JPH0528686U - Multi-core writing instrument - Google Patents

Abstract

(57) [Abstract] [Purpose] A ballpoint pen tip 71, which is a writing body, and a tip 81 of a mechanical pencil, project straight out from the tip end opening 21 of the barrel 1 along the axis, and are easy to write and also preferable in appearance. Provide core writing instruments. A pressing portion 41 of an operating element 4 projects radially from a plurality of window holes 11 formed in the outer peripheral surface of the barrel 10 on the tail end side, and pushes the pressing portion 41 to advance it in the axial direction. And a writing body such as a ballpoint pen core 7 housed in the barrel 10 moves forward to cause a writing portion such as a ballpoint pen tip 71 to protrude from the tip end opening of the barrel and to retract other writing bodies in the forward position. In the writing instrument, a holding member 22 is provided on the inner peripheral surface near the tip of the barrel 10 with its center aligned with the axis of the barrel and in pressure contact with the outer peripheral face of the writing body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-core writing instrument in which a writing body such as a plurality of ball-point pen cores is housed in a barrel.

[0002]

[Prior art and its problems]

 Recently, the number of colors of ball-point pen ink has increased, and multiple ball-point pen cores with about four different ink colors are concentrically arranged in the barrel, and the pen body of the ball-point pen can be selectively opened from the tip opening of the barrel. A multi-core writing instrument with a ball-point pen that is projected to the inside has been put to practical use. The ballpoint pen core, which is a writing body, has a ballpoint pen tip, which is a writing area, attached to the tip of an ink tank made of a synthetic resin pipe with high flexibility such as polypropylene. In such a multi-core writing instrument, color-coded actuators are connected to the tail end of a ball-point pen core, and the pressing portion of the actuator is exposed from a window hole formed in the tail end side outer peripheral surface of the barrel. When the pressing part of the operator of the color to be written is advanced in the axial direction with the fingertip, the ball-point pen core advances and the pen body projects from the tip end opening of the barrel.At this time, the pressing part of the actuator is moved with the fingertip. Since it is also pushed in the direction, the ball-point pen core is slightly displaced toward the shaft center of the shaft cylinder, and the pressing part of the actuator almost enters the shaft cylinder and engages with the locking part of the shaft cylinder to receive the writing pressure. It is like this. In addition, two protrusions, one for driving backward and one for driving backward, are formed on the back surface of the actuator, and the other backward pen for backward driving is in the forward position while the actuator is moving forward. It hits the back-and-forth retracting drive projection of the operator of the core and pushes this core toward the peripheral part from the axial center of the barrel. Therefore, the engagement of the other ball-point pen core operator in the forward position and the locking portion of the barrel is released, and the ball-point pen core is retracted. Further, as a writing body, one using a pencil pencil filling in addition to a ball-point pen core has been put into practical use, but the core case of the mechanical pencil filling is also made of a highly flexible synthetic resin pipe.

In such a multi-core writing instrument, the tip of the ball-point pen core or the mechanical pencil pen in the forward position is slightly deviated toward the axial center of the barrel, but does not coincide with the axial center. On the other hand, since the writing body at the tip projects from the tip opening of the barrel, the ball pen core and mechanical pencil tool in the forward position are arranged at a slight angle to the axis of the barrel. Therefore, the tip of a writing pen, such as a ballpoint pen tip or a mechanical pencil, projects slightly obliquely from the tip opening of the barrel, making it difficult to write and having an unfavorable appearance.

[0004]

[The purpose of the device]

 In view of this, the present invention provides a multi-core writing instrument that is easy to write and has a pleasing appearance because the tip of a writing pen, such as a ballpoint pen tip or a mechanical pencil, projects straight from the tip opening of the barrel along the axis. To aim.

[0005]

[Constitution of the device and its action]

 In order to achieve such an object, according to the present invention, the pressing portion of the actuator is radially projected from a plurality of window holes formed on the outer peripheral surface of the shaft cylinder on the tail end side, and the pressing portion is pressed. When it is moved forward in the axial direction, the writing body such as a ballpoint pen core housed in the barrel moves forward and the writing portion such as a ball-point pen tip projects from the tip opening of the barrel and other writing bodies in the forward position are moved. In the multi-core writing instrument to be retracted, a holding member is provided on the inner peripheral surface near the tip of the barrel, the center of which coincides with the center of the barrel and which is pressed against the outer peripheral surface of the writing body.

That is, the writing body such as the ball-point pen core in the forward position is arranged at a slight angle with respect to the shaft center of the barrel, but the center is located on the inner peripheral surface near the tip of the barrel. Since a holding member that is in contact with the outer peripheral surface of the writing body is provided, the writing body made of highly flexible synthetic resin is curved so that the writing portion such as the ballpoint pen tip is located at the axis of the barrel. A straight projection from the tip opening along.

[0007]

【Example】

 The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 shows a multi-core writing instrument in which three ballpoint pen cores 7 and one mechanical pencil filling 8 are accommodated as a writing body. In FIG. 1, a barrel 10 comprises a rear shaft 1 and a front shaft 2, and the rear shaft 1 and the front shaft 2 are detachably connected by a joint 3. A ball-point pen core 7 filled with oil-based inks of different colors and a mechanical pencil filling 8 are housed in the barrel 10, and one ball-point pen core 7 advances to form a ball-point pen tip 71 which is a writing section. It projects from the front end opening 21 of the front shaft 2. A holding member 22 is provided on the inner peripheral surface of the front shaft 2 near the tip opening 21. As shown in FIG. 2, the holding member 22 is composed of four vertical ribs, and each rib presses against the outer peripheral surface of the ball-point pen core 7 or the sharp pencil core 8 in the forward position, but connects the tip surfaces of the ribs. The center of the imaginary circle coincides with the axis of the front axis 2. The holding member 22 is not limited to the rib and may be an annular protrusion. As shown in FIG. 4, four longitudinally elongated window holes 11 are formed in the rear shaft 1 at equal intervals, and vertical ribs 12 are formed at the back of the window holes 11. The lower end edge of the vertical rib 12 is the locking portion 13.

At the tail end of a ball-point pen core 7 whose ink tank is made of a highly flexible synthetic resin pipe, a ball-point actuator 4 colored in the same color as the color of the filled ink is connected, An actuator 5 for a mechanical pencil is connected to the tail end of a mechanical pencil filling 8 whose core tank is also made of a highly flexible synthetic resin pipe. The actuator 4 has a pressing portion 41 protruding from the outer surface thereof, and a backward driving protrusion 43 and a backward driven protrusion 42 vertically formed on the inner surface thereof. A pressing portion 41 projects radially from the window hole 11 of the rear shaft 1. On the inner surface of the operator 5, a backward driving projection 52 and a backward driven projection 51 are formed vertically, but the operator 5 has a clip 6 integrated therein, and the clip 6 extends from the window hole 11 to a diameter. Protruding in the direction. The actuator 4 and the actuator 5 are elastically urged rearward by the return spring 9. When not in use, the tip 81 of the mechanical pencil tool 8 and the ballpoint pen tip 71 of the ballpoint pen core 7 are both immersed in the tip shaft 2. is doing.

Therefore, when writing with a ball-point pen, the pressing portion 41 of the ball-point pen actuator 4 of a predetermined color is pressed with the fingertips and moved forward in the axial direction. At this time, since the pressing portion 41 is also pressed in the radial direction by the finger tip, the ball-point pen core 7 is slightly displaced toward the center of the barrel 10, and the pressing portion 41 enters the rear shaft 1 as shown in FIG. The retracted drive protrusion 42 is located at the center of the rear shaft 1, and the top surface of the operator 4 engages with the locking portion 13 to receive the writing pressure. At the same time, the ball-point pen tip 71 projects from the front end opening 21 of the front shaft 2 to be in the state shown in FIG. Therefore, the ball-point pen core 7 in the forward position is slightly inclined with respect to the axis of the barrel 10. However, since the tip of the ball-point pen core 7 is held by the holding member 22 whose center coincides with the axis of the barrel 10, the ink-tank ball-pen core 7 made of a highly flexible synthetic resin pipe is slightly Curved and the ballpoint pen tip 71 projects straight out of the tip opening 21. Therefore, it is easy to write and is preferable in appearance.

Next, when writing with a mechanical pencil, the upper end of the clip 6 is pressed with a fingertip to advance in the axial direction. Also in this case, the mechanical pencil tool 8 is slightly displaced toward the center of the barrel 10, and the backward drive projection 52 of the actuator 5 is located at the center of the rear shaft 1. Abut against the backward drive protrusion 42 and push it outward. Therefore, the engagement between the top surface of the actuator 4 and the locking portion 13 is released, the ball-point pen core 7 is retracted, the ball-point pen tip 71 is retracted from the front end opening 21 of the front shaft 2, and the tip 81 is replaced instead. It projects from the opening 21. Also at this time, the mechanical pencil tool 8 is held by the holding member 22, so the mechanical pencil tool 8 is slightly curved, and the tip 81 is projected straight from the tip opening 21. Therefore, also in this case, it is easy to write and is preferable in terms of appearance.

[0011]

[Effect of the device]

 As described above, the multi-core writing instrument of the present invention holds the inner peripheral surface near the tip of the barrel with the center aligned with the center of the barrel and pressed against the outer peripheral surface of the writing body such as the ballpoint pen core. Since the parts are provided, the writing part such as the ballpoint pen tip of the writing body made of highly flexible synthetic resin, which is placed at a slant with respect to the axis of the barrel, is the tip along the axis of the barrel. It projects straight out of the opening. Therefore, it is a multi-core writing tool that is easy to write and has a favorable appearance.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a partial cross-sectional view of a rear shaft.

[Explanation of Codes] 10 Shaft cylinder 1 Rear shaft 11 Window hole 12 Vertical rib 13 Locking part 2 Front shaft 21 Tip opening 22 Holding member 3 Joint 4 Ballpoint pen operator 41 Pressing part 5 Mechanical pencil actuator 6 Clip 7 Ballpoint pen Core 71 Ballpoint Pen Tip 8 Mechanical Pencil Tool 81 Tip Metal 9 Return Spring

Claims (1)

[Scope of utility model registration request] 1. A pressing portion of an actuator protrudes in a radial direction from a plurality of window holes formed in an outer peripheral surface of a shaft cylinder on a tail end side, and when the pressing portion is pressed to advance in an axial direction, the shaft cylinder is moved. In a multi-core writing instrument in which a writing body such as a ballpoint pen core housed inside advances and a writing portion such as a ballpoint pen tip projects from the tip end opening of the barrel and retracts another writing body in the forward position, the barrel A holding member is provided on the inner peripheral surface in the vicinity of the tip of the center member, the center of which coincides with the axis of the barrel and which is in pressure contact with the outer peripheral surface of the writing body.
A multicore, characterized in that a writing portion of a writing material made of a highly flexible synthetic resin, which is arranged at a slight angle with respect to the axis of the barrel, projects from the tip opening along the axis of the barrel. Writing instrument.