JPH0137488Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an elastic stopper used for, for example, a table cover or a potter's wheel for children.

Conventionally, this type of elastic stopper is known, for example, as disclosed in Japanese Utility Model Application Publication No. 15647/1983.

As shown in FIG. 6, the elastic stopper 10 includes a substantially semicircular curved piece 11, an elastic piece 12 that continues below one end of the curved piece 11, and a resilient piece 12 that extends below the other end of the curved piece 11. It consists of a continuous, approximately triangular hooking portion 13, and a stopper portion 14 that continues below the hooking portion 13, and has an inverted approximately U-shape as a whole.

Therefore, such an elastic stopper 10 is installed inside the lower wheel main body 20 as shown in FIG.
It is made to be 0.

That is, the wheel main body 20 has an inner cavity 21, and a vertical elongated hole 22 that reaches the inner cavity 21 from the outside is bored in the upper peripheral wall thereof, and the elastic stopper 10 has a hooking part 13. It is installed internally so as to protrude outward from the long hole 22.

However, in the case of the conventional elastic stopper 10,
The engagement with the upper wheel is released by pressing the latching part 13 from the outside with a finger, but at that time, it often happens that the latching part 13 is pressed down too much and does not return to its original state.

This is because, as shown in FIG. 8, the conventional elastic stopper 10 has a triangular top portion A
As soon as the bottom part B comes out of the elongated hole 22 of the lathe main body 20, the elastic stopper 10 rotates or twists slightly with respect to the longitudinal axis of the lathe main body 20. depending on the latching part 1
3 gets caught on the inner surface of the peripheral wall near the elongated hole 22 and becomes unable to protrude again.

Therefore, if this happens, the elastic stopper 10 will not be able to perform its original function at all since it will no longer be able to engage with the bottom wheel.

This invention was devised to solve the problems mentioned above, and its purpose is to:
To provide an elastic stopper for a lathe that can properly return to its original state and fulfill its original function even if it is pressed down too much.

The elastic stopper of the wheel of the present invention has a curved piece that has a substantially circular shape and can abut the lower surface of the upper wall of the wheel's main body, and a curved piece that is connected to the bottom of one end of the curved piece and that is attached to the wheel's main body. An elastic piece that can elastically engage with the inner surface of the peripheral wall on the opposite side of the elongated hole, and a hooking part that is connected to the lower end of the other end of the curved piece and has a substantially triangular shape and can protrude outward from the elongated hole of the bottom wheel body. a stop piece part that is connected to the lower part of the hook part and can elastically fit with the inner surface of the circumferential wall below the elongated hole of the lower wheel body; The feature lies in that it consists of a protrusion that always faces into the elongated hole of the potter's wheel body and can come into contact with the upper end of the elongated hole.

In other words, even if the top part of the hook part comes off the long hole of the bottom wheel main body due to excessive pressure, the protrusion formed at the foot of the catch part still faces into the long hole.

Since the present invention is constructed as described above, even if the upper wheel is pressed down too much when releasing the engagement, it can accurately return to its original state and fulfill its original function.

Furthermore, according to the present invention, the upper wheel will not come off inadvertently after it is hooked with the elastic stopper. The upper end of the elongated hole and the protrusion come into contact with each other, and the upper force of the upper wheel acting on the hooking part of the elastic stopper is carried by this abutting part, and the abutting part moves in the direction of the upper force. This is because, since the latching portion is approximately located, there is almost no sinking of the latching portion.

Moreover, according to the present invention, even if the size of the long hole becomes slightly smaller due to wear of the mold, or if the long hole is formed below the normal position due to misalignment, the above-mentioned This function ensures that the upper wheel will not come off inadvertently.

In addition, according to the present invention, it is only necessary to slightly modify the conventional mold, so there is no need to create a new mold, making it extremely economical.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a front view showing an elastic stopper according to an embodiment of the present invention. FIG. 2 is a partially cutaway front view of the state in which the elastic stopper is installed inside the lathe main body to form the lathe.

The main parts of the elastic stopper 1 include a curved piece 2, an elastic piece 3, a hook 4, a stopper 5, and a protrusion 6.

The curved piece part 2 has a substantially semicircular shape, and the bullet part 3 is continuous below one end of the curved piece part 2.

The hook portion 4 is continuous below the other end of the curved piece portion 2 and has a substantially triangular shape, and the stop piece portion 5 is continuous below the hook portion 4 .

The protrusion 6 is located at the base portion B of the hook portion 4 on the curved piece portion 2 side.
is formed.

Each of the above-mentioned parts is integrally manufactured by plastic injection molding or the like, and the overall shape is approximately an inverted U-shape.

Thus, such an elastic stopper 1 is installed in the lower wheel main body 20 to form the lower wheel 30.

The potter's wheel main body 20 includes an inner cavity 21 and a long hole 22, and a potter's wheel part 23 on the outer periphery of the lower end.
However, a string attachment part 24 is formed on the top, and a through hole 25 is bored in the string attachment part 24 in the same direction as the elongated hole 22.

As shown in FIG. 2, the elastic stopper 1 is installed inside the wheel main body 20 so that the hook 4 thereof projects outward from the elongated hole 22.

In this case, the elastic piece part 3 of the elastic stopper piece 1 is on the right inner surface of the peripheral wall of the bottom wheel body 20, and the stopper piece part 5 is on the elongated hole 22.
The curved piece 2 of the elastic stopper 1 can be brought into contact with the lower surface of the upper wall of the lathe main body 20, and the projection 6 can be brought into contact with the upper end of the elongated hole 22, respectively.

The lower wheel body 2 is inserted into the center hole of the upper wheel (not shown).
0 is inserted and the upper wheel is locked by the hooking part 4 of the elastic stopper 1, as shown in FIG.
The elastic stopper 1 is also moved upward by the upward force of the upper wheel.
The curved piece portion 2 and the inner surface of the upper wall of the lower wheel main body 20 come into contact with each other, and the projection 6 and the upper end of the elongated hole 22 come into contact with each other. As a result, the upper wheel and elastic stopper 1
The upward movement of is prevented.

Even after the upper wheel is latched by the elastic stopper 1, the upper power of the upper wheel acts on the latching portion 4;
Since this acting force is borne by the contact portion between the protrusion 6 in that direction and the upper end of the elongated hole 22, the hooking part 4 hardly sinks, and the upper wheel is inadvertently detached from the lower wheel 30. There's nothing to do.

The upper wheel can be removed from the lower wheel 30 by pressing the hook 4 of the elastic stopper 1 with your finger.

If it is pressed down too much, it will become as shown in Fig. 3, but even if the top part A of the hook part 4 comes off the elongated hole 22, the protrusion 6 provided at the base part B will still face into the elongated hole 22. , as soon as you release your finger, it returns to its original state as shown in FIG.

Also, for example, if the size of the long hole 22 becomes smaller than the normal size or the position shifts, the long hole 2
Although the upper end of 2 is lower than normal, and a gap is formed between the lower surface of the upper wall of the bottom wheel main body 20 and the curved piece 2 of the elastic stopper 1, as shown in FIG.
The projection 6 of the elastic stopper 1 comes into contact with the upper end of the elongated hole 22.

Therefore, even in such a case, the same effect as in FIG. 2 described above is achieved, and even in the case of excessive pressing as shown in FIG. 5, the same effect as in FIG. 3 is achieved.

In other words, in the conventional elastic stopper 10 without protrusions,
As shown in FIG. 9, for example, if the elongated hole 22 becomes smaller than normal and its upper end drops, a gap will be created between the curved piece 11 of the elastic stopper 10 and the lower surface of the upper wall of the bottom wheel body 20. . When the hooking portion 13 of the elastic stopper 10 is pushed by the upward force of the upper wheel, the elastic stopper 10 moves upward until the gap disappears, as shown in FIG. sinks and the external impact elasticity weakens.

As a result, there were times when the upper wheel would come off for some reason.

However, with the elastic stopper 1 having the protrusion 6, such a problem can be prevented.

[Brief explanation of drawings]

FIG. 1 is a front view showing an elastic stopper according to an embodiment of the present invention. FIG. 2 is a partially cutaway front view showing a state in which an elastic stopper is installed inside a lathe main body to form a lathe. FIG. 3 is a front view of main parts showing a state where the pressure is too high. FIG. 4 is a front view of the main part when the elongated hole is smaller than the normal size. FIG. 5 is a front view of the main part showing a state in which the item shown in FIG. 4 is pressed down too much. FIG. 6 is a front view showing a conventional elastic stopper. FIG. 7 is a partially cutaway front view showing a state in which the elastic stopper shown in FIG. 6 is assembled and placed on the bottom. FIG. 8 is a front view of the main part showing a state in which the one shown in FIG. 7 is pressed down too much. FIG. 9 is a front view of the main part when the elongated hole is smaller than the normal size. FIG. 10 is a front view of main parts showing a state in which the elastic stopper of FIG. 9 is moved upward. 1... Elastic stop piece, 2... Curved piece part, 3... Elastic piece part, 4... Latch part, 5... Stop piece part, 6... Protrusion.

Claims (1)

[Scope of utility model registration request] A curved piece that has a substantially semicircular shape and can come into contact with the lower surface of the upper wall of the wheel body; A spring piece part that can be fitted together, a catch part that is connected below the other end of the curved piece part and has a substantially triangular shape and can protrude outward from a long hole in the lower wheel main body, and a catch part that is connected below the catch part. A stop piece that can be elastically engaged with the inner surface of the circumferential wall below the elongated hole of the lathe's wheel body, and a stop piece that is formed at the foot of the curved piece side of the hook part so that it always faces into the elongated hole of the lathe's wheel body. An elastic stopper for a lower wheel, characterized by comprising a protrusion that can come into contact with the upper end of a long hole.