A linear air pump

Abstract

The present invention belongs to the technical field of air pumps, and specifically relates to a linear air pump, including a housing, a mounting bracket and a motor, a PCB board, and also includes a fan blade assembly located in the housing; a mainboard fixed cover, a vent, a rotating cover, an air flow hole arranged in the panel of the rotating cover; a sliding cover and at least two convex teeth; a bottom cover; at least two push rods, each of which is sleeved with a reset spring; and further includes an external shell, an elastic bracket assembly, a lower vent arranged in the bottom plate of the external shell, and an air-blocking cover; the air-blocking cover can move longitudinally relative to the external shell; the bottom cover is located above the elastic bracket assembly and the two are connected or disconnected. Compared with existing similar products, the present invention adopts a linear air flow channel, which is small in size and has high efficiency in inflation or exhaust; the host is easy to disassemble and install, so it is easy to disassemble the host and charge it, which is convenient to use; and when the host is damaged, it can be disassembled for repair or replacement, which is conducive to saving after-sales costs.

Description

Technical Field

[0001] The invention relates to the technical field of air pumps, and in particular to a linear air pump used for inflating large-capacity inflatable products such as inflatable tents, air beds, air cushions, etc. Background Art

[0002] When inflating large-capacity inflatable products such as inflatable tents, air beds, and air cushions, a special air pump, that is, an air pump, is required. At present, the air inlet and outlet of such air pumps are arranged on the side of the outer shell, that is, the air pump adopts the side air inlet and outlet method. Therefore, the shaft that the motor drives the fan blades to rotate is 90 degrees to the air outlet. With this structure, the volume is large, and there are problems of air leakage and low inflation and exhaust efficiency; at the same time, the main unit of the air pump is fixedly connected to large-capacity inflatable products such as inflatable tents, air beds, and air cushions, and the air pump cannot be disassembled. Therefore, not only does it need to take the entire product to a charging power source or pull a long connecting line to charge the product when charging, but also, if each component of the product is damaged, it needs to be repaired or scrapped or replaced as a whole; the fan blades connected to the motor on the air pump generally adopt blower-type fan blades or ordinary fan-type fan blades, which are inefficient, resulting in low efficiency of the entire air pump. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide an air pump using a linear air duct.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a linear air pump comprises a shell, a mounting bracket and a motor arranged in the shell, a PCB board connected to the motor, and also comprises a fan blade assembly located in the shell and connected to one end of the motor; a mainboard fixing cover fixedly arranged at the upper end of the shell, a ventilation hole arranged in the mainboard fixing cover, a rotating cover arranged at the upper end of the shell and rotatable relative to the shell, the mainboard fixing cover is located in the rotating cover, and a plurality of air flow holes for connecting the inside of the rotating cover with the outside are arranged in the panel of the rotating cover; a sliding cover and at least two convex teeth fixedly arranged on the inner bottom surface of the rotating cover; a bottom cover arranged at the lower end of the shell; at least two top rods arranged in the shell along the longitudinal direction of the shell and movable along the longitudinal direction of the shell, each top rod having a A return spring is sleeved thereon; the upper end of the push rod extends out from a through hole arranged in the mainboard fixing cover, the lower end of the push rod is connected to the bottom cover, one end of the return spring contacts the supporting surface on the push rod, and the other end is connected to the bottom cover; it further includes an external shell detachably connected to the outer shell, an elastic bracket assembly arranged at the inner bottom of the external shell and in contact with the lower end of the push rod, a lower ventilation hole arranged in the bottom plate of the external shell, and an air-blocking cover arranged below the bottom of the external shell and connected to the elastic bracket assembly; the air-blocking cover can move longitudinally relative to the external shell for closing or opening the lower ventilation hole; the outer shell is arranged in the external shell, and the rotating cover is located at the opening end of the external shell; the bottom cover is located above the elastic bracket assembly.With the above structure, the air flow inlet and outlet during exhaust or inflation are respectively located at the two ends of the shell, and the motor shaft is arranged along the axial direction of the shell, so that a linear air flow channel is formed in the shell; the external shell is fixedly connected to large-capacity inflatable products such as inflatable tents, air beds, air cushions, etc. and is connected to the interior of such products; in the initial state, that is, when the air pump connected to large-capacity inflatable products such as inflatable tents, air beds, air cushions, etc. does not need to be inflated or exhausted, the motor is not started, the air-blocking cover is fitted with the bottom surface of the bottom plate of the external shell, and the lower ventilation hole is closed, and the large-capacity inflatable product is isolated from the outside; when inflation or exhaust is required, the rotating cover is rotated clockwise or counterclockwise. In this process, the sliding cover moves with the rotating cover, and the sliding cover moves to different positions of the ventilation hole, which are used to open the exhaust channel or the inflation channel respectively, that is, the function of the sliding cover is to switch the exhaust channel or the inflation channel , the motors are started at the same time, the convex teeth rotate to the corresponding push rods and squeeze the upper end of the push rods, so that the push rods move longitudinally along the outer shell, and the push rods squeeze the return spring when moving. At the same time, the lower end of the push rods passes through the bottom cover to squeeze the elastic bracket assembly, and the elastic bracket assembly moves longitudinally along the external shell, the air-sealing cover is separated from the bottom plate of the external shell, and the lower vent is opened. The interior of the shell is connected with the inflatable product and the outside world through the lower end of the shell, the lower vent and the air flow holes in the rotating cover, respectively, so that large-capacity inflatable products such as inflatable tents, air beds, and air cushions can be inflated or exhausted; after the inflation or exhaust is completed, the rotating cover is rotated, the convex teeth are separated from the upper end of the push rod, and the push rod returns to its original position under the action of the return spring, and the motor is turned off at this time, the elastic bracket assembly is reset to the initial position, the air-sealing cover closes the lower vent, and the interior of the shell is isolated from the inflatable product.

[0005] Furthermore, a first air duct and a second air duct are provided in the mounting bracket along its length direction, both ends of the first air duct and the second air duct are provided with openings, the upper ends of the first air duct and the lower ends are located in the ventilation holes, and the lower ends are fixedly connected to the lower end of the mounting bracket.

[0006] Preferably, the lower opening of the first air duct is located at the side wall of the lower end of the mounting bracket, and the lower opening of the second air duct is located in the end plate of the lower end of the mounting bracket.

[0007] In order to turn on the motor synchronously when the rotating cover is turned, two Hall switches are provided on the PCB board, and a magnet is provided on the inner bottom surface of the rotating cover. When the rotating cover is turned clockwise, the magnet contacts the Hall switch on the left side, and the motor can be turned on; conversely, when the rotating cover is turned counterclockwise, the magnet contacts the Hall switch on the right side, and the motor can also be turned on.

[0008] Furthermore, an inner opening is provided at the lower end of the shell, and the lower end of the mounting bracket is located in the inner opening; a mounting ring body is provided at the lower end of the mounting bracket, which is integrally formed with it and extends to the outside of the lower end of the shell, and the upper surface of the mounting ring body is combined with the lower end surface of the shell.

[0009] Preferably, the motor and fan blade assembly are arranged in a mounting bracket, and the fan blade assembly includes a circular shell fixedly connected to one end of the motor, a plate arranged in the circular shell and connected to the motor output shaft, a ring-shaped first blade group composed of multiple first blades arranged on the surface of the plate, and a ring-shaped second blade group composed of multiple second blades arranged on the inner wall of the circular shell; the circular shell is fixedly connected to the mounting bracket.

[0010] Furthermore, a first sealing ring is provided at the junction of the mounting ring body and the lower end surface of the shell; a second sealing ring is provided on the surface of the mainboard fixing cover, and the second sealing ring is located at the ventilation hole.

[0011] Furthermore, the PCB board is arranged on the surface of the mainboard fixed cover and is located in the rotating cover; a battery electrically connected to the PCB board is arranged in the mounting bracket; and a charging interface is arranged on the PCB board.

[0012] The bottom cover is not directly connected to the lower end of the outer shell. The bottom cover is arranged inside the lower end of the mounting bracket, which is equivalent to the bottom cover being arranged inside the lower end of the outer shell. A lower base plate is arranged at the lower end of the bottom cover; the lower base plate and the bottom cover are integrally formed and a step surface is formed at the junction of the two; a lower center hole is arranged in the bottom cover and passes through the lower base plate.

[0013] Furthermore, a third sealing ring is provided on the step surface.

[0014] Corresponding to the number of top rods, at least two longitudinal cylinders are provided on the mounting bracket, at least two longitudinal connecting cylinders are provided on the inner surface of the bottom cover, and at least two internal through holes are provided in the bottom cover which penetrate the lower bottom plate and are coaxial and connected with the longitudinal connecting cylinders respectively; the longitudinal connecting cylinders are respectively inserted into the lower end parts of the longitudinal cylinders, so the longitudinal cylinders, the longitudinal connecting cylinders and the internal through holes are coaxial.

[0015] Furthermore, the push rod is inserted into the longitudinal cylinder, the longitudinal connecting cylinder and the inner through hole and can move relative to the three; a fifth sealing ring is sleeved on the outside of the longitudinal connecting cylinder; the fifth sealing ring is located at the root of the longitudinal connecting cylinder connected to the inner surface of the bottom cover, and the lower end surface of the longitudinal cylinder is in contact with the fifth sealing ring.

[0016] Furthermore, the other end of the return spring is arranged in the free end of the longitudinal connecting tube.

[0017] Furthermore, a lower decorative sheet is provided on the bottom surface of the lower base plate, and at least two notches corresponding to the inner holes are provided at the edge of the lower decorative sheet so that the lower end of the top rod can pass through; a lower hole coaxial with the lower center hole is provided in the lower decorative sheet.

[0018] It also includes a face cover embedded in the rotating cover, the upper surface of the face cover is exposed from the central hole in the panel of the rotating cover, an upper decorative sheet is provided on the surface of the face cover, a charging hole for exposing the charging interface is provided in the face cover and the upper decorative sheet, and a soft rubber plug is provided at the charging hole that is detachably connected to the charging hole.

[0019] Furthermore, in order to achieve a detachable connection between the external shell and the outer shell, two buckle assemblies for connecting with the external shell are symmetrically provided on the outer wall of the outer shell.

[0020] Furthermore, it also includes a fourth sealing ring arranged in the surface of the air-locking cover combined with the bottom surface of the external shell.

[0021] Furthermore, the elastic bracket assembly includes a strip-shaped body, two connecting columns and an intermediate column arranged on the bottom surface of the strip-shaped body, and two upper ends are respectively sleeved on the lower return springs on the two connecting columns; the free end of the intermediate column extends downward along the lower ventilation hole and is fixedly connected to the air-blocking cover.

[0022] Two connecting bosses are provided on the bottom surface of the bottom plate of the external shell, each connecting boss is provided with a receiving hole connected to the inside of the external shell, the free ends of the two connecting bosses are respectively located in the two receiving holes, and the lower ends of the two lower return springs are respectively in contact with the bottom surfaces of the two receiving holes.

[0023] Furthermore, two side accommodating parts corresponding to the two buckle components are symmetrically provided on the two side walls of the external shell, an operating port is provided at the upper end of the side accommodating part, and a first latch tooth is provided on the inner wall of each side accommodating part; the side accommodating part is integrally formed with the external shell.

[0024] Furthermore, the snap-on assembly includes a snap-on shell fixedly connected to the outer wall of the shell, an inner mounting shell arranged in the snap-on shell and rotatably connected to the snap-on shell at one end, a pressing shell arranged at the other end of the inner mounting shell, a supporting tube arranged in the pressing shell, a side return spring located in the inner mounting shell and contacting the supporting tube at one end and contacting the outer wall of the shell at the other end, and a snap-on tooth arranged on the outer surface of the inner mounting shell.

[0025] The buckling panel of the buckling shell is respectively provided with two pressing holes and a buckling hole for pressing the shell and extending the buckling teeth; the buckling teeth are buckled with the first buckling teeth.

[0026] Furthermore, a hinged protrusion is provided on both side surfaces of one end of the inner mounting shell that is rotatably connected to the buckled outer shell, and two hinged notches respectively connected to the two hinged protrusions are provided at corresponding positions in the buckled outer shell.

[0027] Beneficial technical effects: With the above structure, the air flow inlet and outlet during exhaust or inflation are respectively located at both ends of the shell, and the motor shaft is arranged along the axial direction of the shell, thereby forming a linear air flow channel in the shell; the shell and the external shell are detachably connected, that is, the air pump host composed of the shell and other components is detachable and easy to install; compared with existing similar products, the present invention adopts a linear air flow channel, which is small in size and has high inflation or exhaust efficiency; the host and the external shell are detachable, that is, the host is easy to disassemble and install, so that it is convenient to disassemble the host for charging, which is convenient to use; and when the host is damaged, it can be disassembled for repair or replacement, which is beneficial to saving after-sales costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a first stereogram of an embodiment of the present invention;

[0029] Figure 2 is a second stereoscopic diagram of an embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0031] Figure 4 A partial cross-sectional view of an embodiment of the present invention;

[0032] Figure 5 This is a first exploded view of the air pump host according to an embodiment of the present invention;

[0033] Figure 6 A second exploded view of the air pump host according to an embodiment of the present invention;

[0034] Figure 7 A three-dimensional diagram of an air pump host according to an embodiment of the present invention;

[0035] Figure 8 A cross-sectional view of an air pump host according to an embodiment of the present invention;

[0036] Fig. 9 This is a schematic diagram of exhaust of an air pump host according to an embodiment of the present invention;

[0037] Fig.10 This is a schematic diagram of the inflation of the air pump host according to an embodiment of the present invention;

[0038] Fig.11 An exploded view of an external housing and accessories according to an embodiment of the present invention;

[0039] Fig.12 A partial cross-sectional view of the combined structure of the motor and the fan blade assembly according to an embodiment of the present invention;

[0040] Fig.13 It is a schematic diagram of assembling the buckled outer shell and the inner mounting shell according to an embodiment of the present invention;

[0041] Fig.14 It is a schematic diagram of assembling the outer shell and the inner mounting shell at another angle according to an embodiment of the present invention;

[0042] Fig.15 Schematic diagram of airflow passing through a fan blade assembly in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0044] In this embodiment, the air pump main unit is used in conjunction with an external shell, so the end of the outer shell of the air pump main unit located at the bottom of the external shell is defined as the lower end, and the end located at the opening end of the external shell is defined as the upper end, and other parts of the air pump main unit are also defined in this way.

[0045] In this embodiment, two push rods are used as an example for detailed description, and the number of parts associated with the push rods is consistent with that of the push rods; the detachable connection mentioned in this embodiment means that the two connected components can be installed and disassembled without the aid of special tools.

[0046] like Figure 5-6 As shown, an embodiment of the present invention provides a linear air pump, including a shell 1, a mounting bracket 2 and a motor 3 arranged in the shell, a PCB board 4 connected to the motor 3, and also including a fan blade assembly 5 located in the shell 1 and connected to one end of the motor; a mainboard fixing cover 6 fixedly arranged at the upper end of the shell, a ventilation hole 601 arranged in the mainboard fixing cover, and a rotating cover 7 arranged at the upper end of the shell 1 and rotatable relative to the shell, the mainboard fixing cover 6 is located in the rotating cover 7, and a plurality of airflow holes 701a for connecting the inside of the rotating cover with the outside are arranged in the panel 701 of the rotating cover 7, and the airflow holes 701a are densely distributed in the panel 701, and the specific number is not specified. There are special restrictions; a sliding cover 8 and two convex teeth 9 fixed on the inner bottom surface of the rotating cover 7, the sliding cover 8 is used to open or close the ventilation hole 601; a bottom cover 10 is arranged at the lower end of the outer shell 1; two top rods 11 are arranged in the outer shell 1 along the longitudinal direction of the outer shell 1 and can move along the longitudinal direction of the outer shell, each top rod 11 is sleeved with a reset spring 12, here, the number of convex teeth 9 corresponds to the number of top rods 11; the upper end of the top rod 11 extends out from the through hole provided in the mainboard fixed cover 6, the lower end of the top rod 11 is connected to the bottom cover 10, one end of the reset spring 12 is in contact with the supporting surface 1101 on the top rod, and the other end is connected to the bottom cover 10.

[0047] The two protruding teeth 9 are integrally formed with the rotating cover 7 .

[0048] like Figure 5As shown, in order to synchronously turn on the motor 3 when the rotating cover is rotated, two Hall switches 39 are provided on the PCB board 4, and a magnet 40 is provided on the inner bottom surface of the rotating cover. When the rotating cover 7 is rotated clockwise, the magnet 40 contacts the Hall switch 39 on the left side, and the motor can be turned on; conversely, when the rotating cover 7 is rotated counterclockwise, the magnet contacts the Hall switch 39 on the right side, and the motor 3 can also be turned on.

[0049] like Figure 1-4 and Fig.11 As shown, in order to realize the detachable connection between the air pump main unit and large-capacity inflatable products such as inflatable tents, air beds, air cushions, etc., that is, to facilitate the installation and disassembly of the air pump main unit, it further includes an external shell 13 detachably connected to the outer shell 1, an elastic bracket assembly 14 arranged at the inner bottom of the external shell and in contact with the lower end of the top rod, a lower ventilation hole arranged in the bottom plate 1301 of the external shell 13, and an air-blocking cover 15 arranged below the bottom of the external shell 13 and connected to the elastic bracket assembly 14; the air-blocking cover 15 can move longitudinally relative to the external shell 13 to close or open the lower ventilation hole; the outer shell 1 is arranged in the external shell 13, and the rotating cover 7 is located outside the open end of the external shell 13; the bottom cover 10 is located above the elastic bracket assembly 14, and in the initial state, the two are connected or disconnected. Here, the connection between the bottom cover 10 and the elastic bracket assembly 14 means that the two are in contact with each other, and the two are not necessarily connected together by a connecting piece. Of course, the two can also be disconnected from each other.

[0050] like Figure 5-6 As shown, a first air duct 37 and a second air duct 38 are further provided in the mounting bracket 2 along its length direction. Both ends of the first air duct 37 and the second air duct 38 are provided with openings and the upper ends of the first air duct 37 and the second air duct 38 are located in the ventilation hole 601 and the lower ends are fixedly connected to the lower end of the mounting bracket 2.

[0051] Here, the lower opening (not shown) of the first air duct 37 is located at the side wall of the lower end of the mounting bracket 2, and the lower opening 3801 of the second air duct 38 is located in the lower end plate of the mounting bracket 2. Fig.10 shown.

[0052] The first air duct 37 and the second air duct 38 of the present embodiment are made of an arc-shaped flat tube with openings at both ends, and the upper ends of the two are arranged side by side in the ventilation hole 601.

[0053] like Fig. 9As shown, when exhausting (extracting air), the rotating cover 7 rotates, and the sliding cover 8 closes the upper openings of the first air channel 37 and the second air channel 38. At this time, the lower opening 3801 of the second air channel 38 is connected to the inflatable product through the lower ventilation hole. The airflow of the inflatable product passes through the lower ventilation hole, the second air channel 38, the sliding cover 8, the first air channel 37 and the lower opening of the first air channel 37 on the side wall of the mounting bracket in sequence to enter the mounting bracket 2, pass through the motor 3 and the fan blade assembly 5, and then be discharged from the rotating cover 7 through the ventilation hole 601 and the airflow hole 701a, that is, discharged from the air pump host. Also refer to Figure 5 As shown, in this process, surface B of the fan blade assembly is the suction surface.

[0054] like Fig.10 As shown, during inflation, the rotating cover 7 rotates, and the sliding cover 8 closes the upper opening of the second air channel 38 and a section of the ventilation hole 601. At this time, the fan blade assembly 5 rotates with the motor 3, and the external air passes through the air flow hole 701a, the ventilation hole 601, the first air channel 37 and the lower opening of the first air channel 37 on the side wall of the mounting bracket to enter the mounting bracket 2 in sequence. The pressurized air after passing through the motor 3 and the fan blade assembly 5 continues to pass through the sliding cover 8, the second air channel 38, and the lower opening 3801, and finally enters the inflatable product through the lower ventilation hole for inflation. Also refer to Figure 5 As shown, in this process, surface A of the fan blade assembly is the inflation surface.

[0055] like Figure 5-6 , Figure 8 As shown, in order to accommodate the lower end of the mounting bracket 2, an inner opening 101 is provided at the lower end of the outer shell 1, and the lower end of the mounting bracket 2 is located in the inner opening 101; at the lower end of the mounting bracket 2, a mounting ring body 201 is provided which is integrally formed therewith and extends to the outside of the lower end of the outer shell, and the upper surface of the mounting ring body 201 is combined with the lower end surface of the outer shell 1.

[0056] like Figure 5-6 , Figure 8 As shown, based on the needs of sealing and preventing air leakage, a first sealing ring 16 is provided at the junction of the mounting ring body 201 and the lower end surface of the outer shell 1; a second sealing ring 17 is provided on the surface of the mainboard fixing cover 6, and the second sealing ring 17 is located at the ventilation hole 601; in the initial state, when the sliding cover 8 closes the ventilation hole 601, the surface of the sliding cover is tightly fitted with the second sealing ring 17, that is, the second sealing ring 17 is used to seal the junction of the sliding cover 8 and the mainboard fixing cover 6.

[0057] In this embodiment, the PCB board 4 is arranged on the surface of the mainboard fixing cover 6 and is located in the rotating cover 7; a battery 18 electrically connected to the PCB board is arranged in the mounting bracket 2; and a charging interface 19 is arranged on the PCB board 4. The air pump of this embodiment can be powered by a battery or connected to a mains power supply.

[0058] like Figure 5-8 As shown, it also includes a cover 20 embedded in the rotating cover 7, the upper surface of the cover is exposed from the central hole 701b in the panel 701 of the rotating cover 7, an upper decorative sheet 21 is provided on the surface of the cover, and a charging hole 22 for exposing the charging interface is provided in the cover 20 and the upper decorative sheet 21, and a soft rubber plug 23 is provided at the charging hole 22 that is detachably connected to the charging hole 22. The soft rubber plug 23 is used to close the charging hole 22 to prevent dust and liquid from entering the rotating cover 7.

[0059] like Figure 8 and 12 As shown, the motor 3 and the fan blade assembly 5 are arranged in the mounting bracket 2, and the fan blade assembly 5 includes a circular shell 501 fixedly connected to one end of the motor, a plate 502 arranged in the circular shell and connected to the motor output shaft, a ring-shaped first blade group 503 composed of multiple first blades arranged on the surface of the plate, and a ring-shaped second blade group 504 composed of multiple second blades arranged on the inner wall of the circular shell 501; the circular shell 501 is fixedly connected to the mounting bracket 2.

[0060] When the air pump is working, the air flow Figure 8 The air flows into the central hole of the circular shell 501 shown, passes through the first blade group 503, and the first blade group 503 rotates counterclockwise at high speed as the motor rotates, and the airflow enters the second blade group 504 area. The wind direction of the second blade group 504 is clockwise from top to bottom. The second blade group 504 is a static blade group. The counterclockwise rotation of the first blade group 503 and the clockwise airflow channel of the second blade group 504 form a cut wind, and then form a high-pressure wind. Such a structure is adopted, which is convenient for improving the efficiency of the fan blade assembly 5.

[0061] like Figure 5-6 and Figure 8 As shown, the bottom cover 10 is not directly connected to the lower end of the housing 1, and the bottom cover 10 is arranged inside the lower end of the mounting bracket 2; a lower bottom plate 1001 is arranged at the lower end of the bottom cover 10, and the lower bottom plate 1001 is integrally formed with the bottom cover 10 and a step surface 1004 is formed at the junction of the two;

[0062] A lower center hole 1003 penetrating the lower bottom plate 1001 is defined in the bottom cover 10 .

[0063] Here, a third sealing ring 24 is provided on the step surface 1004 .

[0064] like Figure 5-6As shown, in order to install and guide the top rod 11, two longitudinal cylinders 25 are provided on the mounting bracket 2, and the number of the longitudinal cylinders 25 corresponds to the number of the top rods 11; two longitudinal connecting cylinders 26 are provided on the inner surface of the bottom cover 10, and two inner through holes 1002 are provided in the bottom cover 10, which penetrate the lower bottom plate 1001 and are coaxial and connected with the longitudinal connecting cylinders 26 respectively; the two longitudinal connecting cylinders 26 are respectively inserted into the lower end parts of the two longitudinal cylinders 25, so the longitudinal cylinders 25, the longitudinal connecting cylinders 26 and the inner through holes 1002 are coaxial. The mounting bracket 2 and the two longitudinal cylinders 25 are integrally formed; the bottom cover 10 and the two longitudinal connecting cylinders 26 are integrally formed. As shown Figure 8 As shown, the two push rods 11 are inserted into the longitudinal cylinder 25, the longitudinal connecting cylinder 26 and the inner through hole 1002 and the push rods 11 can move relative to the three; a fifth sealing ring 27 is sleeved outside the longitudinal connecting cylinder 26; the fifth sealing ring 27 is located at the root of the longitudinal connecting cylinder 26 connected to the inner surface of the bottom cover 10, and the lower end surface of the longitudinal cylinder 25 is in contact with the fifth sealing ring 27.

[0065] Specifically, the other end of the return spring 12 of this embodiment is located in the free end of the longitudinal connecting tube 26 , that is, the other end of the return spring 12 is connected to the free end of the longitudinal connecting tube 26 to achieve indirect connection between the return spring 12 and the bottom cover 10 .

[0066] like Figure 6 As shown, a lower decorative sheet 28 is provided on the bottom surface of the lower base plate 1001, and two notches 2801 corresponding to the inner through holes 1002 are provided at the edge of the lower decorative sheet so that the lower end of the top rod 11 can pass through; a lower through hole 2802 coaxial with the lower center hole 1003 is provided in the lower decorative sheet 28.

[0067] like Fig.11 As shown, for sealing requirements, a fourth sealing ring 29 is provided on the surface of the air-tight cover 15 that is combined with the bottom surface of the bottom plate of the external housing 13 .

[0068] In this embodiment, the elastic support assembly 14 includes a strip-shaped body 1401, two connecting columns 1402 and an intermediate column 1403 arranged on the bottom surface of the strip-shaped body, and two upper ends of the lower return spring 1404 respectively mounted on the two connecting columns; the free end of the intermediate column 1403 extends downward along the lower ventilation hole and is fixedly connected to the air-locking cover 15.

[0069] In order to install the two lower return springs 1404, two connecting bosses 1302 are provided on the bottom surface of the bottom plate of the external shell 13, and each connecting boss 1302 is provided with a receiving hole (not shown) connected to the inside of the external shell 13, and the free ends of the two connecting bosses 1402 are respectively located in the two receiving holes, and the lower ends of the two lower return springs 1404 are respectively in contact with the bottom surfaces of the two receiving holes, that is, the bottom surfaces of the receiving holes provide support for the lower return springs 1404.

[0070] After the air pump mainframe and the external housing 13 are assembled together, the bottom cover 10 is actually located on the elastic support assembly 14 and the two are in contact with each other.

[0071] like Figure 7-8 As shown, in order to realize the detachable connection between the external shell 13 and the housing 1, two buckle assemblies for connecting with the external shell 13 are symmetrically provided on the outer wall of the housing.

[0072] like Figure 4 and Fig.11 As shown, two side accommodating parts 1303 corresponding to the two snap-on components are symmetrically provided on the two side walls of the external shell 13, and an operating port 1304 is provided at the upper end of the side accommodating part. The operating port is used for inserting a finger into the external shell 13 to press the snap-on component; a first latch tooth 1305 is provided on the inner wall of each side accommodating part 1303; the side accommodating part 1303 is integrally formed with the external shell 13.

[0073] like Figure 5-6 and Figure 13-14 As shown, the buckle assembly includes a buckle shell 30 fixedly connected to the outer wall of the shell 1, an inner mounting shell 31 disposed in the buckle shell 30 and rotatably connected to the buckle shell at one end, a pressing shell 32 disposed at the other end of the inner mounting shell 31, a support cylinder 33 disposed in the pressing shell, a side return spring 34 located in the inner mounting shell 31 and contacting the support cylinder 33 at one end and contacting the outer wall of the shell 1 at the other end, and a buckle tooth 35 disposed on the outer surface of the inner mounting shell. Here, the pressing shell 32, the support cylinder 33 and the buckle tooth 35 are integrally formed with the inner mounting shell 31.

[0074] The buckling panel of the buckling shell 30 is provided with two pressing holes 3001 and a buckling hole 3002 for pressing the shell 32 and extending the buckling teeth 35; the buckling teeth 35 are buckled with the first buckling teeth 1305; Figure 4 shown.

[0075] Further, if Figure 13-14As shown, a hinged protrusion 36 is provided on both sides of one end of the inner mounting shell 31 that is rotatably connected to the buckle shell 30, and two hinged notches 3003 are provided at corresponding positions in the buckle shell 30, which are respectively connected to the two hinged protrusions 36. The hinged protrusion 36 is integrally formed with the inner mounting shell 31.

[0076] When the air pump main unit is assembled with the external shell 13, the snap-fitting tooth 35 is snapped with the first snap-fitting tooth 1305. If the air pump main unit needs to be removed, the outer shell 1 is removed, and two fingers are respectively inserted into the external shell 13 from the two operating ports 1304, and the shell 32 is pressed with the fingers to retract the shell 32 into the snap-fitting outer shell 30. The snap-fitting tooth 35 is retracted into the snap-fitting outer shell 30 along with the inner mounting shell 31. At this time, the snap-fitting tooth 35 is disengaged from the first snap-fitting tooth 1305, and the side return spring 34 is compressed, so that the air pump main unit can be removed; after releasing the fingers, the side return spring 34 presses the shell 32 and the snap-fitting tooth 35 back to the initial position.

[0077] This embodiment is described in detail by setting two push rods 11, and the number of parts associated with the push rods 11 is consistent with that of the push rods 11; based on this embodiment, those skilled in the art can easily think of setting more than three push rods 11, and the number of parts associated with the push rods 11 is consistent with that of the push rods 11, and the effect of this embodiment can basically be achieved. However, considering factors such as comprehensive cost and function realization, setting two push rods 11 in this embodiment is the optimal solution.

[0078] To sum up, with the structure of the present invention, the air flow inlet and outlet during exhaust or inflation are respectively located at the two ends of the outer shell 1, and the rotating shaft of the motor 3 is arranged axially along the outer shell 1, so that a linear air flow channel is formed in the outer shell 1; the external shell 13 is fixedly connected to large-capacity inflatable products such as inflatable tents, air beds, air cushions, etc. and is connected to the interior of such products; in the initial state, that is, when the air pump connected to large-capacity inflatable products such as inflatable tents, air beds, air cushions, etc. does not need to be inflated or exhausted, the motor 3 is not started. In this embodiment, the air-blocking cover 15 is in contact with the bottom surface of the bottom plate of the external shell 13, and the lower ventilation hole is closed, so that the inflatable product is isolated from the outside.

[0079] like Fig. 9 , Fig.15As shown, when exhaust (exhaust) is required, the rotating cover 7 is rotated counterclockwise. In this process, the sliding cover 8 moves with the rotating cover 7, the magnet 40 contacts the Hall switch 39 located on the right, the motor 3 is started at the same time, and the convex teeth 9 each rotate to the corresponding push rod 11 and squeeze the upper end of the push rod 11, so that the push rod 11 moves longitudinally along the shell 1, and the push rod 11 squeezes the reset spring 12 when moving; at the same time, the lower end of the push rod 11 passes through the bottom cover 10 to squeeze the elastic bracket assembly 14, and the elastic bracket assembly 14 moves longitudinally along the external shell 13, and the air-blocking cover 15 is separated from the bottom plate 1301 of the external shell 13, and the lower ventilation hole is opened; at this time, the sliding cover 8 closes the upper end openings of the first air duct 37 and the second air duct 38, and the lower end opening 3801 of the second air duct 38 passes through the lower center hole 1003, the lower through hole 2802 and the lower ventilation hole are connected with the inflatable product, and the airflow of the inflatable product passes through the lower ventilation hole, the second air duct 38, the sliding cover 8, the first air duct 37 and the lower end opening of the first air duct 37 on the side wall of the mounting bracket in sequence to enter the mounting bracket 2, pass through the motor 3 and the fan blade assembly 5, and then be discharged out of the rotating cover 7 through the ventilation hole 601 and the air flow hole 701a, that is, discharged out of the air pump main unit, to complete the exhaust of large-capacity inflatable products such as inflatable tents, air beds, and air cushions; after the exhaust is completed, the rotating cover 7 is rotated, the convex tooth 9 is disengaged from the upper end of the push rod 11, and the push rod 11 returns to its original position under the action of the reset spring 12, at this time the motor 3 is turned off, the elastic bracket assembly 14 is reset to its initial position, the air-blocking cover 15 closes the lower ventilation hole, and the inflatable product is isolated from the outside.

[0080] like Fig.10 As shown, when inflation is required, rotate the rotating cover 7 clockwise. During this process, the sliding cover 8 moves with the rotating cover 7, the magnet 40 contacts the Hall switch 39 on the left, and the motor 3 is started at the same time. During this process, the movement mode of the top rod 11, the elastic support assembly 14 and the air-locking cover 15 is consistent with the exhaust process, which will not be described in detail here; at this time, the sliding cover 8 closes the upper end opening of the second air duct 38 and a section of the ventilation hole 601, and the fan blade assembly 5 rotates with the motor 3. External air passes through the air flow hole 701a, the ventilation hole 601, the first air duct 37 and the lower end opening of the first air duct 37 on the side wall of the mounting bracket to enter the mounting bracket 2 in sequence. The pressurized air after passing through the motor 3 and the fan blade assembly 5 continues to pass through the sliding cover 8, the second air duct 38, and the lower end opening 3801, and finally enters the inflatable product through the lower ventilation hole for inflation. After inflation is completed, the rotating cover 7 is rotated, the convex tooth 9 is disengaged from the upper end of the push rod 11, and the push rod 11 returns to its original position under the action of the return spring 12. At this time, the motor 3 is turned off, the elastic bracket assembly 14 is reset to the initial position, and the air-blocking cover 15 closes the lower ventilation hole, isolating the inflated product from the outside world.

[0081] In addition to being used in conjunction with the external shell 13 to inflate or exhaust large-capacity inflatable products, the air pump main unit of the present invention can also be removed from the external shell 13 and used as an independent air pump for various purposes such as inflating and exhausting other objects.

[0082] In the above description, it should be noted that the terms "installed", "connected", "connected" and other corresponding terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components.

[0083] Obviously, the embodiments described above are only some embodiments of the present invention, not all embodiments. The preferred embodiments of the present invention are given in the drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Any equivalent structure made by using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A linear air pump, comprising a housing, a mounting bracket and a motor arranged in the housing, and a PCB board connected to the motor, characterized in that: Also includes: A fan blade assembly is located in the housing and connected to one end of the motor; A mainboard fixing cover fixedly mounted on the upper end of the housing, and a ventilation hole disposed in the mainboard fixing cover; A rotating cover is arranged at the upper end of the outer shell and can rotate relative to the outer shell, the mainboard fixed cover is located inside the rotating cover, and a plurality of air flow holes for connecting the inside of the rotating cover with the outside are arranged in the panel of the rotating cover; A sliding cover and at least two protruding teeth fixedly mounted on the inner bottom surface of the rotating cover; A bottom cover disposed at the lower end of the housing; At least two push rods are arranged in the shell along the longitudinal direction of the shell and can move in the longitudinal direction of the shell, and each push rod is sleeved with a return spring; the upper end of the push rod extends from the through hole provided in the mainboard fixed cover, the lower end of the push rod is connected to the bottom cover, one end of the return spring contacts the support surface on the push rod, and the other end is connected to the bottom cover; an external housing detachably connected to the housing; An elastic support assembly is arranged at the inner bottom of the external shell and contacts the lower end of the top rod; a lower ventilation hole is arranged in the bottom plate of the external shell; an air-blocking cover is arranged below the bottom of the external shell and connected to the elastic support assembly; the air-blocking cover can move longitudinally relative to the external shell to close or open the lower ventilation hole; The housing is arranged in the external housing, the rotating cover is located at the opening end of the external housing; the bottom cover is located above the elastic bracket assembly; When inflation or exhaust is required, the rotating cover is rotated clockwise or counterclockwise. In this process, the sliding cover moves with the rotating cover and moves to different positions of the ventilation hole, which are used to open the exhaust channel or the inflation channel respectively; the convex teeth respectively rotate to the corresponding push rod and squeeze the upper end of the push rod, so that the push rod moves longitudinally along the shell.

2. A linear air pump as claimed in claim 1, characterized in that: A first air duct and a second air duct are also provided in the mounting bracket along its length direction. Both ends of the first air duct are provided with openings, and the upper ends of the first air duct are located in the ventilation hole, and the lower ends are fixedly connected to the lower end of the mounting bracket.

3. A linear air pump as claimed in claim 2, characterized in that: The lower end opening of the first air channel is located at the side wall of the lower end of the mounting bracket, and the lower end opening of the second air channel is located in the end plate of the lower end of the mounting bracket.

4. A linear air pump as claimed in claim 2, characterized in that: Two Hall switches are arranged on the PCB board, and a magnet is arranged on the inner bottom surface of the rotating cover.

5. A linear air pump as claimed in claim 3, characterized in that: An inner opening is provided at the lower end of the shell, and the lower end of the mounting bracket is located in the inner opening; a mounting ring body is provided at the lower end of the mounting bracket, which is integrally formed with the mounting bracket and extends to the outside of the lower end of the shell, and the upper surface of the mounting ring body is combined with the lower end surface of the shell.

6. A linear air pump as claimed in claim 5, characterized in that: The motor and fan blade assembly are arranged in a mounting bracket, and the fan blade assembly includes a circular shell fixedly connected to one end of the motor, a plate arranged in the circular shell and connected to the motor output shaft, a ring-shaped first blade group composed of multiple first blades arranged on the surface of the plate, and a ring-shaped second blade group composed of multiple second blades arranged on the inner wall of the circular shell; the circular shell is fixedly connected to the mounting bracket.

7. A linear air pump as claimed in claim 5, characterized in that: A first sealing ring is provided at the junction of the mounting ring body and the lower end surface of the shell; a second sealing ring is provided on the surface of the mainboard fixing cover, and the second sealing ring is located at the ventilation hole.

8. A linear air pump as claimed in claim 5, characterized in that: The PCB board is arranged on the surface of the mainboard fixed cover and is located in the rotating cover; a battery electrically connected to the PCB board is arranged in the mounting bracket; and a charging interface is arranged on the PCB board.

9. A linear air pump as claimed in claim 5, characterized in that: The bottom cover is arranged inside the lower end of the mounting bracket, and a lower bottom plate is arranged at the lower end of the bottom cover; the lower bottom plate and the bottom cover are integrally formed and a step surface is formed at the junction of the two; a lower center hole penetrating the lower bottom plate is arranged in the bottom cover.

10. A linear air pump as claimed in claim 9, characterized in that: A third sealing ring is arranged on the step surface.

11. A linear air pump as claimed in claim 9, characterized in that: At least two longitudinal cylinders are arranged on the mounting bracket, at least two longitudinal connecting cylinders are arranged on the inner surface of the bottom cover, and at least two inner through holes penetrating the lower bottom plate and being coaxial and connected with the longitudinal connecting cylinders are arranged in the bottom cover; the longitudinal connecting cylinders are respectively inserted into the lower end parts of the longitudinal cylinders.

12. A linear air pump as claimed in claim 11, characterized in that: The push rod is inserted into the longitudinal cylinder, the longitudinal connecting cylinder and the inner through hole and can move relative to the three; a fifth sealing ring is sleeved outside the longitudinal connecting cylinder; the fifth sealing ring is located at the root of the longitudinal connecting cylinder connected to the inner surface of the bottom cover, and the lower end surface of the longitudinal cylinder is in contact with the fifth sealing ring.

13. A linear air pump as claimed in claim 11, characterized in that: The other end of the return spring is arranged in the free end of the longitudinal connecting tube.

14. A linear air pump as claimed in claim 12, characterized in that: A lower decorative sheet is provided on the bottom surface of the lower bottom plate, at least two notches corresponding to the inner through holes are provided at the edge of the lower decorative sheet, and a lower through hole coaxial with the lower center hole is provided in the lower decorative sheet.

15. A linear air pump as claimed in claim 8, characterized in that: It also includes a face cover embedded in the rotating cover, the upper surface of the face cover is exposed from the central hole in the panel of the rotating cover, an upper decorative sheet is provided on the surface of the face cover, a charging hole for exposing the charging interface is provided in the face cover and the upper decorative sheet, and a soft rubber plug is provided at the charging hole that is detachably connected to the charging hole.

16. A linear air pump as claimed in claim 1, characterized in that: Two buckle assemblies for connecting with the external shell body are symmetrically arranged on the outer wall of the shell body.

17. A linear air pump as claimed in claim 16, characterized in that: It also includes a fourth sealing ring arranged in the surface of the air-blocking cover combined with the bottom surface of the external shell.

18. A linear air pump as claimed in claim 17, characterized in that: The elastic bracket assembly includes a strip-shaped body, two connecting columns and an intermediate column arranged on the bottom surface of the strip-shaped body, and two upper ends of the lower return springs respectively sleeved on the two connecting columns; the free end of the intermediate column extends downward along the lower ventilation hole and is fixedly connected to the air-blocking cover.

19. A linear air pump as claimed in claim 18, characterized in that: Two connecting bosses are provided on the bottom surface of the bottom plate of the external shell, each connecting boss is provided with a receiving hole connected to the inside of the external shell, the free ends of the two connecting bosses are respectively located in the two receiving holes, and the lower ends of the two lower return springs are respectively in contact with the bottom surfaces of the two receiving holes.

20. A linear air pump as claimed in claim 16, characterized in that: Two side accommodating parts corresponding to the two buckle assemblies are symmetrically arranged on the two side walls of the external shell, an operating port is arranged at the upper end of the side accommodating part, and a first latching tooth is arranged on the inner wall of each side accommodating part.

21. A linear air pump as claimed in claim 20, characterized in that: The snap-on assembly includes a snap-on shell fixedly connected to the outer wall of the shell, an inner mounting shell arranged in the snap-on shell and rotatably connected to the snap-on shell at one end, a pressing shell arranged at the other end of the inner mounting shell, a supporting tube arranged in the pressing shell, a side return spring located in the inner mounting shell and contacting the supporting tube at one end and contacting the outer wall of the shell at the other end, and a snap-on tooth arranged on the outer surface of the inner mounting shell.

22. A linear air pump as claimed in claim 21, characterized in that: The buckling panel of the buckling shell is respectively provided with two pressing holes and a buckling hole for pressing the shell and extending the buckling teeth; the buckling teeth are buckled with the first buckling teeth.

23. A linear air pump as claimed in claim 21, characterized in that: A hinged protrusion is respectively arranged on both side surfaces of one end of the inner mounting shell which is rotatably connected with the buckled outer shell, and two hinged notches which are respectively connected with the two hinged protrusions are arranged at corresponding positions in the buckled outer shell.

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