Rat and mouse model feeding device

Abstract

The utility model discloses a rat and mouse model feeding device, and belongs to the technical field of animal feeding devices. The device solves the problem of how to reduce the probability of biting experimenters by rats and mice when padding is frequently replaced in the prior art, and comprises a first bottom plate and a box body, a second bottom plate is hinged to one side of the first bottom plate, the box body is connected with the first bottom plate and the second bottom plate in a sliding mode, and idler wheels are connected to the first bottom plate in a rolling mode. The wheel faces of the wheels make contact with the inner surface of one side of the box body, the size of the wheels is matched with the size of the first bottom plate, clamping grooves matched with the wheels are formed in the two sides of the box body, the two ends of the wheels are rotationally connected with the clamping grooves, and rolling shafts of the wheels extend out of the clamping grooves and are connected with rotating mechanisms. A limiting mechanism used for limiting sliding of the box body is arranged on the first bottom plate. According to the utility model, the possibility that experimenters are bitten by rats and mice in the process of frequently replacing the padding is reduced, and the safety of experiments is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of animal breeding devices, and in particular relates to a device for breeding rat models. Background Art

[0002] Currently, there are two main types of laboratory mice, rats and mice. The two types of mice are very different in size. The lifespan of laboratory mice is about 18 months, and the lifespan of healthy mice can reach 18-24 months. Laboratory mice in closed groups have stronger reproductive capacity. Some disease model mice have low reproductive capacity and most of them are docile.

[0003] When raising mice and rats, the bedding needs to be changed frequently to keep the cages clean and avoid the occurrence of diseases. However, the specific replacement frequency needs to be considered comprehensively based on factors such as the number of experimental mice, excrement, and degree of dirtiness of the bedding. For example, if the bedding is found to be soaked or there are dead mice, the bedding should be replaced in time. In special cases, such as diabetic mice, the bedding replacement cycle may be shorter, twice a day.

[0004] In the prior art, when replacing the bedding, the rats or mice in the cage need to be taken out manually, and then the bedding in the cage needs to be taken out and new bedding is laid. If the bedding needs to be replaced frequently during this process, it is easy to cause abnormal emotions in the rats and mice, and they may bite the experimenters when the rats and mice are taken out manually. Utility Model Content

[0005] Aiming at the problem of how to reduce the probability of rats biting experimenters when frequently changing bedding in the prior art, the utility model provides a rat model breeding device.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A device for raising rat and mouse models comprises a first bottom plate and a box body with an opening at the bottom, wherein a second bottom plate is hingedly connected to one side of the first bottom plate, the box body is slidably connected to the first bottom plate, and the box body can slide from the first bottom plate to the second bottom plate and is slidably connected to the second bottom plate, a roller is rotatably connected to the first bottom plate, the wheel surface of the roller contacts the inner surface of one side of the box body, the size of the roller matches the size of the first bottom plate, and both sides of the box body are provided with clamping grooves matching with the roller, the two ends of the roller are rotatably connected to the clamping grooves, the roller shaft of the roller extends from the clamping groove and is connected with a rotating mechanism, and a limiting mechanism for limiting the sliding of the box body is provided on the first bottom plate.

[0008] After adopting this technical scheme, the scheme is provided with a first bottom plate and a second bottom plate hinged to each other. When it is necessary to replace the bedding, it is only necessary to rotate the roller or push the box so that the box slides toward the second bottom plate, and at the same time the roller rolls in the box. The rolling of the roller makes the roller walk on the bedding, and the mice and rats in the box are driven away, so that the mice and rats follow the box to move to the second bottom plate, but the bedding remains on the first bottom plate. When the box is completely moved to the second bottom plate, the bedding on the first bottom plate is cleaned and replaced, and then the box is pushed in the opposite direction or the rotating mechanism is rotated in the opposite direction to move the box together with the mice and rats in the box to the first bottom plate without affecting the bedding, thereby effectively avoiding the contact between the experimenter and the mice and rats during the process of replacing the bedding, thereby effectively reducing the possibility of the experimenter being bitten by the mice and rats during the frequent replacement of the bedding, and effectively improving the safety of the experiment. Since the second bottom plate is rotatably connected to the first bottom plate, the second bottom plate can be rotated to the bottom of the first bottom plate after the padding is replaced, so that the first bottom plate and the second bottom plate overlap, thereby storing the second bottom plate to avoid occupying too much experimental space, which is conducive to the experiment.

[0009] Preferably, first baffles are provided on two opposite sides of the first bottom plate, a first slide groove is provided on each of the first baffles, a first side opening is provided on the side of the first slide groove close to the second bottom plate, second baffles are provided on two opposite sides of the second bottom plate, a second slide groove is provided on each of the second baffles, a second side opening is provided on the side of the second slide groove close to the first bottom plate, the first slide groove and the second slide groove are symmetrically arranged, and a sliding plate cooperating with the first slide groove or the second slide groove is fixedly arranged on the box body.

[0010] After adopting this technical solution, baffles are provided on both sides of the first bottom plate and the second bottom plate, and slide grooves are provided on the baffles, and side openings are provided on the sides adjacent to the two slide grooves, so that the sliding plate sliding in the first slide groove or the second slide groove can be smoothly moved to the other slide groove, thereby realizing the sliding of the box on the first bottom plate or the second bottom plate, and can slide from the first bottom plate to the second bottom plate or from the second bottom plate to the first bottom plate.

[0011] Preferably, fixed plates are provided on both sides of the first bottom plate, and rotating shafts are fixedly provided between the two fixed plates and the first bottom plate, and the rotating shafts are rotatably connected with rings, and the rings are fixedly connected with connecting pieces, and the connecting pieces are fixedly connected to the second bottom plate.

[0012] After adopting this technical solution, the rotation connection between the first bottom plate and the second bottom plate is realized through the cooperation of the fixing plate, the rotating shaft, the sleeve ring and the connecting piece.

[0013] Preferably, the limiting mechanism includes two first limiting plates respectively arranged on the side of the two first baffles away from the second bottom plate, and a second limiting plate is rotatably connected around the first side opening to cover the first side opening, and the length of the sliding plate, the length of the first slide groove and the length of the second slide groove are all equal.

[0014] After adopting this technical solution, the first limit plate can be used to prevent the box from detaching from the first limit plate during the sliding process. When the padding is replaced, the second limit plate can be rotated to block the first side opening, thereby limiting the sliding plate to the first slide groove, thereby fixing the position of the box.

[0015] Preferably, a third limiting plate is provided on one side of the two second baffles away from the first baffle.

[0016] After adopting this technical solution, the third limiting plate can ensure that the box body will not separate from the second bottom plate when sliding onto the second bottom plate, thereby ensuring the stability of the breeding device.

[0017] Preferably, a first extension plate is provided on the box body at a position corresponding to the gap between the two first limit plates, and two ends of the first extension plate are respectively in contact with the two first limit plates, there is a gap between the first extension plate and the first bottom plate, and the height of the gap between the first extension plate and the first bottom plate is greater than the height of the padding, and a second extension plate is provided on the opposite side of the box body to the first extension plate, and two ends of the second extension plate are respectively in contact with the first baffle plate and the second baffle plate.

[0018] After adopting this technical solution, the height of the gap between the first extension plate and the first bottom plate is greater than the height of the padding, which can prevent the first extension plate from scratching the padding when the box moves toward the second bottom plate, thereby bringing the padding together with the rats and mice to the second bottom plate. The first extension plate and the second extension plate ensure the enclosure of the box and prevent the rats and mice from escaping.

[0019] Preferably, the edges of the first extension plate and the second extension plate are both covered with a silicone layer.

[0020] After adopting this technical solution, the friction between the box body and the baffle or the limit plate can be increased through the silica gel layer, thereby enhancing the stability of the breeding device.

[0021] Preferably, limiting wheels are provided at both ends of the roller shaft of the roller corresponding to the first slide groove, the limiting wheel is fixedly sleeved on the roller shaft, and the limiting wheel is clamped in the first slide groove or the second slide groove.

[0022] After adopting this technical solution, the stability of the rotating roller during rolling can be improved by cooperating with the limiting wheel and the first slide groove or the second slide groove, thereby ensuring smooth and stable rolling of the roller.

[0023] Preferably, the box body comprises a main body, a box cover is hinged on the top of the main body, and a plurality of strip openings are arranged on the box cover.

[0024] After adopting this technical solution, the box cover is set on the top of the box body, and the status of the rats can be observed through the strip opening. The main body is closed on all sides, making it difficult for the rats to see passers-by, which can improve the emotional stability of the rats.

[0025] Preferably, the limiting mechanism comprises a first fixing belt and a second fixing belt respectively arranged on both sides of the first bottom plate, and the first fixing belt and the second fixing belt are detachably connected.

[0026] After adopting this technical solution, the box body can be further fixed by the first fixing belt and the second fixing belt to ensure the stability of the breeding device during breeding.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0028] 1. The utility model is provided with a first bottom plate and a second bottom plate hinged to each other. When it is necessary to replace the bedding, it is only necessary to rotate the roller or push the box body so that the box body slides toward the second bottom plate, and at the same time the roller rolls in the box body. The rolling of the roller makes the roller walk on the bedding, and the mice in the box body are driven away, so that the mice follow the box body to move to the second bottom plate, but the bedding remains on the first bottom plate. When the box body is completely moved to the second bottom plate, the bedding on the first bottom plate is cleaned and replaced, and then the box body is pushed in the opposite direction or the rotating mechanism is rotated in the opposite direction to move the box body together with the mice in the box body to the first bottom plate without affecting the bedding, thereby effectively avoiding the contact between the experimenter and the mice during the process of replacing the bedding, thereby effectively reducing the possibility of the experimenter being bitten by the mice during the frequent replacement of the bedding, and effectively improving the safety of the experiment.

[0029] 2. In the utility model, since the second bottom plate is rotatably connected to the first bottom plate, the second bottom plate can be rotated to the bottom of the first bottom plate after the padding is replaced, so that the first bottom plate and the second bottom plate overlap, thereby storing the second bottom plate to avoid occupying too much experimental space, which is conducive to the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0031] Figure 1 is a schematic structural diagram of the second bottom plate in Example 1 when it is not unfolded;

[0032] Figure 2 is a schematic diagram of the structure when the second bottom plate in Example 1 is unfolded;

[0033] Figure 3 is a schematic structural diagram of the limiting mechanism in Example 1;

[0034] Figure 4 is a schematic diagram of the structure of the roller, the first bottom plate and the second bottom plate in Example 1;

[0035] Figure 5 is a schematic diagram of the structure of the first fixing belt and the second fixing belt in Example 2;

[0036] Among them: 1-main body, 2-box cover, 3-first bottom plate, 4-second bottom plate, 5-rotating shaft, 6-connecting piece, 7-first slide groove, 8-limiting wheel, 9-rotating mechanism, 10-roller, 11-second limiting plate, 12-first limiting plate, 13-roller, 14-first fixing belt, 15-second fixing belt, 16-second slide groove. DETAILED DESCRIPTION

[0037] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0038] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] Combine the following Figure 1-Figure 5 The utility model is described in detail.

[0040] Example 1

[0041] like Figure 1-4The invention discloses a device for raising rat and mouse models, comprising a first bottom plate 3 and a box body with an opening at the bottom, wherein a second bottom plate 4 is hingedly connected to one side of the first bottom plate 3, the box body is slidably connected to the first bottom plate 3, and the box body can slide from the first bottom plate 3 to the second bottom plate 4 and is slidably connected to the second bottom plate 4, a roller 13 is rollingly connected to the first bottom plate 3, the wheel surface of the roller 13 contacts the inner surface of one side of the box body, the size of the roller 13 matches the size of the first bottom plate 3, and both sides of the box body are provided with snap-fitting grooves matching with the roller 13, the two ends of the roller 13 are rotatably connected to the snap-fitting grooves, the roller shaft 10 of the roller 13 extends out from the snap-fitting grooves, and is connected with a rotating mechanism 9, and a limiting mechanism for limiting the sliding of the box body is provided on the first bottom plate 3.

[0042] In this embodiment, first baffles are provided on both sides of the first bottom plate 3, and a first slide groove 7 is provided on each of the first baffles. A first side opening is provided on the side of the first slide groove 7 close to the second bottom plate 4, and a second baffle is provided on both sides of the second bottom plate 4, and a second slide groove 16 is provided on each of the second baffles. A second side opening is provided on the side of the second slide groove 16 close to the first bottom plate 3, and the first slide groove 7 and the second slide groove 16 are symmetrically arranged. A sliding plate that cooperates with the first slide groove 7 or the second slide groove 16 is fixedly arranged on the box body. Baffles are provided on both sides of the first bottom plate 3 and the second bottom plate 4, and slide grooves are provided on the baffles. Side openings are provided on the sides adjacent to the two slide grooves, so that the sliding plate sliding in the first slide groove or the second slide groove can be smoothly moved to the other slide groove, so that the box body can slide on the first bottom plate 3 or the second bottom plate 4, and can slide from the first bottom plate 3 to the second bottom plate 4 or from the second bottom plate 4 to the first bottom plate 3.

[0043] In this embodiment, the side wall of the roller 13 is in contact with the first baffle or the second baffle. This can prevent the large rats and mice from hiding in the gap between the roller 13 and the first baffle or the second baffle and causing damage to the large rats and mice when the roller 13 rotates. In this embodiment, the height of the roller 13 is higher than the height of the first baffle and the second baffle, and the diameter of the roller is 4 times the height of the padding.

[0044] In this embodiment, the weight of the roller 13 is greater than the weight of the box, and greater than the weight of the mice raised by the breeding device, so as to ensure that the box can be moved when the roller 13 rotates.

[0045] In this embodiment, the rotating mechanism 9 is a handle connected to the roller. In other embodiments, the rotating mechanism 9 may also be a mechanism such as a knob that is convenient for driving the roller to rotate.

[0046] In this embodiment, the sizes of the box, the first bottom plate 3 and the second bottom plate 4 are set according to the sizes of the mice to be raised, and a variety of models can be provided to meet the requirements for raising mice of different sizes.

[0047] In this embodiment, fixed plates are provided on both sides of the first bottom plate 3, and rotating shafts 5 are fixedly provided between the two fixed plates and the first bottom plate 3, and collars are rotatably connected to the rotating shafts 5, and the collars are fixedly connected to connecting members 6, and the connecting members 6 are fixedly connected to the second bottom plate 4. The first bottom plate 3 and the second bottom plate 4 are rotatably connected by the cooperation of the fixed plates, the rotating shafts 5, the collars and the connecting members 6.

[0048] In this embodiment, the limiting mechanism includes two first limiting plates 12 respectively arranged on the side of the two first baffles away from the second bottom plate 4, and the second limiting plate 11 is rotatably connected around the first side opening to block the first side opening. The length of the sliding plate, the length of the first slide groove 7 and the length of the second slide groove 16 are all equal. The first limiting plate 12 can prevent the box from detaching from the first bottom plate 3 during the sliding process. When the padding is replaced, the second limiting plate 11 can be rotated to block the first side opening, so that the sliding plate is confined to the first slide groove 7, thereby fixing the position of the box. Figure 3 As shown, in this embodiment, a horizontal axis is fixedly provided on the fixing plate, and the second limiting plate 11 is rotatably connected to the horizontal axis.

[0049] In this embodiment, a third limit plate is provided on one side of the two second baffles away from the first baffle. The third limit plate can ensure that the box body will not separate from the second bottom plate 4 when sliding onto the second bottom plate, thereby ensuring the stability of the breeding device.

[0050] In this embodiment, a first extension plate is provided on the box body at a position corresponding to the gap between the two first limit plates 12, and the two ends of the first extension plate are in contact with the two first limit plates 12 respectively. There is a gap between the first extension plate and the first bottom plate 3, and the height of the gap between the first extension plate and the first bottom plate 3 is greater than the height of the padding. A second extension plate is provided on the opposite side of the box body where the first extension plate is provided, and the two ends of the second extension plate are in contact with the first baffle plate and the second baffle plate respectively. The height of the gap between the first extension plate and the first bottom plate is greater than the height of the padding to prevent the first extension plate from scratching the padding when the box body moves toward the second bottom plate 4, thereby bringing the padding together with the rats and mice to the second bottom plate 4. The provision of the first extension plate and the second extension plate ensures the closedness of the box body and prevents the rats and mice from escaping.

[0051] In this embodiment, the box body includes a main body 1, and a box cover 2 is hinged on the top of the main body 1. The box cover 2 is provided with a plurality of strip openings. The box cover is arranged on the top of the box body, and the state of the rat can be observed through the strip openings. The four sides of the main body are closed, so that the rat is not easy to see the passing people, which can improve the emotional stability of the rat.

[0052] The specific use method of the utility model is as follows:

[0053] Reference Figure 1-Figure 4 When the padding needs to be replaced, the first bottom plate 3 is lifted together with the box body, and the second bottom plate 4 is rotated to be level with the first bottom plate 3, and then the first bottom plate 3 and the second bottom plate 4 are placed on the table, and then the handle is rotated to make the roller 13 roll on the first bottom plate 3, so as to push the box body forward and drive the mice in the box body to move onto the second bottom plate 4. Since the height of the roller 13 is higher than the height of the padding, the roller 13 can roll smoothly on the padding, so as to achieve the technical effect of leaving the padding on the first bottom plate 3; when the box body is completely moved to the second bottom plate 4, as shown in FIG. Figure 2 As shown, the padding on the first bottom plate 3 is cleaned and replaced, and then the roller 13 is rotated in the opposite direction to make the box, the roller 13 and the mouse and the large mouse return to the first bottom plate 3, and then the second bottom plate 4 is cleaned and rotated again to make the second bottom plate 4 rotate to overlap with the first bottom plate 3, and then the second limiting plate 11 is rotated to limit the box to the first bottom plate 3.

[0054] Example 2

[0055] like Figure 5 As shown, the limiting mechanism also includes a first fixing belt 14 and a second fixing belt 15 respectively arranged on both sides of the first bottom plate 3, and the first fixing belt 14 and the second fixing belt 15 are detachably connected. In this embodiment, the detachable connection is achieved by the fleece Velcro and the surface Velcro respectively arranged on the first fixing belt 14 and the second fixing belt 15. The box body can be further fixed by the first fixing belt 14 and the second fixing belt 15 to ensure the stability of the feeding device during feeding.

[0056] Example 3

[0057] This embodiment is basically the same as the embodiment 2, except that the edges of the first extension plate and the second extension plate are coated with a silicone layer. The silicone layer can increase the friction between the box body and the baffle or the limit plate, thereby enhancing the stability of the feeding device. The silicone layer and the first fixing belt 14 and the second fixing belt 15 can make the end faces of the second extension plate abut against the first bottom plate 3, thereby improving the sealing performance.

[0058] Example 4

[0059] This embodiment is basically the same as Embodiment 1, 2 or 3, except that: in this embodiment, the two ends of the roller shaft 10 of the roller 13 are provided with limiting wheels 8 corresponding to the first slide groove 7, the limiting wheels 8 are fixedly sleeved on the roller shaft 10, and the limiting wheels 8 are clamped in the first slide groove 7 or the second slide groove 16. The limiting wheels 8 cooperate with the first slide groove 7 or the second slide groove 16 to improve the stability of the roller 13 when rotating, and ensure that the roller 13 rolls smoothly and stably.

[0060] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A device for raising rat models, characterized in that: The invention relates to a box body having a first bottom plate (3) and an opening at the bottom, wherein a second bottom plate (4) is hingedly connected to one side of the first bottom plate (3), the box body is slidably connected to the first bottom plate (3), and the box body can slide from the first bottom plate (3) to the second bottom plate (4) and be slidably connected to the second bottom plate (4), a roller (13) is rotatably connected to the first bottom plate (3), the wheel surface of the roller (13) contacts the inner surface of one side of the box body, the size of the roller (13) matches the size of the first bottom plate (3), and two sides of the box body are provided with clamping grooves matching with the roller (13), the two ends of the roller (13) are rotatably connected to the clamping grooves, the roller shaft (10) of the roller (13) extends from the clamping groove and is connected to a rotating mechanism (9), and a limiting mechanism for limiting the sliding of the box body is provided on the first bottom plate (3).

2. The rat model breeding device according to claim 1, characterized in that: The first bottom plate (3) is provided with first baffles on two opposite sides thereof, each of which is provided with a first slide groove (7), and a first side opening is provided on the first slide groove (7) on a side close to the second bottom plate (4), and the second bottom plate (4) is provided with second baffles on two opposite sides thereof, each of which is provided with a second slide groove (16), and a second side opening is provided on the side close to the first bottom plate (3), the first slide groove (7) and the second slide groove (16) are symmetrically arranged, and a sliding plate cooperating with the first slide groove (7) or the second slide groove (16) is fixedly arranged on the box body.

3. The rat model breeding device according to claim 2, characterized in that: Fixed plates are arranged on both sides of the first bottom plate (3), and rotating shafts (5) are fixedly arranged between the two fixed plates and the first bottom plate (3), and sleeves are rotatably connected to the rotating shafts (5), and the sleeves are fixedly connected to connecting members (6), and the connecting members (6) are fixedly connected to the second bottom plate (4).

4. The rat model breeding device according to claim 2, characterized in that: The limiting mechanism comprises two first limiting plates (12) respectively arranged on one side of the two first baffles away from the second bottom plate (4); a second limiting plate (11) is rotatably connected around the first side opening and can cover the first side opening; the length of the sliding plate, the length of the first sliding groove (7) and the length of the second sliding groove (16) are all equal.

5. The rat model breeding device according to claim 4, characterized in that: A third limiting plate is disposed on one side of the two second baffles away from the first baffle.

6. The rat model breeding device according to claim 4, characterized in that: A first extension plate is provided on the box body at a position corresponding to the gap between the two first limit plates (12), and two ends of the first extension plate are respectively in contact with the two first limit plates (12), a gap exists between the first extension plate and the first bottom plate (3), and the height of the gap between the first extension plate and the first bottom plate (3) is greater than the height of the cushion material, and a second extension plate is provided on the side of the box body opposite to the first extension plate, and two ends of the second extension plate are respectively in contact with the first baffle plate and the second baffle plate.

7. The rat model breeding device according to claim 6, characterized in that: The edges of the first extension plate and the second extension plate are both covered with a silicone layer.

8. The rat model breeding device according to any one of claims 2 to 7, characterized in that: Limiting wheels (8) are arranged at both ends of the roller shaft (10) of the roller (13) corresponding to the first slide groove (7); the limiting wheels (8) are fixedly sleeved on the roller shaft (10), and the limiting wheels (8) are clamped in the first slide groove (7) or the second slide groove (16).

9. The rat model breeding device according to any one of claims 1 to 7, characterized in that: The box body comprises a main body (1), a box cover (2) is hinged on the top of the main body (1), and a plurality of strip-shaped openings are arranged on the box cover (2).

10. The rat model breeding device according to any one of claims 1 to 7, characterized in that: The limiting mechanism comprises a first fixing belt (14) and a second fixing belt (15) which are respectively arranged on both sides of the first bottom plate (3); the first fixing belt (14) and the second fixing belt (15) are detachably connected.

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