CN109000952B - Office chair overall performance detection device - Google Patents
Office chair overall performance detection device Download PDFInfo
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- CN109000952B CN109000952B CN201810943938.5A CN201810943938A CN109000952B CN 109000952 B CN109000952 B CN 109000952B CN 201810943938 A CN201810943938 A CN 201810943938A CN 109000952 B CN109000952 B CN 109000952B
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- 238000001514 detection method Methods 0.000 title claims abstract description 83
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000001125 extrusion Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 238000013519 translation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/001—Testing of furniture, e.g. seats or mattresses
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Abstract
The invention relates to the field of seat detection, in particular to an office seat overall performance detection device, which comprises a base, a rotary workbench, a side pressure detection device, a cushion pressure detection device and a back cushion pressure detection device, wherein the rotary workbench comprises a rotary disc for placing a seat, a driving assembly for driving the rotary disc to rotate and a plurality of workpiece clamps for fixing the seat, the side pressure detection device comprises two side pressure detection mechanical arms, the cushion pressure detection device comprises an installation frame and a seat pressure detection mechanical arm, the back cushion pressure detection device comprises a back cushion detection mechanical arm and a back support mechanical arm, and a plurality of indexes of the seat and the rotary seat are detected through the mutual matching work among the rotary workbench, the side pressure detection device, the cushion pressure detection device and the back cushion pressure detection device, the problem of among the prior art unable detection work to seat and rotatory seat is solved.
Description
Technical Field
The invention relates to the field of seat detection, in particular to a device for detecting the overall performance of an office seat.
Background
An office chair, english office chair, refers to various chairs that are equipped for convenience of work in daily work and social activities. Office chairs are classified into a narrow office chair and a generalized office chair by office partners, the narrow office chair refers to a backrest chair on which a person sits when working on a table top in a sitting posture, and the generalized office chair is all chairs used in offices and comprises a large office chair, a middle office chair, a passenger chair, a clerk chair, a conference chair, a visitor chair, a training chair and the like.
In the prior art, after the seat is produced, most of seat manufacturers market the seat without strict inspection, and because the manufacturers do not have proper detection equipment, the manufacturers cannot avoid defective products from being sold on the market, so that the office seat overall performance detection device is required to be designed.
Disclosure of Invention
The invention aims to provide a device for detecting the overall performance of an office seat, aiming at the defects of the prior art, which is used for detecting multiple indexes of the seat and a rotary seat through the mutual matching work among a rotary workbench, a side pressure detection device, a cushion pressure detection device and a back cushion pressure detection device, and solving the problem that the seat and the rotary seat cannot be detected in the prior art.
In order to solve the above problems, the present invention provides the following technical solutions: an office chair overall performance detection device comprises a base, a rotary workbench, a side pressure detection device, a cushion pressure detection device and a back cushion pressure detection device, wherein the rotary workbench comprises a rotary disc for placing a chair, a driving assembly for driving the rotary disc to rotate and a plurality of workpiece clamps for fixing the chair, the rotary disc is arranged at the top end of the base in a horizontal state, the driving assembly is arranged below the rotary disc, all the workpiece clamps are arranged at the top end of the rotary disc at equal intervals along the circumferential direction of the rotary disc, the side pressure detection device comprises two side pressure detection mechanical arms which are respectively arranged at one side of the rotary disc, the output ends of the two side pressure detection mechanical arms are oppositely arranged, the cushion pressure detection device comprises an installation frame and a seat pressure detection mechanical arm, the backrest pressure detection device comprises a backrest detection mechanical arm and a backrest support mechanical arm, the backrest support mechanical arm is fixedly arranged at the top end of the base, the backrest support mechanical arm is located at the rear side of the base, the backrest detection mechanical arm is horizontally arranged at the upper section of the mounting frame, and the output end of the backrest detection mechanical arm extends towards the direction of the backrest support mechanical arm;
the mounting bracket is including two loop bars, two slide bars and two horizon bars, two loop bars are vertical state and install and be provided with the interval between two loop bars on the base and take on one's shoulder, and every slide bar inserts a loop bar respectively in, all be provided with the through-hole that is used for inserting the bolt on loop bar and the slide bar, the one end of every horizon bar is connected with the top of slide bar, and the other end level of horizon bar extends towards the top of rotatory disc, and the fixed plate is the top at two horizon bars at the horizontality installation.
Furthermore, two side pressure detection mechanical arm structures set up the same and all include lift slip table, pressurized cylinder and compact heap the lift slip table is vertical state and installs on the base, pressurized cylinder is horizontal state and installs on the slider of lift slip table and pressurized cylinder's output extends towards the direction of rotating the disc, compact heap fixed mounting love pressurized cylinder's output.
Furthermore, sit and press detection arm including pneumatic cylinder and clamp plate subassembly, the pneumatic cylinder is vertical state and installs on the fixed plate and the output of pneumatic cylinder passes the fixed plate and sets up downwards, clamp plate subassembly fixed mounting is at the output of pneumatic cylinder.
Furthermore, the pressing plate assembly comprises a fixing frame and two lower pressing plates, the fixing frame is of a U-shaped structure, the two lower pressing plates are fixedly installed on two extension sections of the fixing frame, and the middle position of the top end of the fixing frame is connected with the output end of the hydraulic cylinder.
Further, work piece holder is including mounting box, extrusion piece, two clamping bars and two reset spring, the mounting box is upper end open-ended rectangle box structure, and two clamping bars all are vertical state and insert the inside both sides of mounting box, and the middle section of clamping bar is articulated with the mounting box, two reset spring installs respectively in the outside of the hypomere of a clamping bar, and reset spring's opposite side and the mounting box wall connection of homonymy, the extrusion piece is the rectangle structure, and wherein two diagonal angles of extrusion piece still are provided with the excessive curved surface of circular arc, and the extrusion piece is located between two clamping bars of the inside of mounting box, and the intermediate position of extrusion piece still level passes a dwang, and the dwang passes the mounting box and rotatably is connected with the mounting box.
Further, drive assembly is including rotating electrical machines and rotation axis, and rotating electrical machines fixed mounting is in the bottom of base, and the top of rotation axis is connected with the bottom of rotating disc, and the bottom of rotation axis passes the base and extends downwards and rotation axis and base axle, and the bottom of rotation axis still is provided with from the driving wheel, and rotating electrical machines's output is provided with the action wheel, and the action wheel is connected through belt drive with following the driving wheel.
Has the advantages that: the invention aims to overcome the defects of the prior art, and provides an office seat overall performance detection device, which is used for detecting multiple indexes of a seat and a rotary seat through the mutual cooperation of a rotary workbench, a side pressure detection device, a cushion pressure detection device and a headrest pressure detection device.
Drawings
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a side view of the present invention;
FIG. 4 is a schematic perspective view of a back cushion detection robot arm according to the present invention;
FIG. 5 is an enlarged view taken at A of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic perspective view of the seating pressure detecting robot arm according to the present invention;
FIG. 7 is a schematic perspective view of the lateral pressure detecting robot arm according to the present invention;
FIG. 8 is a schematic perspective view of the back support arm of the present invention;
FIG. 9 is a schematic perspective view of a rotary table according to the present invention;
FIG. 10 is a cross-sectional view of a work holder of the present invention;
description of reference numerals:
a rotary table 1, a rotary disk 11, a driving assembly 12, a rotary motor 121, a driving wheel 122, a driven wheel 123, a rotary shaft 124, a workpiece clamp 13, a mounting box 131, an extrusion block 132, a clamping rod 133, a return spring 134,
a side pressure detecting device 2, a side pressure detecting mechanical arm 21, a lifting slide table 211, a pressurizing cylinder 212, a pressing block 213,
a cushion pressure detection device 3, a mounting frame 31, a loop bar 311, a slide bar 312, a horizontal bar 313, a through hole 314, a cushion pressure detection mechanical arm 32, a hydraulic cylinder 321, a fixing frame 322, a lower pressing plate 323,
the headrest pressure detection device 4, the headrest detection mechanical arm 41, the driving motor 411, the driving shaft 412, the cam 413, the ejector rod 414, the guide sleeve 415, the limit ring 416, the return spring 417, the backrest support mechanical arm 42, the translation sliding table 421, the first support 422, the abutting rod 423, the abutting plate 424 and the angle adjustment cylinder 425.
Detailed Description
The following detailed description of specific embodiments of the present invention is made with reference to the accompanying drawings and examples:
referring to fig. 1 to 10, the office chair overall performance detection device comprises a base, a rotary table 1, a side pressure detection device 2, a cushion pressure detection device 3 and a headrest pressure detection device 4, wherein the rotary table 1 comprises a rotary disc 11 for placing a seat, a driving assembly 12 for driving the rotary disc 11 to rotate and a plurality of work holders 13 for fixing the seat, the rotary disc 11 is horizontally arranged at the top end of the base, the driving assembly 12 is arranged below the rotary disc 11, all the work holders 13 are arranged at the top end of the rotary disc 11 at equal intervals along the circumferential direction of the rotary disc 11, the side pressure detection device 2 comprises two side pressure detection mechanical arm devices 21, the two side pressure detection mechanical arm devices 21 are respectively arranged at one side of the rotary disc 11 and the output ends of the two side pressure detection mechanical arm devices 21 are oppositely arranged, cushion pressure measurement 3 presses detection arm 32 including mounting bracket 31 and seat, and mounting bracket 31 is vertical state and installs on the top of base and mounting bracket 31 is located the front side of base, and the top of mounting bracket 31 still is provided with the fixed plate, sits to press detection arm 32 to be vertical state and installs on the fixed plate, back cushion pressure measurement 4 is including back cushion detection arm 41 and back of the chair support arm 42, back of the chair support arm 42 fixed mounting is on the top of base and back of the chair support arm 42 is located the rear side of base, and back cushion detection arm 41 is the upper segment of horizontal state setting at mounting bracket 31 to back cushion detection arm 41's output extends towards the direction that the back of the chair supported arm 42.
The driving assembly 12 includes a rotating motor 121 and a rotating shaft 124, the rotating motor 121 is fixedly mounted at the bottom end of the base, the top end of the rotating shaft 124 is connected with the bottom end of the rotating disc 11, the bottom end of the rotating shaft 124 penetrates through the base and extends downwards, the rotating shaft 124 and the base shaft are arranged, a driven wheel 123 is further arranged at the bottom end of the rotating shaft 124, a driving wheel 122 is arranged at the output end of the rotating motor 121, and the driving wheel 122 and the driven wheel 123 are connected through a belt in a transmission manner. Through setting up swivel work head 1 and can drive the rotation of rotating disc 11 through rotating electrical machines 121, swivel work head 1 can detect the tight cooperation of clamp of arm device 21 through two side pressures, conveniently detects out the rotation performance of swivel seat, can also press the cooperation simulation of pressing of detecting arm 32 through sitting and go out the rotation performance of swivel seat under the condition of different weight.
The two lateral pressure detection mechanical arm devices 21 are identical in structural arrangement and respectively comprise a lifting sliding table 211, a pressurizing air cylinder 212 and a pressing block 213, the lifting sliding table 211 is vertically arranged on the base, the pressurizing air cylinder 212 is horizontally arranged on a sliding block of the lifting sliding table 211, the output end of the pressurizing air cylinder 212 extends towards the direction of the rotating disc 11, and the pressing block 213 is fixedly arranged at the output end of the pressurizing air cylinder 212. Through setting up the work that lift slip table 211 can go up and down to the seat of co-altitude, confirm the high back of seat, pressurized cylinder 212 is ejecting with the output shaft makes compact heap 213 conflict outer wall of seat, under the relative effort of two side pressure detection mechanical arm devices 21, play two effects, one is firstly fixes the chair body of seat, make swivel work head 1 obtain fixedly when detecting swivel chair's rotation performance, and the other is to forming relative pressure detection to two sides of chair body, detect the performance of the whole side compressive resistance of chair body.
Sit and press detection arm 32 including pneumatic cylinder 321 and clamp plate subassembly, pneumatic cylinder 321 is vertical state and installs on the fixed plate and the output of pneumatic cylinder 321 passes the fixed plate and sets up downwards, clamp plate subassembly fixed mounting is at the output of pneumatic cylinder 321. The hydraulic cylinder 321 pushes the pressing plate assembly at the output end, pressure is applied to the cushion of the seat to simulate the weight of a person sitting on the cushion, meanwhile, the rotary workbench 1 tests the rotation performance of the rotary seat in different pressure states, and meanwhile, the other function of the sitting mechanical arm is to detect the whole bearing capacity of the seat.
The pressing plate assembly comprises a fixing frame 322 and two lower pressing plates 323, the fixing frame 322 is of a U-shaped structure, the two lower pressing plates 323 are fixedly installed on two extension sections of the fixing frame 322, and the middle position of the top end of the fixing frame 322 is connected with the output end of the hydraulic cylinder 321. Through setting up the condition that two holding down plate 323 imitatives sit on the seat, can also paste thick sponge in the bottom of holding down plate 323, prevent to the step pad on seat surface or leather pad produce the damage.
The headrest detection mechanical arm 41 comprises a driving motor 411, a driving shaft 412, two cams 413, two ejector rods 414 and two guide sleeves 415, wherein the two guide sleeves 415 are respectively installed at the upper section of one sliding rod 312, the other ends of the guide sleeves 415 extend towards the direction of the backrest support mechanical arm 42, the top ends of the two ejector rods 414 are respectively inserted into the guide holes of the guide sleeves 415, the driving shaft 412 is installed at the tail end of the guide sleeve 415 in a water state, the driving shaft 412 and the ejector rods 414 are in a vertical state, the two cams 413 are both installed on the driving shaft 412 and located at the tail end of the ejector rods 414, the output end of the driving motor 411 is connected with one end of the driving shaft 412, the rear ends of the ejector rods 414 are also provided with limit rings 416, and a return spring 417 is further sleeved between the limit rings 416 and the. Through the electronic drive shaft 412 that rotates of drive, two cams 413 on the drive shaft 412 drive two ejector pins 414 respectively along the regular ejecting forward of cam 413 bellying, all can return the normal position after ejecting at every turn under the effort of return spring 417, be in same horizontal plane with two ejector pins 414 with the altitude mixture control of the back cushion of seat, make the top of ejector pin 414 strike the back cushion under the electronic drive of drive, the top of ejector pin 414 still is provided with the imitative piece and prevents that the back cushion from receiving the destruction, strike the performance of test back cushion on it through anthropomorphic dummy's back head spoon.
The back of the chair supports arm 42 including translation slip table 421 and strutting arrangement, translation slip table 421 is the horizontality and installs on the base, and the output direction of translation slip table 421 extends towards the edge of rotating disc 11, strutting arrangement fixed mounting is on the slider of translation slip table 421.
Strutting arrangement is including first support 422, conflict pole 423, conflict board 424 and angle adjustment cylinder 425, first support 422 is T font structure, and one side on first support 422 top is provided with articulated frame, and the tail end of conflict pole 423 is articulated with articulated frame, and the head end of conflict pole 423 extends towards rotating disc 11 direction, and conflict board 424 fixed mounting is at the head end of conflict pole 423, the one end of angle adjustment cylinder 425 is articulated with the opposite side on first support 422 top, and the output of angle adjustment cylinder 425 is articulated with the bottom side of conflict pole 423 head end. The tail end through the contact rod 423 is articulated with the articulated frame for the promotion at angle modulation cylinder 425 can adapt to the height of different back of the chair to the conflict board 424 that makes the contact rod 423 top, plays the effect of supporting when the back cushion detects, and the effect of translation slip table 421 is the distance of control contact board 424 and back of the chair.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. The utility model provides an office chair wholeness ability detection device, including the base, its characterized in that: the automatic seat cushion pressure detection device is characterized by further comprising a rotary workbench (1), a side pressure detection device (2), a cushion pressure detection device (3) and a headrest pressure detection device (4), wherein the rotary workbench (1) comprises a rotary disc (11) for placing a seat, a driving assembly (12) for driving the rotary disc (11) to rotate and a plurality of work clamps (13) for fixing the seat, the rotary disc (11) is arranged at the top end of the base in a horizontal state, the driving assembly (12) is arranged below the rotary disc (11), all the work clamps (13) are arranged at the top end of the rotary disc (11) at equal intervals along the circumferential direction of the rotary disc (11), the side pressure detection device (2) comprises two side pressure detection mechanical arm devices (21), the two side pressure detection mechanical arm devices (21) are respectively arranged on one side of the rotary disc (11), and the output ends of the two side pressure detection mechanical arm devices (21) are oppositely arranged, the cushion pressure detection device (3) comprises an installation frame (31) and a sitting pressure detection mechanical arm (32), the installation frame (31) is installed at the top end of the base in a vertical state, the installation frame (31) is located on the front side of the base, a fixed plate is further arranged at the top end of the installation frame (31), the sitting pressure detection mechanical arm (32) is installed on the fixed plate in a vertical state, the back cushion pressure detection device (4) comprises a back cushion detection mechanical arm (41) and a back cushion support mechanical arm (42), the back cushion support mechanical arm (42) is fixedly installed at the top end of the base, the back cushion support mechanical arm (42) is located on the rear side of the base, the back cushion detection mechanical arm (41) is arranged at the upper section of the installation frame (31) in a horizontal state, and the output end of the back cushion detection mechanical arm (41) extends towards the;
the mounting frame (31) comprises two loop bars (311), two sliding rods (312) and two horizontal rods (313), the two loop bars (311) are vertically mounted on the base, a space is formed between the two loop bars (311), each sliding rod (312) is inserted into one loop bar (311), through holes (314) for inserting bolts are formed in all the loop bars (311) and the sliding rods (312), one end of each horizontal rod (313) is connected with the top end of the corresponding sliding rod (312), the other end of each horizontal rod (313) horizontally extends towards the upper part of the rotating disc (11), and the fixing plate is mounted at the top ends of the two horizontal rods (313) in a horizontal state;
the workpiece clamp (13) comprises a mounting box (131), an extrusion block (132), two clamping rods (133) and two return springs (134), the mounting box (131) is of a rectangular box-shaped structure with an opening at the upper end, the two clamping rods (133) are inserted into two sides of the interior of the mounting box (131) in a vertical state, the middle section of each clamping rod (133) is hinged with the mounting box (131), the two return springs (134) are respectively mounted on the outer side of the lower section of one clamping rod (133), the other side of each return spring (134) is connected with the inner wall of the mounting box (131) on the same side, the extrusion block (132) is of a rectangular structure, two opposite corners of the extrusion block (132) are further provided with arc transition curved surfaces, the extrusion block (132) is located between two clamping rods (133) in the installation box (131), the middle position of the extrusion block (132) horizontally penetrates through a rotating rod, and the rotating rod penetrates through the installation box (131) and is rotatably connected with the installation box (131).
2. The apparatus for detecting the performance of an office chair as a whole as claimed in claim 1, wherein: two side pressure detection mechanical arm device (21) structure sets up the same and all includes lift slip table (211), pressurization cylinder (212) and compact heap (213) lift slip table (211) are vertical state and install on the base, and pressurization cylinder (212) are horizontal state and install on the slider of lift slip table (211) and the output of pressurization cylinder (212) extends towards the direction of rotating disc (11), and compact heap (213) fixed mounting is at the output of pressurization cylinder (212).
3. The apparatus for detecting the performance of an office chair as a whole as claimed in claim 1, wherein: sit and press detection arm (32) including pneumatic cylinder (321) and clamp plate subassembly, pneumatic cylinder (321) are vertical state and install on the fixed plate and the output of pneumatic cylinder (321) passes the fixed plate and sets up downwards, clamp plate subassembly fixed mounting is at the output of pneumatic cylinder (321).
4. The apparatus for detecting the performance of an office chair as a whole as claimed in claim 3, wherein: the pressing plate assembly comprises a fixing frame (322) and two lower pressing plates (323), the fixing frame (322) is of a U-shaped structure, the two lower pressing plates (323) are fixedly installed on two extension sections of the fixing frame (322), and the middle position of the top end of the fixing frame (322) is connected with the output end of the hydraulic cylinder (321).
5. The apparatus for detecting the performance of an office chair as a whole as claimed in claim 1, wherein: drive assembly (12) are including rotating electrical machines (121) and rotation axis (124), rotating electrical machines (121) fixed mounting is in the bottom of base, the top of rotation axis (124) is connected with the bottom of rotating disc (11), the bottom of rotation axis (124) passes the base and extends downwards and rotation axis (124) and base coupling, the bottom of rotation axis (124) still is provided with from driving wheel (123), the output of rotating electrical machines (121) is provided with action wheel (122), action wheel (122) are connected through belt transmission with follow driving wheel (123).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810943938.5A CN109000952B (en) | 2018-08-18 | 2018-08-18 | Office chair overall performance detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810943938.5A CN109000952B (en) | 2018-08-18 | 2018-08-18 | Office chair overall performance detection device |
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| CN109000952A CN109000952A (en) | 2018-12-14 |
| CN109000952B true CN109000952B (en) | 2020-08-28 |
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| CN201810943938.5A Active CN109000952B (en) | 2018-08-18 | 2018-08-18 | Office chair overall performance detection device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697487B (en) * | 2020-12-08 | 2022-09-30 | 浙江昊国家具有限公司 | All-round quality detection device of office chair |
| CN113137944B (en) * | 2021-04-28 | 2023-07-21 | 深圳市鼎鑫盛光学科技有限公司 | Medical optical glass preparation detection device and detection method |
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2018
- 2018-08-18 CN CN201810943938.5A patent/CN109000952B/en active Active
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| CN1877285A (en) * | 2006-06-30 | 2006-12-13 | 湖南大学 | Testing apparatus for experiencing and evaluating seat performance |
| CN103091188A (en) * | 2013-01-09 | 2013-05-08 | 青岛海迅达精密检测设备有限公司 | Testing machine for rotation of seat and reciprocating abrasion of trundle |
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| CN109000952A (en) | 2018-12-14 |
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Effective date of registration: 20200729 Address after: 238000 Hefei vocational and technical college, Laoshan South Road, Chaohu Economic Development Zone, Hefei City, Anhui Province Applicant after: Shu Ting Address before: 238000 Hefei Vocational and Technical College, Granshan South Road, Chaohu Economic Development Zone, Anhui Province Applicant before: HEFEI TECHNOLOGY College |
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Effective date of registration: 20211228 Address after: 238000 Hefei vocational and technical college, Laoshan South Road, Chaohu Economic Development Zone, Chaohu City, Hefei City, Anhui Province Patentee after: HEFEI TECHNOLOGY College Address before: 238000 Hefei vocational and technical college, Laoshan South Road, Chaohu Economic Development Zone, Chaohu City, Hefei City, Anhui Province Patentee before: Shu Ting |
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