CN114509930A - Electronic watch crown module and electronic equipment - Google Patents
Electronic watch crown module and electronic equipment Download PDFInfo
- Publication number
- CN114509930A CN114509930A CN202111591100.2A CN202111591100A CN114509930A CN 114509930 A CN114509930 A CN 114509930A CN 202111591100 A CN202111591100 A CN 202111591100A CN 114509930 A CN114509930 A CN 114509930A
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- rotating shaft
- electromagnetic induction
- crown module
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- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000004907 flux Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 208000033897 Systemic primary carnitine deficiency Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 208000016505 systemic primary carnitine deficiency disease Diseases 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G17/00—Structural details; Housings
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G21/00—Input or output devices integrated in time-pieces
- G04G21/02—Detectors of external physical values, e.g. temperature
- G04G21/025—Detectors of external physical values, e.g. temperature for measuring physiological data
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G21/00—Input or output devices integrated in time-pieces
- G04G21/08—Touch switches specially adapted for time-pieces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Physiology (AREA)
- Electric Clocks (AREA)
Abstract
The invention discloses an electronic watch crown module and electronic equipment, comprising: the electromagnetic induction device comprises a shell forming an accommodating space, a rotating shaft penetrating through the shell, and a magnetic assembly and an electromagnetic induction assembly accommodated in the accommodating space; the magnetic assembly comprises an annular magnet arranged on the rotating shaft, the annular magnet is magnetized along the radial direction of the annular magnet, and the annular magnet and the rotating shaft are coaxially arranged; the electromagnetic induction subassembly includes C type iron core and twines the coil on it, and C type iron core is equipped with the breach, and a part of ring magnet is located breach department to make the coil be located the magnetic field that the ring magnet formed, when rotating the pivot, the ring magnet moves for the coil, and the coil generates the induced electromotive force, so that the electromagnetic induction subassembly gathers the rotational speed and/or the angle of pivot. The electronic crown module has lower requirements on processing precision and assembling precision, reduces the production difficulty, improves the product yield and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of intelligent wearable equipment. And more particularly, to a crown module and an electronic device.
Background
With the development of electronic technology, more and more intelligent wearable devices, especially intelligent watches, gradually come into people's lives, and crowns are important input components of intelligent watches, one of which is used for key operation and the other is used for rotation operation. At present, the crown is usually rotated in an optical mode, for example, a grating disc is arranged on a rotating shaft of the crown and used for measuring the angle and the angular displacement of the rotating shaft, and the requirement of the structure on the processing precision and the assembly precision of a zero device is very high, so that the production yield of the crown is low.
Disclosure of Invention
The invention aims to provide a crown module and an electronic device. The electronic crown module has lower requirements on processing precision and assembly precision, and the product yield is higher.
According to an aspect of the present invention, there is provided a crown module including: the electromagnetic induction type electromagnetic switch comprises a shell forming an accommodating space, a rotating shaft penetrating through the shell, and a magnetic assembly and an electromagnetic induction assembly accommodated in the accommodating space;
the magnetic assembly comprises an annular magnet fixed on the rotating shaft, the annular magnet is magnetized along the radial direction of the annular magnet, and the annular magnet and the rotating shaft are coaxially arranged;
the electromagnetic induction assembly comprises a C-shaped iron core and a coil wound on the C-shaped iron core, the C-shaped iron core is provided with a notch, a part of the annular magnet is located at the notch, so that the coil is located in a magnetic field formed by the annular magnet, when the rotating shaft is rotated, the annular magnet moves relative to the coil, and the coil generates induced electromotive force, so that the electromagnetic induction assembly acquires the rotating speed and/or the angle of the rotating shaft.
Preferably, the magnetic assembly further comprises a support disc fixedly connected with the rotating shaft, and the annular magnet is arranged on the surface of the support disc.
Preferably, the electromagnetic induction assembly further comprises a flexible circuit board, an upper cover and a lower cover which enclose to form an accommodating cavity, the C-shaped iron core and the coil are located in the accommodating cavity, the coil is connected with a processor unit on the flexible circuit board, and the processor unit and the coil form a loop so that the processor unit collects induced current signals of the coil.
Preferably, the coils include a first coil and a second coil connected in series, and the first coil and the second coil are respectively wound on both sides of the C-shaped iron core.
Preferably, a plurality of magnets are arranged side by side on the support disc to form the annular magnet, the magnetic pole direction of the magnets is arranged along the radial direction of the support disc, and the magnetic poles of the adjacent magnets are arranged oppositely.
Preferably, a plurality of magnets are arranged side by side on the support disc to form the annular magnet, the magnetic pole directions of the magnets are arranged along the radial direction of the support disc, the magnetic poles of the adjacent magnets are the same, and the magnetic field strengths of the adjacent magnets are different.
Preferably, the rotating shaft is provided with a cap at one end outside the shell, a conducting strip connected with the processor unit is embedded on the inner side surface of the shell, and a fixing piece in contact with the conducting strip is arranged on the rotating shaft, so that the cap is electrically connected with the processor unit.
Preferably, the other end of the rotating shaft is located in the shell, the rotating shaft can move along the axis direction of the rotating shaft, a key is arranged in the shell, and the other end of the rotating shaft triggers the key through the axial movement of the rotating shaft.
Preferably, the rotating shaft is provided with an elastic element for driving the rotating shaft to move axially.
According to an aspect of the present invention, an electronic device is provided, which includes the above-mentioned electronic crown module.
The invention has the following beneficial effects:
according to the electronic crown module, the annular magnet moves relative to the coil of the electromagnetic induction component, so that the electromagnetic induction component acquires the rotating speed and/or the angle of the rotating shaft, the requirements on machining precision and assembling precision are lowered, the production difficulty is lowered, the product yield is improved, and the production cost is lowered.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view showing a structure of a crown module of an electronic timepiece of the invention.
Fig. 2 is a schematic exploded view of the electronic timepiece crown module of the present invention.
Fig. 3 is a sectional view showing the crown module of the present invention.
Fig. 4 is a partial schematic structural view of the crown module of the electronic timepiece of the invention.
Fig. 5 shows an exploded view of the electromagnetic induction component of the crown module of the watch of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Some embodiments of the present disclosure include a crown module that can be incorporated into a portable electronic device to provide input. The portable electronic device may be a smart wearable device, which in some embodiments is a smart watch, smart bracelet, or the like that can be worn on the wrist of the user.
In one embodiment of the electronic timepiece crown module of the invention shown in fig. 1 and 2, the electronic timepiece crown module includes a case 10, a rotation shaft 20, a magnetic element 30, and an electromagnetic induction element 40, wherein a housing space is formed in the case 10, and the magnetic element 30 and the electromagnetic induction element 40 are housed in the housing space. The rotating shaft 20 penetrates through the shell 10, the rotating shaft 20 can rotate around the axis of the rotating shaft 20, the electromagnetic induction component 40 is fixedly arranged in the shell 10, the magnetic component 30 is fixedly connected with the rotating shaft 20, when the rotating shaft 20 is rotated, the magnetic component 30 moves relative to the electromagnetic induction component 40, namely, a magnetic field formed by the magnetic component 30 moves relative to the electromagnetic induction component 40, the electromagnetic induction component 40 generates electromotive force according to an electromagnetic induction phenomenon, and if the electromagnetic induction component 40 is closed to form a loop, induced current is formed. The electromagnetic induction component 40 can acquire the rotation speed and/or rotation angle of the rotating shaft 20 according to the induced current or electromotive force, thereby providing one or more types of input to the electronic device.
In the present embodiment, the magnetic assembly 30 includes the ring magnet 32, the ring magnet 32 is magnetized in a radial direction thereof, and the ring magnet 32 is disposed in a radial direction of the rotating shaft 20, that is, the ring magnet 32 is disposed coaxially with the rotating shaft 20, and the ring magnet 32 can be rotated by rotating the rotating shaft 20.
The electromagnetic induction assembly 40 comprises a coil 41 and a C-shaped iron core 44, and since the coil 41 needs to be connected with the processor unit, the electromagnetic induction assembly 40 is fixedly connected with the housing 10, and the condition that the coil 41 affects the electrical connection during the rotation process is avoided. The C-shaped core 44 has a gap 441, and a portion of the ring magnet 44 is located at the gap 441, and when the ring magnet 32 rotates, a magnetic field around the coil 41 periodically changes, and a magnetic flux passing through the coil 41 changes, so that an induced electromotive force is generated in the coil 41.
Specifically, the magnetic assembly 30 further includes a supporting plate 31, and the supporting plate 31 is shaped like a disk and is coaxially and fixedly connected to the rotating shaft 20, so that the supporting plate 31 rotates together with the rotating shaft 20. The ring magnet 32 is disposed on the support plate 31, the coil 41 is located in a magnetic field formed by the ring magnet 32, and when the rotation shaft 20 is rotated, the plurality of magnets are rotated together with the support plate 31, the magnetic field around the coil 41 is periodically changed, and a magnetic flux passing through the coil 41 is changed, thereby generating an induced electromotive force in the coil 41.
As shown in fig. 5, the electromagnetic induction assembly 40 further includes an upper cover 42, a lower cover 43 and a flexible circuit board 45, the upper cover 42 and the lower cover 43 enclose to form an accommodating cavity, the coil 41 is wound on the C-shaped iron core 44, and the two are accommodated in the accommodating cavity together. The lower cover 43 and the flexible circuit board 45 are fixed in the housing 10, and the C-shaped core 44 is fixedly attached to the lower cover 43. The upper cover 42 and the lower cover 43 may be made of a magnetic shielding material, such as commercially available SPC series magnetic shielding material, which is made of steel. Wherein, the first English letter in the English abbreviation SPC represents the material, namely S (English full name: Steel) represents the Steel material; the second SPC English letter represents the shape kind usage, i.e., P (English full name: Plate) represents the Plate; the third English letter represents the kind of steel, namely C (full English: Cold) represents Cold rolling. The SPC series products comprise SPCE, SPCD and other products with different brands, wherein the fourth English letter represents the stamping level, for example, E (English full name: Elongation) represents the deep-drawing level; and D (full name: deep draw) represents a deep drawing stage.
The coil 41 is placed in the accommodating cavity, so that external magnetic field interference can be avoided, the coil 41 is wound on the C-shaped iron core 44, and the C-shaped iron core 44 is arranged close to the annular magnet 32, so that magnetic induction lines penetrating through the coil 41 are dense, and the magnetic field change of the magnet can be accurately picked up. The flexible circuit board 45 is further provided with a processor unit, and the processor unit and the coil 41 are closed to form a loop, so that the processor unit can collect the induced current generated by the coil 41.
In the present embodiment, the C-shaped core 44 is configured as a C-shaped core, one side of the C-shaped core 44 is provided with a notch 441, the coil 41 includes a first coil 411 and a second coil 412 connected in series, and the first coil 411 and the second coil 412 are respectively wound on two sides of the C-shaped core 44, so that induced currents are generated in both the first coil 411 and the second coil 412, and the detection accuracy of the processor unit is improved. The upper cover 42 and the lower cover 43 are provided with openings corresponding to the notches 441.
As shown in fig. 3 and 4, a plurality of magnets are arranged side by side on the support disc 31 to form a ring magnet 32, and a magnetic pole direction of each of the magnets is arranged in a radial direction of the support disc 31, that is, a magnetizing direction of the ring magnet 32 is magnetized in the radial direction of the support disc 31. The supporting disk 31 is disposed coaxially with the rotating shaft 20, a portion of the annular magnet 32 is located at the notch 441 of the C-shaped iron core 44, and when the rotating shaft 20 rotates, a portion of the magnetic ring 32 is always located at the notch 441, that is, the annular magnet 32 always passes through the notch 441 when rotating. Because a gap is formed between the annular magnet 32 and the C-shaped iron core 44, the annular magnet and the C-shaped iron core are not in direct contact, the requirements on the machining precision and the assembling precision are low, the production difficulty is reduced, the product yield is improved, and the production cost is reduced.
In the present embodiment, the magnetic poles of the adjacent magnets are opposite, that is, the NS poles of the adjacent magnets are opposite, when the ring magnet 32 rotates, the direction of the magnetic flux passing through the coil 41 is changed alternately, so that the coil 41 generates a periodically changing induced current, and the processor unit obtains the rotation speed and/or angle of the rotating shaft 20 according to the periodically changing current, and further obtains one or more input signals. The ring magnet 32 with such a structure can enable the coil 41 to generate a larger current, so that the processor unit can obtain a more accurate rotating speed or angle value. Preferably, the ring magnet 32 may be formed on the surface of the support plate 31 by printing or coating.
In some embodiments, the adjacent magnets have the same magnetic pole, that is, the adjacent magnets have the same NS pole, and the adjacent magnets have different magnetic field strengths, so that the magnetic flux passing through the coil 41 changes alternately, and the coil 41 generates a periodically changing induced current, and the processor unit obtains the rotation speed and/or angle of the rotating shaft 20 according to the periodically changing current, and further obtains one or more input signals. The annular magnet 32 with the structure has low processing difficulty and is convenient to produce and manufacture.
The crown module of the present invention rotates the ring magnet 32 by the rotation shaft, so that the magnetic flux passing through the coil 41 is kept changed, and the coil 41 generates electromotive force. Since the coil 41 and the processor unit on the flexible circuit board 45 form a loop, the electromotive force drives electrons to flow, a periodic current is generated in the coil 41, so that the processor unit obtains the rotation speed and/or angle of the rotating shaft 20 according to the current, and further obtains one or more input signals, which can be used for controlling the switching or selection of screen display information, for example, by rotating the rotating shaft 20, a page can be scrolled on a screen of a smart watch or different application programs can be selected.
As shown in fig. 3, the rotating shaft 20 is disposed through the casing 10, one end of the rotating shaft 20 is located outside the casing 10, and a cap 21 is disposed at the end of the rotating shaft 20, an annular fixing plate 22 is further sleeved on the rotating shaft 20, a conductive sheet 11 is embedded on the inner surface of the casing 10, the fixing plate 22 contacts with the conductive sheet 11, and the conductive sheet 11 is connected to the processor unit on the flexible circuit board 45. The cap 21, the rotation shaft 20, the fixing piece 22 and the conductive piece 11 are made of conductive metal materials, thereby achieving electrical connection of the cap 21 and the processor unit.
In some embodiments, the cap 21 can be used as a tactile switch, for example, by touching the cap 21 with a finger of a user, waking up a lighting control screen, and then rotating the cap 21 to select an application program, so as to avoid operating the device when another object rotates the cap 21, and avoid the problem of misoperation. That is, the cap 21 can be rotated to operate the device only after the user's finger has established electrical connection with the processor unit.
In some embodiments, the cap 21 may be used as an electrode for acquiring electrical parameters of the body of the user, for example, the smart wearable device may comprise a first user contact position and the cap 21 forms a second user contact position when touched by the user, both contact positions may create an electrical path between the user and the device allowing the processor unit of the device to sense electrical parameters of the user, such as the electrical activity of the heart, e.g. heart rate, electrocardiogram, etc.
As shown in fig. 2 and fig. 3, the other end of the rotating shaft 20 is located in the casing 10, and the rotating shaft 20 can move along the axial direction thereof, a key 12 is disposed in the casing 10, and the key 12 is fixed on the inner side wall of the casing 10 and located in the axial direction of the rotating shaft 20. The other end of the shaft 20 may activate the key 12 by axial movement of the shaft 20.
Pressing cap 21 not only can realize the trigger to button 12 along axial displacement pivot 20, can also produce magnetic field change information through rotating cap 21 to through the signal of coil 41 output according to the conversion of received magnetic field change information, different output signal can be used for the switching or the selection of controlgear screen display information, compare in the mode that sets up of touch-sensitive screen, the function integration degree of the electronic watch crown that this embodiment provided improves, and the use is more convenient.
Further, the rotating shaft 20 is provided with an elastic element 23, specifically, the elastic element 23 is a spring sleeved outside the rotating shaft 20, one end of the spring abuts against the housing 10, and the other end abuts against the rotating shaft 20. After the cap 21 is pressed by a user to drive the rotating shaft 20 to move towards the right side to trigger the key 12, the elastic element 23 drives the rotating shaft 20 towards the left side to move to release the trigger on the key 12, namely the elastic element 23 drives the rotating shaft 20 to separate from the key 12, and power for resetting the rotating shaft 20 is provided. At this time, the fixing plate 22 contacts the conductive sheet 11 on the housing 10, and the fixing plate 22 can prevent the rotating shaft 20 from moving to the left, so as to limit the axial movement of the rotating shaft 20.
The invention also discloses electronic equipment comprising the electronic crown module, wherein the electronic crown module is connected to the side wall of the shell of the electronic equipment.
In some embodiments, the electronic device can be operated by the user by pressing or rotating the cap 21 of the crown module.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. An electronic crown module, comprising: the electromagnetic induction type electromagnetic switch comprises a shell forming an accommodating space, a rotating shaft penetrating through the shell, and a magnetic assembly and an electromagnetic induction assembly accommodated in the accommodating space;
the magnetic assembly comprises an annular magnet fixed on the rotating shaft, the annular magnet is magnetized along the radial direction of the annular magnet, and the annular magnet and the rotating shaft are coaxially arranged;
the electromagnetic induction assembly comprises a C-shaped iron core and a coil wound on the C-shaped iron core, the C-shaped iron core is provided with a notch, a part of the annular magnet is located at the notch, so that the coil is located in a magnetic field formed by the annular magnet, when the rotating shaft is rotated, the annular magnet moves relative to the coil, and the coil generates induced electromotive force, so that the electromagnetic induction assembly acquires the rotating speed and/or the angle of the rotating shaft.
2. The crown module of claim 1, wherein the magnetic assembly further comprises a support plate fixedly connected to the shaft, and the annular magnet is disposed on a surface of the support plate.
3. The crown module according to claim 2, wherein the electromagnetic induction assembly further comprises a flexible circuit board, and an upper cover and a lower cover enclosing to form a containing cavity, the C-shaped iron core and the coil are located in the containing cavity, the coil is connected with a processor unit on the flexible circuit board, and the processor unit and the coil form a loop so that the processor unit collects signals induced by the coil.
4. The crown module according to claim 3, wherein the coil includes a first coil and a second coil connected in series, the first coil and the second coil being wound on both sides of the C-shaped core, respectively.
5. The crown module according to claim 2, wherein a plurality of magnets are arranged side by side on the support disk to form the annular magnet, the magnetic poles of the magnets being arranged in the radial direction of the support disk and the magnetic poles of adjacent magnets being arranged in opposition.
6. The crown module according to claim 2, wherein a plurality of magnets are arranged side by side on the support disk to form the annular magnet, the magnetic pole directions of the magnets are arranged in the radial direction of the support disk, the magnetic poles of adjacent magnets are the same, and the magnetic field strengths are different.
7. The crown module according to claim 3, wherein a cap is provided at an end of the shaft located outside the case, a conductive plate connected to the processor unit is fitted on an inner surface of the case, and a fixing piece is provided on the shaft to be in contact with the conductive plate, so that the cap is electrically connected to the processor unit.
8. The electronic crown module according to claim 7, wherein the other end of the rotary shaft is located in the case, and the rotary shaft is movable in the axial direction thereof, and a button is provided in the case, and the other end of the rotary shaft activates the button by the axial movement of the rotary shaft.
9. The crown module according to claim 8, wherein the shaft is provided with an elastic member for driving the shaft to move axially.
10. An electronic device comprising the crown module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591100.2A CN114509930B (en) | 2021-12-23 | 2021-12-23 | Electronic watch crown module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111591100.2A CN114509930B (en) | 2021-12-23 | 2021-12-23 | Electronic watch crown module and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114509930A true CN114509930A (en) | 2022-05-17 |
| CN114509930B CN114509930B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111591100.2A Active CN114509930B (en) | 2021-12-23 | 2021-12-23 | Electronic watch crown module and electronic equipment |
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| Country | Link |
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| CN (1) | CN114509930B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD996252S1 (en) * | 2021-01-22 | 2023-08-22 | Shenzhen DO Intelligent Technology Co., Ltd. | Crown of smart watch |
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|---|---|---|---|---|
| US3657685A (en) * | 1968-02-10 | 1972-04-18 | Rafi Raimund Finsterholze Elek | Non-contacting limit switch |
| JPH06209536A (en) * | 1993-01-06 | 1994-07-26 | Toshiba Corp | Magnetic fluid shaft seal device |
| JP2013197786A (en) * | 2012-03-19 | 2013-09-30 | Casio Comput Co Ltd | Sensitivity adjustment device and radio wave communication device |
| CN103529234A (en) * | 2013-09-30 | 2014-01-22 | 江阴众和电力仪表有限公司 | Device for detecting revolution speed of nuclear-stage main pump |
| CN110198063A (en) * | 2019-06-25 | 2019-09-03 | 歌尔股份有限公司 | A kind of magnet attraction charging fixing device, wrist-watch and wrist-watch charging system |
| CN110249145A (en) * | 2016-11-17 | 2019-09-17 | 通用电气(Ge)贝克休斯有限责任公司 | Roll the thrust active magnetic bearings of control slowly for axis |
| CN213042828U (en) * | 2020-11-06 | 2021-04-23 | 歌尔科技有限公司 | Electronic equipment and electromagnetic type rotary pressing key thereof |
| CN112965362A (en) * | 2019-12-12 | 2021-06-15 | 华为技术有限公司 | Device for operating wearable equipment |
-
2021
- 2021-12-23 CN CN202111591100.2A patent/CN114509930B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3657685A (en) * | 1968-02-10 | 1972-04-18 | Rafi Raimund Finsterholze Elek | Non-contacting limit switch |
| JPH06209536A (en) * | 1993-01-06 | 1994-07-26 | Toshiba Corp | Magnetic fluid shaft seal device |
| JP2013197786A (en) * | 2012-03-19 | 2013-09-30 | Casio Comput Co Ltd | Sensitivity adjustment device and radio wave communication device |
| CN103529234A (en) * | 2013-09-30 | 2014-01-22 | 江阴众和电力仪表有限公司 | Device for detecting revolution speed of nuclear-stage main pump |
| CN110249145A (en) * | 2016-11-17 | 2019-09-17 | 通用电气(Ge)贝克休斯有限责任公司 | Roll the thrust active magnetic bearings of control slowly for axis |
| CN110198063A (en) * | 2019-06-25 | 2019-09-03 | 歌尔股份有限公司 | A kind of magnet attraction charging fixing device, wrist-watch and wrist-watch charging system |
| CN112965362A (en) * | 2019-12-12 | 2021-06-15 | 华为技术有限公司 | Device for operating wearable equipment |
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| Title |
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| 张静: "感应电机弱磁控制归一化设计与动态性提升策略研究", 《中国硕士博士学位论文全文数据库基础科学辑》, pages 1 - 75 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD996252S1 (en) * | 2021-01-22 | 2023-08-22 | Shenzhen DO Intelligent Technology Co., Ltd. | Crown of smart watch |
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| CN114509930B (en) | 2023-10-31 |
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