Multifunctional pen

Abstract

In a multifunctional pen in which an electromagnetic induction touch pen and a writing refill coexist as refills in a barrel, a metal part of the writing refill located at a standby position when the electromagnetic induction touch pen is used is prevented from interfering with electromagnetic induction. A multifunctional pen (1) has a plurality of refills including an electromagnetic induction touch pen (40) inside a barrel (10), and by a forward pressing action of a pressing rod (30, 35) connected to the rear ends of each of the plurality of refills, the tip of one of the plurality of refills moves from a standby position in which it stays inside the barrel (10) to a use position protruding from a top opening (12A) of the barrel (10), and at least one of the writing refills (50, 55) other than the electromagnetic induction touch pen (40) includes a metal writing tip, and the tip of the electromagnetic induction touch pen (40) located at the use position is separated from the tip of the writing refill (50, 55) located at the standby position by a distance that does not affect the electromagnetic induction of the electromagnetic induction touch pen (40).

Description

Technical Field

[0001] The invention relates to a multifunctional pen. Background Art

[0002] In recent years, pointing devices such as digitizers that perform input by physical contact on a screen have been widely used. That is, a position indicator formed in a pen shape contacts an input surface of a plate-shaped input device provided with a position detection device to detect the contact position.

[0003] There are various types of such digitizers, one of which is an electromagnetic induction type. In this electromagnetic induction type digitizer, an electromagnetic induction coil is provided in a position indicator, and the electromagnetic induction coil resonates with respect to an electromagnetic wave of a specific frequency generated by a position detection device provided under the input surface of the input device, and recognizes the position where the resonance occurs as the input device.

[0004] Such a technology is described in WO 2016 / 121478A1 and WO 2016 / 129614A1. Summary of the invention

[0005] Problem that the invention aims to solve

[0006] WO 2016 / 121478 A1 and WO 2016 / 129614 A1 disclose a so-called multifunctional pen in which a ballpoint pen core and an electromagnetic induction type electronic pen core are stored in a barrel. In such a multifunctional pen, the electronic pen core and the ballpoint pen core are switched by a pressing operation to protrude and retract relative to the top opening of the barrel.

[0007] Here, in an electromagnetic induction electronic pen core, when the electromagnetic induction coil resonates with respect to electromagnetic waves of a specific frequency as described above, if there are metal parts (for example, the tip of a ballpoint pen of a writing tool), the metal parts interfere with the magnetic field and may affect the electromagnetic induction.

[0008] Therefore, the subject of each scheme of the present invention is to prevent the metal part of the writing refill located in the standby position from affecting the electromagnetic induction when using the electromagnetic induction stylus in a multifunctional pen in which the electromagnetic induction stylus and the writing refill coexist as refills in the barrel.

[0009] Solutions for solving problems

[0010] (1) Option 1

[0011] In view of the above problems, the first solution of the present invention is a multifunctional pen, which includes a plurality of pen cores inside a barrel, and the plurality of pen cores include an electromagnetic induction touch pen as a pen core.

[0012] Furthermore, by the forward pushing action of the push rod connected to the rear ends of the plurality of pen cores, the top end of one of the plurality of pen cores is transferred from a standby position staying inside the shaft barrel to a use position protruding from the top end opening of the shaft barrel. The multifunctional pen is characterized in that:

[0013] At least one of the writing refills other than the electromagnetic induction stylus pen among the plurality of refills includes a writing tip made of metal,

[0014] The tip of the electromagnetic induction stylus located at the use position is spaced apart from the tip of the writing refill located at the standby position by a distance that does not affect the electromagnetic induction of the electromagnetic induction stylus.

[0015] Here, it is clear from the experiment conducted by the applicant that when using the electromagnetic induction stylus of the multifunctional pen, the distance between the electromagnetic induction stylus and the ballpoint pen core as the writing pen core is at least 15 mm, preferably at least 20 mm. If this distance is not kept, the electromagnetic induction is impaired. This is considered to be because the metal material used in the ballpoint pen core interferes with the ferrite core of the electromagnetic induction stylus, thereby affecting the electromagnetic induction. Therefore, it is expected that the distance that does not affect the electromagnetic induction of the electromagnetic induction stylus is at least 15 mm.

[0016] In addition, the writing refill in this scheme refers to the refill stored in the multifunctional pen other than the electromagnetic induction stylus pen, and is not limited to the writing unit in the narrow sense that adds the line on the paper (for example, ballpoint pen, mechanical pencil, pencil refill, thermochromic refill marker, etc.), but also includes the writing unit in the broad sense in the concept, and the writing unit in the broad sense also includes the unit that eliminates the line formed by the above-mentioned writing unit (for example, eraser, friction body, etc.), and the stylus used for imaginary writing and input using the touch panel other than the electromagnetic induction method (for example, pressure-sensitive stylus, capacitive stylus). Moreover, these writing units in the broad sense are made into refills and stored in the barrel as writing refills.

[0017] In addition, regarding the pen core, the "use position" means a position where writing or input can be performed by using the pen core, and has no relation to whether writing or input is actually performed.

[0018] (2) Option 2

[0019] The multifunctional pen of the second embodiment of the present invention is based on the features of the first embodiment, and is characterized in that the shaft tube includes a guide rail for the push rod to slide along the axial direction accompanying the push action.

[0020] Furthermore, the push rod comprises:

[0021] a sliding surface that slides on the guide rail;

[0022] a pressing protrusion, which protrudes outward relative to the sliding surface and extends backwards from a rear end of the sliding surface;

[0023] A rear end locking portion, which is a step portion between the rear end of the sliding surface and the pressing protrusion, and is locked with the front end of the guide rail at the use position of the corresponding pen core;

[0024] a rear end release cam which protrudes from the vicinity of the rear end of the sliding surface in the axial direction and is located forward of the front end of the guide rail when the corresponding refill is in the use position; and

[0025] a front end release cam which protrudes in the axial direction from the sliding surface at a position forward of the rear end release cam and abuts against the rear end release cam of the push rod corresponding to the other pen core which is already in the use position when the corresponding pen core is transferred from the standby position to the use position,

[0026] The guide rail for sliding the push rod of the electromagnetic induction stylus pen is shorter than the guide rail for sliding the push rod of the writing pen core.

[0027] In the standby position of the electromagnetic induction stylus pen, the front end position of the front end release cam of the corresponding push rod is substantially consistent with the front end position of the guide rail corresponding to the writing pen core.

[0028] In the standby position of the writing pen core, the front end position of the front end release cam of the corresponding push rod is substantially consistent with the front end position of the guide rail corresponding to the electromagnetic induction stylus.

[0029] The tip of the electromagnetic induction stylus pen located at the standby position is located closer to the front end than the tip of the writing pen core also located at the standby position.

[0030] Here, the length of the guide rail corresponds to the pressing stroke of the corresponding pen core, that is, the distance required for the pen core to move from the standby position to the use position.

[0031] That is, since the guide rail for the electromagnetic induction stylus to slide is relatively short, the tip can be moved to the use position with a relatively short push stroke. On the other hand, since the total length of the writing refill is relatively short and the guide rail for the writing refill to slide is relatively long, the tip can be moved to the use position with a relatively long push stroke. Therefore, since the electromagnetic induction stylus and the writing refill have different push strokes, the user can know by feeling which refill's push rod is being operated.

[0032] In addition, the “substantially consistent” mentioned in this solution does not require strict positional consistency. Even if there is a slight positional error, as long as they are substantially consistent, it is sufficient.

[0033] (3) Scheme 3

[0034] The multifunctional pen of the third embodiment of the present invention is based on the features of the second embodiment, and is characterized in that the guide rail is formed as a step portion that is recessed in the axial direction relative to the surface of the shaft tube on both inner sides of the guide hole that is a long hole along the axial direction,

[0035] A guide groove along the axial direction is provided between the guide rails.

[0036] The rear end release cam and the front end release cam penetrate the guide groove so as to be movable in the axial direction.

[0037] Furthermore, it is desirable that the guide rail is provided in a substantially cylindrical guide tube accommodated inside the shaft tube.

[0038] (4) Scheme 4

[0039] The multifunctional pen of the fourth scheme of the present invention is based on the characteristics of the second or third scheme, and is characterized in that the shape of the push protrusion of the push rod connected to the electromagnetic induction touch pen is different from the shape of the push protrusion of the push rod connected to the writing pen core.

[0040] According to the above structure, since the shapes of the pressing protrusions of the electromagnetic induction touch pen and the writing refill are different, the user can know whether the refill to be pressed next is the electromagnetic induction touch pen simply by feeling.

[0041] (5) Scheme 5

[0042] The multifunctional pen of the fifth embodiment of the present invention is based on the features of the first, second, third or fourth embodiments, and is characterized in that the writing pen core includes a thermochromic core pen core having a thermochromic core,

[0043] Furthermore, a friction body for eliminating the drawn line formed by the thermochromic core is provided at the rear end of the rod barrel.

[0044] Effects of the Invention

[0045] According to the above-mentioned schemes, in a multifunctional pen in which an electromagnetic induction stylus and a writing refill coexist as refills in a shaft barrel, when the electromagnetic induction stylus is used, the metal part of the writing refill located in the standby position is separated from the electromagnetic induction stylus by a sufficient distance, thereby preventing interference with the electromagnetic induction. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1A The front view shows a state in which all the pen refills in the multifunctional pen according to the embodiment of the present invention are located at the standby position.

[0047] Figure 1B A side view is shown of a state in which all the pen refills in the multi-function pen according to the embodiment of the present invention are located at the standby position.

[0048] Figure 1C A state in which all the pen refills in the multi-function pen according to the embodiment of the present invention are located at the standby position is shown by a side sectional view.

[0049] Figure 2A Using stereograms Figure 1A A click stick for an electromagnetic induction stylus pen used in a multi-function pen.

[0050] Figure 2B Using the main view Figure 1A A click stick for an electromagnetic induction stylus pen used in a multi-function pen.

[0051] Figure 2C Using side view Figure 1A A click stick for an electromagnetic induction stylus pen used in a multi-function pen.

[0052] Figure 2D Rear view representation Figure 1A A click stick for an electromagnetic induction stylus pen used in a multi-function pen.

[0053] Figure 3A Using stereograms Figure 1A A push rod for a writing refill used in a multi-function pen.

[0054] Figure 3B Using the main view Figure 1A A push rod for a writing refill used in a multi-function pen.

[0055] Figure 3C Using side view Figure 1A A push rod for a writing refill used in a multi-function pen.

[0056] Figure 3D Rear view representation Figure 1A A push rod for a writing refill used in a multi-function pen.

[0057] Figure 4A Using stereograms Figure 1A A guide tube used in a multi-function pen.

[0058] Figure 4B Using the main view Figure 1A A guide tube used in a multi-function pen.

[0059] Figure 4C Rear view representation Figure 1A A guide tube used in a multi-function pen.

[0060] Figure 4D Using side cross-sectional view Figure 1A A guide tube used in a multi-function pen.

[0061] Figure 5A The electromagnetic induction touch pen in the multifunctional pen according to the embodiment of the present invention is shown in a front view when it is in a use position.

[0062] Figure 5B A side view is used to illustrate a state where the electromagnetic induction stylus pen in the multifunctional pen according to the embodiment of the present invention is located in a use position.

[0063] Figure 5C A side cross-sectional view is used to illustrate a state in which the electromagnetic induction stylus pen in the multi-function pen according to the embodiment of the present invention is located in a use position.

[0064] Fig. 6A The front view shows a state where the writing refill of the multifunctional pen according to the embodiment of the present invention is located in the use position.

[0065] Figure 6B The state where the writing refill of the multifunctional pen according to the embodiment of the present invention is located in the use position is shown in a side view.

[0066] Figure 6C The state where the writing refill of the multi-function pen according to the embodiment of the present invention is located in the use position is shown by a side cross-sectional view. DETAILED DESCRIPTION

[0067] Hereinafter, the embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the "top end" in the following description refers to the end where the writing top end of the multifunctional pen 1 is located, and the "rear end" refers to the opposite end. In addition, the "front end side" refers to the side of the "top end", and the "rear end side" refers to the side of the "rear end".

[0068] (1) Appearance

[0069] Figure 1A to Figure 1CUsing the main view ( Figure 1A )、Side view( Figure 1B ) and side cross-sectional view ( Figure 1C ) shows a situation in which all of the multiple pen cores including the electromagnetic induction touch pen 40 as the pen core in the multifunctional pen 1 according to the embodiment of the present invention are located at a standby position inside the shaft barrel 10.

[0070] The multifunctional pen 1 of this embodiment includes a shaft barrel 10 as its external structure, and the shaft barrel 10 has openings at its top and rear ends. The shaft barrel 10 is formed by screwing a rear shaft 14 located at the rear end side and a front shaft 12 located at the front end side together. In addition, a top end opening 12A is formed at the top end of the front shaft 12 (see Figure 1C ), the top end of the stored refill can protrude and retract relative to the top end opening 12A. On the other hand, a rear end opening 14B is formed at the rear end of the rear rod 14 (refer to Figure 1C ), a friction body 20A provided at the rear end of a guide tube 20 described later is exposed from the rear end opening 14B.

[0071] A total of four guide holes 14A, which are long holes along the axial direction, are evenly arranged on the rear end side of the rear rod 14. A total of three push protrusions 35A of the push rods 35 installed at the rear of the writing refills 50 and 55 and a pen clip 30I formed integrally with the push protrusion 30A of the push rod 30 installed at the rear of the electromagnetic induction touch pen 40 are exposed from each guide hole 14A. These push rods 30 and 35 can move forward and backward along the corresponding guide holes 14A.

[0072] (2) Internal structure

[0073] There are two (but not Figure 1C Only one can be seen in the cross-sectional view of FIG. 1. ) There are four refills in total, namely, a writing refill 50 as a ballpoint pen refill, a writing refill 55 as a thermochromic refill, and an electromagnetic induction stylus 40. The total length of the electromagnetic induction stylus 40 is about 7 mm longer than the total length of the other writing refills 50 and 55. Therefore, in the present embodiment, when the shaft tube 10 is in the standby position, the top of the electromagnetic induction stylus 40 is located about 7 mm closer to the front end than the top of the other writing refills 50 and 55, but the length is not limited to about 7 mm, as long as it is located close to the front end within the range where the electromagnetic induction stylus 40 functions when in use. That is, it means that, among the distances between the writing top of the electromagnetic induction stylus 40 and the writing tops of the other writing refills 50 and 55, the distance when the electromagnetic induction stylus 40 is in use is greater than the distances when the other writing refills 50 and 55 are in use.

[0074] A short cylindrical lead support cylinder 60 is installed at a position slightly behind the center of the shaft cylinder 10. A support hole 62 is passed through the lead support cylinder 60, and each lead is passed through the support hole 62 in a manner that it can move back and forth. The lead support cylinder 60 is supported by a support protrusion 16 protruding inwardly from the inner peripheral surface of the shaft cylinder 10 slightly behind the center.

[0075] (2-1) Electromagnetic induction stylus 40

[0076] like Figure 1C As shown, the electromagnetic induction touch pen 40 has a synthetic resin tip joint 40B installed at the top of a metal storage rod 40A, and the tip joint 40B has a substantially tubular core frame 40C with a rod-shaped ferrite core 40D inserted therein. For example, the synthetic resin is polypropylene or polyacetal, and a synthetic resin contact tip 40E such as polyacetal is installed at the top of the tip joint 40B. The total length of the electromagnetic induction touch pen 40 is formed to be longer than the total length of the writing pen core 50. In addition, an electromagnetic induction coil 40J is wound around the ferrite core 40D via the tip joint 40B. The pressure-sensitive sensor 40I and the capacitor 40K electrically connected to the electromagnetic induction coil 40J are stored in the storage rod 40A. In addition, a connection portion 40G for connecting to the later-described push rod 30 is installed at the rear end of the storage rod 40A via a substantially cylindrical rear end joint 40F. A push spring 40L is provided on the outer periphery of the connecting portion 40G. The push spring 40L is supported by its front end on the rear end edge of the refill support tube 60, and its rear end is supported by the spring support end 30H of the push rod 30 described later, thereby applying force to the push rod 30 rearward relative to the rod tube 10. In addition, a return spring 40H that applies force to the storage rod 40A in the front end direction is clamped between the rear end joint 40F and the connecting portion 40G. The return spring 40H is compressed when the storage rod 40A is moved rearward by pressing the top joint 40B. In addition, the return spring 40H also has the effect of preventing damage caused by falling impact, etc. In addition, the electromagnetic induction touch pen 40 is connected to the push rod 30 by the connecting portion 40G in a manner that can be loaded and unloaded relative to the push rod 30, and can be easily replaced with a new one when, for example, the contact top 40E is worn or the built-in electronic components fail.

[0077] The pressing rod 30 of the electromagnetic induction stylus 40 presents Figure 2A to Figure 2D As shown in the appearance. Figure 2A to Figure 2D Using stereograms ( Figure 2A )、Main View( Figure 2B )、Side view( Figure 2C ) and rear view ( Figure 2D ) represents the pressing rod 30 for the electromagnetic induction stylus 40. Figure 2A to Figure 2DThe "front side" in the description refers to the side from the axis of the barrel 10 toward the outer periphery, and the "back side" similarly refers to the side toward the axis of the barrel 10. The directions mentioned in the description of the push rod 30 in the item (2-1) are based on this setting.

[0078] The back surface of the push rod 30 serves as a sliding surface 30B that slides on the guide rail 26 described later (see FIG. Figure 2C On the other hand, the push protrusion 30A protrudes from the front side of the push rod 30 relative to the sliding surface 30B toward the outside of the shaft tube 10, and penetrates from the guide hole 14A of the shaft tube 10 to the outside (see Figure 1C The push protrusion 30A further extends rearward than the rear end of the sliding surface 30B (see Figure 2B and Figure 2C ). In addition, the step portion between the rear end of the sliding surface 30B and the push protrusion 30A becomes a rear end locking portion 30C that is locked with the front end of the guide rail 26 described later. Moreover, the portion of the push protrusion 30A extending toward the front end becomes a pen clip 30I. Due to the presence of the pen clip 30I, the shape of the push protrusion 30A of the push rod 30 connected to the electromagnetic induction touch pen 40 is different from the shape of the push protrusion 35A of the push rod 35 connected to the writing pen core 50, 55 described later.

[0079] A protruding structure along the axial direction is provided from the sliding surface 30B to the back side, and the protruding structure is an embedded portion 30D embedded in the guide groove 28 described later. A protruding structure is provided near the rear end of the embedded portion 30D further to the back side (the axial direction in the rod barrel 10), and the protruding structure is a rear end release cam 30E. In addition, a protruding structure is provided near the front end of the embedded portion 30D further to the back side (the axial direction in the rod barrel 10), and the protruding structure is a front end release cam 30F. That is, the rear end release cam 30E and the front end release cam 30F penetrate the guide groove 28 in a manner that can move freely along the axial direction.

[0080] A connection protrusion 30G connected to the electromagnetic induction stylus 40 is protruded from the top of the push rod 30. In addition, a step portion is formed on both sides of the front side and the back side slightly behind the connection protrusion 30G, and the step portion is a spring support end 30H that supports the rear end of the push spring 40L.

[0081] (2-2) Writing refill 50

[0082] like Figure 1CAs shown in the figure, the writing refill 50 formed as a ballpoint pen refill has a structure in which a metal ballpoint pen tip 50B as a writing tip is mounted on the top end of an ink storage tube 50A via a joint 50C. The rear end of the ink storage tube 50A is connected to the push rod 35 described later. In addition, a push spring 50D for applying force to the push rod 35 backward is provided on the outer periphery near the rear end of the ink storage tube 50A. The push spring 50D is supported by the rear end edge of the refill support tube 60 at its front end, and supported by the spring support end 35H of the push rod 35 described later, thereby applying force to the push rod 35 backward relative to the rod tube 10.

[0083] The push rod 35 of the writing pen core 50 presents Figure 3A to Figure 3D As shown in the appearance. Figure 3A to Figure 3D Using stereograms ( Figure 3A )、Main View( Figure 3B )、Side view( Figure 3C ) and rear view ( Figure 3D ) represents the push rod 35 for writing the pen core 50. Here, the Figure 3A to Figure 3D The "front side" in the description of the push rod 35 in the item (2-2) is the side from the axis of the shaft tube 10 toward the outer periphery, and the "back side" is the side toward the axis of the shaft tube 10. The direction mentioned in the description of the push rod 35 in the item (2-2) is based on the setting

[0084] The back surface of the push rod 35 serves as a sliding surface 35B that slides on the guide rail 27 described later (see FIG. Figure 3C On the other hand, the push protrusion 35A protrudes from the front side of the push rod 35 relative to the sliding surface 35B in the direction of the outside of the shaft tube 10, and penetrates from the guide hole 14A of the shaft tube 10 to the outside (see Figure 1C The push protrusion 35A further extends rearward than the rear end of the sliding surface 35B (see Figure 3B and Figure 3C ). In addition, the step portion between the rear end of the sliding surface 35B and the pressing protrusion 35A forms a rear end locking portion 35C that is locked with the front end of the guide rail 27 described later.

[0085] A protruding structure along the axial direction is provided from the sliding surface 35B to the back side, and the protruding structure is an embedded portion 35D embedded in the guide groove 28 described later. A protruding structure is provided near the rear end of the embedded portion 35D further to the back side (the axial direction in the rod barrel 10), and the protruding structure is a rear end release cam 35E. In addition, a protruding structure is provided near the front end of the embedded portion 35D further to the back side (the axial direction in the rod barrel 10), and the protruding structure is a front end release cam 35F. That is, the rear end release cam 35E and the front end release cam 35F penetrate the guide groove 28 in a manner that can move freely along the axial direction.

[0086] A connection protrusion 35G connected to the writing pen core 50 is protruded from the top end of the push rod 35. In addition, a step portion is formed on both sides of the front side and the back side at a position slightly behind the connection protrusion 35G, and the step portion is a spring support end 35H that supports the rear end of the push spring 50D.

[0087] In addition, the distance from the rear end of the rear end release cam 35E to the front end of the front end release cam 35F in the push rod 35 of the writing pen core 50 is shorter than the distance from the rear end of the rear end release cam 30E to the front end of the front end release cam 30F in the push rod 30 of the electromagnetic induction stylus 40 (refer to Figure 1C , Figure 2A to Figure 2D as well as Figure 3A to Figure 3D ). The meaning of this structure will be described later.

[0088] (2-3) Writing refill 55

[0089] like Figure 1C As shown, the writing refill 55 formed as a thermochromic refill has a structure in which a rod-shaped thermochromic core 55B is housed in a metal core housing tube 55A. In addition, a connecting portion 55C for connecting to the push rod 35 mentioned in the above-mentioned item (2-2) is installed at the rear end of the core housing tube 55A. A push spring 55D for applying force to the push rod 35 backward is arranged on the outer periphery of the connecting portion 55C. The push spring 55D is supported by its front end on the rear end edge of the refill support tube 60, and its rear end is supported by the spring support end 35H of the push rod 35, thereby applying force to the push rod 35 backward relative to the rod tube 10. In addition, the push rod 35 connected to the writing refill 55 has the same structure as the push rod 35 of the writing refill 50 described in detail in the above-mentioned item (2-2).

[0090] In the present embodiment, the thermochromic core 55B installed in the writing pen core 55 as a thermochromic core pen core contains at least a resin component, a wax component, a thermochromic coloring material and a white constituent material, and as the resin component, it contains at least one of rosin and rosin modified substances in the range of 0.5 weight % to 20 weight %, and as the wax component, it contains at least one of glycerol fatty acid esters and pentaerythritol fatty acid esters with a melting point of 45° C. or above in the range of 8 weight % to 50 weight %, thereby having thermochromic properties.

[0091] In the thermochromic core 55B of the present embodiment, the rosin and rosin modified substance used as the "resin component" can be any substance that is generally classified as rosin and rosin modified substance, without any special limitation, and any substance can be used. In addition, rosin acid, which is the main component of rosin, can also be used. In addition, the "rosin modified substance" here refers to glycerol ester of rosin, etc.

[0092] These substances are not distinguished between chemical substances and natural substances, and can be used alone or in combination of two or more, and are appropriately selected according to the colorability and hardness of the target thermochromic core 55B.

[0093] The content of the resin component is in the range of 0.5 wt % or more and 20 wt % or less. If the content is less than 0.5 wt %, the fixation on the smooth surface is poor and the coloring is insufficient, and the strength is weak and it is not practical. On the other hand, if it exceeds 20 wt %, it is hard, the fixation on the smooth surface is still poor and the coloring is insufficient.

[0094] In the thermochromic core 55B of the present embodiment, the glycerol fatty acid ester used as the "wax component" is not particularly limited as long as it is a substance having a melting point of 45°C or above and generally classified as a glycerol fatty acid ester. Any substance can be used. For example, palmitic acid glyceryl, stearic acid glyceryl, etc. having a melting point of 45°C or above, or any one of monoglyceride, diglyceride, and triglyceride can be used. In addition, as a substance other than these substances, any natural substance such as Japanese wax, urushiol, and other tree waxes, natural Japanese wax, natural urushiol, and other powdered waxes containing glycerol fatty acid ester as the main component can be used.

[0095] In the thermochromic core 55B of the present embodiment, the pentaerythritol fatty acid ester used as the "wax component" is not particularly limited as long as it is a substance having a melting point of 45°C or above and generally classified as a pentaerythritol fatty acid ester. Any substance can be used. For example, pentaerythritol palmitate, pentaerythritol stearate, etc. having a melting point of 45°C or above, or any one of monopentaerythritol, dipentaerythritol, tripentaerythritol, and tetrapentaerythritol can be used. In addition, if the melting point is lower than 45°C, the practical strength is too weak, and the thermochromic core 55B is easily broken when it is formed into a thinner shape.

[0096] The glycerol fatty acid ester and pentaerythritol fatty acid ester used in the thermochromic core 55B of this embodiment are not distinguished between chemical products and natural products, and can be used alone or in combination of two or more. They are appropriately selected according to the colorability and hardness of the target thermochromic core 55B.

[0097] The content of the wax component is in the range of 8% by weight or more and 50% by weight or less. If the content is less than 8% by weight, the thermochromic core 55B is hard, the fixation on the smooth surface is poor and the coloring is insufficient. On the other hand, if the content exceeds 50% by weight, the thermochromic core 55B becomes weak in strength and is not practical.

[0098] The "thermochromic coloring material" used in the thermochromic core 55B of the present embodiment refers to a thermochromic composition composed of at least a leuco dye, a color developer, and a color change temperature regulator, and also includes a microcapsule pigment encapsulated with these materials. From the perspective of making the wall material of the microcapsule pigment firm, it is desirable that the wall material of the microcapsule particles is formed by a wall material of a polymer resin, which is formed by a cross-linkable monomer, a polymer, or a polymer containing a cross-linking material, and the thermochromic composition is contained therein.

[0099] The leuco dye used in the thermochromic core 55B of the present embodiment is not particularly limited as long as it is an electron-donating dye and functions as a coloring agent. Specifically, from the perspective of obtaining excellent color development characteristics, for example, 3,3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide, 3-(4-diethylaminophenyl)-3-(1-ethyl-2-methylindol-3-yl)phthalide, 3-(4-diethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindol-3-yl)-4-azaphthalide, 1,3-dimethyl-6-diethylaminofluorane, 2-chloro-3-methyl-6-dimethylaminofluorane, 3-dibutylamino-6-methyl-7-anilinofluorane, 3-diethylamino-6-methyl-7-anilinofluorane, 3-diethylamino-6-methyl-7-xylaminofluorane, 2-(2-chloroanilino)-6-dibutyl ... Aminofluoran, 3,6-dimethoxyfluoran, 3,6-di-n-butoxyfluoran, 1,2-benzo-6-diethylaminofluoran, 1,2-benzo-6-dibutylaminofluoran, 1,2-benzo-6-ethylisopentylaminofluoran, 2-methyl-6-(N-p-tolyl-N-ethylamino)fluoran, 2-(N-phenyl-N-methylamino)-6-(N-p-tolyl-N-ethylamino)fluoran, 2-(3'-trifluoromethylanilino)-6-diethylaminofluoran, 3-chloro-6-cyclohexylaminofluoran, 2-methyl-6-cyclohexylaminofluoran, 3-methoxy-4-dodecyloxyphenylquinoline, etc. These materials can be used alone (one kind) or in combination of two or more kinds (hereinafter referred to as "at least one kind").

[0100] Furthermore, pyridine compounds, quinazoline compounds, bisquinazoline compounds, and the like that develop yellow or red colors can also be used.

[0101] These leuco dyes have a lactone skeleton, a pyridine skeleton, a quinazoline skeleton, a bisquinazoline skeleton, or the like, and develop colors when these skeletons (rings) are opened.

[0102] The color developer used in the thermochromic core 55B of the present embodiment develops the leuco dye. It is composed of particles in a crystalline state and is contained in the ink in the crystalline state.

[0103] Specific examples of coloring agents that can be used include, from the viewpoint of obtaining an ink having excellent coloring properties, o-cresol, tert-butylcatechol, nonylphenol, n-octylphenol, n-dodecylphenol, n-stearylphenol, p-chlorophenol, p-bromophenol, o-phenylphenol, hexafluorobisphenol, n-butyl p-hydroxybenzoate, n-octyl p-hydroxybenzoate, resorcinol, lauryl gallate, 2,2-bis(4'-hydroxyphenyl)propane, 4,4-dihydroxydiphenyl sulfone, 1,1-bis(4'-hydroxyphenyl)ethane, 2,2-bis(4'-hydroxy-3-methylphenyl)propane, bis(4-hydroxyphenyl)sulfide, 1-phenyl-1,1-bis(4'-hydroxyphenyl)ethane, 1,1-bis(4'-hydroxyphenyl)-3-methylbutane, 1,2-bis(4'-hydroxyphenyl)-1,2-bis(4'-hydroxyphenyl)-2,2 ... 1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpropane, 1,1-bis(4'-hydroxyphenyl)-2-methylpent ...

[0104] The color change temperature adjusting agent used in the thermochromic core 55B of this embodiment is configured as follows: in a heated and molten state, the combination between the leuco dye and the developer is cut off to form a decolorized state, and the color change temperature adjusting agent is cooled to below the melting point again to crystallize the color change temperature adjusting agent to form a color development state. The above operation is repeated, and the change is reversibly presented with the melting point of the color change temperature adjusting agent as the boundary. In addition, the following material can be used: in a heated and molten state, the combination between the leuco dye and the developer is cut off to form a decolorized state, and even if it is cooled to the melting point of the color change temperature adjusting agent again, the color change temperature adjusting agent will not crystallize at the melting point, but maintain the decolorized state. The latter color change temperature adjusting agent is crystallized by further lowering the temperature by several degrees to tens of degrees than the melting point, presenting a quasi-reversible change with hysteresis characteristics to form a color development state, and by heating and cooling again, the change repeatedly presents decolorization and color development.

[0105] The color-changing temperature adjusting agent that can be used in the thermal color-changing core 55B of the present embodiment has no special limitation as long as it has the above-mentioned functions. For example, compounds having at least one polar group such as a hydroxyl group, an ether bond, an amide bond, etc. can be listed. Specifically, saturated fatty acids such as decanoic acid, dodecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, docosanoic acid, tetracosanoic acid, hexacosanoic acid, and octacosanoic acid, octanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, dioctyl alcohol, etc. can be listed. Higher alcohols such as lauryl alcohol, isostearyl alcohol, and palmityl alcohol, amides of the above fatty acids and amines, esters of the above fatty acids and alcohols, ethers of the above higher alcohols and glycerol, propylene glycol, and ethylene glycol, and the like, and aromatic compounds such as diphenylpropanedione, dibenzyloxybenzene, diphenoxybenzene, diisopropylnaphthalene, benzylbiphenyl, benzylnaphthyl ether, dibenzyl sulfoxide, dimethyl terephthalate, diphenyl carbonate, diphenyl sulfone, fluoranthene, fluorene, methylhydroxynaphthalate, phenylhydroxynaphthalate, and steroids can be mentioned, and at least one of these substances can be used.

[0106] The average particle size of the microcapsule pigment is 0.1 to 20 μm, and the wall film is formed by acrylic resin, maleic acid resin, silicone resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polystyrene, etc., in addition to being formed by amino resins such as epoxy resin, polyamide resin, acrylonitrile resin, polyurethane resin, polyurea resin, urea-formaldehyde resin, melamine-formaldehyde resin, benzoguanamine resin, butylated melamine resin, butylated urea resin, urea-melamine resin, etc., and the thermochromic composition is included. In addition to these resins, it can also be formed by gelatin, starch, gum arabic, sodium polyacrylate, hydroxyethyl cellulose, methyl cellulose, polyacrylate, ethyl cellulose, cellulose acetate, etc.

[0107] When the "thermochromic coloring material" of the thermochromic core 55B of this embodiment is a microcapsule pigment, it can be produced by microencapsulating a thermochromic composition including at least the above-mentioned leuco dye, developer, and color change temperature adjuster so that the average particle size becomes 0.1 to 20 μm.

[0108] Examples of microencapsulation methods include interfacial polymerization, interfacial polycondensation, in-situ polymerization, in-liquid solidification and coating, aqueous solution phase separation, organic solvent phase separation, melt dispersion cooling, air suspension coating, and spray drying, and can be appropriately selected depending on the intended use.

[0109] For example, in the phase separation method of aqueous solution, after the leuco dye, the color developer, and the color change temperature adjuster are heated and melted, they are added to the emulsifier solution and heated and stirred to be dispersed in the form of oil droplets. Then, as a capsule film agent, for example, a resin raw material whose wall membrane can be formed by an amino resin is used, and each solution such as an amino resin solution, specifically a hydroxymethylmelamine aqueous solution, a urea solution, and a benzoguanamine solution is gradually added. After continuing to react and modulating, the dispersion is filtered, thereby being able to produce the target thermochromic microcapsule pigment.

[0110] The contents of these leuco dye, developer, and color change temperature adjuster vary depending on the types of leuco dye, developer, and color change temperature adjuster used, the microencapsulation method, etc., but the developer is 0.1 to 100 and the color change temperature adjuster is 1 to 100 in terms of mass ratio relative to 1 leuco dye. In addition, the capsule film is 0.1 to 1 in terms of mass ratio relative to the capsule content.

[0111] In the microcapsule pigment of the thermochromic core 55B of the present embodiment, by appropriately combining the types and amounts of the leuco dye, color developer, and color change temperature adjuster, the color of each pigment, the color development temperature, and the color elimination temperature can be set as desired.

[0112] When the "thermochromic coloring material" of the thermochromic core 55B of the present embodiment is set as a microcapsule pigment, the wall film is preferably formed of a resin, and more preferably, from the viewpoint of manufacturability, storage stability, and writing properties, it is expected to be formed of a thermosetting resin such as an amino resin containing a melamine resin. The thickness of the wall film of the microcapsule pigment is appropriately determined according to the required wall film strength, line drawing concentration, etc.

[0113] From the perspective of colorability, color development, easy decolorization, stability, and suppression of adverse effects on writing properties, the average particle size of the "thermochromic coloring material" when it is a microcapsule pigment is expected to be 0.1 to 20 μm, and more preferably, it is expected to be 0.2 to 5.0 μm. In addition, the "average particle size" mentioned in the thermochromic core 55B of this embodiment is a value obtained by measuring the average particle size (arithmetic mean diameter based on volume-based distribution) using a laser diffraction scattering particle size distribution measuring device (laser diffraction scattering particle size distribution meter MT3000 (manufactured by Nikkiso Co., Ltd.)).

[0114] If the average particle size is less than 0.1 μm, sufficient drawing density cannot be obtained. On the other hand, if it exceeds 20 μm, the writing properties are deteriorated, the dispersion stability of the microcapsule pigment is reduced, and the microcapsule pigment is separated from the writing surface due to friction, which is not preferred.

[0115] The microcapsule pigment having an average particle size within the above range (0.1 to 20 μm) varies depending on the microencapsulation method, but can be prepared by appropriately combining stirring conditions when producing the microcapsule pigment in a phase separation method of an aqueous solution or the like.

[0116] In the thermochromic core 55B of the present embodiment, the content of the "thermochromic coloring material" is preferably 5 to 30% by weight, more preferably 10 to 25% by weight, based on the total amount of the ink composition.

[0117] If the content of the thermochromic coloring material (color-developing particles) is less than 5% by weight, the coloring power and color development properties become insufficient. On the other hand, if it exceeds 30% by weight, blurring tends to occur, which is not preferable.

[0118] In addition to the "thermochromic coloring material" in the thermochromic core 55B of this embodiment, the coloring material can include a common pigment. As the pigment, all azo organic pigments such as disazo yellow AAA and pyrazolone orange, cyanine organic pigments such as phthalocyanine blue and phthalocyanine green, advanced organic pigments such as quinacridone red, dyeing pigments such as fanal color, fluorescent pigments, inorganic pigments such as carbon black, iron black, red lead, indigo, etc. can be used.

[0119] The "white constituent material" in the thermochromic core 55B of this embodiment includes known constituent materials such as titanium dioxide, calcium carbonate, kaolin, talc, precipitated barium sulfate, mica, boron nitride, potassium titanate whiskers, and basic magnesium sulfate whiskers, and all materials that present white can be used.

[0120] Here, as "titanium dioxide", all conventionally known titanium dioxides can be used, regardless of whether they are rutile or anatase. However, when the goal is to draw darkly and clearly on a transparent plate surface such as transparent plastic or glass, the particle size of the catalyst titanium dioxide is relatively fine, resulting in a shallow drawing surface, which is not ideal. However, as described below, it is more suitable when it is set as an underline marker that can be seen through the bottom layer.

[0121] In addition, for example, if titanium dioxide is not added but only these white constituent materials are added to form a color-changing thermochromic core 55B, it can be used as an underline marker that draws a translucent line that can be seen through the underlying layer. In addition, when a translucent sheet is further covered on the line to make a copy, the part with the line on the copy disappears and becomes a makeshift fill-in-the-blank question set.

[0122] In a state (not shown) where the writing core 55 protrudes from the tip opening 12A, the multi-function pen 1 can write a thermochromic drawing line using the thermochromic core 55B protruding from the tip.

[0123] (3) Guide tube 20

[0124] The guide tube 20 is housed near the rear end of the shaft tube 10 of the multifunctional pen 1 of this embodiment. The guide tube 20 includes guide rails 26 and 27 for sliding the push rods 30 and 35 along the axial direction in response to the push action. Figure 4A to Figure 4D The roughly cylindrical appearance as shown. Figure 4A to Figure 4D Using stereograms ( Figure 4A )、Main View( Figure 4B )、Back View( Figure 4C ) and side cross-sectional view ( Figure 4D ) represents the guide tube 20.

[0125] The guide tube 20 is a roughly cylindrical member with a hollow dome-shaped friction body 20A installed at the rear end. An opening is formed in the annular portion 22 located at the front end of the guide tube 20, and the opening is a through hole 22A for the push rods 30 and 35 to pass through. In addition, four side openings 24 are evenly arranged on the side of the guide tube 20 as long holes along the axial direction. A pair of guide rails 26 and 27 along the axial direction are formed as step portions recessed from the surface in the side openings 24. These guide rails 26 and 27 are stepped portions in the axial direction relative to the surface of the rod tube 10 on both inner sides of the guide hole 14A of the rod tube 10. Among the four pairs of guide rails 26 and 27 in total, the pair of guide rails with a shorter axial length than the other guide rails is used for the push rod 30 of the electromagnetic induction touch pen 40 to slide on it, and the other three pairs of guide rails with a relatively longer axial length are used for the push rod 35 of the writing pen core 50 and 55 to slide on it. The front ends of the pair of guide rails 26 having a relatively short axial length serve as locking ends 26A to which the rear end locking portion 30C of the push rod 30 of the electromagnetic induction touch pen 40 is locked. On the other hand, the front ends of the three pairs of guide rails 27 having a relatively long axial length serve as locking ends 27A to which the rear end locking portion 35C of the push rod 35 of the writing refills 50 and 55 is locked. In addition, a guide groove 28 along the axial direction is formed between each of the guide rails 26 and 27, and as described above, the rear end release cam 30E and the front end release cam 30F of the push rod 30 of the electromagnetic induction touch pen 40 and the rear end release cam 35E and the front end release cam 35F of the push rod 35 of the writing refills 50 and 55 penetrate the guide groove 28 in a manner that allows free movement along the axial direction.

[0126] Here, the length of the guide rail 26 for the electromagnetic induction stylus pen 40 to slide along the axial direction in response to the pressing action (i.e., the pressing stroke of the electromagnetic induction stylus pen 40) is approximately equal to the distance from the rear end of the rear end release cam 35E to the front end of the front end release cam 35F in the pressing rod 35 of the writing pen core 50 (refer to Figure 5COn the other hand, the length of the guide rail 27 for the push rod 35 of the writing pen core 50, 55 to slide along the axial direction with the push action (i.e., the push stroke of the writing pen core 50, 55) is substantially equal to the distance from the rear end of the rear end release cam 30E to the front end of the front end release cam 30F in the push rod 30 of the electromagnetic induction touch pen 40 (refer to Figure 6C ).

[0127] Furthermore, the guide rails 26 and 27 may not be provided on a member independent of the shaft barrel 10 like the guide barrel 20 described above, but may be directly formed on the shaft barrel 10 as a step portion recessed from the surface, for example.

[0128] like Figure 4A to Figure 4D As shown, the friction body 20A is in the shape of a hollow dome and is used to eliminate the drawn line formed by the thermochromic core 55B of the writing pen core 55 as the thermochromic core pen core by friction.

[0129] In the present embodiment, as the friction body 20A, a soft resin (rubber, elastomer) such as silicone resin, styrene-containing resin, fluorine-based resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene monomer (EPDM), or a hard resin such as polyacetal resin, polyethylene resin, polypropylene resin, ABS resin, polycarbonate resin, or polyester resin can be used. In particular, among the above-mentioned hard resins, a resin having a hardness of 60 or more in the durometer type A in JIS K6253 is preferred. If the hardness is less than 60, it is too soft, and therefore it is difficult to generate friction heat when the note is rubbed to change color. The hardness is preferably 65 or more and 100 or less, and more preferably 70 or more and 90 or less, so that the note can be changed color by friction heat without any problem.

[0130] (4) Action

[0131] (4-1) Standby position

[0132] like Figure 1C As shown in the figure, the total length of the electromagnetic induction touch pen 40 is about 7 mm longer than the total length of the writing refills 50 and 55. In addition, the axial length of the push rod 30 of the electromagnetic induction touch pen 40 is substantially the same as the axial length of the push rod 35 of the writing refills 50 and 55. Therefore, when all the refills are in the standby position, as described above, the top end of the electromagnetic induction touch pen 40 is located at a position that is closer to the front end than the top end of the writing refills 50 and 55 by a distance corresponding to the difference in the total length, which is about 7 mm. On the other hand, the front end of the front end release cam 30F of the push rod 30 of the electromagnetic induction touch pen 40 is located at a position that is closer to the front end than the front end of the front end release cam 35F of the push rod 35 of the writing refills 50 and 55.

[0133] (4-2) Pressing Action of Electromagnetic Induction Stylus Pen 40

[0134] When the push protrusion 30A (i.e., the pen clip 30I) of the electromagnetic induction stylus pen 40 is automatically Figure 1C When the push action moves forward from the standby position shown (refer to Figure 5A and Figure 5B ), the sliding surface 30B of the push rod 30 slides on the corresponding guide rail 26, and the electromagnetic induction touch pen 40 moves forward while compressing the push spring 40L. Then, when the sliding surface 30B moves to the front end of the guide rail 26, the electromagnetic induction touch pen 40 moves a distance equivalent to its push stroke. Then, as Figure 5C As shown in FIG. 1 , the push rod 30 is pressed in the axial direction, and the rear end locking portion 30C is locked with the locking end 26A of the guide rail 26. In this state, the top end of the electromagnetic induction touch pen 40 protrudes from the top end opening 12A, and the state is transferred to the use position. In this state, the top end of the electromagnetic induction touch pen 40 in the use position and the top end of the writing refills 50 and 55 in the standby position are separated by a distance that does not affect the electromagnetic induction of the electromagnetic induction touch pen 40, specifically, by more than 15 mm, so that the metal part used for the top end of the writing refills 50 and 55 does not affect the electromagnetic induction of the electromagnetic induction touch pen 40 and hinder the input.

[0135] Here, the front end position of the front end release cam 35F of the push rod 35 of the writing refill 50, 55 located at the standby position is located at a position substantially consistent with the front end position of the guide rail 26. In addition, the rear end release cam 30E of the push rod 30 of the electromagnetic induction touch pen 40 already located at the use position is located near the axis immediately in front of the front end of the guide rail 26. In this state, when the push protrusion 35A of the push rod 35 of the writing refill 50, 55 is pushed, the front end release cam 35F of the push rod 35 of the writing refill 50, 55 moves forward, and abuts against and presses the rear end release cam 30E of the push rod 30 of the electromagnetic induction touch pen 40 located immediately in front of it. Then, the locking of the rear locking portion 30C with the locking end 26A is released, and the pressing rod 30 of the electromagnetic induction touch pen 40 is pushed back to the rear due to the recovery of the compressed pressing spring 40L, and the electromagnetic induction touch pen 40 returns to the position. Figure 1C The standby state is shown.

[0136] (4-3) Pressing action of writing pen core 50

[0137] When the push projection 35A of the writing pen core 50 is automatically Figure 1C When the push action moves forward from the standby position shown (refer to Figure 6B), the sliding surface 35B of the push rod 35 slides on the corresponding guide rail 27, and the writing pen core 50 moves forward while compressing the push spring 50D. Then, when the sliding surface 35B moves to the front end of the guide rail 27, the writing pen core 50 moves a distance equivalent to its push stroke. Then, as shown in FIG. Figure 6C As shown, the push rod 35 is pressed in the axial direction, and the rear end locking portion 35C is locked with the locking end 27A of the guide rail 27. In this state, the tip of the writing refill 50 protrudes from the tip opening 12A, and is in the state of being transferred to the use position.

[0138] Here, the front end position of the front end release cam 30F of the push rod 30 of the electromagnetic induction touch pen 40 located at the standby position is located at a position substantially consistent with the front end position of the guide rail 27. In addition, the rear end release cam 35E of the push rod 35 of the writing refill 50 already located at the use position is located near the axis immediately in front of the front end of the guide rail 27. In this state, when the push protrusion 30A (i.e., the pen clip 30I) of the push rod 30 of the electromagnetic induction touch pen 40 is pushed, the front end release cam 30F of the push rod 30 of the electromagnetic induction touch pen 40 moves forward, and abuts against and presses the rear end release cam 35E of the push rod 35 of the writing refill 50 located immediately in front of it. Then, the locking of the rear end locking portion 35C with the locking end 27A is released, and the push rod 35 of the writing pen core 50 is pushed back to the rear due to the recovery of the compressed push spring 50D, and the writing pen core 50 is restored to the position. Figure 1C The standby state is shown.

[0139] Furthermore, the pressing action of the writing refill 55 is also the same as that of the writing refill 50 described above.

[0140] Industrial Applicability

[0141] The present invention can be utilized as a multifunctional pen.

Claims

1. A multifunctional pen, the multifunctional pen comprising a plurality of pen cores inside a barrel, the plurality of pen cores including an electromagnetic induction touch pen as a pen core, Furthermore, by the forward pushing action of the push rod connected to the rear ends of the plurality of pen cores, the top end of one of the plurality of pen cores is transferred from a standby position staying inside the shaft barrel to a use position protruding from the top end opening of the shaft barrel. The multifunctional pen is characterized in that: At least one of the writing refills other than the electromagnetic induction stylus pen among the plurality of refills includes a writing tip made of metal, The rod barrel includes a guide rail for the push rod to slide along the axial direction accompanying the push action. Furthermore, the guide rail for the push rod of the electromagnetic induction stylus pen to slide is shorter than the guide rail for the push rod of the writing pen core to slide. The tip of the electromagnetic induction stylus located at the use position is separated from the tip of the writing refill located at the standby position by a distance that does not affect the electromagnetic induction of the electromagnetic induction stylus. The distance is more than 15 mm, The electromagnetic induction touch pen is provided with a connection part for connecting with the push rod via a rear end joint at the rear end of the storage rod, and a push spring is provided on the outer periphery of the connection part. The push spring is supported by its front end on the rear end edge of the pen core support tube installed inside the rod tube, and its rear end is supported by the spring support end of the push rod, so as to apply force to the push rod backward relative to the rod tube. A return spring is sandwiched between the rear end joint and the connecting portion to apply force to the storage rod toward the front end direction. The push rod comprises: a sliding surface that slides on the guide rail; a pressing protrusion, which protrudes outward relative to the sliding surface and extends backwards from a rear end of the sliding surface; A rear end locking portion, which is a step portion between the rear end of the sliding surface and the pressing protrusion, and is locked with the front end of the guide rail at the use position of the corresponding pen core; a rear end release cam, which protrudes from the vicinity of the rear end of the sliding surface toward the axial direction and is located forward of the front end of the guide rail when the corresponding refill is in the use position; as well as a front end release cam which protrudes in the axial direction from the sliding surface at a position forward of the rear end release cam and abuts against the rear end release cam of the push rod corresponding to the other pen core which is already in the use position when the corresponding pen core is transferred from the standby position to the use position, In the standby position of the electromagnetic induction stylus pen, the front end position of the front end release cam of the corresponding push rod is substantially consistent with the front end position of the guide rail corresponding to the writing pen core. In the standby position of the writing pen core, the front end position of the front end release cam of the corresponding push rod is substantially consistent with the front end position of the guide rail corresponding to the electromagnetic induction stylus. The tip of the electromagnetic induction stylus at the standby position is closer to the front end than the tip of the writing pen core also at the standby position, and is closer to the front end within the range where the electromagnetic induction stylus functions when in use.

2. The multifunctional pen according to claim 1, characterized in that: The guide rail is provided in a substantially cylindrical guide tube housed inside the rod tube, and is formed as a step portion recessed in the axial direction relative to the surface of the rod tube on both inner sides of a guide hole which is a long hole along the axial direction. A guide groove along the axial direction is provided between the guide rails. The rear end release cam and the front end release cam penetrate the guide groove so as to be movable in the axial direction.

3. The multifunctional pen according to claim 1 or 2, characterized in that: The shape of the push protrusion of the push rod connected to the electromagnetic induction touch pen is different from the shape of the push protrusion of the push rod connected to the writing pen core.

4. The multifunctional pen according to claim 1 or 2, characterized in that: As the writing pen core, a thermochromic core pen core having a thermochromic core is included. Furthermore, a friction body for eliminating the drawn line formed by the thermochromic core is provided at the rear end of the rod barrel.

5. The multifunctional pen according to claim 3, characterized in that: As the writing pen core, a thermochromic core pen core having a thermochromic core is included. Furthermore, a friction body for eliminating the drawn line formed by the thermochromic core is provided at the rear end of the rod barrel.

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