JPH0999690A - Knocking type writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent clothes from being spotted by a writing when inserted in clothes, and manufacturing it at low cost with good abilities. SOLUTION: In a clip, a shaft part is formed in the inside of a shaft cylinder 1, and a hole is made in the guide for accepting the shaft part 2-b respectively. When the writing utensil is housed, the pressing part on the rear of the clip is pressed downward so as to lift up an engaging ball higher than the outer diameter of the shaft and allow the clip to rotatably swing about the shaft part. An elastic body 4 Is interposed between the clip and the guide so that the clip engaging ball moves at all times in rolling and swinging manners in the diameter-directional inner part of the shaft. Furthermore, in order to permit the clip engaging ball to rotate and swing always in the diameter-directional inner part of the shaft, a contact member being at all times in contact with the rear end of a refill is provided on the inner part of the clip shaft, and also an interstice L Is defined allowing for a range where the clip can rotate and swing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called knock-type writing instrument in which a refill, which is a writing body, projects by writing by pushing a knocking rod at the rear end, and when writing in a pocket, a clip and a barrel are provided. The present invention relates to an improvement in a safety mechanism that does not stain clothes because a locking portion is released and a refill is stored. Particularly, the present invention relates to an improvement of a knock type ball-point pen aiming at improvement of certainty of operation and operability in the case of inexpensive structure.

[0002]

2. Description of the Related Art In a conventional capless knock type ball-point pen that does not require cap removal, the front end face of the shaft is open, and the structure is such that the refill is pushed out by pushing the knock bar for writing. For this reason, if you forget to store the refill when you store it in the pocket, the refill will remain protruding from the axis, and there will be an accident that the pocket is stained with ink. In order to solve this problem, when the writing instrument is inserted into the pocket by locking it with the window of the clip, a device is devised so that the refill is always stored, or the window is provided on the shaft and the locking portion is provided on the ball portion of the clip. A device having the same operation has been proposed. However, these require the processing of windows and locking parts in metal clips, which is expensive and has a problem in workability, sacrificing the durability of the spring properties of the clip, and increasing the number of parts. Existed. In particular, with a safety mechanism that prevents the clothes from being soiled with a knock type, when the knock bar is pushed and the refill is projected and then stored, it is pushed by pushing the rear end side of the clip and lifting the clip ball to lock it. It is generally adopted to release and store the refill, but in this case a strong spring property is taken into consideration in consideration of repeated durability of locking and releasing, so the force required for releasing is required. It was difficult to set a load that was easy to use. Furthermore, when the clip is made of resin, there is also the problem of creep due to insufficient heat resistance, and there are problems that it is necessary to further strengthen the spring property and add a metal reinforcing plate to prevent creep bending. .

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is mainly intended to improve a popular type ball-point pen, and to smoothly operate the refill in a projecting operation or a retracting operation, and to keep writing without alienating a pocket. Prevents accidents that stain clothes when stored in the container, and solves the problem of cost and assemblability at the same time by using a very inexpensive component shape as a mechanism that makes it easy to project and store the refill. It is desired to do. In addition, even if the clip is made of resin, it satisfies the demand to secure a reliable operation with a weak spring property that does not easily creep, and the configuration to guarantee the same reliable operation as when it started to creep. It is intended to solve the problem of providing a knock-type writing instrument.

[0004]

In order to achieve the above object, a knock type writing instrument of the present invention has a refill having a writing portion at the tip, a spring 6 for biasing the refill, and a rear end surface of the refill. Knock portion 5 protruding from the shaft cylinder 1
And has a knock portion 5 pressed to refill the barrel 1
When the clip locking ball 2-a is locked to the window 1-a of the barrel 1, the projected state is maintained. A guide 3 is provided between the knock portion 5 and the refill in front of the knock portion 5.
Is press-fitted or is integrally molded. A pressing portion 2-d that is pressed at the time of releasing the lock when the refill is stored in the rear of the clip 2 and an upright portion 2-e on the inner side of the barrel 1.
And a shaft portion 2-b serving as a rotation center. The guide hole is provided with a receiving hole 3-c that allows the clip shaft portion 2-b to be loosely fitted and rotated, and the clip 2, the guide 3 and the knock portion 5 are interlocked with each other so that the refill can be rocked back and forth. , A stopper 3-a that restricts backward movement when retracted backward
The stopper groove 1-c of the shaft cylinder 1 is provided in an appropriate size. Further, the shaft cylinder 1 has a clip upright portion 2-e which can be moved back and forth and a guide groove 1-b which serves as a rotation stop. Further, a weak elastic body 4 is provided between the clip 2 and the guide 3 for urging the clip locking ball 2-a so as to always rotate and swing inward in the axial direction. As another means, an abutting piece 2-c that abuts the rear end portion of the refill is made to protrude from the front end of the guide 3 inside the barrel 1 of the clip 2 so that the clip 2 can rotate and swing. By providing a certain gap L, the biasing force of the spring 6 that biases the refill axially rearward is used for the rotational swinging force of the clip 2.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiments will be described below in detail. 1 to 6 show a first embodiment of the present invention. As shown in the figure, a ball receiving seat with an ink introducing hole is provided in the center of the inside of the refill, which is made of a transparent or translucent resin and stores the ink inside, and is formed by the axial rear end of the chip and the receiving seat. The non-return ball loosely fitted into the valve chamber makes it possible to communicate from the ink storage part to the writing part ball during normal writing. It is a knock-type writing instrument having a so-called medium-viscosity ballpoint pen refill having a ballpoint pen refill having a structure that prevents the above.

This knock-type writing instrument has a refill having a writing portion at the tip, a spring for biasing the writing portion rearward, and a knock portion which abuts the rear end surface of the refill and projects from the barrel. By pushing the knock part and projecting the refill from the front part of the shaft cylinder, the projecting state is achieved.At this time, the clip locking ball sinks into the window of the shaft cylinder, and when the knock cap part pressing is stopped, the locking ball Holds the protruding state by being locked to the window of the shaft. A guide is provided between the knock portion and the refill in front of the knock portion, and the knock portion and the guide are press-fitted or integrally molded.

A pressing portion, which is pressed at the time of releasing the lock when the refill is stored, is provided on the rear side of the clip, and an upright portion and a shaft portion serving as a rotation center are provided on the inner side of the barrel. The guide shaft is provided with a receiving hole that allows the clip shaft portion to be loosely fitted therein so that the clip shaft portion is rotatable. The clip, the guide, and the knocking part are interlocked with each other to allow the refill to swing forward and backward, and the stopper and the stopper groove of the shaft cylinder, which are used to regulate the backward movement at the time of rearward storage, are provided in appropriate sizes. Further, the shaft cylinder is provided with a guide groove that allows the clip rising portion to move back and forth and serves as a rotation stop.

Further, a weak elastic body is provided between the clip and the guide for urging the clip locking ball so as to always rotate and swing inward in the axial direction, thereby enabling a stable locking operation. When pressing the clip pressing part when releasing the lock, the clip can be rotated and oscillated around the receiving hole of the guide, so the lever can be used and the resistance can be made slight by rotation, so that the lock ball of the clip can be weakened. The lock can be released by lifting it from the lock window of the shaft.

Another aspect of the present invention is to provide a gap L within the range in which the clip is rotatable and swingable by projecting an abutting piece that abuts the rear end of the refill from the front end of the guide inside the axial cylinder of the clip. With this structure, the biasing force of the spring biasing the refill axially rearward is utilized as the rotational swinging force of the clip. In the present invention, an elastic body is used in combination, but the same effect can be obtained by adopting each independently.

Other embodiments of the present invention include, in addition to those described above, a so-called water-based ballpoint pen in which the ink is a normal water-based ink and the ink occluder uses batting, which is a fiber bundle, and a highly viscous oil-based ink. An oil-based ballpoint pen that uses ink, a knock-type writing instrument that uses a refill such as a so-called felt-tip pen or marker that uses a fiber bundle at the tip of the pen or the capillary phenomenon inside, and a metal to further reinforce the springiness of the clip. The thing which added the spring plate of this to a clip etc. can be employ | adopted suitably. The same effect of the present invention can be expected with these embodiments.

[0011]

The operation of the present invention will be described with reference to examples. In a knock-type ballpoint pen in which a refill, which is a writing body, projects from the tip of the shaft to enable writing by pressing the knocking part that projects rearward of the shaft, the locking part of the clip and the window of the shaft are locked. This keeps the refill protruding, so the lock is released when the clip ball is lifted and the refill is automatically stored, preventing the pen tip from sticking into the pocket and soiling clothes. it can. In addition, since it is possible to set the pressing force of the pressing part of the clip that is lighter than before, it is possible to improve the feeling of operation and prevent the clip from creeping. Therefore, no functional problem occurs.

[0012]

The configuration and operation of the knock-type writing instrument of the present invention are as described above, and not only satisfy the function of the knock-type writing instrument with high safety, which has the effect of not causing a serious accident such as dirty clothes. Therefore, it becomes possible to provide an easy-to-use writing instrument that can be easily used by the user. Further, the creep phenomenon of the clip can be prevented, and even if the clip is creeped, the clip is lightly operated by the rotating operation, so that no functional problem occurs. Not only the component structure is simplified, but it is not necessary to select an expensive resin having high heat resistance, so that it is possible to provide a stable product that is inexpensive and has good functionality and long-term durability.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an entire writing instrument which is an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a rear end portion of a writing instrument that is an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view showing the tip of a writing instrument that is an embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of the writing instrument according to the embodiment of the present invention when it is protruding.

FIG. 5 is a vertical sectional view of a locking operation of the writing instrument according to the embodiment of the present invention.

FIG. 6 is an external view of a clip component of a writing instrument that is an embodiment of the present invention.

FIG. 7 is an external view of a guide component of a writing instrument that is an embodiment of the present invention.

[Explanation of symbols]

 1 Shaft 1-a Window 1-b Guide groove 1-c Stopper groove 2 Clip 2-a Locking ball 2-b Shaft part 2-c Abutment piece 2-d Pressing part 2-e Standing part 2-f Protrusion 3 Guide 3a Stopper 3b Elastic part 3c Receiving hole 3d Spring receiver 4 Elastic body 5 Knock part 6 Return spring 7 Tail plug 8 Follower rod 9 Follower 10 Tube 11 Ink 12 Joint 13 Check ball 14 Tip 15 Tip spring 16 Tip sealant

Claims (3)

[Claims] 1. A refill having a writing portion at its tip, a spring 6 for biasing the writing portion rearward, and a knock portion 5 which is loosely fitted so as to be interlockable with the refill and protrudes from the shaft cylinder 1, and the knock portion 5 is provided. Press to push the window 1-a of the barrel 1 and the clip 2
The refill is locked by the locking ball 2-a of
In a knock-type writing instrument which is projected from the front part of the body and holds the protruding state, the clip 2 has a shaft part 2 inside the barrel 1.
-B for the guide 3 and the receiving hole 3 for receiving the shaft portion 2-b
When the clip locking balls 2-a are recessed inward in the radial direction of the shaft cylinder 1 when the writing parts are projected from the tip of the shaft cylinder 1, and when the writing part is stored. When the pressing portion 2-d behind the clip 2 is pressed downward in the axial direction to lift the locking ball 2-a above the outer diameter of the shaft, the clip 2 can rotate and swing around the shaft portion 2-b. A knock-type writing instrument characterized by being configured as described above. 2. An elastic body 4 having elasticity is provided between the clip 2 and the guide 3 so that the clip locking ball 2-a always rotates and swings inward in the radial direction of the shaft. The knock-type writing instrument according to claim 1. 3. A contact piece 2-C is provided inside the shaft 1 of the clip 2 so that the clip locking ball 2-a always contacts the rear end of the refill so that the clip locking ball 2-a always swings inward in the radial direction of the shaft. The knock-type writing instrument according to claim 1, characterized in that the clip (2) has a gap (L) that allows the clip (2) to swing and swing.