A rearing environment test device for animal photoperiod research

Abstract

The utility model relates to animal illumination experiment device field discloses a kind of feeding environment experimental device for animal illumination research, including timing socket, monitoring display screen, rearing cage and the light-shielding cloth cover of complete containment package in the outside of rearing cage, the top of light-shielding cloth cover is roof, and the roof of light-shielding cloth cover is fixedly installed with adjustable ceiling lamp, adjustable ceiling lamp is installed in timing socket by the power cord A electrical plug connection of live plug A, and light regulator for adjusting adjustable ceiling lamp illuminance is installed on power cord A;Timing socket is electrically connected household ac power supply, and timing socket is used to set power-on frequency or / and length of time;The inside of the cover of light-shielding cloth cover is connected with several photometers, and each photometer is electrically connected with monitoring display screen.The utility model monitoring display screen gathers the video stream data of camera and the illumination data of photometer and stores and displays and call, can be applicable to different illumination time or different illumination intensity environment under animal sleep and growth each item experimental research.

Description

Technical Field

[0001] This utility model relates to the field of animal lighting experimental devices, and more particularly to a feeding environment experimental device for animal lighting research. Background Technology

[0002] Currently, animal research is generally conducted using SPF-grade animal facilities. SPF-grade animal facilities are designed to allow the presence of non-specific pathogens (as opposed to specific pathogens, which include mousepox virus, Sendai virus, and Toxoplasma gondii). SPF-grade animal facilities primarily provide the basic experimental conditions for high-end scientific research such as drug development, vaccine testing, and gene editing. SPF-grade animal facilities require strict zoning and differential pressure control of each zone, with stringent barrier measures. The construction and maintenance costs of SPF-grade animal facilities are also relatively high. The relationship between light environment parameters and animal growth and sleep (including the occurrence of insomnia) during the growth process is a research topic that needs to be studied. However, due to the high cost of SPF-grade animal facilities and the lack of animal housing experimental devices that can adjust light environment parameters, it is currently impossible to conduct research on the effects of different light intensities and durations on animal sleep or insomnia. For example, it is impossible to study whether different light durations or intensities lead to growth retardation, reproductive delays, or insomnia in mice. Utility Model Content

[0003] The purpose of this invention is to provide a breeding environment experimental device for animal lighting research. The internal lighting environment parameters of the breeding environment experimental device can be set and adjusted. The light regulator adjusts the illuminance and light color, the timer socket sets the lighting time, and photometers are set at different positions inside the light-shielding cloth cover to obtain the illuminance data at each position. The monitoring display screen collects video stream data from the camera and illuminance data from the photometers, and stores and retrieves the data for display. This invention is applicable to various experimental studies on animal sleep, growth, development and reproduction under different lighting times or light intensities.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An experimental apparatus for animal lighting research includes a timer socket, a monitoring display screen, a rearing cage, and a light-blocking cloth cover that completely encloses the rearing cage. The top of the light-blocking cloth cover is a top plate, on which an adjustable pendant light is fixedly installed. The adjustable pendant light is electrically connected to the timer socket via a power cord A with a power plug A. A light regulator for adjusting the illuminance of the adjustable pendant light is installed on the power cord A. The timer socket is electrically connected to a 220V household AC power supply and is used to set the power-on frequency and / or power-on duration. Several photometers are connected to the inside of the light-blocking cloth cover, and each photometer is electrically connected to the monitoring display screen.

[0006] To better realize this utility model, a camera is fixed on the top plate of the light-shielding cloth cover. The camera is electrically connected to the timer socket via a power cord B with a power plug B. The timer socket synchronously sets the power-on frequency and / or power-on duration of the adjustable chandelier and the camera. The camera is electrically connected to the monitoring display screen.

[0007] Preferably, the feeding cage is rectangular in shape, and all six sides of the feeding cage are composed of cage frame units connected together. One side of the feeding cage has a cage opening, and a cage door that closes the cage opening is hinged to the feeding cage.

[0008] Preferably, the cage frame units on two adjacent sides of the feeding cage are connected and fixed by structural reinforcing columns. The cage frame unit consists of a mesh plate and a connecting insert edge located on the end side of the mesh plate. The structural reinforcing column has a slot for interlocking and locking with the connecting insert edge of the cage frame unit.

[0009] Preferably, the light-shielding cloth cover is in the shape of a cuboid, the light-shielding cloth cover has a cuboid light-shielding cavity that completely accommodates the feeding cage, and the bottom of the light-shielding cloth cover is the opening of the cuboid light-shielding cavity.

[0010] Preferably, the light-blocking cloth cover has a door on one side, and the door is composed of two overlapping cloth door sections.

[0011] Preferably, the rectangular shading chamber of the shading cloth is 2-5 cm larger than the length, width, and height of the feeding cage.

[0012] Preferably, the light regulator has a light recorder for recording the light intensity, and the timer socket has a power on / off recorder for recording the on / off time, power on frequency and / or power on duration. The monitoring display screen is connected to the power on / off recorder of the timer socket and the light recorder of the light regulator, respectively.

[0013] Preferably, the length of the overlapping portion of the two fabric door panels is a percentage of the total length of the door panel. ~ .

[0014] Preferably, the light-shielding cloth cover is made of polyester fiber, and the inner and outer surfaces of the polyester fiber cover are coated with a black adhesive coating to enhance light shading; the top plate of the light-shielding cloth cover is provided with reinforcing steel wire mesh.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0016] (1) This utility model provides a breeding environment experimental device. The internal lighting environment parameters of the breeding environment experimental device can be set and adjusted. The light regulator adjusts the illuminance and light color, the timer socket sets the lighting time, and a photometer is set in different positions inside the light-shielding cloth cover. The illuminance data of each position is obtained through the photometer. The monitoring display screen collects the video stream data of the camera and the illuminance data of the photometer and stores and retrieves the data for display. This utility model can be applied to various experimental studies on animal sleep, growth, development and reproduction under different lighting times or different lighting intensities.

[0017] (2) The camera and the adjustable chandelier of this utility model are both electrically connected to the timer socket. The timer socket synchronously turns the camera and the adjustable chandelier on and off, ensuring that while there is light inside the experimental device for raising animals, video streams can be collected simultaneously, and video data of animals’ sleep, clinical manifestations and growth activities under light conditions can be collected. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the feeding cage in the embodiment;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the middle cage frame unit;

[0020] Figure 3 This is a schematic diagram of the internal structure of the adjustable chandelier and other components arranged under the light-shielding cloth in the embodiment.

[0021] Figure 4 for Figure 3 A diagram showing the length, width, and height;

[0022] Figure 5 This is a block diagram illustrating the principle structure of the connection between the monitoring display screen, camera, and light meter in the embodiment.

[0023] Figure 6 The figure shows the results of a study on the effect of the experimental device for the feeding environment of this utility model on the levels of monoamine neurotransmitters and melatonin in the blood of mice under light.

[0024] Figure 7This figure shows the results of a study on the effect of the experimental device for the feeding environment of this invention on the GABA content in the hypothalamus during a light experiment in mice.

[0025] The names corresponding to the reference numerals in the attached figures are as follows:

[0026] 1 - Feeding cage, 2 - Cage frame unit, 21 - Mesh panel, 22 - Connecting insert, 3 - Structural reinforcement column, 4 - Cage door, 5 - Blackout cloth cover, 6 - Top plate, 7 - Cover opening, 8 - Cover door, 9 - Adjustable pendant light, 10 - Light regulator, 11 - Timer socket, 12 - Camera, 13 - Light meter, 14 - Monitoring display screen. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments:

[0028] Example

[0029] like Figures 1-5 As shown, an experimental apparatus for animal lighting research includes a timer socket 11, a monitoring display screen 14, a rearing cage 1, and a light-blocking cloth cover 5 that completely encloses the rearing cage 1. The rearing cage 1 can be equipped with necessary facilities or supplies for animal rearing and survival, such as water troughs and food troughs (and may also include other supplies such as insulating wood shavings). The monitoring display screen 14 is a display screen with a storage module for storing and retrieving data in a time sequence. The top of the light-blocking cloth cover 5 is a top plate 6. Preferably, the light-blocking cloth cover 5 is made of polyester fiber, and both the inner and outer surfaces of the polyester fiber are coated with a black adhesive coating to enhance light blocking. The top plate 6 of the light-blocking cloth cover 5 has reinforcing steel wire mesh inside, which strengthens the top plate 6 and allows it to support components such as adjustable pendant lights 9 and cameras 12. Since the light-blocking cloth cover 5 is installed on the rearing cage 1, the top and the entire rearing cage 1 also have strong load-bearing capacity.

[0030] In some embodiments, the rearing cage 1 is generally rectangular in shape, and all six sides of the rearing cage 1 are connected by cage frame units 2. One side of the rearing cage 1 has a cage opening, and a cage door 4 is hinged to the rearing cage 1 to close the cage opening. The light-shielding cover 5 is generally rectangular in shape, and the light-shielding cover 5 has a rectangular light-shielding cavity that completely accommodates the rearing cage 1. The bottom of the light-shielding cover 5 is the opening 7 of the rectangular light-shielding cavity, which covers the rearing cage 1 from bottom to top. The cage frame units 2 on two adjacent sides of the rearing cage 1 are connected and fixed by structural reinforcing columns 3, such as... Figure 2As shown, the cage frame unit 2 consists of a mesh plate 21 and a connecting insert edge 22 located on the end side of the mesh plate 21. The structural reinforcing column 3 has a slot that is mutually inserted and locked with the connecting insert edge 22 of the cage frame unit 2. The connecting insert edge 22 of the cage frame unit 2 is correspondingly inserted and locked into the slot of the structural reinforcing column 3. Figure 1 As shown, the rearing cage 1 includes a top plate, a bottom plate, and four side plates. The top plate, bottom plate, and four side plates are all constructed using cage frame units 2. The cage frame units 2 at the top plate location are connected and fixed to the cage frame units 2 at the four side plate locations via structural reinforcing columns 3. Similarly, the cage frame units 2 at the bottom plate location are connected and fixed to the cage frame units 2 at the four side plate locations via structural reinforcing columns 3. Adjacent side plates are also connected and fixed via structural reinforcing columns 3. The structural reinforcing columns 3 are rectangular edges of the rearing cage 1 and serve as interlocking connections and structural reinforcement. (See also...) Figure 1 The right side panel of the rearing cage 1 has a cage opening, and a cage door 4 is hinged to the structural reinforcing column 3 corresponding to the side panel of the rearing cage 1. The cage door 4 can close or open the cage opening.

[0031] like Figure 3 , Figure 4 As shown, an adjustable chandelier 9 is fixedly installed on the top plate 6 of the light-shielding cover 5. The adjustable chandelier 9 is electrically connected to the timer socket 11 via a power cord A with a power plug A. A light regulator 10 for adjusting the illuminance of the adjustable chandelier 9 is installed on the power cord A. In this embodiment, the adjustable chandelier 9 preferably uses an LED light or a 25W tungsten bulb and is a light fixture that can be dimmed (preferably, the light fixture can also perform multi-color dimming, such as three-color dimming, which can adjust and change three colors, such as white light, warm yellow light, and neutral light, where neutral light is light between white light and warm yellow light, and neutral light can also be natural light). The light regulator 10 of this utility model is an existing mature rotary dimmer (also known as a rotary voltage-adjusting stepless switch, which realizes the adjustment of the illuminance of the adjustable chandelier 9). The timer socket 11 is electrically connected to a 220V household AC power supply. The timer socket 11 is used to set the power-on frequency and / or power-on duration. The timer socket 11 of this utility model is a mature existing technology. The timer socket 11 can set the power-on frequency and / or power-on duration. The timer socket 11 adopts a timer socket that can be set for seven days a week and eight sets of timer switches (i.e., the power-on frequency is eight times) per day. For example, the eight sets for Monday are 6 o'clock on and 12 o'clock off (i.e., the power-on duration, 6 o'clock on and 12 o'clock off for a total of 5 hours), 2 o'clock on and 5 o'clock off, etc. The eight sets for Tuesday are 5 o'clock on and 11 o'clock off, 1 o'clock on and 5 o'clock off, etc. The seven days of the week can be exactly the same or not exactly the same, and the power-on setting is repeated according to a seven-day week cycle.

[0032] Several light meters 13 are connected to the inside of the light-shielding cover 5. These light meters 13 are positioned at different locations within the cover to detect illuminance at different locations. In this embodiment, the light meters 13 are preferably positioned at the light source location of the adjustable chandelier 9, in the middle of the light-shielding cover 5, and at the bottom of the cover 5. The light meters 13 positioned at the light source location of the adjustable chandelier 9 are used to detect the illuminance at that light source. The light meters 13 positioned in the middle of the light-shielding cover 5 are used to detect the ambient illuminance in the middle area of ​​the cage. The light meters 13 positioned at the bottom of the light-shielding cover 5 are used to detect the ambient illuminance in the bottom area of ​​the cage (which is closer to the illuminance during animal activity). Each light meter 13 is electrically connected to a monitoring display screen 14. The light meters 13 are digital display light meters and can export illuminance data. Each light meter 13 transmits the detected illuminance data to the monitoring display screen 14. In some embodiments, a camera 12 is fixed on the top plate 6 of the light-shielding cover 5. The camera 12 is electrically connected to a timer socket 11 via a power cord B with a power plug B. The timer socket 11 synchronously sets the power-on frequency and / or power-on duration of the adjustable chandelier 9 and the camera 12. Since both the adjustable chandelier 9 and the camera 12 are electrically connected to the timer socket 11, the power switch of the timer socket 11 enables synchronous power-on and power-off operations for the adjustable chandelier 9 and the camera 12. The camera 12 is electrically connected to a monitoring display screen 14, and the video captured by the camera 12 is transmitted to the monitoring display screen 14 in real time for storage and display.

[0033] like Figure 3 , Figure 4 As shown, the light-blocking cloth cover 5 has a door 8 on one side, and the door 8 is composed of two overlapping cloth door portions; preferably, the length of the overlapping portion of the two cloth door portions of the door 8 is a percentage of the total length of the door 8. ~ In this embodiment, Velcro assemblies can be installed at the overlapping portions of the two fabric covers 8 to bond the overlapping portions together.

[0034] In some preferred embodiments, the rectangular light-shielding cavity of the light-shielding cover 5 is 2-5 cm larger than the length, width, and height of the rearing cage 1. See also Figure 1 , Figure 4 The length L of the light-blocking cloth cover 5 is 2-5 cm longer than the length of the breeding cage 1, the width W of the light-blocking cloth cover 5 is 2-5 cm longer than the width of the breeding cage 1, and the height H of the light-blocking cloth cover 5 is 2-5 cm longer than the height of the breeding cage 1.

[0035] In some preferred embodiments, the light regulator 10 has a built-in light recorder for recording the light intensity, and the timer socket 11 has a built-in power-on / off recorder for recording the on / off time, power-on frequency and / or power-on duration. The power-on / off recorder transmits the acquired on / off time, power-on frequency and / or power-on duration to the monitoring display screen 14 for display. The monitoring display screen 14 is connected to the power-on / off recorder of the timer socket 11 and the light recorder of the light regulator 10, respectively, and the light recorder transmits the acquired light intensity to the monitoring display screen 14 for display.

[0036] This embodiment uses mice as experimental subjects. Mice are housed in cages 1, which are covered by a light-blocking cloth 5. A timer socket 11 is set to control the frequency and / or duration of power supply. The timer socket 11 simultaneously controls the power supply to and from the adjustable chandelier 9 and the camera 12. When the adjustable chandelier 9 is on, the camera 12 is also on and recording; when the adjustable chandelier 9 is off, the camera 12 is also off. The illuminance and color of the adjustable chandelier 9 are adjusted by a light regulator 10. A monitoring display screen 14 simultaneously collects the video data from the camera 12 and the illuminance data measured by various light meters 13. Mice are housed in cages 1, and experiments are conducted to study the effects of different light intensities and colors on sleep, growth, development, and reproduction. The relationship between different light intensities and colors and their effects on mouse sleep and growth are investigated. In practical use, the breeding cages 1 of this utility model can be matched with a light-blocking cloth cover 5 of appropriate size to form a set of light-blocking breeding experimental units. Several light-blocking breeding experimental units can be arranged side by side (with a certain distance between them) or stacked one on top of the other to conduct multiple animal lighting studies (such as animal lighting studies of control group and experimental group). The light-blocking cloth cover 5 of this utility model can be sized to cover two or more breeding cages 1, so that two or more breeding cages 1 share a light-blocking cloth cover 5 (for example, when arranged side by side, multiple breeding cages 1 share a light-blocking cloth cover 5 for light blocking treatment, and adjustable pendant lights 9, cameras 12 and other components are arranged at the corresponding positions of each breeding cage 1 on the light-blocking cloth cover 5). Example 1: A mouse light-time model was established using the most commonly used intraperitoneal injection of chlorophenylalanine (PCPA). Sixty male ICR mice were randomly divided into a control group, a model group, a continuous darkness group, a short-light group, a long-light group, and a continuous light group. Except for the control group, the other groups were given intraperitoneal injection of PCPA suspension 450 mg / kg to induce insomnia. The control group received the same dose of 5% sodium bicarbonate saline intraperitoneally daily. During the treatment period, each group had 12 hours of light followed by 12 hours of darkness per day. The effects of the light-time model on the levels of monoamine neurotransmitters and melatonin in the mouse serum were studied. The results are as follows: Figure 6As shown, compared with the control group, the serum 5-HT (5-hydroxytryptamine) level in the model group mice was significantly decreased (P < 0.05), the DA (dopamine) level was significantly increased (P < 0.05), while the MT (melatonin) level remained relatively stable. Compared with the model group, in each light-exposed group, with the increase of light exposure time, the serum 5-HT (5-hydroxytryptamine) and DA (dopamine) levels gradually increased, while the MT (melatonin) level gradually decreased (P < 0.05). Figure 6 In A, the level of 5-HT (i.e., 5-hydroxytryptamine) in mouse serum; Figure 6 In B, the level of DA (dopamine) in mouse serum; Figure 6 In C, the content of MT (melatonin) in mouse serum; compared with the control group, *P<0.05, **P<0.01; compared with the model group, △P<0.05, △△P<0.01.

[0037] Example 2: A study investigating the effect of light exposure on hypothalamic GABA levels in a mouse light exposure model, with results as follows: Figure 7 As shown, Real-time PCR was used to detect 5-HTR1A (i.e., 5-hydroxytryptamine 1A receptor) in the hypothalamus tissue of mice in each group. Compared with the control group, the expression of 5-HTR1A (i.e., 5-hydroxytryptamine 1A receptor) in the model group showed a decreasing trend (P < 0.05); compared with the model group, the expression level gradually decreased with increasing light intensity (P < 0.05). Figure 7 The left figure shows the changes in GABA content (i.e., the content of γ-aminobutyric acid GABA) in the hypothalamus tissue of mice in each group (n=8). Figure 7 The right figure shows the changes in the expression level of 5-HTR1A protein (i.e., 5-hydroxytryptamine 1A receptor) in the hypothalamus tissue of mice in each group (n=3). Example 3: Study on the effect of different light intensities on sleep in insomnia model mice. Experimental animals: 60 male ICR mice, SPF grade, weighing 18-22 g, 5-6 weeks old, with animal weight not exceeding 20% ​​of average body weight. Experimental consumables and reagents: physiological saline, chlorophenylalanine (PCPA), sodium pentobarbital, sodium bicarbonate, 1 ml syringe, timer, mouse gavage needle, 25W special purpose adjustable dimming chandelier, full-light-blocking flame-retardant curtain cover, 24-hour cycle socket smart timer (10A). Experimental method is as follows:

[0038] 1. Establishment and evaluation of the insomnia model in mice: The most commonly used insomnia animal model, PCPA, was used for modeling, starting at 9:00 AM daily. Chlorophenylalanine (PCPA, Sigma) suspension was prepared before use at a dosage of 450 mg / kg. Sodium bicarbonate powder was added to a 0.9% sodium chloride solution to prepare a weakly alkaline 0.9% sodium chloride solution with a pH of 7-8. Then, chlorophenylalanine PCPA was added to prepare a suspension with a concentration of 30 mg / mL. The control group received an intraperitoneal injection of the same volume of weakly alkaline 0.9% sodium chloride solution for 3 consecutive days. Mice received an intraperitoneal injection of PCPA suspension at a dose of [missing value] once daily for 5 consecutive days. After the last injection, the mice were observed for changes in their general condition 30 minutes later. After modeling, 10 mice were randomly selected from the control group and the model group and injected intraperitoneally with sodium pentobarbital 45 mg / kg. The time from the injection of sodium pentobarbital until the disappearance of the righting reflex was recorded as the sleep latency. If a mouse rolled over more than twice within 60 seconds, it was considered that the righting reflex had recovered. The time from the disappearance of the righting reflex until its recovery was recorded as the sleep duration. The sleep latency and sleep duration of the mice were recorded separately, and one-way ANOVA was used to evaluate whether the modeling was successful. Evaluation of the mouse insomnia model: Compared with the control group, the sleep latency of the model group was prolonged and the sleep duration was shortened, with statistically significant differences (P < 0.05), indicating that the PCPA mouse model was successfully established. When the model group mice showed significant behavioral changes such as circadian rhythm disorder, significant decrease in body weight, dry and frizzy fur, increased excitability, and increased aggression, it indicated that the mouse insomnia model was successfully established.

[0039] 2. The grouping method is as follows:

[0040] (1) Lighting treatment: Artificial lighting is used. The light-blocking cloth cover 5 covers the breeding cage 1 to form a breeding environment experimental device. The adjustable pendant light 9 of the breeding environment experimental device is set to 12 hours of light and 12 hours of darkness. The working illuminance is adjusted according to the animal illuminance. The bottom of the rat cage is 25cm away from the light source. After 7 days of acclimatization, 60 mice were randomly divided into a control group (n=10) and a chloramphenicol-induced insomnia model group (n=50), further divided into a model group, a low illuminance group (n=1), a low illuminance group (n=2), a high illuminance group (n=1), and a high illuminance group (n=2), with 10 mice in each group. During the experiment, mice were given 12 hours of light followed by 12 hours of darkness. After modeling, the control and model groups were given a working illuminance of 100 lx and an animal illuminance of 15–20 lx daily. The remaining groups were given working illuminances of 10 lx, 50 lx, 150 lx, and 250 lx, respectively, and animal illuminances of 1–5 lx, 5–10 lx, 25–30 lx, and 35–40 lx, respectively. Light exposure was maintained for one week. The model group was induced using intraperitoneal injection of PCPA, while the control group received the same daily intraperitoneal injection of 5% sodium bicarbonate saline.

[0041] 3. Observation and detection indicators: (1) Weigh each group of mice regularly and observe their general performance, activity, hair, mental state, etc. (2) Comparison of sleep time of each group of mice: sleep latency and continuous sleep time.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An experimental apparatus for animal lighting research, characterized in that: The device includes a timer socket (11), a monitoring display screen (14), a breeding cage (1), and a light-blocking cloth cover (5) that completely covers the outside of the breeding cage (1). The top of the light-blocking cloth cover (5) is a top plate (6). An adjustable chandelier (9) is fixedly installed on the top plate (6) of the light-blocking cloth cover (5). The adjustable chandelier (9) is electrically connected to the timer socket (11) via a power cord A with a power plug A. A light regulator (10) for adjusting the illuminance of the adjustable chandelier (9) is installed on the power cord A. The timer socket (11) is electrically connected to a 220V household AC power supply. The timer socket (11) is used to set the power-on frequency and / or power-on duration. Several photometers (13) are connected to the inside of the light-blocking cloth cover (5). Each photometer (13) is electrically connected to the monitoring display screen (14).

2. The experimental apparatus for animal lighting research according to claim 1, characterized in that: A camera (12) is fixed on the top plate (6) of the light-shielding cover (5). The camera (12) is electrically connected to the timer socket (11) via the power cord B of the power plug B. The timer socket (11) synchronously sets the power frequency and / or power duration of the adjustable chandelier (9) and the camera (12). The camera (12) is electrically connected to the monitoring display screen (14).

3. The experimental apparatus for animal lighting research according to claim 1, characterized in that: The feeding cage (1) is rectangular in shape. All six sides of the feeding cage (1) are connected by cage frame units (2). One side of the feeding cage (1) has a cage opening. The feeding cage (1) is hinged with a cage door (4) to close the cage opening.

4. The experimental apparatus for animal lighting research according to claim 3, characterized in that: The cage frame units (2) on two adjacent sides of the feeding cage (1) are connected and fixed by structural reinforcing columns (3). The cage frame unit (2) consists of a mesh plate (21) and a connecting insert (22) located on the end side of the mesh plate (21). The structural reinforcing column (3) has a slot for interlocking with the connecting insert (22) of the cage frame unit (2).

5. The experimental apparatus for animal lighting research according to claim 3, characterized in that: The light-shielding cloth cover (5) is in the shape of a cuboid. The light-shielding cloth cover (5) has a cuboid light-shielding cavity that can completely accommodate the feeding cage (1). The bottom of the light-shielding cloth cover (5) is the opening (7) of the cuboid light-shielding cavity.

6. The experimental apparatus for animal lighting research according to claim 5, characterized in that: The light-blocking cloth cover (5) has a door (8) on one side, which is composed of two overlapping cloth door sections.

7. The experimental apparatus for animal lighting research according to claim 5, characterized in that: The rectangular shading chamber of the shading cloth cover (5) is 2-5 cm larger than the length, width and height of the feeding cage (1).

8. The experimental apparatus for animal lighting research according to claim 1, characterized in that: The light regulator (10) has a light recorder for recording the light intensity, and the timer socket (11) has a power-on / off recorder for recording the on / off time, power-on frequency and / or power-on duration. The monitoring display screen (14) is connected to the power-on / off recorder of the timer socket (11) and the light recorder of the light regulator (10) respectively.

9. The experimental apparatus for animal lighting research according to claim 6, characterized in that: The length of the overlapping portion of the two fabric covers of the cover (8) is the percentage of the total length of the cover (8):

10. The experimental apparatus for animal lighting research according to claim 1, characterized in that: The light-blocking cloth cover (5) is made of polyester fiber, and the inner and outer surfaces of the polyester fiber of the light-blocking cloth cover (5) are coated with a black glue coating for enhancing light blocking; the top plate (6) of the light-blocking cloth cover (5) is provided with reinforcing steel wire mesh.

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