Electric inflatable device

Abstract

An electric inflation device disclosed in the present invention includes an electric motor, a piston, a cylinder and an exhaust valve, wherein the output shaft of the electric motor is connected to the piston, and the piston moves in the cylinder to compress and inflate the gas. The device is characterized in that the cylinder includes a primary air compression space and a secondary air compression space, and when the piston moves toward the cylinder head, the air in the primary air compression space is compressed and pressurized and discharged into the secondary air compression space, and when the piston moves toward the bottom of the cylinder, the air in the secondary air compression space is compressed again and discharged to the air-using equipment through the exhaust valve, thereby realizing multi-stage compression, ensuring that the pressure entering the air-using equipment is sufficient, and ensuring the inflation effect and efficiency.

Description

Technical Field

[0001] The invention relates to an inflator, in particular to an electric inflator for a headrest or a neckrest. Background Art

[0002] The existing headrest or neck pillow needs to be inflated at any time as needed to adjust the fullness of the headrest or neck pillow. General inflation devices include manual or electric air pumps, and the inflation speed of the electric air pump is relatively slow. After the gas pressure in the headrest or neck pillow becomes large, the inflation speed is greatly reduced, which cannot meet the normal inflation requirements. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide an electric inflator that inflates through multi-stage pressure boosting.

[0004] The objective of the present invention is achieved through the following technical scheme: an electric inflation device, comprising an electric motor, a piston, a cylinder and an exhaust valve, wherein the output shaft of the electric motor is connected to the piston, and the piston moves in the cylinder to compress and inflate the gas, and the cylinder comprises a primary compressed air space and a secondary compressed air space, and when the piston moves toward the cylinder head, the air in the primary compressed air space is compressed and pressurized and discharged into the secondary compressed air space, and when the piston moves toward the bottom of the cylinder, the air in the secondary compressed air space is compressed again and discharged to the gas-using equipment through the exhaust valve.

[0005] As a preferred embodiment, the piston includes a primary piston and a secondary piston, wherein the diameter of the primary piston is larger than the diameter of the secondary piston, and correspondingly, the diameter of the primary compressed air space is larger than the diameter of the secondary compressed air space.

[0006] In the above solution, the secondary compressed air space is provided with an air passage connected to the primary compressed air space, and the outlet of the air passage is located on the bottom surface of the primary compressed air space close to the secondary compressed air space.

[0007] In the improvement of the above scheme, a restoring spring is provided in the secondary compressed air space to return the piston to its original position, and two ends of the restoring spring are respectively connected to the bottom surface of the piston and the bottom surface of the secondary compressed air space.

[0008] A further improvement of the above scheme is that during the movement of the piston, the restoring spring is always kept in a stretched state.

[0009] As a preferred embodiment, it also includes a three-stage compressed air space arranged outside the cylinder, and a three-stage scavenging brush is arranged in the three-stage compressed air space. The piston drives the three-stage scavenging brush to scavenge and discharge air through a linear bearing.

[0010] As an improvement of the above scheme, the linear bearing device includes a first linear bearing fixed on the outer surface of the piston, a rolling gear rotatably connected to the cylinder wall, and a second linear bearing slidably connected to the side of the cylinder wall facing the third-stage compressed air space. The third-stage scavenging brush is fixedly connected to the second linear bearing, and the first linear bearing drives the third scavenging brush to move through the rolling gear and the second linear bearing.

[0011] As a further improvement of the above scheme, the diameter of the rolling gear is smaller than the thickness of the cylinder wall, and the cylinder wall is provided with a sliding groove of the first linear bearing or\ and the second linear bearing, and the first linear bearing or\ and the second linear bearing are sunk into the sliding groove and are airtightly slidably connected.

[0012] As a further improvement of the above solution, the three-stage compressed air space is connected to an exhaust valve, and the exhaust valve is a one-way valve whose force is controlled by a compression spring.

[0013] In the final solution, the output shaft of the electric motor is connected to a fan-shaped pendulum weight, and the fan-shaped pendulum weight is connected to the piston rod.

[0014] Compared with the prior art, the present invention has the following advantages and effects:

[0015] 1) The present invention includes a primary compressed air space and a secondary compressed air space. When the piston moves toward the cylinder head, the air in the primary compressed air space is compressed and pressurized and discharged into the secondary compressed air space. At this time, the vacuum degree of the secondary compressed air space becomes larger, forming a negative pressure, which is conducive to the entry of air from the primary compressed air space. The secondary compressed air space discharges compressed air into the primary compressed air space at the top of the piston through an additional pipeline. When the piston moves toward the bottom of the cylinder, the air in the secondary compressed air space is compressed again and discharged to the gas-using equipment through the exhaust valve. At the same time, fresh air enters the primary compressed air space from the one-way opening and closing valve to prepare for compression. The piston can achieve two-stage compression through one piston and two strokes, increase the air pressure, and thus increase the efficiency of compression.

[0016] 2) A three-stage scavenging brush is provided in the three-stage compressed air space, and the piston drives the three-stage scavenging brush through a linear bearing to scavenge air and discharge it to the exhaust valve. First, when the piston moves to the bottom of the cylinder, the compressed air in the second-stage compressed air space is compressed and enters the three-stage compressed air space. When the piston moves to the top of the cylinder, while compressing the gas in the first-stage compressed air space, the piston drives the three-stage scavenging brush through a linear bearing to compress the three-stage compressed air space outside the cylinder into the exhaust valve, realizing one piston and three compression strokes, greatly improving the inflation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall mechanism diagram of the electric inflator.

[0018] Figure 2 is a cross-sectional view of an electric inflator.

[0019] Figure 3 yes Figure 2 A partial enlarged view of part III. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0021] Reference Figure 1-Figure 3 An electric inflation device comprises an electric motor 1, a piston 2, a cylinder 3 and an exhaust valve 4, wherein the output shaft of the electric motor 1 is connected to the piston 2, and the piston 2 moves in the cylinder 3 to compress and inflate the gas and deliver it to a gas-using device, such as a headrest or a neck pillow. The cylinder 3 comprises a primary compressed air space 301 and a secondary compressed air space 302. When the piston 2 moves toward the cylinder head, the air in the primary compressed air space 301 is compressed and pressurized and discharged into the secondary compressed air space 302. At this time, the vacuum degree of the secondary compressed air space 302 becomes larger, forming a negative pressure, which is conducive to the entry of air into the primary compressed air space 301, and the secondary compressed air space 302 discharges the compressed air into the primary compressed air space 301 at the top of the piston 2 through an additionally arranged pipeline. When the piston 2 moves toward the bottom of the cylinder 3, the air in the secondary compressed air space 301 is compressed again and discharged to the gas-using equipment through the exhaust valve 4. At the same time, fresh air enters the primary compressed air space 301 from the one-way opening and closing valve 5 to prepare for air compression. This piston can achieve two-stage compression through two strokes, increase the air pressure, and thus increase the efficiency of air compression.

[0022] In order to increase the gas pressure in the secondary compressed air space 302, the piston 2 includes a primary piston 201 and a secondary piston 202, wherein the diameter of the primary piston 201 is larger than the diameter of the secondary piston 202, and correspondingly, the diameter of the primary compressed air space 301 is larger than the diameter of the secondary compressed air space 302, so that on the basis of the same piston stroke, the gas pressure in the secondary compressed air space 302 is much greater than that in the primary compressed air space 301.

[0023] Preferably, the secondary compressed air space 302 is provided with an air path channel 6 connected to the primary compressed air space 301, and the outlet of the air path channel 6 is located on the bottom surface 303 of the primary compressed air space 301 close to the secondary compressed air space 302, which can prevent the formation of negative pressure between the primary piston 201 and the bottom surface 303 when the piston 2 just starts to move toward the cylinder head of the cylinder 3, thereby increasing the resistance of the piston 2 to continue to move forward. The air path channel 6 introduces gas to relieve the negative pressure, allowing the piston 2 to move forward with reduced resistance.

[0024] When the piston 2 moves toward the bottom of the cylinder 3, it needs to compress air with a higher atmospheric pressure than the primary compressed air space 301, and the resistance of the piston 2 to move toward the top of the cylinder 3 is much greater. The secondary compressed air space 302 is provided with a restoring spring 7 to return the piston 2 to its original position. The two ends of the restoring spring 7 are respectively connected to the bottom surface of the piston 2 and the bottom surface of the secondary compressed air space 302. The force of the restoring spring 7 increases the force of the piston 2 toward the bottom of the cylinder 3 and reduces the torque of the electric motor 1. During the movement of the piston 2, the restoring spring 7 is always kept in a stretched state.

[0025] In order to be able to increase the pressure again and make full use of the stroke effect of the piston 2, it also includes a three-stage compressed air space 8 arranged on the outside of the cylinder 3, and a three-stage scavenging brush 9 is provided in the three-stage compressed air space 8. The piston 2 drives the three-stage scavenging brush 9 through the linear bearing 10 to scavenge and discharge it to the exhaust valve 4. First, when the piston 2 moves to the bottom of the cylinder, the compressed air in the second-stage compressed air space 302 is compressed and enters the three-stage compressed air space 8. When the piston 2 moves to the top of the cylinder, while compressing the gas in the first-stage compressed air space 301, the piston 2 drives the three-stage scavenging brush 9 through the linear bearing 10 to compress the three-stage compressed air space 8 outside the cylinder 3 into the exhaust valve 4, thereby realizing one piston 2 and three compression strokes.

[0026] In the above scheme, the linear bearing device 10 includes a first linear bearing 101 fixed on the outer surface of the piston 2, a rolling gear 102 rotatably connected to the cylinder wall, and a second linear bearing 103 slidably connected to the side of the cylinder wall facing the third-stage compressed air space 8, wherein the rolling gear 102 can be a combination of multiple parallel ones, the third-stage scavenging brush 9 is fixedly connected to the second linear bearing 103, and the first linear bearing 101 drives the third scavenging brush 9 to move through the rolling gear 102 and the second linear bearing 103.

[0027] Since the inside of the cylinder 3 is a first-stage compressed air space 301, and the outside of the cylinder 3 is a third-stage compressed air space 8, in order to increase the air tightness between the two, the diameter of the rolling gear 102 is smaller than the thickness of the cylinder wall, and the cylinder wall is provided with a sliding groove 11 of the first linear bearing 101 or \ and the second linear bearing 103, the first linear bearing 101 or \ and the second linear bearing 103 are sunk into the sliding groove 11 and are airtightly slidably connected, the first linear bearing 101 and the second linear bearing 103 can be tightly pressed in the sliding groove 11, ensuring that the gas will not leak out when the first linear bearing 101 or the second linear bearing 103 slides. The third-stage compressed air space 8 is connected to the exhaust valve 4. In order to prevent the exhaust valve 4 from automatically opening when the gas pressure is not large enough, the exhaust valve 4 is a one-way valve whose force is controlled by a compression spring 12. The force of the compression spring 12 can be manually adjusted or replaced, thereby adjusting the exhaust pressure of the exhaust valve 4, ensuring that the gas pressure entering the gas-using equipment from the exhaust pipe 14 is sufficient, and meeting the purpose of the invention.

[0028] Since the torque of the electric motor 1 is very large, the output torque needs to be controlled. The output shaft of the electric motor 1 is connected to a fan-shaped pendulum weight 13, which is connected to the piston rod and drives the movement of the piston 2.

[0029] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An electric inflation device, comprising an electric motor, a piston, a cylinder and an exhaust valve, wherein the output shaft of the electric motor is connected to the piston, and the piston moves in the cylinder to compress and inflate the gas, characterized in that: The cylinder includes a primary compressed air space and a secondary compressed air space. When the piston moves toward the cylinder head, the air in the primary compressed air space is compressed and boosted and discharged into the secondary compressed air space. When the piston moves toward the bottom of the cylinder, the air in the secondary compressed air space is compressed again and discharged to the gas-using equipment through the exhaust valve. The piston includes a primary piston and a secondary piston, wherein the diameter of the primary piston is larger than the diameter of the secondary piston, and correspondingly, the diameter of the primary compressed air space is larger than the diameter of the secondary compressed air space. The electric inflatable device also includes a third-stage compressed air space arranged outside the cylinder, and a third-stage scavenging brush is arranged in the third-stage compressed air space. The piston drives the third-stage scavenging brush to scavenge and discharge air through a linear bearing. The linear bearing includes a first linear bearing fixed to the outer surface of the piston, a rolling gear rotatably connected to the cylinder wall, and a second linear bearing slidably connected to the side of the cylinder wall facing the third-stage compressed air space. The third-stage scavenging brush is fixedly connected to the second linear bearing, and the first linear bearing drives the third scavenging brush to move through the rolling gear and the second linear bearing.

2. The electric inflator according to claim 1, characterized in that: The secondary compressed air space is provided with an air passage connected to the primary compressed air space, and the outlet of the air passage is located on the bottom surface of the primary compressed air space close to the secondary compressed air space.

3. The electric inflator according to claim 2, characterized in that: A restoring spring for returning the piston to its original position is arranged in the secondary air compression space, and two ends of the restoring spring are respectively connected to the bottom surface of the piston and the bottom surface of the secondary air compression space.

4. The electric inflator according to claim 3, characterized in that: During the movement of the piston, the restoring spring is always kept in a stretched state.

5. The electric inflator according to claim 1, characterized in that: The diameter of the rolling gear is smaller than the thickness of the cylinder wall, and the cylinder wall is provided with a first linear bearing or a second linear bearing sliding The first linear bearing or the second linear bearing is sunk into the sliding groove and connected in an airtight sliding manner.

6. The electric inflator according to claim 1, characterized in that: The three-stage compressed air space is communicated with an exhaust valve, and the exhaust valve is a one-way valve whose force is controlled by a compression spring.

7. The electric inflator according to claim 1, characterized in that: The output shaft of the electric motor is connected to a fan-shaped pendulum weight, and the fan-shaped pendulum weight is connected to the piston rod.

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