Weight lifting water bag

Abstract

The utility model relates to the technical field of fitness equipment, in particular to a weightlifting water bag which comprises a bag body, the bag body comprises an outer bag body and an inner bag body, the inner bag body is arranged in the outer bag body, the end of the inner bag body is fixed to the inner wall of the outer bag body, the inner bag body divides the inner space of the outer bag body to form an inflation bin and a water storage bin, and the inflation bin is communicated with the water storage bin. The end face of the outer bag is provided with a water injection port and an inflation port, the water injection port is communicated with the water storage bin, and the inflation port is communicated with the inflation bin; the weightlifting water bag has the advantage that the use stability of the weightlifting water bag is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fitness equipment, and in particular to a weightlifting water bag. Background Art

[0002] In order to facilitate users to carry weight-bearing devices and exercise anytime and anywhere, weight-lifting water bags have appeared on the market. The method of using a weight-lifting water bag is to inject an appropriate amount of water into the bag to make the water bag have the required weight, and then inject air into the water bag to make the water bag bulge. When the required weight is small, there is more space in the water bag for water to flow, resulting in the water in the water bag constantly shaking during the weight-bearing training process, and the center of gravity of the water bag constantly changes, which affects the user's training. Summary of the invention

[0003] In order to improve the use stability of a weightlifting water bag, the present application provides a weightlifting water bag.

[0004] The weightlifting water bag provided in this application adopts the following technical solution:

[0005] A weightlifting water bag comprises a bag body, wherein the bag body comprises an outer bag and an inner bag, wherein the inner bag is placed inside the outer bag, an end of the inner bag is fixed to an inner wall of the outer bag, and the inner bag divides the inner space of the outer bag to form an air filling chamber and a water storage chamber, and a water injection port and an air inflation port are provided on the end face of the outer bag, wherein the water injection port is connected to the water storage chamber, and the air inflation port is connected to the air filling chamber.

[0006] By adopting the above technical solution, the user can first inject an appropriate amount of water into the water storage tank to make the water bag obtain the required weight. Then, inject gas into the inflation tank through the inflation port to make the water bag swell. Since the end of the inner bag is fixed to the inner wall of the outer bag, the water is stably stored in the water storage tank, reducing the shaking caused by the flow of water. At the same time, the design of the inflation tank enables the entire water bag to maintain a stable shape, avoiding the problem of affecting the user's training due to the constant change of the center of gravity of the water bag, and improving the stability of the weightlifting water bag.

[0007] Preferably, the outer bag is provided with a transverse handle and a longitudinal handle, and two of the transverse handles and two of the longitudinal handles are provided, the two transverse handles are arranged at intervals along the length direction of the outer bag, and the two longitudinal handles are arranged at intervals along the length direction of the outer bag.

[0008] By adopting the above technical solution, a horizontal handle and a vertical handle are provided, and a certain distance is provided between the two vertical handles and between the two horizontal handles to adapt to different training movements of the user.

[0009] Preferably, one transverse handle is provided, and two longitudinal handles are provided, the transverse handle is located in the middle of the outer bag, and the two longitudinal handles are respectively located on both sides of the transverse handle.

[0010] By adopting the above technical solution, the horizontal handle is located in the middle of the product, and the two longitudinal handles are respectively located at both ends of the horizontal handle, so that the user can use it as a kettlebell.

[0011] Preferably, it also includes a connecting plate, and the outer bag and the inner bag are both arranged to be hollow in the middle, and there are two connecting plates, which are respectively fixed and sealed to the two ends of the outer bag, and the two connecting plates are respectively fixed and sealed to the two ends of the inner bag, and a telescopic rod is arranged between the two connecting plates.

[0012] By adopting the above technical solution, when storing, the gas in the air filling chamber and the water in the water storage chamber are discharged respectively, and the telescopic rod is controlled to retract, so as to reduce the overall volume occupied by the weightlifting water bag and facilitate storage; when in use, the telescopic rod is controlled to extend so that the connecting plate drives the ends of the outer bag and the inner bag to move to both sides, so that the outer bag and the inner bag are unfolded, which indirectly improves the efficiency of inflation and water injection. At the same time, the telescopic rod can also serve as a handle for the user to hold the weightlifting water bag for exercise.

[0013] Preferably, the outer side of the telescopic rod is covered with a sponge cover.

[0014] By adopting the above technical solution, the addition of the sponge cover provides users with a more comfortable grip experience, effectively reducing the pressure on the hands, allowing users to hold the weightlifting water bag more easily during long-term weight-bearing exercises. At the same time, the sponge cover also has an anti-slip function, providing a more secure grip and preventing slipping caused by sweaty hands or wetness on the surface of the water bag.

[0015] Preferably, a sealing plate is slidably provided on the connecting plate, and when the sealing plate slides a certain distance, the sealing plate covers one side of the water injection port and the inflation port, and a driving component for driving the sealing plate to slide is provided on the connecting plate.

[0016] By adopting the above technical solution, through the design of sliding arrangement on the connecting plate, when the sealing plate slides a certain distance, it will cover one side of the water injection port and the air charging port to form an effective seal. This sealing design prevents dust, debris or other external contaminants from entering the water injection port and the air charging port.

[0017] Preferably, the driving assembly includes a screw rod and a guide rod, the screw rod and the guide rod are parallel to each other, the screw rod and the guide rod are rotatably carried on the connecting plate, the screw rod is threadably engaged with the sealing plate, and the guide rod movably passes through the sealing plate.

[0018] By adopting the above technical solution, when the user rotates the screw through the driving assembly, the threads on the screw cooperate with the corresponding threads on the sealing plate, causing the sealing plate to slide along the axis of the screw. At the same time, the guide rod passes through the sealing plate to ensure that the movement trajectory of the sealing plate remains in the specified direction, preventing it from tilting or deviating from the track during the sliding process.

[0019] Preferably, a control component for controlling the rotation of the screw is also provided on the connecting plate, and the control component includes an outer wheel ring, a transmission gear and two bevel gears meshing with each other. The outer wheel ring and the transmission gear are both rotatably carried on the surface of the connecting plate, and the inner wall of the outer wheel ring is provided with teeth, and the teeth are meshed with the transmission gear. One of the bevel gears is coaxially arranged with the transmission gear, and the other bevel gear is coaxially arranged with the screw.

[0020] By adopting the above technical solution, when the user operates the control assembly, the outer ring and the transmission gear begin to rotate. Since the teeth of the outer ring mesh with the transmission gear, the rotation of the outer ring is transmitted to the transmission gear. One of the bevel gears is coaxially arranged with the transmission gear, and the other bevel gear is coaxially arranged with the screw. As the transmission gear rotates, the screw coaxial with it begins to rotate through the transmission effect of the bevel gear.

[0021] Preferably, a gripping portion is provided on the side wall of the outer ring.

[0022] By adopting the above technical solution, the user can rotate the outer ring more stably by holding the gripping portion, which helps the user to control the control component more easily and achieve precise rotation of the screw.

[0023] Preferably, a fixing component is provided on the surface of the connecting plate, and the fixing component includes a mounting seat, an insertion rod and a return spring. The mounting seat is installed on the surface of the connecting plate, and the insertion rod is slidably set on the mounting seat. A slot is provided on the side wall of the holding part. When the holding part is rotated by a certain angle, the insertion rod is plugged into the slot, one end of the return spring is fixed to the mounting seat, and the other end of the return spring is fixed to the insertion rod.

[0024] By adopting the above technical solution, the user rotates the holding part to a certain angle, the holding part abuts against the end of the insertion rod, and the reset spring is compressed. When the holding part is rotated to a position corresponding to the insertion rod and the slot, the elastic force of the reset spring triggers the insertion of the insertion rod and the holding part, thereby completing the locking of the fixing component.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The user can first inject an appropriate amount of water into the water storage tank to make the water bag obtain the required weight. Then, inject gas into the air storage tank through the air inlet to make the water bag swell. Since the end of the inner bag is fixed to the inner wall of the outer bag, the water is stably stored in the water storage tank, reducing the shaking caused by the flow of water. At the same time, the design of the air storage tank enables the entire water bag to maintain a stable shape, avoiding the problem of the user's training being affected by the constant change of the center of gravity of the water bag, and improving the stability of the use of the weightlifting water bag;

[0027] 2. Set up horizontal handles and vertical handles, and there is a certain distance between the two vertical handles and between the two horizontal handles to adapt to different training movements of users;

[0028] 3. When storing, after respectively discharging the gas in the air filling chamber and the water in the water storage chamber, control the telescopic rod to retract, so as to reduce the overall volume occupied by the weightlifting water bag and facilitate storage; when in use, control the telescopic rod to extend, so that the connecting plate drives the ends of the outer bag and the inner bag to move to both sides, so that the outer bag and the inner bag can be unfolded, which indirectly improves the efficiency of inflation and water injection. At the same time, the telescopic rod can also act as a handle for the user to hold the weightlifting water bag for exercise. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the weightlifting water bag of Example 1 of the present application.

[0030] Figure 2 It is a partial cross-sectional view of the weightlifting water bag of Example 1 of the present application.

[0031] Figure 3 It is a schematic diagram of the overall structure of the weightlifting water bag of Example 2 of the present application.

[0032] Figure 4 It is a schematic diagram of the overall structure of the weightlifting water bag of Example 3 of the present application.

[0033] Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0034] Explanation of the accompanying drawings: 1. bag body; 11. outer bag; 111. water filling port; 112. inflation port; 113. horizontal handle; 114. longitudinal handle; 12. inner bag; 2. inflation chamber; 3. water storage chamber; 4. connecting plate; 41. connecting rod; 42. bearing seat; 5. telescopic rod; 51. sponge cover; 6. sealing plate; 7. driving assembly; 71. screw rod; 72. guide rod; 8. control assembly; 81. outer wheel ring; 811. teeth; 812. gripping part; 8121. first make way groove; 8122. second make way groove; 8123. slot; 82. transmission gear; 83. bevel gear; 9. fixing assembly; 91. mounting seat; 92. insertion rod; 921. connecting block; 93. reset spring. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-Figure 2 This application is described in further detail.

[0036] Embodiment 1:

[0037] The present application embodiment discloses a weightlifting water bag. Figure 1 and Figure 2 The weightlifting water bag includes a bag body 1, which includes an outer bag 11 and an inner bag 12. The outer bag 11 is hollow, and the inner bag 12 is built into the outer bag 11. The end of the inner bag 12 is fixed to the inner wall of the outer bag 11. The inner bag 12 divides the internal space of the outer bag 11 to form an air-filled bin 2 and a water storage bin 3. When the air-filled bin 2 is filled with gas and the water storage bin 3 is filled with water, the outer bag 11 is cylindrical in shape.

[0038] Further, the end surface of the outer bag 11 is provided with a water injection port 111 and an air charging port 112, the water injection port 111 is connected to the water storage bin 3, and the air charging port 112 is connected to the air charging bin 2. In this embodiment, the water injection port 111 and the air charging port 112 are both provided with a one-way valve port, that is, gas and water can only flow in one direction, as described below:

[0039] Specifically, the one-way valve in the embodiment of the present application is a design that allows fluid (gas or liquid) to flow freely in one direction, while preventing the flow of fluid in the other direction. In the design of the water injection port 111 and the air filling port 112, the setting of the one-way valve ensures the following two key points:

[0040] Among them, the sealing performance in the natural state: When the system is in the natural state, that is, when the user does not perform any operation, the one-way valve port prevents the air and water in the air filling chamber 2 and the water storage chamber 3 from leaking out from the water filling port 111 and the air filling port 112. This ensures that the weightlifting water bag remains sealed when no water filling or air filling operation is required, preventing unnecessary liquid or gas leakage.

[0041] In addition, ventilation and drainage under user operation: When the user intentionally performs water filling or inflation operations, the user injects or discharges the air and water in the inflation tank 2 and the water storage tank 3 through the water filling port 111 and the inflation port 112 in cooperation with the corresponding pump body through corresponding manual operations. In this process, the user's manual operation causes the one-way valve port to open, allowing the fluid to flow in a specific direction. Once the water filling or inflation is completed and the user stops the operation, the one-way valve port will automatically close to maintain the sealing of the system and prevent leakage during normal use. Therefore, such a design not only ensures the safety of the system and prevents accidental leakage, but also provides a user-friendly operating experience, allowing users to conveniently perform water filling and inflation operations.

[0042] In summary, the user can first inject an appropriate amount of water into the water storage tank 3 to make the water bag obtain the required weight. Then, inject gas into the air filling tank 2 through the air filling port 112 to make the water bag swell. Since the end of the inner bag 12 is fixed to the inner wall of the outer bag 11, the water is stably stored in the water storage tank 3, reducing the shaking phenomenon caused by the flow of water. At the same time, the design of the air filling tank 2 enables the entire water bag to maintain a stable shape, avoiding the problem of affecting the user's training due to the constant change of the center of gravity of the water bag, and improving the stability of the weightlifting water bag.

[0043] Furthermore, the outer bag 11 is fixed with a transverse handle 113 and a longitudinal handle 114 , and two transverse handles 113 and two longitudinal handles 114 are provided. The two transverse handles 113 are arranged at intervals along the length direction of the outer bag 11 , and the two longitudinal handles 114 are arranged at intervals along the length direction of the outer bag 11 .

[0044] Correspondingly, a transverse handle 113 and a longitudinal handle 114 are provided, and a certain distance is provided between the two longitudinal handles 114 and between the two transverse handles 113 to accommodate different training movements of the user.

[0045] The implementation principle of the weightlifting water bag in the embodiment of the present application is:

[0046] The user can first inject an appropriate amount of water into the water storage tank 3 to make the water bag obtain the required weight. Then, gas is injected into the air filling tank 2 through the air filling port 112 to make the water bag swell. Since the end of the inner bag 12 is fixed to the inner wall of the outer bag 11, the water is stably stored in the water storage tank 3, reducing the shaking phenomenon caused by the flow of water. At the same time, the design of the air filling tank 2 enables the entire water bag to maintain a stable shape, avoiding the problem of affecting the user's training due to the constant change of the center of gravity of the water bag, and improving the stability of the weightlifting water bag.

[0047] Embodiment 2:

[0048] Reference Figure 3 The difference from Example 1 is that the length of the outer bag 11 and the inner bag 12 in the embodiment of the present application is smaller than that of the outer bag 11 and the inner bag 12 in Example 1, and one transverse handle 113 is provided and two longitudinal handles 114 are provided. The transverse handle 113 is located in the middle of the outer bag 11, and the two longitudinal handles 114 are respectively located on both sides of the transverse handle 113.

[0049] Therefore, the transverse handle 113 is located in the middle of the product, and the two longitudinal handles 114 are respectively located at both ends of the transverse handle 113, so that the user can use it as a kettlebell.

[0050] Embodiment 3:

[0051] Reference Figure 4 and Figure 5, which is different from Example 1, is that it also includes a connecting plate 4, the outer bag 11 and the inner bag 12 are both arranged to be through, the connecting plate 4 is arranged in a disc shape, and there are two connecting plates 4, the two connecting plates 4 are respectively fixed and sealed to the two ends of the outer bag 11, and the two connecting plates 4 are respectively fixed and sealed to the two ends of the inner bag 12, and a telescopic rod 5 is arranged between the two connecting plates 4.

[0052] Correspondingly, when storing, after the gas in the air filling chamber 2 and the water in the water storage chamber 3 are discharged respectively, the telescopic rod 5 is controlled to retract, so as to reduce the overall volume occupied by the weightlifting water bag and facilitate storage; when in use, the telescopic rod 5 is controlled to extend so that the connecting plate 4 drives the ends of the outer bag 11 and the inner bag 12 to move to both sides, so that the outer bag 11 and the inner bag 12 are unfolded, indirectly improving the efficiency of inflation and water injection. At the same time, the telescopic rod 5 can also act as a handle for the user to hold the weightlifting water bag for exercise.

[0053] In this embodiment, two telescopic rods 5 are provided, and connecting rods 41 are fixed to the side walls of the two connecting plates 4. The cross-section of the connecting rod 41 is L-shaped, and one end of the two connecting rods 41 is vertically fixed to the side walls of the two connecting plates 4. At the same time, one end of one of the telescopic rods 5 is vertically fixed to the other end of one of the connecting rods 41, one end of the other telescopic rod 5 is vertically fixed to the side wall of the other connecting rod 41, and the other ends of the two telescopic rods 5 are fixed to each other.

[0054] Furthermore, the outer side of the telescopic rod 5 is provided with a sponge cover 51, which is located on the side of the telescopic rod 5 close to the connecting rod 41. The addition of the sponge cover 51 provides a more comfortable gripping experience for the user, effectively reduces the pressure feeling of the hand, and enables the user to hold the weightlifting water bag more easily during long-term weight-bearing exercise. At the same time, the sponge cover 51 also has an anti-slip function, providing a more secure grip and preventing slipping caused by sweating hands or the wet surface of the water bag.

[0055] On the other hand, a sealing plate 6 is slidably provided on the connecting plate 4, and the sealing plate 6 is parallel to the connecting plate 4. When the sealing plate 6 slides for a certain distance, the sealing plate 6 covers one side of the water injection port 111 and the inflation port 112, and a driving component 7 for driving the sealing plate 6 to slide is provided on the connecting plate 4.

[0056] Correspondingly, through the design of the sliding arrangement on the connecting plate 4, when the sealing plate 6 slides a certain distance, it will cover one side of the water inlet 111 and the air inlet 112 to form an effective seal. This sealing design prevents dust, debris or other external contaminants from entering the water inlet 111 and the air inlet 112.

[0057] Specifically, the driving assembly 7 includes a screw rod 71 and a guide rod 72, the screw rod 71 and the guide rod 72 are parallel to each other, two bearing seats 42 are fixed on the surface of the connecting plate 4, the two bearing seats 42 are parallel to each other, one end of the screw rod 71 and the guide rod 72 are rotatably supported on one of the bearing seats 42, and the other ends of the screw rod 71 and the guide rod 72 are rotatably supported on the other bearing seat 42. At the same time, the screw rod 71 is threadedly matched with the sealing plate 6, and the guide rod 72 movably penetrates the sealing plate 6.

[0058] Therefore, when the user rotates the screw rod 71 through the driving assembly 7, the threads on the screw rod 71 cooperate with the corresponding threads on the sealing plate 6, causing the sealing plate 6 to slide along the axis direction of the screw rod 71. At the same time, the guide rod 72 penetrates the sealing plate 6 to ensure that the movement trajectory of the sealing plate 6 remains in the specified direction, preventing it from tilting or deviating from the track during the sliding process.

[0059] Furthermore, in order to facilitate user operation, a control assembly 8 for controlling the rotation of the screw 71 is also provided on the connecting plate 4, and the control assembly 8 includes an outer ring 81, a transmission gear 82, and two mutually meshing bevel gears 83. The outer ring 81 is arranged in an annular shape, and the outer diameter of the outer ring 81 is the same as the outer diameter of the connecting plate 4. The outer ring 81 and the transmission gear 82 are both rotatably carried on the surface of the connecting plate 4, wherein the axes of the transmission gear 82 and the outer ring 81 are parallel to the axis of the connecting plate 4. In addition, the inner wall of the outer ring 81 is provided with teeth 811, and the teeth 811 are mutually meshed with the transmission gear 82, wherein one of the bevel gears 83 is arranged coaxially with the transmission gear 82, and the other bevel gear 83 is arranged coaxially with the screw 71.

[0060] Therefore, when the user operates the control assembly 8, the outer ring 81 and the transmission gear 82 start to rotate. Since the teeth 811 of the outer ring 81 are meshed with the transmission gear 82, the rotation of the outer ring 81 is transmitted to the transmission gear 82. One of the bevel gears 83 is coaxially arranged with the transmission gear 82, and the other bevel gear 83 is coaxially arranged with the screw 71. As the transmission gear 82 rotates, the screw 71 coaxial therewith starts to rotate through the transmission effect of the bevel gear 83.

[0061] Furthermore, a gripping portion 812 is vertically fixed to the side wall of the outer ring 81 facing away from the connecting plate 4. The cross-section of the gripping portion 812 is U-shaped. The user can rotate the outer ring 81 more stably by gripping the gripping portion 812, which helps the user to more easily control the control component 8 and achieve precise rotation of the screw 71.

[0062] At the same time, the side wall of the grip portion 812 is also provided with a first clearance groove 8121 and a second clearance groove 8122. The position of the first clearance groove 8121 corresponds to the position of the inflation port 112, and the position of the second clearance groove 8122 corresponds to the position of the connecting rod 41. The first clearance groove 8121 can reduce the blocking of the inflation port 112 by the grip portion 812, so that the user can use the inflation port 112 normally through the first clearance groove 8121. At the same time, after the grip portion 812 is rotated to a certain angle, the connecting rod 41 is accommodated in the second clearance groove 8122. The second clearance groove 8122 can reduce the physical interference between the connecting rod 41 and the grip portion 812, thereby improving the overall stability.

[0063] On the other hand, a fixing assembly 9 is provided on the surface of the connecting plate 4, and the fixing assembly 9 includes a mounting seat 91, an insert rod 92 and a return spring 93. The mounting seat 91 is vertically fixed to the surface of the connecting plate 4, and the insert rod 92 is slidably provided on the mounting seat 91 along the axial direction of the connecting plate 4. At the same time, a slot 8123 is provided on the side wall of the gripping portion 812, and when the gripping portion 812 is rotated to a certain angle, the insert rod 92 is plugged into and matched with the slot 8123. In addition, a connecting block 921 is fixed to the outer wall of the insert rod 92, one end of the return spring 93 is fixed to the mounting seat 91, and the other end of the return spring 93 is connected to the connecting block 921.

[0064] Therefore, the user rotates the holding portion 812 to a certain angle, the holding portion 812 abuts against the end of the insertion rod 92, and the reset spring 93 is compressed. When the holding portion 812 is rotated to the position where the insertion rod 92 corresponds to the slot 8123, the elastic force of the reset spring 93 triggers the insertion of the insertion rod 92 and the holding portion 812, thereby completing the locking of the fixing component 9.

[0065] Similarly, when unlocking is required, the user presses the insertion rod 92 so that the insertion rod 92 passes through the slot 8123 and moves to the bottom of the holding portion 812. At this time, the return spring 93 is compressed, and the user synchronously rotates the holding portion 812 to disengage the holding portion 812 from the insertion rod 92. Under the elastic force of the return spring 93, the insertion rod 92 is reset.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Weightlifting water bag, characterized in that, The invention comprises a bag body (1), wherein the bag body (1) comprises an outer bag (11) and an inner bag (12), wherein the inner bag (12) is placed inside the outer bag (11), and the end of the inner bag (12) is fixed to the inner wall of the outer bag (11), and the inner bag (12) divides the internal space of the outer bag (11) to form an air filling chamber (2) and a water storage chamber (3), and the end surface of the outer bag (11) is provided with a water injection port (111) and an air filling port (112), wherein the water injection port (111) is connected to the water storage chamber (3), and the air filling port (112) is connected to the air filling chamber (2).

2. The weightlifting water bag according to claim 1, characterized in that: The outer bag (11) is provided with a transverse handle (113) and a longitudinal handle (114), and two of the transverse handles (113) and the longitudinal handles (114) are provided. The two transverse handles (113) are arranged at intervals along the length direction of the outer bag (11), and the two longitudinal handles (114) are arranged at intervals along the length direction of the outer bag (11).

3. The weightlifting water bag according to claim 2, characterized in that: One transverse handle (113) is provided, and two longitudinal handles (114) are provided. The transverse handle (113) is located in the middle of the outer bag (11), and the two longitudinal handles (114) are respectively located on both sides of the transverse handle (113).

4. The weightlifting water bag according to claim 1, characterized in that: It also includes a connecting plate (4), the outer bag (11) and the inner bag (12) are both arranged to be centrally open, two connecting plates (4) are arranged, the two connecting plates (4) are respectively fixed to and sealed at two ends of the outer bag (11), the two connecting plates (4) are respectively fixed to and sealed at two ends of the inner bag (12), and a telescopic rod (5) is arranged between the two connecting plates (4).

5. The weightlifting water bag according to claim 4, characterized in that: The outer side of the telescopic rod (5) is covered with a sponge cover (51).

6. The weightlifting water bag according to claim 4, characterized in that: A sealing plate (6) is slidably provided on the connecting plate (4); when the sealing plate (6) slides a certain distance, the sealing plate (6) covers one side of the water injection port (111) and the inflation port (112); and a driving component (7) for driving the sealing plate (6) to slide is provided on the connecting plate (4).

7. The weightlifting water bag according to claim 6, characterized in that: The driving assembly (7) comprises a screw rod (71) and a guide rod (72), wherein the screw rod (71) and the guide rod (72) are parallel to each other, and the screw rod (71) and the guide rod (72) are rotatably supported on the connecting plate (4), the screw rod (71) is threadably engaged with the sealing plate (6), and the guide rod (72) movably penetrates the sealing plate (6).

8. The weightlifting water bag according to claim 7, characterized in that: The connecting plate (4) is also provided with a control assembly (8) for controlling the rotation of the screw rod (71). The control assembly (8) comprises an outer wheel ring (81), a transmission gear (82) and two mutually meshing bevel gears (83). The outer wheel ring (81) and the transmission gear (82) are both rotatably supported on the surface of the connecting plate (4). The inner wall of the outer wheel ring (81) is provided with teeth (811). The teeth (811) and the transmission gear (82) are mutually meshed. One of the bevel gears (83) is coaxially arranged with the transmission gear (82), and the other bevel gear (83) is coaxially arranged with the screw rod (71).

9. The weightlifting water bag according to claim 8, characterized in that: The side wall of the outer ring (81) is provided with a gripping portion (812).

10. The weightlifting water bag according to claim 9, characterized in that: A fixing assembly (9) is arranged on the surface of the connecting plate (4), and the fixing assembly (9) comprises a mounting seat (91), an insert rod (92) and a return spring (93). The mounting seat (91) is mounted on the surface of the connecting plate (4), and the insert rod (92) is slidably arranged on the mounting seat (91). A slot (8123) is provided on the side wall of the holding portion (812). When the holding portion (812) is rotated to a certain angle, the insert rod (92) is plugged into and matched with the slot (8123), and one end of the return spring (93) is fixed to the mounting seat (91), and the other end of the return spring (93) is fixed to the insert rod (92).

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