JP3633952B2 - Writing instrument with seal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a so-called stamp-equipped writing instrument in which the front ends of a plurality of writing bodies can alternately appear and disappear at the front end of the front shaft and a seal is attached to the rear end of the rear shaft.
[0002]
[Prior art]
Conventionally, as an example of a dual-type writing instrument, as shown in Japanese Utility Model Publication No. 64-3491 by the same applicant, a guide having a sliding groove for guiding two writing bodies and fixed to a front shaft. It has a cam slope on the front end that contacts the cylinder and the sliding piece attached to the two cursives fitted to the guide cylinder, and the rear end is a knock part that moves in the axial direction relative to the rear shaft. A cylindrical cam is mounted so that it can freely rotate in the circumferential direction, and two cursives can be selectively projected and retracted at the front end of the front shaft by rotating the rear shaft relative to the front shaft. There is a double writing instrument. Further, it is well known that a stamp is attached to the rear end of the rear shaft, and a knock cover is attached to the outer periphery of the seal by covering the stamp surface.
In addition, this type of conventional writing instrument with a seal is formed with a large diameter in which the diameter of the seal attachment portion of the rear shaft is extremely bulged with respect to the diameter of the front shaft, and the appearance is poor.
[0003]
[Problems to be solved by the invention]
The writing instrument with a seal stamp of the conventional example has a bad appearance, and if the engagement between the cap and the outer periphery of the seal stamp is too strong, there is a problem that the seal stamp is detached by attaching and detaching the cap. Moreover, since the cap is small, there is a problem that the finger is easily soiled or lost when the cap is attached or detached.
An object of the present invention is to solve the above problems.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the writing instrument with a seal according to the present invention is provided with an engaging portion that fits the tip end of the front shaft and the center shaft in a non-rotatable and non-removable state, respectively, and fixes them together. In the guide cylinder integrated with the middle shaft and the guide grooves in the guide cylinder, a ball-point pen writing body is fitted between the guide cylinder and the sliding piece to urge the return spring so that it can move back and forth. A cylindrical cam having a circumferentially inclined cam slope is provided on the front end so as to be rotatable with respect to the guide cylinder or the center shaft. The tip of each ballpoint pen can be selectively moved in and out of the tip of the tip of the tip. Also, a rear shaft is integrally provided on the rear outer periphery of the cylindrical cam, and a seal is fixed to the rear end of the rear shaft. A long fountain pen-shaped cap with a closed rear end is formed on the outer periphery of the rear shaft. It is fixed to be detachable in a non-contact state.
[0005]
【Example】
FIG. 1 and FIG. 4 show an embodiment of the present invention. The writing instrument with a seal of the present invention includes a middle shaft 1 integrally provided with a guide tube 2, a front shaft 3, a rear shaft 4 integrally provided with a cylindrical cam 5, a pair of sliding pieces 6, 6 ｀, and ballpoint pen writing materials 7, 7 The bag, seal 29, and cap 37 are the main components. First, the middle shaft 1 is made of resin, and as shown in FIG. 1, it has a guide groove 8 that is long in the axial direction and is open on the side surface from the substantially central portion to the rear end, and a similar guide groove 8 に on the opposite side surface. A guide tube 2 is provided. The front half of the guide tube 2 is provided with a tube portion 9 provided with a partition portion 14 having holes 24 and 24 し て in communication with the guide grooves 8 and 8 て and having a front end opened. A bulging engagement portion 11 is formed at the front outer peripheral portion.
[0006]
Further, as shown in FIG. 2, a longitudinal groove 16 is connected to a circumferential groove 17 on the rear side surface of the central shaft 1 through a front inclined surface 16a, and a substantially inverted T-shaped window portion is perforated. It is installed. As will be described later, the projection 15 of the cylindrical cam 5 is inserted from the vertical groove 16, and the projection 15 elastically expands the inclined surface 16 a and passes through the narrow portion 16 b and enters the circumferential groove 17. The cylindrical cam 5 rotates while the projection 15 contacts the rear wall 17b in the circumferential direction of the circumferential groove 17, and the writing tip portion of the ballpoint pen writing body 7 or the ballpoint pen writing body 7 ｀ alternately appears and disappears from the front end of the front shaft. It will be. By the way, since the front end of the protrusion 15 is prevented from moving forward by the front wall 17 a of the circumferential groove 17, the cylindrical cam 5 does not shift relative to the middle shaft 1. Further, when there is a risk that the protrusion 15 is damaged due to a drop impact from the rear end side, a gap is provided between the front wall 17a and the front end of the protrusion 15, and the wall 18 of the rear shaft 4 is provided at the rear end of the middle shaft 1. What is necessary is just to make it the front end of the protrusion 15 not contact | abut to the front wall 17a in the state which contact | abuts. (Not shown)
[0007]
The front shaft 3 has a tapered front part, and a tip end where the writing tip part appears and disappears is provided at the tip of the inner hole part. Further, the rear end hole is provided with an engaging groove 10 that is engaged with an engaging portion 11 provided on an outer peripheral portion of the cylindrical portion 9 in front of the guide cylinder and is prevented from coming off and rotating with respect to the cylindrical portion 9. Yes. In addition, the cylinder part 9 and the front shaft 3 are detachably fixed with an appropriate force. (Same as the structure of the front shaft in Japanese Utility Model Publication No. 64-3491)
When replacing the ballpoint pens 7 and 7, the front shaft 3 is pulled out with respect to the middle shaft 1, but in order to simplify the operation from the relationship between the rear shaft 4 and the attachment / detachment of the cap 37, which will be described later, 9 and the rear end hole of the front shaft 3 can be said to be preferably a screw.
[0008]
The rear shaft 4 is made of resin, and has a cylindrical cam 5 at the tip. The cylindrical cam 5 has a cylindrical shape, and has a cam slope 12 that is circumferentially displaced at the front end edge, and a notch 13 is formed at the foremost end of the cam slope 12. Further, a projection 15 is formed on the side surface of the cylindrical cam 5 so as to be inserted into the longitudinal groove 16 of the central shaft 1 and elastically fitted into the circumferential groove 17 to be rotated and prevented from coming off within a certain range (approximately 180 degrees). .
[0009]
Further, the rear shaft 4 is connected to the rear side of the cylindrical cam 5 by a wall 18 and is integrally provided with a front outer cylindrical portion 26 and a rear outer cylindrical portion 26 、, which are provided inside the outer cylindrical portion 26 ｀. Is provided with an inner cylinder portion 25 extending rearward of the cylindrical cam 5 and having a slot 25 on the outer peripheral portion. Further, a flange portion 27 that abuts a front end of a cap 37 described later is formed at the front end of the outer cylinder portion 26, and an engagement portion 28 that engages with the inner peripheral portion of the cap 37 is formed at the outer peripheral portion. .
[0010]
If the cap 37 is made of resin, the engaging portion 28 can be selected from a concave and convex engaging portion, a frictional engagement such as a rib, and a screw. If the cap 37 is made of metal, a metal cylinder is fixed to the outer periphery of the outer cylinder 26, and a rib-like engagement portion is provided on the outer surface of the cylinder, or the inner periphery of the cap 37 is engaged. Various means such as installing a wig with a joint are selected.
[0011]
A mounting base 32 for a seal stamp 29 is detachably fitted to the inner cylinder portion 25. Further, a cap 37 having a closed rear end is fitted into the outer periphery of the outer cylindrical portion 26 in a non-contact state with the outer peripheral portion of the seal stamp 29, and the front end of the cap 37 abuts against the collar portion 27. The cap 37 is detachably fixed.
The printing body 30 constituting the seal 29 is made of a continuous porous rubber or the like that can occlude ink, and has a marking surface 31 that can be stamped.
[0012]
Further, the sliding pieces 6, 6 ｀ have projections 20, 20 ｀ on the outer surface, the central portion protrudes from the rear end face of the projections 20, 20 ｀, and both sides of the cam slope 12 of the cylindrical cam 5 described above. And a cam slope with substantially the same slope. Further, locking portions 21 and 21 す る for fixing the rear ends of the ball-point pen writing bodies 7 and 7 ｀ are provided at the tip. In addition, the latching | locking part can be made into a pipe shape and can also fit the rear end of a cursive body.
[0013]
Next, the assembly sequence will be described. The ballpoint pens 7 and 7 ｀ are connected to the respective guide grooves 8 and 8 の 中 of the above-mentioned guide tube 2 of the center shaft by connecting the sliding pieces 6 and 6 ｀ to the rear ends. It is movably fitted and urged rearward by return springs 22 and 22 ｀ interposed between the front end surfaces of the sliding pieces 6 and 6 と and the guide grooves 8 and 8 ｀ front partition 14. .
[0014]
The rear shaft 4 has a cylindrical cam 5 inserted into the rear end hole of the middle shaft 1 and the projection 15 is elastically fitted into the circumferential groove 17 so that the rear shaft 4 is rotatable and prevented from coming off in the circumferential direction at about 180 degrees. Then it is fixed. Further, since the sliding pieces 6 and 6 常 時 are always urged rearward by the return springs 22 and 22 ｀, the cam inclined surfaces of the projections 20 and 20 ｀ are always in contact with the cam inclined surface 12 of the cylindrical cam 5. Keep.
In addition, apart from the embodiment, a cylindrical cam is provided with a flange-like projection 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 projection is elastically fitted into the circumferential groove. It is also possible to configure so that the guide tube is rotatable with respect to the guide tube and is prevented from coming off.
[0015]
Further, the rear end surface of the front shaft 3 is in contact with the front surface of the step portion 23 of the middle shaft 1, and the engaging portion 11 of the cylindrical portion 9 is elastically fitted in the engaging groove 10 of the front shaft 3, The shaft 3 and the middle shaft 1 are fixed in a rotation-preventing and retaining state. The front shaft 3 can be attached and detached with an appropriate force.
[0016]
A seal stamp 29 is fixed to the inner cylinder portion 25 of the rear shaft 4 with the marking surface 31 facing rearward, and a cap 37 is fixed to the outer cylinder portion 26.
In this state, when the cap 37 is rotated in one direction with respect to the front shaft 3 or the middle shaft 1, the sliding piece 6 moves forward so that the notch 13 at the foremost end of the cam slope 12 of the cylindrical cam 5 is formed on one of the ballpoint pens 7. The writing tip is locked to the protrusion 20 of the sliding piece 6 so that the writing tip protrudes from the tip end of the front shaft. Further, when the cap 37 is rotated to the other side with respect to the front shaft 3 or the middle shaft 1, the sliding piece 6 is retracted and the writing tip portion of the ball-point pen writing object 7 is immersed from the front end of the front shaft, and the sliding piece 6? Advances, and the writing tip of the other ballpoint pen writing body 7 ｀ projects from the tip end of the front shaft.
[0017]
FIGS. 3 and 4 show other examples of the engagement between the cylindrical cam protrusion 15 and the center shaft 1 mm. In this case, as a means for fitting the protrusion 15 into the circumferential groove 43, a partition wall 44 having an inclined surface 45 is provided on the upper wall of the guide groove 46 for fitting the protrusion 15 from the rear end of the center shaft 1 軸. . The reason for providing the partition wall 44 is to reinforce the rigidity of the central shaft 1 ｀ in the engaging portion.
[0018]
[Action]
When the cap 4 is rotated in one direction with respect to the front shaft 3 or the middle shaft 1, the notch 13 provided at the tip of the cam inclined surface 12 of the cylindrical cam 5 and the sliding piece 6 of one ballpoint pen writing body 7 as shown in FIG. Engage and project the writing tip from the tip end of the front shaft. At this time, the protrusion 15 of the cylindrical cam 5 is located at the left end shown in FIG.
Further, when the cap 4 is rotated to the other side with respect to the front shaft 3 or the middle shaft 1, the ball-point pen writing body 7 moves backward, and instead, the writing tip portion of the ball-point pen writing body 7 ｀ protrudes from the front-end tip end. At this time, the projection 15 of the cylindrical cam 5 is located at the right end of the circumferential groove 17 shown in FIG.
Next, when the cap 37 is removed from the rear shaft 4, the marking surface 31 of the seal stamp 29 is exposed, and the outer peripheral portion of the rear shaft 4 is gripped and printed with the marking surface 31 facing downward. In addition, since the cap 37 is in a non-contact state with the outer peripheral portion of the seal stamp 29 due to its attachment and detachment, the seal stamp 29 will not be inadvertently detached from the rear shaft 4.
[0019]
【The invention's effect】
As described above, according to the present invention, since the cap is fixed to the rear shaft in a non-contact state on the outer periphery of the seal, the problem that the seal is inadvertently removed is solved.
In addition, since a long fountain pen cap is attached, the appearance is good, and the problem of soiling or losing fingers when the cap is attached or detached is solved.
In addition, a rear shaft made of resin is integrally provided behind the cylindrical cam, and a guide tube is integrally provided on the central shaft made of resin, so that parts are omitted and assembly is simplified and cost is reduced. Is reduced [Brief description of the drawings]
FIG. 1 is an overall longitudinal sectional view showing an embodiment of the present invention, which is partially non-cross-sectional.
FIG. 2 is an explanatory view showing an engagement state between a projection of a cylindrical cam and a circumferential groove of a central shaft.
FIG. 3 is an explanatory view showing another correspondence example of the engagement state between the projection of the cylindrical cam and the circumferential groove of the central shaft.
4 is a cross-sectional view of the main part of the engaging portion in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Medium shaft 1 shaft Medium shaft 2 Guide tube 3 Front shaft 4 Rear shaft 5 Cylindrical cam 6 Sliding piece 6 摺 動 Sliding piece 7 Ball pen writing body 7 ｀ Ball pen writing body 8 Guide groove 8 案 内 Guide groove 9 Tube portion 10 Engaging portion 11 Engagement part 12 Cam slope 13 Notch 14 Partition part 15 Protrusion 16 Vertical groove 16a Inclined surface 16b Narrow part 17 Circumferential groove 17a Front wall 17b Rear wall 18 Wall 19 Window 20 Protrusion 20 ｀ Protrusion 21 Locking part 21 ｀ Locking part 22 Return spring 22 リ タ ー ン Return spring 23 Step portion 24 Hole 24 ｀ Hole 25 Inner cylinder portion 25 ｀ Slot 26 Outer cylinder portion 26 ｀ Outer cylinder portion 27 鍔 portion 28 Engagement portion 29 Seal 30 Printing body 31 Marking surface 32 Mounting base 33 Hook 34 Rear shaft 35 Front shaft 36 Cover 37 Cap 38 Cap 39 Clip 40 Joint 41 Spacer 42 Fixing bracket 43 Circumferential groove 43a Front wall 43b Rear wall 44 Partition wall 45 Inclined 46 guide groove

Claims (3)

An engagement portion for fitting the other party of the front barrel and the center pole to one another non-rotatably and retaining state respectively provided to fix the both, a plurality of guide grooves of the guide tube and the guide tube integrated with the center pole, respectively ballpoint writing The body is fitted with a return spring between the guide cylinder and the sliding piece so as to be movable back and forth, and a cylindrical cam with a cam inclined surface that is displaced in the axial direction is provided circumferentially at the front end. By rotating the cylindrical cam with respect to the front shaft or the central shaft, the tip of each ballpoint pen writing body is moved back and forth alternately by rotating the cylindrical cam with respect to the front shaft or the central shaft. In the dual writing instrument that can be selectively projected and retracted from the front end, a rear shaft is integrally provided on the rear outer periphery of the cylindrical cam, and a seal is fixed to the rear end of the rear shaft, so that the outer peripheral portion of the rear shaft A long fountain pen-shaped cap with a closed back end Writing instrument with seal, characterized in that it is detachably fixed in a non-contact state. The front shaft and the central shaft integrally formed with the guide tube are each formed as a resin molded product, and a peripheral groove is formed in the peripheral surface near the rear end of the central shaft, and the peripheral groove is formed on the peripheral surface of the cylindrical cam. The writing instrument with a seal according to claim 1, wherein the projection is elastically fitted, and the cylindrical cam is prevented from coming off so as to be rotatable within an appropriate range with respect to the central shaft. The rear shaft is formed of a resin molded product in which a cylindrical cam having a cam inclined surface at the front end, an inner cylindrical portion that fixes a seal stamp behind the cylindrical cam, and an outer cylindrical portion that is connected to the outer periphery of the cylindrical cam are integrated. Furthermore, a flange portion is provided at the front end of the outer cylinder portion so that the front end of the cap abuts , and an engagement portion for fixing the rear shaft and the cap is provided between the outer peripheral portion of the outer cylinder portion and the inner peripheral portion of the cap. The writing instrument with a seal according to claim 1, which is provided.

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