JP2009292064A - Electric multi core writing instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric multi core writing instrument which enables multiple kinds of writing cores to be selectively exposed by the driving force of a motor. <P>SOLUTION: The electric multi core writing instrument 1 which enables the exposure of the writing core by the driving force of a motor includes: a shaft sleeve which houses a plurality of writing cores 3; an operation part 60 which receives the operation by a user; a writing core delivery mechanism 10 for exposing and sinking the writing core 3 from and into the leading end of the shaft sleeve by the driving force of the motor and also controlling the exposure conditions of the plurality of writing cores 3 from the operation received by the operation part 60; a decelerator motor 20; a motor control part 70. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electric writing instrument that enables a writing core to be raised and lowered by a driving force of a motor, and relates to an electric multi-core writing tool that enables a plurality of types of writing cores to be selectively raised and raised.

Conventionally, there is JP-A-2001-121881 as a technology in such a field. In the electric writing instrument described in this publication, when the switch is pressed while the ball-point pen writing core is housed, the rotating shaft of the small DC motor starts rotating by the control circuit. Accordingly, the rotating screw rod rotates and the sliding screw cylinder advances. Thereby, the ball-point pen writing core moves forward. The sliding screw cylinder further advances and pushes the button part of the sensor switch, thereby stopping the rotation of the small DC motor through the control circuit. When the writing is finished, when the switch is pressed, the control circuit starts the reverse rotation of the rotating shaft of the small DC motor. Along with this, the rotating screw rod rotates and the sliding screw cylinder moves backward. Thereby, the ball-point pen writing core moves backward. Then, when the sliding screw cylinder pushes the button part of the sensor switch, the rotation of the small DC motor is stopped via the control circuit.
JP 2001-121881 A JP 2001-239789 A

  However, the above-described conventional electric writing instrument achieves the single core, that is, one writing core by the driving force of the motor, and enables only single-color writing. There is a need for a writing instrument that can select multiple colors.

  An object of the present invention is to provide an electric multi-core writing instrument in which a plurality of types of writing cores can be selectively moved by a driving force of a motor.

  An electric multi-core writing instrument according to the present invention is an electric writing instrument that enables a writing core to be moved in and out by a driving force of a motor, a shaft cylinder that accommodates a plurality of writing cores, an operation receiving unit that receives an operation by a user, and a motor And a writing core control unit that causes the writing core to protrude and retract from the tip of the shaft cylinder by a driving force, and controls a protruding state of a plurality of writing cores based on an operation received by the operation receiving unit.

  In this electric multi-core writing instrument, the user's operation is received by the operation receiving means, and based on the operation, the writing centering control means causes the writing core to protrude and retract from the tip of the shaft cylinder by the driving force of the motor. Can be set to the haunting state desired by the user.

  Further, the writing core control means causes the writing core selected by the core selection operation to protrude from the tip of the shaft tube when the operation receiving means receives a core selection operation for selecting any of the plurality of writing cores. When the operation receiving means receives a lead storing operation for storing all of the plurality of writing cores, the motor may be driven so that all the writing cores are buried in the shaft cylinder.

  In this case, when the user selects a desired writing core by the core selection operation, the writing core control means protrudes the selected writing core from the tip of the shaft tube, so that the user can project the desired writing core. Further, when the user performs a lead storing operation, the writing lead control means embeds all of the writing lead in the shaft cylinder, so that the user can bury all the writing leads by the operation.

  Further, the operation receiving means has a plurality of switches corresponding to each of the plurality of writing cores, and the writing core control means selects the writing core corresponding to the switch operated by the user among the plurality of switches. It is good also as driving a motor so that it may protrude from the tip.

  In this case, the user can project the writing core by operating a switch corresponding to a desired writing core in the core selection operation.

  Further, the electric multi-core writing instrument of the present invention further comprises an in / out state detecting means for detecting an in / out state of a plurality of writing cores, and the writing core control means includes a type of the writing core corresponding to the switch operated by the user, When the type of the writing core detected as currently protruding from the tip of the shaft cylinder by the presence / absence state detection means matches, the motor is driven so that all the writing cores are buried in the shaft cylinder. Also good.

  In this case, the user can embed all the writing cores in the shaft cylinder by operating a switch corresponding to the type of the writing core that is currently protruding.

  Further, the operation accepting unit has a number of switches smaller than the number of writing cores, and the writing core control unit detects the operation of the switch performed in a predetermined operation procedure when the operation accepting unit detects The motor may be driven so that the writing core corresponding to the operation procedure protrudes from the tip of the shaft cylinder.

  In this case, the user can project a desired writing core from the shaft cylinder by operating the switch according to a predetermined operation procedure. Moreover, since the number of switches of the operation reception means is smaller than the number of writing cores, the operation reception means can be simplified.

  According to the present invention, a plurality of types of writing cores can be selectively brought in and out by the driving force of the motor.

  Hereinafter, preferred embodiments of an electric multi-core writing instrument according to the present invention will be described in detail with reference to the drawings. In the following description, the pen tip side is referred to as “front side”.

(First embodiment)
As shown in FIGS. 1 to 3, the electric multi-core writing instrument 1 has a shaft cylinder 2 including a front shaft 2 a, a rear shaft 2 b, and a cap 2 c, and a male screw portion provided on the rear side of the front shaft 2 a. The front shaft 2a and the rear shaft 2b are connected to each other by screwing with a female screw portion provided on the front side of the rear shaft 2b. The rear shaft 2b and the cap 2c are connected by screwing between a male screw portion provided on the rear side of the rear shaft 2b and a female screw portion provided on the front side of the cap 2c. A grip may be provided on the front shaft 2a.

  Three different writing cores 3 are accommodated in the shaft cylinder 2. In the following, as the three writing cores 3, a writing core (hereinafter, red core) 3 r containing red ink, a writing core (hereinafter, black core) 3 k containing black ink, and a blue core A description will be given assuming that a writing core (hereinafter, blue core) 3b containing ink is employed. Each writing core 3 is selectively projected and retracted from the tip of the shaft cylinder 2 via the writing core projecting and retracting mechanism 10 that is operated by the driving force of the reduction motor 20 based on an instruction from the user input from the operation unit 60. Is done. This writing centering and retracting mechanism 10 is accommodated in the shaft cylinder 2.

  In the shaft cylinder 2, a reduction motor 20 is disposed behind the writing center raising / lowering mechanism 10, and the output shaft 20 a of the reduction motor 20 and the writing center raising / lowering mechanism 10 are connected by a connecting portion 30. Further, in the shaft cylinder 2, three button batteries 40 used as a power source are disposed behind the reduction motor 20, and the button batteries 40 are connected in series. Each button battery 40 can be replaced by removing the cap 2c screwed to the rear shaft 2b. The cap 2c is provided with a clip 5.

  As shown in FIGS. 2 and 4, the writing core retracting mechanism 10 is interlocked with the output shaft 20 a of the reduction motor 20, and is rotatable at the rear end of each of the driving cam 11 and the writing core 3 that are rotatable within the shaft cylinder 2. The cam follower 12 has a driven surface 12 a that is fixed and biased to the cam surface 16 of the drive cam 11 by a spring force, and a helical spring 13 that biases the cam follower 12 toward the drive cam 11.

  The drive cam 11 includes a cylindrical base portion 11 a that slides in the circumferential direction along the inner peripheral surface of the shaft tube 2, and a mountain-shaped cam that protrudes from the end portion of the base portion 11 a toward the distal end side of the shaft tube 2. It consists of a cam body 11 b having a surface 16. The cam body 11b protrudes in a claw shape from the end of the base 11a and has a shape obtained by obliquely cutting a cylinder.

  The cam follower 12 is formed with a V-shaped driven surface 12a and a tongue piece 12b extending perpendicularly to the driven surface 12a and protruding toward the drive cam 11, and the arc-shaped tongue piece 12b. The front surface is in contact with the back surface of the cam body 11b. Further, the cam follower 12 is provided with a linear guide piece 12c extending in the direction of the central axis of the shaft cylinder 2, and the guide piece 12c is a guide groove 2d formed on the inner peripheral surface of the shaft cylinder 2 (FIG. 2). Reference) Moves in the direction of the central axis of the barrel 2.

  As shown in FIG. 2, one end of the spiral spring 13 is locked to the front end of the cam follower 12, and the other end of the spiral spring 13 is locked to a spring receiving portion 14 formed in the shaft cylinder 2. Accordingly, the spring force of each helical spring 13 can be transmitted to the respective writing cores 3, and the driven surface 12 a of the cam follower 12 can be kept in contact with the cam surface 16 of the drive cam 11 at all times.

  In this case, when the drive cam 11 connected to the output shaft 20a of the reduction motor 20 rotates by the same direction and the same rotation angle as the output shaft 20a of the reduction motor 20, writing is performed by the top portion 16a of the cam surface 16 having a mountain shape. The cam follower 12 fixed to the rear end of the core 3 is pressed toward the front end side of the shaft tube 2 against the spring force of the spiral spring 13. As a result, the nib 3a of the writing core 3 protrudes from the tip of the shaft cylinder 2, and the writing core 3 becomes ready for writing.

  Based on such basic operation, when the drive cam 11 rotates by a desired angle to a position where the desired cam follower 12 exists, and the top 16a of the cam surface 16 also rotates by a predetermined angle, the top 16a of the cam surface 16 and The top 12 d of the cam follower 12 is matched, and for example, the red core 3 r can be projected from the tip of the shaft tube 2. From this state, when the drive cam 11 rotates 60 degrees, the top 16a of the cam surface 16 moves to the middle of the top 12d of the adjacent cam follower 12, and the nib 3a of the red core 3r completely enters the shaft cylinder 2. . At this time, since the remaining two writing cores 3k and 3b are still buried in the shaft cylinder 2, the pen nibs 3a of all the writing cores 3 are stored in the shaft cylinder 2. When the driving cam 11 further rotates from this state, the black core 3k adjacent to the red core 3r protrudes from the tip of the shaft tube 2.

  By repeating the operation as described above, in this writing core retracting mechanism 10, every time the driving cam 11 rotates 60 degrees in one direction, the red core 3r protrudes → all the writing cores 3 are embedded → the black core 3k. Projecting → all writing cores 3 are buried → red cores 3 b are projected → all writing cores 3 are buried → red cores 3 r are projected →... it can. Since the writing core 3 can be replaced by removing the front shaft 2a, the writing core 3 can be arbitrarily replaced, and the order of appearance of the pen tip 3a can be changed by the user.

  The connecting portion 30 includes a convex member 31 fixed to the output shaft 20 a of the reduction motor 20 with a screw and a concave portion 32 formed on the bottom wall of the drive cam 11. By fitting the convex member 31 into the concave portion 32, the rotation of the output shaft 20 a of the reduction motor 20 is reliably transmitted to the drive cam 11 of the writing core retracting mechanism 10.

  Next, the control of the state of the writing core 3 in the electric multi-core writing instrument 1 will be described. In the following description, the writing core projecting state in which the nib of the red core 3r protrudes from the tip of the shaft cylinder 2 is “red writing state”, and the nib of the black core 3k protrudes from the tip of the shaft cylinder 2. In some cases, the writing center indentation state is referred to as “black core writing state”, and the writing center indentation state in which the pen tip of the blue core 3 b protrudes from the tip of the shaft tube 2 is referred to as “blue core writing state”. In addition, the writing core protruding and protruding state in which the pen tips of all the writing cores 3r, 3k, and 3b are buried in the shaft cylinder 2 may be referred to as an “entire core retracted state”.

  As shown in FIG. 3, the electric multi-core writing instrument 1 includes an operation unit 60 that receives a user operation and a motor control unit 70 that controls the reduction motor 20 so as to realize an operation corresponding to the user operation. . Furthermore, the motor control unit 70 includes an information processing unit 80 that performs information processing necessary for motor control.

  As shown in FIGS. 2, 3, and 5, the motor control unit 70 includes light emitting / receiving photosensors A and B positioned on the substrate 53 fixed to the front end of the reduction motor 20, and the drive cam 11. A position detection unit 55 is provided which is fixed to the bottom wall and includes an encoder 54 in which the reflection films S1 and S2 are arranged at predetermined positions. For example, when three types of writing cores 3 are arranged every 120 degrees in the shaft cylinder 2, the photosensors A and B have an arrangement relationship of about 120 degrees as shown in FIG. The films S1 and S2 have a fan shape having a spread of 60 degrees, and the reflective film S1 and the reflective film S2 are separated by 60 degrees. Each of the photosensors A and B outputs a predetermined detection signal to the information processing unit 80 when detecting the reflective film S1 or S2 at the facing position.

  If the output shaft 20a of the reduction motor 20 is rotated in the direction of arrow Y (see FIG. 5A), the drive cam 11 also rotates in the arrow Y direction, and the encoder 54 also rotates in the arrow Y direction. Each time the encoder 54 rotates 60 degrees, the ON / OFF combination of the detection signal output from the photosensor A and the detection signal output from the photosensor B changes. Hereinafter, the ON / OFF combination of the detection signal output from the photosensor A and the detection signal output from the photosensor B is referred to as “signal combination”.

  On the other hand, the information processing unit 80 stores sensor setting information 81 in which the above signal combination is associated with the three writing cores 3 in and out. Accordingly, the information processing unit 80 can detect the current state of the writing core 3 by referring to the sensor setting information 81 based on the signal combination. For example, when the signal combination is “sensor A is ON and sensor B is OFF”, the information processing unit 80 indicates that the writing core 3 is in the “red writing state” and “sensor A is ON”. When the sensor B is ON, the writing core 3 is in the “black core writing state”, and when the sensor A is OFF and the sensor B is ON, the writing core 3 is in the “blue core” state. "Writing state" is detected. Further, when the signal combination is “sensor A is OFF and sensor B is OFF”, it is detected that the state in which the writing core 3 is in the “entire core retracted state” is detected.

  The position detection unit 55 having such a structure is easy to be incorporated into the electric multi-core writing instrument 1, can determine the position of the drive cam 11 with a simple configuration, and detects the present state of the writing core 3. Configure the means. Since the motor control unit 70 has such a position detection unit 55, it is possible to control to drive the writing core protruding and retracting mechanism 10 to a position corresponding to the target protruding and retracting state.

  The operation unit 60 to which a user instruction is input has three push button switches such as a red switch 61r, a black switch 61k, and a blue switch 61b. These switches 61r, 61k, and 61b are of a type that is turned on when pressed by the user's finger, and is returned to the OFF state by a spring when the user releases the finger. Each of the switches 61r, 61k, 61b outputs a predetermined ON signal to the information processing unit 80 when it is turned on.

  The three switches 61r, 61k, 61b correspond to the writing cores 3r, 3k, 3b on a one-to-one basis. When any of the switches 61r, 61k, 61b is pressed (core selection operation), the switches are pressed. The pen tip of the writing core 3 corresponding to the switch protrudes from the tip of the shaft tube 2. When any of the switches 61r, 61k, 61b corresponding to the currently protruding writing core 3 is pressed again (core storing operation), the pen tips of all the writing cores 3 are buried in the shaft tube 2. . For example, when the red switch 61r is pressed with the red core 3r protruding, all the writing cores are buried in the shaft tube 2.

  An information processing board 52 (see FIG. 2) is embedded under the switches 61r, 61k, 61b. On the information processing board 52, a semiconductor chip 52a for exchanging electrical signals with the switches 61r, 61k, 61b, the photosensors A, B, and the reduction motor 20 is mounted. The information processing unit 80 is a component realized in software by the semiconductor chip 52a operating according to a predetermined program stored in advance. The sensor setting information 81 is stored in the storage area of the semiconductor chip 52a.

  Processing of the information processing unit 80 for realizing the above-described operation according to the user operation of the electric multi-core writing instrument 1 will be described with reference to FIGS. 3, 6, and 7.

  When the information processing unit 80 receives an ON signal from the red switch 61r by a user operation (S101), the current signal combination is detected by referring to the detection signals from the photosensors A and B, respectively. Then, the information processing unit 80 determines whether or not the current signal combination is a signal combination corresponding to the “red core writing state” (sensor A is ON and sensor B is OFF) (S102). Here, when it is determined that the current signal combination is not a combination corresponding to the “red core writing state”, the target signal combination to be shifted by the motor drive corresponds to the “red core writing state”. It is recognized as a combination (S103). On the other hand, if it is determined in the processing of S102 that the current signal combination is a combination corresponding to the “red core writing state”, the target signal combination to be transferred corresponds to the “all core storage state”. (S104).

  Further, when the information processing unit 80 receives an ON signal from the black switch 61k by a user operation (S111), processing S112 to S114 is performed to recognize a target signal combination to be transferred. Similarly, when the information processing unit 80 receives an ON signal from the blue switch 61b by a user operation (S121), processing S122 to S124 is performed to recognize a target signal combination to be transferred. In the processing S112 to S114 and the processing S122 to S124, the “red switch 61r” in the above-described processing S102 to S104 is replaced with “black switch 61k” and “blue switch 61b”, respectively, and “red core” is replaced with “red core”. Since it is an equivalent process understood by replacing it with “black core” and “blue core”, detailed description is omitted.

  After any of the above processes S103, S104, S113, S114, S123, and S124, the information processing unit 80 causes the reduction motor 20 to rotate the encoder 54 so as to shift to the recognized target signal combination. Drive (S131).

  This process S131 will be further described with reference to FIGS. First, the information processing unit 80 starts energization of the reduction motor 20 and starts rotation in the Y direction (see FIG. 5A) (S201). The information processing unit 80 repeatedly detects the current signal combination of the sensors A and B while the rotation of the reduction motor 20 continues (S202), and compares the detected signal combination with the target signal combination. (S203) is repeated. Then, when the detected signal combination matches the target signal combination, the energization to the reduction motor 20 is stopped and the rotation is stopped (S204).

  As a result, the encoder 54 is stopped in a state where the target signal combination is obtained, and the drive cam 11 of the writing centering and retracting mechanism 10 is stopped, so that the target writing centering and protruding state is achieved. As described above, the user of the electric multi-core writing instrument 1 can cause any desired writing core 3 to protrude from the tip of the barrel 2 by operating the operation unit 60, or can remove all the writing cores 3 from the barrel 2. It is possible to store it inside. Note that, according to the writing center retracting mechanism 10, three positions corresponding to the “entire core retracted state” appear during one rotation of the driving cam 11, but according to the above-described processing S 201 to S 204, the driving is performed. The reduction motor 20 is stopped when the cam 11 reaches the first position corresponding to the “whole core retracted state”.

  Moreover, in this electric multi-core writing instrument 1, it is possible to shift to all the writing centering / unfolding states by rotating the drive cam 11 of the writing centering / unfolding mechanism 10 in one direction. Therefore, there is no need to reversely rotate the drive cam 11, and the electric multi-core writing instrument 1 can employ an inexpensive reduction motor 20 that can rotate only in one direction. Further, according to the processing of the information processing unit 80 described above, four types of user instructions can be received by the three switches 61r, 61k, 61b of the operation unit 60. That is, according to the processing of the information processing unit 80, the switches 61r, 61k, and 61b for setting the writing cores 3r, 3k, and 3b to the writing state are provided in a one-to-one correspondence with the writing cores. It is not necessary to separately provide a switch for enabling the operation and setting the entire core retracted state, and the operation unit 60 can be simplified.

(Second Embodiment)
The electric multi-core writing instrument 101 shown in FIG. 8 includes an operation unit 160 and an information processing unit 180 instead of the operation unit 60 and the information processing unit 80 in the electric multi-core writing instrument 1. The operation unit 160 has two push button switches such as a first switch 91 and a second switch 92. A switch operation performed in a predetermined procedure is associated with each writing center in / out state. Specifically, when the first switch 91 is pressed once shorter than a predetermined time (hereinafter referred to as “single pressing operation”), the electric multi-core writing instrument 101 enters a red-core writing state. When the first switch 91 is continuously pressed twice within a predetermined time (hereinafter referred to as “twice-pressing operation”), the electric multi-core writing instrument 101 enters a black-core writing state. When the first switch 91 is continuously pressed for a predetermined time or longer (hereinafter referred to as “long press operation”), the electric multi-core writing instrument 101 enters a blue-core writing state. Further, when the second switch 92 is pressed, the entire core is stored. The correspondence relationship between the switch operation procedure and the writing center in / out state realized is set in advance and stored in the information processing unit 180 as operation procedure setting information 182.

  The processing of the information processing unit 180 for realizing such an operation of the electric multi-core writing instrument 101 will be described with reference to FIG.

  When the information processing unit 180 receives an ON signal from the second switch 92 by a user operation (S301), the operation procedure setting information 182 is referred to, and the target signal combination to be transferred is “store all cores” It is recognized that the combination corresponding to the “state” (sensor A is OFF and sensor B is OFF) (S324). On the other hand, when the information processing unit 180 receives an ON signal from the first switch 91 (S302), the ON signal from the first switch 91 continues after a predetermined time wait process (S303). It is determined whether or not there is (S304). Such processes S303 and S304 are repeated a total of three times at the maximum.

  If the ON signal from the first switch 91 continues when the processing S303 and S304 are repeated three times, it is confirmed that the user's operation is “long pressing operation of the first switch 91”. means. Therefore, the information processing unit 180 refers to the operation procedure setting information 182 and recognizes that the target signal combination to be transferred is a combination corresponding to the “blue core writing state” (S321).

  On the other hand, if it is determined that the ON signal from the first switch 91 has been temporarily interrupted (turned OFF) in any of the above-described processing S304, the second ON signal from the first switch 91 is In order to wait, it is determined whether or not the second ON signal from the first switch has been input (S309). Here, when the second ON signal from the first switch is not input, after the wait process (S310) for a predetermined time, the second ON signal from the first switch 91 is input again. It is determined whether or not (S311). Such processes S310 and S311 are repeated a total of three times at the maximum.

  When the second ON signal is not input from the first switch 91 at the time when the processes S310 and S311 are repeated three times, the user's operation is “one push operation of the first switch 91”. Means that. Therefore, the information processing unit 180 refers to the operation procedure setting information 182 and recognizes that the target signal combination to be transferred is a combination corresponding to the “red core writing state” (S322).

  On the other hand, if it is determined in any of the repeated processing S311 that the ON signal from the first switch 91 is input, the user's operation is “press the first switch 91 twice”. means. Therefore, the information processing unit 180 refers to the operation procedure setting information 182 and recognizes that the target signal combination to be transferred is a combination corresponding to the “black core writing state” (S323).

  After any of the above processes S321, S322, S323, and S324, the information processing unit 180 drives the reduction motor 20 to rotate the encoder 54 so as to shift to the recognized target signal combination (S131). ). The details of this process S131 are as already described in FIG. As a result of the processing as described above, the encoder 54 is stopped in a state where a target signal combination is obtained, and the drive cam 11 of the writing center extending / retracting mechanism 10 is stopped, so that the target writing center extending / retracting state is achieved.

  According to such processing of the information processing unit 180, a user's instruction is input according to the operation procedure of the switches 91 and 92. Therefore, four types of users are provided with two switches 91 and 92 smaller than the number of writing cores 3. Can be accepted. Accordingly, the operation unit 160 can be simplified by reducing the number of switches. In the electric multi-core writing instrument 101, the same or equivalent components as those of the above-described electric multi-core writing instrument 1 are denoted by the same reference numerals in the drawings, and redundant description is omitted.

  The present invention is not limited to the above embodiment. For example, in the embodiment, the output shaft of the reduction motor 20 is rotated only in one direction. However, a motor capable of bidirectional rotation is adopted, and the driving cam 11 is reversely rotated as appropriate to change the writing centering state. You may do it. In this case, the writing core control means may perform a process of selecting the rotation direction of the motor so that the rotation angle of the drive cam 11 for shifting the writing core protruding and retracting state becomes small. The motor may be a stepping motor. In addition, the sensor used for the position detection unit 55 is not limited to a photosensor, and a proximity switch, a limit switch, or the like can be appropriately used for the position detection unit 55 instead of the photosensors A and B.

It is sectional drawing which shows 1st Embodiment of the electric multi-core writing instrument which concerns on this invention. It is an expanded sectional view of FIG. It is a block diagram which shows each functional element of the electric multi-core writing instrument of FIG. It is a perspective view which shows a writing center protrusion / projection mechanism. (A) is a schematic diagram showing a position detection unit, and (B) is a timing chart showing on / off of photosensors A and B. It is a flowchart which shows the process of the information processing part in the electric multi-core writing instrument of FIG. It is a flowchart figure which shows the detail of a part of process shown by FIG. It is a block diagram which shows 2nd Embodiment of the electric multi-core writing instrument which concerns on this invention. It is a flowchart which shows the process of the information processing part in the electric multi-core writing instrument of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 ... Electric multi-core writing instrument, 2 ... Shaft cylinder, 3 ... Writing core, 3r ... Red core, 3k ... Black core, 3b ... Blue core, 10 ... Writing core protrusion / extraction mechanism (writing core control means), 20 ... Deceleration Motor (writing core control means), 55... Position detection section (protruding state detection means), 60, 160... Operation section (operation reception means), 61r, 61k, 61b, 91, 92. Writing core control means).

Claims (5)

In the electric writing instrument that allows the writing core to appear and disappear by the driving force of the motor,
An axial tube that houses a plurality of the writing cores;
Operation accepting means for accepting an operation by a user;
Writing core control means for controlling the protruding and protruding states of the plurality of writing cores based on the operation received by the operation receiving means, while causing the writing core to protrude from the tip of the shaft cylinder by the driving force of the motor;
An electric multi-core writing instrument comprising: The writing core control means includes:
When the operation accepting unit accepts a core selection operation for selecting any of the plurality of writing cores, the writing core selected by the core selection operation protrudes from the tip of the shaft tube,
When the operation accepting unit accepts a lead storing operation for storing all of the plurality of writing cores, the motor is driven so that all the writing cores are buried in the shaft cylinder. The electric multi-core writing instrument according to claim 1. The operation receiving means is
A plurality of switches corresponding to each of the plurality of writing cores;
The writing core control means includes:
3. The motor according to claim 1, wherein the motor is driven so that the writing core corresponding to the switch operated by a user among the plurality of switches is protruded from a tip end of the shaft cylinder. Electric multi-core writing instrument. It further comprises an in / out state detection means for detecting the in / out state of the plurality of writing cores,
The writing core control means includes:
When the type of the writing core corresponding to the switch operated by the user and the type of the writing core detected as currently protruding from the tip of the shaft cylinder by the appearance state detecting means match,
The electric multi-core writing instrument according to any one of claims 1 to 3, wherein the motor is driven so that all the writing cores are buried in the shaft cylinder. The operation receiving means is
Having fewer switches than the number of the writing cores,
The writing core control means includes:
When the operation accepting means detects an operation of the switch performed in a predetermined operation procedure, the motor is driven so that the writing core corresponding to the operation procedure protrudes from the tip of the shaft cylinder. The electric multi-core writing instrument according to claim 1 or 2, characterized in that:

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