim 1, characterized in that: The adhesive layer is an RT-12 adhesive layer.

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