JPH0443351Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a knock-type writing instrument having a structure in which the tip of the brush is moved in and out of the tip of the barrel by operating the knob.

(Problems to be solved by conventional technology and inventions) Knot-type writing instruments have a problem in that when an external force is accidentally applied to the knot body after inserting it into a pocket of clothing, the tip of the brush inadvertently slips out of the tip of the barrel. The protrusion caused problems such as staining clothes or damaging fabrics due to the ink attached to the tip of the brush. In order to solve this problem, various types of locking devices are installed inside the shaft cylinder to prevent the knock body from moving forward after being inserted into the pocket.
There is one described in Publication No. 162288. However, in this conventional example, the safety piece disposed on the inner surface of the clip in conjunction with the pusher to be clicked comes into contact with the edge of the pocket to prevent the pusher from moving forward. Because it is made of soft fabric, even if the safety piece collides with the edge of the pocket, if the external force applied to the pusher is large, it will not be possible to prevent the safety piece from moving forward, that is, the pusher will knock, and the edge of the pocket will not reach the depth where it collides with the safety piece. There are problems such as the safety piece not functioning if it is inserted shallowly. The present invention aims to solve this problem.

(Means for Solving the Problems) The knot-type writing instrument of the present invention devised to solve the above problems has a clip attached to the outer surface of the barrel, and a clip attached to the side surface of the barrel near the front end of the clip. A through hole is provided at opposing positions, and the elastic piece has an elastic piece that can freely swing in the inward and outward directions, and a pressing convex part is provided on the outer surface of the front end of the elastic piece, and a hook part is provided on the inner surface of the front end. A locking body having a locking protrusion formed on the outer surface of the approximately central part of the clip is fixed inside the barrel with the pressing protrusion facing the front end of the clip, and the elastic piece is The pressing convex part of the clip protrudes from the through hole of the shaft cylinder and comes into contact with the inner surface of the clip, and separately, a guide hole is provided on the side surface of the front end and is locked at the rear position of the guide hole. A knob body having a hole and a hook part protruding inward on the side facing the guide hole is slidably mounted inside the shaft cylinder, and when the knob body is in the forward state, the protrusion for pressing the locking body is formed. part is located in the guide hole, and the locking convex part is located in the locking hole,
The dimensions are set so that when the knob body is in the retracted state, both the pressing protrusion and the locking protrusion of the locking body are located in the guide hole, and the hook part of the locking body is positioned corresponding to the hook part of the knob body. When a piece of cloth from a pocket of clothing is inserted between the clip and the side of the shaft cylinder, the pressing convex part is pressed inward and the elastic piece swings inward to release the hook part of the locking body. This device is characterized in that the knob body can be engaged with the hook portion of the knob body, but cannot move forward.

(Example) An illustrated example of the present invention will be described in detail below. First, a ballpoint pen refill 2 is housed inside the barrel 1, and a knob body 3 is arranged so as to be in contact with the rear end of the ballpoint pen refill 2. The ballpoint pen refill 2 and the knob body 3 protrude outward from the end opening, and are pressed rearward by a return spring 4. A clip 5 is attached to the outer surface of the barrel 1, and a through hole 6 is provided in the side surface of the barrel opposite the front end of the clip 5. The knob body 3 is hollow inside and has a guide hole 7 at the front end of the side surface, a locking hole 8 at the rear thereof, and a hook portion 9 projecting inward at the side surface opposite the guide hole 7.
are respectively provided, and a notch 10 is present at the rear of the hook portion 9. A locking body 11 is disposed inside the hollow part of the knob body 3. The locking body 11 has an elastic piece 12 on one side and a support piece 13 on the other side.
The elastic piece part 12 and the support piece part 13 are integrally continuous at the rear end, and the support piece part 13 is fixed to the side surface of the shaft cylinder 1 at the position of the notch part 10 of the knob body 3. . The elastic piece 12 is swingable in the inward and outward directions, and has a pressing protrusion 14 on the outer surface of its front end, a hook portion 15 on the inner surface of the front end, and a locking protrusion 16 on the outer surface of the approximately central portion. are doing. The pressing convex part 14 of the elastic piece part 12 is always in a position where it passes through the guide hole 7 of the knock body 3 and fits into the through hole 6 of the shaft cylinder 1, and in the normal state where no external force is applied, the pressing convex part 14 is It protrudes from the through hole 6 and its upper surface abuts the inner surface of the clip 5. The locking protrusion 16 of the elastic piece 12 is positioned within the guide hole 7 of the knob body 3 when the knob body 3 is retracted and the tip of the ballpoint refill 2 is recessed into the barrel. However, when the knob body 3 moves forward and the brush tip protrudes, it is set at a position where it engages with the locking hole 8 of the knob body 3. Also, notch type 3
The position of the hook portion 9 is located forward of the hook portion 15 of the locking body 11 when the knob body 3 is in the forward state, and is located forward of the hook portion 15 of the locking body 11 when the knob body 3 is in the backward state. It is set in a position where it can be engaged immediately.

(Function) Based on the above embodiment, the function will be explained below with reference to the drawings. First, FIG. 1 shows the state during writing, in which the knock body 3 is knocked and moves forward, the ballpoint refill 2 is pressed and the tip of the pen protrudes, and the locking protrusion 16 of the locking body 11 is inserted into the locking hole. 8 to prevent the knock body 3 from retreating, the pressing convex portion 14 extends through the guide hole 7 and the through hole 6 and comes into contact with the inner surface of the clip. Next, FIG. 2 shows the state when not writing, and by pressing the front end of the clip 5 in the direction of the arrow in FIG. The locking convex portion 16 is pulled out from the locking hole 8, the locked state is released, and the knock body 3 is moved back by the return spring 4. Next, FIG. 3 shows the state in which it is inserted into a pocket. A cloth A is inserted between the clip 5 and the barrel 1, and the pressing convex part 14 of the locking body 11 is pushed inside by this cloth A. The hook portion 15 is engaged with the hook portion 9 of the knob body 3 by being pushed toward the side. Therefore, it is impossible for the knocking body 3 to knock in this state.

(Effects of the invention) The structure and operation of the invention are as described above.
After inserting into a pocket, etc., the locking body always prevents the knob from moving forward, so even if an unexpected external force is applied to the knob, the tip of the brush will not protrude, preventing stains or damage to clothes. effective. However, since the hook part of the knock body and the hook part of the locking body are engaged with each other, the forward movement of the knock body is reliably prevented regardless of the magnitude of the external force. In addition, the pressing convex part that operates the hook part of the locking body is arranged in a position facing the front end of the clip, so that even if the fabric of the pocket is only shallowly inserted into the inner surface of the clip, the locking part of the locking body will be blocked. There is an advantage that The present invention has the effect of preventing the tip of the brush from staining or damaging clothing not only after it is inserted into a pocket, but also during insertion. In other words, even if you try to insert the brush tip into your pocket with the tip protruding, the pressing protrusion is in contact with the clip, so you have to retract the pressing protrusion, and when you do this, the elastic piece bends and locks. This is because the ballpoint pen refill is automatically moved back by the force of the return spring when the ballpoint protrusion also disengages from the locking hole.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view in a writing state, Fig. 2 is a longitudinal cross-sectional view in a non-writing state, and Fig. 3 is a longitudinal cross-sectional view in a state in which it is inserted into a pocket. 4 is a perspective view of the locking body, FIG. 5 is a perspective view of the knob body, and FIG. 6 is a half-cut perspective view of the knob body. 1... barrel, 2... ballpoint refill, 3
...Notch type, 4...Return spring, 5...
...Clip, 6...Through hole, 7...Guide hole, 8...
...Latching hole, 9...Hook part, 10...Notch part, 1
DESCRIPTION OF SYMBOLS 1... Locking body, 12... Elastic piece part, 13... Support piece part, 14... Pressing convex part, 15... Hook part,
16...Locking protrusion, A...Fabric.

Claims (1)

[Scope of utility model registration request] A clip is attached to the outer surface of the barrel, a through hole is provided on the side surface of the barrel at a position opposite to the front end of the clip, and an elastic piece that is swingable in the inward and outward directions is attached to the front end of the elastic piece. The locking body has a pressing protrusion on the outer surface, a hook portion on the inner surface of the front end, and a locking protrusion on the outer surface of the approximately central part of the elastic piece.The pressing protrusion is located at the front end of the clip. It is fixed inside the barrel so as to face the neighboring part, and the pressing convex part of the elastic piece protrudes through the through hole of the barrel and comes into contact with the inner surface of the clip. Separately from this, a guide hole is formed on the side surface of the front end, a locking hole is formed behind the guide hole, and a hook portion protruding inward is formed on the side surface facing the guide hole. When the knock body is in the forward position, the pressing convex part of the locking body is located in the guide hole, and the locking convex part is located in the locking hole. The dimensions are set so that both the pressing convex part and the locking convex part are located in the guide hole, and the hook part of the locking body is located corresponding to the hook part of the knob body, and there is a space between the clip and the side surface of the shaft cylinder. When a cloth, etc. from a clothing pocket is inserted, the pressing convex part is pressed inward and the elastic piece swings inward, allowing the hook part of the locking body to engage with the hook part of the knob body. A notsuku type writing instrument characterized by having a notsuku type that cannot move forward.