A qualified office chair inspection needs to do the following：
1.Purpose:
In order to clarify the inspection specifications and requirements of CQI Inspection Company for Office chair , this product inspection requirement is specially written to standardize the company’s quality inspection service level for customers.
2.Scope of application
This inspection technical document is used to standardize the pre-shipment inspection service of Office chair .
3.Defect definitionfor Office chair inspection:
Serious defects (CRT): the user’s life is a major hazard or has the potential to harm and violate the relevant safety requirements of defects
Major defects (MAJ): affect the use of the product, reduce product reliability and service life or seriously affect the product image defects
Minor defects ((MIN): the product has a slight appearance defects and does not affect the product function defects
4.The level of inspection:
Sampling standards: MIL-STD-105E
Acceptance level (AQL): CR=O MA=1.5 MI=4.0
5.Impermissible defects for Office chair inspection
(1) There must not be broken, burst line, throw line and other defects. (If there is 1 unit in the sample inspection, the batch of products will be re-inspected) (MAJ)
(2) No white and rotten leather surface and no grain of leather. (MAJ)
(3) No shortcomings of visualization within the close distance. (30% of the following defects can be accepted, more than 30% of the re-inspection and repair of this batch of products)
(4）No head, shoulders, side strips, flush line does not correspond to the asymmetric skew. (MAJ)
(5）No unevenness, full parts are not full and molded to the curved wood board. (MIN)
(6) The leather or cloth surface must not have stains, paint removal or discoloration. (MIN)
(7) There must not be any stitching line exposed and different from the leather color. (MIN)
(8) No visible pores, scars, peeling, or threads. (MIN)
(9) Each accessory must not have an obvious lack of appearance. (MIN)
(10) No obvious inconsistencies in the depth of the pulling point. (MIN)
(11) The full part of the seat back cushion will not have too much wrinkling. (MIN)
(12) The edge of the back of the seat should not be bent. (MIN)
(13) No malfunction or inoperability. (Major deficiencies, there are 1PC, then the whole batch of full inspection)
(14) The steam pressure bar lift out of control (chassis steam pressure bar hole damage rupture or punch hole position is too large). (MAJ)
(15) after the group stand, sitting body is not stable. (MAJ)
(16) The steam pressure bar makes strange sounds, and the steam pressure bar does not function well (poor lifting effect). (This phenomenon, such as the appearance of more than 2PCS then full inspection) (MAJ)
(17) The chassis control lever must not be too soft. (MAJ)
(18) the surface is clean and good, clear grain, brightness consistent, not whitish, air lines, oil stains and other bad. (MIN)
(19) The surface should not have shrinkage, bulging cell, deformation, armrest gasket should not have rust. (MIN)
(20) There must not be poor structure, unable to set up.
(21) The nut is loose or the nut hole is too large. (MAJ)
(22）The hole position is wrong or wrong ＜(MAJ)
(23）The board is warped too much (MAJ)
(24) The nut hole is blocked (MAJ)
(25）Chair feet must not have cracking and bad injection molding (MAJ)
(26) The wheels must not have bad injection molding PIN damage. (MAJ)
(27) The screws do not have the silk teeth. (MAJ)
(28) No seat, back cushion, color inconsistency or inconsistent pattern and the specifications used do not meet the.
(29) The same set of seat and back cushions appear two patterns or two types of fabric (MAJ)
(30) A set of two leather patterns or two types of fabric cannot appear. (MAJ)
(31) Whether the production is according to the specifications required by the customer. (MAJ)
(32）No inconsistency between finished product specifications and customer requirements.
(33) The seat and back cushion length, width and thickness should meet the requirements. (Tolerance: +1/4″) (MAJ)
(34) The depth, height and width should meet the requirements. (Tolerance: +1/4″) (MAJ)
(35）The back elevation and stiffness should be accurate. (The customer confirms the back bend and chassis as the standard, +10 tolerance) (MAJ)
(36) The overall structure should meet the requirements. (Specific requirements see process inspection standards) (MAJ)
(37) There must be no glue removal is more obvious, if there is 1PCS, the whole batch of products will be inspected. (MAJ)
(38) The trademark of the relevant laws should be posted in full, the location should be posted correctly.
(39）No dangerous products that harm human body. (MAJ)
(40) There must be no external leakage of nails. (MIN)
(41) No sharp edges, sharp corners, burrs, paint loss, rust, or poor welding on each iron part. (MIN)
(42) The handrail iron is not tightened, the board is broken, the chassis is broken, and the bottom plate is twisted and screwed out. (There are 1PC, then the full inspection) (MAJ)
(43）No control rod disconnected and steam pressure bar suddenly broken. (There is 1PCS, then full inspection) (MAJ)
6.Common Testing Items for Office chair Inspection
1）Barcode Scanning test
2）Rubber test
3）Wheels of the base rub test
4）Seam strength test
5）Assembly test ( if any,)
6）Accessible sharp Point & Sharp edges check ( if any,)
7）Structure & Workmanship
8）Color shading check
9)Stability
Seat static load 600 N, forward and lateral tilting force not less than 20 N, backward tilting force not less than 100 N
10)Seat impact
Impact height 152 mm, impact mass 102 kg, 1 time. If the seat surface is adjustable, adjusted to the highest and lowest position of each impact 1 time.
Seat surface, seat back static load
Seat surface: 1 300 N.
Chair back: 450 N, 10 times
11)Armrest vertical down static load
750 N, lmin
12)Armrest water calm load
445 N, lmin
13)Caster reciprocating wear
113 kg vertical load on the seat, 2,000 tests on the test platform with obstacles; 98,000 tests on the horizontal test platform without obstacles
14)Static load on the base
7 560N, l min, 2 times
15)Seat and back durability
Seat surface load 950 N, 100,000 times
Seat back load 330 N, 100,000 times
Seat balance load: 950 N
16)Backrest reciprocation durability
Seat load 102 kg, seat back load 445 N, 120 000 cycles
Seat load 102 kg, seat back load 334 N, 120 000 cycles
17)Tilt mechanism
300,000 cycles
18)Seat surface rotation durability
Seat surface static load 102 kg, rotation angle (360±10). The rotation frequency is 5 times/min to 15 times/min, 120,000 times. If the seat surface is adjustable, adjust to the highest and lowest position for 60,000 cycles each.
19)Seat durability
Chair seat reciprocating impact durability: 57 kg sandbag, impact height 30 mm, 10 times / min ~ 30 times / min, 100 000 times
Seat bending alternating load durability: two loading points
Alternating load of 734N, 10 times/min to 30 times/min, 40,000 times on the load point
20)Drop
Drop height 200 mm, 10 times
7.Summary
The above is the specific content of the Office chair inspection standard, but with the continuous development of the product manufacturing industry and the adoption of new materials and new production processes, new types of quality problems and new product testing requirements will directly result. Therefore, it is necessary to update the Office chair inspection standard irregularly.
CQI5 is committed to providing importers worldwide with product quality inspection services that far exceed those of our peers. If you are planning to import or have imported from China or Southeast Asian countries, please contact us cs’@’cqipro.com to learn more about how we can make your imports safer.
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