CN220256283U

CN220256283U - Knob connection structure and egg boiler

Info

Publication number: CN220256283U
Application number: CN202321802319.7U
Authority: CN
Inventors: 邓财科; 李航
Original assignee: Foshan Xiaoxiong Health Electrical Appliance Co ltd
Current assignee: Foshan Xiaoxiong Health Electrical Appliance Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2023-12-29
Anticipated expiration: 2033-07-10

Abstract

The utility model provides a knob connection structure and an egg boiler, wherein the knob connection structure comprises: a knob cover; the knob shaft is arranged in the knob cover and is used for being connected with the rotating shaft; the first limit structure is arranged on the knob cover and is used for being in limit connection with the shell. The first limit structure on the knob cover is in limit connection with the shell, so that the knob and the encoder are not separated when the connection structure between the knob shaft and the rotating shaft fails due to expansion caused by heat and contraction caused by cold, namely, the knob shaft and the rotating shaft are not separated due to expansion caused by heat and contraction caused by cold, and the safety is high.

Description

Knob connection structure and egg boiler

Technical Field

The utility model relates to the technical field of knob connecting structures, in particular to a knob connecting structure and an egg boiler.

Background

The knob is a common structure for adjusting in the existing electrical equipment, and the knob and the structure (rotating shaft) to be adjusted are installed in a tight fit mode. Such as an encoder provided in an egg boiler, the rotation shaft of the encoder extends outwardly through the housing of the egg boiler when assembled, and the rotation shaft is inserted onto a knob provided on the outside of the housing, with the two being a tight fit. In use, the rotary shaft of the encoder is rotated by the knob to reduce the adjusting torque of the encoder. However, the knob is deformed to a certain extent due to expansion with heat and contraction with cold when the external temperature changes, so that the tightly matched knob and the rotating shaft have the risk of loosening and separating when in use.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a knob connecting structure, wherein a knob is connected with a shell through a knob cover, so that the phenomenon of separation between a knob shaft and an encoder rotating shaft due to thermal expansion and cold contraction can not occur.

A second object of the present utility model is to provide an egg boiler, in which the encoder and the knob are firmly assembled, with high safety.

The embodiment of the utility model is realized by the following technical scheme:

a knob connection structure, comprising: a knob cover; the knob shaft is arranged in the knob cover and is used for being connected with the rotating shaft; the first limit structure is arranged on the knob cover and is used for being in limit connection with the shell.

According to a preferred embodiment, at least two first limit structures are arranged at intervals along the circumference of the knob cover.

According to a preferred embodiment, a through hole is formed in the casing in a penetrating manner, and the rotating shaft penetrates through the through hole and extends out of the casing; the first limiting structure comprises an elastic sheet arranged on one side, close to the shell, of the knob cover, the elastic sheet extends towards the shell, and at least part of the elastic sheet extends into the through hole; the elastic piece is provided with a hook part, at least part of the hook part extends outwards along the radial direction of the through hole, a limit groove is formed between the hook part and the knob cover, and the shell is embedded in the limit groove.

According to a preferred embodiment, the inner wall edge of the through hole facing the knob cover end is provided with an assembly chamfer, and the hooking part is provided with an assembly surface matching with the assembly chamfer facing the housing end.

According to a preferred embodiment, an assembly hole is formed in the end face, facing the shell, of the knob shaft, and the rotating shaft is inserted into the assembly hole; the bottom medial surface of pilot hole is provided with spacing post, spacing post butt to the knob axle.

According to a preferred embodiment, a first limit plane is arranged on the peripheral side surface of the rotating shaft; a second limiting plane matched with the first limiting plane is arranged on the inner side wall of the assembly hole; when the rotating shaft is inserted into the assembly hole, the first limiting plane is attached to the second limiting plane.

According to a preferred embodiment, the inner wall of the assembly hole is provided with a limiting rib, and the second limiting plane is arranged on the limiting rib.

According to a preferred embodiment, one end of the limiting rib facing the machine shell is provided with a guiding surface, and the guiding surface is obliquely arranged facing the limiting column.

According to a preferred embodiment, the guide surface is smoothly transitioned to the second limit plane.

The utility model provides an egg boiler, includes casing, encoder and foretell knob connection structure, the encoder set up in the casing, the pivot of encoder passes the casing extends to outside the casing, the knob hub connection to the pivot.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

the first limit structure on the knob cover is in limit connection with the shell, so that the knob and the encoder are not separated when the connection structure between the knob shaft and the rotating shaft fails due to expansion caused by heat and contraction caused by cold, namely, the knob shaft and the rotating shaft are not separated due to expansion caused by heat and contraction caused by cold, and the safety is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a knob connection structure according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a knob connection structure according to an embodiment of the present utility model;

fig. 3 is a schematic perspective view of a housing and a knob of an egg boiler according to an embodiment of the present utility model.

Icon: 100. a circuit board; 200. an encoder; 201. a rotating shaft; 2011. the first limiting plane; 300. a housing; 301. a through hole; 302. assembling and chamfering; 400. a knob cover; 401. a knob shaft; 402. a fitting hole; 403. a limit column; 404. a limit rib; 4041. the second limit plane; 4042. a guide surface; 405. an elastic sheet; 406. a hooking part; 4061. a mounting surface; 407. and a limit groove.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Referring to fig. 1 to 3, a knob connection structure is applied to an egg boiler, and is particularly used for adjusting an encoder 200 in the egg boiler. The knob connecting structure comprises a knob cover 400, a knob shaft 401 and a first limiting structure, wherein the knob shaft 401 is arranged in the knob cover 400 and is used for being connected with the rotating shaft 201; the first limiting structure is disposed on the knob cover 400 and is used for limiting connection with the casing 300. In use, turning the knob cover 400 causes the knob shaft 401 to turn, thereby driving the rotary shaft 201 coupled thereto to rotate to effect adjustment of the encoder 200. In this embodiment, the first limiting structure on the knob cover 400 is in limiting connection with the casing 300, so that the knob and the encoder 200 are not separated when the connecting structure between the knob shaft 401 and the rotating shaft 201 fails due to thermal expansion and cold contraction, that is, the knob shaft 401 and the rotating shaft 201 are not separated due to thermal expansion and cold contraction, and the safety is high.

Further, at least two first limiting structures are disposed at intervals along the circumferential direction of the knob cover 400. The at least two first limiting structures ensure the connection strength between the knob cover 400 and the cabinet 300, further improving the stability of the assembly of the knob and the encoder 200. In this embodiment, the number of the first limiting structures is three. In other embodiments, the number of the first limiting structures may be set as required, and is not particularly limited herein.

As shown in fig. 1 and 2, specifically, a through hole 301 is formed in the casing 300, and the rotation shaft 201 extends out of the casing 300 through the through hole 301; the first limiting structure comprises an elastic piece 405 arranged on one side of the knob cover 400 close to the casing 300, the elastic piece 405 extends towards the casing 300, and the elastic piece 405 at least partially extends into the through hole 301; the elastic piece 405 is provided with a hook portion 406, the hook portion 406 extends outwards along the radial direction of the through hole 301 at least partially, a limit groove 407 is formed between the hook portion 406 and the knob cover 400, and the casing 300 is embedded in the limit groove 407. When the knob is used, namely the knob cover 400 is driven towards the machine shell 300, when the hooking part 406 abuts against the inner wall of the through hole 301, the knob cover 400 is continuously moved towards the machine shell 300, the inner wall of the through hole 301 applies an inward acting force along the radial direction of the through hole 301 to the hooking part 406, at the moment, the elastic sheet 405 is elastically bent and deformed, so that the hooking part 406 can smoothly pass through the through hole 301, after the hooking part 406 passes through the through hole 301, the hooking part 406 is separated from contact with the inner wall of the through hole 301, and the elastic sheet 405 is reset, so that the machine shell 300 can be clamped and limited into the limiting groove 407, and limiting connection of the knob cover 400 and the machine shell 300 is realized.

It should be noted that, a gap is formed between the inner wall of the through hole 301 and the bottom of the limit slot 407, so that the rotation of the knob is not affected. Further, the width of the limit slot 407 is slightly larger than the thickness of the casing 300, so as to prevent friction between the casing 300 and the side wall of the limit slot 407, and influence the knob rotation.

In this embodiment, the first limiting structure and the knob cover 400 are integrally injection molded.

In this embodiment, in order to facilitate the first limiting structure to be assembled into the through hole 301, an inner wall edge of the through hole 301 facing the end of the knob cover 400 is provided with an assembling chamfer 302, and the hook portion 406 facing the end of the housing 300 is provided with an assembling surface 4061 adapted to the assembling chamfer 302. Alternatively, the fitting chamfer 302 may be rounded or square to increase the inner diameter of the inlet end of the through bore 301. As shown in fig. 1 and 2, optionally, the mounting surface 4061 is beveled and/or rounded and is adapted to fit the mounting chamfer 302.

In this embodiment, an assembly hole 402 is formed on the end face of the knob shaft 401 facing the casing 300, and the rotating shaft 201 is inserted into the assembly hole 402; the bottom inner side of the assembly hole 402 is provided with a limit post 403, and the limit post 403 abuts against the knob shaft 401. Alternatively, the shaft 201 is a tight fit with the fitting hole 402. The limiting post 403 is used to limit the insertion depth of the spindle 201 in the mounting hole 402. Specifically, when the limit post 403 abuts against the rotating shaft 201, the housing 300 is located in the limit slot 407.

As shown in fig. 3, a first limit plane 2011 is disposed on a peripheral side surface of the rotating shaft 201; a second limiting plane 4041 matched with the first limiting plane 2011 is arranged on the inner side wall of the assembly hole 402; when the rotating shaft 201 is inserted into the assembly hole 402, the first limiting plane 2011 is attached to the second limiting plane 4041. The first limiting plane 2011 cooperates with the second limiting plane 4041 to limit the knob in the circumferential direction of the rotating shaft 201, so that the knob can drive the rotating shaft 201 when rotating.

Further, a limiting rib 404 is disposed on an inner wall of the assembly hole 402, and a second limiting plane 4041 is disposed on the limiting rib 404. Alternatively, the stop bar 404 may be multiple. The limiting ribs 404 are used for limiting the rotating shaft 201 in the radial direction of the rotating shaft 201, and can improve the structural strength of the knob shaft 401.

Further, a guiding surface 4042 is provided at an end of the limiting rib 404 facing the casing 300, and the guiding surface 4042 is inclined toward the limiting post 403. The guide surface 4042 may be an arcuate surface or a beveled surface. The guide surface 4042 here facilitates insertion of the spindle 201 into the mounting hole 402.

In this embodiment, the guiding surface 4042 and the second limiting surface 4041 are in smooth transition. The rotation shaft 201 can slide smoothly from the guiding surface 4042 to the second limiting plane 4041.

The embodiment also provides an egg boiler, which comprises the casing 300, the encoder 200 and the knob connecting structure, wherein the encoder 200 is arranged in the casing 300, specifically, the encoder 200 is welded on the circuit board 100 arranged in the casing 300, the rotating shaft 201 of the encoder 200 extends to the outside of the casing 300 through the casing 300, and the knob shaft 401 is connected to the rotating shaft 201. The knob of the egg boiler has high stability and is not easy to separate from the encoder 200.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A knob connecting structure, characterized by comprising:

a knob cover (400);

a knob shaft (401) arranged in the knob cover (400) and used for being connected with the rotating shaft (201);

the first limiting structure is arranged on the knob cover (400) and is used for limiting and connecting with the shell (300).

2. The knob connecting structure according to claim 1, wherein at least two of the first limit structures are arranged at intervals along the circumference of the knob cover (400).

3. The knob connecting structure according to claim 2, wherein a through hole (301) is provided in the casing (300) therethrough, and the rotation shaft (201) extends to the outside of the casing (300) through the through hole (301);

the first limiting structure comprises an elastic sheet (405) arranged on one side, close to the machine shell (300), of the knob cover (400), the elastic sheet (405) extends towards the machine shell (300), and the elastic sheet (405) at least partially extends into the through hole (301);

the elastic piece (405) is provided with a hooking part (406), the hooking part (406) extends outwards at least partially along the radial direction of the through hole (301), a limit groove (407) is formed between the hooking part (406) and the knob cover (400), and the shell (300) is embedded in the limit groove (407).

4. A knob connecting structure according to claim 3, wherein the inner wall edge of the through hole (301) facing the knob cover (400) end is provided with an assembling chamfer (302), and the hooking portion (406) facing the housing (300) end is provided with an assembling face (4061) adapted to the assembling chamfer (302).

5. The knob connecting structure according to claim 1, wherein an assembling hole (402) is formed on an end surface of the knob shaft (401) facing the casing (300), and the rotating shaft (201) is inserted into the assembling hole (402);

the bottom inner side surface of the assembly hole (402) is provided with a limit column (403), and the limit column (403) is abutted to the knob shaft (401).

6. The knob connecting structure according to claim 5, wherein a first limit plane (2011) is provided on a peripheral side surface of the rotation shaft (201);

a second limiting plane (4041) matched with the first limiting plane (2011) is arranged on the inner side wall of the assembly hole (402);

when the rotating shaft (201) is inserted into the assembly hole (402), the first limiting plane (2011) is attached to the second limiting plane (4041).

7. The knob connecting structure according to claim 6, wherein the inner wall of the assembly hole (402) is provided with a limit rib (404), and the second limit plane (4041) is disposed on the limit rib (404).

8. The knob connecting structure according to claim 7, wherein one end of the limit rib (404) facing the casing (300) is provided with a guide surface (4042), and the guide surface (4042) is inclined toward the limit post (403).

9. The knob connecting structure according to claim 8, wherein the guiding surface (4042) is smoothly transitioned with the second limiting plane (4041).

10. An egg boiler, characterized by comprising a housing (300), an encoder (200) and a knob connection structure according to any of claims 1-9, wherein the encoder (200) is arranged in the housing (300), a rotation shaft (201) of the encoder (200) extends out of the housing (300) through the housing (300), and the knob shaft (401) is connected to the rotation shaft (201).