JPH07266783A - Writing appliance - Google Patents

Abstract

PURPOSE:To prevent trouble from occurring due to forget of containing a lead by allowing the lead to expose only at a use time of a writing instrument, and automatically containing an end of the lead in the writing appliance body without adding an active operation to a user at the time of unuse. CONSTITUTION:A writing appliance has a hollow-like writing appliance body 10 and a lead 20 disposed on a central axis of the body. The lead 20 of the appliance comprises a retainer 21 so held by guide holes of holders 11, 12 provided in the body 10 and provided at the lead 20 as to be longitudinally movable, pushing parts 14, 15 for pressing the retainer 21 to push the lead 20 to an end side, and an elastic member 30 for always energizing the lead 20 rearward by an elastic force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing tool which is used by exposing and accommodating a core portion from a writing instrument body, and in particular, a writing instrument for automatically exposing and accommodating the core portion and preventing forgetting to accommodate the core portion. Regarding

[0002]

2. Description of the Related Art Generally, a writing instrument including a writing instrument body such as a ballpoint pen and a core is knocked at the time of use, or the core is exposed from the writing instrument body by removing a cap or the like, and is knocked at the time of non-use. Alternatively, the core is housed in the writing instrument body by covering it with a cap or the like so that the core is not exposed to the outside except when necessary.

[0003]

However, such a conventional writing instrument requires a user's active action for accommodating the core, such as covering with a knock or a cap after use. , The user is always troublesome to store the core, and if the user forgets to store the core, the tip of the core will be left exposed.
There are problems that the tip of the core portion is dried and ink is hard to come out, and that the user does not notice that the core is exposed and stains hands, clothes, documents, and the like.

Further, in the space station, the space shuttle, and the manned space system in the orbit around the earth, etc., since it is in a weightless state unlike the earth, the object freely floats in the space without falling down. ,In particular,
Since the tip of the core of a writing instrument such as a ballpoint pen is sharply pointed, it is very dangerous that the core is exposed when not in use and drifts in a space, which may be harmful to the human body.

The present invention has been proposed in order to solve the above problems of the prior art, in which the core is exposed only when it is used, and when it is not used, the user adds an active action. It is an object of the present invention to provide a writing instrument in which the tip of the core portion is automatically stored in the body of the writing instrument without any trouble, and the harmful effects caused by forgetting to store the core portion are prevented.

[0006]

In order to achieve the above object, the writing instrument of the present invention is a writing instrument comprising a hollow writing instrument main body and a core portion arranged on the central axis of the writing instrument main body. A receiving part provided on the core part, an extruding part provided on the writing instrument main body to press the receiving part to push the core part toward the tip side, and the core part is always biased backward by elastic force. And an elastic member, and preferably, the writing instrument main body is covered with an elastic body. Also, if necessary, the push-out portion is formed so as to project from the outer periphery of the writing instrument body, or the push-out portion is formed to be flush with the outer periphery of the writing instrument body, and if necessary, The pushing portion is formed at least at two locations on the outer periphery of the writing instrument body.

[0007]

According to the writing instrument of the present invention having the above-mentioned structure, when the user holds the pushing portion at the time of use, the pushing portion pushes the receiving portion and pushes the core portion toward the tip side. Is exposed from the tip of the writing instrument body and is ready for writing. After use, when the hand holding the writing instrument is released or the force is loosened, the elastic member elastically urges the core part backward, so that the core part is automatically stored in the writing instrument body. .

[0008]

Embodiments of the writing instrument of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a first embodiment of a writing instrument of the present invention, (a) shows an unused state,
(B) shows the time of use, respectively. The writing instrument of the embodiment shown in FIG. 1 includes a hollow writing instrument body 10 and the writing instrument body 1.
And a core portion 20 arranged on the central axis of zero.

The writing instrument main body 10 has a hollow cylindrical body whose tip portion can be attached and detached by a screw, and has guide holes at two or more locations in the longitudinal direction (two locations on the tip side and the rear end side in this embodiment). It has the holding parts 11 and 12 which formed. Also,
The tip portion has a tip hole 13 through which the core portion 20 comes in and out.

The core portion 20 is a holding portion 1 of the writing instrument body 10.
The guide holes 1 and 12 are movably held in the longitudinal direction (lateral direction in the drawing), whereby the tip of the core 20 is provided at the tip of the writing instrument body 10.
It is exposed from. In the present embodiment, the guide portions are provided by penetrating through the guide holes provided in the holding portions 11 and 12, but the present invention is not limited to this as long as the core portion 20 can be movably held. Absent. For example, with respect to the holding portion 11 on the tip end side, the tip end hole 13 can also serve as this.

A receiving portion 21 is provided substantially at the center of the core portion 20. The receiving portion 21 has a wedge shape whose shape is widened toward the tip side so that the core portion 20 moves toward the tip side when pressed from the outside. Further, the core portion 20 is provided with a locking portion 22 between the receiving portion 21 and the holding portion 11, and an elastic member 30 formed of a coil spring is provided between the locking portion 22 and the holding portion 11. It is arranged.
In the elastic member 30, the tip of the core portion 20 has the writing instrument main body 10
In the state where it is exposed from, a force for urging the core portion 20 backward acts. The elastic member 30
In the present embodiment, the coil spring is a coil spring as shown in the figure, but may be rubber, leaf spring or the like as long as it has a constant elastic force.

At least two locations on the outer periphery of the portion of the writing instrument main body 10 to be gripped by fingers are formed with push-out portions 14 and 15 for pushing the receiving portion 21 and pushing the core portion 20 toward the tip side. The push-out portions 14 and 15 are provided with notches, such as a U-shape and a U-shape, at the outer peripheral portion of the writing instrument main body 10 to be held by fingers so that they can be pushed, and the receiving portion 21 is provided at the inner periphery thereof. The pressing pin-shaped members 14a and 15a are fixed to each other, and protrude outward from the writing instrument main body 10 when the writing instrument is not used.

In the present embodiment, the extruding parts 14, 15
The writing instrument main body 10 is formed of a hard plastic or the like having a certain degree of flexibility so that the connecting portion between the writing instrument main body 10 and the writing instrument body 10 will not be cut even if the pressing operation is repeated. The extruding parts 14 and 15 are not limited to the above examples, and the extruding part 1
Reinforcing members may be provided at the connecting portions of the writing instrument body 10 and the writing instruments main body 10, or they may be connected by a hinge. Further, the positions of the push-out portions 14 and 15 and the receiving portion 21 are preferably provided at the positions of the index finger and the thumb that hold the writing instrument body 10 when the user uses the writing instrument.

Reference numeral 40 is an elastic body such as sponge or rubber,
The entire writing instrument body 10 is covered. By providing this elastic body 40, it is possible to further enhance the safety in use in a space navigation body and the like, and by attaching the elastic body 40 to at least the push-out portions 14 and 15, the connecting portion of the writing instrument main body 10 can be secured. It can also be reinforced. It should be noted that the elastic body 40 may be omitted in a normal environment of use on the earth.

According to the writing instrument of this embodiment having such a structure, the user grips the push-out portions 14 and 15 at the time of use, so that the push-out portions 14 and 15 press the receiving portion 21 and the core portion 20. Since it is pushed forward, the core portion 20 is exposed from the tip end hole 13 of the writing instrument body 10 and can be used as a writing instrument. After use, the core 20 is automatically biased rearward by the elastic force of the elastic member 30 simply by releasing the hand holding the writing implement or by loosening the force. It is stored in 10.

Next, a second embodiment of the writing instrument of the present invention will be described with reference to FIG. 2A and 2B are cross-sectional views showing a second embodiment of the writing instrument of the present invention, where FIG. 2A shows the unused state and FIG. 2B shows the used state. In this embodiment, as shown in FIG. 2, the push-out portions 14 and 15 are formed so as to be flush with the outer circumference of the writing instrument body 10 in the unused state. As a result, the shape of the writing instrument body 10 can be made smart, and the appearance, portability, etc. of the writing instrument can be improved.

Next, a third embodiment of the writing instrument of the present invention will be described with reference to FIG. 3A and 3B are partial cross-sectional views showing a third embodiment of the writing instrument of the present invention, wherein FIG. 3A shows an unused state and FIG. 3B shows a used state. In this embodiment, as shown in FIG. 3, the extruded portions 14 and 15 are formed by cutting the outer peripheral portion of the writing instrument body 10 with fingers into an elliptical shape, a quadrangular shape, or the like, and attached to the elastic body 40. It has a fixed structure. In this case, when the writing instrument is used, the push-out portions 14 and 15 are pressed vertically to be used.

With such a structure, it is possible to manufacture the extruded portions 14 and 15 more easily. Even in this embodiment, in the unused state,
The push-out portions 14 and 15 may be formed so as to project to the outside of the writing instrument body 10, or may be formed so as to be flush with the outer periphery of the writing instrument body 10. When the push-out portions 14 and 15 are projected to the outside of the writing instrument body 10, it becomes easy to hold and press the push-out portions 14 and 15 when using the writing instrument, and when they are formed flush with the outer periphery of the writing instrument body 10. The effect is that the appearance, portability, etc. of the writing instrument can be improved.

Next, a fourth embodiment of the writing instrument of the present invention will be described with reference to FIG. 4A and 4B are partial cross-sectional views showing a fourth embodiment of the writing instrument of the present invention, where FIG. 4A shows the unused state and FIG. 4B shows the used state. In this embodiment, as shown in FIG. 4, the pin-shaped members 14a and 15a of the extruded portions 14 and 15 are connected to the wires 14b and 1 having flexibility.
5b, and the receiving portion 21 is provided with an engaging hole or the like, and the hole is configured to receive the wires 14b and 15b. Thereby, the receiving portion 21 and the pushing portion 1
The structure of 4, 15 can be simplified.

[0020]

As described above, according to the writing instrument of the present invention, the core portion is exposed only when the writing instrument is used, and when the writing instrument is not used, the tip of the writing instrument main body is automatically adjusted without any active action by the user. It is housed inside, and it is possible to prevent harmful effects caused by forgetting to store the core.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a writing instrument of the present invention, (a) showing an unused state and (b) showing a used state.

2A and 2B are cross-sectional views showing a second embodiment of the writing instrument of the present invention, in which FIG. 2A shows an unused state and FIG. 2B shows a used state.

FIG. 3 is a partial cross-sectional view showing a third embodiment of the writing instrument of the present invention, (a) showing an unused state and (b) showing a used state.

FIG. 4 is a partial cross-sectional view showing a fourth embodiment of a writing instrument of the present invention, (a) showing an unused state and (b) showing a used state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Writing instrument main body 11 ... Holding part 12 ... Holding part 13 ... Tip hole 14 ... Extrusion part 14a ... Pin-shaped member 14b ... Wire 15 ... Extrusion part 15a ... Pin-shaped member 15b ... Wire 20 ... Core part 21 ... Receiving part 22 ... Locking part 30 ... Elastic member 40 ... Elastic body

Claims (5)

[Claims] 1. A writing instrument comprising a hollow writing instrument main body and a core portion arranged on a central axis of the writing instrument main body, the receiving portion provided on the core portion, and the writing instrument body provided on the writing instrument body. A writing instrument, comprising: an extruding portion that presses the receiving portion to push the core portion toward a tip end side; and an elastic member that constantly urges the core portion backward by elastic force. 2. The writing instrument according to claim 1, wherein the writing instrument body is covered with an elastic body. 3. The writing instrument according to claim 1, wherein the push-out portion is formed so as to project from the outer periphery of the writing instrument body. 4. The writing instrument according to claim 1, wherein the pushing portion is formed flush with the outer periphery of the writing instrument body. 5. The writing instrument according to claim 1, wherein the push-out portion is formed at least at two locations on the outer periphery of the writing instrument body.