TW202016432A - Variable pressure air pump - Google Patents

Abstract

A variable pressure air pump, includes a base, a first cylinder, a second cylinder, a air tube, a handle, and an air escape device. The first cylinder and the air tube are unidirectionally interconnected with a channel of the base. The second cylinder is movably connected to the first cylinder and is provided with a first piston. The air tube is disposed in the second cylinder and inserts through the first piston. The air tube is provided with a second piston. The handle is mounted at an end of the second cylinder. The air escape device includes a switcher and an escape valve assembly. The switcher is rotatably mounted to a recess of the handle and abuts the escape valve assembly. The escape valve assembly is movably mounted in a through hole of the handle to cause the second cylinder selectively communicates external environment via the through hole. Thus, the second piston 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 improvements of the existing pumps are all focused on improving the inflation efficiency, but no matter how the pumps are improved, the cross-sectional area of the cylinder is inversely proportional to the pressure, so that both the inflation rate and the inflation effect cannot be considered. In order to achieve the conversion design of the pump that can output high air volume or high air pressure, such as the Chinese Patent No. 524274, it discloses a high-pressure large air pump, which is provided on the base with inner and outer cylinders and between 1. The hollow pumping rod between the outer cylinder, one-way intake valve between the pumping piston at the bottom of the pumping rod and the inner and outer cylinders, and one-way intake valve between the inner side of the pumping rod and the fixed piston on the top of the inner cylinder The valve is provided with a check valve relative to the upper and lower ends of the inner cylinder. The base is provided with channels that extend the inner cylinder and the outer cylinder to the air outlet. Each channel is provided with a check valve, and the channel corresponding to the outer cylinder is provided. An adjustment component that can control the opening and closing of the channel, whereby the pump can be quickly inflated with a large air output, and can also cooperate with the control of the adjustment component to output high-pressure gas. However, the adjustment component of the above patent is installed on the base, so that it is not easy for the user to switch, and it is not easy to observe the current position of the adjustment component, 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 pump, which can select high-pressure inflation or high-volume inflation.

The variable pressure pump provided by the present invention includes a base, a first cylinder, a second cylinder, a trachea, a grip, a deflation device and a catheter. The base has an airway. The first cylinder is fixed to the base and communicates with the air passage unidirectionally. The second cylinder is axially movably connected to the first cylinder, and a first piston is provided at one end of the second cylinder to be suitable for compressing the air in the first cylinder. The air pipe is located in the second cylinder and penetrates the first piston. The air pipe communicates with the second cylinder and unidirectionally communicates with the air passage. 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 suitable for compressing 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 an accommodating portion and a through hole, the accommodating portion communicates the through hole with the outside world, and the through hole selectively communicates with the second cylinder. The venting device includes a switching member and a vent valve group. The switching member is rotatably disposed in the accommodating portion and abuts against the vent valve group. The vent valve group is disposed in the through hole and can be moved relative to the through hole by the switching member, causing the second The cylinder selectively communicates with the outside world. The catheter is fixed to the base and communicates with the airway, and the catheter is suitable for connecting the object to be inflated.

In an embodiment of the present invention, the switching element has a first positioning portion and a straight portion. The first positioning portion and the straight portion can selectively abut against the exhaust valve group as the switching element rotates relative to the accommodating portion. The first There is a height drop between the positioning portion and the straight portion. When the first positioning portion abuts on the vent valve group, the vent valve group closes the through hole, so that the second cylinder cannot communicate with the accommodating portion. When the straight portion abuts on the bleed valve group, the bleed valve group moves relative to the through hole to create a gap, so that the second cylinder, the through hole, the accommodating portion and the outside communicate with each other.

In an embodiment of the invention, the bleed valve assembly includes a closing member and a first elastic member. The closing member is movably disposed in the through hole, one end of the closing member is provided with a closing portion, and the other end of the closing member is provided with an abutting 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 closing member and can bias the closing member. When the first positioning portion abuts the abutting portion, the closing portion closes the through hole. When the straight portion abuts the abutting portion, the closing member moves relative to the through hole and compresses the first elastic member to create a gap between the closing portion and the through hole.

In an embodiment of the invention, the through hole includes a first segment, a second segment, and a third segment. The first stage communicates with the second cylinder, the second stage communicates with the first stage and the third stage, and the third stage communicates with the accommodating portion. 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 aperture of the second section. A first class portion is formed between the first and second stages, and the closing portion selectively abuts the first class portion to close the through hole. A second stepped portion is formed between the second step and the third step, and the opposite ends of the first elastic member abut the abutting portion and the second stepped portion, respectively.

In an embodiment of the invention, the switch includes a knob and a turntable. The knob has a toggle portion formed on the outer periphery of the knob. The turntable is connected to the knob and can rotate relative to the accommodating 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 member, which is penetrated through the knob and the turntable and connected to the fastener to be fixed to the handle.

In an embodiment of the 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 deflation device further includes a jacking group, the jacking group is disposed in the receiving hole and is jacked between the handle and the second positioning portion.

In an embodiment of the present invention, the push button assembly includes a push button member, a second elastic member, and a stop ring. The jacking element abuts on the second positioning portion, and the opposite ends of the second elastic piece abut on the stop ring and the grip, respectively, and the stop ring is located between the jacking element and the second elastic element.

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 passage and a second passage, the first passage communicates with the first cylinder and communicates with the air passage in one direction, the second passage communicates with the air pipe and communicates with the air passage in one direction, the first passage is provided with a first check valve, the second The channel is provided with a second check valve.

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

Based on the above, the variable pressure pump provided by the above embodiment of the present invention can rotate relative to the accommodating portion of the handle by the switching member, so that the through hole selectively communicates with the second cylinder, so the second piston can be selectively Work on the air in the second cylinder to achieve the purpose of changing the pressure.

In addition, the switch is provided on the handle to allow the user to easily switch and to clearly identify the current position of the switch. There will also be no accidental touching of the switching piece when pumping up.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

FIG. 1 is a schematic view of the appearance of a variable-pressure pump according to an embodiment of the invention. FIG. 2 is an exploded schematic view of the variable pressure pump of FIG. 1. FIG. 3 to 7 are schematic cross-sectional views of the variable pressure pump of FIG. 1. Please refer to FIG. 1 to FIG. 7, the variable pressure pump of this embodiment includes a base 10, a first cylinder 20, a second cylinder 30, a trachea 40, a handle 50, a deflation device 60, a catheter 70 and a pressure gauge 80.

The base 10 can be placed on a flat surface and has an air passage 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 communicates with the air passage 11 in one direction. The second passage 122 communicates with the air pipe 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 the first check valve 22. The second cylinder 30 is movably connected to the first cylinder 20 in the axial direction. One end of the second cylinder 30 is provided with a first piston 21 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 suitable for compressing the air in the second cylinder 30. The duct 70 is fixed to the base 10 and communicates with the air passage 11. The duct 70 is suitable for connecting an object to be inflated (not shown). The pressure gauge 80 is installed 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 a receiving portion 51, a through hole 52 and at least one receiving hole 53. The accommodating portion 51 is formed on the top surface of the handle 50 and communicates with the through hole 52 and the outside. The through hole 52 selectively communicates with the second cylinder 30. The through hole 52 includes a first segment 521, a second segment 522, and a third segment 523. The first segment 521 communicates with the second cylinder 30, and the second segment 522 communicates with the first The first segment 521 and the third segment 523 communicate with the accommodating portion 51. The aperture of the first segment 521 is greater 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 greater 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, and a second class section 525 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 deflation device 60 includes a switching member 61, a deflation valve group 62, a fixing member 63, a fastener 64, and at least a top group 65. The switching element 61 is rotatably disposed in the accommodating portion 51 and abuts on the bleed valve group 62, that is, the switching element 61 can rotate relative to the accommodating portion 51 and change between the first position and the second position. The switch 61 includes a knob 611 and a turntable 612. The knob 611 has a toggle portion 6111 formed on the outer periphery of the knob 611 and slightly protruding from the grip 50 to be suitable for a user to turn the knob 611. The turntable 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 and a straight 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 abut against the bleed 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 bleed valve group 62 is disposed in the through hole 52 and can be pushed by the switching member 61 to move relative to the through hole 52, so that the second cylinder 30 selectively communicates with the outside. The relief valve assembly 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 a contact portion 6212. The closing portion 6211 selectively abuts the first step portion 524 to close the through hole 52, and the contact portion 6212 selectively abuts the first positioning portion 6121 or the straight portion 6122. The first elastic member 622 is sleeved on the closing member 621, and opposite ends of the first elastic member 622 abut the abutting portion 6212 and the second step portion 525 respectively, so that the closing member 621 can be biased.

The fixing member 63 penetrates the knob 611 and the turntable 612 and is connected to a fastener 64 to be fixed to the handle 50 so that the knob 611 and the turntable 612 can rotate relative to the accommodating portion 51 synchronously at the first position and the second position Change between.

The jack group 65 is disposed in the receiving hole 53 and is jacked between the handle 50 and the second positioning portion 6123. The jacking group 65 includes a jacking member 651, a second elastic member 652 and a stop ring 653. The pushing member 651 can selectively abut the first positioning portion 6121 or the second positioning portion 6123 according to the rotation of the knob 611 relative to the accommodating portion 51. The opposite ends of the second elastic member 652 abut the stop ring 653 and the handle 50 respectively. The anti-leak ring 653 is located between the stopper 651 and the second elastic member 652. With the setting of the jack set 65, the turntable 612 is constantly in contact with the knob 611, and provides a stable fixed position between the knob 611 and the accommodating portion 51.

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

4 and 5, when the switch 61 is in the first position, the two top catches 651 of the two top catches 65 abut 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 one of the two first positioning portions 6121 abuts the abutting portion 6212 of the closing member 621, and the closing portion 6211 of the closing member 621 abuts the first The step portion 524 closes the through hole 52, so that the second cylinder 30, the through hole 52, the accommodating portion 51 and the outside cannot communicate with each other. In other words, the second cylinder 30 is isolated from the outside world, 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 via the air pipe 40 and the second passage 122 of the valve seat 12 After entering the air passage 11, the compressed air after entering the air passage 11 respectively enters the object to be inflated through the duct 70 and measures the pressure value through the pressure gauge 80. Therefore, the first piston 21 and the second piston 31 work on the air in the first cylinder 20 and the second cylinder 30, respectively, thereby performing low-pressure high-air volume inflation.

Referring to FIGS. 6 and 7, the user can dial the dial portion 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 catches 651 of the two top catches 65 respectively abut the other second positioning part 6123 of the two second positioning parts 6123 and the other one of the two first positioning parts 6121 The first positioning portion 6121 (as shown in FIG. 6 ), and the straight portion 6122 abuts the abutting portion 6212 of the closure 621. Due to the height difference H between the first positioning portion 6121 and the straight portion 6122, when the straight portion 6122 is pushed by the straight portion 6122, the closing member 621 moves relative to the through hole 52 to compress the first elastic member 622 and generate a gap G, resulting in 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, 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, and 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, respectively. Therefore, only the first piston 21 performs work on the air in the first cylinder 20, thereby performing high-pressure low-air charge.

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 rotating relative to the accommodating portion 51 of the handle 50, and the through hole 52 of the handle 50 Selectively communicate with the second cylinder 30 to selectively communicate or isolate the second cylinder 30 from the outside world, so the second piston 31 can selectively work on the air in the second cylinder 30 to achieve the purpose of changing pressure, That is, the user can choose high-inflation inflation or high-pressure inflation according to usage requirements.

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

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person 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 subject to the scope defined in the appended patent application.

10: Base 11: Air passage 12: Valve seat 121: First passage 122: Second passage 20: First cylinder 21: First piston 22: First check valve 30: Second cylinder 31: Second piston 32: No. Second check valve 40: trachea 50: grip 51: accommodating part 52: through hole 521: first segment 522: second segment 523: third segment 524: first class department 525: second class department 53: capacity Hole 60: Air release device 61: Switching piece 611: Knob 6111: Toggle part 612: Turntable 6121: First positioning part 6122: Straight part 6123: Second positioning part 62: Vent valve group 621: Closure 6211: Closing part 6212: abutment portion 622: first elastic member 63: fixing member 64: fastener 65: jacking set 651: jacking piece 652: second elastic piece 653: stop ring 70: catheter 80: pressure gauge H: height Drop G: gap

FIG. 1 is a schematic view of the appearance of a variable-pressure pump according to an embodiment of the invention. FIG. 2 is an exploded schematic 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 in the first position. 6 and 7 are schematic cross-sectional views of the variable-pressure pump of FIG. 1, showing that the switching member is in the second position.

20: First cylinder

30: Second cylinder

31: Second Piston

50: Grip

51: Accommodation Department

52: through hole

53: Hole

60: Vent device

61: Switching piece

611: Knob

6111: Toggle

612: Turntable

6121: The first positioning part

6122: Straight

6123: Second positioning part

62: Vent valve block

621: closure

6211: Closed

6212: Abutment

622: The first elastic piece

63: fixings

64: Fastener

65: top switch group

651: top stop

652: Second elastic piece

653: Stop ring

Claims (10)

A variable-pressure pump includes: a base with an air passage; a first cylinder fixed to the base and unidirectionally communicating with the air passage; a second cylinder connected to the first cylinder movably in the axial direction , One end of the second cylinder is provided with a first piston 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 air passage, 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 suitable for compressing the air in the second cylinder, a grip is connected to the second cylinder Different from one end of the first piston, the handle has an accommodating portion and a through hole, the accommodating portion communicates the through hole with the outside world, and the through hole selectively communicates with the second cylinder; A switching member and a vent valve group, the switching member is rotatably disposed in the accommodating portion and abuts the vent valve group, the vent valve group is disposed in the through hole and can be pushed against the through hole by the switching member relative to the through hole The movement causes the second cylinder to selectively communicate with the outside world; and a conduit fixed to the base and communicating with the air passage, the conduit is suitable for connecting the object to be inflated. The variable pressure pump according to claim 1, wherein the switching element has at least a first positioning portion and a straight portion, and the at least one first positioning portion and the straight portion are opposite to the accommodating position with the switching element The portion rotates to be able to selectively abut the vent valve group, and there is a height drop between the at least one first positioning portion and the straight portion; when the at least one first positioning portion abuts the vent valve group, the vent The valve block closes the through hole, so that the second cylinder cannot communicate with the accommodating portion; when the straight portion abuts the bleed valve block, the bleed valve block moves relative to the through hole to create a gap, causing the second The cylinder, the through hole, the accommodating portion and the outside are in communication with each other. The variable pressure pump according to claim 2, wherein the bleed valve assembly includes a closing member and a first elastic member, the closing member is movably disposed in the through hole, and one end of the closing member is provided with a closing portion , And the other end of the closing member is provided with a contact portion, the closing portion can close the through hole, the contact portion selectively abuts the at least one first positioning portion or the straight portion, the first elastic The part is sleeved on the closing part and can bias the closing part; when the at least one first positioning part abuts the abutting part, the closing part closes the through hole; when the straight part abuts the abutting part, The closing member moves relative to the through hole and compresses the first elastic member to create the gap between the closing portion and the through hole. The variable pressure pump according to claim 3, wherein the through hole includes a first stage, a second stage, and a third stage, the first stage communicates with the second cylinder, and the second stage communicates with the first One section is connected to the third section, the third section is connected to the accommodating portion, 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 The aperture of the segment forms a first step between the first segment and the second segment, the closing portion selectively abuts against the first step to close the through hole, the second segment and the first segment A second class portion is formed between the three sections, and opposite ends of the first elastic member abut on the contact portion and the second class portion, respectively. The variable pressure pump according to claim 3, wherein the switching member includes a knob and a turntable, the knob has a toggle portion, the toggle portion is formed on the outer periphery of the knob, and the turntable is connected to the knob And can rotate synchronously with the knob relative to the accommodating portion, the at least one first positioning portion and the straight portion are formed on the turntable, the air deflating device further includes a fixing member, the fixing member is penetrated between the knob and the turntable And connected to a fastener and fixed to the handle. The variable pressure pump according to claim 5, wherein the handle has at least one receiving hole, the extending direction of the at least one receiving hole is parallel to the extending direction of the through hole, and the turntable has at least one second positioning portion, The air deflation device further includes at least one top switch group, the at least one top switch group is disposed in the at least one receiving hole and is pressed between the handle and the at least one second positioning portion. The variable pressure pump according to claim 6, wherein the at least one ejector set includes a ejector member, a second elastic member and a relief ring, and the ejector member selectively abuts on 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 on the stop ring and the handle respectively, the stop ring is located on the top stopper and the second elastic member between. The variable pressure pump according to claim 7, 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 having 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 communicating with the air passage.

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