CN104869483B - A kind of bracket that Quick extension locks automatically - Google Patents
A kind of bracket that Quick extension locks automatically Download PDFInfo
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- CN104869483B CN104869483B CN201510128137.XA CN201510128137A CN104869483B CN 104869483 B CN104869483 B CN 104869483B CN 201510128137 A CN201510128137 A CN 201510128137A CN 104869483 B CN104869483 B CN 104869483B
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- telescoping tube
- ejection
- mandril
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- tube
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Abstract
The invention discloses a kind of brackets that Quick extension locks automatically, including the first telescoping tube and the second telescoping tube, it is characterized by: being equipped with automatic locked component in second telescoping tube, the automatic locked component includes the ejection piece that one end is connected with the lower end of the first telescoping tube, the other end of the ejection piece is formed with an ejection part, a certain number of balls are distributed with centered on the ejection part in second telescoping tube, the ball is limited in the locating part below ejection part, the upper end of the locating part be provided with convenient for ejection part be inserted by ball outwardly against insert port, running through inside the ejection piece has the push pipe being slidably matched with the ejection piece, the lower end of the push pipe is fixedly connected with the lower end of locating part, running through inside the push pipe has mandril, it is formed on the mandril and pushes part, this pushes part and the upper end of push pipe offsets, institute The upper end for stating the first telescoping tube is provided with the push switch that a control mandril moves down.
Description
Technical field
The present invention relates to a kind of brackets that Quick extension locks automatically, are particularly suitable for use as microphone, guitar harmonics is rung
The bracket of equal equipment uses.
Background technique
Bracket on the equipment such as microphone, guitar harmonics sound, it usually needs be able to carry out flexible up and down.Currently, on the market
This bracket generally include to be connected to the outer tube on pedestal, be plugged with inner tube in outer tube, be provided with sandwiched wheat at the top of inner tube
The clamp of gram wind, people are usually internally provided with claw nut in outer tube and clamp to enable microphone holder to be freely lifted
Device, the device when in use unclamp nut, then inner tube are drawn high or forced down desired height, and with it is hand steered live again
It tightens nut realization to be fixedly clamped and be just able to achieve elevating function, very inconvenient when in use, operating process is complicated, needs pair
Hand cooperation, it is difficult to meet the requirement of people.
For this purpose, the Chinese invention of existing Patent No. ZL201020213960.3 discloses " a kind of microphone holder ", packet
An outer bar and an interior bar are included, one end of the interior bar is set in outer bar by a fixed mechanism, and the interior bar is in addition
One end is provided with control mechanism；The fixed mechanism includes one strutting pawl and one strutting block and one be provided with an inner core in interior bar,
Described one end for strutting pawl and interior bar being arranged in, the block that struts are arranged in the head end of inner core and can match with pawl is strutted
It closes；The control mechanism includes one passing through a spring groove, the compressed spring being provided in spring groove, inner core in the end of inner core
The end compression bar and control handle that are connected with, the spring groove can be fixed in interior bar, and the compressed spring is threaded through
On inner core, the other end of the compression bar is connect with control handle.
Although the flexible handle that need to only be held with a firm grip with pressing in foregoing invention achieves that the movable telescopic of interior bar, and interior bar
It stretches to when needing height, the positioning of interior bar and outer bar then can be achieved in release flexible handle, realizes that the height of microphone is fixed
Position.But pawl is easily damaged in use, and in the long-term use, interior bar and outer bar easily go out for strutting in the invention
It now fails, in addition, causing outer bar and interior bar in lock state when the breakthrough of the active force of outer bar struts pawl, interior bar contracting occur
The situation of returning, there are some potential safety problemss.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the status of the prior art, provide what a kind of Quick extension locked automatically
Bracket, the bracket can be realized bracket Quick extension.Locking is realized in stretching process simultaneously, operation simple with structure
It is convenient, use the feature that the safe and service life is long.
The technical scheme of the invention to solve the technical problem is: a kind of bracket that Quick extension locks automatically,
Including the first telescoping tube and the second telescoping tube, which is sheathed in second telescoping tube, it is characterised in that: described
Automatic locked component is equipped with positioned at the lower end of first telescoping tube in two telescoping tubes, which includes one end and the
The connected ejection piece in the lower end of one telescoping tube, the lower end direction of the other end toward the second telescoping tube of the ejection piece extends to form
There is an ejection part, a certain number of and the second telescoping tube inner wall is distributed with centered on the ejection part in second telescoping tube
Adjacent ball, the ball are limited in the locating part below ejection part, and the upper end of the locating part is provided with convenient for ejection part
Insertion to by ball outwardly against insert port, through there is the push pipe being slidably matched with the ejection piece inside the ejection piece,
The lower end of the push pipe is fixedly connected with the lower end of locating part, through there is mandril inside the push pipe, is formed with and is pushed on the mandril
Part, this pushes part and the upper end of push pipe offsets, and the upper end of first telescoping tube is provided with a control mandril and moves down
Push switch.
The locating part includes upper cover and lower cover, and the insert port is opened on lid, which has upwardly extended
A certain number of columns for being used to form ball accommodation space, the upper end of the column are inwardly formed the upper end for acting on upper cover
The hook portion of face periphery.
The upper end of the ejection piece offers a spring cavity, and a spring, the upper end of the push pipe are equipped in the spring cavity
It is formed with a flange being slideably positioned in inside the spring cavity, the lower end surface of a spring and flange offsets.
The guide part playing the guiding role with the second flexible inside pipe wall sliding setting is formed in the middle part of the ejection piece.
The ejection part outer wall of the ejection piece has an intilted taper.
The upper end of first telescoping tube is equipped with a shell, and push switch is articulated with the enclosure interior, can in the shell
Mobile to be equipped with a slanted kicking block, which has an inclined-plane, and the inclined-plane and mandril upper end interact, and push switch has one
Press section is equipped with reset spring between the press section and shell, after the stress of press section, push switch pushes slanted kicking block mobile, from
And mandril is forced to move down.
An adjusting screw is connected on the slanted kicking block, which offsets with push switch.
The shell is equipped with the discharge cock for preventing push switch from rotating.
It is arranged with third telescoping tube outside second telescoping tube, is located under second telescoping tube in the third telescoping tube
End is equipped with above-mentioned automatic locked component.
The lower end of the third telescoping tube is connected with a base body, along base body circumferential direction in the base body
It is provided with three communicated with upper space or three or more hinged groove, foot tube, the pedestal are hinged in each hinged groove
Main body, which is equipped with, to be equipped on pedestal switch for compressing or unclamping pedestal around the pedestal switch that third telescoping tube rotates
The base upper cover of switch, is equipped with a certain number of grooves along the periphery of the base upper cover on the base upper cover, and the pedestal is opened
The periphery of pass is equipped with through slot compatible with the hinged groove in base body, is formed between two adjacent through slots for stopping
The limiting section that foot tube is closed up upwards, when groove and through slot and hinged groove axially through when, foot tube is closed up recessed to base upper cover
In slot.
Compared with prior art, due to the present invention has the advantages that the present invention by configuring ejection piece, locating part, ball
And push switch, the first telescoping tube is pulled, which can be realized Quick extension, after the stretching, extension of the first telescoping tube,
When not pressing push switch, the first telescoping tube cannot be retracted, and realize locking effect, and in the whole process, the first telescoping tube is only
Tensible and cannot retract, while Quick extension, realize automatic locking, need to retract first it is flexible when, pressing pressing
Switch, retract at the same time the first telescoping tube, can be realized, have the characteristics that it is easy to operate, in addition, ability invention is crowded using ejection piece
Nip drum pearl, when non-push switch is closed, it is flexible to act on first so that ball and the second flexible inside pipe wall generate frictional resistance
Downward force on pipe is bigger, and the frictional resistance is also bigger, so that the first telescoping tube and the mutual deadlock of the second telescoping tube are realized,
Improve bracket using safe, meanwhile, have structure simple, ball and tube wall use steel, have with long service life excellent
Point.
Detailed description of the invention
Fig. 1 is the decomposition texture schematic diagram of the embodiment of the present invention；
Fig. 2 is partial enlarged view in Fig. 1；
Fig. 3 is the outline structural diagram after Fig. 1 installation；
Fig. 4 is the cross-sectional view of Fig. 3 middle housing part；
Fig. 5 is the cross-sectional view of telescopic pipe sections in Fig. 3；
Fig. 6 is the structural schematic diagram that pedestal switch limiting section stops foot tube in Fig. 3；
Fig. 7 is the cross-sectional view of Fig. 6；
Fig. 8 is the structural schematic diagram in Fig. 6 after 120 degree of pedestal switch rotary；
Fig. 9 is the cross-sectional view of Fig. 8；
Figure 10 is structural schematic diagram when foot tube collapses in Fig. 8；
Figure 11 is the cross-sectional view of Figure 10.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Fig. 1 to 11, the invention discloses a kind of brackets that Quick extension locks automatically, including the first telescoping tube 13
With the second telescoping tube 14, which is sheathed in second telescoping tube 14.
Wherein, it is equipped with automatic locked component positioned at the lower end of first telescoping tube 13 in the second telescoping tube 14, this is automatic
Locked component includes the ejection piece 6 that one end is connected with the lower end of the first telescoping tube 13, is formed in the middle part of ejection piece 6 and stretches with second
The guide part 61 that the sliding setting of 14 inner wall of the draw play the guiding role, it is flexible that guide part 61 plays the first telescoping tube of raising 13 and second
With respect to the guiding role of sliding between pipe 14, the other end of the ejection piece 6 extends shape toward the lower end direction of the second telescoping tube 14
Cheng Youyi ejection part 62, which has an intilted taper, with the ejection in second telescoping tube 14
Three balls 8 adjacent with the inner wall of the second telescoping tube 14 are evenly equipped with centered on portion 62, which is manufactured using steel, the rolling
Pearl 8 is limited in the locating part of 62 lower section of ejection part, for the ease of ball 8 is installed in locating part, the locating part
Including upper cover 71 and lower cover 72, which upwardly extends a certain number of columns for being used to form ball accommodation space
73, the upper end of the column 73 is inwardly formed the hook portion for acting on the upper surface periphery of upper cover 71, which is provided with just
In ejection part 62 be inserted by ball 8 outwardly against insert port, through having and the ejection piece 6 is sliding inside the ejection piece 6
The push pipe 11 of dynamic cooperation, the upper end of ejection piece 6 offer a spring cavity, and a spring 10, the push pipe 11 are equipped in the spring cavity
Upper end be formed with a flange being slideably positioned in inside the spring cavity, a spring 10 and the lower end surface of flange offset, just
It is resetted in push pipe 11, the lower end of the push pipe 11 is fixedly connected with the lower end of lower cover 72, specifically, offers and be used on lower cover 72
The limit hole that push pipe 11 passes through, the push pipe 11 are fixedly connected by a circlip 91 with lower cover 72, and running through inside the push pipe 11 has top
Bar 12 is formed on the mandril 12 and pushes part, this pushes part and the upper end of push pipe offsets, this pushes part and is arranged on mandril,
Push pipe is pushed when moving down for mandril, therefore, in embodiments of the present invention, for the ease of by tearing open, it is another card that this, which pushes part,
The upper surface of spring 91, another circlip 92 and 11 flange of push pipe offsets, and the upper end of first telescoping tube 13 is provided with a control
The push switch that mandril processed moves down.In addition, three or three or more can be arranged in order to increase the spread length of bracket
Telescoping tube in the present invention can also be using three telescoping tubes be used, specifically, being arranged with third outside the second telescoping tube 14
Telescoping tube 5 is equipped with above-mentioned automatic locked component positioned at the lower end of second telescoping tube 14 in the third telescoping tube 5, this
Three telescoping tubes, 5 outer wall is arranged with sponge sleeve 23, plays a protective role.
In addition, realize that moving up and down for mandril 12 can have a variety of structures using button switch in the prior art, for example,
Button directly can be set on mandril 12, utilize spring reset.It is that operating handle, the specific structure of use are provided in the present invention
As follows, the upper end of first telescoping tube 13 is equipped with a shell 20, which includes left shell and right shell body, left shell and
Right shell body is arranged symmetrically, and is mutually permanently connected using screw, and push switch 16 is articulated with inside the shell 20, in the shell 20
Removable to be equipped with a slanted kicking block 19, which has an inclined-plane, and the inclined-plane and 12 upper end of mandril interact, the present invention
In, inclined-plane and 12 upper end of mandril pass through 24 transmitting forces of a bronze medal cap and are specifically arranged with a bronze medal cap in 12 upper end of mandril
24, the copper cap 24 and the inclined-plane of slanted kicking block 19 offset, by the way that copper cap 24 is arranged, it is therefore prevented that and 12 upper end of mandril is worn, and
After copper cap 24 is worn, then it is easily changed, meanwhile, copper cap 24 plays the role of protecting mandril 12, and push switch 16 has a pressing
Portion is equipped with reset spring 17 between the press section and shell 20, after the stress of press section, push switch 16 pushes slanted kicking block 19 to move
It is dynamic, so that mandril 12 be forced to move down.An adjusting screw 18 is connected on the slanted kicking block 19, the adjusting screw 18 and pressing
Switch 16 offsets, and the depth of slanted kicking block 19 is screwed in by adjusting screw 18, carrys out the stroke of control button switch 16, reacts and is
Slanted kicking block 19 it is mobile apart from length, adjust screw 18 and revolve deeper, the stroke of button switch 16 is bigger, what mandril 12 was pressed down
Distance is also bigger.In addition, in use, maloperation causes button switch depressed to bracket in order to prevent, is caused
One telescoping tube 13 retracts, and the shell 20 is equipped with the discharge cock for preventing push switch 16 from rotating.
In addition, being the structure of pedestal of the present invention, specifically, the lower end of third telescoping tube 5 connects as shown in Fig. 6 to 11
There is a base body 2, is circumferentially provided with three or three communicated with upper space along the base body 2 in the base body 2
A above hinged groove 21 is hinged with foot tube 1 in each hinged groove 21, and the base body 2 is equipped with can be around third telescoping tube 5
The pedestal switch 3 of rotation is equipped with the base upper cover 4 for compressing or unclamping pedestal switch 3, the bottom on the pedestal switch 3
Periphery in seat upper cover 4 along the base upper cover 4 is equipped with a certain number of grooves 41, the periphery of the pedestal switch 3 equipped with
The compatible through slot 31 of hinged groove 21 in base body 2, be formed between two adjacent through slots 31 for stop foot tube 2 to
On the limiting section 32 that closes up, when groove 41 and through slot 31 with hinged groove 21 axially through when, foot tube 1 is closed up to base upper cover 4
Groove 41 in.In use, rotating base upper cover 4, base upper cover 4 is moved up, and adjustment base switch 3 is rotated, so that pedestal switch 3
Limiting section 32 stop the hinged groove 21 in base body 2, then reversely rotate base upper cover 4, base upper cover 4 is pressed on pedestal
On switch 3, pedestal switch 3 is locked, as shown in Figure 8,9, at this point, preventing foot tube 1 from collapsing, microphone holder is improved and exists
Stability in use process；When after use, when needing to arrange bracket, using identical operation, lead on adjustment base switch 3
The position of slot 31 so that through slot 31 with the hinged groove 21 in base body 2 is axial communicates, then rotating base upper cover 4, so that bottom
Groove 41 in seat upper cover 4 is also communicated with the hinged groove 21 in base body 2, at this point, foot tube 1 will be collapsed, foot tube 1 can just
It is caught in the groove 41 of base upper cover 4, in this way, the occupied space of bracket is saved, convenient for the movement of bracket.
The operation principle of the present invention is that:
Pull the first telescoping tube 13, ejection piece 6 is moved toward far from locating part direction, the ball 8 in locating part always with top
The ejection part 62 of part 6 is kept at a distance out, the locking event resolves of ball 8, ensure that the first telescoping tube 13 being capable of free extension；And
When the first telescoping tube 13 receives down force, ejection piece 6 is mobile to locating part direction, and ejection part 62 is inserted into across insert port
In upper cover 71, the export-oriented ball 8 squeezed in locating part of ejection part 62 moves out ball 8, to squeeze the second telescoping tube 14
Inner wall, under the action of frictional resistance, to limit the retraction of the first telescoping tube 13；However, in 16 button of push switch,
Mandril 12 moves downward, and the circlip 91 on mandril 12 pushes push pipe 11 to move downward, and push pipe 11 has driven moving down for locating part, rolling
Pearl 8 is mobile toward the ejection part 62 far from ejection piece 6, so that the mutual extrusion effect between ejection part 62 and ball 8 is relieved, it is real
The retraction of the first telescoping tube 13 is showed.Similarly, opposite its principle of third telescoping tube 5 of the second telescoping tube 14 is identical, here just no longer
It repeats.
To sum up, the present invention pulls the first telescoping tube by configuring ejection piece 6, locating part, ball 8 and push switch 16
13, which can be realized Quick extension, after the stretching, extension of the first telescoping tube 13, when not pressing push switch 16, the
One telescoping tube 13 cannot retract, and realize locking effect, and in the whole process, the first telescoping tube 13 can only be stretched and cannot be contracted
It returns, while Quick extension, realizes automatic locking, when needing to retract the first telescoping tube 13, press push switch 16, simultaneously
Retract the first telescoping tube 13, can be realized, have the characteristics that it is easy to operate, in addition, ability invention using ejection piece 6 squeeze ball
8, so that ball 8 and 14 inner wall of the second telescoping tube generate frictional resistance, when non-push switch 16 is closed, it is flexible to act on first
Downward force on pipe 13 is bigger, and the frictional resistance is also bigger, to realize 14 phase of the first telescoping tube 13 and the second telescoping tube
Mutual deadlock, improve bracket using safe, meanwhile, have structure simple, ball 8 and tube wall use steel, have and use the longevity
Order long advantage.
Claims (10)
1. a kind of bracket that Quick extension locks automatically, including the first telescoping tube and the second telescoping tube, first telescoping tube are arranged
In in second telescoping tube, it is characterised in that: be equipped with automatically in second telescoping tube positioned at the lower end of first telescoping tube
Locked component, the automatic locked component include the ejection piece that one end is connected with the lower end of the first telescoping tube, the ejection piece it is another
The lower end direction of one end toward the second telescoping tube has extended to form an ejection part, in second telescoping tube with the ejection part is
A certain number of balls adjacent with the inner wall of the second telescoping tube are distributed in the heart, which is limited in the limit below ejection part
Position part in, the upper end of the locating part be provided with convenient for ejection part be inserted by ball outwardly against insert port, the ejection piece
Inside is through there is the push pipe being slidably matched with the ejection piece, and the lower end of the push pipe is fixedly connected with the lower end of locating part, the top
It through there is mandril inside pipe, is formed on the mandril and pushes part, this pushes part and the upper end of push pipe offsets, and described first is flexible
The upper end of pipe is provided with the push switch that a control mandril moves down.
2. bracket according to claim 1, it is characterised in that: the locating part includes upper cover and lower cover, the insert port
It is opened on lid, which upwardly extends a certain number of columns for being used to form ball accommodation space, the column
Upper end be inwardly formed the hook portion for acting on the upper surface periphery of upper cover.
3. bracket according to claim 1, it is characterised in that: the upper end of the ejection piece offers a spring cavity, should
A spring is equipped in spring cavity, the upper end of the push pipe is formed with a flange being slideably positioned in inside the spring cavity, a bullet
The lower end surface of spring and flange offsets.
4. bracket according to claim 3, it is characterised in that: be formed with and the second flexible inside pipe wall in the middle part of the ejection piece
The guide part that sliding setting play the guiding role.
5. bracket according to claim 3, it is characterised in that: the ejection part outer wall of the ejection piece has one to slope inwardly
Taper.
6. bracket according to claim 1, it is characterised in that: the upper end of first telescoping tube is equipped with a shell, presses
Compress switch and be articulated with the enclosure interior, in the shell move be equipped with a slanted kicking block, the slanted kicking block have an inclined-plane, the inclined-plane with
The interaction of mandril upper end, push switch have a press section, and reset spring, press section are equipped between the press section and shell
After stress, push switch pushes slanted kicking block mobile, so that mandril be forced to move down.
7. bracket according to claim 6, it is characterised in that: be connected with an adjusting screw, the adjusting on the slanted kicking block
Screw offsets with push switch.
8. bracket according to claim 6, it is characterised in that: the shell, which is equipped with, prevents push switch from rotating
Discharge cock.
9. bracket according to any one of claims 1 to 8, it is characterised in that: be arranged with third outside second telescoping tube
Telescoping tube, the interior lower end positioned at second telescoping tube of the third telescoping tube are equipped with above-mentioned automatic locked component.
10. bracket according to claim 9, it is characterised in that: the lower end of the third telescoping tube is connected with a pedestal
It is hinged to be circumferentially provided with three communicated with upper space or three or more in the base body along the base body for main body
Slot is hinged with foot tube in each hinged groove, and the base body is equipped with the pedestal that can be rotated around third telescoping tube and switchs,
Pedestal switch is equipped with the base upper cover for compressing or unclamping pedestal switch, along the base upper cover on the base upper cover
Periphery be equipped with a certain number of grooves, the periphery of pedestal switch is equipped with compatible with the hinged groove in base body logical
Slot is formed with the limiting section for stopping foot tube to be closed up upwards between two adjacent through slots, when groove and through slot and hingedly
Slot axially through when, foot tube is closed up to the groove of base upper cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128137.XA CN104869483B (en) | 2015-03-24 | 2015-03-24 | A kind of bracket that Quick extension locks automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128137.XA CN104869483B (en) | 2015-03-24 | 2015-03-24 | A kind of bracket that Quick extension locks automatically |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104869483A CN104869483A (en) | 2015-08-26 |
| CN104869483B true CN104869483B (en) | 2019-02-15 |
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ID=53914917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510128137.XA Active CN104869483B (en) | 2015-03-24 | 2015-03-24 | A kind of bracket that Quick extension locks automatically |
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| CN (1) | CN104869483B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB202214645D0 (en) * | 2022-10-05 | 2022-11-16 | Safehold Ltd | Tripod |
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|---|---|---|---|---|
| CN2769586Y (en) * | 2005-03-09 | 2006-04-05 | 郑新国 | Pipe capable of stepless expansion regulating |
| CN2914143Y (en) * | 2006-05-27 | 2007-06-20 | 吴清标 | Portable tripot |
| CN201555000U (en) * | 2009-10-10 | 2010-08-18 | 中山立信摄影器材有限公司 | Tripod |
| CN102638738A (en) * | 2012-04-06 | 2012-08-15 | 宁波柏人艾电子有限公司 | Microphone bracket |
| CN103239845A (en) * | 2013-05-08 | 2013-08-14 | 浙江水利水电专科学校 | Folding portable badminton net rack |
| CN204761631U (en) * | 2015-03-24 | 2015-11-11 | 宁波江北鑫祥音响电子有限公司 | Quick support that extends automatic locking |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101607086B1 (en) * | 2012-06-29 | 2016-03-30 | 주식회사 만도 | Electric mechanical brake system |
-
2015
- 2015-03-24 CN CN201510128137.XA patent/CN104869483B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2769586Y (en) * | 2005-03-09 | 2006-04-05 | 郑新国 | Pipe capable of stepless expansion regulating |
| CN2914143Y (en) * | 2006-05-27 | 2007-06-20 | 吴清标 | Portable tripot |
| CN201555000U (en) * | 2009-10-10 | 2010-08-18 | 中山立信摄影器材有限公司 | Tripod |
| CN102638738A (en) * | 2012-04-06 | 2012-08-15 | 宁波柏人艾电子有限公司 | Microphone bracket |
| CN103239845A (en) * | 2013-05-08 | 2013-08-14 | 浙江水利水电专科学校 | Folding portable badminton net rack |
| CN204761631U (en) * | 2015-03-24 | 2015-11-11 | 宁波江北鑫祥音响电子有限公司 | Quick support that extends automatic locking |
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| CN104869483A (en) | 2015-08-26 |
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Effective date of registration: 20200110 Address after: 315000 Jingpu An Village, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Patentee after: Ningbo Wanchen Audio Electronic Technology Co., Ltd. Address before: 315038 Zhejiang Province, Ningbo Jiangbei District Hongtang Qiu City Industrial Zone Patentee before: The north of the Changjiang River, Ningbo Xin Xiang acoustic electronic Co., Ltd |