JPH0712064Y2 - Writing instrument with seal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a writing instrument in which a seal is removably integrated.

(Prior Art) Conventionally, a part such as a spring cylinder has been used as a means for making a seal immovable with respect to the cap body, as shown in Japanese Utility Model Laid-Open No. 63-25586, for example. However, there was a problem that it was complicated, dimension control was difficult, and the processing cost was high.

(Problems to be solved by the invention) The present invention makes it possible to attach / detach the seal to / from the cap body by using an extremely simple component as compared with the component such as the spring cylinder of the above-mentioned conventional example, thereby achieving cost reduction. It is intended.

(Means for Achieving the Object) In order to achieve the above object, the writing instrument with a seal in the present invention has a side surface portion near the upper end of a cap inner cylinder (3) fixed inside a cap body (1) having an open upper end. A circumferential groove (3c) is provided in the groove and a rib (3e) is formed in a part of the groove (3c).
The C-ring (4) is non-rotatably fitted into the groove (3c) with the edges (4a) on both sides of the gap sandwiching the rib (3e), and the seal body (8) is attached to the upper end. The lower end fitting tubular portion (5c) of the seal receiving member (5) holding the) is detachably attached to the outer peripheral portion of the portion where the C ring (4) is fixed in the inner cap (3) of the cap, and elastic force due to radial deformation. Based on C
The contact friction with the inner surface of the fitting cylinder portion (5c) of the ring (4) provides a fixing force for the axial withdrawal of the seal (5), and the edges (4a) on both sides of the gap of the C ring (4). )
The rotation of the seal receiving member (5) is prevented by the contact with the inner surface of the fitting cylindrical portion (5c) by the above.

(Example) Hereinafter, an example will be described with reference to the drawings. The cap body (1) has both upper and lower ends opened, and the clip (2) is integrally attached to the outer surface near the upper end, and the screw (1a) is provided on the inner surface of the lower end. The cap inner cylinder (3) has a flange portion (3a) at the lower end on the outer surface portion and a screw portion (3b) immediately above it, and the upper half portion has its outer diameter slightly reduced to its upper end. A circumferential groove (3c) is provided on the side surface portion in the vicinity, a rib (3e) is provided on a part of the groove (3c), and a cam portion (3d) is provided on the inner surface portion. The cap inner cylinder (3) is inserted into the cap main body (1) from the lower end opening, the screw parts (3b) (1a) are screwed together, and the flange part (3a) is attached to the lower edge of the cap main body (1). It is fixed in a contacted state. A C-ring (4) is fitted in a groove (3c) near the upper end of the cap inner cylinder (3) such that both edges (4a) of the gap sandwich the rib (3e). Next, the seal stamper (5) has a closed top surface (5a) at the upper end, and a small diameter vent hole (5b) at an arbitrary position.
And a fitting cylinder part (5c) with a lower end opened in the lower half
And a flange (5d) is provided on the middle height of the outer surface. The cushion material (6) and the filter (7) are sequentially placed on the top surface (5a) of the seal stamp receiver (5), and the seal stamp main body (8) which has absorbed ink is placed thereon, and further the seal stamp main body ( A seal cover (9) having an opening (9a) on the top surface for exposing the upper face (print face) of 8) covers the seal body (8), the filter (7) and the side face of the cushion material (6). Thus, the lower end portion of the seal stamp cover (9) is fitted to the outer peripheral portion of the upper end of the seal stamp receiver (5). A seal cap (10) covering the upper surface of the seal main body (8) is detachably fitted to the outer peripheral portion of the seal cover (9). The seal receiving member (5) has a lower end fitting cylindrical portion (5c) which can be attached to and detached from an outer peripheral portion of a portion of the cap inner cylinder (3) to which the C ring (4) is fixed. The C ring (4) is slightly compressed in the radial direction in the state where the seal receiving member (5) is attached, and due to the elasticity caused by the deformation, the C ring (4) is attached to the inner surface of the fitting cylindrical portion (5c) of the seal receiving member (5) and there. A certain frictional force is generated between the contacting C rings (4), and this frictional force is received by the seal stamp (5).
It serves as a fixing force against the axial pulling out of the. Further, the edges (4a) on both sides of the gap of the C ring (4) are fitted with the fitting tubular portion (5c).
On a microscopic scale, the inner surface of the seal is in contact with the seal so as to prevent the seal (5) from rotating. A writing body receiver (11) which is moved up and down by a cam portion (3d) of the cap inner cylinder (3) by the rotation operation of the cap body (1) is accommodated in the cap inner cylinder (3), and a ballpoint pen refill. The upper groove of the (12) is inserted into and supported by the cursive receiver (11). A tip shaft (13) is rotatably joined to the cap inner cylinder (3), and a spring (14) for urging the ball-point pen refill (12) upward is attached to the inner surface of the lower end of the tip shaft (13). ing.

(Operation and effect) The present invention is as described above, and since the C ring is fixed to the inner cap of the cap and the elastic force of the C ring frictionally fits the seal stamper, the seal stamper is detachable. The structure is much simpler than the one using parts such as the spring cylinder, and the parts can be easily machined and assembled, thus reducing the cost. Further, since the edges on both sides of the gap of the C ring prevent the seal stamp from rotating and regulate the direction of the seal stamp, there is an advantage that the rotation preventing portion of the seal stamp can be omitted.

[Brief description of drawings]

FIG. 1 is an overall sectional view, and FIG. 2 is an exploded perspective view of main parts. (1) …… Cap body, (3) …… Cap inner cylinder,
(3c) ... Groove, (4) ... C-ring, (5) ... Stamp receiving, (6) ... Cushion material, (7) ... Filter,
(8) …… Seal body, (9) …… Seal cover, (10)…
… Seal cap, (11) …… cursor receiver, (12) …… ballpoint pen refill, (13) …… leading shaft, (14) …… spring, (3e) …… rib, (4a) …… C Edges on both sides of the ring gap.

Claims (1)

[Scope of utility model registration request] 1. A circumferential groove (3c) is provided in a side surface portion near an upper end of a cap inner cylinder (3) fixed inside a cap body (1) having an open upper end, and a part of the groove (3c). A rib (3e) is provided on the upper end, and the C ring (4) is non-rotatably fitted into the groove (3c) with the edges (4a) on both sides of the gap sandwiching the rib (3e). The lower end fitting tubular portion (5c) of the stamp receiving member (5) holding the stamp main body (8) is detachably attached to the outer peripheral portion of the portion of the cap inner tube (3) to which the C ring (4) is fixed, and has a radius of By the contact friction of the C ring (4) with the inner surface of the fitting cylindrical portion (5c) based on the elastic force due to the deformation in the direction, a fixing force for the axial withdrawal of the seal stamp (5) is obtained and the C ring (4) Edges on both sides of the gap (4
A writing instrument with a seal, characterized in that rotation of the seal receiver (5) is prevented by contacting the inner surface of the fitting tubular portion (5c) by a).