CN110418252A

CN110418252A - A kind of damping short-loop of electromagnetic driver

Info

Publication number: CN110418252A
Application number: CN201810390443.4A
Authority: CN
Inventors: 张百良
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2019-11-05
Anticipated expiration: 2038-04-27
Also published as: CN110418252B

Abstract

A kind of damping short-loop of electromagnetic driver, belong to loudspeaker, ear phone technology field, utilize the high-damping of high damping material additional on short-circuited conducting sleeve, it is mapped on the voice coil of loudspeaker by loosely coupled transformer principle, it realizes the technical effect for not increasing oscillating mass and being obviously improved loudspeaker damping, solves the technical problem of loudspeaker, earphone bring transient response difference due to damping error.

Description

A kind of damping short-loop of electromagnetic driver

Technical field

The technology for belonging to the electromagnetic driver of loudspeaker or earphone is especially a kind of short-circuited conducting sleeve for being compounded with damping material Design.

Background technique

Short-circuited conducting sleeve is the conventional design in loudspeaker design, and classical viewpoint thinks that short-circuited conducting sleeve can improve hysteresis effect, Reduce distortion etc..And have been generally acknowledged that the sectional area of short-circuit ring thickness or ring is the bigger the better, to increase short-circuit effect；And it to lean on Nearly voice coil setting is better.Proposing in the CN103200489B of granted patent of applicant can be using diaphragm type short-circuited conducting sleeve, In Under the premise of not influencing the performances such as the impedance curve of loudspeaker, the transient response of loudspeaker can be improved, improve sound quality；And by Then film, the position that can be very easily set to needs are very square without the structure and production and processing for influencing loudspeaker Just.

Summary of the invention

In order to further improve sound quality, on the basis of CN103200489B scheme, present applicant proposes further improvements Design, the composite damping material on short-circuited conducting sleeve form sandwich structure, the i.e. soft high resistant such as two layers of sponge or silicon rubber The film of damping material, the short-circuited conducting sleeve of centre one film metal good conductor of folder, trilaminate material are glued together.Meeting when voice coil vibrations It generates one to short-circuited conducting sleeve to instigate, so that short-circuited conducting sleeve has a movement tendency, although can securely fix (such as glue using short-circuited conducting sleeve Close etc.) this movement tendency is overcome on rigid element, but the effect of any damping can not be so generated to the movement of voice coil.And Sandwich style damping design as the aforementioned, additional damping on short-circuited conducting sleeve, passes through the loose coupling between short-circuited conducting sleeve and voice coil Transformer induction mechanism, and be mapped on voice coil, equal to attached a good damper to voice coil, voice coil can be damped Improper vibration (referring to the other vibrations not being inconsistent with driving signal).Ideal loudspeaker should strictly be shaken by driving signal Dynamic, without random vibration before vibration, anury shakes after vibration, if as soon as feed-in is a single square-wave signal, the vibration of Utopian loudspeaker It should be a same single square wave；But the vibration of actual loudspeaker is that have many small vibrations after the wavefront and wave of square wave It is dynamic.Here it is the response of the lead and trail edges of loudspeaker or distortion, good loudspeaker design can with the damping of outstanding side and bullet wave come Reduce the distortion to the greatest extent, but difficult: big damping often means that big quality, influences on the efficiency of loudspeaker too big. The technical solution of the application is the transformer induction mechanism formed by short-circuited conducting sleeve and voice coil, and the damping on short-circuited conducting sleeve is mapped to On voice coil, since voice coil circle number is usually in tens to one hundred circle, and short-circuited conducting sleeve is a circle, and according to transformer principle, which is Put several ten times larger amplification mapping, that is to say, that the damping applied on short-circuited conducting sleeve can be amplified tens times of ground and be mapped to voice coil On, play extraordinary damping.And due to be mapping damping, not will increase any oscillating mass to loudspeaker, will not Reduce sensitivity.

Other than the design for electromagnetic drivers such as new loudspeakers and earphone, the design can also be advantageously used in The improvement of loudspeaker and earphone through production and sales, such as commercially available earphone, the hd600 of gloomy sea ear plug, the entrant sound in earphone behind The online circular sandwich style damping short-loop for adding 40*30 millimeters, so that it may be obviously improved transient state, bass is more sturdy Effectively, sense of hearing improves obvious.

Further the design can also simply be generalized to any required excellent damping, and can not or be difficult to directly apply Add in the equipment of damping, such as some pairs are vibrated very sensitive measuring table, workbench.At several positions of platform as propped up Several receiving coils are set on column, and on platform lower pedestal, damping short-loop or damping coil, damping short-loop are set Loosely coupled transformer is constituted with receiving coil, the damping on short-circuited conducting sleeve can be amplified to be mapped to and connect by the principle that transformer boosts On take-up circle, so that the vibration to platform carries out non-contact damping, the vibration resistance of platform can be improved without increasing too many matter Amount.Form a kind of novel contactless short-circuited conducting sleeve damper.

In order to adjust damping, short-circuited conducting sleeve can also be changed to the short-circuited coil of multiturn, i.e., by conducting wire such as enameled wire etc. It is coiled into multiturn coil and the shorted on both ends coil.The multiturn coil of short circuit is replaced with by the single-turn circular coil being shorted.And it hinders Damping material, which is still fitted tightly over, to be shorted on coil, and good damping is provided.

Detailed description of the invention

Attached drawing 1 is the schematic diagram of the damping short-loop of sandwiched type structure, and here is sectional view.1.1 and 1.2 be upper and lower two Layer damping material film, can be used the common high damping material such as sponge, rubber and is made.1.3 be the film of metal good conductor Short-circuited conducting sleeve is made of copper foil.It is glued between trilaminate material to combine, it is also possible to copper foil annulus with die casting in damping material Intermediate or bottom/top is made.1.1 and 1.2 can be the identical damping material of same thickness, be also possible to different materials and/ Or different-thickness.Short-circuited conducting sleeve can also be designed using the common structure and form of common short-circuited conducting sleeve, such as round or rectangular conductor Welding forms annulus etc., and sandwich style damping structure, which can also be replaced by, wraps up outside conducting wire or cover upper one layer of damping material Material, it is the same that similar air conditioner copper pipe puts on insulating sponge casing.

Attached drawing 2 is the signal that short-circuited conducting sleeve and voice coil constitute loosely coupled transformer.Actually short-circuited conducting sleeve can be set in voice coil Neighbouring any position, as long as meeting the needs of loosely coupled transformer.Such as given three kinds in figure: being placed on the bottom of voice coil Portion, top, side etc., optimal setting are short-circuited conducting sleeves and voice coil is coaxial or almost coaxial.

Attached drawing 3 is the photo that commercially available earphone adds sandwich style damping short-loop, and before Zuo Weiwei adds, the right side is to cover after earphone It is directed at headphone driver, in addition 40*30 millimeters of damping short-loops.Earphone is commercially available earphone, the gloomy Hai Saier of model in figure hd600。

Attached drawing 4 is to stick 50*44 millimeters on the panel of commercially available high pitch loudspeaker scan-speaker D2905/930000 Sandwich style damping short-loop, practical sense of hearing tone color improve it is obvious, it is more penetrating sweet.

Attached drawing 5 is the rear along accumulation frequency spectrum of the unit of Fig. 4, is commonly called as overboard figure.The above is not add damping short-loop, below It is the same unit after 50*44 millimeters of circular ring shape sandwich style damping short-loop is sticked on panel rear along accumulation frequency spectrum.

Specific embodiment

Embodiment 1

As shown in figure 3, short-circuited conducting sleeve is by 0.3 in the back online sandwich style damping short-loop for adding 40*30 millimeters of commercially available earphone Two layers of circular sponge of 30 millimeters of 40 internal diameter of outer diameter of millimeters thick, the copper foil of one 30 microns 39 internal diameters 31 of thick outer diameter of centre folder Annulus, the damping short-loop for the structure that sandwiches are glued each other.Short-circuited conducting sleeve center is directed at the driver setting of earphone, glue Conjunction covers after earphone, and the voice coil of copper foil annulus and driver forms loosely coupled transformer.Practical audition test shows to improve bright Aobvious, music detail increases, and sound field width increases, and phonotape and videotape is more lively, and the sweet degree of tone color improves, and bass dynamics improves obvious.

Embodiment 2

As shown in figure 4, the circular sandwich style damping short-loop by 50*44 millimeters is attached to the panel of common high pitch loudspeaker On, around the sound film and voice coil of high pitch, short-circuited conducting sleeve and voice coil form a loosely coupled transformer.Practical sense of hearing tone color has obviously Improve.It is rear to improve obviously along response along accumulative frequency spectrum after actual measurement.

The design can be used in the design or improvement of any electromagnetic driver, including but not limited to loudspeaker, earphone or The design of earplug and the further improvement of commercially available finished product.While the simple modifications or deterioration of any pair of present design: such as handle Three-decker is changed to two-layer structure, using a damping material annulus and a short-circuited conducting sleeve；Damping material replaces with any other Common or emerging damping material；Manufacturing method is replaced by common manufacturing method, glued after being such as punched, die casting, It brushes, spraying, dip-coating etc.；Belong to the covering scope of present techniques.

Claims

1. the voice coil of a kind of sandwich style damping short-loop of electromagnetic driver, short-circuited conducting sleeve and driver forms loose coupling transformation Device, which is characterized in that short-circuited conducting sleeve upper and lower surface made of metal good conductor foil covers and apply damping by two layers of damping material, should Damping is mapped on the voice coil of driver by loosely coupled transformer.

2. a kind of contactless damper of loosely coupled transformer, by receiving coil, sandwich style damping short-loop constitutes one Loosely coupled transformer, receiving coil are installed in the equipment for needing non-contact damping, and damping short-loop is mounted on the base, special Sign is that short-circuited conducting sleeve upper and lower surface covers and apply damping by two layers of damping material, which is mapped by loosely coupled transformer It is further applied in equipment on to reception voice coil.

3. by sandwich style damping short-loop described in claim 1, it is further characterized in that, two layers of damping material is not Same material and/or different thickness.

4. by sandwich style damping short-loop described in claim 1, it is further characterized in that, the damping material is using cross cutting Annulus is made, is glued on short-circuited conducting sleeve.

5. by sandwich style damping short-loop described in claim 1, it is further characterized in that, the damping material is using brush It applies, spray, dipping process is applied on short-circuited conducting sleeve.

6. by sandwich style damping short-loop described in claim 1, it is further characterized in that, the short-circuited conducting sleeve is by metallic conductor Line or foil are made, and with die casting in damping material, form circular damping short-loop.

7. by sandwich style damping short-loop described in claim 1, it is further characterized in that, the short-circuited conducting sleeve, which is that metal is good, leads Body line curves the welding of cyclic annular and both ends and is made, and damping material is sleeve-shaped, and short-circuited conducting sleeve welds protheca over the metal lines.

8. by sandwich style damping short-loop described in claim 1, it is further characterized in that, the short-circuited conducting sleeve is plain conductor Manufactured multiturn coil, damping material closely coat coil surface.