CN108683967A - A kind of helmet - Google Patents
A kind of helmet Download PDFInfo
- Publication number
- CN108683967A CN108683967A CN201810284787.7A CN201810284787A CN108683967A CN 108683967 A CN108683967 A CN 108683967A CN 201810284787 A CN201810284787 A CN 201810284787A CN 108683967 A CN108683967 A CN 108683967A
- Authority
- CN
- China
- Prior art keywords
- button
- sliding
- elastic arm
- headband
- sliding rail
- 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.)
- Granted
Links
- 238000003756 stirring Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1008—Earpieces of the supra-aural or circum-aural type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
Abstract
Include the headband of the unit and connection unit positioned at head on both sides the invention discloses a kind of helmet, unit is provided with sliding rail, several adjusting card slots are distributed on the side wall of sliding rail；The end set of headband has sliding button and fixed button；The end of headband is inserted into together with sliding button and fixed button in sliding rail, is slided and is provided with elastic arm on button；Fixed button is slidably arranged on sliding button, when fixed button slides into first position, struts elastic arm, and elastic arm is made to engage with card slot is adjusted, and locking headband loosens elastic arm when fixed button slides into the second position, and elastic arm is made to engage with card slot releasing is adjusted.The elastic arm for sliding button is strutted or loosened by the push-and-pull of fixed button, the cooperation of card slot is adjusted using elastic arm and sliding rail, realizes that the length of helmet is adjustable, it is easy to adjust, it wears more comfortable.
Description
Technical field
The present invention relates to wearable device technical field, more particularly to a kind of helmet.
Background technology
Currently, wear class equipment, especially headphone, due to comfortable wearing, the feature that sound quality is excellent and closure is good,
By many user's favors for pursuing sound quality.Since many users are very long using the time of earphone, it is desirable that earphone can wear
It wears comfortably, and everyone head sizes are not quite identical, so that the earphone of batch production can be suitble to everyone
Head sizes reach comfortable wearing, become to design one of an important factor for considering required for headphone.
Existing headphone is adapted to different users by adjustable mode in the market, and a kind of regulative mode is setting
Metal adjusting rod realizes the adjusting of length, but metal adjusting rod can undoubtedly make by the pull between metal adjusting rod and headband
The weight of earphone increases, and long-time wearing comfort reduces；Another kind is to pass through gear and sliding rail by gear and rail structure
Pull realize and adjust that however sliding rail is after long-time pull, adjusting feel can weaken with the increase of number, lead to pine
Relaxation position inaccurate.
Invention content
The problem of cannot being adapted to different users' head sizes in view of helmets such as prior art headphones, it is proposed that
A kind of helmet of the present invention, realizes that the length of helmet is adjustable, comfortable wearing.
To achieve the goals above, present invention employs following technical solutions：
A kind of helmet includes the headband of the unit and the connection unit positioned at head on both sides, described
Unit is provided with sliding rail, and several adjusting card slots are distributed on the side wall of the sliding rail；
The end set of the headband has sliding button and fixed button；The end of the headband is together with the sliding button
It is inserted into the sliding rail with the fixed button, elastic arm is provided on the sliding button；The fixed button sliding setting
On the sliding button, when the fixed button slides into first position, the elastic arm is strutted, makes the elastic arm and institute
It states and adjusts card slot engaging, headband loosens the elastic arm when the fixed button slides into the second position described in locking, makes institute
It states elastic arm with adjusting card slot releasing to engage, makes the headband can the relatively described sliding rail sliding.
Optionally, the fixed button, which slides into the second position, makes the elastic arm engage with adjusting card slot releasing
When, in the relatively described sliding rail sliding process of the headband, the elastic arm of the sliding button slips over from the adjusting card slot, and
A part for the elastic arm stretches into the adjusting card slot.
Optionally, the elastic arm is provided with two, and two elastic arms are moved closer to from fixing end to free end, institute
It includes ejection part to state fixed button, and the ejection part slides between two elastic arms, and the fixed button slides into
When one position, the ejection part struts two elastic arms, the fixed button sliding close to the free end of the elastic arm
When to the second position, the ejection part loosens two elastic arms close to the fixing end of the elastic arm.
Optionally, the ejection part is block-shaped protrusion, two contact surfaces of the block-shaped protrusion and the elastic arm contact
For inclined-plane.
Optionally, the sliding button is provided with the first locating groove and the second locating groove, the fixed button setting
There is registration arm, when the fixed button slides into first position and the second position respectively, the registration arm is respectively with described first
Locating groove and second locating groove engaging, keep the different conditions of the elastic arm.
Optionally, it is provided with guide rail on the sliding button, the registration arm is slided in the guide rail.
Optionally, the free end of the elastic arm and the registration arm is both provided with protrusion, and the elastic arm passes through described
Raised to engage with the adjusting card slot, the registration arm passes through the protrusion and first locating groove and second positioning
Card slot engages.
Optionally, the sliding rail be the open sliding rail in outside, the sliding button include the first slide block, described first group
Motion block stretches out above the sliding rail, when the elastic arm loosens, drives the headband to slide by stirring first slide block；
The fixed button includes the second slide block, and second slide block stretches out above the sliding rail, by stirring
State the position that the second slide block adjusts the relatively described sliding button of the fixed button.
Optionally, the headband is slidably arranged in the sliding rail bottom, and the slide block both sides of the sliding button are provided with
Position limiting structure, the position limiting structure are clamped with the sliding rail side wall, are limited the sliding button and are slided in the sliding rail length direction
It is dynamic.
Optionally, the headband is provided with location hole, and the sliding button is provided with positioning column, and the positioning column is inserted into institute
It states location hole and connects the sliding button and the headband.
In conclusion the beneficial effects of the invention are as follows：
The elastic arm for sliding button is strutted or loosened by the push-and-pull of fixed button, is adjusted and is blocked using elastic arm and sliding rail
The cooperation of slot realizes that the length of helmet is adjustable, and the push-and-pull of fixed button is easy to adjust, and the headband of adjustable-length is worn more
Comfortably.Relative to existing technologies, the metal adjusting rod with supporting role need not be used, so lighter in weight, when can be long
Between comfortable wearing；Fixed resilient engagement button realization elastic arm and adjust card slot is pushed and pulled by active, is not easy to loosen, uses the longevity
Life length.
Description of the drawings
Fig. 1 is the explosive view of helmet of the present invention；
Fig. 2 is the sliding rail schematic diagram of helmet of the present invention；
Fig. 3 is the sliding button side view of helmet of the present invention；
Fig. 4 is the sliding button stereogram of helmet of the present invention；
Fig. 5 is the fixation button stereogram of helmet of the present invention；
Fig. 6 is the status diagram of the elastic arm locking headband of helmet of the present invention；
Fig. 7 is the upward view of Fig. 6 state lower slider buttons and fixed button；
Fig. 8 is that the elastic arm of helmet of the present invention releases the status diagram of locking headband；
Fig. 9 is the upward view of Fig. 8 state lower slider buttons and fixed button；
Figure 10 is the headband stereogram of helmet of the present invention；
Figure 11 is the headband and sliding rail sectional view of helmet of the present invention；
Figure 12 is the overview after helmet of the present invention assembling；
In figure, 1, headband；11, location hole；2, sliding rail；21, card slot is adjusted；3, button is slided；31, elastic arm；311, convex
It rises；32, the first slide block；33, guide rail；34, the first locating groove；35, the second locating groove；36, positioning column；37, limit knot
Structure；4, fixed button；41, the second slide block；42, ejection part；43, registration arm；431, raised；5, unit.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The present invention technical concept be：The clamping engagement that card slot is adjusted using elastic arm and sliding rail is pressed by pushing and pulling fixation
Key struts or loosens elastic arm, realizes that the length of helmet is adjustable, and the push-and-pull of fixed button is easy to adjust, can be adapted to not
With the head sizes of user, keep wearing more comfortable.Relative to existing technologies, the gold with supporting role need not be used
Belong to adjusting rod, so lighter in weight, it can long-time comfortable wearing；It pushes and pulls fixed button by active and realizes elastic arm and adjust and block
The resilient engagement of slot is not easy to loosen, and service life is long.
Fig. 1 to 12 schematically shows one embodiment of this helmet.Shown in 12, one kind is worn
Equipment includes the headband 1 of the unit 5 and connection unit 5 positioned at head on both sides, in Fig. 1 to 12 illustrated embodiments with
For headphone, the unit 5 includes left earphone and right earphone.Certainly, unit 5 can also be with heat preservation
Or the ear packet etc. of mute function, details are not described herein.
Unit 5 is provided with sliding rail 2, and several adjusting card slots 21 are distributed on the side wall of sliding rail 2.As shown in Fig. 2, several
Card slot 21 is adjusted along the side wall that the length direction of sliding rail 2 is evenly distributed on sliding rail 2.
The end set of headband 1 has sliding button 3 and fixed button 4.The end of headband 1 is together with sliding button 3 and fixes
Button 4 is inserted into sliding rail 2, is slided and is provided with elastic arm 31 on button 3.Fixed button 4 is slidably arranged on sliding button 3, Gu
When determining button 4 and sliding into first position, elastic arm 31 is strutted, elastic arm 31 is made to engage with card slot 21 is adjusted, locking headband 1, Gu
When determining button 4 and sliding into the second position, loosen elastic arm 31, so that elastic arm 31 is engaged with the releasing of card slot 21 is adjusted, make headband 1 can
Opposite sliding rail 2 slides.The state difference that the state and headband 1 of 1 locking of headband release locking is as shown in Figure 6 and Figure 8.
In the present embodiment, button 4 is fixed by push-and-pull to strut or loosen elastic arm 31, so that it may so that elastic arm 31 and tune
It saves the engaging of card slot 21 or releases engaging, realize that the length of helmet is adjustable, it is simple in structure, it is easy to adjust, difference can be adapted to
The head sizes of user keep wearing more comfortable.Each structure can be used plastic-injection and be formed, and need not use has support
The metal adjusting rod of effect, lighter in weight, wearing will not feel exhausted for a long time；Bullet between elastic arm 31 and adjusting card slot 21
Property cooperation, abrasion it is small, be not easy to loosen, service life is long.
In the present embodiment, fixed button 4 slide into the second position make elastic arm 31 with adjust card slot 21 release engage when,
Headband 1 is slipped over respect to the elastic arm 31 in 2 sliding process of sliding rail, sliding button 3 from adjusting card slot 21, and the one of elastic arm 31
Part, which is stretched into, to be adjusted in card slot 21, in this way, making to generate interrupted resistance sense in sliding process.As shown in Fig. 8 status diagrams, headband
Elastic arm 31 can still be contacted with card slot 21 is adjusted when 1 sliding, and when contact gives resistance feel, convenient for users to knowing elasticity
Arm 31 and the position relationship for adjusting card slot 21, convenient for locking is accurately positioned during slide head band 1.
Button and fixed press-key structure are slided as shown in Fig. 3 to 5, the elastic arm 31 of sliding button 3 is provided with two, two
Elastic arm 31 is moved closer to from fixing end to free end, and fixed button 4 includes ejection part 42, and ejection part 42 is in two elastic arms 31
Between slide, when fixed button 4 slides into first position, ejection part 42 struts two elasticity close to the free end of elastic arm 31
Arm 31, as shown in Fig. 7 upward views.When fixed button 4 slides into the second position, ejection part 42 close to elastic arm 31 fixing end,
Loosen two elastic arms 31, as shown in Fig. 9 upward views.
As shown in Fig. 5,7 and Fig. 9, ejection part 42 is block-shaped protrusion, and contacted with elastic arm 31 two of block-shaped protrusion contact
Face is inclined-plane.Inclined design is conducive to reduce resistance, convenient for pushing fixed button 4, easily realizes strutting for elastic arm 31.
As shown in figure 3, sliding button 3 is provided with the first locating groove 34 and the second locating groove 35, fixed button 4 is arranged
Have a registration arm 43, when fixed button 4 slides into first position and the second position respectively, registration arm 43 respectively with the first locating groove
34 and second locating groove 35 engage, keep elastic arm 31 different conditions.
Preferably, as shown in figure 3, being provided with guide rail 33 on sliding button 3, the sliding in guide rail 33 of registration arm 43, to
It can remain concordant with the first locating groove 34 and the second locating groove 35, be clamped accurate positioning.
In the present embodiment, as shown in Fig. 3 to 5, the free end of elastic arm 31 and registration arm 43 is both provided with protrusion, elasticity
Arm 31 is engaged by protrusion 311 with card slot 21 is adjusted, and registration arm 43 is positioned by protrusion 431 and the first locating groove 34 and second
Card slot 35 engages.Preferably, the sliding button 3 in the present embodiment and fixed button 4 are integrally formed by elastic material.
In the present embodiment, sliding rail 2 be the open sliding rail 2 in outside, sliding button 3 include the first slide block 32, first group
Motion block 32 stretches out 2 top of sliding rail, when elastic arm 31 loosens, drives headband 1 to slide by stirring the first slide block 32.Fixed button
4 include the second slide block 41, and the second slide block 41 stretches out 2 top of sliding rail, and button 4 is fixed by stirring the adjustment of the second slide block 41
The position of opposite sliding button 3, assembles overall diagram, the first slide block 32 and the second slide block 41 from open cunning as shown in figure 12
It stretches out in rail 2, can stir on the outside, facilitate the length for adjusting headband 2.
As shown in Figure 10, headband 1 is provided with location hole 11, and accordingly, sliding button 3 is provided with positioning column 36 (see Fig. 3),
Positioning column 36 is inserted into the connection of location hole 11 sliding button 3 and headband 1, as shown in Figure 11 sectional views.
Preferably, 1 is continued to refer to figure 1, in the present embodiment, headband 1 is slidably arranged in 2 bottom of sliding rail, and the two of sliding button 3
Side is provided with position limiting structure 37, and position limiting structure 37 is clamped with 2 side wall of sliding rail, and limit slippage button 3 is slided in 2 length direction of sliding rail
It is dynamic.
In conjunction with shown in Fig. 6 to Fig. 9, the present embodiment operation principle is introduced：
Under adjustable state, the operating position of fixed button 4 is as shown in FIG. 8 and 9, fixes the registration arm 43 of button 4 at this time
Engage with the second locating groove 35 of sliding button 3, the ejection part 42 of fixed button 4 and elastic arm 31, the sliding of sliding button 3
The protrusion 311 of the elastic arm 31 of button 3 is in loose mated condition with the adjusting card slot 21 of sliding rail 2, can push and pull cunning at this time
Dynamic button 3 adjusts headband 1 to suitable length, and during adjustment, and elastic arm 31 is touched with card slot 21 is adjusted, and makes slidable adjustment
With certain interrupted resistance feel；
It when adjusting to certain length, needs to fix, fixed button 4 is pushed to make registration arm 43 and slide button 3 at this time
First locating groove 34 engages, as shown in Figures 6 and 7, the ejection part 42 of fixed button 4 and elastic arm 31, the sliding of sliding button 3
The protrusion 311 of the elastic arm 31 of button 3 is in tight engagement with the adjusting card slot 21 of sliding rail 2, and headband 1 is relatively sliding at this time
Rail 2 is fixed, and locking structure is simple, and adjusting is facilitated to wear.
The above description is merely a specific embodiment, under the above-mentioned introduction of the present invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
Body description only preferably explains that the purpose of the present invention, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of helmet includes the headband of the unit and the connection unit positioned at head on both sides, feature
It is,
The unit is provided with sliding rail, and several adjusting card slots are distributed on the side wall of the sliding rail；
The end set of the headband has sliding button and fixed button；The end of the headband is together with the sliding button and institute
It states fixed button to be inserted into the sliding rail, elastic arm is provided on the sliding button；The fixed button is slidably arranged in institute
It states on sliding button, when the fixed button slides into first position, struts the elastic arm, make the elastic arm and the tune
Card slot engaging is saved, headband loosens the elastic arm when the fixed button slides into the second position described in locking, makes the bullet
Property the releasing of arm and the adjusting card slot engage, make the headband can the relatively described sliding rail slide.
2. helmet according to claim 1, which is characterized in that the fixed button slide into the second position make it is described
When elastic arm engages with adjusting card slot releasing, in the relatively described sliding rail sliding process of the headband, the sliding button
Elastic arm slips over from the adjusting card slot, and a part for the elastic arm stretches into the adjusting card slot.
3. helmet according to claim 1, which is characterized in that the elastic arm is provided with two, two bullets
Property arm is moved closer to from fixing end to free end, and the fixed button includes ejection part, and the ejection part is in two elasticity
It is slided between arm, when the fixed button slides into first position, the ejection part is strutted close to the free end of the elastic arm
Two elastic arms, when the fixed button slides into the second position, the ejection part close to the elastic arm fixing end,
Loosen two elastic arms.
4. helmet according to claim 1, which is characterized in that the ejection part is block-shaped protrusion, and the bulk is convex
It is inclined-plane to rise with two contact surfaces of the elastic arm contact.
5. helmet according to claim 1, which is characterized in that the sliding button be provided with the first locating groove and
Second locating groove, the fixed button are provided with registration arm, and the fixed button slides into first position and second respectively
When setting, the registration arm engages with first locating groove and second locating groove respectively, keeps the elastic arm
Different conditions.
6. helmet according to claim 5, which is characterized in that it is provided with guide rail on the sliding button, it is described fixed
Position arm slides in the guide rail.
7. helmet according to claim 5, which is characterized in that the free end of the elastic arm and the registration arm is equal
Be provided with protrusion, the elastic arm is engaged by the protrusion with the adjustings card slot, the registration arm by described raised and
First locating groove and second locating groove engaging.
8. helmet according to claim 1, which is characterized in that the sliding rail is the open sliding rail in outside, the cunning
Dynamic button includes the first slide block, and first slide block stretches out above the sliding rail, when the elastic arm loosens, by stirring
First slide block drives the headband sliding；
The fixed button includes the second slide block, and second slide block stretches out above the sliding rail, by stirring described the
Two slide blocks adjust the position of the relatively described sliding button of the fixed button.
9. helmet according to claim 1, which is characterized in that the headband is slidably arranged in the sliding rail bottom,
The both sides of the sliding button are provided with position limiting structure, and the position limiting structure is clamped with the sliding rail side wall, limits the sliding
Button is slided in the sliding rail length direction.
10. according to claim 1-9 any one of them helmets, which is characterized in that the headband is provided with location hole, institute
It states sliding button and is provided with positioning column, the positioning column is inserted into the location hole and connects the sliding button and the headband.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810284787.7A CN108683967B (en) | 2018-04-02 | 2018-04-02 | Head-mounted equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810284787.7A CN108683967B (en) | 2018-04-02 | 2018-04-02 | Head-mounted equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108683967A true CN108683967A (en) | 2018-10-19 |
| CN108683967B CN108683967B (en) | 2024-04-02 |
Family
ID=63800734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810284787.7A Active CN108683967B (en) | 2018-04-02 | 2018-04-02 | Head-mounted equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108683967B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110602593A (en) * | 2019-10-09 | 2019-12-20 | 蚌埠学院 | Anti-fracture earphone for English listening comprehension test |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638286A (en) * | 1992-05-25 | 1994-02-10 | Unex Corp | Headband for headphone |
| CN105163214A (en) * | 2015-07-30 | 2015-12-16 | 青岛歌尔声学科技有限公司 | Foldable headphone |
| WO2016059832A1 (en) * | 2014-10-15 | 2016-04-21 | 株式会社オーディオテクニカ | Headphone |
| CN106168709A (en) * | 2016-08-25 | 2016-11-30 | 青岛歌尔声学科技有限公司 | A kind of head-mounted display |
| CN106249416A (en) * | 2016-09-12 | 2016-12-21 | 歌尔科技有限公司 | Wear electronic product and VR product |
| CN206805010U (en) * | 2017-05-26 | 2017-12-26 | 潍坊歌尔电子有限公司 | VR wears structure |
| CN208241827U (en) * | 2018-04-02 | 2018-12-14 | 歌尔科技有限公司 | A kind of helmet |
-
2018
- 2018-04-02 CN CN201810284787.7A patent/CN108683967B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0638286A (en) * | 1992-05-25 | 1994-02-10 | Unex Corp | Headband for headphone |
| WO2016059832A1 (en) * | 2014-10-15 | 2016-04-21 | 株式会社オーディオテクニカ | Headphone |
| CN105163214A (en) * | 2015-07-30 | 2015-12-16 | 青岛歌尔声学科技有限公司 | Foldable headphone |
| CN106168709A (en) * | 2016-08-25 | 2016-11-30 | 青岛歌尔声学科技有限公司 | A kind of head-mounted display |
| CN106249416A (en) * | 2016-09-12 | 2016-12-21 | 歌尔科技有限公司 | Wear electronic product and VR product |
| CN206805010U (en) * | 2017-05-26 | 2017-12-26 | 潍坊歌尔电子有限公司 | VR wears structure |
| CN208241827U (en) * | 2018-04-02 | 2018-12-14 | 歌尔科技有限公司 | A kind of helmet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110602593A (en) * | 2019-10-09 | 2019-12-20 | 蚌埠学院 | Anti-fracture earphone for English listening comprehension test |
| CN110602593B (en) * | 2019-10-09 | 2020-08-21 | 蚌埠学院 | Anti-fracture earphone for English listening comprehension test |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108683967B (en) | 2024-04-02 |
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