Knob type air pump for inflation and deflation

Abstract

The invention relates to a knob type air pump for inflation and deflation, which comprises a pump shell with an inner cavity, the front side of the pump shell is provided with an inflation and deflation port in butt joint with an inflation product, the pump shell is further provided with an air inlet and outlet port communicated with the external environment, and the top side of the pump shell is further provided with a knob; the one-way valve comprises a valve seat and a valve core; the rear end of the valve core penetrates through the valve seat, and the front end is provided with a diaphragm; the valve element has the freedom degree of front-back movement relative to the valve seat. The mounting frame is fixed in an inner cavity of the pump shell; the air blowing assembly is fixed to the mounting frame; the rotary reversing assembly is used for switching the air flowing direction; the rotary reversing assembly comprises a rotary reversing block connected with the rotary knob. One end of the connecting rod is hinged to the eccentric position of the rotary reversing block, and the other end is hinged to the rear end of the valve element. Air channels are switched in a rotating mode, and meanwhile the one-way valve is opened or closed through transmission of the connecting rod in the rotating process; the structure is stable and reliable, and air leakage caused by the fact that the one-way valve cannot be completely closed is avoided.

Description

Technical Field

[0001] The invention relates to the field of air pumps, in particular to a knob-type air pump for inflation and deflation. Background Art

[0002] Inflatable products are increasingly being used, such as inflatable beds, inflatable swimming pools, inflatable cushions, etc. These inflatable products all need to be inflated for use, and also need to be deflated for folding and storage. To inflate inflatable products, a manual air pump is generally used, or an electric air pump is used for inflating. The inflation process is generally operated by connecting the air pump to the air nozzle of the inflatable product. To deflate inflatable products, the air nozzle of the inflatable product is generally opened to allow the inflatable product to deflate naturally.

[0003] Existing air pumps can also have the functions of inflation and suction at the same time. They switch between inflation and deflation by pressing or rotating the corresponding control knob with fingers to control the corresponding mechanical structure changes; at the same time, the valve plate of the one-way valve of the air pump is pushed open when inflating or deflation, and is closed under the action of the internal and external air pressure difference and the return spring when inflation or deflation stops. However, when the internal and external air pressure difference is small, the valve plate cannot be completely closed, and the return spring is prone to failure due to quality, life and other issues, which causes air leakage in inflatable products. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a knob-type air pump for inflation and deflation, which switches the airway by rotation. At the same time, a connecting rod is used to open or close the one-way valve during the rotation. The structure is stable and reliable, and air leakage caused by the failure of the one-way valve to be completely closed is eliminated.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a knob-type air pump for inflation and deflation, comprising:

[0006] The pump housing has an inner cavity, the front side of the pump housing is provided with a charging and discharging port for docking with the inflatable product, the pump housing also has an inlet and outlet port communicating with the external environment, and the top side of the pump housing is also provided with a knob;

[0007] A one-way valve comprises a valve seat and a valve core arranged in the gas charging and discharging port; the rear end of the valve core passes through the valve seat, and a diaphragm is installed at the front end; the valve core has the freedom to move forward and backward relative to the valve seat; the diaphragm is used to open the gas charging and discharging port when the valve core is driven forward, or to close the gas charging and discharging port when the valve core is driven backward;

[0008] A mounting frame fixed to the inner cavity of the pump casing;

[0009] The air blowing assembly is fixed to the mounting frame and is used to provide power for air flow;

[0010] The rotary reversing assembly is used to switch the air flow direction, and then use the air blowing assembly to achieve inflation or deflation; the rotary reversing assembly includes a rotary reversing block connected to the knob;

[0011] A connecting rod, one end of which is hinged to the eccentric part of the rotating reversing block, and the other end is hinged to the rear end of the valve core. The connecting rod is used to pull the valve core backward under the drive of the rotating end to make the diaphragm close the charging and discharging ports, so that the air pump is in a closed state, or to push the valve core forward to make the diaphragm open the charging and discharging ports, so that the air pump is in an inflating state or a deflated state.

[0012] Furthermore, the pump housing includes a housing seat and an upper cover installed on the top side of the housing seat; the knob is installed on the upper cover; the upper cover is provided with a knob installation area at a position corresponding to the knob, and a mounting hole is provided in the central area of ​​the knob installation area; the knob includes a knob body, which has a claw, and the knob body is clamped with the upper cover through the mounting hole through the claw, so that the knob has only rotational freedom relative to the upper cover; the mounting hole serves as an air inlet and outlet; and a vent is provided on the knob body.

[0013] Furthermore, a ball plunger is provided on the bottom side of the knob body; three grooves are provided in the knob installation area on the moving path of the ball plunger; the three grooves cooperate with the ball plunger to provide rotational positioning for the knob, and the positioning includes inflated state positioning, closed state positioning, and deflated state positioning.

[0014] Furthermore, the knob body also has a rotation limit portion, and the knob installation area is provided with limit protrusions at both ends of the moving path of the rotation limit portion, and the rotation limit portion cooperates with the two limit protrusions to enable the knob to rotate only between the inflated state and the deflated state.

[0015] Furthermore, the rotary reversing assembly comprises a fixed cylinder arranged on a mounting frame; the fixed cylinder has a cylindrical cylinder cavity, and the cylindrical cylinder cavity is circumferentially distributed with a first air port connected to the charging and discharging air port, a second air port connected to the outlet end of the blowing channel of the blowing assembly, and four air ports connected to the inner cavity of the pump casing; the rotary reversing block is installed in the cylindrical cylinder cavity and matches the cylindrical cylinder cavity; the rotary reversing block cooperates with the fixed cylinder to switch the air flow direction.

[0016] Furthermore, the top end of the rotary reversing block is connected to the knob; one end of the connecting rod is hinged to the eccentric point of the bottom end of the rotary reversing block, and the other end of the connecting rod passes through the first air port and is hinged to the rear end of the valve core.

[0017] Furthermore, the rotating reversing block includes a first flow channel and a second flow channel separated by a partition; the first flow channel is provided with an opening in the circumferential direction of the rotating reversing block; the second flow channel is provided with an opening in the circumferential direction of the rotating reversing block, and the top side of the second flow channel is provided with an opening corresponding to the inlet and exhaust ports; in the inflated state, the first flow channel connects the first air port and the second air port, and the second flow channel connects the third air port and the inlet and exhaust ports; in the deflated state, the first flow channel connects the first air port and the third air port, and the second flow channel connects the second air port and the inlet and exhaust ports.

[0018] Furthermore, a protruding first trigger end and a second trigger end are circumferentially arranged near the top end on the circumferential side of the rotating reversing block; a micro switch is arranged on the mounting frame near the moving path of the first trigger end and the second trigger end; in the inflated state, the first trigger end maintains the state of triggering the micro switch, and the blower assembly maintains the working state; in the deflated state, the second trigger end maintains the state of triggering the micro switch, and the blower assembly maintains the working state; in the closed state, the micro switch is not triggered, and the blower assembly is in a stopped working state.

[0019] Furthermore, a first connecting portion is provided on the top side of the rotary reversing block; the first connecting portion has a cross slot; and the knob has a cross plug that matches the cross slot.

[0020] Furthermore, the pump housing is provided with a mesh cover on the outside of the gas charging and discharging ports.

[0021] Advantages of the present invention: The knob-type air pump for inflation and deflation of the present invention switches the airway by rotation, and at the same time, utilizes connecting rod transmission to open or close the one-way valve during the rotation; the structure is stable and reliable, and the air leakage caused by the failure of the one-way valve to be completely closed is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0023] Figure 2 A right side schematic diagram of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of an explosion state of a knob-type air pump for inflation and deflation in an embodiment;

[0025] Figure 4 It is a three-dimensional schematic diagram of the connection of a one-way valve, a connecting rod, and a rotary reversing block of a knob-type air pump for inflation and deflation in an embodiment;

[0026] Figure 5 It is a three-dimensional schematic diagram of the assembly of a valve core and a diaphragm of a one-way valve of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0027] Figure 6 It is a three-dimensional schematic diagram of a mounting frame and a fixing cylinder of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0028] Figure 7 It is a three-dimensional schematic diagram of a rotary reversing block of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0029] Figure 8 It is a three-dimensional schematic diagram of another angle of a rotary reversing block of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0030] Fig. 9 It is a schematic diagram of the internal structure of a rotary reversing block of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0031] Fig.10 It is a three-dimensional schematic diagram of a knob of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0032] Fig.11 It is a three-dimensional schematic diagram of an upper cover of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0033] Fig.12 In closed state Figure 2 AA cross-sectional view of ;

[0034] Fig.13 In closed state Figure 2 BB cross-sectional view;

[0035] Fig.14 In closed state Figure 2 Schematic diagram of CC cross-section;

[0036] Fig.15 In closed state Figure 2 DD cross-sectional diagram;

[0037] Fig.16 It is a schematic diagram of the internal structure of a knob-type air pump for inflation and deflation in a closed state according to an embodiment of the present invention;

[0038] Fig.17 Inflated Figure 2 AA cross-sectional view of ;

[0039] Fig.18 Inflated Figure 2 BB cross-sectional view;

[0040] Fig.19 Inflated Figure 2 Schematic diagram of CC cross-section;

[0041] Fig. 20Inflated Figure 2 DD cross-sectional diagram;

[0042] Fig.21 A schematic diagram of the internal structure of a knob-type air pump for inflation and deflation in an inflated state according to an embodiment;

[0043] Fig. 22 In deflated state Figure 2 AA cross-sectional view of ;

[0044] Fig.23 In deflated state Figure 2 BB cross-sectional view;

[0045] Fig.24 In deflated state Figure 2 Schematic diagram of CC cross-section;

[0046] Fig.25 In deflated state Figure 2 DD cross-sectional diagram;

[0047] Fig.26 A schematic diagram of the internal structure of a knob-type air pump for inflation and deflation in a deflation state in an embodiment;

[0048] Among them, 1-pump housing, 2-check valve, 3-mounting frame, 4-blowing assembly, 5-fixed cylinder, 6-rotation reversing block, 7-connecting rod, 8-micro switch, 9-net cover, 11-shell seat, 12-upper cover, 13-knob, 14-charge and discharge port, 111-inner cavity, 121-knob installation area, 122-installation hole, 123-groove, 124-limiting protrusion, 131-knob body, 132-claw, 1 33-cross plug, 134-vent, 135-ball plunger, 136-rotation limiter, 21-diaphragm, 22-valve seat, 23-valve core, 41-air blast channel, 51-cylindrical cylinder cavity, 52-first air port, 53-second air port, 54-third air port, 61-partition, 62-first channel, 63-second channel, 64-first connecting portion, 65-first trigger end, 66-second trigger end. DETAILED DESCRIPTION

[0049] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0050] Example

[0051] Please refer to Figures 1 to 26As shown, this embodiment provides a knob-type air pump for inflation and deflation, comprising: a pump housing 1, having an inner cavity 111, a front side of the pump housing 1 is provided with an inflation and deflation port 14 connected to an inflatable product, the pump housing 1 also has an inlet and outlet port connected to the external environment, and a knob 13 is also provided on the top side of the pump housing 1; a one-way valve 2, comprising a valve seat 22 and a valve core 23 arranged in the inflation and deflation port 14; the rear end of the valve core passes through the valve seat 22, and a diaphragm 21 is installed at the front end; the valve core 23 has the freedom to move forward and backward relative to the valve seat 22; the diaphragm 21 is used to open the inflation and deflation port 14 under the forward drive of the valve core 23, or to close the inflation and deflation port 14 under the backward drive of the valve core 23; The mounting frame 3 is fixed to the inner cavity 111 of the pump housing 1; the blowing assembly 4 is fixed to the mounting frame 3 and is used to provide power for air flow; the rotating reversing assembly is used to switch the direction of air flow, and then use the blowing assembly 4 to achieve inflation or deflation; the rotating reversing assembly includes a rotating reversing block 6 connected to the knob 13; a connecting rod 7, one end of the connecting rod 7 is hinged to the eccentric part of the rotating reversing block, and the other end is hinged to the rear end of the valve core 23, and the connecting rod 7 is used to pull the valve core backward under the drive of the rotating end so that the diaphragm 21 closes the charging and discharging port 14, so that the air pump is in a closed state, or push the valve core forward so that the diaphragm 21 opens the charging and discharging port 14, so that the air pump is in an inflation state or a deflation state.

[0052] Refer to Figure 3 , Fig.10 and Fig.11 As shown, the pump housing 1 includes a housing seat 11 and an upper cover 12 installed on the top side of the housing seat 11; the knob 13 is installed on the upper cover 12; the upper cover 12 is provided with a knob installation area 121 at a position corresponding to the knob 13, and a mounting hole 122 is provided in the central area of ​​the knob installation area 121; the knob 13 includes a knob body 131, which has a claw 132, and the knob body 131 is clamped with the upper cover 12 through the mounting hole 122 through the claw 132, so that the knob 13 has only rotational freedom relative to the upper cover 12; the mounting hole 122 serves as an air inlet and outlet; and a vent 134 is provided on the knob body 131.

[0053] Refer to Fig.10 , Fig.11 , Fig.12 , Fig.17 , Fig. 22 As shown, a ball plunger 135 is also provided on the bottom side of the knob body 131; the knob mounting area 121 is provided with three grooves 123 on the moving path of the ball plunger 135; the three grooves 123 cooperate with the ball plunger 135 to provide rotational positioning for the knob, and the positioning includes inflated state positioning, closed state positioning, and deflated state positioning.

[0054] Refer to Fig.10 , Fig.11 , Fig.12 , Fig.17 , Fig. 22 As shown, the knob body 131 also has a rotation limit portion 136, and the knob installation area 121 is provided with limit protrusions 124 at both ends of the moving path of the rotation limit portion 136, and the rotation limit portion 136 cooperates with the two limit protrusions 124 to enable the knob 13 to rotate only between the inflated state and the deflated state.

[0055] Refer to Figure 3 , Figure 6 , Figure 7 , Fig.15 As shown, the rotary reversing assembly includes a fixed cylinder 5 arranged on the mounting frame 3; the fixed cylinder 5 has a cylindrical cylinder cavity 51, and the cylindrical cylinder cavity 51 is circumferentially distributed with a first air port 52 connected to the charging and discharging air port 14, a second air port 53 connected to the outlet end of the blowing channel 41 of the blowing assembly 4, and a third air port 54 connected to the inner cavity 111 of the pump housing 1; the rotary reversing block 6 is installed in the cylindrical cylinder cavity 51 and matches the cylindrical cylinder cavity 51; the rotary reversing block 6 cooperates with the fixed cylinder 5 to switch the air flow direction.

[0056] Refer to Figure 4 , Figure 7 and Figure 8 As shown, the top end of the rotating reversing block 6 is connected to the knob 13 ; one end of the connecting rod 7 is hinged to the eccentric position of the bottom end of the rotating reversing block 6 , and the other end of the connecting rod 7 passes through the first air port 52 and is hinged to the rear end of the valve core 23 .

[0057] Refer to Figure 7 , Figure 8 , Fig. 20 , Fig.21 , Fig.25 and Fig.26 As shown, the rotating reversing block 6 includes a first flow channel 62 and a second flow channel 63 separated by a partition 61; the first flow channel 62 is provided with an opening in the circumferential direction of the rotating reversing block 6; the second flow channel 62 is provided with an opening in the circumferential direction of the rotating reversing block 6, and the top side of the second flow channel 62 is provided with an opening corresponding to the inlet and exhaust ports; in the inflated state, the first flow channel 62 connects the first air port 52 and the second air port 53, and the second flow channel 63 connects the third air port 54 and the inlet and exhaust ports; in the deflated state, the first flow channel 62 connects the first air port 52 and the third air port 54, and the second flow channel 63 connects the second air port 53 and the inlet and exhaust ports.

[0058] Refer to Figure 3 , Figure 7 , Figure 8 , Fig.13 , Fig.18 and Fig.23As shown, the rotating reversing block 6 is provided with a protruding first trigger end 65 and a second trigger end 66 along the circumferential direction near the top end on the circumferential side; a micro switch 8 is provided on the mounting frame 3 near the moving path of the first trigger end 65 and the second trigger end 66; in the inflated state, the first trigger end 65 keeps triggering the micro switch 8, and the blower assembly 4 keeps working; in the deflated state, the second trigger end 66 keeps triggering the micro switch 8, and the blower assembly 4 keeps working; in the closed state, the micro switch 8 is not triggered, and the blower assembly 4 is in a stopped working state.

[0059] Refer to Figure 7 and Fig.10 As shown, a first connecting portion 64 is provided on the top side of the rotating reversing block 6; the first connecting portion 64 has a cross slot; and the knob 13 has a cross plug 133 matching the cross slot.

[0060] Refer to Figure 1 and Figure 3 As shown, the pump housing 1 is further provided with a mesh cover 9 on the outer side of the gas charging and discharging port 14 .

[0061] The present embodiment is a knob-type air pump for inflation and deflation. When it is necessary to inflate an inflatable product, refer to Figures 17 to 21 As shown, turn the knob to the inflation position, and the ball plunger of the knob is stuck in the groove positioned in the inflation state. The rotary reversing block rotates with the knob, so that the first flow channel connects the charging and discharging ports and the outlet end of the air blasting channel, and the second flow channel connects the air inlet and exhaust ports and the inner cavity of the pump housing, thereby connecting the air inlet and exhaust ports with the inlet end of the air blasting channel; with the rotation of the rotary reversing block, the connecting rod drives the valve core of the one-way valve to move forward along the valve seat, thereby disengaging the diaphragm from the charging and discharging ports; at the same time, the micro switch is triggered by the first trigger end, and the air blasting assembly works. Under the action of the air blasting assembly, air enters the inner cavity of the pump housing from the air inlet and exhaust ports through the second flow channel, and then enters the air blasting channel, and is output from the charging and discharging ports after passing through the first flow channel, thereby achieving inflation of the inflatable product. When inflation is completed, refer to Figures 12 to 16 As shown, turn the knob to the closed position, the knob's ball plunger is stuck in the closed position groove, the rotary reversing block rotates with the knob, the connecting rod drives the valve core of the one-way valve to move backward along the valve seat, and then the diaphragm closes the charging and discharging ports. At the same time, the first trigger end is separated from the micro switch, and the air blowing assembly stops working. When it is necessary to deflate the inflatable product, refer to Figure 22 to Figure 26As shown, turn the knob to the deflation position, and the ball plunger of the knob is stuck in the groove positioned in the deflation state. The rotary reversing block rotates with the knob, so that the first flow channel connects the charging and discharging ports and the inner cavity of the pump housing, and then the charging and discharging ports are connected with the inlet end of the blast flow channel, and the second flow channel connects the inlet and exhaust ports and the outlet end of the blast flow channel; with the rotation of the rotary reversing block, the connecting rod drives the valve core of the one-way valve to move forward along the valve seat, thereby separating the diaphragm from the charging and discharging ports; at the same time, the micro switch is triggered by the first trigger end, and the blast assembly works. Under the action of the pressure difference between the blast assembly and the inflated product, the air enters the inner cavity of the pump housing from the charging and discharging ports through the first flow channel, and then enters the blast flow channel, and is discharged from the inlet and exhaust ports after passing through the second flow channel, thereby achieving the deflation of the abandoned gas product. When the deflation is completed, continue to refer to Figures 12 to 16 Turn the knob to the off position to shut off the air pump.

[0062] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion shall fall within the protection scope of the present invention.

Claims

1. A knob-type air pump for inflation and deflation, characterized in that: The air pump includes: The pump housing has an inner cavity, the front side of the pump housing is provided with a charging and discharging port for docking with the inflatable product, the pump housing also has an inlet and outlet port communicating with the external environment, and the top side of the pump housing is also provided with a knob; A one-way valve comprises a valve seat and a valve core arranged in the gas charging and discharging port; the rear end of the valve core passes through the valve seat, and a diaphragm is installed at the front end; the valve core has the freedom to move forward and backward relative to the valve seat; the diaphragm is used to open the gas charging and discharging port when the valve core is driven forward, or to close the gas charging and discharging port when the valve core is driven backward; A mounting frame fixed to the inner cavity of the pump casing; The air blowing assembly is fixed to the mounting frame and is used to provide power for air flow; The rotary reversing assembly is used to switch the air flow direction, and then use the air blowing assembly to achieve inflation or deflation; the rotary reversing assembly includes a rotary reversing block connected to the knob; A connecting rod, one end of which is hinged to the eccentric part of the rotating reversing block, and the other end is hinged to the rear end of the valve core. The connecting rod is used to pull the valve core backward under the drive of the rotating end to make the diaphragm close the charging and discharging ports, so that the air pump is in a closed state, or to push the valve core forward to make the diaphragm open the charging and discharging ports, so that the air pump is in an inflating state or a deflated state.

2. A knob-type air pump for inflation and deflation according to claim 1, characterized in that: The pump housing includes a housing seat and an upper cover installed on the top side of the housing seat; the knob is installed on the upper cover; the upper cover is provided with a knob installation area at a position corresponding to the knob, and a mounting hole is provided in the central area of ​​the knob installation area; the knob includes a knob body, which has a claw, and the knob body is clamped with the upper cover through the mounting hole through the claw, so that the knob has only rotational freedom relative to the upper cover; the mounting hole serves as an air inlet and outlet; and a vent is provided on the knob body.

3. A knob-type air pump for inflation and deflation according to claim 2, characterized in that: A ball plunger is also provided on the bottom side of the knob body; three grooves are provided in the knob installation area on the moving path of the ball plunger; the three grooves cooperate with the ball plunger to provide rotational positioning for the knob, and the positioning includes inflated state positioning, closed state positioning, and deflated state positioning.

4. A knob-type air pump for inflation and deflation according to claim 2, characterized in that: The knob body also has a rotation limiting portion, and the knob installation area is provided with limiting protrusions at both ends of the moving path of the rotation limiting portion. The rotation limiting portion cooperates with the two limiting protrusions to enable the knob to rotate only between the inflated state and the deflated state.

5. A knob-type air pump for inflation and deflation according to any one of claims 1 to 4, characterized in that: The rotary reversing assembly comprises a fixed cylinder arranged on a mounting frame; a cylindrical cylinder cavity is provided in the fixed cylinder, and a first air port connected with the charging and discharging air port, a second air port connected with the outlet end of the blowing channel of the blowing assembly, and a third air port connected with the inner cavity of the pump housing are distributed on the circumference of the cylindrical cylinder cavity; the rotary reversing block is installed in the cylindrical cylinder cavity and matches the cylindrical cylinder cavity; the rotary reversing block cooperates with the fixed cylinder to switch the air flow direction.

6. A knob-type air pump for inflation and deflation according to claim 5, characterized in that: The top end of the rotating reversing block is connected to the knob; one end of the connecting rod is hinged to the eccentric position of the bottom end of the rotating reversing block, and the other end of the connecting rod passes through the first air port and is hinged to the rear end of the valve core.

7. A knob-type air pump for inflation and deflation according to claim 5, characterized in that: The rotating reversing block includes a first flow channel and a second flow channel separated by a partition; the first flow channel is provided with an opening in the circumferential direction of the rotating reversing block; the second flow channel is provided with an opening in the circumferential direction of the rotating reversing block, and the top side of the second flow channel is provided with an opening corresponding to the inlet and exhaust ports; in the inflated state, the first flow channel connects the first air port and the second air port, and the second flow channel connects the third air port and the inlet and exhaust ports; in the deflated state, the first flow channel connects the first air port and the third air port, and the second flow channel connects the second air port and the inlet and exhaust ports.

8. The knob-type air pump for inflation and deflation according to claim 5, characterized in that: The rotating reversing block is provided with a protruding first trigger end and a second trigger end along the circumferential direction near the top end on the circumferential side; a micro switch is provided on the mounting frame near the moving path of the first trigger end and the second trigger end; in the inflated state, the first trigger end keeps triggering the micro switch, and the blower assembly keeps working; in the deflated state, the second trigger end keeps triggering the micro switch, and the blower assembly keeps working; in the closed state, the micro switch is not triggered, and the blower assembly is in a stopped working state.

9. The knob-type air pump for inflation and deflation according to claim 5, characterized in that: A first connecting portion is arranged on the top side of the rotating reversing block; the first connecting portion has a cross slot; and the knob has a cross plug column matching the cross slot.

10. The knob-type air pump for inflation and deflation according to claim 1, characterized in that: The pump housing is also provided with a mesh cover on the outer side of the gas charging and discharging port.

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