JPH046799Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a push rod for an air gun for teaching materials.

(Prior Art) As seen in Japanese Utility Model Application Publication No. 62-94370, an air gun for learning comprising a cylinder and a push rod inserted into the cylinder is well known.

For convenience of learning, the position of the push rod in this type of gun can be changed with respect to the rod body, so that the length of the push rod inserted into the barrel can be changed to various lengths. It is set to be regulated.

(Problem to be solved by the invention) In the conventional product described above, when changing the position of the grip, a relatively large force is required because the frictional resistance of the tube cylinder corresponding to the clip length is applied, which makes it difficult for children to learn. However, it is not easy to handle them quickly and accurately.

This idea was made in view of the current situation,
To provide a push rod for an air gun for learning that is easy for children to handle, provides accurate instruction, and is durable.

(Means for Solving the Problems) The push rod of the present invention has an insertion portion of the push rod formed into a rod body having a cross-shaped cross section, and a tip surface of an overhanging flat plate portion of the rod body along the longitudinal direction. A vine guide groove is formed, and a plurality of horizontal ribs are formed at predetermined intervals over the entire length of the insertion portion between the flat plate portion and another overhanging flat plate portion adjacent to the flat plate portion, and the guide groove is formed on the circumferential surface of each horizontal rib. A continuous locking groove is formed in the groove, and a protrusion is formed on the inner circumferential surface of the through-hole of the flange body through which the insertion portion is slidably displaced, and the protrusion is fitted into the guide groove. It is characterized in that it is fixed in a predetermined position by a sliding displacement operation of the collar body along the lateral rib and a rotation displacement operation to engage with the locking groove of the horizontal rib.

At this time, it is preferable to attach a code near each horizontal rib to identify the rib.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a partially cutaway side view of the air gun according to the present invention, Fig. 2 is a perspective view of the push rod excluding the flange, and Fig. 3 is a partially cutaway side view of the air gun according to the present invention.
The figure is a perspective view of the flange body, and Figure 4 shows the flange body on page 1 of Figure 2.
FIG. 5 is a cross-sectional view of the collar body and the insertion portion when the collar body is moved to the position p2 in FIG. 2. FIG.

As shown in the figure, the air gun is formed from a cylinder body 1 and a push rod 2 inserted from one side of the cylinder body. To use this, a front ball 3 made of a sponge or the like is loaded on the distal end side of the cylindrical body 1, a rear ball 4 made of a sponge or the like is also loaded on the proximal end, and then the rear ball 4 is pressed as described above. Push it in with the tip of stick 2.

The cylindrical body 1 is transparently made of synthetic resin or the like, and has a scale 5 on its outer surface.

Further, the push rod 2 has a grip portion 2a and an insertion portion 2.
b, and is formed as follows in the present invention.

That is, the grip portion 2a has a shape in which cylindrical portions 6 are stacked in multiple stages to prevent the hand gripping the grip portion from slipping. Further, the insertion portion 2b has four projecting flat plate portions 7a, 7b, 7c, and 7d that are perpendicular to each other so as to form a rod having a cross-shaped cross section as shown in FIG. A guide groove 8 is formed along the longitudinal direction of at least one of the protruding flat plate parts 7a at its distal end surface. Further, a plurality of horizontal ribs 9 are formed at predetermined intervals in the entire length range of the insertion portion 2b between the projecting flat plate portion 7a and another adjacent projecting flat plate portion 7b, and the peripheral surface of each horizontal rib 9 is A continuous locking groove 10 is provided so as to intersect the guide groove 8 at, for example, 90 degrees.
Then, a code for specifying the rib 9 is attached to a location near each horizontal rib 9, and this code is, for example, 1,
Use consecutive numbers such as 2, 3, etc.

In this example, as shown in FIG.
A guide groove 11 is also formed on the distal end surface of the other overhanging flat plate portion 7c facing the lateral rib 9 and the horizontal rib 9 is formed between the overhanging flat plate portion 7c and another overhanging flat plate portion 7d adjacent thereto. A plurality of horizontal ribs 12 are provided in a symmetrical arrangement,
Moreover, the guide groove 11 is also formed on the circumferential surface of these horizontal ribs 12.
A continuous locking groove 13 is provided intersecting at 90 degrees.

Further, a flange body 15 as shown in FIG. 3 is fitted onto the insertion portion 2b before the tip member 14 is attached thereto. The flange body 15 consists of an operating knob part 15a having a diameter larger than that of the cylinder body 1 and a part 15b having a smaller diameter than this part, and has a transparent part in the center thereof for fitting onto the insertion part 2b. A hole 16 is formed, and a protrusion 17 is formed on the inner circumferential surface of the through hole 16 to fit into the guide grooves 8 and 11 when the collar body 15 is fitted onto the insertion portion 2b.
18 are formed to correspond to the guide grooves 8 and 11. Note that after the tip member 14 is attached, the collar body 15 can be slid along the insertion portion 2b only between the tip member 14 and the grip portion 2a.

In the case of the air gun constructed as above, the length of the push rod 2 to be inserted into the cylinder body 1 is varied and the ball firing operation is performed, that is, the distance between the balls 3 and 4 is changed. By observing the flying distance of the corresponding ball 3, the air characteristics etc. are learned.

To change the insertable length of the push rod 2 into the cylindrical body 1, the collar body 15 is moved. To do this, the collar body 15 is slid by a predetermined distance along the insertion portion 2b, and an appropriate length is moved. Rotate around the horizontal ribs 9, 12 in the NO position by an appropriate angle (several tens of degrees), and as shown in FIG.
The protrusions 17 and 18 of the collar body 15 are fitted into the holes 0 and 13.

At this time, the flange body 15 can be operated to change its position without requiring much force, and this operation is extremely easy for children, and the flange body 15 after the position change operation is symmetrical. Since it is firmly supported by the two horizontal ribs 9 and 12 in position and is locked by the two opposing protrusions 17 and 18, it can be stably positioned.

When the push rod 2 with the flange body 15 changed and fixed in position is inserted into the cylinder 1 from the distal end member 14 side, when the push rod 2 is inserted a predetermined length, the proximal end side s of the cylinder 1 and the flange body are inserted. 15 comes into contact, and further insertion is restricted.

In addition, during learning instruction, when an instructor instructs a large number of children, each of whom has the air gun of the present invention, as to the locking position of the collar body 15, the horizontal ribs 9, 1
This can be done all at once by specifying the code attached to the location near point 2.

In addition, in the above embodiment, all the overhanging flat plate parts 7a
A guide groove is formed on each tip surface of ~7d, and a plurality of lateral ribs are formed symmetrically between each of the overhanging flat plate portions and the other adjacent overhanging flat plate portions, and each of these lateral ribs is It is also possible to form a locking groove continuous with any of the guide grooves on each circumferential surface.

(Effects of the invention) According to the invention as described above, the insertion length of the push rod can be changed quickly and accurately by the sliding displacement operation along the insertion portion and the rotation operation around the insertion portion of the collar body. It is also easy to learn because the locking position of the flange body can be communicated to children who need to learn using codes.Furthermore, horizontal ribs are formed near the tip of the push rod. Because of this, the rigidity when inserting the push rod can be strengthened.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the air gun according to the present invention, Fig. 2 is a perspective view of the push rod excluding the flange, and Fig. 3 is a partially cutaway side view of the air gun according to the present invention.
The figure is a perspective view of the flange body, and Figure 4 shows the flange body on page 1 of Figure 2.
FIG. 5 is a cross-sectional view of the collar body and the insertion portion when the collar body is moved to the position p2 in FIG. 2. FIG. 2... Push rod, 2b... Insertion part, 7a to 7d...
...Protruding flat plate portions, 8 and 11...Guide grooves, 9 and 1
2... Horizontal ribs, 10 and 13... Locking grooves, 15...
...Flame body, 16...Through hole, 17 and 18...Protrusion.

Claims (1)

[Claims for Utility Model Registration] 1. The insertion portion 2b of the push rod 2 is formed into a rod shape with a cruciform cross section, and a guide groove 8 is formed along the longitudinal direction of the protruding flat plate portion 7a of the rod. A plurality of horizontal ribs 9 are formed in the entire length range of the insertion portion 2b between the flat plate portion 7a and another protruding flat plate portion 7b adjacent to the flat plate portion 7a.
are formed at predetermined intervals, and a locking groove 10 is formed on the circumferential surface of each horizontal rib 9 so as to intersect with and continue with the guide groove 8.
forming a protrusion 17 on the inner peripheral surface of the through hole 16 of the flange body 15 which slides and displaces the insertion part 2b, and fitting the protrusion 17 into the guide groove 8;
A push rod for an air gun for teaching materials, characterized in that it is fixed in a predetermined position by a sliding displacement operation of a collar body 15 along the rod body and a rotation displacement operation for engaging with a locking groove 10 of a horizontal rib 9. . 2. The push rod for an air gun for teaching materials according to claim 1, wherein a reference numeral is attached to a portion near each horizontal rib 9.