WO2022041983A1 - 线性马达及电子终端 - Google Patents

线性马达及电子终端 Download PDF

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Publication number
WO2022041983A1
WO2022041983A1 PCT/CN2021/101764 CN2021101764W WO2022041983A1 WO 2022041983 A1 WO2022041983 A1 WO 2022041983A1 CN 2021101764 W CN2021101764 W CN 2021101764W WO 2022041983 A1 WO2022041983 A1 WO 2022041983A1
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WIPO (PCT)
Prior art keywords
heat
linear motor
mounting
conducting
installation
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Ceased
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PCT/CN2021/101764
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English (en)
French (fr)
Inventor
张成飞
毛东升
董宇航
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Goertek Inc
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Goertek Inc
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Filing date
Publication date
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Publication of WO2022041983A1 publication Critical patent/WO2022041983A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges

Definitions

  • the utility model relates to the technical field of electronic equipment, in particular to a linear motor and an electronic terminal.
  • linear motors With the continuous development of the field of intelligent interaction, the use of linear motors is becoming more and more extensive, and linear motors with new structures and reliable performance have become the priority of more large-scale terminal enterprises.
  • the coil When the linear motor is working, the coil will generate heat after it is energized. Poor heat dissipation will have a great impact on the working performance of the linear motor.
  • the current manufacturers do not pay much attention to the heat dissipation of the linear motor.
  • the main purpose of the present utility model is to propose a linear motor, which aims to improve the heat dissipation performance of the coil of the linear motor.
  • the linear motor proposed by the present utility model includes:
  • a vibrator including a magnet, the magnet is connected in the casing by an elastic connecting piece;
  • a mounting bracket mounted on the housing and including a heat conducting portion
  • a stator includes a coil at least partially connected to the heat conducting portion.
  • the heat-conducting portion is configured as a heat-conducting conductor.
  • the material of the heat conducting portion is a non-magnetic metal material.
  • the non-magnetic metal material is a copper material or a copper-containing non-magnetic alloy material.
  • the housing is provided with an installation opening, and the installation bracket is installed in the installation opening.
  • the housing has a first housing wall parallel to the vibration direction of the vibrator, the installation opening is provided on the first housing wall, the heat conducting portion is provided in a plate shape, and blocks the the installation opening;
  • the casing has a first casing wall parallel to the vibration direction of the vibrator, and a second casing wall adjacent to the first casing wall, and the installation opening is provided in the second casing a wall
  • the heat-conducting part includes a first heat-conducting plate part that blocks the installation opening, and a second heat-conducting plate part that is connected to the first heat-conducting plate part and is parallel to the first shell wall, the coil fixed on the second heat-conducting plate portion.
  • the mounting bracket further includes a mounting portion, the heat conducting portion is connected to the mounting portion, and the mounting portion is fixedly connected to the mounting opening.
  • the mounting portion is provided with a connecting opening, and the heat conducting portion is connected with the connecting opening.
  • the housing has a first housing wall parallel to the vibration direction of the vibrator, the mounting opening is provided on the first housing wall, the mounting portion is provided in a plate shape, and blocks the installation opening, the heat conduction part is connected to the inner plate surface of the installation part;
  • the casing has a first casing wall parallel to the vibration direction of the vibrator, and a second casing wall adjacent to the first casing wall, and the installation opening is provided in the second casing a wall
  • the mounting portion includes a first mounting plate portion that blocks the mounting opening, and a second mounting plate portion that is connected to the first mounting plate portion and is parallel to the first shell wall, the heat conducting The part is provided on the second mounting plate part.
  • the utility model also provides an electronic terminal, which includes the aforementioned linear motor.
  • the coil of the utility model will be accompanied by heat during operation. If no heat dissipation measures are taken, the coil will continue to work in a heat-generating state, so the internal temperature of the coil will continue to rise, and the excessively high temperature will cause the coil to be blown.
  • a heat-conducting part is arranged in the mounting bracket, and at least part of the coil is connected to the heat-conducting part. In this way, when the linear motor works, the heat generated by the coil can be exported through the heat-conducting part, thereby improving the heat dissipation performance of the coil and avoiding heat Build up on the coil, thereby reducing the probability of the coil blowing out under prolonged continuous operation.
  • FIG. 1 is a schematic diagram of an explosion structure of an embodiment of a linear motor of the present invention
  • Fig. 2 is a sectional view of the linear motor in one direction in Fig. 1;
  • FIG. 3 is a schematic diagram of an explosion structure of another embodiment of the linear motor of the present invention.
  • FIG. 4 is a cross-sectional view of the linear motor in one direction in FIG. 3;
  • FIG. 5 is a cross-sectional view of the linear motor in another direction in FIG. 3;
  • FIG. 6 is a schematic diagram of an explosion structure of another embodiment of the linear motor of the present invention.
  • FIG. 7 is a cross-sectional view of the linear motor in one direction in FIG. 6;
  • Fig. 8 is the partial enlarged view of A place in Fig. 7;
  • FIG. 9 is a schematic diagram of an explosion structure of another embodiment of the linear motor of the present invention.
  • FIG. 10 is a cross-sectional view of the linear motor in one direction in FIG. 9;
  • Fig. 11 is a partial enlarged view at B in Fig. 10;
  • FIG. 12 is a cross-sectional view of the linear motor shown in FIG. 9 in another direction.
  • label name label name 10 case 101 first shell wall 102 second shell wall 11 mounting opening 20 vibrator twenty one magnet 21a first magnet 21b second magnet twenty two mass twenty three Magnetic plate 30 Mounting brackets 31 Thermal Department 31a The first heat conduction plate part 31b The second heat conduction plate part 32 Installation Department 32a first mounting plate 32b second mounting plate 32c connection interface 40 stator 41 coil 50 elastic connector 310 splicing flange
  • the utility model provides a linear motor.
  • the linear motor includes:
  • the vibrator 20 includes a magnet 21, and the magnet 21 is connected in the housing 10 through an elastic connector 50;
  • the mounting bracket 30 is mounted on the housing 10 and includes a heat conducting portion 31;
  • the stator 40 includes a coil 41 , and the coil 41 is at least partially connected to the heat-conducting portion 31 .
  • the coil 41 When the linear motor is working, the coil 41 will heat up. If no heat dissipation measures are taken, the coil 41 will continue to work in a heat-generating state, and the internal temperature of the coil 41 will continue to rise, and the excessive temperature will cause the coil 41 to be blown.
  • a heat-conducting portion 31 is provided in the mounting bracket 30 , and at least part of the coil 41 is connected to the heat-conducting portion 31 .
  • the heat generated by the coil 41 can be conducted through the heat-conducting portion 31 , thereby The heat dissipation performance of the coil 41 is improved, and the accumulation of heat on the coil 41 is avoided, thereby reducing the probability of the coil 41 being burnt out under continuous operation for a long time.
  • the heat-conducting portion 31 is configured as a heat-conducting conductor; that is, the heat-conducting portion 31 not only has thermal conductivity to improve the heat dissipation performance of the coil 41 , but also has electrical conductivity to achieve a certain degree of conductivity. Therefore, after the coil 41 stops energizing, the vibrator 20 can quickly stop vibrating.
  • the material of the heat-conducting portion 31 is a non-magnetic metal material.
  • the advantages of using a non-magnetic metal material as the heat-conducting part 31 are: first, the metal material has superior heat-conducting performance, which can better play a heat-conducting effect; in addition, the metal material has good electrical conductivity, which can make the heat-conducting part 31 and the vibrating magnet 21 communicate with each other.
  • the electromagnetic damping effect between the coils 41 is more obvious, so that the vibrator 20 stops vibrating more quickly after the coil 41 stops being energized; in addition, the non-magnetic material can avoid interference to the magnetic field at the coil 41 .
  • the material of the heat-conducting portion 31 may also be a non-metallic material, such as but not limited to conductive ceramics, etc.
  • the material of the heat-conducting portion 31 may also be, but not limited to, only a thermally conductive material. performance of ordinary ceramics, etc.
  • the non-magnetic metal material is copper material or a non-magnetic alloy material containing copper.
  • Gold, silver, copper, aluminum and other metals are non-magnetic materials with good thermal conductivity and electrical conductivity at the same time, but considering the cost, copper and aluminum have obvious price advantages compared with gold or silver; In terms of performance, the thermal conductivity and electrical conductivity of aluminum are both lower than those of copper.
  • copper is selected as the heat-conducting portion 31 in this embodiment, which is more cost-effective.
  • the material of the heat conducting portion 31 may also be a non-magnetic alloy material containing copper.
  • the material of the thermally conductive portion 31 may also be a silver material or a silver-containing non-magnetic alloy material.
  • the housing 10 is provided with an installation opening 11 , and the installation bracket 30 is installed in the installation opening 11 .
  • the edge of the installation bracket 30 and the installation opening 11 are connected and fixed by means of glue sealing; in this way, the connection and fixation between the installation bracket 30 and the housing 10 can be realized, and the connection between the installation bracket 30 and the The gap between the installation openings 11 is blocked to prevent small foreign objects from entering the housing 10 .
  • the coil 41 needs to be replaced, use a hot air duct or the like to blow hot air to the sealing position, and after the sealing glue is heated and melted, the mounting bracket 30 is removed from the installation opening 11 . In this way, the installation opening 11 can be passed through the installation opening 11 without disassembling the casing. Replace the coil 41.
  • the mounting bracket 30 can also be connected to the mounting opening 11 by a detachable method such as a screw locking structure or a buckle structure, so that the coil 41 can be directly replaced from the mounting opening 11 after the mounting bracket 30 is removed.
  • a detachable method such as a screw locking structure or a buckle structure
  • the mounting opening 11 is not provided on the housing 10 , and the mounting bracket 30 is directly fixed between the inner surface of the housing 10 and the coil 41 .
  • the heat-conducting portion 31 is fixedly connected to the installation opening 11 , so that the heat-conducting portion 31 is at least partially exposed outside the installation opening 11 , and the heat generated by the coil 41 can directly pass through the heat-conducting portion 31 .
  • the heat-conducting portion 31 is fixedly connected to the installation opening 11 , so that the heat-conducting portion 31 is at least partially exposed outside the installation opening 11 , and the heat generated by the coil 41 can directly pass through the heat-conducting portion 31 .
  • it is not necessary to enter the external environment through the heat conduction of the casing 10 , thereby improving the heat conduction efficiency of the heat conduction part 31 .
  • the housing 10 has a first housing wall 101 parallel to the vibration direction of the vibrator 20 , the installation opening 11 is provided on the first housing wall 101 , and the heat conducting portion 31 is It is arranged in a plate shape and closes the installation opening 11 .
  • the plate-shaped heat-conducting portion 31 has a simple structure, is convenient for production, and is more convenient to fix when connected to the installation opening 11 .
  • steps may be provided on the edge of the plate-shaped heat conduction part 31 to increase the heat transfer area of the heat conduction part 31 .
  • the mounting opening 11 is also correspondingly set as a stepped structure.
  • the matching stepped structure can also increase the adhesive area and make the connection between the two more stable.
  • a bevel fitting structure may also be formed between the heat conducting portion 31 and the installation opening 11 .
  • the casing 10 has a first casing wall 101 parallel to the vibration direction of the vibrator 20 , and a second casing wall adjacent to the first casing wall 101 .
  • the installation opening 11 is provided in the second shell wall 102
  • the heat conduction part 31 includes a first heat conduction plate part 31a which blocks the installation opening 11, and a second heat conduction plate part 31a connected to the first heat conduction plate part and parallel to the first shell wall 101.
  • the heat transfer plate portion 31b and the coil 41 are fixed to the second heat transfer plate portion 32b.
  • the heat-conducting portion 31 thus arranged can provide a larger heat-conducting area and further improve the heat-conducting efficiency.
  • the mounting bracket 30 includes a first heat-conducting plate portion 31a and a second heat-conducting plate portion 31b which are connected to each other. This structure is more stable, has higher strength, and is not easily deformed.
  • the second heat-conducting plate portion 31a is usually laminated inside the first casing wall 101 to reduce the probability of deformation of the first casing wall 101 .
  • the height of the stator 40 relative to the second heat-conducting plate portion is generally smaller than the height of the first heat-conducting plate portion 31a laterally protruding from the second heat-conducting plate portion 31b, so as to prevent the stator 40 from being unable to pass through the installation opening 11, thereby ensuring that all The stator 40 can be installed in the housing 10 .
  • the heat-conducting portion 31 includes two first heat-conducting plate portions 31a.
  • the two first heat-conducting plate portions 31a are respectively disposed at opposite ends of the second heat-conducting plate portion 31b, and each block an installation opening 11. It can be understood that since the opposite ends of the second heat-conducting plate portion 32 are provided with a first heat-conducting plate portion 31, the structural stability and strength of the heat-conducting portion 31 can be further improved. Easily deformed.
  • the heat conducting portion 31 can also be assembled through any one of the mounting openings 11 , which can improve the assembling convenience between the heat conducting portion 31 and the housing 10 .
  • the mounting bracket 30 further includes a mounting portion 32 , the heat conducting portion 31 is connected to the mounting portion 32 , and the mounting portion 32 is fixedly connected to the mounting opening 11 .
  • a mounting portion 32 is added to play a fixed connection role, while the heat-conducting portion 31 only needs to undertake the heat-conducting function, and its volume can be reduced, thereby further saving costs.
  • the housing 10 has a first housing wall 101 parallel to the vibration direction of the vibrator 20 , the mounting opening 11 is provided on the first housing wall 101 , and the mounting portion 32 is in the shape of a first housing wall 101 . It is provided in a plate shape and closes the mounting opening 11 , and the heat conducting portion 31 is connected to the inner plate surface of the mounting portion 32 .
  • the thickness of the mounting portion 32 should be as small as possible. In the case of using the same material, the smaller the thickness of the mounting portion 32 is, the smaller the thermal resistance is, and the more favorable it is for the thermally conductive portion 31 to interact with the Thermal conduction of the environment outside the linear motor housing 10 .
  • the heat conducting portion 31 and the mounting portion 32 there are various ways of connecting the heat conducting portion 31 and the mounting portion 32 , and only one or two of them are listed here, such as adhesive connection or snap connection.
  • SPCC cold-rolled carbon steel
  • SUS430 stainless steel
  • such materials have high hardness and are fixedly connected to the mounting opening 11. It can improve the structural stability of the linear motor housing.
  • such materials can also play the role of electromagnetic shielding to avoid possible external magnetic fields from affecting the magnetic field inside the linear motor, thereby ensuring that the linear motor can provide stable vibration feedback.
  • the mounting bracket 30 further includes a mounting portion 32 , the heat conducting portion 31 is connected with the mounting portion 32 , and the mounting portion 32 is fixedly connected with the mounting opening 11 ;
  • 10 has a first shell wall 101 parallel to the vibration direction of the vibrator 20, and a second shell wall 102 adjacent to the first shell wall 101, the mounting opening 11 is provided in the second shell wall 102, and the mounting portion 32 includes a blocking mounting The first mounting plate portion 32a of the opening 11, and the second mounting plate portion 32b connected to the first mounting plate portion 32a and parallel to the first housing wall 101; 31 is connected to the connection opening 32c.
  • the volume of the heat-conducting portion 31 is smaller and the cost is correspondingly lower;
  • the mounting bracket 30 has strong structural stability and high strength.
  • the peripheral edge of the heat-conducting portion 31 is provided with an embedded flange 310 , and the thickness of the embedded flange 310 is generally smaller than the thickness of the heat-conducting portion 31 .
  • the positions of the embedment flange and the embedment groove can also be exchanged, that is, the embedment groove is provided on the periphery of the heat conducting portion 31 , and correspondingly, the wall surface of the connection opening 32c is provided with an embedment groove. Provided with an inlaid flange.
  • the mounting portion 32 includes two first mounting plate portions 32 a , which are respectively disposed at opposite ends of the second mounting plate portion 32 b and each block one mounting opening 11 . It can be understood that since the opposite ends of the second mounting plate portion 32 are provided with a first mounting plate portion 32 respectively, the structural stability and strength of the mounting portion 32 can be further improved, in particular, the second mounting plate portion 32b will be more durable Easily deformed. In addition, when the sizes of the two mounting openings 11 are the same, the mounting portion 32 can also be assembled through any one of the mounting openings 11 , which can improve the assembling convenience between the mounting portion 32 and the housing 10 .
  • the coil 41 is a flat coil, and the flat side of the flat coil faces the magnet 21; the magnet 21 includes a first magnet 21a and a second magnet 21b whose magnetization directions are both perpendicular to the flat side, and the first magnet 21a and the second magnet 21b.
  • the magnetization direction of the first magnet 21a is opposite to the magnetization direction of the second magnet 21b.
  • the coil 41 is set as a flat coil 41 located on one side of the magnet 21 . Compared with the cylindrical coil inserted in the magnetic gap, the coil 41 collides with the magnet 21 and is damaged during the assembly process. The probability will be effectively reduced, so that the assembly difficulty of the coil 41 can be effectively reduced, thereby improving the assembly efficiency of the product.
  • the vibrator 20 further includes a magnetic conductive plate 23 disposed on the side of the magnet 21 away from the coil 41 to regulate the magnetic field of the magnet 21, so that after the coil 41 is energized, a force for effectively vibrating the vibrator 20 can be generated.
  • the vibrator 20 further includes a mass block 22 , and the mass block 22 is fixedly connected with the magnet 21 .
  • the mass block 22 is frame-shaped, and the magnet 21 and the magnetic conducting plate 23 are both fixed in the mass block 22; in this way, the mass of the vibrator 20 can be more symmetrically distributed, which is beneficial to the stability of the vibrator 20 vibration.
  • the mass block 22 is in the shape of a rectangular frame.
  • the present design is not limited to this, and in other embodiments, the mass block 22 may also be in the shape of a circular frame, a hexagonal frame, or the like, but not limited to.
  • the elastic connecting member 50 is configured as an elastic piece; the elastic piece has a simple structure, is easy to manufacture, and has a low cost.
  • the elastic connecting member 50 can also be configured as a spring or the like.
  • the present invention also provides an electronic terminal, the electronic terminal includes a linear motor, and the specific structure of the linear motor refers to the above-mentioned embodiments. Since the electronic terminal adopts all the technical solutions of all the above-mentioned embodiments, it has at least the All the beneficial effects brought by the technical solution will not be repeated here.
  • the electronic terminal can be a mobile phone, a tablet computer, a handheld game console, a navigation device, etc.
  • the linear motor assumes the function of system feedback in these products, such as incoming call prompts, information prompts, navigation prompts and other possible prompts.

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

Abstract

本实用新型公开一种线性马达及电子终端，其中，线性马达包括：壳体；振子，包括磁体，所述磁体通过弹性连接件连接在所述壳体内；安装支架，安装于所述壳体，并包括导热部；以及定子，包括线圈，所述线圈至少部分连接于所述导热部。本实用新型的技术方案能提升线性马达的线圈的散热性能。

Description

线性马达及电子终端 技术领域
本实用新型涉及电子设备技术领域，特别涉及一种线性马达及电子终端。
背景技术
随着智能交互领域的不断发展，线性马达的使用越来越广泛，结构新型、性能可靠的线性马达成为更多大型终端企业的优先考虑。线性马达工作时，线圈通电后会伴随着发热，散热不良会对线性马达的工作性能产生很大影响，然而，目前的厂商并不过多关注线性马达的散热。
实用新型内容
本实用新型的主要目的是提出一种线性马达，旨在提升线性马达的线圈的散热性能。
为实现上述目的，本实用新型提出的线性马达包括：
壳体；
振子，包括磁体，所述磁体通过弹性连接件连接在所述壳体内；
安装支架，安装于所述壳体，并包括导热部；以及
定子，包括线圈，所述线圈至少部分连接于所述导热部。
可选地，所述导热部设置为导热导电体。
可选地，所述导热部的材质为非磁性金属材质。
可选地，所述非磁性金属材质为铜材质或者含铜的非磁性合金材质。
可选地，所述壳体设有安装开口，所述安装支架安装于所述安装开口。
可选地，所述壳体具有与所述振子的振动方向相并行的第一壳壁，所述安装开口设于所述第一壳壁，所述导热部呈板状设置，并封堵所述安装开口；
可选地，所述壳体具有与所述振子的振动方向相并行的第一壳壁、及邻接于所述第一壳壁的第二壳壁，所述安装开口设于所述第二壳壁，所述导热部包括封堵所述安装开口的第一导热板部、及连接于所述第一导热板部且与 所述第一壳壁相并行的第二导热板部，所述线圈固设在所述第二导热板部。
可选地，所述安装支架还包括安装部，所述导热部与所述安装部连接，所述安装部与所述安装开口固定连接。
可选地，所述安装部设有连接开口，所述导热部与所述连接开口连接。
可选地，所述壳体具有与所述振子的振动方向相并行的第一壳壁，所述安装开口设于所述第一壳壁，所述安装部呈板状设置，并封堵所述安装开口，所述导热部连接于所述安装部的内板面；
可选地，所述壳体具有与所述振子的振动方向相并行的第一壳壁、及邻接于所述第一壳壁的第二壳壁，所述安装开口设于所述第二壳壁，所述安装部包括封堵所述安装开口的第一安装板部、及连接于所述第一安装板部且与所述第一壳壁相并行的第二安装板部，所述导热部设于所述第二安装板部。
本实用新型还提出一种电子终端，包括前述的线性马达。
本实用新型的线圈工作时会伴随着发热，若不对其采取散热措施，线圈将持续以发热状态工作，那么线圈内部温度将持续升高，而过高的温度会导致线圈被烧断。本实用新型通过在安装支架中设有导热部，并至少将部分线圈连接于导热部，如此，在线性马达工作时，线圈产生的热量可通过导热部导出，从而提高线圈的散热性能，避免热量在线圈上积聚，从而降低线圈在长时间持续工作下烧断的概率。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本实用新型线性马达一实施例的爆炸结构示意图；
图2为图1中线性马达一方向的截面图；
图3为本实用新型线性马达另一实施例的爆炸结构示意图；
图4为图3中线性马达一方向的截面图；
图5为图3中线性马达另一方向的截面图；
图6为本实用新型线性马达又一实施例的爆炸结构示意图；
图7为图6中线性马达一方向的截面图；
图8为图7中A处的局部放大图；
图9为本实用新型线性马达再一实施例的爆炸结构示意图；
图10为图9中线性马达一方向的截面图；
图11为图10中B处的局部放大图；
图12为图9中线性马达另一方向的截面图。
附图标号说明：
标号 名称 标号 名称
10 壳体 101 第一壳壁
102 第二壳壁 11 安装开口
20 振子 21 磁体
21a 第一磁体 21b 第二磁体
22 质量块 23 导磁板
30 安装支架 31 导热部
31a 第一导热板部 31b 第二导热板部
32 安装部 32a 第一安装板部
32b 第二安装板部 32c 连接接口
40 定子 41 线圈
50 弹性连接件 310 嵌接凸缘
本实用新型目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普 通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
需要说明，若本实用新型实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本实用新型实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，若全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B”为例，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本实用新型要求的保护范围之内。
本实用新型提出一种线性马达。
在本实用新型的一实施例中，参照图1、图2，该线性马达，包括：
壳体10；
振子20，包括磁体21，磁体21通过弹性连接件50连接在壳体10内；
安装支架30，安装于壳体10，并包括导热部31；以及
定子40，包括线圈41，线圈41至少部分连接于导热部31。
本实用新型中，线圈41通入驱动电流后，磁体21与线圈41之间产生相互作用力，使得振子2产生相对定子40的振动，从而为具有该线性马达的电子终端提供振动的系统反馈。
在线性马达工作时，线圈41会发热，若不对其采取散热措施，线圈41将持续以发热状态工作，那么线圈41内部温度将持续升高，而过高的温度会导致线圈41被烧断。
在本实施例中，在安装支架30中设有导热部31，并至少将部分线圈41连接于导热部31，如此，在线性马达工作时，线圈41产生的热量可通过导热 部31导出，从而提高线圈41的散热性能，避免热量在线圈41上积聚，从而降低线圈41在长时间持续工作下烧断的概率。
进一步地，在本实施例中，导热部31设置为导热导电体；也即，导热部31不仅具备导热性，以提高线圈41的散热性能，导热部31还具备导电性，以起到一定程度的电磁阻尼效果，从而在线圈41停止通电后，能使得振子20快速停止振动。
可选地，导热部31的材质为非磁性金属材质。应用非磁性金属材质作为导热部31的优势在于：首先，金属材料的导热性能优越，能更好地发挥导热作用；另外，金属材料的导电性能好，能使得导热部31与振动的磁体21之间的电磁阻尼效果较为明显，从而在线圈41停止通电后，使振子20较快速地停止振动；再者，非磁性材料可避免对线圈41处的磁场产生干扰。当然，在其他实施例中，导热部31的材质也可以是非金属材质，例如但不限于导电陶瓷等；另外，若不考虑电磁阻尼效果，导热部31的材质也可但不限于采用仅具有导热性能的普通陶瓷等。
进一步地，在本实施例中，非磁性金属材质为铜材质或者含铜的非磁性合金材质。金、银、铜、铝等金属均是同时具备良好导热性能和导电性能的非磁性材质，但考虑到成本，相比金或银，铜、铝的价格优势明显；又考虑到导热性能和导电性能，铝的导热系数和导电系数均小于铜，综合来说，本实施例中选用铜作为导热部31，性价比更高。为进一步节约成本，导热部31的材质也可是含铜的非磁性合金材质。当然，在其他实施例中，在不考虑成本，只考虑导热性能和导电性能时，导热部31的材质也可以是银材质或者含银的非磁性合金材质。
进一步地，在本实施例中，壳体10设有安装开口11，安装支架30安装于安装开口11。可选地，安装支架30的边缘与所述安装开口11之间通过胶封的方式连接固定；如此，能在实现安装支架30与壳体10连接固定的同时，实现对安装支架30与所述安装开口11之间间隙的封堵，避免细小异物进入壳体10内。当需要更换线圈41时，利用热风筒等向胶封位置吹送热风，将封胶加热熔融之后，将安装支架30从安装开口11拆下，如此，无需拆开壳体，即可通过安装开口11更换线圈41。除了胶封的方式，安装支架30也可通过螺钉锁附结构或卡扣结构等可拆卸方式与安装开口11进行连接，以便将 安装支架30拆除后即可从安装开口11处直接更换线圈41。当然，在其他实施例中，也可以是，壳体10上不设安装开口11，安装支架30直接固设于壳体10内表面与线圈41之间。
进一步地，在本实施例中，如图2所示，导热部31与安装开口11固定连接，以使导热部31至少部分显露于安装开口11外，线圈41产生的热量可直接通过导热部31传至壳体10外部环境，不必另外再通过壳体10的热传导进入外部环境，从而提升导热部31的导热效率。
进一步地，在本实施例中，参照图1和图2，壳体10具有与振子20的振动方向相并行的第一壳壁101，安装开口11设于第一壳壁101，导热部31呈板状设置，并封堵安装开口11。板状的导热部31结构简单，便于生产，在与安装开口11连接时，也更方便固定。如图2所示，为增强导热部31的导热效果，可在板状导热部31的边缘设置台阶，以增大导热部31的传热面积。安装开口11也与之对应设置为台阶结构，在使用胶粘方式将导热部31固定连接与于安装开口11时，相配合的台阶结构也能增大胶粘面积，使二者的连接更稳固。当然，在其他实施例中，导热部31与安装开口11之间也可以是斜面配合结构。
在本实用新型的另一实施例中，参照图3至图5，壳体10具有与振子20的振动方向相并行的第一壳壁101、及邻接于第一壳壁101的第二壳壁102，安装开口11设于第二壳壁102，导热部31包括封堵安装开口11的第一导热板部31a、及连接于第一导热板部且与第一壳壁101相并行的第二导热板部31b，线圈41固设在第二导热板部32b。如此设置的导热部31可提供更大的导热面积，进一步提升导热效率。安装支架30包括相交接的第一导热板部31a和第二导热板部31b，此结构更为稳定、且强度更高，不易变形。另外，第二导热板部31a通常层叠在第一壳壁101内侧，以降低第一壳壁101变形的概率。当然，定子40的相对第二导热板部的高度通常小于第一导热板部31a侧向突出于第二导热板部31b的高度，以避免定子40无法穿过所述安装开口11，从而保证所述定子40能装入所述壳体10内。
进一步地，在本实施例中，如图3和图5所示，第二壳壁102相对地设有两个，且每一第二壳壁102设有一安装开口11。相应地，导热部31包括两 第一导热板部31a，两第一导热板部31a分设于第二导热板部31b的相对两端，各封堵一个安装开口11。可以理解，由于第二导热板部32的相对两端各设有一个第一导热板部31，能进一步提高导热部31的结构稳定性和强度，特别地，第二导热板部31b将更加不易于变形。另外，在两个安装开口11大小一致时，导热部31还可通过任意一个安装开口11进行装配，能提高导热部31与壳体10之间的装配方便性。
在本实用新型的又一实施例中，如图7和图8所示，安装支架30还包括安装部32，导热部31与安装部32连接，安装部32与安装开口11固定连接。本实施例增设安装部32以发挥固定连接作用，而导热部31只需承担导热功能，其体积能有所下降，从而进一步节约成本。
进一步地，在本实施例中，参照图6、图7，壳体10具有与振子20的振动方向相并行的第一壳壁101，安装开口11设于第一壳壁101，安装部32呈板状设置，并封堵安装开口11，导热部31连接于安装部32的内板面。在满足硬度和强度的前提下，安装部32的厚度应尽可能小，在使用相同的材料的情况下，安装部32的厚度越小，热阻也越小，也越有利于导热部31与线性马达壳体10外部环境的导热。导热部31与安装部32的连接方式有多种，在此仅列举其中一二，如胶粘连接或卡扣连接等。本实施例中，对于封堵安装开口11的安装部32，其可选用SPCC(冷轧碳钢)或SUS430(不锈钢)等，一方面，这类材料的硬度大，与安装开口11固定连接，能提升线性马达外壳的结构稳定性，另一方面，这类材料还可起到电磁屏蔽的作用，以避免可能的外部磁场影响线性马达内部的磁场，从而保证线性马达能提供稳定的振动反馈。
在本实用新型的再一实施例中，如图9至图12所示，安装支架30还包括安装部32，导热部31与安装部32连接，安装部32与安装开口11固定连接；壳体10具有与振子20的振动方向相并行的第一壳壁101、及邻接于第一壳壁101的第二壳壁102，安装开口11设于第二壳壁102，安装部32包括封堵安装开口11的第一安装板部32a、及连接于第一安装板部32a且与第一壳壁101相并行的第二安装板部32b；第二安装板部32b设有连接开口32c，导 热部31与连接开口32c连接。与上述一实施例与另一实施例相比，导热部31的体积更小，成本也相应更低；与上述又一实施例相比，本实施例中，安装部32与导热部31组成的安装支架30结构稳定性强、强度高。另外，参照图11，可选地，导热部31的周缘设有嵌接凸缘310，该嵌接凸缘310的厚度通常小于导热部31的厚度，相应地，连接开口32c的口壁面上设有供所述嵌接凸缘310适配嵌设的嵌接凹槽，以提高导热部31与安装部32之间连接的稳定性和可靠性。当然，于其他实施例中，也可将嵌接凸缘和嵌接凹槽的设置位置交换，也即，在导热部31的周缘设置嵌接凹槽，相应地，在连接开口32c的口壁面上设置嵌接凸缘。
进一步地，在本实施例中，如图9和图12所示，第二壳壁102相对地设有两个，且每一第二壳壁102设有一安装开口11。相应地，安装部32包括两第一安装板部32a，两第一安装板部32a分设于第二安装板部32b的相对两端，各封堵一个安装开口11。可以理解，由于第二安装板部32的相对两端各设有一个第一安装板部32，能进一步提高安装部32的结构稳定性和强度，特别地，第二安装板部32b将更加不易于变形。另外，在两个安装开口11大小一致时，安装部32还可通过任意一个所述安装开口11进行装配，能提高安装部32与壳体10之间的装配方便性。
可选地，在本实施例中，线圈41为扁平线圈，且扁平线圈的扁平侧面朝向磁体21；磁体21包括充磁方向均垂直于扁平侧面的第一磁体21a和第二磁体21b，且第一磁体21a的充磁方向与第二磁体21b的充磁方向相反。本实施例的技术方案通过将线圈41设置为位于磁体21一侧的扁平线圈41，相较于插设于磁间隙中的筒状线圈，线圈41在装配过程中与磁体21产生碰撞而损伤的概率将有效降低，从而能有效降低线圈41的装配难度，进而提高产品的装配效率。通常地，振子20还包括设于磁体21的远离线圈41的一侧的导磁板23，以规整磁体21的磁场，从而在线圈41通电后，能产生使振子20有效振动的作用力。
可选地，振子20还包括质量块22，该质量块22与磁体21固定连接。可以理解，质量块22的增设，有利于提高线性马达所能产生的振动效果。当然，在其他一些实施例中，若磁体21本身的质量已经能产生有效的振动时，则可以不增设质量块22。进一步可选地，质量块22呈框状，磁体21和导磁板23 均固定在质量块22内；如此，能使得振子20的质量在总体分布上更为对称，从而有利于振子20的平稳振动。本实施例中，质量块22呈矩形框状。然本设计不限于此，于其他实施例中，质量块22还可但不限于呈圆形框状、六边形框状等。
本实施例中，可选地，弹性连接件50设有两个，该两个弹性连接件50分设于振子20的相对两侧，以在保证振子20有足够的往复振动弹性的同时，有利于振子20的振动平稳。进一步可选地，弹性连接件50设置为弹片；弹片结构简单，便于制备，且成本较低。然本设计不限于此，于其他实施例中，弹性连接件50还可设置为弹簧等。
本实用新型还提出一种电子终端，该电子终端包括线性马达，该线性马达的具体结构参照上述实施例，由于该电子终端采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
本实用新型中，电子终端可以是手机、平板电脑、掌上游戏机、导航装置等，线性马达在这些产品中承担系统反馈的功能，比如来电提示、信息提示、导航提示及其他可能的提示等。
以上仅为本实用新型的可选实施例，并非因此限制本实用新型的专利范围，凡是在本实用新型的发明构思下，利用本实用新型说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本实用新型的专利保护范围内。

Claims (10)

  1. 一种线性马达，其特征在于，包括：
    壳体；
    振子，包括磁体，所述磁体通过弹性连接件连接在所述壳体内；
    安装支架，安装于所述壳体，并包括导热部；以及
    定子，包括线圈，所述线圈至少部分连接于所述导热部。
  2. 如权利要求1所述的线性马达，其特征在于，所述导热部设置为导热导电体。
  3. 如权利要求2所述的线性马达，其特征在于，所述导热部的材质为非磁性金属材质。
  4. 如权利要求3所述的线性马达，其特征在于，所述非磁性金属材质为铜材质或者含铜的非磁性合金材质。
  5. 如权利要求1至4任一项所述的线性马达，其特征在于，所述壳体设有安装开口，所述安装支架安装于所述安装开口。
  6. 如权利要求5所述的线性马达，其特征在于，所述壳体具有与所述振子的振动方向相并行的第一壳壁，所述安装开口设于所述第一壳壁，所述导热部呈板状设置，并封堵所述安装开口；或者，
    所述壳体具有与所述振子的振动方向相并行的第一壳壁、及邻接于所述第一壳壁的第二壳壁，所述安装开口设于所述第二壳壁，所述导热部包括封堵所述安装开口的第一导热板部、及连接于所述第一导热板部且与所述第一壳壁相并行的第二导热板部，所述线圈固设在所述第二导热板部。
  7. 如权利要求5所述的线性马达，其特征在于，所述安装支架还包括安装部，所述导热部与所述安装部连接，所述安装部与所述安装开口固定连接。
  8. 如权利要求7所述的线性马达，其特征在于，所述安装部设有连接开口，所述导热部与所述连接开口连接。
  9. 如权利要求7所述的线性马达，其特征在于，所述壳体具有与所述振子的振动方向相并行的第一壳壁，所述安装开口设于所述第一壳壁，所述安装部呈板状设置，并封堵所述安装开口，所述导热部连接于所述安装部的内板面；或者，
    所述壳体具有与所述振子的振动方向相并行的第一壳壁、及邻接于所述第一壳壁的第二壳壁，所述安装开口设于所述第二壳壁，所述安装部包括封堵所述安装开口的第一安装板部、及连接于所述第一安装板部且与所述第一壳壁相并行的第二安装板部，所述导热部设于所述第二安装板部。
  10. 一种电子终端，其特征在于，包括权利要求1-9任一项所述的线性马达。
PCT/CN2021/101764 2020-08-31 2021-06-23 线性马达及电子终端 Ceased WO2022041983A1 (zh)

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