JP3041015U - Push-out writing instrument - Google Patents

Abstract

(57) [Abstract] [Problem] To improve operability during centering. SOLUTION: When the pusher 11 tilts, the pusher 11 pushes the pusher receiver 4
The pushed-down inclined surface 14 of the protrusion 4a provided on the lower side is pushed down to increase the movement stroke of the pusher receiver 4.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 According to the present invention, the push rod protruding outward from the operation hole of the shaft cylinder is linearly or tilted to move the pusher receiver in the shaft cylinder downward by the pusher integrally or integrally provided with the push rod. The present invention relates to an extrudable writing instrument for ejecting.

[0002]

[Prior art]

 Conventionally, an extruding writing instrument of this type has a structure shown in FIG. 6 (Japanese Utility Model Publication No. 7-55115). In this prior art, a hemispherical pusher 11 is inserted from an operation hole 13 opened at the base end of the shaft cylinder 3, and an engaging flange portion 21 is formed on the lower surface of the pusher 11 so as to project in a protruding shape. A pusher holder that is configured to engage with the hole edge 13a of 13 and that is downwardly moved by linearly moving or tilting the push rod 31 that is integral with the pusher 11 projecting outward from the operation hole 13 By lowering the tube cap 6 located below the play space 5 by 4 and lowering the play space 5 minutes or more, the chuck 7 provided at the lower end of the core case 2 below the tube cap 6 is removed from the tightening ring 8. The core 100 is pushed out by detaching it.

[0003]

[Problems to be solved by the device]

 By the way, in the prior art, the engaging flange portion 21 of the pusher 11 pushes the horizontal upper surface b3 of the pusher receiver 4 when tilting. In such a system, only the amount of rotation of the pusher 11 that tilts about the fulcrum is converted into the stroke required for centering, so the push bar 31 protruding from the operation hole 13 must be tilted relatively large to achieve the centering. It is a mechanism that is not issued. Therefore, there is a problem that it is not possible to provide gentle operability that allows even a small finger, such as a child, to easily operate. Further, when the predetermined stroke required for centering the pusher receiver 4 is obtained, the diameter of the engaging collar portion 21 naturally increases, which causes the diameter of the shaft cylinder 3 to increase and the writing instrument itself to increase in size. There was also a problem that the fit was poor and it was difficult to handle.

The present invention has been made in view of the above conventional circumstances, and an object of the present invention is to provide an extruding writing instrument which has excellent operability at the time of centering and can be downsized.

[0005]

[Means for Solving the Problems]

 The technical means taken to achieve the above-mentioned object is an extrusion type in which the pusher whose peripheral edge engages with the operation hole hole edge of the shaft cylinder is moved linearly or tilted to move the pusher receiver downward and center it. In the writing instrument, a protrusion having a recessed portion formed on the lower surface of the pusher and an inclined surface provided on the upper surface of the pusher receiver and accommodated in the recessed portion so as to be engaged therewith and pushed down by the pusher when tilting. And a bottom portion of the pusher having a recess and the top surface of the pusher receiver having a protrusion form abutting portions of the pusher and the pusher receiver. To do. Further, the protrusion according to claim 1 has a truncated cone shape or a hemispherical shape, and the recess has a surface that engages with the protrusion.

(Operation) When the pusher tilts, the push-out writing instrument pushes down the pushed inclined surface of the protrusion provided on the pusher receiver, and the pusher receiver is about the height of the protrusion as compared with the conventional case. Increase the moving stroke of. Therefore, it is possible to perform centering with a small tilt movement of the pusher. Further, as a result of the movement stroke of the pusher receiver becoming large, it is possible to reduce the diameter of the pusher and the diameter of the shaft cylinder that accommodates it when obtaining the predetermined movement stroke required for centering the pusher receiver.

[0007]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 5 show an extrusion type writing instrument of the present embodiment, in which A is an extrusion type writing instrument, 1 is an operating portion, and 4 is a pusher receiver.

This push-type writing instrument A has a hemispherical pusher 11 which constitutes one half of the operating portion 1 from an operating hole 13 opened at the base end of the shaft tube 3 in the same manner as in the above-mentioned prior art. When it is inserted, the engaging brim portion 21 that is circumferentially provided on the lower surface of the pusher 11 is joined (engaged) with the hole edge 13a of the operation hole 13, and the other half of the operation portion 1 is inserted. The tube cap 6 is arranged below the pusher receiver 4 which moves downward by moving the push rod 31 protruding outward from the operation hole 13 by linear movement or tilting, through the play space 5. At the time of centering, when the pusher receiver 4 moves down more than the allowance (play motion) of the play space 5 and lowers the tube cap 6, the chuck at the lower end of the core case 2 provided under the tube cap 6 is lowered. The hook 7 is detached from the tightening ring 8 to push out the lead 100. Reference numeral 10 is a spring for cushioning writing pressure.

As described above, the operation portion 1 includes a hemispherical pusher 11, an engaging collar portion 21 provided around the periphery of the pusher 11, and a push rod 31 connected to the apex of the pusher 11. And a recess 11a is provided in the center of the lower surface of the pusher 11.

The operation portion 1 is interposed between the pusher receiver 4 and the tube cap 6 in a state where the push rod 31 is protruded to the outside from the operation hole 13 opened at the base end of the shaft tube 3. The push collar 9 is clamped by the upper surface of the pusher receiver 4 and the edge of the operation hole 13 (specifically, the inner edge) 13a by receiving the elastic force of the pushed spring 9. 11 is seated on the upper surface of the pusher receiver 4.

The pusher receiver 4 has, on its upper surface, a protrusion 4a having a truncated cone shape or a hemispherical shape having a depressed surface 14 as a constituent surface and a height of about 2 mm to 3 mm, which is integrally or integrally provided. .

The concave portion 11a has a truncated cone shape or a hemispherical shape for accommodating (more specifically, surface engaging) the protruding portion 4a, and has a lower surface b1 of the pusher 11 having the concave portion 11a. The upper surface b2 of the pusher receiver 4 having the protrusion 4a constitutes an abutting portion B between the pusher 11 and the pusher receiver 4 when the push rod is tilted (see FIG. 4 in particular).

The abutting portion B can increase the movement stroke of the pusher receiver 4 when the push rod is tilted. Details will be described later.

The push-type writing instrument configured as described above is in the state of FIG. 1 when not in use, and the chuck 7 that pushes out the core 100 is gripping the core 100 without separating from the tightening ring 8.

From this state, the push rod 31 is tilted in an arbitrary direction (any direction of 360 degrees is possible) against the elastic force of the push spring 9. Then, the pusher 11 starts to tilt with the engaging collar portion 21 portion on the opposite side to the tilting direction as a fulcrum, and the pusher receiver 4 starts to be pushed down, and the engaging collar portion 21 portion positioned in the tilting direction is pressed. Immediately before pushing down the inclined surface 14, the pusher receiver 4 is pushed (downward) until the play space 5 is eliminated (initial tilt) (see FIG. 2). Further tilting of the push rod 31 pushes down the protrusion 4a so that the lower surface of the engaging collar 21 rides on the pushed inclined surface 14 and is converted into a large pushing amount (falling amount) (centering tilting). The centering tilt moves the tube cap 6 downward, lowers the chuck 7 at the lower end of the core case 2 provided at the lower portion of the tube cap 6, separates it from the tightening ring 8, and pushes out the core 100 (Fig. 3). reference). The operation hole 13 has a predetermined hole diameter that does not reach the apex of the protrusion 4a at the engaging flange portion 21 positioned in the tilting direction when centered (see FIG. 3). The case of centering is shown. By the way, the tilting operation of the push rod 31 is not performed in consideration of the initial tilting and the centering tilting, but when pushing out the core 100 by making the diameters of the prior art pusher and the pusher 11 the same. In the present embodiment, when the pusher receiver 4 is pushed by a necessary amount, the tilt angle of the push rod 31 can be reduced by about 20 degrees as compared with the prior art.

Although it has not been proved in an experiment, when the pushing movement (downward movement) of the pusher receiver 4 required for centering is performed at the same tilting angle of the push rod 31 as in the prior art, the shaft cylinder 3 has a small diameter. It is understandable that it is possible to achieve this after being realized.

[0017]

[Effect of the invention]

 As described above, the present invention is provided with a recess formed in the lower surface of the pusher and an inclined surface which is provided on the upper surface of the pusher receiver and is accommodated in the recess so as to be pushed down by the pusher when tilting. A push-out writing instrument in which the lower surface of the pusher having a recess and the upper surface of the pusher receiver having the projection constitute an abutting portion of the pusher and the pusher receiver. Therefore, the height of the protrusion and the movement stroke of the pusher receiver are increased. Therefore, the pusher can be centered with a small tilting movement, and it is possible to provide an extrudable writing instrument with good operability that can be easily operated by a target person such as a child whose fingers are small without making any work. Also, as a result of the larger stroke of movement of the pusher receiver, it is possible to reduce the diameter of the pusher and the shaft cylinder that accommodates it when obtaining the predetermined stroke of the pusher receiver required for centering, which is easy to handle. It is possible to provide an extrudable writing instrument with a very good grip (fitness).

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an extrusion-type writing instrument according to the present embodiment, in which an intermediate illustration is omitted. .

FIG. 2 is a cross-sectional view of the above-mentioned push-out writing instrument at the time of initial tilting, which is omitted from the middle.

FIG. 3 is a cross-sectional view of the push-out type writing instrument at the time of centering and tilting described above, in which an intermediate illustration is omitted.

FIG. 4 is an exploded perspective view of a main part.

FIG. 5 is a cross-sectional view of an extrusion-type writing instrument in which the pusher is linearly moved to perform centering, and is omitted from the middle.

FIG. 6 is a cross-sectional view of a conventional extrusion-type writing instrument, in which the intermediate is omitted.

[Explanation of symbols]

A: Push-out writing instrument 3: Shaft cylinder 11: Pusher 11a: Recessed portion 14: Depressed inclined surface 4a: Projection B: Abutment portion 21: Engagement flange portion b1: Lower surface (presser) b2: Upper surface (presser) Receiving) 31: Push rod

Claims (2)

[Utility model registration claims] 1. An extrusion-type writing instrument in which a pusher whose peripheral edge is fitted to an operation hole hole edge of a shaft cylinder is linearly or tilted to move a pusher receiver downward to perform centering, and a recess is provided on a lower surface of the pusher. And a projection having an inclined surface to be pushed down which is provided on the upper surface of the pusher receiver and is engaged with the depression and is pushed down by the pusher when tilting. An extrusion-type writing instrument characterized in that the lower surface and the upper surface of a pusher receiver having a projection form abutting portions of the pusher and the pusher receiver. 2. The extrusion-type writing instrument according to claim 1, wherein the projection has a truncated cone shape or a hemispherical shape, and the recess has a surface which engages with the projection. .