TWI720770B - An inflator with variable pressures - Google Patents

Abstract

An inflator with variable pressures of the present invention includes a body and a switch. The body includes a nozzle head, a communication pipe, a first cylinder and a second cylinder. An end of the communication pipe is connected to the nozzle head. The first cylinder is sleeved on the communication pipe. An end of the first cylinder, which is opposite to the nozzle head, is provided with a first end cover. The second cylinder sleeve is sleeved on the first cylinder. The switch is disposed outside of the communication pipe. The switch can be rotated relative to the nozzle head between a first position and a second position. The switch is fixedly connected to an end of the second cylinder which is adjacent to the nozzle head. The second cylinder can rotate synchronously with the switch. The inflator can be easily and quickly switched between a high pressure mode and a high volume of air mode through the above structure.

Description

Variable pressure pump

The present invention mainly discloses a pump, especially a variable pressure pump.

Please refer to the "Variable Pressure Inflator" patent case of my country Patent No. I645111, which is a variable pressure inflator that includes a first cylinder, a second cylinder, a first air pipe, a piston group, a connecting device, and a venting device. The first cylinder, the second cylinder and the first air pipe are coaxially arranged and can move relative to the axial direction. The piston group can compress the air in the first cylinder and selectively compress the air in the second cylinder. The connecting device is arranged on the first cylinder and is suitable for connecting the object to be inflated. The air relief device includes a connecting piece and a switching piece. The connecting piece is connected to the second cylinder and has a bleed hole communicating with the second cylinder. The switching piece is connected to the connecting piece and has an air guiding groove that selectively communicates with the bleed hole and the outside.

The reason why the pump is equipped with a variable pressure function is to allow the user to fill the tire with air first, and then increase the pressure output, so that the user can drive the tire to the default in a time-saving and labor-saving way In the process of pumping, it is necessary to switch the mode of the pump. However, the above-mentioned pump needs to use the switch to switch the output mode of the pump. The size of the switch is small and the setting position is also hidden. It is not convenient for the user to operate and switch the mode.

In view of the deficiencies of the above-mentioned conventional structure, the present inventor designed a variable pressure pump, which can overcome all the shortcomings of the above-mentioned conventional structure.

The main purpose of the variable pressure pump of the present invention is to provide a pump including a body and a switch. The body includes a tuyere head, a connecting pipe, a first cylinder and a second cylinder. One end of the communicating pipe is connected to the tuyere head, the communicating pipe is provided with a first piston at one end opposite to the tuyere head, the first cylinder sleeve is arranged outside the communicating pipe, and the first piston contacts the first cylinder On the inner periphery of the first cylinder, one end of the first cylinder adjacent to the tuyere head is provided with a second piston, the end of the first cylinder opposite to the tuyere head is provided with a first end cover, and the second cylinder sleeve is provided on the Outside the first cylinder, the second piston contacts the outer periphery of the communicating pipe and the inner periphery of the second cylinder. The end of the second cylinder opposite to the tuyere is provided with a second end cover, the second end cover Contacting the outer periphery of the first cylinder, the switch is sleeved outside the communicating pipe, the switch can rotate relative to the tuyere between the first position and the second position, and the switch is fixedly connected to the second The air cylinder is adjacent to one end of the tuyere head, the second air cylinder can rotate synchronously with the switch, and the air pump can be easily and quickly switched to the high pressure mode or the air volume mode through the above-mentioned structure.

The switch is provided with a first air groove and a second air groove. One end of the first air groove communicates with the inner space of the second cylinder, and the first air groove communicates with the outside opposite to the end of the second cylinder. The first air groove is provided with a first one-way valve, the first one-way valve is only for air flow from the outside to the second cylinder, one end of the second air groove is connected to the internal space of the second cylinder, the switch In the first position, the second air groove is connected to the outside with an end opposite to the second cylinder, and when the switch is in the second position, the second air groove is closed opposite to the second cylinder.

The first air groove is recessed on the outer periphery of the switch, the first check valve is ring-shaped, and the first check valve is sleeved on the outer periphery of the switch and contacts the inner periphery of the second cylinder.

A first mark and a second mark are arranged on the outer periphery of the switcher. One end of the switcher adjacent to the tuyere head is inserted into the tuyere head. The tuyere head is provided with a display slot. The switcher When in the first position, the first mark corresponds to the display slot, the nozzle head covers the second mark, when the switch is in the second position, the second mark corresponds to the display slot, and the nozzle head covers The first mark.

The body includes a first positioning member, the first positioning member is fixedly connected to the nozzle head, the first positioning member is recessed with a first positioning groove and a second positioning groove, and the switch is adjacent to the nozzle One side of the head is recessed with a first accommodating groove, the first accommodating groove is provided with a first elastic member and a first latching member in sequence from the inside to the outside, and the first elastic member pushes the first card When the switch is in the first position, the first detent is inserted into the first positioning slot, and when the switch is in the second position, the first detent is inserted into the second Locating slot.

The body includes a second positioning member, the second positioning member is fixedly connected to the nozzle head, the first positioning member and the second positioning member are arranged on two different sides of the communicating tube, and the second positioning member is concave A third positioning groove and a fourth positioning groove are provided. The switch is recessed with a second receiving groove on one side adjacent to the tuyere head. The second receiving groove is sequentially provided with a second receiving groove from the inside to the outside. An elastic member and a second locking member, the second elastic member pushes the second locking member, when the switch is in the first position, the second locking member is inserted into the third positioning slot, the When the switch is in the second position, the second latch is inserted into the fourth positioning slot.

The communicating tube is recessed along its radial outer periphery with a clamping groove, and a fastener is buckled in the clamping groove, and the fastener abuts against the side of the switch opposite to the tuyere head.

The inner space of the first cylinder is provided with a first zone and a second zone. The first zone is arranged on the side of the first piston adjacent to the tuyere head, and the second zone is arranged on the opposite side of the first piston. On one side of the tuyere head, the first piston is only for air flow from the first zone to the second zone, and a check valve is provided between the communicating pipe and the first piston, and the check valve is for air flow only The second zone enters the internal space of the communication pipe via the first piston. The internal space of the second cylinder is provided with a third zone and a fourth zone. The third zone is arranged on the second piston adjacent to the wind. On one side of the nozzle head, the fourth zone is arranged on the side of the second piston opposite to the tuyere head, the second piston blocks the third zone and the fourth zone, the first air groove and the second piston The two air grooves are respectively connected to the third zone, and the second end cover is only for air flow from the outside to the fourth zone.

The first end cover is connected to a side adjacent to the tuyere head with a holding member, the holding member is tubular, and the holding member can be sleeved on the outer periphery of the second cylinder.

Other purposes, advantages, and novelty of the present invention will be more apparent from the following detailed description and related drawings.

Regarding the technology, means and effects adopted by the present invention, a preferred embodiment is given below in conjunction with the drawings. This is for illustrative purposes only, and is not limited by this structure in the patent application.

1 to 5, which are the three-dimensional appearance view, the three-dimensional exploded view and the cross-sectional structure view of the variable pressure pump of the present invention. The pump 10 of the present invention includes a body 20 and a switch 30; among them:

The body 20 includes a tuyere head 21, a communicating pipe 22, a first cylinder 23, and a second cylinder 24. One end of the communicating pipe 22 is connected to the tuyere head 21, and the communicating pipe 22 is opposite to the wind One end of the nozzle head 21 is provided with a first piston 221, the first cylinder 23 is sleeved outside the communicating tube 22, the first piston 221 contacts the inner periphery of the first cylinder 23, and the first cylinder 23 is adjacent to the wind One end of the nozzle head 21 is provided with a second piston 231, the first cylinder 23 is provided with a first end cover 232 at one end opposite to the nozzle head 21, and the second cylinder 24 is sleeved outside the first cylinder 23 The second piston 231 contacts the outer periphery of the communicating pipe 22 and the inner periphery of the second cylinder 24. The second cylinder 24 is provided with a second end cover 241 at one end opposite to the tuyere head 21. The end cover 241 contacts the outer periphery of the first cylinder 23.

The switch 30 is sleeved outside the communicating tube 22, the switch 30 can rotate relative to the nozzle head 21 between a first position and a second position, and the switch 30 is fixedly connected to the second cylinder 24 adjacent to the At one end of the nozzle head 21, the second cylinder 24 can rotate synchronously with the switch 30.

Please continue to refer to FIGS. 5 to 11, which are the use state diagram of the variable pressure pump switch in the first position, the three-dimensional appearance view, the cross-sectional structure diagram, and the use state diagram of the switch in the second position of the present invention. The switch 30 is provided with a first air groove 31 and a second air groove 32. One end of the first air groove 31 communicates with the internal space of the second cylinder 24, and the first air groove 31 is opposite to the second cylinder One end of 24 is connected to the outside. The first air groove 31 is provided with a first check valve 311. The first check valve 311 is only for air flow from the outside to the second cylinder 24. One end of the second air groove 32 Connected to the internal space of the second cylinder 24, when the switch 30 is in the first position, the second air groove 32 is connected to the outside opposite to the end of the second cylinder 24, and when the switch 30 is in the second position, The second air groove 32 is closed opposite to one end of the second cylinder 24.

The first air groove 31 is recessed on the outer periphery of the switch 30, the first check valve 311 is ring-shaped, and the first check valve 311 is sleeved on the outer periphery of the switch 30 and contacts the second The inner periphery of the cylinder 24.

The outer periphery of the switch 30 is provided with a first mark 33 and a second mark 34. One end of the switch 30 adjacent to the tuyere head 21 is inserted into the tuyere head 21, and the tuyere head 21 is provided with A display slot 211. When the switch 30 is in the first position, the first mark 33 corresponds to the display slot 211, and the nozzle head 21 covers the second mark 34. When the switch 30 is in the second position, The second mark 34 corresponds to the display slot 211, and the nozzle head 21 covers the first mark 33.

The body 20 includes a first positioning member 25 fixedly connected to the nozzle head 21, and the first positioning member 25 is recessed with a first positioning groove 251 and a second positioning groove 252, One side of the switch 30 adjacent to the nozzle head 21 is recessed with a first accommodating groove 35, and the first accommodating groove 35 is sequentially provided with a first elastic member 351 and a first latching member from the inside to the outside. 352. The first elastic member 351 pushes the first latching member 352. When the switch 30 is in the first position, the first latching member 352 is inserted into the first positioning slot 251, and the switch 30 In the second position, the first latch 352 is inserted into the second positioning slot 252.

The body 20 includes a second positioning member 26, which is fixedly connected to the nozzle head 21, and the first positioning member 25 and the second positioning member 26 are arranged on different sides of the communicating tube 22 , The second positioning member 26 is recessed with a third positioning slot 261 and a fourth positioning slot 262, the switch 30 is recessed with a second receiving slot 36 on one side adjacent to the nozzle head 21, the second The accommodating slot 36 is sequentially provided with a second elastic member 361 and a second latching member 362 from the inside to the outside. The second elastic member 361 pushes the second latching member 362, and the switch 30 is positioned in the first In the position, the second locking member 362 is inserted into the third positioning slot 261. When the switch 30 is in the second position, the second locking member 362 is inserted into the fourth positioning slot 262.

The communicating tube 22 is recessed along its radial outer periphery with a slot 222, and a fastener 223 is buckled in the slot 222. The fastener 223 abuts against the switch 30 and is opposite to the nozzle head. 21 side.

The inner space of the first cylinder 23 is provided with a first zone 233 and a second zone 234. The first zone 233 is arranged on the side of the first piston 221 adjacent to the tuyere head 21, and the second zone 234 is arranged On the side of the first piston 221 opposite to the tuyere head 21, the first piston 221 is only for air flow from the first zone 233 to the second zone 234, between the communicating pipe 22 and the first piston 221 A check valve 224 is provided, and the check valve 224 only allows air flow from the second zone 234 to enter the internal space of the communication pipe 22 via the first piston 221. The inner space of the second cylinder 24 is provided with a third zone 242 and a fourth zone 243. The third zone 242 is arranged on the side of the second piston 231 adjacent to the tuyere head 21, and the fourth zone 243 is arranged On the side of the second piston 231 opposite to the nozzle head 21, the second piston 231 is only for air flow from the third zone 242 to the first zone 233 or from the fourth zone 243 to the first zone 233 The first air groove 31 and the second air groove 32 are respectively connected to the third zone 242, and the second end cover 241 is only for air flow from the outside to the fourth zone 243.

The first end cover 232 is connected to a side adjacent to the nozzle head 21 with a holding member 235, the holding member 235 is tubular, and the holding member 235 can be sleeved on the outer periphery of the second cylinder 24.

The pump 10 can be easily and quickly switched to the high pressure mode or the air volume mode through the above-mentioned structure. When the pump 10 is in use, the nozzle head 21 can be connected to the nozzle 90, and the switch 30 can be moved to the second position at the beginning of pumping. When the switch 30 is in the second position, In this state, the cylinder is compressed, and the air pump 10 can simultaneously blow the air in the second zone 234 and the third zone 242 into the air nozzle 90, and then move the switch 30 to the first position, and compress the cylinder in this state, The air in the third zone 242 will be directly discharged to the outside, and only the air in the second zone 234 can be injected into the air nozzle 90, because the user’s force is all used to compress the air in the second zone 234 to make the second zone 234 The air of 234 can form a high pressure, which can increase the air pressure that the pump 10 can output, because the pump 10 can drive the switch 30 between the first position and the second position by directly rotating the second cylinder 24 Mobile, easy to operate and able to switch modes quickly.

From the above, it can be concluded that the present invention has the following advantages:

1. The variable pressure pump of the present invention, wherein the pump includes a body and a switch, the body includes a tuyere head, a connecting pipe, a first cylinder and a second cylinder, the connecting pipe One end is connected to the tuyere head, one end of the communicating pipe opposite to the tuyere head is provided with a first piston, the first cylinder sleeve is arranged outside the communicating pipe, and the first piston contacts the inner periphery of the first cylinder , The first cylinder is provided with a second piston at one end adjacent to the tuyere head, the first cylinder is provided with a first end cover at the end opposite to the tuyere head, and the second cylinder sleeve is provided on the first cylinder In addition, the second piston contacts the outer periphery of the communicating pipe and the inner periphery of the second cylinder. The second cylinder is provided with a second end cover at one end opposite to the tuyere head, and the second end cover contacts the first end cover. On the outer periphery of a cylinder, the switch is sleeved outside the communicating tube, the switch can rotate relative to the tuyere head between a first position and a second position, and the switch is fixedly connected to the second cylinder adjacent to the At one end of the nozzle head, the second cylinder can rotate synchronously with the switch, and the pump can be easily and quickly switched to the high pressure mode or the air volume mode through the above-mentioned structure.

However, the above are only the preferred embodiments of the present invention. When they cannot be used to limit the scope of implementation of the present invention, all numerical changes or substitutions of equivalent elements or equivalents made in accordance with the scope of the patent application of the present invention are mentioned. Changes and modifications should still fall within the scope of the invention patent.

10: pump 20: body 21: wind mouth head 211: display slot 22: Connecting pipe 221: First Piston 222: card slot 223: Fastener 224: check valve 23: first cylinder 231: Second Piston 232: first end cap 233: District One 234: Second District 235: Grip 24: second cylinder 241: second end cap 242: The Third District 243: District Four 25: The first positioning piece 251: first positioning slot 252: second positioning slot 26: The second positioning piece 261: third positioning slot 262: fourth positioning slot 30: switcher 31: The first air tank 311: The first one-way valve 32: second air tank 33: first mark 34: second mark 35: first container 351: The first elastic part 352: The first card switch 36: second container 361: second elastic part 362: Second Card 90: Gas Mouth

Figure 1: is a perspective view of the variable pressure pump of the present invention. Figure 2: is a three-dimensional exploded view of the variable pressure pump of the present invention. Figure 3 is a cross-sectional structure diagram of the variable pressure pump of the present invention. Fig. 4: is another view of the sectional structure of the variable pressure pump of the present invention. Figure 5: is a cross-sectional structural view of the variable pressure pump switch of the present invention in the first position. Fig. 6 is a diagram of the use state of the variable pressure pump switch of the present invention when the cylinder is pulled out when the switch is in the first position. Fig. 7 is a diagram showing the use state of the variable pressure pump switch of the present invention when it is in the first position and the compressed air cylinder. Fig. 8 is a perspective view of the variable pressure pump switch of the present invention when it is in the second position. Fig. 9 is a cross-sectional structural view of the variable pressure pump switch of the present invention in the second position. Fig. 10 is a diagram of the use state of the variable pressure pump switch of the present invention when the cylinder is pulled out when the switch is in the second position. Fig. 11 is a diagram showing the use state of the variable pressure pump switch of the present invention when the cylinder is compressed in the second position.

10: pump

20: body

21: wind mouth head

211: display slot

235: Grip

24: second cylinder

33: first mark

Claims (7)

A variable pressure pump includes: a body including a tuyere head, a communicating pipe, a first cylinder and a second cylinder, one end of the communicating pipe is connected to the tuyere head, and A first piston is provided at one end of the communicating pipe opposite to the tuyere head, the first cylinder sleeve is arranged outside the communicating pipe, the first piston contacts the inner periphery of the first cylinder, and the first cylinder is adjacent to the tuyere One end of the head is provided with a second piston, the first cylinder is provided with a first end cover at the end opposite to the tuyere head, the second cylinder sleeve is provided outside the first cylinder, and the second piston contacts the communicating The outer periphery of the tube and the inner periphery of the second cylinder, the second cylinder is provided with a second end cover at one end opposite to the tuyere head, and the second end cover contacts the outer periphery of the first cylinder; a switch , The switch is sleeved outside the communicating tube, the switch can rotate relative to the tuyere head between the first position and the second position, and the switch is fixedly connected to an end of the second cylinder adjacent to the tuyere head , The second cylinder can rotate synchronously with the switch, the switch is provided with a first air groove and a second air groove, the first air groove is recessed on the outer periphery of the switch, the first air groove One end of the second cylinder communicates with the internal space of the second cylinder, the first air groove is opposite to the end of the second cylinder communicates with the outside, the first air groove is provided with a first one-way valve, the first one-way valve is ring-shaped The first check valve is sleeved on the outer periphery of the switch and contacts the inner periphery of the second cylinder. The first check valve is only for air flow from the outside to the second cylinder. One end communicates with the inner space of the second cylinder. When the switch is in the first position, the second air groove communicates with the outside opposite to the end of the second cylinder. When the switch is in the second position, the second air The groove is closed at one end opposite to the second cylinder. The variable pressure pump according to claim 1, wherein the outer periphery of the switch is provided with a first mark and a second mark, and one end of the switch adjacent to the nozzle head is inserted into the nozzle Inside the head, the nozzle head is provided with a display slot, when the switch is in the first position, the first mark corresponds to the display slot, the nozzle head covers the second mark, and the switch is in the second position At this time, the second mark corresponds to the display slot, and the tuyere head covers the first mark. The variable pressure pump according to claim 1, wherein the body includes a first positioning member, the first positioning member is fixedly connected to the nozzle head, and the first positioning member is recessed with a first positioning groove And a second positioning slot, the switch is recessed with a first receiving slot on one side adjacent to the tuyere head, and the first receiving slot is sequentially provided with a first elastic member and a first card from the inside to the outside A detent, the first elastic member pushes the first detent, when the switch is in the first position, the first detent is inserted into the first positioning slot, and the switch is in the second position At this time, the first latch is inserted into the second positioning slot. The variable pressure pump according to claim 3, wherein the body includes a second positioning member, the second positioning member is fixedly connected to the nozzle head, and the first positioning member and the second positioning member are disposed at On different two sides of the connecting pipe, the second positioning member is recessed with a third positioning groove and a fourth positioning groove, and a second receiving groove is recessed on one side of the switch adjacent to the tuyere head. A second elastic member and a second locking member are sequentially arranged from the inside to the outside of the two accommodating slots. The second elastic member pushes the second locking member. When the switch is in the first position, the first Two detents are inserted into the third positioning slot, and when the switch is in the second position, the second detent is inserted into the fourth positioning slot. The variable pressure pump according to claim 1, wherein the communicating tube is recessed with a groove along its radial outer periphery, and a fastener is buckled in the groove, and the fastener abuts against the The switch is opposite to the side of the nozzle head. The variable pressure pump according to claim 1, wherein the inner space of the first cylinder is provided with a first zone and a second zone, and the first zone is provided at a portion of the first piston adjacent to the tuyere head Side, the second area is arranged on the side of the first piston opposite to the tuyere head, and the first piston is only for gas The flow flows from the first zone to the second zone. A check valve is arranged between the communicating pipe and the first piston. The check valve only allows the flow of air to enter the communicating pipe from the second zone via the first piston. The inner space of the second cylinder is provided with a third zone and a fourth zone, the third zone is arranged on the side of the second piston adjacent to the tuyere head, and the fourth zone is arranged on the first The two pistons are opposite to the side of the tuyere head, the second piston is only for air flow from the third zone to the first zone or from the fourth zone to the first zone, the first air groove and the second The air grooves are respectively connected to the third zone, and the second end cover is only for air flow from the outside to the fourth zone. The variable pressure pump according to claim 1, wherein a holding member is connected to the side of the first end cap adjacent to the nozzle head, the holding member is tubular, and the holding member can be sleeved on the The outer periphery of the second cylinder.

Images