Writing instrument

Abstract

To provide a writing instrument that prevents a writing tip and an ink supply portion from coming into contact with each other when not needed, and from failing to come into contact when needed, by properly setting an urging force that urges the writing tip and the ink supply portion in a direction separating them from each other.SOLUTION: Provided is a writing instrument including a barrel and a tip holding member provided on the front side of the barrel so as to slide in a front-rear direction. The tip holding member includes a writing tip integrally provided at a front end of the tip holding member. The barrel includes an ink supply portion housed inside the barrel and capable of supplying ink to the writing tip. An urging force is applied to the barrel and the tip holding member in a direction separating them from each other. When the barrel approaches the tip holding member against the urging force, the ink supply portion comes into contact with the writing tip from the rear side and is capable of supplying ink, and the urging force is smaller than the weight of the barrel.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a writing instrument. [Background technology]

[0002] Conventionally, there is known a writing instrument that has a writing tip and an ink supply unit that supplies ink to the writing tip, in which the writing tip and the ink supply unit are arranged to be relatively movable in the front-rear direction, and the writing tip and the ink supply unit are biased in directions that move them away from each other (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-134393 A Summary of the Invention [Problem to be solved by the invention]

[0004] The writing instrument described in Patent Document 1 above does not take into consideration the setting of the biasing force, and when the biasing force is weak, if the tip of the writing instrument (the side on which the writing tip is placed) is pointed upward (in the direction against gravity), the writing tip will move down due to its own weight and come into contact with the ink supply unit. Conversely, when the biasing force is strong, when the writing tip is held and writing is performed, the weight of the ink supply unit does not allow the ink supply unit to move down to a position where it will come into contact with the writing tip, making it impossible to write.

[0005] Therefore, the objective of the present invention is to provide a writing instrument that prevents the writing tip and ink supply part from coming into contact when not needed, and prevents the writing tip and ink supply part from not coming into contact when needed, by appropriately setting the biasing force that biases the writing tip and ink supply part in the direction of moving them away from each other. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration. A writing instrument comprising a barrel and a tip holding member provided on the front side of the barrel so as to slide in a front-rear direction, the tip holding member includes a writing tip integrally provided at a front end of the tip holding member, The barrel includes an ink supply unit that is accommodated inside the barrel and is capable of supplying ink to the writing tip, A biasing force is applied to the barrel and the tip holding member in a direction away from each other, When the barrel approaches the tip holding member against the biasing force, the ink supply portion contacts the writing tip from the rear side to supply ink, The biasing force is smaller than the weight of the barrel. A writing instrument characterized by:

[0007] In order to solve the above problems, the present invention has the following configuration. A writing instrument comprising a barrel and a tip holding member provided on the front side of the barrel so as to slide in a front-rear direction, the tip holding member includes a writing tip integrally provided at a front end of the tip holding member, The barrel includes an ink supply unit that is accommodated inside the barrel and is capable of supplying ink to the writing tip, A biasing force is applied to the barrel and the tip holding member in a direction away from each other, When the barrel approaches the tip holding member against the biasing force, the ink supply portion contacts the writing tip from the rear side to supply ink, The biasing force is greater than the weight of the tip holding member. A writing instrument characterized by: Effect of the Invention

[0008] The writing instrument of the present invention can provide a writing instrument in which the writing tip and the ink supply section do not come into contact when not required, and the writing tip and the ink supply section do not fail to come into contact when required, by appropriately setting the biasing force applied to the barrel and the tip holding member in a direction separating them from each other. [Brief description of the drawings]

[0009] [Figure 1] 1 is a vertical cross-sectional view of a writing instrument A according to an embodiment of the present invention. [Diagram 2] 1A is an exploded perspective view of a main part of a writing instrument A according to an embodiment of the present invention, and FIG. [Diagram 3] 1A and 1B are longitudinal cross-sectional views of a main portion of a writing instrument A according to an embodiment of the present invention, in which (a) shows a state before a writing tip 30 is pressed against a writing surface X, and (b) shows a state after the writing tip 30 has been pressed against the writing surface X. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] <Embodiment> DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In this specification, the barrel axis direction means the direction along the barrel centerline, and the barrel circumferential direction means the direction around the barrel centerline. In addition, "front" means one side of the barrel axis direction in the direction in which the writing tip protrudes, and "rear" means the opposite side to the one side. In addition, in this specification, the radial direction of the barrel means the diameter direction of the barrel perpendicular to the center line of the barrel, the outer radial direction of the barrel means the direction away from the center of the barrel along the radial direction of the barrel, and the inner radial direction of the barrel means the direction toward the center of the barrel along the radial direction of the barrel.

[0011] [Overall configuration] The writing instrument A comprises a barrel 10, a tip holding member 20 that protrudes forward from the barrel 10 and is arranged to slide in the front-to-back direction relative to the barrel 10, a writing tip 30 that is integrally formed on the front end side of the tip holding member 20 so as to eject ink when pressed against a writing surface X, a biasing member 40 that biases the tip holding member 20 forward relative to the barrel 10, and a plurality of ink supply portions 50 that supply different types of ink to the single writing tip 30 from the rear side. With this writing instrument A, the writing tip 30 is held in a spaced-apart position (see FIG. 3(a)) away from the ink supply part 50 and forward, and when a specified operation is performed, it moves rearward to a contact position (see FIG. 3(b)) where it contacts the ink supply part 50 from the front side. Here, in the illustrated example, the predetermined operation is an operation of pressing the writing tip 30 against the surface X to be written on.

[0012] [Shaft tube] The shaft tube 10 is a long cylindrical member extending in the front-rear direction. The barrel 10 is formed in a long cylindrical shape with the ink supply section 50 inside, and is integrally provided at its front end with a cap mounting section 11 for mounting the cap 70, a slide support section 12 for slidably supporting the tip holding member 20 forward of the cap mounting section 11, and a relay core holding section 13 for holding the relay core 52 of the ink supply section 50 so as to protrude forward forward of the slide support section 12, and the ink supply section 50, which will be described later, is fixed and held inside. The rear end opening of the barrel 10 is closed by a removable tail plug 60. That is, barrel 10 includes an ink supply portion 50 housed therein and a tail plug 60 attached to the rear end portion. Although the illustrated example of the barrel 10 is made up of a single cylindrical body, in other examples it is possible to use a configuration in which a plurality of cylindrical bodies are connected together.

[0013] The cap attachment portion 11 is a substantially cylindrical portion whose diameter is reduced relative to the rear cylindrical portion, and is formed so as to be inserted into the cap 70 . An annular projection 11a for fitting over the engagement / disengagement projection 71 of the cap 70 rearward is provided on the outer circumferential surface of the cap attachment portion 11. The annular projection 11a has a mountain-like shape in vertical cross section and is continuous around the entire circumference of the cap attachment portion 11. The portion of the cap attachment portion 11 in front of the cap attachment portion 11 is a cylindrical surface without any irregularities.

[0014] The slide support portion 12 is a substantially cylindrical portion whose diameter is reduced relative to the cap mounting portion 11 . A retaining protrusion 12a that prevents the tip holding member 20 from slipping out is provided on the outer circumferential surface of the slide support part 12. In the slide support part 12, the portion in front of the retaining protrusion 12a and the portion behind the retaining protrusion 12a are cylindrical surfaces without any irregularities. The retaining projection 12 a has a mountain-like shape in vertical section with the rear side surface inclined more steeply than the front side surface, and is continuous along the entire circumference of the slide support portion 12 .

[0015] The intermediate core holding portion 13 is a substantially cylindrical portion whose diameter is reduced compared to the slide support portion 12 . The outer peripheral surface of this intermediate core holding part 13 is inserted into the urging member 40 and functions as a guide surface for the expanding and contracting urging member 40. In addition, a step portion 13a which is the boundary between the intermediate core holding part 13 and the slide support part 12 functions as a receiving surface for receiving the rear end of the urging member 40. The relay core holding portion 13 is provided with a plurality of relay core holding holes 14 (two in the illustrated example) spaced apart in the radial direction, through which the relay core 52 is inserted in a penetrating manner in the front-rear direction and held so as not to be able to retreat. The relay core holding hole 14 extends into the slide support portion 12, and at a midpoint in the extending direction, a step portion 14a is provided whose inner surface narrows toward the rear so as to hold the relay core 52 so that it cannot be retracted.

[0016] [Chip holding member] The tip holding member 20 is formed in a generally bottomed cylindrical shape with the front end wall as the bottom and the rear end open, and cylindrically covers the tip side of the intermediate core 52, the slide support portion 12, and the biasing member 40, and fits the writing tip 30 into the front end side so that it cannot be moved forward or backward (see Figures 1 and 3). That is, the tip holding member 20 includes a writing tip 30 fitted to the front end side.

[0017] On the inner peripheral surface at the rear end side of this tip holding member 20, a plurality of locking projections 21 (three evenly spaced in one example of this embodiment) that lock onto the anti-slip projections 12a of the slide support portion 12 are provided at intervals in the circumferential direction. Each locking projection 21 is formed in a mountain-like shape in vertical cross section with the front side surface inclined more steeply than the rear side surface. When the tip holding member 20 is assembled to the slide support part 12, this locking projection 21 rides over the anti-pullout projection 12a of the slide support part 12 rearward and is positioned rearward of the anti-pullout projection 12a.

[0018] Further, an annular step 22 for receiving the front end of the biasing member 40 is provided on the inner peripheral surface of the front end side of the tip holding member 20 . A notch 23 is provided in the peripheral wall forward of the step 22 in the tip holding member 20 for inserting the writing tip 30 from the side, and a tip insertion hole 24 is provided in the frontmost wall of the tip holding member 20 to allow the writing tip 30 to protrude forward. The notch 23 and the tip insertion hole 24 communicate with each other in the radial direction of the barrel. The tip insertion hole 24 penetrates the front end wall portion of the tip holding member 20 in the front-rear direction.

[0019] [Writing tip] The writing tip 30 is a fiber bundle made of numerous synthetic fibers, and is integrally provided with a base 31 located within the tip holding member 20 and a pen tip portion 32 that protrudes forward and has a smaller radial dimension than the base 31, and in the illustrated example is formed into a horizontal T-shaped piece (see Figures 1 and 2). As shown in FIG. 2, this writing tip 30 is fitted into the cutout portion 23 of the tip holding member 20 from the outside in the barrel diameter direction, with the pen tip portion 32 exposed forward and the base portion 31 inside the tip holding member 20. When no writing pressure is applied to the writing tip 30 (see FIG. 3(a)), the writing tip 30 is held in a spaced, forward, and spaced apart position relative to the ink supply unit 50, which will be described later, so that ink is not supplied from the ink supply unit 50. In addition, when the writing tip 30 is pressed against the writing surface X, for example, and writing pressure is applied (see Figure 3 (b)), the writing tip 30 retreats relative to the barrel 10 and comes into contact with the intermediate core 52 of the ink supply section 50 from the front side. As other examples of the writing tip 30, it is possible to make the tip shape other than the illustrated examples, such as a bullet shape, a cylinder shape, or a wedge shape.

[0020] [Forced member] The biasing member 40 is a compression coil spring provided between the step 22 on the front side of the tip holding member 20 and the step 13a at the front end of the slide support part 12 in the barrel 10. The biasing member 40 biases the tip holding member 20 and the barrel 10 in directions away from each other. The rear end of this biasing member 40 is fitted into the intermediate core holding portion 13 in an annular shape to cylindrically cover both intermediate cores 52, 52 described below, and biases the tip holding member 20 forward relative to the barrel tube 10, thereby maintaining the writing tip 30 in the separated position.

[0021] [Ink supply unit] A plurality of ink supply units 50 (two in the illustrated example, aligned in the radial direction of the barrel) are provided around the central axis of the barrel 10. Each ink supply section 50 includes a long cylindrical ink storage section 51 that extends over substantially the entire length of the barrel 10, and a relay core 52 that extends forward from the front end of the ink storage section 51.

[0022] The ink storage section 51 is a thin cylindrical body made of synthetic resin that contains a large number of synthetic fibers. One of the two ink storage sections 51 and the other one are impregnated with ink of different colors. Each ink storage section 51 is located within the barrel 10 between a step 10a located at the rear end of the slide support section 12 and the rear end face within the tail plug 60 described below, and is held so that it hardly moves back and forth.

[0023] Each relay core 52 is a fiber bundle made of a large number of synthetic fibers, and is formed into a long cylindrical shape tapered toward the rear end. The rear end side of this relay core 52 is press-fitted from the front side into the ink storage section 51. Moreover, a middle portion in the longitudinal direction of the relay core 52 is held by the relay core holding hole 14 so that it cannot be retracted. The front end side of the relay core 52 protrudes forward from the relay core holding portion 13 and extends forward within the urging member 40 , with its frontmost end portion being located forward of the front end of the urging member 40 .

[0024] It should be noted that the porosity (void ratio) of the writing tip 30, the ink storage section 51, and the relay core 52 increases in the order of the writing tip 30, the relay core 52, and the ink storage section 51. According to a preferred example of this embodiment, the porosity of the writing tip 30 is about 65%, the porosity of the relay core 52 is about 76%, and the porosity of the ink storage portion 51 is 90%.

[0025] [Tail plug] The tail plug 60 is formed in a bottomed cylindrical shape with the rear end being the bottom wall portion, and is detachably and hermetically press-fitted into the rear end side of the barrel 10. The tail plug 60 is detached when replacing the ink supply unit 50, etc.

[0026] [cap] The cap 70 is formed in a bottomed cylindrical shape with its front end being the bottom wall portion, and is detachably and hermetically fitted to the cap attachment portion 11 on the front end side of the barrel 10 . The cap 70 has an inner peripheral surface at the rear end thereof with an engaging / disengaging protrusion 71 which rides over the annular protrusion 11a of the cap mounting part 11 rearward to be engaged therewith, and an annular protrusion 72 which is in close contact with the outer peripheral surface of the cap mounting part 11 over its entire circumference forward of the engaging / disengaging protrusion 71. A clip 73 is also provided on the outer peripheral side.

[0027] [Effects] The characteristic functions and effects of the writing instrument A having the above configuration will now be described in detail. When a user holds the barrel 10 and positions the writing instrument A so that the tip holding member 20 is facing down, the weight of the tip holding member 20 including the writing tip 30 (the combined weight of the tip holding member 20 and the writing tip 30: hereinafter simply referred to as the weight of the tip holding member 20) and the biasing force of the biasing member 40 cause the base 31 of the writing tip 30 to be in a separated position so as not to come into contact with the front ends of the relay cores 52 of the multiple ink supply portions 50. In this separated position, as shown in Figure 3(a), a gap S is secured between the rear end face of the tip holding member 20 and the step 11b on the front end side of the barrel 10, and a gap S' is secured between the rear end face of the base 31 of the writing tip 30 and the front end faces of the intermediate cores 52 of the multiple ink supply sections 50. Therefore, in this separated position, the ink flows from the ink reservoir 51 to the relay core 52 but does not reach the writing tip 30.

[0028] When a user holds the barrel 10 and writes, the force (writing pressure) applied to the barrel 10 by the user's fingers causes the barrel 10 to move close to the tip holding member 20 against the biasing force of the biasing member 40, and to a contact position where the tips of the relay cores 52 of the multiple ink supply units 50 contact the rear end surface of the base 31 of the writing tip 30. At this contact position, the rear end surface of the base 31 of the writing tip 30 and the front end surfaces of the relay cores 52 of the multiple ink supply units 50 are pressed against each other, so that ink is supplied from the ink storage unit 51 to the pen tip unit 32 via the relay cores 52 and the base 31, making it possible to write continuously. At this contact position, the gap S between the rear end surface of the tip holding member 20 and the step portion 11b on the front end side of the barrel 10 becomes smaller, but is still secured. In other words, it is designed so that S>S'. With this configuration, the rear end surface of the tip holding member 20 abuts against the step portion 11b on the front end side of the barrel 10 before the rear end surface of the base 31 of the writing tip 30 comes into contact with the front end surfaces of the relay cores 52 of the multiple ink supply units 50, preventing the rear end surface of the base 31 of the writing tip 30 from being unable to come into contact with the front end surfaces of the relay cores 52 of the multiple ink supply units 50. In this embodiment, since inks of different colors are stored in the multiple ink supply units 50, the applied lines are either gradation lines made of multiple colors of ink or lines of a color that is a mixture of multiple colors of ink.

[0029] Thereafter, when the user lifts the writing implement A and the writing tip 30 separates from the written surface X, the tip holding member 20 advances to the above-mentioned separated position due to the weight of the tip holding member 20 and the biasing force of the biasing member 40. As a result, ink is no longer supplied from the relay core 52 to the writing tip 30.

[0030] In the above description, the user holds the barrel 10 while writing. However, the user may hold the tip holding member 20, which is located closer to the tip of the writing instrument A, while writing. In this case, depending on the magnitude of the biasing force of the biasing member 40, the biasing force of the biasing member 40 may not allow the barrel 10 to come sufficiently close to the tip holding member 20, and the tip of the intermediate core 52 of the ink supply section 50 may not come into contact with the rear end surface of the base 31 of the writing tip 30, making it impossible to write continuously. In other words, continuous writing is not possible unless the barrel 10 is close to the tip holding member 20 and resists the biasing force of the biasing member 40 with only the weight of the barrel 10 including the ink supply section 50 and the tail plug 60 (the combined weight of the barrel 10, the ink supply section 50, and the tail plug 60: hereinafter simply referred to as the weight of the barrel 10) and the tip of the intermediate core 52 of the ink supply section 50 comes into contact with the rear end surface of the base 31 of the writing tip 30. Therefore, in this embodiment, the biasing force of the biasing member 40 is set to be smaller than the weight of the barrel 10 so that the barrel 10 is close to the tip holding member 20 due to the weight of the barrel 10 alone, and the tip of the intermediate core 52 of the ink supply section 50 contacts the rear end surface of the base 31 of the writing tip 30. The ink in the ink supply unit 50 contained in the barrel 10 decreases as the writing instrument A is used, and the weight of the barrel 10 also decreases. Therefore, it is preferable to set the biasing force of the biasing member 40 so as to be smaller than the weight of the barrel 10 in a state in which the writing instrument A cannot write due to a decrease in ink. The barrel 10 may include other components in addition to the ink supply unit 50 and the tail plug 60. The barrel 10 moves together with all these components relative to the tip holding member 20. The weight of the barrel 10 refers to the total weight of the barrel 10 and all these components, that is, the total weight applied to the urging member 40 from the barrel side.

[0031] Furthermore, when the barrel 10 is held with the tip holding member 20 facing up, when the tip holding member 20 is placed in a pen stand with the tip holding member 20 facing up, when the clip 73 of the cap 70 is inserted in a pocket, or in other words when the tip holding member 20 is placed above the barrel 10, the weight of the tip holding member 20 is applied to the urging member 40. At this time, depending on the magnitude of the urging force of the urging member 40, the tip holding member 20 may resist the urging force of the urging member 40 with just its weight and approach the barrel 10, and the tip of the relay core 52 of the ink supply unit 50 may come into contact with the rear end surface of the base 31 of the writing tip 30. Then, even when the pen is not in use, ink is supplied from the ink reservoir 51 of the ink supply unit 50 to the pen tip 32 of the writing tip 30 due to capillary action.

[0032] At this time, particularly if the cap 70 is not attached, ink may evaporate from the pen tip portion 32 of the writing tip 30, reducing the amount of ink stored in the ink supply portion 50 or causing the ink to dry out, making it impossible to write with. Furthermore, even if the cap 70 is attached, ink of one of the colors in the ink supply units 50 that store ink of different colors may move from that ink supply unit 50 via the relay core 52 and the writing tip 30 to the ink supply units 50 of other colors, causing multiple colors of ink to mix together in the ink supply unit 50 or to mix together to become different colors, resulting in writing lines that are not intended by the user. In other words, when the pen is unused, it is preferable that the tip of relay core 52 of ink supply unit 50 does not come into contact with the rear end surface of base 31 of writing tip 30 . Therefore, in this embodiment, the biasing force of the biasing member 40 is set to be greater than the weight of the tip holding member 20 so that the tip of the intermediate core 52 of the ink supply section 50 does not come into contact with the rear end surface of the base 31 of the writing tip 30 due to the weight of the tip holding member 20 alone, being close to the barrel 10. It should be noted that the tip holding member 20 may include other components in addition to the writing tip 30. The tip holding member 20 moves together with all these components relative to the barrel 10. The weight of the tip holding member 20 refers to the total weight of the tip holding member 20 and all these components, in other words, the total weight applied to the biasing member 40 from the tip holding member 20 side.

[0033] As described above, with the writing instrument A of this embodiment, when writing, ink from the ink supply section 50 can be supplied to the writing tip 30 regardless of where the writing instrument A is gripped, and when not writing, ink from the ink supply section 50 can be prevented from being supplied to the writing tip 30 regardless of the state of the writing instrument A.

[0034] [Variations] In the above embodiment, a plurality of ink supply units 50 are provided for a single writing tip 30, but a configuration in which only one ink supply unit 50 is provided for a single writing tip 30 may also be used. Furthermore, in the above embodiment, the ink supply units 50 each store a different type of ink. However, as another example, the ink supply units 50 may each store the same type of ink.

[0035] In the above embodiment, a compression coil spring is used as the biasing member 40, but the biasing member 40 may also be an elastic body such as rubber.

[0036] In the above embodiment, the writing tip 30 is indirectly urged forward via the tip holding member 20, but it is also possible to omit the tip holding member 20, engage the writing tip 30 with the barrel 10 so that it can slide back and forth, and urge the writing tip 30 forward directly by the urging member 40.

[0037] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the gist of the present invention.

[0038] The writing instrument A according to an embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the present invention also includes design changes that do not deviate from the gist of the present invention. [Explanation of symbols]

[0039] 10 shaft cylinder 10a Stepped section 11 Cap attachment part 11a Annular protrusion 11b Stepped section 12 Slide support 12a Stopper protrusion 13 Relay core holder 13a Stepped section 14 Relay core holding hole 14a Stepped section 20 Chip holding member 21 Locking protrusion 22 Step section 23 Notch 24 Chip insertion hole 30 Writing Tip 31 Base 32 Pen tip 40 biasing member 50 Ink supply unit 51 Ink storage unit 52 Relay core 60 Plug 70 Cap 71 Engaging and disengaging projection 72 Annular projection 73 Clip A Writing instrument S Gap S’ Gap X Writing surface

Claims

1. A writing instrument comprising a barrel and a tip holding member provided on the front side of the barrel so as to slide in a front-rear direction, the tip holding member includes a writing tip integrally provided at a front end of the tip holding member, The barrel includes an ink supply unit that is accommodated inside the barrel and is capable of supplying ink to the writing tip, A biasing force is applied to the barrel and the tip holding member in a direction away from each other, When the barrel approaches the tip holding member against the biasing force, the ink supply portion contacts the writing tip from the rear side to supply ink, The biasing force is smaller than the weight of the barrel. A writing instrument characterized by:

2. A writing instrument comprising a barrel and a tip holding member provided on the front side of the barrel so as to slide in a front-rear direction, the tip holding member includes a writing tip integrally provided at a front end of the tip holding member, The barrel includes an ink supply unit that is accommodated inside the barrel and is capable of supplying ink to the writing tip, A biasing force is applied to the barrel and the tip holding member in a direction away from each other, When the barrel approaches the tip holding member against the biasing force, the ink supply portion contacts the writing tip from the rear side to supply ink, The biasing force is greater than the weight of the tip holding member. A writing instrument characterized by:

3. A writing instrument comprising a barrel and a tip holding member provided on the front side of the barrel so as to slide in a front-rear direction, the tip holding member includes a writing tip integrally provided at a front end of the tip holding member, The barrel includes an ink supply unit that is accommodated inside the barrel and is capable of supplying ink to the writing tip, A biasing force is applied to the barrel and the tip holding member in a direction away from each other, When the barrel approaches the tip holding member against the biasing force, the ink supply portion contacts the writing tip from the rear side to supply ink, The writing implement, wherein the biasing force is smaller than the weight of the barrel and larger than the weight of the tip holding member.

4. 4. The writing implement according to claim 1, wherein the biasing force is applied by a biasing member provided between the barrel and the tip holding member.

5. 5. The writing implement according to claim 4, wherein the biasing member is a compression coil spring.

6. 4. The writing implement according to claim 1, wherein the barrel includes a plurality of the ink supply portions that supply different types of ink.

Images