JPH0335996Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a water gun that shoots pressurized water from a nozzle hole to hit a target.

(Prior Art) Various types of water guns have been widely known, and one example is a cylinder with a nozzle hole formed on the front (bottom) and a water gun that is slidably fitted into the cylinder. and a rod having a piston portion, the wall portion of the rod and the piston portion of the rod sealingly form a pressurized chamber communicating with the nozzle hole in the cylinder, and the piston portion is retreated by pulling the rod. After sucking water into the pressurized chamber of the cylinder through the nozzle hole, by pushing the rod by hand to advance the piston part, the water in the pressurized chamber was pressurized and sprayed from the nozzle hole to hit the target. There is something.

(Problems to be Solved by the Invention) However, with this device, the rod is pressed by hand to pressurize the water in the pressurizing chamber, so force is required for the pressurizing operation. Furthermore, since the pressure may vary, the so-called trajectory of the water ejected from the nozzle hole is not constant, resulting in a low probability of hitting the target.

Therefore, the main purpose of this invention is to use the restoring force of the bow body or the string stretched on the bow body to push the rod, so that no force is required to spray water, and the pressure is The objective is to maintain a stable trajectory of the jetted water by keeping the pressurizing force on the water in the room constant.

(Means for Solving the Problem) In order to achieve this object, the solution of the present invention provides a curved bow body and a string stretched between both ends of the bow body.

Further, a seal forming member is fixed to the center of the bow body, which has a pressurization chamber with a variable volume that stores water therein, and has a guide portion extending toward the string side at the rear of the pressurization chamber. A nozzle hole communicating with the pressurizing chamber is formed on the front surface of the hermetically sealed member. The pressurized chamber within the hermetically sealed member is formed within a hermetically sealed body partially made of an elastic material such as rubber.

Furthermore, a rod is provided that is slidably inserted into the guide portion of the sealing member, and the rear end of the rod is coupled to the central portion of the string.

Either one of the bow body and the string is made of an elastic material, and when the rod is retreated together with the string, the rod is advanced by the restoring force of the bow body or the string, and a closed cylinder is formed at the front end of the rod. By striking the rear end surface of the pressurizing chamber, the pressurizing chamber is contracted, and the water inside the pressurizing chamber is pressurized to be ejected from the nozzle hole.

(Function) According to this configuration, when shooting water from a water gun, the string is pulled backwards together with the rod, and when the string is released after aiming at the target, the rod is pulled back from the string by the restoring force of the bow body made of elastic material or the string. When this rod moves to the forward end position, its front end hits the rear end of the sealing cylinder, and this blow partially elastically deforms the sealing cylinder. The pressurized chamber inside the sealed cylinder contracts by the amount of the deformation, and this contraction pressurizes the water in the pressurized chamber, and a portion of the water is turned into droplets from the nozzle hole and is ejected toward the target.

In that case, the water in the pressure chamber is pressurized by the restoring force of the bow body or string, so there is no need for pressurizing force when shooting water, and the only force needed is to pull the string backwards with the rod. It turns out.

Moreover, since the restoring force of the bow body or string is used to pressurize the water in the pressurized chamber, the pressurizing force also becomes constant, stabilizing the trajectory of the ejected water and increasing the probability of hitting the target. It is.

Furthermore, since the front end of the advancing rod hits the closed cylinder and pressurizes the water in the pressurizing chamber, the rod applies pressure force to the water in the pressurizing chamber in a shocking manner in a very short period of time. As a result, a small amount of water can be ejected from the nozzle hole in the form of droplets at high speed, further improving the probability of hitting the target, and making it easier to determine whether the target has been hit or not. can do.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

3 to 6 show the overall structure of a water gun A according to an embodiment of the present invention, in which 1 is a bow whose both ends are bent backwards to form a curve;
is made of an elastic material such as glass fiber. A string 2 is stretched between both ends of the bow body 1, and the bow body 1 is stretched by pulling the center part of the string 2 backward.
By increasing the distance between
The center portion of the string 2 is urged forward by the restoring force.

A circular through hole 3 is formed in the center of the bow body 1, as shown in enlarged detail in FIG. The hermetically sealed member 4 has a flange portion 4a protruding from its outer periphery which is inserted through the rivets 5, 5 so as to be perpendicular to each other.
It is stopped and fixed to the bow body 1. A sealing cylinder 6 is immovably fitted into the deep bottom of the front end of the sealing member 4. The cylindrical body 6 has a bottomed cylindrical part 6a made of relatively highly elastic rubber whose bottom part is fixed to the bottom of the seal forming member 4 and is opened at the rear, and a rear end opening of the cylindrical part 6a is fitted into the cylindrical part 6a. It consists of a lid part 6b made of metal or the like that is sealed when the cylinder part 6a is closed, and the parts other than the bottom part of the cylinder part 6a (the circumferential wall of the cylinder part 6a and the lid part 6
b) can be moved within the seal-forming member 4 by a certain amount.

A pressurized chamber 7 for storing water is formed inside the sealed cylinder 6, and the volume of this pressurized chamber 7 is made variable by elastic deformation of the cylindrical portion 6a of the sealed cylinder 6. There is.

A check valve 8 made of a reed valve is provided on the lower surface of the pressurizing chamber 7 (the circumferential wall of the sealing cylinder 6) in the sealing member 4. The check valve 8 consists of a valve port 8a opened in the circumferential wall of the sealed cylinder 6, and a valve body 8b that is swingably supported on the lower surface of the circumferential wall of the pressurizing chamber 7 and opens and closes the valve 8a. The valve port 8a is connected to the water suction pipe 10 through a water suction hole 9 formed through the lower wall of the sealing member 4.
The other end of the water suction pipe 10 is connected to one end of
It communicates with a water tank 12 attached to the bow body 1 above the seal forming member 4 through rivets 5 and 11 so as not to hinder target aiming, and a check valve 8 allows water in the walk tank 12 to flow through the valve port 8a. Water in the pressurizing chamber 7 is allowed to flow into the pressurizing chamber 7 through the valve port 8a, but water in the pressurizing chamber 7 is prevented from returning into the walk tank 12 through the valve port 8a.

Further, a cylindrical guide portion 4c is formed in the hermetic formation member 4 at the rear of the pressurizing chamber 7 and extends rearward toward the center of the string 2. moreover,
A nozzle hole 13 is formed through the front surface (bottom) of the seal forming member 4 at the center thereof.
is a micro hole 6 formed through the bottom of the sealed cylinder 6.
It is communicated with the pressurizing chamber 7 via c.

On the other hand, the guide portion 4b at the rear of the seal forming member 4
A hollow cylindrical rod 14 is slidably inserted therein, and a pin 15 is provided protruding from the front outer peripheral surface of the rod 14. The pin 15 is slidably engaged in a sliding groove 4c formed through the rod, and the engagement between the pin 15 and the sliding groove 4c changes the stroke length of the rod 14 with respect to the sealing member 4 and the sealing member. We are trying to restrict dropping out from 4. Further, as shown in enlarged detail in FIG. 2, the rear end of the rod 14 is connected to the center of the string 2 by three pins 16, 16 fixed in a zigzag shape in the diameter direction within the rod 14. , ... are immovably connected by passing the string 2 between them. Therefore, when the rod 14 is moved back together with the string 2 and the bow body 1 is deformed in a curved manner, the restoring force of the bow body 1 causes the rod 14 to
is advanced, and the front end of the advancing rod 14 hits the rear end surface of the lid 6b of the sealed cylinder 6 to close the cylinder 6a.
The pressure chamber 7 in the cylinder body 6 is contracted to pressurize the water inside the cylinder body 6, and a part of it is passed through the microhole 6c of the cylinder body 6 to the nozzle hole 13 of the sealing member 4. It is configured to be fired from.

In FIG. 1, reference numeral 17 denotes an air vent passage that communicates between the upper part of the pressurizing chamber 7 in the sealed cylinder 6 and the inside of the water tank 12 above it, and an opening 17a to the pressurizing chamber 7. In this case, the lid 6b of the cylinder 6 is attached to the rod 1.
It is arranged in a position where it is closed by the cover part 6b when it is struck by the front end of the cover part 4 and moves forward by a certain amount. Further, 18 is formed on the lower wall of the seal forming member 4 immediately behind the seal cylinder 6 in order to allow the front end of the rod 14 to slide smoothly within the guide portion 4c of the seal forming member 4 without receiving pressure resistance. This is a through hole. 19 is a resin cap attached to the front surface of the seal forming member 4; 20 is a cover attached to the bow body 1 below the seal forming member 4 so as to cover the water suction pipe 10, etc.;
is integrally formed so as to be continuous with the water tank 12. 12a is a water supply port for replenishing water into the water tank 12, and 12b is a lid thereof. Furthermore, in FIG. 3 and other figures, reference numeral 21 denotes a non-slip rubber cap attached to the rear end of the rod 14 (the part where it connects to the string 2).

Next, a method of using the water gun A having the above configuration will be explained.

After filling the water tank 12 with water, hold the center of the bow body 1 with one hand (usually your non-dominant hand), and hold the rod connected to the string 2 with your other hand (usually your non-dominant hand). 14 Grasp the cap 21 at the rear end and remove the bow body 1.
When the rod 14 is pulled backward against the deformation resistance of the
Retreat within b. After pulling the rod 14 to the rearward end position regulated by the pin 15,
In this state, when you aim at the target and release the rod 14, the restoring force of the bow body 1 will cause the string 2 to
moves forward to its original position, and the rod 14 is pushed forward by the moving string 2, thereby sealing the sealing member 4.
It moves forward inside the guide part 4b. When the rod 14 moves to a substantially forward position, its front end hits the rear end surface of the lid 6b of the sealed cylinder 6, and the impact from the front end of the rod 14 causes the cylinder part 6a of the sealed cylinder 6 to The lid portion 6b is elastically deformed, and the lid portion 6b moves forward by the amount of deformation to open the opening 1 of the air vent passage 17.
7a is closed, and this closure seals the pressurizing chamber 7 inside the sealed cylinder 6. This pressurizing chamber 7 is further contracted by the advancing lid part 6b, and due to this contraction, the water in the pressurizing chamber 7 is pressurized and a part of it is transferred to the micro-port 6.
c, the water drops form the nozzle hole 13 on the front surface of the sealing member 4 and are ejected toward the target.
In addition, after the water is ejected in this way, Rod 1
4 is pushed back rearward by the restoring force of the sealed cylinder 6, and the air vent passage 17 is opened. With the above operations, the water ejection operation is completed.

In this case, the rod 14 is advanced by the restoring force of the bow body 1, and its front end deforms the closed cylinder 6 by impact, thereby contracting the pressurizing chamber 7 and pressurizing the water inside. Although the operation requires a tensile force to pull the string 2 backward, after that, it is sufficient to simply release the string 2, and no pressurizing force is required to shoot the water, making the shooting operation easy.

Moreover, since the restoring force of the bow body 1 is constant, it is possible to ensure a constant pressurizing force against the water in the pressurizing chamber 7, which stabilizes the trajectory of the ejected water and increases the probability of hitting the target. can.

Furthermore, the front end of the rod 14, which moves forward in response to the restoring force of the bow body 1, hits the sealed cylinder 6 and pressurizes the water in the pressurizing chamber 7, so that the water in the pressurizing chamber 7 is pressurized. can be applied impulsively in an extremely short period of time, and as a result, a small amount of water can be ejected from the nozzle hole 13 in the form of water droplets at high speed, and the probability of hitting the target can be further improved. It is possible to easily and reliably determine whether or not the target has been hit.

(Other Embodiments) FIG. 7 shows another embodiment of the present invention. Furthermore, the first
The same parts as in the figures are given the same reference numerals, and detailed explanation thereof will be omitted.

That is, in this embodiment, the cylindrical portion 6'a of the hermetically sealed cylinder 6' that is fitted into the hermetically sealed member 4 is made of a material such as metal that does not undergo elastic deformation. A lid 6'b is slidably fitted into the opening of the rigid cylindrical part 6'a, and a spacer 6'd made of an elastic material is interposed between the two. The water in the pressurizing chamber 7 is pressurized by elastically deforming the spacer 6'd when the lid part 6'b is hit by the spacer. The other parts are the same as those in the above embodiment. Therefore, in this embodiment as well, the same effects as in the above embodiment can be achieved.

In each of the above embodiments, the bow body 1 is made of an elastic material and its restoring force moves the rod 14 forward. It is also possible to use the restoring force of the string to move the rod forward.Furthermore, both the bow body and the string may be made of elastic materials, and the synergistic restoring force of the two moves the rod 14 forward. may be energized.

(Effects of the invention) As described above, according to the invention, the rod is moved forward by utilizing the restoring force of the bow body or the string when the string stretched on the bow body is pulled backward, and the front end of the rod is moved forward. By striking a sealed cylinder made of an elastic material such as rubber with a seal-forming member, the water in the pressurized chamber formed inside the sealed cylinder is pressurized and ejected from the nozzle hole toward the target. This eliminates the need for force when ejecting water, which facilitates the ejection operation, and also stabilizes the trajectory of the ejected water by keeping the pressurizing force on the water in the pressurizing chamber constant. Furthermore, since the rear end surface of the sealed cylinder is struck by the front end of the rod, the pressurized chamber can be instantly deflated, and droplet-shaped water can be jetted out from the nozzle hole at high speed, making the operation simple. You can obtain a water gun with a high hit rate, and also make it easier to judge the hit.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an enlarged sectional view of the main parts, FIG. 2 is a sectional view showing the connecting structure between the string and the rear end of the rod, and FIG. 3 is a perspective view of the entire water gun. Figure 4 is the same front view, Figure 5 is the same side view, and Figure 6 is the same front view.
The figure is an exploded perspective view. FIG. 7 is a diagram corresponding to FIG. 1 showing another embodiment. A, A'... Water gun, 1... Bow body, 2... String, 4... Sealing forming member, 4b... Guide portion, 6, 6'... Sealing cylinder body, 7... Pressurizing chamber, 13... Nozzle hole, 14... Rod .

Claims (1)

[Scope of utility model registration request] The bow body has a curved bow body, a string stretched between both ends of the bow body, and a pressurization chamber fixed to the center part of the bow body and having a variable volume that stores water therein. A seal forming member having a guide portion extending rearward toward the string side in the pressure chamber, and a nozzle hole communicating with the pressurizing chamber formed in the front surface, and a seal member slidably fitted into the guide portion of the seal forming member. a rod inserted into the string, the rear end of which is connected to the center of the string; at least one of the bow body and the string is made of an elastic material;
The pressurized chamber in the hermetically sealed member is formed in a hermetically sealed cylinder partially made of an elastic material such as rubber, and the rod is moved forward by the restoring force of the bow body or string when the rod is retreated together with the string. , by striking the rear end surface of the closed cylinder with the front end of the rod, the pressurized chamber is contracted, and the water inside the pressurized chamber is pressurized to be ejected from the nozzle hole. Water gun.