Handle assembly of a hand pump, connection structure of a hand pump and hand pump

Abstract

The application discloses a handle assembly of a handheld pump, a connecting structure of the handheld pump and the handheld pump. The handle assembly comprises an intermediate shell and a handle. A connecting seat is arranged on the intermediate shell. The connecting seat is connected with the handle through a quick-release mechanism. A battery assembly is arranged in the handle. The connecting structure comprises a pump body and a connecting piece. The intermediate shell is in conductive connection with the pump body. The connecting piece is provided with a first connecting part and a second connecting part at two ends. The first connecting part is in sealed connection with the intermediate shell. The second connecting part is in sealed connection with the first shell. The handheld pump comprises the above structure. The pump body and the handle are connected through the intermediate shell. When the battery assembly is out of power, the user can replace the handle to make the handheld pump work immediately. The quick-release mechanism can improve the mounting and dismounting speed of the handle and the connecting seat. The connecting piece can connect the intermediate shell with the first shell. When the handheld pump is faulty, the damaged part can be dismounted and repaired separately.

Description

Technical Field

[0001] This application relates to the field of fluid transfer technology, and in particular to a handle assembly for a handheld pump, a connection structure for the handheld pump, and the handheld pump itself. Background Technology

[0002] With advancements in technology, water pumps are commonly used to transport fluids. However, traditional water pumps are bulky and lack portability, making them unsuitable for flexible application scenarios. Handheld pumps, on the other hand, are compact, portable, and not limited by a fixed power source, making them widely used in daily life, outdoor work, industrial maintenance, and emergency rescue. Currently, most handheld pumps require an external power cord. While handheld pumps allow for free movement within a limited area, issues such as tangled wiring arise. Furthermore, using a rechargeable power source compromises the pump's endurance.

[0003] In existing technologies, most handheld pumps have a single, integrated pump body. This makes it difficult to address internal malfunctions promptly. Furthermore, users cannot replace the pump body themselves when its specifications do not meet their needs. Modifying the pump body to a detachable connection would facilitate replacement and maintenance. However, currently, most pump bodies use threaded connections, and frequent replacements can lead to wear on the seals and potential misalignment of the installation angle, thus reducing the pump's sealing performance. Therefore, it is necessary to improve the existing handheld pump connection structure. Summary of the Invention

[0004] The first objective of this application is to provide a handle assembly for a hand pump that can solve at least one of the defects in the aforementioned background art.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a hand pump handle assembly, comprising an intermediate housing and a handle, wherein a connecting seat is mounted on the intermediate housing, and the connecting seat is connected to the handle via a quick-release mechanism; further comprising a battery assembly located within the handle, wherein the handle includes a second housing, and the battery assembly is installed within the second housing; a motor wire assembly is provided on the connecting seat; further comprising a control board, wherein the control board is located within the second housing or within the connecting seat, and a first pin is provided on the control board or the second housing; a second pin is provided on the connecting seat, and the second pin conducts electricity in conjunction with the first pin.

[0006] The above design further enhances the continuous working capability of the handheld pump. When the battery is depleted, the user can detach the handle and connect the charging cable for charging. Alternatively, the user can replace the handle to enable the handheld pump to operate immediately. The quick-release mechanism further improves the speed of installing and removing the handle from the connector. Power from the battery can be transferred to the motor cable assembly via the interaction of the first and second pins. After the handle is installed, the second pin extends into the corresponding pin hole and connects with the first pin.

[0007] Preferably, the handle is provided with a switch connected to the control board, and the second housing is provided with a charging port, which is electrically connected to the battery assembly. This configuration allows the hand pump to be controlled by a switch on the handle, making it more convenient for the user to operate and improving its ease of use. When the battery is depleted, the user can remove the handle and connect a charging cable for charging.

[0008] Preferably, the handle is provided with a handle cover, and the switch is disposed on the handle cover. With this configuration, the user can still operate the switch with the same hand while holding the handle with one hand.

[0009] Preferably, the quick-release mechanism includes a quick-release housing and a quick-release ring. A slide rail is provided inside the quick-release housing, and the quick-release ring is elastically mounted on the slide rail. A limiting groove is provided on the second housing and / or the connecting seat. A limiting block is provided on the inner side of the quick-release ring, and the limiting block engages with the limiting groove through the elastic deformation of the quick-release ring. With this configuration, when the second housing engages with the quick-release ring, the limiting block extends into the limiting groove and limits the second housing, thereby preventing the second housing from detaching from the connecting seat. When the user needs to remove the handle, external force can be used to drive the quick-release ring to deform, causing the limiting block to disengage from the limiting groove, thereby removing the handle.

[0010] Preferably, the quick-release housing is fixedly installed on the connecting seat. The second housing has an elliptical cross-section and is sleeved with the quick-release ring, with a gap between the second housing and the quick-release ring. A stop block is provided in the slide rail, and a protrusion that cooperates with the stop block is provided on the quick-release ring. With this configuration, the protrusion can be blocked by the stop block, causing the quick-release ring to bend and deform to both sides, thereby driving the limiting block to disengage from the limiting groove.

[0011] Preferably, a button is provided on the side of the quick-release ring away from the protrusion, and a through hole is provided on the quick-release housing to mate with the button. This design makes it more convenient for the user to operate the quick-release ring. When removing the handle, the user only needs to press the button to deform the quick-release ring, causing the limiting block to disengage from the limiting groove and releasing the limiting effect on the second housing. When installing the second housing, the user first presses the button to leave space in the quick-release ring for installing the second housing. When the second housing reaches the designated installation point, releasing the button will allow the quick-release ring to return to its original shape, causing the limiting block to extend into the limiting groove and lock the second housing.

[0012] The second objective of this application is to provide a connection structure for a handheld pump that can solve at least one of the defects in the aforementioned background art.

[0013] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a connection structure for a handheld pump, comprising a pump body and an intermediate housing, the intermediate housing being electrically connected to the pump body; the pump body comprising a first housing, a motor housing being installed inside the first housing, a flow channel being provided between the first housing and the motor housing, the flow channel being electrically connected to the intermediate housing; a motor assembly being sealed and installed inside the motor housing, the shaft of the motor assembly extending out of the motor housing, an impeller being installed on the shaft of the motor assembly; a suction port communicating with the outside being provided on the first housing; the first housing and the intermediate housing being connected by a connector, the two ends of the connector being respectively provided with a first connecting part and a second connecting part, the first connecting part being sealed and connected to the intermediate housing, the second connecting part being sealed and connected to the first housing, a filter assembly and a cover being provided inside the first housing, the second connecting part being connected to the first housing and then pressing and limiting the motor housing, and ensuring that the motor housing, cover and filter assembly are tightly fitted in sequence to eliminate assembly gaps between the parts.

[0014] With the above configuration, the motor assembly drives the impeller to rotate at high speed and generates negative pressure at the suction port, drawing external fluid into the pump body. The motor housing acts as a protective barrier to prevent fluid from entering the motor assembly. Water inside the pump body enters the intermediate housing through the flow channel, thereby achieving the purpose of fluid transfer. The connector connects the intermediate housing to the first housing. When the hand pump malfunctions, the damaged parts can be disassembled and repaired separately. When the connector is fixedly connected to the first housing, the part of the connector extending into the first housing can limit the motor housing, cover, and filter assembly by tightening and limiting, thereby eliminating assembly gaps between parts, ensuring a compact structure and reliable sealing, and significantly improving the stability and lifespan of the pump body.

[0015] Preferably, a skeleton sealing structure is provided between the shaft of the motor assembly and the impeller. The cover is located below the impeller and has a through hole communicating with the suction port. The filter assembly is located between the cover and the suction port. This configuration further improves the sealing performance of the motor assembly, preventing fluid from entering the motor assembly through the shaft. The cover guides the nearby fluid, working in conjunction with the impeller to direct the fluid near the suction port along the cover into the flow channel. The filter assembly prevents external impurities from entering the handheld pump, improving the stability and safety of the handheld pump's operation.

[0016] Preferably, the first connecting part is provided with a first connecting hole, and a first fastener is installed in the first connecting hole. The first fastener passes through the first connecting hole and is fixedly connected to the intermediate housing. The first housing is provided with a second connecting hole, and the second connecting part is provided with a countersunk hole. A connecting post is installed in the second connecting hole, and the connecting post is partially located in the countersunk hole. With this configuration, when the intermediate housing is connected to the first connecting part, the first fastener can be inserted into the connecting hole and fixedly installed on the intermediate housing, thereby improving the installation stability of the intermediate housing and the first connecting part. When installing the first housing, the user can first align the second connecting hole with the countersunk hole, and then let the connecting post pass through the second connecting hole and the countersunk hole in sequence to limit and seal the first housing.

[0017] Preferably, the connecting post has a central hole, and the connector has a third connecting hole. A second fastener is installed in the third connecting hole, with a portion of the second fastener located within the central hole. With this configuration, when installing the first housing, the user can first align the second connecting hole with the countersunk hole, then pass the connecting post through the second connecting hole and the countersunk hole in sequence, aligning the third connecting hole with the central hole. The second fastener then passes through the third connecting hole and the central hole in sequence to fix the position of the connecting post, thereby improving the connection stability between the first housing and the connector.

[0018] A third objective of this application is to provide a handheld pump that can solve at least one of the defects in the aforementioned background art.

[0019] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a handheld pump, including the above-mentioned handheld pump handle assembly and the above-mentioned handheld pump connection structure, further including a handle, a pump body and an intermediate housing, the pump body and the handle being connected through the intermediate housing; the motor wire assembly includes a wire, a first mounting member communicating with the intermediate housing is provided in the connector, one end of the wire is connected to a second pin, and the other end passes through the first mounting member and is connected to the motor assembly, a sealing structure is provided between the first mounting member and the wire.

[0020] With the above setup, when the handheld pump is started, the battery assembly supplies power to the motor assembly. The electricity in the battery assembly is transmitted to the motor assembly through the motor wire assembly, drawing external fluid into the pump body. The first mounting component can seal and limit the wires to prevent fluid from entering the second pin and causing a short circuit.

[0021] Preferably, a sealing cover is installed on the motor housing, and a second mounting member is provided on the sealing cover. The wire passes through the second mounting member and connects to the motor assembly. This configuration allows the motor housing to be sealed by the sealing cover, while the second mounting member serves to limit the movement of the wire.

[0022] Preferably, the handle is provided with a handle cover, and the handle cover is provided with a switch connected to the control panel. This configuration allows the hand pump to be turned on and off via the switch, and the switch's location on the handle makes it more convenient for the user to control the hand pump, improving its operational ease.

[0023] Compared with the prior art, the beneficial effects of this application are as follows: The battery pack is located inside the second housing. The detachable connection between the handle and the connector further enhances the continuous working capability of the handheld pump. When the battery is depleted, the user can immediately start working by replacing the handle. The quick-release mechanism further improves the speed of installing and removing the handle from the connector. When the second housing engages with the quick-release ring, the limiting block extends into the limiting groove and limits the second housing, thus preventing it from detaching from the connector. When the user needs to remove the handle, external force can be used to drive the quick-release ring to disengage the limiting block from the limiting groove, thereby removing the handle.

[0024] The connector connects the intermediate housing to the first housing, allowing for individual disassembly and repair of damaged components in case of pump malfunction. The first fastener secures the intermediate housing. When installing the first housing, the user aligns the second connecting hole with the countersunk hole, then passes the connecting post through the second connecting hole and the countersunk hole in sequence to achieve a limiting seal on the first housing. This invention offers advantages such as convenient installation, good sealing, and stable connection. Attached Figure Description

[0025] Figure 1 This is a schematic cross-sectional view of the handheld pump in this application.

[0026] Figure 2 This is a schematic diagram of the overall structure of the handheld pump in this application.

[0027] Figure 3 This is a schematic cross-sectional view of the handle assembly in this application. Figure 1 .

[0028] Figure 4 for Figure 3A magnified structural diagram of part A in the middle.

[0029] Figure 5 This is a schematic cross-sectional view of the handle assembly in this application. Figure 2 .

[0030] Figure 6 This is a schematic cross-sectional view of the handle assembly in this application. Figure 3 .

[0031] Figure 7 This is a schematic diagram of the battery assembly in this application.

[0032] Figure 8 This is a schematic diagram of the connector structure in this application.

[0033] Figure 9 This is a schematic diagram of the pump body in this application.

[0034] Figure 10 This is a schematic diagram of the connector in this application.

[0035] Figure 11 This is a cross-sectional structural diagram of the pump body in this application.

[0036] In the diagram: 1. First housing; 11. Flow channel; 12. Filter assembly; 13. Second connection hole; 100. Intermediate housing; 2. Second housing; 21. Battery assembly; 22. Limiting groove; 23. Pin hole; 24. Charging port; 25. Switch; 200. First fastener; 210. Control board; 211. First pin; 3. Motor housing; 31. Motor assembly; 32. Impeller; 33. Cover; 300. Second fastener; 4. Quick release mechanism; 41. Quick release... 42. Quick-release ring; 400. Connecting post; 401. Center hole; 410. Slide rail; 411. Stop block; 420. Limiting block; 421. Protrusion; 422. Button; 5. Connecting seat; 51. Motor cable assembly; 500. Hook; 510. Second pin; 6. Connector; 61. First connecting part; 62. Second connecting part; 63. Third connecting hole; 610. First connecting hole; 620. Countersunk hole; 7. Sealing cap; 71. Airtight screw. Detailed Implementation

[0037] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0038] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0039] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0040] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0041] The first aspect of this application provides a handle assembly for a handheld pump, one preferred embodiment of which is, for example... Figure 1 , Figure 2 and Figure 3 As shown, the pump includes a middle housing 100 and a handle. A connecting seat 5 is mounted on the middle housing 100, and the connecting seat 5 is connected to the handle via a quick-release mechanism 4. It also includes a battery assembly 21 located inside the handle. The handle includes a second housing 2, and the connecting seat 5 is equipped with a motor cable assembly 51 that is electrically connected to the battery assembly 21. When the battery assembly 21 is depleted, the user can replace the handle to enable the hand pump to start working immediately, thereby improving the continuous working capability of the hand pump. The quick-release mechanism 4 further improves the speed of installation and removal of the second housing 2 and the connecting seat 5.

[0042] Furthermore, such as Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, it also includes a control board 210, which is used to control the on / off state of the battery assembly 21 circuit. The control board 210 is located inside the second housing 2 or inside the connector 5. The control board 210 or the second housing 2 is provided with a first pin 211. The second housing 2 is provided with a charging port 24. The connector 5 is provided with a second pin 510. The second pin 510 conducts electricity with the first pin 211, and the charging port 24 is electrically connected to the battery assembly 21. The user only needs to insert the second housing 2 into the connector 5 to connect the circuit of the first pin 211 and the second pin 510, thereby transmitting the electricity in the battery assembly 21 to the motor wire assembly 51. After the second housing 2 is installed, the second pin 510 extends into the corresponding pin hole 23 and connects with the first pin 211.

[0043] It should be noted that the engagement method of the first pin 211 and the second pin 510 includes, but is not limited to, plug-in engagement. Here is a specific engagement method for ease of understanding: the first pin 211 is clip-shaped and has a certain preload, while the second pin 510 is plate-shaped. When the second pin 510 extends into the first pin 211, the preload of the first pin 211 forces it to remain in contact with the second pin 510 at all times, thereby improving the stability of the circuit connection. Of course, those skilled in the art can also use other connection methods, as long as the connection between the first pin 211 and the second pin 510 is stable, it will meet the requirements of this application.

[0044] It is understandable that when the battery assembly 21 is depleted, the user can connect a charging cable through the charging port 24 to charge it, thereby improving the battery life of the handheld pump. Of course, in other embodiments, the charging port 24 may not be provided, and the first pin 211 may be directly connected to an external power plug to complete the charging of the battery assembly 21.

[0045] In this embodiment, as Figure 3 As shown, a switch 25 connected to the control board 210 is provided on the handle. The switch 25 is used to control the on / off state of the battery assembly 21 circuit. Furthermore, a handle cover is provided on the second housing 2, and the switch 25 is located on the handle cover, so that the user can still operate the switch 25 with the same hand when holding the handle with one hand. Of course, those skilled in the art can adjust the position of the switch 25 according to actual needs.

[0046] In this embodiment, as Figure 5 and Figure 6As shown, the quick-release mechanism 4 includes a quick-release housing 41 and a quick-release ring 42. A slide rail 410 is provided inside the quick-release housing 41, and the quick-release ring 42 is elastically mounted on the slide rail 410. A limiting groove 22 is provided on the second housing 2 and / or the connecting seat 5. A limiting block 420 is provided on the inner side of the quick-release ring 42. The limiting block 420 engages with the limiting groove 22 through the elastic deformation of the quick-release ring 42 to limit its movement. When the second housing 2 engages with the quick-release ring 42, the limiting block 420 extends into the limiting groove 22 and limits the movement of the second housing 2, thereby preventing the second housing 2 from detaching from the connecting seat 5. When the user needs to disassemble the second housing 2, external force can be used to deform the quick-release ring 42, causing the limiting block 420 to disengage from the limiting groove 22, thereby removing the second housing 2.

[0047] It is understood that the quick-release mechanism 4 can further accelerate the disassembly speed of the connecting seat 5 or the second housing 2. When the hand pump is out of power or blocked at the bottom, the corresponding connecting seat 5 or the second housing 2 can be disassembled for maintenance and repair as needed. The specific installation position of the quick-release mechanism 4 is not limited in this application; it can be fixedly connected to either the second housing 2 or the connecting seat 5, or it can be used as a separate accessory to connect the connecting seat 5 to the second housing 2. Those skilled in the art can choose the specific configuration according to actual needs. In addition, to complete the fluid transport, a discharge port is provided on the connecting seat 5. One end of the discharge port is connected to the intermediate housing 100, and the other end is connected to the outside.

[0048] Specifically, such as Figure 5 and Figure 6 The quick-release housing 41 is fixedly installed on the connecting seat 5. When the second housing 2 is engaged with the quick-release ring 42, the limiting block 420 extends into the limiting groove 22 and limits the second housing 2, thereby preventing the second housing 2 from detaching from the connecting seat 5. When the user needs to disassemble the second housing, the quick-release ring 42 can be deformed by external force to make the limiting block 420 detach from the limiting groove 22 and the second housing 2 can be taken out, thereby improving the installation and disassembly speed of the second housing 2.

[0049] Specifically, such as Figure 5 and Figure 6 As shown, the second housing 2 has an elliptical cross-section. The second housing 2 is fitted with the quick-release ring 42, and a gap is left between the second housing 2 and the quick-release ring 42 to allow the quick-release ring 42 a certain deformation space. A stop block 411 is provided in the slide rail 410, and a protrusion 421 that cooperates with the stop block 411 is provided on the quick-release ring 42. When the quick-release ring 42 is squeezed by an external force, the protrusion 421 cooperates with the stop block 411 to prevent the quick-release ring 42 from moving, thereby forcing the quick-release ring 42 to bend elastically outward, causing the limiting block 420 to disengage from the limiting groove 22, thereby releasing the lock on the second housing.

[0050] It should be noted that the number of limiting blocks 420 and limiting grooves 22 is not limited, and those skilled in the art can adjust it according to actual needs; the preferred embodiment of this application is that there are two limiting blocks 420 and two limiting grooves 22, and the two limiting blocks 420 are symmetrically arranged on both sides of the quick release ring 42.

[0051] Furthermore, such as Figure 5 As shown, a button 422 is provided on the side of the quick-release ring 42 away from the protrusion 421. A through hole is provided on the quick-release housing 41 to cooperate with the button 422. The button 422 is exposed to the outside through the through hole, which makes it more convenient for the user to operate the quick-release ring 42. To remove the second housing 2, the user only needs to press the button 422 to deform the quick-release ring 42, causing the limiting block 420 to disengage from the limiting groove 22 and releasing the limiting effect on the second housing 2. When installing the second housing 2, the user first presses the button 422 to leave space in the quick-release ring 42 for installing the second housing 2. When the second housing 2 reaches the designated installation point, releasing the button 422 will allow the quick-release ring 42 to return to its original shape, causing the limiting block 420 to extend into the limiting groove 22 and lock the second housing 2.

[0052] The second aspect of this application provides a connection structure for a handheld pump, one preferred embodiment of which is, for example... Figure 9 , Figure 10 and Figure 11 As shown, the pump includes a pump body and an intermediate housing 100, which are electrically connected to the pump body. The pump body includes a first housing 1, on the inner wall of which a motor housing 3 is installed. A flow channel 11 is provided between the inner wall of the first housing 1 and the outer wall of the motor housing 3, and the flow channel 11 is electrically connected to the intermediate housing 100. A motor assembly 31 is sealed and installed inside the motor housing 3. The shaft of the motor assembly 31 extends out of the motor housing 3, and an impeller 32 is installed on the shaft of the motor assembly 31. The first housing 1 has a suction port that is open to the outside. When the handheld pump is started, the motor assembly 31 drives the impeller 32 to rotate at high speed and generates negative pressure at the suction port, drawing external fluid into the pump body. The motor housing 3 acts as a protective barrier to prevent fluid from entering the motor assembly 31. Water in the pump body enters the intermediate housing 100 through the flow channel 11, thereby achieving the purpose of fluid transfer.

[0053] Specifically, such as Figure 11As shown, the first housing 1 and the intermediate housing 100 are connected by a connector 6. The connector 6 has a first connecting part 61 and a second connecting part 62 at its two ends. The first connecting part 61 is sealed to the intermediate housing 100, and the second connecting part 62 is sealed to the first housing 1. The first housing 1 also contains a filter assembly 12 and a cover 33. After the connector 6 is connected to the first housing 1, the second connecting part 62 can press and limit the motor housing 3, thereby ensuring a tight fit between the motor housing 3, the cover 33, and the filter assembly 12, eliminating assembly gaps and ensuring a compact and reliable overall structure, significantly improving the stability and lifespan of the handheld pump. When the handheld pump malfunctions, either the intermediate housing 100 or the first housing 1 can be disassembled and repaired separately.

[0054] In this embodiment, as Figure 11 As shown, a skeleton seal structure is provided between the shaft of the motor assembly 31 and the impeller 32 to improve the sealing performance of the motor assembly 31 and prevent fluid from entering the motor assembly 31 through the shaft. The cover 33 is located below the impeller and has a through hole communicating with the suction port. When the handheld pump is working, the cover 33 can guide the nearby fluid, and then the cover 33, in conjunction with the impeller 32, guides the fluid near the suction port along the cover into the flow channel 11, thereby completing the fluid transport. The skeleton seal structure is existing technology and will not be described in detail here.

[0055] Furthermore, such as Figure 11 As shown, the filter assembly 12 is located between the cover 33 and the suction port. The filter assembly 12 can block external impurities from entering the handheld pump, improving the stability and safety of the handheld pump operation. The filter assembly 12 and the first housing 1 can be connected separately or as a single unit. If it is connected separately, the filter assembly 12 can be replaced individually; if it is connected as a single unit, multiple filter holes only need to be drilled in the first housing 1.

[0056] Specifically, such as Figure 10 and Figure 11As shown, the first connecting part 61 is provided with at least one first connecting hole 610, and a first fastener 200 is installed in the first connecting hole 610. The first fastener 200 passes through the first connecting hole 610 and is fixedly connected to the intermediate housing 100. The first housing 1 is provided with at least one second connecting hole 13, and the second connecting part 62 is provided with a number of countersunk holes 620 equal to the number of second connecting holes 13. A connecting post 400 is installed in the second connecting hole 13, and part of the connecting post 400 is located in the countersunk hole 620. The intermediate housing 100 and the first housing 1 can be connected by the connecting piece 6. When the hand pump malfunctions, the damaged part can be disassembled and repaired separately. The first fastener 200 can fix the intermediate housing 100. When installing the first housing 1, the user can first align the second connecting hole 13 with the countersunk hole 620, and then let the connecting post 400 pass through the second connecting hole 13 and the countersunk hole 620 in sequence to limit and seal the first housing 1.

[0057] It should be noted that the sealing methods between the first housing 1 and the intermediate housing 100 and the connecting member 6 include, but are not limited to, installing sealing rings at both ends of the connecting member 6.

[0058] Furthermore, the connection post 400 and the second connection hole 13 can be coupled in the following two ways, including but not limited to the following two.

[0059] The first type: the connecting post 400 is provided with external threads, and the second connecting hole 13 and / or countersunk hole 620 is provided with internal threads. The connecting post 400 fixes the first housing 1 and the connecting piece 6 together through threaded engagement.

[0060] The second type, such as Figure 11 As shown, the connecting post 400 is provided with a central hole 401, and the connecting piece 6 is provided with a third connecting hole 63. A second fastener 300 is installed in the third connecting hole 63. The second fastener 300 is partially located in the central hole 401 and is provided with an external thread. The central hole 401 and / or the third connecting hole 63 are provided with an internal thread. When the connecting post 400 is installed, the connection stability between the first housing 1 and the connecting piece 6 can be further improved by the second fastener 300.

[0061] It is understood that those skilled in the art can choose between the two methods described above based on the actual situation. The first fastener 200 and the second fastener 300 include, but are not limited to, screws and bolts.

[0062] A third aspect of this application provides a handheld pump, one preferred embodiment of which is, for example... Figure 1 , Figure 2 , Figure 4 and Figure 11As shown, the device includes the handle assembly and / or the connection structure of the handheld pump described above; it also includes a handle, a pump body, and an intermediate housing 100, with the pump body and handle respectively mounted at both ends of the intermediate housing 100; the motor cable assembly 51 includes a wire, and a first mounting member connected to the intermediate housing 100 is provided in the connector 5. One end of the wire is connected to the second pin 510, and the other end passes through the first mounting member and is connected to the motor assembly 31. A sealing structure is provided between the first mounting member and the wire. When the handheld pump is started, the battery assembly 21 supplies power to the motor assembly 31. The electricity in the battery assembly 21 is transmitted to the motor assembly 31 through the motor cable assembly 51, drawing external fluid into the pump body. The first mounting member can seal and limit the wire, preventing fluid from entering the second pin 510 and causing a short circuit.

[0063] Furthermore, such as Figure 11 As shown, a sealing cover 7 is installed on the motor housing 3, and a second mounting component is provided on the sealing cover 7. The wire passes through the second mounting component and is connected to the motor assembly 31. A sealing structure is provided between the second mounting component and the wire.

[0064] It is understood that the first and second mounting components in this application are respectively provided with both ends of the wire, which not only limits the position of the wire but also prevents the fluid in the hand pump from affecting the motor assembly 31 or the battery assembly 21. The sealing fit between the first and second mounting components and the wire can be chosen by those skilled in the art. Here, a specific fit is provided for ease of understanding: the first and second mounting components are made of rubber, and both are interference-fitted with the wire to achieve a sealing effect.

[0065] Specifically, such as Figure 11 As shown, the sealing cover 7 is provided with a vent hole, and an airtight screw 71 is installed in the vent hole. The vent hole can balance the internal and external air pressure, detect internal pressure and odor, and help determine whether there are problems such as oil leakage, water ingress or abnormal temperature rise. The airtight screw 71 can seal the vent hole to prevent fluid from entering the motor housing 3 through the vent hole.

[0066] Furthermore, such as Figure 2 As shown, a hook 500 is installed on the middle housing 100. When the hand pump is not in use, it can be placed vertically through the hook 500 to reduce the footprint of the hand pump.

[0067] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A handle assembly for a handheld pump, comprising an intermediate housing (100) and a handle, characterized in that, A connecting seat (5) is installed on the intermediate housing (100), and the connecting seat (5) is connected to the handle through a quick-release mechanism (4); It also includes a battery assembly (21) located inside the handle, the handle including a second housing (2), the battery assembly (21) being installed inside the second housing (2); the connector (5) is provided with a motor wire assembly (51). It also includes a control board (210), which is located inside the second housing (2) or inside the connector (5). The control board (210) or the second housing (2) is provided with a first pin (211), and the connector (5) is provided with a second pin (510). The second pin (510) and the first pin (211) are connected to conduct electricity.

2. The handle assembly of the handheld pump as claimed in claim 1, characterized in that, The handle is provided with a switch (25) connected to the control board (210), and the second housing (2) is provided with a charging port (24), which is electrically connected to the battery assembly (21).

3. The handle assembly of the handheld pump as described in claim 2, characterized in that, The handle is provided with a handle cover, and the switch (25) is provided on the handle cover.

4. The handle assembly of the handheld pump as claimed in claim 1, characterized in that, The quick-release mechanism (4) includes a quick-release housing (41) and a quick-release ring (42). A slide (410) is provided inside the quick-release housing (41). The quick-release ring (42) is elastically installed in the slide (410). A limiting groove (22) is provided on the second housing (2) and / or the connecting seat (5). A limiting block (420) is provided on the inner side of the quick-release ring (42). The limiting block (420) cooperates with the limiting groove (22) through the elastic deformation of the quick-release ring (42).

5. The handle assembly of the handheld pump as described in claim 4, characterized in that, The quick-release housing (41) is fixedly installed on the connecting seat (5). The cross-section of the second housing (2) is elliptical. The second housing (2) is sleeved with the quick-release ring (42), and there is a gap between the second housing (2) and the quick-release ring (42). A stop block (411) is provided in the slide (410), and a protrusion (421) that cooperates with the stop block (411) is provided on the quick-release ring (42).

6. The handle assembly of the hand pump as claimed in claim 5, characterized in that, A button (422) is provided on the side of the quick-release ring (42) away from the protrusion (421), and a through hole is provided on the quick-release housing (41) to cooperate with the button (422).

7. A connection structure for a handheld pump, characterized in that, The system includes a pump body and an intermediate housing (100), the intermediate housing (100) being electrically connected to the pump body. The pump body includes a first housing (1), a motor housing (3) being installed inside the first housing (1), a flow channel (11) being provided between the first housing (1) and the motor housing (3), the flow channel (11) being electrically connected to the intermediate housing (100); a motor assembly (31) is sealed and installed inside the motor housing (3), the shaft of the motor assembly (31) extending out of the motor housing (3), an impeller (32) being installed on the shaft of the motor assembly (31), and a suction port communicating with the outside being provided on the first housing (1). The first housing (1) is connected to the intermediate housing (100) by a connector (6). The two ends of the connector (6) are respectively provided with a first connecting part (61) and a second connecting part (62). The first connecting part (61) is sealed to the intermediate housing (100), and the second connecting part (62) is sealed to the first housing (1). The first housing (1) is provided with a filter assembly (12) and a cover (33). After the second connecting part (62) is connected to the first housing (1), it presses and limits the motor housing (3), and makes the motor housing (3), the cover (33) and the filter assembly (21) fit tightly in sequence to eliminate the assembly gap of each part.

8. The connection structure of the handheld pump as described in claim 7, characterized in that, A skeleton sealing structure is provided between the shaft of the motor assembly (31) and the impeller (32). The cover (33) is located below the impeller (32). The cover (33) is provided with a perforation that communicates with the suction port. The filter assembly is located between the cover (33) and the suction port.

9. The connection structure of the handheld pump as described in claim 7, characterized in that, The first connecting part (61) is provided with a first connecting hole (610), and a first fastener (200) is installed in the first connecting hole (610). The first fastener (200) passes through the first connecting hole (610) and is fixedly connected to the intermediate housing (100). The first housing (1) is provided with a second connecting hole (13), and the second connecting part (62) is provided with a countersunk hole (620). A connecting post (400) is installed in the second connecting hole (13), and part of the connecting post (400) is located in the countersunk hole (620).

10. The connection structure of the handheld pump as described in claim 9, characterized in that, The connecting post (400) is provided with a central hole (401), and the connector (6) is provided with a third connecting hole (63). A second fastener (300) is installed in the third connecting hole (63), and part of the second fastener (300) is located in the central hole (401).

11. A handheld pump, characterized in that, The hand pump includes a handle assembly of any one of claims 1-6 and / or a connection structure of any one of claims 7-10, and further includes a handle, a pump body and an intermediate housing (100), wherein the pump body and the handle are connected through the intermediate housing (100); the motor wire assembly (51) includes a wire, and a first mounting member that is in communication with the intermediate housing (100) is provided in the connector (5), one end of the wire is connected to a second pin (510), and the other end passes through the first mounting member and is connected to the motor assembly (31), wherein a sealing structure is provided between the first mounting member and the wire.

12. The handheld pump as described in claim 11, characterized in that, A sealing cover (7) is installed on the motor housing (3), and a second mounting component is provided on the sealing cover (7). The wire passes through the second mounting component and is connected to the motor assembly (31).

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