Manual vacuum pump

Abstract

The utility model relates to a manual vacuum pump which comprises a right vertical plate, a left vertical plate, a piston unit, a spring and an air bag unit connected with the right vertical plate and the left vertical plate, the piston unit comprises a piston cylinder, a piston and a piston rod, the right vertical plate is provided with an air inlet and outlet hole, and the left vertical plate is provided with a first vent hole and a second vent hole in the left-right direction. A first one-way valve only allowing airflow to flow into the piston cylinder is arranged on the first vent hole, a second one-way valve only allowing airflow to flow out of the piston cylinder is arranged on the second vent hole, a blocking frame is arranged at the right end of the piston cylinder, the right end of the piston rod is fixed to the right vertical plate, and the spring is located between the piston and the blocking frame. When the manual vacuum pump is used, the air bag unit is grabbed, the piston is driven by the piston rod to move rightwards and compress the spring, air in the article bag is sucked into the piston cylinder, then the palm is released, the piston is jacked by the spring to move rightwards, and the air in the piston cylinder is exhausted through the second vent hole. And the air in the article bag is gradually pumped out.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuuming, and in particular relates to a manual vacuum pump. Background Art

[0002] When packaging and storing some food and clothing, it is often necessary to extract the air from the packaging bag in order to extend the shelf life and reduce the space occupied. Vacuuming often requires special equipment. Existing vacuuming equipment is often large and bulky, and the cost is relatively high. It is only suitable for batch vacuuming by enterprises. There is currently a lack of personal self-service vacuuming devices.

[0003] How to design a manual vacuum pump with simple structure and easy operation to facilitate personal vacuuming is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The purpose of the utility model is to provide a manual vacuum pump to solve the above technical problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A manual vacuum pump comprises a circular right vertical plate, a circular left vertical plate, a piston unit, a spring and an air bag unit connecting the right vertical plate and the left vertical plate, the piston unit comprising a piston cylinder, a piston sealingly slidably arranged in the piston cylinder and a piston rod fixedly connected to the center of the right side of the piston cylinder, the right vertical plate is provided with air inlet and outlet holes connecting the left and right sides of the right vertical plate, the left end of the piston cylinder is fixed to the left vertical plate, a first air vent and a second air vent are arranged on the left vertical plate in the left and right directions connecting the piston cylinder and the outside of the manual vacuum pump, a first one-way valve which only allows air to flow into the piston cylinder is arranged on the first vent, a second one-way valve which only allows air to flow out of the piston cylinder is arranged on the second vent, the right end of the piston cylinder is provided with a baffle, the middle part of the baffle is provided with a guide hole, the piston rod guide is arranged in the guide hole and the right end of the piston rod is fixed to the right vertical plate, and the spring is located between the piston and the baffle.

[0007] Preferably, the airbag unit includes a plurality of three-link units evenly distributed between the right vertical plate and the left vertical plate in the circumferential direction and a drum-shaped airbag of non-elastic material arranged on the outside of the three-link unit, the three-link unit includes a first link hinged on the left vertical plate, a second link arranged horizontally, and a third link hinged on the right vertical plate, the left end of the second link is hinged to the first link and the right end of the second link is hinged to the third link, the two ends of the drum-shaped airbag are respectively fixed on the right vertical plate and the left vertical plate, and the middle part of the drum-shaped airbag is fixed on the second link.

[0008] Preferably, the middle portion of the drum-shaped airbag is glued and fixed on the second connecting rod.

[0009] Preferably, both ends of the second connecting rod are provided with connecting rings, and the middle part of the drum-shaped airbag is provided with a pull ring corresponding to the connecting ring, and the pull ring is connected and fixed to the connecting ring.

[0010] Preferably, the airbag unit comprises an elastic drum-shaped airbag fixed between the right vertical plate and the left vertical plate.

[0011] When using the manual vacuum pump of the utility model, first insert the suction pipe into the article bag or the one-way valve of the article bag, grasp the airbag unit so that the right vertical plate and the left vertical plate are opposite to each other, and the gas in the airbag unit is discharged from the inlet and outlet holes. At the same time, the piston moves to the right under the drive of the piston rod and compresses the spring, and the gas in the article bag is sucked into the piston cylinder. Then release the palm, the piston moves to the right under the top pressure of the spring, and the gas in the piston cylinder is discharged through the second vent hole. At the same time, the airbag unit is propped up and reset, and the external air enters the inside of the airbag unit through the inlet and outlet holes to prepare for the next squeezing. Repeat the above actions to gradually extract the air in the article bag. The manual vacuum pump has a simple structure, is very convenient to operate, and is also easy to carry.

[0012] Furthermore, during the air pumping process, the three-link unit stretches and tends to be straight. Even if the palm and fingers cannot hold all the three-link units, those three-link units that are not held will stretch synchronously driven by the right and left vertical plates. During this process, since the middle part of the drum-shaped airbag made of the entire non-elastic material is fixed on the second link, when the three-link unit stretches, the drum-shaped airbag shrinks synchronously, and the deformation of the airbag is regular, which improves the air pumping efficiency. When the palm is released, the piston moves to the right under the pressure of the spring, the three-link unit shrinks, and the drum-shaped airbag is re-supported. The inflation efficiency of the whole process is relatively high.

[0013] Furthermore, both ends of the second connecting rod have connecting rings, and the middle part of the drum-shaped airbag has a pull ring corresponding to the connecting ring. The pull ring is connected and fixed to the connecting ring to ensure the connection between the drum-shaped airbag and the second connecting rod, so that the two can be propped up or compressed synchronously.

[0014] Furthermore, the airbag unit includes an elastic drum-shaped airbag fixed between the right vertical plate and the left vertical plate, and the elastic drum-shaped airbag structure is simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a manual vacuum pump in an embodiment of the utility model;

[0016] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0017] Among them, 1. drum-shaped airbag; 2. second connecting rod; 3. third connecting rod; 4. first connecting rod; 5. left vertical plate; 6. first air vent; 7. second air vent; 8. valve plate; 9. spring; 10. piston cylinder; 11. piston rod; 12. air inlet and outlet holes; 13. exhaust pipe; 14. right vertical plate; 15. connecting ring; 16. pull ring; 17. piston. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0019] Example 1

[0020] A manual vacuum pump comprises a circular right vertical plate 14, a circular left vertical plate 5, a piston unit, a spring 9 and an airbag unit connecting the right vertical plate and the left vertical plate, wherein the piston unit comprises a piston cylinder 10, a piston 17 sealingly and slidingly arranged in the piston cylinder and a piston rod 11 fixedly connected to the center of the right side of the piston cylinder, the right vertical plate is provided with an air inlet and outlet hole 12 connecting the left and right sides of the right vertical plate, the left end of the piston cylinder is fixed on the left vertical plate 5, and the left vertical plate is provided with a first air vent 6 and a second air vent 6 connecting the piston cylinder and the outside of the manual vacuum pump in the left and right directions. A second air vent 7, a first one-way valve 8' is arranged on the first air vent 6, and a second one-way valve 8 is arranged on the second air vent 7, which only allows air to flow out of the piston cylinder. The right end of the piston cylinder has a baffle 18, and the middle part of the baffle has a guide hole (not shown in the figure). The piston rod 11 is guided through the guide hole and the right end of the piston rod is fixed on the right vertical plate 14. The spring is located between the piston 17 and the baffle 18. In this embodiment, the baffle can be fixed to a cross or rice frame at the right end of the piston cylinder.

[0021] In this embodiment, the airbag unit includes a plurality of three-link units uniformly distributed between the right vertical plate and the left vertical plate in the circumferential direction and a drum-shaped airbag 1 of non-elastic material arranged outside the three-link unit. The three-link unit includes a first link 4 hinged on the left vertical plate, a second link 2 arranged horizontally, and a third link 3 hinged on the right vertical plate. The left end of the second link is hinged to the first link and the right end of the second link is hinged to the third link. The two ends of the drum-shaped airbag are respectively fixed to the right vertical plate and the left vertical plate, and the middle part of the drum-shaped airbag is fixed to the second link. Specifically, the two ends of the second link have connecting rings 15, and the middle part of the drum-shaped airbag has a pull ring 16 corresponding to the connecting ring, and the pull ring is connected and fixed to the connecting ring.

[0022] When using the manual vacuum pump of this embodiment, first insert the suction pipe into the article bag or the one-way valve of the article bag, grasp the airbag unit so that the right and left vertical plates are opposite to each other, and the gas in the airbag unit is discharged from the inlet and outlet holes. At the same time, the piston moves to the right under the drive of the piston rod and compresses the spring, and the gas in the article bag is sucked into the piston cylinder. Then release the palm, the piston moves to the right under the top pressure of the spring, and the gas in the piston cylinder is discharged through the second vent hole. At the same time, the airbag unit is propped up and reset, and the external air enters the airbag unit through the inlet and outlet holes to prepare for the next squeezing. Repeat the above actions to gradually extract the air in the article bag. The manual vacuum pump has a simple structure, is very convenient to operate, and is also easy to carry.

[0023] In addition, during the air pumping process, the three-link unit stretches and tends to be straight. Even if the palm and fingers cannot hold all the three-link units, these three-link units that are not held are also stretched synchronously under the drive of the right and left vertical plates. In this process, since the middle part of the drum-shaped airbag made of the entire non-elastic material is fixed on the second connecting rod, when the three-link unit stretches, the drum-shaped airbag shrinks synchronously, and the airbag deforms regularly, which improves the air pumping efficiency. When the palm is released, the piston moves to the right under the pressure of the spring, the three-link unit shrinks, and the drum-shaped airbag is propped up again. The inflation efficiency of the whole process is relatively high. There are connecting rings at both ends of the second connecting rod, and there is a pull ring corresponding to the connecting ring in the middle of the drum-shaped airbag. The pull ring is connected and fixed to the connecting ring to ensure the connection between the drum-shaped airbag and the second connecting rod, so that the two can be propped up or compressed synchronously.

[0024] In other embodiments, different from embodiment 1, the middle part of the drum-shaped airbag is glued and fixed on the second connecting rod. In other embodiments, different from embodiment 1, the airbag unit includes an elastic drum-shaped airbag fixed between the right vertical plate and the left vertical plate, and the elastic drum-shaped airbag structure is simpler.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A manual vacuum pump, characterized in that: It includes a circular right vertical plate, a circular left vertical plate, a piston unit, a spring and an airbag unit connecting the right vertical plate and the left vertical plate, the piston unit includes a piston cylinder, a piston sealingly slidably arranged in the piston cylinder and a piston rod fixedly connected to the center of the right side of the piston cylinder, the right vertical plate has inlet and outlet air holes connecting the left and right sides of the right vertical plate, the left end of the piston cylinder is fixed on the left vertical plate, the first air vent and the second air vent connecting the piston cylinder and the outside of the manual vacuum pump are arranged on the left vertical plate in the left and right directions, the first air vent is provided with a first one-way valve that only allows air to flow into the piston cylinder, the second air vent is provided with a second one-way valve that only allows air to flow out of the piston cylinder, the right end of the piston cylinder is provided with a baffle, the middle part of the baffle is provided with a guide hole, the piston rod guide is passed through the guide hole and the right end of the piston rod is fixed on the right vertical plate, and the spring is located between the piston and the baffle.

2. A manual vacuum pump according to claim 1, characterized in that: The airbag unit includes a plurality of three-link units evenly distributed between the right vertical plate and the left vertical plate in the circumferential direction and a drum-shaped airbag made of non-elastic material arranged on the outside of the three-link unit. The three-link unit includes a first link hinged on the left vertical plate, a second link arranged horizontally, and a third link hinged on the right vertical plate. The left end of the second link is hinged to the first link and the right end of the second link is hinged to the third link. The two ends of the drum-shaped airbag are respectively fixed on the right vertical plate and the left vertical plate, and the middle part of the drum-shaped airbag is fixed on the second link.

3. A manual vacuum pump according to claim 2, characterized in that: The middle part of the drum-shaped airbag is adhered and fixed on the second connecting rod.

4. A manual vacuum pump according to claim 3, characterized in that: The two ends of the second connecting rod are provided with connecting rings, and the middle part of the drum-shaped airbag is provided with a pull ring corresponding to the connecting ring, and the pull ring is connected and fixed to the connecting ring.

5. A manual vacuum pump according to claim 1, characterized in that: The airbag unit comprises an elastic drum-shaped airbag fixed between a right vertical plate and a left vertical plate.

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