JPH04319499A - Writing utensil having mechanical pencil and multi-lead ball-point pen - Google Patents

Abstract

PURPOSE:To provide a writing utensil improved in user's convenience wherein the constitution of a delivery knock rod is simple and one or more of a mechanical pencil and many ball-point pen leads can be received in an outer shaft. CONSTITUTION:A writing utensil is equipped with at least one mechanical pencil 7 and several ball-point pen leads 8 provided vertically movably in a lower outer shaft 2, a delivery knock rod so provided as to be vertically movable in correspondence with the pencil 7 and the leads 8, a return knock rod 12 provided vertically movably in the center part of the outer shaft 1 and the springs separately provided so as to biase the respective knock rods upwardly. A lead of the delivered pencil 7 is further delivered by the downward movement of the delivery knock rod of the pencil 7.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a writing instrument having a mechanical pencil and a multi-core ballpoint pen.
This writing instrument incorporates at least one single mechanical pencil and several single core ballpoint pens in one outer shaft so that they can be selectively drawn out and used for writing.

0002

BACKGROUND OF THE INVENTION Writing instruments that combine one mechanical pencil and one to three ballpoint pens have been known, and there are also multi-lead ballpoint pens, but in the past, Incorporating a mechanical pencil into the multi-lead ballpoint pen made the outer barrel too thick, making it difficult to use.

[0003] As a conventional multi-core ballpoint pen,
Broadly speaking, the following two methods are known. That is, in the first method, in order to feed out the pen tip of one single-core ballpoint pen to the through hole at the lower tip of the lower outer shaft for writing, the feeding tip corresponding to that one single-core ballpoint pen must be fed out. The knock rod can be extended by pressing down sufficiently against the force of the internal spring. In order to return the extended ballpoint pen single lead, the single lead-out knock rod corresponding to any other ballpoint pen single lead can be pushed down slightly, allowing the restoring force of the spring to return the ballpoint pen. ing. In addition, in the second method, the procedure for feeding out the ballpoint pen single lead is the same as that of the first method, but in order to return the ballpoint pen single lead that has been drawn out, there is a This is done by sufficiently pushing down the returned cap body to push down all the other single core ballpoint pens, and then releasing the pushing force.

0004

[Problems to be Solved by the Invention] However, in the above-mentioned first conventional method, in order to return a ballpoint pen single lead that has been fed out, it is necessary to use one feeding tool corresponding to any other ballpoint pen single lead. This is done by slightly pressing down on the knock rod, so the operation is simple, but the structure and shape of adjacent knock rods and opposing knock rods are related to each other, making it extremely difficult to operate. Because it is complicated, 1
There is a limit to the number of single core ballpoint pens that can be housed inside the outer shaft of a book, currently no more than four, and there are also problems in that the manufacturing costs are extremely high. In addition, in the second method described above, in order to return a ballpoint pen single lead that has been fed out, the return cap body is sufficiently pushed down and all other ballpoint pen single leads are pushed down, so the ballpoint pen single lead that does not need to be returned is pressed down sufficiently. All the springs corresponding to the core are compressed, which is not only unreasonable, but also causes early fatigue of each spring, and the problem is that the force of the fingers of the person pressing down becomes large.

[0005] The present invention is an attempt to solve the above-mentioned problems. That is, the present invention has a simple structure and shape of the dowel rod for feeding out, and at least one single mechanical pencil and a large number of single core ballpoint pens can be housed in one outer shaft, making it easy to use. It is an object of the present invention to provide a writing instrument having a mechanical pencil and a multi-lead ballpoint pen, which is of good quality, can reduce manufacturing costs, has less spring fatigue, and requires less force from a person's finger to press down. It is something to do.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a cylindrical lower outer shaft provided with several longitudinal holes, and a cylindrical lower outer shaft having one through hole at the lower end. a lower outer shaft, an intermediate seat plate provided between the upper outer shaft and the lower outer shaft, and at least one mechanical pencil and several mechanical pencils provided inside the lower outer shaft so as to be movable up and down. A single core ballpoint pen, the lower end of which is inserted and fixed into the upper part of each corresponding single mechanical pencil and single core ballpoint pen by passing through the intermediate seat plate, respectively, and the upper part is guided into the corresponding vertical hole. a knock-out rod that is movable up and down; a spring that is separately provided between each knock-out rod and the intermediate seat plate to constantly bias each knock-out rod upward; and the upper outer shaft. a knock rod for return, the lower end of which is vertically provided in the center of the intermediate seat plate so as to be movable up and down, and the knock rod for return; a spring provided between the intermediate seat plates to constantly bias the return knock bar upward; It has a cam part that abuts the inner side of the upper end and presses the knock rod for drawing out to the outside, and an upper movement locking part that abuts the lower surface of the intermediate seat plate, and the mechanical pencil itself is fed out. However, the lead of the mechanical pencil itself is further drawn out by the downward movement of the knock rod for feeding out the mechanical pencil itself.

[0007]

[Operation] According to the present invention, first, in order to feed out the pen tip of one single-core ballpoint pen into the through hole at the lower tip of the lower outer shaft for writing, the method described in the above-mentioned conventional technique is used. Similarly, the ballpoint pen can be fed out by sufficiently pushing down the knocking rod corresponding to the single lead ballpoint pen against the force of the internal spring. Next, in order to return the single lead ballpoint pen that has been fed out, the cam part provided on the knock rod for return comes into contact with the inner side of the upper end of the knock rod for draw out by pushing down the knock rod for returning. As a result, as described in the first method of the prior art described above, the knock-out rod is returned by the restoring force of the spring. Thereafter, by releasing the pressing force on the return knock bar, the return knock bar is returned to its original state by the restoring force of a spring provided exclusively for returning the return knock bar. .

[0008] In addition, to feed out a single mechanical pencil, as in the case of feeding out a single lead ballpoint pen, when the knock rod for feeding out corresponding to the mechanical pencil is moved downward, the mechanical pencil itself is lowered and the lower outer shaft is moved downward. The tapered portion at the tip of the unit is locked at the through hole at the lower tip, and the core of the unit is paid out by moving the knock bar for feeding downward. In order to return the unit, the operation of the knock rod for return may be performed in exactly the same way as in the case of returning the single lead ballpoint pen described above.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of the invention. Figure 1
4, 1 is a cylindrical upper outer shaft, 2 is a cylindrical lower outer shaft, 3 is an intermediate seat plate provided between the upper outer shaft 1 and the lower outer shaft 2, and 4 is the upper outer shaft. A center knock guide 5 is provided on the inner side of the shaft 1, and a number of center knock guides 5 are provided on the upper outer shaft 1 (in this embodiment, as shown in FIG. 3, one for the mechanical pencil and six for the ballpoint pen). ), 6 is a through hole provided at the center of the lower tip of the lower outer shaft 2, 7 is a single mechanical pencil provided inside the lower outer shaft 2 so as to be movable up and down, and 8 is the lower outer shaft 2. A large number (six in this embodiment) of single core ballpoint pens are provided in parallel inside the shaft 2 so as to be movable up and down, and 9 has a lower end loosely passing through the intermediate seat plate 3 to form the upper end of the single mechanical pencil 7. A knock rod 10 for feeding out a mechanical pencil is inserted and fixed so that its upper part moves up and down guided by a corresponding vertical hole 5, and 10 is a knock rod whose lower end loosely passes through an intermediate seat plate 3 to correspond to each ballpoint pen. A large number (six in this embodiment) of ballpoint pen dispensing knock rods, each of which is inserted and fixed into the upper end of the single core 8 and whose upper end is guided to the corresponding vertical hole 5 to move up and down; Reference numeral 11 denotes springs 1 which are separately provided between the knock rods 9, 10 for feeding out and the intermediate seat plate 3, and always urge the knock rods 9, 10 upward.
Reference numeral 2 denotes a return knock, which is vertically provided in the center of the upper outer shaft 1, and whose lower end is vertically vertically movable through a hole in the center of the intermediate seat plate 3. The rod 13 is a spring 14 which is provided between the return knock rod 12 and the intermediate seat plate 3 and always urges the return knock rod 12 upward.
15 is an elastic rubber cap, 15 is an eraser, 16 is a pipe integrally fixed to the upper end of the return knock rod, 17 is a clip, 18 is a ring, 19 is a ballpoint pen tip, and 20 is the mechanical pencil A spring that acts when the lead of the single mechanical pencil 7 is fed out; 21 is the lead of the mechanical pencil 7; 22 is an upper movement locking portion formed in a step shape at the lower end of the return knock rod 12; knock rod 12
A cam portion 24 is an inner side of the upper end of the knock rod 9 for feeding out a mechanical pencil, and a cam portion 25 is an inner side of the upper end of the knock rod 10 for feeding out a ballpoint pen. The cam portion 23 comes into contact with the inner upper end portions 24 and 25 of the knocking rods 9 and 10 due to the downward movement of the knocking rod 12, and presses the knocking rods 9 and 10 outward. .

A writing instrument having a mechanical pencil and a multi-lead ballpoint pen configured as shown in the figure has one mechanical pencil unit 7 and six ballpoint pen single-core 8, and each of these ballpoint pen single-core 8 They may consist of ink of different colors, lines drawn of different thicknesses, or a combination of both.

First, in order to feed out the ballpoint pen tip 19 of one ballpoint pen single core 8 into the through hole 6 at the lower end of the lower outer shaft 2 for writing, the method described in the above-mentioned conventional technique is used. Similarly, the ballpoint pen can be fed out by sufficiently pushing down the knocking rod 10 corresponding to the single core 8 against the internal spring 11. Next, in order to return the drawn-out ballpoint pen single core 8, by pushing down the knocking rod 12 for returning, the cam portion 23 provided on the knocking rod 12 for returning is moved to the upper end of the knocking rod 10 for feeding out. It comes into contact with the inner part 25, and the knock rod 10 for feeding is moved outward (to the right in FIG. 4).
As a result, the upper end surface of the knock rod 10 for feeding out is displaced outwardly from the lower end surface of the center knock guide 4, and is returned by the restoring force of the spring 11. Thereafter, by releasing the pressing force on the return knock bar 12, the restoring force of the spring 13 provided for returning the return knock bar 12 causes the return knock bar 12 to
is returned to its original state. The return stroke (upward movement) of the return knock bar 12 is stopped when the upward movement locking portion 22 (step) provided on the return knock bar 12 comes into contact with the lower surface of the intermediate seat plate 3.

Further, for drawing out the mechanical pencil 7 for writing, a knock rod 9 for feeding out the mechanical pencil is used.
When the unit 7 is moved downward, the unit 7 is lowered, and as shown in FIG. When the knock rod 9 is moved downward, the spring 20 is compressed and contracted, and as is known, the chuck for feeding out the mechanical pencil lead holding the lead of the unit 7 is released, and the unit 7 is released.
The core 21 is fed out. To return the mechanical pencil unit 7, the spring 20 is compressed by the downward movement of the mechanical pencil retracting knock bar 9, and the lead 21 is returned in a known manner, and then the ballpoint pen single lead 8 is
By pushing down the return knock bar 12 in the same manner as when returning the knock bar 12, the cam portion 23 provided on the return knock bar 12 comes into contact with the upper inner side part 24 of the extending knock bar 9. Push the knock rod 9 outward (Fig. 4).
Then, the upper end surface of the knock rod 9 is moved outward from the lower end surface of the center knock guide 4, and is returned by the restoration of the spring 11.

In this embodiment, the return knock rod 12 is moved downward by manually pushing down the elastic rubber cap 14.

It is preferable that the portions of the knocking rods 9 and 10 around which the spring 11 is wound are bent inward by about 1° to 6° with respect to the center of the lower outer shaft 2. That is, by doing this, the knock rods 9 and 10 are fed out, and the knock rods 9 and 10 are fed out.
, 10 are dropped into the lower end of the center knock guide 4, the lower tips of the single mechanical pencil 7 and the single core ballpoint pen 8 strongly contact the inner wall of the lower outer shaft 2. This prevents the feed from being released inadvertently.

[0015]

[Effects of the Invention] As explained above, according to the present invention,
To return the extended knock rod, push down one of the return knock rods and bring the cam provided on the return knock rod into contact with the inner side of the upper end of the knock rod. It can be returned just by pressing outward, and this is common to all knock-out rods. There is no need to consider the structure and shape relationship with the object, the structure and shape of each knock rod for feeding out is simple, and the knock rod itself for returning is simple,
At least one mechanical pencil and a large number of single core ballpoint pens can be housed in one outer shaft, and manufacturing costs can be reduced. In addition, in order to return the extended dowel rod, only the special spring provided for returning the knock rod is activated, and all the springs corresponding to each knock rod are not compressed. Therefore, the fatigue of all the springs is small, and the force of the person's finger pushing down is also small.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing the mechanical pencil shown in FIG. 1 in an extended state;

FIG. 3 is a sectional view taken along section line A-A in FIG. 1;

FIG. 4 is an enlarged cross-sectional front view of a part of FIG. 1;

[Explanation of symbols]

1: Upper outer shaft 2: Lower outer shaft 3: Intermediate seat plate 5: Vertical hole 6: Through hole 7: Mechanical pencil unit 8: Single core ballpoint pen 9: Dowel rod for mechanical pencil feeding 10: Dowel rod for ballpoint pen feeding 12: knock rod for return

Claims (1)

[Claims] 1. A cylindrical upper outer shaft provided with several vertically elongated holes, a cylindrical lower outer shaft having one through hole at the lower end, and between the upper outer shaft and the lower outer shaft. an intermediate seat plate provided in the lower outer shaft; at least one single mechanical pencil and several single core ballpoint pens provided vertically movably inside the lower outer shaft; a knock-out rod for feeding out which is inserted and fixed into the upper part of each corresponding single mechanical pencil and single lead ballpoint pen, and whose upper part is guided to the corresponding vertical hole so as to be movable up and down; A spring is provided separately between the knock-out rod for feeding out and the intermediate seat plate, and always biases each knock-out rod for feeding upward; A knock rod for return is provided to be vertically movable by passing through the center of the seat plate in the vertical direction, and a knock rod for return is provided between the knock rod for return and the intermediate seat plate to constantly move the knock rod for return. and a spring that biases upward, and the return knock bar is provided with a downward movement of the return knock bar that contacts the inner side of the upper end of each of the payout knock bars to move the payout knock bar outward. a cam portion that presses the mechanical pencil, and an upward movement locking portion that contacts the lower surface of the intermediate seat plate. A writing instrument comprising a mechanical pencil and a multi-lead ballpoint pen, characterized in that the lead of the mechanical pencil itself is drawn out.