CN109218893B

CN109218893B - Multistage pull headphone

Info

Publication number: CN109218893B
Application number: CN201811455349.9A
Authority: CN
Inventors: 郭震
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2024-05-10
Anticipated expiration: 2038-11-30
Also published as: CN109218893A

Abstract

The invention discloses a multi-stage drawing headphone which is used for solving the technical problem of small adaptation range of the existing headphone. The multi-stage drawing headphone comprises two headphone hosts, a headphone beam and a flexible bag, wherein the headphone beam is adapted to the head of a user, the flexible bag is arranged on the headphone Liang Najuan and is contacted with the head of the user, a length adjusting device is arranged in the flexible bag, the length adjusting device is connected with the headphone hosts, and the flexible bag can stretch elastically; the top of the flexible package with the top interval of roof beam of wearing is predetermine the distance, constitutes flexible package's flexible space, when wearing the headphone, through flexible package's self-adaptation is adjusted length, and/or is adjusted length adjusting device's length for the earphone host computer is adapted to user's head. According to the invention, the multi-stage drawing mechanism is arranged, so that the adaptability of the headset is expanded, more people can be adapted, and the wearing comfort is improved.

Description

Multistage pull headphone

Technical Field

The invention relates to the field of headphones, in particular to a multi-stage drawing headphone.

Background

Headphones, which have a high quality hearing experience, have a high market proportion in headphone products, and mainly include components such as a headphone beam and a headphone host. Most existing headsets have no length adjusting mechanism or are provided with a single drawing length adjusting mechanism. The drawing length adjusting mechanism is usually composed of a sliding rail and a perforation sliding mechanism and is used for adjusting the height position of the earphone on the head beam, but the structural design is not ideal, the adapting range is small, most users wear the earphone uncomfortably, and the earphone is obvious in friction sound and even in friction sound to be harsh when sliding. The head cushion position in the middle of the head beam is usually adjusted in height by the sponge, and when a user wears the earphone, the sponge is compressed at the head top, so that the height adjustment can be realized, but the adjustment amount is small, the adjustment amplitude cannot be fixed, and the sponge is easy to deform and lose effectiveness, so that the adjustment function is lost.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a multi-stage drawing headphone, which is provided with a multi-stage drawing mechanism, expands the adaptability of the headphone, and can be adapted to more people.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The invention provides a multistage drawing headphone, which comprises two headphone hosts, a head beam and a flexible bag, wherein the head beam is adapted to the head of a user, the flexible bag is arranged on the head Liang Najuan and is contacted with the head of the user, a length adjusting device is arranged in the flexible bag, the length adjusting device is connected with the headphone hosts, and the flexible bag can stretch elastically;

the top of the flexible package with the top interval of roof beam of wearing is predetermine the distance, constitutes flexible package's flexible space, when wearing the headphone, through flexible package's self-adaptation is adjusted length, and/or is adjusted length adjusting device's length for the earphone host computer is adapted to user's head.

Optionally, the length adjustment device includes slip shell and slip inner shell, the slip shell with the tip inner wall fixed connection of flexible package, the slip inner shell with the tip inside wall fixed connection of wear beam, the flexible package removes one section surrounding layer at the tip and makes the slip shell with the slip inner shell is nested together, and the slip shell is in slidable on the slip inner shell, the slip shell is in be provided with first slip stop device between the slip inner shell and carry out the slip process spacing.

Optionally, the first sliding limiting device includes a first stop chute disposed on an outer side wall of the sliding inner shell, and a first stop elastic seat disposed on an inner side wall of the sliding outer shell, a raised grain is disposed on the first stop chute, a first elastic arm is correspondingly disposed on the first stop elastic seat, and in a sliding process of the sliding outer shell relative to the sliding inner shell, the first elastic arm on the first stop elastic seat slides on the raised grain on the first stop chute to limit the sliding process.

Or the end part of the first elastic arm is provided with a pulley, and in the sliding process of the sliding outer shell relative to the sliding inner shell, the pulley at the end part of the first elastic arm slides on the corrugation on the first stop sliding groove so as to limit the sliding process.

Optionally, the length adjusting device further includes an active sliding arm, the earphone host is mounted at the lower end of the active sliding arm, the upper end of the active sliding arm is disposed in the sliding inner shell, the lower end of the sliding inner shell is provided with a channel corresponding to the active sliding arm, the active sliding arm is slidable relative to the head-mounted beam, and a second sliding limiting device is disposed between the active sliding arm and the head-mounted beam to limit the sliding process.

Optionally, the second sliding limiting device comprises a second stop elastic seat arranged at the upper end of the driving sliding arm and a second stop sliding groove arranged on the inner side wall of the end part of the head-mounted beam, the second stop sliding groove is provided with wavy grains, the second stop elastic seat is correspondingly provided with a second elastic arm, and in the sliding process of the driving sliding arm relative to the head-mounted beam, the second elastic arm on the second stop elastic seat slides on the wavy grains on the second stop sliding groove to limit the sliding process.

Or the end part of the second elastic arm is provided with a pulley, and in the sliding process of the driving sliding arm relative to the head-mounted beam, the pulley at the end part of the second elastic arm slides on the wavy line on the second stop sliding groove so as to limit the sliding process.

Optionally, the active sliding arm includes a left arm, a right arm and a clamping part, the clamping part is arranged at the lower ends of the left arm and the right arm, the lower ends of the left arm and the right arm are fixedly connected together, the active sliding arm is connected with the earphone host through the clamping part, and the earphone host can rotate around the axis of the clamping part;

optionally, a gap is provided between the left arm and the right arm, an axial through hole is correspondingly provided on the clamping portion, and the gap and the axial through hole form a cable channel of the earphone host.

Optionally, be provided with in the flexible package along flexible package length extension's elastic thread and elastic thread support, the elastic thread support is including the fixed part that has both ends, through fixed part with slide housing's upper end is connected fixedly, the both ends of elastic thread respectively with fixed part is connected, the elastic thread is for flexible package's flexible restoring force that provides.

Optionally, supporting pieces are arranged on the upper side and the lower side of the elastic thread, the supporting pieces isolate the elastic thread, the elastic thread support and the outer wrapping layer of the flexible bag, and the elastic thread, the elastic thread support and the outer wrapping layer of the flexible bag are supported.

Optionally, the middle part of the elastic thread is stitched and fixed with the supporting sheet, and two ends of the elastic thread are respectively stitched and fixed with the fixing part.

Optionally, the elastic thread is made of rubber or silica gel, the elastic thread support is made of TPU, the supporting piece is made of PET, the outer wrapping layer of the flexible bag is made of protein skin, and the head-wearing beam is made of stainless steel sheet.

Optionally, a sliding block is disposed on an inner side wall of the sliding outer shell, a sliding groove is correspondingly disposed on an outer side wall of the sliding inner shell, the sliding block is engaged with the sliding groove, the sliding outer shell is kept on the sliding inner shell, and the sliding outer shell is allowed to slide relative to the sliding inner shell.

The multistage drawing headphone has the advantages that:

the headset provided by the invention has the advantages that the wearing suitability is enhanced, more people can be matched, the headset can be worn for people with different head surrounding and ear positions, the range expansion of the head surrounding and head model is adapted, and the wearing comfort is improved.

The invention also improves the integrity of the earphone product, and all the adjusting motion mechanisms are designed inside the product, so that the outside of the product is attractive.

Drawings

FIG. 1 is a front view of a multi-stage pull-out headset of the present invention;

FIG. 2 is a perspective view of a multi-stage pull-out headset of the present invention;

FIG. 3 is an exploded view of the multi-stage pull-out headset of the present invention;

FIG. 4 is a partially exploded view of the multi-stage pull-out headset of the present invention (with the sliding inner housing fixedly attached to the headset Liang Rengran);

FIG. 5 is a partially exploded view of the multi-stage pull-out headset of the present invention (with the sliding inner housing and the headset Liang Yijing separated from each other);

FIG. 6 is a cross-sectional view of a multi-stage pull-out headset of the present invention;

FIG. 7 is a perspective view of a second stop spring seat of the multi-stage pull-out headset of the present invention;

FIG. 8 is a perspective view of a sliding inner shell of a multi-stage pull-out headset of the present invention;

FIG. 9 is a perspective view of a sliding housing of a multi-stage pull-out headset of the present invention;

FIG. 10 is a sliding extended state diagram of a headset main body of the multi-stage pull headset of the present invention;

FIG. 11 is a perspective view of a second detent chute of the multi-stage pull out headset of the present invention;

FIG. 12 is a perspective view of an active slider arm of the multi-stage pull-out headset of the present invention;

FIG. 13 is a perspective view of the cable of the multi-stage pull-out headset of the present invention;

Fig. 14 is a perspective view of a stretch wire holder of a multi-stage pull-out headset of the present invention.

In the figure: 1. a head beam; 2. a second stop chute; 3. an outer ring cladding; 4. a support sheet; 5. a cable; 5-1. A main body; 5-2, a first folding part; 5-3, a second folding part; 5-4, a third folding part; 6. an elastic wire bracket; 6-1, a fixing part; 6-2, elastic lines; 7. an inner ring cladding; 8. a sliding housing; 8-1. A main body; 8-2, a connecting part; 8-3, a first stop elastic seat; 8-4, sliding blocks; 9. sliding the inner shell; 9-1. A main body; 9-2, a first stop chute; 9-3, protruding blocks; 10. an active slider; 10-1, left arm; 10-2, a clamping part; 10-3, right arm; 11. an earphone host; 12. a second stop elastic seat; 12-1. A main body; 12-2, a second spring arm; 12-3, pulleys; 12-4, an axle; 12-5, screws.

Detailed Description

The design concept of the invention is as follows:

aiming at the defect of small adapting range of the headset in the prior art, the invention provides the multi-stage drawing headset, and the multi-stage drawing mechanism is arranged, so that the adapting performance of the headset is expanded, more people can be adapted, and the wearing comfort is improved.

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1,2, 3, 4, 5 and 6, in the embodiment 1 of the present invention, a multi-stage pull headphone is provided, which includes two headphone hosts 11, a headphone beam 1 adapted to the head of a user, and a flexible bag, wherein the flexible bag is disposed on an inner ring of the headphone beam 1 and contacts with the head of the user, a length adjusting device is disposed in the flexible bag, the length adjusting device is connected with the headphone hosts 11, and the flexible bag is elastically stretchable.

As shown in fig. 2, the flexible package is composed of an outer ring cladding layer 3 and an inner ring cladding layer 7, wherein the outer ring cladding layer 3 and the inner ring cladding layer 7 are outer cladding layers of the flexible package, and the outer ring cladding layer 3 and the inner ring cladding layer 7 are sewn together.

The top of flexible package and the top interval of roof beam 1 of putting on the head preset distance, constitute flexible package's flexible space, when wearing the headphone, through flexible package's self-adaptation length adjustment, and/or adjust length adjusting device's length for earphone host 11 adaptation is in user's head.

As shown in fig. 1, the headphones in this embodiment can achieve A, B, C length adjustments altogether, and the suitability of the headphones is expanded, and specific functional descriptions will be described below.

When the user wears the headphone, the top of the head can contact the top of the flexible bag, and the material of the flexible bag is telescopic, so that the top of the flexible bag can be adaptively and outwards expanded, and the interval distance between the top of the flexible bag and the top of the head-wearing beam 1 is reduced, namely the length of the A part in fig. 1 is adjusted. The stretching and retracting processes of the length adjustment at the position A are realized by self-adaptive adjustment, and manual adjustment is not needed.

After the user wears the headset, the two ends of the headset beam 1 will exert inward pressure, so that the headset host 11 applies pressure to the ears, thereby clamping the headset in place on the user's head.

As shown in fig. 4,5 and 6, the length adjusting device comprises a sliding outer shell 8 and a sliding inner shell 9, the sliding outer shell 8 is fixedly connected with the inner wall of the end part of the flexible bag, the sliding inner shell 9 is fixedly connected with the inner wall of the end part of the head-mounted beam 1, a section of outer cladding (a section on the outer ring cladding 3) is removed from the end part of the flexible bag so that the sliding outer shell 8 and the sliding inner shell 9 are nested together, the sliding outer shell 8 can slide on the sliding inner shell 9, and a first sliding limiting device is arranged between the sliding inner shells 9 for limiting a sliding process.

The sliding outer shell 8 is fixedly adhered to the end part of the inner ring cladding 7, the inner ring cladding 7 wraps the sliding outer shell 8, the sliding outer shell 8 is invisible from the outside on a finished headphone product, and if the sliding outer shell 8 and the sliding inner shell 9 do not slide, the sliding inner shell 9 cannot be seen, so that the design can improve the attractiveness of the product.

The first sliding limiting device comprises a first stop sliding groove 9-2 arranged on the outer side wall of the sliding inner shell 9 and a first stop elastic seat 8-3 arranged on the inner side wall of the sliding outer shell 8, the first stop sliding groove 9-2 is provided with wavy grains, the first stop elastic seat 8-3 is correspondingly provided with first elastic arms, and in the sliding process of the sliding outer shell 8 relative to the sliding inner shell 9, the first elastic arms on the first stop elastic seat 8-3 slide on the wavy grains on the first stop sliding groove 9-2 so as to limit the sliding process.

As shown in fig. 9, the first elastic stopper seat 8-3 is adhesively fixed to the inner side wall of the slide housing 8, and the first elastic arm on the first elastic stopper seat 8-3 is a triangular protrusion, and is elastically deformable by being pressed. The end of the first spring arm abuts against the first stopper slide groove 9-2, and generates a proper amount of sliding resistance, which can maintain the position of the slide outer housing 8 on the slide inner housing 9.

The end of the first spring arm needs to be designed in an arc shape so as to reduce friction resistance. When the end part of the first elastic arm reaches the high point of the corrugation, the deformation of the first elastic arm reaches the maximum, and then the end part of the first elastic arm enters the low point of the next corrugation, and the deformation of the first elastic arm is reduced.

The sliding adjustment between the sliding outer shell 8 and the sliding inner shell 9 is the length adjustment at B in fig. 1. The stretching process of the length adjustment at the position B is realized by self-adaptive adjustment or manual adjustment, and the retraction process is realized by manual adjustment.

It should be noted that, in fig. 1, the length adjustment at a and the length adjustment at B are coordinated, and when the user with a relatively large head circumference wears the device, the tension at the position a will reach a peak value, and when the tension exceeds the initial resistance at the position B, the tension at the position B will be triggered. The linkage of A department length adjustment and B department length adjustment can prevent that the user from feeling uncomfortable when wearing, realizes the protection to the earphone product. When a user with smaller head circumference wears the device, the stretching action of the position B cannot be triggered.

When the user wears the headset, on the premise that the length adjustment of the A part is not started, the length adjustment of the B part can be started first, and the sliding shell 8 is required to be manually stretched at the moment, so long as the user wearing can be met, and the user can feel comfortable wearing.

As shown in fig. 4, 5 and 6, the length adjusting device further includes an active slider 10, the earphone host 11 is mounted at the lower end of the active slider 10, the upper end of the active slider 10 is disposed in the sliding inner shell 9, a channel is disposed at the lower end of the sliding inner shell 9 corresponding to the active slider 10, the active slider 10 is slidable relative to the head-mounted beam 1, and a second sliding limiting device is disposed between the active slider 10 and the head-mounted beam 1 to limit the sliding process.

The second sliding limiting device comprises a second stop elastic seat 12 arranged at the upper end of the driving sliding arm 10 and a second stop sliding groove 2 arranged on the inner side wall of the end part of the head-mounted beam 1, the second stop sliding groove 2 is provided with wavy grains, the second stop elastic seat 12 is correspondingly provided with a second elastic arm 12-2, and in the sliding process of the driving sliding arm 10 relative to the head-mounted beam 1, the second elastic arm 12-2 on the second stop elastic seat 12 slides on the wavy grains on the second stop sliding groove 2 so as to limit the sliding process.

As shown in fig. 3, 4, 5, 7 and 11, the second stopping chute 2 is adhered and fixed on the inner side wall of the end portion of the head beam 1, the second stopping elastic seat 12 includes a main body 12-1, the main body 12-1 is integrally formed with a second elastic arm 12-2, and the second elastic arm 12-2 is elastically deformed under pressure. The end of the second spring arm 12-2 abuts against the second stop chute 2, so that a proper amount of sliding resistance is generated, and the position of the active slider arm 10 at the end of the head beam 1 can be maintained.

The end of the second spring arm 12-2 needs to be rounded to reduce frictional resistance. When the end of the second arm 12-2 reaches the high point of the corrugation, the deformation of the second arm 12-2 reaches a maximum, and then the end of the second arm 12-2 enters the low point of the next corrugation, and the deformation of the second arm 12-2 decreases.

The main body 12-1 is provided with a connecting hole, and four screws 12-5 are arranged to realize connection and fixation with the upper end of the driving sliding arm 10.

The sliding adjustment between the active slider arm 10 and the head-mounted beam 1 is the length adjustment at C in fig. 1. The stretching and retracting processes of the length adjustment at the position C are realized by manual adjustment.

It should be noted that, in fig. 1, when the length adjustment at a and the length adjustment at B still cannot meet the head circumference and the head shape of the user, the active slider 10 may be manually stretched to perform the length adjustment at C, so as to obtain a larger range of length adjustment of the earphone host 11.

When the user wears the headset, the length adjustment at the position A and the length adjustment at the position B can be started on the premise that the length adjustment at the position C is not started, and the user can feel comfortable to wear as long as the user wearing can be met.

As shown in fig. 12, the active slider arm 10 includes a left arm 10-1, a right arm 10-3 and a clamping portion 10-2, the clamping portion 10-2 is disposed at the lower ends of the left arm 10-1 and the right arm 10-3, the lower ends of the left arm 10-1 and the right arm 10-3 are fixedly connected together, the active slider arm is connected with the earphone host 11 through the clamping portion 10-2, and the earphone host 11 can rotate around the axis of the clamping portion 10-2.

The clamping part 10-2 is cylindrical, and a clamping groove or a clamping protrusion is arranged on the cylindrical surface and can be clamped with the earphone host 11, and the earphone host 11 is allowed to rotate around the axis of the clamping part 10-2, and the rotation angle is generally smaller than 360 degrees.

A gap is arranged between the left arm 10-1 and the right arm 10-3, and an axial through hole is correspondingly arranged on the clamping part 10-2, and the gap and the axial through hole form a cable channel of the earphone host 11.

As can be seen from fig. 6, the cable 5 of the earphone host 11 passes through the active slider arm 10, the sliding inner housing 9 and the sliding outer housing 8, and is laid in the flexible bag to connect the earphone hosts 11 on the left and right sides respectively.

Since the earphone host 11 is two, the sliding outer shell 8, the sliding inner shell 9 and the active slide arm 10 are symmetrically arranged on the left and right sides of the headphone.

As shown in fig. 4, 5, 6 and 14, the elastic thread 6-2 and the elastic thread bracket 6 extending along the length of the flexible bag are arranged in the flexible bag, the elastic thread bracket 6 comprises fixing parts 6-1 at two ends, the fixing parts 6-1 are connected and fixed with the upper end of the sliding shell 8, screws can be arranged at the connecting parts to realize connection and fixation, and connecting holes are formed at the connecting parts 8-2 of the sliding shell 8 as shown in fig. 9, and the fixing parts 6-1 of the elastic thread bracket 6 can be arranged at the screws to fix. The elastic wire 6-2 provides a restoring force for the expansion and contraction of the flexible bag.

The elastic thread bracket 6 can play a role in fixing the elastic thread 6-2, specifically, two ends of the elastic thread 6-2 are respectively stitched and fixed with the fixing part 6-1, the fixing part 6-1 is connected and fixed with the upper end of the sliding shell 8, and the elastic thread 6-2 is stretched and fixed by the fixing part 6-1.

The upper side and the lower side of the elastic line 6-2 are provided with supporting pieces 4, the supporting pieces 4 isolate the elastic line 6-2 and the elastic line support 6 from the outer wrapping layer of the flexible bag, and support the elastic line 6-2, the elastic line support 6 and the outer wrapping layer of the flexible bag. As can be seen from fig. 6, the support pieces 4 are inserted into the upper ends of the sliding housings 8 at both ends, thereby achieving the support effect of the elastic thread 6-2, the elastic thread support 6 and the outer wrapping of the flexible bag.

The inner side surface of the supporting sheet 4 is a smooth surface, and the outer side surface is a frosted surface. Namely: the lower surface of the upper supporting sheet 4 is a smooth surface, and the upper surface is a frosted surface; the upper surface of the lower supporting sheet 4 is a smooth surface, and the lower surface is a frosted surface. The design is favorable for the elastic deformation of the elastic line 6-2, and the supporting sheet 4 is not easy to slide and shift in the flexible bag, so that the shape of the flexible bag can be kept unchanged for a long time.

In order to reliably support the elastic thread 6-2, the middle part of the elastic thread 6-2 needs to be sewed and fixed with the supporting sheet 4.

Preferably, in the present embodiment, the main components are made of the following materials:

the elastic line 6-2 is made of rubber or silica gel, and has an elastic expansion function. The elastic thread 6-2 is flat, which is favorable for suture fixation.

The elastic thread support 6 is made of TPU (thermoplastic polyurethane elastomer rubber) and has a certain elasticity, allowing proper elastic deformation.

The supporting sheet 4 is made of PET (polyethylene terephthalate), has a certain elasticity, allows proper elastic deformation, has a certain strength, and can play a supporting role.

The outer wrapping layer of the flexible bag is made of protein leather, has proper elastic expansion function and has good hand feeling.

The head beam 1 is made of stainless steel sheet, has certain elasticity, allows proper elastic deformation, has better strength, and is a main supporting component of the headset.

As shown in fig. 8 and 9, the slide block 8-4 is provided on the inner side wall of the slide outer case 8, the slide groove is provided on the outer side wall of the slide inner case 9 correspondingly, and the slide block 8-4 is fitted with the slide groove, holds the slide outer case 8 on the slide inner case 9, and allows the slide outer case 8 to slide with respect to the slide inner case 9.

Two sliding blocks 8-4 can be arranged on the inner side walls of the two sides of the sliding outer shell 8, and two sliding grooves are correspondingly arranged on the outer side walls of the two sides of the sliding inner shell 9. It is also possible to provide a slide block 8-4 only on the inner side wall of the slide outer housing 8 on the other side with respect to the first stopper elastic seat 8-3, and a slide groove on the outer side wall of the slide inner housing 9 on the other side with respect to the first stopper slide groove 9-2, and to hold the slide outer housing 8 on the slide inner housing 9 in cooperation with the structural relationship of the first stopper elastic seat 8-3 and the first stopper slide groove 9-2, and to allow the slide outer housing 8 to slide with respect to the slide inner housing 9.

The sliding inner shell 9 is also required to be adhered and fixed on the inner side wall of the end part of the head beam 1, and a plurality of protruding blocks 9-3 are further arranged on two sides of the inner wall of the sliding inner shell 9 so as to be matched with grooves on two sides of the second stop sliding groove 2, so that the sliding inner shell 9 and the second stop sliding groove 2 are combined.

As shown in fig. 13, a first folding portion 5-2 is provided at the top of the cable 5, and a second folding portion 5-3 and a third folding portion 5-4 are provided at both sides of the cable, wherein the first folding portion 5-2, the second folding portion 5-3 and the third folding portion 5-4 are reserved expansion margins, and when the cable 5 is stretched, the three folding portions can be stretched accordingly, so that the cable 5 is protected from being pulled.

In summary, the multi-stage pull headphone in this embodiment enhances the wearing suitability, and can be adapted to more people, so that the headphone can be worn for people with different head sizes and ear positions, and the range expansion of the head sizes and the head shapes is adapted, so that the wearing comfort is improved.

The multistage pull headphone in this embodiment has still improved the wholeness of earphone product, and all regulation motion mechanism designs inside the product, and the product outside is more pleasing to the eye.

Example 2

In this embodiment, unlike in embodiment 1, the end of the second arm 12-2 is provided with a pulley 12-3 as shown in fig. 7, the pulley 12-3 is fixed to the end of the second arm 12-2 by a shaft 12-4 made of metal, and the pulley 12-3 is rotatable on the shaft 12-4.

The pulley 12-3 is made of PC plastic or soft rubber.

During the sliding of the active slide arm 10 relative to the head beam 1, the pulley 12-3 at the end of the second spring arm 12-2 slides over the corrugation on the second stop chute 2 to limit the sliding process.

When the pulley 12-3 reaches the high point of the corrugation, the deformation of the second spring arm 12-2 reaches the maximum, and then the pulley 12-3 enters the low point of the next corrugation, and the deformation of the second spring arm 12-2 decreases.

By arranging the pulley 12-3, the sliding friction of the contact point is changed into rolling friction, the service life is prolonged, the sound during sliding is greatly reduced, and the noise generated in the sliding process of the driving sliding arm 10 can be remarkably reduced.

Preferably, the end of the first spring arm on the first stop elastic seat 8-3 can also be provided with a pulley under the condition of structural permission, and during the sliding process of the sliding outer shell 8 relative to the sliding inner shell 9, the pulley at the end of the first spring arm slides over the corrugation on the first stop sliding chute 9-2 so as to limit the sliding process. This design enables a significant reduction of noise generated during sliding of the sliding outer shell 8 relative to the sliding inner shell 9.

Other structures of the multi-stage drawing headphone in this embodiment are the same as those in embodiment 1, and a description thereof will not be repeated here.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The multi-stage drawing headphone comprises two headphone hosts and is characterized by further comprising a headphone beam and a flexible bag, wherein the headphone beam is adapted to the head of a user, the flexible bag is arranged on the headphone Liang Najuan and is contacted with the head of the user, a length adjusting device is arranged in the flexible bag and is connected with the headphone hosts, the flexible bag can elastically stretch and contract, the flexible bag consists of an outer ring cladding and an inner ring cladding, and the outer ring cladding and the inner ring cladding are the outer cladding of the flexible bag;

the top of the flexible bag is spaced from the top of the head beam by a preset distance to form a telescopic space of the flexible bag, and when the headset is worn, the headset host is adapted to the head of a user through the self-adaptive adjustment of the length of the flexible bag and/or the adjustment of the length adjusting device;

The length adjusting device comprises a sliding outer shell and a sliding inner shell, the sliding outer shell is fixedly connected with the inner wall of the end part of the flexible bag, the sliding inner shell is fixedly connected with the inner wall of the end part of the head beam, a section of outer wrapping layer is removed from the end part of the flexible bag so that the sliding outer shell and the sliding inner shell are nested together, the sliding outer shell can slide on the sliding inner shell, and a first sliding limiting device is arranged between the sliding inner shells for limiting a sliding process;

The length adjusting device further comprises an active sliding arm, the earphone host is mounted at the lower end of the active sliding arm, the upper end of the active sliding arm is arranged in the sliding inner shell, the lower end of the sliding inner shell is provided with a channel corresponding to the active sliding arm, the active sliding arm is slidable relative to the head-mounted beam, and a second sliding limiting device is arranged between the active sliding arm and the head-mounted beam to limit the sliding process.

2. The multi-stage sliding headphone according to claim 1, wherein the first sliding limiting means comprises a first stop chute provided on an outer side wall of the sliding inner case, and a first stop elastic seat provided on an inner side wall of the sliding outer case, the first stop chute being provided with a wavy line, the first stop elastic seat being correspondingly provided with a first elastic arm, the first elastic arm on the first stop elastic seat sliding over the wavy line on the first stop chute during sliding of the sliding outer case relative to the sliding inner case to limit a sliding process;

3. The multi-stage sliding headphone according to claim 1, wherein the second sliding limiting device comprises a second stop elastic seat arranged at the upper end of the active sliding arm, and a second stop sliding groove arranged on the inner side wall of the end part of the headphone beam, the second stop sliding groove is provided with a wavy line, the second stop elastic seat is correspondingly provided with a second elastic arm, and during the sliding process of the active sliding arm relative to the headphone beam, the second elastic arm on the second stop elastic seat slides on the wavy line on the second stop sliding groove so as to limit the sliding process;

4. The multi-stage pull-out headset of claim 1, wherein the active slide arm comprises a left arm, a right arm, and a clamping portion disposed at lower ends of the left arm and the right arm, the lower ends of the left arm and the right arm being fixedly connected together, the headset host being connected to the headset host by the clamping portion, the headset host being rotatable about an axis of the clamping portion;

A gap is arranged between the left arm and the right arm, an axial through hole is correspondingly arranged on the clamping part, and the gap and the axial through hole form a cable channel of the earphone host.

5. The multi-stage drawing headphone according to claim 1, wherein a spring wire and a spring wire holder are provided in the flexible bag, which extend along the length of the flexible bag, the spring wire holder includes fixing portions at both ends, the fixing portions are connected and fixed with the upper end of the slide case, both ends of the spring wire are respectively connected with the fixing portions, and the spring wire provides a restoring force for the expansion and contraction of the flexible bag.

6. The multi-stage pull-out headset of claim 5, wherein the elastic wire is provided with support tabs on both upper and lower sides thereof, the support tabs isolating the elastic wire, the elastic wire support from the outer cover of the flexible bag and supporting the elastic wire, the elastic wire support, and the outer cover of the flexible bag;

The middle part of the elastic thread is sewed and fixed with the supporting piece, and the two ends of the elastic thread are respectively sewed and fixed with the fixing part.

7. The multi-stage drawing headphone of claim 6, wherein the elastic wire is made of rubber or silica gel, the elastic wire support is made of TPU, the support piece is made of PET, the outer wrapping layer of the flexible bag is made of protein skin, and the headphone beam is made of stainless steel sheet.

8. The multi-stage drawing headphone of claim 1, wherein a slide block is provided on an inner side wall of the slide housing, a slide groove is provided on an outer side wall of the slide inner housing, the slide block is engaged with the slide groove, the slide outer housing is held on the slide inner housing, and the slide outer housing is allowed to slide with respect to the slide inner housing.