Switch module with exhaust function

Abstract

The utility model provides a switch module with an exhaust function, belongs to the technical field of switch modules, and aims to solve the problems that when a membrane switch in the prior art is used, air pressure in the membrane switch is unstable, so that the surface of the membrane switch swells, a metal dome deforms due to offset pressing, a good feedback of a user to the membrane switch is inconvenient, and the service life of the membrane switch is influenced. Comprising a UV guide column, a covering layer, metal domes, a silencing interlayer layer and a circuit layer, the silencing interlayer layer is arranged above the circuit layer, the covering layer is arranged above the silencing interlayer layer, a cavity is formed among the circuit layer, the silencing interlayer layer and the covering layer, the metal domes are arranged in the cavity, and the UV guide column is arranged on the covering layer and located over the tops of the metal domes; a plurality of vent grooves are formed in the silencing interlayer layer and are formed in the peripheral side of the metal dome, and the ends, close to the metal dome, of the vent grooves correspond to the cavities to form semi-closed openings.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch modules, and more specifically, particularly relates to a switch module with exhaust. Background Art

[0002] Membrane switches have compact structure, beautiful appearance, good sealing, moisture resistance, long service life, etc. They are widely used in electronic communications, electronic measurement instruments, industrial control, medical equipment, automotive industry, smart toys, household appliances and other fields.

[0003] A membrane switch is usually a plastic button or a silicone button plus a pot piece plus a PCB or FPC circuit board. When the button is pressed, the pot piece is triggered to deform under the action of external force, so that the center of the pot piece touches the circuit board to make it conductive, thus forming a switch. In order to ensure the stability of the membrane switch, the membrane switch is generally compact in structure and has good airtightness. The pot piece is generally arched. When it fits with the circuit board, there will be a cavity inside. When the membrane switch is pressed, the air in the pot piece cavity cannot be discharged quickly, resulting in unstable air pressure in the membrane switch. Pressing the membrane switch for a long time will cause its surface to bulge, and the pot piece will also shift to a certain extent. Long-term misaligned pressing will cause local deformation of the pot piece, that is, the air pressure inside the membrane switch is unbalanced, which makes it inconvenient to use, affects its service life, and is not convenient for users to give good feedback on the membrane switch (loud sound, press blockage).

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a switch module with exhaust is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a switch module with exhaust to solve the problem in the prior art that when the membrane switch is used, the air pressure inside the membrane switch is unstable, resulting in bulging on its surface, and the pot piece is offset and pressed to cause it to deform, which is not convenient for users to have good feedback on the membrane switch and affects its service life.

[0006] The purpose and effect of the switch module with exhaust in the utility model are achieved by the following specific technical means:

[0007] A switch module with exhaust, comprising a UV guide column, a covering layer, a pot piece, a sound-absorbing interlayer layer, and a circuit layer, wherein the sound-absorbing interlayer layer is arranged above the circuit layer, the covering layer is arranged above the sound-absorbing interlayer layer, a cavity is formed between the circuit layer, the sound-absorbing interlayer layer and the covering layer, a pot piece is arranged in the cavity, and the UV guide column is arranged on the covering layer and is located directly above the top of the pot piece;

[0008] A plurality of ventilation grooves are provided on the sound-absorbing space layer, and the ventilation grooves are arranged on the peripheral side of the pot piece. One end of the ventilation groove close to the pot piece corresponds to the cavity to form a semi-closed opening.

[0009] Furthermore, the thickness of the ventilation groove is equal to the thickness of the sound-absorbing sheet layer, and the sound-absorbing sheet layer is made of foam, EVA foam or sponge with a flexible PU substrate.

[0010] Furthermore, the pot piece is arranged in an arch shape, the bottom of the pot piece is in contact with the circuit layer, and an air cavity is formed between the pot piece and the circuit layer.

[0011] Furthermore, the covering layer includes a planar portion and an arc-shaped portion, two ends of the sound-absorbing sheet layer are connected to the planar portion, and an upper end of the pot piece is connected to the arc-shaped portion.

[0012] Furthermore, the circuit layer is a PCB board or an FPC circuit sheet.

[0013] Compared with the prior art, the utility model has the following beneficial effects.

[0014] By opening a ventilation groove in the sound-absorbing sheet layer and pressing the membrane switch, the air in the air cavity of the pot piece is discharged from the gap between the pot piece and the circuit layer and enters the ventilation groove. When the pot piece rebounds, the air in the ventilation groove enters the pot piece from the gap between the pot piece and the circuit layer, so as to balance the internal air pressure of the membrane switch. The ventilation groove buffers the problem that the pot piece cannot quickly discharge the air in the air cavity when pressed. The ventilation groove can be connected to the external atmosphere due to the air permeability of the sound-absorbing sheet layer material, further balancing the air pressure between the membrane switch and the outside, avoiding the problem of bulging on the surface of the membrane switch due to poor air circulation, and deformation of the pot piece due to displacement, making the membrane switch more stable and reliable, and improving its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the explosion structure of a switch module with exhaust.

[0016] Figure 2 It is a cross-sectional view of a switch module with exhaust in the utility model.

[0017] Figure 3 It is an exploded view of a switch module with exhaust in the utility model.

[0018] Figure 4 It is a stereoscopic diagram of a switch module with exhaust in the utility model.

[0019] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0020] 1. UV guide column; 2. Covering layer; 3. Pot piece; 4. Silencer layer; 5. Circuit layer; 6. Ventilation groove; 7. Cavity; 8. Air cavity; 21. Plane part; 22. Arc part. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example:

[0025] As attached Figure 1 To Attachment Figure 4 As shown:

[0026] A switch module with exhaust comprises a UV guide column 1, a covering layer 2, a pot piece 3, a muffler sheet layer 4, and a circuit layer 5. The muffler sheet layer 4 is arranged above the circuit layer 5, and the covering layer 2 is arranged above the muffler sheet layer 4. The circuit layer 5, the muffler sheet layer 4 and the covering layer 2 are all connected by insulating adhesive sealing glue. A cavity 8 is formed between the circuit layer 5, the muffler sheet layer 4 and the covering layer 2. The pot piece 3 is arranged in the cavity 8. The trigger pot piece 3 is deformed under the action of external force, so that the top center of the pot piece 3 touches the circuit layer 5 to make it conductive, thereby forming a switch function. The UV guide column 1 is arranged on the covering layer 2 and is located above the top of the pot piece 3. The UV material of the UV guide column 1 can ensure the pressing feel while ensuring the pressing conduction stability, and reduces the pressing stroke, physically eliminating a certain impact force, reducing the noise of the membrane switch button, and giving the user a good feedback;

[0027] A plurality of ventilation grooves 6 are provided on the sound-absorbing sheet layer 4, and the number of ventilation grooves 6 is based on the ability to balance the internal air pressure of the membrane switch, that is, the air pressure discharged from the pot piece 3. The ventilation grooves 6 are arranged on the peripheral side of the pot piece 3, and one end of the ventilation groove 6 close to the pot piece 3 corresponds to the cavity 8 to form a semi-closed opening, ensuring that the gap between the pot piece 3 and the circuit layer 5 and the ventilation groove 6 can be conductive. Specifically, when the membrane switch is pressed, the air in the air cavity 7 of the pot piece 3 is discharged from the gap between the pot piece 3 and the circuit layer 5 and enters the ventilation groove 6. When the pot piece 3 rebounds, the ventilation The air in the groove 6 enters the pot piece 3 from the gap between the pot piece 3 and the circuit layer 5 to balance the air pressure inside the membrane switch. It should be noted that the function of the ventilation groove 6 is to buffer the pot piece 3 so that the air in the air cavity 7 cannot be quickly discharged when pressed. The ventilation groove 6 can be connected to the external atmosphere due to the air permeability of the sound-absorbing interlayer 4, further balancing the membrane switch and the external air pressure, avoiding the problem of bulging on the surface of the membrane switch due to poor air circulation, and the displacement and deformation of the pot piece 3, making the membrane switch more stable and reliable and improving its service life.

[0028] Among them, the thickness of the ventilation groove 6 is equal to the thickness of the sound-absorbing interlayer 4, ensuring that the bottom of the ventilation groove 6 can be at the same level as the gap between the pot piece 3 and the circuit layer 5, and can conduct the air discharged from the air cavity 7. The sound-absorbing interlayer 4 adopts foam, EVA foam or sponge with a flexible PU substrate. The sound-absorbing interlayer 4 replaces the interlayer of the traditional membrane switch to make the membrane switch thinner and more stable. At the same time, the soft material characteristics of the sound-absorbing interlayer 4 can buffer a certain impact force and reduce the noise of the membrane switch, and its air permeability can allow the ventilation groove 6 to be connected to the external atmosphere, avoiding the imbalance between the internal air pressure and the external air pressure of the membrane switch, improving the stability of the membrane switch, and increasing its service life.

[0029] Among them, the pot piece 3 is arranged in an arch shape. The shape of the pot piece 3 is not limited to the circle in the figure, and can be an ellipse, triangle, cross, quadrilateral, etc. that can adapt to the pot piece 3 of the structure of the utility model. The bottom of the pot piece 3 is in contact with the circuit layer 5, and an air cavity 7 is formed between the pot piece 3 and the circuit layer 5. The bottom of the pot piece 3 is connected to the circuit layer 5, and there is a fitting gap therebetween for the air in the air cavity 7 to be connected with the ventilation groove 6. The bottom of the pot piece 3 is connected to the circuit on the circuit board. When the membrane switch is pressed, the pot piece 3 is deformed. When the top touches the circuit layer 5, the circuit is connected. The pot piece 3 rebounds and the circuit is disconnected, and a switch effect is formed based on this principle.

[0030] Among them, the covering layer 2 includes a flat portion 21 and a curved portion 22, both ends of the sound-absorbing interlayer 4 are connected to the flat portion 21, and the upper end of the pot piece 3 is connected to the curved portion 22. The flat portion 21 and the curved portion 22 are connected to the sound-absorbing interlayer 4 and the pot piece 3 by adhesive sealing glue. The function of the covering layer 2 is to fix the sound-absorbing interlayer 4 and the pot piece 3, so that the entire membrane switch is more compact and its sealing stability is improved.

[0031] The circuit layer 5 is a PCB board or an FPC circuit sheet, and the circuit layer 5 serves to connect external consumer electronic devices.

[0032] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A switch module with exhaust, characterized in that: include: A UV guide column (1), a covering layer (2), a pot (3), a sound-absorbing interlayer (4), and a circuit layer (5), wherein the sound-absorbing interlayer (4) is arranged above the circuit layer (5), the covering layer (2) is arranged above the sound-absorbing interlayer (4), a cavity (8) is formed between the circuit layer (5), the sound-absorbing interlayer (4), and the covering layer (2), a pot (3) is arranged in the cavity (8), and the UV guide column (1) is arranged on the covering layer (2) and is located directly above the top of the pot (3); The muffler sheet layer (4) is provided with a plurality of ventilation grooves (6), the ventilation grooves (6) being arranged on the peripheral side of the pot piece (3), and one end of the ventilation groove (6) close to the pot piece (3) corresponds to the cavity (8) to form a semi-closed opening.

2. A switch module with exhaust according to claim 1, characterized in that: The thickness of the ventilation groove (6) is equal to the thickness of the sound-absorbing interlayer (4), and the sound-absorbing interlayer (4) is made of foam with a flexible PU substrate, EVA foam or sponge.

3. A switch module with exhaust according to claim 1, characterized in that: The pot piece (3) is arranged in an arch shape, the bottom of the pot piece (3) is in contact with the circuit layer (5), and an air cavity (7) is formed between the pot piece (3) and the circuit layer (5).

4. A switch module with exhaust according to claim 1, characterized in that: The covering layer (2) comprises a plane portion (21) and an arc-shaped portion (22); two ends of the sound-absorbing interlayer (4) are connected to the plane portion (21); and the upper end of the pot (3) is connected to the arc-shaped portion (22).

5. A switch module with exhaust according to claim 1, characterized in that: The circuit layer (5) is a PCB board or an FPC circuit sheet.

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