Manual air pump

Abstract

The utility model relates to the technical field of air extracting pumps, and discloses a manual air extracting pump (100) which comprises an air extracting cylinder (1), a piston rod (2) and a holding handle (3). The piston rod (2) is arranged on the air suction barrel (1) in a drawable manner and is used for drawing air suction, and the holding handle (3) is rotatably arranged on the air suction barrel (1) and can rotate between a single-hand use state and a double-hand use state; in the single-hand use state, the holding handle (3) is far away from the air suction barrel (1), and in the double-hand use state, the holding handle (3) surrounds the periphery of the air suction barrel (1). According to the manual air extracting pump (100), the rotatable holding handle (3) is arranged on the air extracting barrel (1), so that the manual air extracting pump (100) can be used with one hand or two hands, the technical problem that an existing manual air extracting pump (100) is single in use mode is solved, and when the holding handle (3) is retracted to the periphery of the air extracting barrel (1), the occupied space is small, and storage is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of air pumps, and in particular to a manual air pump. Background Art

[0002] A vacuum pump is a device used to generate negative pressure and form a vacuum environment, including electric vacuum pumps, manual vacuum pumps, and foot-operated vacuum pumps.

[0003] A manual vacuum pump is a vacuum pump that is powered by hand force. Currently, the most common manual vacuum pumps can only be operated with one hand or two hands, have a single way of use, and are less practical. Summary of the invention

[0004] The purpose of the present application is to provide a manual air pump to solve the technical problem of the single usage of the manual air pump in the related art.

[0005] In order to solve the above technical problems, the present application provides a manual air pump, comprising:

[0006] A vacuum pump, wherein the vacuum pump has a vacuum chamber;

[0007] A piston rod is movably mounted on the pump, one end of the piston rod extends out of the pumping chamber and is provided with a pull-out handle, and the other end extends into the pumping chamber and is provided with a sealing valve;

[0008] A holding handle, the holding handle includes a holding portion and connecting portions respectively arranged at opposite ends of the holding portion, the two connecting portions are respectively rotatably connected to opposite sides of the vacuum pump, and the holding handle can be rotated relative to the vacuum pump to switch between a single-handed use state and a two-handed use state. In the single-handed use state, the holding portion is located at the end of the pulling handle away from the vacuum pump, and in the two-handed use state, the holding portion is located at the end of the vacuum pump away from the pulling handle.

[0009] In one embodiment, the grip handle can be rotated 180° so that the grip handle can be switched between the one-handed use state and the two-handed use state.

[0010] In one embodiment, the end of the vacuum cylinder away from the pulling handle is also provided with a connecting pipe head for connecting the vacuum tube, and the gripping portion of the holding handle has an avoidance groove. In the two-handed use state, the connecting pipe head is located in the avoidance groove.

[0011] In one embodiment, a mounting hole is provided on the side wall of the vacuum pump and an extension direction of the mounting hole is perpendicular to the axial direction of the vacuum pump; a rotating seat for snapping into the mounting hole is provided on the side of the connecting portion facing the vacuum pump, and the rotating seat includes a plurality of spaced-apart clamping portions and the connecting lines of the outer edges of the plurality of clamping portions form a circle.

[0012] In one embodiment, a first limit groove and a second limit groove are further provided on the side wall of the vacuum pump, and the first limit groove and the second limit groove are distributed at opposite ends of the mounting hole; an opening is provided on the connecting portion and an elastic sheet with one end fixed is arranged in the opening, and a limit block is provided on the side of the elastic sheet facing the vacuum pump, and in the one-handed use state, the limit block is snapped into the first limit groove, and in the two-handed use state, the limit block is snapped into the second limit groove.

[0013] In one embodiment, the surface of the limiting block is arc-shaped.

[0014] In one embodiment, a guide groove is also provided on the side wall of the vacuum cylinder, and the guide groove is provided along the outer edge of the mounting hole and is located between the first limiting groove and the second limiting groove, and the guide groove is also connected to the first limiting groove and the second limiting groove; a guide block is also provided on the connecting part, and the guide block can slide in the guide groove.

[0015] In one embodiment, the manual vacuum pump further comprises an elastic member disposed in the vacuum cylinder, wherein one end of the elastic member is connected to the sealing valve, and the other end of the elastic member is connected to the vacuum cylinder.

[0016] In one embodiment, the pull handle is a ring handle.

[0017] In one embodiment, the vacuum pump comprises a cylinder body and an upper cover which are threadedly connected, and the outer surface of the upper cover is provided with anti-slip grooves.

[0018] The manual air pump provided by the present application includes an air pump, a piston rod and a gripping handle, wherein the piston rod is movably mounted on the air pump, one end of the piston rod extends out of the air pumping cavity and is provided with a pull-out handle, and the other end extends into the air pumping cavity and is provided with a sealing valve, and the gripping handle includes a gripping portion and connecting portions respectively arranged at opposite ends of the gripping portion, the two connecting portions are respectively rotatably connected to opposite sides of the air pump, and the gripping handle can be rotated relative to the air pump to switch between a single-handed use state and a double-handed use state. In the single-handed use state, the gripping portion is located at the end of the pull-out handle away from the air pump, and the user can hold the pull-out handle and the gripping handle with one hand to achieve a single-handed air pumping operation; in the double-handed use state, the gripping portion is located at the end of the air pump away from the pull-out handle, and the user can hold the air pump with one hand and tighten the air pump with the other hand to achieve a double-handed air pumping operation, so that the manual air pump has different usage modes, solves the problem of a single usage mode of the related manual air pump, and significantly improves its convenience and practicality in use. In addition, when used with both hands, the grip handle is in a folded state, and the manual vacuum pump is small in size, making it easy to store. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of the manual air pump provided in an embodiment of the present application when used with one hand;

[0021] Figure 2 for Figure 1 A front view of the manual air pump shown;

[0022] Figure 3 A schematic diagram of the structure of the manual air pump provided in an embodiment of the present application when used with both hands;

[0023] Figure 4 for Figure 3 A front view of the manual air pump shown;

[0024] Figure 5 for Figure 3 A rear view of the manual air pump shown;

[0025] Figure 6 for Figure 3 A side view of the manual air pump shown;

[0026] Figure 7 for Figure 1The schematic diagram of the structure of the manual air pump connected to the air extraction pipe is shown;

[0027] Figure 8 for Figure 7 A front view of the manual air pump shown;

[0028] Fig. 9 for Figure 8 A cross-sectional view of the manual air pump shown;

[0029] Fig.10 for Fig. 9 A magnified view of the structure shown in middle A;

[0030] Fig.11 A schematic diagram of the structure of the manual air pump provided in an embodiment of the present application without the grip handle;

[0031] Fig.12 for Figure 8 A side view of the manual air pump shown;

[0032] Fig.13 for Figure 1 A schematic diagram of the structure of a holding handle in a manual air pump;

[0033] Fig.14 for Fig.13 A magnified view of the structure shown in B.

[0034] Description of main component symbols:

[0035] 100. Manual vacuum pump;

[0036] 1. Vacuum pump; 10. Vacuum chamber; 11. Cylinder body; 12. Upper cover; 121. Anti-slip pattern; 13. Connecting pipe head; 14. Mounting hole; 15. First limiting groove; 16. Second limiting groove; 17. Guide groove;

[0037] 2. Piston rod; 21. Pull-out handle; 22. Sealing valve; 221. Bottom plate; 222. Top plate; 223. Sealing ring;

[0038] 3. Grip handle; 31. Grip portion; 311. Avoidance groove; 32. Connecting portion; 321. Opening; 33. Elastic sheet; 34. Rotating seat; 341. Clamping portion; 35. Limiting block; 36. Guide block;

[0039] 4. Elastic parts;

[0040] 5. Exhaust pipe. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0043] References to "one embodiment", "some embodiments" or "an embodiment" described in the specification of this application mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some other embodiments", "in some other embodiments", etc., which appear at different places in this specification, do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. In addition, in one or more embodiments, particular features, structures or characteristics may be combined in any suitable manner.

[0044] The present application provides a manual air pump that can be used to detect the sealing performance of a camera waterproof case. The manual air pump extracts negative air pressure from the cavity of the camera waterproof case and then detects whether the waterproof case is leaking. The manual air pump can also be used in scenes such as sealed packaging and storage of items.

[0045] Reference Figure 1 , Figure 2 and Fig. 9The manual vacuum pump 100 includes a vacuum cylinder 1, a piston rod 2 and a gripping handle 3. The vacuum cylinder 1 has a vacuum chamber 10, the piston rod 2 is movably mounted on the vacuum cylinder 1, and one end of the piston rod 2 extends out of the vacuum chamber 10 and is provided with a pull-out handle 21, while the other end extends into the vacuum chamber 10 and is provided with a sealing valve 22. The gripping handle 3 includes a gripping portion 31 and connecting portions 32 respectively provided at opposite ends of the gripping portion 31, the two connecting portions 32 are respectively rotatably connected to opposite sides of the vacuum cylinder 1, and the gripping handle 3 can be rotated relative to the vacuum cylinder 1 to switch between a single-handed use state and a two-handed use state. In the single-handed use state, such as Figure 1 As shown, the gripping portion 31 is located at the end of the pull handle 21 away from the pump 1. When the pump 1 is used with both hands, Figure 3 As shown, the gripping portion 31 is located at an end of the vacuum pump 1 away from the pulling handle 21 .

[0046] The vacuum cylinder 1 is defined as an end in the axial direction and a side in the radial direction.

[0047] The connection portion 32 of the gripping handle 3 is hinged to the side wall of the pump 1, and the gripping handle 3 can rotate in a plane parallel to the axial direction of the pump 1 with the hinge point as the rotation center. It should be noted that in the one-handed use state, there is a movable space between the gripping portion 31 of the gripping handle 3 and the end of the pump 1, and the pulling handle 21 can make a linear motion in the movable space along the axial direction of the pump 1.

[0048] When the sealing valve 22 reciprocates in the air pumping chamber 10, it can compress and stretch the air in the air pumping chamber 10 with a fixed volume to form a vacuum (negative pressure), thereby generating a pressure difference between the air pumping port and the external atmospheric pressure. Under the action of the pressure difference, the gas in the object to be vacuumed can be pressed (sucked) into the air pumping chamber 10 and discharged through the exhaust hole (not shown) or the gap structure on the air pump 1. It can be understood that an exhaust hole can be set on the upper cover 12 of the air pump 1, or a gap that can be used for exhaust can be formed between the piston rod 2 and the upper cover 12.

[0049] The manual air pump 100 includes two usage states: Figure 1 As shown, first, when the gripping handle 3 is rotated to a one-handed use state, the gripping portion 31 of the gripping handle 3 is located at the end of the pulling handle 21 away from the vacuum pump 1, and the pulling handle 21 is located inside the gripping handle 3. The user can hold the vacuum pump with one hand, with the palm of the hand against the gripping portion 31 to keep it still, and the fingers grasp and pull the pulling handle 21, thereby realizing one-handed operation of the vacuum pump; Figure 3As shown, secondly, when the grip handle 3 is rotated to the two-handed use state, the gripping portion 31 or the connecting portion 32 of the grip handle 3 is placed on or around the vacuum pump 1, and the user can hold the vacuum pump 1 with one hand and hold and pull the vacuum pump with the other hand, thereby realizing the two-handed operation of the vacuum pump. It can be understood that two-handed vacuuming is conducive to reducing the difficulty of vacuuming, and the vacuuming action is relatively easy.

[0050] The manual air pump 100 provided in the present application includes an air pump 1, a piston rod 2 and a gripping handle 3. The piston rod 2 is movably mounted on the air pump 1. One end of the piston rod 2 extends out of the air pumping chamber 10 and is provided with a pulling handle 21, and the other end extends into the air pumping chamber 10 and is provided with a sealing valve 22. The gripping handle 3 includes a gripping portion 31 and connecting portions 32 respectively arranged at opposite ends of the gripping portion 31. The two connecting portions 32 are respectively rotatably connected to opposite sides of the air pump 1. The gripping handle 3 can be rotated relative to the air pump 1 to switch between a single-handed use state and a two-handed use state. Among them, in the one-handed use state, the gripping portion 31 is located at the end of the pulling handle 21 away from the vacuum pump 1, and the user can hold the pulling handle 21 and the gripping handle 3 with one hand to achieve a one-handed pumping operation; in the two-handed use state, the gripping portion 31 is located at the end of the vacuum pump 1 away from the pulling handle 21, and the user can hold the vacuum pump 1 with one hand and tighten the vacuum pump with the other hand to achieve a two-handed pumping operation, so that the manual vacuum pump 100 has different usage methods, which solves the problem of the single usage method of the related manual vacuum pumps and significantly improves its convenience and practicality. In addition, in the two-handed use state, the gripping handle 3 is in a folded state, and the manual vacuum pump 100 is small in size and easy to store.

[0051] In the embodiment provided in the present application, the grip handle 3 can be rotated 180°, so that the grip handle 3 can be switched between a one-handed use state and a two-handed use state.

[0052] like Figure 4 , Figure 5 and Figure 6 As shown, in the two-handed use state, the gripping handle 3 surrounds the outside of the vacuum pump 1 , the two connecting parts 32 are opposite to the side wall of the vacuum pump 1 , and the gripping part 31 is opposite to the end face of the vacuum pump 1 .

[0053] With the above design, the gripping handle 3 is retracted to the periphery of the vacuum pump 1 when the pump is used with both hands, so that the space is small, and the pump is convenient to store and carry.

[0054] It can be understood that in some embodiments, the gripping handle 3 is relatively small in size, and when the gripping handle 3 is used with both hands, the gripping portion 31 and the connecting portion 32 are both placed on the side wall of the vacuum pump 1, and the rotation angle of the gripping handle 3 when switching from a single-handed use state to a two-handed use state is less than 180°.

[0055] In the embodiments provided in this application, Figure 3 , Figure 7 and Fig.13 As shown, the end of the vacuum pump 1 facing away from the pulling handle 21 is also provided with a connecting pipe head 13, and the gripping portion 31 of the gripping handle 3 has an escape groove 311. When used with both hands, the connecting pipe head 13 is located in the escape groove 311.

[0056] The connecting pipe head 13 is used to connect the exhaust pipe 5 , and to ensure the use effect, the connecting pipe head 13 is usually located at the center of the end surface of the exhaust cylinder 1 .

[0057] One side of the avoidance groove 311 is designed to be open, so that when the grip handle 3 is rotated to a two-handed use state, the connecting pipe head 13 can be naturally inserted into the avoidance groove 311.

[0058] The holding handle 3 has a reasonable structure, which is conducive to reducing the size of the holding handle 3 and avoiding interference between the holding handle 3 and the connecting pipe head 13.

[0059] In the embodiments provided in this application, Fig.11 , Fig.12 and Fig.13 As shown, a mounting hole 14 is provided on the side wall of the vacuum pump 1, and the extending direction of the mounting hole 14 is perpendicular to the axial direction of the vacuum pump 1. A rotating seat 34 for clamping into the mounting hole 14 is provided on the side of the connecting portion 32 facing the vacuum pump 1, and the rotating seat 34 includes a plurality of clamping portions 341 arranged at intervals, and the connecting line of the outer edges of the plurality of clamping portions 341 forms a circle, and the rotating seat 34 can rotate in the mounting hole.

[0060] The rotating seat 34 is composed of a plurality of clamping parts 341, and the plurality of clamping parts 341 can be slightly deformed so as to be clamped into the mounting hole 14. Figure 8 , Fig. 9 and Fig.13 As shown, a groove structure is also designed on the outer surface of the clamping portion 341 to enhance the clamping effect between the rotating seat 34 and the air pump 1 .

[0061] The rotating seat 34 has a reasonable structural design, and the gripping handle 3 and the vacuum pump 1 are easy to assemble and disassemble.

[0062] In the embodiment provided in the present application, the specific structure of the rotating seat 34 and the number of the clamping parts 341 are not unique.

[0063] In some embodiments, Fig.13 and Fig.14 As shown, the rotating seat 34 includes two holding portions 341 that are opposite to each other and spaced apart.

[0064] In some embodiments, the rotating seat 34 may further include three spaced and evenly distributed clamping portions 341 , the cross-sectional shape of the clamping portion 341 is fan-shaped, and the radius of the fan-shaped portion is smaller than the radius of the mounting hole 14 .

[0065] In the embodiments provided in this application, Fig.12 and Fig.13 As shown, the side wall of the vacuum pump 1 is also provided with a first limiting groove 15 and a second limiting groove 16, and the first limiting groove 15 and the second limiting groove 16 are distributed at opposite ends of the mounting hole 14. An opening 321 is provided on the connecting portion 32, and an elastic sheet 33 with one end fixed is arranged in the opening 321. A limiting block 35 is provided on the side of the elastic sheet 33 facing the vacuum pump 1. When the vacuum pump 1 is used with one hand, the limiting block 35 is inserted into the first limiting groove 15, and when the vacuum pump 1 is used with both hands, the limiting block 35 is inserted into the second limiting groove 16.

[0066] The limiting block 35 is inserted into the first limiting groove 15 to fix the gripping handle 3 in a one-handed use state; the limiting block 35 is inserted into the second limiting groove 16 to fix the gripping handle 3 in a two-handed use state.

[0067] When the grip handle 3 is rotated between the one-handed use state and the two-handed use state, the elastic sheet 33 is slightly deformed and the limit block 35 is pressed against the side wall of the air pump 1 .

[0068] By designing the limit block 35 and the limit groove structure, the position of the holding handle 3 can be fixed, thereby improving the reliability of the holding handle 3 and further improving its ease of use; the design of the elastic sheet 33 structure can reduce the difficulty of rotating the holding handle 3 and reduce the wear of the vacuum pump 1 during the rotation of the holding handle 3.

[0069] In the embodiment provided in the present application, the center line of the first limiting groove 15 and the second limiting groove 16 passes through the center of the mounting hole 14, and the specific positions of the first limiting groove 15 and the second limiting groove 16 are not unique. Optionally, in one embodiment, the end where the pull handle 21 is located is defined as the upper end, such as Fig.11 As shown, the first limiting groove 15 and the second limiting groove 16 are respectively arranged at the upper and lower ends of the mounting hole 14 . Furthermore, the first limiting groove 15 and the second limiting groove 16 are also communicated with the mounting hole 14 .

[0070] In the embodiment provided in the present application, the surface of the limiting block 35 is in an arc shape. Under the action of external force, the limiting block 35 can slide out of the first limiting groove 15 or the second limiting groove 16.

[0071] In the embodiments provided in this application, Fig.12 and Fig.13 As shown, a guide groove 17 is also provided on the side wall of the vacuum cylinder 1. The guide groove 17 is provided along the outer edge of the mounting hole 14 and is located between the first limiting groove 15 and the second limiting groove 16. The guide groove 17 is also connected to the first limiting groove 15 and the second limiting groove 16. A guide block 36 is also provided on the connecting portion 32, and the guide block 36 can slide in the guide groove 17.

[0072] like Fig.11 As shown, the guide groove 17 is designed as a semicircular structure, and the two ends are respectively connected to the first limiting groove 15 and the second limiting groove 16.

[0073] The guide groove 17 is defined as being located on the first side of the mounting hole 14 , and the other side of the mounting hole 14 is defined as the second side. When the grip handle 3 is rotated between the one-handed use state and the two-handed use state, the guide block 36 moves on the first side of the mounting hole 14 , and the limit block 35 moves on the second side of the mounting hole 14 .

[0074] By designing a guide groove 17 structure on the outer edge of the mounting hole 14 and providing a guide block 36 matching the guide groove 17 on the connecting portion 32 , the rotation direction and rotation angle of the gripping handle 3 can be limited, thereby improving the rotation stability of the gripping handle 3 .

[0075] In the embodiment provided in the present application, the manual vacuum pump 100 further includes an elastic member 4 disposed in the vacuum cylinder 1 , wherein one end of the elastic member 4 is connected to the sealing valve 22 , and the other end is connected to the vacuum cylinder 1 .

[0076] Specifically, Figure 8 and Fig. 9 As shown, the elastic member 4 is a spring disposed in the air extraction chamber 10 . The spring is sleeved on the piston rod 2 , and one end of the spring is connected to the sealing valve 22 , and the other end is connected to the cylinder wall near the pull handle 21 .

[0077] The user pulls the pulling handle 21, causing the piston rod 2 and the sealing valve 22 to move toward the side away from the connecting pipe head 13, thereby achieving gas extraction. During this process, the elastic member 4 is compressed; then the user releases the pulling handle 21, and the elastic member 4 rebounds, pushing the sealing valve 22 and the piston rod 2 to move toward the side close to the connecting pipe head 13, causing the sealing valve 22, the piston rod 2 and the pulling handle 21 to automatically reset, completing a complete gas extraction action.

[0078] The above design can further improve the convenience of using the manual air pump 100.

[0079] In the embodiments provided in this application, Figure 1 As shown, the pull handle 21 is a ring handle.

[0080] The loop handle is easy to hold and convenient to use.

[0081] It can be understood that in some embodiments, the pull handle 21 can also be designed as a T-shaped structure.

[0082] In the embodiments provided in this application, Figure 3 As shown, the vacuum pump 1 comprises a cylinder body 11 and an upper cover 12 which are threadedly connected, and an outer surface of the upper cover 12 is provided with anti-slip grooves 121.

[0083] When the user operates or disassembles the vacuum pump 1 with both hands, the user can hold the anti-slip grooves 121 to obtain a better holding effect.

[0084] In the embodiment provided in the present application, the manual air pump 100 further includes an air suction pipe 5 connected to the air suction cylinder 1 .

[0085] Specifically, a connecting pipe head 13 is provided at the end of the vacuum cylinder 1, one end of the vacuum pipe 5 is inserted into the connecting pipe head 13, and the other end is connected to the object to be vacuumed.

[0086] In the embodiment provided in the present application, the sealing valve 22 includes a bottom plate 221, a top plate 222 and a sealing ring 223. Fig. 9 and Fig.10 As shown, the bottom plate 221 and the top plate 222 are installed at one end of the piston rod 2 located in the air extraction chamber 10, and the sealing ring 223 is installed between the bottom plate 221 and the top plate 222, and the outer edge of the sealing ring 223 is also in contact with the inner wall of the air extraction cylinder 1. The bottom plate 221 is threadedly connected to the end of the piston rod 2.

[0087] When the pulling handle 21 and the piston rod 2 are pulled back and forth by manpower, the sealing valve 22 in the air extraction chamber 10 can be driven to reciprocate synchronously, thereby realizing manual air extraction and exhaust.

[0088] In summary, the manual air pump 100 provided by the present application, by providing a rotatable gripping handle 3 on the air pump 1, and configuring a pull-out handle 21 that can be used in conjunction with the gripping handle 3 at one end of the piston rod 2 extending out of the air pumping chamber 10, enables the manual air pump 100 to be operated with both hands and with one hand at the same time, significantly improving its convenience and practicality. Moreover, when the gripping handle 3 is in a two-handed use state, the manual air pump 100 occupies less space and is easy to store.

[0089] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A manual air pump, characterized in that: include: A vacuum pump, wherein the vacuum pump has a vacuum chamber; A piston rod is movably mounted on the pump, one end of the piston rod extends out of the pumping chamber and is provided with a pull-out handle, and the other end extends into the pumping chamber and is provided with a sealing valve; A holding handle, the holding handle includes a holding portion and connecting portions respectively arranged at opposite ends of the holding portion, the two connecting portions are respectively rotatably connected to opposite sides of the vacuum pump, and the holding handle can be rotated relative to the vacuum pump to switch between a single-handed use state and a two-handed use state. In the single-handed use state, the holding portion is located at the end of the pulling handle away from the vacuum pump, and in the two-handed use state, the holding portion is located at the end of the vacuum pump away from the pulling handle.

2. The manual air pump according to claim 1, characterized in that: The grip handle can be rotated 180° so that the grip handle can be switched between the one-handed use state and the two-handed use state.

3. The manual air pump according to claim 2, characterized in that: The end of the vacuum cylinder away from the pulling handle is also provided with a connecting pipe head for connecting to the vacuum pipe, and the gripping portion of the gripping handle has an avoidance groove. In the two-handed use state, the connecting pipe head is located in the avoidance groove.

4. The manual air pump according to claim 1, characterized in that: A mounting hole is provided on the side wall of the vacuum cylinder and the extending direction of the mounting hole is perpendicular to the axial direction of the vacuum cylinder; a rotating seat for being inserted into the mounting hole is provided on the side of the connecting portion facing the vacuum cylinder, and the rotating seat includes a plurality of spaced-apart clamping portions and the connecting lines of the outer edges of the plurality of clamping portions form a circle.

5. The manual air pump according to claim 4, characterized in that: A first limiting groove and a second limiting groove are also provided on the side wall of the vacuum pump, and the first limiting groove and the second limiting groove are distributed at opposite ends of the mounting hole; an opening is provided on the connecting portion and an elastic sheet with one end fixed is arranged in the opening, and a limiting block is provided on the side of the elastic sheet facing the vacuum pump, and in the one-handed use state, the limiting block is snapped into the first limiting groove, and in the two-handed use state, the limiting block is snapped into the second limiting groove.

6. The manual air pump according to claim 5, characterized in that: The surface of the limiting block is in an arc shape.

7. The manual air pump according to claim 5, characterized in that: A guide groove is also provided on the side wall of the vacuum cylinder. The guide groove is provided along the outer edge of the mounting hole and is located between the first limiting groove and the second limiting groove. The guide groove is also connected to the first limiting groove and the second limiting groove. A guide block is also provided on the connecting part, and the guide block can slide in the guide groove.

8. The manual air pump according to any one of claims 1 to 7, characterized in that: The manual air pump also includes an elastic member arranged in the air pump cylinder, one end of the elastic member is connected to the sealing valve, and the other end is connected to the air pump cylinder.

9. The manual air pump according to any one of claims 1 to 7, characterized in that: The pulling handle is a ring-shaped handle.

10. The manual air pump according to any one of claims 1 to 7, characterized in that: The vacuum pump comprises a cylinder body and an upper cover which are threadedly connected, and the outer surface of the upper cover is provided with anti-slip grooves.

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