Electric air pump

Abstract

The utility model discloses a kind of electric air pump, belong to electric tool technical field, including casing, the inflation module of being equipped with air port, the hose of one end detachably connected to air port, hose is equipped with the clamping groove on the outer peripheral surface towards air port one end, air port is equipped with clamping assembly, clamping assembly includes the limiting clamp piece that can be radially embedded in clamping groove, limiting clamp piece is embedded in clamping groove so that hose is subjected to axial location. The specific cooperation structure between improved hose and air port, so that hose can be installed in air port by the cooperation of clamping assembly, pipe head can be connected without rotating multiple turns, greatly shorten the time consumption when hose is connected to air port, improve the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to an electric air pump. Background Technology

[0002] An electric air pump is a tool that uses an electric motor to inflate tires of vehicles such as cars, motorcycles, and bicycles, as well as some inflatable items (such as inflatable mattresses, inflatable sofas, inflatable toys, and inflatable trampolines). The air used for inflation is output through a hose. Because the hose is long and located outside the pump housing, it is prone to cracking due to frequent bending and pressure. Therefore, some electric air pumps now feature a detachable hose connection to the main unit's inflation port via a threaded connection. This facilitates hose replacement and allows for separate storage of the pump and hose. However, to ensure the strength of the threaded connection, the thread typically requires multiple turns. Users need to twist the hose head several times to install or remove the hose, resulting in a time-consuming process that hinders quick replacement and negatively impacts the user experience. Utility Model Content

[0003] To address the shortcomings and deficiencies in the existing technology, this utility model provides an electric air pump that improves the specific mating structure between the hose and the air port. This allows the hose to be quickly installed into the air port through the engagement with the snap-fit ​​component, eliminating the need for multiple rotations of the hose head. This significantly reduces the time required to connect the hose to the air port and improves the user experience.

[0004] To achieve the above-mentioned technical objectives, the electric air pump provided by this utility model includes:

[0005] chassis;

[0006] An inflation module is located inside the housing, and the inflation module is equipped with an air inlet;

[0007] A flexible hose located outside the housing, with one end of the hose detachably connected to the air inlet;

[0008] The hose has a groove on its outer peripheral surface facing the air port, and a snap-fit ​​assembly is provided at the air port. The snap-fit ​​assembly includes a limiting clip that can be radially embedded in the groove. The limiting clip is embedded in the groove to axially limit the hose.

[0009] Preferably, the snap-fit ​​assembly further includes a connector for inserting the end of the hose and an elastic element acting on the limiting clip. The limiting clip is radially movable on the connector, and the elastic element directly or indirectly biases the limiting clip toward the center of the connector. When the end of the hose is inserted into the connector, the limiting clip biased by the elastic element can be embedded in the clip groove so that the hose is axially limited.

[0010] Preferably, the snap-fit ​​assembly further includes a lock head that is axially movable and sleeved on the outside of the connector. The lock head has a central hole including a small-diameter hole section and a large-diameter hole section. The hole wall of the small-diameter hole section abuts against the limiting clip to push the limiting clip against the center of the connector. The hole wall of the large-diameter hole section releases the limiting clip so that the limiting clip can move away from the center of the connector.

[0011] Preferably, the elastic element contacts the lock head and biases the lock head toward the direction in which the wall of the small-diameter hole section abuts against the limiting clip.

[0012] Preferably, the end of the hose leaves the connector in a disengagement direction opposite to the insertion direction, the small-diameter section and the large-diameter section are distributed sequentially in the disengagement direction, and the elastic element biases the locking head in the disengagement direction.

[0013] Preferably, the elastic element is a spring sleeved on the outside of the connecting pipe, with one end of the spring positioned and the other end abutting against the lock head; and / or, the central hole further includes a tapered section disposed between the small-diameter hole section and the large-diameter hole section.

[0014] Preferably, the snap-fit ​​assembly further includes a rotatable locking head fitted onto the outside of the connector. The locking head rotating in the forward direction pushes the limiting clip against the center of the connector so that the limiting clip is embedded in the slot. The locking head rotating in the reverse direction releases the limiting clip so that the limiting clip can move away from the center of the connector to exit the slot.

[0015] Preferably, the inner circumferential surface of the lock head is provided with a centrifugal adjustment surface that gradually moves away from the center of the connecting pipe from the proximal end to the distal end. The lock head rotating in the forward direction causes the limiting latch to move from the distal end to the proximal end relative to the centrifugal adjustment surface, and the lock head rotating in the reverse direction causes the limiting latch to move from the proximal end to the distal end relative to the limiting latch.

[0016] Preferably, the elastic element is a torsion spring with one end positioned and the other end in contact with the lock head, and the torsion spring biases the lock head in the forward rotation direction.

[0017] Preferably, the torsion spring is sleeved on the outside of the connecting pipe, the connecting pipe has a positioning surface corresponding to one end of the torsion spring, the lock head has a bearing surface corresponding to the torsion spring, one end of the torsion spring contacts the positioning surface to achieve positioning, and the other end of the torsion spring contacts the bearing surface to achieve contact with the lock head.

[0018] Preferably, the slot is provided with an axially movable stop. When the end of the hose is inserted into the connecting pipe from the outside to the inside by the bias pressure of the elastic element, the limiting stop is embedded in the slot and limited between the stop and the inner wall of the slot. The limiting stop and the inner wall of the slot cooperate to put the end of the hose in a limited state of being axially limited.

[0019] Preferably, the end of the hose has an intermediate state where it moves inward from the limiting state to the limiting member passing the stop and being located between the stop and the outer wall of the groove. The outer side of the limiting member is provided with a first pushing surface. The stop, which moves with the end of the hose from the limiting state to the intermediate state, abuts against the first pushing surface, causing the limiting member to pass the stop.

[0020] Preferably, the outer side of the stop is provided with a second push surface. As the stop moves outward from the middle state along with the end of the hose, the second push surface abuts against the limiting clip, causing the limiting clip to overcome the bias pressure of the elastic element and move away from the center of the hose.

[0021] Preferably, the end of the hose is provided with a tube head, and a groove is provided on the outer peripheral surface of the tube head; and / or, the groove is annular.

[0022] Preferably, the inflation module includes a high-pressure inflation component, which has a high-pressure inflation port and a snap-fit ​​component at the high-pressure inflation port. The hose includes a first hose adapted to the high-pressure inflation component, one end of which is detachably connected to the high-pressure inflation port by cooperating with the snap-fit ​​component. And / or, the inflation module includes a low-pressure inflation component, which has an air intake port and a low-pressure inflation port. A snap-fit ​​component is provided at the air intake port and / or the low-pressure inflation port. The hose includes a second hose adapted to the low-pressure inflation component, one end of which is detachably connected to the air intake port or the low-pressure inflation port by cooperating with the snap-fit ​​component.

[0023] By adopting the above technical solution, this utility model has the following advantages:

[0024] 1. The electric air pump provided by this utility model has a groove on the outer circumference of one end of the hose, and a snap-fit ​​assembly at the air port. The snap-fit ​​assembly includes a limiting clip that can be radially embedded in the groove. When the end of the hose is inserted into the air port, the limiting clip is embedded in the groove, axially limiting the hose. This allows the hose to be stably connected to the air port through the cooperation of the snap-fit ​​assembly. Because the limiting clip can move radially and embed in the groove, the end of the hose can be directly inserted into the air port to achieve the purpose of connection. The hose does not need to be rotated multiple times during installation to achieve the connection purpose, greatly shortening the time required to connect the hose to the air port and effectively reducing the difficulty of operation, thus improving the user experience.

[0025] 2. The snap-fit ​​assembly also includes a connector and an elastic element. When the end of the hose is inserted into the connector, the limiting snap-fit, which is biased by the elastic element, automatically embeds into the slot, thereby axially limiting the end of the hose. This greatly reduces the difficulty of operation for users. The limiting snap-fit ​​can be stably embedded in the slot under the bias of the elastic element, thereby ensuring the stability of the fit between the limiting snap-fit ​​and the slot. This ensures the connection stability of the hose when it is connected to the air port through the snap-fit ​​assembly, and prevents the hose from easily detaching from the air port due to being dragged.

[0026] 3. In the first embodiment of the snap-fit ​​assembly, the snap-fit ​​assembly also includes a locking head, which is axially movable and sleeved on the outside of the connecting pipe. The central hole of the locking head includes a small-diameter section and a large-diameter section. When the small-diameter section corresponds to the limiting clip, the hole wall of the small-diameter section abuts against the limiting clip and limits the center of the connecting pipe. The limiting clip, which is abutted against the center of the connecting pipe, can be inserted into the slot to lock the end of the hose, thereby axially limiting the end of the hose. When the large-diameter section corresponds to the limiting clip, the hole wall of the large-diameter section releases the limiting clip, and the limiting clip can move away from the center of the connecting pipe. The limiting clip, which is away from the center of the connecting pipe, can be withdrawn from the slot to unlock the end of the hose, thereby releasing the axial limitation on the end of the hose and allowing the hose to be smoothly detached from the connecting pipe. The axial movement of the locking head allows the limiting clip to be inserted into or removed from the slot, thereby achieving the locking or unlocking of the end of the hose, and thus enabling the rapid installation or removal of the hose.

[0027] 4. The elastic element contacts the locking head, biasing the locking head towards the direction where the wall of the small-diameter section abuts against the limiting clip. Since the wall of the small-diameter section can push the limiting clip against the center of the connecting pipe, the elastic element indirectly biases the limiting clip towards the center of the connecting pipe through the locking head. When the end of the hose is inserted into the connecting pipe, the limiting clip is stably embedded in the slot under the indirect biasing action of the elastic element. The indirect biasing action of the elastic element improves the stability of the fit between the limiting clip and the slot, thereby improving the stability of the hose connection to the air port through the engagement with the locking assembly.

[0028] 5. The small-diameter and large-diameter hole sections are preferably distributed sequentially along the direction in which the hose detaches from the connector. The elastic element biases the locking head in the detachment direction. By reasonably setting the orientation of the locking head and the biasing direction of the elastic element, the elastic element is positioned relative to the locking head in the insertion direction of the hose, so that the elastic element can be located inside the housing. The locking assembly only needs to allow the locking head to protrude from the housing. The user can apply force to the locking head to overcome the biasing of the elastic element and move axially, so that the locking head can unlock the end of the hose when detaching from the hose.

[0029] 6. The elastic element is preferably a spring. The spring is sleeved on the outside of the pipe. One end of the spring is positioned and the other end abuts against the lock head. The type and installation structure of the elastic element are reasonably set so that the elastic element can be kept stable while meeting the bias requirements. On the other hand, it is convenient to reasonably control the external dimensions of the snap-fit ​​assembly.

[0030] 7. In the second embodiment of the snap-fit ​​assembly, the snap-fit ​​assembly also includes a locking head, which is rotatably fitted onto the outside of the hose. When the locking head rotates forward, it pushes a limiting clip against the center of the hose. The limiting clip, pressed against the center of the hose, can engage in a slot, axially limiting the end of the hose, thus enabling quick hose installation. When the locking head rotates in the reverse direction, it releases the limiting clip, allowing it to move away from the center of the hose. This movement removes the limiting clip from the slot, releasing the axial limitation on the hose end and allowing the hose to detach from the hose, thus enabling quick hose removal. The circumferential rotation of the locking head enables the hose to be locked or unlocked, thereby achieving quick hose installation or removal.

[0031] 8. A centrifugal adjustment surface is provided on the inner circumference of the locking head, gradually moving away from the center of the hose from the proximal end to the distal end. When the locking head rotates clockwise, the limiting clip moves from the distal end to the proximal end relative to the centrifugal adjustment surface, and the centrifugal adjustment surface pushes the limiting clip against the center of the hose, allowing the limiting clip to be inserted into the slot, thus achieving quick installation of the hose. When the locking head rotates counterclockwise, the limiting clip moves from the proximal end to the distal end relative to the centrifugal adjustment surface, the centrifugal adjustment surface releases the limiting clip, and the limiting clip can move away from the center of the hose to exit the slot, thus achieving quick release of the hose.

[0032] 9. The elastic element is preferably a torsion spring with one end positioned and the other end in contact with the locking head. The torsion spring biases the locking head in the forward rotation direction, indirectly causing the limiting clip to abut against the center of the connecting pipe through the locking head. When the end of the hose needs to be inserted into the connecting pipe, the user first applies force to the locking head to make it rotate in the opposite direction against the bias of the torsion spring. When inserted into place, the user releases the locking head, and the torsion spring drives the locking head to rotate automatically in the forward direction. The forward-rotating locking head abuts the limiting clip against the center of the connecting pipe. The limiting clip, abutting against the center of the connecting pipe, automatically embeds into the slot, thereby axially limiting the end of the hose and completing the quick installation of the hose. Because the torsion spring biases the locking head in the forward rotation direction, the limiting clip embedded in the slot is always subjected to a pre-tightening force, which can improve the stability of the limiting clip and the slot, thereby improving the stability of the hose connection to the air port.

[0033] 10. Preferably, the torsion spring is sleeved on the outside of the connecting pipe. The connecting pipe has a positioning surface, and the lock head has a bearing surface. One end of the torsion spring contacts the positioning surface to achieve positioning, and the other end of the torsion spring contacts the bearing surface to achieve contact with the lock head. By reasonably setting the installation method and mating method of the torsion spring, while reasonably controlling the external dimensions of the snap-fit ​​component, the torsion spring can maintain structural stability, thereby enabling the torsion spring to stably bias the lock head in the forward rotation direction.

[0034] 11. In the third embodiment of the snap-fit ​​assembly, an axially movable stop is provided within the snap-fit ​​groove. When the end of the hose is inserted into the connecting pipe from the outside in, the limiting stop is embedded in the snap-fit ​​groove and confined between the stop and the inner wall of the snap-fit ​​groove. The engagement of the limiting stop and the inner wall of the snap-fit ​​groove ensures that the end of the hose is in a axially limited state. Since the hose is generally pulled outward when connected to the air port, the end of the hose is subjected to an outward force. The engagement of the limiting stop and the inner wall of the snap-fit ​​groove can axially limit the end of the hose outward. This outward axial limitation solves the problem of the hose moving outward and detaching from the connecting pipe due to being pulled outward, ensuring the stability of the air pipe when connected to the air port through the snap-fit ​​assembly.

[0035] 12. The end of the hose has an intermediate state. During the process of the hose end moving backward from the limited state to the intermediate state, the stop that moves backward with the end abuts against the first pushing surface on the outer side of the limiting clip. Under the action of abutment, the limiting clip overcomes the bias pressure of the elastic element, moves away from the center of the pipe, and exits the slot. After exiting the slot, the limiting clip passes the backward-moving stop and is located between the stop and the outer wall of the slot. The specific structure of the limiting clip is reasonably designed so that the hose end and the stop can move backward smoothly to the intermediate state.

[0036] 13. A second pushing surface is provided on the outer side of the stop. As the end of the hose moves the stop outward from the middle position, the second pushing surface abuts against the limiting clip, causing the limiting clip to overcome the bias pressure of the elastic element and move away from the center of the hose. This allows the limiting clip to exit from the slot as the end of the hose disengages from the hose, thus enabling the hose to detach smoothly. A well-designed stop structure ensures that the end of the hose can detach smoothly from the hose, facilitating hose disassembly.

[0037] 14. Preferably, a tube head is provided at the end of the hose, and the groove is preferably provided on the outer circumferential surface of the tube head. The tube head increases the hardness of the hose end, thereby ensuring the structural stability of the groove, and further improving the stability of the limiting clip embedded in the groove so that the hose end is axially limited. This allows the hose to be stably connected to the air port through the cooperation of the tube head and the clamping assembly.

[0038] The slot is preferably annular. By rationally designing the shape of the slot, the end of the hose does not need to be inserted into the locking component in a specific circumferential position to allow the limiting card to be embedded in the slot. This greatly reduces the difficulty of fitting the limiting card into the slot, thereby significantly reducing the user's operating difficulty and improving the user experience.

[0039] 15. The inflation module can be equipped with a high-pressure inflation component, which includes a high-pressure inflation port. The first hose is detachably connected to the high-pressure inflation port via a snap-fit ​​component. Alternatively, the inflation module can be equipped with a low-pressure inflation / suction component, which includes an air intake port and a low-pressure inflation port. The second hose is detachably connected to either the air intake port or the low-pressure inflation port via a snap-fit ​​component. A well-designed inflation module structure allows the hose to be connected to the appropriate air port as needed. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the electric high-pressure air pump in Example 1;

[0041] Figure 2 This is an axial sectional view of the pipe fitting in Example 1 when the pipe head is not inserted into the snap-fit ​​assembly;

[0042] Figure 3 This is an exploded view of the high-pressure gas filling assembly in Example 1;

[0043] Figure 4 This is a partial structural diagram of the high-pressure air-filling assembly in Example 1;

[0044] Figure 5 This is an axial sectional view of the compression structure in Embodiment 1;

[0045] Figure 6 This is an exploded view of the snap-fit ​​assembly in Embodiment 1;

[0046] Figure 7 This is an axial sectional view of the pipe fitting when the pipe head is inserted into the snap-fit ​​assembly in Embodiment 1;

[0047] Figure 8 This is an axial sectional view of the connecting pipe in Embodiment 2 when the pipe head is not inserted into the snap-fit ​​assembly;

[0048] Figure 9 This is an exploded view of the snap-fit ​​assembly in Embodiment 2;

[0049] Figure 10 This is a structural diagram of the lock head in Embodiment 2;

[0050] Figure 11a This is a schematic diagram showing the engagement of the lock head when it rotates to the near end and aligns with the limiting latch in Embodiment 2.

[0051] Figure 11b This is a schematic diagram showing the engagement of the lock head when it rotates to the far end and aligns with the limiting latch in Embodiment 2.

[0052] Figure 12 This is an axial sectional view of the pipe fitting when the pipe head is inserted into the snap-fit ​​assembly in Embodiment 2;

[0053] Figure 13This is an axial sectional view of the pipe fitting in Example 3 when the pipe head is not inserted into the snap-fit ​​assembly;

[0054] Figure 14a , Figure 14b , Figure 14c This is an exploded view of the steps involved in inserting the tube head into the snap-fit ​​assembly in Embodiment 3;

[0055] Figure 15a , Figure 15b , Figure 15c , Figure 15d , Figure 15e , Figure 15f , Figure 15g This is an exploded view of the steps involved in disengaging the pipe head from the snap-fit ​​assembly in Embodiment 3.

[0056] Figure 16 This is a schematic diagram of the electric low-pressure air pump in Example 4;

[0057] Figure 17 This is a schematic diagram of the structure of the second flexible tube in Example 4.

[0058] In the diagram, 10 is an electric air pump, 10A is an electric high-pressure air pump, and 10B is an electric low-pressure air pump.

[0059] 100 - Housing, 110 - Handle, 120 - Receiver, 130 - Trigger, 140 - Light-transmitting cover

[0060] 200-Inflation module, 201-Air inlet, 210-High-pressure inflation assembly, 211-First motor, 2111-First rotating shaft, 212-Linear conversion mechanism, 2121-Driving gear, 2122-Driven gear, 2123-Connecting rod, 2124-Support shaft, 2125-Large bearing, 2126-Small bearing, 2127-Pin, 213-Compression mechanism, 2131-Pump cylinder, 2132-Piston, 2132A-Air inlet, 2132B-Air inlet valve, 2 133-Intermediate seat, 2133A-Air outlet, 2133B-Air outlet valve, 2134-Pump cover, 2135-Pump chamber, 2136-Inflation chamber, 2137-High-pressure inflation port, 2138-Inflation connector, 2139-Diverter port, 214-Transmission box, 2141-Box body, 2142-Box cover, 215-Fan blade, 220-Low-pressure charging and suction assembly, 221-Intake port, 222-Low-pressure inflation port, 223-Second motor, 224-Impeller, 225-Air guide shroud

[0061] 300 - Hose, 310 - First hose, 320 - Second hose

[0062] 410 - Pipe head, 411 - Slot, 4111 - Inner groove wall, 4112 - Outer groove wall, 412 - Clearance cone surface, 420 - Sealing ring, 430 - Universal inflation nozzle, 440 - Stop, 441 - Second push surface

[0063] 500-Snap-fit ​​assembly, 510-Connecting pipe, 511-Snap-fit ​​hole, 512-Inner stepped surface, 513-Outer stepped surface, 514-Positioning surface, 515-First protruding edge, 520-Limiting clip, 521-Ball bearing, 522-Snap fastener, 5221-First push surface, 530-Elastic element, 531-Spring, 532-Torsion spring, 540-Lock head, 541-Center hole, 5411-Small diameter hole section, 5412-Large diameter hole section, 5413-Conical section, 542-Limiting edge, 543-Corner groove, 544-Centrifugal adjustment surface, 5441-Proximal end, 5442-Distal end, 545-Bearing surface, 546-Second protruding edge, 550-Radial clearance, W1, W2-Hole wall

[0064] 610 - Battery pack, 620 - Control board, 630 - Main switch, 640 - User interface, 641 - Display screen, 642 - Buttons, 650 - Operation panel, 660 - Barometric pressure sensor, 670 - Illumination.

[0065] 710 - Guide tube, 720 - Diverter connector, 730 - Detection socket. Detailed Implementation

[0066] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0067] This utility model provides an electric air pump 10, comprising:

[0068] Casing 100;

[0069] An inflation module 200 is provided inside the housing 100, and the inflation module 200 is provided with an air port 201;

[0070] A flexible hose 300 is provided outside the housing 100, and one end of the flexible hose 300 is detachably connected to the air port 201;

[0071] The hose 300 has a groove 411 on its outer peripheral surface facing the air port 201. The air port 201 is provided with a snap-fit ​​assembly 500. The snap-fit ​​assembly 500 includes a limiting clip 520 that can be radially embedded in the groove 411. The limiting clip 520 is embedded in the groove 411 to axially limit the hose 300.

[0072] Since the limiting clip 520 can move radially and be embedded in the slot 411, the end of the hose 300 can be inserted into the air port 201 to achieve the purpose of connecting to the air port 201. The hose 300 does not need to be rotated many times to achieve the purpose of connection during installation, which greatly shortens the time spent connecting the hose 300 to the air port 201 and can effectively reduce the difficulty of operation, which is conducive to improving the user experience.

[0073] The present invention will now be described in detail with reference to the accompanying drawings. The term "tool" will also be used in the following description to refer to the electric air pump 10. Of course, the specific structure of the electric air pump 10 is not limited to the style shown in the drawings; the electric air pump 10 can also be configured in other reasonable ways. In the following description, the direction toward the interior of the housing 100 is defined as "inner," and the direction toward the exterior of the housing 100 is defined as "outer."

[0074] Example 1

[0075] Combination Figures 1 to 7 This embodiment uses an electric high-pressure air pump 10A as an example for explanation. The electric high-pressure air pump 10A includes a housing 100, a high-pressure air inflation component 210 disposed inside the housing 100, and a first hose 310 disposed outside the housing 100. The high-pressure air inflation component 210 has a high-pressure air inlet 2137, and a snap-fit ​​component 500 is provided at the high-pressure air inlet 2137. One end of the first hose 310 is provided with a hollow tube head 410. The first hose 310 is detachably connected to the high-pressure air inlet 2137 of the high-pressure air inflation component 210 through the cooperation of the tube head 410 and the snap-fit ​​component 500.

[0076] Combination Figure 1 , Figure 3 , Figure 4 , Figure 5The high-pressure inflation assembly 210 includes a first motor 211, a linear conversion mechanism 212, and a compression mechanism 213. The linear conversion mechanism 212 is housed within a transmission housing 214. The transmission housing 214 includes a housing 2141 and a cover 2142 that cooperate to form an accommodating space. The first motor 211 has a first rotating shaft 2111, one end of which passes through the housing 2141 and extends into the transmission housing 214. The linear conversion mechanism 212 includes a driving gear 2121, a driven gear 2122, and a connecting rod 2123. The compression mechanism 213 includes a pump cylinder 2131, a piston 2132, an intermediate seat 2133, and a pump cover 2134. The driving gear 2121 is sleeved on the first rotating shaft 2111. The driven gear 2122 is rotatably mounted within the transmission housing 214 via a support shaft 2124 and a large bearing 2125, and the driven gear 2122 meshes with the driving gear 2121. The lower end of the connecting rod 2123 is eccentrically hinged to the driven gear 2122 via a small bearing 2126 and a pin 2127. Specifically, the pin 2127 is eccentrically fixed to the driven gear 2122, the small bearing 2126 is rotatably sleeved on the outside of the pin 2127, and the lower end of the connecting rod 2123 is sleeved on the outside of the small bearing 2126 through a hole. Pump cylinder 2131 is fixed to housing 2141, and its axial direction is basically along the length of connecting rod 2123. Intermediate seat 2133 is fixed to the side of pump cylinder 2131 facing away from housing 2141, and the two maintain a circumferential sealed fit. Pump cover 2134 is fixed to the side of intermediate seat 2133 facing away from pump cylinder 2131, and the two maintain a circumferential sealed fit. Piston 2132 is located inside pump cylinder 2131, and the two maintain a circumferential sealed fit. The upper end of connecting rod 2123 extends into pump cylinder 2131 and is connected to piston 2132. Piston 2132, intermediate seat 2133 and pump cylinder 2131 cooperate to form pump chamber 2135 with variable volume. Intermediate seat 2133 and pump cover 2134 cooperate to form air chamber 2136 with fixed volume. The piston 2132 is provided with an air inlet 2132A and an air inlet valve 2132B for opening and closing the air inlet 2132A. The intermediate seat 2133 is provided with an air outlet 2133A and an air outlet valve 2133B for opening and closing the air outlet 2133A. The high-pressure air inlet 2137 is located on the pump cover 2134 and communicates with the air filling chamber 2136. As a specific solution of this embodiment, the piston 2132 and the connecting rod 2123 can be integrally formed, or they can be separately formed and then fixed together by fasteners. The piston 2132 and the connecting rod 2123 can also be hinged.

[0077] When the first motor 211 is working, it drives the driving gear 2121 to rotate. The driving gear 2121 drives the driven gear 2122 to rotate. The rotating driven gear 2122 drives the piston 2132 to reciprocate axially within the pump cylinder 2131 via the connecting rod 2123. The rotational motion of the shaft is converted into the linear reciprocating motion of the piston 2132 through the linear conversion mechanism 212. As the first motor 211 drives the piston 2132 to move away from the intermediate seat 2133 within the pump cylinder 2131 via the linear conversion mechanism 212, the pump chamber 2135 gradually increases in size. The outlet valve plate 2133B closes the outlet port 2133A, temporarily isolating the pump chamber 2135 from the inflation chamber 2136. The air pressure in the pump chamber 2135 is lower than atmospheric pressure. Under the action of the air pressure difference, the inlet valve plate 2132B deforms and opens the inlet port 2132A, allowing external air to flow into the pump chamber 2135 through the inlet port 2132A. The first motor 211 drives the piston 2132 via the linear conversion mechanism 212. During the movement of the pump cylinder 2131 towards the intermediate seat 2133, the outlet valve plate 2133B initially closes the outlet port 2133A. As the piston 2132 moves towards the intermediate seat 2133, the pump chamber 2135 gradually decreases in size, and the air pressure inside the pump chamber 2135 gradually increases, potentially exceeding atmospheric pressure. Under the pressure difference, the inlet valve plate 2132B closes the inlet port 2132A. Pump chamber 2135 is isolated from the outside air. When the volume of pump chamber 2135 decreases to a certain extent, causing the air pressure inside pump chamber 2135 to reach a certain intensity, the outlet valve plate 2133B opens the outlet port 2133A under the action of the air pressure difference. The gas in pump chamber 2135 flows into inflation chamber 2136 through outlet port 2133A. The gas flowing into inflation chamber 2136 can be output to the outside through high-pressure inflation port 2137 and used to inflate objects such as tires and balls. Of course, the specific structure of high-pressure inflation assembly 210 is not limited to what is described above and shown in the figures. Other existing technologies that can output high-pressure gas for inflation can also be used.

[0078] Combination Figure 2 , Figure 7In this embodiment, a hollow tube head 410 is fixedly fitted at one end of the first flexible tube 310, and a universal air nozzle 430 (compatible with American and British air nozzles) is installed at the other end. The universal air nozzle 430 can be connected to components such as French air nozzles, ball needle nozzles, and blow nozzles. A groove 411 is provided on the outer circumferential surface of the tube head 410. Preferably, the groove 411 extends around the circumference of the tube head 410, that is, the groove 411 is preferably annular. In addition, an axially positioned sealing ring 420 is also fitted on the outer circumferential surface of the tube head 410. In a specific solution of this embodiment, the tube head 410 and the first flexible tube 310 can be separately formed and then the tube head 410 is fixedly fitted onto the end of the first flexible tube 310; the tube head 410 and the first flexible tube 310 can also be integrally formed. In this case, the tube head 410 is a plastic structure that does not undergo elastic deformation. In other embodiments of this invention, the slot 411 can also be non-circular, and can be a reasonable style such as an arc-shaped slot. The slot 411 and the limiting card 520 are distributed in a corresponding manner so that the limiting card 520 can be embedded so that the tube head 410 is axially limited.

[0079] Combination Figure 6 In this embodiment, the snap-fit ​​assembly 500 includes a hollow tube 510, a radially movable limiting clip 520 disposed on the tube 510, and an elastic member 530 that indirectly biases the limiting clip 520 toward the center of the tube 510. The tube 510 is for the insertion of the tube head 410. When the tube head 410 is inserted into the tube 510, the limiting clip 520, which is biased by the elastic member 530, can be embedded in the slot 411. The tube head 410 is axially limited by the cooperation between the limiting clip 520 and the slot 411, thereby connecting the first hose 310 to the high-pressure inflation port 2137. Specifically, the pump cover 2134 has a hollow inflation connector 2138 at the high-pressure inflation port 2137. One end of the inflation connector 2138 is inserted into the high-pressure inflation port 2137 and fixedly connected to the pump cover 2134, while the other end of the inflation connector 2138 is located outside the pump cover 2134. The inner end of the connecting pipe 510 is fixedly connected to the inflation connector 2138, and the pipe head 410 can be inserted into the connecting pipe 510 from the outside in. In the specific solution of this embodiment, the inflation connector 2138 can be fixedly installed at the high-pressure inflation port 2137 of the pump cover 2134 by means of threaded engagement or other methods, and the inner end of the connecting pipe 510 can also be fixedly connected to the inflation connector 2138 by means of threaded engagement or other methods. In an alternative embodiment, the inflation connector 2138 and the pump cover 2134 can be integrally formed, or the inflation connector 2138 can be omitted and the inner end of the connecting pipe 510 can be directly fixed and inserted into the high-pressure inflation port 2137 of the pump cover 2134 by means of thread engagement, or the inflation connector 2138 can be omitted and the connecting pipe 510 and the pump cover 2134 can be integrally formed.

[0080] In this embodiment, the snap-fit ​​assembly 500 further includes a locking head 540 that is axially movable and sleeved on the outer end of the connecting pipe 510. The locking head 540 is axially hollow and has a central hole 541, which includes a small-diameter section 5411 and a large-diameter section 5412. When the locking head 540 is in the axial position corresponding to the small-diameter section 5411 and the limiting clip 520, the hole wall W1 of the small-diameter section 5411 abuts against the limiting clip 520 and pushes the limiting clip 520 against the center of the connecting pipe 510. When the locking head 540 is in the axial position corresponding to the large-diameter section 5412 and the limiting clip 520, the hole wall W2 of the large-diameter section 5412 releases the limiting clip 520, and the released limiting clip 520 can move away from the center of the connecting pipe 510. Preferably, the elastic element 530 contacts the locking head 540 and biases the locking head 540 towards the direction where the wall W1 of the small-diameter hole section 5411 abuts against the limiting member 520. Specifically, in this embodiment, the limiting member 520 is a ball bearing 521, and the connecting tube 510 is provided with a locking hole 511 that mates with the ball bearing 521. The locking hole 511 is a conical hole with its small end facing the center of the connecting tube 510 and its large end facing away from the center of the connecting tube 510. The inner diameter D1 of the small end of the locking hole 511 is smaller than the diameter D2 of the ball bearing 521, so that a part of the ball bearing 521 can protrude from the inner circumferential surface of the connecting tube 510 through the locking hole 511 but will not fall out of the locking hole 511. Preferably, two balls bearing 521 are evenly spaced along the circumference of the connecting tube 510, and correspondingly, the locking holes 511 and the balls bearing 521 are distributed in a one-to-one correspondence. Small-diameter bore section 5411 and large-diameter bore section 5412 are distributed internally and externally. The small-diameter bore section 5411 of the locking head 540 is loosely fitted with the outer end of the connecting pipe 510. The locking head 540 is axially movable and sleeved on the outer end of the connecting pipe 510 through the fit between the small-diameter bore section 5411 and the connecting pipe 510. The elastic element 530 is preferably a spring 531. The spring 531 is sleeved on the outside of the connecting pipe 510, with one end positioned and the other end abutting against the locking head 540. When the spring 531 is in a compressed state, it biases the locking head 540 outward. Under normal conditions, the locking head 540, biased outward by the spring 531, remains in the axial position corresponding to the small-diameter bore section 5411 and the ball 521. In order to facilitate the user to move the locking head 540 so that the tube head 410 can be smoothly inserted into or removed from the connecting pipe 510, the outer end of the locking head 540 extends outward from the hole on the housing 100 and can be pressed by the user. To prevent the lock head 540 from detaching from the housing 100 under the outward bias of the spring 531, the inner end of the lock head 540 is provided with a radially outward protruding limiting edge 542. Under normal conditions, the lock head 540, biased outward by the spring 531, causes the limiting edge 542 to abut against the inner surface of the housing 100, thereby limiting the lock head 540 axially outward. In other embodiments of this invention, the ball bearings 521 can also be arranged in a reasonable number, such as three or four, at circumferential intervals along the connecting pipe 510, depending on factors such as their diameter D2 and the thickness of the connecting pipe 510. The number of ball bearings 521 is not subject to excessive restrictions here.In other embodiments of this invention, the limiting pin 520 may also be replaced by other components such as a tapered pin or a pin with a T-shaped axial cross-section, without imposing too many restrictions on the specific style or type of the limiting pin 520. In other embodiments of this invention, the central hole 541 on the lock head 540 may also be set with a constant diameter. In this case, a groove corresponding to the ball 521 is provided on the outer wall of the central hole 541, and the groove is used to provide a certain radial clearance for the ball 521 to move away from the center of the connecting tube 510 and exit the slot 411.

[0081] When inflation is required, the user first presses the locking head 540 inward to overcome the bias of the spring 531 and move it inward to the axial position corresponding to the ball 521 in the large-diameter section. Then, the tube head 410 is inserted into the connecting tube 510 from the outside in. When the tube head 410 is fully inserted, the ball 521 and the slot 411 are axially aligned. At this point, the locking head 540 is released, and the spring 531, having recovered its deformation, drives the locking head 540 outward. As the locking head 540 moves outward, the hole wall W1 of the small-diameter section 5411 pushes the ball 521 against the center of the connecting tube 510. The ball 521 at the center of the tube 510 moves from the locking hole 511 toward the center of the connecting tube 510 and partially embeds into the locking groove 411. The locking head 540, which directly bears the bias pressure of the spring 531, is normally in the axial position corresponding to the small diameter section 5411 and the ball 521. The ball 521 is stably embedded in the locking groove 411 under the action of the hole wall W1 of the small diameter section 5411. The cooperation between the ball 521 and the locking groove 411 provides stable bidirectional axial restraint to the tube head 410, thereby preventing the tube head 410 from being dislodged from the connecting tube 510 by force, and thus realizing the rapid installation of the first flexible tube 310. When the tube head 410 is inserted into the connecting tube 510, the sealing ring 420 abuts against the inner circumferential surface of the connecting tube 510, and the sealing ring 420 achieves a circumferential sealing fit between the tube head 410 and the connecting tube 510.

[0082] When the first hose 310 needs to be removed, the user first presses the locking head 540 inward to make the locking head 540 overcome the bias of the spring 531 and move inward to the axial position corresponding to the large diameter section 5412 and the ball 521. There is a certain radial gap 550 between the hole wall W2 of the large diameter section 5412 and the outer peripheral surface of the connector 510. This radial gap 550 provides a certain space for the ball 521 to move away from the center of the connector 510 and thus exit the slot 411. Then, the hose head 410 is pulled out from the inside to the outside. During the process of pulling out the hose head 410, the ball 521 moves away from the center of the connector 510 and exits the slot 411, thereby releasing the axial limit on the hose head 410, so that the hose head 410 can be smoothly separated from the connector 510, thereby realizing the quick disassembly of the first hose 310.

[0083] To facilitate user confirmation of whether the tube head 410 is fully inserted into the connecting pipe 510 from the outside in, the connecting pipe 510 has a narrower inner diameter and a wider outer diameter, with an inner stepped surface 512 formed on its inner circumferential surface. When the tube head 410 is inserted until its rear end face contacts the inner stepped surface 512, the ball bearing 521 axially aligns with the slot 411. At this point, the tube head 410 is fully inserted, and the ball bearing 521 can be embedded in the slot 411. In other embodiments of this invention, the inner stepped surface 512 can be omitted, and a rib can be provided on the outer circumferential surface of the tube head 410. When the tube head 410 is inserted until the rib contacts the outer end face of the connecting pipe 510, it indicates that the tube head 410 is fully inserted.

[0084] To prevent the ball bearing 521 from getting stuck between the small-diameter section 5411 and the large-diameter section 5412, in this embodiment, the center hole 541 on the lock head 540 is also provided with a tapered section 5413 located between the small-diameter section 5411 and the large-diameter section 5412. The inner diameter of the tapered section 5413 gradually increases from the small-diameter section 5411 to the large-diameter section 5412. The tapered section 5413 avoids the formation of a stepped surface on the inner surface of the lock head 540, so that when the lock head 540 moves outward under the bias of the spring 531, the ball bearing 521 can smoothly abut against the center of the connecting tube 510 through the hole wall W1 of the small-diameter section 5411.

[0085] To improve the stability of spring 531, in this embodiment, the outer diameter of the connecting pipe 510 is wider on the inside and narrower on the outside, and an outer stepped surface 513 is formed on its outer circumferential surface. The inner end of spring 531 abuts against the outer stepped surface 513 to achieve positioning. Additionally, the inner end of the lock head 540 is provided with a circular groove 543, and the outer end of spring 531 is fitted onto the outside of the inner end of the lock head 540 and abuts against the groove wall of the groove 543. Of course, the fitting structure between the inner end of spring 531 and connecting pipe 510 is not limited to what is described above and shown in the accompanying drawings; other reasonable fitting methods can also be used, and no further restrictions are placed here. The inner end of spring 531 can also abut against a rib on the inner wall of the housing 100 to achieve positioning. Furthermore, the fitting structure between spring 531 and lock head 540 is not limited to what is described above and shown in the accompanying drawings; other reasonable fitting methods can also be used, and no further restrictions are placed here.

[0086] In this embodiment, the first motor 211 and the compression mechanism 213 of the high-pressure inflation assembly 210 can be arranged vertically or in parallel; no specific limitation is made on their arrangement. The housing 100 can be a left-right split structure or a top-bottom distributed structure, depending on the shape of the tool; no specific limitation is made on the style of the housing 100. To facilitate user gripping of the tool, a handle 110 can be directly formed or installed on the housing 100.

[0087] The tool in this embodiment is preferably powered by a battery pack 610. Based on this, a receiving part 120 that cooperates with the battery pack 610 can be provided on the housing 100. The battery pack 610 is detachably mounted on the housing 100 through cooperation with the receiving part 120. Of course, the tool in this embodiment can also be powered by a power cord connected to the mains.

[0088] In this embodiment, the tool also includes a control board 620, which is located inside the housing 100. The battery pack 610 can supply power to the control board 620, the first motor 211, and other electrical components, and the first motor 211 is controlled by the control board 620. A main switch 630 is provided inside the handle 110, and an exposed trigger 130 is provided at the handle 110. The trigger 130 is operated by the user and used to trigger the main switch 630. To facilitate user operation, an exposed user interface 640 is also provided on the housing 100. An operation board 650 electrically connected and / or signal-connected to the control board 620 is provided on the inner side of the user interface 640. To facilitate user operation, a display screen 641 and several buttons 642 can be provided on the user interface 640. For example, the buttons 642 can be set as power on / off buttons, air pressure setting buttons, pause buttons, etc. The display screen 641 can be used to display information such as the target air pressure value set by the user, the detected air pressure value during the inflation process, and the remaining power of the battery pack 610. Users can turn the tool on or off using the power button, set the target inflation pressure using the pressure setting button, and pause inflation using the pause button. Of course, the specific style of the user interface 640 is not limited to what is described above and shown in the accompanying drawings; it can be set to other reasonable styles, or the settings for the user interface 640 can be disabled.

[0089] In the specific solution of this embodiment, a fan blade 215 is sleeved on the end of the first rotating shaft 2111 away from the drive gear 2121. The housing 100 is provided with a grid-shaped air inlet and air outlet. When the first motor 211 is working, it drives the fan blade 215 to rotate. The rotating fan blade 215 forms an airflow that flows into the tool from the air inlet and out of the tool from the air outlet. This airflow can dissipate heat from components such as the first motor 211, the compression mechanism 213, and the control board 620.

[0090] In order to enable the electric air pump 10 to automatically stop, the tool also includes an air pressure detection element 660 electrically connected to the control board 620. The compression mechanism 213 is provided with a diversion port 2139 communicating with the high-pressure air inlet 2137. The diversion port 2139 extends to the air pressure detection element 660 to divert part of the compressed air to the air pressure detection element 660. The air pressure detection element 660 feeds back the detected air pressure signal to the control board 620. Specifically, the diversion port 2139 is located on the pump cover 2134 of the compression mechanism 213. The diversion port 2139 is connected to the inflation chamber 2136. The diversion port 2139 extends to the air pressure detection element 660 through the guide tube 710. One end of the guide tube 710 is connected to the diversion port 2139 of the pump cover 2134 through the diversion connector 720. The other end of the guide tube 710 is connected to the detection seat 730. The detection seat 730 has a detection chamber. The air pressure detection element 660 is located on the detection seat 730 and extends into the detection chamber. Since the guide tube 710 is relatively short, the air pressure in the detection chamber is basically the same as the air pressure at the diversion port 2139. Furthermore, since the air pressure at the diversion port 2139 is basically the same as the air pressure at the high-pressure inflation port 2137, the air pressure in the detection chamber is basically the same as the air pressure at the high-pressure inflation port 2137. That is, the air pressure detection element 660 can provide feedback on the air pressure at the high-pressure inflation port 2137 to the control board 620. Of course, the specific structure used to detect inflation pressure is not limited to what is described above and shown in the attached figures. Other structures that meet the requirements for pressure detection can also be used, or the pressure detection structure can be omitted.

[0091] During use, after the tool is powered on, the user can set the target air pressure value P according to the object being inflated via buttons, and then pull trigger 130 to start the tool. The tool inflates the object. When the control board 620 determines that the inflated object has reached the target air pressure value P based on the air pressure signal fed back by the air pressure detection element 660, the control board 620 can command the motor to stop working. Because the first hose 310 is relatively long, the air pressure signal P fed back by the air pressure detection element 660 will be slightly greater than the actual air pressure inside the inflated object. To ensure the inflation effect, the control board 620 can preset an air pressure compensation value ΔP. When the air pressure signal P fed back by the air pressure detection element 660 minus the air pressure compensation value ΔP equals the target air pressure value P, that is, P - ΔP = P, the control board 620 determines that inflation is complete and commands the first motor 211 to stop working. After use, the user can turn off the tool using the power button. The tool will not start when the user pulls trigger 130 while the tool is off.

[0092] To improve the user experience, users can start the tool with a set target air pressure value P and then release trigger 130. The tool will automatically stop after inflation is complete. If no target air pressure value P is set, the user needs to keep trigger 130 pressed to keep the tool working. The tool will stop working when the user releases trigger 130.

[0093] To reasonably expand the tool's uses, in this embodiment, the housing 100 also includes an illumination element 670 electrically connected to the battery pack 610. The housing 100 has a light-transmitting cover 140 corresponding to the illumination element 670, and a button for turning the illumination element 670 on and off. The battery pack 610 supplies power to the illumination element 670, and the user can control its on / off state via the button. As a preferred embodiment, the user can turn the illumination element 670 on and off when the tool is not powered on. Specifically, to facilitate turning the illumination element 670 on and off in dark environments, the button is preferably set independently relative to the user interface 640; however, the button for turning the illumination element 670 on and off can also be integrated into the user interface 640. The illumination element 670 can also be configured in other ways, such as being hinged to the housing in a flip-up manner; alternatively, the illumination element 670 and related components can be omitted.

[0094] In an alternative embodiment, an intake check valve can be used instead of intake port 2132A and intake valve plate 2132B. The intake check valve is located on piston 2132. When piston 2132 moves downward, the intake check valve opens to allow external air to flow into pump chamber 2135. When piston 2132 moves upward, the intake check valve closes to isolate pump chamber 2135 from external air. Alternatively, an exhaust check valve can be used instead of exhaust port 2133A and exhaust valve plate 2133B. The exhaust check valve is located on intermediate seat 2133. When piston 2132 moves downward, the exhaust check valve closes to isolate filling chamber 2136 from pump chamber 2135. The exhaust check valve opens when the gas in pump chamber 2135 is compressed to a certain extent, allowing high-pressure gas in pump chamber 2135 to flow to filling chamber 2136. The inlet and outlet check valves can be ordinary spring-loaded 531 type check valves, or other valves that meet the one-way opening requirements.

[0095] Example 2

[0096] Combination Figure 8 , Figure 9 In this embodiment, the snap-fit ​​assembly 500 includes a hollow tube 510, a radially movable limiting clip 520 disposed on the tube 510, a circumferentially rotatable locking head 540 sleeved on the outside of the tube 510, and an elastic member 530 that indirectly biases the limiting clip 520 toward the center of the tube 510. The limiting clip 520 can be a ball bearing 521, a tapered pin, or a pin with an approximately T-shaped axial cross section, etc. This embodiment uses a ball bearing 521 as an example for explanation and illustration, but it does not mean that the limiting clip 520 can only use a ball bearing 521. The fit between the ball bearing 521 and the tube 510 can be referred to Embodiment 1, which will not be repeated here.

[0097] The lock head 540 is rotatably fitted onto the outer end of the connecting tube 510. The inner end of the lock head 540 is located inside the housing 100, and the outer end of the lock head 540 extends outward through a hole in the housing 100 to allow the user to rotate the lock head 540. To prevent the lock head 540 from detaching from the housing 100, the inner end of the lock head 540 is provided with a radially outward protruding limiting edge 542, which axially limits the lock head 540.

[0098] In this embodiment, when the locking head 540 rotates forward in the direction indicated by +ω, the locking head 540 pushes the limiting clip 520 against the center of the connector 510. When the tube head 410 is inserted into the connector 510, the limiting clip 520, which is pushed against the center of the connector 510, can be embedded in the slot 411, thereby axially limiting the tube head 410 and connecting the hose 300 to the air port 201. When the locking head 540 rotates backward in the direction indicated by -ω, the locking head 540 releases the limiting clip 520, allowing the limiting clip 520 to move away from the center of the connector 510. The limiting clip 520, which moves away from the center of the connector 510, can exit the slot 411, thereby releasing the axial limitation on the tube head 410 and allowing the tube head 410 to detach from the connector 510, thus achieving the detachment of the hose 300.

[0099] Combination Figure 11a , Figure 11bTo achieve this purpose, the inner circumferential surface of the lock head 540 is provided with a centrifugal adjustment surface 544, which is distributed in a one-to-one correspondence with the ball bearings 521. Specifically, the centrifugal adjustment surface 544 has a proximal end 5441 near the center of the connector 510 shown at point C and a distal end 5442 away from the center of the connector 510, and the centrifugal adjustment surface 544 gradually moves away from the center of the connector 510 from the proximal end 5441 to the distal end 5442. When the locking head 540 rotates in the positive direction indicated by +ω, the limiting clip 520 moves from the far end 5442 to the near end 5441 relative to the centrifugal adjustment surface 544. The centrifugal adjustment surface 544 gradually comes into contact with the limiting clip 520, causing the limiting clip 520 to be pressed against the center of the connecting pipe 510. When the tube head 410 is inserted into the connecting pipe 510, the limiting clip 520 pressed against the center of the connecting pipe 510 can be embedded in the slot 411. The limiting clip 520 embedded in the slot 411 causes the tube head 410 to be axially limited, thereby making the tube head 410 stably inserted into the connecting pipe 510, ensuring the stability of the hose 300 when connected to the air port 201. When the locking head 540 rotates in the opposite direction as indicated by -ω, the limiting clip 520 moves from the proximal end 5441 to the distal end 5442 relative to the centrifugal adjustment surface 544. The centrifugal adjustment surface 544 gradually loosens the limiting clip 520, and there is a radial gap between the distal end 5442 of the centrifugal adjustment surface 544 and the outer peripheral surface of the connector 510, allowing the limiting clip 520 to move away from the center of the connector 510. The limiting clip 520, which is loosened by the centrifugal adjustment surface 544, can move away from the center of the connector 510 and exit from the slot 411, thereby unlocking the tube head 410. The unlocked tube head 410 can be pulled out from the connector 510, thereby detaching the hose 300 from the air port 201.

[0100] Combination Figure 12In this embodiment, the elastic element 530 preferably biases the locking head 540 in the forward rotation direction, so that the locking head 540 is in a state where its proximal end 5441 is in contact with the limiting member 520 under normal conditions. The contact between the proximal end 5441 and the limiting member 520 ensures that the limiting member 520 can be stably embedded in the slot 411, guaranteeing the stability of the fit between the limiting member 520 and the slot 411, thereby improving the stability of the hose 300 connected to the air port 201. Preferably, the elastic element 530 is a torsion spring 532 with one end positioned and the other end in contact with the locking head 540, and the torsion spring 532 biases the locking head 540 in the forward rotation direction. Specifically, the torsion spring 532 is sleeved on the outside of the connecting pipe 510 and located between the outer stepped surface 513 of the connecting pipe 510 and the inner end face of the lock head 540. The connecting pipe 510 has a positioning surface 514 corresponding to one end of the torsion spring 532, and the lock head 540 has a bearing surface 545 corresponding to the torsion spring 532. One end of the torsion spring 532 contacts the positioning surface 514 for positioning, and the other end of the torsion spring 532 contacts the bearing surface 545 for contact with the lock head 540. Further, the connecting pipe 510 has a first protruding edge 515 protruding outward from the outer stepped surface 513, and the end face of one end of the first protruding edge 515 forms the positioning surface 514. Figure 10 The locking head 540 has a second protruding edge 546 protruding inward from its inner end face. One end face of the second protruding edge 546 forms a load-bearing surface 545. The first protruding edge 515 and the second protruding edge 546 are staggered in the circumferential direction. To facilitate the user's understanding of whether the locking head 540 has rotated sufficiently to allow the limiting clip 520 to be fully released by the centrifugal adjustment surface 544 and to be completely withdrawn from the slot 411, when the locking head 540 rotates to the point where the other end face of the first protruding edge 515 contacts the other end face of the second protruding edge 546, it indicates that the locking head 540 has rotated to the point where the far end 5442 of the centrifugal adjustment surface 544 corresponds to the limiting clip 520. At this time, the limiting clip 520 can move a sufficient distance away from the center of the connecting pipe 510 to completely withdraw from the slot 411, thereby avoiding obstruction to the insertion or disengagement of the pipe head 410 from the connecting pipe 510. In this embodiment, the maximum rotation angle of the locking head 540 is preferably less than 180°.

[0101] When inflation is required, the user first applies force to the locking head 540, causing it to rotate in the opposite direction against the bias of the torsion spring 532 until the distal end 5442 of the centrifugal adjustment surface 544 aligns with the limiting clip 520. Then, the tube head 410 is inserted into the connecting tube 510 from the outside in. When the inner end face of the tube head 410 abuts against the inner stepped surface 512, the tube head 410 is fully inserted and cannot be inserted further. At this point, the locking head 540 is released, and the torsion spring 532, having recovered its deformation, drives the locking head 540 to rotate automatically in the forward direction. The locking head 540 causes the limiting clip 520 to move from the far end 5442 to the near end 5441 relative to the centrifugal adjustment surface 544. The centrifugal adjustment surface 544 pushes the limiting clip 520 against the center of the connector 510. The limiting clip 520, which is pushed against the center of the connector 510, is embedded in the slot 411. The cooperation between the limiting clip 520 and the slot 411 makes the tube head 410 stably subject to bidirectional limiting from the inside and outside, thereby preventing the tube head 410 from being dislodged from the connector 510 by force, and thus realizing the rapid installation of the first hose 310.

[0102] When the first hose 310 needs to be removed, the user first applies force to the locking head 540 to make the locking head 540 overcome the bias pressure of the torsion spring 532 and rotate in the opposite direction until the far end 5442 of the centrifugal adjustment surface 544 corresponds to the limiting clip 520. Then, the hose head 410 is pulled out of the connecting pipe 510 from the inside to the outside. During the process of pulling out the connecting pipe 510, the limiting clip 520 moves away from the center of the connecting pipe 510 and exits the slot 411, thereby releasing the axial limitation on the hose head 410, so that the hose head 410 can be smoothly separated from the connecting pipe 510, thereby realizing the quick disassembly of the first hose 310.

[0103] The other structures of Embodiment 2 are the same as those of Embodiment 1, and will not be described in detail here.

[0104] Example 3

[0105] Combination Figure 13 In this embodiment, the snap-fit ​​assembly 500 includes a hollow tube 510, a radially movable limiting snap member 520 disposed on the tube 510, and an elastic member 530 that directly biases the limiting snap member 520 toward the center of the tube 510. The limiting snap member 520 can be a component such as a buckle 522. This embodiment uses a buckle 522 as an example for explanation and illustration, but it does not mean that the limiting snap member 520 can only be a buckle 522. In addition, the elastic member 530 in this embodiment is a spring 531. One end of the spring 531 is positioned and the other end abuts against the buckle 522. The spring 531 is in a compressed state and pushes the buckle 522 toward the center of the tube 510.

[0106] In this embodiment, the slot 411 is provided with an axially movable stop 440. When the tube head 410 is inserted into the connecting pipe 510 from the outside in, the buckle 522, which is biased by the elastic member 530, is embedded in the slot 411 and is limited between the stop 440 and the inner groove wall 4111 of the slot 411. The buckle 522 and the inner groove wall 4111 of the slot 411 cooperate to limit the tube head 410 outward. Since the hose 300 is generally dragged outward when connected to the air port 201, the tube head 410 is subjected to an outward force. The limiting buckle 520 and the inner groove wall 4111 of the slot 411 cooperate to limit the tube head 410 outward, which is sufficient to solve the problem that the tube head 410 is easily detached from the connecting pipe 510 due to being dragged outward, and ensure the stability of the hose 300 when connected to the air port 201 through the cooperation of the tube head 410 and the snap-fit ​​assembly 500. To ensure that the snap fastener 522 can be smoothly inserted between the stop 440 and the inner groove wall 4111 of the slot 411, the inner groove wall 4111 has a ring of relief cone surface 412 on the outer ring away from the center of the tube head 410, and the end of the snap fastener 522 facing the center of the tube head 510 is set as a pointed end. Figure 14a , Figure 14b , Figure 14c When the hose 300 needs to be connected to the air port 201, during the process of inserting the hose head 410 from the outside to the inside of the connecting pipe 510, the tip of the clip 522 inserts from the gap between the clearance cone surface 412 and the inner end face of the stop 440 into the space between the stop 440 and the inner wall 4111 of the groove 411. The stop 440, under force, moves outward relative to the hose head 410 within the groove 411. Figure 14c When the tube head 410 is inserted into place, the tip of the buckle 522 is embedded in the slot 411 and located between the inner side of the stop 440 and the inner wall 4111 of the slot 411, thereby limiting the tube head 410 outward. The tube head 410 is in a limited state, realizing the quick installation of the hose 300.

[0107] In order to facilitate the smooth disengagement of the tube head 410 from the connector 510, the tube head 410 has an intermediate state that is more inward than the limiting state. The outer side of the buckle 522 is provided with a cone-shaped first push surface 5221. The first push surface 5221 can also make the end of the buckle 522 facing the center of the connector 510 form a tip. During the process of the tube head 410 moving inward from the limiting state to the intermediate state, the stop 440 that follows the movement of the tube head 410 abuts against the first push surface 5221, causing the buckle 522 to pass over the stop 440. Furthermore, the outer side of the stop 440 is provided with a conical second pushing surface 441. During the outward movement of the tube head 410 from its central position under force, the second pushing surface 441 of the stop 440 abuts against the latch 522, causing the latch 522 to overcome the bias of the spring 531 and move away from the center of the connector 510. The latch 522, moving away from the center of the connector 510, exits the slot 411, thereby releasing the axial restriction of the tube head 410 by the latch 522, and allowing the tube head 410 to detach from the connector 510, thus enabling the disassembly of the hose 300. (Combined) Figures 15a to 15g When it is necessary to disconnect the hose 300 from the air port 201, first apply force to the hose head 410 to make the hose head 410 disconnect from the air port 201. Figure 14c The indicated limit state continues to move inward until... Figure 15d In the intermediate state shown, as the tube head 410 moves inward from the limited state to the intermediate state, the stop 440, which moves with the tube head 410, abuts against the first push surface 5221, causing the latch 522 to overcome the bias of the elastic member 530, move away from the center of the tube 510, and pass over the stop 440. Figure 15d When the tube head 410 moves to the intermediate state, the latch 522 is located between the outer side of the stop 440 and the outer groove wall 4112 of the slot 411. Then, force is applied to the tube head 410, causing the tube head 410 and the stop 440 to move outward together. During the outward movement of the stop 440, the second push surface 441 on the stop 440 abuts against the latch 522, causing the latch 522 to overcome the bias of the spring 531 and move away from the center of the connector 510. The latch 522, which is away from the center of the connector 510, exits the slot 411, thereby removing the obstruction caused by the latch 522 to the outwardly moving tube head 410 and the stop 440, so that the tube head 410 can be smoothly disengaged from the connector 510, realizing the quick disassembly of the hose 300.

[0108] The other structures in Embodiment 3 are the same as those in Embodiment 1, and will not be described in detail here.

[0109] Example 4

[0110] Combination Figure 16 , Figure 17In this embodiment, the tool is an electric low-pressure air pump 10B. The inflation module 200 includes a low-pressure inflation assembly 220, which has an air intake 221 and a low-pressure inflation port 222. A snap-fit ​​assembly 500 is provided at the air intake 221 and / or the low-pressure inflation port 222. The hose 300 includes a second hose 320 adapted to the low-pressure inflation assembly 220. One end of the second hose 320 is detachably connected to the air intake 221 or the low-pressure inflation port 222 through the cooperation of the hose head 410 and the snap-fit ​​assembly 500.

[0111] Specifically, the low-pressure charging and suction assembly 220 includes a second motor 223, an impeller 224 driven to rotate by the second motor 223, and a guide shroud 225 covering the outside of the impeller 224. The air intake 221 and the low-pressure charging port 222 are directly or indirectly provided on the guide shroud 225. When the second motor 223 drives the impeller 224 to rotate, an airflow is formed that flows in from the air intake 221 and flows out from the low-pressure charging port 222.

[0112] In this embodiment, a snap-fit ​​component 500 can be selectively provided at the air intake 221 and the low-pressure inflation port 222, or both can be provided simultaneously. When snap-fit ​​components 500 are provided at both the air intake 221 and the low-pressure inflation port 222, the two snap-fit ​​components 500 preferably adopt the same size specification so that the second hose 320 can be adapted to both the air intake 221 and the low-pressure inflation port 222. One end of the second hose 320 is provided with a tube head 410, and the other end is provided with an inflation head or connector or other components. The snap-fit ​​component 500 in this embodiment can adopt the structure described in Embodiment 1, Embodiment 2, or Embodiment 3, and the specific structure of the tube head 410 is determined according to the structure of the snap-fit ​​component 500.

[0113] In other embodiments of this invention, when both the air intake 221 and the low-pressure inflation port 222 are equipped with snap-fit ​​components, the snap-fit ​​components at the two locations can also adopt different sizes and specifications. In this case, the second hose 320 is equipped with two types of snap-fit ​​components, one of which is adapted to the air intake 221 and the other is adapted to the low-pressure inflation port 222.

[0114] In this embodiment, other structures of the electric low-pressure air pump 10B can refer to existing technologies such as electric blowers, and will not be described in detail here.

[0115] Example 5

[0116] In this embodiment, the inflation module of the electric air pump is equipped with both the high-pressure inflation component described in Embodiment 1 and the low-pressure inflation and suction component described in Embodiment 4. The snap-fit ​​component can be provided at only one of the three: the high-pressure inflation port, the suction port, and the low-pressure inflation port; or it can be provided at two of them; or it can be provided at all three. The specific structure of the snap-fit ​​component can refer to the structure described in Embodiment 1, Embodiment 2, or Embodiment 3, and will not be repeated here. The snap-fit ​​components at each location can adopt the same specific structure or different specific structures.

[0117] The hose includes a first hose corresponding to the high-pressure inflation component and a second hose corresponding to the low-pressure inflation component. One end of the first hose is detachably connected to the high-pressure inflation port of the high-pressure inflation component via a connector and a snap-fit ​​component. One end of the second hose is detachably connected to the air intake or low-pressure inflation port of the low-pressure inflation component via a connector and a snap-fit ​​component. The output air pressure of the high-pressure inflation port of the high-pressure inflation component is greater than the output air pressure of the low-pressure inflation port of the low-pressure inflation component. The outer diameter of the first hose is generally smaller than the outer diameter of the second hose. When the air intake and low-pressure inflation port of the low-pressure inflation component are equipped with snap-fit ​​components of different sizes, the second hose is equipped with two types: one snap-fit ​​component adapted to the air intake port and the other snap-fit ​​component adapted to the low-pressure inflation port.

[0118] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined in the claims of this utility model.

Claims

1. An electric air pump, including: chassis; An inflation module is located inside the housing, and the inflation module is equipped with an air inlet; A flexible hose located outside the casing, with one end detachably connected to the air inlet. The feature is that the hose has a groove on the outer peripheral surface facing the air port, and a snap-fit ​​assembly is provided at the air port. The snap-fit ​​assembly includes a limiting clip that can be radially embedded in the groove, and the limiting clip is embedded in the groove to axially limit the hose.

2. The electric air pump according to claim 1, characterized in that, The snap-fit ​​assembly also includes a connector for inserting the end of the hose and an elastic element acting on the limiting clip. The limiting clip is radially movable on the connector. The elastic element directly or indirectly biases the limiting clip toward the center of the connector. When the end of the hose is inserted into the connector, the limiting clip biased by the elastic element can be embedded in the slot so that the hose is axially limited.

3. The electric air pump according to claim 2, characterized in that, The snap-fit ​​assembly also includes a lock head that is axially movable and sleeved on the outside of the connector. The lock head has a central hole including a small-diameter section and a large-diameter section. The wall of the small-diameter section abuts against the limiting clip to push the limiting clip toward the center of the connector. The wall of the large-diameter section releases the limiting clip so that the limiting clip can move away from the center of the connector.

4. The electric air pump according to claim 3, characterized in that, The elastic element contacts the lock head and biases the lock head toward the direction in which the wall of the small-diameter hole section abuts against the limiting clip.

5. The electric air pump according to claim 4, characterized in that, The end of the hose leaves the connector in the disengagement direction opposite to the insertion direction. The small-diameter section and the large-diameter section are distributed sequentially in the disengagement direction, and the elastic element biases the locking head in the disengagement direction.

6. The electric air pump according to claim 4, characterized in that, The elastic element is a spring sleeved on the outside of the connecting pipe, with one end of the spring positioned and the other end abutting against the lock head; and / or, the central hole also includes a tapered section located between the small-diameter hole section and the large-diameter hole section.

7. The electric air pump according to claim 2, characterized in that, The snap-fit ​​assembly also includes a rotatable locking head fitted onto the outside of the connector. The locking head rotating in the forward direction pushes the limiting clip against the center of the connector so that the limiting clip is embedded in the slot. The locking head rotating in the reverse direction releases the limiting clip so that the limiting clip can move away from the center of the connector to exit the slot.

8. The electric air pump according to claim 7, characterized in that, The inner circumferential surface of the lock head is provided with a centrifugal adjustment surface that gradually moves away from the center of the connecting pipe from the proximal end to the distal end. The lock head rotating in the forward direction causes the limiting piece to move from the distal end to the proximal end relative to the centrifugal adjustment surface, and the lock head rotating in the reverse direction causes the limiting piece to move from the proximal end to the distal end relative to the limiting piece.

9. The electric air pump according to claim 7, characterized in that, The elastic element is a torsion spring with one end positioned and the other end in contact with the lock head. The torsion spring biases the lock head in the forward rotation direction.

10. The electric air pump according to claim 9, characterized in that, The torsion spring is sleeved on the outside of the connecting pipe. The connecting pipe has a positioning surface corresponding to one end of the torsion spring. The lock head has a bearing surface corresponding to the torsion spring. One end of the torsion spring contacts the positioning surface to achieve positioning, and the other end of the torsion spring contacts the bearing surface to achieve contact with the lock head.

11. The electric air pump according to claim 2, characterized in that, The slot is provided with an axially movable stop. When the end of the hose is inserted into the connecting pipe from the outside to the inside by the bias pressure of the elastic element, the limiting stop is embedded in the slot and limited between the stop and the inner wall of the slot. The limiting stop and the inner wall of the slot cooperate to put the end of the hose in a limited state of being axially limited.

12. The electric air pump according to claim 11, characterized in that, The end of the hose has an intermediate state from the limited state to the point where the limiting clip moves inward and passes the stop and is located between the stop and the outer wall of the slot. The outer side of the limiting clip is provided with a first pushing surface. The stop, which moves with the end of the hose from the limited state to the intermediate state, abuts against the first pushing surface, causing the limiting clip to pass the stop.

13. The electric air pump according to claim 12, characterized in that, The outer side of the stop is provided with a second push surface. As the stop moves outward from the middle state along with the end of the hose, the second push surface abuts against the limiting clip, causing the limiting clip to overcome the bias pressure of the elastic element and move away from the center of the hose.

14. The electric air pump according to claim 1, characterized in that, The end of the hose is provided with a tube head, and a groove is provided on the outer circumferential surface of the tube head; and / or, the groove is annular.

15. The electric air pump according to claim 1, characterized in that, The inflation module includes a high-pressure inflation component with a high-pressure inflation port and a snap-fit ​​component at the high-pressure inflation port. The hose includes a first hose adapted to the high-pressure inflation component, one end of which is detachably connected to the high-pressure inflation port by cooperating with the snap-fit ​​component. Alternatively, the inflation module includes a low-pressure inflation component with an air intake and a low-pressure inflation port, a snap-fit ​​component at the air intake and / or the low-pressure inflation port, and a second hose adapted to the low-pressure inflation component, one end of which is detachably connected to the air intake or the low-pressure inflation port by cooperating with the snap-fit ​​component.

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