CN109441272A - A kind of hinge - Google Patents
A kind of hinge Download PDFInfo
- Publication number
- CN109441272A CN109441272A CN201811638322.3A CN201811638322A CN109441272A CN 109441272 A CN109441272 A CN 109441272A CN 201811638322 A CN201811638322 A CN 201811638322A CN 109441272 A CN109441272 A CN 109441272A
- Authority
- CN
- China
- Prior art keywords
- hinge
- page
- inner shaft
- axis connection
- tube
- 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
- 230000006835 compression Effects 0.000 claims abstract description 35
- 238000007906 compression Methods 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 35
- 238000003825 pressing Methods 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 11
- 239000006071 cream Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 7
- 238000004146 energy storage Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 48
- 239000010720 hydraulic oil Substances 0.000 description 12
- 230000008901 benefit Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
- E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
- E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
- E05F1/12—Mechanisms in the shape of hinges or pivots, operated by springs
- E05F1/1207—Mechanisms in the shape of hinges or pivots, operated by springs with a coil spring parallel with the pivot axis
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D11/00—Additional features or accessories of hinges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D3/00—Hinges with pins
- E05D3/02—Hinges with pins with one pin
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D5/00—Construction of single parts, e.g. the parts for attachment
- E05D5/02—Parts for attachment, e.g. flaps
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D5/00—Construction of single parts, e.g. the parts for attachment
- E05D5/10—Pins, sockets or sleeves; Removable pins
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D5/00—Construction of single parts, e.g. the parts for attachment
- E05D5/10—Pins, sockets or sleeves; Removable pins
- E05D5/14—Construction of sockets or sleeves
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D7/00—Hinges or pivots of special construction
- E05D7/02—Hinges or pivots of special construction for use on the right-hand as well as the left-hand side; Convertible right-hand or left-hand hinges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
- E05F3/12—Special devices controlling the circulation of the liquid, e.g. valve arrangement
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/20—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices in hinges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F5/00—Braking devices, e.g. checks; Stops; Buffers
- E05F5/06—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
- E05F5/10—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops with piston brakes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D5/00—Construction of single parts, e.g. the parts for attachment
- E05D5/10—Pins, sockets or sleeves; Removable pins
- E05D2005/102—Pins
Abstract
The present invention provides a kind of hinge, it include: recessed page, convex page, inner shaft, axis connection set, drive sleeve, spiral groove sleeve, compression spring, recessed page and convex page are formed hingedly by axis connection set and spiral groove sleeve, recessed page includes recessed page hinge, the upper end tube being connected with recessed page hinge top edge and the lower end tube being connected with recessed page hinge lower edge, convex page includes convex page hinge and the convex page tube that is connected with convex page hinge edge, the inner cavity of the upper end tube of recessed page is protruded on the top of axis connection set, the inner cavity of convex page tube is protruded into the lower part of axis connection set, the fixed inner cavity for being inlaid in upper end tube of drive sleeve, the mode of present invention compression spring provides energy storage, hinge can be made to be installed regardless of left and right, structure is simple, and due to being using convex page tube body as bearing part, spring pressure will not transmit And distortion damages recessed page, by being used for a long time, recessed hinge is also not susceptible to bending deformation.
Description
Technical field
The present invention relates to door and window hardware accessory field more particularly to hinges.
Background technique
Based on self-closing door hinge currently on the market is mainly resetted with torque spring, torque spring resetting hinge actually makes
Easily broken with the high torsional spring foot of process wire strength, the low wire rod of intensity is easy relaxation, causes from pass failure, even more advanced hinge
In using compression spring, but also due to spring pressure is excessive so that recessed page occurs bending and deformation.
Summary of the invention
The embodiment of the invention provides a kind of hinges to be stored up using technical solution provided in this embodiment using compression spring
Energy and helicla flute resetting structure can install hinge regardless of left and right directions, structurally reasonable, easy to use, for ease of maintenaince replace,
And by being used for a long time, recessed hinge is also not susceptible to bending deformation, is able to satisfy the needs of modern society's life.
The purpose of the embodiment of the present invention is that be achieved through the following technical solutions:
A kind of hinge is provided, comprising: recessed page, convex page, inner shaft, axis connection set, drive sleeve, spiral groove sleeve, compression spring, recessed page with
Convex page is formed hingedly by axis connection set and spiral groove sleeve, and recessed page includes recessed page hinge, is connected with recessed page hinge top edge
The upper end tube connect and the lower end tube being connected with recessed page hinge lower edge, convex page include convex page hinge and
The inner cavity of the upper end tube of recessed page, axis are protruded into the convex page tube being connected with convex page hinge edge, the top of axis connection set
The inner cavity of convex page tube, the fixed inner cavity for being inlaid in upper end tube of drive sleeve, and drive sleeve position are protruded into the lower part of connector sleeve
In the top of axis connection set, the inner cavity of convex page tube is protruded on the top of spiral groove sleeve, and recessed page is protruded into the lower part of spiral groove sleeve
The inner cavity of lower end tube, inner hole that the upper end of inner shaft is covered by axis connection are simultaneously inserted into drive sleeve, and inner shaft is formed with drive sleeve
The fit structure for being in axial sliding connection and rotating synchronously, the middle section axle body of inner shaft are provided with the limiting section for protruding from axle body, limit
The axle body of the inner shaft between the lower section of axis connection set in portion is set with compression spring, and the wall body of spiral groove sleeve axisymmetrically opens up
There are two helicla flutes, the lower part axle body of inner shaft is provided with the drive shaft for protruding from axle body, and the lower part axle body of inner shaft is inserted into helicla flute
The both ends of the inner hole of set, drive shaft are protruded into helicla flute, and lift is in the relative rotation direction of inner shaft when helicla flute is opened using hinge；
Wherein, the mounting means of axis connection set and spiral groove sleeve are as follows: the lower part fixation of axis connection set is inlaid in convex page tube
Inner cavity, the fixed inner cavity for being inlaid in convex page tube in the top of spiral groove sleeve, the top of axis connection set and the activity of upper end tube
Connection, the lower part of spiral groove sleeve is flexibly connected with lower end tube.
Further, helicla flute includes and axis tilting section and perpendicular to the axis section.
Further, perpendicular to the axis section of setting is fluted.
Further, undergauge is arranged in the top of axis connection set, has between the top of axis connection set and the inner wall of upper end tube
First rolling bearing.
Further, undergauge is arranged in the lower part of spiral groove sleeve, has between the lower part of spiral groove sleeve and the inner wall of lower end tube
Second rolling bearing.
Further, there are the first wearing piece, convex page circle between the upper surface of convex page tube and the lower end surface of upper end tube
There is the second wearing piece between the lower end surface of tube body and the upper surface of lower end tube.
Further, plane bearing is provided between the lower end surface and compression spring 7 of axis connection set.
Further, the top of inner shaft is splined shaft, offers the spline of adaptation inside drive sleeve, inner shaft and drive sleeve it
Between be in axial sliding connection and rotate synchronously by the cooperation realization of splined shaft and spline.
Further, shaft of the drive shaft in helicla flute is set with more than one cylindrical sliding sleeve.
Further, the inner cavity of upper end tube is equipped with lifting opening mechanism.
Further, lifting opening mechanism includes lifting screw, support plate, is axially provided in cylinder of the inner shaft close to upper end
Screw thread hole, the bar portion for lifting screw are spirally connected the threaded hole, and support plate is provided with the hole passed through for the bar portion of the lifting screw
Hole, the aperture of hole are less than the head of screw lower end surface aperture of lifting screw, and support plate is placed on the upper surface of drive sleeve.
Further, the inner cavity of the convex page tube between the top in the lower section of axis connection set to spiral groove sleeve is provided with liquid
Press buffer gear.
Further, hydraulic buffering mechanism includes piston, and lower section to the top of spiral groove sleeve of axis connection set is arranged in piston
Between inner shaft axle body on, the space between lower section that the upper surface of piston is covered to axis connection is shoe cream room, the lower end of piston
Face to the space between the upper surface of spiral groove sleeve is compression oil pocket, and the lower end surface of compression spring is located at the upper of the upper surface of piston
Side.
Further, limiting section is located at the part of the top or limiting section of the upper surface of piston as piston.
Further, the first oil sealing is provided between axis connection set and inner shaft, the first oil sealing is embedded in axis connection set, or in inner shaft
Shaft is arranged oil seal groove and is embedded in oil sealing, and the second oil sealing is provided between spiral groove sleeve and inner shaft, and the second oil sealing is embedded in helicla flute
Set, or oil sealing is embedded in interior jack-post body setting oil seal groove.
Further, piston is the piston with unidirectional excessively oily function, has internal piston sealing ring in piston.
Further, hydraulic fluid flow rate control mechanism is set in inner shaft.
Further, the specific structure of hydraulic fluid flow rate control mechanism are as follows: opened up from the upper surface of inner shaft along axis in axle body
Duct, duct limitedly pass to the position under piston and on drive shaft, open up oil return hole and mistake on the axle body of inner shaft
Oilhole, oil return hole are communicated with duct, and oil-through hole is communicated with duct, and oil return hole is located at the lower end surface of piston upper surface and axis connection set
Between inner shaft axle body on, oil-through hole is on the inner shaft axle body between piston lower surface and the upper surface of spiral groove sleeve, in hole
Speed regulation spindle is placed in road from top to bottom, position of the spindle between oil return hole and oil-through hole is adjusted the speed and change is diametrically being presented
Diameter.
Further, it adjusts the speed and is provided with third oil sealing between the side of spindle and the inner wall in duct.
Further, the inner cavity of upper end tube is equipped with lifting opening mechanism, and lifting opening mechanism includes lifting screw, branch
Fagging, the inner wall in duct are provided with screw thread, and the bar portion for lifting screw is spirally connected duct, and support plate is provided with the bar portion for lifting screw
The hole passed through, the aperture of hole are less than the head of screw lower end surface aperture of lifting screw, and the support plate is placed in drive sleeve
On upper surface.
Further, the inner cavity lower part of lower end tube is provided with press opening mechanism, press opening mechanism includes pressure
Part and fixing piece, pressing piece are used to press inner shaft and bounce back, and fixing piece is used to pressing piece being fixed on desired position.
Further, fixing piece is the axial lower capping for being provided with threaded hole, and pressing piece is the press spiral shell filled with threaded hole spiral shell
Silk.
Further, the inner wall of lower capping is provided with circlip.
Further, the upper end of upper end tube is provided with upper capping.
Using technical solution of the present invention, energy storage is provided with the mode of compression spring, hinge can be made to carry out regardless of left and right
Installation, structure is simple, and due to being using convex page tube body as bearing part, spring pressure will not be transmitted and be distorted and damage
Recessed page, by being used for a long time, recessed hinge is also not susceptible to bending deformation, is easily installed maintenance.It can also be using cushion cylinder even
Cooperate hydraulic oil flow control mechanism to control closing velocity, facilitates installation with screw press inner shaft opening hinge.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of this hair Ming one embodiment；
Fig. 2 is the structural schematic diagram of the hinge closed state of Fig. 1 embodiment；
Fig. 3 is the perspective view of the explosion of Fig. 1 embodiment；
Fig. 4 is the schematic cross-sectional view of second embodiment of the invention；
Fig. 5 is the structural schematic diagram of the hinge closed state of Fig. 4 embodiment；
Fig. 6 is the schematic cross-sectional view of third embodiment of the invention；
Fig. 7 is the schematic cross-sectional view of four embodiment of the invention；
Fig. 8, Fig. 9 are that hydraulic oil when piston is up and down in four embodiment of the invention flows to schematic diagram；
Figure 10 and Figure 11 is in the present invention using the defect that may be generated when pressing opening mechanism for some special hinges
Schematic diagram；
Figure 12 is the structural schematic diagram of another embodiment of oil sealing position in the embodiment of the present invention；
Figure 13 is the structural schematic diagram of the hinge closed state of Figure 12.
In figure: 1, recessed page；101, recessed page hinge；102, upper end tube；103, lower end tube；2, convex page；201, convex
Page hinge；202, convex page tube；3, inner shaft；301, limiting section；302, drive shaft；3021, sliding sleeve；303, drive shaft is installed
Portion；304, splined shaft；4, axis connection set；401, plane bearing；5, drive sleeve；6, spiral groove sleeve；601, helicla flute；7, pressure
Spring；801, the first rolling bearing；802, the second rolling bearing；901, the first wearing piece；902, the second wearing piece； 1001,
Piston；1002, the first oil sealing；1003, the second oil sealing；1004, third oil sealing；1005, compression oil pocket；1006, shoe cream room；
1101, lower capping；1102, screw is pressed；1103, circlip；1104, upper capping；12, duct, 13, speed regulation spindle；14, oil return
Hole；15, oil-through hole；16, internal piston sealing ring；1701, screw is lifted；1702, support plate.
Specific embodiment
For the purpose of the present invention, technical solution and advantage is more clearly understood, hereinafter, referring to the drawings and the embodiments,
The present invention is described in more detail.Fig. 1 to Fig. 7 is please referred to be read.
Embodiment one:
Shown in referring to figs. 1 to Fig. 3,
There is provided a kind of hinge, comprising: recessed page 1, convex page 2, inner shaft 3, axis connection cover 4, drive sleeve 5, spiral groove sleeve 6, compression spring
7, recessed page 1 is formed hingedly with convex page 2 by axis connection set 4 and spiral groove sleeve 6, and recessed page 1 includes recessed page hinge 101 and recessed page
The upper end tube 102 and the lower end round tube being connected with recessed 101 lower edge of page hinge that 101 top edge of hinge is connected
Body 103, convex page 2 include convex page hinge 201 and the convex page tube 202 that is connected with convex 201 edge of page hinge, axis connection
The inner cavity of the upper end tube 102 of recessed page 1 is protruded on the top of set 4, and the interior of convex page tube 202 is protruded into the lower part of axis connection set 4
Chamber, the fixed inner cavity for being inlaid in upper end tube 102 of drive sleeve 5, and drive sleeve 5 is located at the top of axis connection set 4, spiral groove sleeve
The inner cavity of convex page tube 202 is protruded on 6 top, and the inner cavity of the lower end tube 103 of recessed page 1 is protruded into the lower part of spiral groove sleeve 6,
The upper end of inner shaft 3 passes through the inner hole of axis connection set 4 and is inserted into drive sleeve 5, and inner shaft 3 and drive sleeve 5 are formed and be in axial sliding connection
With the fit structure of synchronous rotation, the middle section axle body of inner shaft 3 is provided with the limiting section 301 for protruding from axle body, on limiting section 301
Axle body to the inner shaft 3 between the lower section of axis connection set 4 is set with compression spring 7, and the wall body of spiral groove sleeve 6 axisymmetrically offers
Two helicla flutes 601, the lower part axle body of inner shaft 3 are provided with the drive shaft 302 for protruding from axle body, the lower part axle body insertion of inner shaft 3
The inner hole of spiral groove sleeve 6, the both ends of drive shaft 302 are protruded into helicla flute 601, the phase of inner shaft 3 when helicla flute 601 is opened with hinge
It is lift to rotation direction；
Wherein, the mounting means of axis connection set 4 and spiral groove sleeve 6 are as follows: the lower part fixation of axis connection set 4 is inlaid in convex page tube
202 inner cavity, the fixed inner cavity for being inlaid in convex page tube 202 in the top of spiral groove sleeve 6, the top and upper end of axis connection set 4
Tube 102 is flexibly connected, and the lower part of spiral groove sleeve 6 is flexibly connected with lower end tube 103.
In the present embodiment, the use of limiting section be limit compression spring endface position, transmit compression spring energy storage and
Exoergic.The mode that drive shaft is arranged in inner shaft can be, and a through-hole is arranged in the lower end of inner shaft, and drive shaft is revealed across the through-hole
Both ends out.It is also possible to that two prominent cylinders, column axis and inner shaft axis perpendicular is arranged in inner shaft lower end.So-called convex page is
Refer to the visual expression of convex page hinge with a convex page tube overall structure, and recessed page refers in recessed page hinge and recessed page hinge
The upper end tube that portion edge is connected and the lower end tube being connected with recessed page hinge lower edge, three's overall structure
Visual expression, convex page and recessed page are worked in coordination in shape to be used.And the concrete shape of convex page hinge and recessed page hinge
It is needed and is determined according to door leaf or the doorframe connection installed.About " the opposite of inner shaft 3 turns when helicla flute 601 is opened with hinge
Dynamic direction is lift " further detailed explanation: when the left side is recessed page, when the right is convex page, recessed page, drive sleeve and inner shaft
It moves synchronously, convex page and axis connection set and spiral groove sleeve move synchronously.In this movement, the rotation side of helicla flute
To using the rotation direction of inner shaft as lift.It is convex page when changing the left side into, when the right is recessed page and same reason.
Using the technical program, practical application scene is as follows:
When there is external force opening hinge, the fixed spiral groove sleeve for being inlaid in convex page and fixed both the axis connection sets for being inlaid in convex page
It is rotated outward along axis, since both upper end and the inner hole of drive sleeve of inner shaft engage flexible socket, and drive sleeve and recessed page are solid
Fixed connection, therefore, the lower end of inner shaft rotates in the inner hole of spiral groove sleeve toward opposite direction, is inlaid in the drive shaft of inner shaft lower part
It is slid along helicla flute, so that inner shaft generates axis and moves upwards, compression spring retraction energy storage is pressed by limiting section,
When the external force of opening hinge disappears, it is also exactly drive shaft along spiral shell that compression spring, which releases stress, which pushes inner shaft to move downward,
Spin slot sliding, and helicla flute is connect with convex page fixing, therefore, so that convex page is closed automatically towards recessed page.
Using the technical program, due to being using convex page tube body as bearing part, spring pressure will not be transmitted and be distorted
Recessed page is damage, by being used for a long time, recessed hinge is also not susceptible to bending deformation, compression spring energy storage and helicla flute is utilized
Resetting structure can install hinge regardless of left and right directions, structurally reasonable, be able to satisfy the needs of modern society's life.
Further,
Helicla flute 601 include and axis tilting section and perpendicular to the axis section.Wherein, with axis tilting section for switching door
Fan, compression or relaxation pressure spring, and perpendicular to the axis section is to be used for, when drive shaft both ends are located at this section, hinge is in normal
Open state.
Further,
Perpendicular to the axis section of setting is fluted.The use of the groove is to play the function of door-inhale, surely when it engages with drive shaft
Determine door leaf.
Further,
Undergauge is arranged in the top of axis connection set 4, has the first rolling between the top of axis connection set 4 and the inner wall of upper end tube 102
Dynamic bearing 801.
Further,
Undergauge is arranged in the lower part of spiral groove sleeve 6, has the second rolling between the lower part of spiral groove sleeve 6 and the inner wall of lower end tube 103
Dynamic bearing 802.
Other than having the advantages that embodiment one, the effect of the first rolling bearing and the second rolling bearing is to make convex page hinge
Roll articulation is formed between recessed page hinge, so that hinge folding is more smooth, reduces abrasion.
Further,
There are the first wearing piece 901, convex page round tube between the upper surface of convex page tube 202 and the lower end surface of upper end tube 102
There is the second wearing piece 902 between the lower end surface of body 202 and the upper surface of lower end tube 103.First wearing piece and second wear-resisting
Part can be plane bearing.
Other than having the advantages that embodiment one, the effect of the first wearing piece and the second wearing piece is so that convex page tube
Abrasion is reduced between the upper end tube and lower end tube of recessed page, so that the folding of hinge is more smooth.
Further, plane bearing 401 is provided between the lower end surface and compression spring 7 of axis connection set 4.Plane bearing 401
Effect be so that axis connection set compression spring between reduce wear so that the folding of hinge is more smooth.
Further, the top of inner shaft 3 is splined shaft 304, and the spline of adaptation, inner shaft 3 and biography are offered inside drive sleeve 5
It is in axial sliding connection and rotates synchronously by the cooperation realization of splined shaft 304 and spline between dynamic set 5.In addition to embodiment
Outside one the advantages of, the cooperation of splined shaft and spline enables axis connection set more accurately to realize synchronous rotation and axial direction with inner shaft
It is slidably connected, and component processing also facilitates.
Further, shaft of the drive shaft 302 in helicla flute 601 is set with 1 or more cylindrical sliding sleeve.Make
Drive shaft 302 becomes rolling friction from sliding friction when helicla flute 601 is slided, and reduces abrasion.
Embodiment two:
As shown in Fig. 1 to Fig. 5, Figure 10 and Figure 11,
The inner cavity of upper end tube 102 is equipped with lifting opening mechanism.
Lifting opening mechanism includes lifting screw 1701, support plate 1702, is axially arranged in cylinder of the inner shaft 3 close to upper end
There is a screw thread hole, the bar portion of lifting screw 1701 is spirally connected threaded hole, and support plate 1702 is provided with wears for the bar portion for lifting screw 1701
The hole crossed, the aperture of hole are less than the head of screw lower end surface aperture of lifting screw, and support plate 1702 is placed in the upper of drive sleeve 5
On end face.
Using lifting opening mechanism, not by the intensity effect of recessed page hinge, the power of opening hinge can only be transmitted in tube body,
Recessed page will not the bending deformation because of the pressure by spring, as shown in figure 11, it is this be prevent fires window hinge recessed page shape, should
Recessed page hinge deviates body central, and rigidity is insufficient, so more preferable with lifting opening mechanism effect.
When installation, user rotates lifting screw with adaptive tool, so that the end face of lifting screw and the screw thread phase spiral shell of inner shaft
It connects, so that inner shaft moves up, drive shaft slides along helicla flute, so that convex page outward movment opposite with the tube body position of recessed page,
Convex page and recessed page are opened along axis, at this point, user can install and not have to two hinge closures of worry, are being installed
Afterwards, lifting screw is rotated with adaptive tool opposite direction, takes out lifting screw, so that inner shaft declines, hinge can enter just
Normal use state.In the present embodiment, in addition to having the advantages of previous embodiment, the setting of opening mechanism is pressed so that user
Hinge can be very easily installed, go to continue to open hinge without separately applying energy.
In this embodiment, those skilled in the art, can be by above-mentioned zero according to knowledge technology in the field of grasp
Part changes other parts into.
Embodiment three:
As shown in Fig. 6,7,8,9, in the lower section to the convex page tube 202 between the top of spiral groove sleeve 6 of axis connection set 4
Chamber is provided with hydraulic buffering mechanism.In the present embodiment, other than having the advantages that embodiment one and some other improvement,
It can control the closing velocity of door leaf using hydraulic buffering mechanism, reduce shutdown noise.
Further, hydraulic fluid flow rate control mechanism is set in hinge.In addition to second-class with embodiment one and embodiment
Outside advantage, since the flow of hydraulic oil is controlled, the speed of shutdown can be more accurately adjusted.
Further, hydraulic buffering mechanism includes piston 1001, and the lower section of axis connection set 4 is arranged in helicla flute in piston 1001
On the axle body of inner shaft 3 between the top of set 6, upper surface to the space between the lower section of axis connection set 4 of piston 1001 is storage
Oil pocket 1006, lower end surface to the space between the upper surface of spiral groove sleeve 6 of piston 1001 are compression oil pocket 1005, compression spring
7 lower end surface is located at the top of the upper surface of piston 1001.
Further, limiting section 301, which is located at the top of the upper surface of piston 1001 or limiting section 301, becomes piston 1001
A part.
Further, the first oil sealing 1002 is provided between axis connection set 4 and inner shaft 3, the first oil sealing 1002 is embedded in axis connection
Set 4, or it is embedded in oil sealing 1002 in interior jack-post body setting oil seal groove, the second oil sealing is provided between spiral groove sleeve 6 and inner shaft 3
1003, the second oil sealing 1003 is embedded in spiral groove sleeve 6, or is embedded in oil sealing 1003 in interior jack-post body setting oil seal groove.Use oil sealing
It can prevent hydraulic oil from leaking.
Further, 4th oil sealing 1007 is set between 4 outer wall of connector sleeve and convex 202 inner wall of page tube body, in spiral groove sleeve 6
5th oil sealing 1008 is set between outer wall and convex 202 inner wall of page tube body, is also to prevent hydraulic oil from leaking.
Further, piston 1001 is the piston with unidirectional excessively oily function, has internal piston sealing ring 16 in piston 1001.
Practical application scene is as follows:
When there is external force opening hinge, the fixed spiral groove sleeve for being inlaid in convex page and fixed both the axis connection sets for being inlaid in convex page
It is rotated outward along axis, since both upper end and the inner hole of drive sleeve of inner shaft engage flexible socket, and drive sleeve and recessed page are solid
Fixed connection, therefore, the lower end of inner shaft rotates in the inner hole of spiral groove sleeve toward opposite direction, is inlaid in the drive shaft of inner shaft lower part
It is slid along helicla flute, so that inner shaft generates axis and moves upwards, compression spring retraction energy storage, hydraulic cushion machine is pressed by limiting section
The piston of structure also follows inner shaft to move up, and inner shaft pushes piston that the hydraulic oil in shoe cream room is made to flow to compression oil pocket.In Fig. 6
In it can be seen that, oily trend, when piston is the piston of unidirectional excessively oily function, inner shaft is upward, then internal piston sealing ring is downward
It is heavy, an oily access is then generated between piston and convex page tube, i.e., the hydraulic oil in shoe cream room can be made to pass through work
Access between plug and convex page tube flows to compression oil pocket, and also the hydraulic oil in some shoe cream room is flowed by oil return hole
Then duct flows to compression oil pocket by oil-through hole again.
When the external force of opening hinge disappears, it is also exactly drive shaft that compression spring, which releases stress, which pushes inner shaft to move downward,
It is slid along helicla flute, and helicla flute is connect with convex page fixing, therefore, so that convex page is closed automatically towards recessed page.Piston to
Lower movement can be seen, oily trend so that the hydraulic oil of compression oil pocket flows to shoe cream room in Fig. 7, when piston is unidirectional excessively oily
When the piston of function, inner shaft is downward, then internal piston sealing ring ramps up, and then generates between piston and convex page tube
The access of oil is closed, i.e., the hydraulic oil in compression oil pocket can be made to flow into duct by oil-through hole, then pass through oil return hole again
Flow to shoe cream room.To control the speed that inner shaft moves downward, realize that hydraulic cushion is closed.
Therefore, in the present embodiment, other than having the advantages that embodiment one, two, can control using hydraulic buffering mechanism
The closing velocity of door leaf reduces shutdown noise.
Example IV:
As shown in Figures 6 to 9,
Further, hydraulic fluid flow rate control mechanism is set in inner shaft 3.
Further, the specific structure of hydraulic fluid flow rate control mechanism are as follows: opened up from the upper surface of inner shaft 3 along axis in axle body
Duct 12, duct 12 limitedly pass to the position under piston 1001 and on drive shaft 302, open on the axle body of inner shaft 3
If oil return hole 14 and oil-through hole 15, oil return hole 14 are communicated with duct 12, oil-through hole 15 is communicated with duct 12, and oil return hole 14, which is located at, lives
Fill in 1001 upper surfaces and axis connection set 4 lower end surface between 3 axle body of inner shaft on, oil-through hole 15 be located at 1001 lower end surface of piston and
On 3 axle body of inner shaft between the upper surface of spiral groove sleeve 6, places speed regulation spindle 13 from top to bottom in duct, adjust the speed spindle 13
Position between oil return hole 14 and oil-through hole 15 is for example upper coarse and lower fine etc. in diametrically presentation variable diameter.
In the present embodiment, it due to having used speed regulation spindle, can be learnt in conjunction with the embodiments two, speed regulation spindle is more accurate
Ground controls the The hydraulic oil flowed in duct.As shown, since the region of interest of speed regulation spindle is that thickness is presented
Different feature, when adjusting the depth in speed regulation spindle access aperture road from top, it can change is flowed hydraulic in duct
Oil mass allows user to control the speed of hinge closure as needed, to control the closing speed of door leaf etc..It is excellent to adjust the speed spindle
Selection of land can choose taper.
Further, Fig. 4 can be referred from this embodiment, holds the inner cavity of tube 102 is mountable to have lifting opening mechanism,
Lifting opening mechanism includes lifting screw 1701, support plate 1702, and the inner wall in duct 12 is provided with screw thread, lifts screw 1701
Bar portion be spirally connected duct 12, support plate 1702 is provided with the hole passed through for the bar portion for lifting screw 1701, and the aperture of hole is less than
The head of screw lower end surface aperture of screw is lifted, support plate 1702 is placed on the upper surface of drive sleeve 5.
Using lifting opening mechanism, not by the intensity effect of recessed page hinge, the power of opening hinge can only be transmitted in tube body,
Recessed page will not the bending deformation because of the pressure by spring, as shown in figure 11, it is this be prevent fires window hinge recessed page shape, should
Recessed page hinge deviates body central, and rigidity is insufficient, so more preferable with lifting opening mechanism effect.
When installation, user rotates lifting screw with adaptive tool, so that the end face of lifting screw and 12 inner wall of inner shaft duct
Screw thread bolt so that inner shaft moves up, drive shaft slides along helicla flute, so that convex page is opposite with the tube body position of recessed page
Outward movment, convex page and recessed page are opened along axis, at this point, user can install and not have to two hinge closures of worry,
After being installed, lifting screw is rotated with adaptive tool opposite direction, takes out lifting screw, so that inner shaft declines, hinge can
To enter normal use state.In the present embodiment, in addition to having the advantages of previous embodiment, the setting of opening mechanism is pressed
It enables a user to that hinge is very easily installed, goes to continue to open hinge without separately applying energy.
In this embodiment, those skilled in the art, can be by above-mentioned zero according to knowledge technology in the field of grasp
Part changes other parts into.
The screw thread of the duct inner wall can be used for speed regulation spindle, speed regulation spindle can also be spirally connected the screw thread rise or under
Drop.
Further, it adjusts the speed between the side of spindle 13 and the inner wall in duct 12 and is provided with third oil sealing 1004.Use oil sealing
It can prevent hydraulic oil from leaking
Further, the inner cavity lower part of lower end tube 103 is provided with press opening mechanism, press opening mechanism includes pressing piece
And fixing piece, pressing piece are used to press inner shaft 3 and bounce back, fixing piece is used to pressing piece being fixed on desired position.
Further, fixing piece is the axial lower capping 1101 for being provided with threaded hole, and pressing piece is the top filled with threaded hole spiral shell
Press screw 1102.
When installation, user rotates press screw with adaptive tool, so that the end face of press screw and the lower end surface of inner shaft are supported
It leans on, so that inner shaft moves up, drive shaft slides along helicla flute, so that convex page outward movment opposite with the tube body position of recessed page,
Convex page and recessed page are opened along axis, at this point, user can install and not have to two hinge closures of worry, are being installed
Afterwards, press screw is retracted, so that inner shaft lower end surface is not with press screw against hinge can enter normal use state
?.In the present embodiment, in addition to having the advantages of previous embodiment, the setting for pressing opening mechanism is enabled a user to very easily
Hinge is installed, goes to continue to open hinge without separately applying energy.
In this embodiment, those skilled in the art, can be by pressing piece according to knowledge technology in the field of grasp
Other parts are changed into fixing piece, are bounced back as long as pressing piece is used to press inner shaft, fixing piece is for pressing piece to be fixed on
Desired position.
Further, the inner wall of lower capping 1101 is provided with circlip 1103.The effect of circlip is to prevent press screw slippage.
Further, the upper end of upper end tube 102 is provided with upper capping 1104.Wherein, upper capping and lower capping
Using first is that beautification prevents dust accretions second is that protecting internal part.
It is provided for the embodiments of the invention a kind of hinge above to be described in detail, specific case used herein
Principle and implementation of the present invention are described, the above embodiments are only used to help understand core of the invention
Thought is thought；At the same time, for those skilled in the art in specific embodiment and applies model according to the thought of the present invention
Place that there will be changes, to sum up, the contents of this specification are not to be construed as limiting the invention.
Claims (24)
1. a kind of hinge characterized by comprising recessed page (1), convex page (2), inner shaft (3), axis connection set (4), drive sleeve (5),
Spiral groove sleeve (6), compression spring (7), the recessed page (1) and convex page (2) pass through the axis connection set (4) and the spiral groove sleeve
(6) formed hinged, the recessed page (1) includes recessed page hinge (101), is connected with recessed page hinge (101) top edge
Upper end tube (102) and the lower end tube (103) that is connected with recessed page hinge (101) lower edge, it is described
Convex page (2) includes convex page hinge (201) and the convex page tube (202) that is connected with convex page hinge (201) edge,
The inner cavity of the upper end tube (102) of the recessed page (1) is protruded on the top of the axis connection set (4), the axis connection set (4)
The inner cavity of the convex page tube (202) is protruded into lower part, and drive sleeve (5) fixation is inlaid in the upper end tube (102)
Inner cavity, and the drive sleeve (5) is located at the top of the axis connection set (4), and the top of the spiral groove sleeve (6) is protruded into described
The lower end tube (103) of the recessed page (1) is protruded into the inner cavity of convex page tube (202), the lower part of the spiral groove sleeve (6)
Inner cavity, the upper end of the inner shaft (3) pass through the inner hole of the axis connection set (4) and are inserted into the drive sleeve (5), the inner shaft
(3) fit structure for being in axial sliding connection and rotating synchronously, the middle section axle body of the inner shaft (3) are formed with the drive sleeve (5)
Be provided with the limiting section (301) for protruding from axle body, the limiting section (301) between the lower section of the axis connection set (4)
The axle body of inner shaft (3) be set with the compression spring (7), the wall body of the spiral groove sleeve (6) axisymmetrically offers two spiral shells
Spin slot (601), the lower part axle body of the inner shaft (3) are provided with the drive shaft (302) for protruding from axle body, under the inner shaft (3)
Portion's axle body is inserted into the inner hole of the spiral groove sleeve (6), and the both ends of the drive shaft (302) are protruded into the helicla flute (601), institute
The relative rotation direction of inner shaft (3) when helicla flute (601) is opened using hinge is stated as lift；
Wherein, the mounting means of the axis connection set (4) and the spiral groove sleeve (6) are as follows: the lower part of the axis connection set (4) is solid
Surely it is inlaid in the inner cavity of the convex page tube (202), the top fixation of the spiral groove sleeve (6) is inlaid in the convex page round tube
The inner cavity of body (202), the top of the axis connection set (4) are flexibly connected with the upper end tube (102), the spiral groove sleeve
(6) lower part is flexibly connected with the lower end tube (103).
2. a kind of hinge as described in claim 1, which is characterized in that the helicla flute (601) include with axis tilting section with
And perpendicular to the axis section.
3. a kind of hinge as claimed in claim 2, which is characterized in that the perpendicular to the axis section of setting is fluted.
4. a kind of hinge as described in claim 1, which is characterized in that undergauge is arranged in the top of the axis connection set (4), described
There are the first rolling bearing (801) between the top of axis connection set (4) and the inner wall of the upper end tube (102).
5. a kind of hinge as claimed in claim 4, which is characterized in that undergauge is arranged in the lower part of the spiral groove sleeve (6), described
There are the second rolling bearing (802) between the lower part of spiral groove sleeve (6) and the inner wall of the lower end tube (103).
6. a kind of hinge as described in claim 1,2,3,4,5 is any, which is characterized in that the convex page tube (202)
Have between upper surface and the lower end surface of the upper end tube (102) the first wearing piece (901), the convex page tube (202)
Lower end surface and the lower end tube (103) upper surface between have the second wearing piece (902).
7. a kind of hinge as described in claim 1,2,3,4,5 is any, which is characterized in that the lower end of the axis connection set (4)
Plane bearing (401) are provided between face and the compression spring (7).
8. a kind of hinge as described in claim 1,2,3,4,5 is any, which is characterized in that the top of the inner shaft (3) is flower
Key axis (304), the internal spline for offering adaptation of the drive sleeve (5), between the inner shaft (3) and the drive sleeve (5)
It is in axial sliding connection and rotates synchronously by the cooperation realization of the splined shaft (304) and the spline.
9. a kind of hinge as described in claim 1,2,3,4,5 is any, which is characterized in that the drive shaft (302) is described
Shaft in helicla flute (601) is set with more than one cylindrical sliding sleeve.
10. a kind of hinge as described in claim 1,2,3,4,5 is any, which is characterized in that the upper end tube (102)
Inner cavity is equipped with lifting opening mechanism.
11. a kind of hinge as claimed in claim 10, which is characterized in that the lifting opening mechanism includes lifting screw
(1701), support plate (1702), in the inner shaft (3), the cylinder close to upper end is axially provided with screw thread hole, the lifting spiral shell
The bar portion of nail (1701) is spirally connected the threaded hole, and the support plate (1702) is provided with the bar portion for lifting screw (1701) and wears
The hole crossed, the aperture of described hole are less than the head of screw lower end surface aperture of the lifting screw, and the support plate (1702) is put
It is placed on the upper surface of the drive sleeve (5).
12. a kind of hinge as described in claim 1,2,3,4,5 is any, which is characterized in that under the axis connection set (4)
Side to the inner cavity of the convex page tube (202) between the top of the spiral groove sleeve (6) is provided with hydraulic buffering mechanism.
13. a kind of hinge as claimed in claim 12, which is characterized in that the hydraulic buffering mechanism includes piston (1001),
The inner shaft (3) between the top in the lower section of the axis connection set (4) to the spiral groove sleeve (6) is arranged in the piston (1001)
Axle body on, upper surface to the space between the lower section of the axis connection set (4) of the piston (1001) is shoe cream room
(1006), the lower end surface of the piston (1001) to the space between the upper surface of the spiral groove sleeve (6) is compression oil pocket
(1005), the lower end surface of the compression spring (7) is located at the top of the upper surface of the piston (1001).
14. a kind of hinge as claimed in claim 13, which is characterized in that the limiting section (301) is located at the piston
(1001) top of upper surface or the limiting section (301) become a part of the piston (1001).
15. a kind of hinge as claimed in claim 13, which is characterized in that between the axis connection set (4) and the inner shaft (3)
It is provided with the first oil sealing (1002), first oil sealing (1002) is embedded in the axis connection set (4), or in the inner shaft (3) column
Body is arranged oil seal groove and is embedded in oil sealing, and the second oil sealing (1003), institute are provided between the spiral groove sleeve (6) and the inner shaft (3)
It states the second oil sealing (1003) and is embedded in the spiral groove sleeve (6), or be embedded in oil sealing in the inner shaft (3) shaft setting oil seal groove.
16. a kind of hinge as described in claim 13,14,15 is any, which is characterized in that the piston (1001) is with list
To the piston of excessively oily function, there are internal piston sealing ring (16) in the piston (1001).
17. a kind of hinge as described in claim 13,14,15 is any, which is characterized in that liquid is arranged in the inner shaft (3)
Pressure oil flow control mechanism.
18. a kind of hinge as claimed in claim 17, which is characterized in that the specific structure of the hydraulic fluid flow rate control mechanism
Are as follows: it is opened up duct (12) from the upper surface of the inner shaft (3) along axis in axle body, the duct (12) limitedly passes to the work
Under plug (1001) and the position on the drive shaft (302), opens up oil return hole (14) on the axle body of the inner shaft (3)
With oil-through hole (15), the oil return hole (14) communicates with the duct (12), the oil-through hole (15) and the duct (12) phase
It is logical, inner shaft of the oil return hole (14) between the piston (1001) upper surface and the lower end surface of the axis connection set (4)
(3) on axle body, the oil-through hole (15) is between the piston (1001) lower end surface and the upper surface of the spiral groove sleeve (6)
Inner shaft (3) axle body on, in the duct from top to bottom place speed regulation spindle (13), the speed regulation spindle (13) be located at described in
Variable diameter is diametrically being presented in position between oil return hole (14) and the oil-through hole (15).
19. a kind of hinge as claimed in claim 18, which is characterized in that the side and the duct of speed regulation spindle (13)
(12) third oil sealing (1004) are provided between inner wall.
20. a kind of hinge as described in claim 13,14,15,18,19 is any, which is characterized in that the upper end tube
(102) inner cavity is equipped with lifting opening mechanism, and the lifting opening mechanism includes lifting screw (1701), support plate
(1702), the inner wall in the duct (12) is provided with screw thread, and the bar portion of lifting screw (1701) is spirally connected the duct
(12), the support plate (1702) is provided with the hole passed through for the bar portion of lifting screw (1701), the aperture of described hole
Less than the head of screw lower end surface aperture of the lifting screw, the support plate (1702) is placed in the upper end of the drive sleeve (5)
On face.
21. a kind of hinge as described in claim 1,2,3,4,5,13,14,15,18,19 is any, which is characterized in that described
The inner cavity lower part of lower end tube (103) is provided with press opening mechanism, and the press opening mechanism includes pressing piece and fixation
Part, the pressing piece are used to press the inner shaft (3) and bounce back, and the fixing piece is required for the pressing piece to be fixed on
Position.
22. a kind of hinge as claimed in claim 21, which is characterized in that the fixing piece is axial is provided under threaded hole
It covers (1101), the pressing piece is the press screw (1102) filled with the threaded hole spiral shell.
23. a kind of hinge as claimed in claim 22, which is characterized in that the inner wall of the lower capping (1101) is provided with circlip
(1103).
24. a kind of hinge as described in claim 1,2,3,4,5,11,13,14,15,18,19,22,23 is any, feature exist
In being provided with upper capping (1104) in the upper end of the upper end tube (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638322.3A CN109441272B (en) | 2018-12-29 | Hinge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638322.3A CN109441272B (en) | 2018-12-29 | Hinge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109441272A true CN109441272A (en) | 2019-03-08 |
| CN109441272B CN109441272B (en) | 2024-05-03 |
Family
ID=
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116592045A (en) * | 2023-05-18 | 2023-08-15 | 河北普康医疗设备有限公司 | Hospital bed guardrail hinge mechanism |
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| CN108979387A (en) * | 2018-08-17 | 2018-12-11 | 肇庆市高要区兆高金属科技有限公司 | A kind of hinge of band lifting opening mechanism |
| CN209891936U (en) * | 2018-12-29 | 2020-01-03 | 肇庆市高要区兆高金属科技有限公司 | Hinge with elastic hinge |
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| US20050246860A1 (en) * | 2004-05-10 | 2005-11-10 | Tan-Cheng Huang | Door closer |
| CN101879966A (en) * | 2009-05-08 | 2010-11-10 | 屠旭峰 | Dry powder pump |
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| CN116592045B (en) * | 2023-05-18 | 2023-09-19 | 河北普康医疗设备有限公司 | Hospital bed guardrail hinge mechanism |
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Country or region after: China Address after: 526105 Jinhu Road, Jinli Town, Gaoyao District, Zhaoqing City, Guangdong Province (one of the plants in zhaogao Metal Technology Co., Ltd.) Applicant after: Guangdong zhaogao Metal Technology Co.,Ltd. Address before: 526100 No.2 factory building of jinlixin Central District, Gaoyao District, Zhaoqing City, Guangdong Province (No.1 Factory Building of Wu Zhaojian) Applicant before: ZHAOQING GAOYAO ZHAOGAO METAL TECHNOLOGY Co.,Ltd. Country or region before: China |