CN214541980U

CN214541980U - Waterproof control switch

Info

Publication number: CN214541980U
Application number: CN202120573899.1U
Authority: CN
Inventors: 姚国祥; 章建丰; 陶俊斌; 严苗忠
Original assignee: NINGBO SHUNYUN ELECTRONIC CO Ltd
Current assignee: NINGBO SHUNYUN ELECTRONIC CO Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-10-29
Anticipated expiration: 2031-03-19

Abstract

The application relates to a waterproof control switch, which comprises a shell and a press plate hinged to the shell, wherein a touch switch is arranged in the shell, a mounting through hole is formed in the part, located between the press plate and the touch switch, of the shell, and a waterproof blocking rib is arranged on one side, facing the press plate, of the shell and is located in the circumferential direction of the mounting through hole; still including the sealing cap who makes through elastic material, sealing cap includes fixed part and the manger plate portion of coaxial setting, the external diameter of manger plate portion is greater than the external diameter of fixed part, fixed part interference mounting is in the installation through-hole, manger plate portion laminates on the terminal surface of waterproof fender muscle, sealing cap axial both ends respectively with the plunger of dabbing the switch and press board looks butt, it is fixed in according to the butt piece on board and/or the sealing cap to press to be provided with between board and the sealing cap, the external diameter that the butt piece is close to sealing cap one side is less than the aperture of installation through-hole. This application has the higher effect of waterproof ability.

Description

Waterproof control switch

Technical Field

The application relates to the field of mechanical press switches, in particular to a waterproof control switch.

Background

Mechanical push switches are widely used in household appliances such as water purifiers and water dispensers, but due to the special application environment, such switches are usually accompanied by special application conditions such as humidity and water immersion, and due to the high sensitivity of electronic circuits to water, such switches must have good waterproof effect.

In a mechanical push switch, a tact switch is usually used as a trigger unit of a switch signal, and with the progress of science and technology, a tact switch with a better waterproof effect is gradually improved by people and further improved, but only a part of the tact switch is improved to be waterproof. Since most of the tact switches are integrated on the circuit board, the waterproof capability of the whole mechanical push switch needs to be considered in the actual production process.

SUMMERY OF THE UTILITY MODEL

In order to improve the holistic waterproof ability of mechanical type push switch, this application provides a waterproof control switch.

The application provides a waterproof control switch adopts following technical scheme:

a waterproof control switch comprises a shell and a press plate hinged to the shell, wherein a touch switch is arranged in the shell, a mounting through hole is formed in the part, located between the press plate and the touch switch, of the shell, and a waterproof blocking rib is arranged on one side, facing the press plate, of the shell and located in the circumferential direction of the mounting through hole;

still including the sealing cap who makes through elastic material, sealing cap includes fixed part and the manger plate portion of coaxial setting, the external diameter of manger plate portion is greater than the external diameter of fixed part, fixed part interference mounting is in the installation through-hole, manger plate portion laminates on the terminal surface of waterproof fender muscle, sealing cap axial both ends respectively with the plunger of dabbing the switch and press board looks butt, it is fixed in according to the butt piece on board and/or the sealing cap to press to be provided with between board and the sealing cap, the external diameter that the butt piece is close to sealing cap one side is less than the aperture of installation through-hole.

Through adopting above-mentioned technical scheme, at first, realize preliminary sealing through fixed part and installation through-hole interference fit's mode, secondly, make through the setting of waterproof fender muscle can not get into in the casing when the inflow is not higher than the height of waterproof fender muscle, improved control switch's waterproof ability effectively. The sealing cap does not influence the triggering of the tact switch, and the abutting piece is smaller than the aperture of the mounting through hole in outer diameter, so that the abutting piece can force the water retaining part to deform in the pressing process of the pressing plate, and the tact switch is triggered.

Preferably, the fixing part is axially hollow.

Through adopting above-mentioned technical scheme, on the one hand, the mode that cavity set up can improve the deformation volume of manger plate portion, and the convenience triggers dabbing switch, and on the other hand, the mode that sets up through cavity is when pressing manger plate portion, and the fixed part can be to expanding all around under the applied pressure of butt piece, and then improves the pressure between the pore wall of fixed part and mounting hole to improve the sealed effect between fixed part and the casing, improve the waterproof ability of pressing the in-process.

Preferably, one side of the fixing part, which is far away from the water blocking part, is provided with a limiting part which is abutted against the inner cavity wall of the shell.

Through adopting above-mentioned technical scheme, the joint strength between sealing cap and the casing can be improved in setting up of spacing portion, reduces the installation back and takes place the drunkenness and produce the condition of influence to water-proof effects.

Preferably, the water blocking part is provided with a butting part which is arranged in the fixing part in a penetrating way and is butted with the plunger of the light touch switch.

Through adopting above-mentioned technical scheme, the setting of butt portion has improved the contact thickness of sealed cap and the plunger contact department that dabs the switch, and then is difficult to take place to break and lead to the leakproofness to descend after pressing many times, and then has improved water-proof effects and life between sealed cap and the casing to a certain extent.

Preferably, the water retaining part is provided with a penetrating groove for the waterproof blocking rib to penetrate through.

Through adopting above-mentioned technical scheme, the setting of wearing to establish the groove can improve the joint strength between the part of sealing cap protrusion outside the casing and the casing, and then makes the process of pressing sealing cap again kind, and water retaining portion is difficult to the pressurized and collapses to the installation through-hole in to this kind of connected mode also makes the infiltration route of water also comparatively complicated, has formed the sealed route similar to the labyrinth, thereby also can improve waterproof ability to a certain extent.

Preferably, the tact switch is installed on the circuit board, an opening for installing the circuit board is formed in one side, away from the pressing plate, of the shell, a fixing column abutted against the circuit board is arranged on one side, facing the circuit board, of the shell, a buckle for limiting the circuit board is arranged on the inner cavity wall of the shell and located on one side, facing the opening, of the circuit board, and the circuit board is connected with the fixing column through a fastening piece.

Through adopting above-mentioned technical scheme, this kind of setting mode makes only need a fastener can realize the fixed between circuit board and the casing, simple to operate simultaneously, and simple structure also can guarantee certain joint strength to a certain extent.

Preferably, a potting adhesive is filled between one side of the circuit board, which is far away from the tact switch, and the shell.

Through adopting above-mentioned technical scheme, the setting of casting glue has realized the complete sealing to cavity in the casing in sealed cap mutually supports, further improves the holistic waterproof performance of control switch.

Preferably, one side of the shell towards the pressing plate is provided with an installation part for installing the sealing cap, the installation part protrudes towards the pressing plate on the shell, and the pressing plate is provided with a penetrating cavity for the installation part to penetrate.

Through adopting above-mentioned technical scheme, this kind of setting makes water more difficult to get into the junction between sealing cap and the casing to can further improve the holistic sealed effect of control switch.

Preferably, one side on the installation department is provided with the spacing groove, be provided with the spacing stopper that slides in the spacing groove on pressing the inner chamber wall of board, press the board and rotate so that the stopper slides in the spacing groove along the articulated shaft.

Through adopting above-mentioned technical scheme, the setting of this structure has carried out spacingly to the stroke according to the board, avoids according to taking place to break away from between board and the casing to can also make according to the board through the injecing to the stroke and have certain packing force to sealed cap all the time, and then make sealed cap have higher sealed effect all the time to a certain extent, thereby guarantee the holistic waterproof performance of control switch to a certain extent.

Preferably, the shell is provided with a hinged part which is abutted against the two side cavity walls opposite to the penetrating cavity, and the waterproof control switch further comprises a hinged shaft which penetrates through the hinged part and the press plate.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the waterproof capability is stronger;

2. the installation steps are simpler, and the strength is higher.

Drawings

Fig. 1 is a schematic structural view of a waterproof control switch.

Fig. 2 is an exploded schematic view of a waterproof control switch.

Fig. 3 is a schematic view of a structure of a pressing plate.

Fig. 4 is a schematic view of a matching structure of the limiting block and the limiting buckle, which is a partial sectional view of the pressing plate.

Fig. 5 is a top view of the waterproof control switch.

Fig. 6 is a cross-sectional view a-a of fig. 5.

Fig. 7 is an exploded view of the circuit board and housing.

Description of reference numerals: 1. a housing; 2. pressing a plate; 11. an installation part; 3. a sealing cap; 21. the cavity is penetrated; 12. a hinge portion; 13. hinging a shaft; 14. a limiting groove; 22. a limiting block; 15. a limit buckle; 4. a circuit board; 5. a tact switch; 16. waterproof and rib-blocking; 31. a fixed part; 32. a water retaining part; 33. a limiting part; 34. a groove is arranged in a penetrating way; 35. an abutting portion; 6. an abutting member; 17. fixing a column; 18. buckling; 19. mounting a through hole; 110. and abutting against the column.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses waterproof control switch. Referring to fig. 1 and 2, the waterproof control switch includes a casing 1 and a pressing plate 2 hinged to the casing 1, an electronic component is provided in the casing 1, an outward protruding mounting portion 11 is provided on one side of the casing 1 facing the pressing plate 2, a mounting through hole 19 communicated with an inner cavity of the casing 1 is provided on the mounting portion 11, and a sealing cap 3 is fixed on the mounting portion 11 and located at the mounting through hole 19 in a sealing manner. In the figure, for example, two mounting portions 11 and two pressing plates 2 are provided on the same housing 1 and are in one-to-one correspondence, but the number and the distribution of the mounting portions 11 and the pressing plates 2 are not limited to this embodiment, and may be freely selected according to actual situations.

Referring to fig. 2 and 3, the push plate 2 is provided with a through cavity 21 through which the mounting portion 11 is inserted, one side of the housing 1 located at the mounting portion 11 is provided with a hinge portion 12 inserted into the through cavity 21, the hinge portion 12 abuts against the cavity walls of both sides opposite to the through cavity 21, and the hinge portion 12 and the push plate 2 are provided with a hinge shaft 13 through the hinge shaft 13, so that the push plate 2 can rotate about the hinge shaft 13.

Referring to fig. 3 and 4, a limiting groove 14 is formed at one side of the mounting portion 11, a limiting block 22 limiting the sliding movement in the limiting groove 14 is formed on the inner cavity wall of the pressing plate 2, and the pressing plate 2 rotates along the hinge shaft 13 to enable the limiting block 22 to slide in the limiting groove 14. As a specific embodiment, a limit buckle 15 protruding upwards is integrally disposed on the mounting portion 11 and on a side of the sealing cap 3 away from the hinge portion 12, and a limit groove 14 is opened on a side surface of the limit buckle 15 facing the outside of the mounting portion 11 for the limit block 22 on the pressing plate 2 to penetrate through. In the process that the pressing plate 2 rotates along the hinge shaft 13, the limiting block 22 can correspondingly slide in the limiting groove 14, and the angle that the pressing plate 2 can rotate is also related to the stroke that the limiting block 22 can slide in the limiting groove 14. For convenient installation, the limiting block 22 is provided with a guide surface.

Referring to fig. 4 and 6, the electronic components in the housing 1 include a circuit board 4 and tact switches 5 disposed on the circuit board 4, the tact switches 5 are located on a side of the circuit board 4 facing the sealing caps 3, and each tact switch 5 corresponds to a corresponding sealing cap 3. The shell 1 faces one side of the pressing plate 2 and is provided with a waterproof blocking rib 16 in the circumferential direction of the installation through hole 19, and the inner wall of the waterproof blocking rib 16 and the inner wall of the installation through hole 19 are located on the same cylindrical surface. The sealing cap 3 comprises a fixing portion 31 and a water retaining portion 32 which are coaxially and integrally arranged, the fixing portion 31 is axially arranged in a hollow mode, penetrates through the installation through hole 19 and is in interference fit with the installation through hole 19, and a limiting portion 33 which is abutted against the inner cavity wall of the shell 1 is integrally arranged on one side, away from the water retaining portion 32, of the fixing portion 31. The outer diameter of the water retaining portion 32 is larger than the outer diameter of the water retaining portion 32 and is attached to the upper end face of the waterproof rib 16, and the water retaining portion 32 is provided with a through groove 34 for the waterproof rib 16 to penetrate through, preferably, the size of the through groove 34 is the same as that of the waterproof rib 16, and the lower end face of the water retaining portion 32 is abutted to the upper end face of the mounting portion 11.

The water blocking part 32 is integrally provided with an abutting part 35 which is arranged in the fixing part 31 in a penetrating way and is abutted against the plunger of the light touch switch 5, an abutting part 6 fixed on the pressing plate 2 and/or the sealing cap 3 is arranged between the pressing plate 2 and the sealing cap 3, and the outer diameter of one side of the abutting part 6 close to the sealing cap 3 is smaller than the aperture of the installation through hole 19. The purpose of the abutting piece 6 is to enable the center of the water retaining part 32 to be sunken into the shell 1 in the process of pressing the press plate 2, and then trigger the tact switch 5 installed in the shell 1. Thus, the abutment 6 may be provided only on the water stopper 32 and projected in a direction approaching the push plate 2, or may be provided only on the push plate 2 so that the center of the water stopper 32 may be recessed inward. In the present embodiment, the abutment 6 is preferably provided on both the water stopper 32 and the pressing plate 2.

However, in order to improve the sensitivity when the push plate 2 is pushed, when the stopper 22 abuts against the upper end surface of the stopper groove 14 (i.e., when the push plate 2 is tilted up to the maximum stroke), the distance between the abutment member 6 on the push plate 2 and the plunger of the tact switch 5 is smaller than the distance between the upper end surface of the abutment member 6 on the water blocking portion 32 and the lower end surface of the abutment portion 35, and the seal cap 3 is fitted in the axial direction by interference fit. The sealing cap 3 is made of an elastic material, and as an embodiment, may be made of silicone.

Therefore, under the installation mode of the interference fit of the sealing cap 3 and under the action of the elastic force of the tact switch 5, the pressing plate 2 always tends to tilt upwards, and meanwhile, when the pressing plate 2 is pressed downwards, the middle of the water retaining part 32 is driven to recess towards the shell 1 under the action of the abutting part 6, so that the abutting part 35 fixed on the water retaining part 32 moves towards the direction of the circuit board 4, and at the moment, the fixing part 31 tends to expand outwards under the action of the downward recessed water retaining part 32 and drives the plunger of the tact switch 5 to move downwards so as to be triggered. It can be seen that a good sealing between the sealing cap 3 and the housing 1 is still ensured during the pressing process.

Referring to fig. 7, casing 1 deviates from and is provided with the opening that supplies the installation of circuit board 4 in one side according to board 2, and casing 1 is provided with the fixed column 17 with circuit board 4 butt towards one side of circuit board 4, and an organic whole is provided with a plurality of butt posts 110 with circuit board 4 butt on casing 1's the internal perisporium, and fixed column 17 passes through the fastener with circuit board 4 and is connected, just is located circuit board 4 and is provided with the buckle 18 that is used for restricting circuit board 4 towards open-ended one side an organic whole on casing 1's the inner chamber wall. Specifically, the shape of the circuit board 4 is matched with the cross section of the shell 1, and the shape and the size of the outer edge of the circuit board 4 are approximately the same as those of the inner cavity wall of the shell 1. In the present embodiment, the fixing post 17 is disposed off the geometric center of the circuit board 4, and the latch 18 is correspondingly disposed at a position away from the fixing post 17 on the geometric center of the circuit board 4. Meanwhile, the fastening member is preferably provided as a screw, which may be connected by using other fastening members, and will not be described herein.

In order to seal the side of the casing 1 far away from the press plate 2, a containing groove is formed between the side of the circuit board 4 far away from the tact switch 5 and the casing 1, and pouring sealant is filled in the containing groove. However, it should be noted that the gap between the circuit board 4 and the housing 1 should not be too large, and the potting adhesive should not penetrate into the side of the circuit board 4 where the tact switch 5 is disposed.

The implementation principle of the waterproof control switch in the embodiment of the application is as follows: the setting of the fixed part 31 of the sealing cap 3 realizes the first sealing to the junction between the sealing cap 3 and the shell 1, and the maximum water immersion amount that the control switch can bear is also improved through the setting of the convex waterproof blocking rib 16 and the convex installation part 11, and the pressing of the pressing plate 2 can also ensure the good waterproof effect.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A waterproof control switch which is characterized in that: the waterproof button comprises a shell (1) and a pressing plate (2) hinged to the shell (1), wherein a touch switch (5) is arranged in the shell (1), a mounting through hole (19) is formed in the part, located between the pressing plate (2) and the touch switch (5), of the shell (1), and a waterproof barrier rib (16) is arranged on one side, facing the pressing plate (2), of the shell (1) and located in the circumferential direction of the mounting through hole (19);

still including sealing cap (3) of making through elastic material, sealing cap (3) are including fixed part (31) and the manger plate portion (32) of coaxial setting, the external diameter of manger plate portion (32) is greater than the external diameter of fixed part (31), fixed part (31) interference mounting is in installation through-hole (19), manger plate portion (32) laminate on the terminal surface of waterproof fender muscle (16), sealing cap (3) axial both ends respectively with the plunger of light touch switch (5) and press board (2) looks butt, be provided with between pressing board (2) and sealing cap (3) and be fixed in pressing butt piece (6) on board (2) and/or sealing cap (3), the external diameter that butt piece (6) are close to sealing cap (3) one side is less than the aperture of installation through-hole (19).

2. The waterproof control switch of claim 1, wherein: the fixing part (31) is axially arranged in a hollow manner.

3. The waterproof control switch of claim 2, wherein: and a limiting part (33) which is abutted against the inner cavity wall of the shell (1) is arranged on one side of the fixing part (31) far away from the water blocking part (32).

4. The waterproof control switch of claim 2, wherein: the water blocking part (32) is provided with a butting part (35) which is arranged in the fixing part (31) in a penetrating way and is butted with the plunger of the light touch switch (5).

5. The waterproof control switch of claim 1, wherein: the water retaining part (32) is provided with a penetrating groove (34) for the waterproof blocking rib (16) to penetrate through.

6. The waterproof control switch according to any one of claims 1 to 5, wherein: the light touch switch (5) is installed on the circuit board (4), an opening for installing the circuit board (4) is formed in one side, away from the pressing plate (2), of the shell (1), a fixing column (17) abutted to the circuit board (4) is arranged on one side, facing the circuit board (4), of the shell (1), a buckle (18) used for limiting the circuit board (4) is arranged on the inner cavity wall of the shell (1) and located on one side, facing the opening, of the circuit board (4), and the circuit board (4) is connected with the fixing column (17) through a fastening piece.

7. The waterproof control switch of claim 6, wherein: and a pouring sealant is filled between one side of the circuit board (4) departing from the tact switch (5) and the shell (1).

8. The waterproof control switch according to any one of claims 1 to 5, wherein: casing (1) orientation is provided with installation department (11) that supply sealing cap (3) to install according to one side of board (2), installation department (11) are to pressing board (2) protrusion on casing (1), be provided with on pressing board (2) and supply installation department (11) to wear to establish chamber (21) of wearing to establish.

9. The waterproof control switch of claim 8, wherein: one side on installation department (11) is provided with spacing groove (14), be provided with spacing stopper (22) of sliding in spacing groove (14) on the inner chamber wall according to board (2), rotate so that stopper (22) slide in spacing groove (14) along articulated shaft (13) according to board (2).

10. The waterproof control switch of claim 8, wherein: the waterproof control switch is characterized in that the shell (1) is provided with a hinged part (12) which is abutted against the two side cavity walls opposite to the penetrating cavity (21), and the waterproof control switch further comprises a hinged shaft (13) which penetrates through the hinged part (12) and the press plate (2).