Metal film key bump fitting structure

Abstract

The utility model discloses a metal film key salient point fitting structure, which comprises a gasket, metal elastic sheets, salient point blocks and a diaphragm, and further comprises a ring mouth pad, a surface rib ring, a claw separating foot, an inner rib ring and a trisection rib strip, the metal elastic sheets are symmetrically bonded on the upper surface of the gasket, the salient point blocks are bonded between the top convex surfaces of the metal elastic sheets and the diaphragm, and the surface rib ring is arranged on the surface rib ring. A ring opening pad is bonded between the back face, far away from the diaphragm, of the protruding point block and the top protruding face of the metal elastic piece, and a surface rib ring is arranged on the outer arc face, far away from the ring opening pad, of the metal elastic piece in a protruding mode. According to the metal film key, the convex point block and the metal elastic sheet are attached through the ring opening pad in a pressing mode to form soft elastic force over-protection, the strength of the metal elastic sheet with the strengthened inner face and outer face is good, the pressing deformation service life of the metal elastic sheet is prolonged, and the service life of the metal film key is indirectly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of metal film keys, in particular to a metal film key convex point laminating structure. Background Art

[0002] Membrane keys are a piece of PET sheet with contacts (including metal springs, also called pot pieces), which are used as switches on circuit boards such as PCB and FPC, and play an important role as tactile switches between users and instruments. Compared with traditional silicone keys, membrane keys have better feel and longer life, which can indirectly improve the production efficiency of various types of switches using conductive films. The contacts on the membrane keys are located on the conductive part of the PCB board (most of them are located above the gold fingers on the circuit board). When the key is pressed by external force, the center point of the contact is concave and contacts the circuit on the PCB, thus forming a loop. Current passes through, and the entire product can work normally. There is a type of metal membrane keys among membrane keys.

[0003] At present, when the metal film is pressed, a metal spring is usually set at the gasket of the metal film case as the convex pressure part. When the metal film key is pressed, the rebound of the metal spring brings the feedback of the action touch. However, the metal film keys on the market are usually set in a single-layer metal spring and the convex point, which makes the touch and pressure life of the convex point and the metal spring short after being bonded, thus affecting the subsequent use of the metal film keys. For this reason, we propose a metal film key convex point bonding structure. Utility Model Content

[0004] The main purpose of the utility model is to provide a metal film keypad convex bonding structure, in which the metal spring sheet and the convex block are improved between the gasket and the diaphragm of the metal film keypad, so that the convex block and the metal spring sheet are pressed and bonded with a ring pad to form soft elastic over-protection, and the metal spring sheet has better strength after being reinforced inside and outside, thereby extending the pressing deformation life of the metal spring sheet, indirectly improving the service life of the metal film keypad, and can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A metal film keypad convex point fitting structure comprises a gasket, a metal spring, a convex point block and a diaphragm, and also comprises a ring pad, a surface rib ring, a claw foot, an inner rib ring and a three-part rib strip. The upper surface of the gasket is symmetrically bonded with metal springs, and a convex point block is bonded between the top convex surface of the metal spring and the diaphragm, a ring pad is bonded between the back surface of the convex point block away from the diaphragm and the top convex surface of the metal spring, and a surface rib ring is raised on the outer arc surface of the metal spring away from the ring pad, the sheet body of the diaphragm covers the convex point block, the surface rib ring and the surface of the metal spring and is bonded to the edge of the gasket, the inner arc surface of the metal spring away from the surface rib ring is raised with an inner rib ring, and a three-part rib strip is fixed on the outer ring of the inner rib ring facing the inner arc surface of the metal spring.

[0007] Furthermore, the diaphragm is integrally formed with a thick portion at the membrane body close to the bump block, and the diameter of the thick portion is the same as the diameter of the bump block; the thick portion is provided at the diaphragm to increase the thickness, thereby extending the pressing and covering protection of the diaphragm for the bump block.

[0008] Furthermore, three groups of three-part ribs are fixed at three points on the inner arc surface of the outer ring of the inner rib ring facing the metal spring sheet, and the bar body of the three-part ribs is an arc-shaped bar body; three groups of three-part ribs are used outside the inner rib ring to reinforce the metal spring sheet.

[0009] Furthermore, the inner rib ring has a body diameter smaller than the outer rib ring opening diameter; the inner rib ring and the outer rib ring can form a composite structural reinforcement part at the inner and outer arc surfaces of the metal spring, thereby extending the compression deformation life of the metal spring.

[0010] Furthermore, the pad body diameter of the ring pad is the same as the disc-shaped block diameter of the convex block, and a ring is provided in the middle of the pad body of the ring pad; the convex block can better press the ring pad to adhere to the surface of the metal spring.

[0011] Furthermore, the claw feet are integrally formed with four groups at the edge of the metal spring sheet, and the four groups of plates of the claw feet are cross-shaped and arranged at the edge of the metal spring sheet; the claw feet increase the contact and bonding area between the metal spring sheet and the gasket at the edge of the metal spring sheet.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model improves the metal spring piece and the bump block between the gasket and the membrane of the metal film key, so that the bump block and the metal spring piece are pressed together with a ring pad to form soft elastic over-protection, and the metal spring piece has good strength after being reinforced inside and outside, thereby extending the pressing deformation life of the metal spring piece and indirectly improving the service life of the metal film key. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1The utility model is a schematic diagram of the overall structure of a metal film key convex point bonding structure.

[0015] Figure 2 It is an exploded view of a metal film key convex point bonding structure of the utility model.

[0016] Figure 3 The utility model is a schematic diagram of the back arc surface structure of the metal spring of the metal film key convex point bonding structure.

[0017] In the figure: 1. gasket; 2. metal spring; 3. convex block; 4. diaphragm; 5. ring gasket; 6. surface rib ring; 7. claw foot; 8. inner rib ring; 9. three-part rib strip; 10. thick point part. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-3 As shown, a metal film key button convex point bonding structure includes a gasket 1, a metal spring 2, a convex point block 3 and a diaphragm 4, and also includes a ring pad 5, a surface rib ring 6, a claw foot 7, an inner rib ring 8 and a three-part rib 9. The upper surface of the gasket 1 is symmetrically bonded with the metal spring 2, and the convex point block 3 is bonded between the top convex surface of the metal spring 2 and the diaphragm 4, the ring pad 5 is bonded between the back of the convex point block 3 away from the diaphragm 4 and the top convex surface of the metal spring 2, and the outer arc surface of the metal spring 2 away from the ring pad 5 is convex with a surface rib ring 6, the sheet body of the diaphragm 4 covers the convex point block 3, the surface rib ring 6 and the surface of the metal spring 2 and is bonded to the edge of the gasket 1, the inner arc surface of the metal spring 2 away from the surface rib ring 6 is convex with an inner rib ring 8, and the outer circle of the inner rib ring 8 faces the inner arc surface of the metal spring 2 and is fixed with a three-part rib 9.

[0020] Among them, the diaphragm 4 is integrally formed with a thick point portion 10 at the membrane body close to the bump block 3, and the diameter of the thick point portion 10 is the same as the diameter of the bump block 3; the thick point portion 10 is provided at the diaphragm 4 to increase the thickness, thereby extending the pressing and covering protection of the diaphragm 4 for the bump block 3.

[0021] Among them, three groups of three-part ribs 9 are fixed at three points on the inner arc surface of the outer ring of the inner rib ring 8 facing the metal spring piece 2, and the bar body of the three-part ribs 9 is an arc-shaped bar body; three groups of three-part ribs 9 are used outside the inner rib ring 8 to reinforce the metal spring piece 2.

[0022] Among them, the ring body diameter of the inner rib ring 8 is smaller than the ring opening diameter of the outer rib ring 6; the inner rib ring 8 and the outer rib ring 6 can form a composite structural reinforcement part at the inner and outer arc surfaces of the metal spring 2 to extend the compression deformation life of the metal spring 2.

[0023] The pad body diameter of the ring pad 5 is the same as the disc-shaped block diameter of the bump block 3 , and a ring is provided in the middle of the pad body of the ring pad 5 ; the bump block 3 can better press the ring pad 5 to adhere to the surface of the metal spring sheet 2 .

[0024] Among them, the claw feet 7 are integrally formed in four groups at the edge of the metal spring sheet 2, and the four groups of plates of the claw feet 7 are arranged in a cross shape at the edge of the metal spring sheet 2; the claw feet 7 increase the contact and bonding area between the metal spring sheet 2 and the gasket 1 at the edge of the metal spring sheet 2.

[0025] It should be noted that the utility model is a metal film keypad convex point bonding structure. After the metal spring 2 and the convex point block 3 are improved between the gasket 1 and the diaphragm 4 of the metal film keypad, the edge of the metal spring 2 has a claw foot 7 that is bonded to the gasket 1 over a large area, and then the inner and outer surfaces of the metal spring 2 are respectively provided with an inner rib ring 8 and a surface rib ring 6, which can form a composite structural reinforcement part at the inner and outer arc surfaces of the metal spring 2, prolonging the pressing deformation life of the metal spring 2, and at the same time, the outer surface of the inner rib ring 8 is provided with three The three-part ribs 9 of the group reinforce the metal spring 2, and the bump block 3 and the metal spring 2 are bonded with the ring pad 5. When the bump block 3 is under pressure, the ring pad 5 forms a soft elastic transition to protect the pressing contact between the bump block 3 and the metal spring 2, and the diaphragm 4 is provided with a thick point portion 10 to increase the thickness, extending the pressing covering protection of the diaphragm 4 for the bump block 3, so that the reinforced metal spring 2 can better fit the bump block 3 between the gasket 1 and the diaphragm 4 of the metal film button for long-term use.

[0026] It should be noted that the utility model is a metal film keypad convex point bonding structure, and the components in the utility model are all components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A metal film keypad convex point bonding structure, comprising a gasket (1), a metal spring (2), a convex point block (3) and a membrane (4), characterized in that: It also includes a ring-shaped gasket (5), a surface rib ring (6), a claw foot (7), an inner rib ring (8) and a three-part rib strip (9). The upper surface of the gasket (1) is symmetrically bonded with a metal spring (2), and a convex block (3) is bonded between the top convex surface of the metal spring (2) and the diaphragm (4). The ring-shaped gasket (5) is bonded between the back surface of the convex block (3) away from the diaphragm (4) and the top convex surface of the metal spring (2), and the outer arc surface of the metal spring (2) away from the ring-shaped gasket (5) is convex with a surface rib ring (6). The sheet body of the diaphragm (4) covers the convex block (3), the surface rib ring (6) and the surface of the metal spring (2) and is bonded to the edge of the gasket (1). The inner arc surface of the metal spring (2) away from the surface rib ring (6) is convex with an inner rib ring (8), and the outer ring of the inner rib ring (8) is fixed with a three-part rib strip (9) facing the inner arc surface of the metal spring (2).

2. The metal film keypad convex point bonding structure according to claim 1, characterized in that: The membrane sheet (4) is integrally formed with a thick point portion (10) at the membrane body close to the bump block (3), and the diameter of the thick point portion (10) is the same as the diameter of the bump block (3).

3. The metal film keypad convex point bonding structure according to claim 1, characterized in that: The three-part ribs (9) are fixed in three groups at three points on the inner arc surface of the outer ring of the inner rib ring (8) facing the metal spring sheet (2), and the bar body of the three-part ribs (9) is an arc-shaped bar body.

4. The metal film keypad convex point bonding structure according to claim 1, characterized in that: The ring body diameter of the inner rib ring (8) is smaller than the ring opening diameter of the outer rib ring (6).

5. The metal film keypad convex point bonding structure according to claim 1, characterized in that: The pad body diameter of the ring-mouth pad (5) is the same as the disc-shaped block diameter of the convex point block (3), and a ring mouth is arranged in the middle of the pad body of the ring-mouth pad (5).

6. The metal film keypad convex point bonding structure according to claim 1, characterized in that: The claw feet (7) are integrally formed in four groups on the edge of the metal spring sheet (2), and the four groups of plates of the claw feet (7) are arranged in a cross shape on the edge of the metal spring sheet (2).

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