TWI671466B - Variable pressure air pump - Google Patents

Abstract

A variable-pressure pump includes a base, a first cylinder, a second cylinder, an air pipe, a handle, and a venting device. The first cylinder and the trachea unidirectionally communicate with the air passage of the base. The second cylinder is movably connected to the first cylinder and is provided with a first piston. The air pipe is located in the second cylinder and penetrates the first piston, and the air pipe is provided with a second piston. The grip is connected to one end of the second cylinder. The venting device includes a switching member and a venting valve group. The switching member is rotatably disposed on the receiving portion of the handle and abuts the venting valve group. The venting valve group is disposed in the through hole of the handle and can move relative to the through hole. The second cylinder Selective communication with the outside world through the through hole causes the second piston to selectively perform work on the air in the second cylinder to achieve the purpose of variable pressure.

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. 524274, it discloses a pump with a high pressure and large air output. The inner and outer cylinders are arranged on the base and interposed between the inner and outer cylinders. The hollow air pump between the outer cylinder, one-way air inlet valve between the air piston at the bottom of the air pump and the inner and outer cylinder, one-way air inlet between the inner side of the air pump and the fixed piston on the top The valve is provided with one-way valves at the upper and lower ends of the inner cylinder. Channels extending from the inner cylinder and the outer cylinder to the air outlet are provided in the base, and one-way valves are provided in each channel. An adjusting component that can control the opening and closing of the channel, so that the pump can be quickly inflated with a large amount of air, and can also cooperate with the control of the adjusting component to output high-pressure gas. However, the adjustment component of the above patent is provided on the base, so that it is not only difficult for the user to switch, but also difficult to observe where the adjustment component is currently located, and it is easy to accidentally touch the adjustment component when inflating, so it is necessary to improve it.

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

The variable-pressure inflator provided by the present invention includes a base, a first cylinder, a second cylinder, a trachea, a grip, a venting device, and a catheter. The base has an airway. The first cylinder is fixed to the base and communicates with the airway unidirectionally. The second cylinder is axially movably connected to the first cylinder, and one end of the second cylinder is provided with a first piston adapted to compress air in the first cylinder. The trachea is located in the second cylinder and penetrates the first piston. The trachea communicates with the second cylinder and unidirectionally connects the airway. One end of the trachea is fixed to the base, and the other end of the trachea is provided with a second piston adapted to compress the second Air in the cylinder. The grip is connected to an end of the second cylinder that is different from the first piston. The grip has a receiving portion and a through hole, the receiving portion communicates with the through hole and the outside, and the through hole selectively communicates with the second cylinder. The venting device includes a switching member and a venting valve group. The switching member is rotatably disposed in the accommodation portion and abuts the venting valve group. The venting valve group is disposed in the through hole and can be moved by the switching member relative to the through hole, causing the second The cylinder is selectively in communication with the outside world. The catheter is fixed to the base and communicates with the airway, and the catheter is suitable for connecting to be inflated.

In an embodiment of the present invention, the switching member has a first positioning portion and a straight portion, and the first positioning portion and the straight portion can selectively contact the vent valve group as the switching member rotates relative to the receiving portion. There is a height difference between the positioning portion and the straight portion. When the first positioning portion abuts the vent valve group, the vent valve group closes the through hole, so that the second cylinder cannot communicate with the accommodation portion. When the flat portion abuts the vent valve group, the vent valve group moves relative to the through hole to generate a gap, which causes the second cylinder, the through hole, the accommodation portion, and the outside to communicate with each other.

In an embodiment of the present invention, the vent valve group includes a closing member and a first elastic member. The closure is movably disposed in the through hole, one end of the closure is provided with a closure portion, and the other end of the closure is provided with an abutment portion. The closing portion can close the through hole, and the abutting portion selectively abuts the first positioning portion or the straight portion. The first elastic member is sleeved on the closure member and can bias the closure member. When the first positioning portion abuts the abutting portion, the closing portion closes the through hole. When the flat portion abuts the abutting portion, the closing member moves relative to the through hole and compresses the first elastic member to generate a gap between the closing portion and the through hole.

In an embodiment of the invention, the through hole includes a first section, a second section, and a third section. The first segment communicates with the second cylinder, the second segment communicates with the first segment and the third segment, and the third segment communicates with the accommodation portion. The pore diameter of the first section is larger than the pore diameter of the second section and the third section, and the pore diameter of the third section is larger than that of the second section. A first stage portion is formed between the first and second segments, and the closing portion selectively abuts the first stage portion to close the through hole. A second stage portion is formed between the second and third segments, and the opposite ends of the first elastic member abut on the abutting portion and the second stage portion, respectively.

In one embodiment of the present invention, the switch includes a knob and a dial. The knob has a toggle portion formed on an outer peripheral edge of the knob. The turntable is connected to the knob and can rotate relative to the receiving portion in synchronization with the knob. The first positioning portion and the straight portion are formed on the turntable. The deflation device further includes a fixing part, which is threaded through the knob and the turntable, is connected to the fastener, and is fixed to the handle.

In an embodiment of the present invention, the handle has a receiving hole, and the extending direction of the receiving hole is parallel to the extending direction of the through hole. The turntable has a second positioning portion. The venting device further includes a top stopper set, which is disposed in the accommodation hole and topped between the handle and the second positioning portion.

In an embodiment of the present invention, the top stop set includes a top stop member, a second elastic member, and a leakage ring. The top stopper is abutted against the second positioning portion, and the opposite ends of the second elastic member are abutted against the leakage stopper and the grip, respectively. The stopper ring is located between the top stopper and the second elastic member.

In an embodiment of the invention, the first elastic member and the second elastic member are springs.

In an embodiment of the invention, the base is provided with a valve seat. The valve seat has a first channel and a second channel, the first channel communicates with the first cylinder and unidirectionally communicates with the airway, the second channel communicates with the airpipe and unidirectionally communicates with the airway, the first channel is provided with a first check valve, and the second channel The channel is provided with a second check valve.

In an embodiment of the present invention, the base is provided with a pressure gauge connected to the airway.

Based on the above, the variable-pressure pump provided by the above embodiment of the present invention can be rotated relative to the accommodating part of the handle, so that the through hole selectively communicates with the second cylinder, so the second piston can be selectively Ground work is performed on the air in the second cylinder to achieve the purpose of variable pressure.

In addition, the switch is provided on the handle, which allows the user to easily switch, and can clearly identify the current position of the switch. There is no chance of accidentally touching the switch when pumping up.

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. 3 to 7 are schematic cross-sectional views of the variable-pressure pump of FIG. 1. Please refer to FIGS. 1 to 7. The variable-pressure pump of this embodiment includes a base 10, a first cylinder 20, a second cylinder 30, a trachea 40, a grip 50, a venting device 60, and a catheter. 70 and a pressure gauge 80.

The base 10 can be placed on a plane and has an air channel 11. The base 10 is provided with a valve seat 12. The valve seat 12 has a first passage 121 and a second passage 122. The first passage 121 communicates with the first cylinder 20 and unidirectionally communicates with the air passage 11. The second passage 122 communicates with the air duct 40 and unidirectionally communicates with the air passage 11. The first passage 121 is provided with a first check valve 22, and the second passage 122 is provided with a second check valve 32. The first cylinder 20 is fixed to the base 10 and communicates with the air passage 11 unidirectionally through a first check valve 22. The second cylinder 30 is axially movably connected to the first cylinder 20. A first piston 21 is provided at one end of the second cylinder 30 to be suitable for compressing the air in the first cylinder 20. The air pipe 40 is located in the second cylinder 30 and penetrates the first piston 21. The air pipe 40 communicates with the second cylinder 30 and unidirectionally communicates with the air passage 11 through the second check valve 32. One end of the air pipe 40 is fixed to the base 10, and the other end of the air pipe 40 is provided with a second piston 31 to be suitable for compressing the air in the second cylinder 30. The catheter 70 is fixed to the base 10 and communicates with the airway 11. The catheter 70 is suitable for connecting an object to be inflated (not shown). A pressure gauge 80 is disposed on the base 10 and communicates with the air passage 11 to measure the air pressure.

The grip 50 is connected to an end of the second cylinder 30 different from the first piston 21. The handle 50 has an accommodating portion 51, a through hole 52 and at least one accommodating hole 53. The accommodating portion 51 is formed on the top surface of the handle 50 and communicates the through hole 52 with the outside. The through hole 52 selectively communicates with the second cylinder 30. The through hole 52 includes a first section 521, a second section 522, and a third section 523. The first section 521 communicates with the second cylinder 30, and the second section 522 communicates with the first cylinder 30. The first section 521 is connected to the third section 523, and the third section 523 communicates with the accommodation portion 51. The aperture of the first segment 521 is larger than the aperture of the second segment 522 and the aperture of the third segment 523, and the aperture of the third segment 523 is larger than the aperture of the second segment 522 so that the first segment 521 and the second segment 522 are formed. A first-class section 524 is formed between the second section 522 and the third section 523. The extending direction of the receiving hole 53 is parallel to the extending direction of the through hole 52.

The venting device 60 includes a switching member 61, a venting valve group 62, a fixing member 63, a fastener 64, and at least one top stop group 65. The switching member 61 is rotatably disposed on the accommodating portion 51 and abuts the vent valve group 62, that is, the switching member 61 can rotate relative to the accommodating portion 51 and change between the first position and the second position. The switching member 61 includes a knob 611 and a dial 612. The knob 611 has a toggle portion 6111 formed on an outer periphery of the knob 611 and slightly protruding from the handle 50, so as to be suitable for a user to turn and turn the knob 611. The dial 612 is connected to the knob 611 and can rotate relative to the accommodating portion 51 in synchronization with the knob 611. At least one first positioning portion 6121, a flat portion 6122, and at least one second positioning portion 6123 are formed on the turntable 612. The first positioning portion 6121 and the straight portion 6122 can selectively contact the vent valve group 62 as the switching member 61 rotates relative to the accommodating portion 51. There is a height difference H between the first positioning portion 6121 and the straight portion 6122.

The vent valve group 62 is disposed in the through hole 52 and can be moved relative to the through hole 52 by being pushed by the switching member 61, so that the second cylinder 30 is selectively communicated with the outside world. The vent valve group 62 includes a closing member 621 and a first elastic member 622. The closing member 621 is movably disposed in the through hole 52. One end of the closing member 621 is provided with a closing portion 6211, and the other end of the closing member 621 is provided with an abutting portion 6212. The closing portion 6211 selectively abuts on the first stage portion 524 to close the through hole 52, and the abutting portion 6212 selectively abuts on the first positioning portion 6121 or the straight portion 6122. The first elastic member 622 is sleeved on the closing member 621, and the opposite ends of the first elastic member 622 are abutted on the abutting portion 6212 and the second-stage portion 525 to be able to bias the closing member 621.

The fixing member 63 is threaded through the knob 611 and the turntable 612 and is connected to a fastener 64 and fixed to the handle 50 so that the knob 611 and the turntable 612 can be rotated relative to the accommodating portion 51 in synchronization with the first and second positions Change between.

The top latching group 65 is disposed in the receiving hole 53 and topped between the handle 50 and the second positioning portion 6123. The top stopper 65 includes a top stopper 651, a second elastic member 652, and a leakage ring 653. The top stopper 651 is capable of selectively abutting the first positioning portion 6121 or the second positioning portion 6123 in response to the rotation of the knob 611 relative to the accommodating portion 51. The opposite ends of the second elastic member 652 abut against the anti-drain ring 653 and the handle 50, respectively. The anti-drain ring 653 is located between the top stopper 651 and the second elastic member 652. With the setting of the top stopper 65, the turntable 612 abuts on the knob 611, and provides a stable and fixed position between the knob 611 and the accommodating portion 51.

In this embodiment, the number of the accommodation hole 53, the first positioning portion 6121, the second positioning portion 6123, and the top stop group 65 can be two, and the first elastic member 622 and the second elastic member 652 can all be springs. .

Please refer to FIG. 4 and FIG. 5, when the switching member 61 is in the first position, the two top latch members 651 of the two top latch groups 65 abut against one of the two first positioning portions 6121 and the two second positioning portions 6123 respectively. One (as shown in FIG. 4), and the other first positioning portion 6121 of the two first positioning portions 6121 abuts against the abutting portion 6212 of the closing member 621, and the closing portion 6211 of the closing member 621 abuts against the first The step portion 524 closes the through hole 52, so that the second cylinder 30, the through hole 52, the accommodation portion 51, and the outside cannot communicate with each other. In other words, the second cylinder 30 is isolated from the outside, so when the second cylinder 30 moves axially relative to the first cylinder 20, both the first piston 21 and the second piston 31 can compress the inside of the first cylinder 20 and the second cylinder 30, respectively. Air, compressed air from the first cylinder 20 unidirectionally enters the air passage 11 via the first passage 121 of the valve seat 12, and compressed air from the second cylinder 30 unidirectionally passes through the air pipe 40 and the second passage 122 of the valve seat 12. After entering the airway 11, the compressed air after entering the airway 11 enters the object to be inflated through the duct 70 and measures the pressure value through the pressure gauge 80, respectively. Therefore, the first piston 21 and the second piston 31 perform work on the air in the first cylinder 20 and the second cylinder 30, respectively, thereby performing low-pressure and high-volume inflation.

Referring to FIGS. 6 and 7, the user can turn the dial 6111 of the knob 611 to rotate the knob 611 of the switch 61 and the turntable 612 relative to the accommodating portion 51 to switch from the first position to the second position. When the switch 61 is in the second position, the two top latches 651 of the two top latch groups 65 abut against the other second positioning portion 6123 of the two second positioning portions 6123 and the other of the two first positioning portions 6121. The first positioning portion 6121 (as shown in FIG. 6), and the flat portion 6122 abuts the abutting portion 6212 of the closing member 621. Because there is a height drop H between the first positioning portion 6121 and the straight portion 6122, the closing member 621 will move relative to the through hole 52 when pushed by the straight portion 6122 to compress the first elastic member 622 and generate a gap G, causing The second cylinder 30, the through hole 52, the accommodating portion 51, and the outside communicate with each other. In other words, the second cylinder 30 communicates with the outside world, so when the second cylinder 30 moves axially relative to the first cylinder 20, the second piston 31 cannot compress the air in the second cylinder 30, and only the first piston 21 can compress the first Air in the cylinder 20. The compressed air from the first cylinder 20 enters the air passage 11 unidirectionally through the first passage 121 of the valve seat 12. The compressed air after entering the air passage 11 enters the object to be inflated through the duct 70 and measures the pressure value through the pressure gauge 80. Therefore, only the first piston 21 performs work on the air in the first cylinder 20, thereby performing high-pressure low-volume inflation.

In summary, the variable pressure pump of this embodiment can be rotated between the first position and the second position by the switching member 61 being able to rotate relative to the accommodating portion 51 of the handle 50, and the through hole 52 of the handle 50 The second cylinder 30 is selectively communicated, so that the second cylinder 30 is selectively communicated with or isolated from the outside world, so the second piston 31 can selectively perform work on the air in the second cylinder 30 to achieve the purpose of variable pressure. That is, the user can choose high gas pressure inflation or high pressure inflation according to the use needs.

In addition, since the switching member 61 is rotatably disposed on the handle 50, it is easy for a user to operate the switching, and the position of the current switching member 61 can be clearly identified. Even when the pump is inflated, the switching member 61 is not accidentally touched.

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‧‧‧ base

11‧‧‧ airway

12‧‧‧Valve seat

121‧‧‧ first channel

122‧‧‧Second Channel

20‧‧‧ the first cylinder

21‧‧‧First Piston

22‧‧‧The first check valve

30‧‧‧Second cylinder

31‧‧‧Second Piston

32‧‧‧Second check valve

40‧‧‧ trachea

50‧‧‧ Grip

51‧‧‧accommodation department

52‧‧‧through hole

521‧‧‧ first paragraph

522‧‧‧paragraph 2

523‧‧‧ third paragraph

524‧‧‧First Class

525‧‧‧Second Class

53‧‧‧ Rongcon

60‧‧‧deflation device

61‧‧‧Switch

611‧‧‧ knob

6111‧‧‧Toggle

612‧‧‧Turntable

6121‧‧‧First positioning unit

6122‧‧‧Straight

6123‧‧‧Second positioning section

62‧‧‧Relief valve group

621‧‧‧ Closure

6211‧‧‧Closed

6212‧‧‧Abutment Department

622‧‧‧The first elastic member

63‧‧‧Fixed parts

64‧‧‧Fastener

65‧‧‧Top button group

651‧‧‧Top stop

652‧‧‧Second elastic member

653‧‧‧Anti-drain ring

70‧‧‧ catheter

80‧‧‧ pressure gauge

H‧‧‧Height drop

G‧‧‧ Clearance

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. 4 and 5 are schematic cross-sectional views of the variable-pressure pump of FIG. 1, showing that the switching member is located at a first position. 6 and 7 are schematic cross-sectional views of the variable-pressure pump of FIG. 1, showing that the switching member is located at the second position.

Claims (9)

A variable-pressure air pump includes: a base having an air passage; a first cylinder fixedly connected to the base and communicating with the air passage unidirectionally; a second cylinder axially movably connected to the first cylinder A first piston is provided at one end of the second cylinder so as to be suitable for compressing the air in the first cylinder. An air pipe is located in the second cylinder and penetrates the first piston. The air pipe communicates with the second cylinder and One-way communication with the airway, one end of the air pipe is fixed to the base, and the other end of the air pipe is provided with a second piston adapted to compress the air in the second cylinder, and a grip is connected to the second cylinder Different from one end of the first piston, the grip has an accommodating portion and a through hole, the accommodating portion communicates with the through hole and the outside, and the through hole selectively communicates with the second cylinder; a venting device includes a A switching member and a vent valve group, the switching member is rotatably disposed in the accommodating portion and has at least a first positioning portion and a straight portion, and the at least one first positioning portion and the straight portion follow the switching piece Rotate relative to the accommodating portion to selectively abut the An air valve group has a height drop between the at least one first positioning portion and the flat portion. The air valve group is disposed in the through hole and can be moved by the switching member relative to the through hole, causing the first The two cylinders are selectively communicated with the outside world. When the at least one first positioning portion abuts the vent valve group, the vent valve group closes the through hole, so that the second cylinder cannot communicate with the accommodation portion, and the flat portion When the aeration valve group abuts, the aeration valve group moves relative to the through hole to create a gap, so that the second cylinder, the through hole, the accommodation portion and the outside communicate with each other; and a duct is fixed to the base. And communicating with the airway, the catheter is suitable for connecting to be inflated. The variable-pressure pump according to claim 1, wherein the vent valve group includes a closure member and a first elastic member, the closure member is movably disposed in the through hole, and one end of the closure member is provided with a closure portion. And the other end of the closure is provided with an abutting portion, which can close the through hole, the abutting portion selectively abuts against the at least one first positioning portion or the flat portion, the first elasticity A piece is sleeved on the closure member and can bias the closure member; when the at least one first positioning portion abuts the abutment portion, the closure portion closes the through hole; when the flat portion abuts the abutment portion, The closing member moves relative to the through hole and compresses the first elastic member to generate the gap between the closing portion and the through hole. The variable-pressure pump according to claim 2, wherein the through hole includes a first section, a second section, and a third section, the first section communicates with the second cylinder, and the second section communicates with the first section One section is connected to the third section, and the third section communicates with the accommodating part. The aperture of the first section is larger than the aperture of the second section and the aperture of the third section, and the aperture of the third section is larger than the second section. The aperture of the segment is formed between the first segment and the second segment by a first-level portion, and the closing portion selectively abuts the first-level portion to be able to close the through hole. The second segment and the first portion A second step portion is formed between the three segments, and opposite ends of the first elastic member abut on the abutment portion and the second step portion, respectively. The variable-pressure pump according to claim 2, wherein the switch includes a knob and a turntable, the knob has a toggle portion formed on an outer periphery of the knob, and the dial is connected to the knob And can rotate in synchronization with the knob relative to the accommodating part. The at least one first positioning part and the straight part are formed on the turntable. The venting device further includes a fixing piece, the fixing piece is passed through the knob and the turntable. And is connected to a fastener and fixed to the handle. The variable-pressure pump according to claim 4, wherein the grip has at least one accommodation hole, an extension direction of the at least one accommodation hole is parallel to an extension direction of the through hole, and the turntable has at least a second positioning portion, The deflation device further includes at least one push-button group, the at least one push-button group is disposed in the at least one receiving hole and pushed between the handle and the at least one second positioning portion. The variable-pressure pump according to claim 5, wherein the at least one top stopper includes a top stopper, a second elastic member, and a leakage ring, and the top stopper selectively abuts the at least one The first positioning portion or the at least one second positioning portion, the opposite ends of the second elastic member abut against the anti-drain ring and the grip respectively, and the anti-drain ring is located at the top stopper and the second elastic member between. The variable pressure pump according to claim 6, wherein the first elastic member and the second elastic member are springs. The variable pressure pump according to claim 1, wherein the base is provided with a valve seat, the valve seat has a first passage and a second passage, the first passage communicates with the first cylinder and unidirectionally communicates with the In the air passage, the second passage communicates with the air pipe and unidirectionally communicates with the air passage. The first passage is provided with a first check valve, and the second passage is provided with a second check valve. The variable-pressure pump according to claim 1, wherein the base is provided with a pressure gauge in communication with the airway.