JPH0453986Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention prevents the insertion of a clip into a clothing pocket, etc. while the tip of the cursive writing brush remains protruding from the tip of the shaft. The present invention relates to a knob-type writing instrument that has the function of preventing soiling of clothing pockets, etc.

(Prior art) Conventionally, this type of writing instrument was developed using Utility Model 61-107590.
As seen in the publication, a locking part is provided at the tip of the clip formed integrally with the knob body, and the clip is moved forward together with the knob body so that the writing part at the tip of the reel protrudes from the shaft tip opening. There is a known clip in which the distal end locking portion of the clip is engaged with a locking hole provided in the barrel. However, when the knob body and the clip are integrally molded as in this known example, especially when the clip is made of resin, the thin connecting part between the clip and the knob body becomes fatigued due to the swinging of the clip. There was a risk of it breaking. In order to solve such problems, for example, as seen in Japanese Utility Model Application Publication No. 159283/1983,
It is effective to form a clip independently and lock it to the barrel, and to bias the clip with a spring. However, such a configuration also has the following problems. In other words, since the clip is locked to the barrel, the movement of the clip is not smooth, and there is a risk that the clip will become unlatched and come off. The problem is that it is difficult to assemble.

(Problem to be Solved by the Invention) Therefore, the present invention prevents the clip from being inserted into a clothes pocket, etc. while the tip of the cursive writing brush remains protruding from the shaft tip opening, and prevents the insertion of the clip into a clothes pocket, etc. can prevent contamination, and
To provide a knob-type writing implement having advantages such that the clip does not break due to fatigue or the like, the clip moves smoothly, and the clip is easy to assemble.

(Means for Solving the Problems) In order to achieve the above object, the knob-type writing instrument of the present invention is provided with a locking part at the front end of the clip, and a pressing part and a mounting leg at the rear end to attach the clip. A support shaft is provided protruding from both sides of the leg, a groove is provided in the knob body that opens on one side, and a pair of support holes are provided at opposing locations in the side walls on both sides of the groove, and the mounting leg of the clip is attached. By storing it in the groove of the knob body and rotatably fitting the support shaft into the support hole, both the front and rear ends of the clip can be made to swing freely, and the spring that springs the front end of the clip in the direction of the shaft cylinder is attached to the clip. It is interposed between the mounting leg and the inner surface of the groove of the knob body, and engages with the locking part of the clip at the position where the knob body is advanced until the tip of the writing brush protrudes from the shaft tip opening. This is characterized in that a locking portion is provided on the side surface of the shaft cylinder.

(Embodiment) In the illustrated embodiment, the rear end is opened and an axial slit 1 is provided on the side surface at a point on the circumference from the rear end edge to a required distance forward position, and the required distance on the extension line forward of the slit 1 is provided on the side surface at a point on the circumference. A recess 3 whose rear wall is substantially perpendicular to the axis and the rear wall serves as a locking step 2, and a groove 4 cut out from the recess 3 in the center of the locking step 2 are provided. A resin shaft cylinder 6 is formed with a protrusion 5 circumferentially provided on the inner surface of the front position, and a cylinder part 8 into which the rear end of the writing body 7 is inserted is provided at the front end, and a cylinder part 8 is provided at the front end into which the rear end of the writing body 7 is inserted. A groove 9 that opens on one side to a required distance forward is provided, a pair of opposing support holes 10 are provided at required locations on the side walls on both sides of this groove 9, and a protrusion 11 is provided circumferentially on the outer surface of the front end of the cylindrical portion 8. A knob body 12 made of resin which can be elastically deformed is formed, and a ball part 13 is further provided near the front end, and both lateral side parts of the rear part of the ball part 13 are cut out, and the ball part 13 is sandwiched between the cutout parts 14. Ribs 15 are provided at the locations, and the front wall of the notch 14 is used as a locking step 16, and a plate-shaped mounting leg 17 whose thickness is slightly thinner than the width of the groove 9 of the knock body 12 is provided at the rear end. The mounting leg 17 has a support shaft 18 protruding from both lateral sides thereof, and a hole 19 opening to the lower surface at a position rearward from the support shaft 18. Furthermore, a protrusion 20 is provided at the front end of the lower surface of the mounting leg 17. A nearly rigid clip 22 with a push plate 21 protruding from the upper end of the rear end surface of the mounting leg 17 is integrally formed of resin, and the mounting leg 17 of the clip 22 is inserted into the groove 9 of the knob body 12. The support shaft 18 is housed in the knock body 1.
2 is rotatably fitted into the support hole 10 by elastic deformation of the groove 9, and the protrusion 20 is brought into contact with the bottom surface of the groove 9. Further, a coil spring 23 is inserted into the hole 19, and the lower end of the coil spring 23 is inserted into the groove. 9 so that the clip 22 and the knob body 12 collide with the bottom surface of the
A coil spring 24 is attached to the outer periphery of the small diameter portion of the front end of the writing body 7, and the rear end of the writing body 7 is housed in the cylindrical portion 8 of the knob body 2. The coil spring 24 is inserted into the inside of the shaft cylinder from the rear end opening, and the front end of the coil spring 24 is brought into contact with the inner surface step 25 of the shaft cylinder 6, and the projection 11 of the knob body 12 is caused to ride over the projection 5 of the shaft cylinder 6 by elastic deformation. Then, the upper end of the mounting leg 17 of the clip 22 is fitted into the slit 1 of the barrel 6, and the knob body 12 is advanced so that the ball 13 of the clip 22 fits into the recess 3 of the barrel 6. When the rib 15 is inserted into the groove 4 by the spring force of the coil spring 23 and the locking step portions 2 and 16 are engaged with each other, the tip portion 26 of the writing body 7 is removed from the shaft tip opening 27. As the clip 22 protrudes (see FIG. 2), the push plate portion 21 at the rear end of the clip 22 is pressed against the coil spring 2.
3 is compressed and the ball portion 13 at the front end is lifted to release the engaged state of the locking step portions 2 and 16, and the writing body 7 and the knob body 12 are pressed together by the restoring force of the coil spring 24. Protrusion 1 of body 12
1 retreats to the position where it locks with the protrusion 5 of the barrel barrel 6, so that the brush tip 26 is recessed into the interior of the barrel (the first
(See figure) The length of the cursive font 7 is set appropriately.

In the above-mentioned embodiment, the slit 1 is provided in the barrel 6, and the mounting leg 17 of the clip 22 is inserted into the slit 1.
By fitting the clip 22 and making it unrotatable, displacement of the position of the locking step 16 of the clip 22 and the locking step 2 of the barrel 6 in the circumferential direction is prevented, but the slit 1 is provided in the barrel 6. It is also possible to provide an embodiment in which the fitting portion between the barrel 6 and the knob body 12 has a rotation-preventing shape, for example, with a polygonal cross section. In that case, the mounting leg portion 17 of the clip 22 may be in a state of protruding rearward from the rear end of the shaft tube 6. Further, it is also possible to form something like a guide rail between the locking step 16 of the ball portion 13 of the clip 22 and the locking step 2 of the barrel 6 to prevent the positional shift.
Further, in the embodiment described above, the locking step 2 of the barrel 6 is provided in the recess 3, but it may also be provided as a projection on the barrel 6.

(Operations and Effects) The present invention is as described above, and first, at a position where the knob body is advanced until the tip of the cursive pen protrudes from the shaft tip opening, the locking part of the clip and the engagement provided on the side surface of the shaft cylinder are connected. Since it engages with the stop part, it prevents the clip from being inserted into a clothes pocket, etc. while the tip of the cursive writing brush remains protruding from the tip of the shaft, thereby preventing staining of the clothes pocket, etc. by the tip of the brush. be able to. Next, by fitting the spindle provided on the mounting leg of the clip into the support hole provided in the groove of the knob body, the clip was rotatably attached to the knob body, so the movement of the clip was smooth. The clip will not break due to fatigue, and the risk of the clip coming off as in the case of locking the clip is also reduced. Furthermore, since the spring is interposed between the clip and the knob body, the knob body, spring, and clip can be assembled outside the barrel, making the assembly work extremely easy.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the brush tip in a retracted state, Fig. 2 is a longitudinal cross-sectional view of the brush tip in a protruding state, and Fig. 3 is a position taken along line A-A in Fig. 1. FIG. 4 is a cross-sectional view of only the barrel taken along line B--B in FIG. 1, and FIG. 5 is a plan view of the inner surface of the front end of the clip. 1... Slit, 2... Locking step, 3... Recess, 4... Groove, 5... Protrusion, 6... Shaft cylinder, 7...
... Cursive, 8 ... Cylinder, 9 ... Groove, 10 ... Support hole, 11 ... Protrusion, 12 ... Notch, 13 ...
Ball part, 14... Notch part, 15... Rib, 16...
Locking step portion, 17... Mounting leg portion, 18... Support shaft, 1
9... Hole, 20... Protrusion, 21... Push plate part, 22
...Clip, 23...Coil spring, 24
... Coil spring, 25 ... Inner step, 26
...Brush tip, 27...Shaft tip opening.

Claims (1)

[Scope of utility model registration request] A locking part is provided at the front end of the clip, a pressing part and a mounting leg are provided at the rear end, a support shaft is provided protruding from both sides of the mounting leg, and a groove is formed in the knob body to open on one side. A pair of support holes are provided at opposing locations on the side walls on both sides of the groove, and the clip mounting leg is accommodated in the groove of the knob body, and the support shaft is rotatably fitted into the support hole. Both front and rear ends are made swingable, and a spring that springs the front end of the clip in the direction of the shaft cylinder is interposed between the mounting leg of the clip and the inner surface of the groove of the knob body, so that the tip of the writing brush is 1. A knob-type writing instrument, characterized in that a locking part is provided on the side surface of the shaft cylinder, and the locking part engages with the locking part of the clip at the position where the knob body is advanced until it protrudes from the tip opening.