JP2009196316A - Ball-point pen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball-point pen which enables easy operation of the knocking operation part of the core body thereof for switching to another writing color selected while writing without gripping the main body shaft again. <P>SOLUTION: The operation members 5 are mounted on the respective rear ends of multiple writing color ball-point pen core bodies 4 stored in the main body shaft 3, and the knocking operation part 14 of the operation member 5 for the selected ball-point pen core body 4 is knocked, thereby the tip 16 on the leading end of the ball-point pen core body 4 can come out of the leading end opening 2a of the mouth end 2 mounted on the leading end of the main body shaft 3. The knocking operation part 14 is provided in an operation range W wherein the knocking operation by the finger tip is possible while the main body shaft 3 stays in the gripped condition for writing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ballpoint pen provided with a knock operation unit for operating a plurality of ballpoint pen cores having different writing colors.

  2. Description of the Related Art Conventionally, multi-color ballpoint pens in which different writing colors, for example, black, red, blue, and other appropriate color ballpoint pen cores are housed in the main body shaft have been widely used (see, for example, Patent Document 1).

  In such a ballpoint pen, operation members are respectively attached to the rear ends of a plurality of ballpoint pen cores housed in the main body shaft, and knock operation portions of the respective operation members are attached to the peripheral wall of the main body shaft for each ballpoint pen core body. In the selected ball-point pen core, each of the ball-point pen cores is exposed to the outside through the slide holes provided in the, and the knock operation part of the ball-point pen core selected from a plurality of different writing colors is knocked with the fingertip and slid in the axial direction. The tip portion of the front end is projected and retracted from the front end opening of the tip portion attached to the front end of the main body shaft.

However, since the knock operation part of each ballpoint pen core is provided at the rear end of the main body shaft far from the fingertip in the gripping state of the main shaft at the time of writing, the ballpoint pen of other writing colors is used during writing. When the core body is selected and switched, there is a problem that it is necessary to change the body axis once.
JP 2001-121882 A

  The present invention provides a ballpoint pen that can easily operate a knock operation unit of a ballpoint pen core of another writing color selected during writing without changing the main body axis in view of the above-described present situation. With the goal.

The above-described problems are solved by the invention having the following configuration, as shown in each of the claims.
(1) By attaching an operation member to each of the rear ends of a plurality of ballpoint pen cores of different writing colors accommodated in the main body shaft, and knocking a knock operation portion of the operation member in the selected ballpoint pen core body, In the ballpoint pen that the tip part of the front end in the core body can protrude and retract from the front end opening of the tip part attached to the front end of the main body shaft,
A ballpoint pen characterized in that the knocking operation portion is provided in an operation range in which a knocking operation with a fingertip can be performed while the main body shaft is held in writing.

(2) In the above item (1), an operating rod provided so as to be slidable in the axial direction of the main body shaft is coupled to the operating member, and the free end portion of the operating rod is extended forward to the operating range. A knock operation section is provided at the end.

(3) In the above item (2), the operating rod can be slidably guided in the axial direction of the main body shaft by a guide member provided on the outer peripheral surface or inner peripheral surface of the main body shaft.

(4) In the above item (2) or (3), an engagement groove is formed in the connection base portion of the operating rod, and the engagement groove is engaged with a slide hole formed in the guide member in the axial direction of the body shaft. In combination, the operating rod can be slidably guided.

(5) In the above item (2), the operating base and the operating rod are connected to each other so that the operating member is movable relative to the operating rod in the axial direction of the main body shaft, A compression spring that biases the operating member toward the axis of the main body shaft is interposed between them.

(6) In the above item (5), an engagement hole is provided through the connection base portion of the operation member in the axial direction of the main body shaft, and the connection hole of the operation shaft is connected to the connection base portion of the operation rod. A locking pin protruding in the axial direction is inserted in a loosely fitted state, and the operating member and the operating rod are connected to each other.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the knock operation portion of each ball-point pen core housed in the main body shaft is provided in an operation range in which an operation with a fingertip can be performed while the main body shaft is held in writing. Therefore, when operating the ball-point pen core during writing, the knock operation part of the ball-point pen core of another selected writing color can be easily operated with the fingertip without changing the main body axis.

  According to the second aspect of the present invention, the operating rod connected to the operating member so as to be slidable in the axial direction of the main body shaft is coupled, and the free end portion of the operating rod is held in the gripping state of the main shaft when writing. Because it extends forward to the operation range of the fingertips and is provided with a knock operation part at its free end, the internal structure in the conventional body shaft can be used as it is, reducing manufacturing costs Can do.

  According to the third aspect of the invention, since the operating rod can be guided to be slidable in the axial direction of the main body shaft by the guide member provided on the outer peripheral surface or the inner peripheral surface of the main body shaft, When operating the unit, the operating rod can be slid stably.

  According to the fourth aspect of the present invention, the engaging groove is formed in the connection base portion of the operating rod, and the engaging groove is engaged with the slide hole formed in the axial direction of the main body shaft on the guide member, thereby Since the scissors can be slidably guided, the operation scissors can be stably slid when the knock operation unit is operated.

  According to the fifth aspect of the present invention, the connecting base portions of the operating member and the operating rod are connected to each other so as to be able to contact and separate toward the axial direction of the main body shaft, and the operating member is interposed between them. Since a compression spring that urges toward the shaft center is interposed, the operation rod follows the movement of the operation member that attempts to sink in the radial direction toward the shaft center of the main body shaft when knocking. Can be prevented from sinking, and rattling can be suppressed, and a smooth switching operation can be performed.

  According to the sixth aspect of the present invention, the engaging hole is provided in the connecting base portion of the operating member in the axial direction of the main body shaft, and the connecting base portion of the operating shaft is connected to the connecting base portion of the operating rod. Since the locking pin protruding in the axial direction is inserted in a loosely fitted state and the operating member and the operating rod are connected to each other, the operating member is directed toward the axis of the main body shaft when knocking. Even if it sinks in the radial direction, the influence is not transmitted to the knock operation rod, and a smooth switching operation can be performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing a gripping state during writing of the ballpoint pen in one embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the ballpoint pen, and FIG. 3 is an enlarged longitudinal section taken along line III-III in FIG. FIG. 4 is a longitudinal sectional view showing a switching operation state of the ballpoint pen core of another selected writing color.

  As shown in FIGS. 1 and 2, the ballpoint pen 1 of the present invention has two left and right inks each storing different writing colors, for example, black and red ink, in a main body shaft 3 having a front end portion 2 attached to the front end portion. The ballpoint pen cores 4 and 4 are accommodated respectively.

  An operation member 5 is attached to the rear end 4a of each ball-point pen core 4, and each of these operation members 5 is rearward (see FIG. 2) by a coil spring 6 wound around the ball-point pen core 4. Is biased upward).

  The rear end portion 5a of each operation member 5 is connected to the rear end portion 7a of the operation rod 7 provided along the axial direction on the outer peripheral surface of the main body shaft 3, and the connection base portion of the operation member 5 is connected to the connection base portion of the operation member 5. The engagement hole 8 is provided so as to extend in the axial direction of the main body shaft 3, and a locking pin 9 is provided so as to project from the connecting base portion of the operating rod 7 toward the axial direction of the main body shaft 3. .

  When the locking pin 9 is inserted into the engagement hole 8 in a loosely fitted state, the operating member 5 and the operating rod 7 are connected to each other, and the operating member 5 is relatively positioned with respect to the operating rod 7. The main body shaft 3 can be moved in the axial direction.

  A compression spring 10 made of a coil spring is interposed between the coupling bases of the operation member 5 and the operation rod 7, and the compression spring 10 has the operation member 5 at the axis of the main body shaft 3. It can be energized towards.

Each operating rod 7 is supported by a guide member 11 having a U-shaped cross section provided along the axial direction on the outer peripheral surface of the main body shaft 3, and at the rear end portion of the guide member 11 in the axial direction of the main body shaft 3. A slide hole 12 is formed along the slide hole 12, and, as shown in FIG. 3, the engagement groove 13 formed in the coupling base portion of the operation rod 7 is engaged with the slide hole 12, so that the operation rod 7 can slide. Guided.
Thus, the operating rod 7 is slidably engaged with the slide hole 12 of the guide member 11 in a state where the operating member 5 is urged toward the axis of the main body shaft 3 by the compression spring 10. ing.

Each operating rod 7 extends forward to an operating range W that can be operated with a fingertip as it is in the gripping state of the main body shaft 3 at the time of writing shown in FIG. 7b is provided with a projecting knock operation section 14, respectively.
In this case, the operation range W that can be operated by the fingertip means that when the body shaft 3 is gripped during writing, for example, when the body shaft 3 is supported by the index finger and the middle finger and the thumb is released, A range in which the thumb can be freely moved in the front-rear direction of the main body shaft 3 from the position of the gripping thumb, preferably a range of about 2 to 3 cm toward the rear.

  As shown in phantom lines in FIGS. 1 and 2, the knock operation unit 14 can be operated in the axial direction of the main body shaft 3 with a fingertip as it is in the gripping state of the main body shaft 3 at the time of writing.

  That is, when the knock operation unit 14 is knocked and the ballpoint pen core 4 is centered, the state shown in FIG. 4 is obtained, and the operation member 5 has the axis of the main body shaft 3 as shown by the phantom line in FIG. However, the connecting base portion at the rear end portion 7a of the operating rod 7 has the engaging groove 13 engaged with the slide hole 12 of the guide member 11, so that the connecting base portion is radially directed toward the axis of the main body shaft 3. Don't sink into.

Further, as shown in FIG. 2, the operation members 5 and 5 attached to the ballpoint pen cores 4 are elastic when the locking release protrusions 15 </ b> A and 15 </ b> B are elastically applied by the urging force of the compression spring 10 when not in use. Can be opposed to each other.
As shown in FIG. 4, these locking release protrusions 15 </ b> A and 15 </ b> B knock the knock operation portion 14 of the operation member 5 on one side and center the one ball-point pen core body 4 toward the front. The centering state is released by the operation of the other operation member 5 that is not centered and is half-knocked so that the centering state is maintained. It is possible to return to.

  In use, the ballpoint pen 1 of the present embodiment pushes the knock operating portion 14 of the desired pen-colored ballpoint pen core 4 forward (downward in FIG. 2) against the urging force of the coil spring 6. Thus, the tip 16 of the ball-point pen core 4 is projected to the outside from the front end opening 2a of the lip portion 2 at the front end of the main body shaft 3, thereby enabling writing.

  After use, the ball-point pen core 4 is pushed downward by the coil spring 6 (upward in FIG. 4) by slightly pushing down the knock operation portion 14 of the other pen-colored ball-point pen core 4. The main shaft 3 is automatically returned.

  In addition, during writing, in order to selectively switch the ball-point pen core 4 of the writing color in the centering state to the ball-point pen core 4 of another writing color, the knock operation unit of the ball-point pen core 4 of another writing color This is done by knocking 14.

In the above embodiment, the operation rod 7 can be guided to be slidable in the axial direction of the main body shaft 3 by the guide member 11 provided in the axial direction on the outer peripheral surface of the main body shaft 3. 11 may be provided on the inner peripheral surface of the main body shaft 3, or a guide groove may be provided on the inner peripheral surface of the main body shaft 3 in place of the guide member 11 so that the operating rod 7 can be guided.
In this case, the knock operation portion 14 provided on the free end portion 7a of the operation rod 7 is exposed to the outside in the operation range W of the outer peripheral surface of the main body shaft 3, thereby being a fingertip that grips the main body shaft 3 at the time of writing. So that it can be operated.
Further, in order to guide the operating rod 7 so as to be slidable in the axial direction of the main body shaft 3, a component of the feeding mechanism in the ball-point pen core 4 that operates by a knocking operation is used without providing the above-mentioned guide means separately. It is also possible to do.

It is a side view which shows the holding state in writing of the ball-point pen in one Embodiment of this invention. Similarly, it is a longitudinal cross-sectional view of a ballpoint pen. FIG. 3 is an enlarged longitudinal sectional view taken along line III-III in FIG. 2. It is a side view which shows the holding state in writing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ball-point pen 2 Front-end | tip part 2a Front end opening 3 Main body axis | shaft 4 Ball-point pen core 4a Rear end 5 Operation member 5a Rear end part (connection base)
6 Coil spring 7 Operating rod 7a Rear end (connecting base)
7b Free end 8 Engagement hole 9 Engagement pin 10 Compression spring 11 Guide member 12 Slide hole 13 Engagement groove 14 Knock operation part 15A Engagement release protrusion 15B Engagement release protrusion 16 Tip part W Operation range

Claims (6)

By attaching an operation member to each of the rear ends of a plurality of ballpoint pen cores of different writing colors accommodated in the main body shaft and knocking a knock operation portion of the operation member in the selected ballpoint pen core body, In the ballpoint pen that allows the tip part of the front end to protrude from the front end opening of the tip part attached to the front end of the main body shaft,
A ballpoint pen characterized in that the knocking operation portion is provided in an operation range in which a knocking operation with a fingertip can be performed while the main body shaft is held in writing.   The operation member is connected to an operation rod provided so as to be slidable in the axial direction of the main body shaft, the free end portion of the operation rod is extended forward to the operation range, and the knock operation portion is provided at the free end portion. Item 1. A ballpoint pen according to Item 1.   3. The ballpoint pen according to claim 2, wherein the operating rod can be slidably guided in the axial direction of the main body shaft by a guide member provided on the outer peripheral surface or inner peripheral surface of the main body shaft.   An engaging groove is formed in the connecting base of the operating rod, and the engaging groove is engaged with a slide hole formed in the guide member in the axial direction of the main body shaft so that the operating rod can be slidably guided. The ballpoint pen according to claim 2 or 3.   The operating base and the operating rod are connected to each other so that the operating member is movable relative to the operating rod in the axial direction of the main body shaft, and the operating member is interposed between them. The ball-point pen according to any one of claims 2 to 4, further comprising a compression spring that urges toward the shaft center.   An engagement hole is provided in the connection base portion of the operation member in the axial direction of the main body shaft, and the engagement hole is provided so as to project from the connection base portion of the operation rod toward the axial direction of the main body shaft. The ballpoint pen according to claim 5, wherein the stop pin is inserted in a loosely fitted state, and the operation member and the operation rod are connected to each other.

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