JP3333034B2 - Writing implement with seal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a so-called writing implement with a seal, in which the tips of a plurality of writing bodies can be alternately protruded and retracted at a front end of a front shaft and a seal is attached to the rear end of a rear shaft.

[0002]

2. Description of the Related Art Conventionally, as an example of a double-type writing instrument, as shown in Japanese Utility Model Application Laid-Open No. 64-3491 by the same applicant, a sliding groove for guiding two writing objects is provided on a front shaft. On the front end, a guide cylinder to be fixed and a cam slope contacting a sliding piece attached to two writing bodies fitted to the guide cylinder are provided at the front end, and the rear end is formed as a knock portion on the rear shaft. On the other hand, it has a cylindrical cam mounted so that it can move freely in the axial direction and rotates in the circumferential direction as one unit, and two cursive objects can be selected at the front end of the front shaft by rotating the rear shaft with respect to the front shaft. There are multiple writing instruments that can appear and disappear. It is well known that a seal is attached to the rear end of a rear shaft, and a knock cover is attached to the periphery of the seal by covering the seal surface. In addition, this type of conventional writing implement with a seal has a large diameter in which the diameter of the seal mounting portion of the rear shaft is extremely bulged with respect to the diameter of the front shaft, and thus the appearance is poor.

[0003]

The conventional writing implement with a seal is poor in appearance, and if the cap and the outer periphery of the seal are too strong, the seal may be detached by attaching or detaching the cap. or,
Since the cap is small, there is a problem that the finger is easily stained or lost when the cap is attached or detached. An object of the present invention is to solve the above problems.

[0004]

In order to solve the above-mentioned problems, a writing instrument with a seal according to the present invention is provided with an engaging portion for fitting the leading end of the front shaft and the center shaft in a non-rotatable and retaining state. Fix both, and in the multiple guide grooves of the guide cylinder integrated with the central shaft, at least one as a pencil pencil writing body, and urge the return spring between the guide cylinder and the sliding piece respectively with the writing body A cylindrical cam, which is fitted to be able to move back and forth and has a cam inclined surface that is displaced in the axial direction at the front end portion, is prevented from coming off so that it can rotate and shift with respect to the guide cylinder or the center shaft. In a double writing implement, the tip of each writing body can be selectively made to protrude and retract from the tip end of the front shaft by alternately moving back and forth by rotating the cylindrical cam with respect to the front shaft or center shaft by contacting the slope. A rear shaft is integrally provided on the rear outer periphery of the cam. Is, seal the rear end of the rear axle is fastened, the rear axle long cap of the rear end closed form the fountain pen-shaped on the outer peripheral portion of which is detachably fixed in a non-contact state on the outer periphery of the seal,
In a state where the tip portion of the mechanical pencil is protruded from the tip end of the front shaft, the sharp lead is drawn out with the transition of the axis of the cap with respect to the front shaft and the center shaft.

[0005]

1 and 4 show an embodiment of the present invention. The writing implement with a seal of the present invention includes a center shaft 1 integrally provided with a guide cylinder 2, a front shaft 3, a rear shaft 4 integrally provided with a cylindrical cam 5, a pair of sliding pieces 6, 6 ｀, a pencil pencil writing body 7, The main components are the writing body 8 such as a ballpoint pen, the seal 37, and the cap 45.

First, the center shaft 1 is made of resin, and as shown in FIG. 1, an axially long guide groove 9 opened on the side surface from a substantially central portion to a rear end, and a similar guide groove 9 on the opposite side surface. Is provided. The front half of the guide tube 2 is provided with a cylindrical portion 10 having a partition portion 16 having holes 32, 32 ° communicating with the respective guide grooves 9, 9 ° and having an open front end. A bulging engagement portion 13 is formed on the outer peripheral portion of the cylindrical portion 10.

On the rear side surface of the center shaft 1, as shown in FIG. 2, a vertical groove 18 is connected to a peripheral groove 19 via a sloped surface 53, so that a substantially L-shaped window is formed. Are drilled. As will be described later, the protrusion 17 of the cylindrical cam 5 is inserted from the vertical groove 18, and the protrusion 17 elastically expands the inclined surface 53, passes through the narrow portion 54, and enters the circumferential groove 19. The cylindrical cam 5 rotates while the projection 17 abuts on the rear wall of the circumferential groove 19 in the circumferential direction, so that the writing part of the writing body 8 such as the mechanical pencil 7 or the ballpoint pen alternately protrudes and retracts from the front end of the front shaft. Become.

[0008] The circumferential groove 19 is made of the mechanical pencil 7
A wide groove 55 is provided so that the cylindrical cam 5 can be axially shifted at the position of the projection 17 when the writing member projects. When the writing object is stored or when the writing object 8 such as a ballpoint pen projects, the cylindrical groove is formed. An inclined surface 57b is connected between a rear wall 57a and a rear wall 57c of the circumferential groove 19 so that the cam 5 cannot move substantially in the axial direction, and a narrow groove 56 is provided. Further, as will be described later, it is set so that the wall 20 of the rear shaft 4 contacts the rear end of the center shaft 1 at the front end of the shaft transition, and the front end of the projection 17 does not contact the front wall 58 of the circumferential groove 19.

The front end of the tip shaft 3 is tapered, and the tip end of the inner hole is provided with a tip end port through which a writing tip end appears. or,
The rear end hole is provided with an engagement groove 12 which engages with an engagement portion 13 provided on an outer peripheral portion of the cylindrical portion 10 in front of the guide cylinder and prevents the cylindrical portion 10 from coming off and from rotating. The cylindrical portion 10 and the front shaft 3 are detachably fixed by an appropriate force. (Same as the configuration of the front shaft in Japanese Utility Model Application Laid-Open No. 64-3491) When refilling the pencil in the mechanical pencil 7 or exchanging the pencil 8 such as a ballpoint pen, the front shaft 3 is attached to the central shaft 1. In order to simplify the operation from the relationship between the rear shaft 4 and the attachment / detachment of the cap 45, which will be described later, it can be said that it is desirable that the joint between the cylindrical portion 10 and the rear end hole of the front shaft 3 be a screw.

The rear shaft 4 is made of resin and has a cylindrical cam 5 at its tip. The cylindrical cam 5 has a cylindrical shape, and has a cam slope 14 that is circumferentially displaced back and forth at the front end edge.
A cutout 15 is formed at the foremost end of the fourth member 4. Further, the tip of the mechanical pencil is protruded from the side surface of the cylindrical cam 5 by being inserted into the longitudinal groove 18 of the center shaft 1 and elastically fitted into the circumferential groove 19 to rotate within a predetermined range (approximately 180 degrees). A projection 17 is formed to keep the shaft from shifting in this state.

The rear shaft 4 has a wall 2 behind the cylindrical cam 5.
A front outer cylinder portion 34 and a rear outer cylinder portion 34 # which are connected and integrated with each other at 0 are provided. Is provided with an inner cylindrical portion 33 having a slot 33. The front end of the outer cylindrical portion 34 is provided with a flange 3 that abuts a front end of a cap 45 described later.
5 is formed, and an engaging portion 36 that engages with the inner peripheral portion of the cap 45 is formed on the outer peripheral portion.

If the cap 45 is made of a resin, the engaging portion 36 can be selected from an uneven engaging portion, a frictional engagement with a rib or the like, a screw, and the like. If the cap 45 is made of metal, a metal cylinder is fixed to the outer periphery of the outer cylinder portion 34 and a rib-shaped engaging portion is provided on the peripheral surface of the cylinder, or the cap 45 is engaged with the inner peripheral portion of the cap 45. Various means are selected, such as installing a wig having a joint.

A mounting base 40 for a seal 37 is detachably fitted to the inner cylinder 33. Further, a cap 45 having a rear end closed shape is fitted around the outer periphery of the outer cylindrical portion 34 in a non-contact state with the outer periphery of the seal 37, and the front end of the cap 45 is
, And the cap 45 is detachably fixed by the engaging portion 36. The printing body 38 constituting the seal 37 is made of a printing material such as a continuous porous rubber capable of absorbing ink, and has a printing surface 39 on which printing is possible.

The sliding piece 6 has a projection 22 on the outer surface, a central portion protruding from the rear end face of the projection 22, and both sides thereof have a cam having substantially the same gradient as the cam slope 14 of the cylindrical cam 5 described above. It has a slope. Further, a hole is provided which abuts against the flange portion 24 of the core pipe 23 to protrude and fit the rear of the core pipe 23 long. The sliding piece 6 # has a projection 22 # and a cam slope like the sliding piece 6, and a locking portion 26 for fixing the rear end of the writing body 8 such as a ball-point pen is provided at the tip. Incidentally, the locking portion may be formed in a pipe shape and the rear end of the writing body may be fitted.

The mechanical pencil 7 has a built-in general chuck mechanism, is joined to the core pipe 23 via a joint 29 connected to the chuck mechanism at the rear end, and has a flange portion 24 provided behind the core pipe 23. The sliding piece 6 is fitted in contact with the sliding piece 6, and the rear end hole of the core pipe 23 protruding from the rear end of the sliding piece 6 is closed by a tail plug 25 or the like. The leading of the lead is performed by moving the chuck by the axial movement of the sliding piece 6 in a state where the step 28 at the tip end of the mechanical pencil 7 is in contact with the inner step 27 of the front shaft 3.

Next, a description will be given in assembling order. In the drawing body 8 such as a mechanical pencil 7 and a ballpoint pen, each sliding piece 6, 6 # is connected to the rear end, and each of the guide shafts 2 of the center shaft described above is connected. It is movably fitted in the guide grooves 9, 9 ｀, and the front end face of each sliding piece 6, 6 ｀ and the partition 1 on the front of the guide grooves 9, 9 ｀.
6 is urged rearward by return springs 30 and 30 # interposed between the springs.

The rear shaft 4 has a cylindrical cam 5 inserted into the rear end hole of the central shaft 1 and the projection 17 is elastically fitted into the circumferential groove 19, and is rotatable at substantially 180 degrees in the circumferential direction with respect to the central shaft 1. And it is stopped by stopping. Also, in a state where the mechanical pencil 7 is protruded, the rear shaft 4 can be shifted by the stroke necessary for centering the center shaft 1 with respect to the center shaft 1, and when the cursive body is stored or the writing body 8 such as a ballpoint pen projects. Axis transition is not allowed in the state. Since the sliding pieces 6, 6 # are constantly urged rearward by the return springs 30, 30 #, the cam slopes of the projections 22, 22 # are always fixed to the cylindrical cam 5 *.
In contact with the cam slope 14.

In addition, separately from the embodiment, a flange-shaped protrusion is provided in the inner hole of the cylindrical cam, and a circumferential groove is provided in the outer periphery of the rear end of the guide cylinder.
It is also possible to adopt a configuration in which the projection is elastically fitted into the circumferential groove so that the cylindrical cam is rotatable with respect to the guide cylinder and does not come off.

The engaging portion 13 of the cylindrical portion 10 is elastically fitted into the engaging groove 12 of the front shaft 3 with the rear end surface of the front shaft 3 in contact with the front surface of the step portion 31 of the center shaft 1. Thus, the front shaft 3 and the center shaft 1 are fixed in a state where rotation is prevented and the shaft is prevented from coming off. The tip shaft 3 is detachable with an appropriate force. In this state, when the rear shaft 4 is rotated in one direction with respect to the front shaft 3 or the center shaft 1, the sliding piece 6 moves forward and the notch 15 at the front end of the cam slope 14 of the cylindrical cam 5 is formed.
Locks on the projection 22 of the sliding piece 6 of the mechanical pencil writing body 7 so that the writing tip projects from the tip end of the front shaft. When the rear shaft 4 is rotated with respect to the front shaft 3 or the center shaft 1 in the other direction, the sliding piece 6 is retracted so that the writing tip of the pencil pencil writing body 7 is immersed from the tip of the front shaft and the sliding piece is moved. 6 ° advances, and the writing tip of the writing body 8 such as a ballpoint pen projects from the tip end of the front shaft.

The seal 37 is provided on the inner cylindrical portion 33 of the rear shaft 4 with a stamp surface 39.
Is fixed rearward, and the cap 45 is fixed to the outer tubular portion 34. When the cap 45 is rotated in one direction with respect to the front shaft 3 or the center shaft 1 in this state, the sliding piece 6 moves forward and the notch 15 at the forefront end of the cam slope 14 of the cylindrical cam 5 is turned into one of the mechanical pencils 7. The writing tip is locked to the projection 22 of the sliding piece 6 so that the writing tip projects from the tip end of the front shaft. When the rear end of the cap 45 is knocked with respect to the front shaft 3 and the center shaft 1, the chuck mechanism operates and the step mechanism 28 of the mechanical pencil 7 comes into contact with the inner step 27 of the front shaft 3 so that the core is moved. Is delivered.

The cap 4 is attached to the front shaft 3 or the center shaft 1.
When the rotating member 5 is rotated to the other side, the sliding piece 6 is retracted, and the writing tip of the mechanical pencil writing body 7 is immersed from the tip end of the front shaft. The writing tip of ｀ protrudes from the tip end of the front shaft.

FIGS. 3 and 4 show another example of the engagement between the projection 17 of the cylindrical cam and the central shaft 1 °. In this case, as means for fitting the projection 17 into the circumferential groove 60,
A partition wall 62 having an inclined surface 63 is provided on an upper wall of a guide groove 61 in which the projection 17 is fitted from the rear end of the central shaft 1 #.
The reason for providing the partition wall 62 is to enhance the rigidity of the center shaft 1 ° at the engaging portion.

[0023]

When the cap 45 is rotated in one direction with respect to the front shaft 3 or the center shaft 1, the notch 15 provided at the tip of the cam slope 14 of the cylindrical cam 5 slides on one of the mechanical pencils 7 as shown in FIG. The writing tip is engaged with the moving piece 6 and its writing tip projects from the tip end of the front shaft. At this time, the projection 17 of the cylindrical cam 5 is located in the wide groove 55 in the circumferential groove 19 of the center shaft 1. In this state, when the rear end of the crown 46 is knocked and the cylindrical cam 5 is axially moved, the operation is transmitted to the sliding piece 6, the core pipe 23, and the mechanical pencil 7, and the step 28 of the writing tip is moved. From a state in which the chuck comes into contact with the inner step portion 27 of the front shaft 3, the chuck moves along with the joint 29 so that the core is extended.

The cap 4 is attached to the front shaft 3 or the center shaft 1.
When the dial 5 is rotated to the other side, the mechanical pencil 7 is retracted, and instead, the writing tip of the writing instrument 8 such as a ball-point pen projects from the front end of the front shaft. When the writing body is stored or when the writing body such as a ball-point pen is projected, the projection 17 is located in the narrow groove 56 of the circumferential groove 19 and knocks on the rear end of the center shaft 1 to the rear shaft 4.
When the wall 20 is in contact with the front wall 5 of the circumferential groove 19,
Since it does not come into contact with 8, the projections and the like do not break.

Next, the cap 4 is moved from the outer cylindrical portion 34 of the rear shaft 4.
5 is removed, the stamp face 39 of the seal 37 is exposed.
Seal 9 facing down. Since the cap 45 is not in contact with the outer periphery of the seal 37 when the cap 45 is attached or detached, the seal 37 does not accidentally come off the inner cylindrical portion 33. Also, when the crown 46 at the rear end of the cap 45 is removed, the eraser 52 is exposed, and erroneous characters can be corrected when a mechanical pencil is used.

[0026]

As described above, according to the present invention, since the cap is fixed to the rear shaft in a non-contact state with the outer periphery of the seal, the problem of inadvertent removal of the seal is eliminated. Further, since a long cap of a fountain pen shape is attached, the appearance is good, and the problem that the finger is stained or lost when the cap is attached or detached is solved. In addition, a resin rear shaft is provided integrally behind the cylindrical cam,
Since the guide tube is integrally provided on the resin center shaft, parts are omitted, assembly is simplified, and cost is reduced.

[Brief description of the drawings]

FIG. 1 is an overall vertical cross-sectional view showing an embodiment of the present invention, and is partially non-cross-sectional.

FIG. 2 is an explanatory diagram showing an engagement state between a projection of a cylindrical cam and a peripheral groove of a center shaft.

FIG. 3 is an explanatory view showing another example of an engagement state between a projection of a cylindrical cam and a peripheral groove of a center shaft.

FIG. 4 is a cross-sectional view of a main part of an engaging portion in FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 center shaft 1 ｀ center shaft 2 guide tube 3 front shaft 4 rear shaft 5 cylindrical cam 6 sliding piece 6 ｀ sliding piece 7 mechanical pencil writing body 8 writing body such as ballpoint pen 9 guide groove 9 ｀ guide groove 10 cylinder part 11 knock spring 12 Engagement groove 13 Engagement part 14 Cam slope 15 Notch 16 Partition part 17 Projection 18 Vertical groove 19 Peripheral groove 20 Wall 21 Window 22 Projection 22 ｀ Projection 23 Core pipe 24 Flange part 25 Tail plug 26 Locking part 27 Inner part 28 Step 29 Joint 30 Return spring 30 ｀ Return spring 31 Step 32 Hole 32 ｀ Hole 33 Inner tube 33 筒 Slot 34 Outer tube 34 ｀ Outer tube 35 Flange 36 Engagement unit 37 Seal 38 Printing body 39 Printing surface 40 mounting base 41 flange 42 rear shaft 43 front shaft 44 cover 45 cap 46 crown 47 clip 48 joint 49 Pacer 50 fixed brackets 51 stop 52 eraser 53 inclined surface 54 Habasema 55 Habahiromizo 56 Habasemamizo 57a rear wall 57b inclined face 57c rear wall 58 front wall 60 peripheral groove 61 guide groove 62 partition wall 63 inclined surface

Claims (3)

(57) [Claims] An engaging portion for fitting the leading end of the front shaft and the center shaft in a non-rotatable and non-removable state is provided to fix the both, and at least a plurality of guide grooves of a guide cylinder integrated with the center shaft are provided. One of the pencils is a pencil pencil, and each of the pencils is fitted between the guide cylinder and the sliding piece so that it can move back and forth by energizing a return spring, and the cam slope displaced in the axial direction is circled at the front end. The circumferentially provided cylindrical cam is rotatably and axially retained with respect to the guide cylinder or the central shaft, and each sliding piece is brought into contact with the cam slope to alternately move back and forth by rotation of the cylindrical cam with respect to the front shaft or the central shaft. In the compound writing tool, the leading end of each writing body can be selectively protruded and retracted from the leading end port of the front shaft, a rear shaft is provided integrally on the outer periphery of the rear of the cylindrical cam, and the rear end of the rear shaft is provided. Seal is fixed to the rear end of the rear shaft A long fountain pen-shaped cap is detachably fixed to the outer periphery of the seal in a non-contact state, and the tip of the mechanical pencil is protruded, and the core is extended with the axis transition of the cap with respect to the front shaft and the center shaft. A writing implement with a seal, characterized in that it is configured as described above. 2. A center shaft integrally formed with a front shaft and a guide cylinder is formed of a resin molded product, and a substantially L-shaped circumferential groove is formed in a circumferential surface near a rear end of the center shaft to form a peripheral portion. The protrusion formed on the peripheral surface of the cylindrical cam is elastically fitted into the groove, so that the cylindrical cam can rotate in an appropriate range with respect to the center shaft, so that at least the tip of the mechanical pencil is projected so that the shaft changes. 2. The writing instrument with a seal according to claim 1, wherein the writing instrument is prevented from falling off. 3. The rear shaft has a cylindrical cam having a cam slope at a front end, an inner cylindrical portion for fixing a seal behind the cylindrical cam, and an outer cylindrical portion connected to the outer periphery of the cylindrical cam. It is composed of a molded product, and furthermore, the engaging portion for fixing the outer shaft and the cap is provided between the outer peripheral portion of the outer cylindrical portion and the inner peripheral portion of the cap. The writing implement with a seal according to claim 1, which is provided.