JP2607096Y2 - 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 of a so-called seal-equipped writing implement in which the tips of a plurality of writing bodies are alternately allowed to come and go at a front end of a front shaft and a seal is attached to the rear end of a cap.

[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 filed by the present applicant, a sliding groove for guiding two writing objects is provided on a front shaft. At 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 a front end portion, and a rear end is formed as a knock portion with respect to the cap. A cylindrical cam mounted so as to be movable in the axial direction and to rotate in the circumferential direction is integrated. There are multiple writing instruments that can appear and disappear.
It is well known that a seal is attached to the rear end of the cap, and the outer periphery of the seal is covered with a stamp surface and a knock cover is attached.

[0003]

The prior art described above has a complicated structure, a large number of parts, and a high cost. Further, if the engagement between the knock cover and the outer periphery of the seal is too strong, there is a problem that the seal is detached by attaching and detaching the knock cover.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a writing instrument with a seal according to the present invention is provided. A plurality of writing bodies, each having at least one mechanical pencil, are slid with the guide cylinder in a plurality of guide grooves of the guide cylinder integrated with the center shaft by respectively providing engagement portions to be fitted. A return spring is provided between the top and the top to urge each writing body backward and fit back and forth freely, and the cam slope that is displaced in the axial direction is provided on the side of the cylindrical cam that is provided circumferentially at the front end. A projection is provided, and the projection is elastically fitted into a peripheral groove formed through a narrow portion from a longitudinal groove on the rear side surface of the center shaft, and the cylindrical cam rotates within a certain range with respect to the guide cylinder and the center shaft while the shaft shifts. And keep each sliding piece against the cam slope. By rotating the cylindrical cam with respect to the front shaft or the center shaft, each sliding piece is alternately moved in the front-rear direction, so that the tip of each writing body can selectively appear and disappear from the front shaft tip port, only when the mechanical pencil is selected. In this case, the core can be extended by changing the axis of the cylindrical cam. In addition, the writing implement with seal of the present invention is provided with a resin cap integrally provided behind the cylindrical cam, and provided with a slightly larger outer cylinder portion behind the cap. An inner cylinder part is provided in the inner hole, and a middle cylinder part is provided outside of the inner cylinder part. A seal is removably fastened between the inner cylinder part and the middle cylinder part, and a knock cover is attached to and detached from the outer periphery of the middle cylinder part. The knock cover is freely fixed and the knock cover is brought into non-contact with the outer periphery of the seal.

[0005]

1 and 3 show an embodiment of the present invention. The writing implement with a seal of the present invention is a center shaft 1 having a guide tube 2 integrated therewith, a tip shaft 3, a cap 4 integrally having a cylindrical cam 5, a pair of sliding pieces 6, 6 ｀, a pencil pencil writing body 7, a ballpoint pen, and the like. Cursive 8, seal 35, knock cover 4
6 is a main component. First, the center shaft 1 is made of resin, and as shown in FIG. 1, has an axially long guide groove 9 opened to the side surface from a substantially central portion to a rear end, and a similar guide groove 9 # on the opposite side surface. A guide tube 2 is provided. The front half of the guide tube 2 communicates with each of the guide grooves 9, 9 孔 and has a hole 32,
A cylindrical portion 10 having a partition portion 16 having an angle of 32 ° and having an open front end is provided, and a step portion 31 is provided at the rear end of the cylindrical portion 10. A joining portion 13 is formed.

On the rear side surface of the center shaft 1, as shown in FIG. 2, a longitudinal groove 18 is connected to a circumferential groove 19 via a slope 50 at the front, and a substantially L-shaped window is formed. Are drilled. As will be described later, the projection 17 of the cylindrical cam 5 is inserted from the vertical groove 18, and the projection 17 elastically expands the inclined surface 50, passes through the narrow portion 51, 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. In addition, the pencil 19 protrudes from the circumferential groove 19.
The axial movement of the cylindrical cam 5 is possible at the position of the projection 17
The wide groove 52 is provided so as to further store the cursive
Position of projection 17 when writing body 8 such as ballpoint pen projects
The rear wall 54a so that the cylindrical cam 5 becomes substantially incapable of shifting.
The inclined surface 54b is connected to the rear wall 54c, and the narrow groove 5 is formed.
3 are provided. As will be described later, the wall 20 of the cap 4 comes into contact with the rear end of the center shaft 1 at the front end of the shaft transition, and
Is set so that the front end does not contact the front wall 55 of the circumferential groove 19.

[0007] The front end of the shaft 3 is tapered, and the front end of the shaft 3 has an inner step 27 at the end of the inner hole. In the rear end hole, an engagement groove 12 is provided, which engages with an engagement portion 13 provided on the outer peripheral portion of the cylindrical portion 10 of the guide cylinder, and prevents the cylindrical portion 10 from slipping out and rotating. . The cylindrical portion 10 and the front shaft 3 are detachably fixed by an appropriate force. (Showa 6
(Same as the configuration of the front shaft in JP-A-4-3491)

The cap 4 is made of resin and has a cylindrical cam 5 at the tip.
Are integrally provided. The cylindrical cam 5 has a cylindrical shape, and has a cam slope 14 that is displaced circumferentially back and forth at a front end edge, and a notch 15 is formed at the foremost end of the cam slope 14. or,
On the side surface of the cylindrical cam 5, there is formed a projection 17 which is inserted into the vertical groove 18 of the center shaft 1 and elastically fits into the circumferential groove 19 to rotate and prevent it from falling out within a certain range (about 180 degrees).

Incidentally, the cap 4 has a cylindrical portion connected to the cylindrical cam 5 behind the wall by a wall 20 and an outer cylindrical portion 45 having a slightly larger diameter is provided behind the cylindrical portion. The inner bore is provided with an inner cylindrical portion 33 extending rearward of the cylindrical cam 5 and having a slit 34 on an outer peripheral portion. A middle cylinder portion 43 having a circumferential groove-shaped locking portion 44 on the outer periphery is provided between the inner cylinder portion and the outer cylinder portion. A clip 49 is provided on the outer periphery of the outer cylinder 45.

A front shaft portion 41 of a mounting base 38 for the seal 35 is detachably fitted between the inner cylindrical portion 33 and the middle cylindrical portion 43. Further, a cylindrical body 47 ahead of the knock cover 46 is fitted around the outer periphery of the middle cylindrical portion 43 in a non-contact state with the outer periphery of the seal 35, and an inwardly projecting engagement formed at a required portion on the outer periphery of the cylindrical body 47. The stopping portion 48 engages with the locking portion 44 of the middle cylinder portion 43,
The knock cover 46 is detachably fixed to the middle cylinder portion 43. The cylindrical body 47 may be press-fitted and fixed separately from the knock cover 46 or may be formed integrally. Further, the printing body 36 constituting the seal 35 is made of a printing material such as a continuous porous rubber capable of absorbing ink, and has a printing surface 37 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 surface of the projection 22 and both sides of the sliding piece 6 have substantially the same inclination 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, the sliding pieces 6 and 6 # are connected to the rear end, respectively. 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 face of the guide grooves 9, 9 ｀.
6 is urged rearward by return springs 30 and 30 # interposed between the springs. The cap 4 is configured such that the cylindrical cam 5 is inserted into the rear end hole of the central shaft 1 so that 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 is prevented from coming off. Is stopped. In a state where the mechanical pencil 7 is protruded, the cap 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 is protruded. The axis transition is made impossible. Each sliding piece 6, 6 ｀
Is always urged rearward by the return springs 30 and 30 °, so that the cam slopes of the projections 22 and 22 ° always contact the cam slope 14 of the cylindrical cam 5. In addition, separately from the embodiment, a flange-shaped protrusion is provided in the inner hole of the cylindrical cam, a circumferential groove is provided on the outer periphery of the rear end of the guide cylinder, and the protrusion is elastically fitted into the circumferential groove. May be configured to be rotatable with respect to the guide cylinder and to prevent it from falling off.

The engaging portion 13 of the cylindrical portion 10 is elastically fitted into the engaging groove 12 of the front shaft 3 while the rear end surface of the front shaft 3 is 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 they are stopped from rotating and come off. The tip shaft 3 is detachable with an appropriate force. When the cap 4 is rotated in one direction with respect to the front shaft 3 or the center shaft 1 in this state, the sliding piece 6 advances, and the notch 15 at the foremost end of the cam slope 14 of the cylindrical cam 5 becomes 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. Further, when the cap 4 is rotated to the other end with respect to the front shaft 3 or the center shaft 1, the sliding piece 6 is retracted so that the writing tip of the mechanical pencil 7 penetrates from the tip of the leading shaft and the sliding piece 6 is moved.前進 moves forward, and the writing tip of the writing body 8 such as a ballpoint pen projects from the tip end of the front shaft.

FIGS. 3 and 4 show other examples of the engagement between the projection 17 of the cylindrical cam and the center 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.

[0016]

When the cap 4 is rotated in one direction with respect to the front shaft 3 or the center shaft 1, the cam slope 1 of the cylindrical cam 5 is rotated as shown in FIG.
A notch 15 provided at the front end of the pen 4 engages with the sliding piece 6 of one of the mechanical pencils 7 to protrude the writing end from the front end of the front shaft. At this time, the projection 17 of the cylindrical cam 5 is located in the wide groove 52 in the circumferential groove 19 of the center shaft 1. In this state, when the rear end of the crown 37 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 the state in which the chuck abuts on the inner step portion 27 of the front shaft 3, the chuck moves along with the joint 29 so that the core is extended. When the cap 4 is rotated to the other end with respect to the front shaft 3 or the center shaft 1, the mechanical pencil 7 is retracted, and the writing tip of the writing body 8 such as a ball-point pen projects from the tip of the front shaft. In addition, when the cursive body is stored, when the cursive body such as a ballpoint pen is projected,
Projection 17 is positioned in the width narrow groove 53 of the circumferential groove 19, and a state in which the wall 20 of the cap 4 to the rear end of the center pole 1 to knock abuts
That is , since the projection 17 does not contact the front wall 55 of the circumferential groove 19, the projection and the like do not break. Next, when the knock cover 46 is removed from the rear end of the cap 4, the stamp face 37 of the seal 35 is removed.
Is exposed, and the seal is applied with the stamp surface 37 facing downward. still,
Since the knock cover 46 is in a non-contact state with the outer periphery of the seal 35 due to its attachment and detachment, the seal 35 does not come off the cap 4 carelessly. Further, in the embodiment, at least one of the cursive type is a mechanical pencil type, but may be another type of cursive type such as a ballpoint pen.

[0017]

As described above, according to the present invention, the resin cap is provided integrally behind the cylindrical cam, and the guide cylinder is provided integrally with the resin center shaft, so that parts are omitted. In addition, the cost is reduced because the assembly is simple. Further, since the knock cover is fixed to the cap in a non-contact state with the outer periphery of the seal, the problem that the seal is accidentally detached is solved. Further, according to the embodiment, even if a shock such as a drop is applied, the wall of the cap is in contact with the rear end of the center shaft, and no excessive force is applied to the projection of the cylindrical cam, so that problems such as breakage can be avoided. effective.

[Brief description of the drawings]

FIG. 1 is an overall longitudinal sectional view showing an embodiment of the present invention, and is partially non-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 2 guide cylinder 3 tip shaft 4 cap 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 step 28 Step part 29 Joint REFERENCE SIGNS LIST 30 return spring 30 リ タ ー ン return spring 31 step 32 hole 32 孔 hole 33 inner cylinder 34 slot 35 seal 36 printing body 37 stamped surface 38 mounting base 39 flange 40 rear shaft 41 front shaft 42 cover 43 middle cylinder 44 Locking part 45 Outer cylinder part 46 Knock cover 47 Tubular body 48 Locking part 49 Clip 50 Inclined surface 51 Narrow part 52 Wide part 53 Narrow groove 54a Rear wall 54b Inclined surface 54c Rear wall 55 Front wall 60 Peripheral groove 61 Guide groove 62 Partition wall 63 Inclined surface

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B43K 29/013 B41K 1/02 B43K 24/18 B43K 24/14

Claims (2)

(57) [Scope of request for utility model registration] A plurality of guide cylinders integrated with a center shaft are provided by providing engaging portions for fitting the front end of the resin shaft and the center shaft of the resin in a non-rotatable and non-removable state. A return spring is provided between the guide cylinder and the sliding piece in the guide groove of each of the above, and each of the writing bodies is urged rearward, and is fitted so that it can move back and forth, and the cam slope displaced in the axial direction is provided. A cylindrical cam provided circumferentially at the front end is rotatably 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 rotate the cylindrical cam with respect to the front shaft or the central shaft. By moving back and forth, the tip of each writing body can be selectively protruded and retracted from the tip end of the front shaft, a resin cap is provided integrally behind the cylindrical cam, and the cap of the cap is provided. A slightly large outer cylinder is provided at the rear, An inner cylinder portion is provided in the inner hole of the outer cylinder portion, and a middle cylinder portion is integrally provided outside the inner cylinder portion. A seal is detachably fastened between the inner cylinder portion and the middle cylinder portion, and A writing implement with a seal, wherein a knock cover is detachably attached to an outer periphery of the part without contacting an outer periphery of the seal. 2. A seal with a seal according to claim 1, wherein at least one of the pencils is a mechanical pencil, and the cylindrical cam is axially shifted with respect to the center shaft and the guide tube so that the core can be fed out. Writing implement.