Rotary knob

Abstract

A rotary knob comprises a panel, a rotary knob body and a base, the rotary knob body and the base are arranged in the panel, the rotary knob body partially extends out of the panel, the bottom of the rotary knob body extends in the panel in the radial direction to form an extension portion, the panel is provided with a contact portion in contact fit with the extension portion, the base is provided with a rotary cover, the rotary cover is limited on the rotary knob body in the circumferential direction, and the rotary cover is arranged on the rotary knob body. The knob body is provided with a contact portion and a mounting portion extending into the knob body, the periphery of the mounting portion is sleeved with an elastic ring, and the elastic ring is in interference fit with the top wall in the knob body, so that the extension portion of the knob body always tends to be tightly attached to the contact portion. Due to the arrangement of the elastic piece, the friction force between the extension part of the knob body and the contact part of the panel is increased, and the knob body is ensured to have good hand feeling during rotation; meanwhile, the width of the gap between the opposite faces of the annular rack and the base is kept constant in the rotating process of the rotary knob body, and the sound feedback consistency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of knob assemblies, and in particular to a knob. Background Art

[0002] The knob is a manual component that is controlled to rotate by hand and is widely used in household appliances. The structure of a common knob can refer to the Chinese invention patent "A knob with a damping structure and a household appliance cover using the knob" with patent number CN201710061182.7 (authorization announcement number CN106653447B). The knob includes a damping friction mechanism arranged between the buckle seats, and the damping friction mechanism includes a plurality of tooth grooves and a spring damper provided on the inner end surface of the knob. The tooth grooves are arranged in a ring shape, and the spring damper elastically contacts the tooth grooves and freezes the knob. When the knob is rotated, the spring damper and the surface of the tooth grooves generate discontinuous friction vibrations and obtain sound feedback. However, this type of knob has the following problems when used: the feel of the knob and the consistent sound feedback cannot be achieved at the same time. If the spring damper is too elastic, the feel of the knob will be worse due to the increased force required to rotate the knob; if the spring damper is too elastic, the consistency of the sound feedback generated by the friction vibration between the spring damper and the tooth groove surface will be worse. Therefore, in order to achieve both the feel of the knob rotation and consistent sound feedback, the existing knob structure needs to be improved. Summary of the invention

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

[0004] The technical solution adopted by the present invention to solve the above technical problems 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 radially extends an extension portion in the panel, the panel has a contact portion that contacts and cooperates with the extension portion, 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 at intervals along the circumferential direction, a gap is provided between the opposite surfaces of the annular rack and the base, the base is provided with an elastic damping member, the head of the elastic damping member extends into the gap and elastically contacts the tooth groove, and is 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, the outer periphery of the mounting portion is sleeved with an elastic ring, the elastic ring is interference fit with the top wall inside the knob body, so that the extension portion of the knob body always has a tendency to be closely attached to the contact portion.

[0005] In order to make the extension part always have a tendency to be in close contact with the contact part, preferably, the elastic ring includes 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 circumference of the mounting part, and the top end of the second ring part is 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 its extension part always have a tendency to move upward, so that the extension part is in close contact with the contact part on the panel.

[0006] Preferably, the second ring portion is in a trumpet shape with a diameter gradually increasing from bottom to top, and there is a gap between the second ring portion and the outer wall of the mounting portion. In this way, when the knob is rotated or pressed, the trumpet-shaped second ring portion can be radially compressed and deformed, thereby further improving the feel of the knob.

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

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

[0009] The elastic member acts between the ticking pin and the base so that the head of the ticking pin always tends to abut against the tooth groove. The cooperation between the annular rack and the ticking pin realizes the precise positioning of the knob body when it rotates. At the same time, the elastic force of the elastic member acts on the ticking pin so that the head of the ticking pin always tends to abut against the tooth groove, so that the ticking pin and the tooth groove generate discontinuous friction vibration and give sound feedback.

[0010] In order to prevent the elastic member from shifting when the knob body rotates, preferably, a mounting hole for accommodating the elastic damping member is provided at a position of the base directly opposite to the annular rack, and the bottom of the ticking pin partially extends downward to form a connecting portion, and the elastic member is a compression spring, which is sleeved on the connecting portion, and its two ends respectively abut against the bottom surface of the ticking pin and the bottom surface inside the mounting hole.

[0011] In order to ensure that the knob body and the annular rack rotate in a consistent manner, preferably, the extension portion and the annular rack are an integral piece.

[0012] Preferably, there is line contact between the contact portion and the extending portion.

[0013] In order to ensure that the distance between the base and the panel remains constant, preferably, the base is partially raised upward to form a limiter, and the top of the limiter contacts the panel. The setting of the limiter 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 provided on the base, so that the knob can accurately adjust the gear position according to the rotation angle of the knob body.

[0015] The angle sensor can be a sensor with angle measurement capability such as a capacitive angle sensor or a magnetoresistive angle sensor. Preferably, the angle sensor is a potentiometer, and the output shaft of the potentiometer is connected to the rotating cover. The potentiometer can also perform press recognition, so that the knob can be adjusted not only by rotation but also by pressing.

[0016] Compared with the prior art, the advantages of the present invention are: an elastic ring is sleeved on the outer periphery of the mounting portion of the rotating cover of the knob, and the elastic ring is interference fit with the top wall inside the knob body, so that the extended portion of the knob body always has a tendency to be closely attached to the contact portion of the panel, thereby increasing the friction between the extended portion and the contact portion, thereby ensuring that the knob body has a good feel when rotating; at the same time, it ensures that the width of the gap between the opposite surfaces of the annular rack and the base remains constant during the rotation of the knob body, thereby improving the consistency of sound feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 Based Figure 1 Sectional view at AA in the middle;

[0019] Figure 3 An exploded view of an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of elastic interference between the elastic damping member and the tooth groove in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-4As shown, the knob of this embodiment includes 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 an annular rack 22 is provided at the bottom thereof. The bottom surface of the annular rack 22 is provided with a plurality of tooth grooves 221 arranged at intervals along the circumferential direction. There is a gap 33 between the opposite surfaces of the annular rack 22 and the base 3. An elastic damping member 4 is provided on the base 3. The head of the elastic damping member 4 extends into the gap 33 and elastically abuts against the tooth groove 221. Specifically, the elastic damping member 4 includes a ticking pin 41 and an elastic member 42. The ticking pin 41 can be movably installed on the base 3 up and down. The elastic member 42 is a compression spring. The compression spring acts between the ticking pin 41 and the base 3 so that the head of the ticking pin 41 always has a tendency to abut against the tooth groove 221. In order to prevent the elastic member 42 from deflecting when the knob body rotates, a mounting hole 31 for accommodating the elastic damping member 4 is provided at the position of the base 3 facing the annular rack 22, and the bottom of the ticking pin 41 partially extends downward to form a connecting portion 411, and the compression spring is sleeved on the connecting portion 411, and the two ends respectively abut against the bottom surface of the ticking pin 41 and the bottom surface inside the mounting hole 31. The elastic damping member 4 achieves precise positioning when the knob body 2 rotates through the cooperation of the annular rack 22 and the ticking pin 41, and at the same time, the elastic force of the elastic member 42 acts on the ticking pin 41 so that its head always has a tendency to abut against the tooth groove 221, so that the ticking pin 41 and the tooth groove 221 produce discontinuous friction vibration and give sound feedback.

[0023] An extension portion 21 is radially extended from the bottom of the knob body 2 in the panel 1. The extension portion 21 is integrally formed with the annular rack 22. The panel 1 has a contact portion 11 that contacts and cooperates with the extension portion 21 and is in line contact with the extension portion 21. A rotating cover 5 is provided on the base 3. The rotating cover 5 has an annular step 52 that extends radially. The knob body 2 is provided with a recess 23 that cooperates with the annular step 52. The recess 23 is circumferentially provided with at least two limiting portions 24. The annular step 52 is provided with a limiting groove 53 that cooperates with the limiting portion 24. Through the cooperation between 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 that extends 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 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 be closely attached to the contact portion 11. The setting of the elastic ring 6 has the following advantages: first, the friction between the extension portion 21 and the contact portion 11 is increased, thereby ensuring that the knob body 2 has a good feel when rotating; second, the width of the gap 33 between the annular rack 22 and the opposite surface of the base 3 is ensured to remain 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, and the second ring portion 62 is in a trumpet shape with a gradually increasing caliber from bottom to top, and there is a gap between the second ring portion 62 and the outer wall of the mounting portion 51, and the top end is interference fit with the top wall inside the knob body 2. When the knob is pressed or rotated, the trumpet-shaped second ring portion can produce radial compression deformation and deflection deformation, thereby further improving the feel of the knob.

[0024] In addition, the base 3 partially protrudes upward to form a limiter 32, and the top of the limiter 32 contacts the panel 1. The setting of the limiter 32 limits the distance between the base 3 and the panel 1, thereby further ensuring that the gap 33 between the opposite surfaces of the annular rack 22 and 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 adopts a potentiometer, and the output shaft of the potentiometer is connected to the rotating cover 5. A limiter surface 71 is provided on the output shaft of the potentiometer, and a receiving surface 53 that cooperates with the limiter surface 71 is provided on the rotating cover 5. The limiter surface 71 and the receiving surface 53 cooperate to limit the relative rotation between the potentiometer and the rotating cover 5, thereby making the monitoring of the rotation angle more accurate. The potentiometer can also perform press recognition, so that the knob can not only be adjusted by rotation, but also by press adjustment.

Claims

1. A knob, comprising a panel (1), a knob body (2) and a base (3) arranged in the panel (1), wherein the knob body (2) partially extends out of the panel (1), an extension portion (21) radially extends from the bottom of the knob body (2) in the panel (1), the panel (1) has a contact portion (11) that contacts and cooperates with the extension portion (21), an annular rack (22) is arranged at the bottom of the knob body (2), a plurality of tooth grooves (221) arranged at intervals along the circumferential direction are arranged on the bottom surface of the annular rack (22), a gap (33) is provided between the opposing surfaces of the annular rack (22) and the base (3), an elastic damping member (4) is provided on the base (3), the head of the elastic damping member (4) extends into the gap (33) and elastically contacts the tooth grooves (221), and the characteristics are: The base (3) is provided with a rotating cover (5), the rotating cover (5) is circumferentially limited on the knob body (2), and has a mounting portion (51) extending into the knob body (2), the outer circumference of the mounting portion (51) is sleeved with an elastic ring (6), the elastic ring (6) is interference-fitted 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 be closely attached to the contact portion (11).

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

3. The knob according to claim 2, characterized in that: The second ring portion (62) is in the shape of a trumpet with a diameter gradually increasing from bottom to top, and there is a gap between the second ring portion (62) and the outer wall of the mounting portion (51).

4. The knob according to any one of claims 1 to 3, characterized in that: The elastic damping member (4) comprises: a ticking pin (41) movably mounted on the base (3); and The elastic member (42) acts between the ticking pin (41) and the base (3) so that the head of the ticking pin (41) always has a tendency to abut against the tooth groove (221).

5. The knob according to claim 4, characterized in that: A mounting hole (31) for accommodating the elastic damping member (4) is provided at a position of the base (3) directly opposite to the annular rack (22); a portion of the bottom of the ticking pin (41) extends downward to form a connecting portion (411); the elastic member (42) is a compression spring, which is sleeved on the connecting portion (411), and two ends of which respectively abut against the bottom surface of the ticking pin (41) and the bottom surface inside the mounting hole (31).

6. The knob according to any one of claims 1 to 3, characterized in that: The extension portion (21) and the annular rack (22) are an integral piece.

7. The knob according to any one of claims 1 to 3, characterized in that: There is line contact between the contact portion (11) and the extension portion (21).

8. The knob according to any one of claims 1 to 3, characterized in that: The base (3) partially protrudes upward to form a limiting member (32), and the top end of the limiting member (32) contacts the panel (1).

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

10. The knob according to claim 9, characterized in that: The angle sensor (7) is a potentiometer, and the output shaft of the potentiometer is connected to the rotating cover (5).

Images