Glass cover plate cleaning system

Abstract

The utility model relates to a glass cover plate cleaning system which comprises an ultrasonic medicament soaking tank, a spray rinsing tank, an ultrasonic rinsing tank, a tunnel furnace drying device and a transmission device which are sequentially arranged, the transmission devices are arranged in the ultrasonic medicament soaking tank, the spraying rinsing tank, the ultrasonic water washing tank and the tunnel furnace drying device are provided with the transmission devices, the ultrasonic medicament soaking tank and the ultrasonic water washing tank are provided with ultrasonic generators, and compressed air pipelines are mounted at the bottoms of the ultrasonic medicament soaking tank and the ultrasonic water washing tank. The glass cover plate cleaning system further comprises a hollowed-out frame basket used for containing the glass cover plate, and the conveying device is used for conveying the hollowed-out frame basket. According to the cleaning device, the technical problem that the appearance quality of the glass cover plate is affected due to the fact that frame marks are easily generated in the cleaning process of the existing glass cover plate can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass production and manufacturing, in particular to a glass cover cleaning system. Background Art

[0002] Glass cover plates are being used in a wider range of applications, including mobile communication devices, industrial control displays, car central control, smart wearables, etc. As glass cover plates appear more and more in our daily lives, customers have higher and higher requirements for the cleanliness, decorative aesthetics, and other quality of glass cover plates.

[0003] However, in the prior art, when glass is placed in batches into a cleaning rack and the cleaning rack is placed in a tank-type ultrasonic cleaning machine for cleaning, due to the strong vibration friction of the ultrasonic wave and the direct impact of the cleaning liquid, residual marks "rack marks" are easily generated at the contact points between the vertical position of the glass cover and the cleaning rack, affecting the appearance quality and sales prospects of the glass cover. Utility Model Content

[0004] The utility model provides a glass cover cleaning system to solve the technical problem that shelf marks are easily generated on existing glass cover plates during cleaning, which affects the appearance quality of the glass cover plates.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A glass cover cleaning system includes an ultrasonic agent soaking tank, a spray rinsing tank, an ultrasonic water washing tank, a tunnel furnace drying device and a transmission device arranged in sequence. The transmission devices are all arranged in the ultrasonic agent soaking tank, the spray rinsing tank, the ultrasonic water washing tank and the tunnel furnace drying device. The ultrasonic agent soaking tank and the ultrasonic water washing tank are both provided with an ultrasonic generator, and a compressed air pipeline is installed at the bottom of each tank. The glass cover cleaning system also includes a hollow rack basket for placing the glass cover, and the transmission device is used to transport the hollow rack basket.

[0007] The beneficial effects of the utility model are as follows: when cleaning, the glass cover plate is placed in the hollow frame basket, and then the hollow frame basket with the glass cover plate placed therein is hoisted in the ultrasonic agent immersion tank for immersion cleaning, and ultrasonic cleaning is performed by an ultrasonic generator. At the same time, bubbles are generated in the compressed air pipeline. After the immersion cleaning is completed, it is transmitted to the spray rinsing tank through the transmission device for spray cleaning, and then ultrasonic water washing is performed in the ultrasonic water washing tank in turn, and then dried in the tunnel furnace drying device. The glass cover plate is cleaned by utilizing ultrasonic cleaning, bubble generation in the compressed air pipeline, water washing and drying, and the technical problem of shelf marks easily generated on the glass cover plate during the cleaning process, which affects the appearance quality of the glass cover plate, is reduced.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, a slow-pull water washing device is installed between the ultrasonic water washing tank and the tunnel furnace drying device, and the transmission device is also arranged on the slow-pull water washing device.

[0010] The beneficial effect of adopting the above further solution is: by washing in the slow-pull water washing device, the glass cover plate is further cleaned of dirt, ensuring the neatness after subsequent drying in the tunnel furnace drying device.

[0011] Furthermore, the ultrasonic chemical soaking tank, the ultrasonic water washing tank and the slow-pull water washing device are all provided with a heating device.

[0012] The beneficial effect of adopting the above further solution is: the liquid temperature is increased by the heating device, thereby improving the cleaning effect.

[0013] Furthermore, the transmission device includes a plurality of cranes evenly distributed in the ultrasonic chemical soaking tank, the spray rinsing tank, the ultrasonic water washing tank and the slow-pull water washing device, and a conveyor chain installed in the tunnel furnace drying device.

[0014] The beneficial effect of adopting the above further scheme is: the lifting and lowering operations of the hollow frame basket are realized by a crane, and the hollow frame basket for drying in the tunnel furnace drying device is transported by a conveyor chain until it is transported out of the tunnel furnace drying device.

[0015] Furthermore, the hollow frame basket includes a mother basket and at least one cleaning basket placed in the mother basket, and both the mother basket and the cleaning basket are upper opening structures.

[0016] The beneficial effect of adopting the above further solution is that multiple cleaning baskets can be placed simultaneously through the mother basket, and the glass cover plates can be placed in the cleaning baskets to achieve batch cleaning operations on the glass cover plates.

[0017] Furthermore, the cleaning basket includes a cleaning frame with an upper opening structure, a plurality of U-shaped frames installed in the cleaning frame, and a plurality of support members evenly distributed on both sides of the U-shaped frames and inside the closed end, and the support members are provided with V-shaped grooves.

[0018] The beneficial effect of adopting the above-mentioned further solution is: the glass cover plate is placed in the U-shaped frame from top to bottom, and the glass cover plate is supported by multiple support members, and the side of the glass cover plate abuts against the V-shaped groove to form a line contact, which can reduce the problem of shelf marks caused by surface contact during the cleaning process.

[0019] Furthermore, the support member includes a support base installed on the U-shaped frame and a support shaft with both ends rotatably connected to the support base, and the V-shaped groove is formed on the outer side of the middle end of the support shaft.

[0020] The beneficial effect of adopting the above further solution is that when the glass cover is placed in or removed from the U-shaped frame, the support shaft clamps and limits the glass cover, and at the same time, the support shaft rotates to prevent friction damage to the glass cover.

[0021] Furthermore, a slot is provided on the inner side of the closed end of the U-shaped frame, and part of the support members are adapted to and slidably connected to the slot.

[0022] The beneficial effect of adopting the above further solution is that the position of the support member is adjusted by sliding the support member, thereby changing the support position of the glass cover.

[0023] Furthermore, the cleaning frame is provided with a plurality of slide grooves, and the U-shaped frame is detachably connected to a plurality of sliders, one end of which is adapted to and slidably connected to the slide grooves.

[0024] The beneficial effects of adopting the above further solution are: the U-shaped frame is installed by slidingly connecting the slider to the slide groove, and the spacing between two adjacent U-shaped frames can be changed.

[0025] Furthermore, the U-shaped frame is provided with a through hole, the other end of the slider is inserted into the through hole, the other end of the slider is detachably connected to a fastener, and the fastener is also detachably connected to the U-shaped frame.

[0026] The beneficial effect of adopting the above further solution is that the slider can be taken out by removing the fastener, so that the slider is separated from the cleaning frame, and the U-shaped frame can be taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a flow chart of the glass cover cleaning system of the present invention;

[0028] Figure 2 This is a first partial structural diagram of the glass cover cleaning system of the present invention;

[0029] Figure 3 This is a second partial structural diagram of the glass cover cleaning system of the present invention;

[0030] Figure 4 This is a top view of the ultrasonic medicine soaking tank body of the utility model;

[0031] Figure 5 This is a structural diagram of the hollow basket of the utility model;

[0032] Figure 6This is a structural diagram of the cleaning basket of the present utility model;

[0033] Figure 7 It is a partial enlarged view of the cleaning basket of the present invention.

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1. Ultrasonic chemical soaking tank;

[0036] 2. Spray rinsing tank;

[0037] 3. Ultrasonic water washing tank; 31. Slow pull water washing device;

[0038] 4. Tunnel furnace drying device;

[0039] 5. Transmission device; 51. Crane; 52. Conveyor chain;

[0040] 6. Compressed air pipeline;

[0041] 7. Mother basket;

[0042] 8. Cleaning basket; 81. Cleaning frame; 811. Slide; 82. U-shaped frame; 821. Slot; 822. Slider; 823. Fastener; 83. Support member; 831. Support seat; 832. Support shaft; 84. V-shaped groove. DETAILED DESCRIPTION

[0043] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0044] Example 1

[0045] like Figures 1 to 7 A glass cover cleaning system includes an ultrasonic agent soaking tank 1, a spray rinsing tank 2, an ultrasonic water washing tank 3, a tunnel furnace drying device 4 and a transmission device 5 arranged in sequence. The transmission device 5 is arranged in the ultrasonic agent soaking tank 1, the spray rinsing tank 2, the ultrasonic water washing tank 3 and the tunnel furnace drying device 4. The transmission device 5 is provided. The ultrasonic agent soaking tank 1 and the ultrasonic water washing tank 3 are both provided with an ultrasonic generator, and a compressed air pipe 6 is installed at the bottom of the tank. The glass cover cleaning system also includes a hollow rack basket for placing the glass cover, and the transmission device 5 is used to transport the hollow rack basket.

[0046] The beneficial effects of this embodiment are as follows: during cleaning, the glass cover plate is placed in a hollow frame basket, and then the hollow frame basket with the glass cover plate is hoisted in an ultrasonic agent soaking tank 1 for soaking and cleaning, and ultrasonic cleaning is performed by an ultrasonic generator. At the same time, the compressed air pipe 6 generates bubbles. After the soaking and cleaning is completed, it is transmitted to the spray rinsing tank 2 through the transmission device 5 for spray cleaning. Thereafter, ultrasonic water washing is performed in the ultrasonic water washing tank 3 in turn, and dried in the tunnel furnace drying device 4. The glass cover plate is cleaned by utilizing ultrasonic cleaning, bubble generation by the compressed air pipe 6, water washing and drying, and the technical problem of shelf marks easily generated on the glass cover plate during the cleaning process, which affects the appearance quality of the glass cover plate, is reduced.

[0047] At the same time, during the water washing process in the ultrasonic water washing tank 3, ultrasonic cleaning can be performed by an ultrasonic generator, and bubbles can be generated by the compressed air pipe 6. When bubbles are generated from bottom to top at the bottom of the tank, the ultrasonic wave can be used to bring out the bubbles precipitated in the liquid and offset the slight vibration of the glass caused by the ultrasonic wave itself, thereby reducing the possibility of shelf marks on the glass cover.

[0048] By adopting the above solution, the cleaning operation of the glass cover plates can be carried out in batches, thereby improving the cleaning efficiency; and the residual marks "shelf marks" produced on the glass cover plates during the cleaning process can be effectively reduced, thereby improving the quality after cleaning; at the same time, the situation of incomplete cleaning can be effectively reduced, thereby improving the cleaning quality.

[0049] As a specific solution of the above embodiment, the hollow frame basket is made of a material that is not corroded by acid and alkali cleaning agents, and its general capacity is 25 pieces.

[0050] During the cleaning process, a trolley is used to push the hollow frame basket to the loading area to be cleaned, and the entire hollow frame basket is hoisted into the ultrasonic agent soaking tank 1.

[0051] The entire cleaning system consists of four ultrasonic chemical soaking tanks (1), one spray rinsing tank (2), five ultrasonic water washing tanks (3), and a tunnel oven drying device (4) with three drying positions and multiple heaters for drying. A downward spray pipe is installed at the notch of the spray rinsing tank (2) to spray the glass cover.

[0052] Example 2

[0053] like Figures 1 to 3 On the basis of Example 1, a slow-pull water washing device 31 is installed between the ultrasonic water washing tank 3 and the tunnel furnace drying device 4, and the transmission device 5 is also provided in the slow-pull water washing device 31.

[0054] The beneficial effect of adopting the preferred solution in the above embodiment is that the glass cover plate is further cleaned of dirt by washing in the slow-pull water washing device 31, thereby ensuring the cleanliness after subsequent drying in the tunnel furnace drying device 4.

[0055] Furthermore, the transmission speed of the transmission device 5 in the slow-pull water washing device 31 is slower than the transmission speed of the transmission device 5 in the ultrasonic water washing tank 3 to ensure thorough cleaning.

[0056] Example 3

[0057] On the basis of Examples 1 and 2, the ultrasonic chemical soaking tank 1, the ultrasonic water washing tank 3 and the slow-pull water washing device 31 are all provided with a heating device.

[0058] The beneficial effect of adopting the preferred solution in the above embodiment is that the temperature of the liquid is increased by the heating device, thereby improving the cleaning effect.

[0059] Moreover, the water washing temperature of the ultrasonic water washing tank 3 is lower than that of the slow-pull water washing device 31 , which can form a preheating effect on the glass cover plate and ensure the subsequent water washing and cleaning effect of the slow-pull water washing device 31 .

[0060] As a specific solution of the above embodiment, the heating device can be selected from different types of equipment such as electric heating pipes, steam heating systems or high-temperature air energy heat pump water heaters.

[0061] Example 4

[0062] like Figures 1 to 3 Based on Examples 1-3, the transmission device 5 includes a plurality of cranes 51 evenly distributed in the ultrasonic agent soaking tank 1, the spray rinsing tank 2, the ultrasonic water washing tank 3 and the slow-pull water washing device 31, and a conveyor chain 52 installed in the tunnel furnace drying device 4.

[0063] The beneficial effect of adopting the preferred scheme in the above embodiment is that the lifting and lowering operations of the hollow frame basket are realized by the crane 51, and the hollow frame basket located in the tunnel furnace drying device 4 for drying operations is transported by the conveyor chain 52 until it is transported out of the tunnel furnace drying device 4.

[0064] The number of the plurality of cranes 51 may be four, five, six, or the like.

[0065] Based on the above embodiment, the transmission device also includes a slide rail, which extends along the arrangement direction of the ultrasonic chemical immersion tank 1, the spray rinsing tank 2, the ultrasonic water washing tank 3 and the slow-pull water washing device 31. The crane 51 is slidably installed on the slide rail so that the hollow frame basket can be placed in the ultrasonic chemical immersion tank 1 at different positions through the crane 51.

[0066] Example 5

[0067] like Figures 5 to 7 On the basis of embodiments 1-4, the hollow frame basket includes a mother basket 7 and at least one cleaning basket 8 placed in the mother basket 7, and both the mother basket 7 and the cleaning basket 8 are upper opening structures.

[0068] The beneficial effect of adopting the preferred solution in the above embodiment is that a plurality of cleaning baskets 8 can be placed simultaneously through the mother basket 7, and the glass cover plates can be placed in the cleaning baskets 8 to achieve batch cleaning operations on the glass cover plates.

[0069] Among them, both the mother basket 7 and the cleaning basket 8 can be made of materials that are not corroded by acid and alkali cleaning agents, and 1-3 cleaning baskets 8 can be placed in the mother basket 7 at one time.

[0070] Both the mother basket 7 and the cleaning basket 8 are upper opening structures, and lifting ears are fixed at the upper openings of both to facilitate the lifting operation of the mother basket 7 and the cleaning basket 8.

[0071] Example 6

[0072] like Figures 5 to 7 On the basis of Examples 1-5, the cleaning basket 8 includes a cleaning frame 81 with an upper opening structure, a plurality of U-shaped frames 82 installed in the cleaning frame 81, and a plurality of support members 83 evenly distributed on both sides of the U-shaped frames 82 and the inner side of the closed end, and the support members 83 are provided with V-shaped grooves 84.

[0073] The beneficial effect of adopting the preferred solution in the above embodiment is that the glass cover plate is placed in the U-shaped frame 82 from top to bottom, and the glass cover plate is supported by multiple support members 83, and the side of the glass cover plate abuts against the V-shaped groove 84 to form a line contact, which can reduce the problem of shelf marks caused by surface contact during the cleaning process.

[0074] As a specific solution of the above embodiment, the U-shaped frame 82 is "U"-shaped, and its closed end and open end arms form a three-sided structure, and at least three support members 83 are respectively provided on the three sides to form a stable support and limit for the glass cover.

[0075] Example 7

[0076] like Figures 5 to 7 Based on Examples 1-6, the support member 83 includes a support base 831 mounted on the U-shaped frame 82 and a support shaft 832 rotatably connected to the support base 831 at both ends, and a V-shaped groove 84 is formed on the outer side of the middle end of the support shaft 832.

[0077] The beneficial effect of adopting the preferred solution in the above embodiment is that when the glass cover is placed in or removed from the U-shaped frame 82, the support shaft 832 forms a clamping and limiting effect on the glass cover. At the same time, the support shaft 832 rotates to prevent friction damage to the glass cover.

[0078] Example 8

[0079] like Figures 5 to 7 On the basis of Examples 1-7, a slot 821 is provided on the inner side of the closed end of the U-shaped frame 82 , and part of the support member 83 is adapted and slidably connected to the slot 821 .

[0080] The beneficial effect of adopting the preferred solution in the above embodiment is that the position of the glass cover plate can be changed by adjusting the position of the supporting member 83 by sliding the supporting member 83 .

[0081] The slot 821 may be a U-shaped slot, a stepped slot, a dovetail slot, or the like.

[0082] Example 9

[0083] like Figures 5 to 7 On the basis of embodiments 1-8, the cleaning frame 81 is provided with a plurality of slide grooves 811 , and the U-shaped frame 82 is detachably connected with a plurality of sliders 822 whose one end is adapted to and slidably connected to the slide grooves 811 .

[0084] The beneficial effect of adopting the preferred solution in the above embodiment is that the U-shaped frame 82 is installed by sliding the slider 822 to the slide groove 811, and the distance between two adjacent U-shaped frames 82 is changed.

[0085] The sliding groove 811 is a U-shaped groove and extends along the thickness direction of the glass cover.

[0086] The slider 822 is detachably connected to the two arms of the open end of the U-shaped frame 82 .

[0087] Example 10

[0088] like Figures 5 to 7 On the basis of Examples 1-9, the U-shaped frame 82 is provided with a through hole, the other end of the slider 822 is inserted into the through hole, the other end of the slider 822 is detachably connected to a fastener 823, and the fastener 823 is also detachably connected to the U-shaped frame 82.

[0089] The beneficial effect of adopting the preferred solution in the above embodiment is that the slider 822 can be taken out by removing the fastener 823, so that the slider 822 is separated from the cleaning frame 81, and the U-shaped frame 82 is taken out.

[0090] As a specific solution of the above embodiment, through holes are provided at both arms of the open end of the U-shaped frame 82 and are stepped holes. The other end of the slider 822 is in a T-shaped structure adapted to the through holes.

[0091] The fastener 823 may be a screw.

[0092] During installation, one end of the slider 822 is first inserted into the through hole until the other end (T-shaped end) of the slider 822 abuts against the U-shaped frame 82 , and then the slider 822 and the U-shaped frame 82 are fixed simultaneously by the fastener 823 .

[0093] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation to the present invention.

[0094] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0095] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0096] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0098] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A glass cover cleaning system, characterized in that: The invention comprises an ultrasonic agent soaking tank (1), a spray rinsing tank (2), an ultrasonic water washing tank (3), a tunnel oven drying device (4) and a transmission device (5) which are arranged in sequence. The transmission device (5) is arranged in the ultrasonic agent soaking tank (1), the spray rinsing tank (2), the ultrasonic water washing tank (3) and the tunnel oven drying device (4). The ultrasonic agent soaking tank (1) and the ultrasonic water washing tank (3) are both provided with ultrasonic generators, and compressed air pipes (6) are installed at the bottom of the tanks. The glass cover cleaning system also includes a hollow rack basket for placing the glass cover, and the transmission device (5) is used to transport the hollow rack basket. A slow-pull water washing device (31) is installed between the ultrasonic water washing tank (3) and the tunnel furnace drying device (4), and the transmission device (5) is also arranged on the slow-pull water washing device (31).

2. A glass cover cleaning system according to claim 1, characterized in that: The ultrasonic agent soaking tank (1), the ultrasonic water washing tank (3) and the slow-pull water washing device (31) are all provided with a heating device.

3. The glass cover cleaning system according to claim 1, characterized in that: The transmission device (5) includes a plurality of cranes (51) uniformly distributed in the ultrasonic agent soaking tank (1), the spray rinsing tank (2), the ultrasonic water washing tank (3) and the slow-pull water washing device (31), and a conveying chain (52) installed in the tunnel furnace drying device (4).

4. A glass cover cleaning system according to any one of claims 1 to 3, characterized in that: The hollow frame basket comprises a mother basket (7) and at least one cleaning basket (8) placed in the mother basket (7); the mother basket (7) and the cleaning basket (8) both have an upper opening structure.

5. The glass cover cleaning system according to claim 4, characterized in that: The cleaning basket (8) comprises a cleaning frame (81) with an upper opening structure, a plurality of U-shaped frames (82) installed in the cleaning frame (81), and a plurality of support members (83) evenly distributed on both sides of the U-shaped frames (82) and inside the closed end, wherein the support members (83) are provided with V-shaped grooves (84).

6. The glass cover cleaning system according to claim 5, characterized in that: The support member (83) comprises a support seat (831) mounted on the U-shaped frame (82) and a support shaft (832) rotatably connected to the support seat (831) at both ends, and the V-shaped groove (84) is formed on the outer side of the middle end of the support shaft (832).

7. The glass cover cleaning system according to claim 5, characterized in that: A slot (821) is provided on the inner side of the closed end of the U-shaped frame (82), and part of the support member (83) is adapted to and slidably connected to the slot (821).

8. The glass cover cleaning system according to claim 5, characterized in that: The cleaning frame (81) is provided with a plurality of slide grooves (811), and the U-shaped frame (82) is detachably connected with a plurality of sliders (822) whose one end is adapted to and slidably connected to the slide grooves (811).

9. The glass cover cleaning system according to claim 8, characterized in that: The U-shaped frame (82) is provided with a through hole, the other end of the slider (822) is inserted into the through hole, the other end of the slider (822) is detachably connected to a fastener (823), and the fastener (823) is also detachably connected to the U-shaped frame (82).

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