JPH0338464Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a manual air pump used for purposes such as injecting air into air-filled vinyl products.

[Conventional technology]

Conventionally, devices are known that discharge air only when the piston is pressed down.

[The problem that the idea aims to solve]

The air pump described in the above conventional technology is
Inflating efficiency was poor because the air was discharged only when the piston was pushed down and not when it was pulled up.

The object of the present invention is to provide a new air pump with high inflation efficiency that discharges air both when the piston is pushed down and when it is pulled up.

[Means to solve the problem]

In order to achieve the above object, the air pump of the present invention includes a cylinder, a hollow piston inserted into the cylinder, a piston rod whose lower end is connected to the piston and whose upper end extends above the cylinder, and an upper end of the piston rod. A handle provided in the section, an air intake passage formed between the inner and outer pipes with the piston rod as an inner and outer double pipe, an air discharge passage formed within the inner pipe, and an air intake passage provided at the upper end of the air intake passage. An air intake port, an air outlet provided at the upper end of the air discharge passage, a partition wall that divides the inside of the piston into left and right chambers, a connecting opening for the air intake passage opened in the left side chamber, and a connection opening opened in the right side chamber. The connection port of the ventilation duct, the ventilation holes in the upper and lower walls of the left side chamber, the upper and lower walls of the right side chamber, the holes in the top wall of the left side chamber, and the holes in the bottom wall of the right side chamber. A first check valve and a fourth check valve that open when the piston descends and close when it rises, and a through hole in the lower wall of the left chamber and a through hole in the upper wall of the right chamber that close when the piston descends and open when it rises. It includes a second check valve and a third check valve.

〔Example〕

The embodiment shown in the figure has footrests 1, 1' on both sides of the lower end.
A flat hollow piston 3 is inserted into a cylinder 2 having a diameter, a piston rod 5 is connected to the piston 3, and the upper end of the piston rod 5 protrudes above the upper cover 6 of the cylinder 2. A letter-shaped handle 7 is provided, and the piston rod 5 is made into an inner and outer double pipe, with an air intake passage 10 between the inner pipe 8 and the outer pipe 9, an air discharge passage 11 inside the inner pipe 8, and an air outlet passage 11 at the upper end of the air intake passage 10. The horizontal air intake short pipes 12 are connected to the horizontal air outlet short pipes 13 at the upper end of the air discharge path 11, and the inside of the piston 3 is further divided into left and right chambers 15, 16 by a partition wall 14, and the left side chamber 15 is The lower ends of the air intake passages 10 and the lower ends of the air discharge passages 11 are opened into the right side chamber 16, respectively, and the upper and lower both walls 1 of the left side chamber 15 are opened.
7, 18 and both upper and lower walls 19, 2 of the right chamber 16
0, through holes 21, 22, 23, 24 are opened in the upper wall 17 of the left chamber 15 and the through hole 24 in the lower wall 20 of the right chamber 16. Check valve 25
and a fourth check valve 28, and a second check valve 26 which closes when the piston 3 descends and opens when the piston 3 rises, into the through hole 22 in the lower wall 18 of the left chamber 15 and the through hole 23 in the upper wall 19 of the right chamber 16. A third check valve 27 is provided respectively.

In addition, in the figure, 29 is a tube, and 30 is a tube 29.
31 is a socket attached to the rear end of the tube 29, 32 is an upper stopper, 33 is a lower stopper, 34 is a boss, 35 is a piston rod packing, 36 is a piston fitting, and 37 is a piston. The packing ring is shown.

[Effect]

When the handle 7 is pulled up, the air existing above the piston 3 in the cylinder 2 is discharged from the short air outlet pipe 13 through the through hole 23 with the third check valve 27 and the air discharge path 11, and is also discharged from the air below the piston 3. The air intake path 1 is connected from the air intake short pipe 12 to the area indicated by .
Air is sucked in through the ventilation hole 22 with the 0 and second check valves 26, and when the handle 7 is pressed down, air is sucked in from the short air intake pipe 12 in the cylinder 2 above the piston 3. passage 10 and first check valve 2
Air is sucked in through the ventilation hole 21 with 5, and the air existing below the piston 3 is passed through the ventilation hole 24 with the fourth check valve 28 and the ventilation path 11 to the discharge port short pipe 13.
It causes wind to be exhaled.

That is, when the tube 29 is connected to the short air outlet pipe 13, air is discharged from the nozzle 30 both when the handle 7 is pushed down and when it is pulled up, and when the tube 29 is connected to the short air intake pipe 12, air is discharged from the nozzle 30. At this time, air is sucked from the nozzle 30 whether the handle 7 is pushed down or pulled up.

Therefore, for example, if you want to supply air to an air-filled vinyl product, etc., and use the tube 29 by connecting it to the short air outlet pipe 13, or if you want to forcefully remove air from inside an air-filled vinyl product, etc. When the tube 29 is used in conjunction with the short air intake pipe 12, air can be efficiently introduced or extracted in a so-called double manner by pushing down and pulling down the handle 7.

[Effect of idea]

Since the present invention has the above-mentioned configuration, air is discharged and sucked both when the piston is pushed down and when it is pulled up, and the amount of air blown or sucked out is approximately twice that of the conventional device. It has the excellent effect of completely achieving the intended purpose.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the air pump of the present invention, Fig. 2 is an overall perspective view with the handle pushed down, and Fig. 3 is a sectional view showing the handle in the middle of being pulled up. Figure 4 is a cross-sectional view showing the state in which the handle is being pressed down, Figure 5 is a cross-sectional view taken along line A-A in Figure 4, and Figure 6 is Figure 4.
FIG. 3 is a cross-sectional view taken along line A'-A'. 1, 1'... Footrest, 2... Cylinder, 3...
Piston, 5...Piston rod, 6...Top lid,
7...Handle, 8...Inner tube, 9...Outer tube,
10... Air intake path, 11... Air outlet path, 12... Air intake short pipe, 13... Air outlet short pipe, 14... Partition wall,
15...Left ventricle, 16...Right ventricle, 17,18,
19, 20... face wall, 21, 22, 23, 24...
...Through hole, 25, 26, 27, 28...Check valve, 2
9...Tube, 30...Nozzle, 31...Socket, 32...Upper plug, 33...Lower plug, 34...
Boss, 35...Piston rod packkin, 36...
...Piston seal, 37...Pressure ring.

Claims (1)

[Scope of utility model registration request] A cylinder, a hollow piston inserted into the cylinder, a piston rod whose lower end is connected to the piston and whose upper end protrudes above the cylinder, a handle provided at the upper end of the piston rod, and a piston rod that is connected to the inside and outside of the cylinder. An air intake path formed between the inner pipe and the outer pipe as a pipe, an air outlet path formed within the inner pipe, an air intake port provided at the upper end of the air intake path, and an air intake path provided at the upper end of the air outlet path. An air discharge port, a partition wall that divides the inside of the piston into left and right chambers, a connection port for the air intake path opened in the left side chamber, a connection port for the discharge path opened in the right side chamber, and both upper and lower walls of the left side chamber. and a first check valve that opens when the piston descends and closes when it rises, which is provided in the through holes in the upper and lower walls of the right chamber, the through holes in the upper wall of the left chamber, and the through holes in the lower wall of the right chamber; A fourth check valve, and a second check valve and a third check valve, which close when the piston descends and open when the piston rises, are provided in a through hole in the bottom wall of the left side chamber and a through hole in the top wall of the right side chamber. An air pump characterized by: