CN212010818U

CN212010818U - Knob and cooking appliance

Info

Publication number: CN212010818U
Application number: CN201922496998.XU
Authority: CN
Inventors: 吴志聪; 顾赫鑫; 董之润; 邹开宇
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-24
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a household electrical appliances field discloses a knob and cooking appliance, the knob includes outside cover spare and inside chipware, be formed with accommodation hole (10) that link up in the outside cover spare, inside chipware is formed with and is used for stretching into the accommodation hole stretch into axle (20), the internal surface of accommodation hole (10) with the surface of stretching into axle (20) is formed with the joint structure jointly, so that outside cover spare with inside chipware is together fixed. The knob that this application provided makes outside cover and inside chipware together fixed through joint structure, no longer need use the mode that glue is glued to the risk of easily coming unstuck that has avoided using to glue to bring.

Description

Knob and cooking appliance

Technical Field

The utility model relates to a household electrical appliances field specifically relates to a knob and cooking device.

Background

In the knob design of the applied home appliance, such as the knob design of an oven, a microwave oven, or a microwave oven, in order to meet the stress intensity requirement of the knob in the use process or the situation that some has a certain requirement on the appearance and needs to additionally process the surface of the knob, the split knob made of plastic is usually selected.

Split type knob need be connected each part, and the connected mode commonly used at present is for gluing, and in order to prevent that the user from seeing split type plastics knob glue in the assembly process, glue is located the inside invisible part of structure usually, and these parts air is not circulated usually, to glue, need carry out glue solidification and glue solidification effect not good for a long time usually, also can appear the knob slightly by the condition that the heating comes unstuck promptly.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a knob in order to overcome the split type plastics knob that prior art exists and utilize glue to splice and the easy problem of coming unstuck that causes.

In order to achieve the above object, an aspect of the present invention provides a knob including an outer cover member and an inner core member, the outer cover member having a through receiving hole formed therein, the inner core member having an insertion shaft formed therein for inserting into the receiving hole, an inner surface of the receiving hole and an outer surface of the insertion shaft being formed together with a snap structure so that the outer cover member and the inner core member are fixed together.

Preferably, one of the inner surface of the receiving hole and the outer surface of the protruding shaft is formed with an annular rib, and the other is formed with an annular groove for receiving the annular rib; and one of the inner surface of the accommodating hole and the outer surface of the extending shaft is provided with a guide convex rib parallel to the axis of the accommodating hole, and the other one is provided with a guide groove matched with the guide convex rib.

Preferably, the height of the annular rib does not exceed the depth of the annular groove.

Preferably, the outer cover member includes a knob cover, a knob decorative ring, and a knob case in which the receiving hole is formed, the knob case and the knob cover being connected to both sides of the knob decorative ring, respectively.

Preferably, a first buckling piece is formed on the bottom surface of the knob decorative ring, a second buckling piece is formed on the top surface of the knob shell, and the first buckling piece and the second buckling piece form a buckling connection.

Preferably, the first fastener is a hook protruding downwards from the bottom surface of the knob decorative ring, and the second fastener is a hook groove formed on the top surface of the knob shell.

Preferably, one of the knob case and the knob bezel is formed with a first positioning post, and the other is formed with a first positioning hole for receiving the first positioning post.

Preferably, one of the knob decorative ring and the knob cover is formed with a second positioning column, and the other is formed with a second positioning hole for accommodating the second positioning column.

Preferably, the inner core piece comprises a knob core and a knob elastic piece, the extending shaft is formed on the knob core, a connecting groove is formed in the bottom surface of the knob core, and the knob elastic piece is arranged in the connecting groove.

A second aspect of the present application provides a cooking appliance comprising a knob as described above.

Through above-mentioned technical scheme, through the joint structure for outside cover piece and inside chipware can't break away from, thereby link together two independent parts of split type knob. Wherein the inner diameter of the receiving bore and the outer diameter of the protruding shaft are matched to secure the outer cover member and the inner core member together. The knob that this application provided makes outside cover and inside chipware together fixed through joint structure, no longer need use the mode that glue is glued to the risk of easily coming unstuck that has avoided using to glue to bring.

Drawings

Fig. 1 is a schematic view of a knob housing of a knob according to a preferred embodiment of the present invention;

FIG. 2 is a bottom view of the knob housing of FIG. 1;

fig. 3 is a schematic view of a knob core of a knob according to a preferred embodiment of the present invention;

FIG. 4 is a top view of the knob core of FIG. 3;

FIG. 5 is a side view of the knob core of FIG. 3;

fig. 6 is a schematic view of a knob bezel of a knob according to a preferred embodiment of the present invention;

FIG. 7 is a side view of the knob bezel of FIG. 6;

FIG. 8 is a schematic view of a knob cover of a knob according to a preferred embodiment of the present invention;

FIG. 9 is a side view of the knob cover of FIG. 8;

fig. 10 is an exploded view of the knob of the preferred embodiment of the present invention.

Description of the reference numerals

10-accommodating hole 11-annular rib 12-guide rib 20-extending shaft 21-annular groove 22-guide groove 30-knob cover 31-second positioning column 40-knob decorative ring 41-first buckle 42-first positioning column 43-second positioning hole 50-knob shell 51-second buckle 52-first positioning hole 60-knob core 61-connecting groove 70-knob shrapnel

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 description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The utility model provides a knob, the knob includes outside cover spare and inside chipware, be formed with the accommodation hole 10 that link up in the outside cover spare, inside chipware is formed with and is used for stretching into the axle 20 that stretches into of accommodation hole, the internal surface of accommodation hole 10 with the surface of stretching into axle 20 is formed with the joint structure jointly, so that outside cover spare with inside chipware is together fixed. The knob that this application provided makes outside cover and inside chipware together fixed through joint structure, no longer need use the mode that glue is glued to the risk of easily coming unstuck that has avoided using to glue to bring.

Specifically, one of the inner surface of the receiving hole 10 and the outer surface of the protruding shaft 20 is formed with an annular rib 11, and the other is formed with an annular groove 21 for receiving the annular rib; and one of the inner surface of the receiving hole 10 and the outer surface of the protruding shaft 20 is formed with a guide rib 12 parallel to the axis thereof, and the other is formed with a guide groove 22 for matching with the guide rib 12. The annular convex edge is matched with the annular groove and the guide convex edge is matched with the guide groove to jointly form the clamping structure, so that the outer cover piece and the inner core piece are fixedly connected together, and the inner core piece can be driven to rotate together when the outer cover piece is rotated.

The annular ridge 11 can be received in the annular groove 21 so that the outer cover and the inner core cannot be disengaged, thereby connecting the two separate parts of the split knob together. The inner diameter of the accommodating hole is matched with the outer diameter of the extending shaft, the outer cover part and the inner core part are made of plastic, in the process that the extending shaft extends into the accommodating hole, due to the characteristics of the plastic, the inner surface of the accommodating hole 10 and the outer surface of the extending shaft 20 are slightly deformed, extrusion can be generated between the annular convex edge and the outer surface of the extending shaft, when the annular convex edge 11 is formed on the inner surface of the accommodating hole 10, the annular groove 21 is formed on the outer surface of the extending shaft 20, and the annular groove moves to the position of the annular convex edge along with the extending of the extending shaft; when the annular projected ridge 11 is formed on the outer surface of the protruding shaft 20, an annular groove 21 is formed on the inner surface of the receiving hole 10, and the annular projected ridge moves to the position of the annular groove with the protruding of the protruding shaft, so that the annular projected ridge can be received in the annular groove at the end, and the inner diameter of the receiving hole and the outer diameter of the protruding shaft are matched, so that the annular projected ridge cannot be removed from the annular groove, thereby fixing the outer cap and the inner core together.

The matching form of the guide groove 22 and the guide rib 12 can play a role in guiding the extension shaft during the extension of the extension shaft 20 into the accommodating hole 10, so that the extension shaft can be installed in place. The outer cover is capable of transmitting a torque to the inner core when the outer cover is driven to rotate by an external force, thereby driving the inner core to rotate together. In addition, the guide groove and the guide convex rib can ensure the connection precision of the extending shaft and the accommodating hole and enable the connecting position of the accommodating hole and the extending shaft to be unique.

Wherein, the height of annular bead should not exceed the degree of depth of annular groove, if the height of annular bead has exceeded the degree of depth of annular groove, when annular bead holds in annular groove, can continuously take place to extrude between annular bead and the annular groove, and long period's extrusion can increase the fracture risk of outside cover piece and inside core spare, and the internal surface of accommodation hole also can't accurately laminate with the surface that stretches into the axle, influences the assembly precision of knob. In the preferred embodiment of the present application, the depth of the annular groove is higher than the height of the annular rib, for example, the height of the annular rib is 0.2mm, and the depth of the annular groove is 0.25 mm; the thickness of the annular convex rib is matched with the width of the annular groove, so that the annular convex rib is prevented from swinging along the width direction of the annular groove after being accommodated in the annular groove.

As shown in fig. 10, in the preferred embodiment of the present application, the outer cover of the knob comprises a knob cover 30, a knob bezel 40, a knob housing 50, and the inner core piece of the knob comprises a knob core 60 and a knob dome 70. As shown in fig. 1 and 2, a receiving hole is formed in the knob case 50, an annular rib 11 is formed on an inner surface of the receiving hole 10, and 4 guide ribs 12 are provided on the inner surface of the receiving hole 10 at equal intervals, the guide ribs extending from one end to the other end of the receiving hole 10. Referring to fig. 3, 4 and 5, an insertion shaft is formed in the knob core 70, an annular groove 21 is formed on an outer surface of the insertion shaft, and 4 guide grooves 22 corresponding to the guide protrusions 12 are provided on the outer surface of the insertion shaft.

The knob of the application is divided into 5 independent parts, particularly the external cover part is divided into the independent knob cover 30, the knob decorative ring 40 and the knob shell 50, each part can be made of plastic materials, and different appearance processing technologies including but not limited to electroplating, polishing, oil spraying and the like can be respectively carried out on each part, so that the condition that the design of the knob has specific requirements on the appearance can be met. Of course, if the knob cover 30, the knob bezel 40 and the knob case 50 do not need to be individually subjected to different appearance processes, the outer cover member may be manufactured in an integrally formed process.

Wherein, for meeting the requirement that the knob core is not damaged in a fatigue state under a stress state in the using process, PBT plastic or PA plastic can be selected, and because the cost of the PA plastic is higher, the PBT plastic is usually selected. The parts which have requirements on appearance, such as the knob cover, the knob shell and the knob decorative ring, can be made of ABS or PC or a mixture of ABS and PC.

The knob can be connected in a proper mode through each independent part, a first buckling piece 41 is formed on the bottom surface of the knob decorative ring 40, a second buckling piece 51 is arranged on the top surface of the knob shell, and the first buckling piece and the second buckling piece can be connected in a buckling mode. Fig. 6 and 7 show the structure of the knob bezel 40, and the first catching part is a hook protruding outward from the bottom surface of the knob bezel. Fig. 1 and 2 show a second fastener disposed on the knob shell 50, a hook groove having a hook is disposed on the top surface of the knob shell, and the hook on the knob decorative ring can extend into the hook groove on the top surface of the knob shell, so as to be fastened together with the hook in the hook groove, thereby realizing the connection between the knob decorative ring 40 and the knob shell 50. It is of course also possible to provide the hook on the knob decorative ring and the hook groove on the knob housing, but considering that the knob decorative ring is generally thinner, providing the hook groove will affect the connection between the other side of the decorative ring and the knob cover, therefore in this preferred embodiment, the hook protruding towards the knob housing is selected to be provided on the decorative ring, and the hook groove matching the hook is provided on the knob housing.

The knob shell and the knob decorative ring are further provided with a structure for positioning, a plurality of first positioning columns 42 arranged on the decorative ring are shown in fig. 6 and 7, a plurality of first positioning holes arranged on the knob shell are shown in fig. 1 and 2, and during assembly, the first positioning columns are respectively aligned to the first positioning holes so as to determine the position relation between the knob shell and the knob device ring, and what needs to be described is the matching of the positioning columns and the positioning holes. Certainly, the positioning hole can also be arranged on the knob decorative ring, and the positioning column is arranged on the knob shell, but the reason of the positioning hole is the same as that of the buckling piece, because the decorative ring is generally thinner, the depth of the positioning hole formed in the decorative ring can be limited, and the positioning column is not favorable for being connected with the positioning hole.

The knob lid and the knob decorate and to adopt the buckle to connect between the circle equally, if adopt the buckle to connect the material of knob lid will be injectd to plastics, but in common knob design, the alloy material is chooseed for use more to the knob lid, the alloy material is not fit for using the buckle to connect, and if choose for use the buckle to connect, the comparison that the knob lid can not do yet is thinner, consequently in the structure that fig. 10 shows, choose for use glue between knob lid 30 and the knob decorate the circle 40 and connect, not only can make the knob lid adopt the alloy material like this, can also make the knob lid do thinner, the design requirement of matching the knob.

It should be noted that, under the condition that the knob cover and the knob decoration ring are connected by glue, the knob decoration ring and the knob shell may be connected by a snap (as shown in the embodiment shown in fig. 10), but not limited thereto, and the knob decoration ring and the knob shell may also be connected by glue. However, if the connection between the knob cover and the knob decorative ring and the connection between the knob decorative ring and the knob housing are not simultaneously selected, the snap connection is not preferable, because the structure of each component may be too complicated, on one hand, the cost of a mold for molding each component may be increased, and on the other hand, the thinning of the knob decorative ring and the knob cover may be affected.

In the current knob design, most of the knob covers need to be provided with zero positions on the outer surface and marked by marks, so that the marks can be assembled at the correct positions, the connection between the knob cover 30 and the knob decorative ring 40 also needs to be provided with a positioning structure so as to quickly position the knob cover during assembly. As shown in fig. 8 and 9, a second positioning column 31 is disposed on the knob cover 30; as shown in fig. 6, the knob decorative ring 40 is provided with a second positioning hole 43, and the second positioning column 31 is inserted into the second positioning hole 43 during assembly, so that the knob cover can be quickly positioned.

Certainly, the positioning column can be arranged on the knob decorative ring, the positioning hole is formed in the knob cover, but the knob cover is thinner and is not suitable for being provided with a hole, although the knob decorative ring also has certain requirements on thickness and tends to be thinner, referring to the structure shown in fig. 1, the knob shell is provided with a hole corresponding to the second positioning hole, so that the second positioning column on the knob cover can extend into the hole in the knob cover after penetrating through the second positioning hole in the decorative ring, and the positioning accuracy of the knob cover is improved.

As shown in fig. 3 and 10, the inner core member includes a knob core 60 and a knob spring 70, the protruding shaft 20 is formed on the knob core 60, the coupling groove 61 is provided on the bottom surface of the knob core 60, the knob spring 70 is disposed in the coupling groove 61, and the knob provided in the present application enables the knob to be mounted on a knob connecting rod of a cooking appliance, such as an oven, a microwave oven, or a microwave oven, using the coupling groove 61 of the knob core 60.

A second aspect of the present application provides a cooking appliance comprising a knob as described above. The cooking appliance includes, but is not limited to, an oven, a microwave oven.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical scheme of the utility model in the technical conception scope, can be right carry out multiple simple variant. Including each of the specific features, are combined in any suitable manner. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. A knob, characterized in that, the knob includes outer cover piece and inside core spare, be formed with the holding hole (10) that link up in the outer cover piece, inside core spare is formed with and is used for stretching into the shaft (20) that stretches into of holding hole, the internal surface of holding hole (10) and the surface of stretching into shaft (20) form jointly has the joint structure, so that outer cover piece and inside core spare are fixed together.

2. The knob according to claim 1, wherein one of an inner surface of the receiving hole (10) and an outer surface of the protruding shaft (20) is formed with an annular rib (11), and the other is formed with an annular groove (21) for receiving the annular rib; and one of the inner surface of the receiving hole (10) and the outer surface of the protruding shaft (20) is formed with a guide rib (12) parallel to the axis thereof, and the other is formed with a guide groove (22) for matching with the guide rib (12).

3. Knob according to claim 2, wherein the height of the annular ridge (11) does not exceed the depth of the annular groove (21).

4. The knob according to claim 1, wherein the outer cover includes a knob cover (30), a knob bezel (40), and a knob case (50), the receiving hole (10) is formed in the knob case (50), and the knob case (50) and the knob cover (30) are respectively connected to both sides of the knob bezel (40).

5. The knob according to claim 4, characterized in that a bottom surface of the knob bezel (40) is formed with a first snap (41), a top surface of the knob housing (50) is formed with a second snap (51), and the first snap (41) and the second snap (51) form a snap connection.

6. The knob according to claim 5, wherein the first hooking member (41) is a hook protruding downward from a bottom surface of the knob bezel (40), and the second hooking member (51) is a hook groove formed on a top surface of the knob case (50).

7. The knob according to claim 4, wherein one of said knob case (50) and said knob bezel (40) is formed with a first positioning post (42), and the other is formed with a first positioning hole (52) for receiving said first positioning post (42).

8. The knob according to claim 4, wherein one of the knob bezel (40) and the knob cover (30) is formed with a second positioning post (31), and the other is formed with a second positioning hole (43) for receiving the second positioning post (31).

9. The knob according to any one of claims 1 to 8, wherein said inner core member comprises a knob core (60) and a knob dome (70), said protruding shaft (20) is formed on said knob core (60), a bottom surface of said knob core (60) is provided with a coupling groove (61), and said knob dome (70) is disposed in said coupling groove (61).

10. Cooking appliance, characterized in that it comprises a knob according to any one of claims 1 to 9.