JPH0615734Y2 - Writing material exchangeable writing instrument - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] According to the present invention, a writing member having a writing portion formed on the front end is housed in a main body so that the writing member can be moved forward and backward, and the writing portion is inserted and removed from the front end of the main body. In particular, the present invention relates to a writing instrument in which a writing section is retracted by itself to be housed in a main body when writing is not performed, and a writing member is replaceable.

Since the writing instrument of the present invention is capless, a ball-point pen (for example, an oil-based ball-point pen) that uses ink that does not require drying prevention, or the ink in the front part of the writing member is dried by devising the position and structure of the air holes. It is suitable for use in a ballpoint pen (for example, a water-based ballpoint pen) that is difficult to do.

[Conventional technology]

2. Description of the Related Art Conventionally, a writing instrument in which a cap is eliminated by knocking or rotating so that a writing unit can be stored in a main body is widely known.

However, such a device has a drawback in that if the user forgets to knock or rotate it and inserts the writing part into the pocket while keeping the writing part protruding from the inside of the main body, the clothes are soiled.

There is also known a writing instrument that can automatically release the engagement of a writing member having a writing portion protruding from the main body by inserting a thin object such as paper between the clip and the shaft.

Further, it is also known that the tip of the ballpoint pen is housed in the tip body by the restoring force of the coil spring when the finger is released from the pusher when not in use (see Japanese Utility Model Laid-Open No. 58-151081). However, the shaft core of this product is so-called disposable because it cannot be replaced.

[Problems to be solved by the invention]

Even with a writing instrument that automatically releases the above-mentioned locking, the writing part may touch the clothes and become dirty during the insertion of the clip into the pocket, or the clip may be thrown into the pocket randomly without inserting it. Then, there is a drawback that the automatic release mechanism is not useful and ink is smeared on clothes.

The present invention automatically writes the writing section as long as the hand is released from the pushing member without performing specially defined operations or actions such as knocking, rotating, inserting a clip into a pocket, etc. To provide a so-called cartridge-type writing instrument that can be stored in the main body, that enables stable writing without wobbling of the writing member during writing, and that allows the writing member to be easily replaced. It is an object.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a writing instrument in which a writing member having a writing portion formed at a front end is housed in a main body so that the writing member can be moved forward and backward, and the writing portion is taken in and out from a front end of the main body. A push member that does not have a locking portion and that can slide along a slit provided in the axial direction is arranged on the outer periphery of the main body so that the outer peripheral surfaces are substantially flush with each other, within the range in which the outer peripheral portion of The receiving member is connected to the pressing member via a cylindrical member that extends rearward from the pressing member and is inserted so as to surround the outside of the writing member around the entire circumference thereof. , The writing member is exchangeably housed so that the rear end is brought into contact with the receiving member,
A biasing means for biasing the writing member together with the receiving member in the backward direction is provided.

[Action]

The present invention is configured as described above, and when the pushing member is pushed out by hand operation with one finger, for example, the thumb while holding the main body, the writing member is extended to the pushing member rearward of the pushing member. Is pushed by a receiving member connected through a cylindrical member that is inserted so as to surround the outer periphery of substantially the entire circumference, and the writing member that is exchangeably accommodated in the cylindrical member also moves forward, The writing portion of the writing member projects from the front end of the main body to enable writing. In this state, the backward urging force of the urging means is not so strong (the urging force may be so weak that the writing portion does not protrude from the tip of the main body when running down stairs). Maintenance is easy.

When writing, writing pressure is applied to the writing member, and the writing member tries to retract, but one of the fingers (the thumb) holding the writing tool faces forward against the writing pressure. As described above, the writing section does not retreat into the main body. Further, during writing, since the writing member is held inside the cylindrical member over the entire outer circumference thereof, stable writing is possible.

When writing is stopped and the hand is released from the pushing member, the writing member retracts by itself due to the retracting biasing force of the biasing means, and the writing section retracts into the main body. The same is true when putting it in your pocket.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a writing instrument showing one embodiment of the present invention.
Since the finger is away from the pushing member, the state is shown in which the writing unit is retracted into the main body.

In the figure, 1 indicates a shaft, and a base 2 is provided at the front end of the shaft 1.
(Which may be made of resin) are joined by means such as screwing.
The shaft 1 and the base 2 constitute a main body. A single slit 3 is provided in the front portion of the shaft 1, and a pushing member 4 guided by the slit 3 and moving in the front-rear direction (axial direction) is fitted into the slit 3. ing.
Dimples, grooves, ridges, and other patterns are engraved on the surface of the pressing member 4 to form finger cues.

The pushing member 4 has a cylindrical member 5 integrated with the pushing member 4.
The receiving member 6 is connected via. A refill (writing member) 7 is exchangeably housed in the cylindrical member 5 with its rear end abutting against the receiving member 6.

Steps 9 and 10 are provided in the base 2 and the refill 7, respectively, and the refill 7 is provided between the steps 9 and 10.
An urging means 8 for urging the vehicle in the backward direction is provided.

In the figure, 11 is a fine air hole provided in the tail plug 7a at the rear end of the refill 7. Since no air hole is provided in the middle diameter portion or the small diameter portion of the refill 7, the writing portion of the refill 7 is described. Ink near 12 is hard to dry. Although 13 indicates a spacer, the spacer 13 is not always necessary. In the state shown in FIG. 1, since the receiving member 6 hits the spacer 13 and is prevented from retreating, there is a slight gap between the rear end of the pressing member 4 and the rear end of the slit 3, but the pressing member 4 May be applied to the slit 3 to prevent the cylindrical member 5 and the receiving member 6 from retracting.

When replacing the refill 7 with a new refill, use the base 2
By twisting and removing it from the shaft 1 together with the biasing means 8, the refill 7 inside can be pulled out from the cylindrical body 5. By inserting a new refill 7 into the cylindrical body 5 and screwing the base 2 having the biasing means 8 into the shaft 1, the state shown in FIG. 1 can be assembled again.

Next, the operation of the above embodiment will be described. When one finger, for example, the thumb is moved backward with the writing instrument of FIG. 1 and the pushing member 4 is pressed against the pushing member 4, the writing state shown in FIG. 2 is obtained.

As described above, the retracting force that the pushing member 4 receives from the urging means 8 via the refill 7, the receiving member 6 that receives the refill 7, and the cylindrical member 5 that is connected to the receiving member 6 is weak as described above. Can be easily maintained.

When writing is performed, writing pressure is applied to the pressing member 4, but since the thumb applied to the pressing member 4 pushes the pressing member 4 in a forward direction against the writing pressure, the writing unit 12 is used as the main body. You can continue writing without leaving.

When the finger pushing the pushing member 4 is released, the pushing force of the pushing member 4 is lost, so the refill 7 is retracted by the biasing force of the biasing means 8, and the writing part 12 is retracted into the main body. Quickly return to the state of FIG.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, the cylindrical member 5 may have a slightly larger inner diameter from the rear to the front, or may be divided into two and the front end may be slightly expanded, so that a new refill can be added to the cylindrical member 5 at the time of refill replacement. It may be easier to insert.

Although an example of a water-based ballpoint pen was shown as a refill,
The present invention can be applied to an oil-based ballpoint pen, and the material, size, and shape of each member are arbitrary, and other design changes can be freely made.

[Effects of the Invention] As described above, according to the present invention, the following effects are achieved.

The pressing member is provided in the front part of the main body in the range where it can be operated at hand, and the writing instrument can be written out by holding the writing instrument with fingers and pushing the pushing member forward with the thumb etc. The writing part can be automatically stored in the main body as long as you remove your finger from the pushing member.
There is no need for a guarantee mechanism to prevent dirt or a storage operation.

Moreover, since the pushing member is used to push forward and write, the writing pressure can be easily received.

Further, since the writing member is housed in a cylindrical member that extends rearward of the pressing member and is inserted so as to surround the outside of the writing member over substantially the entire circumference, the writing member is The outside is held in the cylindrical member over almost the entire circumference, so that stable writing is possible, and the used writing member can be extracted from the cylindrical member and easily replaced.

In addition, by disposing the pulling member on the outer circumference of the main body so that the outer peripheral surfaces are substantially flush with each other, even if the pulling member makes a vigorous exercise with the writing instrument placed in the pocket, the pulling member does not become out of sync with the pocket material in the pocket. There is no possibility of accidental accidents such as retreating due to frictional resistance, exposing the writing part, and polluting the pocket.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing its usage. 1 ... Axis, 2 ... Base, 3 ... Slit, 4 ... Pushing member, 5 ... Cylindrical member, 6 ... Receiving member, 7 ... Refill, 8 ... Biasing means, 12 ... Writing part

Claims (1)

[Scope of utility model registration request] 1. A writing instrument in which a writing member having a writing portion formed at a front end is housed in a main body so that the writing member can be moved forward and backward, and the writing portion is taken in and out from a front end of the main body, and a hand operation of an outer peripheral portion of the main body can be performed. A pushing member that does not have a locking portion and is slidable along a slit provided in the axial direction within the range is arranged on the outer circumference of the main body so that the outer circumferential surfaces are substantially flush with each other. The receiving member is connected via a cylindrical member that extends rearward from the member and is inserted so as to surround the outside of the writing member over substantially the entire circumference, and the rear end of the cylindrical member is the receiving member. The writing member exchange-type writing instrument, wherein the writing member is housed in a replaceable manner so as to be in contact with the writing member, and an urging means for urging the writing member together with the receiving member in the backward direction is provided.