Anti-pressing touch switch

Abstract

An anti-pressing touch switch comprises a base, an overload sheet, an upper seat and a switch push handle, a push handle part is formed at the bottom of one end of the switch push handle in an accommodating cavity of the upper seat, first limiting ribs are uniformly distributed on the peripheral wall surface above the push handle part, and the outer contour of each first limiting rib is larger than the diameter of the cavity. An elastic waterproof film and an inner pressing piece are further sequentially arranged between the push handle part and the overload piece, the elastic waterproof film is bonded to the upper surface of the base to seal an opening of the cavity of the base, the inner pressing piece is of an assembled structure, an elastic buffering piece is arranged at the assembled position, and the elastic waterproof film and the inner pressing piece form buffering for the push handle part. According to the utility model, the whole structure is reasonable, the overload sheet is not easy to damage, the service life of the product is long, the use effect of the product is good, the false triggering in a non-working state can be effectively avoided, and the waterproof effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of light touch switches, in particular to a pressure-proof light touch switch. Background Art

[0002] The existing key switch includes a button, a button cover and a base. A concave cavity is provided on the base, a reed is provided in the concave cavity, one end of the button is provided in the accommodating cavity of the button cover, and the other end of the button passes through the button cover, so that the button and the button cover slide and cooperate. When the upper part of the button is pressed, the button slides in the button cover, pressing the arched surface in the middle of the reed to sink, and when the button is released, the reed returns under the action of elastic force, and the button bounces up, thereby realizing the switching of the circuit. However, the existing key switch does not limit the stroke of the button. When the button is pressed too hard or the key switch falls to the ground during transportation, the button is easily over-pressed, so that the reed cannot return, thereby affecting the service life of the product. At the same time, due to the sensitivity of the touch switch itself, it is very easy to cause accidental touches during actual use, affecting the use effect. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a pressure-proof touch switch with a long service life and good use effect.

[0004] The utility model solves the technical problem by adopting a technical solution, which is a pressure-proof light touch switch, comprising a base, an overload sheet, an upper base, and a switch push handle, wherein a center contact and side contacts on both sides of the center contact are arranged in a cavity of the base, the overload sheet arches upward and contacts and cooperates with the side contacts on both sides, the upper base is fastened to the base, one end of the switch push handle passes through the upper base, and the other end of the switch push handle cooperates with the accommodating cavity of the upper base, and the switch push handle can move a certain distance along its own axial direction so that the overload sheet can be pressed against the upper base. The carrier sheet triggers the center contact, and a push handle portion is formed at the bottom of one end of the switch push handle in the accommodating cavity. A first limiting rib is evenly distributed on the upper circumferential wall surface of the push handle portion, and the outer contour of the first limiting rib is larger than the diameter of the cavity. An elastic waterproof membrane and an inner pressing piece are sequentially arranged between the push handle portion and the overload sheet, and the elastic waterproof membrane is bonded to the upper surface of the base to seal the opening of the cavity. The inner pressing piece is set as an assembly structure and an elastic buffer is provided at the assembly position. The elastic waterproof membrane and the inner pressing piece form a buffer for the push handle portion.

[0005] The advantages of adopting the above technical solution are as follows: by arranging a push handle portion at the bottom of the switch push handle, and arranging a first limiting rib on the upper peripheral wall surface of the push handle portion, since the outer contour of the first limiting rib is larger than the diameter of the cavity on the base, when the switch push handle is pressed to a certain extent, the arched middle part of the overload piece forms a stable contact with the center contact, and the bottom of the first limiting rib will be against the surface of the base, while achieving the purpose of circuit switching, preventing the overload piece from being excessively squeezed, protecting the shape and function of the overload piece from damage under the action of external force, thereby greatly extending the service life of the product, and at the same time, by arranging an elastic waterproof membrane to seal the opening of the cavity, external water vapor is prevented from entering the cavity from the connection between the base and the upper seat. The inner pressing part is assembled, and an elastic buffer is arranged at the assembly position. If the switch push handle is accidentally touched in the non-working state, the elastic force of the elastic waterproof membrane and the elastic buffer needs to be overcome, thereby playing a certain buffering role and effectively avoiding being triggered by mistake in the non-working state. Therefore, the overall structure of this product is reasonable, the overload plate is not easy to be damaged, the product has a long service life, the product has a good use effect, and it also has a good waterproof effect.

[0006] Furthermore, the inner pressing member includes a bearing seat and a pressure seat, the bearing seat is slidably matched with the cavity, the bottom and top of the bearing seat are respectively provided with a first protrusion and a second protrusion, the first protrusion is abutted against the center of the overload plate, and the pressure seat is movably connected to the second protrusion so as to move along its own axial direction under the action of the elastic buffer and the push handle.

[0007] The advantages of adopting the above technical solution are: through the setting of the first convex part, the bearing seat can reasonably overcome the elastic force of the overload plate to cause it to deform, and through the setting of the second convex part, the force movement of the pressure seat is more stable. Therefore, the internal pressing member assembled by the bearing seat and the pressure seat has the characteristics of reasonable action, smooth movement and stable buffering, and the matching structure is simple, effective and reasonable.

[0008] Furthermore, the accommodating cavity includes a large diameter section and a small diameter section, the large diameter section is arranged relative to the push handle portion, the small diameter section is arranged to be penetrating, and a limiting groove is evenly provided at the root of the inner wall surface of the small diameter section, and the limiting groove is extended axially, and a second limiting rib is evenly provided on the peripheral wall surface of the switch push handle, and the second limiting rib corresponds to the limiting groove.

[0009] Advantages of the above technical solution: the accommodating cavity is composed of a large diameter section and a small diameter section, so that the switch push handle will not fall off the upper seat after installation. The limit groove and the second limit rib are provided to limit the rotation of the switch push handle, which can prevent the suction cup from shifting the angle of the switch base when grabbing the touch switch, ensuring that the pins on the touch switch are accurately inserted into the PCB, and can also prevent dust or foreign matter from entering with the rotation to a certain extent, so that the touch switch is safe to use.

[0010] Furthermore, the switch push handle forms a limiting ring at the connection between the first limiting rib and the second limiting rib, the outer contour of the limiting ring is consistent with the outer contour of the first limiting rib, and the limiting ring is also provided with an elastic dustproof film for sealing.

[0011] Advantages of the above technical solution: The setting of the limit ring makes the sliding fit between the switch push handle and the accommodating cavity more stable. At the same time, an elastic dust-proof film for sealing is provided on the limit ring. The elastic dust-proof film can effectively seal the fitting gap between the switch push handle and the accommodating cavity, thereby preventing the entry of dust or foreign matter, and the use of the touch switch is also safer.

[0012] Furthermore, support bosses are provided at the four corners of the upper surface of the base, riveted columns are provided on the support bosses, and riveted holes matching the corresponding riveted columns are provided on the upper seat, and the upper seat is fixedly connected to the base by riveting.

[0013] The advantages of adopting the above technical solution are as follows: the base and the upper seat are riveted and fixed by the riveting column and the riveting hole, which is not easy to loosen or disassemble. By setting the supporting boss, the supporting boss can form a reliable support for the upper seat, so that the connection stability of the base and the upper seat is higher, and the structure is reasonably set.

[0014] Furthermore, the supporting boss cooperates with the upper surface of the base to form a sealed cavity, the elastic waterproof membrane is adapted in the sealed cavity, and a high temperature resistant waterproof tape is provided between the sealed cavity and the elastic waterproof membrane.

[0015] The advantages of adopting the above technical solution are as follows: the supporting boss can effectively limit the position of the elastic waterproof membrane while providing reliable support for the upper seat, so that the position of the elastic waterproof membrane relative to the cavity is not easy to change, and by arranging a high-temperature resistant waterproof tape on the surface of the sealing cavity, the waterproof effect of the elastic waterproof membrane is better and the structural design is reasonable.

[0016] Furthermore, the bottom of the upper seat is also provided with a pressing convex rib surrounding the accommodating cavity, and the pressing convex rib presses on the elastic waterproof membrane.

[0017] The advantages of adopting the above technical solution are as follows: after the upper seat is fixedly connected to the base, the pressing ribs will firmly press the elastic waterproof membrane, which will improve the sealing stability while the elastic buffering force generated by the elastic waterproof membrane under the action of the push handle of the switch push handle will be stronger, thereby making the buffering effect better.

[0018] Furthermore, the overload plate is made of stainless steel, and a silver-plated layer is provided on the surface of the overload plate.

[0019] The advantages of adopting the above technical solution are as follows: the overload sheet has better conductivity and better rigidity, the touch switch is less likely to be falsely triggered, and is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the overall structure of the utility model;

[0021] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0022] Figure 3 for Figure 1 A magnified view of part B in FIG.

[0023] Figure 4 It is a partial structural schematic diagram of the utility model;

[0024] Figure 5 This is a schematic diagram of the switch push handle structure of the utility model;

[0025] Figure 6 This is a cross-sectional view of the upper seat structure of the utility model;

[0026] Figure 7 It is a partial structural sectional view of the utility model;

[0027] Figure 8 It is a schematic diagram of the base structure of the utility model.

[0028] In the figure: 1-base, 2-overload plate, 3-upper seat, 4-switch push handle, 5-cavity, 6-center contact, 7-side contact, 8-accommodating cavity, 9-push handle, 10-first limiting rib, 11-elastic waterproof membrane, 12-inner press piece, 13-elastic buffer, 14-bearing seat, 15-pressure seat, 16-first convex portion, 17-second convex portion, 18-large diameter section, 19-small diameter section, 20-limiting groove, 21-second limiting rib, 22-limiting ring, 23-elastic dustproof membrane, 24-support boss, 25-riveted column, 26-riveted hole, 27-sealing cavity, 28-high temperature resistant waterproof tape, 29-pressure convex rib. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the utility model and / or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0030] See also Figures 1 to 8 As shown, a pressure-proof touch switch includes a base 1, an overload sheet 2, an upper base 3, and a switch push handle 4. A center contact 6 and side contacts 7 on both sides of the center contact 6 are provided in a cavity 5 of the base 1. The overload sheet 2 is arched upward and contacts and cooperates with the side contacts 7 on both sides. The upper base 3 is tightly connected to the base 1. One end of the switch push handle 4 passes through the upper base 3, and the other end of the switch push handle 4 cooperates with the accommodating cavity 8 of the upper base 3. The switch push handle 4 can move a certain distance along its own axial direction so that the overload sheet 2 triggers the center contact 6, thereby achieving the purpose of switching the circuit.

[0031] In this embodiment, a handle portion 9 with a smaller diameter is formed at the bottom of one end of the switch push handle 4 in the accommodating cavity 8, and the handle portion 9 is directly opposite to the arched center of the overload piece 2. In this way, the switch push handle 4 can have a better effect on the overload piece 2 after being pressed and moved. A uniformly distributed first limiting rib 10 is provided on the upper peripheral wall surface of the push handle portion 9. The first limiting rib can be distributed in a cross shape or a Y shape. The outer contour of the first limiting rib 10 is larger than the diameter of the cavity 5. By arranging the first limiting rib 10 on the upper peripheral wall surface of the push handle portion 9, since the outer contour of the first limiting rib 10 is larger than the diameter of the cavity 5 on the base 1, when the switch push handle 4 is pressed to a certain extent, the arched middle part of the overload piece 2 forms a stable contact with the center contact 6, and the bottom of the first limiting rib 10 will be against the surface of the base 1, so as to achieve the purpose of circuit switching and prevent the overload piece 2 from being excessively squeezed, and protect the shape and function of the overload piece 2 from being damaged under the action of external force, thereby greatly extending the service life of the product.

[0032] In this embodiment, an elastic waterproof membrane 11 and an inner pressing member 12 are sequentially provided between the push handle 9 and the overload sheet 2. The elastic waterproof membrane 11 is bonded to the upper surface of the base 1 to seal the opening of the cavity 5. The inner pressing member 12 is set as an assembly structure and an elastic buffer member 13 is provided at the assembly position. The elastic waterproof membrane 11 and the inner pressing member 12 form a buffer for the push handle 9. By providing the elastic waterproof membrane 11 that seals the opening of the cavity 5, external water vapor is prevented from entering the cavity 5 from the connection between the base 1 and the upper seat 3, thereby ensuring the safety of the electrical connection between the center contact 6 and the side contact 7 in the cavity 5 and the overload sheet 2. By providing the inner pressing member 12, the distance that the switch push handle 4 moves along its own axial direction is reduced, so that the push handle part 9 will not cause the elastic waterproof membrane 11 to rupture, and the inner pressing part 12 is assembled, and an elastic buffer 13 is arranged at the assembly position. If the switch push handle 4 is accidentally touched in the non-working state, the elastic force of the elastic waterproof membrane 11 and the elastic buffer 13 must be overcome, thereby playing a certain buffering role and effectively avoiding being accidentally triggered in the non-working state. Therefore, the overall structure of this product is reasonable, the overload sheet 2 is not easy to be damaged, the product has a long service life, the product has a good use effect, and it also has a better waterproof effect.

[0033] In this embodiment, the inner pressing member 12 includes a bearing seat 14 and a pressure seat 15. The bearing seat 14 is slidably matched with the cavity 5. A first convex portion 16 and a second convex portion 17 are respectively provided at the bottom and top of the bearing seat 14. The first convex portion 16 is in contact with the center of the overload sheet 2. The pressure seat 15 is movably connected to the second convex portion 17 to move along its own axial direction under the action of the elastic buffer 13 and the push handle portion 9. Through the setting of the first convex portion 16, the bearing seat 14 can reasonably overcome the elastic force of the overload sheet 2 to cause it to deform. Through the setting of the second convex portion 17, the pressure seat 15 can be flexibly connected to the second convex portion 17. The pressure seat 15 is in a sleeved manner and cooperates with the second protrusion 17, so that the force movement of the pressure seat 15 is more stable. The elastic buffer 13 can be a flexible sleeve sleeved on the second protrusion 17 or a spring connected to the corresponding position on the upper surface of the bearing seat 14. The pressure seat 15 is supported by the elastic buffer 13. In this way, when the pressure seat 15 is installed, it can move elastically under the action of the push handle 9. Therefore, the inner pressing member 12 assembled by the bearing seat 14 and the pressure seat 15 has the characteristics of reasonable action, smooth movement, and stable buffering, and the matching structure is simple, effective and reasonable.

[0034] In this embodiment, the accommodating cavity 8 includes a large diameter section 18 and a small diameter section 19, the large diameter section 18 is arranged relative to the push handle portion 9, the large diameter section 18 and the first limiting rib 10 are clearance-matched, and the small diameter section 19 is arranged through, that is, the first limiting rib 10 will form a limit with the accommodating cavity 8, so that the switch push handle 4 will not fall out of the upper seat 3 after installation. More specifically, a limiting groove 20 is evenly provided at the root of the inner wall surface of the small diameter section 19, and the limiting groove 20 is evenly extended along the axial direction. A second limiting rib 21 is provided, and the second limiting rib 21 is distributed in a straight line. The second limiting rib 21 corresponds to the limiting groove 20, that is, the second limiting rib 21 on the switch push handle 4 after being installed in place will be inserted into the limiting groove 20. This arrangement can limit the rotation of the switch push handle 4, and can prevent the suction cup from shifting the angle of the switch base when grabbing the touch switch, thereby ensuring that the pins on the touch switch are accurately inserted into the PCB. When in use, it can also prevent dust or foreign matter from entering with the rotation to a certain extent, and the touch switch is safe to use.

[0035] In this embodiment, a limiting ring 22 is formed at the connection between the first limiting rib 10 and the second limiting rib 21 on the switch push handle 4. The outer contour of the limiting ring 22 is consistent with the outer contour of the first limiting rib 10. An elastic dustproof membrane 23 for sealing is also provided on the limiting ring 22. The setting of the limiting ring 22 makes the sliding fit between the switch push handle 4 and the accommodating cavity 8 more stable. At the same time, an elastic dustproof membrane 23 for sealing is provided on the limiting ring 22. The elastic dustproof membrane 23 can effectively seal the fitting gap between the switch push handle 4 and the accommodating cavity 8. That is to say, the inner circumferential wall surface of the elastic dustproof membrane 23 is tightly matched with the circumferential wall surface of the switch push handle 4, and the outer circumferential wall surface of the elastic dustproof membrane 23 is tightly matched with the inner wall surface of the large diameter section 18, thereby preventing the entry of dust or foreign matter, and the use of the touch switch is also safer.

[0036] In this embodiment, support bosses 24 are provided at the four corners of the upper surface of the base 1, and rivet columns 25 are provided on the support bosses 24. Riveted holes 26 matching the corresponding riveted columns 25 are provided on the upper seat 3. The upper seat 3 is fixedly connected to the base 1 by riveting. The base 1 and the upper seat 3 are riveted and fixed by the rivet columns 25 and the rivet holes 26, which are not easy to loosen or disassemble. By setting the support bosses 24, the support bosses 24 will form a reliable support for the upper seat 3, so that the connection stability between the base 1 and the upper seat 3 is higher, and the structural setting is reasonable.

[0037] In this embodiment, the support boss 24 cooperates with the upper surface of the base 1 to form a sealing cavity 27, and the elastic waterproof membrane 11 is adapted to the sealing cavity 27. More specifically, the inner side surface of the support boss 23 is set to an arc surface so that the shape of the sealing cavity 27 is circular, that is, the shape of the elastic waterproof membrane 11 is also circular, and a high-temperature resistant waterproof tape 28 is also provided between the sealing cavity 27 and the elastic waterproof membrane 11. With the above-mentioned structure, the support boss 24 can effectively limit the position of the elastic waterproof membrane 11 while forming a reliable support for the upper seat 3, so that the position of the elastic waterproof membrane 11 relative to the cavity 5 is not easy to change, and by arranging the high-temperature resistant waterproof tape 28 on the surface of the sealing cavity 27, the waterproof effect of the elastic waterproof membrane 11 is better, and the structural design is reasonable.

[0038] In this embodiment, the bottom of the upper seat 3 is also provided with a pressing rib 29 surrounding the accommodating cavity 8, and the pressing rib 20 presses on the elastic waterproof membrane 11. After the upper seat 3 is fixedly connected to the base 1, the pressing rib 29 will firmly press the elastic waterproof membrane 11. While improving the sealing stability, the elastic buffering force generated by the elastic waterproof membrane 11 under the action of the push handle part 9 of the switch push handle 4 will also be stronger, so that the buffering effect will also be better.

[0039] In this embodiment, the overload plate 2 is made of stainless steel, and a silver-plated layer is provided on the surface of the overload plate 2. This arrangement enables the overload plate 2 to have better conductivity and better rigidity, making the touch switch less prone to false triggering and safer to use.

[0040] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A pressure-proof light touch switch, comprising a base (1), an overload sheet (2), an upper base (3), and a switch push handle (4); a center contact (6) and side contacts (7) located on both sides of the center contact (6) are provided in a cavity (5) of the base (1); the overload sheet (2) is arched upward and contacts and cooperates with the side contacts (7) on both sides; the upper base (3) is tightly connected to the base (1); one end of the switch push handle (4) passes through the outside of the upper base (3); the other end of the switch push handle (4) is cooperated in the accommodating cavity (8) of the upper base (3); the switch push handle (4) can move a certain distance along its own axial direction so that the overload sheet (2) triggers the center contact (6); the characteristics are: The switch push handle (4) is provided with a push handle portion (9) at the bottom of one end in the accommodating cavity (8); a first limiting rib (10) is evenly distributed on the upper peripheral wall surface of the push handle portion (9); the outer contour of the first limiting rib (10) is larger than the diameter of the cavity (5); an elastic waterproof membrane (11) and an inner pressing member (12) are provided in sequence between the push handle portion (9) and the overload plate (2); the elastic waterproof membrane (11) is bonded to the upper surface of the base (1) to seal the opening of the cavity (5); the inner pressing member (12) is provided as an assembled structure and an elastic buffer member (13) is provided at the assembled position; the elastic waterproof membrane (11) and the inner pressing member (12) form a buffer for the push handle portion (9).

2. The pressure-proof touch switch according to claim 1, characterized in that: The inner pressing member (12) comprises a bearing seat (14) and a pressure seat (15), wherein the bearing seat (14) is slidably matched with the cavity (5), and the bottom and top of the bearing seat (14) are respectively provided with a first protrusion (16) and a second protrusion (17), wherein the first protrusion (16) is in abutment with the center of the overload plate (2), and the pressure seat (15) is movably connected to the second protrusion (17) so as to move along its own axial direction under the action of the elastic buffer (13) and the push handle (9).

3. The pressure-proof touch switch according to claim 1, characterized in that: The accommodating cavity (8) comprises a large diameter section (18) and a small diameter section (19); the large diameter section (18) is arranged relative to the push handle (9); the small diameter section (19) is arranged to penetrate the small diameter section (19); and a limiting groove (20) is evenly arranged at the root of the inner wall surface of the small diameter section (19); the limiting groove (20) is extended in the axial direction; and second limiting ribs (21) are evenly arranged on the peripheral wall surface of the switch push handle (4); the second limiting ribs (21) are correspondingly matched with the limiting groove (20).

4. The pressure-proof touch switch according to claim 3, characterized in that: The switch push handle (4) forms a limiting ring (22) at the connection between the first limiting rib (10) and the second limiting rib (21); the outer contour of the limiting ring (22) is consistent with the outer contour of the first limiting rib (10); and the limiting ring (22) is also provided with an elastic dustproof film (23) for sealing.

5. The pressure-proof touch switch according to claim 1, characterized in that: Support bosses (24) are also provided at the four corners of the upper surface of the base (1), and riveted columns (25) are provided on the support bosses (24). Riveted holes (26) matching the corresponding riveted columns (25) are provided on the upper seat (3), and the upper seat (3) and the base (1) are fixedly connected by riveting.

6. The pressure-proof touch switch according to claim 5, characterized in that: The supporting boss (24) cooperates with the upper surface of the base (1) to form a sealing cavity (27), the elastic waterproof membrane (11) is adapted to fit within the sealing cavity (27), and a high temperature resistant waterproof tape (28) is provided between the sealing cavity (27) and the elastic waterproof membrane (11).

7. The pressure-proof touch switch according to claim 1, characterized in that: The bottom of the upper seat (3) is also provided with a pressing convex rib (29) surrounding the accommodating cavity (8), and the pressing convex rib (29) presses against the elastic waterproof membrane (11).

8. The pressure-proof touch switch according to claim 1, characterized in that: The overload plate (2) is made of stainless steel, and a silver-plated layer is provided on the surface of the overload plate (2).

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