TWI704283B - Variable pressure air pump - Google Patents

Abstract

The present invention provides a variable pressure air pump, which includes a first cylinder, a second cylinder, an air tube, a piston assembly, a connection device, an air escape device, and a one-way device. The second cylinder is longitudinally movable relative to the first cylinder. The air tube is disposed in the first and second cylinders and has an assembling portion integrally formed at an end thereof. The piston assembly can compress air in the first and second cylinders. The connection device is mounted to the first cylinder and is adapted to attach an inflating object. The air escape device is configured to selectively seal the second cylinder so that the piston assembly can selectively compress the air in the second cylinder to provide a variable pressure output. The one-way device includes a first one-way assembly mounted at the assembling portion and a second one-way assembly mounted at the piston assembly.

Description

Variable pressure pump

The present invention relates to a variable pressure pump, and particularly relates to a variable pressure pump that can be quickly assembled.

The technical improvements of the existing pumps are all focused on improving the inflation efficiency, but no matter how the pump is improved, the cross-sectional area of the cylinder is inversely proportional to the pressure, so that the inflation rate and the inflation effect cannot be balanced. In order to achieve the conversion design of the pump to output high air volume or high air pressure, such as my country's Announcement No. 228257 Patent, which discloses an air pump that can select fast inflation or high pressure inflation, including a first cylinder and a second cylinder. When the cylinder and the second cylinder act simultaneously, it has the effect of rapid inflation. The second cylinder can be fixed to the first cylinder without relative movement with the first cylinder, so as to have the effect of increasing the pumping pressure. However, the above-mentioned pump requires a complicated assembly procedure, and the manufacturing cost also increases.

The present invention provides a variable pressure pump, which can be quickly assembled and can select high-pressure inflation or high-volume inflation.

The variable pressure pump provided by the present invention includes a first cylinder, a second cylinder, a gas pipe, a piston group, a connecting device, a venting device and a non-reverse device. The first cylinder has a first air chamber. The second cylinder is coaxially arranged with the first cylinder and can move axially relative to the first cylinder. The second cylinder has a second air chamber selectively communicating with the outside. The air pipe is arranged in the first air chamber and the second air chamber. The air pipe has a first end, a second end, an air passage that unidirectionally connects the first air chamber and the second air chamber, and an assembly part. The assembling part is integrally formed at the first end of the trachea. The piston group includes a first piston and a second piston. The first piston is arranged at one end of the second cylinder and can compress the air in the first air chamber. The second piston is arranged at the second end of the air pipe and can selectively compress the air in the second air chamber. The connecting device is arranged at one end of the first cylinder and is suitable for connecting the object to be inflated. The venting device selectively closes the second air chamber to control whether the second air chamber is connected to the outside. The check device includes a first check valve group and a second check valve group. The first check valve group is arranged on the assembly part of the air pipe, and the second check valve group is arranged on the second piston.

In an embodiment of the present invention, the assembling part has a first ring groove, a second ring groove, and a third ring groove. The first ring groove, the second ring groove, and the third ring groove are respectively integrally formed on the outer periphery of the assembling part along the circumferential direction of the assembling part and are parallel to each other. The first check valve group includes a first check member disposed in the first ring groove, a first airtight ring disposed in the second ring groove, and a second airtight ring disposed in the third ring groove.

In an embodiment of the present invention, the first non-return member is made of soft material and has a ring shape, and the outer diameter of the first non-return member gradually increases toward the connecting device along the axial direction of the trachea.

In an embodiment of the present invention, the second piston has a through hole located between the second air chamber and the air passage. The second check valve group includes a second check piece and a third airtight ring, and the second check piece is movably arranged in the perforation. The third airtight ring is sleeved on the outer periphery of the second piston.

In an embodiment of the present invention, the second non-return member is spherical.

In an embodiment of the present invention, the venting device includes a connecting piece and a switching piece. The connecting piece is connected to the second cylinder and has a bleed hole communicating with the second air chamber. The switching element is connected to the connecting element and can be switched between the first position and the second position. The switching member has an air guiding groove selectively communicating with the vent hole and communicating with the outside, and a closing portion selectively closing the vent hole. When the switching element is at the first position, the air guiding groove is connected to the air vent, and the second air chamber is connected to the outside. When the switching element is located at the second position, the closing portion closes the vent hole, and the second air chamber is isolated from the outside.

In an embodiment of the present invention, the switching element is annular and rotatably sleeved on the connecting element. The air guide groove and the closing portion are formed on the inner peripheral surface of the switching element. The outer peripheral surface of the switching member is provided with a high-pressure mark corresponding to the air guide groove. The outer peripheral surface of the switching member is provided with a high gas volume indicator corresponding to the closed part.

In an embodiment of the present invention, the connecting device includes a head and an air nozzle valve set arranged on the head. The head is connected to one end of the first cylinder, and the air nozzle valve group communicates with the air passage.

In an embodiment of the present invention, the variable pressure pump further includes a handle pivotally connected to the connecting member through the pin member.

In an embodiment of the present invention, the first cylinder includes an outer cover, and the outer cover has an air supplement hole communicating with the first air chamber.

Based on the above, the variable pressure pump provided by the above embodiment of the present invention is integrally formed at one end of the trachea by the assembling part. During assembly, the first check valve group can be installed to the assembling part first, and then assembled in sequence The first cylinder, the air pipe and the second cylinder and other components can be assembled quickly.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the appearance of a variable pressure pump according to an embodiment of the present invention. Fig. 2 is an exploded schematic diagram of the variable pressure pump of Fig. 1. Fig. 3 is a schematic cross-sectional view of the variable pressure pump of Fig. 1. Fig. 4 is a partially enlarged schematic diagram of Fig. 3. Fig. 5 is a schematic diagram of the action of the variable pressure pump of Fig. 1.

1 to 5, the variable pressure pump of this embodiment includes a first cylinder 10, a second cylinder 20, an air pipe 30, a piston group 40, a connecting device 50, a vent device 60, a Handle 70 and an anti-reverse device 80. The second cylinder 20 is coaxially arranged with the first cylinder 10 and can move axially relative to the first cylinder 10. The air pipe 30 is coaxially arranged in the first cylinder 10 and the second cylinder 20. The piston group 40 moves relative to the first cylinder 10 corresponding to the second cylinder 20 and can compress the air in the first cylinder 10 and the second cylinder 20. The connecting device 50 is arranged on the first cylinder 10 and is suitable for connecting an object to be inflated. The bleeder device 60 selectively closes the second cylinder 20 to control whether the second cylinder 20 is connected to the outside. The handle 70 is pivotally connected to the deflation device 60 for the user to hold. The anti-reverse device 80 is arranged in the first cylinder 10 and the second cylinder 20 so that the compressed air can only enter the air pipe 30 in one direction. The second cylinder 20 is selectively connected to the outside by the air bleeding device 60, so that the piston group 40 selectively works on the air in the second cylinder 20 to achieve the effect of variable pressure, while providing high air pressure or high air volume. Inflation mode.

The first cylinder 10 has a first end 11, a second end 12 opposite to the first end 11, and a first air chamber 13. The first cylinder 10 is provided with an outer cover 14 at the second end 12, and the outer cover 14 has a supplementary air hole 141 communicating with the first air chamber 13. The supplementary air hole 141 is provided on the inner peripheral surface of the outer cover 14.

The second cylinder 20 has a first end 21, a second end 22 opposite to the first end 21, and a second air chamber 23 selectively communicating with the outside.

The air pipe 30 is arranged in the first air chamber 13 and the second air chamber 23. The air pipe 30 has a first end 31, a second end 32 opposite to the first end 31, and a unidirectional communication between the first air chamber 13 and The air passage 33 of the second air chamber 23 and an assembly part 34. The assembling portion 34 is integrally formed at the first end 31 of the air pipe 30 and has a first ring groove 341, a second ring groove 342 and a third ring groove 343. The first ring groove 341, the second ring groove 342, and the third ring groove 343 are respectively integrally formed on the outer periphery of the assembling part 34 along the circumferential direction of the assembling part 34 and are parallel to each other.

The piston assembly 40 includes a first piston 41 and a second piston 42. As shown in FIG. 5, the first piston 41 is disposed at the first end 21 of the second cylinder 20 and can move axially relative to the first air chamber 13 with the air pipe 30 as the axis, so as to compress the air in the first air chamber 13. The second piston 42 is disposed at the second end 32 of the air pipe 30 and can move axially relative to the second air chamber 23 corresponding to the movement of the second cylinder 20 relative to the first cylinder 10 to selectively compress the air in the second air chamber 23 air. The second piston 42 has a through hole 421 located between the second air chamber 23 and the air passage 33.

The connecting device 50 includes a head 51 and an air nozzle valve group 52 disposed on the head 51. The head 51 is connected to the first end 11 of the first cylinder 10 and the first end 31 of the air pipe 30. The gas nozzle valve group 52 communicates with the air passage 33 and is suitable for connecting the gas nozzle of the inflatable object.

The deflation device 60 includes a connecting piece 61 and a switching piece 62. The connecting member 61 is connected to the second end 22 of the second cylinder 20 and has at least one vent hole 611 communicating with the second air chamber 23. In this embodiment, the connecting member 61 can have two vent holes 611, and the two vent holes 611 are respectively disposed on opposite sides of the connecting member 61 in the radial direction. The switching member 62 is connected to the connecting member 61 and can be switched between the first position and the second position. The switching member 62 has at least one air guiding groove 621 that selectively communicates with the vent hole 611 and communicates with the outside, and at least one closing portion 622 that selectively closes the vent hole 611.

In this embodiment, the switching member 62 is annular and rotatably sleeved on the connecting member 61 to rotate relative to the connecting member 61 to switch between the first position and the second position. The air guide groove 621 and the closing portion 622 are formed on the inner peripheral surface of the switching element 62. The switching member 62 can have two air guiding grooves 621 corresponding to the two vent holes 611 and two closing portions 622 respectively corresponding to the two vent holes 611. At least one high-pressure mark 623 is provided on the outer peripheral surface of the switching element 62 corresponding to the air guide groove 621, and at least one high-pressure mark 624 is provided on the outer peripheral surface of the switching element 62 corresponding to the closed portion 622.

When the switching element 62 is at the first position, the high pressure indicator 623 faces the outside, and the air guiding groove 621 communicates with the air vent 611, so that the second air chamber 23 communicates with the outside. Therefore, when the second cylinder 20 moves axially relative to the first cylinder 10, the air in the second air chamber 23 is pushed by the second piston 42 and escapes to the outside through the vent 611 and the air guide groove 621, that is, the second piston 42 No work is done on the air in the second air chamber 23, and only the first piston 41 can compress the air in the first air chamber 13, thereby performing high-pressure inflation.

When the switching element 62 is at the second position, the high air volume indicator 624 faces the outside, and the closing portion 622 closes the air vent 611 to isolate the second air chamber 23 from the outside. Therefore, when the second cylinder 20 moves axially relative to the first cylinder 10, the first piston 41 and the second piston 42 can compress the air in the first air chamber 13 and the second air chamber 23, respectively, thereby performing high-volume inflation. .

The grip 70 is pivotally connected to the connecting member 61 by a pin 71, so that the grip 70 can be arranged in a T-shape with the first cylinder 10 and the second cylinder 20 to facilitate the user to operate and inflate.

The check device 80 includes a first check valve group 81 and a second check valve group 82. The first check valve group 81 is provided in the assembly portion 34 of the air pipe 30. The second check valve group 82 is provided on the second piston 42. The first check valve group 81 includes a first check member 811 disposed in the first ring groove 341, a first airtight ring 812 disposed in the second ring groove 342, and a first airtight ring 812 disposed in the third ring groove 343 Two airtight ring 813. The first non-return member 811 can be made of a soft material and formed into a ring shape, and the outer diameter of the first non-return member 811 gradually increases along the axial direction of the air pipe 30 toward the head 51 to allow the compressed air to flow from the first The air chamber 13 enters the air passage 33 and the head 51. The first airtight ring 812 provides an airtight function between the air passage 33 and the first air chamber 13. The second airtight ring 813 provides an airtight function between the air passage 33 and the head 51. The second check valve group 82 includes a second check component 821 and a third airtight ring 822. The second non-return member 821 is movably disposed in the perforation 421 to allow compressed air to enter the air passage 33 from the second air chamber 23 through the perforation 421 in one direction. In this embodiment, the second non-return member 821 is spherical. The third airtight ring 822 is sleeved on the outer periphery of the second piston 42 to provide an airtight function between the second piston 42 and the second air chamber 23.

In summary, the variable pressure pump of this embodiment is integrally formed on the first end 31 of the trachea 30 by the assembling part 34. During assembly, the first check valve 811, the first airtight ring 812, and the second airtight ring 813 of the first check valve group 81 can be sequentially installed to the first ring groove 341 and the second ring groove of the assembly part 34 342 and the third ring groove 343. The head 51 is assembled to the first end 11 of the first cylinder 10; the air pipe 30 is installed in the first cylinder 10; the second cylinder 20 is sleeved with the air pipe 30; the connecting piece 61 is connected to the second end 22 of the second cylinder 20. You can complete most of the assembly procedures of the pump to achieve the purpose of rapid assembly.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

10‧‧‧First cylinder 11‧‧‧First end 12‧‧‧Second end 13‧‧‧First air chamber 14‧‧‧Outer cover 141‧‧‧Air supply hole 20‧‧‧Second cylinder 21‧ ‧‧First end 22‧‧‧Second end 23‧‧‧Second air chamber 30‧‧‧Air pipe 31‧‧‧First end 32‧‧‧Second end 33‧‧‧Air passage 34‧‧‧Assembly part 341‧‧‧First ring groove 342‧‧‧Second ring groove 343‧‧‧Third ring groove 40‧‧‧Piston group 41‧‧‧First piston 42‧‧‧Second piston 421‧‧‧Perforation 50 ‧‧‧Connecting device 51‧‧‧Head 52‧‧‧Air nozzle valve group 60‧‧‧Venting device 61‧‧‧Connecting piece 611‧‧‧Vent hole 62‧‧‧Switching piece 621‧‧‧Air guide groove 622‧‧‧Close part 623‧‧‧High pressure mark 624‧‧‧High gas volume mark 70‧‧‧Handle 71‧‧‧Pin 80‧‧‧Check device 81‧‧‧First check valve group 811‧ ‧‧The first non-return piece 812‧‧‧The first airtight ring 813‧‧‧The second airtight ring 82‧‧‧The second check valve group 821‧‧‧The second non-return piece 822‧‧‧The third Airtight ring

Fig. 1 is a schematic diagram of the appearance of a variable pressure pump according to an embodiment of the present invention. Fig. 2 is an exploded schematic diagram of the variable pressure pump of Fig. 1. Fig. 3 is a schematic cross-sectional view of the variable pressure pump of Fig. 1. Fig. 4 is a partially enlarged schematic diagram of Fig. 3. Fig. 5 is a schematic diagram of the action of the variable pressure pump of Fig. 1.

10‧‧‧First cylinder

11‧‧‧First end

12‧‧‧Second end

13‧‧‧First air chamber

14‧‧‧Outer cover

141‧‧‧Supplementing pores

20‧‧‧Second cylinder

21‧‧‧First end

22‧‧‧Second end

23‧‧‧Second Air Chamber

30‧‧‧Trachea

31‧‧‧First end

32‧‧‧Second end

33‧‧‧Airway

34‧‧‧Assembly Department

41‧‧‧First Piston

42‧‧‧Second Piston

421‧‧‧ Piercing

50‧‧‧Connecting device

51‧‧‧Head

52‧‧‧Air valve group

60‧‧‧Venting device

61‧‧‧Connecting piece

611‧‧‧Vent hole

62‧‧‧Switch

621‧‧‧Air guide groove

622‧‧‧Closed part

623‧‧‧High voltage marking

624‧‧‧High gas volume indication

70‧‧‧ Grip

71‧‧‧pin

82‧‧‧Second check valve group

821‧‧‧Second non-return piece

822‧‧‧The third airtight ring

Claims (10)

A variable pressure pump includes: a first cylinder having a first air chamber; a second cylinder which is arranged coaxially with the first cylinder and can move axially relative to the first cylinder, the second cylinder There is a second air chamber selectively communicating with the outside; an air pipe is arranged in the first air chamber and the second air chamber, the air pipe has a first end, a second end, and a one-way communication with the The air passages of the first air chamber and the second air chamber, and an assembling part integrally formed at the first end of the air pipe; a piston set including a first piston and a second piston, the first The piston is arranged at one end of the second cylinder and can compress the air in the first air chamber, and the second piston is arranged at the second end of the air pipe and can selectively compress the air in the second air chamber; a connecting device, It is arranged at one end of the first cylinder and is suitable for connecting to an object to be inflated; a venting device which selectively closes the second air chamber to control whether the second air chamber is connected to the outside or not; and a non-return device, It includes a first check valve group and a second check valve group. The first check valve group is arranged at the assembling part of the air pipe, and the second check valve group is arranged on the second piston. The variable pressure pump according to the first item of the patent application, wherein the assembling part has a first ring groove, a second ring groove and a third ring groove, the first ring groove and the second ring groove And the third ring grooves are respectively integrally formed on the outer periphery of the assembling part along the circumferential direction of the assembling part and are parallel to each other, and the first check valve group includes a first check piece arranged in the first ring groove , A first airtight ring arranged in the second ring groove and a second airtight ring arranged in the third ring groove. According to the variable pressure pump described in item 2 of the scope of patent application, the first non-return member is made of soft material and has a ring shape, and the outer diameter of the first non-return member faces the air pipe along the axial direction. The number of connected devices is increasing. The variable pressure pump according to item 1 of the scope of patent application, wherein the second piston has a perforation between the second air chamber and the air passage, and the second check valve group includes a second check And a third airtight ring, the second anti-reverse part is movably arranged in the through hole, and the third airtight ring is sleeved on the outer periphery of the second piston. As described in item 4 of the scope of patent application, the second non-return member is spherical. According to the variable pressure pump according to any one of the first to the fifth of the scope of the patent application, the bleed device includes a connecting member and a switching member, the connecting member is connected to the second cylinder and has at least one communication with the first A vent hole of two air chambers, the switch piece is connected to the connecting piece and can be switched between a first position and a second position, the switch piece has at least one air guide groove selectively communicating with the vent hole and the outside world, and At least one sealing portion that selectively closes the vent hole; when the switching element is in the first position, the at least one air guiding groove communicates with the at least one vent hole, and the second air chamber communicates with the outside; when the switching element is located in the second position Position, the at least one closing portion closes the at least one vent hole, and the second air chamber is isolated from the outside. The variable pressure pump as described in item 6 of the scope of patent application, wherein the switching member is annular and rotatably sleeved on the connecting member, and the at least one air guiding groove and the at least one closing portion are formed on the switching member At least one high-pressure mark should be provided on the outer peripheral surface of the switching element, and at least one high-pressure mark should be provided on the outer peripheral surface of the switching element at least one closed portion. The variable pressure pump according to any one of the 1st to 5th scope of the patent application, wherein the connecting device includes a head and a nozzle valve set arranged on the head, and the head is connected to the first At one end of the cylinder, the air nozzle valve group is connected to the air passage. The variable pressure pump as described in item 6 of the scope of patent application further includes a handle pivotally connected to the connecting member through a pin member. According to the variable pressure pump according to any one of claims 1 to 5, the first cylinder includes an outer cover, and the outer cover has an air supplement hole communicating with the first air chamber.

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