A volumetric flask fixing device

Abstract

The application provides a capacity bottle fixing device, which comprises a base, an adjusting piece and an elastic drawstring; the base is provided with a groove for accommodating the bottom of the capacity bottle; the adjusting piece is slidingly arranged on the base; the middle part of the elastic drawstring is wound around the middle part of the capacity bottle, and at least one end of the elastic drawstring is connected with the adjusting piece. The overall structure of the application is small in size, flat in structure, small in occupied space, convenient to carry and store; the base is provided with a groove which is matched with the bottom of the capacity bottle in shape, so that the capacity bottle can be placed more stably and the shaking is reduced. The adjusting piece can slide along the base, and the tightness of the elastic drawstring can be adjusted by changing the position of the adjusting piece to adapt to capacity bottles of different specifications. The elastic drawstring has good elasticity, and when it is wound around the middle part of the capacity bottle, it can firmly fix the capacity bottle and will not cause damage to the capacity bottle due to excessive extrusion, thereby improving the applicability and safety of the capacity bottle fixing device.

Description

Technical Field

[0001] This application belongs to the technical field of laboratory glassware support devices, and more specifically, relates to a volumetric flask fixing device. Background Technology

[0002] Volumetric flasks are commonly used volumetric measuring instruments in laboratories. They have a round bottom and a long, thin neck, making them easy to tip over and break. They are particularly important for stability during the preparation of standard solutions or in the process of settling.

[0003] Existing volumetric flask fixing devices are mostly rigid structures, which are cumbersome to operate or have uneven clamping force. They also have problems such as taking up a lot of space, being inconvenient to store, and posing a potential risk of damage to the volumetric flasks, which are not conducive to improving the efficiency and safety of daily experiments. Utility Model Content

[0004] The purpose of this application is to provide a volumetric flask fixing device to solve the technical problems existing in the prior art, such as cumbersome operation, uneven clamping force, large space occupation, inconvenient storage, and potential damage risk to the volumetric flask.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a volumetric flask fixing device is provided, including a base, an adjusting member, and an elastic strap; the base is provided with a groove for accommodating the bottom of the volumetric flask; the adjusting member is slidably disposed on the base; the middle part of the elastic strap is wrapped around the middle part of the volumetric flask, and at least one end of the elastic strap is connected to the adjusting member.

[0006] Furthermore, the base includes an upper base plate and a lower base plate connected to each other, with a cavity between the upper base plate and the lower base plate, and the middle part of the upper base plate is recessed into the cavity to form the groove; the upper base plate is provided with a sliding groove, and the adjusting member is slidably connected to the sliding groove.

[0007] Furthermore, the elastic strap is either fixedly connected to or detachably connected to the adjusting member.

[0008] Furthermore, the upper base plate is a flexible material plate.

[0009] Furthermore, the adjusting component includes a slider and a button, the slider being disposed within the cavity; one end of the button passing through the slide groove and connected to the slider; wherein, the slider is provided with a limiting protrusion, and the upper base plate is provided with a limiting groove on the side facing the cavity; pressing the button can cause the limiting protrusion and the limiting groove to abut against or separate from each other.

[0010] Furthermore, the limiting groove is provided in multiple ways, and the multiple limiting grooves are distributed along the length direction of the slide groove.

[0011] Furthermore, the slider includes a sliding base and a movable plate, the movable plate being movably disposed within the sliding base and capable of moving up and down along the height direction of the sliding base; the limiting protrusion is disposed on the side of the movable plate opposite to the sliding base.

[0012] Furthermore, the slider also includes an elastic element, one end of which abuts against the sliding seat, and the other end of which abuts against the movable plate.

[0013] Furthermore, each end of the elastic band is connected to an adjustment member.

[0014] Furthermore, the slide groove is provided in multiple ways, the groove is located at the intersection of multiple slide grooves, and the number of elastic pull straps corresponds one-to-one with the number of slide grooves.

[0015] The beneficial effects of the volumetric flask fixing device provided in this application are as follows: Compared with the prior art, the volumetric flask fixing device of this application includes a base, an adjusting member, and an elastic strap. The overall structure is compact and flat, occupying little space and making it easy to carry and store. The base has a groove whose shape is adapted to the bottom of the volumetric flask, making the volumetric flask more stable and reducing shaking. The adjusting member can slide along the base, and by changing the position of the adjusting member, the tightness of the elastic strap can be adjusted to accommodate volumetric flasks of different sizes. The elastic strap has good elasticity, and when wrapped around the middle of the volumetric flask, it can firmly fix the volumetric flask without damaging it due to excessive compression, thus improving the applicability and safety of the volumetric flask fixing device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the volumetric flask fixing device provided in the embodiments of this application;

[0018] Figure 2 This is a top view of the volumetric flask fixing device provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the slider and groove in the volumetric flask fixing device provided in the embodiments of this application (button open);

[0020] Figure 4A schematic diagram of the slider and groove in the volumetric flask fixing device provided in the embodiments of this application (button pressed);

[0021] Figure 5 A schematic diagram of the internal structure of the slider in the volumetric flask fixing device provided in the embodiments of this application (button open);

[0022] Figure 6 A schematic diagram of the internal structure of the slider in the volumetric flask fixing device provided in the embodiment of this application (button pressed).

[0023] The following are the labeling elements in the figure:

[0024] 100 - Base; 101 - Upper base plate; 111 - Groove; 112 - Slide groove; 113 - Limiting groove; 102 - Lower base plate; 103 - Cavity;

[0025] 200-Adjusting component; 201-Slider; 211-Limiting protrusion; 212-Sliding seat; 213-Moving plate; 214-Elastic component; 202-Button;

[0026] 300-elastic zipper;

[0027] 400-volume flask. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] Please refer to the following: Figure 1 and Figure 2 The volumetric flask fixing device provided in the embodiments of this application will now be described. The volumetric flask fixing device includes a base 100, an adjusting member 200, and an elastic pull strap 300; the base 100 is provided with a groove 111 for accommodating the bottom of the volumetric flask 400; the adjusting member 200 is slidably disposed on the base 100; the middle part of the elastic pull strap 300 is wrapped around the middle part of the volumetric flask 400, and at least one end of the elastic pull strap 300 is connected to the adjusting member 200.

[0033] Compared with the prior art, the volumetric flask fixing device provided in this application embodiment includes a base 100, an adjusting member 200, and an elastic strap 300. The overall structure is compact and flat, occupying little space and making it easy to carry and store. The base 100 has a groove 111, the shape of which is adapted to the bottom of the volumetric flask 400, making the volumetric flask 400 more stable and reducing shaking. The adjusting member 200 can slide along the base 100. By changing the position of the adjusting member 200, the tightness of the elastic strap 300 can be adjusted to accommodate volumetric flasks 400 of different sizes. The elastic strap 300 has good elasticity; when wrapped around the middle of the volumetric flask 400, it can firmly fix the volumetric flask 400 without damaging it due to excessive compression, thus improving the applicability and safety of the volumetric flask fixing device.

[0034] In this embodiment, the shape of the groove 111 is adapted to the bottom of the volumetric flask 400. For example, if the bottom of the volumetric flask 400 is spherical, then the shape of the groove 111 is also spherical. This design allows the volumetric flask 400 and the groove 111 to fit tightly together, further enhancing the fixing effect. When the volumetric flask 400 is placed in the groove 111, the spherical groove 111 can evenly bear the pressure from the bottom of the volumetric flask 400, preventing the volumetric flask 400 from tipping over due to uneven local force. At the same time, for volumetric flasks 400 with spherical bottoms of different diameters, the cooperation between the adjusting member 200 and the elastic strap 300 can still achieve a good fixing effect. By adjusting the tightness of the elastic strap 300, the device can be adapted to volumetric flasks 400 with spherical bottoms of various specifications.

[0035] In one embodiment of this application, please refer to the following: Figure 3 and Figure 5 The base 100 includes an upper base plate 101 and a lower base plate 102 connected to each other. A cavity 103 is provided between the upper base plate 101 and the lower base plate 102. The middle part of the upper base plate 101 is recessed into the cavity 103 to form a groove 111. A sliding groove 112 is provided on the upper base plate 101, and the adjusting member 200 is slidably connected to the sliding groove 112.

[0036] In this embodiment, the groove 112 serves as a guide for the sliding of the adjusting member 200, enabling it to move along a specific trajectory and preventing deviation during sliding, thereby ensuring the adjustment accuracy of the elastic band 300. When the adjusting member 200 slides within the groove 112, the operator can more precisely control the tension of the elastic band 300, allowing the volumetric flask fixing device to better adapt to volumetric flasks 400 of different specifications.

[0037] In one embodiment of this application, the elastic pull strap 300 is fixedly connected to or detachably connected to the adjusting member 200.

[0038] When the elastic strap 300 is fixedly connected to the adjusting component 200, the structure is relatively simple and the overall stability is high. There is no need to worry about accidental separation during frequent use, and it can always maintain the fixing effect on the volumetric flask 400. If the elastic strap 300 and the adjusting component 200 are detachably connected, this provides convenience for the maintenance and replacement of parts. If the elastic strap 300 wears or is damaged after long-term use, it can be easily removed from the adjusting component 200 and replaced with a new elastic strap 300, without having to replace the entire fixing device. This effectively reduces operating costs and increases the flexibility of the device, allowing for the selection of elastic straps 300 of different materials and specifications to suit specific needs.

[0039] In one embodiment of this application, the upper base plate 101 is a flexible material plate.

[0040] In this embodiment, the upper base plate 101 is made of a flexible material, which allows the groove 111 to better fit the bottom of the volumetric flask 400 of different shapes and materials, further enhancing the stability of the fixation. This flexible material also has a certain cushioning effect, effectively protecting the volumetric flask 400 from damage even when subjected to slight impacts.

[0041] Specifically, this flexible material plate can be made of silicone. Silicone is soft and highly malleable, automatically adjusting its shape to conform to the contours of the bottom of the volumetric flask 400, tightly wrapping around it. Simultaneously, silicone has excellent elastic recovery, maintaining its flexibility and fit even after repeated use. Alternatively, rubber can be chosen. Rubber also possesses good flexibility and cushioning properties, and its wear-resistant and aging-resistant characteristics ensure that the upper base plate 101 maintains effective fixation and protection for the volumetric flask 400 during long-term use. Both silicone and rubber provide superior stability and protection for the volumetric flask fixing device.

[0042] In this embodiment, the lower base plate 102 can also be made of a flexible material. This allows the lower base plate 102 to better fit different placement surfaces, enhancing the stability of the entire volumetric flask fixing device. If the lower base plate 102 is made of rubber, its high friction effectively prevents the device from sliding on the table. Even when placed on uneven surfaces, the rubber's flexibility allows for adaptive adjustment, maintaining the device's stability. If silicone is chosen, its skin-friendly properties make handling the device comfortable and it is less prone to dust accumulation, facilitating cleaning. By using flexible materials for both the upper and lower base plates 102, the adaptability of the volumetric flask fixing device to different usage scenarios and the volumetric flask 400 is comprehensively improved, further optimizing the user experience.

[0043] In this embodiment, both the upper base plate 101 and the lower base plate 102 are preferably made of silicone. Silicone has good corrosion resistance and chemical resistance, can withstand a variety of chemical solutions, and is suitable for long-term use in experimental environments.

[0044] In one embodiment of this application, please refer to the following: Figure 3 and Figure 5 The adjusting component 200 includes a slider 201 and a button 202. The slider 201 is disposed in the cavity 103. One end of the button 202 passes through the slide groove 112 and is connected to the slider 201. The slider 201 is provided with a limiting protrusion 211, and the upper base plate 101 is provided with a limiting groove 113 on the side facing the cavity 103. Pressing the button 202 can cause the limiting protrusion 211 and the limiting groove 113 to abut against each other or separate.

[0045] In this embodiment, with this design, the user can easily control the connection state between the limiting protrusion 211 and the limiting groove 113 by pressing the button 202; realize the rapid positioning and release of the slider 201, which is flexible, requires no tools, and has high operating efficiency.

[0046] When the tension of the elastic band 300 needs to be adjusted to fit volumetric flasks 400 of different sizes, press button 202 to separate the limiting protrusion 211 from the limiting groove 113. At this time, the slider 201 can slide freely in the cavity 103 along the direction of the groove 112, thereby tightening the elastic band 300. After adjusting to the appropriate tension, pull up button 202, and the limiting protrusion 211 abuts against the limiting groove 113 again, fixing the slider 201 in that position, so that the elastic band 300 can stably fix the volumetric flask 400. This adjustment method is simple and intuitive. Even personnel using the volumetric flask fixing device for the first time can quickly master the operation method, greatly improving the convenience and flexibility of the device in actual use, and meeting the diverse needs of fixing volumetric flasks 400 in different experimental scenarios.

[0047] Specifically, the limiting protrusion 211 can be hemispherical. This design provides good stability when the limiting protrusion 211 abuts against the limiting groove 113. Simultaneously, when the button 202 is pressed, the hemispherical limiting protrusion 211 separates smoothly from the limiting groove 113 without any jamming. The limiting groove 113 is hemispherical and matches the limiting protrusion 211, ensuring a tight fit and preventing the slider 201 from moving arbitrarily when in a fixed position.

[0048] In one embodiment of this application, please refer to the following: Figure 3 and Figure 5 Multiple limiting grooves 113 are provided, and the multiple limiting grooves 113 are distributed along the length direction of the slide groove 112.

[0049] In this embodiment, the multiple limiting grooves 113 further increase the precision of adjustment. Since volumetric flasks 400 of different sizes vary in size, by setting multiple limiting grooves 113, the user can accurately fix the slider 201 in the corresponding position of the limiting groove 113 according to the actual size of the volumetric flask 400. For example, for smaller volumetric flasks 400, the slider 201 can be fixed in the limiting groove 113 near the beginning of the slide 112, allowing the elastic band 300 to fix the volumetric flask 400 with a smaller tension; while for larger volumetric flasks 400, the slider 201 can be fixed in the limiting groove 113 near the end of the slide 112, ensuring that the elastic band 300 provides sufficient tension. Thus, regardless of the size of the volumetric flask 400, the device can achieve stable and reliable fixing through precise adjustment, further improving the versatility and practicality of the device, and providing more convenient conditions for experimental personnel in various experimental operations.

[0050] In one embodiment of this application, please refer to the following: Figure 4 and Figure 6The slider 201 includes a sliding seat 212 and a movable plate 213. The movable plate 213 is movably disposed within the sliding seat 212 and can move up and down along the height direction of the sliding seat 212. The limiting protrusion 211 is disposed on the side of the movable plate away from the sliding seat 212.

[0051] In this embodiment, by setting the movable plate 213, the slider 201 has greater flexibility when fixing the volumetric flask 400. When it is necessary to fix volumetric flasks 400 of different sizes, the movable plate 213 can move up and down within the sliding seat 212, thereby adjusting the relative position of the limiting protrusion 211 and the limiting groove 113.

[0052] In one embodiment of this application, please refer to the following: Figure 4 and Figure 6 The slider 201 also includes an elastic element 214, one end of which abuts against the sliding seat 212, and the other end of which abuts against the movable plate 213.

[0053] In this embodiment, the elastic element 214 provides a certain buffering and resetting effect for the movement of the movable plate 213. Pressing button 202 moves the movable plate 213 downwards, compressing the elastic element 214 and separating the limiting protrusion 211 from the limiting groove 113. At this time, the position of the slider 201 can be adjusted according to the size of the volumetric flask 400. Releasing button 202 restores the elastic element 214's deformation, pushing the movable plate 213 upwards, causing the limiting protrusion 211 to abut against the limiting groove 113 again, fixing the slider 201 in a suitable position. This design of the elastic element 214, on the one hand, avoids damage to the device caused by sudden movement of the movable plate 213; on the other hand, even when the device is subjected to external forces such as vibration, the elastic element 214 can absorb some energy, maintaining the relative stability of the slider 201's position and ensuring that the fixing effect of the elastic strap 300 on the volumetric flask 400 is not affected. In practical use, the elastic element 214 can be a spring, which has good elasticity and restoring force, and can reliably achieve the above functions. Meanwhile, the spring constant can be selected according to actual needs. If greater buffering force is required, a spring with a smaller spring constant can be selected; if a faster reset of the movable plate 213 is desired, a spring with a larger spring constant can be selected. In this way, by reasonably selecting the spring constant, the performance of the volumetric flask fixing device can be further optimized, meeting the requirements for stability and flexibility of the device under different experimental scenarios.

[0054] In one embodiment of this application, please refer to the following: Figure 1 and Figure 2 An adjusting element 200 is connected to each end of the elastic tether 300.

[0055] In this embodiment, by providing adjusting members 200 at both ends of the elastic band 300, the adjustment of the tension of the elastic band 300 becomes more flexible and precise. When fixing the volumetric flask 400, the adjusting members 200 at both ends can be operated according to the actual shape and size of the volumetric flask 400, thereby making the winding of the elastic band 300 around the middle of the volumetric flask 400 more even and close. For example, for some irregularly shaped volumetric flasks 400, by adjusting the adjusting members 200 at both ends, the elastic band 300 can better adapt to its curve, ensuring the stability of the fixation. Moreover, this design can also disperse the pressure of the elastic band 300 on the volumetric flask 400 to a certain extent, further reducing the risk of damage to the volumetric flask 400 due to excessive local pressure. The coordinated work of the adjusting members 200 at both ends greatly improves the adaptability of the device to volumetric flasks 400 of various shapes and specifications. Whether the volumetric flask 400 is a standard cylinder or has a special design, it can be perfectly fixed through fine-tuning of the adjusting members 200 at both ends, providing a more reliable guarantee for experimental operations. Meanwhile, in actual use, if the adjusting component 200 at one end malfunctions or needs to be replaced, since the two ends are independent of each other, it will not affect the adjusting function of the other adjusting component 200 on the elastic pull belt 300, which facilitates the maintenance and repair of the device, reduces the cost of use, and improves the durability and practicality of the device.

[0056] In one embodiment of this application, please refer to the following: Figure 1 and Figure 2 Multiple slide grooves 112 are provided, and grooves 111 are located at the intersection of multiple slide grooves 112. The number of elastic pull straps 300 corresponds one-to-one with the number of slide grooves 112.

[0057] In this embodiment, multiple grooves 112 and corresponding elastic straps 300 can fix the volumetric flask 400 from multiple directions. The elastic straps 300 in different directions cooperate with each other, forming a three-dimensional fixing frame, providing all-round support and restraint to the volumetric flask 400, further improving the stability of the volumetric flask 400. For example, when the volumetric flask 400 is impacted by an external force from a certain direction, the multiple elastic straps 300 can share the impact force, preventing the volumetric flask 400 from tipping over or being damaged due to force from a single direction. Moreover, since the groove 111 is located at the intersection of multiple grooves 112, the elastic straps 300 extending from various directions can better cooperate in acting on the volumetric flask 400 at the central position, forming a concentrated and uniform fixing force field. This layout design is not only suitable for conventionally upright volumetric flasks 400, but also for volumetric flasks 400 that need to be placed at an angle or at a special angle. By reasonably adjusting the position of the adjusting member 200 on different slides 112 and utilizing the tension of the elastic straps 300 in different directions, a stable fixation can be achieved, greatly expanding the application scenarios and scope of the device and meeting the diverse needs of experimental operations. In addition, the setting of multiple slides 112 increases the selection of the movement path of the adjusting member 200. Experimenters can flexibly choose the position of the adjusting member 200 on different slides 112 according to the actual situation to achieve the best fixation effect, providing users with greater operational flexibility and autonomy.

[0058] Specifically, the upper base plate 101 can be square in shape, and there are two slide grooves 112 located diagonally on the upper base plate 101; there are also two elastic pull straps 300, which can cross each other and pass over the spherical part of the volumetric bottle 400. By using the sliding adjustment member 200, the elastic pull straps 300 are tightened to form a downward pressing force, thereby fixing the volumetric bottle 400 in the groove 111 of the base 100.

[0059] In one embodiment of this application, the base 100 embeds an electronic balance, which can simultaneously fix the volumetric flask 400 and weigh the liquid. This design greatly improves the convenience and efficiency of the experiment. Experimenters no longer need to use other balance equipment to measure the liquid mass after completing the volume adjustment operation, reducing experimental steps and effectively avoiding errors that may be caused by multiple liquid transfers. The integrated design of the electronic balance and the volumetric flask fixing device makes the entire experimental process more compact and the data measurement more accurate. Furthermore, the display screen of the electronic balance can be placed in an easily observable position, allowing experimenters to clearly read the liquid mass data at any time during the fixing of the volumetric flask 400 and the addition of liquid, further optimizing the user experience.

[0060] The volumetric flask fixing device provided in this application is adjustable in structure, easy to operate, flexible in fixing, corrosion-resistant and durable, easy to store, and adaptable to various specifications of volumetric flasks 400 (such as 25mL, 50mL, 100mL, etc.); it is particularly suitable for various experimental scenarios such as teaching and scientific research.

[0061] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A volumetric flask fixing device, characterized in that, include: A base having a groove for accommodating the bottom of a volumetric flask; Adjusting component, which is slidably disposed on the base; An elastic pull strap is wrapped around the middle of the volumetric flask, and at least one end of the elastic pull strap is connected to the adjusting member.

2. The volumetric flask fixing device as described in claim 1, characterized in that, The base includes an upper base plate and a lower base plate connected to each other, with a cavity between the upper base plate and the lower base plate. The middle part of the upper base plate is recessed into the cavity to form the groove. A sliding groove is provided on the upper base plate, and the adjusting member is slidably connected to the sliding groove.

3. The volumetric flask fixing device as described in claim 2, characterized in that, The elastic strap is either fixedly connected to or detachably connected to the adjusting member.

4. The volumetric flask fixing device as described in claim 2, characterized in that, The upper base plate is made of a flexible material.

5. The volumetric flask fixing device as described in claim 2, characterized in that, The adjusting element includes: A slider, wherein the slider is disposed within the cavity; A button, one end of which passes through the groove and is connected to the slider; The slider has a limiting protrusion, and the upper base plate has a limiting groove on the side facing the cavity; pressing the button can cause the limiting protrusion and the limiting groove to abut or separate from each other.

6. The volumetric flask fixing device as described in claim 5, characterized in that, The limiting groove is provided in multiple ways, and the multiple limiting grooves are distributed along the length direction of the slide.

7. The volumetric flask fixing device as described in claim 5, characterized in that, The slider includes a sliding base and a movable plate. The movable plate is movably disposed within the sliding base and can move up and down along the height direction of the sliding base. The limiting protrusion is disposed on the side of the movable plate opposite to the sliding base.

8. The volumetric flask fixing device as described in claim 7, characterized in that, The slider also includes an elastic element, one end of which abuts against the sliding seat, and the other end of which abuts against the movable plate.

9. The volumetric flask fixing device according to any one of claims 1-8, characterized in that, Each end of the elastic strap is connected to an adjustment element.

10. The volumetric flask fixing device as described in claim 2, characterized in that, The slide groove is provided in multiple ways, the groove is located at the intersection of multiple slide grooves, and the number of elastic pull straps corresponds one-to-one with the number of slide grooves.

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