KR940007202Y1 - Cap for pen - Google Patents

Abstract

No content.

Description

Pen structure of the pen

1 is a longitudinal sectional view showing the configuration of one embodiment of the cap structure of the present invention.

* Explanation of symbols for main parts of the drawings

1: Front shaft 2: Pen body bowl support member

3: vent hole 4: insertion cylinder

5: pen body 6: cap

7: vent hole 8: inner tube

9,12 spring 10: protective cap

11: guide member 8b, 10a: spring locking step

8c, 10d, 11a: Ventilation groove

The present invention relates to a structure of a cap that covers a pen body when a liquid pen is accommodated, and more particularly, to a cap structure of a pen that can prevent liquid from evaporating from a vent hole in the periphery of the pen body and the front shaft.

In the case of a pen using a liquid, it is necessary to prevent the liquid from evaporating from the periphery of the pen body and the vent hole of the front shaft when the pen body is stored. Therefore, the inner cap is integrated into the cap attached to the front end of the front shaft. By installing, the end face of the inner cap was pressed against the end face of the pen body retaining part attached to the front end of the front shaft. And the vent hole of the front shaft formed in the pen body holding member was blocked by the end surface of the inner cap which covers the pen body from the inner cap.

However, since the front shaft and the pen body holding member are separate parts, an error occurs in the length from the front end surface of the front shaft to the seam surface of the pen body holding member, and an error also occurs from the front inner surface of the cap to the seed surface. As a result, when the seal is formed on the end surface of the inner cap integrated with the cap, a gap is formed on the seal surface or, on the contrary, the contact position is shifted to the rear, which may cause a problem in the engagement between the front shaft and the cap. There was problem to be.

To solve this problem, when the outer periphery seal is fitted to the inner periphery of the inner cap to the outer periphery of the insertion cylindrical portion for inserting the pen body concentrically installed on the end surface of the pen body holding member, the outer periphery of the insertion cylinder and the inner gap Is sealed, the pen body is pressurized or depressurized when the cap is detached from the front axle, and as a result, ink leaks from the pen body and the vent hole, or conversely, the liquid in the pen body is returned to the rear side. There was a problem that this was happening.

The present invention has been devised to solve the above problems, and can absorb the error of the dimensions of each member, and can prevent the liquid from evaporating from the vent holes in the periphery and the front axis of the pen body. The purpose is to provide a cap structure of.

The present invention for achieving the above object, in the cap structure of the front shaft having a vent hole, the pen body disposed on the front shaft side, and the pen cap which covers the pen body, the concentric image ( An inner passage having an end face closing the vent hole when the cap is attached to the front shaft, and supported to retreat concentrically in the inner cylinder. When mounted in the configuration is characterized in that the protective cap is provided to cover the pen body to be airtight.

According to the present invention configured as described above, since the inner cylinder and the protective cap are respectively supported in the cap to move forward and backward independently, even if there is an error in the dimension of each member, the vent hole formed at the front shaft side by the end surface of the inner cylinder It is closed so that the pen body can be covered by the protective cap to be hermetically sealed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a longitudinal cross-sectional view showing an embodiment of the cap structure of the pen of the present invention, the pen body holding member (2) is provided concentrically on the front end of the front axis (1) of the pen, the pen body holding member In the vicinity of the outer circumference of (2), the vent hole 3 is formed in communication with the front shaft 1 in the axial direction. In addition, while the insertion cylinder portion 4 is concentrically installed on the outer surface of the pen body holding member 2, the shaft portion of the pen body 5 is inserted into the insertion cylinder portion 4. In addition, the cap 6 is attached to the front end outer circumference of the front shaft 1 so that the cap 6 can be easily detached, and near the proximal end of the front shaft 1 and the locking projection 6a formed in the vicinity of the opening end of the cap 6. The engaging projection 1a formed on the outer circumference is engaged with the elastic force so that the cap 6 is positioned on the front shaft 1 and is caught.

In addition, a vent hole 7 protruding inwardly is formed in the center of the front end bottom surface of the cap 6 in the axial direction, and in the cap 6, an inner cylinder 8 having a bottom is moved forward and backward in the axial direction. A central hole 8a is formed in the front end bottom center of the inner cylinder 8 in the axial direction. The center hole 8a is fitted to the outer circumference of the vent hole 7 so as to be able to slide easily in the axial direction. Moreover, the annular end surface opposite to the bottom part of the inner cylinder 8 touches the outer surface of the pen body holding member 2 so that the ventilation hole 3 can be closed.

The spring engaging step 8b protrudes from the outer periphery of the annular end surface of the inner cylinder 8, and the outer periphery of the spring engaging step 8b is in sliding contact with the inner circumference of the cap 6, so that the inner cylinder 8 Axial fluctuations in the cap 6 of the c) are prevented from interfering with the spring catching step 8b and the center hole 8a. In addition, a ventilation groove 8c penetrates in the axial direction on the outer circumference of the spring catching step 8b so that air at both sides of the spring catching step 8b communicates with each other.

In addition, a coil spring-shaped spring 9 is installed between the spring catching step 8b and the inside of the front end bottom of the cap 6 so that the inner cylinder 8 is in contact with the pen body holding member 2. I'm pushing to move. Moreover, the movement of the inner cylinder 8 is regulated by the convex part 6b formed in the inner periphery of the cap 6.

On the other hand, in the inner cylinder (8), a protective cap (10) having a cylindrical bottom is mounted to retreat concentrically in the axial direction. The center of the bottom surface of the protective cap (10) protrudes in the axial direction. The circumferential guide member 11 is formed integrally. And the guide member 11 is inserted to slide freely in the vent hole 7 formed in the cap 6, while the vent groove 11a is formed in the circumferential direction of the guide member 11 in the axial direction. have.

In addition, the outer circumference of the spring engaging step 10a is formed on the outer circumference of the opposite annular end surface with respect to the side where the guide member 11 of the protective cap 10 is formed, and the outer circumference of the spring engaging step 10a is inner cylinder 8. In the sliding contact with the inner circumference of the), the axial shaking in the inner cylinder 8 of the protective cap 10 is prevented by these spring engaging steps 10a and the guide member 11. In addition, a vent hole 10b is formed in the outer circumference of the spring catching step 10a so as to allow air to both sides of the spring catching step 10a to communicate with each other.

A coil spring-shaped spring 12 is installed between the spring engaging step 10a and the inside of the front bottom surface of the inner cylinder 8 to move the protective cap 10 in the direction of contact with the insertion cylindrical portion 4. It pushes and the movement of the protective cap 10 is controlled by the convex part 8d formed in the inner periphery of the inner cylinder 8. As shown in FIG. On the other hand, the inlet end surface of the insertion cylindrical portion 4 is a tapered surface, and the tapered surface 10b formed on the annular end surface is in contact with the protective cap 10.

Next, the operation of the present embodiment configured as described above will be described.

When the cap 6 is mounted on the front shaft 1 to engage and position the engaging protrusions 1a and 6a formed on each of them, the inner cylinder 8 is pen-holding member 2 by the spring force of the spring 9. It will be pressed toward). And the annular end surface of the inner cylinder 8 contacts the surface of the pen body holding member 2, and closes the ventilation hole 3, and blocks the outside air in the front shaft 1. As shown in FIG. At the same time, the protective cap 10 is pressed toward the insertion cylindrical portion 4 by the spring force of the spring 12 so that the tapered surface 10b formed on the annular end surface of the protective cap 10 is the inlet side of the insertion cylindrical portion 4. It comes in contact with the end surface, and as a result, the air flow into the protective cap 10 is blocked, and the liquid can be prevented from evaporating from the periphery of the pen body 5.

In this state, air in and out of the cap 6 is communicated through the ventilation grooves 8c and 11a and the center hole 8a, and air in and out of the inner cylinder 8 is communicated through the ventilation grooves 10f and 11a. Therefore, when the cap 6 is mounted on the front shaft 1, the inner cylinder 8 and the protective cap 10 can freely move forward and backward in the axial direction. Moreover, the distance from the front end surface of the front shaft 1 to each front end surface of the pen body holding member 2 and the insertion cylindrical part 4 is set to A and B, respectively, and the locking projection 1a of the front shaft 1 is carried out. When the distance from the front end to the front end is C and D, respectively, even if there is an error in the distance A, B, C, D, the inner cylinder 8 and the protective cap 10 move independently, The seal is completely sealed and the front shaft 1 and the cap 6 are completely engaged.

When the cap 6 is peeled off from the front shaft 1, the inner cylinder 8 and the protective cap 10 are caught by the convex portions 6b and 8d formed in the cap 6 and the inner cylinder 8, respectively. Dropping out is prevented. Here, in the state where the cap 6 is attached to the front shaft 1, the distance between the convex portion 6b and the rear end of the spring engaging step is E, and the distance between the convex portion 8d and the rear end of the spring engaging step is When F, the axial length of the vent hole 7 is set to G, and the axial length of the center hole 8a is set to H, E <H, F <G, the cap 6 is moved to the front shaft 1 Even if peeled off, the inner cylinder 8 and the protective cap 10 are retained at the central position in the cap 6, respectively. As a result, when the cap 6 is attached and detached with respect to the front shaft 6, it is possible to prevent a problem that the center of the inner cylinder 8 and the protective cap 10 are displaced, thereby preventing damage to the pen body 5.

On the other hand, even when the cap 6 is removed from the front shaft 1, even if the cap 6 is accidentally swallowed, since the inside and the outside of the cap 6 are always in communication with the outside air through the ventilation grooves 10b and 11a, the engine It is possible to avoid the danger that (organs) are blocked and choking.

In addition, the inner cylinder 8 and the protective cap 11 described above are preferably formed of an elastic material such as synthetic rubber or polyethylene, so that the sealing effect is improved.

In the present embodiment, the pen body holding member 2 is installed at the front end of the front shaft 1 so that the pen body 5 can be replaced. For example, the pen body 5 can be directly replaced by the front side ( Of course, it can also be applied to a type that is fixed in (1) and then discarded.

As described above, according to the present invention, since the inner cylinder and the protective cap mounted in the cap can independently move forward and backward, the vent hole on the front shaft can be completely closed and the pen body can be completely covered so that the vent hole and the periphery of the pen body can be completely covered. It is possible to prevent the liquid from evaporating from.

Claims (5)

A cap structure of a pen having a front shaft having a vent hole, a pen body disposed on the front shaft side, and a cap for covering the pen body, the cap structure being supported so as to be able to move back and forth concentrically in the cap 6. (6) is mounted on the front shaft (1) and the inner cylinder (8) having an end surface for closing the vent hole (3) and is supported to retreat concentrically forward within the inner cylinder (8) and the cap (6) Cap structure of the pen, characterized in that it comprises a protective cap (10) for covering the pen body (5) to be airtight when the front shaft (1) is mounted. The guide member (11) having ventilation flaws (11a) on the outer surface of the bottom inner surface of the protective cap (10) is concentrically installed, the guide member (11) of the cap (6) Cap structure of the pen, characterized in that inserted into the vent hole (7) formed in the center of the end so as to slide freely. The pen structure of claim 1, wherein an annular end surface of the protective cap 10 is disposed so as to contact an end surface into which the base of the pen body 5 toward the front shaft 1 is inserted. . The outer peripheral of the inner cylinder (8) and the protective cap (10) is formed with spring catching steps (8b, 10a), respectively, these spring catching steps (8b, 10a) and the cap (6). ) And a spring (9, 12) is provided between the inner surface of the end surface of the inner cylinder (8) for pushing the inner cylinder (8) and the protective cap (10) toward the front shaft (1), respectively. Cap structure. 5. The pen according to claim 4, wherein vent grooves (8c, 10d) are formed on the outer periphery of the spring catching step (8b, 10a) formed at the outer periphery of the blade and the protective cap (10). Cap structure.