JPH0615746Y2 - Compound writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a compound writing instrument in which a plurality of writing bodies are housed in a shaft and each tip writing part can be selectively retracted at the tip of the shaft.

(Prior Art) Conventionally, as this type of multiple writing instrument, a guide cylinder having a plurality of axial guide grooves is fixed to a front shaft, and a plurality of writing bodies each having a sliding piece attached to a rear end thereof are used as the guide cylinder. On the other hand, a cylindrical cam that is fitted so that its sliding piece moves back and forth along each guide groove and that has a circumferentially inclined cam slant surface that is displaced in the axial direction and is rotationally and integrally attached to the inner surface of the cap is used. The guide cylinder is assembled so that the cam slope and the sliding piece of each cursive body come into contact with each other, and the cap is rotated by sliding the sliding coma on the cam slope to move back and forth. There is known a rotary feeding type writing instrument in which the shaft is selectively retractable at the tip of the shaft.

(Problems to be solved by the invention) In the rotary feeding type compound writing instrument such as the above-mentioned conventional example, the tip writing portion is surely set because the position setting of the tip writing portion of each writing body is ambiguous in the shaft. There is a risk that the clothes may get soiled by being inserted into the pocket of the clothes without being immersed in the shaft, and the tip of each cursive body should be supported with one hand in order to appear and disappear at the tip of the shaft. In addition, since the cap is rotated with the other hand and both hands are required, it cannot be easily operated with one hand like a knock-out type writing instrument, which is disadvantageous in terms of operability compared to the knock type. , The knock type can be played by knocking when it is not handheld, but since it is a rotation feed type, it can not do such a thing and it is inferior in playability. Furthermore, the user's rotation limit is capped. Clear point However, there is a problem such as inconvenience that the cursive body cannot detect the relative position of the cursive body corresponding to the rotational position.

Therefore, an object of the present invention is to provide a multiple writing instrument that solves the above problems.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the compound writing instrument of the present invention has a guide cylinder having a plurality of axial guide grooves fixed to a tip shaft,
A cylindrical cam with a slanting surface attached to the guide tube so that the sliding pieces move back and forth along each guide groove, and has a cam slope that is displaced in the axial direction. Is attached to the inner surface of the cap rotatably and movably in the axial direction.The cylindrical cam is attached to the guide cylinder so that the inclined surface of the cam and the sliding piece of each cursive body contact and the cap is mounted on the guide cylinder. It is rotatably fitted to the cap, and each writing piece can be moved back and forth by sliding each sliding piece on the cam slope by rotating the cap, and a knock mechanism is provided at the rear end of the cap. The cylindrical cam can be moved back and forth in conjunction with the knock mechanism, and the tip writing portion of each cursive body can be retracted at the shaft tip opening by rotating the cap while the cylinder cam is advanced. And set the dimensions so that the cylindrical cam Dimension is set so that the tip writing part of the writing body can be retracted at the tip of the shaft by a knocking operation with the notch provided at the front end of the slant surface engaged with the sliding piece of the writing body. In addition, at the fitting portion of the cap and the guide tube, a rotary stopper piece is projected on the front edge of the cap, and the guide tube is abutted against the rotary stopper piece while rotating the cap by a required angle, and the cap is attached to the cap. It is characterized in that a brim for restricting rotation is provided.

(Operation) In the compound writing instrument of the present invention, the tip writing portion of each writing body can be selectively retracted at the shaft tip opening by rotating the cap while the cylindrical cam is advanced by the knock operation. When the notch provided on the front end of the cam slope of the cylindrical cam is engaged with the sliding piece of the cursive body by the rotating operation, and the knocking operation is performed, the tip of the cursive body is projected and retracted at the tip of the shaft. Therefore, even if the tip of the writing body is not completely inserted into the shaft by the rotating operation, the tip of the writing part is surely inserted into the shaft by the knocking operation. Also, when the cap is rotated by the required angle, the stopper piece provided on the cap collides with the brim provided on the guide tube, so that the user can detect the rotation limit point of the cap and oppose the rotation position. The relative position of cursive can be recognized.

(Example) An example will be described with reference to the drawings.

As shown in FIGS. 2 to 6, the guide tube (1) has a tube portion (2) in the front half portion, and a side surface portion is opened in the latter half portion to communicate with the front tube portion (2). With two guide grooves (3)
A flange (4) in the circumferential direction is projected at one location on the circumference of the outer surface of the rear end in (2), and small holes (5) in the axial direction are provided at three required locations on the rear end surface. ing. Three ballpoint pen type writing instruments (6) with different colors of ink each have a sliding piece (8) attached to the rear end via a receiving rod (7), and a guide tube
The rear end of the tubular portion (2) of (1) is inserted into each guide groove (3) so that the sliding piece is fitted back and forth along the guide groove (3). A return spring (9) is interposed between the front wall surface of the sliding piece (8) and the front end wall surface of the guide groove (3) so that each writing body (6) is biased rearward. The guide cylinder (1) is inserted and removed by inserting the front half of the cylinder (2) into the rear end inner hole of the front shaft (10) to prevent rotation in the circumferential direction and making it difficult to pull out in the axial direction. It is fixed freely. A cylindrical cam receiver (11) is attached to the rear end of the guide cylinder (1). The cylindrical cam receiver (11) has a guide rod (1
3) protruding and 3 mounting pins at the required positions on the front.
It has a structure in which (14) is projected, and the front of the disk (12) is a guide tube.
(1) The mounting pin (14) is inserted into the small hole (5) while being in contact with the rear end surface. As shown in FIGS. 7 to 10, the cap (15) is provided with a clip mount (16) on the outer surface of the rear end,
At the rear end of the inner surface, axial ribs (18) with cam slopes (17) on the front edge and grooves (19) are provided alternately in the circumferential direction. Axial anti-rotation rib (20) at one point
Further, a rotary stopper piece (21) is projected at one point on the circumference of the front edge. The cylindrical cam (22) is provided with a cam slant surface (23) that is displaced in the axial direction in a circumferential shape at the front end edge, an axial groove (24) at the outer surface portion, and a small diameter tubular portion (25) at the rear end. It is provided. A notch (26) is provided at the frontmost position of the cam slope (23). The cylindrical cam (22) is inserted inside the cap (15), and the anti-rotation rib (20) is fitted in the groove (24) of the cap (15) so that it can move axially with respect to the cap (15). Is non-rotatably assembled. The cap (15) and the cylindrical cam (22) are fitted onto the outer periphery of the latter half of the guide cylinder (1), and the cylindrical cam (22) is attached to each cursive body (23) on the cam slope (23) with respect to the guide cylinder (1). The slide piece (8) of (6) is assembled with the return spring (9) in contact with it, and the cap (15) has its front end portion after the tube portion (2) of the guide tube (1). It is fitted in the end portion in a state where it is freely rotatable in the circumferential direction and is prevented from coming off in the axial direction. The rotary stopper piece (21) protruding from the front end edge of the cap (15) is positioned so as to be arranged on the same circumference as the collar (4) of the guide tube (1). The cylindrical cam receiver (11) attached to the rear end of the guide cylinder (1) is of course housed inside the cylindrical cam (22), and the guide rod (13) of the cylindrical cam receiver (11) is located at the rear end of the cylindrical cam.
Inserted in (25). In addition, the cylindrical cam receiver (11) and the cylindrical cam
A contact spring (27) is interposed between the (22). Inside the rear end of the cap (15), a knock rod (28) is arranged movably in the axial direction with the rear end of the cap protruding rearward. As shown in FIG. 11, the knock rod (28) has an inner hole (29) opening at the front end and a concavo-convex tooth portion (31) having a cam slope (30) at the circumferential portion of the front end surface. There is. The rotor (32) that abuts the rear end of the cylindrical cam (22) at the front position of the knock rod (28).
Are arranged. As shown in FIGS. 12 to 14, the rotor (32) is provided with engaging ribs (3) at required positions on the circumference of the outer surface of the front end.
3) is projected and a cam slope (34) is provided at the rear edge of it.
Insert the rear end tube portion (35) into the inner hole (29) of the knock rod (28) and engage the engaging rib (33) with the tooth portion (31) of the knock rod (28) so that the mutual cam slopes (30 ) (34) is in contact. Therefore, when the knock rod (28) is pushed forward, the rotor (32) rotates by a required angle due to the sliding of the cam slopes (30) and (34). In addition, knock stick (28)
The projection (36) provided on the outer surface of the front end is fitted in the groove (19) provided on the inner surface of the rear end of the cap (15) so that the projection (36) cannot rotate.
The rotor (32) rotates for each knocking operation by the knock rod (28) and alternately inserts the engaging ribs (33) into the grooves (19) of the cap (15) to retract or the engaging ribs. Cap (15)
The front end edge of the rib (18) is engaged to maintain the advanced state. The cylindrical cam (22) and the contact spring (2
Since it is always in the contact state by 7), it moves forward or backward in conjunction with the rotor (32). With the rotor (32) and the cylindrical cam (22) in the forward state, the cap (15) is rotated with respect to the front shaft (10) to cut out the notch (26) at the frontmost position of the cam slope (23) of the cylindrical cam. Is dimensioned so that the tip writing portion (37) of the writing body (6) protrudes from the shaft tip opening (38) when the sliding writing piece (8) of any writing body (6) is engaged. (See Figure 1). Accordingly, the tip writing portion (37) of each cursive body (6) is rotated by a rotating operation so that the shaft tip end
In (38), it can appear and disappear selectively. In the retracted state of the rotor (32) and the cylindrical cam (22), the cylindrical cam (2
Even when the sliding piece (8) of any cursive body (6) is engaged with the notch (26) at the foremost position of the cam slope (23) of (2), the cursive body is
The tip writing portion (37) of (6) is dimensioned so as not to project from the shaft tip opening (38). Therefore, while the sliding piece (8) of the cursive body (6) is engaged with the notch (26) of the cam slope (23) of the cylindrical cam (22), the knock operation is performed on the knock rod (28). In addition, by moving the rotor (32) and the cylindrical cam (22) back and forth, the tip writing portion (37) of the writing body (6) can be projected and retracted at the shaft tip opening (38). The brim (4) provided on the guide tube (1)
And a rotating stopper piece (2) with a cap (15) on the front edge.
In 1), the rotation of the cap (15) is restricted so that the user can clearly detect the position of the cylindrical cam (22) in the rotational direction.One end of the rotary stopper piece (21) is attached to one end of the brim (4). The front end cutout (26) of the cam slope (23) is one cursive body in the state of abutting against the
While engaging the sliding piece (8) of (6), the cap (15) is rotated in the reverse direction, and the other end of the rotating stopper piece (21) is abutted against the other end of the collar (4). The position of the frontmost notch (26) of 23) is adjusted so as to engage with the sliding piece (8) of the other writing body (6). The position is set so that the sliding piece (8) of the remaining one cursive body (6) and the notch (26) of the cam slope (23) engage in the middle of the rotation range of the cap (15). Has been done. Tip axis (1
(0) The rear end edge and the front edge of the cap (15) are narrowed between the guide tube (1) and the tube part (2). Is affixed with a color sticker (40) showing the ink color of each cursive body (6) at the required position, and a window-opening ring (41) on the outer periphery of the front end of the middle ring (39) and cap (15). ) Is fitted, and the color of the ink of the writing body (6) with the tip writing portion (37) protruding by the rotation operation of the cap (15) appears in the window of the window opening ring (41). ing.

(Effects of the Invention) Since the present invention is configured as described above, it is extremely easy to operate by making the tip writing part of the cursive body appear and disappear at the shaft tip opening not only by rotating operation but also by knocking operation. It will be convenient. Next, even if the tip writing part of the cursive body is not completely immersed by rotating, if the cylindrical cam is retracted by the knocking operation, the tip writing part of the cursive body will surely retract into the shaft. It also eliminates the possibility of contamination. In addition, the user can play knocking when he / she has time. In addition to the advantage that the user can detect the relative position of the cursive body corresponding to the rotational position by sensing the limit point of the rotary operation, the user can recognize the relative position on the outer circumference of the guide cylinder as in the conventional case. It is extremely manufactured and assembled as compared with a method in which rotation is restricted by providing a circumferential groove and projecting a brim that fits into the circumferential groove on the inner surface of the cylindrical cam and abutting the brim on both side walls of the circumferential groove. There are effects such as easy attachment.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of the whole, FIG. 2 is a plan view of a guide tube,
3 is a longitudinal sectional view of the guide cylinder, FIG. 4 is a lateral sectional view taken along the line AA of FIG. 2, FIG. 5 is a lateral sectional view taken along the line BB of FIG. 2, and FIG. C line cross-sectional view, FIG. 7 is a plan view of the cap,
8 is a longitudinal sectional view of the cap, FIG. 9 is a lateral sectional view of FIG. 8 taken along line DD, FIG. 10 is a lateral sectional view of FIG. 8 taken along line EE, and FIG.
FIG. 12 is a partially cut side view of the knock rod, FIG. 12 is a side view of the rotor, FIG. 13 is a longitudinal sectional view of the rotor, and FIG. 14 is a front end view of the rotor. (1) …… Guide tube, (2) …… Cylinder part, (3) …… Guide groove, (4)…
… Collar, (6) …… cursive body, (8) …… sliding piece, (9) …… return spring, (10)… lead shaft, (11) …… cylindrical cam receiver, (15) …… Cap, (18) …… rib, (19) …… groove, (2
(0) …… Rotation stop rib, (21) …… Rotary stopper piece, (22)…
… Cylindrical cam, (23) …… Cam slope, (24) …… Groove, (26) ……
Notch, (27) …… Abutment spring, (28) …… Knock bar,
(32) …… Rotor, (37) …… Tip writing part, (38) …… Shaft tip opening.

Claims (1)

[Scope of utility model registration request] A guide cylinder having a plurality of guide grooves in the axial direction is fixed to a front shaft, and a plurality of writing bodies each having a sliding piece attached to its rear end are provided on the guide cylinder. A cylindrical cam having a cam slant surface that is displaced in the axial direction is attached to the inner surface of the cap rotatably and movably in the axial direction. Assemble the cam slope and the sliding piece of each cursive body in contact with each other, and rotatably fit the cap to the guide tube, and slide the sliding piece on the cam slope by rotating the cap. The cursive body can be moved back and forth, and a knock mechanism is provided at the rear end of the cap to allow the cylindrical cam to move back and forth in conjunction with the knock mechanism. The tip writing part of each cursive body is rotated by rotating the cap. The dimensions are set so that the shaft tip port can be retracted and retracted, and the notch portion provided at the front end of the cam slope of the cylindrical cam is engaged by a knocking operation with the sliding piece of an arbitrary writing body engaged. Set the size so that the tip writing part of the cursive body can be retracted and retracted at the tip of the shaft. A double-sided writing instrument characterized in that a brim is provided to restrict the rotation of the cap by colliding with the above-mentioned rotation stopper piece in a state of being rotated by a required angle.