Touch switch with protection function

Abstract

The utility model discloses a touch switch with a protection function, which structurally comprises a base, a cover plate, a button and a housing, the button is movably mounted in the base, the upper end of the button penetrates and extends out of the cover plate, the bottom of the housing is opened and is provided with a cavity matched with the base, and the top of the housing is provided with a pressing sheath. Through holes are formed in the centers of the front side and the rear side of the base, clamping blocks are arranged in the through holes in a telescopic mode, clamping holes matched with the clamping blocks are formed in the front side and the rear side of the cover shell, the clamping blocks are made to retract into the through holes when the cover shell is installed, and after the cover shell reaches a preset installation position, the clamping blocks pop out and form limiting clamping with the clamping holes, so that clamping of the cover shell is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, and more specifically to a light touch switch with a protective function. Background Art

[0002] A touch switch is an electronic switch, also called a push button switch. When in use, you can turn the switch on by lightly pressing the switch. When you release your hand, the switch is disconnected. Its internal structure relies on the metal spring (moving contact piece) to bounce under force to achieve on and off. The touch switch has the advantages of small contact resistance, precise operating force error, and diversified specifications. It is widely used in electronic equipment and white appliances.

[0003] The touch switches currently available on the market, for example, a touch switch disclosed in a Chinese patent with a publication (announcement) number of CN216119989U, include a disc-shaped metal spring and a switch body. The disc-shaped metal spring is arranged on the switch body, and has an arched portion and a flat plate portion arranged around the bottom edge of the arched portion; the switch body has a first static contact arranged opposite to the arched portion, two second static contacts symmetrically distributed along the first center line of the disc-shaped metal spring and abutting against the bottom surface of the flat plate portion, and two steps symmetrically distributed along the second center line of the disc-shaped metal spring and abutting against the bottom surface of the flat plate portion; there is a matching gap between the button and the cover plate of the above-mentioned touch switch, and water, dust and oil dirt contacted by the touch switch during use can easily penetrate into the switch through the above-mentioned matching gap and then corrode the contacts and reed in the switch, causing the switch to have poor contact or even short circuit, resulting in the related electrical appliances and instruments and equipment being unable to be used normally. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a touch switch with a protective function to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a touch switch with a protective function, comprising a base, a cover plate, a button and a cover shell, the button is movably installed in the base and the upper end extends through the outside of the cover plate, the bottom of the cover shell is open and has a chamber adapted to the base, the top of the cover shell has a pressing sleeve, through holes are opened at the center of the front and rear sides of the base and a card block is telescopically arranged in the through hole, and card holes adapted to the card block are opened on the front and rear sides of the cover shell. When the cover shell is installed, the card block is caused to retract into the through hole. After the cover shell reaches a predetermined installation position, the card block pops out and forms a limit clamping with the card hole to achieve the clamping of the cover shell.

[0006] The utility model is further configured as follows: a guide sleeve is fixedly installed in the through hole, a guide hole is formed at the center of the guide sleeve, two limit grooves are correspondingly provided at the open end of the guide hole, the clamping block is adapted to the size of the guide hole and a limit block adapted to the two limit grooves is provided on the outside of the clamping block, the outer end of the clamping block extends outside the base and is provided with an oblique waist.

[0007] The utility model is further configured as follows: at least two assembly seats are arranged on the inner wall of the base corresponding to the clamping holes, and spring pieces adapted to the clamping blocks are fixed on the two assembly seats.

[0008] The utility model is further configured as follows: the spring piece comprises an assembly part connected to the assembly seat, an outer end of the assembly part extends to have a bending part bent toward one side of the clamping block, and an outer end of the bending part abuts against an inner end of the clamping block.

[0009] The utility model is further configured as follows: a fixing seat is fixedly arranged at the opening end of the cover shell outside the clamping hole, a movable hole is opened in the middle of the fixing seat and a pressing block is slidably arranged in the movable hole, and the outer end of the pressing block extends outside the fixing seat and has a pressing portion extending therefrom.

[0010] The utility model is further configured as follows: two guide grooves are correspondingly arranged at the inner opening end of the fixing seat, and a guide block adapted to the two guide grooves is arranged at the outer side of the pressing block.

[0011] The utility model is further configured as follows: connection pins are arranged in dialogue with the left and right sides of the base.

[0012] In summary, the utility model has the following beneficial effects: the push-on cover on the top of the cover can completely cover the fitting gap between the button and the base, preventing water, dust and oil from the outside of the touch switch from penetrating into the inside of the switch, achieving good protective effect and increasing the service life of the touch switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the disassembly of the cover of the utility model;

[0015] Figure 3 It is a schematic diagram of the cooperation between the clamping block and the clamping hole of the utility model. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Referring to the accompanying drawings: This touch switch with a protective function includes a base 1, a cover plate 2, a button 3 and a cover shell 4. The button 3 is movably installed in the base 1 and the upper end extends through the outside of the cover plate 2. The bottom of the cover shell 4 is open and has a chamber adapted to the base 1. The top of the cover shell 4 has a pressing sleeve 40. Through holes 10 are opened at the center of the front and rear sides of the base 1 and a clamping block 11 is telescopically arranged in the through hole 10. Clamping holes 41 adapted to the clamping block 11 are opened on the front and rear sides of the cover shell 4. When the cover shell 4 is installed, the clamping block 11 is caused to retract into the through hole 10. After the cover shell 4 reaches the predetermined installation position, the clamping block 11 pops out and forms a limit clamping with the clamping hole 41 to achieve the clamping of the cover shell 4.

[0018] When in use, the pressing sheath 40 (made of elastic rubber material) on the top of the cover 4 can completely cover the matching gap between the button 3 and the base 1, preventing water, dust and oil from the outside of the touch switch from penetrating into the inside of the switch, playing a good protective effect and improving the service life of the touch switch;

[0019] The cover shell 4 and the base 1 are installed and fixed by the limited clamping formed between the clamping block 11 and the clamping hole 41, which ensures the convenience of assembly and disassembly of the cover shell 4 and the installation stability of the cover shell 4.

[0020] A guide sleeve 12 is fixedly installed in the through hole 10, and a guide hole 13 is formed at the center of the guide sleeve 12. Two limiting grooves 14 are correspondingly provided at the open end of the guide hole 13. The block 11 is adapted to the size of the guide hole 13 and the outer side of the block 11 has a limiting block 15 adapted to the two limiting grooves 14. The outer end of the block 11 extends to the outside of the base 1 and is provided with an inclined waist 16; at least two assembly seats 5 are correspondingly provided on the inner wall of the base 1 at the clamping hole 41, and the two assembly seats 5 are fixed with spring pieces 50 adapted to the block 11; the spring piece 50 includes an assembly portion 51 connected to the assembly seat 5, and the outer end of the assembly portion 51 extends with a bending portion 52 bent toward one side of the block 11, and the outer end of the bending portion 52 is against the inner end of the block 11.

[0021] When in use, the sliding path of the block 11 is limited by the cooperation between the limit block 15 and the limit hole. When installing the cover shell 4, its bottom opening is aligned with the base 1 and pushed in. The cover shell 4 moves down and its lower open end contacts the inclined waist 16, thereby prompting the block 11 to overcome the force of the bending parts 52 of the two cooperating spring sheets 50 and shrink into the through hole 10. At this time, the cover shell 4 continues to move until the position of the outer hole 41 corresponds to the block 11. At this time, the stored energy of the two spring sheets 50 is released and the block 11 is pushed out of the through hole 10. At this time, the block 11 and the hole 41 form a limit clamping to complete the installation and fixation of the cover shell 4; when the cover shell 4 needs to be removed, the two blocks 11 are pushed into the through hole 10 so that the limit locking between the two blocks 11 and the hole 41 disappears.

[0022] A fixing seat 42 is fixedly provided at the open end outside the clamping hole 41 of the cover shell 4, a movable hole 43 is opened in the middle of the fixing seat 42, and a pressing block 44 is slidably arranged in the movable hole 43, and the outer end of the pressing block 44 extends to the outside of the fixing seat 42 and extends with a pressing portion 45; two guide grooves 46 are correspondingly opened at the inner open end of the fixing seat 42, and a guide block 47 adapted to the two guide grooves 46 is provided on the outer side of the pressing block 44.

[0023] When the cover 4 needs to be removed during use, the pressing portion 45 causes the pressing block 44 to be pressed internally, and the guide groove 46 and the guide block 47 cooperate to limit the moving path of the pressing block 44. The internal pressure of the pressing block 44 causes the clamping block 11 to be completely retracted into the through hole 10 and to be out of contact with the clamping hole 41. At this time, the cover 4 can be removed.

[0024] The size of the pressing block 44 is larger than that of the through hole 10 , so as to prevent the pressing block 44 from mistakenly entering the through hole 10 and affecting the disassembly of the cover shell 4 .

[0025] The left and right sides of the base 1 are provided with connection pins 6 .

[0026] When in use, a power connection sheet is installed in the base 1. When the button 3 is pressed, the bottom of the button 3 is pressed against the upper end of the power connection sheet, and the node sheet is connected to the connection pin 6. The above is the prior art and will not be described in detail.

[0027] Assembling parts are distributed at the four corners of the end surface of the cover plate 2. The assembling parts pass through the cover plate 2 and are fixedly connected to the base 1 to realize the assembly of the base 1 and the cover plate 2. The top of the cover shell 4 has a protrusion at the corresponding position of each assembly part to accommodate each assembly part.

[0028] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A touch switch with a protective function, comprising a base (1), a cover plate (2), a button (3) and a cover shell (4), characterized in that: The button (3) is movably installed in the base (1) and the upper end thereof passes through the outside of the extension cover plate (2); the bottom of the cover shell (4) is open and has a chamber adapted to the base (1); the top of the cover shell (4) has a pressing sleeve (40); through holes (10) are provided at the center of the front and rear sides of the base (1) and a clamping block (11) is telescopically arranged in the through hole (10); the front and rear sides of the cover shell (4) are provided with clamping holes (41) adapted to the clamping block (11); when the cover shell (4) is installed, the clamping block (11) is caused to retract into the through hole (10); after the cover shell (4) reaches a predetermined installation position, the clamping block (11) pops out and forms a limit clamping with the clamping hole (41) to achieve clamping of the cover shell (4).

2. The touch switch with protection function according to claim 1, characterized in that: A guide sleeve (12) is fixedly installed in the through hole (10), a guide hole (13) is formed at the center of the guide sleeve (12), two limit grooves (14) are correspondingly provided at the open end of the guide hole (13), the clamping block (11) is adapted to the size of the guide hole (13), and a limit block (15) adapted to the two limit grooves (14) is provided on the outer side of the clamping block (11), and the outer end of the clamping block (11) extends to the outside of the base (1) and is provided with an inclined waist (16).

3. The touch switch with protection function according to claim 2, characterized in that: At least two assembly seats (5) are arranged on the inner wall of the base (1) at the clamping hole (41) and correspond to each other. Both assembly seats (5) are fixed with spring pieces (50) adapted to the clamping block (11).

4. The touch switch with protection function according to claim 3, characterized in that: The spring sheet (50) comprises an assembly portion (51) connected to the assembly seat (5); an outer end of the assembly portion (51) extends to have a bending portion (52) bent toward one side of the clamping block (11); an outer end of the bending portion (52) abuts against an inner end of the clamping block (11).

5. The touch switch with protection function according to claim 1, characterized in that: The cover shell (4) is fixedly provided with a fixing seat (42) at the open end outside the clamping hole (41), a movable hole (43) is opened in the middle of the fixing seat (42), and a pressing block (44) is slidably arranged in the movable hole (43), and the outer end of the pressing block (44) extends outside the fixing seat (42) and is extended with a pressing portion (45).

6. The touch switch with protection function according to claim 5, characterized in that: Two guide grooves (46) are correspondingly formed at the inner open end of the fixing seat (42), and a guide block (47) adapted to the two guide grooves (46) is provided on the outer side of the pressing block (44).

7. The touch switch with protection function according to claim 6, characterized in that: The left and right sides of the base (1) are provided with connection pins (6).

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