TWI645111B - Variable pressure air pump - Google Patents

Abstract

The present invention provides a variable pressure pump that includes a first cylinder, a second cylinder, a first air tube, a piston set, a connecting device, and a deflation device. The first cylinder, the second cylinder, and the first air tube are coaxially disposed and movable relative to each other. The piston set is capable of compressing air within the first cylinder and selectively compressing air within the second cylinder. The connecting device is disposed at the first cylinder and is adapted to connect the object to be inflated. The deflation device includes a connecting member and a switching member, the connecting member is connected to the second cylinder and has a venting hole communicating with the second cylinder, and the switching member is connected to the connecting member and has an air guiding groove that selectively communicates with the vent hole and communicates with the outside. The piston group selectively communicates with the air in the second cylinder by selectively connecting the air venting holes through the air guiding groove to achieve the purpose of changing the pressure.

Description

Variable pressure pump

This invention relates to an inflator and, more particularly, to a variable pressure inflator.

The technical improvement of the existing pump is focused on improving the charging efficiency, 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 achieved. In order to achieve a conversion design capable of outputting a high air volume or a high air pressure, such as the Chinese Patent No. 228257 patent, it discloses a pump capable of selecting a quick inflation or a high pressure inflation, comprising a first cylinder and a second cylinder, first When the cylinder and the second cylinder act simultaneously, the cylinder has a quick inflation effect. The second cylinder can be locked to the first cylinder without relative movement with the first cylinder to have the effect of increasing the pumping pressure. However, the components of the above patents are too complicated to manufacture and assemble, and cannot be used to provide an intuitive operation mode for the user.

The present invention provides a variable pressure pump that is capable of selecting a high pressure charge or a high volume charge.

The variable pressure pump provided by the present invention comprises a first cylinder, a second cylinder, a first air pipe, a piston set, a connecting device and a deflation device. The first cylinder has a first plenum. The second cylinder is disposed coaxially with the first cylinder and is axially movable relative to the first cylinder, and the second cylinder has a second air chamber. The 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 communicates the first air chamber and the second air chamber. The piston group is capable of compressing air in the first air chamber and selectively compressing air in the second air chamber corresponding to the movement of the second cylinder relative to the first cylinder. The connecting device is disposed on the first cylinder and is adapted to connect the object to be inflated, and the connecting device comprises a second air pipe, the second air pipe is disposed coaxially with the first air pipe and is axially movable relative to the first air pipe. The deflation device includes a connecting member and a switching member, and the connecting member is coupled to the second cylinder and has a vent hole communicating with the second plenum. The switching member is coupled to the connecting member and is changed between the first position and the second position, the switching member having a gas guiding groove selectively connecting the air leakage hole and communicating with the outside and a closing portion selectively closing the air leakage hole. When the switching member is in the first position, the air guiding groove communicates with the air leakage hole to connect the second air chamber with the outside; when the switching member is in the second position, the closing portion closes the air leakage hole to isolate the second air chamber from the outside.

In an embodiment of the invention, the switching member is annularly and rotatably sleeved on the connecting member, and the air guiding groove and the closing portion are formed on the inner circumferential surface of the switching member, and between the inner circumferential surface of the switching member and the air vent hole A stagnation ring is provided, and the closure portion abuts the stagnation ring when in the second position.

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

In an embodiment of the invention, the first cylinder has a first end and a second end. The first air tube has a first end and a second end. The connecting device includes a head and a valve. The head is coupled to the first end of the first cylinder and the first end of the first air tube. The second air tube is axially displaceably disposed within the air passage of the first air tube. The gas nozzle valve is connected to one end of the second gas pipe and communicates with the second gas pipe.

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

In an embodiment of the invention, the second cylinder has a first end and a second end. The connector is coupled to the second end of the second cylinder. The piston set includes a first piston and a second piston. The first piston is disposed at the first end of the second cylinder and is axially movable relative to the first air chamber with the first air tube as an axis. The second piston is disposed at the second end of the first air pipe and is movable 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 one-way device. The one-way device includes a first one-way valve group and a second one-way valve group. A first one-way valve block is disposed at the first end of the first air tube to allow air to enter the air passage from the first air chamber unidirectionally. A second one-way valve block is disposed to the second piston to allow air to enter the air passage from the second air chamber unidirectionally.

In an embodiment of the invention, the variable pressure pump further includes a grip pivotally coupled to the connector, the grip having a pivot slot that selectively abuts the switching member.

In an embodiment of the invention, the second end of the first cylinder is provided with an outer cover. The outer cover has a gas supply hole communicating with the first air chamber and a first fastening portion, and the pivot groove has a second fastening portion for selectively fastening the first fastening portion.

In an embodiment of the invention, the variable pressure pump further includes a pressure sensing device, the head has a receiving groove that communicates with the air passage, and the pressure sensing device is disposed in the receiving groove.

Based on the above, the variable pressure pump provided by the above embodiment of the present invention can change the air guiding groove to selectively connect the air venting hole by changing the switching member between the first position and the second position, so that the piston group can be selected. Sexually work on the air in the second air chamber to achieve the purpose of changing pressure.

The above described features and advantages of the invention will be apparent from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of a variable pressure inflator according to an embodiment of the present invention. 2 is a schematic exploded view of the variable pressure pump of FIG. 1. 3 is a schematic cross-sectional view of the variable pressure pump of FIG. 1. 4 is a schematic view showing the use of the variable pressure pump of FIG. 1. Referring to FIG. 1 to FIG. 4 , the variable pressure pump of the present embodiment includes a first cylinder 10 , a second cylinder 20 , a first air tube 30 , a piston set 40 , a connecting device 50 , and a deflation 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 is axially movable 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 is capable of selectively compressing the air in the first cylinder 10 and the second cylinder 20 in response to the movement of the second cylinder 20 relative to the first cylinder 10. The connecting device 50 is disposed in the first cylinder 10 and is adapted to connect the object to be inflated. The deflation device 60 is coupled to the second cylinder 20 and selectively causes the second cylinder 20 to communicate with the outside. The grip 70 is pivotally connected to the deflation device 60 for the user to hold. The unidirectional device 80 is disposed in the first cylinder 10 and the second cylinder 20 such that air can enter the first air tube 30 only in one direction. The pressure sensing device 90 is disposed in the connecting device 50 and is adapted to measure air pressure. The second cylinder 20 is selectively communicated with the outside by the deflation device 60, so that the piston group 40 selectively performs work on the air in the second cylinder 20 to achieve the purpose of changing pressure while providing high air pressure or high air volume. Inflatable mode.

The first cylinder 10 has a first end 11, a second end 12 opposite the first end 11, and a first plenum 13. The first cylinder 10 is provided with an outer cover 14 at the second end 12, and the outer cover 14 has at least one air supply hole 141 and a first fastening portion 142 that communicate with the first air chamber 13. The air supply hole 141 is provided on the inner circumferential surface of the outer cover 14, and the first fastening portion 142 is annularly provided on the outer circumferential surface of the outer cover 14 in the circumferential direction of the outer cover 14. In the present embodiment, the outer cover 14 can have three air supply holes 141, and the three air supply holes 141 are spaced apart from each other by 120 degrees.

The second cylinder 20 has a first end 21, a second end 22 opposite the first end 21, and a second plenum 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 first-way communication. The air chamber 13 and the air passage 33 of the second air chamber 23.

The piston set 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 is axially movable relative to the first air chamber 13 with the first air tube 30 as an axis to compress the air in the first air chamber 13. The second piston 42 is disposed at the second end 32 of the first air pipe 30 and is axially movable 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 second air chamber 23 The air inside.

The connecting device 50 includes a head portion 51, a second air tube 52, and a nozzle 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 tube 30. The head 51 has a receiving groove 511 that communicates with the air passage 33. The second air tube 52 is disposed coaxially with the first air tube 30 and is axially movable relative to the first air tube 30. Therefore, the second air tube 52 is axially movably disposed in the air passage 33 of the first air tube 30 to communicate the air passage 33. The nozzle valve 53 is connected to one end of the second air tube 52 and communicates with the second air tube 52, and the air nozzle valve 53 is adapted to connect the air nozzle of the object to be inflated (as shown in FIG. 4). The valve valve 53 is detachably coupled to the head portion 51 and is movable away from the head portion 51 in response to the second air tube 52 moving axially relative to the first air tube 30. In the present embodiment, the second air tube 52 can be made of a flexible material and fits axially with respect to the first air tube 30 to enable the air nozzle valve 53 to be easily connected to the air nozzle of the object to be inflated.

The deflation device 60 includes a connecting member 61, a switching member 62 and at least one stagnation ring 63. The connecting member 61 is coupled to the second end 22 of the second cylinder 20 and has at least one venting opening 611 communicating with the second plenum 23. In this embodiment, the connecting member 61 can have two air venting holes 611 and two venting rings 63 respectively disposed on opposite sides of the connecting member 61 in the radial direction, and respectively forming a class hole for accommodating The two stagnation rings 63 are positioned. The switching member 62 is coupled to the connector 61 and is switchable between a first position and a second position. The switching member 62 has at least one air guiding groove 621 selectively communicating with the air leakage hole 611 and communicating with the outside, and at least one closing portion 622 selectively closing the air leakage hole 611.

In the embodiment, the switching member 62 is annularly and rotatably sleeved on the connecting member 61. The air guiding groove 621 and the closing portion 622 are formed on the inner circumferential surface of the switching member 62, and the snorting ring 63 is disposed between the inner circumferential surface of the switching member 62 and the air venting hole 611 to abut the closing portion 622 in the second position. Stop ring 63. The switching member 62 can have two air guiding slots 621 corresponding to the two air venting holes 611 and two closing portions 622 respectively corresponding to the two air venting holes 611. The outer circumferential surface of the switching member 62 is provided with at least one high pressure indicator 623 corresponding to the air guiding groove 621, and the outer circumferential surface of the switching member 62 is provided with at least one high air volume indicator 624 corresponding to the closing portion 622.

The grip 70 is pivotally connected to the connecting member 61 by a pin member 71 having a pivot groove 72 that selectively abuts the switching member 62. The pivot slot 72 has a second latching portion 721 that selectively snaps 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 in the storage position, the second latching portion 721 is buckled. Connected to the first fastening portion 142, the overall appearance of the pump is slightly I-shaped to facilitate storage. When the grip 70 is in the use position, the second latching portion 721 is disengaged from the first latching portion 142, so that the grip 70 and the first cylinder 10 and the second cylinder 20 are slightly T-shaped for the user to operate the inflation.

The unidirectional device 80 includes a first check valve group 81 and a second check valve group 82. The first check valve group 81 is disposed at the first end 31 of the first air pipe 30 to allow air to be unidirectionally An air chamber 13 enters the air passage 33 and the head portion 51. The second check valve block 82 is disposed to the second piston 42 to allow air to enter the air passage 33 from the second air chamber 23 unidirectionally. In the present embodiment, the first check valve group 81 can be made of a soft material, and a tapered ring is formed on the outer circumference 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 plate movably disposed in the valve hole. The first check valve group 81 and the second check valve group 82 can also be used in the prior art to limit the one-way flow of the fluid.

The pressure sensing device 90 is disposed in the receiving groove 511 of the head 51 for measuring the air pressure value, and the pressure sensing device 90 can be used for measuring the mechanical pressure gauge, the electronic pressure sensing component, and the like. And shows the custom structure of air pressure.

4 is a schematic view showing the use of the variable pressure pump of FIG. 1. Figure 5 is an enlarged schematic view of the circled portion of Figure 4. Figure 6 is a schematic cross-sectional view taken along line 6-6 of Figure 4; Referring to FIG. 4 to FIG. 6, when the switching member 62 is in the first position, the high pressure indicator 623 faces the outside, and the air guiding groove 621 communicates with the air venting hole 611 to connect the second air chamber 23 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 to escape to the outside through the air vent 611 and the air guiding groove 621, that is, the second piston 42. Without the work of the air in the second air chamber 23, only the first piston 41 can compress the air in the first air chamber 13, and the compressed air enters the receiving groove 511 through the air passage 33, respectively, and through the air passage 33 and the second air tube 52. And the gas nozzle valve 53 enters the gas nozzle of the object to be inflated. Therefore, only the first piston 41 works on the air in the first air chamber 13, thereby performing high pressure inflation.

Figure 7 is a schematic illustration of the use of the variable pressure pump of Figure 1. Figure 8 is an enlarged schematic view of the circled portion of Figure 7. Figure 9 is a schematic cross-sectional view taken along line 9-9 of Figure 7. Referring to FIGS. 7-9, the user can toggle the switching member 62 to change the switching member 62 from the first position to the second position.

When the switching member 62 is in the second position, the high air volume indicator 624 faces the outside, the closing portion 622 closes the air vent 611, the second air chamber 23 is isolated from the outside, and the snorting ring 63 enhances the insulation effect. Therefore, when the second cylinder 20 moves axially relative to the first cylinder 10, the first piston 41 and the second piston 42 can respectively compress the air in the first air chamber 13 and the second air chamber 23, and allow the compressed air to enter the air passage. 33. The compressed air enters the accommodating 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 tube 52, and the air nozzle valve 53. Therefore, the first piston 41 and the second piston 42 respectively work on the air in the first air chamber 13 and the second air chamber 23, thereby performing high air volume inflation.

In summary, the variable pressure pump of the embodiment is changed between the first position and the second position by the switching member 62, so that the air guiding groove 621 selectively communicates with the air vent 611 to make the second air chamber 23 Selectively connected or isolated from the outside, the second piston 42 can selectively work on the air in the second air chamber 23 for the purpose of changing the pressure, that is, the user can select the high pressure inflation or the high according to the use requirement. The air volume is inflated.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧First cylinder

11‧‧‧ first end

12‧‧‧ second end

13‧‧‧First air chamber

14‧‧‧ Cover

141‧‧‧ venting holes

142‧‧‧First buckle

20‧‧‧second cylinder

21‧‧‧ first end

22‧‧‧ second end

23‧‧‧Second chamber

30‧‧‧First trachea

31‧‧‧ first end

32‧‧‧second end

33‧‧‧ airway

40‧‧‧Piston Group

41‧‧‧First Piston

42‧‧‧second piston

50‧‧‧Connecting device

51‧‧‧ head

511‧‧‧ accommodating slots

52‧‧‧second trachea

53‧‧‧ valve valve

60‧‧‧Ventilator

61‧‧‧Connecting parts

611‧‧‧ Ventilation holes

62‧‧‧Switching parts

621‧‧‧air guide

622‧‧‧Closed Department

623‧‧‧High pressure indication

624‧‧‧High volume indication

63‧‧‧Stop ring

70‧‧‧ grip

71‧‧‧ Pins

72‧‧‧ pivot slot

721‧‧‧Second buckle

80‧‧‧One-way device

81‧‧‧First check valve group

82‧‧‧Second check valve group

90‧‧‧ Pressure sensing device

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of a variable pressure inflator according to an embodiment of the present invention. 2 is a schematic exploded view of the variable pressure pump of FIG. 1. 3 is a schematic cross-sectional view of the variable pressure pump of FIG. 1. 4 is a schematic view of the use of the variable pressure pump of FIG. 1 showing the switching member in a first position. Figure 5 is an enlarged schematic view of the circled portion of Figure 4. Figure 6 is a schematic cross-sectional view taken along line 6-6 of Figure 4; Figure 7 is a schematic illustration of the use of the variable pressure pump of Figure 1 showing the shifting member in a second position. Figure 8 is an enlarged schematic view of the circled portion of Figure 7. Figure 9 is a schematic cross-sectional view taken along line 9-9 of Figure 7.

Claims (9)

A variable pressure pump includes: a first cylinder having a first air chamber; a second cylinder coaxially disposed with the first cylinder and movable axially relative to the first cylinder, the second cylinder Having a second air chamber; a first air tube disposed in the first air chamber and the second air chamber, the first air tube having an air passage unidirectionally communicating the first air chamber and the second air passage a gas chamber; a piston group corresponding to the movement of the second cylinder relative to the first cylinder to compress air in the first air chamber and selectively compress air in the second air chamber; a connecting device disposed on The first cylinder is adapted to be connected to the object to be inflated, the connecting device comprises a second air pipe coaxially disposed with the first air pipe and axially movable relative to the first air pipe; and a deflation device including a connecting member and a switching member connected to the second cylinder and having at least one vent hole, the at least one vent hole communicating with the second plenum, the switching member being connected to the connecting member and being in the first position Transformation between second positions The switching member has at least one air guiding slot and the at least one air guiding slot selectively communicating with the at least one air venting hole and communicating with the outside, the at least one closing portion selectively closing the at least one air venting hole, the switching component The at least one air guiding groove and the at least one closing portion are formed on an inner circumferential surface of the switching member, and the inner circumferential surface of the switching member and the at least one vent hole are annularly rotatably sleeved Having at least one snorkel ring; when the switching member is in the first position, the at least one air guiding groove communicates with the at least one venting hole to communicate the second plenum with the outside; when the switching member is in the second position, the The at least one closing portion closes the at least one vent hole and abuts the at least one stagnation ring to isolate the second air chamber from the outside. The variable pressure pump according to claim 1, wherein the outer circumference of the switching member faces at least one air guiding groove and at least one high pressure indicator, and the outer circumference of the switching member faces at least one closed portion. A high volume indicator. The variable pressure pump of claim 1, wherein the first cylinder has a first end and a second end, the first air tube has a first end and a second end, the connecting device a head and a nozzle valve are coupled to the first end of the first cylinder and the first end of the first air tube, and the second air tube is axially movably disposed in the air passage, the nozzle A valve is coupled to one end of the second air tube and communicates with the second air tube. The variable pressure pump of claim 3, wherein the second air tube is made of a flexible material, and the air nozzle valve is detachably coupled to the head. The variable pressure pump of claim 4, wherein the second cylinder has a first end and a second end, the connecting member being coupled to the second end of the second cylinder, the piston set comprising a first piston and a second piston, the first piston is disposed at the first end of the second cylinder and is axially movable relative to the first air chamber with the first air tube as an axis, the second piston is disposed at The second end of the first air tube is movable in the axial direction relative to the second air chamber corresponding to the movement of the second cylinder relative to the first cylinder. The variable pressure pump of claim 5, further comprising a one-way device comprising a first one-way valve group and a second one-way valve group, the first one-way valve a valve block is disposed at the first end of the first air pipe to allow air to enter the air passage from the first air chamber unidirectionally, and the second one-way valve group is disposed on the second piston to allow air to be unidirectionally The second air chamber enters the air passage. The variable pressure pump according to any one of claims 3 to 6, further comprising a grip pivotally connected to the connecting member, the grip having a pivot groove, the pivot slot being selected Abutting the switch. The variable pressure pump according to claim 7, wherein the second end of the first cylinder is provided with an outer cover, the outer cover having at least one air filling hole and a first fastening portion, the at least one supplement The air hole communicates with the first air chamber, and the pivot slot has a second fastening portion, and the second fastening portion selectively buckles the first fastening portion. The variable pressure pump according to any one of claims 3 to 6, further comprising a pressure sensing device, the head having a receiving groove, the receiving groove communicating with the air passage, the feeling of pressure The measuring device is disposed in the receiving slot.