Knob type air pump for inflation and deflation

Abstract

The utility model relates to a knob type air pump for inflating and deflating, which comprises a pump shell, a rotary knob, an air inlet, an air outlet and an air outlet, the pump shell is provided with an inner cavity, the front side of the pump shell is provided with an inflating and deflating port in butt joint with an inflating product, the pump shell is further provided with an air inlet and exhaust port communicated with the external environment, and the top side of the pump shell is further provided with the rotary 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 utility model 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 becoming increasingly common, such as air beds, inflatable pools, and inflatable mattresses. These products all require inflation for use and deflation for folding and storage. Inflating these products is currently typically done with a manual air pump or an electric air pump. The inflation process is typically performed by connecting the air pump to the inflatable product's nozzle. Deflation is typically achieved by opening the nozzle and allowing the product to deflate naturally.

[0003] Existing air pumps can also simultaneously inflate and deflate. This switching is achieved by pressing or rotating a control knob, which in turn controls the corresponding mechanical structure. The valve plate of the pump's one-way valve is pushed open during inflation or deflation, and closes when inflation or deflation stops due to the pressure differential between the inside and outside air and a return spring. However, when the pressure differential is low, the valve plate cannot fully close. Furthermore, the return spring is prone to failure due to quality and life issues, which can cause air leaks in inflatable products. Utility Model Content

[0004] In order to solve the above technical problems, the utility model 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 process. The structure is stable and reliable, eliminating air leakage caused by the failure of the one-way valve to be completely closed.

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

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

[0007] A one-way valve comprises a valve seat and a valve core disposed within the gas charging and discharging ports. The rear end of the valve core passes through the valve seat, and a diaphragm is mounted on the front end. The valve core is free to move forward and backward relative to the valve seat. The diaphragm is used to open the gas charging and discharging ports when the valve core moves forward, or to close the gas charging and discharging ports when the valve core moves backward.

[0008] A mounting bracket, 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 direction of air flow, thereby achieving inflation or deflation using the blower assembly; 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 point 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 inflated 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 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.

[0015] Furthermore, the rotary reversing assembly includes a fixed cylinder arranged on a mounting frame; a cylindrical cylinder cavity is provided in the fixed cylinder, and 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 are distributed circumferentially; 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 direction of air flow.

[0016] Furthermore, the top 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 provided near the top end on the circumferential side of the rotating reversing block; 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 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 rotation 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 air charging and discharging ports.

[0021] Advantages of the utility model: The utility model is a knob-type air pump for inflation and deflation, which switches the airway by rotation. At the same time, the one-way valve is opened or closed by connecting rod transmission during the rotation process; the structure is stable and reliable, and the air leakage caused by the one-way valve not being able to be completely closed is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 1 is a schematic right side view of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of an explosion state of a knob-type air pump for inflation and deflation according to an embodiment;

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

[0026] Figure 5 This 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;

[0027] Figure 6 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 1 is a perspective 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 A schematic perspective view of a rotary reversing block of a knob-type air pump for inflation and deflation according to an embodiment of the present invention from another angle;

[0030] Figure 9 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;

[0031] Figure 10 1 is a perspective schematic diagram of a knob of a knob-type air pump for inflation and deflation according to an embodiment of the present invention;

[0032] Figure 11 1 is a perspective 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] Figure 12 In closed state Figure 2 AA cross-sectional view of ;

[0034] Figure 13 In closed state Figure 2 BB cross-sectional diagram;

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

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

[0037] Figure 16 This 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;

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

[0039] Figure 18 Inflated state Figure 2 BB cross-sectional diagram;

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

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

[0042] Figure 21 This is 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] Figure 22 In deflated state Figure 2 AA cross-sectional view of ;

[0044] Figure 23 In deflated state Figure 2 BB cross-sectional diagram;

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

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

[0047] Figure 26 This is a schematic diagram of the internal structure of a knob-type air pump for inflation and deflation in a deflation state according to an embodiment;

[0048] Among them, 1- pump housing, 2- one-way valve, 3- mounting bracket, 4- blower assembly, 5- fixed cylinder, 6- rotary reversing block, 7- connecting rod, 8- micro switch, 9- mesh cover, 11- shell seat, 12- upper cover, 13- knob, 14- charging and discharging port, 111- inner cavity, 121- knob installation area, 122- mounting hole, 123- groove, 124- limit 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 flow channel, 51-cylindrical cylinder cavity, 52-first air port, 53-second air port, 54-third air port, 61-partition, 62-first flow channel, 63-second flow channel, 64-first connecting part, 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 described in further 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 scope of protection 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 charging and discharging port 14 for docking with an inflatable product is provided on the front side of the pump housing 1, the pump housing 1 also has an inlet and outlet port connected to the external environment, and a knob 13 is further 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 provided in the charging and discharging 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 charging and discharging port 14 when the valve core 23 is driven forward, or to close the charging and discharging port 14 when the valve core 23 is driven backward; 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 rotary reversing assembly is used to switch the direction of air flow, and then use the blowing assembly 4 to achieve inflation or deflation; the rotary reversing assembly includes a rotary reversing block 6 connected to the knob 13; the connecting rod 7, one end of the connecting rod 7 is hinged to the eccentric point of the rotary 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 to make the diaphragm 21 close the charging and discharging port 14, so that the air pump is in a closed state, or push the valve core forward to make the diaphragm 21 open the charging and discharging port 14, so that the air pump is in an inflated state or a deflated state.

[0052] Refer again Figure 3 、 Figure 10 and Figure 11 As shown, the pump housing 1 includes a housing base 11 and an upper cover 12 installed on the top side of the housing base 11; the knob 13 is installed on the upper cover 12; the upper cover 12 is provided with a knob mounting area 121 at a position corresponding to the knob 13, and a mounting hole 122 is provided in the central area of ​​the knob mounting area 121; the knob 13 includes a knob body 131, which has a claw 132, and the knob body 131 is engaged 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 hole 134 is provided on the knob body 131.

[0053] Refer again Figure 10 、 Figure 11 、 Figure 12 、 Figure 17 、 Figure 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 again Figure 10 、 Figure 11 、 Figure 12 、 Figure 17 、 Figure 22 As shown, the knob body 131 also has a rotation limiting portion 136, and the knob installation area 121 is respectively provided with limiting protrusions 124 at both ends of the moving path of the rotation limiting portion 136. The rotation limiting portion 136 cooperates with the two limiting protrusions 124 to enable the knob 13 to rotate only between the inflated state and the deflated state.

[0055] Refer again Figure 3 、 Figure 6 、 Figure 7 、 Figure 15 As shown, the rotary reversing assembly includes a fixed cylinder 5 arranged on the mounting frame 3; a cylindrical cylinder cavity 51 is provided in the fixed cylinder 5, and 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 are distributed on the circumference of the cylindrical cylinder cavity 51; 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 direction of air flow.

[0056] Refer again Figure 4 、 Figure 7 and Figure 8 As shown, the top of the rotary reversing block 6 is connected to the knob 13; one end of the connecting rod 7 is hinged to the eccentric point of the bottom end of the rotary 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 again Figure 7 、 Figure 8 、 Figure 20 、 Figure 21 、 Figure 25 and Figure 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 air inlet and exhaust port; 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 air inlet and exhaust port; 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 air inlet and exhaust port.

[0058] Refer again Figure 3 、 Figure 7 、 Figure 8 、 Figure 13 、 Figure 18 and Figure 23As shown, a protruding first trigger end 65 and a second trigger end 66 are circumferentially provided near the top end on the circumferential side of the rotary reversing block 6; 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 again Figure 7 and Figure 10 As shown, a first connecting portion 64 is provided on the top side of the rotary 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 again Figure 1 and Figure 3 As shown, the pump housing 1 is further provided with a mesh cover 9 on the outside 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 rotation of the knob, so that the first flow channel connects the inflation port and the outlet end of the blast flow channel, and the second flow channel connects the air inlet and exhaust port and the inner cavity of the pump housing, thereby connecting the air inlet and exhaust port with the inlet 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 inflation port; at the same time, the micro switch is triggered by the first trigger end, and the blast assembly works. Under the action of the blast assembly, air enters the inner cavity of the pump housing from the inflation port through the second flow channel, and then enters the blast flow channel, and is output from the inflation port 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 groove positioned in the closed state, and the rotary reversing block rotates with the knob, and the connecting rod drives the valve core of the one-way valve to move backward along the valve seat, thereby closing the diaphragm and closing the charging and discharging ports. At the same time, the first trigger end is disengaged from the micro switch, and the air blowing assembly stops working. When it is necessary to deflate the inflatable product, refer to Figures 22 to 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 rotation of 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 inside and outside of 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 waste gas product. When the deflation is completed, continue to refer to Figures 12 to 16 Turn the knob to the off position to turn 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 fall within the protection scope of the present invention.

Claims

1. A knob-type air pump for inflation and deflation, characterized by: The air pump includes: The pump housing has an inner cavity, a front side of the pump housing is provided with an air filling and discharging port for docking with the inflatable product, an air inlet and outlet connected to the external environment, and a knob is provided on the top side of the pump housing; A one-way valve comprises a valve seat and a valve core disposed within the gas charging and discharging ports. The rear end of the valve core passes through the valve seat, and a diaphragm is mounted on the front end. The valve core is free to move forward and backward relative to the valve seat. The diaphragm is used to open the gas charging and discharging ports when the valve core moves forward, or to close the gas charging and discharging ports when the valve core moves backward. A mounting bracket, 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 direction of air flow, thereby achieving inflation or deflation using the blower assembly; 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 point 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 inflated 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, which positioning includes inflated state positioning, closed state positioning, and deflated state positioning.

4. The knob-type air pump for inflation and deflation according to claim 2, characterized in that: The knob body also has a rotation limit portion, and the knob installation area is provided with limit protrusions at both ends of the movement path of the rotation limit portion. The rotation limit portion cooperates with the two limit protrusions to ensure that the knob can only rotate 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 includes a fixed cylinder arranged on a mounting frame; a cylindrical cylinder cavity is provided in the fixed cylinder, and a first air port connected to the charging and discharging air port, a second air port connected to the outlet end of the blowing flow channel of the blowing assembly, and a third air port connected to the inner cavity of the pump casing 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 direction of air flow.

6. The knob-type air pump for inflation and deflation according to claim 5, characterized in that: The top end of the rotary 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 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.

7. The 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 provided on the top side of the rotation 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 further provided with a mesh cover on the outer side of the air charging and discharging port.

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