Pressing writing instrument

Abstract

Provided is a push type writing instrument capable of easily and reliably mounting an operation body detached from a feeding mechanism of a writing body to the feeding mechanism. The push type writing instrument has a shaft cylinder (2), a writing body (8) housed inside the shaft cylinder (2), a feeding mechanism (3) that feeds the writing body (8) forward, and an operation body (4) disposed behind the feeding mechanism (3). The push type writing instrument has a handwriting change member (5) mounted in front of the operation body (4) and used to remove, thermally color, or hide handwriting written by the writing body (8). At least a part of the operation body (4) protrudes from the shaft cylinder (2), and the operation body (4) is mounted to the shaft cylinder (2) in a manner capable of sliding forward and backward and capable of being attached and detached, by using magnetic force acting between the shaft cylinder (2) and the operation body (4).

Description

Technical Field

[0001] This invention relates to the mounting structure of the operating body of a push-button writing instrument. Background Technology

[0002] Writing instruments have long been known to be able to alter handwriting by erasing the writing on the writing instrument with a writing-changing component housed within the writing instrument, removing the writing from the writing surface, or changing the color from colored to colored or from colored to colorless.

[0003] As an example of the aforementioned writing instrument, JP2011-230357A discloses a press-type mechanical pencil that removes the writing from the writing surface by removing the cap, which is detachably mounted to the rear opening of the cylinder, exposing the eraser, which is a writing-changing component, and erasing the writing from the lead.

[0004] According to JP2011-230357A, a press-type mechanical pencil has the following structure: a cylindrical cap protrudes from the rear opening of the shaft, and an eraser is provided inside the cap. By pressing the cap, which serves as the operating body, the lead feed mechanism of the shaft is operated, and the lead is fed out from the writing tip located at the front of the shaft. By removing the cap installed at the rear of the lead feed mechanism, the eraser is exposed, and the writing by the mechanical pencil is erased with the eraser, thereby removing the writing.

[0005] However, in the push-button mechanical pencil of JP2011-230357A, to prevent the cap from detaching from the lead feed mechanism during writing or carrying, the cap is installed in a detachable manner using pressing or locking mechanisms. Therefore, when the cap is installed on the lead feed mechanism, the mechanism is pressed forward, and the lead may be unintentionally fed forward. Furthermore, because the cap installation process is interrupted midway, it cannot be securely installed, resulting in the cap falling off during writing or carrying, potentially leading to damage, loss, and soiling of the exposed eraser. Summary of the Invention

[0006] The present invention was made based on the above background, and its purpose is to provide a push-button writing instrument that allows for easy and reliable reinstallation of the operating body removed from the shaft without causing malfunctions in the feeding mechanism.

[0007] [1] The characteristic of the press-type writing tool of this embodiment is that the press-type writing tool has: a shaft cylinder; a writing body housed inside the shaft cylinder and having a writing section at the front end; a delivery mechanism that delivers the writing body forward; and an operating body disposed behind the delivery mechanism for operating the delivery mechanism. The press-type writing tool has a handwriting changing component locked in front of the operating body. The handwriting changing component is used to remove, heat-change, or conceal the handwriting written by the writing body. At least a portion of the operating body protrudes from the shaft cylinder, and the operating body is mounted on the shaft cylinder in a manner that allows it to slide back and forth and can be detached by using a magnetic force acting between the shaft cylinder and the operating body.

[0008] [2] The push-type writing tool of this embodiment is the push-type writing tool described in [1], characterized in that either the shaft or the operating body has a magnet, and the other has a strong magnetic body that is attracted by the magnetic force of the magnet.

[0009] [3] The press-type writing tool of this embodiment is the press-type writing tool described in [2], characterized in that the delivery mechanism is operated by operating the operating body, and when the distance between the magnet and the strong magnetic body is expanded to the maximum, the operating body is returned to the position before operation by only the magnetic force acting between the magnet and the strong magnetic body.

[0010] [4] The push-type writing instrument of this embodiment is any one of [1] to [3], characterized in that, when the operating body is removed from the shaft cylinder, even if the front and back directions of the operating body are reversed, the operating body can be installed on the shaft cylinder in a way that is easy to install and remove using magnetic force.

[0011] [5] The push-type writing tool of this embodiment is the push-type writing tool described in [4], characterized in that when the operating body is installed on the shaft in a back-to-back manner, the operating body abuts against the limiting part that restricts the forward movement of the operating body. Attached Figure Description

[0012] Figure 1 This is a longitudinal sectional view of the push-to-write tool according to the first embodiment of the present invention.

[0013] Figure 2 It is shown Figure 1 An enlarged sectional view of section AA.

[0014] Figure 3 It is shown in Figure 1 An exploded diagram of a push-button writing instrument, showing the relationship between the operating body and the components fixed to it.

[0015] Figure 4 It is shown in Figure 1 A longitudinal sectional view of the state of the clamp after the operating body is moved forward in a press-type writing instrument.

[0016] Figure 5 It is used to show in Figure 1 An explanatory diagram showing the state of a push-button writing instrument with the control body removed.

[0017] Figure 6 It shows from Figure 5 The longitudinal sectional view shows the state in which the front and rear directions of the operating body are reversed and it is reinstalled on the shaft cylinder.

[0018] Figure 7 This is a longitudinal sectional view of the shake-out mechanical pencil according to the second embodiment of the present invention.

[0019] Figure 8 It is shown Figure 7 An enlarged sectional view of the BB section.

[0020] Figure 9 It is shown in Figure 7 An exploded view of a shake-out mechanical pencil, showing the relationship between the operating body and the components fixed to it.

[0021] Figure 10 It is shown in Figure 7 A longitudinal sectional view of a shake-out mechanical pencil, showing the state after the gripper has been moved forward by operating the operating body.

[0022] Figure 11 It is used to show in Figure 7 An explanatory diagram showing the state of a shake-out mechanical pencil with the control unit removed.

[0023] Figure 12 It shows from Figure 11 The longitudinal sectional view shows the state in which the front and rear directions of the operating body are reversed and it is reinstalled on the shaft cylinder.

[0024] Figure 13 This is a longitudinal sectional view showing the thermochromic writing instrument in a non-use state according to the third embodiment of the present invention.

[0025] Figure 14 yes Figure 13 Enlarged sectional view along the CC line.

[0026] Figure 15 This is an exploded view of the second operator.

[0027] Figure 16 From Figure 13 The longitudinal section view of the state in which the second manipulator moves forward.

[0028] Figure 17 This is a longitudinal sectional view of the third embodiment of the present invention in use, showing the process from... Figure 16 The diagram shows the state in which the second operator moves backward.

[0029] Figure 18 It is used to explain from Figure 13 The diagram illustrates the state of the second operating body after it has been removed.

[0030] Figure 19 It shows from Figure 13 The longitudinal sectional view shows the state after the second operating body has been removed and installed in an inverted manner. Detailed Implementation

[0031] Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the accompanying drawings, for ease of illustration and understanding, the scale and aspect ratios are sometimes appropriately altered or exaggerated relative to the actual object.

[0032] The terms used in this specification to define shape, geometry, conditions and degree, such as “parallel,” “perpendicular,” “same,” etc., as well as the values ​​of length and angle, are not strictly defined, but are interpreted to include the range of degrees to which the same function can be expected.

[0033] In this instruction manual, the direction (length direction) extending from the central axis of the push-button writing instruments 1, 101, and 201 is defined as the axial direction or length direction, the direction perpendicular to the axial direction is defined as the radial direction, and the direction along the circumference of the central axis is defined as the circumferential direction. Furthermore, along the axial direction, the side containing the front opening of the cylinder (the tip side) is represented as the front, and the opposite direction is represented as the rear. Furthermore, along the radial direction, the direction toward the axis (central axis) of the cylinder is represented as the inside or inner side, and the opposite direction is represented as the outside or outer side.

[0034] (First Implementation)

[0035] The first embodiment of the present invention uses a press-type mechanical pencil as an example of a press-type writing instrument 1, but the present invention is not limited thereto, and any press-type writing instrument can be widely used.

[0036] Figure 1 This is a longitudinal sectional view of the push-to-write tool according to the first embodiment of the present invention. Figure 2 It is shown Figure 1 Enlarged sectional view of section AA. Figure 3 It is shown in Figure 1An exploded diagram of a push-button writing instrument, used to illustrate the relationship between the operating body and the components fixed to it. Figure 4 It is shown in Figure 1 A longitudinal sectional view of the state of the gripper after it has been moved forward by operating the control body in a push-button writing instrument. Figure 5 It is used to show in Figure 1 An explanatory diagram showing the state of the operating element removed from a push-button writing instrument. Figure 6 It shows from Figure 5 The longitudinal sectional view shows the state in which the front and rear directions of the operating body are reversed and it is reinstalled on the shaft cylinder.

[0037] like Figure 1 and Figure 2 As shown, the mechanical pencil 1 consists of a cylinder 2, a feeding mechanism 3, and an operating body 4. The feeding mechanism 3 is disposed inside the cylinder 2 and has a clamp 31 for holding the pencil lead 8 formed by the lead core as the writing surface. The operating body 4 is mounted behind the feeding mechanism 3 in a manner that allows it to be freely attached to or detached from the cylinder 2, and protrudes rearward from the rear end opening 2c of the cylinder 2.

[0038] The shaft cylinder 2 has a pointed cylindrical pen tip 23, a cylindrical front shaft 21 threaded to the rear of the pen tip 23, and a cylindrical rear shaft 22 threaded to the rear of the front shaft 21. An inner hole extending in the front-to-back direction is formed inside the shaft cylinder 2. A handle 2a made of an elastomer is integrally formed on the outer periphery of the shaft cylinder 2 (front shaft 21) by two-color molding.

[0039] On the inner periphery of the front part of the shaft cylinder 2 (pen tip 23), a core retaining member 24 is fixed by pressing or over fitting to hold the pen tip 8 with a light force, and a front opening 2b for the pen tip 8 to enter and exit is formed at the front end of the shaft cylinder 2 (pen tip 23).

[0040] A rear opening 2c is formed at the rear end of the shaft cylinder 2 (the rear end of the rear shaft 22). A cylindrical body 7 made of a strongly magnetic material is pressed into or fits over the rear opening 2c. Thus, the cylindrical body 7 is fixed relative to the shaft cylinder 2, forming a mounting port 9 composed of the cylindrical body 7 and the inner periphery of the rear shaft 22. The operating body 4, described later, is detachably mounted and slidably back and forth at the mounting port 9. In addition, an inwardly protruding, stepped, restrictive portion 2d is formed on the inner periphery of the shaft cylinder 2 (rear shaft 22).

[0041] The delivery mechanism 3 includes: a clamp 31 that holds the pen refill 8; a refill storage tube 34 that is connected to the rear of the clamp 31 and stores the pen refill 8; a fastener 32 that is externally embedded in the head 31a of the clamp 31; a connector 33 that receives the fastener 32 at the rear; an elastic body 35 that is disposed between the connector 33 and the refill storage tube 34 and is composed of a compression coil spring; and a rear connecting cylinder 36 that is cylindrical and connected to the rear of the refill storage tube 34.

[0042] The clamp 31 is configured to move back and forth relative to the connector 33 together with the core storage tube 34. Moreover, the head 31a of the clamp 31 is divided into two parts along the axial direction, and the divided heads 31a are formed to face forward and gradually separate from each other, and are configured to clamp the pen core 8 by using the fastener 32 to flex the heads 31a in the radial inward direction.

[0043] The connector 33 is clamped and fixed to the shaft cylinder 2 by the front end of the front shaft 21 and the inner section of the pen tip 23 that is screwed to the front shaft 21. In addition, an elastic body 35 is provided between the inner section of the connector 33 and the front end of the core storage tube 34. The elastic force of the elastic body 35 is used to spring the clamp 31 and the core storage tube 34 backward relative to the connector 33 and the shaft cylinder 2.

[0044] The diameter of the rear part of the rear connecting cylinder 36 is larger than that of the front part, and the inner circumference is formed into a funnel shape that slopes towards the center. It is configured such that the front end of the operating body 4 abuts against the rear end of the rear connecting cylinder.

[0045] The operating body 4 has a cylindrical operating body 41, a cylindrical front tube 42 that is pressed into or extends beyond the front outer periphery of the operating body 41, and a tail cap 43 that is pressed into or extends beyond the rear inner periphery 4c of the operating body 41.

[0046] A handwriting changer 5 with a cylindrical eraser is detachably mounted on the inner periphery 4a of the front part of the operating body 41. The handwriting changer 5 is mounted so as to protrude forward from the front end of the operating body 4, and a protrusion 5a of the handwriting changer 5 is formed at the front of the operating body 4. In addition, a rear section 4d is formed at the rear of the operating body 4 (tail cap 43) so that it can abut against the limiting part 2d of the shaft cylinder 2 when the operating body 4 is mounted upside down on the shaft cylinder 2.

[0047] A magnet 6, made of permanent magnets, is pressed into or fitted over the central inner circumference 4b of the aforementioned operating body 4 (operating main body 41). The axial length of the magnet 6 is formed to be approximately the same as the axial length of the cylindrical body 7 (strong magnetic body). Furthermore, as... Figure 2 As shown, in this embodiment, the magnet 6 is formed such that, when viewed in cross-section, one half is the N pole 6a and the remaining half is the S pole 6b. Therefore, the magnet 6... Figure 2A strong magnetic field is generated in the direction of the arrow.

[0048] A circumferential protrusion 4e is formed on the central outer periphery of the operating body 4 (operating main body 41), protruding outward and extending circumferentially. The circumferential protrusion 4e is formed to be located approximately at the center of the magnet 6 in the axial direction. Through this circumferential protrusion 4e, when the operating body 4 slides back and forth relative to the shaft cylinder 2 and is loaded and unloaded, even if the operating body 4 vibrates in the radial direction, the inner surface of the cylindrical body 7 or the shaft cylinder 2 will not come into face contact with the outer surface of the operating body 4, the contact area is reduced, and thus the contact resistance during movement can be reduced.

[0049] As described above, the operating body 4 is installed in the mounting port 9 of the shaft cylinder 2 in a manner that allows for easy loading and unloading and free sliding along the axial direction. During installation, the operating body 4 is attracted to the cylindrical body 7 (a strongly magnetic body) by the magnetic force of the magnet 6. At this time, the magnetic force of the magnet 6 is... Figure 2 The arrow direction, i.e., the axial direction, acts strongly, and the axial lengths of magnet 6 and cylindrical body 7 (strong magnetic body) are formed to be approximately the same length. Thus, magnet 6 is stably fixed axially at approximately the same position as cylindrical body 7 (strong magnetic body) by magnetic force. Furthermore, when operating body 4 is installed on shaft cylinder 2, the front end of operating body 4 (front cylinder 42) abuts against the rear end of delivery mechanism 3 (rear connecting cylinder 36). Therefore, by pressing operating body 4 forward, the rear connecting cylinder 36 of delivery mechanism 3 can be pressed forward.

[0050] The handwriting change component 5 consists of an eraser 51 and a cover 52. The eraser 51 is made of synthetic rubber, and the cover 52 is pressed into and fitted into the outer periphery of the eraser 51. When the handwriting change component 5 is installed on the inner periphery 4a of the front part of the operating body 4, the outer part of the cover 52 abuts against the front end of the operating body 4, so that it does not go deeper or even sink in, forming a protrusion 5a.

[0051] Next, use Figure 1 and Figure 4 The state in which the pen tip 8 is ejected from the front opening 2b of the cylinder 2 (pen tip 23) by advancing the operating body 4 will be described. Figure 1When the operating body 4 is pressed forward, the rear connecting cylinder 36, which abuts against the front end of the operating body 4, is also pressed forward. The core storage tube 34, which is connected to the rear connecting cylinder 36, and the clamp 31, which is connected to the core storage tube 34, advance relative to the shaft cylinder 2 and the connecting member 33 while holding the pen refill 8 against the elastic force of the elastic body 35. The pen refill 8 is then delivered from the front opening 2b of the shaft cylinder 2. At this time, as the clamp 31 advances, the fastener 32, which is embedded in the head 31a of the clamp 31, also advances. However, because the front end of the fastener 32 abuts against the inner section 2e of the shaft cylinder 2 (pen tip 23), the fastener 32 disengages from the head 31a of the clamp 31. The head 31a expands and releases the clamping state of the pen refill 8, and the advancement of the pen refill 8 stops. Then, when the forward pressing of the operating body 4 is released, the clamp 31 retracts due to the elastic force of the elastic body 35, and the fastener 32 is once again externally engaged in the head 31a, thus the pen refill 8 is clamped by the clamp 31. At this time, even in the forward state, the operating body 4 is pulled backward by the magnetic force acting between the magnet 6 and the cylindrical body 7 until the axial positions of the magnet 6 and the cylindrical body 7 are aligned. Therefore, it is not necessary to use the elastic body 35 to spring the operating body 4 backward, and the elastic force of the elastic body 35 can reduce the weight of the operating body 4 by a certain amount.

[0052] Next, use Figure 1 and Figure 5 The state after removing the operating body 4 from the shaft cylinder 2 and reinstalling it in the shaft cylinder 2 will be described. The press-type writing instrument 1 of this embodiment... Figure 1 The state shown indicates that the operating body 4 is held in place, and against the magnetic force acting between the magnet 6 and the cylindrical body 7 (a strongly magnetic body), the operating body 4 is pulled backward, thereby... Figure 5 As shown, the operating body 4 can be pulled out from the cylinder 2. At this time, since the handwriting changer 5 is pulled out and exposed to the outside along with the operating body 4, it can be firmly held by the operating body 4 as a gripping part. By erasing the writing on the lead 8 (which serves as the lead core) with the handwriting changer 5 (eraser 51), the writing can be removed from the writing surface. Furthermore, with the operating body 4 detached from the cylinder 2, the rear connecting cylinder 36 has a rear opening. Therefore, by inserting a refillable lead into the cylinder 2 through the rear opening 2c of the cylinder 2, a lead can be replenished from the funnel-shaped rear inner periphery of the rear connecting cylinder 36 into the lead storage tube 34. Then, when the detached operating body 4 is brought close to the mounting port 9 of the cylinder 2 from the handwriting changer 5, the operating body 4 is attracted into the cylinder 2 by the magnetic force of the magnet 6, adhering to its original position. Figure 1 The position of the device is as follows. During installation, the rear end of the delivery mechanism 3 (rear connecting cylinder 36) abuts against the front end of the operating body 4 (front cylinder 42). Therefore, by configuring it to produce a "click" and abutting sound upon contact, the user can sense through sound that the installation of the operating body 4 is complete.

[0053] Furthermore, in this embodiment, in such Figure 5 When the operating body 4 is reinstalled into the shaft cylinder 2 from its pulled-out state, it can be installed into the shaft cylinder 2 even if the front-to-back direction of the operating body 4 is reversed. When the operating body 4 is reversed and approached from the rear end (tail cap 43) side to the mounting port 9 of the shaft cylinder 2, similar to the case of installation from the handwriting change component 5 side, the operating body 4 is attracted and installed into the cylindrical body 7 (strong magnetic body) of the shaft cylinder 2 by the magnetic force of the magnet 6. Figure 6 The state. In this Figure 6 In this state, the operating body 4 is mounted on the shaft cylinder 2 with the limiting part 2d of the shaft cylinder 2 abutting against the rear section 4d of the operating body 4 and the protrusion 5a of the handwriting changing component 5 protruding rearward from the rear end opening 2c of the shaft cylinder 2. Therefore, when in Figure 6 When the ink is scraped off the ink on the pen tip 8 using the ink-changing component 5 (eraser 51), the swivel can be performed by holding the shaft 2. The shaft diameter of the shaft 2 is thicker than that of the operating body 4, so it is easier to apply force compared to gripping the operating body 4 to perform the scraping action. Therefore, the swivel action can be performed easily to remove the ink.

[0054] In this embodiment, the material constituting the above-mentioned cylindrical body 7 (strong magnetic body) is a material that is attracted by the magnetic force of the magnet 6. Preferably, a material that is strongly magnetized by a magnetic field and retains magnetization even after the magnetic field is removed is used, such as iron, cobalt, nickel and their alloys, ferrite, etc.

[0055] In this embodiment, a press-type writing instrument 1 can be provided, which can easily and reliably reinstall the operating body 4, which is removed from the shaft cylinder 2, onto the shaft cylinder 2 using magnetic force without causing malfunctions to the delivery mechanism 3.

[0056] The push-type writing instrument 1 of this embodiment includes: a shaft cylinder 2; a writing body 8 housed inside the shaft cylinder 2 and having a writing section at its front end; a delivery mechanism 3 that delivers the writing body 8 forward; and an operating body 4 disposed behind the delivery mechanism 3. The push-type writing instrument 1 has a handwriting changing component 5 that is engaged in front of the operating body 4 for removing, heat-changing, or concealing the handwriting written by the writing body 8. At least a portion of the operating body 4 protrudes from the shaft cylinder 2, and the operating body 4 is mounted to the shaft cylinder 2 in a manner that allows it to slide back and forth and is detachable, utilizing the magnetic force acting between the shaft cylinder 2 and the operating body 4.

[0057] According to this press-type writing instrument 1, the operating body 4, which operates the delivery mechanism 3 for feeding the writing material 8, is magnetically mounted to the shaft cylinder 2 in a sliding and easily detachable manner. Since it does not have a locking or pressing structure relative to the operating mechanism, the operating mechanism is not pressed during installation, thereby preventing the delivery mechanism 3 from unintentionally operating and feeding the writing material 8. In addition, since there is a handwriting changing component 5 in front of the operating body 4, the handwriting changing component 5 can be removed at the same time when the operating body 4 is removed from the shaft cylinder 2. The handwriting changing component 5 will not be smudged by hand oil or the like when the operating body 4 is held. Furthermore, by holding it firmly, it is easy to perform scraping actions to erase or change the color of the writing, or actions to conceal the writing. In addition, the handwriting change component 5 can be stored in the cylinder 2 when not in use. Therefore, when it is not in use or when it is carried in a bag, pencil case or other similar container, it can prevent the handwriting change component 5 from being damaged or soiled by other items, and can also prevent the handwriting change component 5 from damaging or soiling other items.

[0058] The handwriting-changing component 5 in this embodiment can be an eraser made of synthetic rubber that removes handwriting produced by a lead core by scraping, a friction body made of an elastic material that changes color from colored to colored or from colored to colorless due to frictional heat when scraping handwriting produced by thermochromic ink or a solid core, a correction fluid for concealing handwriting by applying paint to the handwriting, or a correction tape for concealing handwriting by sticking tape to the handwriting. It is more preferable to use an eraser or friction body material that can be easily fixed without requiring a large space. Furthermore, the press-type writing instrument 1 of this embodiment can be applied to press-type mechanical pencils, ballpoint pens, markers, fountain pens, multi-core writing instruments, etc. Additionally, the elastic material constituting the friction body is preferably an elastic synthetic resin (rubber, elastomer), such as silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorinated resins, chloroprene resin, nitrile resins, polyester resins, ethylene propylene diene monomer (EPDM), etc.

[0059] In the push-type writing instrument 1 of this embodiment, a magnet 6 is provided in either the cylinder 2 or the operating body 4, and a strongly magnetic body 7 is provided in the other party, which is magnetically attracted by the magnetic force of the magnet 6.

[0060] According to this press-type writing instrument 1, the magnetic force generated by the magnet 6 of either the cylinder 2 or the operating body 4 attracts the strong magnetic body 7 of the other, thus allowing the operating body 4 to be fixed relative to the cylinder 2 by magnetic force without using a pressing or locking mechanism. Furthermore, when installing the operating body 4 onto the cylinder 2 by magnetic force, it is preferable to adjust the magnetic force, magnetic field, shape, and distance between the magnet 6 and the strong magnetic body 7 to stabilize the axial position of the operating body 4 relative to the cylinder 2. Therefore, when installing the operating body 4 onto the cylinder 2, it is possible to prevent the operating mechanism from malfunctioning due to the operating body 4 pressing the operating mechanism forward.

[0061] In addition, the strongly magnetic material 7 in this embodiment refers to a substance that is strongly magnetized by a magnetic field and remains magnetized even after the magnetic field is removed, such as iron, cobalt, nickel and their alloys, ferrites, etc.

[0062] In the press-type writing instrument 1 of this embodiment, the delivery mechanism 3 is activated by operating the operating body 4. When the distance between the magnet 6 and the strong magnetic body 7 is maximized, the operating body 4 is returned to the position before operation by the magnetic force acting between the magnet 6 and the strong magnetic body 7.

[0063] According to this press-type writing instrument 1, even if the operating body 4 is moved forward by pressing or the like, the operating body 4 will return to its original position by magnetic force. Therefore, it is not necessary to apply force to the operating body 4 by compression springs such as coil springs, which can simplify the structure of the operating mechanism and reduce costs.

[0064] In the push-type writing instrument 1 of this embodiment, when the operating body 4 is removed from the shaft cylinder 2, even if the front and back directions of the operating body 4 are reversed, it can be installed on the shaft cylinder 2 in a way that is easy to install and remove by magnetic force.

[0065] According to this press-type writing instrument 1, the handwriting changing component 5, which is locked to the operating body 4, is configured to protrude rearward from the rear end of the shaft cylinder 2. This prevents the loss or damage of the disassembled operating body 4. Furthermore, when using the handwriting changing component 5 to remove, change color, or conceal handwriting, the shaft cylinder 2 can be held in place for operation. Therefore, it is preferred because it is firmly held by gripping the shaft cylinder 2, which is at least as thick as the shaft of the operating body 4, and it is easy to apply force.

[0066] In the push-type writing instrument 1 of this embodiment, when the operating body 4 is installed on the shaft cylinder 2 with the front and back reversed, the operating body 4 abuts against the limiting part 2d that restricts the forward movement of the operating body 4.

[0067] According to this press-type writing instrument 1, even when force is applied when using the handwriting change component 5, it is possible to prevent the handwriting change component 5 from moving forward with the operating body 4 and sinking into the shaft cylinder 2, so that force can be applied further when using the handwriting change component 5.

[0068] This embodiment provides a press-type writing instrument 1 in which the operating body 4, which can be easily and reliably installed on the feeding mechanism 3, can be detached from the writing body 8.

[0069] In addition, in this embodiment, the handwriting change component 5 is exemplified as an eraser made of synthetic rubber for removing the lead of a mechanical pencil, but this embodiment is not limited to this. For example, an elastic friction body can also be used, which is used to cause the handwriting produced by thermochromic ink or thermochromic solid core to change color from colored to colorless and from colored to colored due to the frictional heat generated by scratching. Correction fluid for concealing handwriting by applying paint to the handwriting, correction tape for concealing handwriting by sticking tape to the handwriting, etc., can also be used.

[0070] The push-type writing instrument of this embodiment can be widely used in push-type writing instruments, including not only push-type mechanical pencils, but also push-type ballpoint pens, markers, fountain pens, multi-core writing instruments, etc.

[0071] (Second Implementation)

[0072] Figure 7 This is a longitudinal sectional view of the shake-out mechanical pencil according to the second embodiment of the present invention. Figure 8 It is shown Figure 7 Enlarged sectional view of the BB section. Figure 9 It is shown in Figure 7 An exploded view of a shake-to-open mechanical pencil, showing the relationship between the operating body and the components fixed to it. Figure 10 It is shown in Figure 7 A longitudinal sectional view of a shake-out mechanical pencil in which the gripper is moved forward by operating the actuator. Figure 11 It is used to show in Figure 7 An illustration showing the state of a shake-out mechanical pencil after the control unit has been detached. Figure 12 It shows from Figure 11 The longitudinal sectional view shows the state in which the front and rear directions of the operating body are reversed and it is reinstalled on the shaft cylinder.

[0073] like Figure 7 and Figure 8As shown, the shake-out mechanical pencil 101 includes: a barrel 102; a lead delivery mechanism 103 having a clamp 131 disposed inside the barrel 102 and clamping a lead 108 formed from a lead core as a writing surface, and a lead storage component (lead storage tube) 134 for storing the lead 108; a weight body 110 that is fitted with the lead storage component 134 with a gap in a manner that allows it to move back and forth; and an operating body 104 disposed behind the lead delivery mechanism 103, which is mounted on the barrel 102 in a detachable manner and protrudes rearward from the rear end opening 102c of the barrel 102.

[0074] The shaft cylinder 102 has a pointed cylindrical pen tip 123, a cylindrical front shaft 121 threaded to the rear of the pen tip 123, and a cylindrical rear shaft 122 threaded to the rear of the front shaft 121. An inner hole extending in the front-to-back direction is formed inside the shaft cylinder 102. On the outer periphery of the shaft cylinder 102 (front shaft 121), a handle 102a made of an elastomer is integrally formed by two-color molding.

[0075] On the inner periphery of the front part of the cylinder 102 (pen tip 123), a core retaining member 124 is fixed by pressing or over fitting to hold the pen tip 108 with a light force. A front opening 102b for the pen tip 108 to enter and exit is formed at the front end of the cylinder 102 (pen tip 123).

[0076] A rear opening 102c is formed at the rear end of the shaft cylinder 102 (the rear end of the rear shaft 122). A cylindrical body 107 made of a strongly magnetic material is pressed into or fits over the rear opening 102c. Thus, the cylindrical body 107 is fixed relative to the shaft cylinder 102, forming a mounting port 109 formed by the cylindrical body 107 and the inner periphery of the rear shaft 122. The operating body 104, described later, is detachably mounted in the mounting port 109, allowing it to slide freely back and forth. In addition, an inwardly protruding, stepped, restrictive portion 102d is formed on the inner periphery of the shaft cylinder 102 (rear shaft 122), and a similarly inwardly protruding protrusion 102f is formed in front of the restrictive portion 102d.

[0077] The core delivery mechanism 103 includes: a clamp 131 that holds the pen core 108; a connector 137 that is cylindrical and connected to the rear of the clamp 131; a core receiving component 134 that is connected to the rear of the connector 137 and receives the pen core 108; a fastener 132 that is externally embedded in the head 131a of the clamp 131; a connecting member 133 that receives the fastener 132 at the rear; an elastic body 135 that is disposed between the connecting member 133 and the core receiving component 134 and is composed of a compression coil spring; and a rear connecting cylinder 136 that is cylindrical and connected to the rear of the core receiving component 134.

[0078] The clamp 131 is configured to move back and forth relative to the connector 133 together with the connector 137 and the core storage component 134. Moreover, the head 131a of the clamp 131 is divided into two parts along the axial direction, and the divided heads 131a are formed to face forward and gradually separate from each other, and are configured to clamp the pen refill 108 by using fasteners 132 to flex the heads 131a radially inward.

[0079] On connector 137, elastic sheets are formed at two opposite locations at the base of the connector 137, extending circumferentially from the base. Additionally, a contact portion 137a protruding rearward in an axial direction is formed at the front end of each of the elastic sheets. Furthermore, the front end of the weight body 110 abuts against the contact portion 137a. When the weight body 110 advances and abuts against the contact portion 137a, the impact force during contact is absorbed by the flexing of the elastic sheets, reducing contact noise. This force is transmitted via connector 137 to clamp 131 and core storage member 134, causing clamp 131 and core storage member 134 to advance. The pen refill 108 stored in core storage member 134 is held by clamp 131 and delivered forward.

[0080] The connector 133 is formed in a ring shape and is clamped and fixed to the shaft cylinder 102 by the front end of the front shaft 121 and the inner section of the pen tip 123 that is screwed into the front shaft 121. In addition, an elastic body 135 is provided between the inner section of the connector 133 and the front end of the core storage component 134. By the elastic force of the elastic body 135, the clamp 131, the connector 137, and the core storage component 134 are springed backward relative to the connector 133 and the shaft cylinder 102.

[0081] The diameter of the rear part of the rear connecting cylinder 136 is larger than the diameter of the front part, and the inner circumference is formed into a funnel shape that slopes towards the center. It is configured such that the front end of the operating body 104 abuts against the rear end of the rear connecting cylinder.

[0082] The weight body 110 is made of stainless steel and is cylindrical in shape. It fits between the outer periphery of the core housing 134 and the inner periphery of the shaft cylinder 102 with a gap. When the weight body 110 moves forward, it abuts against the abutting portion 137a of the connector 137. When the weight body 110 moves backward, it abuts against the protrusion 102f of the shaft cylinder 102.

[0083] The operating body 104 has a cylindrical operating body 141, a cylindrical front tube 142 that is pressed into or extends beyond the front outer periphery of the operating body 141, and a tail cap 143 that is pressed into or extends beyond the rear inner periphery 104c of the operating body 141.

[0084] A scraping component (handwriting alteration component) 105, having a cylindrical eraser shape, is detachably mounted on the inner periphery 104a of the front part of the operating body 141. The scraping component 105 is mounted protruding forward from the front end of the operating body 104, and a protrusion 105a of the scraping component 105 is formed at the front of the operating body 104. Furthermore, a rear section 104d is formed at the rear of the operating body 104 (tail cap 143) that can abut against the limiting portion 102d of the shaft cylinder 102 when the operating body 104 is mounted upside down on the shaft cylinder 102.

[0085] A magnet 106, composed of a permanent magnet 15, is pressed into or fitted over the central inner circumference 104b of the aforementioned operating body 104 (operating main body 141). The axial length of the magnet 106 is formed to be approximately the same as the axial length of the cylindrical body 107 (strong magnetic body). Furthermore, as... Figure 8 As shown, the magnet 106 in this embodiment is formed such that, when viewed in cross-section, one half is the N pole 106a, and the remaining half is the S pole 106b. Therefore, the magnet 106 described above... Figure 8 A strong magnetic field is generated in the direction of the arrow.

[0086] A circumferential protrusion 104e is formed on the central outer periphery of the operating body 104 (operating body 141), protruding outward and extending circumferentially. The circumferential protrusion 104e is formed to be located approximately at the center of the magnet 106 in the axial direction. Through this circumferential protrusion 104e, when the operating body 104 slides back and forth relative to the shaft cylinder 102 and is loaded and unloaded, even if the operating body 104 vibrates in the radial direction, the inner surface of the cylindrical body 107 or the shaft cylinder 102 will not come into surface contact with the outer surface of the operating body 104, the contact area is reduced, and thus the contact resistance during movement can be reduced.

[0087] As described above, the operating body 104 is mounted to the mounting port 109 of the shaft cylinder 102 in a manner that allows for easy loading and unloading and free sliding along the axial direction. During installation, the operating body 104 is attracted to the cylindrical body 107 (a strongly magnetic body) by the magnetic force of the magnet 106. At this time, the magnetic force of the magnet 106 is... Figure 8The arrow direction, i.e., the axial direction, acts strongly, and the axial lengths of the magnet 106 and the cylindrical body 107 (strong magnetic body) are formed to be approximately the same. Thus, the magnet 106 is stably fixed by magnetic force at a position approximately the same axially as the cylindrical body 107 (strong magnetic body). Furthermore, when the operating body 104 is mounted on the shaft cylinder 102, a gap is formed between the front end of the operating body 104 (front cylinder 142) and the rear end of the core delivery mechanism 103 (rear connecting cylinder 136). Additionally, when the operating body is pressed forward, the front part of the advancing operating body 104 (front cylinder 142) abuts against the rear end of the core delivery mechanism 103 (rear connecting cylinder 136), thus, by pressing the operating body 104 forward, the core delivery mechanism 103 (rear connecting cylinder 136) can be pressed forward. At this time, the protrusion 105a of the scraping member 105 is inserted into the rear inner hole of the core delivery mechanism 103 (rear connecting cylinder 136), but the scraping member 105 does not abut against the core delivery mechanism 103 (rear connecting cylinder 136).

[0088] The scraping component 105 consists of a rubber 151 and a cover 152. The rubber 151 is made of synthetic rubber, and the cover 152 is pressed into and fitted into the outer periphery of the rubber 151. When the scraping component 105 is installed on the front inner periphery 104a of the operating body 104, the outer section of the cover 152 abuts against the front end of the operating body 104, thus preventing it from going deeper or even sinking in, forming a protrusion 105a.

[0089] Next, use Figure 7 and Figure 10 The state in which the pen tip 108 is ejected from the front opening 102b of the cylinder 102 (pen tip 123) by advancing the operating body 104 will be described. Figure 7When the operating body 104 is pressed forward, it moves forward against the magnetic force acting between the magnet 106 and the cylindrical body 107. Then, the front part of the advancing operating body 104 abuts against the rear end of the rear connecting cylinder 136 and is pressed forward. The core storage component 134, connector 137, and clamp 131 connected to the rear connecting cylinder 136 move forward relative to the shaft cylinder 102 and the connecting member 133 while holding the pen refill 108 against the elastic force of the elastic body 135. The pen refill 108 is then delivered from the front opening 102b of the shaft cylinder 102. At this time, as the clamp 131 moves forward, the fastener 132, which is embedded in the head 131a of the clamp 131, also moves forward. However, because the front end of the fastener 132 abuts against the inner section 102e of the shaft cylinder 102 (pen tip 123), the fastener 132 disengages from the head 131a of the clamp 131, the head 131a expands, and the pen tip 108 is released from its clamping state, stopping the forward movement of the pen tip 108. Then, when the operating body 104 is released from pressing forward, the clamp 131 retracts due to the elastic force of the elastic body 135, and the fastener 132 is once again embedded in the head 131a, so that the pen tip 108 is clamped by the clamp 131. At this time, even in the forward state, the operating body 104 is pulled backward by the magnetic force acting between the magnet 106 and the cylindrical body 107 until the axial positions of the magnet 106 and the cylindrical body 107 are aligned. Therefore, it is not necessary to use the elastic body 135 to pop the operating body 104 backward; the operating body 104 can be automatically returned to its original position by magnetic force.

[0090] Additionally, the ejection of the pen refill 108 can also be performed by swinging the cylinder back and forth. When from... Figure 7 When the cylinder 102 is held in a certain state and oscillated back and forth, the inertial force acts on the weight body 110, which is fitted inside the cylinder 102 with a gap, causing it to slide back and forth. When the weight body 110, which moves forward due to the inertial force, comes into contact with the abutment portion 137a of the connector 137, the connector 137 can move forward together with the clamp 131 and the core storage component 134, thereby enabling the pen core 108 to be delivered forward in the same way as when the operating body 104 is moved forward. In addition, when the cylinder 102 is oscillated back and forth, the operating body 104 is fixed by the magnetic force acting between the magnet 106 and the cylindrical body 107 (strong magnetic body), and the operating body 104 does not come into contact with the core delivery mechanism 103.

[0091] Next, the state of removing the operating body 104 from the shaft cylinder 102 and reinstalling it in the shaft cylinder 102 will be described. The rocking-out mechanical pencil 101 of this embodiment... Figure 7 The operating body 104 is held in the state shown, and against the magnetic force acting between the magnet 106 and the cylindrical body 107 (a strongly magnetic body), the operating body 104 is pulled backward, thereby... Figure 11As shown, the operating body 104 can be pulled out from the cylinder 102. At this time, the scraping member 105 is pulled out together with the operating body 104 and exposed to the outside. Therefore, the operating body 104 can be used as a grip to hold the pen firmly, and the writing on the lead 108 can be removed from the writing surface by wiping it off with the scraping member 105 (eraser 151). In addition, with the operating body 104 removed from the cylinder 102, the rear opening of the rear connecting cylinder 136 allows for the insertion of a refill pen lead into the cylinder 102 through the rear opening 102c of the cylinder 102. The refill pen lead can then be replenished from the funnel-shaped rear inner periphery of the rear connecting cylinder 136 to the lead storage member 134. Then, when the removed operating body 104 is brought close to the mounting port 109 of the shaft cylinder 102 from the scraping member 105, the operating body 104 is attracted into the shaft cylinder 102 by the magnetic force of the magnet 106 and adsorbed thereon. Figure 7 The position of the state. During this installation, the rear end of the refill delivery mechanism 103 (rear connecting cylinder 136) does not abut against the front end of the operating body 104 (front cylinder 142), and the rear connecting cylinder 136 is not pressed by the operating body 104. Therefore, it is possible to prevent the refill delivery mechanism 103 from malfunctioning and unintentionally delivering the pen refill 108.

[0092] Furthermore, in this embodiment, in such Figure 11 When the operating body 104 is reinstalled onto the shaft cylinder 102 from its pulled-out state, it can be installed onto the shaft cylinder 102 even if the front-to-back orientation of the operating body 104 is reversed. When the operating body 104 is reversed and approached from the rear end (tail cover 143) side to the mounting port 109 of the shaft cylinder 102, similarly to installation from the scraping member 105 side, the operating body 104 is attracted to the cylindrical body 107 (strongly magnetic body) of the shaft cylinder 102 by the magnetic force of the magnet 106, thus becoming... Figure 12 The installation status. In this Figure 12 In the state where the limiting portion 102d of the shaft cylinder 102 abuts against the rear section 104d of the operating body 104 and the protrusion 105a of the scraping member 105 protrudes rearward from the rear end opening 102c of the shaft cylinder 102, the operating body 104 is mounted on the shaft cylinder 102. Therefore, in Figure 12 When scraping the ink marks on the pen tip 108 with the scraping member 105 (eraser 151) in the in the desired state, the scraping action can be performed by holding the shaft 102. Since the shaft diameter of the shaft 102 is larger than that of the operating body 104, it is easier to apply force compared to scraping by gripping the operating body 104. Therefore, the scraping action can be performed easily to remove the ink marks. Furthermore, in Figure 12In the current state, the rear section 104d of the operating body 104 abuts against the limiting part 102d of the shaft cylinder 102, thus preventing the ejection of the pen refill 108 by pressing the operating body 104 forward. However, by swinging the shaft cylinder 102 back and forth, the generated inertial force propels the weight body 110 forward, thereby enabling the clamp 131 to advance via the connector 137 and eject the pen refill 108, thus further improving convenience.

[0093] In this embodiment, the material constituting the above-mentioned cylindrical body (strong magnetic body) 107 is a material that is attracted by the magnetic force of the magnet 106. It is preferable to use a substance that is strongly magnetized by a magnetic field and leaves a magnetized residue even after the magnetic field is removed. Examples include iron, cobalt, nickel and their alloys, ferrites, etc.

[0094] The shake-out mechanical pencil 101 of this embodiment uses a magnet 106 to achieve a simple mounting structure of the operating body 104 relative to the cylinder 102, and makes it easy to expose and use the scraping member 105 (eraser 151) housed inside the cylinder 102.

[0095] In this embodiment, the scraping member 105 is exemplified as an eraser made of synthetic rubber for removing the lead of a mechanical pencil. However, this embodiment is not limited to this. For example, an elastic friction body can also be used, which uses the frictional heat generated by scraping to cause the ink produced by a thermochromic solid core to change from colored to colorless and from colored to colored. In addition, the elastic material constituting the above-mentioned friction body is preferably an elastic synthetic resin (rubber, elastomer), such as silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorinated resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene monomer (EPDM) rubber, etc.

[0096] [1] The push-type writing instrument (shake-out mechanical pencil) 101 of this embodiment is provided with a lead delivery mechanism 103 inside the cylinder 102. The lead delivery mechanism 103 includes: a clamp 131 that holds the lead 108; a lead storage member 134 that is cylindrical and stores the lead 108; and a weight 110 that is mounted on the lead storage member 134 in a manner that allows it to slide freely back and forth along the axial direction. An operating body 104 for operating the lead delivery mechanism 103 is located behind the lead storage member 134. The weight moves by pressing the operating body 104 forward or by the inertial force that causes the cylinder 102 to swing back and forth. 110 moves the clamp 131 forward, causing the core delivery mechanism 103 to operate and deliver the pen core 108 from the front opening 102b of the cylinder 102. The operating body 104 is mounted on the cylinder 102 in a manner that allows it to slide back and forth freely and be easily installed and removed by magnetic force. The operating body 104 has a scraping member 105 that is locked at the front of the operating body 104. The scraping member 105 is used to remove the writing or heat-discolor the pen core 108. The operating body 104 is configured such that when not in operation, the operating body 104 is separated from the core storage member 134, and when in operation, it can abut against the rear end of the core storage member 134.

[0097] According to this press-type writing instrument 101, the operating body 104, which operates the lead delivery mechanism 103 for dispensing the writing lead 108, is magnetically attached to the cylinder 102 in a sliding and detachable manner. The lead storage component 134 of the lead delivery mechanism 103 is installed separately from the operating body 104. Therefore, during installation, the operating body 104 will not press the lead storage component 134 to operate the mechanism, thus preventing the lead delivery mechanism 103 from unintentionally dispensing the lead 108. In addition, since the operating body 104 is magnetically attached to the cylinder 102 in a detachable manner, there is no need for a locking or pressing structure relative to the operating mechanism. There is no need for a complex structure. The operating body 104 can be automatically attached by magnetic force simply by bringing it close to the cylinder 102. Furthermore, it is possible to prevent the operating body 104 from being installed incompletely on the cylinder 102. Furthermore, since the scraping member 105 is fixed to the front part of the operating body 104, the scraping member 105 can be easily exposed to the outside by removing the operating body 104 from the shaft sleeve 102. The scraping member 105 will not be soiled by hand oil or the like when the operating body 104 is held. Because it can be held firmly, it is easy to apply force when using the scraping member 105 to perform a scraping action to remove writing or to heat-discolor the writing.

[0098] In addition, the operating body 104 is magnetically fixed to the shaft cylinder 102 when the core storage component 134 is separated from the operating body 104. Therefore, the weight of the operating body 104 can be prevented from being transmitted to the clamp 131 through the core storage component 134, thereby preventing the clamping force of the clamp 131 on the pen core 108 from being affected.

[0099] In this embodiment, the lead 108 is not particularly limited as long as it can be stored in a mechanical pencil and can be dispensed and used for writing. It is preferable to use a lead that can be removed from the writing surface by scratching the writing, a colored solid lead, or a thermochromic solid lead that changes color from colored to colored or from colored to colorless by heating the writing.

[0100] The scraping component 105 in this embodiment can be an eraser made of synthetic rubber that removes ink marks produced by a lead core or a colored solid core by scraping, or a friction body made of an elastic material that changes color from colored to colored or from colored to colorless by heat when scraping ink marks produced by a thermochromic solid core. Furthermore, the elastic material constituting the friction body is preferably an elastic synthetic resin (rubber, elastomer), such as silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorinated resins, chloroprene resins, nitrile resins, polyester resins, ethylene propylene diene monomer (EPDM), etc.

[0101] [2] The push-type writing instrument (shake-out mechanical pencil) 101 of this embodiment is the push-type writing instrument (shake-out mechanical pencil) 101 described in [1], which has a magnet 106 in either the cylinder 102 or the operating body 104, and a strong magnetic body 107 that is attracted by the magnetic force of the magnet 106 in the other.

[0102] According to this press-type writing instrument 101, the magnetic field generated by the magnet 106 of either the cylinder 102 or the operating body 104 attracts the strong magnetic body 107 of the other, thus allowing the operating body 104 to be fixed relative to the cylinder 102 by magnetic force without using a pressing or locking mechanism. Furthermore, when installing the operating body 104 onto the cylinder 102 by magnetic force, it is preferable to adjust the magnetic force, magnetic field, shape, and distance between the magnet 106 and the strong magnetic body 107 to stabilize the axial position of the operating body 104 relative to the cylinder 102. Therefore, when installing the operating body 104 onto the cylinder 102, it is possible to prevent malfunction of the operating mechanism due to the operating body 104 pressing the operating mechanism forward, and it is possible to reliably separate the operating body 104 from the core storage component 134 of the operating mechanism for installation.

[0103] In addition, the strong magnetic material 107 in this embodiment refers to a substance that is strongly magnetized by a magnetic field and remains magnetized even after the magnetic field is removed, such as iron, cobalt, nickel and their alloys, ferrites, etc.

[0104] Alternatively, the delivery mechanism can be configured such that when the operating body 104 is operated, the distance between the magnet 106 and the strong magnetic body 107 increases to its maximum due to the forward movement of the operating body 104. In this case, the operating body 104 can be returned to its previous position simply by the magnetic force acting between the magnet 106 and the strong magnetic body 107. Even if the operating body 104 is moved forward by pressing or the like, the operating body 104 will return to its original position by the magnetic force. Therefore, it is not necessary to apply force to the operating body 104 with a compression spring such as a coil spring, which simplifies the installation structure of the operating body 104 and reduces costs.

[0105] [3] The push-type writing instrument (shake-out mechanical pencil) 101 of this embodiment is the push-type writing instrument (shake-out mechanical pencil) 101 described in [1] or [2]. When the operating body 104 is removed from the shaft cylinder 102, even if the front and back directions of the operating body 104 are reversed, it can be installed on the shaft cylinder 102 in a way that is easy to install and remove by magnetic force.

[0106] [4] The push-type writing instrument (shake-out mechanical pencil) 101 of this embodiment is the push-type writing instrument (shake-out mechanical pencil) 101 described in [3]. When the operating body 104 is installed on the shaft cylinder 102 in a front-back inverted manner, at least a portion of the scraping member 105 that is locked to the operating body 104 protrudes outward from the shaft cylinder 102.

[0107] According to this press-type writing instrument 101, the scraping member 105, which is configured to be locked to the operating body 104, protrudes rearward from the rear end of the shaft cylinder 102, which can prevent the loss or damage of the removed operating body 104, and can hold the shaft cylinder 102 to perform the operation when using the scraping member 105 to remove or discolor the ink. Therefore, it is preferred because it is firmly held by grasping the shaft cylinder 102, which is at least thicker than the operating body 104, and it is easy to apply force.

[0108] [5] The push-type writing instrument (shake-out mechanical pencil) 101 of this embodiment is the push-type writing instrument (shake-out mechanical pencil) 101 described in [3] or [4]. When the operating body 104 is installed on the shaft cylinder 102 with the front and back reversed, the operating body 104 abuts against the limiting part 102d that restricts the forward movement of the operating body 104.

[0109] According to such a press-type writing instrument 101, even when force is applied when using the scraping member 105, it is possible to prevent the scraping member 105 from advancing along with the operating body 104 and sinking into the shaft cylinder 102, so that further force can be applied when using the scraping member 105.

[0110] This embodiment provides a simple structure for mounting the operating body 104 relative to the cylinder 102, and allows the scraping component 105 housed inside the cylinder 102 to be easily exposed for use as a press-type writing instrument (shake-out mechanical pencil) 101.

[0111] (Third implementation method)

[0112] Figures 13 to 19 A third embodiment of the present invention is shown. Figure 13 This is a longitudinal sectional view showing the thermochromic writing instrument of this embodiment when not in use. Figure 14 yes Figure 13 Enlarged sectional view of the CC line, Figure 15 This is an exploded view of the second operating body in this embodiment. Figure 16 From Figure 13 The longitudinal sectional view of the state in which the second operating body moves forward. Figure 17 This is a longitudinal sectional view showing the usage of this embodiment. Figure 16 The diagram shows the state that causes the second operator to retreat. Figure 18 It is used to explain from Figure 13 The diagram illustrates the state after the second operating unit has been removed. Figure 19 It shows from Figure 13 A longitudinal sectional view of the state in which the second operating body is removed and installed upside down.

[0113] The thermochromic writing instrument 201 of this embodiment includes: a barrel 202; a writing body 203 housed within the barrel 202; a first operating body 204 protruding radially outward from the outer surface of the barrel 202; and an access mechanism that allows the tip 231 of the writing body 203 to freely enter and exit the front end hole 227 of the barrel 202 by sliding the first operating body 204 forward.

[0114] The writing body 203 is composed of a pen tip 231, an ink collection tube 232 in which the pen tip 231 is pressed and fixed at the front opening, a thermochromic ink filled in the ink collection tube 232, and a follower (e.g., a high-viscosity fluid) filled at the rear end of the thermochromic ink and moving forward as the thermochromic ink is consumed.

[0115] The pen tip 231 can be, for example, a structure consisting solely of a metal ballpoint pen tip that rotatably holds the ball at its front end, or a structure consisting of a synthetic resin pen tip retainer that holds the rear outer surface of the aforementioned ballpoint pen tip. Furthermore, a plug 233 with a vent hole allowing airflow between the ink reservoir 232 and the outside is installed at the rear opening of the ink reservoir 232. Inside the pen tip 231 is a spring that presses the ball at the front end forward. This spring has a rod-like structure at the front end of a compression coil spring, the front end of which contacts the rear surface of the ball. When not writing, the force applied forward by the spring ensures that the ball is in close contact with the inner surface of the inwardly facing front edge of the ballpoint pen tip, preventing ink leakage from the front of the pen tip 231 and preventing ink evaporation.

[0116] The shaft cylinder 202 comprises a pointed cylindrical front shaft 221, a cylindrical central shaft 222 threaded to the rear of the front shaft, and a cylindrical rear shaft 223 connected to the rear end of the central shaft 222. A sliding hole 224 extending in the front-rear direction and penetrating radially is formed on the rear sidewall 229 of the shaft cylinder 202 (the sidewalls of the central shaft 222 and the rear shaft 223). A cam portion 226 is integrally formed on the inner surface of the shaft cylinder 202 (central shaft 222), and an inwardly protruding, stepped limiting portion 228 is formed on the inner surface of the rear shaft 223 behind the cam portion 226.

[0117] A rear opening 225 is formed at the rear end of the shaft cylinder 202 (the rear end of the rear shaft 223). A cylindrical body 209 made of a strongly magnetic material is pressed into or fits over the rear opening 225. Thus, the cylindrical body 209 is fixed relative to the shaft cylinder 202, forming a mounting port 210 formed by the cylindrical body 209 and the inner periphery of the rear shaft 223. The second operating body 205, described later, is detachably mounted in the mounting port 210 and can slide freely back and forth.

[0118] The first operating body 204 comprises an operating portion 241 protruding outward from a sliding hole 224 in a shaft cylinder 202, a base 242 integrally connected to the operating portion 241, a shaft portion 243 integrally connected to the base 242 and extending forward from the base 242, and a rear hole 244 extending forward from the rear end of the base 242. The first operating body 204 is formed by molding a synthetic resin (e.g., polycarbonate resin). At the front end of the shaft portion 243, a cam tooth is formed to engage with the rotating member 207 by integral or other component mounting. The rear hole 244 is formed to allow the insertion of a friction body 206 (described later), with the front end of the friction body 206 abutting against the bottom 245 of the rear hole 244.

[0119] The second operating body 205 has a cylindrical operating body 251 and a tail cap 252 that is pressed into or extends beyond the rear inner periphery 255 of the operating body 251. A friction body 206 made of elastic material is locked to the front inner periphery 253 of the operating body 251 by pressing into or extending beyond it. The friction body 206 protrudes forward from the front end of the second operating body 205, and a protrusion 261 of the friction body 206 is formed at the front of the second operating body 205, with the top of the protrusion 261 being formed into a convex curved surface. In addition, a rear section 256 is formed at the rear of the second operating body 205 (tail cap 252), which can abut against the limiting part 228 of the shaft cylinder 202 when the second operating body 205 is mounted upside down on the shaft cylinder 202.

[0120] A magnet 208, made of permanent magnet, is pressed into or fitted over the central inner circumference 254 of the second operating body 205 (operating body 251). The axial length of the magnet 208 is formed to be approximately the same as the axial length of the cylindrical body 209 (strong magnetic body). Additionally, as... Figure 14 As shown, the magnet 208 of this embodiment is formed such that, when viewed in cross-section, one half is the N pole 281 and the remaining half is the S pole 282. Therefore, the magnet 208... Figure 14 A strong magnetic field is generated in the direction of the arrow.

[0121] As described above, the second operating body 205 is mounted to the mounting port 210 of the shaft cylinder 202 in a manner that allows for easy loading and unloading and free sliding along the axial direction. During installation, the second operating body 205 is attracted to the cylindrical body 209 (a strongly magnetic body) by the magnetic force of the magnet 208. At this time, the magnetic force of the magnet 208 is... Figure 14 The arrow direction, i.e., the axial direction, acts strongly, and the axial lengths of the magnet 208 and the cylindrical body 209 (strong magnetic body) are formed to be approximately the same length. Thus, the magnet 208 is stably fixed by magnetic force at a position approximately the same axially as the cylindrical body 209 (strong magnetic body). Meanwhile, the friction body 206, which is engaged with the second operating body 205, is inserted into the rear hole 244 of the first operating body 204, and the front end of the friction body 206 abuts against the bottom 245. The rear end of the second operating body 205 protrudes rearward from the rear opening 225 of the shaft cylinder 202. Therefore, by pressing the second operating body 205 forward, the first operating body 204 can be pressed forward.

[0122] The ejection mechanism is a side-sliding ejection mechanism using a rotary cam mechanism. The ejection mechanism includes: a cam portion 226 formed on the inner surface of the rear shaft 223; a rotating member 207 engaged with the cam portion 226 and abutting against the rear end of the writing body 203; a first operating body 204 engaged with the rotating member 207 and protruding radially outward beyond the sliding hole 224; a second operating body 205 protruding rearward from the rear end opening 225 of the shaft cylinder 202; and an elastic body 211 (e.g., a compression coil spring) housed within the shaft cylinder 202 and applying a rearward force to the writing body 203. In this embodiment, the ejection mechanism is a double-pressing type, where either the first operating body 204 slides forward or the second operating body 205 presses forward during either the pen tip protrusion operation or the pen tip insertion operation.

[0123] When from Figure 13 When the pen tip is in the submerged state, the magnetic force of the antimagnet 208 and the rearward force of the elastic body 211 press the second operating body 205 forward. At this time, the first operating body 204, which abuts against the friction body 206, is pressed forward. The first operating body 204 then presses the rotating component 207 forward, which in turn presses the rear end of the writing body 203 forward, causing the pen tip 231 to protrude forward and outward from the front end hole 227. At this time, the rotating component 207 engages with the cam portion 226, thus maintaining the protruding state of the pen tip. Figure 16 The second operating body 205 is then attracted by the magnetic force of the magnet 208 to the cylindrical body (strong magnetic body) and retracts to the position before pressing, becoming... Figure 17 Thus, the thermochromic writing instrument 201 becomes usable (writable).

[0124] Next, when from Figure 17When the pen tip protrudes and presses against the magnetic force of the antimagnet 208 to push the second operating body 205 forward, the front end of the friction body 206 fixed to the advancing second operating body 205 abuts against the bottom of the first operating body 204, causing the first operating body 204 to advance. Then, the advancing first operating body 204 causes the rotating component 207 to advance, disengaging the cam portion 226 from the rotating cam of the rotating component 207, causing the rotating component 207 to move backward. Simultaneously, the writing body 203, the first operating body 204, and the second operating body 205 move backward, resulting in the pen tip being submerged. Thus, the thermochromic writing instrument 201 becomes unused (both writing and friction body are unused). Furthermore, when the writing body 203, the first operating body 204, and the second operating body 205 move backward, the second operating body 205 is attracted to the cylindrical body 209 (a strongly magnetic body) by the magnetic force of the magnet 208, thereby stopping its backward movement. Therefore, the impact force generated when the backward movement stops is mitigated, and the friction body 206, made of an elastic body, which holds the first operating body 204 to the second operating body 205, absorbs the impact. Thus, the impact force applied to the writing body 203 is reduced. In particular, in the structure where the pen tip of the writing body 203 holds the ballpoint pen as in this embodiment, if the writing body 203 is subjected to a strong impact when it retracts, the ballpoint pen retracts, and air is drawn in between the ballpoint pen tip and the ballpoint pen tip, potentially hindering the expulsion of internal ink during writing. Therefore, this method is particularly effective.

[0125] Furthermore, the forward movement of the writing surface 203 can also be achieved by simply sliding the first operating body 204 forward, without needing to operate the second operating body 205. Therefore, the user can send out the writing surface by operating either the first operating body 204 or the second operating body 205, thus transitioning from a non-use state to a use state, which is highly convenient.

[0126] Next, the state of removing the second operating body 205 from the shaft cylinder 202 and reinstalling it in the shaft cylinder 202 will be described. The thermochromic writing instrument 201 of this embodiment... Figure 13 The second operating body 205 is held in the state shown and pulled backward against the magnetic force acting between the magnet 208 and the cylindrical body 209 (strong magnetic body), thereby... Figure 18As shown, the second operating body 205 can be pulled out from the shaft cylinder 202. At this time, the friction body 206 is pulled out together with the second operating body 205 and exposed to the outside. Therefore, the second operating body 205 becomes a holding part, allowing for a secure grip. By using the friction body 206 to wipe away the ink marks produced by the thermochromic ink on the writing surface, frictional heat is generated, causing the ink marks to change color. Furthermore, when the removed second operating body 205 is brought close to the mounting port 210 of the shaft cylinder from the friction body 206, the magnetic force of the magnet 208 attracts the second operating body 205 into the shaft cylinder, where it is adsorbed onto the original... Figure 13 The position of the state.

[0127] Furthermore, in this embodiment, in such Figure 18 When the second operating body 205 is reinstalled onto the shaft cylinder 202 from its pulled-out state, it can be installed onto the shaft cylinder 202 even if its front-to-back orientation is reversed. When the second operating body 205 is reversed and approached from the rear end side to the mounting port 210 of the shaft cylinder 202, similar to installation from the friction body 206 side, the second operating body 205 is attracted to the cylindrical body 209 (a strongly magnetic body) by the magnetic force of the magnet 208, thus becoming installed on the shaft cylinder 202. Figure 19 The state. In this Figure 19 In this state, the second operating body 205 is mounted on the shaft cylinder 202 with the limiting part 228 of the shaft cylinder abutting against the rear section 256 of the second operating body 205 and the friction body 206 protruding rearward from the rear end opening 225 of the shaft cylinder 202. Therefore, when in Figure 19 When scraping the ink marks produced by thermochromic ink with the friction body 206 in the current state, the scraping action can be performed by holding the shaft 202. Since the shaft diameter of the shaft 202 is larger than that of the second operating body 205, it is easier to apply force compared to scraping by holding the second operating body 205. Moreover, the scraping action can be performed easily, and the ink marks can be thermochromic using frictional heat. In addition, in this embodiment, even when the second operating body 205 is installed upside down, the pen tip 231 of the writing body 203 can be inserted and removed by sliding the first operating body 204 along the axial direction, thus further improving convenience.

[0128] In this embodiment, the elastic material constituting the friction body 206 is preferably an elastic synthetic resin (rubber, elastomer), such as silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorinated resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene monomer (EPDM), etc. The elastic synthetic resin constituting the friction body 206 is not a highly abrasive elastic material (e.g., rubber), but a low-abrasion elastic material that produces almost no wear residue (rubber residue) during friction. In addition, the friction body 206 only needs to be provided at least on the outer surface of the front end of the second operating body 205. For example, a structure in which the friction body 206 made of elastic material is locked (fixed) to the outer surface of the front end of the second operating body 205 by pressing, snapping, screwing, fitting, bonding, two-color molding, etc., can be used, or a structure in which the second operating body 205, except for the magnet 208, is integrally formed of elastic material.

[0129] In this embodiment, the material constituting the cylindrical body 209 (strong magnetic body) is a material that is attracted by the magnetic force of the magnet 208. Preferably, a material that is strongly magnetized by a magnetic field and remains magnetized even after the magnetic field is removed is used. Examples include iron, cobalt, nickel and their alloys, ferrites, etc.

[0130] The press-type writing instrument (thermochromic writing instrument) 201 of this embodiment can store the friction body 206 in the shaft cylinder 202 when needed, and can be easily removed from the shaft cylinder together with the second operating body 205 which is attracted by magnetic force to perform a scraping action. Therefore, it can prevent the friction body 206 from being contaminated and has high convenience.

[0131] [1] The press-type writing instrument (thermochromic writing instrument) 201 of this embodiment is configured such that: a writing body 203 is housed inside the shaft cylinder 202 in a manner that allows it to move in the front-back direction; thermochromic ink is housed inside the writing body 203; a pen tip 231 capable of discharging thermochromic ink is provided at the front end of the writing body 203; a first operating body 204 capable of moving in the front-back direction protrudes towards the side wall 229 of the shaft cylinder 202; and the pen tip 231 of the writing body 203 can be discharging from the front of the shaft cylinder 202 by sliding the first operating body 204 forward. The end hole has an inlet and outlet. Inside the shaft cylinder 202, a friction body 206 is housed. The friction body 206 is made of a low-abrasion elastic material that can cause the ink to change color due to the frictional heat generated when the ink is applied. At least a portion of the writing body 203 protrudes from the rear end of the shaft cylinder 202. The second operating body 205 can operate the first operating body 204. The second operating body 205 has the friction body 206 at its front end and is mounted on the shaft cylinder 202 by magnetic force in a manner that allows it to slide back and forth along the axial direction and can be detached.

[0132] According to this press-type writing instrument 201, a friction element 206 is provided at the front of the second operating body 205. The friction element 206 is housed inside the shaft cylinder 202. Therefore, regardless of whether the pen tip 231 is inserted or removed, contact with the user's fingertip and contact between the friction element 206 and the inner surface of the storage body (e.g., the inner surface of a pen case, the bottom of a pen holder, or the inner surface of a clothing pocket) can be avoided, thus preventing dirt, dust, etc. from adhering to the friction element 206 (i.e., the friction element 206 from becoming dirty). In addition, the second operating body 205 is magnetically attached to the shaft cylinder 202 in a way that allows for easy attachment and removal. Therefore, there is no need for a locking or pressing structure relative to the shaft cylinder 202; the second operating body 205 can be automatically attached to the shaft cylinder 202 by magnetic force simply by bringing it close to the shaft cylinder 202. Therefore, the second operating body 205 can be easily attached to and removed from the shaft cylinder 202. Furthermore, since the friction body 206 is located at the front of the second operating body 205, the friction body 206 can be easily exposed to the outside by removing the second operating body 205 from the shaft sleeve 202. The friction body 206 will not be soiled by hand dirt or hand oil by holding the operating body. The ability to hold it firmly has the following effect: it is easy to apply force when using the friction body 206 to perform a scraping action to heat-change the ink color by utilizing the frictional heat generated by friction.

[0133] Furthermore, in the press-type writing instrument 201 of this embodiment, by operating the second operating body 205 protruding from the rear end of the shaft cylinder 202, the first operating body 204 can be indirectly operated, causing the pen tip 231 of the writing body 203 to protrude from the front end hole of the shaft cylinder 202. The user can choose to use either the first operating body 204 protruding from the side wall 229 of the shaft cylinder 202 or the second operating body 205 protruding from the rear end of the shaft cylinder 202 to perform the writing body 203 delivery operation, thus providing high convenience.

[0134] Furthermore, in this embodiment, the elastic material constituting the friction body 206 is preferably an elastic synthetic resin (rubber, elastomer), such as silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorinated resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene monomer (EPDM), etc. The elastic synthetic resin constituting the friction body 206 is not a highly abrasive elastic material (e.g., rubber), but a low-abrasion elastic material that produces almost no wear residue (rubber residue) during friction.

[0135] [2] The press-type writing instrument (thermochromic writing instrument) 201 of this embodiment is the press-type writing instrument (thermochromic writing instrument) 201 described in [1], which has a magnet 208 in either the shaft cylinder 202 or the second operating body 205, and a strong magnetic body 209 that is attracted to the magnet 208 in the other.

[0136] According to this press-type writing instrument 201, the magnetic field generated by the magnet 208 of either the cylinder 202 or the second operating body 205 attracts the strong magnetic body 209 of the other. Therefore, the second operating body 205 can be magnetically attracted to the cylinder 202 without using a pressing or locking mechanism. Furthermore, when installing the second operating body 205 onto the cylinder 202 using magnetic force, it is preferable to adjust the magnetic force, magnetic field, shape, and distance between the magnet 208 and the strong magnetic body 209 to stabilize the axial position of the second operating body 205 relative to the cylinder 202. Thus, when installing the second operating body 205 onto the cylinder 202, it is possible to prevent the pen tip 231 from being accidentally ejected due to the second operating body 205 pressing the first operating body 204 forward.

[0137] Furthermore, the strong magnetic material 209 in this embodiment is attracted by the magnetic force of the magnet 208. This refers to a substance that is strongly magnetized by a magnetic field and remains magnetized even after the magnetic field is removed. Examples of such substances include iron, cobalt, nickel and their alloys, ferrites, etc.

[0138] Alternatively, the first operating body 204 can be operated by operating the second operating body 205. When the distance between the magnet 208 and the strong magnetic body 209 increases to its maximum due to the advancement of the second operating body 205, the operating body returns to its previous position solely by the magnetic force acting between the magnet 208 and the strong magnetic body 209. In this case, even if the second operating body 205 is advanced by pressing or the like, it returns to its original position by magnetic force. Therefore, it is not necessary to apply force to the second operating body 205 using a compression spring such as a coil spring, which simplifies the structure of the operating mechanism and reduces costs. Furthermore, even when the writing body 203 is ejected, the second operating body 205 always returns to its original position. Therefore, when the second operating body 205 is removed from the shaft cylinder 202 for the use of the friction body 206, it will not be embedded inside the shaft cylinder 202, thus making the second operating body 205 easy to hold.

[0139] [3] The press-type writing instrument (thermochromic writing instrument) 201 of this embodiment is the press-type writing instrument (thermochromic writing instrument) 201 described in [1] or [2], which is configured such that when the second operating body 205 is removed from the shaft cylinder 202, even if the front and back directions of the second operating body 205 are reversed, the second operating body 205 can be installed on the shaft cylinder 202 in a way that is easy to install and remove by magnetic force.

[0140] [4] The press-type writing instrument (thermochromic writing instrument) 201 of this embodiment is the press-type writing instrument (thermochromic writing instrument) 201 described in [3]. When the second operating body 205 is installed on the shaft cylinder 202 in reverse order, at least a portion of the friction body 206 that is locked to the first operating body 204 protrudes outward from the shaft cylinder 202.

[0141] According to this press-type writing instrument 201, the friction body 206, which is configured to be locked to the second operating body 205, protrudes rearward from the rear end of the shaft cylinder 202, which can prevent the loss or damage of the disassembled second operating body 205, and can hold the shaft cylinder 202 to perform the operation when using the friction body 206 to heat-change the ink. Therefore, it can be firmly held by grasping the shaft cylinder 202, which is at least thicker than the second operating body 205, and it is easy to apply force, so it is preferred.

[0142] [5] The press-type writing instrument (thermochromic writing instrument) 201 of this embodiment is the press-type writing instrument (thermochromic writing instrument) 201 described in [3] or [4]. When the second operating body 205 is installed on the shaft cylinder 202 in a front-back inverted manner, the operating body abuts against the limiting part 228 that restricts the forward movement of the operating body.

[0143] According to this press-type writing instrument 201, even when force is applied when using the friction body 206, it is possible to prevent the friction body 206 from advancing together with the second operating body 205 and sinking into the shaft cylinder 202. Therefore, it is possible to apply further force when using the friction body 206, making it easy to perform a scraping action.

Claims

1. A press-type writing instrument, characterized in that, This push-button writing instrument has the following features: Shaft sleeve; The writing instrument is housed inside the shaft cylinder and has a writing section at the front end; The delivery mechanism sends the written text forward; as well as An operating body, positioned behind the delivery mechanism, operates the delivery mechanism. The press-type writing instrument has a handwriting-changing component mounted in front of the operating body, which is used to remove, heat-change, or conceal the handwriting written on the writing surface. A magnet is provided in either the shaft or the operating body, and a strongly magnetic object is provided in the other, which is attracted by the magnetic force of the magnet. At least a portion of the operating body protrudes from the shaft cylinder, and the operating body is mounted on the shaft cylinder in a manner that allows it to slide back and forth and to be detached, utilizing the magnetic force acting between the shaft cylinder and the operating body.

2. The press-type writing tool according to claim 1, characterized in that, The delivery mechanism is operated by manipulating the operating body. When the distance between the magnet and the strong magnetic body is increased to the maximum, the operating body is returned to the position before operation by using only the magnetic force between the magnet and the strong magnetic body.

3. The push-to-write tool according to claim 1 or 2, characterized in that, When the operating body is removed from the shaft cylinder, even if the front and back orientation of the operating body is reversed, the operating body can be installed onto the shaft cylinder in a way that is easy to install and remove using magnetic force.

4. The press-type writing tool according to claim 3, characterized in that, When the operating body is installed on the shaft cylinder in an inverted manner, the operating body abuts against the limiting part that restricts the forward movement of the operating body.

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