CN108166214B

CN108166214B - Key structure and washing machine

Info

Publication number: CN108166214B
Application number: CN201711432345.4A
Authority: CN
Inventors: 盛海泳; 黄涛; 张华成
Original assignee: Qingdao Haier Washing Electric Appliance Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Electric Appliance Co Ltd; Haier Smart Home Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2022-09-02
Anticipated expiration: 2037-12-26
Also published as: CN108166214A

Abstract

The invention discloses a key structure and a washing machine, and relates to the technical field of washing machines. The button structure includes casing, button, PCB board, box body and bellows, be provided with the mounting hole on the casing, the button press the button cap with mounting hole sliding fit, the PCB board is located in the box body, be provided with the through-hole on the box body, the bellows cover is established epaxial in the button, just the both ends of bellows respectively with press the button cap with the box body butt, the axis passes the through-hole, and with switch cooperation on the PCB board. In this button structure, through the bellows and the butt formation waterproof construction according to button cap and box body, the elasticity of bellows not only can guarantee feeling of button, and rapid, the unimpeded sense when making the button kick-back can also improve the waterproof performance of button structure, avoids inside water gets into the electrical part to reduce the potential safety hazard, improve the life of button structure.

Description

Key structure and washing machine

Technical Field

The invention relates to the technical field of washing machines, in particular to a key structure and a washing machine.

Background

The washing machine is a common household appliance, and along with the intelligent development of the washing machine, the washing machine is generally provided with a main control board, keys are arranged on the main control board, and a user controls the washing machine to start or select corresponding functions and washing parameters through the keys when using the washing machine. When the washing machine is used, the keys need to have a waterproof function on the basis of meeting certain hand feeling, and water is prevented from contacting with electrical elements inside the washing machine in the use process of the washing machine, so that the safety risk caused by failure of electrical devices is avoided.

In the existing key structure, the waterproof performance of the key is poor, the situations of water inlet and the like of an electric device inside the washing machine easily occur, and potential safety hazards exist.

Disclosure of Invention

The invention aims to provide a key structure which has good waterproof performance and key hand feeling.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a key structure, includes casing, button and PCB board, be provided with the mounting hole on the casing, the button the cap with mounting hole sliding fit still includes box body and bellows, the PCB board is located in the box body, be provided with the through-hole on the box body, the bellows cover is established epaxial in the button, just the both ends of bellows respectively with the cap with the box body butt, the axis passes the through-hole, and with switch cooperation on the PCB board.

Wherein the diameter of the inner hole of the corrugated pipe is smaller than that of the through hole.

The key cap comprises a top plate and a side wall arranged around the top plate, the middle shaft and the side wall are located on the same side of the key cap, and the side wall is in sliding fit with the mounting hole.

Wherein, the tip of bellows and button cap interference fit.

Wherein, the lateral wall epirelief is equipped with butt portion, the inboard of casing is provided with the U template, the opening orientation of U template the casing sets up, butt portion stretches into the U template with between the casing, press during the button, butt portion with the bottom plate butt of U template, when loosening the button, butt portion with the casing butt.

The side wall is provided with a plurality of abutting parts, the abutting parts are uniformly arranged along the circumferential direction of the top plate, and the number of the U-shaped plates is matched with the number of the abutting parts.

The side wall is convexly provided with a limiting part, the inner side of the shell is provided with a limiting groove, and the limiting part is matched with the limiting groove and can move in the limiting groove along the direction vertical to the shell.

The corrugated pipe is provided with a flange at the end part close to the box body, and the flange is fixedly connected with the box body.

The flange is provided with a positioning hole, the box body is convexly provided with a positioning column, and the positioning hole is matched with the positioning column.

The outer wall of one end, close to the key cap, of the corrugated pipe is inwards sunken to form a flow guide groove.

Another object of the present invention is to provide a washing machine, in which the key has good waterproof performance and hand feeling, and long service life, and is beneficial to reducing the failure rate of the washing machine.

a washing machine comprises the key structure.

Has the advantages that: the invention provides a key structure and a washing machine. The button structure includes casing, button, PCB board, box body and bellows, be provided with the mounting hole on the casing, the button press the button cap with mounting hole sliding fit, the PCB board is located in the box body, be provided with the through-hole on the box body, the bellows cover is established epaxial in the button, just the both ends of bellows respectively with press the button cap with the box body butt, the axis passes the through-hole, and with switch cooperation on the PCB board. In this button structure, through the bellows and the butt formation waterproof construction according to button cap and box body, the elasticity of bellows not only can guarantee feeling of button, and rapid, the unimpeded sense when making the button kick-back can also improve the waterproof performance of button structure, avoids inside water gets into the electrical part to reduce the potential safety hazard, improve the life of button structure.

Drawings

FIG. 1 is an exploded view of a key structure provided by the present invention;

FIG. 2 is a front view of the key structure provided by the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a schematic structural diagram of a key provided in the present invention;

FIG. 6 is an assembly view of the housing and key provided by the present invention;

FIG. 7 is a cross-sectional view of a housing provided by the present invention;

FIG. 8 is a schematic structural view of a bellows provided by the present invention;

fig. 9 is a sectional view taken along line C-C in fig. 8.

Wherein:

1. a housing; 11. mounting holes; 12. a U-shaped plate; 13. a limiting groove;

2. pressing a key; 21. a top plate; 22. a middle shaft; 23. a side wall; 231. an abutting portion; 232. a limiting part;

3. a bellows; 31. a diversion trench; 32. a flange;

4. a box body; 41. a through hole; 42. a positioning column;

5. a PCB board; 51. and (4) switching.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

The present embodiment provides a washing machine, which is provided with a button structure having a waterproof function in order to improve waterproof performance of buttons in the washing machine and prevent water from entering electric devices inside the washing machine. As shown in fig. 1 and 2, the key structure includes a housing 1, a key 2 and a PCB 5, wherein the housing 1 may be a main control board of the washing machine, the main control board is provided with a display area and a function selection area, the key 2 is provided in the function selection area for a user to start a program or select a function, and the display area displays a currently executed operation and specific parameters. The main control board is provided with a mounting hole 11, the key 2 comprises a key cap and a middle shaft 22, the PCB 5 is provided with a switch 51, the key cap is in sliding fit with the mounting hole 11, so that when the key 2 is pressed, the key 2 moves towards the PCB 5, the middle shaft 22 presses the switch 51 on the PCB 5, and when the key 2 is released, the key 2 rebounds and resets.

In order to realize the waterproof function of the key structure, the key structure further comprises a box body 4 and a corrugated pipe 3, the PCB 5 is arranged in the box body 4, the box body 4 can be a computer board box in a washing machine, a through hole 41 is formed in the computer board box, and the middle shaft 22 can penetrate through the through hole 41 to be in contact with a switch 51 on the PCB 5 when moving along with the key 2. As shown in fig. 8 and 9, the bellows 3 is a tubular elastic sensitive element formed by connecting foldable corrugated sheets along a folding and stretching direction, the bellows 3 is sleeved on the central shaft 22, and two ends of the bellows 3 are respectively abutted against the key cap and the computer board box to form a waterproof mechanism, the bellows 3 is in a compressed state, the two ends of the bellows 3 are respectively tightly attached to the key cap and the computer board box due to the elasticity of the bellows 3, so that water can be prevented from entering the computer board box along the key 2, and water is prevented from contacting with electric devices such as the PCB 5 and the like, thereby improving the waterproof performance of the key structure, avoiding potential safety hazards caused by contact damage of the electric devices and the water, improving the safety performance of the washing machine, and reducing the failure rate.

Set up bellows 3 between button 2 and the computer board box, the elasticity of bellows 3 can make button 2 kick-back rapidly under the condition of not receiving the external force, and button 2 removes smoothly, the unhindered sense, has guaranteed button 2's feeling, has improved user's use and has experienced.

As shown in fig. 3 and 4, the key 2 includes a key cap and a middle shaft 22, the key cap includes a top plate 21 and a sidewall 23 disposed around the top plate 21, the sidewall 23 is slidably fitted with the mounting hole 11, the sidewall 23 is continuously disposed and forms a groove with the top plate 21, the middle shaft 22 extends from the groove, the corrugated pipe 3 is sleeved outside the middle shaft 22, and one end of the corrugated pipe extends into the groove and abuts against the top plate 21. For further improving the waterproof performance of button structure, bellows 3 and button cap can interference fit, can make on the one hand button cap and 3 inseparable laminatings of bellows, and on the other hand can also fix bellows 3, prevents 3 drunkenness of bellows, improves sealing performance.

In order to limit the maximum stroke of the key 2, as shown in fig. 5-7, an abutting portion 231 is further convexly provided on the side wall 23 of the key cap, a U-shaped plate 12 is further provided on the inner side of the main control board, an opening of the U-shaped plate 12 is disposed toward the main control board, two side edges of the U-shaped plate 12 are fixed to the main control board, so that a cavity is formed between the U-shaped plate 12 and the main control board, and the abutting portion 231 extends into the cavity. When the key 2 is not under the action of external force, the key 2 makes the abutting part 231 abut against the main control board under the elastic action of the corrugated pipe 3, so that the key 2 is prevented from being separated from the main control board; when the key 2 is pressed, the key 2 overcomes the resistance of the corrugated pipe 3 and moves towards the direction of the PCB 5 until the abutting part 231 abuts against the bottom plate of the U-shaped plate 12, at the moment, the middle shaft 22 penetrates through the through hole 41 in the computer board box to contact with the switch 51 on the PCB 5, the switch 51 is triggered, the abutting part 231 abuts against the bottom plate of the U-shaped plate 12, the key 2 is limited to continue to move towards the direction of the PCB 5, and therefore the key 2 is prevented from being excessively stressed to damage the switch 51 on the PCB 5.

For making button 2 atress in the pressing process even, in this embodiment, can be provided with a plurality of butt portions 231 on button 2's the lateral wall 23, a plurality of butt portions 231 can encircle the even setting in center of roof 21, and the number of U template 12 on the main control board is the same with the number of butt portion 231, and the position corresponds, is favorable to improving the homogeneity of button 2 atress, increases the life of button structure. In this embodiment, the top plate 21 of the key 2 is circular, the axis of the central shaft 22 passes through the center of the top plate 21, the mounting hole 11 is also circular, four abutting portions 231 are provided, and the four abutting portions 231 are uniformly distributed along the circumferential direction of the top plate 21, so that the key 2 is uniformly stressed. In other embodiments, the top plate 21 may have other shapes, such as a rectangle, a triangle, etc., and the shape of the mounting hole 11 is adapted to the shape of the top plate 21.

For avoiding button 2 to rotate at the pressing process to make bellows 3 twist reverse the sealed water-proof effects of influence, as shown in fig. 6, lateral wall 23 can also protruding spacing portion 232 that is equipped with in this embodiment, the protruding spacing muscle mechanism that is equipped with of inboard of casing 1, spacing muscle encloses into spacing groove 13, spacing portion 232 and spacing groove 13 cooperation, and pressing the in-process of button 2, spacing portion 232 is located spacing groove 13 all the time, restriction button 2 rotates, thereby improve button structure's stability and reliability.

In order to fix the position of the corrugated pipe 3 and avoid the influence of the dislocation of the corrugated pipe 3 on the waterproof effect when the press key 2 is pressed, the corrugated pipe 3 can be fixed with a computer board box. Specifically, as shown in fig. 4 and 9, a flange 32 is convexly disposed at one end of the corrugated tube 3 close to the computer board box, the flange 32 is fixedly connected with the computer board box, and the other end of the corrugated tube 3 is fixed in an interference fit manner with the key cap, so that the position of the corrugated tube 3 is completely fixed, and the corrugated tube 3 can be prevented from being dislocated in the compression process.

In order to fix the corrugated pipe 3 and the computer board box conveniently, a positioning column 42 can be arranged on the computer board box in a protruding mode, a positioning hole is formed in the flange 32 of the corrugated pipe 3, and the corrugated pipe 3 and the computer board box can be fixed conveniently through the matching of the positioning hole and the positioning column 42. The computer board box and the corrugated pipe 3 can be fixed in a threaded connection mode, an adhesion mode and the like. In this embodiment, in order to simplify the key structure, the positioning column 42 and the positioning hole can fix the corrugated tube 3 on the computer board box through interference fit, and during assembly, the end of the corrugated tube 3 is abutted against the computer board box, so as to improve the waterproof performance and prevent water from flowing into the PCB 5 through the gap between the corrugated tube 3 and the computer board box.

In order to lead the water entering the key structure from the gap between the key cap and the main control board out of the washing machine, the outer wall of the corrugated pipe 3 close to one end of the key cap can be sunken inwards to form a diversion trench 31, the water can be collected through the diversion trench 31 and discharged out of the washing machine after entering, and the water is prevented from continuously flowing towards the PCB 5.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims

1. A key structure comprises a shell (1), a key (2) and a PCB (5), wherein a mounting hole (11) is formed in the shell (1), a key cap of the key (2) is in sliding fit with the mounting hole (11), the key structure is characterized by further comprising a box body (4) and a corrugated pipe (3), the PCB (5) is located in the box body (4), the box body (4) is arranged between the shell (1) and the PCB (5), the outer wall of one end, close to the key cap, of the corrugated pipe (3) is inwards sunken to form a flow guide groove (31), the PCB (5) is located on the left side of the key (2), a through hole (41) is formed in the box body (4), the corrugated pipe (3) is sleeved on a center shaft (22) of the key (2), and two ends of the corrugated pipe (3) are respectively abutted to the key cap and the box body (4), the middle shaft (22) penetrates through the through hole (41) and is matched with a switch (51) on the PCB (5); the key cap comprises a top plate (21) and a side wall (23) arranged around the top plate (21), the middle shaft (22) and the side wall (23) are positioned on the same side of the key cap, and the side wall (23) is in sliding fit with the mounting hole (11); an abutting part (231) is convexly arranged on the side wall (23), a U-shaped plate (12) is arranged on the inner side of the shell (1), an opening of the U-shaped plate (12) faces the shell (1), two side edges of the U-shaped plate (12) are fixed with the shell (1) to form a cavity between the U-shaped plate (12) and the shell (1), the abutting part (231) extends into the cavity, the abutting part (231) extends between the U-shaped plate (12) and the shell (1), when the key (2) is pressed, the abutting part (231) abuts against a bottom plate of the U-shaped plate (12), and when the key (2) is released, the abutting part (231) abuts against the shell (1); lateral wall (23) epirelief is equipped with spacing portion (232), the inboard of casing (1) is provided with spacing groove (13), spacing portion (232) with spacing groove (13) cooperation, and can follow the perpendicular in spacing groove (13) the direction of casing (1) removes.

2. A key structure according to claim 1, characterised in that the end of the bellows (3) is an interference fit with the key cap.

3. A key structure according to claim 1, wherein said side wall (23) is provided with a plurality of said abutting portions (231), said plurality of said abutting portions (231) are uniformly arranged along the circumference of said top plate (21), and the number of said U-shaped plates (12) is adapted to the number of said abutting portions (231).

4. The key structure according to claim 1, characterized in that the end of the bellows (3) close to the box body (4) is provided with a flange (32) in a protruding manner, and the flange (32) is fixedly connected with the box body (4).

5. A key structure according to claim 4, wherein said flange (32) is provided with positioning holes, and said box body (4) is provided with positioning posts (42) in a protruding manner, and said positioning holes are matched with said positioning posts (42).

6. A washing machine characterized by comprising a key structure according to any one of claims 1 to 5.