JPH0453987Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a notch type writing instrument.

(Prior art) Conventionally, Utility Model Application Publication No. 168987/1983 and Utility Model Application Publication No. 1987-
As shown in Publication No. 75092, when the writing part protrudes from the tip of the barrel, it is impossible to insert it into a pocket, etc., and after it is inserted into a pocket, etc., even if an external force is unexpectedly applied to the knob body. 2. Description of the Related Art Knock-type writing implements are known that prevent the writing part from protruding from the tip of the barrel, thereby preventing the writing part from staining a pocket or the like.

However, as in the former known example, an operating body is provided that penetrates the clip, and the operating body is provided with a push button or the like for disengaging the engagement between the clip ball and the locking protrusion of the locking tube. If you do this,
There is a disadvantage that the structure becomes complicated and the cost increases.

In addition, as in the latter known example, an elongated hole is provided on the side of the shaft cylinder facing the clip, and the engaging part that interlocks with the pusher protrudes from the window hole so that it can be freely engaged with and detached from the locking hole at the tip of the clip. , Since the engaging part and the safety piece must move within the range from the tip of the clip to the clip mounting leg, there is a design disadvantage in that the locking stroke becomes excessive. arise. And if you try to keep the stroke to an appropriate length,
The disadvantage is that the clip becomes short and the clip function and appearance are impaired. In addition, the safety piece needs to protrude so far that its tip almost comes into contact with the inner surface of the clip for its function, so when the safety piece is used as an engaging part to engage and disengage at the tip of the clip, the tip of the clip must be largely displaced outward. However, there is a problem in that the operability is poor.

(Problems to be Solved by the Invention) Therefore, the present invention prevents the use of the clip with the writing part protruding from the tip of the shaft and prevents it from being inserted into a pocket, etc., and also enables the use of the clip so that it can be inserted into a pocket, etc. When it is possible to insert the writing part into the shaft, the writing part is automatically recessed into the shaft, and even if an external force is unexpectedly applied to the knob body after insertion into a pocket etc., the writing part's shaft tip opening It is possible to prevent the writing part from protruding from the pocket, completely prevent the writing part from staining the pocket, etc. Moreover, the structure does not become complicated, the knock stroke of the knock body does not become excessive, and the tip of the clip To provide a knob-type writing instrument whose knob body can be easily locked and released.

(Means for Solving the Problems) In order to achieve the above object, the knock-type writing instrument of the present invention is provided with a locking portion at the tip of the clip and a locking portion on the knob body so that the writing portion is at the tip of the shaft. In a knock-type writing instrument, in which the above-mentioned locking parts engage with each other while protruding from the end opening, and when this engagement is released, the writing part is retracted into the shaft by a spring, the tip of the clip is held horizontally. The shaft cylinder has a slit on the side facing the clip, and a mounting leg with grooves connected to both sides of the slit and communicating with the slit. A window hole is provided in front of the slit in a position opposite to the locking part of the clip, and the knob body is movable by penetrating into the locking part with a protrusion on its side and the slit. Each stopper piece is integrally provided,
The upper end of the stopper piece is constructed so as to substantially abut against the inner surface of the clip.

(Embodiment) In the illustrated embodiment, the front end and the rear end are opened, and an axial slit 1 is provided on a part of the circumference of the side surface from the rear end edge to a required distance forward position, and the slit 1 is provided on the extension line of the slit 1. A shaft cylinder 3 having a window hole 2 of a required length in the axial direction at a position further forward by a required distance;
It has a ball part 4 which is elastically displaceable in the lateral direction at a position facing the window hole 2, a locking step part 5 is provided on the ball part 4, and an axial groove 6 is provided in the center of the rear end part. Provide the shaft cylinder 3
A clip 8 having mounting legs 7 connected to both sides of the slit 1 on the side surface of the rear end is integrally molded with resin, and the front end is open and a U-shaped slit is provided on the side surface near the front end. The area surrounded by is an elastic piece part 9, and a locking protrusion 10 is provided protruding from the rear end of the elastic piece part 9, and a stopper is provided at a position separated by a required distance on the rear extension line of the locking protrusion 10. Piece 1
The tube body 15 is made of resin and can be easily elastically deformed. A ballpoint pen refill 16 is formed, and the refill 16 is attached to a small diameter cylindrical portion 17 at the front end.
With the coil spring 18 fitted on the outer periphery of the cylinder, the coil spring 18 is inserted into the shaft cylinder 3 from the rear end opening of the cylinder, and the front end of the coil spring 18 is brought into contact with the inner step 19 of the front end of the cylinder. Furthermore, the knock body 12 is inserted into the barrel from the rear end opening of the barrel 3, and the rear end of the re-feel 16 is inserted into the inner hole of the knob body 12, and the knob body 12, the re-feel 16, and the barrel are inserted. 3, the locking protrusion 10 of the knock body 12 is fitted into the window hole 2 of the barrel 3, and the stopper piece 11 of the knob body 12 is inserted into the slit 1 of the barrel 3.
The rear end of the knob body 12, which protrudes somewhat from the rear end opening of the shaft cylinder 3, is pressed forward, and the locking protrusion 10 of the knob body 12 pushes up the ball part 4 of the clip 8, pushing the ball part 4 of the clip 8 forward. When the writing part 13 of the re-feel 16 protrudes from the shaft tip opening 20 when the reel 16 moves to a state where it is engaged with the locking stepped part 5 (see Fig. 1).
At the same time, the distal end of the clip 8 is elastically displaced slightly in the lateral direction to release the engagement between the locking step portion 5 and the locking protrusion 10, and the coil spring 18 moves the reel 16 and the knock body 12 to the locking protrusion 10. The dimensions of each part are appropriately set so that the front writing part 18 of the re-feel 16 is recessed into the inside of the shaft when it is retracted until it abuts against the rear edge of the window hole 2.

In the above embodiment, if the tube body 15 of the re-feel 16 is made of metal or the like and is nearly rigid, or if the tube body 15 of the re-feel 16 is
If the gap between the inner diameter of the knob body 12 and the outer diameter of the reel 16 is extremely small, or the gap between the inner diameter of the knob body 12 and the outer diameter of the re-feel 16 is extremely small, the locking protrusion 10 of the knob body 12 is moved into the shaft cylinder by elastic deformation. 3 is difficult to fit into the window hole 2 of 3, for example, a structure may be adopted in which a removable cap or the like is attached to the front end of the shaft tube 3, and the cap or the like is removed and the re-feel 16 is inserted from the front. By opening the rear end of the body 12, fitting the tail plug, and removing the tail plug, the re-feel 16 is created.
It is also possible to have a structure in which .

Further, in the above embodiment, a side wall 2 is provided on one side of the locking stepped portion 5 of the ball portion 4 of the clip 8 in the lateral direction.
1 existed, and the tip of the clip 8 could only be elastically displaced in one direction in the lateral direction, but if this side wall 21 was removed, it would be possible to elastically displace it to either the left or right, making it more convenient. Become.

(Operations and Effects) The structure of the present invention is as described above, and when the writing part is protruded from the shaft tip opening, the locking part at the tip of the clip and the locking part of the knob body engage, preventing the clip from being used. This prevents the clip from being inserted into a pocket, etc., and when the clip can be used by releasing the engagement between the locking part at the tip of the clip and the locking part of the knob body, the writing section is secured by the force of the spring. The writing part can be inserted into the shaft, and even if an external force is unexpectedly applied to the knock body after insertion into a pocket, etc., the stopper piece prevents the knock body from moving forward and prevents the writing part from protruding from the shaft tip opening. This has the effect of completely preventing staining of clothing pockets and the like by ink from the writing section.

In addition to this, the present invention does not have the disadvantage of complicating the structure as in the former of the above-mentioned known examples, and also, since the locking part and the stopper piece are separately provided on the knock body, the above-mentioned known example does not have the disadvantage of complicating the structure. Since there is no need for the locking part to play the role of a stopper piece as in the latter case, the locking part and the stopper piece only need to be able to move by the required amount, and there is no need to increase the knock stroke of the knock body. Therefore, there is no problem in that the clip is shortened or shortened in order to suppress the knock stroke to an appropriate length, thereby impairing the clip function or appearance. Furthermore, by providing the locking part and the stopper piece separately, the locking part does not have to play the role of a stopper piece, and it does not need to protrude so much that it almost touches the inner surface of the clip, so the tip of the clip can be slightly bent. It is possible to engage and disengage the locking part at the tip of the clip and the locking part of the knob body by simply displacing the clip, which eliminates the poor operability as in the latter known example. It has exceptional effects such as improved performance.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a longitudinal cross-sectional view of the writing part in a protruding state, Figure 2 is a longitudinal cross-sectional view of the writing part in a retracted state, and Figure 3 is a perspective view of the tip of the clip. It is. 1...Slit, 2...Window hole, 3...Shaft tube, 4
...Ball part, 5...Locking step part, 6...Groove, 7...Mounting leg part, 8...Clip, 9...Elastic piece part, 10
... Locking protrusion, 11 ... Stopper piece, 12 ...
Notch typeface, 13... writing part, 14... outer stepped part,
15...Tube body, 16...Ballpoint pen refill, 17...Front end small diameter portion, 18...Coil spring, 19...Inner surface stepped portion, 20...Shaft tip opening, 21...Side wall.

Claims (1)

[Scope of utility model registration request] A locking portion is provided at the tip of the clip, and a locking portion is also provided on the knob body, so that when the writing portion protrudes from the shaft tip opening, the locking portions engage with each other, and when this engagement is released, a spring is released. In the knob-type writing instrument, in which the writing part is recessed into the shaft, the distal end of the clip can be elastically displaced laterally by a distance sufficient to release the engagement, and there is a shaft in the barrel that faces the clip. A clip is integrally provided with a slit on the side surface and a mounting leg portion having grooves connected to both sides of the slit and communicating with the slit, and a window is provided in front of the slit at a position opposite to the locking part of the clip. A hole is provided, and the knock body is integrally provided with a locking part having a protrusion on its side surface and a movable stopper piece that protrudes into the slit, so that the upper end of the stopper piece substantially abuts the inner surface of the clip. A constructed notsuku type writing instrument.