JPS62117797A - Composite writing utensil - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a composite writing instrument consisting of, for example, a mechanical pencil and a ballpoint pen, and more particularly to a composite writing instrument with an improved pen feeding mechanism for selectively feeding out a plurality of pen holders.

[Conventional technology]

Conventional composite writing instruments of this type have at least two different writing styles, such as a mechanical pencil and a ballpoint pen, in one outer barrel.
The pen shafts of the book are each slidably inserted in the direction of one sleeve,
Each of these pen shafts is provided with a dedicated pen feeding mechanism as a means for selectively feeding it out from the tip of the outer cylinder according to the writing style, and these pen feeding mechanisms are actuated by the knock operation of each system to draw out the sharp pen shaft. It is configured to selectively extend the pen shaft of a pen, ballpoint pen, or the like.

[Problems to be solved by the invention]

However, the above-mentioned conventional writing instruments require at least two dedicated pen feeding mechanisms, which are the same number as the pen holders, so the structure is complicated due to the large number of parts, making the entire writing instrument larger and increasing the cost. There have been many problems in that the assembly and disassembly and the knocking operation for selectively extending the pen barrel are complicated and are likely to cause malfunctions. This invention was made to solve the above problem, and allows multiple pen holders of different writing types to be easily selected and reliably operated using a single select ring provided on a single wooden knock holder. The object of the present invention is to obtain a composite writing instrument that can reduce the number of parts, simplify the structure, reduce costs, and improve operability.

[Means to solve the problem]

The composite writing instrument of the present invention has a plurality of pen shafts, each of which is biased in the backward direction, housed at regular intervals in the circumferential direction of the shaft in an outer cylinder so as to be able to independently slide in the axial direction. A knock shaft that is biased in the backward direction is inserted into the cylinder so as to be slidable in the axial direction, and the movement of the knock shaft in the axial direction is restricted to a fixed position, so that the knock shaft is placed in the lower position of the outer cylinder in each of the pen shafts. A select ring is provided that selectively engages the rear end of the pen shaft by lowering its own weight.

[For use]

In this invention, when the knock shaft is knocked, the select ring, which is engaged with the rear end of the pen shaft at the lower part of the outer cylinder due to its own weight, moves forward together with the knock shaft. Only the lower pen shaft is selectively extended from the tip of the outer cylinder. Therefore, if the outer cylinder is rotated in the axial direction to displace another pen shaft below the outer cylinder, the select ring selects that pen shaft in the same manner and extends it.

【Example】

Embodiments of the present invention will be described below based on the drawings. First, in Fig. 1, reference numeral 1 denotes an outer cylinder that is the main body of the composite writing instrument, and a wooden knock shaft 2 is inserted into the rear inside of this outer cylinder l so that it can slide in the axial direction. has been done. Near the front end side of this knock shaft 2, there are a plurality of knock shafts (Miki in the illustrated example) arranged at regular intervals in the axial direction inside the outer cylinder l.
Pen holders 3 to 5 are arranged so as to be slidable in the axial direction. As shown in FIG. 2, each of the pen holders 3 to 5 consists of a sleeve in which a slit 6 is provided along the axial direction in a part of the respective peripheral wall, and the sleeve is connected to the rear end of the sleeve to extend the rear part of the peripheral wall. It has a bushing pin 7 extending in the direction. The pen holders 3 to 5 and the knock shaft 2 are each held slidably in the axial direction by a common guide member 8 press-fitted into the outer cylinder l. As shown in FIG. 2, this guide member 8 consists of a disk-shaped piece 9 having a center hole 0, and a plurality of pieces ( It consists of guide pins 11 (the same number as the pen holders 3 to 5), and a semicircular guide groove 12 provided on the outer peripheral surface of the piece 9 and located at a mutually intermediate portion of the guide pins 11. 11 are each formed to have a semicircular cross section. The bushing pins 7 of the pen holders 3 to 5 are inserted into the guide grooves 12 of the guide member 8 so as to be slidable in the axial direction. Each pen holder 3 to 5 in that state
The rear end sides of pen shafts (core pipes) 13 to 15 for different writing types such as ballpoint pens and mechanical pencils are removably inserted and press-fitted into the holder. These pen shafts 13 to 15 each have a biasing force in the backward direction due to an elastic body such as a spring (not shown), and these biasing forces act on the pen holders 3 to 5, respectively. In addition, the mechanical pencils among the pen shafts 13 to 15 each include an elastic body (not shown) such as a reed chuck, a chuck tightening ring, and a spring that biases the reed chuck in the backward direction together with the lead pipe. A lead feeding mechanism is provided on the tip side for feeding out the pen tip or lead guide and the lead in a stepwise manner by a double knocking operation of the knock shaft 2, which will be described later. On the other hand, the center hole 10 of the guide member 8 has a slotted shaft 2.
The front end side is inserted so as to be slidable in the axial direction. The knock shaft 2 is inserted into the front end of the knock shaft 2 from the center hole 10.
A locking piece 16 is provided to prevent it from being pulled out in the backward direction. A select ring 17 is loosely fitted in the middle of the knock shaft 2, and the select ring 17 descends to an eccentric position under its own weight and removably selectively engages with the rear end of the push pin 7 of any of the pen holders 3 to 5. A pair of front and rear fixing rings 18 and 19 are provided coaxially to restrict movement of the ring 17 in the axial direction. Its front fixing ring 18 and the piece 9 of said guide member 8
An elastic body 20 made of a spring is interposed between the
The knock shaft 2 is always urged in the backward direction by the elastic body 20. The elastic body 20 in this case is stronger than the elastic body that biases the lead chuck of the mechanical pencil in the pen holders 3 to 5. Further, marks 21 to 23 (see FIG. 4) are provided on the surface of the outer cylinder 1 to indicate the type of each pen shaft 13 to 15. These marks 21 to 23 correspond to the pen shafts 13 to 15.
The corresponding pen holders 13 to 15 correspond to each of
is at a lower position in the outer cylinder 1 (a position where the select ring 17 falls under its own weight and engages with the rear end of the push pin 7 of the lower pen holders 3 to 5), remove the type of the lower pen shaft 13 to 15. It is displayed on the upper surface of the cylinder 1. That is, when one of the marks 21 to 23 is selected and placed on the upper side, the corresponding pen shaft 13 to 15 for writing is selected.
is located at the lower part of the outer cylinder 1, and its pen holders 3 to 5
The select ring 17 is located only at the rear end of the Bushbin 7.
is engaged due to the fall of its own weight and held in a knockable state,
In addition, the pen shafts 13 to 15 other than the lower ones are held in a retracted position (retracted position in the outer cylinder 1) from which they cannot be removed. Further, inside the rear side of the outer cylinder l, a trigger mechanism 25 for detachably locking the knock shaft 2 at the double knock position is provided.
is provided. This trigger mechanism 25 utilizes the clip 31 of the outer cylinder 1, and as shown in detail in FIG. An elastically deformable trigger plate 27 that bends in a substantially dogleg shape, a shaft insertion hole 28 formed upward from near the bent portion of the trigger plate 27, and a shaft insertion hole 28 formed at the upper end of the trigger plate 27 to accommodate the clip. It consists of a locking claw 29 for releasably locking the rear end side of 31. The trigger mechanism 25 has a press-fitting portion 26 that is press-fitted and fixed inside the rear side of the outer cylinder 1, and the trigger plate 2
The knock shaft 2 is inserted into the shaft insertion hole 28 of No. 7 so as to be slidable in the axial direction. This shaft insertion hole 28 may be provided with a small-diameter stopper engagement hole 28a as shown in FIGS. 3(a) and 3(b), or as shown in FIGS. 3(c) and 3(d). The upper side may have a larger diameter. On the other hand, the knock shaft 2 is provided with a stopper 30 made of a taber ring that passes through the shaft insertion hole 28 of the trigger plate 27 and is removably engaged with the front end of the trigger plate 27. The stopper 30 moves forward when the knock shaft 2 knocks and passes forward through the shaft insertion hole 28 while elastically deforming the trigger plate 27. After passing, the stopper 30 moves forward through the shaft insertion hole 28 due to the elastic restoring action of the trigger plate 27. It is adapted to be locked to the lower edge of the front end of 28. In this state, the stopper 30 moves the trigger plate 27 in the direction in which the lower edge of the front end of the shaft insertion hole 28 is separated from the knock shaft 2.
The lock is released by elastically deforming, and at this time,
The knock shaft 2 is moved backward by the elastic body 20 to insert the shaft 1J.
It passes through the TI hole 28 rearward. In this case, means for releasing the stopper 30 (operating means for elastically deforming the trigger plate 27)
is achieved by the clip 31. The clip 31 has a retaining leg piece 33 branched into two branches from the clip base 32 in a direction spaced apart from and parallel to the clip 31,
A fulcrum portion 34 in the shape of a spherical protrusion is integrally formed at the tip of the retaining leg piece 33. Further, a locking groove 35 for locking the locking claw 29 of the trigger play 1-27 is provided on the back side of the clip base 32. This clip 31 is configured such that the clip base 32 can be loosely inserted into the clip mounting hole 36 by storing the retaining leg piece 33 inside the outer cylinder 1 through a clip mounting hole 36 formed in the peripheral wall on the rear end side of the outer cylinder 1. It has a mounting structure in which the locking claw 29 of the trigger plate 27 is elastically pressed and locked in the locking groove 35 of the clip base 32. In this mounting structure for the lip 31, the clip mounting hole 36 is formed to have an appropriately longer axial length than the clip base 32. Therefore, the clip 31 is slidable in the axial direction within the clip attachment hole 36, and the clip base 32 is movable in the direction of protrusion and retraction from the clip attachment hole 36. In addition, 37 in FIG. 1 is an eraser storage part formed at the rear end of the knock shaft 2 and extends outward from the rear of the outer cylinder 1, and 38 is an eraser storage part into which the base end of the eraser storage part 37 is fitted and held. The eraser 39 is a knock cap that is removably fitted into the eraser storage portion 37 and also serves as an eraser cap. Next, the operation of the above embodiment will be explained. In FIGS. 1 and 9(A), the pen shafts 13 to 15 are in the retracted state, and in this state, the knock shaft 2 retreats due to the biasing force of the elastic body 20, and the stopper 30 is spaced apart behind the trigger plate 27. The lower edge of the shaft insertion hole 28 of the trigger plate 27 is in pressure contact with or close to the shaft 2 . Further, one mark 21 in FIG. 4 is located on the upper side, and the pen holder 3 corresponding to this mark 21 is located in the lower part of the outer cylinder 1. Therefore, the select I ring 17 is held at a position where it descends under its own weight and engages with the rear end of the bushing pin 7 of the lower pen holder 3. Here, the lower pen holder 3 is for mechanical pencil,
The operation will be explained assuming that the other upper pen holders 4 and 5 are for ballpoint pens. In the above retracted state, when the knock cap 39 is knocked as shown in FIG. 9(B), the knock shaft 2 moves forward against the elastic body 20, and together with the knock shaft 2, the select ring 1
7 moves forward, the lower pen holder 3 is pushed forward by the select ring 17, and only the mechanical pencil pen shaft 13 of that system is selectively drawn out from the tip of the outer cylinder 1. In this case, the stopper 30 that moves forward together with the knock shaft 2 is inserted into the shaft insertion hole 28 of the trigger plate 27.
passes forward, and when the knock is released after passing, the knock shaft 2
When the knock shaft 2 is moved slightly backward by the elastic body 2o, the stopper 3o engages with the lower edge of the shaft insertion hole 28 at the front end of the trigger plate 27, and the knock shaft 2 is held in the pen extended state in which the knock shaft 2 is locked at the pen extended position. Ru. In this pen-feeding state, when the knock cap 39 is slightly knocked, the stopper 3o is moved to the trigger plate 2.
When the knock shaft 2 repeats forward and backward movement of small strokes while the knock shaft 2 is at the front end of the pen shaft 7, the lead feeding mechanism at the tip of the mechanical pencil pen shaft 13 is actuated, and the lead is gradually drawn from the tip of the pen shaft 13. is brought out. Therefore, by repeating the weak knocking operation, the length of the lead of the mechanical pencil being drawn out is adjusted and a double knocking function is achieved. Next, from the pen extended state, the clip base 32 is moved in the direction of arrow P1 in FIG. 9(C) and in the direction of arrow P2 in FIG. 9(D).
direction, or when the tip of the clip 31 is pulled up in the direction of arrow P3 in FIG. . As a result, the lower edge of the shaft insertion hole 28 of the trigger plate 27 is aligned with the stopper 30.
When the stopper 3o comes off, the stopper 3o becomes able to pass through the shaft insertion hole 28 in the backward direction. Therefore, the knock shaft 2 is moved backward by the urging force of the elastic body 20, and the lower pen shaft 13 at the extended position is also moved backward by its own urging force and retracts into the outer cylinder 1. Thereafter, when the marks 22 and 23 in FIG.
The pen shafts 14 and 15 of the system can be operated in the same manner as in the above case. In addition, the design of the shaft insertion hole 28 of the trigger plate 27 in the above embodiment can be changed to various shapes.

【Effect of the invention】

As described above, in this invention, the knock shaft, which is biased in the backward direction, can be slid along the axial direction within the outer cylinder in which a plurality of pen shafts of different writing types are inserted so as to be slidable in the axial direction. A select ring is provided at the fixed position of the knock shaft to restrict its axial movement and to selectively engage the rear end of the lower pen shaft in the outer cylinder of each of the pen shafts by lowering its own weight. With the simple operation of just knocking the knock shaft, you can use the select ring to select only the lower pen shaft in the outer barrel of the plurality of pen shafts and draw it out. It does not require a dedicated pen ejecting mechanism for each pen shaft like the composite writing instruments of 2015, and it has various effects such as a reduction in the number of parts, a simpler configuration, lower costs, and improved operability. It will be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view of essential parts of a composite writing instrument according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a pen, pen holder, and guide member, FIG. 3(a) is a perspective view of a knock mechanism, figure(
b) to (d) are front views of the same, FIG. 4 is an external perspective view of the vicinity of the clip in the writing instrument, FIG. 5 is a sectional view taken along the line V-V in FIG. 1, and FIG. Figure 7 shows ■-■ of Figure 5.
Figure 8 is a cross-sectional view along the ■-■ line in Figure 5, Figure 9 is
A) to (E) are action explanatory diagrams. In the figure, 1 is an outer cylinder, 2 is a knock shaft, 13 to 15 are pen shafts, and 17 is a select ring. Figure 5 V // Figure 7 Figure 4 Figure 8 Figure 7? Figure 9 e/CD) ρyu

Claims (3)

[Claims] (1) a plurality of pen shafts housed at regular intervals around the axis in the outer cylinder, held so as to be able to independently slide in the axial direction, and each of which is biased in the backward direction; and the outer cylinder. A knock shaft is slidably inserted along the axial center of the interior and biased in the backward direction, and the knock shaft is loosely fitted in a fixed position to restrict axial movement and drop its own weight to an eccentric position. and a select ring that selectively engages with the rear end of the lower pen shaft in the outer cylinder of each of the pen shafts. (2) Each pen shaft is held slidably in the axial direction via its respective pen holder, into which the rear end side is removably inserted, and the select ring is lowered by its own weight to the rear end of each pen holder. The composite writing instrument according to claim 1, wherein the composite writing instrument is adapted to be selectively engaged with each other. (3) A patent characterized in that the surface of the outer barrel is marked with a mark corresponding to each pen shaft, which indicates the type of the pen shaft on the upper side when the corresponding pen shaft is in the lower order. A composite writing instrument according to claim 1.