CN214254226U

CN214254226U - Knob assembly and electronic equipment

Info

Publication number: CN214254226U
Application number: CN202120513866.8U
Authority: CN
Inventors: 文周刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-09-21
Anticipated expiration: 2031-03-11

Abstract

The application relates to the technical field of knobs and discloses a knob assembly and an electronic device. The knob assembly includes: a mounting seat; a magnetically encoded sensor; the knob and the magnetic coding sensor are arranged on the mounting seat at intervals and can rotate or move along the axial direction of the knob under the action of external force relative to the mounting seat; wherein, the knob is provided with the magnetic element near the one end of magnetic encoding sensor. Through the mode, the rotation and key functions of the knob assembly can be realized.

Description

Knob assembly and electronic equipment

Technical Field

The present application relates to a knob technical field, in particular, to a knob assembly and an electronic device.

Background

The electronic device is provided with a knob assembly, and the knob assembly is usually rotated to control the resistance value of a resistor in the knob to generate a corresponding control signal, so that the electronic device responds based on the control signal.

Therefore, the knob assembly has a complex structure and a single function.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a knob assembly and an electronic device, which can realize rotation and key functions of the knob assembly.

A technical scheme that this application adopted provides a knob subassembly, and this knob subassembly includes: a mounting seat; a magnetically encoded sensor; the knob and the magnetic coding sensor are arranged on the mounting seat at intervals and can rotate or move along the axial direction of the knob under the action of external force relative to the mounting seat; wherein, the knob is provided with the magnetic element near the one end of magnetic encoding sensor.

Wherein, the knob comprises a main body part and an extension part; one end of the extension part is arranged on the main body part, and the other end of the extension part is provided with a magnetic element; wherein, the main part is provided with a groove, and one end of the extension part is arranged in the groove.

Wherein, the mounting seat is provided with a through hole, and the extension part is arranged in the through hole in a penetrating way, so that the magnetic element and the magnetic coding sensor are arranged at intervals.

The knob assembly further comprises a limiting nut, a spring and a clamping ring; the limiting nut is arranged on one side of the through hole, which is far away from the magnetic coding sensor, and the extending part penetrates through the limiting nut and the through hole; the spring is arranged in the through hole; wherein the extension part is arranged through the spring; the clamping ring is arranged on the extension part close to the magnetic element; the outer diameter of the clamping ring is larger than that of the through hole.

Wherein, the magnetic element is a magnet and is cylindrical; the first bottom surface of the magnetic element is arranged at one end, close to the magnetic coding sensor, of the knob, and the second bottom surface of the magnetic element faces the magnetic coding sensor; the N pole and the S pole of the magnetic element are distributed on two sides of the axial section of the magnetic element.

Wherein, one end of the knob close to the magnetic element is provided with an arc groove; the knob assembly further comprises a buckle, and the buckle comprises a first side wall, a second side wall, a third side wall and a fourth side wall; the first side wall and the third side wall are arranged oppositely, and the second side wall and the fourth side wall are arranged oppositely to form an accommodating space; the second side wall and the fourth side wall are provided with button elastic pieces which can slide into or out of the arc-shaped groove in the axial movement stroke of the knob; the mounting seat comprises a first extension part, a second extension part and a base, and the first extension part and the second extension part are oppositely arranged on two sides of the base; the first extending part is attached to the inner side of the first side wall, and the second extending part is attached to the inner side of the third side wall and is contained in the containing space; wherein, the magnetic coding sensor is arranged between the buckle and the mounting seat.

Wherein, the first side wall is provided with a first opening and the third side wall is provided with a second opening; a first bulge part is arranged on the outer side of the first extension part, and a second bulge part is arranged on the outer side of the second extension part; the outer side of the first extending portion is attached to the inner side of the first side wall, the first protruding portion is arranged at the first opening, the outer side of the second extending portion is attached to the inner side of the third side wall, and the second protruding portion is arranged at the second opening.

Wherein the second side wall is provided with a third opening and the fourth side wall is provided with a fourth opening; the first side surface of the base is provided with a third boss, and the second side surface of the base is provided with a fourth boss; the first side surface of the base is attached to the inner side of the second side wall, the third protruding portion is arranged at the third opening, the second side surface of the base is attached to the inner side of the fourth side wall, and the fourth protruding portion is arranged at the fourth opening.

Wherein, the first side wall is provided with a first bending part, the second side wall is provided with a second bending part, the third side wall is provided with a third bending part, and the fourth side wall is provided with a fourth bending part; a first sunken part is arranged on the outer side of the first extending part, a second sunken part is arranged on the outer side of the second extending part, a third sunken part is arranged on the first side surface of the base, and a fourth sunken part is arranged on the second side surface of the base; the outer side of the first extending portion is attached to the inner side of the first side wall, the first bending portion is arranged on the first concave portion, the outer side of the second extending portion is attached to the inner side of the third side wall, the third bending portion is arranged on the second concave portion, the first side face of the base is attached to the inner side of the second side wall, the second bending portion is arranged on the third concave portion, the second side face of the base is attached to the inner side of the fourth side wall, and the fourth bending portion is arranged on the fourth concave portion.

One technical solution adopted by the present application is to provide an electronic device, which includes the knob assembly provided in the above technical solution.

The beneficial effect of this application is: different from the prior art, the rotary knob assembly of the application utilizes the magnetic coding sensor to identify the rotation angle of the magnetic element, and identifies that the rotary knob is pressed according to the magnetic field intensity change when the rotary knob moves along the axial direction, so that the rotation and key function of the rotary knob assembly can be realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic structural diagram of one embodiment of a knob assembly provided herein;

FIG. 2 is a schematic structural diagram of an embodiment of a knob provided herein;

FIG. 3 is a schematic structural view of an embodiment of a mount provided herein;

FIG. 4 is a schematic cross-sectional view of FIG. 1 provided herein;

FIG. 5 is a schematic structural view of another embodiment of a knob assembly provided herein;

FIG. 6 is a schematic cross-sectional structure of FIG. 5 provided herein;

FIG. 7 is an exploded schematic view of another embodiment of a knob assembly provided herein;

FIG. 8 is a schematic structural view of the present application according to FIG. 7;

FIG. 9 is a cross-sectional view of FIG. 8 as provided herein;

FIG. 10 is an exploded schematic view of another embodiment of a knob assembly provided herein;

FIG. 11 is a schematic structural view of the present application according to FIG. 10;

FIG. 12 is a cross-sectional view of FIG. 11 as provided herein;

FIG. 13 is an exploded schematic view of another embodiment of a knob assembly provided herein;

FIG. 14 is a schematic structural view of the assembly provided herein according to FIG. 13;

FIG. 15 is a cross-sectional view of FIG. 14 as provided herein;

fig. 16 is a schematic structural diagram of an embodiment of an electronic device provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a knob assembly provided in the present application. The knob assembly 100 includes a mount 10, a magnetically encoded sensor 20, a knob 30, and a magnetic element 40.

The knob 30 and the magnetic encoding sensor 20 are arranged on the mounting base 10 at intervals, and can rotate or move along the axial direction of the knob 30 relative to the mounting base 10 under the action of external force; wherein, one end of the knob 30 close to the magnetic encoding sensor 20 is provided with a magnetic element 40.

In an application scenario, because the magnetic element 40 is disposed at one end of the knob close to the magnetic encoding sensor 20, when the knob 30 rotates under the action of an external force, the magnetic element 40 can be driven to rotate, the magnetic encoding sensor 20 can identify the rotation angle of the magnetic element 40, when the knob 30 moves along the axial direction of the knob 30 under the action of the external force, the magnetic element 40 can be driven to close to the magnetic encoding sensor 20, and the magnetic encoding sensor 20 can identify the pressing action according to the detected magnetic field intensity change.

When the knob assembly is used for the earphone, the output volume of the earphone can be adjusted through rotation of the knob, and played music can be paused or played or switched through pressing of the knob.

When the knob assembly is used for the washing machine, the washing gear of the washing machine can be adjusted by rotating the knob, and the work of the washing machine can be paused or started by pressing the knob.

When the knob assembly is used for a television, the volume of the television can be adjusted by rotating the knob, and the channels of the television can be switched or paused by pressing the knob.

Specifically, referring to fig. 2, 3 and 4, the knob 30 includes a main body portion 31 and an extension portion 32. One end of the extension portion 32 is provided on the body portion 31, and the other end of the extension portion 32 is provided with a magnetic element 40.

The mounting seat 10 is provided with a through hole 11 and a first extension portion 12 and a second extension portion 13, and the first extension portion 12 and the second extension portion 13 are arranged at an interval. 32 are inserted into the through hole 11, and the magnetic element 40 and the magnetic encoder sensor 20 are disposed at an interval, and the magnetic encoder sensor 20 is disposed in the first extension portion 12 and the second extension portion 13.

The knob assembly 100 further comprises a spring 60 and a snap ring 70, wherein the spring 60 is arranged in the through hole 11; with extension 32 extending through spring 60. A snap ring 70 is provided adjacent to the magnetic element 40 to the extension 32, wherein the snap ring 70 has an outer diameter larger than the diameter of the through hole 11. The distance at which the magnetic element 40 is spaced from the magnetic encoder sensor 20 is controlled by the snap ring 70.

Specifically, the first end and the second end area of the through-hole 11 are different. The area of the first end is smaller than the area of the second end, the first end being adjacent to the magnetic element 40. Because the area of the first end close to the magnetic element 40 is small, the spring 60 can be limited, and the spring 60 deforms in the through hole.

Specifically, the extension 32 includes a first extension 321 and a second extension 322. The first and

second extensions

321 and 322 are cylindrical. An end of the second extension 322 near the magnetic element 40 is provided with an arc-shaped groove 323. The first extension 321 has a diameter greater than a diameter of the second extension 322. The second extension 322 is inserted through the spring 60. The first extension 321 has a diameter greater than that of the spring 60. Thus, the spring is confined within the through hole by the first end of the through hole 11 and the first extension 321. The magnetic element 40 is provided on the second extension portion 322, and the first extension portion 321 is connected to the main body portion 31. The second end of the through hole 11 is engaged with the first extension 321, and the first end of the through hole 11 is engaged with the second extension 322.

In the present embodiment, the rotation angle of the magnetic element 40 can be identified by the magnetic encoding sensor 20, and the knob 30 can be identified to be pressed according to the variation of the magnetic field intensity when the knob 30 moves in the axial direction, so that the rotation and key functions of the knob assembly 100 can be realized.

In other embodiments, referring to fig. 5 and 6, the knob assembly 100 includes a mount 10, a magnetic encoding sensor 20, a knob 30, a magnetic element 40, a limit nut 50, a spring 60, and a snap ring 70.

The limit nut 50 is disposed on a side of the through hole 11 away from the magnetic encoding sensor 20, and the extension portion 32 penetrates through the limit nut 50 and the through hole 11. By arranging the limit nut 50, the moving distance of the knob 30 during pressing can be controlled, and the phenomenon that the magnetic element 40 collides with the magnetic coding sensor 20 due to overlarge acting force during pressing is avoided. The main body 31 and the extension 32 are detachably connected, the main body 31 is provided with a groove 311, and one end of the extension 32 is arranged in the groove 311. The other end of the extension 32 is provided with an arcuate groove 323, the arcuate groove 323 being adjacent the magnetic element 40.

Wherein, the magnetic element 40 is a magnet, and the magnetic element 40 is cylindrical; wherein, the first bottom surface of the magnetic element 40 is arranged at one end of the knob 30 close to the magnetic encoding sensor 20, and the second bottom surface of the magnetic element faces the magnetic encoding sensor 20; the N and S poles of the magnetic element 40 are distributed on both sides of the axial cross section of the magnetic element.

The rest of the mounting seat 10, the magnetic encoder sensor 20, the knob 30, the magnetic element 40, the spring 60 and the snap ring 70 are arranged according to the above-mentioned embodiment, and are not described in detail herein.

In this way, the magnetic encoding sensor 20 can be used to identify the rotation angle of the magnetic element 40, and identify that the knob 30 is pressed according to the magnetic field intensity change when the knob 30 moves in the axial direction, so as to realize the rotation and key functions of the knob assembly 100.

Referring to fig. 7-9, fig. 7 is an exploded view of another embodiment of a knob assembly provided herein; FIG. 8 is a schematic structural view of the present application according to FIG. 7; fig. 9 is a schematic cross-sectional view of fig. 8 provided herein. The knob assembly 100 includes a mount 10, a magnetic encoding sensor 20, a knob 30, a magnetic element 40, a spring 60, a snap ring 70, and a catch 80. An end of the knob 30 adjacent to the magnetic member 40 is provided with an arc-shaped groove 323.

The catch 80 comprises a first side wall 81, a second side wall 82, a third side wall 83 and a fourth side wall 84; the first sidewall 81 and the third sidewall 83 are disposed opposite to each other, and the second sidewall 82 and the fourth sidewall 84 are disposed opposite to each other to form an accommodating space. The second side wall 82 and the fourth side wall 84 are respectively provided with a button spring 823 and a button spring 843, and the button spring 823 and the button spring 843 can slide into or out of the arc-shaped groove 323 in the axial movement stroke of the knob 30. The button feel is generated by the button dome 823 and the button dome 843 sliding into or out of the arc-shaped groove 323 within the axial movement stroke of the knob 30.

The mounting seat 10 comprises a first extending part 12, a second extending part 13 and a base 14, wherein the first extending part 12 and the second extending part 13 are oppositely arranged on two sides of the base 14; the first extending portion 12 is attached to the inner side of the first sidewall 81, and the second extending portion 13 is attached to the inner side of the third sidewall 83 and is accommodated in the accommodating space; wherein, the magnetic encoding sensor 20 is disposed between the buckle 80 and the mounting seat 10. The base 14 is provided with a through hole 11.

Wherein, the first sidewall 81 is provided with a first opening 811 and the third sidewall 83 is provided with a second opening 831; a first convex part 121 is arranged on the outer side of the first extending part 12, and a second convex part 131 is arranged on the outer side of the second extending part 13; the outer side of the first extending portion 12 is attached to the inner side of the first sidewall 81, the first protrusion 121 is disposed in the first opening 811, the outer side of the second extending portion 13 is attached to the inner side of the third sidewall 83, and the second protrusion 131 is disposed in the second opening 831.

In the present embodiment, by the above manner, the outer side of the first extending portion 12 is attached to the inner side of the first sidewall 81, the first protruding portion 121 is disposed in the first opening 811, the outer side of the second extending portion 13 is attached to the inner side of the third sidewall 83, and the second protruding portion 131 is disposed in the second opening 831, so that the production difficulty of the knob assembly 100 can be simplified, the production cost of the knob assembly 100 can be reduced, and the knob assembly is more suitable for mass production.

Referring to fig. 10-12, fig. 10 is an exploded view of another embodiment of a knob assembly provided herein; FIG. 11 is a schematic structural view of the present application according to FIG. 10; fig. 12 is a schematic cross-sectional view of fig. 11 provided herein. The knob assembly 100 includes a mount 10, a magnetic encoding sensor 20, a knob 30, a magnetic element 40, a spring 60, a snap ring 70, and a catch 80. An end of the knob 30 adjacent to the magnetic member 40 is provided with an arc-shaped groove 323.

The catch 80 comprises a first side wall 81, a second side wall 82, a third side wall 83 and a fourth side wall 84; the first sidewall 81 and the third sidewall 83 are disposed opposite to each other, and the second sidewall 82 and the fourth sidewall 84 are disposed opposite to each other to form an accommodating space.

Wherein, the first sidewall 81 is provided with a first bending portion 812, the second sidewall 82 is provided with a second bending portion 821, the third sidewall 83 is provided with a third bending portion 832, and the fourth sidewall 84 is provided with a fourth bending portion 841; a first concave part 122 is arranged on the outer side of the first extending part 12, a second concave part 132 is arranged on the outer side of the second extending part 13, a third concave part 141 is arranged on the first side surface of the base 14, and a fourth concave part 142 is arranged on the second side surface of the base 14; the outer side of the first extending portion 12 is attached to the inner side of the first sidewall 81, the first bending portion 812 is disposed in the first recess 122, the outer side of the second extending portion 13 is attached to the inner side of the third sidewall 83, the third bending portion 832 is disposed in the second recess 132, the first side of the base 14 is attached to the inner side of the second sidewall 82, the second bending portion 821 is disposed in the third recess 141, the second side of the base 14 is attached to the inner side of the fourth sidewall 84, and the fourth bending portion 841 is disposed in the fourth recess 142. The base 14 is provided with a through hole 11.

The second sidewall 82 is provided with a first hollow portion 822 and a button elastic sheet 823, and the button elastic sheet 823 is arranged in the first hollow portion 822. The fourth sidewall 84 is provided with a second hollow portion 842 and a button spring 843, and the button spring 843 is disposed in the second hollow portion 842. The button elastic sheet 823 and the button elastic sheet 843 can slide into or out of the arc-shaped groove 323 in the axial movement stroke of the knob 30 to generate key hand feeling, and user experience is improved.

In this embodiment, through the above manner, the production difficulty of the knob assembly 100 can be simplified, the production cost of the knob assembly 100 can be reduced, and the knob assembly is more suitable for mass production.

Referring to fig. 13-15, fig. 13 is an exploded view of another embodiment of a knob assembly provided herein; FIG. 14 is a schematic structural view of the assembly provided herein according to FIG. 13; fig. 15 is a schematic cross-sectional view of fig. 14 provided herein. The knob assembly 100 includes a mounting base 10, a magnetic encoding sensor 20, a knob 30, a magnetic element 40, a limit nut 50, a spring 60, a snap ring 70, and a clip 80. An end of the knob 30 adjacent to the magnetic member 40 is provided with an arc-shaped groove 323.

Wherein, the second side wall 82 is provided with a third opening 824 and the fourth side wall 84 is provided with a fourth opening 844; the first side of the base 14 is provided with a third boss 143 and the second side of the base 14 is provided with a fourth boss 144; the first side of the base 14 is attached to the inner side of the second side wall 82, the third protrusion 143 is disposed in the third opening 824, the second side of the base 14 is attached to the inner side of the fourth side wall 84, and the fourth protrusion 144 is disposed in the fourth opening 844. The base 14 is provided with a through hole 11.

In other embodiments, the third protrusion 143 and the fourth protrusion 144 are replaced by through holes, and a connecting member is disposed through the through holes, the third opening 824 and the fourth opening 844 to fixedly connect the mounting base 10 and the clip 80.

In other embodiments, the knob assembly 100 has the first opening 811, the second opening 831, the third opening 824, and the fourth opening 844 at the same time, and the first protrusion 121, the second protrusion 131, the third protrusion 143, and the fourth protrusion 144, which are correspondingly arranged according to the above structure, and are not described herein again.

In this embodiment, through the above manner, the production difficulty of the knob assembly 100 can be simplified, the knob assembly 100 is more convenient to install, the production cost of the knob assembly 100 is reduced, and the knob assembly is more suitable for mass production.

Referring to fig. 16, fig. 16 is a schematic structural diagram of an embodiment of an electronic device provided in the present application. The electronic device 200 comprises the knob assembly 100, wherein the knob assembly 100 is the knob assembly 100 in any of the above embodiments, and the rotation and key functions of the knob assembly 100 on the electronic device 200 can be realized.

The electronic device 200 may be any electronic device that includes the knob assembly 100. Such as earphones, radios, televisions, refrigerators, washing machines, cooking machines, induction cookers, and the like.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A knob assembly, characterized in that said knob assembly comprises:

a mounting seat;

a magnetically encoded sensor;

the knob and the magnetic coding sensor are arranged on the mounting seat at intervals and can rotate or move along the axial direction of the knob relative to the mounting seat under the action of external force;

and one end of the knob, which is close to the magnetic coding sensor, is provided with a magnetic element.

2. The knob assembly according to claim 1,

the knob comprises a main body part and an extension part; one end of the extension part is arranged on the main body part, and the other end of the extension part is provided with the magnetic element;

the main body part is provided with a groove, and one end of the extending part is arranged in the groove.

3. The knob assembly according to claim 2,

the mounting base is provided with a through hole, and the extension part penetrates through the through hole, so that the magnetic element and the magnetic coding sensor are arranged at intervals.

4. The knob assembly according to claim 3,

the knob assembly further comprises a limiting nut, a spring and a clamping ring;

the limiting nut is arranged on one side, away from the magnetic coding sensor, of the through hole, and the extending part penetrates through the limiting nut and the through hole;

the spring is arranged in the through hole; wherein the extension is disposed through the spring;

the clamping ring is arranged on the extension part close to the magnetic element; the outer diameter of the clamping ring is larger than the diameter of the through hole.

5. The knob assembly according to claim 1,

the magnetic element is a magnet and is cylindrical;

the first bottom surface of the magnetic element is arranged at one end, close to the magnetic coding sensor, of the knob, and the second bottom surface of the magnetic element faces the magnetic coding sensor; the N pole and the S pole of the magnetic element are distributed on two sides of the axial section of the magnetic element.

6. The knob assembly according to any one of claims 1 to 5,

an arc-shaped groove is formed in one end, close to the magnetic element, of the knob;

the knob assembly further comprises a buckle, wherein the buckle comprises a first side wall, a second side wall, a third side wall and a fourth side wall; the first side wall and the third side wall are arranged oppositely, and the second side wall and the fourth side wall are arranged oppositely to form an accommodating space; button elastic pieces are respectively arranged on the second side wall and the fourth side wall, and the button elastic pieces can slide into or out of the arc-shaped groove in the axial movement stroke of the knob;

the mounting seat comprises a first extension part, a second extension part and a base, and the first extension part and the second extension part are oppositely arranged on two sides of the base;

the first extending part is attached to the inner side of the first side wall, and the second extending part is attached to the inner side of the third side wall and is accommodated in the accommodating space;

wherein, the magnetic coding sensor is arranged between the buckle and the mounting seat.

7. The knob assembly according to claim 6,

a first opening is formed in the first side wall, and a second opening is formed in the third side wall;

a first protruding part is arranged on the outer side of the first extending part, and a second protruding part is arranged on the outer side of the second extending part;

the outside subsides of first extension portion are located the inboard of first lateral wall, just first bellying set up in first opening, the outside subsides of second extension portion are located the inboard of third lateral wall, just the second bellying set up in the second opening.

8. The knob assembly according to claim 6,

a third opening is formed in the second side wall, and a fourth opening is formed in the fourth side wall;

the first side surface of the base is provided with a third boss, and the second side surface of the base is provided with a fourth boss;

the first side surface of the base is attached to the inner side of the second side wall, the third protruding portion is arranged at the third opening, the second side surface of the base is attached to the inner side of the fourth side wall, and the fourth protruding portion is arranged at the fourth opening.

9. The knob assembly according to claim 6,

a first bent part is arranged on the first side wall, a second bent part is arranged on the second side wall, a third bent part is arranged on the third side wall, and a fourth bent part is arranged on the fourth side wall;

a first sunken part is arranged on the outer side of the first extending part, a second sunken part is arranged on the outer side of the second extending part, a third sunken part is arranged on the first side surface of the base, and a fourth sunken part is arranged on the second side surface of the base;

the outer side of the first extending portion is attached to the inner side of the first side wall, the first bending portion is arranged on the first concave portion, the outer side of the second extending portion is attached to the inner side of the third side wall, the third bending portion is arranged on the second concave portion, the first side face of the base is attached to the inner side of the second side wall, the second bending portion is arranged on the third concave portion, the second side face of the base is attached to the inner side of the fourth side wall, and the fourth bending portion is arranged on the fourth concave portion.

10. An electronic device, characterized in that the electronic device comprises a knob assembly according to any one of claims 1-9.