WO2021128788A1 - Dispositif de vibration et produit électronique - Google Patents

Dispositif de vibration et produit électronique Download PDF

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Publication number
WO2021128788A1
WO2021128788A1 PCT/CN2020/099545 CN2020099545W WO2021128788A1 WO 2021128788 A1 WO2021128788 A1 WO 2021128788A1 CN 2020099545 W CN2020099545 W CN 2020099545W WO 2021128788 A1 WO2021128788 A1 WO 2021128788A1
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WO
WIPO (PCT)
Prior art keywords
coil
vibration device
assembly
vibration
vibrator assembly
Prior art date
Application number
PCT/CN2020/099545
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English (en)
Chinese (zh)
Inventor
史德璋
毛东升
Original Assignee
歌尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2021128788A1 publication Critical patent/WO2021128788A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
    • H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems

Definitions

  • the present invention relates to the technical field of electronic products, in particular to a vibration device and an electronic product.
  • Vibration devices usually achieve reciprocating and regular vibration through vibration components.
  • the vibration experience is not only reflected in the natural frequency and vibration acceleration, but also in its response speed (that is, the time for the product's vibration frequency to rise and fall).
  • the performance parameters of the response speed of the vibration device are affected by the damping of the designed product. For example, due to the inherent simple harmonic vibration characteristics of a linear vibration motor, its own internal damping is insufficient to meet the requirements of the take-off and landing time, so external damping is needed to make the start and stop time shorter, so that the vibration can reach a steady state displacement. Controlled and more reliable.
  • the damping of the existing vibration device is generally foam, silica gel, magnetic fluid, etc.
  • This type of damping has the defects of nonlinearity, poor damping controllability, easy fatigue damage, poor durability, large damping sound, and difficulty in assembly.
  • the stability of magnetic fluid is poor in an environment with alternating high and low temperatures, and the foam cells of silica gel or foam are prone to irreversible deformation in a high temperature environment. Therefore, the damping of the existing vibration device is greatly affected by the product assembly accuracy, the product performance consistency is relatively poor, and the stability of the damping characteristic is poor in an alternating high and low temperature environment, which easily leads to a reduction in the reliability of the product.
  • An object of the present invention is to provide a new technical solution for a vibration device and an electronic product.
  • a vibration device including:
  • a housing the housing having a cavity
  • a vibrator assembly the vibrator assembly is arranged in a cavity, and the vibrator assembly includes a permanent magnet;
  • stator assembly the stator assembly is arranged in a cavity, and the stator assembly includes a coil assembly
  • the coil assembly includes at least one coil and at least one ring frame, the ring frame is sleeved outside the coil, and the permanent magnet and the coil cause the vibrator assembly to reciprocate through electromagnetic action; the ring frame is made of Conductive and non-magnetically conductive material, the ring frame is configured to obstruct the vibration of the vibrator assembly.
  • the middle of the coil has a through hole
  • the coil assembly further includes a core
  • the core is embedded in the through hole of the coil
  • the material of the core is conductive and non-magnetic, so The core is configured to hinder the vibration of the vibrator assembly.
  • the conductive and non-magnetic conductive material includes one of copper, aluminum, and nickel-chromium alloy.
  • the vibrator assembly further includes a counterweight, and the counterweight is connected to the permanent magnet.
  • a accommodating cavity is provided on the counterweight, and the permanent magnet is arranged in the accommodating cavity.
  • two elastic elements are provided, and the two elastic elements are respectively located on both sides of the counterweight along the vibration direction of the vibrator assembly.
  • the elastic element is a V-shaped elastic sheet.
  • the vibration device further includes a magnetic conductive plate, and the magnetic conductive plate is connected to the permanent magnet.
  • the vibration device further includes an FPC, and the FPC is connected to the coil assembly.
  • an electronic product including the above-mentioned vibration device.
  • the ring frame and the coil are fixed as a part of the stator assembly, which is equivalent to making the ring frame relative to the vibrator assembly. Reverse movement, so the ring frame can generate motional electromotive force under the moving magnetic field, thereby generating induced current, which can react to the vibrator assembly, thereby generating a damping effect on the vibrator assembly, so that the start-up and braking time of the vibrating device is short, Reduce the noise of the vibration device.
  • the ring frame made of conductive and non-magnetic material used in the embodiment of the present invention has the advantage of strong performance stability in an alternating high and low temperature environment, and greatly Improve the consistency of product performance.
  • Fig. 1 is a schematic diagram of an exploded structure of a vibration device provided by the present invention
  • FIG. 2 is a schematic cross-sectional structure diagram of a vibration device provided by the present invention.
  • FIG. 3 is a schematic diagram of a part of the structure of a vibration device provided by the present invention.
  • Fig. 4 is a partial structural diagram 1 of a vibrating device corresponding to two coils
  • FIG. 5 is a second schematic diagram of a part of the structure of a vibration device corresponding to two coils
  • Fig. 6 is a schematic diagram of permanent magnets and coils corresponding to two coils.
  • the vibration device includes a housing, and the housing has a cavity; the vibration device also includes a vibrator assembly, a stator assembly, and an elastic element, The vibrator assembly is arranged in a cavity, the vibrator assembly includes a permanent magnet 1; the stator assembly is arranged in the cavity, and the stator assembly includes a coil 2 assembly; the vibrator assembly is suspended in the cavity through the elastic element In the cavity; the coil 2 assembly includes at least one coil 2 and at least one ring frame 3, the ring frame 3 is sleeved on the outside of the coil 2, the permanent magnet 1 and the coil 2 make the vibrator assembly through electromagnetic action A reciprocating vibration is generated; the material of the ring frame 3 is a conductive and non-magnetic material, and the ring frame 3 is configured to hinder the vibration of the vibrator assembly.
  • a ring frame 3 made of conductive and non-magnetic material is sheathed outside the coil 2.
  • the coil 2 is located in the magnetic field generated by the permanent magnet 1 to cut the magnetic line of induction.
  • the permanent magnet 1 can interact to generate the Lorentz force.
  • the permanent magnet 1 is used to form a magnetic field.
  • the permanent magnet 1 can be a ferrite magnet or a neodymium iron boron magnet.
  • the shape of the permanent magnet 1 can be designed according to actual needs, as long as it is easy to process, for example, cuboid, cylinder, Prism and so on.
  • the vibrator assembly generates reciprocating motion under the action of the Lorentz force and the restoring force of the elastic element.
  • the ring frame 3 and the coil 2 are fixed as part of the stator assembly, which is equivalent to moving in the opposite direction relative to the vibrator assembly. Therefore, the ring frame 3 can generate motional electromotive force under the moving magnetic field, thereby generating an induced current. It can react on the vibrator assembly to produce a damping effect on the vibrator assembly, so that the start-up and braking time of the vibrating device is short, and the noise of the vibrating device is reduced.
  • the ring frame 3 made of conductive and non-magnetic materials used in the embodiment of the present invention has the advantage of strong performance stability in an alternating high and low temperature environment. Greatly improve the consistency of product performance.
  • the coil 2 bracket can also play a role of limiting and protecting the coil 2.
  • the middle of the coil 2 has a through hole, the coil 2 is wound by a wire in one direction to form a closed ring structure, and the middle of the through hole is surrounded by a coil
  • the wiring area of 2 refers to the area through which the leads in the coil 2 actually pass, and the entire wiring area is ring-shaped.
  • the coil 2 assembly further includes a core 4 embedded in the through hole of the coil 2.
  • the core 4 is made of conductive and non-magnetic material, and the core 4 is configured to obstruct The vibration of the vibrator assembly.
  • the core 4 made of conductive and non-magnetic material can play the same role as the ring frame 3.
  • the core 4 can strengthen the induction effect of the motional electromotive force, thereby increasing the reaction force to the permanent magnet 1, thereby enhancing the The damping effect of the vibrator assembly.
  • ring frame 3 and the core 4 in the embodiment of the present invention are also applicable to the solution of multiple driving coils.
  • a ring frame 3 can be sleeved on the outside of the coil 2 and the coil 2', and the through holes of the coil 2 and the coil 2' A core 4 is embedded in each; as shown in FIG. 5, a ring frame 3 can also be provided.
  • the ring frame 3 has two ring-shaped through holes that match the coil 2 and the coil 2', the coil 2 and the coil. 2'are respectively arranged in the two annular through holes, and a core 4 is embedded in each of the through holes of the coil 2 and the coil 2'.
  • Fig. 6 in the vibrating device provided with two coils (coil 2 and coil 2'), there are three sets of permanent magnets corresponding to the two coils, which are the permanent magnets 1-1 shown in Fig. 6 respectively. Magnet 1-2 and permanent magnet 1-3.
  • the arrow direction in Fig. 6 represents the magnetizing direction of each permanent magnet.
  • the current directions of the coil 2 and the coil 2' are opposite. Therefore, as shown in Fig. 4, the current directions of the two ring frames 3 are also opposite; as shown in Fig. 5 As shown, the directions of the current around the two annular through holes of the ring frame 3 are also opposite.
  • the conductive and non-magnetic material includes one of copper, aluminum, and nickel-chromium alloy. Copper, aluminum, and nickel-chromium alloys are conductive and non-magnetic materials with low cost, which is helpful for cost control in quantitative production.
  • the materials of the ring frame 3 and the core 4 are not limited to copper, aluminum, and nickel-chromium alloys, as long as they meet the conductive and non-magnetic properties.
  • the vibrator assembly further includes a counterweight 5, and the counterweight 5 is connected to the permanent magnet 1.
  • the counterweight 5 is used to increase the inertia of the vibrator assembly to improve the vibration feeling, and the counterweight 5 is made of a magnetically permeable material.
  • the counterweight 5 is provided with a containing cavity 51, and the permanent magnet 1 is arranged in the containing cavity 51.
  • the arrangement of the accommodating cavity 51 is conducive to the miniaturization, light and thin design of the vibration device.
  • two elastic elements are provided, and the two elastic elements are respectively located on both sides of the counterweight 5 along the vibration direction of the vibrator assembly.
  • the elastic element can produce damping and buffering effects, and provide restoring force and buffering effects for the vibration of the vibrator assembly.
  • the elastic element is a V-shaped elastic piece 6, one side of the V-shaped elastic piece 6 is connected with the counterweight 5, and the other side is connected with the inner side wall of the housing.
  • the two sides of the counterweight 5 along the vibrating direction of the vibrator assembly may be designed as a wedge shape that is adapted to the shape of the V-shaped elastic piece 6. That is, the thickness of the part where the side of the weight 5 connects with the opening of the V-shaped elastic piece 6 is relatively large, and the thickness of the part where the side of the weight 5 connects with the connection part of the V-shaped elastic piece 6 is relatively thin. This design can avoid the V-shaped shrapnel 6, which makes the V-shaped shrapnel 6 extend and shrink wider.
  • the elastic element is not limited to the V-shaped elastic sheet 6, and may also be elastic sheets of other shapes and structures, and may also be elastic rubber parts, springs, and the like.
  • the vibration device further includes a magnetically conductive plate 7, and the magnetically conductive plate 7 is connected to the permanent magnet 1.
  • the magnetic conductive plate 7 is made of magnetic conductive material, such as SUS-430. The magnetic conductive plate 7 converges and concentrates the magnetic field generated by the permanent magnet 1, and corrects and gathers the magnetic induction lines emitted by the permanent magnet 1, thereby increasing the strength of the magnetic field and reducing magnetic leakage.
  • the vibration device further includes an FPC8, and the FPC8 is connected to the coil 2 assembly.
  • the FPC8 is used to conduct the coil 2 with an external circuit to transmit electrical signals.
  • the lead of the coil 2 is connected to the FPC8, and the FPC8 is connected to the main control chip.
  • the setting of FPC8 can make the signal transmission effect of the vibration device better and have a long service life.
  • the housing includes an upper housing 9 and a lower housing 10.
  • the upper housing 9 is a cylindrical structure with one end open
  • the lower housing 10 is a plate-shaped structure and is covered
  • the FPC 8 is provided on the inner surface of the lower shell 10.
  • the shell of this structure is easy to process and facilitate the installation of the stator assembly and the vibrator assembly.
  • the shape of the entire casing is a rectangular parallelepiped.
  • the shape of the casing may also be an approximate rectangular parallelepiped shape, such as an ellipse, a racetrack, and the like.
  • the material of the shell can be but not limited to metal, plastic, ceramic, etc.
  • the upper shell 9 is made of a magnetically permeable material, and selecting the upper shell 9 of a magnetically permeable material can reduce magnetic leakage.
  • An embodiment of the present invention also provides an electronic product, which includes the above-mentioned vibration device.
  • the electronic product may be, for example, a mobile phone, a game console, a notebook computer, a wearable device, a walkie-talkie and other electronic devices.
  • the vibration device can be, for example, a linear vibration motor, or an exciter used to drive the screen of the mobile phone to vibrate and produce sound.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

Dispositif de vibration et produit électronique. Le dispositif de vibration comprend un boîtier, qui a une cavité. Le dispositif de vibration comprend en outre un ensemble vibreur, un ensemble stator et un élément élastique. L'ensemble vibreur est disposé dans la cavité, et l'ensemble vibreur comprend un aimant permanent (1). L'ensemble stator est disposé dans la cavité, et l'ensemble stator comprend un ensemble bobine. L'ensemble vibreur est suspendu dans la cavité au moyen de l'élément élastique. L'ensemble bobine comprend au moins une bobine (2) et au moins un cadre annulaire (3). Le cadre annulaire (3) est emmanché sur l'extérieur de la bobine (2). L'aimant permanent (1) et la bobine (2) amènent l'ensemble vibreur à générer une vibration alternative au moyen d'une action électromagnétique. Le matériau du cadre annulaire (3) est un matériau conducteur et non magnétique. Le cadre annulaire (3) est conçu pour empêcher la vibration de l'ensemble vibreur.
PCT/CN2020/099545 2019-12-25 2020-06-30 Dispositif de vibration et produit électronique WO2021128788A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911357352.1A CN111049349A (zh) 2019-12-25 2019-12-25 一种振动装置及电子产品
CN201911357352.1 2019-12-25

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WO2021128788A1 true WO2021128788A1 (fr) 2021-07-01

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WO (1) WO2021128788A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111049349A (zh) * 2019-12-25 2020-04-21 歌尔科技有限公司 一种振动装置及电子产品
CN111682729B (zh) * 2020-06-30 2022-03-25 歌尔股份有限公司 振动装置以及电子设备
CN114257037B (zh) * 2020-09-21 2023-08-04 北京小米移动软件有限公司 一种振动组件
CN112932933B (zh) * 2021-01-27 2023-12-12 深圳市文森特技术有限公司 往复运动机构
CN113809896A (zh) * 2021-09-06 2021-12-17 汉得利（常州）电子股份有限公司 一种微型触觉执行器及其加工方法

Citations (6)

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Publication number Priority date Publication date Assignee Title
JP2000004569A (ja) * 1998-06-12 2000-01-07 Tokin Corp 振動アクチュエータ
CN205490073U (zh) * 2016-01-04 2016-08-17 瑞声光电科技(常州)有限公司 振动电机
CN207475380U (zh) * 2017-11-08 2018-06-08 歌尔科技有限公司 线性振动马达
CN109889008A (zh) * 2019-03-15 2019-06-14 金龙机电（淮北）有限公司 一种线性振动器的阻尼结构及其阻尼控制方式
CN111049349A (zh) * 2019-12-25 2020-04-21 歌尔科技有限公司 一种振动装置及电子产品
CN211352007U (zh) * 2019-12-25 2020-08-25 歌尔科技有限公司 一种振动装置及电子产品

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000004569A (ja) * 1998-06-12 2000-01-07 Tokin Corp 振動アクチュエータ
CN205490073U (zh) * 2016-01-04 2016-08-17 瑞声光电科技(常州)有限公司 振动电机
CN207475380U (zh) * 2017-11-08 2018-06-08 歌尔科技有限公司 线性振动马达
CN109889008A (zh) * 2019-03-15 2019-06-14 金龙机电（淮北）有限公司 一种线性振动器的阻尼结构及其阻尼控制方式
CN111049349A (zh) * 2019-12-25 2020-04-21 歌尔科技有限公司 一种振动装置及电子产品
CN211352007U (zh) * 2019-12-25 2020-08-25 歌尔科技有限公司 一种振动装置及电子产品

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