TWM554512U - Two-way inflation pump - Google Patents

Abstract

A two-way pump that delivers gas to an object to be inflated and includes a cartridge holder, an aspiration mechanism, and a venting switch. The cartridge seat has a cylinder wall and a gas storage space, the cylinder wall has a venting hole, and the blasting mechanism has a piston unit that partitions the gas storage space into a first plenum and a second plenum And a piston rod that drives the piston unit to lift and lower, the first air chamber is in communication with the air leakage hole, and the air leakage switching seat has an adjusting member that uses rotation to close and open the air leakage hole, and the air pump can be inhaled in both directions. In addition, the pumping resistance of the pump can be controlled by a simple structure and operation to improve the convenience of use of the pump.

Description

Two-way pump

The present invention relates to an inflator, and more particularly to a two-way inflator that can achieve two-way airing during the movement of the piston rod to generate an atmosphere.

Generally, the pump can be roughly divided into a one-way pump and a two-way pump according to the way of pumping. The two-way pump can be pumped up during the process of ascending and descending the piston rod, so the air pumping amount is large, and is suitable for use in, for example, Air mattresses, life rafts, etc., which require a large amount of inflation, are also called atmospheric pumps because they have a higher air pumping capacity than a one-way air valve.

Although the two-way pump has a large inflation effect, when the two-way pump is in use, the sleeve is placed on the ground, and the user's feet need to be stepped on the two pedals extending radially from the sleeve. When the user presses down the piston rod, the force is smooth because the direction of the force is the same as the force of the cylinder seat under the ground, but when the piston rod is pulled up, due to the pulling force In contrast to the force that presses the base against the ground, the user may need to overcome the resistance to inject gas into the interior of the object to be inflated, in addition to the need to force the pedals, which is the initial stage of inflation. Since the pressure inside the object to be inflated is low, the operation is smooth, but when the pressure value inside the object to be inflated is close to saturation, the user must pay more force to overcome the resistance of rising air.

In order to overcome the problem that the two-way pump has a large resistance during the late pumping period, the EP 3 163 077 A1 patent discloses a two-way pump which is provided with a deflation device at the bottom of the pedestal, and the deflation device is used to close the air pump during the ascending process of the piston rod. The function can reduce the resistance of the pull-up at the later stage of pumping. Although the aforementioned invention patent can make the two-way pump more smooth in operation, the structure of the deflation device is quite complicated, and it is not only troublesome to maintain, but also the structure provided at the bottom of the pedestal can cause operational inconvenience.

It is an object of the present invention to provide a two-way pump that overcomes at least one of the disadvantages of the prior art.

The novel two-way pump delivers gas to an object to be inflated and includes a cylinder base, an air pumping mechanism, and a air venting switch. The cartridge holder has a cylinder wall and a gas storage space defined by the cylinder wall, the cylinder wall having a venting opening, the blasting mechanism having a piston rod having a first passage defining a first passage a first sleeve, and a second sleeve defining a second passage together with the first sleeve, the pumping mechanism further having a coupling with the piston rod and partitioning the gas storage space into a first gas a piston unit of the chamber and a second air chamber, the first air chamber being in communication with the air vent. The air venting switch seat has a rotatably mounted adjusting member mounted on the wall of the drum, the adjusting member having a closed air portion that closes the vent hole when the venting switch seat is in a two-way airing position, and a venting switch seat Open the venting groove of the venting hole when switching to a deflated position.

The utility model has the advantages that: the venting hole is arranged on the cylinder wall of the drum seat, and the venting opening of the venting switch seat is closed and opened, which can be achieved in a simple structure, convenient maintenance and convenient use. Control the purpose of the pumping resistance of the pump.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 1, 2, and 3, an embodiment of the two-way pump can send gas to an interior of the object to be inflated by an inflation tube 1, and includes a cylinder block 2 and a pumping mechanism. 3, and a ventilating switch seat 4 that is rotatably disposed outside the pedestal 2, and the venting switch seat 4 can be switched between a two-way airing position and a deflation position by rotating.

Referring to Figures 2, 4, and 5, the cartridge base 2 substantially includes an upright gas storage tube 21, and a cartridge cover 22 located above the gas storage tube 21 and screwed together, but in manufacturing, the cartridge holder 2 is not The composition of the gas storage tube 21 and the cylinder cover 22 is limited. After assembly, the cartridge base 2 has a cylinder wall 20, a gas storage space 23 defined by the cylinder wall 20, two pedals 24 extending horizontally outward from the cylinder wall 20 and adjacent to the bottom portion, and a first sealing ring. 25, and a second seal ring 26. The cylinder wall 20 has a surrounding wall portion 201 disposed about a central axis, a bottom wall portion 202 connecting the surrounding wall portion 201 and the pedal portion 24, and a casing wall portion 201 above and corresponding to the cylinder cover 22 The top wall portion 203. The surrounding wall portion 201 has a venting opening 204 adjacent to the top wall portion 203 and penetrating therethrough, and a radially protruding limiting projection 205. The limiting projection 205 is substantially equal to and spaced apart from the venting opening 204. 180 degrees, but the angle and height between the two are not limited by the examples. The top wall portion 203 has a through hole 206 on the central axis, and the first seal ring 25 surrounds the air vent 204, and the second seal ring 26 surrounds the through hole 206.

The air pumping mechanism 3 has a piston unit 31 located in the air storage space 23, a piston rod 33 passing through the through hole 206 of the cylinder base 2 and driving the piston unit 31 up and down, and a piston rod 33 coupled with the piston rod 33. The drive base 34, and a pressure gauge 35 mounted in the drive base 34 and capable of displaying a pressure value, are not described in detail since the improvement of the present invention is independent of the structure of the pressure gauge 35.

The piston unit 31 has a piston 311 that partitions the gas storage space 23 into a first gas chamber 231 and a second gas chamber 232, two first valve seats 312 installed in the piston 311, and two A second valve seat 313 is mounted in the piston 311. The piston 311 has a first valve chamber 314 and a second valve chamber 315 that communicate with the first air chamber 231 and the second air chamber 232. The first valve seat 312 and the second valve seat 313 are respectively used. The first valve chamber 314 and the second valve chamber 315 are opened and closed. Since the piston unit 31 is not an improvement point of the present invention, the detailed structure will not be described in detail.

The piston rod 33 has a first sleeve 331 which is disposed between the driving seat 34 and the piston 311, a second sleeve 332 which is disposed between the driving seat 34 and the piston 311, and a first sleeve 332. A sleeve 332 defines a first passage 333 that communicates with the object to be inflated through the drive seat 34, and a second passage 334 defined by the first sleeve 331 and the second sleeve 332. The first passage 333 is in communication with the first valve chamber 314, and the second passage 334 is in communication with the second valve chamber 315. The driving base 34 has a fitting portion 341 fitted over the piston rod 33, two handle portions 342 horizontally protruding by the fitting portion 341, and a communicating with the first passage 333 for the inflation tube 1 (see the figure). 1) The assembled air outlet tube portion 343.

Referring to Figures 2, 5 and 6, the venting switch seat 4 has a rotatably adjustable member 41 that fits over the periphery of the wall portion 201 of the wall 20 and corresponds to the venting opening 204, and at least one of the adjusting members 41. In the present embodiment, the venting switch seat 4 has two of the slidable blocks 42 and the adjusting member 41 does not surround the entire circumference of the surrounding wall portion 201. necessary. The adjusting member 41 has an inner annular surface 411 defining an annular space 410. The inner annular surface 411 has a limiting surface portion 412 corresponding to the limiting protrusion 205 of the socket 2, and a corresponding venting opening 204. a deflated face 413, a closed face portion 414 adjacent to the deflated face portion 413, an inclined face portion 415 obliquely connecting the closed face portion 414 and the deflated face portion 413, a deflation groove 416 corresponding to the deflated face portion 413 and the inclined face portion 415, and A limit rotation groove 417 corresponding to the face portion 412 is restricted.

The distance from the deflated surface portion 413 of the adjusting member 41 to a center of rotation of the annular space 410 is greater than the distance from the air-closing surface portion 414 to the center of rotation, and the distance between the inclined surface portion 415 and the center of rotation is adjacent to the distance One end of the air-closing surface portion 414 gradually increases toward one end of the air-dissipating surface portion 413, and the engagement of the rotation-restricting groove 417 with the rotation-limiting projection 205 is used to limit the rotation angle of the air-damping switch holder 4.

Referring to Figures 4, 5 and 7, in the embodiment, when the pump is to be inflated, the air switching seat 4 is first rotated, so that the air-closing surface portion 414 of the air switching seat 4 corresponds to and is pressed against the air-dissipating portion of the cylinder block 2. The outside of the hole 204, at this time, the venting switch seat 4 is in the two-way airing position, and then the two feet are stepped on the pedal 24 of the pedestal 2, and the handle portions of the driving seat 34 are respectively gripped by both hands 342, you can carry out the operation of inflation. When the user pulls up the pumping mechanism 3, the volume of the first air chamber 231 is reduced, and the volume of the second air chamber 232 is enlarged.

At this time, since the pressure of the first air chamber 231 is greater than the pressure of the second air chamber 232, the first valve seat 312 will move downward as indicated by the solid arrow in FIG. 4, and the external gas will be driven by the driving seat. A gap between the piston rod 33 and the piston rod 33 enters the second passage 334, and then enters the second gas chamber 232 through the second valve chamber 315 of the piston 311, and the gas in the compressed first gas chamber 231 is The first valve chamber 314 enters the first passage 333 and is finally sent out by the air outlet portion 343 of the driving seat 34. At this time, the gas located in the first air chamber 231 cannot be discharged from the air vent 204.

When the piston rod 33 drives the piston unit 31 to descend, the space of the second air chamber 232 becomes smaller, the space of the first air chamber 231 becomes larger, and the second valve seat 313 is as shown in the figure by pressure change. 4 rising as indicated by the dashed arrow. At this time, the gas located in the second gas chamber 232 enters the first passage 333 through the first valve chamber 314, and is finally discharged by the driving seat 34. The gas entering the second passage 334 enters the first air chamber 231 from the second valve chamber 315, so that the purpose of two-way airing can be achieved.

Referring to FIGS. 4, 5, and 6, when the internal pressure of the inflated body approaches saturation, in order to reduce the resistance of the pumping mechanism 3, the user can rotate the air outlet switch seat 4, and the air switch seat 4 is switched to FIG. In the air venting position, the air venting groove 416 of the venting switch seat 4 corresponds to the air venting opening 204 of the pedestal 2 at this time. The operation of the pumping mechanism 3 at the time of descending and the manner of entering and exiting are the same as those described above, and will not be described again. When the air pumping mechanism 3 rises, although the gas located in the first air chamber 231 is compressed due to the space reduction, since the air leakage hole 204 communicates with the first air chamber 231, it is located in the first air chamber 231. The gas inside can be vented from the vent hole 204, and therefore, it is relatively labor-saving when the pumping mechanism 3 is pulled up.

It can be seen from the above description that the vent hole 204 is disposed on the cylinder wall 20 corresponding to the first air chamber 231, and the venting opening 4 is used to open and close the structure of the vent hole 204, not only in the two-way pump The product is unprecedented in innovation, the foregoing structure is relatively simple, and the operation is also quite convenient. In particular, the air venting switch seat 4 is disposed at a position adjacent to the upper side of the pedestal 2, and has the effect of relatively convenient operation. Therefore, the present invention is novel. It is indeed a two-way pump with simplified components, easy operation and maintenance.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Inflatable tube
2‧‧‧Tucket
20‧‧‧Cylinder wall
201‧‧‧ Around the wall
202‧‧‧ bottom wall
203‧‧‧Top wall
204‧‧‧ Ventilation holes
205‧‧‧Restricted projections
206‧‧‧through hole
21‧‧‧ gas storage tube
22‧‧‧Capping
23‧‧‧ gas storage space
231‧‧‧First air chamber
232‧‧‧Second chamber
24‧‧‧ pedal
25‧‧‧First seal ring
26‧‧‧Second seal ring
3‧‧‧Inflating mechanism
31‧‧‧piston unit
311‧‧‧Piston
312‧‧‧First seat
313‧‧‧Second seat
314‧‧‧First valve room
315‧‧‧Second valve room
33‧‧‧ piston rod
331‧‧‧First casing
332‧‧‧second casing
333‧‧‧First Passage
334‧‧‧second channel
34‧‧‧Drive seat
341‧‧‧Sets Department
342‧‧‧Hands
343‧‧‧Exhaust pipe department
35‧‧‧ pressure gauge
4‧‧‧Break switcher
41‧‧‧Adjustment
410‧‧‧ annular space
411‧‧‧ Inner torus
412‧‧‧Limited to face
413‧‧‧Dissipating the face
414‧‧‧Closed face
415‧‧‧Sloping face
416‧‧‧ Ventilation trough
417‧‧
42‧‧‧Control block

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a perspective view of one embodiment of the two-way dual-purpose pump, illustrating the two-way pump and one Fig. 2 is an exploded perspective view of the embodiment; Fig. 3 is a plan view of the embodiment; Fig. 4 is a cross-sectional view taken along line 4-4 of Fig. 3; Figure 3 is a cross-sectional view taken along line 6-6 of Figure 4, the venting switch seat is in a deflated position; and Figure 7 is a view similar to Figure 6, The venting switch seat is in a two-way pumping position.

2‧‧‧Tucket

20‧‧‧Cylinder wall

201‧‧‧ Around the wall

203‧‧‧Top wall

204‧‧‧ Ventilation holes

205‧‧‧Restricted projections

206‧‧‧through hole

21‧‧‧ gas storage tube

22‧‧‧Capping

33‧‧‧ piston rod

331‧‧‧First casing

332‧‧‧second casing

333‧‧‧First Passage

334‧‧‧second channel

34‧‧‧Drive seat

341‧‧‧Sets Department

342‧‧‧Hands

343‧‧‧Exhaust pipe department

23‧‧‧ gas storage space

24‧‧‧ pedal

25‧‧‧First seal ring

26‧‧‧Second seal ring

3‧‧‧Inflating mechanism

31‧‧‧piston unit

35‧‧‧ pressure gauge

4‧‧‧Break switcher

41‧‧‧Adjustment

410‧‧‧ annular space

411‧‧‧ Inner torus

42‧‧‧Control block

Claims (10)

A two-way pump for delivering gas to an object to be inflated and comprising: a barrel base having a barrel wall and a gas storage space defined by the tube wall, the barrel wall having a venting opening; a mechanism having a piston rod having a first sleeve defining a first passage and communicating with the object to be inflated, and a second sleeve defining a second passage with the first sleeve The pumping mechanism further has a piston unit coupled with the piston rod, the piston unit partitioning the gas storage space into a first air chamber communicating with the air venting hole, and a second air chamber; and a venting switch a seat having an rotatably mounted adjustment member mounted on the wall of the cylinder, the adjustment member having a closed face that closes the vent when the venting switch seat is in a two-way airing position, and a venting switch seat in the Open the venting groove of the vent hole when the position is deflated. The two-way pump according to claim 1, wherein the adjusting member has an inner annular surface that defines the closed air surface and defines an annular space, the inner annular surface further having a deflated surface adjacent to the closed air surface, and a slanted surface connected between the air-closing surface and the deflated surface, the distance from the deflated surface to a center of rotation of the annular space, greater than a distance from the air-closing surface to the center of rotation, the venting groove corresponding to the deflated face And the inclined face, the distance between the inclined face and the center of rotation is gradually increased from one end adjacent to the closed face to one end of the blowdown face. The two-way pump according to claim 1 or claim 2, wherein the cylinder wall further has a limiting protrusion, and the adjusting member of the air switching seat further has a corresponding limiting protrusion and restricting the deflation The limit rotation groove that switches the rotation angle of the seat. The two-way pump of claim 3, wherein the blowdown switch seat further has at least one trigger block coupled to the adjustment member. The two-way pump of claim 3, wherein the cartridge also has a first sealing ring surrounding the venting opening. The two-way pump of claim 3, wherein the piston unit has a piston coupled to the piston rod, the piston having a first passage connecting the first passage, the first plenum, and the second plenum a valve chamber, and a second valve chamber connecting the second passage, the first air chamber and the second air chamber, and the piston unit further has two installed in the first valve chamber and the second valve chamber a first valve seat, and two second valve seats respectively installed in the first valve chamber and the second valve chamber; when the piston rod drives the piston to rise, the first valve seats respectively open the first valve seat a flow path between the first passage and the first air chamber, and a flow passage between the second passage and the second air chamber, and when the piston rod drives the piston to descend, the second valve seats will respectively open the a flow path between the first passage and the second air chamber, and a flow passage between the second passage and the first air chamber. The two-way pump according to claim 1, wherein the cylinder base further has a surrounding wall portion, a top wall portion, and a bottom wall portion surrounding the gas storage space and provided with the air venting hole, the vent hole Adjacent to the top wall portion. The two-way pump according to claim 6, wherein the cylinder base further has a surrounding wall portion, a top wall portion, and a bottom wall portion surrounding the air storage space and the air leakage hole, the air leakage hole Adjacent to the top wall portion. The two-way pump according to claim 8, wherein the cylinder base further has two pedals horizontally protruding on the side of the bottom wall portion, and the air pumping mechanism further has a driving base coupled to the piston rod. The drive base has two handle portions that protrude toward opposite sides. The two-way pump of claim 9, wherein the driver base further has an air outlet tube portion in communication with the first passage.