A knob

Abstract

A knob comprises a panel, a knob body and a base arranged in the panel, the knob body partially extends out of the panel, the bottom of the knob body extends out of an extension in the panel in a radial direction, the panel is provided with a contact part in contact with the extension, the base is provided with a rotating cover, the rotating cover is circumferentially limited on the knob body and has a mounting part extending into the knob body, the outer periphery of the mounting part is sleeved with an elastic ring, the elastic ring is interference-fitted with a top wall inside the knob body, so that the extension of the knob body always has a tendency to be close to the contact part. The arrangement of the elastic member increases the friction between the extension of the knob body and the contact part of the panel, ensures that the knob body has a good hand feeling when rotating; at the same time, the width of the gap between the relative surfaces of the annular rack and the base is kept constant during the rotation of the knob body, and the consistency of sound feedback is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of knob assembly, in particular to a knob. BACKGROUND

[0002] Knob is a hand control rotating manual element, which is widely used in household appliances. The structure of common knob can refer to Chinese invention patent No. CN201710061182.7 (authorized publication No. CN106653447B) "Knob with damping structure and upper cover of household appliance applying the knob", which comprises a damping friction mechanism arranged between the buckle seats, the damping friction mechanism comprises a plurality of tooth grooves arranged on the inner end surface of the knob and a spring damping piece, the tooth grooves are arranged in a ring shape, and the spring damping piece is in elastic contact with the tooth grooves and fixes the knob, when the knob rotates, the spring damping piece and the surface of the tooth groove produce discontinuous friction vibration, and sound feedback is obtained. However, the following problems exist when using this kind of knob: the hand feeling of the knob and the consistency of the sound feedback obtained cannot be achieved at the same time, if the elasticity of the spring damping piece is too large, the force required to rotate the knob will increase, which will make the hand feeling of the knob worse, if the elasticity of the spring damping piece is too small, the consistency of the sound feedback produced by the friction vibration between the spring damping piece and the surface of the tooth groove will be poor. Therefore, in order to consider the hand feeling of the knob and obtain consistent sound feedback, the existing knob structure still needs to be improved. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a knob with good hand feeling and high consistency of sound feedback in view of the above-mentioned prior art.

[0004] The technical scheme adopted by the present application to solve the above technical problem is as follows: the knob comprises a panel, a knob body and a base arranged in the panel, the knob body partially protrudes from the panel, the bottom of the knob body extends radially in the panel to form an extension, the panel has a contact portion in contact with the extension, the bottom of the knob body is provided with an annular rack, the bottom surface of the annular rack is provided with a plurality of tooth grooves arranged in a circumferential direction, the annular rack and the opposite surface of the base have a gap, and the base is provided with an elastic damping piece, the head of the elastic damping piece extends into the gap and elastically contacts with the tooth groove, characterized in that: the base is provided with a rotating cover, the rotating cover is circumferentially limited on the knob body and has a mounting portion extending into the knob body, an elastic ring is sleeved on the outer periphery of the mounting portion, the elastic ring is in interference fit with the top wall inside the knob body, so that the extension of the knob body always has a tendency to tightly contact with the contact portion.

[0005] In order to make the extension always have the tendency to be close to the contact part, preferably, the elastic ring comprises a first ring part and a second ring part connected in sequence from bottom to top, the first ring part is sleeved on the outer periphery of the mounting part, and the top end of the second ring part is in interference fit with the top wall inside the knob body. In this way, the second ring part acts on the top wall inside the knob body, so that the knob body and the extension always have the tendency to move upward, so that the extension is close to the contact part on the panel.

[0006] Preferably, the second ring part is trumpet-shaped with a gradually increasing caliber from bottom to top, and has a gap between the mounting part outer wall. In this way, when the knob is rotated or pressed, the trumpet-shaped second ring part can be radially compressed and deflected, thereby further improving the hand feeling of the knob.

[0007] In order to obtain sound feedback when the knob is rotated, preferably, the elastic damping member comprises:

[0008] a click pin movably mounted on the base; and

[0009] an elastic member acting between the click pin and the base, so that the head of the click pin always has the tendency to abut against the tooth groove. Through the cooperation of the annular rack and the click pin, accurate positioning is realized when the knob body is rotated, and the elastic force of the elastic member acts on the click pin so that the head of the click pin always has the tendency to abut against the tooth groove, so that the click pin and the tooth groove produce discontinuous friction vibration and give sound feedback.

[0010] In order to avoid the elastic member from being deviated when the knob body is rotated, preferably, the base is provided with a mounting hole for accommodating the elastic damping member at a position opposite to the annular rack, the bottom of the click pin is partially extended downward to form a connecting part, and the elastic member is a compression spring sleeved on the connecting part and having two ends respectively abutting against the bottom surface of the click pin and the bottom surface inside the mounting hole.

[0011] In order to make the rotation of the knob body and the annular rack consistent, preferably, the extension and the annular rack are an integral part.

[0012] Preferably, the contact part and the extension are in line contact.

[0013] In order to ensure that the distance between the base and the panel remains constant, preferably, the base is partially upwardly protruded to form a limiting part, and the top end of the limiting part contacts the panel. The limiting part limits the distance between the base and the panel, thereby further ensuring that the gap between the annular rack and the opposite surface of the base is constant.

[0014] In order to realize the rotation adjustment of the knob, preferably, an angle sensor for monitoring the rotation angle of the knob body is arranged on the base. In this way, the knob can be accurately adjusted according to the rotation angle of the knob body.

[0015] The angle sensor can be a sensor with an angle measuring capability, such as a capacitive angle sensor, a magnetoresistive angle sensor, etc. Preferably, the angle sensor is a potentiometer, and the output shaft of the potentiometer is connected with the rotating cover. The potentiometer can also perform press recognition, so that the knob can be not only rotationally adjusted, but also press-adjusted.

[0016] Compared with the prior art, the advantage of the present application is that the elastic ring is sleeved on the outer periphery of the mounting portion of the rotating cover, and the elastic ring is in interference fit with the top wall inside the knob body, so that the extension portion of the knob body always has the tendency to tightly contact with the contact portion of the panel, the friction force between the extension portion and the contact portion is increased, so that the knob body has a good hand feeling when rotating; at the same time, the width of the gap between the relative surfaces of the annular rack and the base is kept constant during the rotation of the knob body, and the consistency of the sound feedback is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of an embodiment of the present application;

[0018] Figure 2 is a structural schematic view of an embodiment of the present application; Figure 1 is a sectional view of A-A in the present application;

[0019] Figure 3 is an exploded view of an embodiment of the present application;

[0020] Figure 4 is a structural schematic view of the elastic damping member and the tooth groove elastic resistance in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The present application will be further described in detail below with reference to the embodiments of the drawings.

[0022] As Figures 1-4As shown, the knob of the embodiment comprises a panel 1, a knob body 2 and a base 3 arranged in the panel 1. The knob body 2 partially extends out of the panel 1, and the bottom of the knob body 2 is provided with an annular rack 22, the bottom surface of the annular rack 22 is provided with a plurality of tooth grooves 221 arranged in a circumferential direction, the annular rack 22 and the opposite surface of the base 3 have a gap 33, the base 3 is provided with an elastic damping member 4, the head of the elastic damping member 4 extends into the gap 33 and elastically abuts the tooth groove 221. Specifically, the elastic damping member 4 comprises a click pin 41 and an elastic member 42, the click pin 41 is movably installed on the base 3, the elastic member 42 is a compression spring, the compression spring acts between the click pin 41 and the base 3, so that the head of the click pin 41 always has a tendency to abut in the tooth groove 221. In order to avoid the elastic member 42 from being deviated when the knob body rotates, the base 3 is provided with a mounting hole 31 for accommodating the elastic damping member 4 at the position opposite to the annular rack 22, the bottom of the click pin 41 partially extends downward to form a connecting portion 411, the compression spring is sleeved on the connecting portion 411, and the two ends are respectively abutted with the bottom surface of the click pin 41 and the bottom surface inside the mounting hole 31. The elastic damping member 4 realizes accurate positioning of the knob body 2 when rotating through the cooperation of the annular rack 22 and the click pin 41, and the elastic force of the elastic member 42 acts on the click pin 41 to make the head of the click pin 41 always have a tendency to abut in the tooth groove 221, so that the click pin 41 and the tooth groove 221 produce discontinuous friction vibration and give voice feedback.

[0023] The bottom of the knob body 2 extends radially out of the panel 1 as an extension 21, which is integrally formed with an annular gear rack 22, the panel 1 has a contact portion 11 in contact with the extension 21 and in line contact with the extension 21, the base 3 is provided with a rotating cover 5 having a radially extending annular step 52, the knob body 2 is provided with a recess 23 matched with the annular step 52, the recess 23 is circumferentially distributed with at least two limiting portions 24, and the annular step 52 is provided with a limiting groove 53 matched with the limiting portion 24, through the cooperation of the limiting portion 24 and the groove 53, the rotating cover 5 is circumferentially limited on the knob body 2, the rotating cover 5 has a mounting portion 51 extending into the knob body 2, the outer periphery of the mounting portion 51 is sleeved with an elastic ring 6, which is in interference fit with the top wall inside the knob body 2, so that the extension 21 of the knob body 2 always has the tendency to be close to the contact portion 11. The elastic ring 6 has the following advantages: first, it increases the friction between the extension 21 and the contact portion 11, thereby ensuring that the knob body 2 has a good hand feeling when rotating; second, it ensures that the width of the gap 33 between the annular gear rack 22 and the opposite surface of the base 3 remains constant during the rotation of the knob body 2, thereby improving the consistency of sound feedback. In this embodiment, the elastic ring 6 includes a first ring portion 61 and a second ring portion 62 connected in sequence from bottom to top, the first ring portion 61 is sleeved on the outer periphery of the mounting portion 51, the second ring portion 62 is in the shape of a horn with the diameter gradually increasing from bottom to top, there is a gap between the second ring portion 62 and the outer wall of the mounting portion 51, and the top end is in interference fit with the top wall inside the knob body 2. The second ring portion in the shape of a horn can produce radial compression deformation and deflection deformation when the knob is pressed or rotated, thereby further improving the hand feeling of the knob.

[0024] In addition, the base 3 is partially upwardly protruding to form a limiting member 32, the top end of the limiting member 32 contacts the panel 1. The limiting member 32 limits the distance between the base 3 and the panel 1, thereby further ensuring that the gap 33 between the annular gear rack 22 and the opposite surface of the base 3 is constant. The base 3 is also provided with an angle sensor 7 for monitoring the rotation angle of the knob body 2, the angle sensor is a potentiometer, the output shaft of the potentiometer is connected with the rotating cover 5, the output shaft of the potentiometer is provided with a limiting surface 71, and the rotating cover 5 is provided with a receiving surface 53 matched with the limiting surface 71, the cooperation of the limiting surface 71 and the receiving surface 53 can limit the relative rotation between the potentiometer and the rotating cover 5, thereby making the monitoring of the rotation angle more accurate, and the potentiometer can also perform press recognition, so that the knob can not only be rotated for adjustment, but also be pressed for adjustment.

Claims

1. A knob comprising a face plate (1), a knob body (2) and a base (3) arranged in the face plate (1), the knob body (2) partially protruding from the face plate (1), the bottom of the knob body (2) extending radially in the face plate (1) to form an extension (21), the face plate (1) having a contact portion (11) in contact with the extension (21), the bottom of the knob body (2) being provided with an annular gear rack (22), the bottom surface of the annular gear rack (22) being provided with a plurality of circumferentially spaced tooth grooves (221), the annular gear rack (22) and the opposite surface of the base (3) having a gap (33) therebetween, the base (3) being provided with an elastic damping member (4), the head of the elastic damping member (4) extending into the gap (33) and being in elastic contact with the tooth grooves (221), characterized in that: The base (3) is provided with a rotating cover (5) which is circumferentially limited on the knob body (2) and has a mounting portion (51) extending into the knob body (2), the outer periphery of the mounting portion (51) is sleeved with an elastic ring (6), the elastic ring (6) is in interference fit with the top wall inside the knob body (2) so that the extension portion (21) of the knob body (2) always has a tendency to abut against the contact portion (11).

2. The knob of claim 1, wherein: The elastic ring (6) comprises a first ring portion (61) and a second ring portion (62) connected in sequence from bottom to top, the first ring portion (61) is sleeved on the outer periphery of the mounting portion (51), and the top end of the second ring portion (62) is in interference fit with the top wall inside the knob body (2).

3. The knob of claim 2, wherein: The second ring portion (62) is in the shape of a horn with gradually increasing caliber from bottom to top, and has a gap between the outer wall of the mounting portion (51).

4. A knob according to any one of claims 1 to 3, wherein: The elastic damping member (4) comprises: a click pin (41) which is movably mounted on the base (3); and an elastic member (42) acting between the click pin (41) and the base (3) so that the head of the click pin (41) always has a tendency to abut against the tooth groove (221).

5. The knob of claim 4, wherein: The base (3) is provided with a mounting hole (31) for accommodating the elastic damping member (4) at a position opposite to the annular rack (22), the bottom of the click pin (41) is partially extended downward to form a connecting portion (411), the elastic member (42) is a compression spring which is sleeved on the connecting portion (411) and has two ends respectively abutting against the bottom surface of the click pin (41) and the bottom surface inside the mounting hole (31).

6. The knob of any one of claims 1-3, wherein: The extension portion (21) and the annular rack (22) are an integral piece.

7. The knob of any one of claims 1-3, wherein: The contact portion (11) and the extension portion (21) are in line contact.

8. The knob of any one of claims 1-3, wherein: The base (3) is partially upwardly protruded to form a limiting member (32), and the top end of the limiting member (32) contacts the panel (1).

9. The knob of any one of claims 1-3, wherein: The base (3) is provided with an angle sensor (7) for monitoring the rotation angle of the knob body (2).

10. The knob of claim 9, wherein: The angle sensor (7) is a potentiometer, and the output shaft of the potentiometer is connected with the rotating cover (5).

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