CN209803657U - knob subassembly and water heater - Google Patents

Abstract

the utility model discloses a knob subassembly and water heater, knob subassembly (100) include: the knob comprises a knob body (1), wherein a knob inserting part (11) is arranged at the inner end of a knob of the knob body (1); and the first circumferential knob limiting part (2), a limiting part inserting part (211) detachably matched with the knob inserting part (11) is arranged at the first end (21) of the first circumferential knob limiting part (2), and a circumferential knob limiting part (221) is formed at the second end (22) of the first circumferential knob limiting part (2). The utility model discloses a rotary knob subassembly (100) and water heater (200) can many gears select different rotation range, fail safe nature height.

Description

knob subassembly and water heater

Technical Field

The utility model relates to a knob subassembly especially indicates a knob subassembly and water heater of installing on temperature controller.

Background

The upper limit of the water outlet temperature of the water heater is generally determined by the type of the temperature controller, one type of the temperature controller corresponds to one upper limit of the temperature, the water heater of one type in the market generally corresponds to one type of the temperature controller, in other words, the water outlet temperature of the water heater of one type corresponds to only one upper limit of the temperature. When the user has different requirements to the temperature upper limit in different use scenes, the existing water heater can not meet the diversified requirements of the user. For example, when a child is at home, in order to prevent the child from scalding the child by adjusting the rotation angle of the temperature control knob to be too large and adjusting the outlet water temperature to be too high, parents expect that the upper limit of the temperature control of the water heater is lower, and the danger of the child caused by misoperation of the temperature control knob is avoided.

in addition, the existing temperature controller is generally fixed on the shell plate of the water heater through screws, and the installation and operation are complex, the production efficiency is low, and the labor cost is high.

Disclosure of Invention

The utility model aims at providing a can many gears select different rotation range, knob subassembly that fail safe nature is high.

In order to achieve the above object, the present invention provides a knob assembly, comprising: the knob comprises a knob body, wherein a knob inserting part is arranged at the inner end of a knob of the knob body; the first end of the first circumferential knob limiting part is provided with a limiting part inserting part detachably matched with the knob inserting part, and the second end of the first circumferential knob limiting part is provided with a circumferential knob limiting part.

Optionally, the limiting member insertion part and the knob insertion part can form detachable alignment insertion at least at a first circumferential insertion position or a second circumferential insertion position, so that the circumferential knob limiting part is at a corresponding first circumferential limiting initial angle and a second circumferential limiting initial angle.

Optionally, the second end of the first circumferential knob limiting part can be detachably aligned and inserted with the inner end of the knob.

Further, the knob assembly may further include a second circumferential knob limiting member engaged with the first circumferential knob limiting member, and the second circumferential knob limiting member includes a circumferential limiting end stopping the circumferential knob limiting portion at a circumferential limiting position.

In some embodiments, the inner end of the knob may be formed in a stepped shaft shape and includes a small diameter shaft section extending inward, and the first circumferential knob stopper is a sleeve member sleeved outside the small diameter shaft section; the knob inserting part is formed on a step ring surface at the inner end of the knob, the limiting part inserting part is formed on an end ring surface of the first end of the first circumferential knob limiting part, one of the knob inserting part and the limiting part inserting part is formed into an axial inserting groove, and the other one of the knob inserting part and the limiting part inserting part is formed into an axial inserting protrusion.

Further, the axial insertion protrusion may be at least one, and the axial insertion groove may be plural.

Furthermore, an end ring surface of the second end of the first circumferential knob limiting part can be formed with an axial convex circumferential knob limiting part and an axial insertion groove circumferentially spaced from the circumferential knob limiting part.

Optionally, the second circumferential knob limiting piece is an arc segment baffle.

correspondingly, the utility model also provides a water heater, water heater includes:

The temperature controller comprises a temperature controller rotating shaft which extends outwards and is used for rotatably adjusting the temperature of the outlet water;

The temperature controller is arranged on the inner side of the outer shell plate, and the rotating shaft of the temperature controller penetrates out of the outer shell plate and extends outwards; and

according to the utility model discloses foretell knob subassembly, the knob body is installed the outside of skin, the connection and the rotation control in knob the temperature controller pivot, the fixed setting of second circumference knob locating part is in the inboard of skin and with the spacing cooperation of the spacing portion of circumference knob is spacing with circumference the circumference rotation angle of knob body.

Optionally, the temperature controller includes the installation joint spare that outwards stretches out, the inboard of casing plate be formed with be used for with a plurality of calorie of stake of installation joint spare joint complex.

The utility model discloses a knob subassembly of water heater can dismantle the cooperation through increasing first circumference knob locating part and knob body, can form the rotation range of multiple cooperation mode in order to form multiple gear, can come the rotation range to transform and restriction knob subassembly according to the use scene of difference to can improve knob subassembly's fail safe nature, satisfy user's diversified demand.

other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 illustrates a knob body according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a rear view of FIG. 1;

fig. 5 illustrates a first circumferential knob stop according to an embodiment of the present invention;

FIG. 6 is a left side view of FIG. 5;

FIG. 7 illustrates an outer skin according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of the closure panel of FIG. 7 from another perspective;

FIG. 9 is an enlarged partial schematic view of FIG. 8;

fig. 10 shows a thermostat according to an embodiment of the present invention;

Fig. 11 is an assembly view illustrating the knob body of fig. 1, the first circumferential knob stopper of fig. 5, the case plate of fig. 7, and the thermostat of fig. 10, wherein the knob body is located at an initial position and a knob pointer points to a minimum scale;

FIG. 12 is an exploded view of the knob body of FIG. 1, the first circumferential knob stop of FIG. 5, the housing plate of FIG. 7 and the thermostat of FIG. 10 in a first mode of assembly;

FIG. 13 is a first mode of assembly of the knob body and the first circumferential knob stop of FIG. 12;

FIG. 14 is a first mode assembly view of the knob body, the first circumferential knob stop and the housing plate of FIG. 12, wherein the first circumferential knob stop is in an initial position of the first mode;

FIG. 15 is a first mode assembly schematic view of the knob body, the first circumferential knob stop and the housing plate of FIG. 12, wherein the knob assembly has been rotated to a first mode limit position;

FIG. 16 is a structural schematic view from another perspective of the assembled view of the first mode of FIG. 15, wherein the knob pointer points to a scale of the extreme positions of the first mode;

FIG. 17 is an exploded view of the knob body of FIG. 1, the first circumferential knob stop of FIG. 5, the housing plate of FIG. 7 and the thermostat of FIG. 10 in a second mode of assembly;

FIG. 18 is a second mode of assembly of the knob body and the first circumferential knob stop of FIG. 17;

FIG. 19 is a second mode assembly view of the knob body, the first circumferential knob stop and the housing plate of FIG. 17, wherein the first circumferential knob stop is in an initial position of the second mode;

FIG. 20 is a second mode of assembly of the knob body, the first circumferential knob stop and the housing plate of FIG. 17, wherein the knob assembly has been rotated to a second mode of extreme positions;

FIG. 21 is a structural schematic view from another perspective of the assembled view of the second mode of FIG. 20, wherein the knob pointer points to a scale of the extreme position of the second mode;

Fig. 22 is an assembled exploded view of a third mode of the knob body of fig. 1, the first circumferential knob stop of fig. 5, the housing plate of fig. 7 and the thermostat of fig. 10;

FIG. 23 is a third mode of assembly of the knob body and the first circumferential knob stop of FIG. 22;

FIG. 24 is an assembly view of the knob body, the first circumferential knob stop and the housing plate of FIG. 22 in a third mode, wherein the first circumferential knob stop is in an initial position in the third mode;

FIG. 25 is an assembled view of the third mode of FIG. 22 with the knob pointer pointing to the scale of the extreme position of the third mode;

fig. 26 is an assembly view illustrating the knob body of fig. 1, the first circumferential knob stopper of fig. 5, the housing plate of fig. 7 and the thermostat of fig. 10;

FIG. 27 is a top view of FIG. 26;

FIG. 28 is an enlarged schematic view of FIG. 27;

fig. 29 is a left side view of fig. 26.

Description of the reference numerals

100 knob assembly

1 knob body 11 knob insertion part

12 small diameter shaft section 13 knob pointer

2 first end of first circumferential knob limit piece 21

211 second end of the limiter plug-in part 22

221 circumferential knob limiting part

200 water heater

3 temperature controller 31 temperature controller rotating shaft

32 mounting clip 4 outer shell plate

41 second circumferential knob stop 42 first peg

43 second clip 44 third clip

45 fourth clip 46 fifth clip

47 sixth clip 48 seventh clip

49 eighth clip

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

The following describes a novel multi-gear knob assembly with limited rotation range and high safety and reliability according to the present invention with reference to the drawings, wherein the side close to the user is defined as "outer" and the side away from the user is defined as "inner".

As shown in fig. 1 to 6, 12, 13, 17, 18, 22 and 23, the knob assembly includes a knob body 1 and a first circumferential knob limiting member 2, a knob insertion portion 11 is disposed at an inner end of a knob of the knob body 1, a limiting member insertion portion 211 detachably engaged with the knob insertion portion 11 is disposed at a first end 21 of the first circumferential knob limiting member 2, and a circumferential knob limiting portion 221 is formed at a second end 22 of the first circumferential knob limiting member 2.

when the knob is in different use scenes, a user may want the knob to have multiple range selections, for example, when a child is at home, in order to prevent the child from turning the rotation angle of the temperature control knob too large and the temperature of the outlet water too high to cause the child to scald, parents want the upper limit of the temperature control of the water heater to be lower, and the danger of the child caused by misoperation of the temperature controller knob is avoided. However, the conventional knob usually has only one assembly method and only one fixed rotation range, and it is difficult to satisfy the diversified demands of users.

compared with the traditional knob, the utility model discloses a knob subassembly can dismantle the cooperation through increasing primary shaft axial knob locating part and knob body, can form the rotation range of multiple cooperation mode in order to form multiple gear, can come the rotation range to transform and restriction knob subassembly according to the use scene of difference to can improve knob subassembly's fail safe nature, satisfy user's diversified demand.

the knob body 1 and the first circumferential knob limiting member 2 can be detachably inserted and matched in a plurality of ways, and the rotation angle can be limited by the circumferential knob limiting portion 221 to form a plurality of different rotation ranges.

Optionally, the limiting member insertion portion 211 and the knob insertion portion 11 can form a detachable alignment insertion at least at the first circumferential insertion position or the second circumferential insertion position, so that the circumferential knob limiting portion 221 is located at the corresponding first circumferential limiting preset angle and the second circumferential limiting preset angle. As shown in fig. 1 to 6, 12, 13, 17, 18, 22 and 23, the position limiting member insertion portion 211 and the knob insertion portion 11 may form two detachable alignment insertion modes, and the two detachable alignment insertion modes may enable the circumferential knob position limiting portion 221 to be located at two different circumferential position limiting preset angles, thereby limiting the rotation angle of the knob assembly so that the knob assembly may have two different rotation ranges. Of course, the present invention is not limited thereto, the locating part inserting portion 211 and the knob inserting portion 11 can also form more detachable alignment inserting modes, so that the knob assembly can have more rotation ranges.

In some embodiments, the second end 22 of the first circumferential knob retainer 2 can be detachably aligned with the inner end of the knob. As shown in fig. 1 to 6, 22 and 23, the first circumferential knob limiting member 2 and the knob body 1 are reversely aligned and inserted to form a third alignment insertion mode, that is, the circumferential knob limiting portion 221 and the knob insertion portion 11 form a detachable alignment insertion, and at this time, the rotation angle of the rotating assembly is not limited by the circumferential knob limiting portion 221.

optionally, the knob assembly 100 further includes a second circumferential knob limiting member 41 engaged with the first circumferential knob limiting member 2, and the second circumferential knob limiting member 41 includes a circumferential limiting end stopping the circumferential knob limiting portion 221 at a circumferential limiting position. As shown in fig. 8, 9, 14, 15, 19, and 20, the second circumferential knob stopper 41 is an arc segment stopper, and one end of the arc segment stopper forms a stopper against the circumferential knob stopper 221 to limit the rotation angle of the circumferential knob stopper 221.

the second circumferential knob stopper 41 is not limited to be an arc-shaped baffle, and may be a structural member having another shape, such as an L-shaped pile, as long as it can perform a stopping and stopping function on the circumferential knob stopper 221.

Optionally, the inner end of the knob is formed into a stepped shaft shape and includes a small-diameter shaft section 12 extending inward, and the first circumferential knob limiting member 2 is a sleeve member sleeved outside the small-diameter shaft section 12; the knob inserting portion 11 is formed on a stepped ring surface at the inner end of the knob, the limiting member inserting portion 211 is formed on an end ring surface of the first end 21 of the first circumferential knob limiting member 2, one of the knob inserting portion 11 and the limiting member inserting portion 211 is formed as an axial inserting groove, and the other is formed as an axial inserting protrusion. As shown in fig. 1 to 6, 12, 13, 17, 18, 22, and 23, the knob insertion part 11 is formed as one axial insertion protrusion and one axial insertion groove that are circumferentially spaced apart, and the limiter insertion part 211 is formed as two axial insertion grooves that are circumferentially spaced apart.

the axial insertion protrusion of the knob insertion part 11 can be detachably aligned with the two axial insertion grooves of the limiting part insertion part 211 to form two alignment insertion modes. Of course, the knob insertion part 11 may also be formed as an axial insertion groove, and the position limiting member insertion part 211 may also be formed as an axial insertion protrusion.

those skilled in the art will understand that the knob insertion portion 11 may also be formed as a plurality of axial insertion protrusions, and the limiting member insertion portion 211 may also be formed as a plurality of axial insertion grooves, or alternatively, the knob insertion portion 11 may also be formed as a plurality of axial insertion grooves, and the limiting member insertion portion 211 may also be formed as a plurality of axial insertion protrusions, so that the knob insertion portion 11 and the limiting member insertion portion 211 can form a plurality of alignment insertion modes. Optionally, the number of the axial insertion protrusions is at least one, and the number of the axial insertion grooves is multiple. The axial insertion grooves and/or the axial insertion protrusions formed by the knob insertion part 11 are distributed at intervals along the circumferential direction, and the axial insertion grooves and/or the axial insertion protrusions formed by the limiting part insertion part 211 are distributed at intervals along the circumferential direction.

in some embodiments, the end ring surface of the second end 22 of the first circumferential knob stop 2 is formed with an axially convex circumferential knob stop 221 and an axially inserted groove circumferentially spaced from the circumferential knob stop 221. As shown in fig. 1 to 6, 12, 13, 17, 18, 22 and 23, the knob insertion part 11 may be detachably engaged with the limit member insertion part 211 of the first end 21 of the first circumferential knob limit member 2, and the knob insertion part 11 may be detachably engaged with the circumferential knob limit member 221 of the second end 21 of the first circumferential knob limit member 2 to form a third alignment insertion mode.

Correspondingly, as shown in fig. 1-29, the utility model also provides a water heater 200, this water heater 200 includes temperature controller 3, skin 4 and foretell knob subassembly 100, temperature controller 3 includes the temperature controller pivot 31 that is used for the rotation regulation leaving water temperature that outwards stretches out, the inboard at skin 4 is installed to temperature controller 3, skin 4 outwards stretches out is worn out in temperature controller pivot 31, the outside at skin 4 is installed to knob body 1, the knob is inner to be connected and rotation control temperature controller pivot 31, second circumference knob locating part 41 is fixed to be set up in skin 4's inboard and with the spacing portion 221 cooperation of circumference knob with the circumference rotation angle of spacing knob body 1.

In some embodiments, the temperature controller rotating shaft 31 penetrates through the outer shell plate 4 through a middle through hole of the outer shell plate 4 to extend outward, the knob body 1 is installed on the outer side of the outer shell plate 4, the first circumferential knob limiting part 2 is sleeved on the small-diameter shaft section 12 of the knob body 1 and penetrates through the outer shell plate 4 through the middle through hole of the outer shell plate 4 to extend inward. The inner side of the outer shell plate 4 is formed with an arc support plate around the middle through hole, which is engaged with the first circumferential knob limiting member 2, and the first circumferential knob limiting member 2 is supported on the arc support plate and can perform a rotational motion on the arc support plate. The end face of the arc support plate extends along the radial direction towards the arc center of the circle to form an arc segment baffle, the second circumferential knob limiting member 41 can be selected as the arc segment baffle, one end of the arc segment baffle forms a stop for the circumferential knob limiting part 221 to limit the rotation angle of the circumferential knob limiting part 221, and the arc segment baffle can be used for limiting the inward direction of the first circumferential knob limiting member 2. The second circumferential knob stopper 41 may be integrally formed with the outer shell plate 4, or may be formed by welding or the like, for example, but the present invention is not limited thereto.

In some embodiments, as shown in fig. 1 to 29, the knob body 1, the first circumferential knob stopper 2, the case plate 4 and the thermostat 3 may form three different assembly modes, respectively. In any assembly mode, as shown in fig. 11, the initial position of the knob body 1 is the position where the knob pointer points to the minimum scale.

As shown in fig. 11 to 16, in the first assembly mode, the initial position of the knob body 1 is a position where the knob pointer 13 points to the minimum scale, the initial position of the circumferential knob limiting portion 221 is located at the highest vertical position of the first circumferential knob limiting member 2, and the rotation angle of the circumferential knob limiting portion 221 when rotating from the initial position to the stopping position of the second circumferential knob limiting member 41 is about 90 ° counterclockwise, that is, the limited rotation angle between the initial position of the first circumferential knob limiting member 2 and the limiting position of the first circumferential knob limiting member is about 90 ° counterclockwise, and then the range of the knob pointer 13 is about 90 ° clockwise.

as shown in fig. 11 and 17 to 21, in the second assembly mode, the initial position of the knob body 1 is a position where the knob hand 13 points to the minimum scale, the initial position of the circumferential knob limiting portion 221 is located at a point that is far from the second circumferential knob limiting member 41 and is at the same level as the axial line of the first circumferential knob limiting member 2, and the rotation angle of the circumferential knob limiting portion 221 when rotating from the initial position to the stopping position of the second circumferential knob limiting member 41 is about 180 ° counterclockwise, that is, the limited rotation angle between the initial position of the first circumferential knob limiting member 2 and the limiting position of the first circumferential knob limiting member is about 180 ° counterclockwise, and then the range of the knob hand 13 is about 180 ° clockwise at this time.

As shown in fig. 11 and 22 to 25, in the third assembly mode, the initial position of the knob body 1 is a position where the knob pointer 13 points to the minimum scale, and there is no circumferential limit between the first circumferential knob stopper 2 and the second circumferential knob stopper 41, and at this time, the range of the knob pointer 13 is the range of the temperature controller 3 itself.

It can be understood by those skilled in the art that the knob assembly or the water heater 200 of the present invention is not limited to the three rotation ranges, and the setting of the rotation ranges can be realized by setting different alignment insertion positions of the knob body 1 and the first circumferential knob limiting member 2. Of course, the utility model discloses a knob subassembly is not restricted to using on the water heater, can also use for example for various instrument equipment or domestic appliance on in order to realize the selection of multirange, satisfies user's diversified demand.

in the structure of the electric water heater with a mechanical panel control box on the market at present, the temperature controller is generally fixed on the shell by two screws. Therefore, production line workers are required to perform complicated installation operation, and the production efficiency is not high.

in some embodiments, in order to simplify the installation of the thermostat 3 and improve the production efficiency, the thermostat 3 includes an outward extending installation clamping member 32, and a plurality of clamping studs for clamping-fitting with the installation clamping member 32 are formed on the inner side of the outer casing plate 4.

Alternatively, as shown in fig. 8 to 10 and 26 to 29, two plates extending inward from the inner side wall of the thermostat 3 and parallel to the inner side wall of the thermostat 3 form two mounting fasteners 32, and the two mounting fasteners 32 are symmetrically arranged around the thermostat rotating shaft 31. Eight clamping piles are formed on the inner side of the outer shell plate 4, wherein the third clamping pile 44 is used for limiting the degree of freedom of the temperature controller 3 in the upward direction, the second clamping pile 43, the fourth clamping pile 45, the sixth clamping pile 47 and the eighth clamping pile 49 are used for limiting the degree of freedom of the temperature controller 3 in the left and right directions, the first clamping pile 42, the third clamping pile 44, the fifth clamping pile 46 and the seventh clamping pile 48 are used for limiting the degree of freedom of the temperature controller 3 in the forward direction, and the screw-free clamping installation of the temperature controller 3 can be realized by the limitation of the installation space of the temperature controller 3, so that the production efficiency is greatly improved.

to sum up, the utility model provides a knob subassembly and water heater can dismantle the cooperation through increasing first circumference knob locating part and knob body, can form the rotation range of multiple cooperation mode in order to form multiple gear, can come the rotation range to transform and restriction knob subassembly according to the use scene of difference to can improve knob subassembly's fail safe nature, satisfy user's diversified demand. In addition, the water heater 200 can be installed without screws by the clamping piles of the outer shell plate 4 and the clamping position of the installation clamping piece 32 of the temperature controller 3, thereby simplifying the operation and greatly improving the production efficiency.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A knob assembly, characterized in that the knob assembly (100) comprises:

The knob comprises a knob body (1), wherein a knob inserting part (11) is arranged at the inner end of a knob of the knob body (1); and

The first circumferential knob limiting part (2), the first end (21) of the first circumferential knob limiting part (2) is provided with a limiting part inserting part (211) detachably matched with the knob inserting part (11), and the second end (22) of the first circumferential knob limiting part (2) is provided with a circumferential knob limiting part (221).

2. the knob assembly according to claim 1, wherein the retainer plug-in part (211) and the knob plug-in part (11) are detachably connected in an aligned manner at least at a first circumferential plug-in position or a second circumferential plug-in position, so that the circumferential knob retainer part (221) is at a corresponding first circumferential retainer preset angle and a second circumferential retainer preset angle.

3. The knob assembly according to claim 1, characterized in that said second end (22) of said first circumferential knob stop (2) is removably insertable in alignment with said inner knob end.

4. The knob assembly according to any one of claims 1 to 3, wherein the knob assembly (100) further comprises a second circumferential knob stop (41) cooperating with the first circumferential knob stop (2), the second circumferential knob stop (41) comprising a circumferential stop end for stopping the circumferential knob stop (221) at a circumferential stop position.

5. The knob assembly according to claim 4, wherein the inner end of the knob is formed in a stepped shaft shape and includes a small diameter shaft section (12) protruding inward, and the first circumferential knob stopper (2) is a sleeve member fitted over the small diameter shaft section (12);

the knob inserting part (11) is formed on a step ring surface at the inner end of the knob, the limiting part inserting part (211) is formed on an end ring surface of the first end (21) of the first circumferential knob limiting part (2), one of the knob inserting part (11) and the limiting part inserting part (211) is formed into an axial inserting groove, and the other is formed into an axial inserting protrusion.

6. The knob assembly according to claim 5, wherein the axial insertion protrusion is at least one and the axial insertion groove is plural.

7. The knob assembly according to claim 5, characterized in that an end ring surface of the second end (22) of the first circumferential knob stop (2) is formed with the circumferential knob stop portion (221) in an axially convex shape and an axial insertion groove circumferentially spaced from the circumferential knob stop portion (221).

8. The knob assembly according to claim 4, wherein the second circumferential knob stop (41) is a circle segment stop.

9. A water heater, characterized in that the water heater (200) comprises:

The temperature controller (3) comprises a temperature controller rotating shaft (31) which extends outwards and is used for rotatably adjusting the temperature of the outlet water;

The temperature controller is characterized by comprising a shell plate (4), the temperature controller (3) is installed on the inner side of the shell plate (4), and a rotating shaft (31) of the temperature controller penetrates through the shell plate (4) and extends outwards; and

The knob assembly (100) according to any one of claims 4 to 8, wherein the knob body (1) is mounted on an outer side of the outer shell plate (4), an inner end of the knob is connected to and rotationally controls the temperature controller rotating shaft (31), and the second circumferential knob limiting member (41) is fixedly disposed on an inner side of the outer shell plate (4) and is matched with the circumferential knob limiting portion (221) to circumferentially limit a circumferential rotation angle of the knob body (1).

10. The water heater according to claim 9, wherein the temperature controller (3) comprises an outward extending mounting clip (32), and a plurality of clip posts for clip fitting with the mounting clip (32) are formed on the inner side of the outer shell (4).