CN113934255B - Rotation control device, control method, and audio system - Google Patents
Rotation control device, control method, and audio system Download PDFInfo
- Publication number
- CN113934255B CN113934255B CN202111561192.XA CN202111561192A CN113934255B CN 113934255 B CN113934255 B CN 113934255B CN 202111561192 A CN202111561192 A CN 202111561192A CN 113934255 B CN113934255 B CN 113934255B
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- sensing mechanism
- knob
- fixed contact
- sensing
- rotation
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/08—Controlling members for hand actuation by rotary movement, e.g. hand wheels
- G05G1/10—Details, e.g. of discs, knobs, wheels or handles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/08—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/36—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having only two operative positions, e.g. relatively displaced by 180 degrees
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
Abstract
The invention discloses a rotation control device, which comprises a base and a knob; the base is provided with two sensing mechanisms, each sensing mechanism comprises a body with a fixed contact and an elastic sheet with a movable contact, and the fixed end of each elastic sheet is connected to the body; the inner side wall of the knob is provided with a driving structure which is arranged around the axis of the knob, the driving structure comprises a plurality of grooves and a plurality of lugs, the grooves and the lugs are alternately arranged, and the movable end of the elastic sheet abuts against the grooves; when the knob rotates forwards, the groove and the bump stir the elastic sheet of one sensing mechanism to enable the movable contact and the fixed contact of the sensing mechanism to be contacted, and the sensing mechanism can detect the forward rotation of the knob; when the knob rotates reversely, the groove and the bump stir the elastic sheet of the other sensing mechanism to enable the movable contact and the fixed contact of the sensing mechanism to be contacted, and the sensing mechanism can detect the reverse rotation of the knob; therefore, the rotation angle of the knob is not limited, and the two sensing mechanisms do not need to be arranged at the circle center of the knob, so that the interference with other components is avoided.
Description
Technical Field
The invention relates to the field of sound equipment, in particular to a rotation control device, a control method and a sound system.
Background
The rotary control of the knob can realize more intuitive user experience, especially volume adjustment, than key control in the adjusting scene of the sound system. The existing knob adopts an angle sensor or a slide rheostat to realize the detection of the angle.
Although the angle recognition precision of the knob for detecting the angle by adopting the angle sensor is high, the cost of the angle sensor is high, the power consumption is high, the endurance pressure of the product requiring battery power supply is high, meanwhile, the angle sensor needs to be installed at the circle center of the knob, and the angle sensor arranged at the circle center of the knob may interfere with other components according to the layout of the components in the product.
The knob adopting the slide rheostat to detect the angle can not interfere with other components arranged at the circle center of the knob, but the knob can not rotate for more than 360 degrees. And the knob corresponds to specific voltage or current at a specific rotation angle, and the self-defining function of the specific rotation angle cannot be realized.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a rotation control device, a control method and a sound system, so as to solve the problem that the existing knob cannot realize infinite angle rotation and interference with other components.
The purpose of the invention is realized by adopting the following technical scheme:
a rotary control device comprises a base and a knob which is rotationally connected with the base;
the base is provided with two sensing mechanisms, each sensing mechanism comprises a body and an elastic sheet with a fixed end and a movable end, a fixed contact is arranged on the body, the fixed end of the elastic sheet is connected to the body, and a movable contact opposite to the fixed contact is arranged on the elastic sheet; the fixed contact point of one sensing mechanism is arranged towards a first direction, the fixed contact point of the other sensing mechanism is arranged towards a second direction, and the directions of the first direction and the second direction are opposite;
the inner side wall of the knob is provided with a driving structure which is arranged around the axis of the knob, the driving structure comprises a plurality of grooves and a plurality of convex blocks, the grooves and the convex blocks are alternately arranged, and the movable end of the elastic piece is abutted to the grooves.
In some optional embodiments, a roller is disposed at the movable end of the elastic sheet, and the roller abuts against the groove.
In some optional embodiments, the sensing mechanism further includes a blocking block disposed adjacent to the body, and the blocking block and the fixed contact are respectively located on two sides of the elastic piece.
In some optional embodiments, the sensor further comprises a control circuit board arranged on the base, and the control circuit board is electrically connected with the sensing mechanism.
In some alternative embodiments, the control circuit board is located between two of the sensing mechanisms.
In some alternative embodiments, the junction of the groove and the projection is a smooth transition.
In order to solve the same technical problem, the invention also provides a control method based on the rotation control device, which comprises the following steps:
acquiring the opening and closing times of a movable contact and a fixed contact of a sensing mechanism;
calculating the rotation angle of the knob according to the included angle between two adjacent grooves of the driving structure and the opening and closing times;
judging whether the rotation angle is larger than a preset angle and the rotation time of the knob is smaller than a first preset time;
if yes, generating a mute signal.
In some optional embodiments, before the step of acquiring the opening and closing times of the movable contact and the fixed contact of the sensing mechanism, the method further comprises the following steps:
recording the two sensing mechanisms as a first sensing mechanism and a second sensing mechanism respectively, and acquiring the opening and closing states of a movable contact and a fixed contact of the first sensing mechanism and the opening and closing states of a movable contact and a fixed contact of the second sensing mechanism;
when the opening and closing state of the first sensing mechanism is closed, a forward rotation signal is generated; and when the opening and closing state of the second sensing mechanism is closed, generating an inversion signal.
In some optional embodiments, the preset angle is 80 to 100 °, and the first preset time is 0.2 to 0.5 s.
In order to solve the same technical problem, the invention also provides an acoustic system which comprises the rotation control device.
Compared with the prior art, the invention has the beneficial effects that:
the two sensing mechanisms are respectively used for detecting the forward rotation and the reverse rotation of the knob, when the knob rotates forwards, the groove and the bump stir the elastic sheet of one of the sensing mechanisms to enable the movable contact and the fixed contact of the sensing mechanism to be contacted, and the sensing mechanism can detect the forward rotation of the knob; when the knob rotates reversely, the groove and the bump stir the elastic sheet of the other sensing mechanism to enable the movable contact and the fixed contact of the sensing mechanism to be contacted, and the sensing mechanism can detect the reverse rotation of the knob; therefore, the rotation angle of the knob is not limited, and meanwhile, the two sensing mechanisms do not need to be arranged at the circle center of the knob, so that interference with other components is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a rotary control device of the present invention;
FIG. 2 is a schematic diagram illustrating the steps of the control method of the rotation control apparatus according to the present invention;
in the figure:
10. a base; 20. a knob; 21. a groove; 22. a bump; 30. a sensing mechanism; 31. a body; 311. fixing a contact point; 32. a spring plate; 321. a roller; 33. a blocking block; 34. a first sensing mechanism; 35. a second sensing mechanism; 40. and a control circuit board.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a rotary control apparatus of the present invention is schematically shown, and includes a base 10 and a knob 20, the knob 20 being rotatably coupled to the base 10.
The base 10 is provided with two sensing mechanisms 30, each sensing mechanism 30 comprises a body 31 and an elastic sheet 32 having a fixed end and a movable end, the body 31 is provided with a fixed contact 311, the fixed end of the elastic sheet 32 is connected to the body 31, and the elastic sheet 32 is provided with a movable contact opposite to the fixed contact 311. The fixed contact 311 of one of the sensing mechanisms 30 is disposed in a first direction, and the fixed contact 311 of the other sensing mechanism 30 is disposed in a second direction, the first direction and the second direction being opposite. The elastic sheet 32 has elasticity, and when an external force acts on the elastic sheet 32 to force the elastic sheet 32 to bend, the movable contact on the elastic sheet 32 contacts the fixed contact 311 on the body 31, so that the sensing mechanism 30 detects that the elastic sheet 32 bends towards the body 31.
In order to detect the contact between the fixed contact 311 and the movable contact by the sensing mechanism 30, two terminals of the main body 31 of the sensing mechanism 30 are connected to a detection circuit, when the fixed contact 311 and the movable contact are not in contact, the sensing mechanism 30 is at a low level, when the fixed contact 311 and the movable contact are in contact, the sensing mechanism 30 is switched from the low level to a high level, and the detection circuit detects that the sensing mechanism 30 is at the high level, so that the contact between the fixed contact 311 and the movable contact can be determined.
The knob 20 includes a circular top cover and a circular side wall, which is vertically connected to the outer edge of the top cover. The inner side wall of the knob 20 is provided with a driving structure, and the driving structure is arranged around the axis of the knob 20. The driving structure comprises a plurality of grooves 21 and a plurality of bumps 22, the grooves 21 and the bumps 22 are alternately arranged, and the movable end of the elastic sheet 32 abuts against the grooves 21.
The two sensing mechanisms 30 are respectively referred to as a first sensing mechanism 34 and a second sensing mechanism 35, when the knob 20 rotates forwards, the groove 21 and the projection 22 on the knob 20 move around the axis of the knob 20, the projection 22 pokes the movable end of the elastic sheet 32 of the two sensing mechanisms 30, the elastic sheet 32 of the first sensing mechanism 34 is bent towards the main body 31 of the first sensing mechanism 34, so that the movable contact point on the elastic sheet 32 of the first sensing mechanism 34 is contacted with the fixed contact point 311 on the main body 31 of the first sensing mechanism 34, at the same time, the spring plate 32 of the second sensing mechanism 35 bends towards the body 31 away from the second sensing mechanism 35, so that the movable contact point on the spring plate 32 of the second sensing mechanism 35 is not contacted with the fixed contact point 311 on the body 31 of the second sensing mechanism 35, therefore, the state of the first sensor mechanism 34 and the second sensor mechanism 35 is combined to determine that the knob 20 is rotated forward at this time. On the contrary, when the knob 20 rotates reversely, the groove 21 and the protrusion 22 on the knob 20 move around the axis of the knob 20, and the protrusion 22 pulls the movable ends of the elastic pieces 32 of the two sensing mechanisms 30, so that the elastic pieces 32 of the second sensing mechanism 35 bend towards the body 31 of the second sensing mechanism 35, so that the movable contact points on the elastic pieces 32 of the second sensing mechanism 35 contact with the fixed contact points 311 on the body 31 of the second sensing mechanism 35, and at the same time, the elastic pieces 32 of the first sensing mechanism 34 bend towards the body 31 away from the first sensing mechanism 34, so that the movable contact points on the elastic pieces 32 of the first sensing mechanism 34 do not contact with the fixed contact points 311 on the body 31 of the first sensing mechanism 34, and therefore, the normal rotation of the knob 20 can be judged by combining the states of the first sensing mechanism 34 and the second sensing mechanism 35. Therefore, the two sensing mechanisms 30 can detect the normal rotation state and the reverse rotation state of the knob 20.
Further, for detecting the rotation angle of the knob 20, since the included angle between two adjacent grooves 21 is known, the rotation angle of the knob 20 can be calculated by detecting the number of times of opening and closing the fixed contact 311 and the movable contact of one of the sensing mechanisms 30 (when the movable end of the elastic piece 32 is switched from one groove 21 to the next groove 21, the fixed contact 311 and the movable contact of the sensing mechanism 30 are opened and closed once). If the volume of the sound system is controlled by the rotary control device, the volume of 5% can be adjusted by opening and closing the fixed contact 311 and the movable contact of the sensing mechanism 30.
Specifically, the movable end of the elastic sheet 32 is provided with a roller 321, the roller 321 abuts against the groove 21, the roller 321 is rotatably connected with the movable end of the elastic sheet 32, and the roller 321 can be in rolling contact with the groove 21 or the protrusion 22, so as to reduce friction between the sensing mechanism 30 and the driving mechanism.
In order to avoid excessive bending of the elastic sheet 32 when bending away from the body 31, the sensing mechanism 30 further includes a stopper 33 disposed adjacent to the body 31, the stopper 33 and the fixed contact 311 are respectively located at two sides of the elastic sheet 32, that is, when the elastic sheet 32 bends away from the body 31, the elastic sheet 32 abuts against the stopper 33.
In order to detect the working state of the sensing mechanisms 30, the rotation control device further comprises a control circuit board 40 arranged on the base 10, the control circuit board 40 is located between the two sensing mechanisms 30, and the control circuit board 40 is electrically connected with the sensing mechanisms 30. When the two sensing mechanisms 30 have no state change within the preset sleep preparation time, the control circuit board 40 is switched to the sleep state, and when at least one sensing mechanism 30 has a state change, the control circuit board 40 is switched from the sleep state to the wake-up state.
In order to make the rotation of the knob 20 smoother, the junction of the groove 21 and the projection 22 is smoothly transited.
In order to solve the same technical problem, the present invention further provides a control method based on the above-mentioned rotation control device, as shown in fig. 2, including the following steps:
step S10, acquiring the opening and closing times of the movable contact and the fixed contact 311 of the sensing mechanism 30;
step S20, calculating the rotation angle of the knob 20 according to the included angle and the opening and closing times between two adjacent grooves 21 of the driving structure;
step S30, determining whether the rotation angle is greater than a preset angle and the rotation time of the knob 20 is less than a first preset time;
in step S40, if yes, a mute signal is generated.
Preferably, the preset angle is 80-100 degrees, and the first preset time is 0.2-0.5 s.
In order to determine the normal rotation or the reverse rotation of the knob 20, the method further includes, between step S10:
step S1, recording the two sensing mechanisms 30 as a first sensing mechanism and a second sensing mechanism, respectively, and acquiring the open-close state of the movable contact and the fixed contact 311 of the first sensing mechanism and the open-close state of the movable contact and the fixed contact 311 of the second sensing mechanism;
step S2, when the open-close state of the first sensing mechanism is closed, a forward rotation signal is generated; when the opening and closing state of the second sensing mechanism is closed, an inversion signal is generated. Of course, in order to enhance the user experience of the rotary control device in the extreme state, especially when the rotary control device is used to control the volume level of the audio. When the volume of the audio is zero, the normal rotation speed of the knob 20 is kept unchanged (the user rotates the knob 20 to increase the volume of the audio), the volume of the audio increases first and then decreases, and at this time, if the user rotates the knob 20 in the reverse direction (and the rotation speed of the knob 20 is kept unchanged), the volume of the audio decreases to keep the normal speed. When the volume of the front sound is maximum, the rotation speed of the knob 20 is kept unchanged (the user rotates the knob 20 to reduce the volume of the sound), the volume reduction amplitude of the sound is larger first and then smaller, and at this time, if the user rotates the knob 20 in the forward direction (and the rotation speed of the knob 20 is kept unchanged), the volume increase amplitude of the sound keeps a normal rate.
In order to solve the same technical problem, the invention also provides an acoustic system which comprises the rotation control device.
Compared with the prior art, the invention has the beneficial effects that:
the two sensing mechanisms 30 are respectively used for detecting the forward rotation and the reverse rotation of the knob 20, when the knob 20 rotates forward, the groove 21 and the bump 22 stir the elastic sheet 32 of one of the sensing mechanisms 30 to enable the movable contact of the sensing mechanism 30 to be contacted with the fixed contact 311, and the sensing mechanism 30 can detect the forward rotation of the knob 20; when the knob 20 rotates reversely, the groove 21 and the bump 22 move the spring sheet 32 of the other sensing mechanism 30 to make the movable contact of the sensing mechanism 30 contact with the fixed contact 311, and the sensing mechanism 30 can detect the reverse rotation of the knob 20; therefore, the unlimited rotation angle of the knob 20 is realized, and meanwhile, the two sensing mechanisms 30 do not need to be arranged at the circle center of the knob 20, so that the interference with other components is avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A rotary control device is characterized by comprising a base and a knob which is rotationally connected with the base;
the base is provided with two sensing mechanisms, each sensing mechanism comprises a body and an elastic sheet with a fixed end and a movable end, a fixed contact is arranged on the body, the fixed end of the elastic sheet is connected to the body, and a movable contact opposite to the fixed contact is arranged on the elastic sheet; the fixed contact point of one sensing mechanism is arranged towards a first direction, the fixed contact point of the other sensing mechanism is arranged towards a second direction, and the directions of the first direction and the second direction are opposite;
the sensing mechanism is characterized in that a driving structure surrounding the axis of the knob is arranged on the inner side wall of the knob, the driving structure comprises a plurality of grooves and a plurality of convex blocks, the grooves and the convex blocks are alternately arranged, the movable end of the elastic piece is provided with a roller, the roller abuts against the grooves, the sensing mechanism further comprises a blocking block adjacent to the body, the blocking block and the fixed contact are respectively located on two sides of the elastic piece, the rotation control device is arranged on the control circuit board of the base, the control circuit board is electrically connected with the sensing mechanisms, and the control circuit board is located between the two sensing mechanisms.
2. The rotating control device of claim 1, wherein the junction of the groove and the tab transitions smoothly.
3. A control method based on the rotation control apparatus according to any one of claims 1 to 2, characterized by comprising the steps of:
recording the two sensing mechanisms as a first sensing mechanism and a second sensing mechanism respectively, and acquiring the opening and closing states of a movable contact and a fixed contact of the first sensing mechanism and the opening and closing states of the movable contact and the fixed contact of the second sensing mechanism;
when the opening and closing state of the first sensing mechanism is closed, a forward rotation signal is generated; when the opening and closing state of the second sensing mechanism is closed, a reverse signal is generated;
acquiring the opening and closing times of a movable contact and a fixed contact of the sensing mechanism;
calculating the rotation angle of the knob according to the included angle between two adjacent grooves of the driving structure and the opening and closing times;
judging whether the rotation angle is larger than a preset angle and the rotation time of the knob is smaller than a first preset time;
if yes, generating a mute signal.
4. The control method of a rotation control device according to claim 3, wherein the preset angle is 80 to 100 °, and the first preset time is 0.2 to 0.5 s.
5. A sound system comprising a rotary control device as claimed in any one of claims 1 to 2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561192.XA CN113934255B (en) | 2021-12-20 | 2021-12-20 | Rotation control device, control method, and audio system |
| PCT/CN2022/101394 WO2023115869A1 (en) | 2021-12-20 | 2022-06-27 | Rotary control device, control method, and sound system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561192.XA CN113934255B (en) | 2021-12-20 | 2021-12-20 | Rotation control device, control method, and audio system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113934255A CN113934255A (en) | 2022-01-14 |
| CN113934255B true CN113934255B (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111561192.XA Active CN113934255B (en) | 2021-12-20 | 2021-12-20 | Rotation control device, control method, and audio system |
Country Status (2)
| Country | Link |
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| CN (1) | CN113934255B (en) |
| WO (1) | WO2023115869A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113934255B (en) * | 2021-12-20 | 2022-03-08 | 广州朗国电子科技股份有限公司 | Rotation control device, control method, and audio system |
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| CN101250888A (en) * | 2007-02-21 | 2008-08-27 | 神钢建设机械株式会社 | Rotation control device and working machine therewith |
| CN101559778A (en) * | 2009-05-25 | 2009-10-21 | 济南铁路天龙高新技术开发有限公司 | Shock resistant continuous measurement type shift contactor |
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| CN213905218U (en) * | 2020-11-05 | 2021-08-06 | 歌尔科技有限公司 | Electronic equipment and rotary key thereof |
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| CN103489668A (en) * | 2013-09-27 | 2014-01-01 | 安庆三维电器有限公司 | Combination switch |
| US20180266172A1 (en) * | 2017-03-14 | 2018-09-20 | Biofilm Ip, Llc | Garage door systems and methods |
| CN109617548B (en) * | 2018-12-07 | 2022-08-30 | 业成科技（成都）有限公司 | Touch control knob device capable of being attached to curved surface |
| WO2021000149A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Vehicle-mounted rotary knob |
| CN213277903U (en) * | 2020-10-21 | 2021-05-25 | 浙江奥科半导体有限公司 | Non-contact flying shuttle controller |
| CN213814444U (en) * | 2021-01-27 | 2021-07-27 | 北京小米移动软件有限公司 | Gear adjusting device and gear adjustable equipment |
| CN113934255B (en) * | 2021-12-20 | 2022-03-08 | 广州朗国电子科技股份有限公司 | Rotation control device, control method, and audio system |
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2021
- 2021-12-20 CN CN202111561192.XA patent/CN113934255B/en active Active
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2022
- 2022-06-27 WO PCT/CN2022/101394 patent/WO2023115869A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250888A (en) * | 2007-02-21 | 2008-08-27 | 神钢建设机械株式会社 | Rotation control device and working machine therewith |
| CN101559778A (en) * | 2009-05-25 | 2009-10-21 | 济南铁路天龙高新技术开发有限公司 | Shock resistant continuous measurement type shift contactor |
| CN102403153A (en) * | 2011-12-01 | 2012-04-04 | 珠海市敏夫光学仪器有限公司 | Rotary multiple-gear switch |
| CN103226358A (en) * | 2012-12-20 | 2013-07-31 | 徐州泰诺仕视觉科技有限公司 | Mechanical probe control device |
| CN108983869A (en) * | 2018-07-26 | 2018-12-11 | 江苏圣龙智能科技有限公司 | A kind of rotating disc type controller for key lockset |
| CN213905218U (en) * | 2020-11-05 | 2021-08-06 | 歌尔科技有限公司 | Electronic equipment and rotary key thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113934255A (en) | 2022-01-14 |
| WO2023115869A1 (en) | 2023-06-29 |
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