JP6108813B2 - Slim type ballpoint pen - Google Patents

Description

  The present invention relates to a ballpoint pen that realizes a writing state by advancing due to the pressing of a knock, and more particularly to a slim-type ballpoint pen that can be designed to have a small diameter cylindrical shaft.

The applicant has so far proposed the configurations of various types of ballpoint pens and filed patent applications.
For example, in the ballpoint pen shown in Patent Document 1, by providing an outer cylindrical portion that can be screwed with the writing instrument body, in use, the writing instrument body is covered from the outside, thereby enabling gripping with an appropriate thickness. On the other hand, when not in use, the core or nib is covered from the outside to protect against breakage or damage due to dropping or vibration. It can also be prevented.

In the ballpoint pen of Patent Document 2, by providing a damper element with a specific configuration in the shaft cylinder, the resilience of the refill spring can be relaxed as necessary when retreating and reversing the rotation. A comfortable knocking operation can be realized.

  However, in order to enable speedy writing with compact support in a pocket and simple gripping, a slim type ballpoint pen having a shaft cylinder with a small diameter has been demanded in recent years.

  Nevertheless, in Patent Documents 1 and 2, no special design ingenuity has been made in order to realize a slim type ballpoint pen. There is no change in the case of other known documents.

JP-A-11-342696 JP 2002-307892 A

  SUMMARY OF THE INVENTION An object of the present invention is to propose a slim type ballpoint pen configuration capable of reducing the diameter of a shaft cylinder in particular in order to realize support in a pocket in a compact state and speedy writing.

In order to achieve the above object, the basic configuration of the present invention is such that a base is detachably screwed to the front end and a knock is engaged with the rear end in a state in which the knock is movable in the front-rear direction. A refill having a pipe and a nib for storing ink along the front is stored in a state where it can be moved in the front-rear direction through the forward pressing by the knock and the elastic force behind the spring. In the ballpoint pen that is stretchably fixed between the rear end and the spring stopper fixed at the rear end of the refill, a stopper spring that can be pressed from behind is provided for the spring stopper. projecting the two legs rearward from the pressing unit, whereas than the spring stop in the middle part of the leg portion of the side against the hole provided in the barrel at the rear, movable in the longitudinal direction state at The other leg is provided with a linear region extending from the rear end side fixed by the knock to the front side along the longitudinal direction of the shaft tube, and the rear from the pressing portion. A partial region or a whole region extending to the side is connected to the linear region so as to intersect with each other, thereby having an elastic force exerting portion that presses against the spring in the front-rear direction, and from the rear end to the inner wall A canopy is provided in a state of surrounding the knock, and the protrusion on the inner diameter side on the rear end side of the crown and the outer wall of the knock and the protrusion on the outer diameter side on the tip side of the knock and the crown Both inner walls are set to be slidable with respect to each other, and the crown can be fitted with a partial region on the rear side of one leg of the stopper spring from the front end to the rear middle part. It has a elongated slit, the scan caused by operation of the finger with respect to the knock The tip of the pen by the upper spring, spring stopper, movement of the refill to the front side, insertion into the elongated slit in a partial region of the one side leg accompanying the movement, and contact with the rear end of the elongated slit While the writing state based on maintaining the protruding state from the base of the stopper is realized, the insertion of the one leg portion into the elongated slit based on the movement of the stopper spring inward from the hole caused by the finger pressing against the protrusion After removing the state, the refill caused by the elastic force in the extending direction of the spring, the spring stopper, the stopper spring, and the movement of the knock to the rear side, and the protrusion in the outer diameter direction on the tip side of the knock based on the movement The shape of the pen tip in the base of the pen tip due to the contact between the protrusion and the protruding part toward the inner diameter side at the rear end of the crown and the pressing state along the front-rear direction It consists of a slim-type ballpoint pen that realizes an unwritten state based on maintaining the state .

  In the present invention based on the basic configuration, the writing state and the pen tip due to the protrusion from the tip of the pen tip are simple, with the stopper spring and the crown being interposed between the spring stopper and the knock for the refill. It is possible to perform a state where writing is not performed due to the storage in the base, and the original function as a ballpoint pen can be exhibited.

  In addition, since the width in the direction perpendicular to the longitudinal direction of the stopper spring that governs the forward movement of the writing stage and the backward movement of the storage stage can be set to about 4 to 5 mm, the shaft cylinder is compared with the conventional cam system. Can be designed to be in a very small state, and consequently slim type.

  Furthermore, at the stage where writing is not performed, the refill and its tip are connected via the spring by a simple operation of pressing the projection on the one leg portion of the stopper spring protruding from the hole of the shaft tube into the hole of the shaft tube. By retracting the pen tip, it is possible to store the pen tip inside the base.

In the said basic structure, it is a sectional side view which shows the state in the stage of writing. In the said basic structure, it is a sectional side view which shows the state of the stage which is not writing. It is a perspective view which shows the state of a crown. It is a sectional side view which shows the engagement relationship of the crown and stopper spring in an Example, (a) has shown the state of the stage which is writing, (b) is the stage of not writing. Indicates the state. It is a side view which shows the shape of a stopper spring, Comprising: (a) has shown embodiment whose elastic-force display part is substantially U shape in the other side leg part of a stopper spring, (b) is elastic. An embodiment in which the force exerting portion is substantially S-shaped is shown.

  As is clear from the basic structure, in the slim type ballpoint pen of the present application, as shown in FIGS. 1 and 2, the base 2 is detachably screwed to the tip, as shown in FIGS. The pipe 6 for storing ink along the longitudinal direction of the shaft cylinder 1 engaged with the knock 6 so as to be movable in the front-rear direction and the refill 3 having the pen point 31 are pushed forward by the knock 6 and A spring stopper 4 is housed in a state in which it can move in the front-rear direction via an elastic force to the rear of the spring 5 and the spring 5 is fixed at the rear end of the base 2 and the rear end of the refill 3. It is based on the technical premise that it is fixed in a stretchable manner in between.

  However, the stopper spring 7 and the crown 8 are provided between the spring stopper 4 and the knock 6 that support the rear end side of the refill 3 and abut the rear end of the spring 5 disposed around the refill 3. There is a basic feature point in providing.

As shown in FIGS. 1 and 2, the stopper spring 7 has two leg portions projecting backward from the pressing portion 71 pressing the spring stopper 4, and one of the leg portions of the stopper spring 7 protrudes backward. A projection 72 that fits into a hole 11 provided in the shaft cylinder 1 behind the spring stopper 4 is provided in the middle part, and the other leg portion is a shaft from the rear end side that is fixed by the knock 6. A linear region 73 extending to the front side along the longitudinal direction of the cylinder 1 and a partial region or the entire region extending from the pressing portion 71 to the rear end are joined to the linear region 73 in a crossing manner. Thus, an elastic force exerting portion 74 in the front-rear direction is provided.
In FIG. 1 and FIG. 2, when the entire region extending from the pressing portion 71 to the rear end corresponds to the elastic force exerting portion 74, it is indicated by a dotted line, and a partial region is an elastic force exhibiting portion. A case corresponding to 74 is indicated by a solid line.

  The basic shape of the canopy 8 is as shown in FIG. 3, and is installed in a state of surrounding the knock 6 from the rear end to the inner wall of the shaft tube 1. The protrusion 81 on the inner diameter side and the outer wall of the knock 6 and the protrusion 61 on the outer diameter side on the tip side of the knock 6 and the inner wall of the crown 8 are set to be slidable with respect to each other.

  As shown in FIG. 1, the crown 8 has an elongated slit 82 in which the entire region or a partial region of the one leg portion of the stopper spring 7 can be fitted from the front end to the rear middle portion, As shown in FIG. 2, there is a wall portion behind the midway portion where the rear portion comes into contact when the fitting state is canceled due to the pressing of the protrusion into the shaft tube 1. To do.

  At the stage of writing, as shown in FIG. 1, the stopper spring 7, the spring stopper 4, and the refill 3 are advanced by pressing the knock 6 forward due to the operation of the finger, and the pen tip 31 is moved forward. Although it is in a state of protruding from the base 2, a partial region on the rear side of the one leg portion of the stopper spring 7 is fitted into the elongated slit 82 of the crown 8 (however, in FIG. 2 shows a state in which only the rear end side is fitted.) After realizing the contact between the rear end portion of the rear end side region and the rear end portion of the elongated slit 82, the stopper spring 7 and the spring 5 are provided. Can be maintained in a state where the pen tip 31 of the refill 3 protrudes from the base 2.

  At the stage where writing is not performed, as shown in FIG. 2, the elongated shape in the crown 8 of the one leg portion of the stopper spring 7 is caused by the movement of the finger 11 against the protrusion 72 by the finger toward the inside of the hole 11. The refill 3, the spring stopper 4, the stopper spring 7 and the knock 6 are moved to the position of the rearmost end by the elastic force in the extending direction of the spring 5 after eliminating the fitted state from the slit 82. At this time, the rear end region of the one leg portion is in contact with the inner wall of the crown 8 located on the rear side of the elongated slit 82 and the outer diameter of the knock 6 on the front end side. The projecting portion in the direction abuts against the projecting portion 81 toward the inner diameter side at the rear end portion of the crown 8 and presses in the front-rear direction, so that the state where the pen tip 31 is housed in the base 2 can be maintained. it can

  As shown in FIGS. 1 and 2, the canopy 8 forms a cylindrical shape around the knock 6 in most cases, but the projecting portion 81 and the knock on the inner diameter side at the rear end of the canopy 8 The outer wall 6 and the projecting portion 61 on the outer diameter side at the tip of the knock 6 and the inner wall of the crown 8 are both slidable, so that the forward movement state as shown in FIG. A reverse state as shown can be realized.

  As shown in FIG. 3, the projecting portion 81 toward the inner diameter side at the rear end portion of the crown 8 often adopts an annular shape, but other than the annular shape, for example, the central axis of the shaft tube 1 is used. As a reference, an embodiment in which a substantially radial gap is formed can also be adopted.

  Further, the projecting portion 61 to the outer diameter side at the tip portion of the knock 6 is also usually in the shape of a ring, but like the projecting portion 81 of the crown 8, the center axis of the barrel 1 is used as a reference. Embodiments that form substantially radial gaps can also be employed.

  The elastic force in the front-rear direction of the stopper spring 7 is combined in a crossed state with the linear region 73 extending forward along the longitudinal direction from the rear end side fixed by the knock 6 at the other leg portion. It is generated by the elastic force exerting part 74 extended from the pressing part 71, and the spring stopper 4 fixed to the rear end of the refill 3 is maintained in a pressed state by such an elastic force.

  1 and 2 show that the elastic force exerting portion 74 is coupled to the linear region 73 ′ extending rearward from the pressing portion 71 in the other leg portion of the stopper spring 7 in an intersecting state, and is substantially linear. The embodiment characterized by being is shown.

  However, the elastic force exerting portion 74 is not limited to such a linear shape.

  That is, as shown in FIGS. 5A and 5B, in the other leg portion of the stopper spring 7, the elastic force exerting portion 74 intersects the linear region 73 ′ extending rearward from the pressing portion 71. Embodiments that are combined in a state and are substantially U-shaped or substantially S-shaped can also be employed.

In the embodiment, as shown in FIG. 3 and FIGS. 4A and 4B, in the crown 8, the longitudinal direction of the shaft tube 1 from the rear end side fixed to the knock 6 among the other leg portions. Is provided with another elongated slit 82 that can be fitted to a part of the region other than the linear region 73 extending forward.

  Specifically, the region other than the linear region 73 refers to a partial region of the elastic force exerting portion 74 or a linear region 73 ′ extending rearward from the partial region and the pressing portion 71. However, FIGS. 4A and 4B show a state where both the partial region and the extended linear region 73 ′ are fitted.

  FIG. 4A corresponds to a state in which one leg is inserted into the elongated slit 82 in a stage where writing is not performed, and FIG. This corresponds to the state in which the fitted state of the side leg portion and the elongated slit 82 is eliminated, but as shown in FIGS. 4A and 4B, the other side leg portion has other states at any stage. It is in an inserted state with the elongated slit 82.

  Thus, in the embodiment, the stopper spring 7 and the crown 8 can be fitted by realizing the fitting between the elongated slits 82 on both sides of the crown 8 and the one leg and the other leg of the stopper spring 7. In a state where the pen tip 31 protrudes from the base 2 at the stage of writing and the storage state in the base 2 of the pen tip 31 at the stage of writing is in a safe and stable state. It can be.

  As described above, the present invention enables a wide range of applications as a compact type ballpoint pen.

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 11 Hole of shaft cylinder 2 Cap 3 Refill 31 Pen tip 4 Spring stopper 5 Spring 6 Knock 61 Projection part to the outer diameter side in the front-end | tip part of a knock 7 Stopper spring 71 Press part 72 with respect to the spring stopper in a stopper spring One side Protrusions 73 in the leg portion A substantially linear region 73 ′ extending from the rear end fixed to the knock and extending in the longitudinal direction A substantially linear region 74 extending rearward from the pressing portion The elastic force exerting part 8 The crown 81 Protruding portion 82 on the inner diameter side at the rear end of the crown, an elongated slit at the crown

Claims (4)

A refill having a pipe and a pen point for containing ink along the longitudinal direction of the shaft cylinder engaged with the base at the front end so that the base is detachably attached and the knock at the rear end is movable in the front-rear direction. A spring that is housed in a state in which it can move in the front-rear direction via a forward pressing by a knock and an elastic force behind the spring, and the spring is fixed at the rear end of the base and the rear end of the refill A ballpoint pen that is elastically fixed between the stopper and the stopper is provided with a stopper spring that can be pressed from behind against the spring stopper, and the stopper spring is provided with two legs from the pressing portion toward the rear. projecting, whereas against the middle portion of the leg portion of the side at the rear than the spring stop in a hole provided in the barrel, provided with a projection which is fitted in a state capable of moving in the longitudinal direction, the other The legs of A linear region extending from the rear end side fixed by the hook to the front side along the longitudinal direction of the shaft cylinder, and a partial region or all region extending from the pressing portion to the rear side are the straight lines. It is equipped with an elastic force exerting part that presses against the spring in the front-rear direction by crossing with the cylindrical area, and a crown is provided around the knock from the rear end of the shaft tube along the inner wall The projecting portion toward the inner diameter side on the rear end side of the crown and the outer wall of the knock, and the projecting portion toward the outer diameter side on the tip end side of the knock and the inner wall of the crown are set to be slidable with respect to each other. The crown has an elongated slit in which a part of the rear side of the one leg portion of the stopper spring can be fitted from the front tip to the rear halfway portion, and the finger can act on the knock. Before the cause of the stopper spring, spring stopper, refill And maintaining the protruding state from the base of the nib by fitting into the elongated slit in a partial region of the one leg portion accompanying the movement and contacting with the rear end of the elongated slit. On the other hand, on the other hand, on the basis of the movement of the stopper spring from the hole to the inside caused by the finger pressing against the protrusion, the insertion state with respect to the elongated slit of the one side leg is eliminated. The refill, spring stopper, stopper spring and knock rearward movement caused by the elastic force in the direction of extension of the outer diameter, and the outer diameter protrusion and the rear end of the crown on the tip side of the knock based on the movement By the contact with the protruding part on the inner diameter side and the pressing state along the front-rear direction, an unwritten state based on maintaining the storage state in the base of the nib is realized. Slim ballpoint pen it is.   The elastic force exerting portion is coupled to the linear region extending rearward from the pressing portion in an intersecting state in the other leg portion of the stopper spring, and is substantially linear. Slim type ballpoint pen.   In the other leg portion of the stopper spring, the elastic force exerting portion is coupled in a crossing manner with a linear region extending rearward from the pressing portion, and is substantially U-shaped or substantially S-shaped. The slim-type ballpoint pen according to claim 1, wherein: The crown has another elongated slit that can be fitted to a portion of the other leg portion other than the linear region, according to any one of claims 1, 2, and 3. Slim type ball-point pen as described in the paragraph.

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