TW201938909A - Variable pressure air pump - Google Patents

Abstract

The present invention provides a variable pressure air pump, which includes a first cylinder, a second cylinder, a first air tube, a piston assembly, a connection device, and an air escape device. The second cylinder is longitudinally movable relative to the first cylinder. The piston assembly can compress air in the first cylinder and selectively compress air in the second cylinder. The connection device is mounted to the first cylinder and is adapted for attaching an inflating object. The air escape device includes a connector and a switcher. The connector is mounted to the second cylinder and includes an escape orifice interconnected with the second cylinder. The switcher is connected to the connector and includes an air slot. The air slot selectively communicates to the escape orifice and communicates external environment to cause the piston assembly selectively to do work on air in the second cylinder to adjust pressure output.

Description

Variable pressure pump

The invention relates to a pump, and in particular to a variable pressure pump.

The technical improvement of the existing pumps is aimed at improving the efficiency of the inflation, but no matter how the pump is improved, it is limited by the cross-sectional area of the cylinder and the pressure is inversely proportional, so that the inflation rate and the inflation effect cannot be taken into account. In order to achieve the design of the high-volume or high-pressure conversion of the pump, such as the Chinese Patent No. 228257, it discloses a pump that can be selected to be fast or high-pressure, including a first cylinder and a second cylinder. The air cylinder and the second air cylinder have the effect of rapid inflation when acting simultaneously. The second cylinder can be fixed to the first cylinder without generating relative movement with the first cylinder, so as to have the effect of increasing the pumping pressure. However, the components of the above patents are too complicated to manufacture and assemble, and they cannot provide intuitive operation methods for users.

The invention provides a variable-pressure inflator, which can choose high-pressure inflation or high-volume inflation.

The variable-pressure air pump provided by the present invention comprises a first air cylinder, a second air cylinder, a first air pipe, a piston group, a connecting device and a venting device. The first cylinder has a first air chamber. The second cylinder is coaxially disposed with the first cylinder and can move axially relative to the first cylinder. The second cylinder has a second air chamber. The first air pipe is disposed in the first air chamber and the second air chamber. The first air pipe has an air passage that unidirectionally connects the first air chamber and the second air chamber. The piston group is capable of compressing the air in the first air chamber and selectively compressing the air in the second air chamber when the second cylinder moves relative to the first cylinder. The connecting device is disposed on the first air cylinder and is suitable for connecting to-be-inflated objects. The connecting device includes a second air pipe, and the second air pipe is coaxially disposed with the first air pipe and can move axially relative to the first air pipe. The venting device includes a connecting piece and a switching piece. The connecting piece is connected to the second cylinder and has a venting hole communicating with the second air chamber. The switching member is connected to the connecting member and changes between the first position and the second position. The switching member has an air guiding groove selectively communicating with the vent hole and the outside and a closing portion selectively closing the vent hole. When the switching member is located in the first position, the air guiding groove communicates with the vent hole, so that the second air chamber communicates with the outside world; when the switching member is in 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 member is annularly and rotatably sleeved on the connecting member, the air guide groove and the closed portion are formed on the inner peripheral surface of the switching member, and between the inner peripheral surface of the switching member and the vent hole. A leak-proof ring is provided, and the closed portion abuts the leak-proof ring when it is in the second position.

In an embodiment of the present invention, the outer peripheral surface of the switching member is provided with a high-pressure indicator corresponding to the air guiding groove, and the outer peripheral surface of the switching member is provided with a high-gas volume indicator corresponding to the closed portion.

In an embodiment of the invention, the first cylinder has a first end and a second end. The first trachea has a first end and a second end. The connection device includes a head and a gas valve. The head is connected to the first end of the first cylinder and the first end of the first air pipe. The second trachea is movably disposed in the airway of the first trachea. The gas nozzle valve is connected to one end of the second air pipe and communicates with the second air pipe.

In an embodiment of the present invention, the second air pipe is made of a flexible material, and the air valve is detachably connected to the head.

In an embodiment of the invention, the second cylinder has a first end and a second end. The connecting member is connected to the second end of the second cylinder. The piston group includes a first piston and a second piston. The first piston is disposed at the first end of the second cylinder and can move axially relative to the first air chamber with the first air pipe as an axis. The second piston is disposed at the second end of the first air pipe and can move axially relative to the second air chamber corresponding to the movement of the second cylinder relative to the first cylinder.

In an embodiment of the invention, the variable-pressure pump further includes a unidirectional device. The one-way device includes a first one-way valve group and a second one-way valve group. The first one-way valve group is disposed at the first end of the first air pipe to allow air to enter the airway from the first air chamber unidirectionally. The second one-way valve group is disposed on the second piston to allow air to enter the air passage from the second air chamber unidirectionally.

In an embodiment of the present invention, the variable-pressure pump further includes a grip pivotally connected to the connecting member, and the grip has a pivot groove selectively abutting the switching member.

In an embodiment of the present invention, an outer cover is provided on the second end of the first cylinder. The outer cover has a supplementary air hole and a first latching portion that communicate with the first air chamber, and the pivot groove has a second latching portion that selectively latches the first latching portion.

In an embodiment of the present invention, the variable pressure inflator further includes a pressure sensing device. The head has a receiving groove communicating with the airway, and the pressure sensing device is disposed in the receiving groove.

Based on the above, the variable-pressure pump provided by the above-mentioned embodiment of the present invention allows the air guide groove to selectively communicate with the vent hole by changing the switching member between the first position and the second position, so the piston group can be selected Work is performed on the air in the second air chamber in order to change the pressure.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of an appearance of a variable pressure air pump according to an embodiment of the present invention. FIG. 2 is an exploded view 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 schematic diagram of using the variable-pressure pump of FIG. 1. Please refer to FIGS. 1 to 4. The variable-pressure pump in this embodiment includes a first cylinder 10, a second cylinder 20, a first air pipe 30, a piston group 40, a connecting device 50, and a venting device 60. , A grip 70, a one-way device 80, and a pressure sensing device 90. The second cylinder 20 is disposed coaxially with the first cylinder 10 and can move axially relative to the first cylinder 10 to compress air. The first air pipe 30 is coaxially disposed in the first cylinder 10 and the second cylinder 20. The piston group 40 can selectively compress the air in the first cylinder 10 and the second cylinder 20 corresponding to the movement of the second cylinder 20 relative to the first cylinder 10. The connecting device 50 is disposed on the first cylinder 10 and is suitable for connecting to-be-inflated objects. The venting device 60 is connected to the second cylinder 20 and selectively communicates the second cylinder 20 with the outside. The handle 70 is pivotally connected to the air deflation device 60 for holding by the user. The one-way device 80 is disposed in the first cylinder 10 and the second cylinder 20 so that air can enter the first air pipe 30 only in one direction. The pressure sensing device 90 is disposed on the connection device 50 and is suitable for measuring air pressure. The venting device 60 selectively communicates the second cylinder 20 with the outside world, so that the piston group 40 selectively performs work on the air in the second cylinder 20 to achieve the purpose of variable pressure, and at the same time provide high pressure or volume Inflatable 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. The outer cover 14 has at least one supplementary air hole 141 and a first latching portion 142 communicating with the first air chamber 13. The air supplement hole 141 is provided on the inner peripheral surface of the outer cover 14, and the first latching portion 142 is circumferentially provided on the outer peripheral surface of the outer cover 14 along the circumferential direction of the outer cover 14. In this embodiment, the outer cover 14 can have three air-filling holes 141, and the three air-filling holes 141 are separated from each other by 120 degrees.

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.

The first air pipe 30 is disposed in the first air chamber 13 and the second air chamber 23. The first air pipe 30 has a first end 31, a second end 32 opposite to the first end 31, and a unidirectional communication with the first The air passages 33 of the air chamber 13 and the second air chamber 23.

The piston group 40 includes a first piston 41 and a second piston 42. 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 first air pipe 30 as an axis to compress the air in the first air chamber 13. The second piston 42 is disposed on the second end 32 of the first 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 air cylinder 10 to selectively compress the second air chamber 23 The air inside.

The connecting device 50 includes a head 51, a second air pipe 52 and a gas valve 53. The head 51 is connected to the first end 11 of the first cylinder 10 and the first end 31 of the first air pipe 30. The head 51 has a receiving groove 511 communicating with the air passage 33. The second air pipe 52 is disposed coaxially with the first air pipe 30 and can move axially relative to the first air pipe 30. Therefore, the second air pipe 52 is movably disposed in the air passage 33 of the first air pipe 30 so as to communicate with the air passage 33. The gas nozzle valve 53 is connected to one end of the second gas pipe 52 and communicates with the second gas pipe 52. The gas valve 53 is suitable for connecting the gas nozzle of the object to be inflated (as shown in FIG. 4). The gas nozzle valve 53 is detachably connected to the head 51 and can be detached from the head 51 in response to the second gas tube 52 moving axially relative to the first gas tube 30. In this embodiment, the second air pipe 52 can be made of a flexible material and cooperates with the axial movement relative to the first air pipe 30, so that the gas valve 53 can be easily connected to the gas nozzle of the object to be inflated.

The venting device 60 includes a connecting member 61, a switching member 62 and at least one anti-drain ring 63. 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 air vent holes 611 and two stop rings 63. The two air vent holes 611 are respectively disposed on opposite sides of the connecting member 61 in the radial direction, and respectively form step holes to be suitable for receiving. Position the two stop rings 63. The switching member 62 is connected to the connecting member 61 and can be changed between a first position and a second position. The switching member 62 has at least one air guide groove 621 selectively communicating with the vent hole 611 and communicating with the outside, and at least one closing portion 622 selectively closing the vent hole 611.

In this embodiment, the switching member 62 is ring-shaped and rotatably sleeved on the connecting member 61. The air guide groove 621 and the closed portion 622 are formed on the inner peripheral surface of the switching member 62, and the anti-drain ring 63 is provided between the inner peripheral surface of the switching member 62 and the air vent hole 611, so that the closed portion 622 abuts when the second position Drain ring 63. The switching member 62 can have two air guide grooves 621 respectively corresponding to the two air vent holes 611 and two closing portions 622 respectively corresponding to the two air vent holes 611. At least one high-pressure indicator 623 is provided on the outer peripheral surface of the switching member 62 corresponding to the air guide groove 621, and at least one high-gas volume indicator 624 is provided on the outer peripheral surface of the switching member 62 corresponding to the closed portion 622.

The grip 70 is pivotally connected to the connecting member 61 by a pin 71. The grip 70 has a pivot groove 72 selectively abutting the switching member 62. The pivot slot 72 has a second latching portion 721 which is selectively coupled to the first latching portion 142. The grip 70 can be pivoted relative to the connecting member 61 to change between the storage position (as shown in FIG. 3) and the use position (as shown in FIG. 4). When the grip 70 is located in the storage position, the second buckle portion 721 buckles. Connected to the first buckling portion 142, the overall appearance of the pump is slightly I-shaped for convenient storage. When the grip 70 is located in the use position, the second buckling portion 721 is separated from the first buckling portion 142, so that the grip 70 and the first cylinder 10 and the second cylinder 20 are disposed in a T-shape so as to facilitate the user to inflate.

The one-way device 80 includes a first one-way valve group 81 and a second one-way valve group 82. The first one-way valve group 81 is disposed on the first end 31 of the first air pipe 30 to allow air to flow unidirectionally from the first An air chamber 13 enters the air passage 33 and the head 51. The second check valve group 82 is disposed on the second piston 42 to allow air to enter the air passage 33 from the second air chamber 23 unidirectionally. In this embodiment, the first check valve group 81 can be made of a soft material, and a cone ring is formed on the outer periphery of the first end 31 of the first air pipe 30. The second check valve group 82 can be composed of a valve hole provided in the second piston 42 and a valve disc movably provided in the valve hole. The first one-way valve group 81 and the second one-way valve group 82 can also be a conventional structure used in the art to limit the one-way flow of fluid.

The pressure sensing device 90 is disposed in the accommodating groove 511 of the head 51 to be suitable for measuring the air pressure value. The pressure sensing device 90 can be a mechanical pressure gauge, an electronic pressure sensing component, etc. And shows the conventional structure of air pressure.

FIG. 4 is a schematic diagram of using the variable-pressure pump of FIG. 1. FIG. 5 is an enlarged schematic view of a circled position in FIG. 4. FIG. 6 is a schematic cross-sectional view taken along the line 6-6 of FIG. 4. FIG. Please refer to FIG. 4 to FIG. 6, when the switching member 62 is located at the first position, the high-pressure mark 623 faces the outside, and the air guide groove 621 communicates with the vent hole 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 hole 611 and the air guide groove 621, that is, the second piston 42 No work is performed 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 so that the compressed air enters the accommodation groove 511 through the air passage 33 and the air passage 33 and the second air pipe 52, respectively. Enter the valve of the object to be aerated with the valve valve 53. Therefore, only the first piston 41 performs work on the air in the first air chamber 13, thereby performing high-pressure inflation.

FIG. 7 is a schematic diagram of using the variable-pressure pump of FIG. 1. FIG. 8 is an enlarged schematic view of a circled part in FIG. 7. FIG. 9 is a schematic cross-sectional view taken along line 9-9 of FIG. 7. Please refer to FIG. 7 to FIG. 9, the user can dial the switch 62 to change the switch 62 from the first position to the second position.

When the switching member 62 is located at the second position, the high-air volume indicator 624 faces the outside, and the closing portion 622 closes the vent hole 611 to isolate the second air chamber 23 from the outside, and the anti-drain ring 63 improves the isolation effect. Therefore, when the second cylinder 20 moves axially relative to the first cylinder 10, both 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, and make the compressed air enter the air passage. 33. The compressed air enters the accommodation groove 511 through the air passage 33, and enters the air nozzle of the object to be inflated through the air passage 33, the second air pipe 52, and the air valve 53. Therefore, the first piston 41 and the second piston 42 perform work on the air in the first air chamber 13 and the second air chamber 23, respectively, thereby performing high-volume inflation.

In summary, the variable pressure pump of this embodiment is changed between the first position and the second position by the switching member 62, so that the air guide groove 621 selectively communicates with the vent hole 611, and the second air chamber 23 It is selectively connected or isolated from the outside, so the second piston 42 can selectively perform work on the air in the second air chamber 23 to achieve the purpose of variable pressure, that is, the user can choose high pressure inflation or high pressure according to the use needs. Inflatable volume.

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

10‧‧‧ the first cylinder

11‧‧‧ the first end

12‧‧‧ the second end

13‧‧‧The first air chamber

14‧‧‧ Cover

141‧‧‧Air hole

142‧‧‧First buckle section

20‧‧‧Second cylinder

21‧‧‧ the first end

22‧‧‧ the second end

23‧‧‧Second Air Chamber

30‧‧‧ first trachea

31‧‧‧ the first end

32‧‧‧ the second end

33‧‧‧Airway

40‧‧‧Piston Set

41‧‧‧First Piston

42‧‧‧Second Piston

50‧‧‧ Connected device

51‧‧‧Head

511‧‧‧Receiving slot

52‧‧‧Second Trachea

53‧‧‧Gas valve

60‧‧‧deflation device

61‧‧‧Connector

611‧‧‧air vent

62‧‧‧Switch

621‧‧‧Air guide trough

622‧‧‧Closed

623‧‧‧High Voltage Mark

624‧‧‧ High Gas Volume Sign

63‧‧‧ Stop ring

70‧‧‧ Grip

71‧‧‧pins

72‧‧‧ pivot groove

721‧‧‧Second buckle section

80‧‧‧ one-way device

81‧‧‧The first check valve

82‧‧‧Second check valve

90‧‧‧pressure sensing device

FIG. 1 is a schematic diagram of an appearance of a variable pressure air pump according to an embodiment of the present invention. FIG. 2 is an exploded view 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 schematic diagram of the use of the variable-pressure air pump of FIG. 1, showing that the switching member is located at the first position. FIG. 5 is an enlarged schematic view of a circled position in FIG. 4. FIG. 6 is a schematic cross-sectional view taken along the line 6-6 of FIG. 4. FIG. FIG. 7 is a schematic diagram of the use of the variable-pressure air pump of FIG. 1, showing that the switching member is located at the second position. FIG. 8 is an enlarged schematic view of a circled part in FIG. 7. FIG. 9 is a schematic cross-sectional view taken along line 9-9 of FIG. 7.

Claims (10)

A variable-pressure air pump includes: a first cylinder having a first air chamber; a second cylinder arranged coaxially with the first cylinder and capable of moving axially relative to the first cylinder; the second cylinder There is a second air chamber; a first air pipe is disposed in the first air chamber and the second air chamber, and the first air pipe has an air passage that unidirectionally connects the first air chamber and the second air chamber A piston group capable of compressing the air in the first air chamber and selectively compressing the air in the second air chamber in response to the movement of the second cylinder relative to the first air cylinder; a connecting device provided in the first air chamber; A cylinder is adapted to connect the object to be inflated, and the connecting device includes a second air pipe, which is coaxially disposed with the first air pipe and can move axially relative to the first air pipe; and a venting device including a connection And a switching member, the connecting member is connected to the second cylinder and has at least one vent hole communicating with the second air chamber, the switching member is connected to the connecting member and changes between the first position and the second position, The switch has to An air guide groove selectively communicating with the air vent hole and the outside and at least one closing portion selectively closing the air vent hole; when the switching member is in the first position, the at least one air guide groove communicates with the at least one air vent hole, so that The second air chamber is in communication with the outside world; when the switching member is in the second position, the at least one closing portion closes the at least one vent hole, so that the second air chamber is isolated from the outside world. The variable-pressure pump according to item 1 of the scope of patent application, wherein the switching member is annularly 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. An inner peripheral surface of the switching member is provided with at least one anti-drain ring between the inner peripheral surface of the switching member and the at least one vent hole, and the at least one closed portion abuts the at least one anti-drain ring when in the second position. The variable pressure pump according to item 2 of the scope of patent application, wherein the outer peripheral surface of the switching member should be provided with at least one high-pressure mark on at least one air guide groove, and the outer peripheral surface of the switching member should be provided with at least one closed portion. A high-volume indicator. The variable-pressure pump according to item 1 of the patent application scope, wherein the first cylinder has a first end and a second end, the first air pipe has a first end and a second end, and the connecting device The head includes a head and a gas nozzle valve. The head is connected to the first end of the first cylinder and the first end of the first air pipe. The second air pipe is axially movably disposed in the airway of the first air pipe. The gas nozzle valve is connected to one end of the second gas pipe and communicates with the second gas pipe. The variable pressure inflator according to item 4 of the application, wherein the second air pipe is made of a flexible material, and the air valve is detachably connected to the head. The variable pressure pump according to item 5 of the patent application, wherein the second cylinder has a first end and a second end, the connecting member is connected to the second end of the second cylinder, and the piston group includes A first piston and a second piston, the first piston is disposed at a first end of the second cylinder and can move axially relative to the first air chamber with the first air pipe as an axis, and the second piston is disposed at The second end of the first air pipe can move axially relative to the second air chamber corresponding to the movement of the second air cylinder relative to the first air cylinder. The variable pressure pump according to item 6 of the patent application scope, further comprising a one-way device including a first one-way valve group and a second one-way valve group, the first one-way valve group A valve group is provided at the first end of the first air pipe to allow air to enter the air passage unidirectionally from the first air chamber, and a second one-way valve group is provided to the second piston to allow air unidirectionally to pass The second air chamber enters the airway. The variable-pressure pump according to any one of claims 4 to 7, further comprising a grip pivotally connected to the connecting member, the grip having a Pivot groove. The variable-pressure pump according to item 8 of the scope of patent application, wherein the second end of the first cylinder is provided with an outer cover, and the outer cover has at least one supplementary air hole and a first card communicating with the first air chamber. The buckle portion has a second buckle portion which selectively buckles the first buckle portion. The variable pressure inflator according to any one of claims 4 to 7, further comprising a pressure sensing device, the head portion has a receiving groove communicating with the airway, and the pressure sensing device is disposed on the The accommodation slot.