JPH04117790U - Cap for writing instruments etc. - Google Patents

Abstract

(57) [Summary] [Structure] A cap A in which an outer cylinder part 1 and an inner cylinder part 2 are connected by a bridge part 3, and a ventilation hole 14 is provided in the bridge part 3 to communicate the outside world and the inner hole, A rib 15 connecting the outer cylinder part 1 and the inner cylinder part 2 is provided on the bridge part 3. [Effects] The cap has ventilation holes that allow air to easily pass through, and the crosslinked portion has strength, making it difficult to deform or break during molding or transportation.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

Fountain pen, small tube writing instrument, handwriting corrector, handwriting eraser, brush, eyeliner, lipstick A cap for collars, nail collars, etc., which is a ventilation hole that communicates the outside world with the inner hole. This invention relates to a cap provided with.

0002

[Conventional technology]

The vent that communicates the outside world with the inner hole is designed to prevent children from accidentally swallowing the cap. This is provided on the cap for the purpose of preventing suffocation.

0003 As an example, the cap has a double structure in which the outer cylinder part and the inner cylinder part are connected by a bridge part. shall be made of an injection-molded product made of a resin with a vent hole provided in the crosslinked part be.

0004

[Problem that the idea aims to solve]

Ventilation holes must have a large cross-sectional area and short ventilation distance, as they must allow air to pass through easily. It is preferable that the

0003 However, when the ventilation distance is shortened, the wall thickness of the bridge becomes thinner, increasing the cross-sectional area. This reduces the proportion of flesh in the cross-linked area, creating ventilation holes that allow air to pass through easily. The more you try to do this, the less the strength of the cross-linked part will become insufficient, which will cause problems during molding, transportation, and even during use. There is also a high possibility that the crosslinked portion will be deformed or damaged after it reaches the user's hands.

0004

[Means to solve the problem]

This invention is based on injection molding of a resin with a double structure that connects the outer cylinder part and the inner cylinder part with a bridge part. The cap is made of a molded product, and has a ventilation hole in the bridge portion that communicates the outside world with the inner hole. In the pipe, the bridging portion is provided with a rib that connects the outer cylindrical portion and the inner cylindrical portion. The gist is the cap of a writing instrument, etc., which is a symbol.

[0005]

【Example】

An example will be explained based on the attached FIGS. 1 to 3. Cap A is made of polyethylene, poly Injection molding of synthetic resins such as propylene, nylon, polyacetal, and polyester It is made of a shaped article and has an outer cylinder part 1 and an inner cylinder part 2. Bridge between outer cylinder part 1 and inner cylinder part 2 3 is located at the open end of the inner cylindrical part 2, and the shape of the inner hole 4 of the cap A is changed to the inner deep part 5 with a small diameter. and the large-diameter insertion port 6 are connected by a tapered wall surface 7. Ru.

[0006] The annular inward protrusion formed in the inner deep part 5 is a sealing part 8 for the main body B. For example, as shown in Figure 3, the outer wall of the main body B is press-fitted to seal the main body tip 9. Ru. Further, reference numeral 10 denotes an inner part that is non-sealingly fitted with the annular bulge part 11 of the main body B. The side protrusion 12 is a protrusion provided to prevent rattling when the cap is attached. Ru. In addition, the main body B in Fig. 3 has a pen tip made of a fiber convergence body. However, it may be appropriate.

[0007] Moreover, the bridge part 3 is connected to a cylindrical space 13 between the outer cylinder part 1 and the inner cylinder part 2. A vent hole 14 and a lip located on the side of the cylindrical space 13 and connecting the outer cylinder part 1 and the inner cylinder part 2. 15 is provided. When viewed in the axial direction, the vent hole 14 is located in the middle of the inner protrusion 10. The rib 15 is located in the middle of each vent hole 14. However, the top of rib 15 does not reach the inward protrusion 10. In addition, the figure shows the inner protrusion 10 and the ventilation hole. 14. As for the ribs 15, there were four ribs arranged at 90 degrees to each other, The number and shape are appropriate.

[0008] Although the above explanation has been made by way of example, various other methods can be used. For example, if the rib 15 It can also be provided on the inner hole 4 side of the bridge portion 3. In addition, the bridge portion 3 is connected to the open end of the inner cylinder portion 2. Rather than positioning the cylindrical space 13 between the outer cylinder part 1 and the inner cylinder part 2, For example, at the respective tops of the outer cylinder part 1 and the inner cylinder part 2. It is also possible to connect them.

[0009]

[Effect of the idea]

The cap for writing instruments, etc. according to the present invention connects the outer cylindrical part and the inner cylindrical part with a bridge part. It is made of a resin injection molded product with a double structure, and has ventilation holes that communicate with the outside world and the inner hole. In the cap provided on the bridge part, the bridge part has an outer cylinder part and an inner cylinder part. Since connecting ribs are provided, strength can be added to the bridge, and the passage provided in this bridge can be By shortening the ventilation distance of the pores, reducing the wall thickness of the bridge, and increasing the cross-sectional area of the ventilation holes. Even if the proportion of flesh in the bridge is reduced, it is difficult to create air holes through which air can easily pass. Even if it is installed, it is possible to prevent the bridge from deforming or breaking during molding or transportation. Wear.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1.

FIG. 3 is an explanatory diagram of the device in FIG. 1 in use.

[Explanation of symbols]

A Cap B Main body 1 Outer cylinder part 2 Inner cylinder part 3 Bridge part 4 Inner hole 5 Deep inside 6 Insertion port 7 Tapered wall section 8 Sealed part 9 Main body tip 10 Inner protrusion 11 Annular bulge 12 Protrusion 13 Cylindrical space 14 Ventilation hole 15 Ribs

Claims (1)

[Scope of utility model registration request] 1. A cap made of a resin injection molded product having a double structure in which an outer cylindrical part and an inner cylindrical part are connected by a bridge part, and a vent hole communicating with the outside world and the inner hole is provided in the bridge part. A cap for a writing instrument, etc., characterized in that the bridging portion is provided with a rib that connects the outer cylinder part and the inner cylinder part.