CN219916989U

CN219916989U - Sealed wave band switch structure

Info

Publication number: CN219916989U
Application number: CN202321698970.4U
Authority: CN
Inventors: 蔡鹏�; 杜正辉; 雷洪
Original assignee: Dongguan Shangli Electronic Technology Co ltd
Current assignee: Dongguan Shangli Electronic Technology Co ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-10-27
Anticipated expiration: 2033-06-30

Abstract

The utility model provides a sealed wave band switch structure, which comprises a round cover type base, a round cover type shaft sleeve and a rotating handle, wherein the round cover type shaft sleeve is covered on the opening side of the base to form a closed cavity; the sealing ring is arranged between the rotating handle and the shaft sleeve, the base and the shaft sleeve are combined with each other through a sealing structure, the sealing structure comprises an annular inserting edge formed by axially extending one side edge of an opening of one component in the base or the shaft sleeve, and an annular inserting groove which is formed by axially and inwards concave one side edge of an opening of the other component and is tightly matched with the inserting edge, and the component of the forming inserting groove is a tough plastic component. The grafting edge is tightly matched with the grafting groove, the component of the shaping grafting groove is a tough plastic component, the inside and outside both sides wall of grafting groove can be closely attached with the lateral wall of grafting groove, two annular sealing surfaces around the week are formed, the sealing effect is strong, the tight combination between base and the axle sleeve, and the grafting groove can not fracture, even if vibrate for a long time also be difficult to loose, the reliability of structure is very high.

Description

Sealed wave band switch structure

Technical Field

The utility model relates to the technical field of rotary band switches, in particular to a sealed band switch structure.

Background

With the upgrade of electric products such as washing machines, the control panel of some products is originally controlled a plurality of functions by a plurality of keys, and is integrated into the switching of different functions through a rotatory band switch. However, the use scene of the products requires the band switch to have higher waterproof sealing performance, otherwise, the control is easy to lose efficacy due to the entering of water vapor; in order to guarantee the leakproofness of rotatory band switch, the way of current this kind of product is, is set up band switch's base and axle sleeve into the corresponding structure of mutual lid, through ultrasonic welding in order to form sealed cavity between base and the axle sleeve, but ultrasonic welding can reduce the intensity of plastic to a certain extent, and welding area is less, and joint strength is low, and under vibration environment and long-term use in-process, the welding line of band switch appears the fracture easily for hidden danger such as sealed inefficacy exist for this product.

Disclosure of Invention

The utility model aims to provide a band switch structure with strong sealing performance and stable structure.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a sealed wave band switch structure, includes the dome type base that is provided with the electric contact piece, covers in the base open side in order to form the dome type axle sleeve of sealed cavity, the axial wears to locate the stem on the axle sleeve, and is located in the sealed cavity along with the stem rotates and with the brush subassembly that the electric contact piece contacted; the sealing ring is arranged between the rotating handle and the shaft sleeve, the base and the shaft sleeve are combined with each other through a sealing structure, the sealing structure comprises an annular inserting edge formed by axially extending one side edge of an opening of one component in the base or the shaft sleeve, and an annular inserting groove formed by axially concavely inserting one side edge of an opening of the other component and tightly matched with the inserting edge, and the component for forming the inserting groove is a tough plastic component.

Preferably, the member forming the plugging slot is a PA (nylon) material member.

Preferably, the axial section of the plugging edge comprises a sealing section tightly matched with the plugging groove and an inserting section which is connected with the sealing section and has a tapered thickness.

Preferably, the axial length of the insertion section is greater than the axial length of the sealing section.

In one preferred embodiment, the insertion groove is provided with a positioning protruding block, and correspondingly, the insertion edge is provided with a positioning notch adapted to the positioning protruding block.

Preferably, the inner side wall of the shaft sleeve is provided with a wave tooth surface distributed along the circumferential direction, the electric contact pieces are uniformly distributed on the inner bottom surface of the base in a radial shape around the center, concave parts of the wave tooth surface correspond to the positions of the electric contact pieces one by one, the electric brush assembly comprises a mounting seat, an electric brush fixed on the bottom surface of the mounting seat, and a positioning assembly protruding out of the mounting seat in the radial direction and elastically contacted with the wave tooth surface.

Preferably, the positioning assembly comprises a blind hole passing through the center of the mounting seat radially, a compression spring arranged in the blind hole, and a ball bearing propped against the outer end of the compression spring and contacted with the wave tooth surface.

Preferably, a positioning column axially extends from the center of the bottom surface of the mounting seat, and a positioning recess matched with the positioning column is formed in the inner bottom surface of the base.

The beneficial effects are that: the base and the shaft sleeve are tightly matched through the plugging edge and the plugging groove, the component of the formed plugging groove is a tough plastic component, the inner side wall and the outer side wall of the plugging groove can be tightly attached to the side wall of the plugging groove, two annular sealing surfaces around the periphery are formed, the sealing effect is strong, the base and the shaft sleeve are tightly combined, the plugging groove cannot crack, the plugging groove is not easy to loosen even if vibrated for a long time, the reliability of the structure is very high, and the base and the shaft sleeve are not required to be fixed through rivets and other structures, so that the product structure and the assembly process are simplified.

Drawings

The utility model will now be described in further detail with reference to the drawings and to specific examples.

FIG. 1 is a schematic diagram of the overall structure of a band switch according to an embodiment;

FIG. 2 is a schematic axial sectional view of a band switch according to an embodiment;

FIG. 3 is a schematic view of a shaft sleeve in an embodiment;

FIG. 4 is a schematic view of a rotating handle and brush assembly according to an embodiment;

fig. 5 is a schematic structural diagram of a base in an embodiment.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

referring to fig. 1 to 5, a sealed band switch structure includes a dome-shaped base 1 provided with an electrical contact 11, a dome-shaped sleeve 2 covering an opening side of the base 1 to form a closed cavity, a stem 3 axially penetrating the sleeve 2, and a brush assembly 4 located in the closed cavity, rotating with the stem 3 and contacting the electrical contact 11; the sealing ring 31 is arranged between the rotating handle 3 and the shaft sleeve 2, the base 1 and the shaft sleeve 2 are combined with each other through a sealing structure 5, the sealing structure 5 comprises an annular inserting edge 51 formed by axially extending the opening side edge of one component of the base 1 or the shaft sleeve 2, an annular inserting groove 52 formed by axially inwards concave the opening side edge of the other component and tightly matched with the inserting edge 51, and the component for forming the inserting groove 52 is a tough plastic component. In this embodiment, the insertion edge 51 is formed at the edge of the opening side of the base 1, and the insertion groove 52 is formed at the edge of the opening side of the sleeve 2.

The base 1 and the shaft sleeve 2 are tightly matched with the inserting groove 52 through the inserting edge 51, the components of the inserting groove 52 are tough plastic components, the inner side wall and the outer side wall of the inserting groove 52 can be tightly attached to the side wall of the inserting groove 52, two annular sealing surfaces around the periphery are formed, the sealing effect is strong, the base 1 and the shaft sleeve 2 are tightly combined, the inserting groove 52 cannot crack, the base is not easy to loosen even if vibrated for a long time, the reliability of the structure is very high, the base 1 and the shaft sleeve 2 are not required to be fixed through rivets and the like, and the product structure and the assembly process are simplified.

Further, the member forming the socket 52 is a PA material member. The nylon material has stronger toughness, high mechanical strength and outstanding fatigue resistance, and the formed inserting groove 52 can keep high reliability under tight fit combination and vibration environment.

Further, the axial section of the plugging edge 51 includes a sealing section 511 tightly fitted with the plugging slot 52, and an insertion section 512 connected to the sealing section 511 and having a tapered thickness. The insertion section 512 facilitates the smooth insertion of the insertion edge 51 into the insertion groove 52, and can be positioned when the base 1 is assembled with the sleeve 2 in a pressing manner.

Further, the axial length of the insertion section 512 is greater than the axial length of the sealing section 511. The insertion section 512 is longer than the sealing section 511, and the insertion section 512 increases the isolation height of the insertion edge 51, further improving the water resistance.

Further, the insertion groove 52 has a positioning protrusion 521 therein, and correspondingly, the insertion edge 51 has a positioning notch 513 adapted to the positioning protrusion 521. The positioning lug 521 and the positioning notch 513 position the assembly of the base 1 and the shaft sleeve 2, so that the assembly can be strictly and quickly aligned, and the production efficiency is improved.

Further, the inner sidewall of the sleeve 2 has a corrugated surface 21 distributed circumferentially, the electrical contacts 11 are uniformly distributed on the inner bottom surface of the base 1 radially around the center, the concave portions 211 of the corrugated surface 21 correspond to the positions of the electrical contacts 11 one by one, the brush assembly 4 comprises a mounting seat 41, a brush 42 fixed on the bottom surface of the mounting seat 41, and a positioning assembly 43 protruding radially from the mounting seat 41 and elastically contacting with the corrugated surface 21. The positioning component 43 and the wave tooth surface 21 enable the rotary handle 3 to have clear positioning when rotating, so that the wave band switch can accurately stay on the corresponding functional gear of each electric contact 11.

Further, the positioning assembly 43 includes a blind hole 411 passing radially through the center of the mounting seat 41, a compression spring 431 disposed in the blind hole 411, and a ball 432 abutting against the outer end of the compression spring 431 and contacting the wave tooth surface 21. The spring and ball 432 mounting structure is adopted, the mounting is simple, and the structure is stable and not easy to wear.

Further, a positioning column 412 axially extends from the center of the bottom surface of the mounting seat 41, and the inner bottom surface of the base 1 has a positioning recess 12 adapted to the positioning column 412. The positioning recess 12 can ensure that the positioning column 412 does not deflect when rotating, thereby improving the stability of the band switch.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A sealed wave band switch structure is characterized in that: the electric brush comprises a dome-shaped base provided with an electric contact piece, a dome-shaped shaft sleeve which is covered on the opening side of the base to form a closed cavity, a rotating handle which is axially arranged on the shaft sleeve in a penetrating manner, and an electric brush component which is positioned in the closed cavity, rotates along with the rotating handle and is contacted with the electric contact piece; the sealing ring is arranged between the rotating handle and the shaft sleeve, the base and the shaft sleeve are combined with each other through a sealing structure, the sealing structure comprises an annular inserting edge formed by axially extending one side edge of an opening of one component in the base or the shaft sleeve, and an annular inserting groove formed by axially concavely inserting one side edge of an opening of the other component and tightly matched with the inserting edge, and the component for forming the inserting groove is a tough plastic component.

2. The sealed band switch structure of claim 1, wherein: and the component for forming the inserting groove is a PA material component.

3. The sealed band switch structure of claim 1, wherein: the axial section of the plugging edge comprises a sealing section tightly matched with the plugging groove and an inserting section which is connected with the sealing section and has a tapered thickness.

4. A sealed band switch structure according to claim 3, characterized in that: the axial length of the insert section is greater than the axial length of the seal section.

5. The sealed band switch structure of claim 1, wherein: the inside of the inserting groove is provided with a positioning lug, and correspondingly, the inserting edge is provided with a positioning notch matched with the positioning lug.

6. The sealed band switch structure of claim 1, wherein: the electric brush assembly comprises a mounting seat, an electric brush fixed on the bottom surface of the mounting seat and a positioning assembly protruding radially from the mounting seat and elastically contacting with the wave tooth surface.

7. The sealed band switch structure of claim 6, wherein: the positioning assembly comprises a blind hole which radially penetrates through the center of the mounting seat, a compression spring arranged in the blind hole, and a ball which is propped against the outer end of the compression spring and is contacted with the wave tooth surface.

8. The sealed band switch structure of claim 6, wherein: the center of the bottom surface of the mounting seat axially extends out of a positioning column, and the inner bottom surface of the base is provided with a positioning recess matched with the positioning column.