JPH072233Y2 - Knock type writing instrument - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a knock-type writing instrument having a lot of interest.

[Prior art and its problems]

The knock-type writing instrument has a retractable mechanism consisting of a cam, a rotor, a knock rod, etc. inside the barrel and a refill such as a ballpoint pen.When the knock rod protruding from the rear end of the barrel is knocked, the rotor moves back and forth along the cam. In many cases, the pen body of the refill comes out from the tip of the barrel. In other words, with the knocking operation, the pressure is mechanically transmitted to the refill to move forward. It unconsciously senses that the pressure transmitting parts are moving within the barrel.

By the way, in addition to the original writing function, writing instruments are sometimes required to be fun and entertaining and entertaining. As a method of enriching writing instruments, it is possible to move parts related to the writing function or parts not related to the writing function by some mechanism, and to give the composition a change that changes before or after the movement process. Is well known. On the other hand, it is very interesting to see moving parts appear to be stationary, but such a method is mechanically difficult and has not been practically used.

[Purpose of device]

Therefore, the present invention illusions that when the knocking operation is performed, it is divided at the intermediate part of the barrel and the pressing force by the knock is not transmitted to the pen body, and nevertheless the pen body appears and disappears from the tip of the barrel. The purpose of the present invention is to provide a knock-type writing instrument that is extremely entertaining.

[Constitution of the device and its action]

The structure of the present invention is a knock-type writing instrument in which a retracting mechanism and a refill are built in the shaft cylinder, and when a knock rod protruding from the rear end of the shaft cylinder is knocked, the pen body of the refill protrudes from the tip opening of the shaft cylinder. The cylinder consists of a rear shaft with a built-in retracting mechanism and a front shaft that houses the refill.The opposing rear shaft and the vicinity of the front shaft are connected by multiple thin pipes, and a push rod is inserted in this pipe. Is inserted, and the push rod moves by knocking operation so that the pen body appears and disappears.

That is, since the rear shaft having the retractable mechanism built therein and the front shaft containing the refill are connected by a thin pipe, it looks like the shaft cylinder is completely divided into two. Then, when a knocking operation is performed, the push rod inserted in the pipe moves and the pen body is projected and retracted, but since the pipe is thin and it is connected in the vicinity of the periphery avoiding the center, the pipe is apparently just a connecting rod. It does not seem that the push rod is moving inside the pipe. Therefore, it seems that the front shaft and the rear shaft are completely separated and are simply connected by the connecting rod, and even if the straw pushes the knock rod protruding from the rear end of the rear shaft, the pen body comes out from the front end opening of the front shaft. Since it appears and disappears, it is a magical fun knockdown writing instrument.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

The drawing shows a knock type ballpoint pen. In FIG.
The barrel is made of opaque synthetic resin and has a rear shaft 11 and a front shaft 12.
The front shaft 12 has a front opening 15 attached to the front end thereof. The rear shaft 11 and the front shaft 12 are, as shown in FIG.
It is connected by four thin and highly rigid pipes 13.
The number of pipes 13 is not limited to four, but the rear shaft 11 and the front shaft 12 are connected to each other on the same circumference in the peripheral part while avoiding the central part, and in appearance, they are divided into upper and lower parts in the middle part. The shaft cylinders are only connected by a thin connecting rod, and the upper and lower shaft cylinders appear to be mechanically unrelated. The pipe 13 is fixed and reinforced by a donut-shaped fixing piece 14. Further, the rear shaft 11 and the front shaft 12 are composed of a plurality of parts, but are functionally each one cylindrical body.

Inside the rear shaft 11, as shown in FIG. 1, a cam 31 and a rotor 3 are provided.
2. A well-known rotary knock type retracting mechanism including a knock rod 33 and a knock cover 34 is built in. That is, cam 31
Is formed by alternately forming three deep cam grooves and shallow cam grooves in the axial direction at equal intervals, and the tip is inclined in a sawtooth shape. On the outer periphery of the front end portion of the knock rod 33, six pressing protrusions 33a having inclined ends are formed, and the pressing protrusions 33a are fitted in the deep cam groove and the shallow cam groove of the cam 31, respectively. Then, a knock cover 34 is fitted to the rear end of the knock rod 33 and projects from the rear end opening of the rear shaft 11. Next, three protrusions 32a whose rear end faces are inclined are formed on the outer periphery of the tip end portion of the rotor 32, and these protrusions 32a are fitted into the deep cam grooves of the cam 31. Therefore, the rotor 32 to which the knock rod 33 advances advances in the state in which the rotational force is applied.

Inside the front shaft 12, a ballpoint pen refill 21 is housed, which is spring-backed by a spring 23. The rear end of this ballpoint pen refill 21 is a holder protruding from the rear end of the front shaft 12.
While it is inserted in 43, the tip of rotor 32 is an actuator
The actuator 42 and the holder 43 are connected to each other by a push rod 41. That is, the forward force of the rotor 32 is
It is adapted to be transmitted to the ballpoint pen refill 21 via the 42, the push rod 41 and the holder 43. Therefore, when the rotor 32 moves back and forth, the push rod 41 and the ballpoint pen refill 21 also move back and forth, so that the pen body 22 opens at the tip opening of the tip 15.
Appears from 16. Here, as shown in FIG. 2, the push rod 41 is inserted into the two pipes 13 of the four pipes 13, and the push rod 41 cannot be seen from the outside. In addition,
The push rod 41 is not inserted into the other two pipes 13 and merely serves to connect the front shaft 12 and the rear shaft 11.

Then, when knocking operation is performed by pressing the knock cover 34 protruding from the rear end of the rear shaft 11, the protrusion 32a of the rotor 32 advances along the cam 31 in a state in which the knocking force is applied by the knock rod 33. Then, when it comes out of the cam 31, it rotates 60 ° and engages with the tip of the cam 31.
33 retreats. Therefore, the pen body 22 is attached to the tip opening 16 of the front port 15.
It becomes possible to write by protruding from. Then, when the knock operation is performed again, the protrusion of the rotor 32 engaged with the tip of the cam 31
32a is pushed up a little with the rotational force applied. Therefore, the protrusion 32a rotates 60 ° and retracts along the cam 31, so that the pen body 22 retracts into the front opening 15 and returns to the state shown in FIG.

At this time, the push rod 41 also moves in the pipe 13, but its movement cannot be seen, so even if a knock operation is performed, the rear shaft 11 and the front shaft 12 appear to be mechanically irrelevant to each other even if they are knocked. Instead, the pen body 22 appears and disappears from the tip opening 16 of the front opening 15. Therefore, it is a knock-type writing instrument that is magically interesting and extremely entertaining.

[Effect of device]

As described above, in the knock-type writing instrument of the present invention, the shaft cylinder is composed of the rear shaft having the retracting mechanism built therein and the front shaft containing the refill, and the front shaft and the rear shaft are provided at the central portion thereof. The peripheral part is connected with a thin pipe, and the push rod moves inside this pipe to transmit the pressing force of the retracting mechanism to the refill, so when the knocking operation is performed, the shaft cylinder is split at the middle part. The illusion that the pressing force of the retracting mechanism is not transmitted to the pen body, but the pen body nevertheless emerges from the front end opening of the front shaft, so it has a magical fun and is a very entertaining knock-type writing instrument. Becomes

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view of an embodiment of the present invention, and FIG. 2 is a view of FIG.
A sectional view taken along line II-II is shown. 11 …… rear axle, 12 …… front axle, 13 …… pipe, 15 …… front end,
21 …… Refill, 22 …… Pen body, 23 …… Spring,
31 …… Cam, 32 …… Rotor, 33 …… Knock rod, 34 …… Knock cover, 41 …… Push rod, 42 …… Operator, 43 …… Holder

Claims (1)

[Scope of utility model registration request] 1. A knock-type writing instrument in which a retracting mechanism and a refill are built in a barrel, and when a knock rod projecting from a rear end of the barrel is knocked, a pen body of the refill is projected and retracted from an opening at the tip of the barrel. Consists of a rear shaft with a built-in retracting mechanism and a front shaft containing a refill, and the vicinity of the opposing rear shaft and front shaft is connected with multiple thin pipes, and a push rod is installed in this pipe. A knock-type writing instrument that is inserted, and the push rod moves by knocking operation so that the pen appears.