JPH0617591Y2 - 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 a multiple writing instrument that combines a writing pencil type writing instrument (hereinafter referred to as a sharp writing instrument) and a ballpoint pen writing instrument (hereinafter referred to as a ballpoint writing instrument), it has a plurality of axial guide grooves. Then, a guide cylinder having a structure in which a circumferential circumferential groove is provided on the side surface portion of the rear end and an axial vertical groove communicating with one end thereof is fixed to the leading shaft, and sliding pieces are attached to the respective rear ends. A sharp writing body and a ballpoint pen writing body are fitted in a guide cylinder so that the sliding pieces of the writing body move back and forth along each guide groove, and a cam slope that is displaced in the axial direction is provided and a brim is provided on the inner surface. A cylindrical cam having an eraser fitting portion and a sleeve fitting portion at the rear end is attached to the inner surface of the cap so that the rotation is integral and movable in the axial direction. The sliding piece between the slope and each cursive Assemble so that the brim provided on the inner surface part fits into the circumferential groove of the guide tube, and slide the sliding piece that comes into contact with the cam slope by rotating the cap with respect to the tip shaft to move back and forth. 2. Description of the Related Art A double-sided writing instrument is known in which the tip writing portion of the body is selectively retractable at the tip of the shaft.

(Problems to be solved by the invention) By the way, in the multiple writing instrument, various writing instruments can be combined. For example, in addition to the combination of the sharp writing body and the ballpoint pen writing body as in the above-mentioned conventional example, a combination of ballpoint pen writing bodies having different ink colors is also possible. However, when changing the combination of cursive bodies, it is necessary to change not only the structure of the cylindrical cam and the parts to be assembled thereto, but also the structure of the rear end portion of the guide cylinder. For example, in the case of changing the combination of the sharp writing body and the ballpoint pen writing body of the above-mentioned conventional writing instrument to a combination of the ballpoint pen writing bodies, the cylindrical cam by the knocking operation necessary for feeding out the core of the sharp writing system Since it is not necessary to move forward, it is not necessary to provide a vertical groove in communication with one end of the circumferential groove of the guide cylinder into which the flange of the cylindrical cam is fitted. Therefore,
The present invention does not require a new design of the guide cylinder when changing the combination of cursive materials, and it suffices to replace only the cylindrical cam and the parts to be assembled with it when changing the cursive combination. Compound writing instrument, that is,
An object of the present invention is to provide a double-sided writing instrument in which the guide tube has compatibility and is extremely advantageous in production.

(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 plurality of writing bodies, each with a sliding piece attached to the rear end, are fitted to the guide tube so that the sliding piece moves back and forth along each guide groove, and a receiving part of the required shape is provided on the guide tube. A removable cylindrical cam receiver is installed at the rear end of the guide cylinder.
A cylindrical cam of a required shape having a cam slope that is displaced in the axial direction is attached to the cap while the inner surface of the cam is rotationally and integrally attached, and the cylindrical cam is attached to the receiving portion of the cylindrical cam receiver, and at the outer peripheral portion of the guide tube. A cam slope is arranged to bring the cam slope and the sliding piece of each cursive body into contact with each other, and by sliding the sliding pieces along the cam slope of the cylindrical cam by rotating the cap with respect to the leading shaft, It is characterized in that the tip writing portion of each writing body can be selectively moved into and out of the shaft tip opening by moving.

The structure of the receiving portion of the cylindrical cam receiver with respect to the cylindrical cam is appropriately designed corresponding to the structure of the cylindrical cam, and the structure of the cylindrical cam is appropriately designed depending on the combination of the cursives to be equipped.
The cylindrical cam receiver has a common fitting structure with respect to the guide cylinder regardless of the structure.

(Operation) In the multiple writing instrument of the present invention, a detachable cylindrical cam receiver is arranged at the rear end of the guide cylinder, and a receiving portion corresponding to the shape of the cylindrical cam is provided on this cylindrical cam receiver to be assembled with the cylindrical cam. So
The guide cylinder is not directly assembled with the cylindrical cam, in other words, it is not necessary to provide the guide cylinder with an assembly structure for the cylindrical cam, and the structure of the guide cylinder does not change regardless of the change of the structure of the cylindrical cam. Therefore, the guide tube becomes compatible.

(Embodiment) First, a first embodiment will be described with reference to FIGS. 1 to 6. As shown in FIGS. 2 to 6, the guide tube (1) has a tube portion (2) in the front half portion and has a side surface opening in the rear half portion so as to communicate with the front tube portion (2). It has two guide grooves (3) and axial mounting holes (4) at the three required positions on the rear end face.
Is provided. One sharp cursive body (5) and two ballpoint pen cursive bodies (6) with different colors of ink each have a sliding piece (9) at the rear end via a core pipe (7) and a receiving rod (8). Attach the guide tube (1) from the tube (2) to the rear end of each guide groove.
Inserted in (3), the sliding piece (9) is fitted so as to move back and forth along the guide groove (3). In addition, a return spring is placed between the front wall surface of the sliding piece (9) and the front end wall surface of the guide groove (3).
The sharp cursive body (5) and the two ball-point pen cursive bodies (6) are respectively biased rearward with the (10) interposed.
The guide tube (1) is inserted and removed by inserting the front half of the tube (2) into the rear end inner hole of the front shaft (11) 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 (12) is removably arranged at the rear end of the guide cylinder (1). The cylindrical cam receiver (12) has three mounting pins (13) projecting at required positions on the front surface and a receiving portion (14) on the rear end side, and the receiving portion (14) has a circular shape on its side surface. Circumferential groove (1
5) and a vertical bar (16) that communicates with one end of it and extends axially forward
Is provided. The front of the cylindrical cam receiver (12) is a guide tube.
(1) Abut the rear end face and attach the mounting pin (13) to the mounting hole (4).
It is installed by inserting into. The cap (17) is provided with a clip mount (18) at the rear end of the outer surface, and a retaining step (19) near the rear end on the inner surface of the cap (17). A rotation stop rib (20) is provided. Cylindrical cam
(21) is provided with a cam slope (22) which is displaced in the axial direction at the front edge in a circular shape, an axial groove (23) is provided on the outer surface, and a collar (24) is provided on the inner surface, and the rear end is provided. An eraser fitting tubular portion (25) is provided in the portion. A notch (26) is provided at the foremost position of the cam slope (22). The cylindrical cam (21) is inserted into the cap (17) from its front side, and the rotation stop rib (20) is fitted in the groove (23) of the cap (17) so as to be movable in the axial direction with respect to the cap (17). It is fixed so that it cannot rotate. The cap (17) and the cylindrical cam (21) are the latter half of the guide cylinder (1) and the cylindrical cam receiver (1).
The cylindrical cam (21) is fitted on the outer peripheral part of (2), and the cylindrical cam (21)
, The receiving part (14) is fitted with the collar (24) in the circumferential groove (15), and the cam slope (22) of the cylindrical cam (21) is the outer peripheral part of the latter half of the guide cylinder (1). Sliding pieces of each cursive arranged in (9)
Are in contact with. Eraser fitting on the rear end of the cylindrical cam (21) The rear end of the cylinder part (25) slightly protrudes to the rear of the cap (17), and the holder (28) of the eraser (27) is fitted into its inner hole. A knock cylinder (30) with a crown (29) is fitted on the outer peripheral portion of the wearer to cover the eraser (27). Figure 1 shows a cylindrical cam
The notch (26) at the frontmost position of the cam slope (22) of (21) engages with the sliding piece (9) of the sharp cursive body (5) to form the sharp cursive body.
The tip writing portion (31) of (5) is shown protruding from the shaft tip opening (32), and the collar (24) on the inner surface of the cylindrical cam (21) is provided with the peripheral groove (12) of the cylindrical cam receiver (12). It is located at the location of communication with the vertical groove (16) at one end of 15). Therefore, when the crown (29) is knocked in this state, the brim (24) can advance in the vertical groove (16), so that the cylindrical cam (21)
Will move forward and the lead can be fed out.

Next, a second embodiment will be described with reference to FIGS. 7 to 9. This writing instrument is not equipped with Sharp writing system (5),
All of them were ballpoint writing materials (6) with different ink colors, and the guide cylinder (1) was the same as that of the first embodiment. That is, the second embodiment is constructed by replacing parts such as the cylindrical cam receiver (12), the cylindrical cam (21) and the cap (17) in the first embodiment. As shown in FIGS. 8 and 9, the cylindrical cam receiver (12) is provided with a guide rod (34) of a required length projecting from the center of the rear end of the disc (33). The rear side is used as the receiving part (14) and three mounting pins are provided at the required positions on the front side.
It has a structure in which (13) is protruded, and the front surface of the disc (33) is in contact with the rear end surface of the guide tube (1) and the mounting pin (13) is inserted into the mounting hole (4). That is, the position and length of the mounting pin (13) are designed to be the same as the structure of the cylindrical cam receiver of the first embodiment. The cylindrical cam (21) is provided with a small-diameter cylinder portion (35) at the rear end instead of the flange (24) provided on the inner surface as in the first embodiment. Tube part (35)
The guide rod (34) is inserted into the disc and the contact spring (36) is mounted between the disc and the rear surface of the disc (33). A knock mechanism for moving the cylindrical cam (21) back and forth is arranged at the rear end of the cap (17). That is, the front end surface of the knurled rod (3
8) is movable back and forth and is non-rotatably arranged.In front of it, there is an engaging rib (39) at a required position on the circumference of the outer surface, and a rotor (40) whose rear end has a cam slope is arranged. The rotor (40) has its engaging rib (39) engaged with the tooth portion (37) of the knock rod (38), and its front end is in contact with the rear end of the cylindrical cam (21). When the knock rod (38) is pushed forward, the rotor (40) rotates by a required angle due to the sliding of the cam slopes of the teeth (37) and the engaging ribs (39) that are in contact with each other. The child (40) alternately engages the engaging rib (39) with the front end edge of the rib (41) provided at a required position on the inner circumferential surface of the cap (17) by the rotation of each knocking operation. To maintain the forward movement state, or it is fitted into a groove provided between the ribs (41) and retracted. As the cylindrical cam (21) advances in conjunction with the advance of the rotor (40), the sliding piece (9) engages with the notch (26) at the front end of the cam slope (22) of the cylindrical cam (21). The tip writing part (31) of the ball-point pen cursive body (6) is protruding from the shaft tip opening (32), and the shaft tip opening (32) is caused by the retraction of the cylindrical cam (21) that is interlocked with the retreat of the rotor. The tip writing portion (31) of the ball-point pen writing body (6) protruding from is dimensioned so as to be immersed in the shaft. That is, the second embodiment is configured such that the tip writing portion of the writing body can be projected and retracted at the shaft tip opening not only by rotating operation but also by knocking operation.

(Advantages of the Invention) Since the present invention is configured as described above, when changing the combination of the types of cursives to be installed in the shaft, for example, change from the first embodiment to the second embodiment. In this case, the guide cylinder can be used as it is without any new design (the tip shaft for fixing the guide cylinder can also be used as it is). In other words, the guide cylinder has compatibility, so that it can be used in production. It will be extremely advantageous. Further, since the conventional guide tube has a structure in which the guide tube of the present invention and the cylindrical cam receiver are integrated, the structure of the guide tube of the present invention is simpler than that of the conventional guide tube, and the mold forming is easy. This is also advantageous in terms of manufacturing the guide cylinder.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view of the first embodiment, FIG. 2 is a plan view of a guide tube, FIG. 3 is a vertical sectional view of a guide tube, and FIG. 4 is a horizontal sectional view taken along line AA of FIG. 5, FIG. 5 is a transverse sectional view taken along the line BB of FIG. 2, FIG. 6 is a transverse sectional view taken along the line CC of FIG. 2, FIG. 7 is a longitudinal sectional view of the entire second embodiment, and FIG. FIG. 9 is a partially cut side view of the cylindrical cam receiver of the second embodiment, and FIG. 9 is a front end view of the cylindrical cam receiver. (1) …… Guide tube, (2) …… Cylinder part, (3) …… Guide groove, (4)…
… Mounting hole, (5) …… Sharp cursive, (6) …… Ball pen cursive, (9) …… Sliding piece, (10) …… Return spring, (11) …… Spindle, (12) …… Cylindrical cam receiver, (13) …… Mounting pin, (14) …… Receiving part, (15) …… Surround groove, (16) …… Vertical groove,
(17) …… Cap, (20) …… Rotation stop rib, (21) …… Cylinder cam, (22) …… Cam slope, (23) …… Groove, (24) …… Hem,
(25) …… Eraser fitting cylinder part, (26) …… Notch part, (27) …… Eraser, (29) …… Crown, (30) …… Knot cylinder, (31) …… Tip writing part , (30) …… Shaft tip port, (33) …… Disc, (34) …… Guide rod, (35) …… Small diameter tube, (36) …… Abutment spring,
(38) …… notch rod, (40) …… rotor, (41) …… rib.

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. It is fitted so as to move back and forth along with, and a cylindrical cam receiver that is attachable to and detachable from the guide cylinder is provided at the rear end of the guide cylinder by providing a receiving part of the required shape, and the cam slope that is displaced in the axial direction is A cylindrical cam having a required shape is attached to the cap so as to rotate integrally with the inner surface of the cap, the cylindrical cam is attached to the receiving portion of the cylindrical cam receiver, and the cam slope is arranged on the outer peripheral portion of the guide cylinder. The slope and the sliding piece of each cursive body are in contact with each other,
By rotating the slide shaft along the cam slope of the cylindrical cam by rotating the cap with respect to the tip shaft, the tip writing part of each writing body can be selectively retracted at the tip end of the shaft. Writing instrument characterized by that.