Knob air pump

Abstract

The utility model aims to provide a knob sucking pump which comprises a pump shell, a knob and a sucking assembly, an air inlet is formed in the bottom of the pump shell, the pump shell is used for being installed in an inflatable product so that the air inlet can be communicated with the interior of the inflatable product, a volute channel is formed in the pump shell, the air inlet is located in the axial inner wall of the volute channel, and an air outlet is formed in the radial inner wall of the volute channel. The top of the pump shell is further provided with an air outlet, the air outlet is communicated with the exhaust outlet and used for being communicated with the outside, the knob is in threaded connection with the pump shell and used for sealing the air outlet, the air draft assembly comprises a motor and a fan wheel, the motor is arranged on the inner side wall, close to the volute channel, of the pump shell, and the fan wheel is arranged on an output shaft of the motor and located in the volute channel. Therefore, the structure is simple and compact, the air outlet is closed by screwing the pump shell through the knob, and the pump shell can be separated from the outside when not used, so that external sundries can be prevented from entering the pump shell from the air outlet.

Description

Technical Field

[0001] This utility model relates to the technical field of air pumps, and in particular to a knob-operated air pump. Background Technology

[0002] Inflatable products such as air mattresses, inflatable boats, and inflatable tents can only be properly stored after the air inside has been removed. Compared to manually pressing the air out of inflatable products, using an air pump can improve the efficiency of air removal.

[0003] Current air pumps mainly consist of a pump casing and a fan. The main types of fans are centrifugal fans, axial flow fans, mixed flow fans, and cross flow fans. By installing the fan inside the pump casing, the fan drives the gas to flow in a directional manner within the pump casing, allowing the air pump to quickly extract the gas from the inflated product.

[0004] However, current air pumps have the following shortcomings: Firstly, because commercially available fans have a fixed structure, a duct structure compatible with the fan needs to be designed inside the pump casing. This increases the overall duct length of the air pump, making the internal structure of the pump casing overly complex. Secondly, current air pumps are directly connected to the outside environment, making it difficult to effectively prevent debris from entering the pump casing when not in use. Therefore, to solve the above problems, the knob-type air pump of this application is proposed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a knob-type air pump with a simple and compact structure that can effectively protect the inside of the pump casing when not in use.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A rotary air pump, comprising:

[0008] The pump housing has an air inlet at its bottom and is installed inside an inflatable product to allow the air inlet to communicate with the interior of the inflatable product. A volute is provided inside the pump housing, with the air inlet located on the axial inner wall of the volute. An exhaust port is provided on the radial inner wall of the volute. An air outlet is also provided at the top of the pump housing, and the air outlet communicates with the exhaust port and is used to communicate with the outside.

[0009] A knob, which is screwed to the pump housing, is used to seal the air outlet; and

[0010] The exhaust assembly includes a motor and a fan wheel. The motor is disposed on the inner wall of the pump housing near the worm gear, and the fan wheel is disposed on the output shaft of the motor and is located inside the worm gear.

[0011] Optionally, the pump housing includes a housing, a top cover, and a bottom cover. The housing has a volute groove, and the bottom cover is disposed at the bottom of the housing so that the volute groove and the bottom cover together form the volute channel. The air inlet is located on the bottom cover, the top cover is disposed at the top of the housing, and the air outlet is located on the top cover.

[0012] Optionally, a screw head is provided on the side of the top cover away from the housing, the air outlet is located inside the screw head, and the knob is screwed to the screw head.

[0013] Optionally, a sealing ring is provided inside the knob, and when the knob is screwed with the screw head, the screw head and the knob together clamp the sealing ring.

[0014] Optionally, the bottom cover may also have a number of protrusions on the side away from the housing, with each of the protrusions distributed around the air inlet.

[0015] Optionally, a pump chamber is further provided inside the pump casing, and the exhaust port of the pump chamber is connected to the air outlet through the pump chamber, and the motor is located inside the pump chamber.

[0016] Optionally, a circuit board is also provided inside the pump chamber. The circuit board is electrically connected to the motor. A switch is also provided on the circuit board. One end of the switch passes through the air outlet to abut against the knob.

[0017] Optionally, a top block is provided on the inner bottom wall of the knob, so that when the knob is screwed with the screw head, the top block pushes the switch.

[0018] Optionally, a battery compartment is also provided inside the pump housing, and a battery is disposed inside the battery compartment and electrically connected to the circuit board.

[0019] Optionally, a soft rubber ring is provided on the outer side wall of the top cover.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] This utility model discloses a knob-type air pump, comprising a pump housing, a knob, and an air extraction assembly. The pump housing has an air inlet at its bottom and is installed inside an inflatable product to allow communication between the air inlet and the product's interior. A volute is formed within the pump housing, with the air inlet located on the axial inner wall of the volute. An exhaust port is formed on the radial inner wall of the volute. An air outlet is also formed at the top of the pump housing, communicating with the exhaust port and connecting to the outside environment. The knob is screwed to the pump housing and is used to seal the air outlet. The air extraction assembly includes a motor and a fan wheel. The motor is mounted on the inner wall of the pump housing near the volute, and the fan wheel is mounted on the motor's output shaft, located within the volute. This creates an air duct within the pump housing for gas flow. Compared to existing technologies that directly install commercially available fans, this pump housing has an independent air duct structure, eliminating the need for a commercially available fan to achieve the air extraction function. The structure is simple and compact. Furthermore, by installing a screw-on knob on the air outlet and tightening the knob to seal the air outlet, the pump casing can be isolated from the outside when not in use, thus preventing external debris from entering the pump casing through the air outlet. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a knob-type air pump according to one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the rotary air pump from another angle;

[0025] Figure 3 for Figure 1 A cross-sectional schematic diagram of the rotary air pump shown;

[0026] Figure 4 for Figure 1 The diagram shows the exploded structure of a knob-operated air pump.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Knob-operated air pump; 100. Pump housing; 200. Knob; 300. Exhaust assembly; 131. Air inlet; 111. Air outlet; 121. Air outlet; 310. Motor; 320. Fan wheel; 110. Housing; 120. Top cover; 130. Bottom cover; 112. Volute; 140. Screw head; 400. Sealing ring; 150. Protrusion; 330. Circuit board; 340. Switch; 210. Top block; 113. Battery compartment; 350. Battery; 160. Soft rubber ring. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0030] like Figure 1 and Figure 4 As shown, a rotary air pump 10 includes a pump housing 100, a knob 200, and an air extraction assembly 300. An air inlet 131 is provided at the bottom of the pump housing 100. The pump housing 100 is used to install inside an inflatable product so that the air inlet 131 communicates with the interior of the inflatable product. A volute is provided inside the pump housing 100, with the air inlet 131 located on the axial inner wall of the volute. An exhaust port 111 is provided on the radial inner wall of the volute. An exhaust port 111 is also provided at the top of the pump housing 100. There is an air outlet 121, which is connected to the exhaust port 111 and is used to connect with the outside. The knob 200 is screwed to the pump housing 100 and is used to seal the air outlet 121. The exhaust assembly 300 includes a motor 310 and a fan wheel 320. The motor 310 is located on the inner side wall of the pump housing 100 near the worm gear, and the fan wheel 320 is located on the output shaft of the motor 310 and is located inside the worm gear.

[0031] It should be noted that this application creates a volute within the pump housing 100, with the air inlet 131 positioned on the axial inner wall of the volute and the exhaust outlet 111 on the radial inner wall of the volute. This allows the motor 310 to drive the fan wheel 320 to rotate within the volute, thereby drawing gas from the inflatable product through the air inlet 131 into the volute, then through the exhaust outlet 111, and finally out through the outlet 121. In this way, a gas flow channel is formed within the pump housing 100. Compared to the prior art method of directly fixing and using a commercially available fan, the pump housing 100 forms an independent air flow channel structure, achieving the air extraction function without the need for a commercially available fan. The structure is simple and compact. Furthermore, by installing a screw-on knob 200 on the outlet 121 and tightening the pump housing 100 with the knob 200 to seal the outlet 121, the pump housing 100 can be isolated from the outside when not in use, thus preventing external debris from entering the pump housing 100 through the outlet 121.

[0032] like Figure 1 and Figure 4As shown, in one embodiment, the pump housing 100 includes a housing 110, a top cover 120, and a bottom cover 130. A volute 112 is provided on the housing 110, and the bottom cover 130 is disposed at the bottom of the housing 110 so that the volute 112 and the bottom cover 130 together form a volute. An air inlet 131 is located on the bottom cover 130, and the top cover 120 is disposed at the top of the housing 110. An air outlet 121 is located on the top cover 120.

[0033] It should be noted that the pump casing 100 is formed by assembling a housing 110, a top cover 120, and a bottom cover 130. Specifically, a volute groove 112 is formed on the housing 110, and the bottom cover 130 is fastened and installed at the bottom of the housing 110, so that the volute groove 112 and the bottom cover 130 together form a volute channel. The structure is simple and easy to install. The top cover 120, the bottom cover 130, and the housing 110 are fixed as a whole by one of the following methods: ultrasonic welding, high-frequency welding, or hot-melt welding.

[0034] like Figure 3 As shown, in one embodiment, a screw head 140 is provided on the side of the top cover 120 away from the housing 110, the air outlet 121 is located inside the screw head 140, and the knob 200 is screwed to the screw head 140.

[0035] It should be noted that the screw head 140 has an external thread and the knob 200 has an internal thread. The internal thread and the external thread are fitted together so that the knob 200 is screwed and fixed on the screw head 140.

[0036] like Figure 3 As shown, in one embodiment, a sealing ring 400 is provided inside the knob 200. When the knob 200 is screwed with the screw head 140, the screw head 140 and the knob 200 together clamp the sealing ring 400.

[0037] It should be noted that, in order to improve the sealing performance of the knob 200 to the air outlet 121, a sealing ring 400 is provided on the inner bottom wall of the knob 200 to eliminate the gap between the knob 200 and the screw head 140.

[0038] like Figure 2 and Figure 4 As shown, in one embodiment, a plurality of protrusions 150 are provided on the side of the bottom cover 130 away from the housing 110, and each protrusion 150 is distributed around the air inlet 131.

[0039] It should be noted that, in order to prevent foreign objects inside the inflatable product from blocking the air inlet 131, multiple protrusions 150 are provided on the outer side of the air inlet 131 on the bottom cover 130. Each protrusion 150 is used to push the inner wall of the inflatable product away from a certain distance to ensure that the air inlet 131 is not blocked.

[0040] like Figure 3As shown, in one embodiment, a pump chamber is further provided inside the pump housing 100, and the exhaust port 111 is connected to the air outlet 121 through the pump chamber. The motor 310 is located inside the pump chamber. Thus, the pump chamber is provided inside the pump housing 100 so that the motor 310 can be installed inside the pump chamber.

[0041] like Figure 3 As shown, in one embodiment, a circuit board 330 is also provided inside the pump chamber. The circuit board 330 is electrically connected to the motor 310. A switch 340 is also provided on the circuit board 330. One end of the switch 340 passes through the air outlet 121 to abut against the knob 200.

[0042] It should be noted that when knob 200 is screwed onto screw head 140, knob 200 presses against switch 340, thus turning knob 200 controls the start and stop of motor 310. Specifically, when knob 200 presses against switch 340, motor 310 stops; when knob 200 moves away from switch 340, motor 310 starts. Operation is simple and convenient.

[0043] like Figure 3 As shown, in one embodiment, a top block 210 is provided on the inner bottom wall of the knob 200. When the knob 200 is screwed to the screw head 140, the top block 210 pushes the switch 340.

[0044] It should be noted that the top block 210 is located at the center of the inner bottom wall of the knob 200. When the knob 200 is screwed and fixed to the screw head 140, the top block 210 reliably and stably presses the switch 340.

[0045] like Figure 3 As shown, in one embodiment, a battery compartment 113 is also provided inside the pump housing 100, and a battery 350 is provided inside the battery compartment 113. The battery 350 is electrically connected to the circuit board 330.

[0046] It should be noted that the battery compartment 113 is formed by the housing 110, the top cover 120, and the bottom cover 130. Thus, the battery 350 can be charged and discharged via the circuit board 330, enabling the rotary air pump 10 to be used for charging, making it convenient to use.

[0047] like Figures 1 to 4 As shown, in one embodiment, a soft rubber ring 160 is provided on the outer side wall of the top cover 120.

[0048] It should be noted that, in order to facilitate the fixing of the knob-type air pump 10 to the inflatable product, an integrally molded soft rubber ring 160 is provided on the top cover 120. For example, the top cover 120 is made of hard rubber, and the soft rubber ring 160 is made of silicone. The soft rubber ring 160 is formed on the outer periphery of the top cover 120 using a two-color mold through an integral molding process. By heat-fusion bonding the soft rubber ring 160 to the inflatable product, the knob-type air pump 10 can be fixedly installed on the inflatable product.

[0049] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood to include, but is not limited to, locking and fixing with screws / bolts, and welding. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rotary air pump, characterized in that, include: The pump housing has an air inlet at its bottom and is installed inside an inflatable product to allow the air inlet to communicate with the interior of the inflatable product. A volute is provided inside the pump housing, with the air inlet located on the axial inner wall of the volute. An exhaust port is provided on the radial inner wall of the volute. An air outlet is also provided at the top of the pump housing, and the air outlet communicates with the exhaust port and is used to communicate with the outside. A knob, which is screwed to the pump housing, is used to seal the air outlet; and The exhaust assembly includes a motor and a fan wheel. The motor is disposed on the inner wall of the pump housing near the worm gear, and the fan wheel is disposed on the output shaft of the motor and is located inside the worm gear.

2. The rotary air pump according to claim 1, characterized in that, The pump housing includes a housing, a top cover, and a bottom cover. A volute groove is formed on the housing. The bottom cover is located at the bottom of the housing so that the volute groove and the bottom cover together form the volute channel. The air inlet is located on the bottom cover. The top cover is located at the top of the housing. The air outlet is located on the top cover.

3. The rotary air pump according to claim 2, characterized in that, A screw head is provided on the side of the top cover away from the housing, the air outlet is located inside the screw head, and the knob is screwed to the screw head.

4. The rotary air pump according to claim 3, characterized in that, The knob is provided with a sealing ring. When the knob is screwed to the screw head, the screw head and the knob together clamp the sealing ring.

5. The rotary air pump according to claim 2, characterized in that, The bottom cover has several protrusions on the side away from the housing, and each of the protrusions is distributed around the air inlet.

6. The rotary air pump according to claim 3, characterized in that, The pump casing also has a pump chamber, and the exhaust port of the pump chamber is connected to the air outlet through the pump chamber. The motor is located inside the pump chamber.

7. The rotary air pump according to claim 6, characterized in that, A circuit board is also provided inside the pump chamber. The circuit board is electrically connected to the motor. A switch is also provided on the circuit board. One end of the switch passes through the air outlet to abut against the knob.

8. The rotary air pump according to claim 7, characterized in that, A top block is provided on the inner bottom wall of the knob. When the knob is screwed to the screw head, the top block pushes the switch.

9. The rotary air pump according to claim 7, characterized in that, The pump casing also has a battery compartment, in which a battery is installed, and the battery is electrically connected to the circuit board.

10. The rotary air pump according to claim 2, characterized in that, A soft rubber ring is provided on the outer side wall of the top cover.

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