JP4520864B2 - Hand pump - Google Patents

Description

  The present invention relates to a hand pump.

  A manual pump for supplying air to a bicycle is disclosed in Patent Document 1, for example. However, the fact is that no small and light pump that can supply air to ball balls such as soccer balls, rugby balls, American football, volleyball, and basketball, and that can efficiently supply air, has been commercialized.

Therefore, at present, a bicycle inflator is used as a ball inflator. In addition, there is a dedicated pump on the market for supplying air to the ball for ball games. However, in addition to the drawback of poor air supply efficiency (requires a large number of piston reciprocations), air is supplied to the ball. Since the nozzle (or tube) for this purpose always protrudes, there is a disadvantage that handling when the pump is not used is inconvenient. To connect a nozzle provided at the tip of an air feed hose connected to a bicycle pump for a bicycle and a blowing adapter for inserting air into an air enclosure such as a ball so that air can flow. (See, for example, Patent Document 2).
Utility model registration No. 3082527 specification Utility Model Registration No. 2510949 Specification

  The object of the present invention is to supply air to ball balls such as soccer ball, rugby ball, American football, volleyball, basketball, etc. It is an object of the present invention to provide a hand pump that can accommodate a nozzle (or tube) for performing the above operation and also functions as a vacuum pump for extracting air from a ball or the like.

The hand pump of the present invention has a first cylinder having a first end and a second end, a third end and a fourth end, and the first end through the first end from the third end. A first piston that is received in the inner space of one cylinder and is airtight and nested in the first cylinder, and the first cylinder can be opened and closed with an air needle attached to the second end. It has a Do inlet, the first piston, and a second cylinder provided therein, and a closable communication hole provided in the third end, by the communication hole, the second cylinder is communicable with the interior space of the first cylinder, wherein the second cylinder, a second piston hollow body having a nozzle mountable in said air needle is mounted for airtight and sliding, the Nozzle with air needle attached Can be housed in the second cylinder, during the compression stroke of the first piston, together with the communication hole is opened, the intake port is closed, the first air in the second cylinder in the cylinder Inflow, the nozzle protrudes from the second cylinder, air is discharged from the nozzle, the communication hole is closed and the intake port is opened during the intake stroke of the first piston, and the first cylinder is opened. It is characterized by the inflow of air.

  Preferably, the first cylinder and the first piston are provided with a drop prevention means for preventing the first piston from dropping from the first cylinder.

  Preferably, a piston ring is provided at the third end of the first piston.

  Preferably, a check valve is provided at the third end of the first piston and the second end of the first cylinder.

Moreover, it is preferable that an outer cylinder part is provided concentrically outside the first piston, and a part of the first cylinder can be fitted into the outer cylinder part .

  Moreover, it is preferable that a cap is detachably provided at the second end of the first cylinder, and the air needle can be stored in the cap.

  According to the present invention, air is supplied to a ball such as a soccer ball, rugby ball, American football, volleyball, basketball and the like. It is possible to provide a hand pump that can accommodate a nozzle (or tube) for the purpose of operation and also functions as a vacuum pump for extracting air from a ball or the like.

  A hand pump according to the present embodiment will be described in detail below with reference to the accompanying drawings.

  Referring to FIGS. 1 a, 1 b, 1 c, 2 a, 2 b, 3, and 4, the hand pump 1 of the present embodiment includes a first cylinder 2 and a first end 2 A of the first cylinder 2 to the first cylinder 2. And a first piston 3 received in the internal space R. An intake port 7 is provided at the second end B of the first cylinder 2. As shown in FIGS. 1b and 2b, the outer shape of the hand pump 1 of the present embodiment is substantially pentagonal, but is not limited to such a shape, and may be a quadrangle, a circle, an ellipse or the like. Good.

The first piston 3 is gas-tight and are found provided in the first cylinder 2 is telescopically injection opening 4 is provided in the fourth end portion D of the first piston 3. A second cylinder 5 is provided inside the first piston 3. A communication hole 6 is provided at the third end portion C of the first piston 3, and communicates with the internal space R of the first cylinder 2 through the communication hole 6.

  A second piston 8 made of a hollow body is slidably provided in the second cylinder 5. Furthermore, a nozzle 9 is provided via the second piston 8.

  The first cylinder 2 and the first piston 3 are provided with protrusions 10 and 11 that function as drop-off preventing means for preventing the first piston 3 from dropping from the first cylinder 2, respectively.

  An O-ring that functions as a piston ring 12 is provided at the third end C of the first piston 3, and the piston ring 12 realizes airtightness between the first piston 3 and the first cylinder 2. . Similarly, the second piston 8 is also provided with an O-ring 12 to realize airtightness between the second piston 8 and the second cylinder 5. Moreover, the weight 13 is provided in the 2nd piston 8, and the inertia of the motion of the 2nd piston 8 is achieved by this.

  A check valve 14 is provided at the third end C of the first piston 3, and a check valve 15 is provided at the second end B of the first cylinder 2. The check valve 14 and the check valve 15 open the communication hole 6 during the compression stroke of the first piston 3, close the communication hole 6 during the intake stroke of the first piston 3, and intake air during the intake stroke of the first piston 3. The opening 7 is opened, and the intake 7 is closed during the compression stroke of the first piston 3.

  An outer cylinder portion 16 is provided concentrically on the outer side of the first piston 3, and a part of the first cylinder 2 can be fitted into a space between the outer cylinder portion 16 and the first piston 3. For this reason, it is possible to increase the compression stroke of the first piston 3.

  Air needles 17 (FIG. 3) and 18 (FIG. 4) are provided at the tip of the nozzle 9. The air needle 17 shown in FIG. 3 is for a ball game ball, and the air needle 18 shown in FIG. 4 is for a vinyl toy.

  A cap 20 is detachably provided on the second end B side of the first cylinder 2. Air needles 17 (see FIG. 3) and 18 (see FIG. 4) that are not used can be accommodated on the inner bottom surface of the cap 20. As shown in FIG. 1c, the outer shape of the cap 20 applied to the hand pump 1 of the present embodiment is a pentagon, but is not limited to such a shape. In short, it is preferable to match the outer shape of the outer cylinder portion 16 and the first cylinder 2.

  Step I: The hand pump 1 of the present embodiment configured as described above has the second piston 8 provided in the second cylinder 5 before use as shown in FIGS. 1a and 2a. At the position of the stopper 19, the nozzle 9 and the air needles 17 and 18 are accommodated in the second cylinder 5. Next, as shown in FIGS. 3 and 4, when the first cylinder 2 and the first piston 3 are separated (intake stroke), the internal pressure in the first cylinder 2 decreases and the check valve 15 opens. Then, air flows into the first cylinder 2 from the intake port 7.

  Step II: Here, when the first cylinder 2 and the first piston 3 are brought close to the state shown in FIGS. 1 a and 2 a again (compression stroke), the air in the first cylinder 2 is caused to flow by the first piston 3. As a result, the internal pressure in the first cylinder 2 increases, the check valve 15 closes, the check valve 14 of the first piston 3 opens, and the compressed air in the first cylinder 2 passes through the communication hole 6 for the first time. 2 flows into the cylinder 5 and the pressure in the space S in the second cylinder 5 shown in FIGS. 1 a and 2 a increases, whereby the second piston 8 moves toward the fourth end D of the first piston 3. It moves, the nozzle 9 protrudes from the 2nd cylinder 5, and the air in the 2nd cylinder 5 is discharged | emitted from the nozzle 9. FIG.

Step III: As described above, the air needles 17 (FIG. 3) and 18 (FIG. 4) are attached to the tip of the nozzle 9, and the air needles 17 and 18 are inserted into the air introduction port of the ball for ball game. When the operations I to II are repeated, air is supplied into the ball for ball game. After the supply of air to the ball for the ball, accommodating the nozzle 9 and the air needle 17, 18 in the second cylinder 5 (i.e., the second cylinder 5 in a state where the air needle 1 7, 18 is attached to the nozzle 9 Housed inside).

  As described above, the hand pump 1 of the present embodiment can be provided with the air needles 17 and 18 at the intake port 7 of the second end B of the first cylinder 2. In this case, the hand pump 1 functions as a vacuum pump for extracting air from a ball or a vinyl toy. The operation of the vacuum pump will be described below.

  Referring to FIGS. 5 a, 5 b, 5 c, and 5 d, an air needle 17 or 18 is attached to the air inlet 7 of the first cylinder 2.

  Step I: Before use, as shown in FIGS. 5 a and 5 b, a part of the first cylinder 2 has entered the outer cylinder 16 of the first piston 3. Next, as shown in FIGS. 5c and 5d, when the first cylinder 2 and the first piston 3 are separated (intake stroke), the internal pressure in the first cylinder 2 decreases and the check valve 15 opens. From the air needle 17 or 18, air flows into the first cylinder 2 through the intake port 7. Therefore, when the air needle 17 or 18 is inserted into the air inlet of the ball or vinyl toy, the air in the ball or vinyl toy is excluded.

  Step II: Next, as shown in FIGS. 5 a and 5 b again, when the first cylinder 2 and the first piston 3 are brought close to each other (compression stroke), the air in the first cylinder 2 is compressed by the first piston 3. The internal pressure in the first cylinder 2 increases, the check valve 15 is closed, the check valve 14 of the first piston 3 is opened, and the compressed air in the first cylinder 2 is communicated from the communication hole 6 to the second cylinder. 5 and the pressure in the space S in the second cylinder 5 shown in FIGS. 1a and 2a increases and is discharged directly from the second cylinder 5 through the nozzle 9 or as shown. Then, it is discharged to the outside through the needle 17 or 18.

  Step III: When the operations of Steps I to II are repeated, the air in the ball or vinyl toy can be completely discharged.

It is explanatory drawing which shows the state before use of the hand pump concerning one embodiment of this invention. It is a front view of the hand pump of FIG. It is a top view of a cap. It is explanatory drawing which shows the state before use of the hand pump concerning one embodiment of this invention. 2b is a front view of the hand pump of FIG. 2a. FIG. It is explanatory drawing which shows the use condition (intake stroke) of the hand pump of FIG. 1a. It is explanatory drawing which shows the use condition (intake stroke) of the hand pump of FIG. 2a. It is explanatory drawing which shows the state before use in the case of using the hand pump of FIG. 1a as a vacuum pump. It is explanatory drawing which shows the state before use in the case of using the hand pump of FIG. 2a as a vacuum pump. It is explanatory drawing which shows the use condition (intake stroke) of the hand pump of FIG. 5a. It is explanatory drawing which shows the use condition (intake stroke) of the hand pump of FIG. 5b.

DESCRIPTION OF SYMBOLS 1 Hand pump 2 1st cylinder 3 1st piston 4 Injection port 5 2nd cylinder 6 Communication hole 7 Intake port 8 2nd piston 9 Nozzle 10 Drop-off prevention means 11 Drop-off prevention means 12 Piston ring (O-ring)
13 Weight 14 Check Valve 15 Check Valve 16 Outer Cylinder 17 Air Needle 18 Air Needle 19 Stopper 20 Cap

Claims (6)

A first cylinder having a first end and a second end;
A first end that has a third end and a fourth end, is received from the third end through the first end into the internal space of the first cylinder, and is airtight and nested in the first cylinder; A piston,
With
The first cylinder has an air inlet that can be opened and closed with an air needle attached to the second end,
The first piston has a second cylinder provided therein, and an openable / closable communication hole provided in the third end portion.
By the communication hole, the second cylinder is communicable with the interior space of the first cylinder,
A hollow second piston having a nozzle to which the air needle can be attached is provided in the second cylinder so as to be airtight and slidable.
The nozzle can be housed in the second cylinder with the air needle attached.
During the compression stroke of the first piston, the communication hole is opened, the intake port is closed, the air in the first cylinder flows into the second cylinder, and the nozzle is moved from the second cylinder. Protruding, air is discharged from the nozzle,
Wherein when the intake stroke of the first piston, together with the communication hole is closed, the intake port is opened, a hand pump for a ball, characterized in that air flows into the first cylinder. The hand pump according to claim 1, wherein
A hand pump in which the first cylinder and the first piston are provided with a drop prevention means for preventing the first piston from dropping from the first cylinder. The hand pump according to claim 1 or 2,
A hand pump in which a piston ring is provided at a third end of the first piston. The hand pump according to claim 1, 2, or 3 ,
A hand pump comprising a check valve provided at a third end of the first piston and a second end of the first cylinder. The hand pump according to claim 1, 2, 3 or 4,
A hand pump in which an outer cylinder part is provided concentrically on the outer side of the first piston, and a part of the first cylinder can be fitted into the outer cylinder part. The hand pump according to claim 1, 2, 3, 4 or 5,
A hand pump in which a cap is detachably provided at a second end of the first cylinder, and the air needle can be stored in the cap .

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