Novel manual air pump

Abstract

The utility model relates to a novel manual sucking pump. The air cylinder is of a columnar structure provided with a vertically-through air exhaust cavity, and a sealing opening is formed in the lower end of the air cylinder. A piston component of the piston assembly is transversely arranged in an air exhaust cavity and divides the air exhaust cavity into an upper cavity and a lower cavity, the upper end of a hollow pipe is connected with the piston component, the lower end of the hollow pipe is connected with an air inlet seat, a sealing opening abuts against the outer side wall of the hollow pipe, and the air inlet seat is installed on a one-way valve. The upper cavity, the lower cavity, the hollow pipe and the air inlet base are sequentially communicated to form a coherent air pumping cavity. The piston head is embedded in the air cylinder, the sealing ring on the piston head can play a role in isolating the upper cavity from the lower cavity when the air cylinder is pressed downwards for air exhaust, and when the air cylinder is lifted upwards for air exhaust, air in the lower cavity can be extruded into the upper cavity through the air exhaust groove in the piston head. And air below the one-way valve at the lower end can be extracted under the condition of circulation, one-hand operation can be carried out, and use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air extraction, and particularly relates to a novel manual air extraction pump. BACKGROUND

[0002] In our daily life, air extraction pumps are often used to extract air from vacuum tanks or vacuum bags. The commonly used air extraction pumps include electric air extraction pumps and hand-pulled manual air extraction pumps. The electric air extraction pump needs to be disassembled and assembled with a battery. If the battery is not used for a long time, a usable battery needs to be found to be accommodated, or the battery without electricity needs to be replaced. The use process is relatively troublesome. The manual air extraction pump can be used in various scenes without power intervention. However, the user feels very tired during the reciprocating pressing and pulling process of the hand-pulled manual air extraction pump, and the use is not convenient. UTILITY MODEL CONTENTS

[0003] To solve the above technical problems, the utility model provides a novel manual air extraction pump. A piston head is embedded in a cylinder. A sealing ring on the piston head can play a role in isolating the upper and lower cavities when the cylinder is pressed downward to extract air. When the cylinder is lifted to release air, the gas in the lower cavity can be squeezed out of the upper cavity through the air release groove on the piston head. The air under the one-way valve at the lower end can be extracted in a reciprocating cycle. One-hand operation can be performed, and the use is convenient.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of:

[0005] A novel manual air extraction pump is installed on a one-way valve that flows upward. The air extraction pump comprises an air extraction assembly and a piston assembly. The air extraction assembly comprises a cylinder. The cylinder is a columnar structure provided with an air extraction cavity that penetrates upward and downward. A sealing port is arranged on the lower end of the cylinder. The piston assembly comprises a piston member, a hollow tube, and an air inlet seat. The piston member is horizontally arranged in the air extraction cavity and separates the air extraction cavity into an upper cavity and a lower cavity. The upper end of the hollow tube is connected with the piston member. The lower end of the hollow tube is connected with the air inlet seat. The sealing port is abutted on the outer sidewall of the hollow tube. A gas seal head is embedded in the sealing port. The sealing port is connected with the outer sidewall of the hollow tube through the gas seal head. The air inlet seat is installed on the one-way valve. The upper cavity, the lower cavity, the hollow tube, and the air inlet seat are sequentially connected to form a continuous pump gas cavity.

[0006] The piston assembly comprises a piston head and a sealing ring, a sealing groove for the sealing ring is arranged on the outer end edge of the piston head, the piston head is embedded in the air extraction cavity and abuts against the inner side wall of the air extraction cavity through the sealing ring, and a gas leakage groove in communication with the sealing groove is arranged on the upper end surface of the piston head; a mounting seat is arranged on the lower end surface of the piston head, a matching cavity opening downward is arranged in the mounting seat, the upper end of the hollow tube is matched in the matching cavity, a gas guide groove is arranged in the matching cavity and has an inverted U-shaped structure, and the hollow tube is in communication with the lower cavity through the gas guide groove.

[0007] The air extraction assembly further comprises a shell cover and a spring, the shell cover has a columnar structure with a matching cavity penetrating through the upper and lower parts, a limiting cavity opening downward is arranged in the matching cavity, a limiting column is arranged on the outer side wall of the air cylinder, the air cylinder is embedded in the matching cavity from the lower part to the upper part, the limiting column is matched with the limiting cavity, and the air inlet seat is detachably connected at the lower end opening of the shell cover; the spring is arranged in the matching cavity and sleeved on the outer surface of the hollow tube, the upper and lower ends of the spring are respectively abuttingly connected with the bottom of the air cylinder and the top of the air inlet seat; a locking cavity is further arranged in the limiting cavity, the locking cavity and the limiting cavity are in communication and have an L-shaped structure, and the limiting column is abuttingly connected in the locking cavity.

[0008] The novel manual air extraction pump has the following advantages: the sealing groove on the outer end edge of the piston head of the piston assembly is embedded in the sealing ring, the sealing ring abuts against the inner side wall of the air extraction cavity after the piston head is embedded in the air extraction cavity, the upper cavity, the lower cavity, the hollow tube and the air inlet seat are sequentially communicated to form a continuous pumping cavity, the gap between the sealing ring and the air extraction cavity is used for the communication between the upper cavity and the lower cavity, the sealing ring is pushed downward to move to the lower end of the sealing groove and block the gap between the sealing groove and the air extraction cavity when the air cylinder is pressed downward, the communication between the upper cavity and the lower cavity is blocked, the sliding connection between the air cylinder and the sealing ring is maintained, the sliding connection between the air seal head on the sealing port and the outer side wall of the hollow tube is maintained, air is only sucked from the gas guide groove in the mounting seat in communication with the hollow tube because the space in the lower cavity gradually increases when the air cylinder moves downward and air cannot be supplemented from the upper cavity or the air seal head in abutment with the hollow tube on the sealing port, the air in the vacuum tank or the vacuum bag installed on the lower end of the one-way valve is gradually introduced into the lower cavity through the one-way valve because the one-way valve is an upward flow structure, and thus the pumping effect is achieved.

[0009] When air needs to be released, the cylinder is pulled upwards. As the cylinder moves upwards, it moves the sealing ring to the upper end of the sealing groove and seals the gap between the sealing groove and the suction chamber. However, since the upper end of the piston head has a venting groove that communicates with the sealing groove, the sealing ring can only seal the gap between the sealing groove and the suction chamber, but cannot seal the venting groove. At this time, the upper and lower chambers are connected to each other through the venting groove. The gradually moving cylinder will cause the space in the lower chamber to gradually shrink. Since the one-way valve installed on the air inlet seat can only allow air to flow from bottom to top, and the air from top to bottom cannot re-enter the vacuum tank or vacuum bag from the one-way valve, the air in the lower chamber cannot flow downwards from the one-way valve after passing through the air guide groove, hollow tube, and air inlet seat. It can only enter the upper chamber from the venting groove and thus be discharged into the air.

[0010] To ensure the cylinder can move vertically up and down, an outer casing is added to restrict its movement. The limiting cavity inside the casing cooperates with the limiting post on the cylinder, allowing the cylinder to move only within the vertical space of the limiting cavity. To eliminate the need for manual pulling after the cylinder is pressed down, a spring is installed between the cylinder and the air inlet seat. Pressing the cylinder down compresses the spring, and releasing the cylinder causes it to be pushed upward by the spring force, allowing air to be released into the lower cavity during this process. To facilitate the storage of the vacuum pump, a locking cavity connected to the limiting cavity is provided, forming an L-shape with the limiting cavity. Therefore, when the vacuum pump needs to be stored, pressing down the cylinder moves the limiting post to the bottom of the limiting cavity, and then turning the cylinder towards the locking cavity allows the limiting post to embed into the locking cavity, locking the cylinder's position and reducing the overall size of the vacuum pump for easy storage and transport.

[0011] Furthermore, the air extraction assembly also includes a handle cover, which is detachably connected to the upper opening of the cylinder; the handle cover has a downward-opening screw-in cavity, the upper end of the cylinder is fitted into the screw-in cavity, the screw-in cavity has an air outlet groove, the air outlet groove is set in the screw-in cavity and has an inverted U-shaped structure, and the upper cavity is connected to the outside of the cylinder through the air outlet groove.

[0012] Compared with the prior art, the advantages of this utility model are as follows: the lower cylinder can pump air into the lower chamber from the one-way valve. The air in the lower chamber cannot escape from the upper chamber during the process of the sealing ring sealing the gap between the sealing groove and the suction chamber. When the cylinder is pulled up, the air in the lower chamber overflows from the venting groove, achieving the effect of exhaust. With the help of the spring and the outer shell, this structure can be pressed down with one hand and automatically pulled up when the hand is released, which is convenient to operate and does not require power intervention. The sealing ring on the piston head can be replaced in time after wear and failure, extending the service life of the manual air pump. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 This is a top-view explosion diagram of the present invention;

[0016] Figure 3 For the present utility model Figure 2 A magnified view of part A;

[0017] Figure 4 This is a bottom-view explosion diagram of the present invention;

[0018] Figure 5 For the present utility model Figure 4 A magnified view of section B;

[0019] Figure 6 This is a top view of the present invention;

[0020] Figure 7 For the present utility model Figure 6 CC section view;

[0021] Figure 8 This is a schematic diagram of the compressed state of this utility model;

[0022] Figure 9 This is a perspective view of the piston head of this utility model.

[0023] The components are as follows: 1. Suction assembly; 11. Cylinder; 111. Suction chamber; 1111. Upper chamber; 1112. Lower chamber; 112. Sealing port; 1121. Air seal head; 113. Limiting post; 12. Outer shell cover; 121. Mating cavity; 122. Limiting cavity; 123. Locking cavity; 13. Spring; 14. Handle cover; 141. Tightening cavity; 142. Air outlet groove; 2. Piston assembly; 21. Piston component; 211. Piston head; 212. Sealing ring; 213. Sealing groove; 214. Vent groove; 215. Mounting seat; 216. Fitting cavity; 217. Air guide groove; 22. Hollow tube; 23. Air inlet seat. Detailed Implementation

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.

[0025] The specific embodiments of the utility model will be described below in combination with the drawings:

[0026] As Figures 1-9 The utility model discloses a novel manual air pump, which is installed on a one-way valve for upward flow, and the one-way valve is prior art, so the effect of one-way flow is not described here, comprising an air pumping assembly 1 and a piston assembly 2, the air pumping assembly 1 comprises a cylinder 11, the cylinder 11 is a columnar structure provided with an air pumping cavity 111 penetrating through up and down, and a sealing port 112 is arranged on the lower end of the cylinder 11, the piston assembly 2 comprises a piston member 21, a hollow pipe 22 and an air inlet seat 23, the piston member 21 is transversely arranged in the air pumping cavity 111 and divides the air pumping cavity 111 into an upper cavity 1111 and a lower cavity 1112, the upper end of the hollow pipe 22 is connected with the piston member 21, the lower end of the hollow pipe 22 is connected with the air inlet seat 23, the sealing port 112 abuts against the outer side wall of the hollow pipe 22, the sealing port 112 is embedded with a gas sealing head 1121, the sealing port 112 is connected with the outer side wall of the hollow pipe 22 through the gas sealing head 1121, the air inlet seat 23 is installed on the one-way valve, and the upper cavity 1111, the lower cavity 1112, the hollow pipe 22 and the air inlet seat 23 are sequentially connected to form a continuous pumping cavity.

[0027] The piston member 21 comprises a piston head 211 and a sealing ring 212, a sealing groove 213 for sleeving the sealing ring 212 is arranged on the outer end edge of the piston head 211, the piston head 211 is embedded in the air pumping cavity 111 and abuts against the inner side wall of the air pumping cavity 111 through the sealing ring 212, and a gas discharge groove 214 in communication with the sealing groove 213 is arranged on the upper end face of the piston head 211, an installation seat 215 is arranged on the lower end face of the piston head 211, a matching cavity 216 opening downward is arranged in the installation seat 215, the upper end of the hollow pipe 22 is matched in the matching cavity 216, a gas guide groove 217 is arranged in the matching cavity 216 and has an inverted U-shaped structure, and the hollow pipe 22 is connected with the lower cavity 1112 through the gas guide groove 217.

[0028] The air extraction assembly 1 further comprises a shell cover 12 and a spring 13, the shell cover 12 is a columnar structure provided with a through upper and lower matching cavity 121, a downwardly open limiting cavity 122 is arranged in the matching cavity 121, a limiting column 113 is arranged on the outer wall of the air cylinder 11, the air cylinder 11 is embedded in the matching cavity 121 from bottom to top, the limiting column 113 is matched with the limiting cavity 122, the air inlet seat 23 is detachably connected at the lower end opening of the shell cover 12; the spring 13 is arranged in the matching cavity 121 and is sleeved on the outer wall of the hollow pipe 22, the upper and lower ends of the spring 13 are respectively abuttingly connected with the bottom of the air cylinder 11 and the top of the air inlet seat 23; a locking cavity 123 is further arranged in the limiting cavity 122, the locking cavity 123 and the limiting cavity 122 are mutually communicated and are in L-shaped structure, and the limiting column 113 is abuttingly connected in the locking cavity 123.

[0029] Further, the air extraction assembly 1 further comprises a handle cover 14, the handle cover 14 is detachably connected at the upper end opening of the shell cover 12; a downwardly open screwing cavity 141 is arranged in the handle cover 14, the upper end of the shell cover 12 is matched in the screwing cavity 141, an air outlet groove 142 is arranged in the screwing cavity 141 and is in inverted U-shaped structure, and the upper cavity 1111 is communicated with the outside of the shell cover 12 through the air outlet groove 142.

[0030] The working mode of the utility model is described as follows:

[0031] The new type of manual air pump adopts the structure, the sealing groove 213 on the outer end edge of the piston head 211 of the piston member 21 is embedded with the sealing ring 212, the sealing ring 212 abuts against the inner side wall of the air pumping cavity 111 after the piston head 211 is placed into the air pumping cavity 111, the upper cavity 1111, the lower cavity 1112, the hollow pipe 22 and the air inlet seat 23 are sequentially communicated to form a coherent pumping cavity, the gap between the sealing ring 212 and the air pumping cavity 111 is used for the communication of the upper cavity 1111 and the lower cavity 1112, when the air cylinder 11 is pressed downward, the air cylinder 11 moves downward, the sealing ring 212 is pushed downward by the piston head 211, the sealing ring 212 moves to the lower end of the sealing groove 213 and blocks the gap between the sealing groove 213 and the air pumping cavity 111, the communication between the upper cavity 1111 and the lower cavity 1112 is blocked, the air cylinder 11 and the sealing ring 212 are in sliding connection, the air seal head 1121 on the sealing port 112 is in sliding connection with the outer side wall of the hollow pipe 22, the space in the lower cavity 1112 gradually increases when the air cylinder 11 moves downward, air cannot be supplemented from the upper cavity 1111 and the air seal head 1121 on the sealing port 112 abutting against the hollow pipe 22, therefore, air can only be sucked into the air guide groove 217 on the mounting seat 215 in communication with the hollow pipe 22, air in the vacuum tank or the vacuum bag installed at the lower end of the hollow pipe 22 gradually enters the lower cavity 1112 through the one-way valve, thereby achieving the pumping effect.

[0032] When air needs to be released, the air cylinder 11 is pulled upward, the sealing ring 212 moves to the upper end of the sealing groove 213 and blocks the gap between the sealing groove 213 and the air pumping cavity 111, but the sealing ring 212 can only block the gap between the sealing groove 213 and the air pumping cavity 111 and cannot block the air release groove 214, the upper cavity 1111 and the lower cavity 1112 are in communication with each other through the air release groove 214, the space in the lower cavity 1112 gradually decreases when the air cylinder 11 moves upward, air in the lower cavity 1112 cannot flow downward from the one-way valve through the air guide groove 217, the hollow pipe 22 and the air inlet seat 23 and reenter the vacuum tank or the vacuum bag, but can only enter the upper cavity 1111 from the air release groove 214, thereby being discharged into the air.

[0033] In order to keep the cylinder 11 can carry on the vertical movement, therefore, the shell cover 12 is added to the moving direction of the cylinder 11 is limited, the limiting cavity 122 in the shell cover 12 is matched with the limiting column 113 on the cylinder 11, the cylinder 11 can only move up and down in the up and down space of the limiting cavity 122, in order to realize that the cylinder 11 does not need manual lifting after pressing down, therefore, the spring 13 is arranged between the cylinder 11 and the air inlet seat 23, when pressing down the cylinder 11, the spring 13 is compressed, after releasing the cylinder 11, the cylinder 11 is lifted up under the action force of the spring 13, so that the cylinder 11 is vented in the process of being lifted up for the lower cavity 1112, in order to facilitate the storage of the air pump, the locking cavity 123 is arranged in the limiting cavity 122 and communicates with the limiting cavity 122, so that the locking cavity 123 and the limiting cavity 122 are in L-shaped structure, therefore, when the air pump needs to be stored, the cylinder 11 is pressed down, the limiting column 113 on the cylinder 11 is moved to the bottom of the limiting cavity 122, then the cylinder 11 is twisted to the direction of the locking cavity 123, the limiting column 113 can be embedded in the locking cavity 123, the position of the cylinder 11 is locked, the size of the whole air pump is reduced, and the air pump is convenient to store and carry.

[0034] In order to avoid the sundries or dust into the upper cavity 1111, affect the sealing effect of the sealing ring 212 and the air pumping cavity 111, therefore, the twist cavity 141 of the handle cover 14 is matched with the upper end opening of the cylinder 11, in order to keep the upper cavity 1111 and the outside, the air outlet groove 142 is arranged in the twist cavity 141, the air outlet groove 142 is in inverted U-shaped structure in the twist cavity 141, so that the air flow channel is downward into the outside, the sundries and dust are difficult to enter the upper cavity 1111 from the position, so that the upper cavity 1111 can be kept clean, thereby prolonging the service life of the sealing ring 212.

[0035] The beneficial effects of the utility model lie in that: the air in the lower cavity 1112 can be pumped from the one-way valve in the lower cavity 1112 by pressing down the cylinder 11, the air in the lower cavity 1112 cannot overflow from the upper cavity 1111 in the process of sealing the gap between the sealing groove 213 and the air pumping cavity 111 by the sealing ring 212, when the cylinder 11 is lifted up, the air in the lower cavity 1112 overflows from the air vent groove 214, the exhaust effect is realized, under the cooperation of the spring 13 and the shell cover 12, the structure can be pressed down by one hand, and the cylinder 11 is lifted up automatically when the hand is released, so that the operation is convenient, and the power intervention is not needed, the sealing ring 212 on the piston head 211 can be replaced in time after wearing out, thereby prolonging the service life of the manual air pump.

[0036] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A new type of hand operated air displacement pump which is mounted on a one way valve which flows upwardly, characterized in that: The application relates to a pump assembly, which comprises a suction assembly and a piston assembly, wherein the suction assembly comprises a cylinder which is a columnar structure provided with a through suction cavity, the lower end of the cylinder is provided with a sealing port; the piston assembly comprises a piston member, a hollow pipe and an air inlet seat, the piston member is horizontally arranged in the suction cavity and separates the suction cavity into an upper cavity and a lower cavity, the upper end of the hollow pipe is connected with the piston member, the lower end of the hollow pipe is connected with the air inlet seat, the sealing port is abutted on the outer sidewall of the hollow pipe, the air inlet seat is installed on a one-way valve, and the upper cavity, the lower cavity, the hollow pipe and the air inlet seat are sequentially communicated to form a continuous pumping cavity.

2. The new type of hand vacuum pump according to claim 1, characterized in that: The piston member comprises a piston head and a sealing ring, the outer end edge of the piston head is provided with a sealing groove for sleeving the sealing ring, the piston head is embedded in the suction cavity and abutted on the inner sidewall of the suction cavity through the sealing ring, and the upper end surface of the piston head is provided with a gas discharge groove communicated with the sealing groove.

3. The new type of hand vacuum pump according to claim 2, characterized in that: The lower end surface of the piston head is provided with a mounting seat, the mounting seat is provided with a downwardly-opened embedding cavity, the upper end of the hollow pipe is fitted in the embedding cavity, the embedding cavity is provided with a gas guide groove, the gas guide groove is arranged in the embedding cavity and has an inverted U-shaped structure, and the hollow pipe is communicated with the lower cavity through the gas guide groove.

4. The new type of hand vacuum pump according to claim 3, characterized in that: The sealing port is embedded with a gas sealing head, and the sealing port is connected with the outer sidewall of the hollow pipe through the gas sealing head.

5. The new type of hand vacuum pump according to claim 4, characterized in that: The suction assembly further comprises an outer shell cover which is a columnar structure provided with a through cooperation cavity, the cooperation cavity is provided with a downwardly-opened limiting cavity, the outer sidewall of the cylinder is provided with a limiting column, the cylinder is embedded in the cooperation cavity from the lower end to the upper end, the limiting column is matched with the limiting cavity, and the air inlet seat is detachably connected at the lower end opening of the outer shell cover.

6. The new type of hand vacuum pump according to claim 5, characterized in that: The suction assembly further comprises a spring, the spring is arranged in the cooperation cavity and sleeved on the outer side of the hollow pipe, and the upper and lower ends of the spring are respectively abutted on the bottom of the cylinder and the top of the air inlet seat.

7. The new type of hand vacuum pump according to claim 6, characterized in that: The limiting cavity is further provided with a locking cavity, the locking cavity is communicated with the limiting cavity and has an L-shaped structure, and the limiting column is abutted in the locking cavity.

8. The new type of hand vacuum pump according to claim 7, characterized in that: The suction assembly further comprises a handle cover which is detachably connected at the upper end opening of the cylinder.

9. The new type of hand vacuum pump according to claim 8, characterized in that: The handle cover is provided with a downwardly-opened screwing cavity, the upper end of the cylinder is fitted in the screwing cavity, the screwing cavity is provided with an air outlet groove, the air outlet groove is arranged in the screwing cavity and has an inverted U-shaped structure, and the upper cavity is communicated with the cylinder outside through the air outlet groove.

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