A light fastness testing device

Abstract

The invention discloses a light fastness detection device, which relates to the technical field of color fastness detection of textiles. The device comprises a machine base, a test tube is fixedly connected to the machine base, a lamp holder is installed in the middle of the bottom end of the test tube, the bottom of the lamp holder passes through the test tube and extends into the machine base, a mercury lamp is installed on the lamp holder, a rotating test frame is installed inside the test tube, the rotating test frame comprises an upper annular fixing plate, a lower annular positioning plate, a rotating gear ring and a plurality of sample fixing components, a shading mechanism for shielding the plurality of sample fixing components and a driving mechanism for driving all the sample fixing components to rotate are also arranged inside the test tube, and the invention can simultaneously perform comparative tests on a plurality of fabrics and reference standard fabrics through the cooperation of the rotating test frame and the shading mechanism, and the sample fixing component can conveniently and quickly clamp and fix the fabrics, thereby ensuring the firmness of the fabrics during testing, thereby improving the testing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of textile color fastness detection, and in particular to a light fastness detection device. Background Art

[0002] The quality of clothing includes appearance quality and internal quality. Color fastness is one of the internal qualities. The color fastness that consumers are familiar with includes color fastness to washing (the degree of color fading of clothing in soapy water), color fastness to friction (the degree of color fading of clothing after friction with dry or wet white cloth), and color fastness to sweat (the degree of color fading of clothing worn next to the body after contact with sweat). The color fastness to light of clothing is also called sunlight color fastness, which is to assess the degree of color change of clothing under sunlight. Consumers sometimes find that after wearing some clothes several times, the color on the back is darker than the front. This is because the color fastness to light of this clothing is too poor, and the front fades after being exposed to sunlight. In the process of performance testing of textiles, sunlight color fastness performance is an important indicator of textiles. The instrument used for its test is generally to simulate sunlight through mercury lamps to conduct accelerated aging tests, and to measure the color fastness changes over a certain period of time.

[0003] At present, the instruments on the market for measuring the light fastness of textiles usually use large instruments made of xenon arc lamps and carbon arc lamps. These instruments have many accessories, are expensive, cumbersome to operate, and relatively difficult to take and place samples. In addition, the traditional sunlight color fastness tester is equipped with a mercury lamp and a sample clamping device, but the number of sample clamps is small; the instrument has poor heat dissipation performance, which causes the mercury lamp to be easily damaged due to high temperature when used for a long time; the clamping of the sample is time-consuming and labor-intensive, affecting the test efficiency. Summary of the invention

[0004] The object of the present invention is to provide a light fastness detection device to solve the above problems.

[0005] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] A light fastness detection device comprises a machine base, a test tube is fixedly connected to the machine base, a cover plate is arranged on the top of the test tube, a lamp holder is installed in the middle of the bottom end of the test tube, the bottom of the lamp holder passes through the test tube and extends into the machine base, a mercury lamp is installed on the lamp holder, a rotating test frame is installed inside the test tube, the rotating test frame is located at the periphery of the mercury lamp, the rotating test frame comprises an upper annular fixing plate, a lower annular positioning plate, a rotating gear ring and a plurality of sample fixing assemblies, the upper annular fixing plate and the lower annular positioning plate are respectively fixed at the upper and lower ends of the inner side wall of the test tube, the rotating gear ring is rotatably arranged on the inner side wall of the upper annular fixing plate, all the sample fixing assemblies are evenly fixed at the bottom of the rotating gear ring along the circumferential direction, a shading mechanism for shielding a plurality of sample fixing assemblies and a driving mechanism for driving all the sample fixing assemblies to rotate are also arranged inside the test tube, the shading mechanism is sleeved on the rotating test frame, the driving mechanism is installed on the shading mechanism, and is transmission-connected with the rotating gear ring.

[0007] As a preferred scheme of the present invention, the sample fixing assembly includes a vertical plate, a placement plate, a magnetic plate, a clamp, a U-shaped pressure plate and two locking pieces, the vertical plate is fixed to the bottom of the rotating gear ring, the lower annular positioning plate is provided with a sliding groove, the bottom end of the vertical plate is slidably connected to the sliding groove, the two locking pieces are symmetrically arranged on the side of the vertical plate facing the mercury lamp, and the two locking pieces are threadedly connected to the vertical plate, the placement plate is arranged on one side of the vertical plate, and the placement plate is locked and fixed to one side of the vertical plate by two locking pieces, the magnetic plate is located between the placement plate and the vertical plate, and the magnetic plate is fixedly connected to the vertical plate, the clamp is rotatably connected to the bottom end of the side of the placement plate facing the mercury lamp by a torsion spring, the U-shaped pressure plate is located above the clamp, and the U-shaped pressure plate is slidably connected to the placement plate, and when the U-shaped pressure plate moves on the side wall of the placement plate to the side close to the magnetic plate, it is magnetically adsorbed and fixed to the magnetic plate.

[0008] As a preferred solution of the present invention, the locking member includes a screw and a handle, the screw is threadedly connected to the vertical plate, the handle is fixed on both sides of the screw end, and two grooves are formed on the placement plate, and the handle is adapted to the grooves.

[0009] As a preferred solution of the present invention, the shading mechanism includes a mounting plate and a plurality of shading plates, the mounting plate is located above the upper annular fixing plate and is fixedly connected to the test cylinder, all of the shading plates are evenly fixed to the bottom of the mounting plate along the circumferential direction and are located on the side of the sample fixing assembly facing the mercury lamp, an annular connecting plate is fixedly connected to the inner side of the lower annular positioning plate, and the bottoms of all of the shading plates are fixedly connected to the annular connecting plate.

[0010] As a preferred solution of the present invention, the number of the shading plates is less than the number of the sample fixing components.

[0011] As a preferred solution of the present invention, the driving mechanism includes a gear set and a gear locking member, the gear set is rotatably arranged on the mounting plate and meshes with the rotating gear ring, and the gear locking member is slidably connected to the gear set.

[0012] As a preferred solution of the present invention, cavities are provided inside the upper annular fixing plate and the lower annular positioning plate, a plurality of air inlet holes connected to the internal cavity of the upper annular fixing plate are provided on the inner wall of the upper annular fixing plate, a plurality of air exhaust ports connected to the internal cavity of the lower annular positioning plate are provided at the bottom of the lower annular positioning plate, an adsorption pump and a fan are also provided on the machine base, an output pipe of the adsorption pump passes through the test cylinder and then extends to the internal cavity of the upper annular fixing plate, and an input pipe of the fan passes through the test cylinder and then extends to the internal cavity of the lower annular positioning plate.

[0013] As a preferred solution of the present invention, a temperature and humidity meter and a timer are arranged on the side wall of the test tube, and a display and a mercury lamp switch, an adsorption pump switch, a fan switch and a timing button are arranged on the base.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention can simultaneously perform control tests on multiple fabrics and reference standard fabrics through the cooperation of the rotating test frame and the shading mechanism. If the fabric has multiple colors or various designs, different colors and designs of the same test fabric can be tested at the same time, without the need for additional fixed cardboard to shield the control group. The annular setting of the rotating test frame enables each test fabric to be evenly irradiated with sunlight simulated by the mercury lamp, so that the data obtained is more accurate and the test efficiency is improved.

[0016] 2. The sample fixing assembly in the present invention can conveniently and quickly clamp and fix the fabric, ensuring the firmness of the fabric during testing, thereby improving the test efficiency. The fabric is flat after fixing, avoiding wrinkles and overlaps during fabric testing that affect the test results. The sample fixing assembly can be flexibly adjusted for easy installation and disassembly.

[0017] 3. In the present invention, the adsorption pump and the fan are provided to achieve heat exchange inside the test tube, thereby avoiding the problem of excessive internal temperature causing the fabric to dry out and be damaged, and the mercury lamp to be seriously damaged due to heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a light fastness detection device is provided for an embodiment of the present invention;

[0020] Figure 2 A top view of a test cylinder is provided for an embodiment of the present invention;

[0021] Figure 3 The internal structure of the test tube is provided for the embodiment of the present invention. Figure 1 ;

[0022] Figure 4 The internal structure of the test tube is shown in FIG. Figure 1 ;

[0023] Figure 5 Provided for embodiments of the present invention Figure 4 A magnified view of the structure at A;

[0024] Figure 6 A structural schematic diagram of a shading mechanism is provided for an embodiment of the present invention;

[0025] Figure 7 A structural schematic diagram of a rotating test stand is provided for an embodiment of the present invention;

[0026] Figure 8 A schematic diagram of the structure of a sample fixing assembly is provided for an embodiment of the present invention;

[0027] Fig. 9 A top structural cross-sectional view of a sample fixing assembly is provided for an embodiment of the present invention.

[0028] The numbers in the figure represent the following: 1, machine base; 2, test tube; 3, cover plate; 4, lamp holder; 5, mercury lamp; 6, rotating test frame; 7, upper annular fixing plate; 8, lower annular positioning plate; 9, rotating gear ring; 10, sample fixing assembly; 11, driving mechanism; 13, shading mechanism; 14, air inlet; 15, air outlet; 16, adsorption pump; 17, fan; 18, temperature and humidity instrument;

[0029] 101. Vertical plate; 102. Placement plate; 103. Magnetic plate; 104. Clip; 105. U-shaped pressure plate; 106. Locking piece; 107. Slide groove; 108. Screw; 109. Handle; 110. Groove; 111. Gear set; 112. Gear locking piece; 131. Mounting plate; 132. Shading plate; 133. Ring connecting plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 9 As shown, the present invention provides a light fastness testing device, including a machine base 1, a test tube 2 is fixedly connected to the machine base 1, a cover plate 3 is arranged on the top of the test tube 2, a lamp holder 4 is installed at the middle of the bottom end of the test tube 2, the bottom of the lamp holder 4 passes through the test tube 2 and extends into the machine base 1, a mercury lamp 5 is installed on the lamp holder 4, a rotating test frame 6 is installed inside the test tube 2, the rotating test frame 6 is located at the periphery of the mercury lamp 5, the rotating test frame 6 includes an upper annular fixing plate 7, a lower annular positioning plate 8, a rotating gear ring 9 and a plurality of sample fixing components 10, the upper annular fixing plate 7 The upper and lower annular positioning plates 8 are respectively fixed at the upper and lower ends of the inner wall of the test cylinder 2, the rotating gear ring 9 is rotatably set on the inner wall of the upper annular fixing plate 7, and all the sample fixing assemblies 10 are evenly fixed on the bottom of the rotating gear ring 9 along the circumferential direction. The inside of the test cylinder 2 is also provided with a shading mechanism 13 for shielding several sample fixing assemblies 10, and a driving mechanism 11 for driving all the sample fixing assemblies 10 to rotate. The shading mechanism 13 is sleeved on the rotating test frame 6, and the driving mechanism 11 is installed on the shading mechanism 13, and is connected to the rotating gear ring 9 in transmission.

[0032] A temperature and humidity meter 18 is provided on the side wall of the test tube 2, and a display, a switch for the mercury lamp 5, a switch for the adsorption pump 16, a switch for the fan 17, a timer and a timing button are provided on the machine base 1.

[0033] When testing the color fastness of fabric to light, first cut out a plurality of pieces of fabric of suitable size, then place the fabric to be tested and the reference standard fabric on a plurality of sample fixing assemblies 10 for fixing, and then drive the rotating gear ring 9 to rotate through the driving mechanism 11. The driving mechanism 11 includes a gear set 111 and a gear locking member 112. The gear set 111 is rotatably set on the mounting plate 131 and meshes with the rotating gear ring 9. The gear locking member 112 is slidably connected in the gear set 111. The staff holds the gear locking piece 112 and moves it upwards to release the locking state of the gear set 111, and then rotates the gear locking piece 112, thereby driving the gear set 111 to rotate. The rotation of the gear set 111 drives the rotating gear ring 9 to rotate, thereby driving all the sample fixing components 10 to rotate, so as to rotate part of the test fabric and half of the reference standard fabric to the shading mechanism 13 for shielding, so that only half of the sample and the reference standard remain in the light. After the adjustment is completed, the gear locking piece 112 is released, the gear locking piece 112 falls into the gear set 111, and the gear set 111 is locked to prevent the rotating test frame 6 from rotating during the test, and then the cover plate 3 is covered to ensure that the inside of the test tube 2 is in a closed and lightless state. At this time, the timer and the mercury lamp 5 are turned on to perform a light test.

[0034] Among them, Figure 5 As shown in the figure, a limiting groove is provided inside the gear in the gear set 111 that is slidably connected to the gear locking member 112, and the limiting groove extends into the shading mechanism 13, so that the gear locking member 112 can be released from the locked state by rotating after moving up to disengage from the shading mechanism 13, but the locking method of the gear set 111 in the present invention is not limited to this method, and any method in the prior art that can lock the rotation state of the gear set 111 can be used.

[0035] The invention can simultaneously perform comparative tests on multiple fabrics and reference standard fabrics through the cooperation of the rotating test frame 6 and the shading mechanism 13. If the fabric has multiple colors or various designs, different colors and designs of the same test fabric can be tested at the same time, without the need for additional fixed cardboard to shield the control group. The annular setting of the rotating test frame 6 enables each test fabric to be evenly irradiated with the simulated sunlight irradiated by the mercury lamp 5, so that the data obtained is more accurate and the test efficiency is improved. In addition, the sample fixing component 10 is easy to disassemble and assemble when fixing the test fabric and the reference standard fabric, and can be quickly disassembled and assembled according to the number of samples required for the actual test.

[0036] Specifically, the shading mechanism 13 includes a mounting plate 131 and a plurality of shading plates 132. The mounting plate 131 is located above the upper annular fixing plate 7 and is fixedly connected to the test tube 2. All shading plates 132 are evenly fixed to the bottom of the mounting plate 131 along the circumferential direction and are located on the side of the sample fixing assembly 10 facing the mercury lamp 5. An annular connecting plate 133 is fixedly connected to the inner side of the lower annular positioning plate 8, and the bottoms of all shading plates 132 are fixedly connected to the annular connecting plate 133.

[0037] The number of the light shielding plates 132 is less than the number of the sample fixing assemblies 10 .

[0038] When the test fabrics are blocked, each test fabric and half of the reference standard fabric can be blocked, or all the test fabrics and half of the blue wool can be blocked according to the test requirements.

[0039] Specifically, the sample fixing assembly 10 includes a vertical plate 101, a placement plate 102, a magnetic attraction plate 103, a clamp 104, a U-shaped pressure plate 105 and two locking members 106. The vertical plate 101 is fixed to the bottom of the rotating gear ring 9, and a slide groove 107 is provided on the lower annular positioning plate 8. The bottom end of the vertical plate 101 is slidably connected to the slide groove 107. The two locking members 106 are symmetrically arranged on the vertical plate 101 on one side facing the mercury lamp 5, and the two locking members 106 are both threadedly connected to the vertical plate 101. The placement plate 102 is arranged on one side of the vertical plate 101, and the placement plate 102 is locked and fixed on one side of the vertical plate 101 by two locking pieces 106, the magnetic plate 103 is located between the placement plate 102 and the vertical plate 101, and the magnetic plate 103 is fixedly connected to the vertical plate 101, the clip 104 is rotatably connected to the bottom end of the placement plate 102 facing the mercury lamp 5 through a torsion spring, the U-shaped pressure plate 105 is located above the clip 104, and the U-shaped pressure plate 105 is slidably connected to the placement plate 102, and when the U-shaped pressure plate 105 moves on the side wall of the placement plate 102 to the side close to the magnetic plate 103, it is magnetically adsorbed and fixed to the magnetic plate 103.

[0040] When fixing the test fabric and the reference standard fabric, first press the bottom of the clip 104 to open the clip 104, pass the fabric through the U-shaped pressing plate 105 and place it vertically inside the clip 104, release the clip 104, the bottom of the fabric is fixed by the clip 104, and then push the U-shaped pressing plate 105 upward. The U-shaped pressing plate 105 is magnetically attracted by the magnetic plate 103 during the movement, so that the U-shaped pressing plate 105 can contact the fabric and move up along the surface of the fabric, and flatten the fabric during the movement, so that the fabric is flatly unfolded, and the U-shaped pressing plate 105 moves to the top of the fabric and fixes its top, so that both ends of the fabric can be fixed, and the fabric can be placed parallel to the On the side wall of the placement plate 102, it is worth noting that both sides of the inner wall of the U-shaped pressure plate 105 are slidably connected with protrusions, and both side walls of the placement plate 102 are provided with sliding grooves 107, and the protrusions can slide and cooperate in the sliding grooves 107. When the U-shaped pressure plate 105 moves up, the protrusions move up along the sliding grooves 107, and when the U-shaped pressure plate 105 is adsorbed, the protrusions can slide along the inner side of the U-shaped pressure plate 105; the sample fixing component 10 in the present invention can conveniently and quickly clamp and fix the fabric, ensure the firmness of the fabric during testing, thereby improving the test efficiency, and the fabric is flat after fixing, avoiding wrinkles and overlaps during the fabric testing process that affect the test results.

[0041] Furthermore, the locking member 106 includes a screw 108 and a handle 109 . The screw 108 is threadedly connected to the vertical plate 101 . The handle 109 is fixed on both sides of the end of the screw 108 . Two grooves 110 are provided on the placement plate 102 , and the handle 109 is adapted to fit the grooves 110 .

[0042] The sample fixing assembly 10 can be disassembled and adjusted according to the number of test fabrics required. When installing the sample fixing assembly 10, the placement plate 102 is placed on one side of the vertical plate 101, and then the placement plate 102 is moved close to the vertical plate 101, so that the two grooves 110 on the placement plate 102 pass through the two handles 109, and then the handle 109 is rotated to drive the screw 108 to rotate and lock. After locking, the handle 109 is not parallel to the groove 110, so that the placement plate 102 is fixed on the vertical plate 101. The sample fixing assembly 10 can be flexibly adjusted for easy installation and disassembly.

[0043] Both the upper annular fixing plate 7 and the lower annular positioning plate 8 have cavities therein. The inner wall of the upper annular fixing plate 7 is provided with a plurality of air inlet holes 14 connected to the internal cavity of the upper annular fixing plate 7. The bottom of the lower annular positioning plate 8 is provided with a plurality of air exhaust ports 15 connected to the internal cavity of the lower annular positioning plate 8. An adsorption pump 16 and a fan 17 are also provided on the machine base 1. The output pipe of the adsorption pump 16 extends to the internal cavity of the upper annular fixing plate 7 after passing through the test tube 2. The input pipe of the fan 17 extends to the internal cavity of the lower annular positioning plate 8 after passing through the test tube 2.

[0044] The interior of the test cylinder 2 is in a closed state. When the mercury lamp 5 irradiates for a certain period of time, a large amount of heat will be generated in the test cylinder 2, and the test temperature of the test fabric should be maintained within 70+10°C. When the temperature and humidity meter 18 shows that the internal temperature of the test cylinder 2 is too high, press the adsorption pump switch and the fan switch to start the adsorption pump 16 and the fan 17. The heat inside the test cylinder 2 is sucked into its internal cavity from the air inlet 14 at the bottom of the upper annular fixing plate 7 through the adsorption pump 16, and all the internal heat is extracted. The external air can be transported to the internal cavity of the lower annular positioning plate 8 through the fan 17, and evenly transported to the inside of the test cylinder 2 from multiple exhaust ports 15, thereby realizing heat exchange inside the test cylinder 2, avoiding the problem of excessive internal temperature causing drying and damage to the fabric, and serious damage to the mercury lamp 5 due to heat.

[0045] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A light fastness detection device, comprising a base (1), characterized in that: A test tube (2) is fixedly connected to the machine base (1), a cover plate (3) is arranged on the top of the test tube (2), a lamp holder (4) is installed in the middle of the bottom end of the test tube (2), the bottom of the lamp holder (4) passes through the test tube (2) and extends into the machine base (1), a mercury lamp (5) is installed on the lamp holder (4), a rotating test frame (6) is installed inside the test tube (2), the rotating test frame (6) is located on the periphery of the mercury lamp (5), the rotating test frame (6) comprises an upper annular fixing plate (7), a lower annular positioning plate (8), a rotating gear ring (9) and a plurality of sample fixing components (10), the upper annular fixing plate (7) and the lower annular positioning plate (8) are arranged on the rotating test frame (6), and ... The positioning plates (8) are respectively fixed to the upper and lower ends of the inner wall of the test cylinder (2); the rotating gear ring (9) is rotatably arranged on the inner wall of the upper annular fixing plate (7); all the sample fixing assemblies (10) are evenly fixed to the bottom of the rotating gear ring (9) along the circumferential direction; a shading mechanism (13) for shielding a plurality of sample fixing assemblies (10) and a driving mechanism (11) for driving all the sample fixing assemblies (10) to rotate are also arranged inside the test cylinder (2); the shading mechanism (13) is sleeved on the rotating test frame (6); the driving mechanism (11) is installed on the shading mechanism (13) and is transmission-connected to the rotating gear ring (9); The sample fixing assembly (10) comprises a vertical plate (101), a placement plate (102), a magnetic plate (103), a clamp (104), a U-shaped pressure plate (105) and two locking members (106), wherein the vertical plate (101) is fixed to the bottom of the rotating gear ring (9), a slide groove (107) is provided on the lower annular positioning plate (8), the bottom end of the vertical plate (101) is slidably connected to the slide groove (107), the two locking members (106) are symmetrically arranged on the vertical plate (101) on a side facing the mercury lamp (5), and the two locking members (106) are both threadedly connected to the vertical plate (101), the placement plate (102) is arranged on one side of the vertical plate (101), and the placement plate (102) is locked and fixed to one side of the vertical plate (101) by two locking members (106), the magnetic plate (103) is located between the placement plate (102) and the vertical plate (101), and the magnetic plate (103) is fixedly connected to the vertical plate (101), the clip (104) is rotatably connected to the bottom end of the placement plate (102) facing the mercury lamp (5) by a torsion spring, the U-shaped pressing plate (105) is located above the clip (104), and the U-shaped pressing plate (105) is slidably connected to the placement plate (102), and when the U-shaped pressing plate (105) moves on the side wall of the placement plate (102) to a side close to the magnetic plate (103), it is magnetically adsorbed and fixed to the magnetic plate (103); The shading mechanism (13) comprises a mounting plate (131) and a plurality of shading plates (132); the mounting plate (131) is located above the upper annular fixing plate (7) and is fixedly connected to the test tube (2); all the shading plates (132) are evenly fixed to the bottom of the mounting plate (131) along the circumferential direction and are located on the side of the sample fixing assembly (10) facing the mercury lamp (5); an annular connecting plate (133) is fixedly connected to the inner side of the lower annular positioning plate (8); and the bottoms of all the shading plates (132) are fixedly connected to the annular connecting plate (133); The driving mechanism (11) comprises a gear set (111) and a gear locking member (112); the gear set (111) is rotatably mounted on a mounting plate (131) and meshes with the rotating gear ring (9); and the gear locking member (112) is slidably connected to the gear set (111); The upper annular fixing plate (7) and the lower annular positioning plate (8) are provided with cavities therein; the inner wall of the upper annular fixing plate (7) is provided with a plurality of air inlet holes (14) which are in communication with the internal cavity of the upper annular fixing plate (7); the bottom of the lower annular positioning plate (8) is provided with a plurality of air outlets (15) which are in communication with the internal cavity of the lower annular positioning plate (8); the machine base (1) is further provided with an adsorption pump (16) and a fan (17); the output pipe of the adsorption pump (16) passes through the test cylinder (2) and then extends into the internal cavity of the upper annular fixing plate (7); the input pipe of the fan (17) passes through the test cylinder (2) and then extends into the internal cavity of the lower annular positioning plate (8).

2. The light fastness detection device according to claim 1, characterized in that: The locking member (106) comprises a screw rod (108) and a handle (109), wherein the screw rod (108) is threadedly connected to the vertical plate (101), and the handle (109) is fixed to both sides of the end of the screw rod (108), and two grooves (110) are formed on the placement plate (102), and the handle (109) is adapted to fit the grooves (110).

3. The light fastness detection device according to claim 1, characterized in that: The number of the light shielding plates (132) is less than the number of the sample fixing assemblies (10).

4. The light fastness detection device according to claim 1, characterized in that: A temperature and humidity meter (18) and a timer are arranged on the side wall of the test cylinder (2), and a display and a mercury lamp switch, an adsorption pump switch, a fan switch and a timing button are arranged on the machine base (1).

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