CN206963061U - Centring disk and the loudspeaker with the centring disk - Google Patents
Centring disk and the loudspeaker with the centring disk Download PDFInfo
- Publication number
- CN206963061U CN206963061U CN201720877164.1U CN201720877164U CN206963061U CN 206963061 U CN206963061 U CN 206963061U CN 201720877164 U CN201720877164 U CN 201720877164U CN 206963061 U CN206963061 U CN 206963061U
- Authority
- CN
- China
- Prior art keywords
- fixed part
- centring disk
- voice coil
- conductive layer
- linking arm
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model, which discloses a kind of centring disk and the loudspeaker with the centring disk, the centring disk, to be included：Including the linking arm positioned at outermost first fixed part, the second fixed part positioned at medium position and connection first fixed part and second fixed part, the centring disk includes insulated base material layer and the conductive layer for electrically conducting；The conductive layer for the opening position being connected positioned at the linking arm with first fixed part sets jagged close to the side of the first fixed part.When linking arm produces elastic deformation, stress concentration is produced on the inside of the junction of linking arm and the first fixed part, because the conductive layer at this is provided with breach, in the insulated base material layer of stress concentration in this place, avoid stress concentration on the electrically conductive, so as to avoid conductive layer herein from being cracked under stress, the reliability of centring disk is improved, is increased the service life.
Description
Technical field
It the utility model is related to loudspeaker field.More particularly, to a kind of centring disk and with the centring disk
Loudspeaker.
Background technology
With the expansion in consumer electronics market, the consumer electronics product such as a large amount of mobile phones, notebook computer obtains extensively
Using as acoustic element important in consumer electronics product, loudspeaker has extensive demand.As people are to consumer
The raising of electronic product requirement, the performance of loudspeaker also have been to be concerned by more and more people.
In the prior art, loudspeaker includes：Accessory system, magnetic circuit system and vibrational system, magnetic circuit system are provided between magnetic
Gap, vibrational system include vibrating diaphragm, the centring disk and voice coil loudspeaker voice coil that are combined together with vibrating diaphragm, and voice coil loudspeaker voice coil is arranged in magnetic gap, is set
After the ac signal of external change is received in the voice coil loudspeaker voice coil in magnetic gap, reciprocating cutting magnetic force is done under the driving of magnetic field force
The motion of line, drive diaphragm oscillations sounding.
Centring disk is one of basic building block of loudspeaker, and its effect is mainly to ensure that voice coil loudspeaker voice coil is correct in magnetic gap
Position, keep voice coil loudspeaker voice coil in stress, vibrational system only move axially in reciprocal fashion and provide vibrational system it is reciprocating when bullet
Power, the resonant frequency of loudspeaker is determined jointly with the vibrating diaphragm voice coil loudspeaker voice coil of vibrational system.It is solid that the centring disk of traditional structure includes first
Determine portion and the second fixed part, the first fixed part is fixedly connected with accessory system, and the second fixed part is connected with voice coil loudspeaker voice coil, and it is fixed that voice coil loudspeaker voice coil passes through
The conductive layer of heart branch piece electrically connects with external circuit, and the first fixed part and the second fixed part are integrally connected setting by linking arm.
Inventor has found that after loudspeaker carries out fatigue test or long-term use the conductive layer on linking arm is also easy to produce crackle, and then makes
Conductive fault rupture on linking arm, so as to influence the reliability of loudspeaker.
Accordingly, it is desirable to provide a kind of improve, the defects of to overcome traditional structure loudspeaker.
Utility model content
The conductive layer that first technical problem to be solved in the utility model is to provide at a kind of linking arm is not easy to break
Centring disk.
Second technical problem to be solved in the utility model is to provide a kind of loudspeaker of high reliability.
To solve above-mentioned first technical problem, the utility model uses following technical proposals：
A kind of centring disk, including positioned at outermost first fixed part, the second fixed part positioned at medium position and
The linking arm of first fixed part and second fixed part is connected, the centring disk includes insulated base material layer and is used for
The conductive layer to electrically conduct；The conductive layer for the opening position being connected positioned at the linking arm with the fixed part is fixed close to first
The side in portion sets jagged.
Preferably, the breach is shaped as arc or semicircle.
Preferably, the linking arm includes the first extension extended from first fixed part, first extension
Portion is in circular arc, and the side of close first fixed part of the conductive layer on first extension offers described lack
Mouthful.
Preferably, the linking arm also includes the second extension extended from second fixed part, and described second prolongs
Extending portion is in circular arc, and the side of close second fixed part of the conductive layer on second extension offers scarce
Mouthful.
Preferably, the breach is provided with least one.
Preferably, the linking arm is provided with two；Or the linking arm is provided with four, and uniformly it is distributed
In gap between first fixed part and second fixed part；It is respectively provided with described two/tetra- linking arms
State breach.
Preferably, the material of the insulated base material layer is polyimide film, and the conductive layer is copper foil.
To solve above-mentioned second technical problem, the utility model uses following technical proposals：
A kind of loudspeaker, including accessory system, magnetic circuit system and vibrational system, the magnetic circuit system and the vibration system
System, which houses, to be fixed in the accommodating chamber that the accessory system is formed, and the vibrational system includes vibrating diaphragm, the centering being combined together
Branch piece and voice coil loudspeaker voice coil, the centring disk are any of the above-described kind of centring disk.
Preferably, first fixed part is connected with the accessory system, second fixed part and the voice coil loudspeaker voice coil phase
Connection；The conductive layer on first fixed part electrically connects with external circuit, on second fixed part
The conductive layer is electrically connected with voice coil loudspeaker voice coil, and the voice coil loudspeaker voice coil is electrically connected by the conductive layer with external circuit,
Preferably, first fixed part is provided with the first pad electrically connected with external circuit, and second fixed part is set
There is the second pad electrically connected with the lead of voice coil loudspeaker voice coil, first pad is electrically connected with the second pad by the conductive layer.
The beneficial effects of the utility model are as follows：
The utility model centring disk is fixed positioned at close the first of linking arm and the first fixed part junction conductive layer
The side in portion open up it is jagged, when voice coil loudspeaker voice coil drive the second fixed part vibration when, linking arm produce elastic deformation, and linking arm with
Stress concentration is produced on the inside of the junction of first fixed part, because the conductive layer at this is provided with breach, stress concentration in this place exhausted
On edge substrate layer, stress concentration is avoided on the electrically conductive, so as to avoid conductive layer herein from being cracked under stress,
The reliability of centring disk is improved, is increased the service life.During linking arm elastic deformation, linking arm and the first fixed part junction
Deformation degree be more than deformation degree with the second fixed part junction, therefore, only in the conduction with the first fixed part junction
Breach is opened up on layer, the service life with regard to centring disk can be greatly improved.
The further conductive layer on the inside of the circular arc type of the extension of linking arm first and the second extension of the utility model
On open up breach, the junction conductive layer of linking arm and the first fixed part, the second fixed part is all provided with jagged, avoids stress excessive
Concentrate at above-mentioned two on the conductive layer of position, suppress conductive layer and crack, further increase the reliability of centring disk,
Extend its service life.
The notch geometry that the utility model conductive layer opens up is semicircle or arc, is easy to the processing of centring disk.
Brief description of the drawings
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 shows the structural representation of the utility model centring disk.
Fig. 2 shows the partial enlarged drawing of the utility model centring disk.
Fig. 3 shows the exploded view of the utility model loudspeaker.
Embodiment
In order to illustrate more clearly of the utility model, the utility model is done into one with reference to preferred embodiments and drawings
The explanation of step.Similar part is indicated with identical reference in accompanying drawing.It will be appreciated by those skilled in the art that below
Specifically described content is illustrative and be not restrictive, and should not limit the scope of protection of the utility model with this.
As shown in figure 1, a specific embodiment of the utility model centring disk, the centring disk 1 of the present embodiment is double
The rectangle structure of layer, is made up of insulated base material layer and conductive layer, and in a kind of specific embodiment, insulated base material layer can be with
It can be copper foil for polyimide film, conductive layer, copper foil is attached on to the polyimide film for scribbling adhesive using rolling process
On, or without using adhesive copper foil is directly generated on polyimide film.It should be noted that the insulation base of centring disk 1
Material layer is not limited to above-mentioned polyimide film, can also select other polymer material films in addition to polyimide, and leads
Electric layer is also not necessarily limited to above-mentioned copper foil, can also be other metal levels or graphene conductive layer etc., and specific material is unrestricted
System.In this application, for convenience of description, to be situated between exemplified by the centring disk of above-mentioned polyimide film and copper foil conductive layer
Continue.
The centring disk of the present embodiment includes the first fixed part 11 and the second fixed part 12, and the first solid portion 11 and second is fixed
Portion 12 is set by the integrally connected of linking arm 13.First fixed part 11 is fixed with accessory system, and the second fixed part 12 is consolidated with voice coil loudspeaker voice coil
It is fixed.First fixed part 11 is provided with the first pad 14, and the second fixed part 12 is provided with the second pad 15, the first pad 14 and second
Pad 15 is electrically connected by conductive layer copper foil, and the first pad 14 electrically connects with external circuit, and the second pad 15 electrically connects with voice coil loudspeaker voice coil.
The shape of the second fixed part 12 is corresponding with the form fit of voice coil loudspeaker voice coil in the present embodiment, is rectangle and four corners set for circular arc
Meter.Linking arm 13 include be circular arc type the first extension 16 and the second extension 17, the first extension 16 from first fix
The side wall centre position in portion 11 extends to be formed, and the second extension 17 extends to be formed from the circular arc corner of the second fixed part 12.
As offered semicircular breach on the inside of the circular arc of conductive layer on the first extensions of Fig. 2 16, when voice coil loudspeaker voice coil drives second
When fixed part 12 vibrates, the first extension 16 of circular arc produces elastic deformation, and is produced on the inside of the circular arc of the first extension 16
Raw stress concentration, breach is avoided because the conductive layer at this is provided with, in the insulated base material layer of stress concentration in this place, avoids stress
Concentrate on the electrically conductive, so as to avoid conductive layer herein from being cracked under stress, improve the reliable of centring disk
Property.Notch geometry in the present embodiment is preferably semicircle, notch geometry can be designed into arc as needed in actual production
Shape.
The utility model further offers semicircular breach on the second extension 17 on the inside of the circular arc of conductive layer,
Based on it is above-mentioned identical the reasons why, avoid the conductive layer positioned at the second extension from cracking, further increase the utility model
The reliability of centring disk.
As shown in figure 1, the centring disk of the present embodiment, the second fixed part 12 is rectangle ring structure, and linking arm 13 is along rectangle
Four axle sides extension of the second fixed part of structure 12, in actual applications, linking arm 13 can carry to be needed according to actual product, along the
Two major axis of two fixed parts 12 while or extend during two short axles.Can be with when linking arm 13 is two, on two linking arms 13
It is respectively provided with above-mentioned breach；When linking arm 13 be four when, four linking arms 13 along the second fixed part 12 axle side extension and
, now, can also be equal on four linking arms 13 in the even gap being distributed between the first fixed part 11 and the second fixed part 12
It is provided with above-mentioned breach.The centring disk of the structure can ensure that diaphragm oscillations balance, and be not likely to produce polarization, be advantageous to centering branch
Piece 1 improves vibration regulation of the centring disk 1 to speaker unit vibrational system, is advantageous to raising and raises to the certralizing ability of vibrating diaphragm
The acoustical behavior of sound device device.
As shown in figure 3, the utility model further provides for a kind of loudspeaker using above-mentioned centring disk 1, the present embodiment
Loudspeaker be rectangle structure, including accessory system, accessory system include protecgulum 31 and shell 32；The protecgulum 31 of accessory system
Formed to house with shell 32 and be fixed with magnetic circuit system and the cavity of vibrational system, magnetic circuit system includes centring magnet 51 and side magnet
61, and fixed center magnet 51 and side magnet 61 and the conductive magnetic yoke 7 for playing magnetic conduction effect, centring magnet 51 is close to protecgulum 11
Center magnetic conductive board 52 is simultaneously provided with, the washer 62 when magnet 61 is provided with close to the one side of protecgulum 11, centring magnet 51, center
Washer 52 with while magnet 61, while washer 62 formed magnetic gap；Vibrational system includes the composite bed 22 that vibrating diaphragm 21 is fixed on vibrating diaphragm 21,
The centring disk 1 and voice coil loudspeaker voice coil 4 fixed with vibrating diaphragm 21, one end of voice coil loudspeaker voice coil 4 is suspended in above-mentioned magnetic gap.
Centring disk 1 is the double-decker that is made up of insulated base material layer and conductive layer, and insulated base material layer is in the present embodiment
Polyimide film, conductive layer are copper foil.Centring disk 1 includes the first fixed part 11 fixed with accessory system and vibrating diaphragm 21 is solid
The second fixed fixed part 12, and the linking arm 13 of the first fixed part 11 of connection and the second fixed part 12, the first of centring disk 1
Fixed part 11 is provided with the first pad 14, and the second fixed part 12 is provided with the second pad 15, the first pad 14 and external circuit electricity
Connection, the second pad 15 are electrically connected with voice coil loudspeaker voice coil 4, and the first pad 14 is electrically connected with the second pad 15 by conductive layer.In order to reduce
To the occupancy of speaker unit inner space, the second pad 15 is arranged on the second fixed part 12 solid away from first second pad 15
Determine the inner side in portion, two the second pads 15 are correspondingly arranged at two straight lines of the second fixed part 12.When the second fixed part 12 is
During rectangle, the second pad 15 is arranged at two major axis sides, can reduce the difficulty of processing of centring disk.It is of the present utility model to raise
Sound device, external circuit electronic signal are entered in voice coil loudspeaker voice coil 4 by the conductive layer on centring disk 1, the voice coil loudspeaker voice coil 4 being arranged in magnetic gap
Internal current change produces magnetic field force, and the vibration of voice coil loudspeaker voice coil 4 drives the vibration sounding of vibrating diaphragm 21.Linking arm 13 includes being the of circular arc type
One extension 16 and the second extension 17, the first extension 16 extend to be formed from the side wall centre position of the first fixed part 11,
Second extension 17 extends to be formed from the circular arc corner of the second fixed part 12.The extension of circular-arc-shaped design, increase effectively
The entire length of linking arm 13 so that vibrational system obtains bigger pliable, improves the low frequency characteristic of loudspeaker.Meanwhile
Increase the length of linking arm 13, producing wiping with linking arm 13 when avoiding speaker operation, during diaphragm oscillations touches and produce miscellaneous
Sound, improves the acoustical behavior of loudspeaker, and ensures that vibrating diaphragm does not touch with the wiping of linking arm 13 when power of loudspeaker is larger, is advantageous to raise
The high powe design of sound device, connection 13 will not be wiped with vibrating diaphragm and touched, avoid destruction of the linking arm 13 to vibrating diaphragm, extend loudspeaker
The service life of device.
Semicircular lack is offered on first extension 16 of the utility model centring disk 1 on the inside of the circular arc of conductive layer
Mouthful, because the first fixed part 11 is fixedly connected with accessory system, the second fixed part 12 is fixedly connected with voice coil loudspeaker voice coil 4, when the drive of voice coil loudspeaker voice coil 4 the
When two fixed parts 12 vibrate, the first extension 16 of circular arc produces elastic deformation, and on the inside of the circular arc of the first extension 16
Stress concentration is produced, avoids breach because the conductive layer at this is provided with, in the insulated base material layer of stress concentration in this place, avoiding should
Power is concentrated on the electrically conductive, and so as to avoid conductive layer herein from being cracked under stress, improve centring disk can
By property.The utility model further offers semicircular breach on the second extension 17 on the inside of the circular arc of conductive layer, keeps away
Exempt to crack positioned at the conductive layer of the second extension, further increase the reliability of the utility model centring disk, extend
The service life of loudspeaker.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model, for those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms, all embodiments can not be exhaustive here,
It is every to belong to obvious changes or variations that the technical solution of the utility model is extended out still in of the present utility model
The row of protection domain.
Claims (10)
1. a kind of centring disk, including positioned at outermost first fixed part, positioned at the second fixed part of medium position and company
Connect the linking arm of first fixed part and second fixed part, it is characterised in that：The centring disk includes insulating substrate
Layer and the conductive layer for electrically conducting；The conduction for the opening position being connected positioned at the linking arm with first fixed part
Layer sets jagged close to the side of first fixed part.
2. centring disk according to claim 1, it is characterised in that the breach is shaped as arc or semicircle.
3. centring disk according to claim 2, it is characterised in that the linking arm includes prolonging from first fixed part
The first extension stretched out, first extension is in circular arc, the close institute of the conductive layer on first extension
The side for stating the first fixed part offers the breach.
4. centring disk according to claim 2, it is characterised in that the linking arm is also included from second fixed part
The second extension extended, second extension are in circular arc, the conductive layer on second extension it is close
The side of second fixed part opens up jagged.
5. the centring disk according to claim 3 or 4, it is characterised in that the breach is provided with least one.
6. centring disk according to claim 5, it is characterised in that the linking arm is provided with two；Or the company
Connect arm and be provided with four, and in the gap being evenly distributed between first fixed part and second fixed part；Institute
State and be provided with the breach on two/tetra- linking arms.
7. centring disk according to claim 1, it is characterised in that the material of the insulated base material layer is polyimides
Film, the conductive layer are copper foil.
A kind of 8. loudspeaker, it is characterised in that including accessory system, magnetic circuit system and vibrational system, the magnetic circuit system and
The vibrational system, which houses, to be fixed in the accommodating chamber that the accessory system is formed, and the vibrational system includes what is be combined together
Vibrating diaphragm, centring disk and voice coil loudspeaker voice coil, the centring disk are the centring disk described in claim any one of 1-7.
9. loudspeaker according to claim 8, it is characterised in that first fixed part is connected with the accessory system
Connect, second fixed part is connected with the voice coil loudspeaker voice coil；The conductive layer and external circuit on first fixed part
Electrical connection, the conductive layer on second fixed part electrically connects with voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil by the conductive layer and
External circuit electrically connects.
10. loudspeaker according to claim 9, it is characterised in that first fixed part is provided with and is electrically connected with external circuit
The first pad connect, second fixed part are provided with the second pad for being electrically connected with the lead of voice coil loudspeaker voice coil, first pad and the
Two pads are electrically connected by the conductive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720877164.1U CN206963061U (en) | 2017-07-19 | 2017-07-19 | Centring disk and the loudspeaker with the centring disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720877164.1U CN206963061U (en) | 2017-07-19 | 2017-07-19 | Centring disk and the loudspeaker with the centring disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206963061U true CN206963061U (en) | 2018-02-02 |
Family
ID=61380991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720877164.1U Active CN206963061U (en) | 2017-07-19 | 2017-07-19 | Centring disk and the loudspeaker with the centring disk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206963061U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109246562A (en) * | 2018-09-21 | 2019-01-18 | 歌尔股份有限公司 | miniature sounding device |
| CN109743662A (en) * | 2018-12-29 | 2019-05-10 | 歌尔股份有限公司 | Centring disk and sounding device |
| CN109862493A (en) * | 2019-01-18 | 2019-06-07 | 东莞顺合丰电业有限公司 | Vibrating elements |
| CN110708644A (en) * | 2019-09-29 | 2020-01-17 | 歌尔科技有限公司 | A conducting film and sound generating mechanism for sound generating mechanism |
| CN111193988A (en) * | 2020-01-03 | 2020-05-22 | 厦门东声电子有限公司 | Novel loudspeaker and assembling method thereof |
| CN111294714A (en) * | 2020-05-11 | 2020-06-16 | 共达电声股份有限公司 | Centering support piece and loudspeaker with same |
| WO2021088937A1 (en) * | 2019-11-08 | 2021-05-14 | 歌尔股份有限公司 | Sound generation device |
| CN114189791A (en) * | 2019-03-14 | 2022-03-15 | 歌尔股份有限公司 | Double-sided sound production device and electronic equipment |
-
2017
- 2017-07-19 CN CN201720877164.1U patent/CN206963061U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109246562A (en) * | 2018-09-21 | 2019-01-18 | 歌尔股份有限公司 | miniature sounding device |
| CN109743662A (en) * | 2018-12-29 | 2019-05-10 | 歌尔股份有限公司 | Centring disk and sounding device |
| CN109862493A (en) * | 2019-01-18 | 2019-06-07 | 东莞顺合丰电业有限公司 | Vibrating elements |
| CN109862493B (en) * | 2019-01-18 | 2023-12-08 | 东莞顺合丰电业有限公司 | Vibrating element |
| CN114189791A (en) * | 2019-03-14 | 2022-03-15 | 歌尔股份有限公司 | Double-sided sound production device and electronic equipment |
| CN114189791B (en) * | 2019-03-14 | 2023-11-17 | 歌尔股份有限公司 | Double-sided sound generating device and electronic equipment |
| CN110708644A (en) * | 2019-09-29 | 2020-01-17 | 歌尔科技有限公司 | A conducting film and sound generating mechanism for sound generating mechanism |
| WO2021088937A1 (en) * | 2019-11-08 | 2021-05-14 | 歌尔股份有限公司 | Sound generation device |
| CN111193988A (en) * | 2020-01-03 | 2020-05-22 | 厦门东声电子有限公司 | Novel loudspeaker and assembling method thereof |
| CN111193988B (en) * | 2020-01-03 | 2021-12-17 | 厦门东声电子有限公司 | Loudspeaker and assembling method thereof |
| CN111294714A (en) * | 2020-05-11 | 2020-06-16 | 共达电声股份有限公司 | Centering support piece and loudspeaker with same |
| CN111294714B (en) * | 2020-05-11 | 2020-08-28 | 共达电声股份有限公司 | Centering support piece and loudspeaker with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206963061U (en) | Centring disk and the loudspeaker with the centring disk | |
| CN207070345U (en) | Centring disk and the loudspeaker with the centring disk | |
| CN206963062U (en) | Centring disk and the loudspeaker with the centring disk | |
| CN206894886U (en) | Minitype acoustic generator | |
| CN207369296U (en) | A kind of loudspeaker | |
| WO2016141727A1 (en) | Loudspeaker device | |
| US20180077495A1 (en) | Silica gel diaphragm, speaker module, and method for reprocessing silica gel diaphragm | |
| WO2021088937A1 (en) | Sound generation device | |
| CN110418258A (en) | Sounding device | |
| CN201789621U (en) | Moving-coil type acoustic generator | |
| CN203301723U (en) | Micro sounding device | |
| CN205510390U (en) | Single loudspeaker | |
| CN203027481U (en) | Piezoelectric speaker | |
| CN204741562U (en) | Speaker unit | |
| CN203708467U (en) | Loudspeaker device | |
| CN204442669U (en) | Speaker unit | |
| CN108055623A (en) | Microphone device | |
| CN111163404A (en) | Bone conduction vibrator loudspeaker | |
| CN201699938U (en) | Novel durable earphones | |
| TWM629898U (en) | Planar speaker structure with vertical planar voice coil and conductive vibration membrane | |
| CN204119502U (en) | Sound-producing device | |
| CN204733377U (en) | Voice coil line and with the voice coil loudspeaker voice coil of this voice coil line coiling and the loud speaker being provided with this voice coil loudspeaker voice coil | |
| WO2021088915A1 (en) | Sound production apparatus and electronic terminal | |
| CN204616080U (en) | Speaker unit | |
| CN211792018U (en) | Bone conduction vibrator loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |