CN214505316U

CN214505316U - Large-key touch switch

Info

Publication number: CN214505316U
Application number: CN202120838117.2U
Authority: CN
Inventors: 戴加强; 何春林; 张鹏
Original assignee: Wenzhou Hanjing Electronics Co ltd
Current assignee: Wenzhou Hanjing Electronics Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-10-26
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses a big button dabs switch, including apron, button, shell fragment, terminal and base, the base is inside to have a cavity that holds shell fragment and terminal, and the button sets up in the cavity through the through-hole some that the apron upper surface was seted up, the bottom integrated into one piece of button has seal gasket, and the seal gasket centre gripping is between the lower surface of apron and the up end of base, both sides all are equipped with first turn-ups around the apron, two be connected through the buckle between the wall of both sides around first turn-ups and the base, the left and right sides of apron all is equipped with the second turn-ups, and the second turn-ups covers seal gasket and the seam between the base. The utility model discloses a button bottom has seal gasket, possess good waterproof function, and the apron is inseparable with being connected between the base, has further strengthened seal gasket's waterproof, dirt-proof effect, has guaranteed the function of dabbing the switch, increase of service life.

Description

Large-key touch switch

Technical Field

The utility model relates to a dab the switch, especially relate to a big button dabs switch.

Background

The tact switch has advantages of small contact resistance load, accurate operation force error, diversified specifications, and the like, and is widely applied to electronic equipment, white appliances, and the like. The touch switch with the traditional structure mainly comprises a base, a button and a cover plate, wherein the cover plate is provided with a through hole, the button is matched with the through hole, and the internal structure of the touch switch is opened and closed by the elastic sheet which is elastically moved by the stress of the elastic sheet. The through-hole in the middle of the apron mainly used leads the positive button, because the button need smoothly move about, just there is obvious clearance between the through-hole in the middle of the apron and the button, causes the switch function subassembly not have airtight die cavity, leads to the product in the use with aqueous vapor or the contact of micronic dust in the air, probably became invalid at any time, can not play waterproof, dirt-proof effect to the life and the security of product can not obtain effectual guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the problem that above-mentioned prior art exists, provide a big button dabs switch, the leakproofness is better, and the life-span is longer, and the saving product occupies the PCB board space.

The utility model provides a technical scheme that its technical problem adopted: a large-key light-touch switch comprises a cover plate, a button, an elastic sheet, terminals and a base, wherein a cavity for accommodating the elastic sheet and the terminals is formed in the base, the button is arranged in the cavity through a part of a through hole formed in the upper surface of the cover plate, a sealing gasket is integrally formed at the bottom end of the button and clamped between the lower surface of the cover plate and the upper end surface of the base, first flanges are arranged on the front side and the rear side of the cover plate, the two first flanges are connected with the front side wall and the rear side wall of the base through buckles, second flanges are arranged on the left side and the right side of the cover plate, the second flanges cover the seams between the sealing gasket and the base, the terminals are embedded in the base, one end of each terminal is exposed in the cavity, the other end of each terminal is exposed on the left side wall and the right side wall of the base, each terminal comprises a side terminal and a center terminal, the inner end of the center terminal is positioned under the button, the inner of side terminal is located the inner both sides of center terminal, the bottom of cavity is equipped with annular blocking groove between center terminal and side terminal, the shell fragment is circular hunch piece, and the bottom edge and the side terminal contact of shell fragment have the clearance between the center of shell fragment and the center terminal, can bulldoze when the button moves down the shell fragment contacts after warping downwards center terminal.

In order to further improve the structure, a female buckle is arranged at the upper part of the first flanging, male buckles matched with the female buckle are arranged at the upper parts of the front side wall and the rear side wall of the base, a buckling edge capable of being folded inwards is arranged at the lower part of the first flanging, and fixing grooves matched with the buckling edge are arranged at the lower parts of the front side wall and the rear side wall of the base.

Further perfection, the upper part height of the second flanging is greater than the thickness of the sealing gasket, the lower part of the second flanging is provided with a T-shaped buckle hook, and the left side wall and the right side wall of the base are correspondingly provided with a positioning buckle groove matched with the T-shaped buckle hook in shape.

Further perfection, the inner of the central terminal is of an annular structure, and a plurality of convex contacts are circumferentially distributed on the upper side of the inner end of the central terminal.

Further perfection, the circumference distributes on the inner wall of cavity has the arc step piece that is used for the location shell fragment, has the constant head tank between the adjacent arc step piece, seal gasket's bottom surface is equipped with the sealed boss of annular with the up end complex of arc step piece, and the circumference distributes on the sealed boss of annular has the location lug with constant head tank complex.

Further perfection, the cover plate is made of a stainless steel sheet with the thickness of 0.15mm, the button and the sealing gasket are made of silica gel materials, the elastic sheet is made of stainless steel covered with silver, and the terminal is made of a brass sheet with the thickness of 0.3mm through silver plating.

The utility model discloses profitable effect is: the utility model discloses a bottom integrated into one piece of button has seal gasket, and seal gasket centre gripping has good waterproof function between the upper end face of the lower surface of apron and base, both sides all are equipped with first turn-ups around the apron, two connect through the buckle between the first turn-ups and the front and back both sides wall of base, the both sides of apron all are equipped with the second turn-ups, and the second turn-ups covers seal gasket's and the seam between the base, makes the connection between apron and the base tighter, has strengthened seal gasket's waterproof, dustproof effect, and the bottom of cavity is equipped with annular blocking groove between center terminal and side terminal in the base, even when steam gets into the light touch switch inside, blocking groove will cut off silver ion's movement route, prevents silver ion migration to and migrate between center terminal and side terminal, has improved waterproof function, the short circuit phenomenon between the central terminal and the side terminal is prevented, the function of the tact switch is guaranteed, the service life is prolonged, the tact switch is simple in structure, high in sensitivity and strong in corrosion resistance, and the tact switch is suitable for a humid working environment.

Drawings

FIG. 1 is a schematic structural diagram of this embodiment 1;

FIG. 2 is an exploded view of the present example 1;

FIG. 3 is a schematic view of the bottom surface of the gasket seal;

FIG. 4 is a schematic structural diagram of the present embodiment 2;

description of reference numerals: 1. the cover plate, 11, first turn-ups, 111, box, 112, detain the limit, 12, the second turn-ups, 121, T shape is detained and is colluded, 2, the button, 3, the shell fragment, 4, the base, 41, the annular blocks the groove, 42, the pin, 43, the fixed slot, 44, the location catching groove, 45, arc-shaped step piece, 46, the constant head tank, 5, the terminal, 51, the side terminal, 52, central terminal, 521, the convex contact, 6, seal gasket, 61, annular seal boss, 62, the location lug.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

referring to figures 1-2: in this embodiment 1, a large-key touch switch includes a cover plate 1, a button 2, an elastic sheet 3, a terminal 5, and a base 4, wherein the base 4 has a cavity for accommodating the elastic sheet 3 and the terminal 5, the button 2 is disposed in the cavity through a part of a through hole formed on an upper surface of the cover plate 1, a sealing gasket 6 is integrally formed at a bottom end of the button 2, the sealing gasket 6 is clamped between a lower surface of the cover plate 1 and an upper end surface of the base 4, and has a good waterproof function, first flanges 11 are disposed on front and rear sides of the cover plate 1, the two first flanges 11 are connected with front and rear side walls of the base 4 through fasteners, so that the cover plate is connected with the base more tightly, and the waterproof and dustproof effects of the sealing gasket are enhanced, second flanges 12 are disposed on left and right sides of the cover plate 1, and the second flanges 12 cover a seam between the sealing gasket 6 and the base 4, the gasket seal structure can prevent the edge of the gasket seal 6 from being aged due to excessive exposure, the service life of the gasket seal structure is prolonged, the terminal 5 is embedded in the base 4, one end of the terminal is exposed in the cavity, the other end of the terminal is exposed on the left side wall and the right side wall of the base 4, the terminal 5 comprises a side terminal 51 and a center terminal 52, the inner end of the center terminal 52 is positioned under the button 2, the inner end of the side terminal 51 is positioned on two sides of the inner end of the center terminal 52, an annular blocking groove 41 is formed in the bottom of the cavity between the center terminal 52 and the side terminal 51, the elastic sheet 3 is a circular arch sheet, the bottom edge of the elastic sheet 3 is in contact with the side terminal 51, a gap is formed between the center of the elastic sheet 3 and the center terminal 52, and when the button 2 moves downwards, the elastic sheet 3 can be pushed and pressed to deform downwards to contact with the center terminal 52, so that a circuit is connected.

The upper portion of the first turned-over edge 11 is provided with a female buckle 111, the upper portions of the front and rear side walls of the base 4 are provided with male buckles 42 matched with the female buckles 111, the lower portion of the first turned-over edge 11 is provided with a buckling edge 112 capable of being folded inwards, and the lower portions of the front and rear side walls of the base 4 are provided with fixing grooves 43 matched with the buckling edge 112. Through the fixing structure, the front and the rear parts of the base 4 and the cover plate 1 are firmly connected, and the sealing performance is good.

As shown in fig. 4, example 2: on the basis of embodiment 1, the height of the upper portion of the second flange 12 is greater than the thickness of the sealing gasket 6, the lower portion of the second flange 12 is provided with a T-shaped buckle hook 121, and the left and right side walls of the base 4 are correspondingly provided with a positioning buckle slot 44 adapted to the T-shaped buckle hook 121. Through above-mentioned structure, the both sides and base 4 further realize more firm fixed about apron 1, and the clamping pressure to seal gasket 6 can be more lasting, has more lasting waterproof life-span of sealing.

The inner end of the central terminal 52 is of an annular structure, a plurality of convex contacts 521 are circumferentially distributed on the upper side of the inner end of the central terminal 52, contact points with the elastic sheet are more, and the electric contact performance of the switch is good.

As shown in fig. 2 and 3, arc-shaped step blocks 45 for positioning the spring plate 3 are circumferentially distributed on the inner wall of the cavity, positioning grooves 46 are formed between adjacent arc-shaped step blocks 45, an annular sealing boss 61 matched with the upper end face of the arc-shaped step block 45 is arranged on the bottom surface of the sealing gasket 6, and positioning convex blocks 62 matched with the positioning grooves 46 are circumferentially distributed on the annular sealing boss 61. Through above-mentioned structure, seal gasket 6 is compacter with being connected of the cavity oral area of base, the improvement waterproof performance that is showing can block inside steam gets into the light switch that touches.

The cover plate 1 is made of a stainless steel sheet with the thickness of 0.15mm and has good strength and corrosion resistance, the button 2 and the sealing gasket 6 are made of silica gel materials and are high in elasticity and good in sealing performance, the elastic sheet 3 is made of stainless steel coated with silver and is long in service life and good in conductivity, and the terminal 5 is made of a brass sheet with the thickness of 0.3mm and is plated with silver, so that the terminal has good conductivity.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides a big button dabs switch, includes apron (1), button (2), shell fragment (3), terminal (5) and base (4), and base (4) inside has a cavity that holds shell fragment (3) and terminal (5), and button (2) are partly set up in the cavity through the through-hole that apron (1) upper surface was seted up, characterized by: the bottom end of the button (2) is integrally formed with a sealing gasket (6), the sealing gasket (6) is clamped between the lower surface of the cover plate (1) and the upper end face of the base (4), the front side and the rear side of the cover plate (1) are respectively provided with a first flanging (11), the two first flanging (11) are connected with the front side wall and the rear side wall of the base (4) through buckles, the left side and the right side of the cover plate (1) are respectively provided with a second flanging (12), the second flanging (12) covers the joint between the sealing gasket (6) and the base (4), the terminal (5) is embedded into the base (4), one end of the terminal is exposed in the cavity, the other end of the terminal is exposed on the left side wall and the right side wall of the base (4), the terminal (5) comprises a side terminal (51) and a center terminal (52), the inner end of the center terminal (52) is positioned under the button (2), the inner of side terminal (51) is located the inner both sides of center terminal (52), the bottom of cavity is equipped with annular blocking groove (41) between center terminal (52) and side terminal (51), shell fragment (3) are circular hunch piece, the bottom edge and the side terminal (51) contact of shell fragment (3), have the clearance between the center of shell fragment (3) and center terminal (52), work as can bulldoze when button (2) moves down shell fragment (3) contact after the downward deformation center terminal (52).

2. The large-button tact switch according to claim 1, wherein: the upper portion of first turn-ups (11) is equipped with box (111), and the both sides wall upper portion in front and back of base (4) is equipped with box (111) complex pin thread (42), the lower part of first turn-ups (11) is equipped with knot limit (112) that can the infolding, and the both sides wall lower part in front and back of base (4) is equipped with and detains limit (112) complex fixed slot (43).

3. The large-button tact switch according to claim 2, wherein: the upper part of the second flanging (12) is higher than the thickness of the sealing gasket (6), the lower part of the second flanging (12) is provided with a T-shaped buckle hook (121), and the left side wall and the right side wall of the base (4) are correspondingly provided with a positioning buckle groove (44) matched with the T-shaped buckle hook (121) in shape.

4. The large-button tact switch according to claim 3, wherein: the inner end of the central terminal (52) is of an annular structure, and a plurality of convex contacts (521) are circumferentially distributed on the upper side of the inner end of the central terminal (52).

5. The large-button tact switch according to claim 4, wherein: arc-shaped step blocks (45) used for positioning the elastic sheet (3) are circumferentially distributed on the inner wall of the cavity, positioning grooves (46) are formed between every two adjacent arc-shaped step blocks (45), an annular sealing boss (61) matched with the upper end face of each arc-shaped step block (45) is arranged on the bottom face of each sealing gasket (6), and positioning convex blocks (62) matched with the positioning grooves (46) are circumferentially distributed on each annular sealing boss (61).

6. The large-button tact switch according to claim 5, wherein: the cover plate (1) is made of a stainless steel sheet with the thickness of 0.15mm, the button (2) and the sealing gasket (6) are made of silica gel, the elastic sheet (3) is made of stainless steel covered with silver, and the terminal (5) is made of a brass sheet with the thickness of 0.3mm through silver plating.