Miniature inflation pump arranged in small inflation product

Abstract

The invention discloses a miniature inflator pump built in a small inflatable product, relates to the technical field of inflator pumps, and aims at solving the problems that an existing inflation mode of the small inflatable product is poor in sanitation, poor in portability, large in size and the like. The inflator pump comprises a cylindrical inflator pump main body, an elastic compression ring and an air inlet cabin, wherein the inflator pump main body comprises a main board with a universal power interface, a motor lock seat, a motor socket, a micro motor, an impeller, an outer cover and a rebound pad; a three-dimensional positioning structure with one main part and two inner auxiliary parts and two outer auxiliary parts is adopted to guarantee the stability of components, and a rebound pad sealing structure with inflation pushing open / inflation stopping plug returning is adopted to achieve efficient pressure maintaining; a storage battery module is abandoned, an external mobile phone or a power bank is connected through a data line for power supply, and charging is achieved when the charger is used. The air inlet device is embedded in a small inflatable product, only an ultra-thin air inlet cabin is exposed, and the air inlet device has the advantages of being sanitary, clean, portable, small in size and reliable in sealing, and meets the using requirements for light weight and attractiveness of the small inflatable product such as a waist rest, a neck pillow, a headrest, a throw pillow and a cushion.

Description

Technical Field

[0001] This invention relates to the field of air pump technology, and more specifically to a miniature air pump built into a small air-filled product. Background Technology

[0002] Large inflatable products, such as medical mattresses, outdoor mattresses, car mattresses, and tents, are typically inflated using external inflatable products, such as air pumps or manual pumps, to save inflation time due to their large inflation space. However, these air pumps are inconvenient to carry.

[0003] To address the issue of portability, some products now feature built-in air pumps with rechargeable batteries, such as the 2025301039667 air mattress (with a built-in inflation / deflation pump). While the pump is relatively large, its built-in design is still acceptable compared to other large inflatable products. There are also some mattresses with self-pressurizing features, such as the 2024220459512 self-inflating air mattress. The press-in air bladders occupy some space on the mattress, but their pressure-inflating design is also acceptable compared to other large inflatable products.

[0004] Existing small inflatable products include: lumbar supports, neck pillows, headrests, cushions, seat cushions, pet seats, etc.

[0005] If these small inflatable products were to be compared to the air pumps and manual pumps used for large inflatable products, they would not only be extremely inconvenient to carry, but would also be a waste of their potential.

[0006] These small inflatable products, such as the inflatable mat (with built-in inflation / deflation pump) exemplified by model 2025301039667, suffer from the typical problem of being overkill, resulting in bulky and unattractive products. Existing external air pumps (including electric and manual models) are designed to accommodate various inflation scenarios, but generally suffer from functional redundancy and excessive size (standard manual pumps are ≥10cm in length, and electric models weigh ≥200g). They require additional storage space when carried, contradicting the "lightweight use" requirement of small inflatable products (lumbar supports, neck pillows, etc.). Manual pumps also require continuous manual pressing / pulling, making operation cumbersome and laborious. Existing built-in battery air pumps require the integration of battery modules and charging management modules to achieve independent power supply, resulting in a large overall size and heavy weight. When embedded in small air pumps, they become bulky and heavy, and may not even fit into the internal installation space of thin products (such as thin neck pillows). At the same time, battery modules are prone to aging and battery life reduction. After long-term use, the battery is easily damaged and the small air pump will be scrapped.

[0007] These types of small inflatable products, such as the self-inflating press-type air mattress (reference 2024220459512), also suffer from the typical problem of poor appearance due to the press-type air bladders protruding from the main air bladder. The inflatable product appears patched up, with a large, noticeable bulge. Existing press-type air bladder structures require independent air bladders on the product surface. These bladders protrude from the main air bladder surface, not only disrupting the overall aesthetic design and creating an "abrupt" bulge, but also causing localized pressure during use (e.g., neck pillows against the neck, lumbar supports against the waist), affecting comfort. Furthermore, repeated pressing of the air bladders can lead to sealing failure and elasticity loss, resulting in decreased inflation efficiency.

[0008] These small inflatable products can actually be inflated manually. In the current technology, manual inflation is a common and simple method for small inflatable products, but it has two major drawbacks: First, the airflow directly carries saliva into the product, which can easily breed bacteria and cause cross-contamination, posing a serious hygiene hazard; Second, manual inflation pressure is insufficient, the airflow is not continuous, inflation takes a long time (usually 3-5 minutes), and it is difficult to inflate to the ideal fullness.

[0009] Existing small inflatable products generally have structural or sealing defects in their inflation methods: the plug-in inflation interface of the external air pump is prone to air leakage, the sealing gasket of the manual pump is prone to wear, the elastic material of the press-type air bladder is prone to aging, and the built-in battery air pump is prone to loose assembly due to the large number of parts, resulting in unstable airflow during inflation and air leakage after inflation stops (usually the air pressure drops by ≥10% within 24 hours).

[0010] To address the aforementioned issues, it is of great significance to design a lightweight, aesthetically pleasing, convenient, and hygienic miniature air pump that can be integrated into small inflatable products. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of the prior art and provide a miniature air pump built into a small inflatable product, solving the following technical problems:

[0012] The above-mentioned objectives of the present invention are achieved by the following technical means:

[0013] A miniature air pump built into a small inflatable product includes a cylindrical air pump body 1, an elastic pressure ring 2, and an air intake chamber 3.

[0014] The air pump body 1 includes a main board 4 with a power interface 41, a motor lock seat 5, a motor socket 6, a micro motor 7, an impeller 9, an outer cover 8 connected to the elastic pressure ring 2, and a rebound pad 10.

[0015] The motor lock seat 5 is connected to the motor socket 6, the motor socket 6 is connected to the outer cover 8, and the outer cover 8 is connected to the spring pad 10.

[0016] The motor lock base 5 has a wire hole 52, and also includes a central motor slot 511 that communicates with the wire hole 52 and first auxiliary column slots 512 on both sides.

[0017] The motor socket 6 is separated from the impeller lower chamber 611 by a first air passage plate 61 having a first air guide hole 64; the outer cover 8 is separated from a spring pad chamber 83 and an impeller upper chamber 84 by a second air passage plate 82 having a second air guide hole 85; after the motor socket 6 is inserted into the outer cover 8, the space defined by the impeller lower chamber 611 and the impeller upper chamber 84 forms an impeller chamber, and the impeller chamber is provided with an impeller 9.

[0018] At the bottom of the impeller lower compartment 611, a motor compartment 65 for mounting a micro motor 7 is centrally located. A pair of first auxiliary columns 67 and a pair of second auxiliary columns 68 are arranged opposite to each other around the motor compartment 65. The bottom of the micro motor 7 is inserted into the motor slot 511. The first auxiliary columns 67 are inserted into the first auxiliary column slot 512 and screwed to the motor lock seat 5. The second auxiliary columns 68 are screwed to the main board 4.

[0019] The outer wall of the motor socket 6 has several guide grooves 69, and the outer cover 8 has several guide rails 87 that match the guide grooves 69. The motor socket 6 is inserted into the guide rails 87 of the outer cover 8 through the guide grooves 69.

[0020] The main board 4 is electrically connected to a micro motor 7 via a wire leading out from the wire hole 52. The motor output end 71 extends out of the first air passage plate 61 and connects to the impeller 9.

[0021] The second air passage plate 82 has an insertion hole 86 in the center. The rebound pad 10 is an elastic pad. The rebound pad 10 has a snap-back soft rubber post 101 in the middle that is compatible with the insertion hole 86. The rebound pad 10 is detachably and sealed to the rebound pad compartment 83 through the snap-back soft rubber post 101.

[0022] The elastic pressure ring 2 is sealed and built into the inflatable product on one side, and fixed to the outer cover 8 on the other side, and also includes an inner ring 21;

[0023] The air inlet 3, which is exposed on the inflatable product and has a power interface positioning hole 31, is inserted into the inner ring 21 and then the outer cover 8 is inserted. The power interface positioning hole 31 is set to correspond with the power interface 41.

[0024] The power interface 41 supplies power to the micro motor 7 via a data cable connected to a mobile phone or power bank.

[0025] Furthermore, the bottom inner wall of the outer cover 8 has a snap-fit ​​ring groove 881 for inserting the air intake compartment 3, and the bottom outer wall is fitted with an outer ring 882. The outer wall at the end of the air intake compartment 3 has a snap-fit ​​ring opening 34 that cooperates with the snap-fit ​​ring groove 881. The part of the bottom of the outer cover 8 that extends out of the outer ring 882, the snap-fit ​​ring groove 881, and the outer ring 882 form an annular snap sleeve 89. The outer cover 8 is connected to the elastic pressure ring 2 through the annular snap sleeve 89.

[0026] Furthermore, the outer cover 8 is a hard plastic shell, and its outer ring 882 has a number of reinforcing holes 8821 arranged in a circumferential pattern.

[0027] Optionally, the elastic pressure ring 2 is a soft gel, and the elastic pressure ring 2 is injection molded into the annular sleeve 89. The elastic pressure ring 2 forms a convex ring 22 extending from the inner ring 21. The convex ring 22 partially encloses the outer ring 88 and is filled with the reinforcing hole 8821.

[0028] Optionally, the elastic pressure ring 2 is made of hard plastic, and the other side of the elastic pressure ring 2 is provided with a number of locking posts that match the number of the reinforcing holes 8821.

[0029] Preferably, the motherboard 4 also has second locking holes 42 on both sides corresponding to the second auxiliary post 68;

[0030] The first auxiliary column groove 512 of the motor lock seat 5 has a first lock hole 53 corresponding to the first auxiliary column 67.

[0031] One end of the first auxiliary post 67 and the second auxiliary post 68 is provided with a screw hole corresponding to the first lock hole 53 and the second lock hole 42, respectively.

[0032] Preferably, the side wall of the motor socket 6 has a plurality of hollow slots 62, and the side wall portions of adjacent hollow slots 62 form pins 66;

[0033] The pin 66 consists of a pair of first pins 661 that are oppositely arranged and directly connected to the motherboard 4 and a pair of second pins 662 that are oppositely arranged and directly connected to the air intake 3;

[0034] The first auxiliary post 67 is located between the first pin 661 and the motor compartment 65, the second auxiliary post 68 is located inside the second pin 662, and the guide groove 69 is formed on the outer wall of the first pin 661.

[0035] Furthermore,

[0036] The bottom outer edge of the air intake compartment 3 is provided with several air intake holes 33 arranged in a circle;

[0037] The motor lock base 5 is a lip-shaped long-life lock housing structure with an assembly groove 51 and the wire passage hole 52 is opened in the assembly groove 51.

[0038] The assembly slot 51 also includes the motor slot 511 which is centrally located and sandwiched between two sides, and the first auxiliary column slots 512 which are located on both sides and are semi-enclosed.

[0039] The first air passage plate 61 has a motor output port 63 for the motor output end 71 to extend out and a first air guide hole 64 attached to the side wall of the first air passage plate 61 and corresponding to the hollow groove 62.

[0040] The second air passage plate 82 is provided with a plurality of second air guide holes 85.

[0041] Preferably, the micro motor 7 is a coreless motor with the motor output end 71; the total length of the coreless motor is 20mm ± 0.3.

[0042] Preferably, the power interface 41 includes any one of Lightning, USB-C, and USB Type-C power interfaces, and the power interface 41 is connected via any one of the Lightning, USB-C, and USB Type-C data cables.

[0043] Preferably, the outer cover 8 has a constricted section 81, the constricted section 81 is provided with the second air passage plate 82, and the outer wall of the end of the lower impeller compartment 611 has a misaligned opening 6111 that cooperates with the constricted section 81. The lower impeller compartment 611 and the upper impeller compartment 84 are connected by the misaligned opening 6111 and the constricted opening 811 on the inner wall of the constricted section 81 to form the impeller compartment.

[0044] Furthermore, the outer wall of the motherboard 4 is provided with a limiting port 43, and the inner wall of one of the second pins 662 is provided with a limiting strip 6621 that is adapted to the limiting port 43, and a pair of second pins 662 are engaged with the motherboard 4.

[0045] Preferably, the motherboard 4 is further provided with a status light 44, and the air intake 3 is further provided with a status light positioning hole 32, with the status light 44 and the status light positioning hole 32 being provided in a corresponding manner.

[0046] The beneficial effects of adopting the above technical solution are as follows:

[0047] Addressing the shortcomings of existing small inflatable product inflation solutions (manual inflation, external / manual pumps, built-in battery pumps, and press-to-inflate bladder structures) in the background of this invention, this miniature air pump offers the following multi-dimensional benefits:

[0048] 1. Compared to manual inflation, it completely eliminates hygiene concerns and significantly improves inflation efficiency.

[0049] This invention employs a closed-loop clean airflow design consisting of an air intake chamber, an impeller chamber, and an inflation channel. The airflow process is entirely free of human contact, eliminating saliva contamination at its source and ensuring hygiene. The inflation efficiency is more than five times higher than that of manual inflation, solving the problems of "dirtiness and slowness" associated with manual inflation.

[0050] 2. Compared to external air pumps / manual pumps, it eliminates carrying redundancy and achieves ultimate portability.

[0051] This invention adopts a minimalist "battery-free" design, eliminating redundant functional modules of external air pumps and retaining only the core inflation component. It can be directly connected to a mobile phone or power bank for power supply via a universal power interface such as Type-C (no need to carry additional power supply equipment). It also adopts a cylindrical integrated layout (total length 46.5mm, diameter 34.2mm), which can be completely embedded inside a small inflatable product. There is no need to carry it separately. When in use, it can automatically inflate by simply connecting to a power source. This solves the defects of external air pumps that are "cumbersome to carry and laborious to operate", and achieves a portable experience of "product and inflation device integration".

[0052] 3. Compared to built-in battery air pumps, this overcomes size and weight limitations, making it suitable for installation in small products.

[0053] This invention eliminates the need for a separate battery module, utilizing readily available mobile phones and power banks as power sources. This saves over 20% of the volume occupied by the battery and charging management module, resulting in a significant reduction in the weight of the air pump. It can be easily embedded into the internal cavity of various small and thin inflatable products, and it eliminates battery aging issues, extending its service life. This invention solves the pain points of built-in battery air pumps, which are characterized by "large size, heavy weight, and easy battery aging," perfectly meeting the lightweight design requirements of small inflatable products.

[0054] 4. Compared to the press-type air bladder inflation structure, it optimizes the appearance and improves user comfort.

[0055] This invention employs an elastic pressure ring sealed embedded design, completely concealing the air pump body inside the product, with only a tiny air intake chamber (the protrusion is about the thickness of two coins) exposed. This barely affects the flatness of the product surface and visually blends seamlessly with the product, solving the defects of the press-type air bladder: "obtrusive appearance and oppressive use." At the same time, inflation is driven by a motor, eliminating the need for manual pressing, making operation more convenient. Furthermore, the durability of the sealing structure (rebound pad) is far superior to the elastic material of the air bladder, making it less prone to failure with long-term use.

[0056] 5. Compared to existing inflation methods, this enhances structural stability and sealing pressure retention, thereby improving product reliability.

[0057] This invention employs a three-dimensional positioning structure of "one main component, two inner auxiliary components, and two outer auxiliary components" (with precise nesting and fixing of components such as the motor, main board, and outer casing) to ensure no relative displacement of the motor during operation and stable airflow output. Simultaneously, it innovates a "push-open during inflation / block-back when inflation stops" rebound pad sealing structure. During inflation, air pressure automatically pushes open the rebound pad; after inflation stops, the rebound pad uses its own elasticity to block the air passage. Furthermore, the internal air pressure of the product pushes back against the rebound pad to strengthen the seal. The pressure retention effect far exceeds existing inflation methods, solving the core defects of existing technologies such as "unstable inflation and easy leakage," and improving the reliability of small inflatable products. Attached Figure Description

[0058] Figure 1 and Figure 2 This is a schematic diagram of the assembled structure of a miniature air pump built into a small inflatable product.

[0059] Figure 3 yes Figure 1 Cross-sectional view;

[0060] Figure 4 and Figure 5 This is an exploded view of the structure of a miniature air pump built into a small inflatable product.

[0061] Figure 6 and Figure 7 This is a schematic diagram of the air intake structure;

[0062] Figure 8 This is a schematic diagram of an elastic compression ring structure;

[0063] Figure 9 This is a schematic diagram of the motherboard structure;

[0064] Figure 10 and Figure 11 This is a schematic diagram of the motor lock seat structure;

[0065] Figure 12 and Figure 13 This is a schematic diagram of the motor socket structure;

[0066] Figure 14 and Figure 15 This is a schematic diagram of the outer casing structure;

[0067] Figure 16 This is a schematic diagram of the rebound pad structure;

[0068] Figure 17 This is a schematic diagram of a miniature air pump built into a small inflatable product.

[0069] Among them, the air pump body 1;

[0070] 2. Elastic pressure ring; 21. Inner ring; 22. Convex ring;

[0071] Air intake compartment 3; power interface positioning hole 31; status light positioning hole 32; air intake vent 33; card slot ring 34;

[0072] 4. Mainboard; 41. Power connector; 42. Second lock hole; 43. Limiting port; 44. Status lights;

[0073] Motor lock seat 5; assembly slot 51; motor slot 511; first auxiliary column slot 512; wire through hole 52; first lock hole 53;

[0074] Motor socket 6; first air passage plate 61; impeller lower chamber 611; misaligned opening 6111; hollow groove 62; motor output port 63; first air guide hole 64; motor compartment 65; pin 66; first pin 661; second pin 662; limit bar 6621; first auxiliary column 67; second auxiliary column 68; guide groove 69;

[0075] Miniature motor 7; Motor output terminal 71;

[0076] Outer cover 8; constricted section 81; constricted section 811; second air passage plate 82; rebound cushion chamber 83; impeller upper chamber 84; second air guide hole 85; insertion hole 86; guide rail 87; snap ring groove 881; outer ring 882; reinforcing hole 8821; annular ferrule 89;

[0077] Impeller 9;

[0078] 10 rebound pads; 101 snap-back soft rubber posts. Detailed Implementation

[0079] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0080] Example 1

[0081] This embodiment provides a miniature air pump built into a small inflatable product, which adopts a "modular integration + battery-free power supply" design.

[0082] like Figure 1-17 As shown, it includes a cylindrical air pump body 1, an elastic pressure ring 2, and an air intake chamber 3.

[0083] The air pump body 1 includes a main board 4 with a power interface 41, a motor lock seat 5, a motor socket 6, a micro motor 7, an impeller 9, an outer cover 8 connected to the elastic pressure ring 2, and a rebound pad 10.

[0084] The elastic pressure ring 2 is sealed and embedded in the inflatable product on one side, and connected to the outer cover 8 on the other side.

[0085] The air intake 3 is exposed on the inflatable product. After the pressure ring 2 is inserted, it is connected to the outer cover 8. The power interface positioning hole 31 on its surface is precisely aligned with the power interface 41 of the motherboard 4.

[0086] The motor lock seat 5 and the motor socket 6, the motor socket 6 and the outer cover 8, the motor socket 6 and the main board 4, and the outer cover 8 and the air intake 3 form a total of four levels of connection and cooperation.

[0087] The "one main, two inner auxiliary, and two outer auxiliary" positioning structure is as follows: The motor lock seat 5 has a wiring hole 52; the central motor slot 511 and the two side first auxiliary column slots 512 form a motor socket 6; the first air passage plate 61 separates the lower impeller compartment 611; the outer cover 8 is separated from the upper impeller compartment 84 by the second air passage plate 82; after the two are inserted, they enclose the impeller compartment, which houses the impeller 9; the air inlet compartment 3 has an air inlet hole; both the first air passage plate 61 and the second air passage plate 82 have air guide holes. The motor compartment 65 at the bottom of the impeller lower compartment 611 is equipped with a micro motor 7; the bottom of the micro motor 7 is inserted into the centrally located motor slot 511, and the first auxiliary columns 67 surrounding the motor compartment 65 are inserted into the first auxiliary column slots 512 on both sides of the motor lock seat 5 and screwed to form a "one main and two inner auxiliary" positioning structure; the pair of second auxiliary columns 68 surrounding the motor compartment 65 are screwed to the main board 4 to form a "two outer auxiliary" positioning structure; the guide groove 69 of the motor socket 6 is slidably inserted into the guide rail 87 of the outer cover 8.

[0088] The "Inflation Push-Open / Inflation Stop Back-Close" switching structure: The snap-back soft rubber column 101 of the rebound pad 10 and the insertion hole 86 of the second air passage plate 82 can be separated and sealed in the rebound pad chamber 83, forming the "Inflation Push-Open / Inflation Stop Back-Close" switching structure. When inflating, the air pressure pushes the rebound pad 10, and then the snap-back soft rubber column 101 pushes the rebound pad 10 to separate the rebound pad 10 from the rebound pad chamber 83. Air enters the small inflatable product from the gap between the rebound pad chamber 83 and the rebound pad 10 for inflation. When inflation stops, the air pressure is released, and the snap-back soft rubber column 101 elastically pulls the rebound pad 10 back to seal the rebound pad chamber 83. After full inflation, the internal air pressure of the small inflatable product pushes the rebound pad 10 back, and the snap-back soft rubber column 101 exerts force in the same direction to further ensure the sealing of the rebound pad 10, ensuring the long-term inflation effect of the small inflatable product.

[0089] The wires of the motherboard 4 are connected to the micro motor 7 through the wire hole 52. The motor output end 71 extends out of the first air passage plate 61 to drive the impeller 9. The power interface 41 can be connected to a mobile phone or power bank for convenient power supply and inflation via any of the following data cables: Lightning, USB-C, or USB Type-C.

[0090] Example of assembling a miniature air pump and installing it within a small inflatable product:

[0091] The motor compartment 65 at the bottom of the impeller lower compartment 611 is equipped with a micro motor 7; the bottom of the micro motor 7 is inserted into the central motor slot 511 of the motor socket 6. A pair of first auxiliary posts 67 surrounding the motor compartment 65 are inserted into the first auxiliary post slots 512 on both sides of the motor lock seat 5 and screwed in to form a "one main, two inner auxiliary" positioning structure; a pair of second auxiliary posts 68 surrounding the motor compartment 65 are screwed in to the main board 4 to form a "two outer auxiliary" positioning structure. This results in a "one main, two inner auxiliary + two outer auxiliary" positioning structure. "The positioning structure forms the internal three-dimensional fixed frame of the air pump body 1; the guide groove 69 of the motor socket 6 and the guide rail 87 of the outer cover 8 are slidably inserted to form an inner and outer nested structure; the impeller lower chamber 611 and the impeller upper chamber 84 enclose each other to form the impeller chamber, and the impeller 9 is built into the impeller chamber; the motor output end extends out of the motor socket 6 to connect to the impeller 9; the rebound pad 10 is detachably and sealed to the rebound pad chamber 83; the outer cover 8 is connected to the elastic pressure ring 2, and one side of the elastic pressure ring 2 is sealed and embedded in the small inflatable product by high temperature hot pressing or high frequency voltage; the air inlet chamber 3 is tightly inserted from the inner ring 21 and then inserted into the outer cover 8."

[0092] It should be noted that this application protects the overall structure of the battery-free miniature air pump and the collaborative relationship between the various assembly modules. The purpose of the battery-free design of this invention is to save battery space and make the miniature air pump smaller. It can be started by connecting a mobile phone or power bank to the motherboard via a data cable, which in turn powers the miniature air pump. The power conversion function provided by the motherboard is a conventional choice for those skilled in the art. For example, a DC-DC synchronous buck chip can be selected (such as TITPS563200, ADILT8614, or equivalent buck chips with high current output capability). Its input voltage range is compatible with the standard 5V output of mobile phones / power banks, and the output voltage is adjusted by the chip to meet the rated voltage requirements of the micro motor, such as 3.0~3.78V. Alternatively, a current adaptive drive circuit can be selected, consisting of an NMOS power transistor (such as IRF7805), a sampling resistor (0.05Ω / 2W alloy resistor), and a feedback control unit. It can dynamically adjust the output current according to the load changes of the impeller 9 (high load in the early stage of inflation and low load in the later stage), with a maximum output current of up to 6A, matching the motor's operating current range of 1~6A. Alternatively, a protection circuit module can be added, integrating overvoltage protection (such as threshold setting of 4.5V), overcurrent protection (such as threshold setting of 6.5A), and overheat protection (such as threshold setting of 85℃). When the power supply voltage is abnormal, the motor is stuck, or the motherboard temperature is too high, the circuit automatically cuts off the output to avoid damage to the components. The circuit connections described above are as follows: Power interface 41 is connected to the Vin pin of the DC-DC step-down chip via a wire; the chip's Vout pin is connected to the power supply terminal of the micro motor 7 via a current drive circuit and a filter unit; a sampling resistor is connected in series in the motor power supply circuit, and its voltage signal is fed back to the chip's CurrentSense pin to achieve current closed-loop control; the protection circuit module is linked with the chip's Enable pin to complete power-off protection under abnormal conditions. Those skilled in the art can implement corresponding functions on the motherboard according to the needs of the micro motor. Achieving precise matching between the mobile phone / power bank output and the motor power supply parameters requires no creative effort and will not be elaborated upon here.

[0093] This embodiment solves the main problems of existing inflation solutions for small inflatable products (manual inflation, external / manual pumps, built-in battery pumps, and press-to-inflate bladder structures) as follows:

[0094] 1. Compared to manual inflation, it completely eliminates hygiene concerns and significantly improves inflation efficiency.

[0095] In existing technologies, manual inflation is a common and simple method for small inflatable products, but it has two major drawbacks: First, the airflow directly carries saliva into the product, easily breeding bacteria and causing cross-contamination, posing a serious hygiene hazard; second, manual inflation results in insufficient pressure, poor airflow continuity, long inflation time (usually 3-5 minutes), and difficulty in achieving the desired fullness. This invention utilizes a closed-loop clean airflow design of "air intake chamber - impeller chamber - inflation channel," eliminating human contact throughout the entire process and fundamentally preventing saliva contamination, ensuring hygiene, and increasing inflation efficiency by more than 5 times compared to manual inflation, thus solving the pain points of manual inflation being "dirty and slow."

[0096] 2. Compared to external air pumps / manual pumps, it eliminates carrying redundancy and achieves ultimate portability.

[0097] Existing external air pumps (including electric and manual models) generally suffer from functional redundancy and large size (conventional manual pumps are ≥10cm in length, and electric models weigh ≥200g) to adapt to various inflation scenarios. They require additional storage space when carried, which contradicts the "lightweight use" requirement of small inflatable products (lumbar supports, neck pillows, etc.). Manual pumps also require continuous manual pressing / pulling, which is cumbersome and laborious. This invention adopts a "battery-free" minimalist design, eliminating the redundant functional modules of external air pumps and retaining only the core inflation component. It can be directly connected to a mobile phone or power bank for power supply via a universal power interface such as Type-C (no need to carry an additional power supply device). It adopts a cylindrical integrated layout (total length 46.5mm, diameter 34.2mm), which can be completely embedded inside a small inflatable product. There is no need to carry it separately. When in use, it can automatically inflate by simply connecting to a power source. This solves the defects of external air pumps in terms of "cumbersome carrying and laborious operation", and achieves a portable experience of "product and inflation device integration".

[0098] 3. Compared to built-in battery air pumps, this overcomes size and weight limitations, making it suitable for installation in small products.

[0099] Existing built-in battery air pumps require integrated battery and charging management modules for independent power supply, resulting in a bulky and heavy overall size. When embedded in small inflatable products, they become cumbersome and heavy, and may even be unsuitable for the internal installation space of thin products (such as thin neck pillows). Furthermore, battery modules are prone to aging and battery life reduction, easily leading to battery failure and rendering the small inflatable product unusable after prolonged use. This invention eliminates the independent battery module, utilizing readily available mobile phones and power banks as power sources. This saves over 20% of the volume occupied by the battery and charging management module, significantly reducing the weight of the air pump. It can be easily embedded into the internal cavity of various small and thin inflatable products, without battery aging issues, resulting in a longer lifespan. This solves the pain points of built-in battery air pumps—large size, heavy weight, and prone to battery aging—perfectly meeting the lightweight design requirements of small inflatable products.

[0100] 4. Compared to the press-type air bladder inflation structure, it optimizes the appearance and improves user comfort.

[0101] Existing press-type airbag inflation structures require an independent airbag on the product surface. This airbag protrudes from the main airbag surface, disrupting the overall aesthetic design and creating an "abrupt" bulge. It also causes localized pressure during use (e.g., when a neck pillow is pressed against the neck, or a lumbar support against the waist), affecting comfort. Furthermore, repeated pressing of the airbag can lead to seal failure and elasticity loss, resulting in decreased inflation efficiency. This invention employs an embedded elastic pressure ring seal design, completely concealing the air pump body inside the product. Only a tiny air intake chamber (the bulge is about the thickness of two coins) is exposed, barely affecting the product's surface flatness and visually blending seamlessly with the product. This solves the problems of "abrupt appearance and oppressive use" associated with press-type airbags. Simultaneously, inflation is driven by a motor, eliminating the need for manual pressing, making operation more convenient. Moreover, the durability of the sealing structure (rebound pad) is far superior to the elastic material of the airbag, making it less prone to failure over long-term use.

[0102] 5. Compared to existing inflation methods, this enhances structural stability and sealing pressure retention, thereby improving product reliability.

[0103] Existing inflation methods generally suffer from structural or sealing defects: external air pumps with plug-in inflation interfaces are prone to leakage, manual pump gaskets are easily worn, and the elastic materials of press-type air bladders are prone to aging. Internal battery-powered air pumps, due to their numerous components, are prone to assembly loosening, leading to unstable airflow during inflation and leakage after inflation stops (typically a pressure drop of ≥10% within 24 hours). This invention utilizes a three-dimensional positioning structure of "one main, two internal auxiliary, and two external auxiliary" (with precise nesting and fixing of components such as the motor, mainboard, and outer casing) to ensure no relative displacement of the motor during operation and stable airflow output. Simultaneously, it innovates a "push-open during inflation / re-block when inflation stops" spring pad sealing structure. During inflation, air pressure automatically pushes open the spring pad; after inflation stops, the spring pad uses its own elasticity to block the air passage. Furthermore, the internal air pressure pushes the spring pad back to strengthen the seal, resulting in a pressure-holding effect far exceeding existing inflation methods. This solves the core defects of existing technologies—"unstable inflation and easy leakage"—and improves the reliability of small inflatable products.

[0104] This embodiment also solves other problems besides those in the prior art:

[0105] Small inflatable products, after inflation, have limited fabric rigidity. Due to varying individual usage habits, it's difficult to ensure the miniature air pump is properly positioned within the inflatable product (where stress is most evenly distributed within the embedded part, i.e., the outer ring). This is especially true when the pump is tilted or at an angle. If the built-in air pump is heavy, large, or long, it can cause tilting, affecting the surface flatness of the inflatable product. Long-term stress concentration from the pump in an off-center position can also potentially tear the fabric around areas subjected to high-temperature heat pressing or high-frequency voltage. Example 1 ensures the miniature air pump is lightweight, small, and short, embedded within the inflatable product. Even in off-center conditions, the miniature air pump exhibits no significant tilting during normal use after inflation, having minimal impact on the product's flatness.

[0106] The following technical effects were achieved in this embodiment.

[0107] 1. Lightweight and compact design breaks through the limitations of traditional structures

[0108] Battery-free design: Eliminating the need for a separate battery module, the system utilizes the universal power supply of mobile phones / power banks, reducing the volume occupied by batteries, which typically account for over 20% of the volume. A "cylindrical integrated" layout is adopted, with all components layered and plugged in along the central axis, eliminating redundant protruding structures. The entire miniature air pump is designed to be as short as possible around the total length of the miniature motor, which is 20mm ± 0.3mm in length. The total length of the miniature air pump is 46.5mm, and the main body diameter is 34.2mm, meeting the lightweight, small, and short requirements of small inflatable products.

[0109] Each component is precisely fitted together: the motor compartment 65 at the bottom of the impeller lower compartment 611 is equipped with a micro motor 7. The bottom of the micro motor 7 is inserted into the centrally located motor slot 511. A pair of first auxiliary columns 67 surrounding the motor compartment 65 are inserted into the first auxiliary column slots 512 on both sides of the motor lock seat 5 and screwed together to form a "one main and two inner auxiliary" structure. A pair of second auxiliary columns 68 surrounding the motor compartment 65 are screwed together to the main board 4 to form "two outer auxiliary" structures. The positioning structure of "one main, two inner auxiliary, and two outer auxiliary" ensures that the main board 4, motor lock seat 5, micro motor 7, and motor socket 6 are precisely fitted together to form a three-dimensional fixed frame for the internal main body of the micro air pump. The internal main body is slidably inserted into the guide rail 87 of the outer cover 8 through the guide groove 69 of the motor socket 6 to form an inner and outer nested structure, effectively eliminating the gap between the inner and outer assembly. The outer cover 8 is fixed to the other side of the elastic pressure ring 2. The air intake compartment 3 is tightly inserted from the inner ring 21 and then inserted into the outer cover 8, or the air intake compartment 3 is glued to the inner ring 21 and then inserted into the outer cover 8. The motor socket 6 is separated from the impeller lower chamber 611 by the first air vent plate 61, and the outer cover 8 is separated from the impeller upper chamber 84 by the second air vent plate 82. The guide groove 69 of the motor socket 6 and the guide rail 87 of the outer cover 8 slide and insert to form an inner and outer nested structure, effectively eliminating the gap between the inner and outer assembly. The impeller lower chamber 611 and the impeller upper chamber 84 enclose each other to form the impeller chamber, which houses the impeller 9. The rebound pad 10 is detachably and sealed to the rebound pad chamber 83. The entire miniature air pump is modularly and precisely assembled, improving integration and further reducing weight and volume.

[0110] 2. Stable performance even when not in the correct orientation

[0111] When small inflatable products are used in an off-center (side-suspended, angled) state, the miniature air pump, due to its light weight, small size, and short axial dimension, will not cause significant tilting due to the shift in the center of gravity. This has minimal impact on the flatness of the surface of the small inflatable product, avoiding the surface deformation problem caused by the tilting of traditional large-volume, heavy-weight built-in air pumps.

[0112] Because of its overall lightness, small size, and short length, the miniature air pump, when embedded, can evenly distribute the contact stress with the small inflatable product on the outer ring. Even in non-orthodox usage scenarios, there will be no localized stress concentration. This fundamentally avoids the risk of the surrounding fabric being torn at high temperature hot pressing or high frequency voltage, thus extending the overall service life of the small inflatable product and the built-in air pump.

[0113] Miniature air pumps are small and lightweight, making them better compatible with the flexible fabrics of small inflatable products. Even when not in the correct position, they can conform to the fabric with slight deformation, without causing local pressure or jamming, thus ensuring user comfort.

[0114] 3. Aesthetics Guaranteed

[0115] The sealed embedded design of the elastic pressure ring 2 allows the air pump body 1 to be completely hidden inside the small inflatable product, with only the air intake chamber 3 exposed, which is a tiny circular protrusion about the thickness of two coins. Compared to the large area occupied by the press-type air bladder, the exposed part of this air intake chamber 3 is only equivalent to occupying the inflation nozzle position of a conventional inflatable product, forming a seamless visual effect with the small inflatable product. The cylindrical contour adapts to the internal cavity curve of most small inflatable products, and the sealed assembly avoids the "stitch-like" large area protrusion of the traditional press-type air bladder, completely solving the pain point of poor appearance.

[0116] 4. Convenient power supply and inflation

[0117] The power interface 41 is compatible with universal data cables for mobile phones and power banks. If a mobile phone is an essential item for frequent users, you only need to carry one data cable to connect to the power interface for power charging. If a power bank is an essential item for long-distance travel, you can directly use the data cable that comes with the power bank to connect to the power interface for power charging.

[0118] 5. Improved hygiene

[0119] Airflow enters the first air guide hole 64 from the external air intake hole of the air intake chamber 3, and after being pressurized by the impeller chamber, it is injected into the interior of the inflatable product through the second air guide hole 85, completely eliminating the problem of saliva contamination from manual blowing.

[0120] 6. Improved airtightness and leak-proof performance

[0121] The rebound pad chamber 83 and the rebound pad 10 work together to form an "inflation push-open / inflation stop-block" switching mechanism. When inflating, the air pressure pushes the rebound pad 10, which in turn pushes the snap-back soft rubber column 101 to separate the rebound pad 10 from the rebound pad chamber 83. The airflow enters the small inflatable product from the gap between the rebound pad chamber 83 and the rebound pad 10 for inflation. When inflation stops, the air pressure is released, and the snap-back soft rubber column 101 pulls back the rebound pad 10 to block and seal the rebound pad chamber 83. After full inflation, the internal air pressure of the small inflatable product pushes the rebound pad 10 back, and the snap-back soft rubber column 101 exerts force in the same direction to further ensure the sealing of the rebound pad 10 and ensure the long-term inflation effect of the small inflatable product.

[0122] 7. Improve the connection strength and sealing of the air intake compartment.

[0123] The air intake 3 is tightly inserted into the inner ring 21 and then the outer cover 8 is inserted. The elastic compression and adhesion of the inner ring 2 to the air intake 3 ensure the connection firmness of the air intake 3 and the air intake channel sealing. Alternatively, the air intake 3 is glued to the inner ring 21 and then the outer cover 8 is inserted. The elastic compression and adhesion of the inner ring 2 to the air intake 3 ensure the connection firmness of the air intake 3 and the air intake channel sealing.

[0124] Example 2

[0125] This embodiment is based on the core structure of embodiment 1, and exemplarily shows the connection structure between the outer cover 8, the air intake 3, and the elastic pressure ring 2.

[0126] like Figure 1-8 as well as Figure 14-15 As shown, the inner wall of the bottom of the outer cover 8 has a snap-fit ​​ring groove 881, and the outer wall of the bottom is fitted with an outer ring 882. The snap-fit ​​ring opening 34 at the end of the air intake 3 forms an "annular engagement" with the snap-fit ​​ring groove 881. The part of the bottom of the outer cover 8 that extends out of the outer ring 882, the snap-fit ​​ring groove 881 and the outer ring 88 together form an annular sleeve 89. The outer cover 8 is connected to the elastic pressure ring 2 through the annular sleeve 89.

[0127] In this embodiment, the annular retainer 89 adopts a "structural reuse" design, utilizing the original contours of the outer cover 8 and the air inlet 3 to form a connecting carrier. No additional fasteners, such as screws or clips, are needed. While improving connection strength, only one outer ring 882 is added, increasing weight by no more than 2g, thus meeting the lightweight and compact requirements of the miniature air pump as much as possible. The annular engagement area between the retaining ring groove 881 and the retaining ring opening 34 is more than three times that of traditional point-fitting connections, increasing connection strength by more than 150%, without occupying additional internal space. The outer ring 882 of the elastic pressure ring 2 ensures the compatibility of the miniature air pump with embedded small inflatable products. The annular retainer 89 forms a regular annular sealing band between the outer cover 8 and the elastic pressure ring 2, avoiding local bulges or depressions caused by connection deviations, ensuring a good fit between the air pump and the product's interior after embedding, without affecting the product's external contours. The "plug-and-lock" design of the ring sleeve 89 allows the assembly of the outer cover 8 with the air intake 3 and the elastic pressure ring 2 to be completed without calibration, and only axial pressing is required to complete the positioning and fixation, improving the assembly efficiency by 60%.

[0128] Example 3

[0129] Based on the structure of Embodiment 2, this embodiment optimizes the balance between structural strength and lightweight of the outer cover 8.

[0130] like Figure 14-15 As shown, the outer cover 8 is made of hard plastic shell, such as PC+ABS composite material, and its outer ring 882 has a number of reinforcing holes 8821 arranged in a circumferential pattern, such as holes with a diameter of 2-4mm.

[0131] In this embodiment, a precise balance between weight reduction and strength is achieved. The reinforcing hole 8821 adopts a "hollowed-out reinforcement" design, which reduces the material usage of the outer ring 882 without compromising structural strength, resulting in a 5-10% weight reduction for the outer casing 8. Simultaneously, the evenly distributed holes around the circumference disperse stress, increasing deformation resistance by 30%, perfectly meeting the design requirements of "lightweight yet strong." The hard plastic shell itself possesses high strength and aging resistance. Combined with the stress-dispersing design of the reinforcing hole 8821, it avoids the easy deformation problem of the soft plastic shell and improves the weight redundancy of the solid hard plastic. The reinforcing hole 8821 is integrally molded, with smooth, burr-free hole walls. The surface of the outer ring 882 is flat, and there are no obvious splicing marks after connecting with the elastic pressure ring 2, preserving the overall visual uniformity of the air pump and adapting to the refined requirements of small inflatable products. The reinforcing hole 8821 provides a "mechanical engagement point" for subsequent connection with the elastic pressure ring 2. Whether it is injection molding fixation or snap-fit ​​fixation, precise positioning can be achieved through the hole, reducing assembly difficulty, while improving connection firmness and reducing the risk of loosening during use.

[0132] Example 4

[0133] Based on the structure of Embodiment 3, this embodiment provides a connection method between one set of elastic pressure rings and the outer ring.

[0134] like Figure 1-3 as well as Figure 14-15 As shown, the elastic pressure ring 2 is made of soft rubber, such as TPU soft rubber, and is integrally molded into the annular sleeve 89 by injection molding. After injection molding, its inner ring 21 extends to form a convex ring 22. The convex ring 22 partially wraps the outer ring 88 and completely fills the reinforcing hole 8821, forming a "covering + filling" double fixing structure.

[0135] In this embodiment, the flexible connection is free of redundancy. The soft rubber injection molding process integrates the elastic pressure ring 2 and the annular sleeve 89 into a single structure. The semi-enclosed design of the convex ring 22 eliminates the need for additional fasteners. While filling the reinforcing hole 8821, it does not increase the overall thickness, maintaining the compact size of the air pump and perfectly fitting the internal flexible space of the soft inflatable product. The density of TPU soft rubber is only 0.8 times that of hard rubber, further reducing the overall weight while ensuring connection strength. The integrated injection molding allows the elastic pressure ring 2 and the outer cover 8 to connect seamlessly. The outer ring 88 is hidden within the convex ring 22, with no visible connection marks on the outside. After the air pump is embedded, the material transition between it and the soft inflatable product is natural, completely avoiding the abruptness caused by a "hard connection". The elastic properties of the soft rubber can buffer assembly errors. Even if there is slight deformation inside the inflatable product, the flexible fit of the convex ring 22 can maintain a flat sealing surface without wrinkles or protrusions, ensuring the aesthetic appearance of the product. The "covering + filling" double fixing structure has a connection strength that is 5 times that of traditional bonding, eliminates the risk of delamination, and extends the service life. The flexible connection of the soft rubber body allows the air pump and the product body to deform synchronously when the inflatable product is folded or squeezed, without producing jamming or abnormal noise, resulting in a smoother user experience.

[0136] Example 5

[0137] Based on the structure of Embodiment 3, this embodiment provides another way of connecting the elastic pressure ring and the outer ring.

[0138] Not shown in the figure, the elastic pressure ring 2 is made of hard plastic, such as PA+glass fiber reinforced material. The side of it connected to the outer cover 8 is provided with several locking posts. The number of locking posts is perfectly matched with the reinforcing hole 8821. During assembly, the locking posts are precisely inserted into the reinforcing hole 8821 to form a rigid lock.

[0139] In this embodiment, the rigid connection adds no weight. The "plug-in locking" design of the locking post and reinforcing hole 8821 eliminates the need for additional screws, clips, or other fasteners. The high strength of the rigid plastic material itself makes the connection structure compact, without increasing the radial or axial dimensions of the air pump, maintaining an overall lightweight and compact form. The weight of the PA+glass fiber reinforced material is close to that of the rigid plastic outer cover 8, and the rigid plastic elastic pressure ring 2 does not affect the high-temperature hot pressing or high-frequency voltage embedding compatibility of the air pump. The rigid fit is deformation-free. The rigid plastic elastic pressure ring 2 is rigidly matched to the material of the rigid inflatable product, resulting in a smooth, un-dented connection surface after assembly. After the air pump is embedded, it forms a stable support with the internal structure of the product, preventing localized deformation caused by flexible connections and ensuring the regularity of the product's external contour. The locking post and reinforcing hole 8821 precisely match, with a completely flush connection surface, without steps or gaps, ensuring the aesthetic appeal of the product from the inside out. This is especially suitable for rigid inflatable products with high requirements for surface flatness, such as the pet seat described in the background art. The quick-assembly and disassembly mechanism of the locking pin allows for easy assembly of the elastic pressure ring 2 and the outer cover 8 with only axial pressing. Disassembly is achieved by gently pushing the locking pin with a tool. Compared to screw fixing and injection molding, this design facilitates the assembly of the air pump. The rigid plastic body exhibits strong morphological stability, preventing deformation or breakage during long-term use and ensuring high connection reliability.

[0140] Example 6

[0141] Based on the core structure of Embodiment 1, this embodiment improves the connection accuracy and stability between the motherboard and the motor lock seat and motor socket.

[0142] like Figure 9-13 As shown, the main board 4 has second locking holes 42 on both sides, the motor lock seat 5 has a first locking hole 53 in the first auxiliary column groove 512, and screw holes are machined at one end of the first auxiliary column 67 and the second auxiliary column 68 respectively. The first auxiliary column 67 is rigidly screwed to the first locking hole 53 and the second auxiliary column 68 is fixed to the second locking hole 42 by screws.

[0143] In this embodiment, rigid fixing eliminates volume redundancy. A composite fixing structure of "screw connection + plug connection" is adopted. Screw connections eliminate gaps in plug connections, ensuring a tight fit between components and further compressing internal space to guarantee the extremely small size of the air pump. The first auxiliary column 67 and the second auxiliary column 68 themselves serve both positioning and fixing functions, eliminating the need for additional fixing brackets and achieving "multi-purpose use of one column." This reduces the number of parts, resulting in both weight and volume reduction, conforming to the core principles of miniaturization design. The structure is stable and deformation-resistant; the screw connection fixation forms a rigid whole with no relative displacement during motor operation. The improved precise coaxiality between the micro motor 7 and the impeller 9 ensures stable airflow output.

[0144] Example 7

[0145] Based on the structure of Embodiment 1, this embodiment optimizes the positioning accuracy and weight reduction of the motor socket 6.

[0146] like Figure 3-5 as well as Figure 12-13 As shown, the motor socket 6 has several hollowed-out slots 62 on its side wall, and adjacent hollowed-out slots 62 form pins 66. The pins 66 are divided into a first pin 661 that reaches the main board 4 and a second pin 662 that reaches the air intake 3. A first auxiliary post 67 is located between the first pin 661 and the motor compartment 65, and a second auxiliary post 68 is located inside the second pin 662. A guide groove 69 is machined on the outer wall of the first pin 661.

[0147] In this embodiment, a core breakthrough in miniaturization was achieved through hollowing out for weight reduction and space optimization. The hollowed-out slot 62 adopts a design of "retaining functional areas and hollowing out redundant areas," reducing the material usage of the motor socket 6 by more than 30% and the weight by more than 30% while ensuring the positioning function of the pin 66. At the same time, the hollowed-out structure optimizes the internal airflow space. The "two-point positioning" of the pin 66 (the first pin 661 abutting the main board 4 and the second pin 662 abutting the air intake 3) improves the positioning accuracy of the motor socket 6 to 0.03mm, reducing weight without compromising structural stability, perfectly meeting the requirements of miniaturization design. The lightweight and precise positioning of the motor socket 6 results in a neat internal structure of the air pump, without cluttered protruding parts, and a more uniform cylindrical contour of the air pump body 1. The "dual positioning" of the first pin 661 and the second pin 662 eliminates the need for repeated calibration during assembly of the motor socket 6, and the precise fit between the guide groove 69 and the guide rail 87 of the outer cover 8 enables "slide-in" assembly.

[0148] Example 8

[0149] Based on the structure of Embodiment 7, this embodiment optimizes the airflow channel, positioning structure, and assembly stability.

[0150] like Figure 1-15 As shown, the air intake 3 has circumferentially arranged air intake holes 33 on the outer edge of the bottom of the air intake compartment 3; the motor lock seat 5 adopts a lip-shaped long-life lock housing structure, and the assembly slot 51 has a wire hole 52. The central motor slot 511 has a two-sided sandwich structure, and the first auxiliary column slots 512 on both sides have a semi-enclosed structure; the first air passage plate 61 has a motor output port 63 in the center, and the side wall is fitted with a first air guide hole 64 corresponding to the hollow slot 62; the second air passage plate 82 has a number of second air guide holes 85 evenly distributed.

[0151] This embodiment balances miniaturization and efficiency. The design eliminates redundant airflow, and the circumferentially arranged air inlets 33 enhance air intake efficiency while dispersing the airflow direction, avoiding concentrated airflow resistance from single-hole intakes. The lip-shaped long-life lock structure motor lock seat 5, while ensuring structural strength, employs a "semi-clamping + semi-enclosed" design, reducing material usage by over 35%. The first air guide hole 64 corresponds to the hollowed-out groove 62, and the second air guide holes 85 are evenly distributed, forming a highly efficient airflow channel of "dispersed air intake - concentrated pressurization - uniform air output," improving inflation efficiency. The lip-shaped long-life lock structure motor lock seat 5 has high strength and strong vibration resistance, effectively restraining the operational vibration of the micro motor 7 and preventing displacement of the entire inflation pump due to vibration. The "two-sided clamping + semi-enclosed" structure of the motor lock seat 5 provides a more secure fixation for the micro motor 7 and the first auxiliary column 67, reducing vibration amplitude, noise, and user comfort.

[0152] Example 9

[0153] Based on the structure of Embodiment 1, this embodiment focuses on the selection of micro motors.

[0154] like Figure 3-5 As shown, the micro motor 7 is a coreless motor, and the motor output terminal 71 directly drives the impeller 9. The rated voltage of the micro motor 7 is 3.2~3.78V and the total length is 20±0.3mm.

[0155] If you choose a hollow cup motor from the following manufacturers:

[0156] 1. Shenzhen Constarmotor Technology Co., Ltd.

[0157] L0820N5M / 820 series: Diameter 8mm, length 20±0.3mm, voltage 3.2V / 3.4V, no-load speed 38000~46000rpm, weight 4.2g;

[0158] Alternatively, the L8.520N5M / 8520 series: diameter 8.5mm, length 20±0.3mm, voltage 3.0V / 3.4V, no-load speed 37500rpm, weight 4.2~5.2g.

[0159] 2. Shenzhen Wanzhida Motor Manufacturing Co., Ltd. (WZD)

[0160] OT-CM0720: Diameter 7mm, Length 20±0.3mm, Voltage 3.78V, No-load speed 31921rpm, Weight 2.5g;

[0161] Or the W08520 series: length 20±0.3mm, voltage 3.7V, no-load speed 20800rpm, weight 2~2.5g.

[0162] In this embodiment, the total length of the ultra-miniature hollow cup motor is only 20mm ± 0.3mm, significantly shorter than that of a traditional DC motor. Its diameter can be controlled within 10mm, reducing the axial dimension of the air pump to 46.5mm, providing core support for overall miniaturization. If the WZD W08520 series is selected, the motor weight is only 2-2.5g, further reducing weight and capacity. The coreless design of the hollow cup motor reduces power consumption by more than 30%, perfectly aligning with the battery-free and miniaturized design philosophy when powered by a mobile phone / power bank. The ultra-miniaturization of the motor allows for a slimmer cylindrical structure of the air pump body 1, reducing its footprint when embedded in small inflatable products, making it particularly suitable for small, close-fitting inflatable products such as neck pillows and headrests.

[0163] Example 10

[0164] Based on the structure of Embodiment 1, this embodiment optimizes the versatility of the power supply interface.

[0165] Power interface 41 includes Lightning (not shown in the figure), USB-C (not shown in the figure), and so on. Figure 1 The three mainstream USB Type-C interfaces shown can be directly connected to mobile phones or power banks via corresponding data cables. The interfaces are precisely aligned with the power interface positioning hole 31 of the air intake 3.

[0166] In this embodiment, the interface is integrated without redundancy. The three mainstream interfaces adopt a modular design, with the interface body integrated into the motherboard 4. The interface adapts to the air intake 3 and corresponds to the power interface positioning hole 31, without increasing the radial dimension of the air pump. No additional interface adapters are needed, avoiding the carrying of redundant accessories and meeting the requirements of miniaturization and portability. The power interface 41 precisely fits the power interface positioning hole 31 of the air intake 3, with the interface end face flush with the surface of the air intake 3, without protrusions or depressions. After the air pump is embedded, the exposed interface area is flat and smooth, without compromising the overall aesthetics of the product, and adapts to the appearance design of various small inflatable products. It covers 99% of the interface types of smartphones and power banks on the market. If powered by a mobile phone, users only need to carry a data cable with the corresponding interface type. If a small inflatable product with a USB Type-C interface is purchased, only a data cable with dual USB Type-C interfaces needs to be carried. If powered by a power bank, there is no need to carry a separate data cable; plug and charge for greater convenience and speed.

[0167] Example 11

[0168] This embodiment is based on the core structure of embodiment 1, and specifically optimizes the molding accuracy and sealing stability of the impeller chamber to achieve precise fitting of the impeller chamber and high efficiency of airflow pressurization.

[0169] like Figure 3 , Figure 13-14As shown, the outer cover 8 has a constricted section 81, and the constricted section 81 is integrally formed with the second air passage plate 82. The outer wall of the impeller lower chamber 611 has a misaligned opening 6111 that matches the contour of the constricted section 81. When the motor socket 6 and the outer cover 8 are nested together, the misaligned opening 6111 of the impeller lower chamber 611 can be misaligned and engaged with the constricted opening 811 on the inner wall of the constricted section 81. After the two are enclosed, a precisely sized impeller chamber is formed, and the impeller 9 can run at high speed without interference inside the chamber.

[0170] In this embodiment, the reduced-width section 81 further reduces the material and weight of the outer casing. Precise fitting without offset: the misaligned engagement of the staggered joint 6111 and the reduced-width section 811 forms a dual constraint of "axial limiting + radial locking," controlling the impeller chamber's forming tolerance within 0.02mm. The uniformity of the gap between the impeller 9 and the chamber wall is increased to over 95%, completely eliminating the risk of scraping during impeller operation and ensuring the stability of the motor drive. The interlocking surface of the misaligned engagement has a stepped structure, increasing the sealing contact area by 200% compared to traditional planar butt joints. Combined with the self-tightening effect of the airflow pressure inside the chamber, it effectively blocks airflow leakage from the joint, increasing the impeller chamber's air pressure utilization rate by 18% and further improving inflation efficiency. The contours of the staggered joint 6111 and the reduced-width section 811 are complementary. During assembly, only axial pushing of the motor socket 6 and the outer casing 8 is required to achieve automatic alignment and engagement, eliminating the need for additional calibration fixtures. The constricted section 81 serves as both the load-bearing component of the second air passage plate 82 and the forming function of the impeller compartment. There is no need to set up an additional independent enclosure component for the impeller compartment. While ensuring structural strength, the number of parts is reduced, and the overall weight of the outer cover 8 is reduced by another 3%, which fits the core of the miniaturization design.

[0171] Example 12

[0172] This embodiment, based on the pin positioning structure of embodiment 7, further improves the connection accuracy and assembly stability between the motherboard 4 and the motor socket 6, achieving precise locking of the motherboard and reliable circuit connection.

[0173] like Figure 9 , Figure 12 As shown, the outer wall of the motherboard 4 is pre-molded with a limiting opening 43. In the pair of second pins 662 of the motor socket 6, the inner wall of one of the second pins 662 is machined with a limiting strip 6621 that matches the limiting opening 43. When the motor socket 6 and the motherboard 4 are assembled, the limiting strip 6621 can be embedded in the limiting opening 43 to form a precise limit. At the same time, the pair of second pins 662 can lock and fix the motherboard 4 from both sides, so that the motherboard 4 and the motor socket 6 have no relative displacement.

[0174] In this embodiment, the engagement of the limiting strip 6621 and the limiting port 43 achieves "precise positioning," while the snap-fit ​​of the second pin 662 achieves "overall locking." Combined with the screw connection of the second auxiliary post 68, a triple fixing structure of "positioning + snap-fit ​​+ screw connection" is formed. The assembly offset of the motherboard 4 is controlled within 0.01mm, completely eliminating circuit contact failures caused by motherboard displacement. The snap-fit ​​fixing of the motherboard 4 can disperse the stress generated by the screw connection, preventing the solder joints from cracking due to localized stress. The pre-positioning function of the limiting strip 6621 and the limiting port 43 allows the motherboard 4 to be precisely aligned directly without repeated adjustments during assembly. Only the screw connection of the second auxiliary post 68 needs to be completed subsequently, improving overall assembly efficiency. The limiting strip 6621 and the second pin 662 are integrally formed structures, and the limiting port 43 is a side wall groove of the motherboard 4. No additional fixing brackets or positioning parts are needed, and the internal space of the micro air pump is not occupied, maintaining the overall compact cylindrical layout.

[0175] Example 13

[0176] This embodiment is based on the modular power supply interface structure of Embodiment 1, and adds a visualization function for the working status of the air pump, thereby improving the convenience and safety of user operation.

[0177] like Figure 1-9 As shown, the motherboard 4 also integrates a status light 44, which can display different lights according to the working status of the air pump (such as green light when working, light off when power is off, and red light when there is an abnormality). A status light positioning hole 32 is opened at the corresponding position of the air intake 3, and the status light 44 can be embedded in the positioning hole 32. Its light surface is flush with the surface of the air intake 3, so as to realize the external visualization of the working status.

[0178] In this embodiment, the visual design of the status light 44 allows users to intuitively grasp the working status of the air pump, eliminating the need for frequent pressing of the small inflatable product to judge the inflation level. This improves ease of use and avoids product damage due to over-inflation, meeting the operational needs of ordinary users. When the air pump experiences power supply abnormalities, motor jamming, or other malfunctions, the status light 44 automatically switches to a warning red light, reminding the user to disconnect the power supply in time. This prevents safety hazards such as motherboard burnout and motor damage caused by continuous abnormal operation, improving product safety. The status light 44 is directly integrated into the motherboard 4. The status light positioning hole 32 and the power interface positioning hole 31 are integrated openings in the air intake chamber 3, eliminating the need for additional redundant components such as lamp holders and light guides. This does not increase the size and weight of the air pump, maintaining a compact design. The status light and power interface form a neat functional area, preserving the overall aesthetic design of the small inflatable product and achieving a unity of functionality and aesthetics.

[0179] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A miniature air pump built into a small inflatable product, characterized in that, It includes a cylindrical air pump body (1), an elastic pressure ring (2), and an air intake chamber (3). The air pump body (1) includes a main board (4) with a power interface (41), a motor lock seat (5), a motor socket (6), a micro motor (7), an impeller (9), an outer cover (8) connected to the elastic pressure ring (2), and a rebound pad (10); The motor lock seat (5) is connected to a motor socket (6), the motor socket (6) is connected to an outer cover (8), and the outer cover (8) is connected to a spring pad (10); The motor lock seat (5) has a wire hole (52), and also includes a motor slot (511) in the center that communicates with the wire hole (52) and first auxiliary column slots (512) on both sides; The motor socket (6) is separated from the impeller lower chamber (611) by a first air passage plate (61) having a first air guide hole (64); the outer cover (8) is separated from the impeller upper chamber (84) by a second air passage plate (82) having a second air guide hole (85); the space defined by the impeller lower chamber (611) and the impeller upper chamber (84) after the motor socket (6) is inserted into the outer cover (8) forms the impeller compartment, and the impeller compartment is provided with an impeller (9); At the bottom of the impeller lower compartment (611), a motor compartment (65) for mounting a micro motor (7) is provided in the center. A pair of first auxiliary columns (67) and a pair of second auxiliary columns (68) are arranged opposite to each other around the motor compartment (65). The bottom of the micro motor (7) is inserted into the motor slot (511), the first auxiliary column (67) is inserted into the first auxiliary column slot (512) and screwed to the motor lock seat (5), and the second auxiliary column (68) is screwed to the main board (4). The outer wall of the motor socket (6) has several guide grooves (69), and the outer cover (8) has several guide rails (87) that match the guide grooves (69). The motor socket (6) is inserted into the guide rails (87) of the outer cover (8) through the guide grooves (69). The main board (4) is electrically connected to a micro motor (7) by wires leading out from the wire hole (52). The motor output end (71) extends out of the first air passage plate (61) and connects to the impeller (9). The second air passage plate (82) has an insertion hole (86) in the center. The rebound pad (10) is an elastic pad. The rebound pad (10) has a snap-back soft rubber post (101) in the middle that is compatible with the insertion hole (86). The rebound pad (10) is detachably and sealed to the rebound pad compartment (83) through the snap-back soft rubber post (101). The elastic pressure ring (2) is sealed and built into the inflatable product on one side and fixed to the outer cover (8) on the other side, and also includes an inner ring (21); The air inlet (3) with a power interface positioning hole (31) exposed on the inflatable product is inserted into the inner ring (21) and then the outer cover (8) is inserted. The power interface positioning hole (31) is set to correspond with the power interface (41). The power interface (41) connects to a mobile phone or power bank via a data cable to supply power to the micro motor (7).

2. The miniature air pump built into a small inflatable product as described in claim 1, characterized in that, The bottom inner wall of the outer cover (8) has a snap ring groove (881) for inserting into the air intake chamber (3), and an outer ring (882) is fitted on the bottom outer wall. The outer wall at the end of the air intake chamber (3) has a snap ring opening (34) that matches the snap ring groove (881). The part of the bottom of the outer cover (8) that extends out of the outer ring (882), the snap ring groove (881), and the outer ring (88) form an annular snap sleeve (89). The outer cover (8) is connected to the elastic pressure ring (2) through the annular snap sleeve (89).

3. The miniature air pump built into a small inflatable product as described in claim 2, characterized in that, The outer cover (8) is a hard plastic shell, and its outer ring (882) has a number of reinforcing holes (8821) arranged in a circumferential pattern.

4. The miniature air pump built into a small inflatable product as described in claim 3, characterized in that, The elastic pressure ring (2) is a soft gel. The elastic pressure ring (2) is injection molded into the annular sleeve (89). The elastic pressure ring (2) forms a convex ring (22) extending from the inner ring (21). The convex ring (22) partially encloses the outer ring (88) and fills the reinforcing hole (8821).

5. The miniature air pump built into a small inflatable product as described in claim 3, characterized in that, The elastic pressure ring (2) is a hard plastic material, and the other side of the elastic pressure ring (2) is provided with a number of locking posts that match the number of the reinforcing holes (8821).

6. The miniature air pump built into a small inflatable product as described in claim 1, characterized in that, The main board (4) also has second locking holes (42) on both sides corresponding to the second auxiliary post (68); The first auxiliary column groove (512) of the motor lock seat (5) has a first lock hole (53) corresponding to the first auxiliary column (67); One end of the first auxiliary post (67) and the second auxiliary post (68) is provided with screw holes corresponding to the first lock hole (53) and the second lock hole (42), respectively.

7. The miniature air pump built into a small inflatable product as described in claim 1, characterized in that, The motor socket (6) has several hollowed-out slots (62) on its side wall, and the side wall portions of adjacent hollowed-out slots (62) form pins (66); The pin (66) consists of a pair of first pins (661) that are oppositely arranged and directly connected to the main board (4) and a pair of second pins (662) that are oppositely arranged and directly connected to the air intake (3); The first auxiliary post (67) is located between the first pin (661) and the motor compartment (65), the second auxiliary post (68) is located inside the second pin (662), and the guide groove (69) is opened on the outer wall of the first pin (661).

8. The miniature air pump built into a small inflatable product as described in claim 7, characterized in that, The bottom outer edge of the air intake compartment (3) is provided with several air intake holes (33) arranged in a circle; The motor lock seat (5) is a lip-shaped long-life lock housing structure with an assembly groove (51) and the assembly groove (51) has the wire hole (52). The assembly slot (51) also includes the motor slot (511) which is centrally located and sandwiched between two sides, and the first auxiliary column slot (512) which is located on both sides and semi-enclosed. The first air passage plate (61) has a motor output port (63) for the motor output end (71) to extend out, and a first air guide hole (64) attached to the side wall of the first air passage plate (61) and corresponding to the hollow groove (62); The second air passage plate (82) is provided with a number of second air guide holes (85).

9. The miniature air pump built into a small inflatable product as described in claim 1, characterized in that, The micro motor (7) is a hollow cup motor with the motor output end (71); the total length of the hollow cup motor is 20mm ± 0.

3.

10. The miniature air pump built into a small inflatable product as described in claim 1, characterized in that, The power interface (41) includes any one of Lightning, USB-C, and USB Type-C power interfaces, and the power interface (41) is connected via any one of the Lightning, USB-C, and USB Type-C data cables.

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