JPH0314208Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a hammer tip member for a pachinko machine that is attached to the tip of a pinball mallet for a pachinko machine.

(Prior art) Conventional hammer tip members for pachinko machines are usually made of metal coiled mallet tip springs. It takes a lot of work to attach the ball so that the center of the annular ball-hitting surface matches the center of the short mallet tip, and even when attached to the pachinko machine as a handle set after attaching it to the short mallet tip, the thickness of the plywood plate The center of the tip of the coiled mallet tip spring and the center of the pachinko ball located at the base of the ball hitting rail deviate from the proper ball hitting position due to a slight error in the ball hitting position, and this adjustment work was also required. . Furthermore, this coiled mallet tip spring suffers from metal fatigue during long-term use, which affects the flight of the ball and produces a high-pitched ball hitting sound. Therefore, the present applicant proposed a cylindrical cap-shaped hammer tip member made of an elastic plastic material and having a wide ball-hitting surface at the tip, as shown in Japanese Utility Model Publication No. 58-18942.

(Problem that the invention aims to solve) However, the cylindrical cap-shaped hammer tip member made of elastic plastic material lacks elasticity when trying to make it sufficiently durable. If so, the strength would be insufficient, and if the hammer tip was not bonded to the short rod, it would become misaligned during use, resulting in problems such as long-term durability.

(Means for solving the problems) The present invention was completed with the aim of creating a hammer tip member for pachinko machines that solved the problems mentioned above.
A coil spring is embedded and integrated into a cylindrical cap made of an elastic plastic material with the tip of the head as the ball-striking surface, leaving at least the base portion of the coil spring for attachment to the short hammer tip. be.

(Function) The device configured in this way is forcibly fitted into the short mallet tip of a pachinko machine with the opening at the lower end, and the mallet tip is tightened by the strong holding force of the metal coil spring, similar to the conventional mallet tip spring. It is attached to a short rod, and the ball is hit using the ball hitting surface at the tip of the head of the cylindrical cap made of elastic plastic material.

(Example) Next, the present invention will be explained in detail with reference to the illustrated embodiment. 1 is a wear-resistant elastic plastic material such as polyurethane rubber, polyamide resin filled with carbon fiber, or fluorine resin. This is a cylindrical cap made of , a cylindrical or spindle-shaped coil spring 4 is disposed within the cylindrical cap 1 at least at its base 1 to 3.
The inner part of the winding is left as an attachment part 4a to the short hammer tip protruding inward from the hole wall surface 1a of the cylindrical hole, and is embedded and integrated by an insert molding method. The coil spring 4 may be an unwound type with no grinding applied to the end of the winding, but the base end has a cylindrical shape around the entire circumference as in the first embodiment shown in FIG. Either the cap 1 should be on the same plane as the lower end opening of the cylindrical hole and should be the part that cuts into the base of the short hammer tip, or the cap should be made with about 3 turns as in the second embodiment shown in Fig. 3. It is preferable that the spring contacting part protrudes from the lower end opening of the cylindrical hole, and this protruding part is used as the attachment part 4a to the hammer tip member, and the cylindrical cap 1 is made of an elastic plastic material having electrical conductivity. It is more preferable to do so because stains due to static electricity are less likely to occur.

(Effect of the invention) When such a hammer tip member for a pachinko machine is used by fitting it into the mallet tip short rod 11 with the lower end opening as shown in FIG. The integrated metal coil spring 4 has at least the inner part of the base protruding inward from the hole wall surface 1a of the cylindrical cap 1, leaving it as an attachment part 4a to the short hammer tip rod. , the short hammer tip rod 11 is well held by the base of the coil spring 4,
The coiled spring 4 of the present invention is similar to the conventional coiled hammer tip spring in that it does not fall off during use even without the use of adhesive, unlike when it is made only of elastic plastic material. Since it is embedded and integrated within the cylindrical cap 1 made of plastic material, the ball-hitting surface 3 at the tip becomes the tip of the flat and wide head 2, which causes variations in the winding end position of the coil spring 4. Even if the pachinko ball is installed so that the center of the ball hitting surface 3 is slightly shifted from the center of the pachinko ball located at the base of the ball hitting rail due to an error in the thickness of the plywood board, the ball can be hit properly. The effort required for installation, adjustment, etc. can be significantly reduced. Furthermore, since the ball is fired by the elasticity of the head 2 of the cylindrical cap 1 made of an elastic plastic material and the elasticity of the coil spring 4, it has the same elasticity as a conventional hammer tip member made only of an elastic plastic material. There is no risk of problems with durability due to shortages or insufficient strength, and furthermore, the coil spring 4 does not come into direct contact with your fingers when installing and removing it from the short hammer tip rod 11, so it is easy to use while working. It won't hurt your fingers. However, in order to manufacture such a hammer tip member for a pachinko machine, it can be easily obtained by a spring insert molding method in which the coil spring 4 is set in advance in a mold for molding a cylindrical cap, so the material of the coil spring 4 and the This has the advantage that specifications such as wire diameter and pitch spacing can be reduced compared to conventional coiled mallet tip springs, and the advantage is that it can be provided at a low cost.

Therefore, the present invention has extremely great practical value as it solves the problems of conventional hammer tip members for pachinko machines.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of the present invention, FIG. 2 is a partially cutaway front view similarly shown in a state of use, and FIG. 3 is a partially cutaway front view showing a second embodiment of the present invention. FIG. 1: Cylindrical cap made of elastic plastic material, 2: Head, 3: Ball hitting surface, 4: Coil spring, 4
a: Attachment part to the hammer tip member.

Claims (1)

[Scope of utility model registration request] A coil spring 4 is installed in a cylindrical cap 1 made of an elastic plastic material with a ball hitting surface 3 at the tip of the head 2.
At least at its base is a mounting part 4a for attaching the short hammer tip to the short rod.
A hammer tip member for a pachinko machine, characterized in that it is embedded and integrated with the remaining parts.