Knock-type ballpoint pen

Abstract

To provide a retractable ballpoint pen that can be supplied at a relatively low price by reducing manufacturing costs in which pictures, characters, etc. are printed directly on an internal rotating element, and the printed part can be rotated each time clicking the top of the pen and the changes can be seen through a barrel and enjoyed.SOLUTION: The retractable ballpoint pen includes a barrel 1 whose inside can be seen through, a bush 2 which is molded separately from the barrel 1 and has a guide function and a locking function and is fitted and fixed inside the barrel 1, a knock rod 3 that slides vertically guided by the bush 2, and a rotary pipe 4 that holds a refill 6 and is constantly urged upward by a spring 7 wound around the tip of the refill 6. Pictures and characters are printed on the rotary pipe 4, and a rotor 5 that is guided by the bush 2 and slides in the vertical direction is integrally formed on the rotary pipe 4.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a knock-type ballpoint pen, and more specifically to a knock-type ballpoint pen in which a rotating pipe holding a refill in a transparent barrel rotates each time the pen is knocked, allowing the user to enjoy seeing through the changing characters and patterns printed on the rotating pipe. [Background technology]

[0002] Many knock-type ballpoint pens are equipped with a so-called knock cam mechanism, which pushes out the refill by knocking it, and when you release your finger from the lock, the refill locks and you can write with it.When you knock it again, the lock is released and the refill retracts.

[0003] This knock cam mechanism consists of a peripheral cam formed integrally with the barrel on its inner periphery, a knock bar connected to the knock and having protrusions on its outer periphery that slide along locking grooves formed at regular intervals on the peripheral cam, and a rotor to which the end of the refill is connected and having ribs on its outer periphery that slide along guide grooves formed at regular intervals on the peripheral cam. The rotor is constantly biased together with the refill by a spring wound around the refill, so that the upper surface of the inclined rib abuts against the sawtooth bottom surface of the knock bar. A triangular recessed locking portion is formed between the vertical grooves of the peripheral cam.

[0004] In the above configuration, the inclined surface of the sawtooth bottom of the knock bar abuts against the inclined surface of the rib, creating a force that constantly tries to rotate the rotor in one direction. When the knock bar is pressed down by knocking in this state, the rotor is pushed down and the rib comes out of the vertical groove, the rotor rotates, and the head of the rib slides along the inclined surface of the locking portion, locking it into the locking portion, keeping the tip of the refill exposed and enabling writing. Then, when the knock bar is pressed down again, the rib comes out of the locking portion, unlocking the rotor. The rotor rotates again due to the abutment of the inclined surfaces, and the rib enters the adjacent guide groove, raising the rotor and retracting the refill.

[0005] In the case of a knock-type ballpoint pen equipped with such a knock cam mechanism, the barrel of the ballpoint pen and the peripheral cam formed integrally with its inner surface are generally made of ABS resin, and the rotor that slides against the peripheral cam is made of polyacetal resin, which has good sliding properties against the peripheral cam and is resistant to friction.

[0006] A knock-rotating writing instrument with a display that sequentially displays information written in a display window each time the knock button of the writing instrument is pressed has been proposed. This writing instrument has a display window with a convex lens in the middle of the barrel of a conventional knock-rotating writing instrument, a hollow cylindrical shaft with a transparent outer layer in the pawl of the ratchet mechanism, and a piece of display paper or film inserted into the hollow layer of the shaft (Japanese Patent Application Laid-Open No. 2009-126173).

[0007] In the case of the writing implement according to this proposal, the information displayed through the display window is printed on a piece of marking paper or film, which requires time and effort to attach and detach the film during assembly. Naturally, the invention does not anticipate printing information directly onto the components of the writing implement. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-126173 Summary of the Invention [Problem to be solved by the invention]

[0009] As mentioned above, in the case of conventional writing instruments that sequentially display information written in a display window each time the knock is pressed, the information displayed in the display window is printed on a piece of paper or film, which makes assembly time-consuming, and it is not anticipated that the information will be printed directly on the components of the writing instrument. Therefore, the object of the present invention is to provide a knock-type ballpoint pen that has pictures, letters, etc. printed directly on the internal rotating element, which rotates the printed part each time the knock is pressed, allowing the user to enjoy seeing the changes through the barrel, and which can be supplied at a relatively low price by reducing manufacturing costs. [Means for solving the problem]

[0010] As a result of research and development carried out to solve the above-mentioned problems, the inventors discovered that it was necessary to print on the rotating elements inside the barrel, and that to do so the rotating elements needed to be made of a printable resin, and that the element (circumferential cam) used to drive the rotating elements needed to be made of a resin that allowed the rotating elements to slide easily, which led to the completion of this invention.

[0011] That is, the invention described in claim 1 to solve the above problem is as follows: The device comprises a barrel whose interior can be seen through, a bushing formed separately from the barrel and fitted and fixed in the barrel, which has a guide function and a lock function, a knock rod that slides up and down while being guided by the bushing, and a rotating pipe that holds a refill and is always urged upward by a spring wound around the tip of the refill, The rotating pipe has a pattern and / or Characters are printed on the rotating pipe, and a rotor that is guided by the bush and slides up and down is formed integrally with the rotating pipe, and the rotating pipe is locked by the bush every time the knock rod is knocked, and is then released from the locked state and rotates, and the changes in the pattern and characters that accompany the rotation can be seen through the barrel. This is a knock-type ballpoint pen characterized in that the barrel is made of ABS resin and the bushing is made of polyacetal resin.

[0012] The invention described in claim 2 to solve the above problem is: The device comprises a barrel whose interior can be seen through, a bushing formed separately from the barrel and fitted and fixed in the barrel, which has a guide function and a lock function, a knock rod that slides up and down while being guided by the bushing, and a rotating pipe that holds a refill and is always urged upward by a spring wound around the tip of the refill, The rotating pipe has a pattern and / or Characters are printed on the rotating pipe, and a rotor that is guided by the bush and slides up and down is formed integrally with the rotating pipe, and the rotating pipe is locked by the bush every time the knock rod is knocked, and is then released from the locked state and rotates, and the changes in the pattern and characters that accompany the rotation can be seen through the barrel. This knock-type ballpoint pen is characterized in that the rotating pipe including the barrel and the rotor is made of ABS resin, and the knock rod and the bushing are made of polyacetal resin. [Effects of the Invention]

[0013] The knock-type ballpoint pen of the present invention is as described above, in which the rotor that slides up and down while being guided by the bushing is formed integrally with the rotating pipe, and the rotating pipe is made of a material suitable for printing patterns and letters, and patterns and letters can be printed directly on the rotating pipe, so it can be manufactured and supplied at a relatively low cost, and the bushing that acts as a peripheral cam is molded separately from the barrel, which has the effect that the rotating pipe can be made of a strong resin that slides well. [Brief explanation of the drawings]

[0014] [Figure 1] 1A and 1B are a plan view and a front view showing the configuration of one embodiment of a knock-type ballpoint pen according to the present invention. [Figure 2] 1 is an exploded view showing the configuration of one embodiment of a knock-type ballpoint pen according to the present invention. [Figure 3] 2 is a cross-sectional view taken along line AA and line BB in FIG. 1. [Figure 4] 1A and 1B are an exploded view and an enlarged cross-sectional view along line CC of a rotating element in a knock-type ballpoint pen according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The embodiments of the present invention will be described in detail with reference to the accompanying drawings. The knock-type ballpoint pen of the present invention comprises a barrel 1 whose interior is visible, a bushing 2 that is molded separately from the barrel 1 and fitted and fixed within the barrel 1 to perform guide and lock functions, a knock rod 3 that slides up and down while being guided by the bushing 2, and a rotating pipe 4 that holds a refill 6 and is constantly urged upward by a spring 7 wound around the tip of the refill 6. A rotor 5 that slides up and down within the bushing 2 while being guided by the bushing 2 is integrally formed with the rotating pipe 4.

[0016] The barrel 1 is typically made of transparent or translucent ABS resin, the bushing 2 and knock rod 3, which are molded separately from the barrel 1, are made of polyacetal resin, and the rotating pipe 4 and the rotor 5, which are molded integrally with it, are also made of ABS resin, just like the barrel 1.

[0017] The reason for using such materials for each part is that it is necessary to print patterns and letters on the rotating pipe 4. That is, the rotating pipe 4 and the rotor 5 are made of ABS resin, which allows printing, and the bushing 2, against which the rotor 5 slides along its inner circumferential surface, is made of polyacetal resin, which is resistant to friction and allows the ABS resin rotor 5 to slide smoothly. The knock rod 3, which requires high friction strength, is also made of polyacetal resin. Because the bushing 2 is made of a different material from the barrel 1, it is molded separately from the barrel 1 and then pressed into the barrel 1 to be fixed.

[0018] A tip cap 8 is screwed onto the tip of the barrel 1, from which the tip of the refill 6 protrudes. A clip 9 is fitted to the rear end of the barrel 1, and a hollow knock 10 is inserted through the top opening of the clip 9, with the head of the knock rod 3 fitted into the hollow knock 10.

[0019] The knock rod 3 is cylindrical, and typically has three engaging protrusions 15 spaced at regular intervals on the lower part of its outer periphery. These protrusions engage with and slide in engaging grooves 11 formed vertically on the inner periphery of the bushing 2. The bottom surface of the knock rod 3 is formed into a sawtooth ring 16 (Figs. 2 and 4).

[0020] The rotor 5 is formed by forming three ribs 17, usually at regular angular intervals, on the circumferential surface of a cylindrical shaft, and the head surfaces 17a of the ribs 17 are inclined (Figs. 2 and 4). These ribs 17 engage with guide grooves 12 formed vertically on the inner circumferential surface of the bushing 2, and slide up and down. The head surfaces 17a also come into contact with the inclined surfaces of the sawtooth rings 16 on the bottom surface of the knock bar 3, and as will be described later, are subjected to a rotational driving action in the horizontal direction from the sawtooth rings 16. The rotor 5 is molded integrally with the rotary pipe 4, and suitable patterns and letters are printed on the rotary pipe 4. In some cases, the patterns and letters extend to the rotor 5.

[0021] The bushing 2 has substantially the same configuration and function as the peripheral cam in a conventional knock cam mechanism. That is, the inner peripheral surface of the bushing 2 is formed with a locking groove 11 into which the engaging protrusion 15 engages and a guide groove 12 into which the rib 17 moves in and out, and also with a triangular recessed locking portion 13 formed on the bottom surface between the guide grooves 12 to lock the rib 17 (Figs. 2 and 4).

[0022] In the above-described configuration, when the refill 6 is immersed in the tip cap 8, the rotor 5 integral with the rotary pipe 4 is urged upward by the spring 7 with its rib 17 engaged in the guide groove 12, and the head surface 17a of the rib 17 is in contact with the sawtooth ring 16 of the knock rod 3 fitted in the bushing 2 (FIG. 3). In this state, when the knock rod 3 descends in response to a knocking operation on the hollow knock 10, the rib 17 is pressed downward while engaged in the guide groove 12.

[0023] When the engaging protrusion 15 of the knock bar 3 is pushed down to the bottom of the locking groove 11, the rib 17 disengages from the guide groove 12. Immediately, the rotor 5 and the rotating pipe 4 integral with it are rotated by the lateral force of the sawtooth ring 16, and the rib 17 disengages from the guide groove 12. When the finger is then released from the knock 10, the rotor 5 continues to be biased by the spring 7 and rises, but because the rib 17 is disengaged from the guide groove 12, the head surface 17a of the rib 17 disengages from the sawtooth ring 16 and abuts against the slope of the locking portion 13 of the bushing 2, sliding along the slope until it reaches the innermost part of the locking portion 13 and is locked. In this state, the refill 6 remains exposed, allowing writing.

[0024] If the knock is then operated again, the rib 17 moves laterally due to the action of the sawtooth ring 16, as described above, and escapes from the locking portion 13 and reaches the guide groove 12. The resilience of the spring 7 causes the rib 17 to rise within the guide groove 12, causing the refill 6 to retract.

[0025] As described above, the rotating pipe 4 rotates in one direction each time it is knocked, and the images and letters printed on it also rotate, allowing you to enjoy the changes that accompany the rotation through the barrel 1.

[0026] Since the refill 6 can be removed from the rotating pipe 4, it is possible to replace just the refill 6, but in the case of the knock-type ballpoint pen of the present invention, since pictures, letters, etc. can be printed on the rotating pipe 4, it can be supplied at a relatively low cost. Therefore, by preparing a variety of pictures, letters, etc. to be printed on the rotating pipe 4, it is possible to commercialize the refill 6 and the rotating pipe 4 as an integrated unit, and the rotating pipe 4 including the refill 6 can be replaced. [Industrial Applicability]

[0027] The knock-type ballpoint pen of the present invention is as described above, in which the rotor that slides up and down while being guided by the bushing is formed integrally with the rotating pipe, and the rotating pipe is made of a material suitable for printing patterns and letters, and patterns and letters can be printed directly on the rotating pipe, so it can be manufactured and supplied at a relatively low cost, and by molding the bushing that acts as a peripheral cam separately from the barrel, it has the effect that the rotating pipe can be made of a strong resin that has good sliding properties, and it has great industrial applicability. [Explanation of symbols]

[0028] 1 shaft cylinder 2. Bush 3 Knock stick 4 Rotating Pipe 5 rotor 6 refills 7 Spring 8 Tip cap 9 clips 10 Hollow Knock 11 Locking groove 12 Guide groove 13 Rock Club 15 Engaging prongs 16 Sawtooth Ring 17 Ribs

Claims

1. The device comprises a barrel whose interior can be seen through, a bushing formed separately from the barrel and fitted and fixed in the barrel, which has a guide function and a lock function, a knock rod that slides up and down while being guided by the bushing, and a rotating pipe that holds a refill and is always urged upward by a spring wound around the tip of the refill, A pattern and / or letters are printed on the rotary pipe, and a rotor that is guided by the bush and slides up and down is integrally formed with the rotary pipe, and the rotary pipe is locked by the bush every time the knock rod is knocked, and is released from the locked state and rotates, and the change in the pattern and / or letters that accompanies the rotation can be seen through the barrel. A knock-type ballpoint pen, characterized in that the barrel is made of ABS resin and the bushing is made of polyacetal resin.

2. The device comprises a barrel whose interior can be seen through, a bushing formed separately from the barrel and fitted and fixed in the barrel, which has a guide function and a lock function, a knock rod that slides up and down while being guided by the bushing, and a rotating pipe that holds a refill and is always urged upward by a spring wound around the tip of the refill, A pattern and / or letters are printed on the rotary pipe, and a rotor that is guided by the bush and slides up and down is integrally formed with the rotary pipe, and the rotary pipe is locked by the bush every time the knock rod is knocked, and is released from the locked state and rotates, and the change in the pattern and / or letters that accompanies the rotation can be seen through the barrel. A knock-type ballpoint pen, characterized in that the rotating pipe including the barrel and the rotor is made of ABS resin, and the knock rod and the bushing are made of polyacetal resin.

Images