CN104120939B - Regression buffering structure - Google Patents
Regression buffering structure Download PDFInfo
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- CN104120939B CN104120939B CN201310149570.2A CN201310149570A CN104120939B CN 104120939 B CN104120939 B CN 104120939B CN 201310149570 A CN201310149570 A CN 201310149570A CN 104120939 B CN104120939 B CN 104120939B
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- hollow outer
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Abstract
The invention discloses a regression buffering structure which comprises a shell body mechanism, a sliding mechanism, a stirring piece, an elastic piece and a buffering mechanism. The sliding mechanism is arranged in the shell body mechanism in a sliding mode. The stirring piece is provided with a stirring part which abuts against the sliding mechanism in a separable mode in a clamping mode. The elastic piece is arranged in the shell body mechanism. The buffering mechanism is arranged in the shell body mechanism. The buffering mechanism comprises a hollow outer pipe, a first pushing rod and a second pushing rod. One end of the first pushing rod is arranged in the hollow outer pipe in a sliding-sleeved mode from a first end. One end of the second pushing rod is arranged in the hollow outer pipe in a sliding-sleeved mode from a second end. The buffering mechanism comprises the hollow outer pipe and the two pushing rods, compared with a commonly-used oil pressure damping device of a regression buffering device, a longer buffering stroke is provided so that the time of buffering damping effect can be prolonged, and then the effects of effective buffering improving and noise lowering can be achieved.
Description
Technical field
The present invention relates to a kind of return buffer structure, espespecially one kind can extend the time of buffer damping effect, and then can have
Effect Promoting Layered Buffer and the recurrence buffer structure reducing noise.
Background technology
General regression buffer device, refers to shown in Fig. 1, its include an oleopneumatic dampening device 10, a shell 11 with
One slip fastener assembly 12, wherein this oleopneumatic dampening device 10 have an oil pressure bucket 101 and a piston rod 102, this piston rod 102
One end is slidably arranged in this oil pressure bucket 101, and this shell 11 coats this oleopneumatic dampening device 10 and makes this oil pressure hinder
Buddhist nun's device 10 is fixed in this shell 11, and this shell 11 is formed with a track 111, and this shell 11 is available for door body phase admittedly
If this slip fastener assembly 12 is mutually fixed with this piston rod 102 other end, and this slip fastener assembly 12 is provided with a fastener
121, this fastener 121 is formed with a buckle slot 122, this buckle slot 122 is available for being combined with the clipping block of doorframe and fastens；Its
Using when closing this door body, the buckle slot 122 of this its fastener 121 of slip fastener assembly 12 can be with this doorframe for principle system
Clipping block combines, and this slip fastener assembly 12 can be made at the clipping block of doorframe by stop, and now this door body may continue to
Move and drive this shell 11 and oil pressure bucket 101 to continue to move towards near doorframe direction, and make this piston rod 102 can this oil of retraction
Pressure bucket 101, in order to can produce a resistance to slow down shocks power when this door body and door frame contact, and then can reach and reduce at closing time
Produce the purpose of audible noise.
This regression buffer device commonly used, though can reach reduce the purpose producing audible noise at closing time, precisely because only possessing
The stroke that single oleopneumatic dampening device 10, therefore this piston rod 102 can slide in oil pressure bucket 101 is generally shorter, leads to live
Stopper rod 102 soon may just collide the interior wall of this oil pressure bucket 101 in this oil pressure bucket 101 of retraction, in turn result in and commonly use back
Return its buffering effect of buffer unit and reduction noise result all relatively limited, be event, how to be improved, that is, for above-mentioned disappearance
The technical difficulties being intended to solve by inventor are located.
Content of the invention
In view of existing regression buffer device, because only possessing single oleopneumatic dampening device, cause cushion stroke shorter,
Cause buffering effect and reduction noise result all relatively limited, the purpose of the therefore present invention is to provide a kind of recurrence buffer structure,
Buffer gear by the present invention is made up of a hollow outer tube and two pull bars, and can relatively commonly use the oil pressure of regression buffer device
Damping unit provides longer cushion stroke, in order to the time that can extend buffer damping effect, and then so that the present invention is can reach effectively
The effect of Promoting Layered Buffer and minimizing noise.
For solving above-mentioned technical problem, the present invention provides a kind of recurrence buffer structure, and it comprises:One casing mechanism, this shell
Body mechanism includes a shell body and a lid, and this shell body is provided with an accommodation space, and this lid is fixedly arranged on this shell body one end
Accommodation space in, this lid is provided with a groove, and this groove side is provided with a notch part；
One slide mechanism, this slide mechanism system is slidably disposed between this lid and its accommodation space of shell body, should
A follower and a relieving mechanism is included, wherein this relieving mechanism and this follower is coupled in slide mechanism；
One plectrum, this plectrum and this casing mechanism phase overlap, and this plectrum is provided with a clicking section, this clicking section and this groove phase
Wear, and this clicking section system is separably fastened with its relieving mechanism phase of this slide mechanism；
One elastic component, this elastic component is arranged in its accommodation space of this casing mechanism, this elastic component two ends respectively with housing
Mechanism and slide mechanism phase are fixed；
One buffer gear, this buffer gear is arranged in its accommodation space of this casing mechanism, and this buffer gear is located at and is somebody's turn to do
Elastic component side, includes a hollow outer tube, one first push rod and one second push rod, wherein this hollow outer tube in this buffer gear
There is first end and second end of open shape, this first push rod one end system is slidably set in this hollow outer tube by first end
Interior, this second push rod one end system be slidably set in this hollow outer tube by the second end, and this first push rod other end system with
Casing mechanism phase is fixed, and this second push rod other end system is fixed with slide mechanism phase.
In a preferred embodiment of the present invention, wherein this first push rod one end and second push rod one end are equipped with a piston
Part.
In a preferred embodiment of the present invention, the centre position of wherein this hollow outer tube is still provided with a relief hole, should again
It is further provided with one first air throttle and one second air throttle in hollow outer tube, and this first air throttle is divided with the second air throttle system
Not Wei Yu this relief hole both sides.
In a preferred embodiment of the present invention, wherein in this buffer gear, still include one first side cover and one second side
Lid, this first side cover system is combined with the first end of hollow outer tube fixed, the second end phase of this second side cover system and hollow outer tube
In conjunction with fixed.
In a preferred embodiment of the present invention, wherein this follower is provided with an axis hole and a behaviour area.
In a preferred embodiment of the present invention, wherein this movable fauna is fan shape hole or is circular hole.
In a preferred embodiment of the present invention, wherein this relieving mechanism includes a card below this follower
Product and one is located at the release piece above this follower, and this clamping piece is respectively arranged at two ends with a joint portion and a drivening piece, should
The lower surface of release piece is respectively equipped with a combined portion corresponding with its joint portion of this clamping piece and rotating shaft with upper surface, should again
Release piece is provided with an open-work and an oblique notch portion, and its its joint portion of combined portion and clamping piece of this release piece fastens, this release
Its rotating shaft system of pawl stretches through and protrudes from its groove of this lid, but its drivening piece system of this clamping piece pass through its behaviour area of this follower and
Its open-work of release piece simultaneously stretches through and protrudes from its groove of this lid.
In a preferred embodiment of the present invention, wherein this notch part is provided with a throwing cambered surface.
The invention has the beneficial effects as follows：Buffer gear by the present invention is made up of a hollow outer tube and two pull bars,
And the oleopneumatic dampening device that can relatively commonly use regression buffer device provides longer cushion stroke, in order to can extend buffer damping effect it
Time, and then make the present invention can reach the effect of effective Promoting Layered Buffer and minimizing noise.
Brief description
Fig. 1 is the combination diagram of regression buffer device in prior art；
Fig. 2 is the decomposing schematic representation of the present invention；
Fig. 3 is the decomposing schematic representation of its buffer gear of the present invention；
Fig. 4 is the partial schematic diagram of its buffer gear of the present invention；
Fig. 5 is the combination diagram of the present invention；
Fig. 6 is the schematic diagram that the present invention is combined with door body and doorframe；
Fig. 7 is that its plectrum of the present invention pulls schematic diagram in slide mechanism and the action of buffer gear；
Fig. 8 be Fig. 6 action after schematic diagram；
Fig. 9 is that its plectrum of the present invention drives the action schematic diagram that slide mechanism rotates；
Figure 10 is that its slide mechanism of the present invention returns the action schematic diagram resetting.
In accompanying drawing, the mark of each part is as follows：10th, oleopneumatic dampening device；101st, oil pressure bucket；102nd, piston rod；11st, shell；
111st, track；12nd, slip fastener assembly；121st, fastener；122nd, buckle slot；3rd, casing mechanism；31st, shell body；311st, house
Space；32nd, lid；321st, groove；322nd, notch part；323rd, cambered surface；33rd, extension；331st, first by fixed part；34th, spiral shell
Hole；4th, slide mechanism；41st, follower；411st, second by fixed part；412nd, axis hole；413rd, behaviour area；42nd, relieving mechanism；
421st, clamping piece；422nd, release piece；423rd, joint portion；424th, drivening piece；425th, open-work；426th, combined portion；427th, rotating shaft；
428th, oblique notch portion；5th, plectrum；51st, screw；52nd, clicking section；6th, elastic component；61st, the first fixed part；62nd, the second fixed part；7、
Buffer gear；71st, hollow outer tube；711st, first end；712nd, the second end；713rd, the first air throttle；714th, the second air throttle；
715th, relief hole；72nd, the first push rod；721st, piston piece；722nd, the 3rd fixed part；73rd, the second push rod；731st, piston piece；732、
4th fixed part；74th, the first side cover；741st, the first perforation；75th, the second side cover；751st, the second perforation；81st, door body；82nd, door
Frame.
Specific embodiment
Below in conjunction with the accompanying drawings presently preferred embodiments of the present invention is described in detail, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, thus protection scope of the present invention is made apparent clearly defining.
Refer to shown in Fig. 2 and Fig. 5, system of the present invention provides a kind of recurrence buffer structure, and it comprises:One casing mechanism 3,
This casing mechanism 3 includes a shell body 31 and a lid 32, and wherein this shell body 31 is provided with an accommodation space 311, this lid
32 is in the accommodation space 311 be fixedly arranged on this shell body 31 one end, and this lid 32 is provided with a groove 321, and this groove 321 side sets
There is a notch part 322, this notch part 322 is provided with a throwing cambered surface 323, additionally, in the accommodation space 311 of this shell body 31 other end
An extension 33 can be installed with, this extension 33 has two first by fixed part 331, this first can be recessed by fixed part 331
Hole, or, in other feasible embodiments, this first also can be directly arranged on this shell body 31 by fixed part 331, and this shell this
Body 31 can be provided with least one screw 34, thereby, please also refer to shown in Fig. 6, so that this shell body 31 is available for and uses this
The article of invention such as door body 81 phase spiral shell consolidation is closed.
One slide mechanism 4, this slide mechanism 4 is to be slidably disposed in this lid 32 and its accommodation space of shell body 31
Between 311, in this slide mechanism 4, include a follower 41 and a relieving mechanism 42, wherein this relieving mechanism 42 with should be from
Motivation structure 41 is coupled, and thereby, so that this relieving mechanism 42 can rotate relative to this follower 41, this follower 41 is provided with one
Axis hole 412 and a behaviour area 413, this follower 41 side is provided with two second by fixed part 411, and this is second by fixed part
411 can be shrinkage pool, and in the present embodiment, this behaviour area 413 is for fan shape hole or is circular hole, and this relieving mechanism 42 includes
One is located at the clamping piece 421 of this follower 41 lower section and is located at release piece 422 above this follower 41, wherein this card
Product 421 is respectively arranged at two ends with a joint portion 423 and a drivening piece 424, and this joint portion 423 for projection or can be shrinkage pool, this band
Moving part 424 can be projection, and the lower surface of this release piece 422 and upper surface are respectively equipped with one and its joint portion 423 of this clamping piece 421
Corresponding combined portion 426 and rotating shaft 427, but this release piece 422 is provided with an open-work 425 and an oblique notch portion 428, this release
Its its joint portion 423 of combined portion 426 and clamping piece 421 of pawl 422 fastens, and this combined portion 426 for shrinkage pool or can be projection,
And its rotating shaft 427 of this release piece 422 is to stretch through to protrude from its groove 321 of this lid 32, and its drivening piece 424 of this clamping piece 421
System through its behaviour area 413 of this follower 41 and its open-work 425 of release piece 422 and stretches through and protrudes from this its groove of lid 32
321.
One plectrum 5, this plectrum 5 is mutually overlapped with this casing mechanism 3, and this plectrum 5 has at least one screw 51, thereby, please
Coordinate refering to shown in Fig. 6 again, so that this plectrum 5 is available for closing with the such as doorframe 82 phase spiral shell consolidation of the article using the present invention, this group again
Piece 5 is provided with a clicking section 52, and this clicking section 52 is mutually worn with its groove 321 of this casing mechanism 3, and this clicking section 52 is separable
Ground is mutually fastened with its oblique notch portion 428 of this slide mechanism 4, and separately this clicking section 52 can be strip column.
One elastic component 6, this elastic component 6 is arranged in its accommodation space 311 of this casing mechanism 3, and this elastic component 6 can be bullet
Spring, but this elastic component 6 two ends is respectively provided with one first fixed part 61 and one second fixed part 62, this first fixed part 61 and second
Fixed part 62 can be projection, wherein this first fixed part 61 and casing mechanism 3 its first be fixed togather by fixed part 331, should
Second fixed part 62 and slide mechanism 4 its second be fixed togather by fixed part 411.
One buffer gear 7, this buffer gear 7 is arranged in its accommodation space 311 of this casing mechanism 3, and this buffer gear 7
Positioned at this elastic component 6 side, please also refer to shown in Fig. 3, including a hollow outer tube 71, one first in this buffer gear 7
Push rod 72, one second push rod 73, one first side cover 74 and one second side cover 75, wherein this hollow outer tube 71 have the of open shape
One end 711 and the second end 712, this first push rod 72 is respectively arranged at two ends with a piston piece 721 and one the 3rd fixed part 722, and this
Two push rods 73 are respectively arranged at two ends with a piston piece 731 and one the 4th fixed part 732, and its piston piece 721 of this first push rod 72 is can
Slidably it is set in this hollow outer tube 71 by first end 711, its piston piece 731 of this second push rod 73 is slidably by second
End 712 is set in this hollow outer tube 71, and its 3rd fixed part 722 of this first push rod 72 is and its first quilt of casing mechanism 3
Fixed part 331 is fixed togather, its 4th fixed part 732 of this second push rod 73 be with slide mechanism 4 its second by fixed part 411
It is fixed togather, and the 3rd fixed part 722 and the 4th fixed part 732 can be projection, separately this first side cover 74 and the second side cover
75 combine with the first end 711 of hollow outer tube 71 and the second end 712 respectively fixed, this first side cover 74 be provided with one with this first
The first corresponding perforation 741 of the outside dimension of push rod 72, this second side cover 75 is provided with the outer diameter ruler of one and this second push rod 73
Very little corresponding second perforation 751, and its 3rd fixed part 722 of this first push rod 72 first bores a hole and 741 mutually wears and dash forward with this
Outside for this first side cover 74, its 4th fixed part 732 of this second push rod 73 also mutually wears and protrudes from this second perforation 751
Outside this second side cover 75, please also refer to shown in Fig. 4, in the present embodiment, the centre position of this hollow outer tube 71 is still provided with
One first air throttle 713 and one second air throttle 714 can be further provided with one relief hole 715, and this hollow outer tube 71, and should
First air throttle 713 and the second air throttle 714 are the both sides being located at this relief hole 715 respectively, and this first air throttle 713 and the
The detail structure of two air throttles 714 is prior art and non-this case technical characteristic, repeats no more in this.
Referring again to shown in Fig. 2 and Fig. 6, in order to after user will be assembled with doorframe 82 using the door body 81 of the present invention,
When user pulls this door body 81 to carry out door opening action, this door body 81 will drive this casing mechanism 3 mobile, because of stirring of plectrum 5
Portion 52 is that its oblique notch portion 428 mutually fastens with slide mechanism 4, please also refer to shown in Fig. 7, therefore this casing mechanism 3 can and this
Slide mechanism 4 and plectrum 5 produce relative motion, and make this plectrum 5 can drive this slide mechanism 4 in its groove 321 of casing mechanism 3
Middle slide displacement, simultaneously this slide mechanism 4 also can stretch this elastic component 6 and buffer gear 7, referring again to shown in Fig. 8, when this is released
When the position of its drivening piece 424 of laying mechanism 42 is corresponding with the position of its notch part 322 of casing mechanism 3, because of its clicking section of plectrum 5
52 is the inclined-plane force to oblique notch portion 428, and the vectorial decomposition principle according to power understands, the active force of this clicking section 52 can be simultaneously right
Tiltedly notch portion 428 produces the component of two axial directions of X, Y, and makes the clicking section 52 of this plectrum 5 can drive its release of relieving mechanism 42
Pawl 422 is with rotating shaft 427 as axis rotation, so that this drivening piece 424 can fall into its notch part 322 of this casing mechanism 3, this group simultaneously
Its clicking section 52 of piece 5 then can be separated with this oblique notch portion 428, and now user can pull on door body 81 and carries out door opening action,
Meanwhile, fall into its notch part 322 of this casing mechanism 3 by this drivening piece 424, the reverse elastic force of this elastic component 6 generation can make this
Drivening piece 424 fastens this notch part 322, and makes this elastic component 6 can continue to keep extended state, now, this buffer gear 7 its
One pull bar 72 can this hollow outer tube 71 relative be in also extended state with the second pull bar 73.
Please also refer to shown in Fig. 6 and Fig. 9, when user pull this door body 81 carry out closing the door action when, this casing mechanism 3
I.e. can towards with contrary direction sliding transfer when opening the door, and make this plectrum 5 clicking section 52 can support again this slide mechanism 4 its
Tiltedly notch portion 428, otherwise and can according to aforementioned phase motion flow, so that its clicking section 52 of this plectrum 5 is guided and drive this release piece 422
Rotate, so that this drivening piece 424 can depart from its notch part 322 of this casing mechanism 3, please also refer to shown in Figure 10, now should
Elastic component 6 can discharge its reverse elastic force, and makes this elastic component 6 that casing mechanism 3 this plectrum 5 relatively and slide mechanism 4 can be driven sliding
Move displacement, namely elastic component 6 can drive door body 81 automatic returning to reset, meanwhile, its first pull bar 72 and second of this buffer gear 7
Pull bar 73 also can reset and retract in this hollow outer tube 71, and can reach buffering effect to reduce audible noise, and then makes this
The bright purpose that can reach automatic returning buffering.
Refer to shown in Fig. 3, the buffer gear 7 by the present invention is to be made up of a hollow outer tube 71 and two pull bars, and
The oleopneumatic dampening device 10 that regression buffer device can relatively be commonly used provides longer cushion stroke, in order to can extend buffer damping effect it
Time, and then make the present invention can reach the effect of effective Promoting Layered Buffer and minimizing noise；Additionally, referring again to shown in Fig. 4, and mat
This first air throttle 713, the second air throttle 714 and relief hole 715 are provided with by this hollow outer tube 71, in order to each section can be adjusted on demand
Air valve and the pore size of relief hole 715, and the speed of adjustable pressure release exhaust or capacity, in order to can finely tune this buffering on demand
The buffer damping size of mechanism 7, and then the effect of make the present invention can have improving product practicality concurrently.
The foregoing is only embodiments of the invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of buffer structure that returns is it is characterised in that comprise:One casing mechanism, this casing mechanism include a shell body with
One lid, this shell body is provided with an accommodation space, and this lid is fixedly arranged in the accommodation space of this shell body one end, and this lid is provided with
One groove, this groove side is provided with a notch part；
One slide mechanism, this slide mechanism system is slidably disposed between this lid and its accommodation space of shell body, this slip
A follower and a relieving mechanism is included, wherein this relieving mechanism and this follower is coupled in mechanism；
One plectrum, this plectrum is overlapped with this casing mechanism phase, and this plectrum is provided with a clicking section, and this clicking section is worn with this groove phase
If, and this clicking section is separably to fasten with its relieving mechanism phase of this slide mechanism；
One elastic component, this elastic component is arranged in its accommodation space of this casing mechanism, this elastic component two ends respectively with casing mechanism
And slide mechanism phase fixes；
One buffer gear, this buffer gear is arranged in its accommodation space of this casing mechanism, and this buffer gear is located at this elasticity
Part side, includes a hollow outer tube, one first push rod and one second push rod in this buffer gear, wherein this hollow outer tube has
The first end of open shape and the second end, this first push rod one end system is slidably set in this hollow outer tube by first end, should
Second push rod one end system is slidably set in this hollow outer tube by the second end, and this first push rod other end system and housing machine
Structure phase is fixed, and this second push rod other end system is fixed with slide mechanism phase, and this first push rod one end and second push rod one end are all provided with
There is a piston piece；
The centre position of this hollow outer tube is still provided with a relief hole, but be further provided with this hollow outer tube one first air throttle with
One second air throttle, and this first air throttle and the second air throttle system are located at the both sides of this relief hole respectively；In this buffer gear
Still include one first side cover and one second side cover, this first side cover system combines fixed with the first end of hollow outer tube, and this
Two side cover systems combine fixed with the second end of hollow outer tube.
2. the recurrence buffer structure according to claim 1 it is characterised in that：This follower is provided with an axis hole and and lives
Dynamic area.
3. according to claim 2 recurrence buffer structure it is characterised in that：This movable fauna is fan shape hole or is circular arc
Hole.
4. the recurrence buffer structure according to claim 1 it is characterised in that：This relieving mechanism includes one, and be located at should be from
Clamping piece below motivation structure and one is located at the release piece above this follower, and this clamping piece is respectively arranged at two ends with a joint portion
With a drivening piece, it is corresponding with its joint portion of this clamping piece combined that the lower surface of this release piece and upper surface are respectively equipped with one
Portion and rotating shaft, but this release piece is provided with an open-work and an oblique notch portion, its combined portion of this release piece and its joint portion of clamping piece
Fasten, its rotating shaft system of this release piece stretches through and protrudes from its groove of this lid, and its drivening piece system of this clamping piece passes through this driven
Its behaviour area of mechanism and its open-work of release piece simultaneously stretch through and protrude from its groove of this lid.
5. the recurrence buffer structure according to claim 1 it is characterised in that：This notch part is provided with a throwing cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149570.2A CN104120939B (en) | 2013-04-26 | 2013-04-26 | Regression buffering structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310149570.2A CN104120939B (en) | 2013-04-26 | 2013-04-26 | Regression buffering structure |
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| Publication Number | Publication Date |
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| CN104120939A CN104120939A (en) | 2014-10-29 |
| CN104120939B true CN104120939B (en) | 2017-02-08 |
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| CN201310149570.2A Active CN104120939B (en) | 2013-04-26 | 2013-04-26 | Regression buffering structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104612514B (en) * | 2015-01-22 | 2017-04-05 | 宁波合力伟业消防科技有限公司 | A kind of window opener that can be manually opened and smoke evacuation system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203188764U (en) * | 2013-04-26 | 2013-09-11 | 苏州升德精密电气有限公司 | Return buffer structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2748699Y (en) * | 2004-11-18 | 2005-12-28 | 应端忠 | Two-way gas spring |
| TWM378270U (en) * | 2009-11-18 | 2010-04-11 | dun-sheng Zhan | Semi-automatic door closing damping device |
| CN102410301A (en) * | 2010-09-24 | 2012-04-11 | 富泰华工业（深圳）有限公司 | Connecting mechanism and electronic device using same |
| TWM448202U (en) * | 2012-03-09 | 2013-03-11 | Shern Dar Ind Corp | Recovering buffer device |
| CN102587770B (en) * | 2012-03-09 | 2015-01-07 | 苏州升德精密电气有限公司 | Return buffering device |
| CN102840262A (en) * | 2012-09-24 | 2012-12-26 | 苏州升德精密电气有限公司 | Buffering rod structure improvement |
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2013
- 2013-04-26 CN CN201310149570.2A patent/CN104120939B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203188764U (en) * | 2013-04-26 | 2013-09-11 | 苏州升德精密电气有限公司 | Return buffer structure |
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