JP2013244728A - Retractable applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retractable applicator of which a shaft diameter can be reduced.SOLUTION: An applicator (a pen point 5) is protruded from a shaft tube or is retracted in the shaft tube by moving a core member 3 axially by an operation means. A plate cam 28 (a cam part) formed by rotating shaft parts 39, 39 and a pressing piece part 40 is arranged as the operation means. The pressing piece part of the plate cam 28 directly or indirectly presses the core member 3 to an opening side by changing a position, and directly or indirectly inhibits movement of the core member 3 to a retraction side. The plate cam 28 is positioned on a side of the core member 3.

Description

  The present invention relates to a retractable applicator provided with a mechanism for an applicator to move in and out of a shaft tube.

  2. Description of the Related Art Conventionally, a retractable applicator is known that uses a pen tip (applying body) protruding from a shaft cylinder when in use, and stores the pen tip in the shaft cylinder when not in use. For example, there are various ballpoint pens such as water-based ballpoint pens, oil-based ballpoint pens, gel-type ballpoint pens, marker pens, fluorescent pens, etc., and when these are carried and carried, the pen tip is stored in the shaft cylinder. By doing so, it is possible to prevent unintentional contact of the coated body with clothes, etc., so that it is easy to use.

  In such a retractable applicator, for example, a cam mechanism disclosed in Patent Document 1 is known as a mechanism for retracting the pen tip. Patent Document 1 discloses a ballpoint pen (applicator) in which a rotating cam, a cam bar, and a cam main body storing them are arranged so as to surround an outer periphery of a refill (core member). The ballpoint pen is configured such that when the cam bar is knocked, the rotating cam rotates, and the pen tip protrudes and retracts from the outer cylinder.

Japanese Utility Model Publication No. 6-32394

  However, a ballpoint pen (applicator) that employs such a cam mechanism has a problem in that the shaft diameter of the portion in which the cam mechanism is incorporated becomes thick, and a ballpoint pen with a small diameter cannot be provided. That is, the rotating cam surrounds the outer peripheral portion of the core member, and the cam main body surrounds the outer peripheral portion of the rotating cam, so that the portion where the cam mechanism is arranged becomes thick. Thus, if the ball-point pen becomes thicker than necessary, it may adversely affect the ease of holding, the ease of writing (ease of use), the design, etc. in providing the applicator.

  Therefore, in view of the above-described problems of the prior art, the present invention provides a retractable applicator capable of reducing the shaft diameter even when the pen tip is retracted by a cam mechanism, and with that, it is easy to hold. It is an object of the present invention to provide a retractable applicator that is easy to write (easy to use) and has little concern about adverse effects on the design.

  The invention according to claim 1 for solving the above-described problems includes: a shaft cylinder having a hollow portion formed therein and having a tip opened; and a core member disposed in the shaft cylinder and having an application body at the tip. And a retractable applicator having operating means for moving the core member in the axial direction and causing the applying body to protrude and retract from the opening of the shaft tube, wherein the operating means includes a cam portion, and the cam portion has a posture. The pressing piece has a pressing piece portion that directly or indirectly presses the core member directly or indirectly to the opening side by changing and prevents the core member from moving to the retracting side directly or indirectly. The part is a retractable applicator characterized in that it is a small piece located on the side of the core member.

The “small piece” includes a “plate-shaped body” such as a thin plate, a “bar-shaped body”, and a solid body formed by integrating a plurality of “bar-shaped bodies”.
The cam portion of the retractable applicator according to the present invention is a small piece in which a pressing piece portion that directly or indirectly presses the core member toward the opening side of the shaft tube is located on the side of the core member. It has a possible structure. In this way, the cam portion can be made more compact in size, and the shaft diameter can be reduced even if the cam portion is positioned on the side of the core member, compared to a structure that employs a rotating cam that surrounds the core member in an annular shape. Is possible. As a result, the degree of freedom in design of the outer shape is improved, and it is possible to provide a retractable applicator with higher design.
Further, by reducing the shaft diameter, it is possible to provide a retractable applicator that is easy to hold and use (easy to write) even for a user with a small hand. In other words, since the change width of the shaft diameter can be widened, it is possible to manufacture a retractable applicator with various shaft diameters, and it is possible to provide a retractable applicator that is easy to hold and use (easy to write) for various users. Become.
In addition, since the pressing piece portion is positioned on the side, the entire cam portion can be positioned on the side of the core member, and therefore the axial length of the applicator can be compared with the configuration in which the cam is positioned behind the core member. Can be shortened.

  In the present invention, the pressing piece portion is rotated relative to the shaft tube to change its posture, and the rotation axis of the pressing piece portion is substantially the axial direction of the shaft tube. It is desirable to intersect perpendicularly (Claim 2).

  A third aspect of the present invention is the retractable applicator according to the first or second aspect, wherein the pressing piece has a substantially “L” plate shape.

  According to this configuration, the cam portion (pressing piece portion) can have a simple structure, so that the manufacture of the cam portion and the assembly of the retractable applicator are facilitated.

  According to a fourth aspect of the present invention, the operation means has an operation portion that is partially exposed to the outside from the shaft cylinder, and moves the operation section along the axial direction of the shaft cylinder, 4. The retractable applicator according to claim 1, wherein the posture of the pressing piece is changed.

In the invention according to claim 4, a part has an operation part exposed to the outside from the shaft cylinder, and the cam part (pressing piece) is moved by moving the operation part along the axial direction of the shaft cylinder. Part) can be changed. As described above, when the configuration of the cam part is changed in conjunction with the separately formed operation part, the part exposed to the outside of the operation part that the user actually operates is positioned away from the cam part, It can be formed at any position close to the cam portion. That is, the position where the user actually operates can be determined without depending on the position of the cam portion. Therefore, it becomes possible to arrange an operation part in the position where a user can operate easily, and the operativity of the operation | movement of the application body can be improved.
Further, by providing the operation portion separately from the cam portion, the shape of the portion that is actually operated by the user can be determined more freely than in the case where they are integrally formed. As a result, it is possible to make the operation portion into a shape that is easy for the user to operate, and the operability of the application operation of the application body is improved.

  According to a fifth aspect of the present invention, the operation portion has two protruding piece portions protruding in a direction substantially perpendicular to the moving direction of the operation portion main body, and the core member application body is the shaft member. In a state of protruding to the outside, a part of the pressing piece portion is located between the two protruding piece portions, and in a state in which the application body of the core member is retracted into the shaft member, 5. The retractable applicator according to claim 4, wherein the pressing piece is at a position deviated from between the two protruding pieces.

  In the invention described in claim 5, the posture changing operation of the cam portion (pressing piece portion) is performed by the two protruding piece portions. As described above, when the cam portion is operated with the two protruding pieces, the posture of the cam portion can be changed more reliably than when the cam portion is operated with the single protruding piece. Therefore, it is possible to reliably prevent the problem that the posture changing operation of the cam portion stops in the middle, so that the moving operation of the application body can be performed more smoothly.

  According to a sixth aspect of the present invention, the operating means includes a slide member integrally attached to the core member, and the slide member includes a pressed piece portion and a core member pressing portion, and the pressed member When the piece is pressed against the pressing piece, the core member pressing portion presses the core member from the rear, and the core member moves in the axial direction of the axial tube together with the slide member, When the core member pressing portion is pressed by the core member, the pressed piece portion is in contact with the pressing piece portion, thereby preventing the axial movement of the core member and the slide member. The retractable applicator according to any one of claims 1 to 5.

In invention of Claim 6, it has the slide member integrally attached to the core member, and the to-be-pressed piece part which is a part of slide member is pressed by the cam part (pressing piece part). The core member pressing portion presses the core member from the rear, and the core member moves in the axial direction of the shaft tube together with the slide member. That is, even in the state where the cam portion is arranged on the side of the core member, the core member can be moved by pressing the core member from the rear along with the operation of the cam portion.
Here, in the configuration in which the core member is directly pressed by the cam portion, it is necessary to form a portion for engaging the cam portion on the core member. On the other hand, according to the configuration in which the operation of the cam portion is interlocked via the slide member between the cam portion and the core member as in the present invention, a commonly used core member can be adopted, so that a new dedicated core is used. There is no need to manufacture a member, and the manufacturing cost of the retractable applicator can be reduced.
In addition, by separately providing the cam portion and the member that presses the core member, the position where the cam portion is disposed and the position where the core member is pressed can be set to different positions. For this reason, the core member can be pressed from the rear side where force can be easily transmitted to the core member regardless of the arrangement position of the cam portion. Thereby, since the force from the cam portion is efficiently transmitted to the core member, a large force is not required for the protrusion operation of the core member, and the protrusion operation of the application body can be performed more smoothly.
Furthermore, in this invention, when a core member press part is pressed by the core member, a to-be-pressed piece part contact | abuts to a cam part, and the movement to the axial direction of a core member and a slide member is blocked | prevented. In other words, even if a force is applied to the core member by writing pressure or the like and the slide member is pressed, the slide member comes into contact with the cam portion at a position different from the pressed portion to prevent the movement of the core member.
As a result, the portion (the pressed piece portion) that is pressed from the core member of the slide member is formed in a portion that is easy to receive the force from the core member (rear side from the core member) regardless of the position of the cam portion. be able to. Therefore, the movement of the core member can be prevented easily and reliably.

  A seventh aspect of the present invention is the retractable applicator according to the sixth aspect, wherein the pressed piece portion is located on a side of the core member.

  In the invention according to claim 7, the axial length of the retractable applicator is compared with the configuration in which the pressed piece portion is located on the side of the core member and the pressed piece portion is positioned behind the core member. Can be shortened.

  In the retractable applicator of the present invention, the pressing piece for directly or indirectly pressing the core member is a small piece located on the side of the core member, and the cam portion can be further reduced in size. It has a configuration. Therefore, the shaft diameter can be reduced even if the cam portion is positioned on the side of the core member.

It is a perspective view which shows the ball-point pen of 1st Embodiment of this invention. It is a disassembled perspective view which shows the ball-point pen of FIG. It is a partially broken perspective view which shows the state which looked at the front side cylinder part of FIG. 2 from the rear side. It is a perspective view which shows the state which looked at the rear side cylinder part of FIG. 2 from another direction. It is a perspective view which shows the operation part of FIG. It is a perspective view which shows the operation part seen from the direction different from FIG. It is a perspective view which shows the cam part of FIG. It is a right view of the cam part of FIG. It is a perspective view which shows the core body moving member of FIG. FIG. 10 is a left side view of the core body moving member of FIG. 9. FIG. 10 is a plan view of the core body moving member of FIG. 9. It is explanatory drawing which shows the assembly procedure of the ball-point pen of FIG. 1, (a) shows the state by which the core moving member was attached to the core member, (b) shows the cam member and operation of the core member and the core moving member. The state arrange | positioned inside the axial cylinder with the part is shown. It is a cross-sectional perspective view which shows the cam part vicinity of the ball-point pen of FIG. It is a perspective view which shows the internal structure of the ball-point pen of FIG. It is explanatory drawing which shows the operation | movement which protrudes the pen tip of the ball-point pen of FIG. 1 outside, and a pen tip protrudes in order of (a)-(c). It is explanatory drawing which shows the operation | movement which retracts the pen tip of the ball-point pen of FIG. 1 inside, and a pen tip retracts in order of (a)-(c). It is a perspective view which shows the ball-point pen of 2nd Embodiment of this invention. It is sectional drawing which shows the ball-point pen of FIG. It is a perspective view which shows the operation part of FIG. FIG. 20 is a perspective view showing an operation unit viewed from a direction different from that in FIG. 19. It is a right view which shows the operation part of FIG. It is a perspective view which shows the cam part of FIG. It is a perspective view which shows the cam part seen from the back different from FIG. FIG. 24 is a cross-sectional perspective view showing the cam portion of FIG. It is a perspective view which shows the core body moving member of FIG. It is explanatory drawing which shows the assembly procedure of the ball-point pen of FIG. 17, and shows the state by which the core body movement member was attached to the core member. FIG. 27 is an explanatory diagram showing the procedure for assembling the ballpoint pen following FIG. 26, and shows the attachment positions of the cam portion and the operation portion. It is a perspective view which shows the internal structure of the ball-point pen of FIG. It is explanatory drawing which shows the operation | movement which makes the pen point of the ball-point pen of FIG. 17 protrude outside, and a pen point protrudes in order of (a)-(c). It is explanatory drawing which shows the operation | movement which retracts the pen tip of the ball-point pen of FIG. 17 inside, and a pen tip retracts in order of (a)-(c).

  Further embodiments of the present invention will be described below. In the following description, the front-rear relationship will be described with the pen tip side as the front side and the pen shaft side as the rear side. The relationship between the top, bottom, left and right will be described with reference to the state shown in FIG.

  As shown in FIG. 1 and FIG. 2, the ballpoint pen 1 (protruding type applicator) of the first embodiment of the present invention includes a shaft cylinder 2 that is a main body, and a core member 3 disposed inside the shaft cylinder 2. , And operating means 4 for moving the core member 3 along the axial direction of the shaft cylinder 2. Then, when the user operates the operation unit 27 of the operation means 4, the core member 3 moves along the axial direction of the shaft cylinder 2, and the pen tip 5 (applicator body) provided at the front end portion of the core member 3 is moved. ) In and out of the shaft cylinder 2.

  The shaft cylinder 2 includes a pen tip forming part 7, a front side cylinder part 8, and a rear side cylinder part 9. A space is formed in the nib forming part 7, the front cylinder part 8, and the rear cylinder part 9, and each space includes a nib forming part 7, a front cylinder part 8, and a rear part. When the side cylinder part 9 is attached integrally, it will be in the state which connected.

  As shown in FIG. 2, the pen tip forming portion 7 is a portion located at the front end of the shaft tube 2, and the outer shape is substantially a truncated cone shape with a tip portion of the cone cut out, and becomes narrower toward the front end. It is a diameter. At the front end portion of the pen tip forming portion 7, an opening 12 is formed which communicates the internal space of the pen tip forming portion 7 with the outside and serves as a protruding opening for the pen tip 5.

The front cylinder portion 8 is a cylinder having an opening in the front-rear direction, and an operation portion sliding groove 14 that penetrates the side surface and communicates the internal space with the outside is provided on the side surface thereof. The operation portion sliding groove 14 has an approximately rectangular opening shape and extends along the axial direction of the front cylinder portion 8 (shaft tube 2).
Here, when attention is paid to the inner peripheral surface of the rear end portion of the front cylindrical portion 8, as shown in FIG. 3, the mounting engagement groove 15 and the first cam locking groove are formed in the upper portion and the lower portion thereof. 16 are formed. Further, a stepped portion 18 is formed at the rear end portion of the inner peripheral surface of the front side cylinder portion 8.

  The mounting engagement groove 15 is a groove having a substantially rectangular cross section and extending from the rear end toward the front side (from the front side to the back side in FIG. 3).

  Here, in a portion substantially facing the mounting engagement groove 15, more specifically, in a portion slightly displaced in the circumferential direction of the front tube portion 8 from a position facing the mounting engagement groove 15, the front tube portion 8 A cutout portion 17 is formed by cutting the side surface from the rear end toward the front side (front side to back side in FIG. 3). The first cam locking groove 16 is located in the vicinity of the rear end portion of the notch 17.

  The first cam locking groove 16 is a groove that extends further rearward from the rear end of the notch 17 and has a substantially rectangular shape in plan view. Specifically, the front end (the end on the back side in FIG. 3) of the first cam locking groove 16 is rounded and convex forward.

The stepped portion 18 is a part of the inner peripheral surface of the front cylindrical portion 8 and has a stepped outer shape. In the stepped portion 18, a plurality of surfaces 18 a, 18 b, and 18 c are continuous through a step in a direction substantially orthogonal to the axial direction of the front cylindrical portion 8.
More specifically, the stepped portion 18 is provided at a position adjacent to the first cam locking groove 16, and the first surface 18 a and the second surface 18 b from the first cam locking groove 16 side. , The third surface 18c is continuously formed through a step. And when the front side cylinder part 8 is the attitude | position shown by FIG. 3, the 1st surface 18a will be in the lowest position (lower side in FIG. 3), the 1st surface 18a, the 2nd surface 18b, and the 3rd surface. The height increases in the order of 18c.

  The rear cylinder portion 9 has a substantially cylindrical shape with the front end opened and the rear end closed. Here, as shown in FIG. 4, a rectangular plate-like protruding plate portion 20 that protrudes forward in a horizontal state is formed on the upper side of the portion on the front end side of the rear cylinder portion 9. Further, an insertion tube portion 21 is formed below the projecting plate portion 20 so that the outer shape thereof is a shape in which a part of the cylinder is cut out and has a substantially “C” cross section and extends in the front-rear direction. Yes. A plate-like inner standing plate portion 22 extending in the front-rear direction in an upright state is formed on the lower side of the protruding plate portion 20.

Here, a second cam locking groove 23 is formed in a portion located slightly rearward of the front end of the inner upright plate portion 22.
The second cam locking groove 23 is a groove having a substantially rectangular planar shape formed on the side surface located on the outer side among the side surfaces facing the left and right direction of the inner upright plate portion 22 and extends in the vertical direction. . As for this 2nd cam latching groove 23, the lower end has reached the lower surface of the inner side standing board part 22, and the downward direction is the open state. The upper end portion of the second cam locking groove 23 is rounded upward and convex.

  In addition, an outer standing plate portion 24 extending in the front-rear direction in an upright state is formed at a position away from the inner standing plate portion 22 to the outside. The outer standing plate portion 24 is formed to face the inner standing plate portion 22 and extends in parallel with the inner standing plate portion 22. For this reason, between the outer standing plate part 24 and the inner standing plate part 22, there is formed an operation groove part 25 that has a substantially rectangular cross section and extends in the front-rear direction and is convex downward.

  Next, the operation means 4 which is a characteristic configuration of the present embodiment will be described.

  As shown in FIG. 2, the operation means 4 is configured to operate the operation unit 27 for manual operation by the user, a plate cam 28 (cam unit) that follows manual operation on the operation unit 27, and the operation of the plate cam 28. Accordingly, a core body moving member 29 (sliding member) that slides in the axial direction of the barrel 2 is provided.

  As shown in FIG. 5, the operation unit 27 includes a main body 32 that is a plate body that curves upward and extends in the front-rear direction, and a top surface of the main body 32 at the front end side portion of the main body 32. And an operating projection 33 (projecting piece) that extends downward from a lower side portion of the main body 32 at the rear end side portion of the main body 32. That is, the operation protrusion 33 and the two operation protrusions 34 are formed at positions separated in the front-rear direction.

  The main body 32 is a plate that extends in the front-rear direction in a curved state so that the center portion in the left-right direction is the highest and both end portions in the left-right direction are the lowest. The curvature of the lower surface (inner surface) of the main body 32 is substantially the same as the curvature of the outer peripheral surface of the core member 3 (see FIG. 2). For this reason, when the main body 32 is brought into contact from the outside of the core member 3, the lower surface (inner surface) of the main body 32 and the outer peripheral surface of the core member 3 can be brought into close contact with each other without a substantial gap.

  As shown in FIGS. 5 and 6, the operation protrusion 33 is a substantially rectangular parallelepiped protrusion extending rearward from a portion slightly rearward of the front end of the main body 32.

  As shown in FIG. 5, the operating protrusion 34 is a one-side end portion in the left-right direction on the rear end side of the main body portion 32, and is a piece-like body that curves and extends downward from a portion located at the lower end thereof. It is a protrusion. More specifically, as shown in FIGS. 5 and 6, the operation protrusion 34 is formed integrally with the main body portion 32, and extends along the bending direction of the main body portion 32. At this time, the curvature of the outer surface of the operating protrusion 34 is substantially the same as the outer surface (upper surface) curvature of the main body 32, and the outer surface of the operating protrusion 34 and the outer surface (upper surface) of the main body 32. Is in a state where the same surface curved in an arc shape is formed. Similarly, the curvature of the inner side surface of the operating projection 34 is substantially the same as the curvature of the inner side surface (lower side surface) of the main body portion 32, and the inner side surface of the operating projection 34 and the inner side surface (lower side surface) of the main body portion 32. Is a state in which the same surface curved in an arc shape is formed.

  Further, as shown in FIG. 5, a protruding portion 35 that protrudes outward is formed on the outer side of the lower end portion of the operating protrusion 34. In other words, the protruding portion 35 is a portion protruding along the left-right direction (a direction substantially orthogonal to the front-rear direction) at the lower end portion of the main body portion of the operating protrusion 34. That is, the operation protrusion 34 is formed by a main body portion extending downward and a protrusion 35 protruding sideward from the lower end portion of the main body portion, and a protrusion extending in the front-rear direction with a substantially “L” cross-sectional shape. It has become.

  Here, two actuating projections 34 are provided on the side of the rear end side portion of the main body 32, and the two actuating projections 34 (34a, 34b) are arranged in parallel at intervals in the front-rear direction. Yes. More specifically, a first operating protrusion 34a formed slightly forward from the rear end of the main body 32 and a second operating protrusion 34b formed at a portion continuous with the rear end of the main body 32 are provided. They are arranged in parallel.

  As shown in FIGS. 7 and 8, the plate cam 28 is formed by rotating shaft portions 39 and 39 and a pressing piece portion 40, and the outer shape is a substantially “L” plate shape. More specifically, the plate cam 28 includes a pressing piece portion 40 erected so that the side view is substantially “L”, and rotating shaft portions 39 and 39 projecting outward from the side surface of the pressing piece portion 40. Is formed by. Here, the pressing piece portion 40 has a rectangular flat plate-like main body portion 37 positioned on the front side, and a protrusion 38 that protrudes rearward from the lower end of the rear end surface of the main body portion 37.

  Here, on the front end portion of the top surface of the main body portion 37, an upper surface protruding portion 37 a that is raised from the periphery and protrudes upward is formed. More specifically, the upper surface protruding portion 37a is a protrusion having a substantially semicircular cross section and extending in the left-right direction. Moreover, the corner | angular part is notched in the rear-end part of the top | upper surface of the main-body part 37, and the inclined surface used as a downward slope toward back is formed.

Further, on both side surfaces of the main body portion 37, rotary shaft portions 39, 39 are formed at the front lower side portions, respectively. Specifically, in each of both side surfaces of the main body portion 37, a portion that is slightly rearward from the front end and slightly above the lower end, that is, a portion that is slightly closer to the center than the corner portion on the front lower side of the side surface of the main body portion 37. A rotary shaft 39 is formed on the surface.
The rotary shaft portions 39 and 39 are projecting portions having a substantially cylindrical outer shape, and project substantially perpendicularly from both side surfaces of the main body portion 37 toward the outside. More specifically, the two rotation shaft portions 39 formed on both side surfaces of the main body portion 37 are in positions facing each other with the main body portion 37 interposed therebetween, and protrude in directions away from each other in the left-right direction.

  The protruding portion 38 is a substantially rectangular plate-like portion that protrudes substantially vertically from the rear end surface of the main body portion 37 toward the rear, and is a substantially rectangular parallelepiped portion. As shown in FIG. 8, the corner portion on the lower rear side of the protrusion 38 is cut away, and an inclined surface that is inclined upward is formed at the rear end portion of the lower surface of the protrusion 38. Has been.

  The plate cam 28 and, as a result, the raw material of the operation means 4 are not particularly limited, and examples thereof include metals and synthetic resins. Here, when the plate cam 28 or the like is formed of a synthetic resin, it is desirable to adopt what is called an engineering plastic in terms of strength. Examples of the engineering plastic include polyamide, polyacetal, fluororesin, polycarbonate, polybutylene terephthalate, polyimide, polyphenylene ether, and ultrahigh molecular weight polyethylene. Of these, polyamide, polyacetal, fluororesin, and ultra-high molecular weight polyethylene are more preferable for realizing smooth operation because they have good sliding properties. Furthermore, a polyacetal resin is still more preferable from the viewpoints of slipperiness during operation, strength, and cost.

  By the way, when the plate cam 28 is formed of polyacetal resin, if the operation protrusions 34 of the operation portion 27 that are in contact with the plate cam 28 at the time of operation are formed of polyacetal resin, noise will be generated when they are rubbed together during operation. There is a case. Therefore, when the plate cam 28 is formed of a polyacetal resin, it is desirable that the operating projections 34 and the like that are in contact with the plate cam 28 during operation are formed of a resin different from the polyacetal resin. More specifically, an ABS resin or the like can be preferably used as a resin different from the polyacetal resin.

  As shown in FIGS. 9 and 10, the core body moving member 29 is positioned between the pressed piece portion 42 formed on the front end side, the mounting cylinder portion 43 formed on the rear end side, and between them. The connecting portion 44 is integrally formed.

  As shown in FIGS. 9 and 10, the pressed piece portion 42 is a plate body having a substantially trapezoidal shape in a side view, and is formed on the front end side of the core body moving member 29. The pressed piece portion 42 is formed such that the top surface is substantially perpendicular to the height direction (vertical direction), and the bottom surface is inclined downward. That is, in the pressed piece portion 42, the length in the vertical direction of the rear end surface is longer than the front end surface. Further, the pressed piece portion 42 is arranged so that the upper end is located above the upper end of the connecting portion 44.

As shown in FIG. 9 and FIG. 10, the mounting cylinder portion 43 is a cylindrical body with a part of the side face notched in the longitudinal direction (front-rear direction), and has a substantially “C” cross section and extends in the front-rear direction. The side surface forming portion 43a and the disc-shaped rear end disc portion 43b (core member pressing portion) are integrally formed.
More specifically, in the side surface forming portion 43a (the side wall of the mounting cylinder portion 43), the portion located behind the pressed piece portion 42 is cut out by a length of about one third of the circumference. Yes. The inner peripheral surface of the rear end portion of the side surface forming portion 43a and the outer peripheral surface of the rear end disc portion 43b are continuous, and the rear end disc portion 43b is substantially perpendicular to the front-rear direction and the left-right direction. Is erected. At this time, the curvature of the inner surface of the side surface forming portion 43a is substantially the same as the curvature of the outer peripheral surface of the core member 3 (see FIG. 2).

As shown in FIGS. 9 and 10, the connecting portion 44 is a plate that protrudes forward from a part of the front end surface of the mounting tube portion 43 and extends in the front-rear direction in a curved state.
More specifically, the connecting portion 44 is curved in the same bending direction as the mounting cylinder portion 43 located at the rear, and the outer peripheral surface of the connecting portion 44 and the outer peripheral surface of the mounting cylinder portion 43 have substantially the same curvature. Yes, forming the same plane. Further, the inner peripheral surface of the connecting portion 44 and the inner peripheral surface of the mounting tube portion 43 also have substantially the same curvature and form the same plane. The connecting portion 44 is a curved plate-like portion extending in the front-rear direction with an arc-shaped cross section that is slightly longer than a quarter of the circumference.

Here, at the connecting portion front end 44a, the length in the left-right direction is long as shown in FIG. That is, as shown in FIG. 9, the connecting portion front end 44 a further extends in the bending direction from other portions of the connecting portion 44, and has a curved plate shape extending in the front-rear direction in a substantially semicircular shape. At this time, in the connecting portion front end 44a, both end portions in the left-right direction are the highest positions, and the center portion in the left-right direction is the closest position. And in the one side edge part side of the left-right direction of this connection part front end 44a, the to-be-pressed piece part 42 is integrally provided in the outer peripheral surface.
Since the pressed piece portion 42 is located at the front end of the core body moving member 29 in this way, the rear end disk portion 43b of the mounting cylinder portion 43 located at the rear end of the core body moving member 29 is provided. Is separated in the front-rear direction (longitudinal direction of the core body moving member 29).

  Next, an assembly configuration of the ballpoint pen 1 of the present embodiment will be described.

  As shown in FIG. 12A, the ballpoint pen 1 of the present embodiment is in a state in which the core body moving member 29 is integrally attached to the core member 3. At this time, the rear portion of the core member 3 is inserted into the inner side of the mounting cylinder portion 43 of the core body moving member 29. Furthermore, the rear end disk part 43b of the mounting cylinder part 43 is in a state of being in contact from the rear side of the rear end face of the core member 3, and the side surface forming part 43a is in a state of surrounding the outer peripheral surface of the core member 3 in an annular shape. Yes. And the to-be-pressed piece part 42 of the core body moving member 29 is located in the side vicinity of the center of the longitudinal direction (front-back direction) of the core member 3. Specifically, the pressed piece portion 42 is attached to the side of the core member 3, and the inner side surface of the pressed piece portion 42 is in contact with the outside of the core member 3. At this time, the front end surface and the rear end surface of the pressed piece portion 42 and the outer peripheral surface of the core member 3 are substantially perpendicular.

  Then, as shown in FIG. 12B, the core member 3 and the core body moving member 29 are provided with a plate cam 28 behind the pressed piece portion 42 of the core body moving member 29, and the front end of the core member 3. It is arranged in the shaft cylinder 2 in a state where the operation part 27 is arranged above the side portion.

  Here, in a state where the rear cylinder portion 9 is inserted behind the front cylinder portion 8, the first cam locking groove 16 (see FIG. 3) of the front cylinder portion 8 and the second cam of the rear cylinder portion 9. The locking groove 23 (see FIG. 4) is at a position facing in the left-right direction (see FIG. 13). At this time, the two rotary shaft portions 39 and 39 (see FIGS. 7 and 13) formed on both side surfaces of the plate cam 28 are inserted into the first cam locking groove 16 and the second cam locking groove 23, respectively. Has been. Thus, the plate cam 28 is attached to the shaft cylinder 2 so as to be rotatable.

More specifically, in each of the front cylinder part 8 and the rear cylinder part 9, the rear portion of the first cam locking groove 16 of the front cylinder part 8 is opened (see FIG. 3). The lower portion of the second cam locking groove 23 of the portion 9 is opened (see FIG. 4). Therefore, it is possible to slide the rotary shaft portions 39, 39 of the plate cam from the opened portions.
And if the rear side cylinder part 9 is inserted in the front side cylinder part 8 and these are attached integrally, the outer side standing plate part of the rear side cylinder part 9 from the rear side of the first cam locking groove 16 of the front side cylinder part 8 The front end surface 24a of 24 (refer FIG. 4) contact | abuts. As a result, the rear portion of the first cam locking groove 16 is closed.
Moreover, when the rear side cylinder part 9 is inserted in the front side cylinder part 8 and these are integrally attached, the second surface of the stepped part 18 is formed on the lower surface of the front end side part of the inner standing plate part 22 (see FIG. 4). 18b (refer FIG. 3) contacts from the lower side. As a result, the lower portion of the second cam locking groove 23 is closed.
That is, in the state where the rear cylinder portion 9 is inserted behind the front cylinder portion 8, the open portion of the first cam locking groove 16 formed in the front cylinder portion 8 is the outer vertical plate of the rear cylinder portion 9. Blocked by the part 24. And the open part of the 2nd cam latching groove 23 formed in the rear side cylinder part 9 is obstruct | occluded by the step-shaped part 18 of the front side cylinder part 8. FIG. That is, the front cylindrical portion 8 and the rear cylindrical portion 9 are in a state of closing the locking grooves (the first cam locking groove 16 and the second cam locking groove 23) provided on the other side.
Thus, by attaching the front side cylinder part 8 and the rear side cylinder part 9 together, the open portions of the first cam locking groove 16 and the second cam locking groove 23 are respectively closed, The plate cam 28 is attached so as to be rotatable without falling off.

  As shown in FIG. 14, when the plate cam 28 stands upright so that the protrusion 38 (see FIG. 7) of the plate cam 28 is positioned rearward, a part of the rear side of the plate cam 28 is the shaft cylinder 2. The operation groove 25 is inserted.

Therefore, in the present embodiment, the plate cam 28 and the plate-like pressed piece portion 42 pressed by the plate cam 28 are positioned in the side portion of the core member 3.
According to such a cam mechanism (a mechanism for performing the protruding and retracting operation of the pen tip 5) in which a thin plate-like cam such as the plate cam 28 is arranged on the side of the core member 3, the refill (core member 3) is annular. Compared with the conventional rotary cam arranged so as to surround, the portion related to the cam mechanism in the side portion of the core member 3 can be reduced in size. As a result, the shaft diameter of the ballpoint pen 1 can be reduced without reducing the thickness of the refill (core member 3).
As described above, when the cam portion has a structure that can be further miniaturized, the weight of the retractable applicator can be reduced.
Further, according to the structure in which the plate cam 28 is provided on the side of the core member 3, the ballpoint pen can be used without shortening the length of the refill (core member 3) as compared with the structure in which the cam is provided on the rear side of the refill. The axial length of 1 can be shortened.
By the way, when a relatively heavy conventional cam such as the rotary cam is provided in the vicinity of the tip of the retractable applicator or in the vicinity of the tail, the center of gravity of the retractable applicator is greatly biased toward the end in the longitudinal direction. May end up. Then, when the user uses the retractable applicator in his / her hand, there is a possibility that it is difficult to use (it is difficult to write). On the other hand, since the retractable applicator of the present embodiment can be reduced in weight by reducing the cam portion, the bias of the center of gravity in the longitudinal direction of the retractable applicator is small and easy to use (easy to write) A type applicator can be provided.

  And the operation part 27 is located above the front part of the core member 3, as FIG. 12, FIG. 14 shows. More specifically, the operation portion 27 is attached to the core member 3, and the outer peripheral surface of the core member 3 is in close contact with the curved lower surface (see FIG. 6) of the main body portion 32 in the operation portion 27.

  At this time, the two operating projections 34, 34 of the operation unit 27 are both located behind the plate cam 28. More specifically, the lower ends of the operating protrusions 34 are located behind the plate cam 28. The operating protrusions 34 are also in close contact with the outer peripheral surface of the core member 3 on the inner surface thereof.

  Further, as shown in FIG. 1, the operation protrusion 33 of the operation portion 27 protrudes from the operation portion sliding groove 14 of the shaft tube 2 to the outside.

  As shown in FIG. 12B, a biasing member 47 such as a spring is disposed inside the front side of the shaft tube 2, and the core member 3 is constantly biased rearward by the biasing member 47. It has become.

  Above, description about the assembly structure of the ball-point pen 1 of this embodiment is complete | finished.

  The ballpoint pen 1 of this embodiment can make the pen tip 5 appear and disappear by sliding the operation protrusion 33 of the operation unit 27 exposed to the outside of the barrel 2 in the front-rear direction. Hereinafter, the operation of the pen tip 5 in the present embodiment will be described in detail.

  First, an operation for projecting the pen tip 5 from the shaft cylinder 2 will be described.

  In a state where the pen tip 5 of the ballpoint pen 1 is inside the shaft cylinder 2 (in the pen tip forming portion 7), when the operation projection 33 of the operation unit 27 is moved forward, the operation projection 33 of the operation unit 27 becomes the shaft cylinder. It slides forward along the two operation part sliding grooves 14. Along with this, the main body 32 of the operation unit 27 also slides forward with the lower surface in close contact with the outer peripheral surface of the core member 3. As the main body 32 moves forward, the two operating protrusions 34 and 34 located behind the operation protrusion 33 also move forward.

When the two operating protrusions 34 and 34 are moved forward, the operating protrusion 34a positioned at the front first comes into contact with the upper portion of the rear end surface of the plate cam 28, as shown in FIG.
Here, as described above, the rotating shaft portion 39 of the plate cam 28 is formed below the front end of the plate cam 28. That is, the rear end upper side where the operating projection 34a abuts is greatly separated from the lower front end where the rotation shaft portion 39 is located. More specifically, the portion where the operating projection 34a abuts and the portion where the rotation shaft portion 39 is formed are located in the vicinity of each end portion in the front-rear direction, and in the vicinity of each end portion in the up-down direction. positioned.

  When the operating projection 34a moves forward as it is, the operating projection 34a presses the rear end upper portion of the plate cam 28 forward. Thus, when the operation protrusion 34a presses the plate cam 28 forward, the plate cam 28 starts rotating with the rotation shaft portion 39 as the rotation axis. More specifically, the plate cam 28 rotates so that the front end surface faces the lower side, the top surface faces the front side, and the rear end surface faces the upper side, and the side surface side (left side surface side) on which the plate cam 28 is located. And rotates clockwise as viewed from the front of FIG. In other words, the plate cam 28 rotates vertically from the rear to the front.

  Thus, in the present embodiment, the plate cam 28 is rotated behind the operation projection 33, which is a portion that is directly operated by the user.

  Further, in the present embodiment, as described above, the portion where the plate cam 28 is pressed by the operating projection 34a and the rotation shaft portion 39 which is the rotation shaft of the plate cam 28 are separated in the front-rear direction and the vertical direction, respectively. It is in a state far away. In other words, the portion serving as the power point when the plate cam 28 rotates and the portion serving as the fulcrum are greatly separated. For this reason, it becomes possible to rotate the plate cam 28 with a small force by increasing the moment of force, and a large force is not required to change the posture of the plate cam 28. That is, the ballpoint pen 1 of the present embodiment does not require a large force to operate the operation unit 27 and has good operability.

  Then, when the plate cam 28 pressed by the operation protrusion 34a of the operation unit 27 is rotated, as shown in FIG. 15 (b), the upper surface protruding portion formed in the vicinity of the front end of the top surface of the plate cam 28. 37a contacts the rear end surface of the pressed piece 42. At this time, the upper surface of the upper surface protruding portion 37 a that comes into contact with the pressed piece portion 42 is a curved surface, and the curved portion comes into contact with the pressed piece portion 42. As the plate cam 28 further rotates, the contact position between the curved portion of the upper surface protruding portion 37a and the pressed piece portion 42 changes, and the plate cam 28 changes its posture. . Accordingly, the pressed piece portion 42 is pressed forward by the plate cam 28.

  Here, in this embodiment, the part which contacts the to-be-pressed piece part 42 of the plate cam 28 is a curved surface. Therefore, when the posture of the plate cam 28 is changed while pressing the pressed piece portion 42, the plate cam 28 and the pressed piece portion 42 are brought into contact with each other through a curved surface, and the substantially linear contact state is maintained. Move. According to such a configuration, even when the plate cam 28 and the pressed piece portion 42 move while being in contact with each other, the contact position of the plate cam 28 and the pressed piece portion 42 moves smoothly along the curved surface. I will do it. Therefore, smooth rotation of the plate cam 28 can be realized.

  At this time, when the plate cam 28 is rotated, the projection 38 of the plate cam 28 moves upward as shown in FIG. 15B, and the two operating projections 34 (34a, 34b) are moved. Located between. More specifically, the first operation protrusion 34a, the protrusion 38, and the second operation protrusion 34b are sequentially positioned from the front. In this state, the operation portion 27 further moves forward, so that the second operating protrusion 34b contacts the protrusion 38 from the rear. More specifically, in a state where the protrusion 38 is moved upward, the lower surface of the protrusion 38 (the lower surface in the posture of FIG. 15A) faces rearward, and the second operation protrusion is on the rearward surface. The front end surface of 34b contacts.

  Then, when the operation unit 27 moves forward as it is, the second operation projection 34 b presses the projection 38. That is, first the first operating projection 34 a presses the main body 37 of the plate cam 28, and then the second operating projection 34 b further presses the protruding portion 38 of the plate cam 28. The plate cam 28 rotates approximately 90 degrees from the posture (hereinafter also referred to as the retracted posture) in the state where the pen tip 5 is retracted into the shaft cylinder 2 (the state shown in FIG. 15A), and the posture is changed. Is completed (the posture in which this posture change is completed is also referred to as a protruding posture hereinafter). In this way, by pressing the plate cam 28 with the two protrusions (operation protrusions 34a and 34b), the plate cam 28 can be reliably changed in posture without stopping in the middle of rotation.

When the posture change of the plate cam 28 is completed, the contact position between the plate cam 28 and the pressed piece 42 is moved forward as compared to before the posture change. In other words, the contact position with the pressed piece portion 42 in the protruding posture is ahead of the contact position with the pressed piece portion 42 in the retracted posture. Thus, the pressed piece portion 42 and the core body moving member 29 integrated with the pressed piece portion 42 are moved forward from the retracted posture. The core member 3 integrally attached to the core body moving member 29 is also moved forward together with the core body moving member 29 against the biasing force of the biasing member 47. More specifically, when the pressed piece portion 42 pressed by the plate cam 28 moves forward, the entire core body moving member 29 is moved forward. At this time, since the rear end disc portion 43b of the core body moving member 29 is also moved forward, the core member 3 pressed against the rear end disc portion 43b from the rear is also applied to the biasing force of the biasing member 47. It will be in the state which moved to the front against it.
That is, along with the posture change of the plate cam 28, the core body moving member 29, which is pressed forward by the pressed piece portion 42 by the plate cam 28, moves forward, and the rear end is moved by the movement of the core body moving member 29. The core member 3 whose part is pressed forward moves forward. In other words, the core body moving member 29 and the core member 3 both move forward with the change in the posture of the plate cam 28. When the posture change of the plate cam 28 is completed, the forward movement of the core body moving member 29 and the core member 3 is also completed.

  As described above, in the present embodiment, the pressed piece portion 42 pressed by the plate cam 28 is located on the side portion of the core member 3, and the rear end disk portion 43 b that presses the core member 3 forward. Is located at the rear end of the core member 3.

  Then, the nib member 3 pressed by the core body moving member 29 moves forward, so that the pen tip 5 protrudes from the shaft tube 2 to the outside.

  Here, in a state where the pen tip 5 protrudes from the shaft cylinder 2 to the outside, the pen tip 5 moves backward even if a force toward the rear side acts on the pen tip 5 due to a writing pressure during use. It does not move. More specifically, when the nib 5 and the core member 3 formed integrally with the nib 5 try to move backward, the rear end disk portion 43b of the core body moving member 29 moves backward. Be blocked. When the core member 3 tries to move rearward together with the core body moving member 29, the pressed piece portion 42 comes into contact with the plate cam 28, and the movement is prevented. As a result, the ballpoint pen 1 of the present embodiment is in a state in which the pen tip 5 does not move backward unless the operation unit 27 is operated.

  More specifically, the plate cam 28 in the protruding posture is in a state in which the upper surface protruding portion 37a is positioned at the lower front portion thereof as shown in FIG. The portion where the portion 37a is located is a position displaced from the rotating shaft portion 39 in a substantially parallel direction toward the front. When the plate cam 28 is in the protruding position, the rear end surface of the pressed piece portion 42 is in contact with the upper surface protruding portion 37a. For this reason, when a force is applied to the plate cam 28 from the pressed piece portion 42 toward the rear side, a force from the front to the rear is applied to the upper surface protruding portion 37a. That is, in this case, the force applied to the plate cam 28 is a force directed from the outside toward the rotary shaft portion 39 in the direction along the axial direction (front-rear direction) of the shaft tube 2. As a result, even if a rearward force is applied from the pressed piece portion 42 to the plate cam 28, the plate cam 28 does not rotate and the posture is not changed. Therefore, the backward movement of the core body moving member 29 can be prevented.

  Next, the operation of retracting the pen tip 5 into the shaft cylinder 2 will be described.

  In a state where the pen tip 5 of the ballpoint pen 1 protrudes from the shaft cylinder 2 (pen tip forming portion 7) to the outside (the state shown in FIG. 15C), the operation protrusion 33 of the operation portion 27 is moved backward. Then, the operation projection 33 of the operation unit 27 slides backward along the operation unit sliding groove 14 of the shaft cylinder 2. Accordingly, the lower surface of the main body 32 of the operation unit 27 slides backward with the outer surface of the core member 3 being in close contact. As the main body portion 32 moves rearward, the two operating projections 34 and 34 located behind the operation projection 33 also move rearward.

  When the two operating protrusions 34 and 34 move rearward, as shown in FIG. 16A, the rear end surface of the operating protrusion 34a located in the front is a surface facing the front side of the protruding portion 38 of the plate cam 28 ( It touches the top surface in the retracted posture. Then, as the operating projection 34a moves rearward as it is, the projecting portion 38 is pressed against the operating projection 34a, and the plate cam 28 starts to rotate with the rotating shaft portion 39 as the rotating shaft. At this time, the rotation direction of the plate cam 28 is opposite to the rotation direction when the pen tip 5 protrudes from the shaft cylinder 2, in other words, the side surface side where the plate cam 28 is located (the left side surface side, It rotates counterclockwise when viewed from the front of FIG. That is, the plate cam 28 rotates vertically from the front to the rear.

  When the plate cam 28 is rotated, as shown in FIG. 16 (b), the upper surface protruding portion 37 a of the plate cam 28 comes into contact with the upper portion of the rear end surface of the pressed piece portion 42. Then, the protruding portion 38 of the plate cam 28 moves downward.

From this state (the state shown in FIG. 16B), the protrusion 38 is further pressed backward by the operating protrusion 34a, and the upper protrusion 37a of the plate cam 28 is moved backward by the pressed piece 42. When pressed, the plate cam 28 further rotates.
More specifically, as described above, the core body moving member 29 is integrally attached to the core member 3. Therefore, when the core member 3 is pressed backward by the urging member 47, the core moving member 29 pressed by the core member 3 is also in a state where a force directed backward is applied. As a result, the pressed piece portion 42 of the core moving member 29 presses the plate cam 28 backward.

  As the plate cam 28 rotates, the lower surface of the plate cam 28 comes into contact with the bottom surface of the operation groove 25 (see FIG. 4) of the shaft cylinder 2, and the rotation of the plate cam 28 stops. As a result, the plate cam 28 is in the retracted posture with the top surface facing upward (see FIG. 16C), and the posture change of the plate cam 28 is completed.

When the posture change of the plate cam 28 is completed, the contact position between the plate cam 28 and the pressed piece portion 42 is moved rearward compared to before the posture change of the plate cam 28. That is, the contact position with the pressed piece portion 42 in the retracted posture is behind the contact position with the pressed piece portion 42 in the protruding posture.
More specifically, the core member 3 is always pressed backward by the urging force of the urging member 47. Therefore, the core moving member 29 that is in contact with the core member 3 is also always pressed backward. Then, the backward movement of the core member 3 and the core body moving member 29 due to the pressing force is prevented by bringing the pressed piece portion 42 which is a part of the core body moving member 29 into contact with the plate cam 28. Yes. That is, when the core member 3 and the core body moving member 29 try to move backward by the pressing force, the pressed piece portion 42 that is a part of the core body moving member 29 comes into contact with the plate cam 28 and moves backward. Movement is blocked.
Therefore, by changing the posture from the posture when the plate cam 28 protrudes, when the portion that becomes the front end of the plate cam 28 (the portion that contacts the rear end of the pressed piece portion 42) moves backward, The core member 3 and the core body moving member 29 that are always pressed rearward move rearward, and the pressed piece 42 abuts against the portion that is the front end of the plate cam 28. Therefore, when the posture of the plate cam 28 is changed, the contact position between the plate cam 28 and the pressed piece portion 42 is moved backward, and the core member 3 and the core body moving member 29 are moved. Move backwards.
For these reasons, when the plate cam 28 changes its posture, the contact position of the plate cam 28 and the pressed piece portion 42 moves rearward accordingly, and the core member 3 and the core body moving member 29 and move backward. When the posture change of the plate cam 28 is completed, the backward movement of the core member 3 and the core body moving member 29 is also completed.

  In this way, the nib 5 is retracted into the shaft cylinder 2 by moving the core member 3 pressed by the urging member 47 backward.

In the above-described embodiment, the example in which the plate cam 28 is used as the cam portion is shown, but the present invention is not limited to this. A ballpoint pen 101 (an in / out type applicator) according to a second embodiment different from the above-described embodiment will be described in detail below with reference to the drawings.
In the following description, the front-rear relationship will be described with the pen tip side as the front side and the pen shaft side as the rear side. Further, the relationship between the upper, lower, left and right will be described with reference to the state shown in FIG. Moreover, about the member similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 17, the ballpoint pen 101 according to the second embodiment includes a shaft tube 102 that is a main body, a core member 103 disposed inside the shaft tube 102, and the core member 103 in the axial direction of the shaft tube 102. And operating means 104 for moving along. Then, when the user operates the operation unit 127 of the operation unit 104, the core member 103 moves along the axial direction of the shaft tube 102, and the pen tip 5 provided at the front end portion of the core member 103 is moved to the shaft tube. It is configured to appear and disappear from the inside and outside of 102.

  The shaft cylinder 102 is configured by a pen tip forming portion 107 located at the front end portion and a cylinder main body portion 108.

  As shown in FIGS. 17 and 18, the pen tip forming portion 107 is a portion located at the front end of the shaft cylinder 102, and the outer shape is substantially a truncated cone shape, and the diameter decreases toward the front end. . At the front end portion of the pen tip forming portion 107, an opening 112 is formed which communicates the internal space of the pen tip forming portion 107 with the outside and serves as a protruding port for the pen tip 5.

  As shown in FIG. 17, the cylinder main body portion 108 is provided with an operation portion sliding groove 114 that penetrates the side surface and communicates the internal space with the outside at a portion on the front end side of the side surface. The operation portion sliding groove 114 is a two-stage groove, and includes a first groove 114a that is recessed in an outer shape from the periphery, and an opening that extends through the bottom surface of the first groove 114a in the front-rear direction. It is formed by a second groove 114b having a substantially rectangular shape. The second groove 114b is formed at the center in the left-right direction of the first groove 114a, and is a part slightly behind the front end of the first groove 114a and a part slightly ahead of the rear end of the first groove 114a. It extends to.

  As shown in FIG. 18, the operation unit 104 is configured to operate the operation unit 127 for manual operation by the user, the solid cam 128 (cam unit) that follows manual operation on the operation unit 127, and the operation of the solid cam 128. Accordingly, a core body moving member 129 (sliding member) that slides in the axial direction of the shaft cylinder 102 is provided.

  As shown in FIG. 19, the operation unit 127 includes a substantially rectangular flat plate-shaped main body 132 extending in the front-rear direction, and an operation protrusion 133 protruding upward from the top surface of the main body 132 at the front end side portion of the main body 132. In addition, the rear end side portion of the main body portion 132 has two operating protrusions 134 (projecting piece portions) that protrude downward from the lower surface of the main body portion 132.

  As shown in FIGS. 19 and 20, the main body portion 132 has a notch 135 formed at the rear end portion thereof. The notch 135 is formed by notching a portion near the center in the left-right direction of the main body 132 in a substantially rectangular parallelepiped shape, and extends forward from the rear end. The rear end portion of the main body portion 132 is divided into two in the left-right direction by the notch portion 135, and two rectangular parallelepiped portions are in parallel with the notch portion 135 therebetween. .

  As shown in FIGS. 19 and 21, the operation protrusion 133 includes an operation protrusion main body 133 a that is an oval plate body in plan view, and a connection portion 133 b that has a substantially rectangular parallelepiped shape. The operation projection main body 133a is continuous with the upper portion of the connection portion 133b, and is integrally attached to the main body portion 132 through the connection portion 133b. The operation projection main body 133a has a front end portion that is thicker than other portions. Specifically, the portion near the front end becomes thicker toward the front end side, and the top surface portion of the operation projection main body 133a has an inclined surface with an upward gradient at the portion near the front end. Is formed.

  As shown in FIGS. 19 and 20, the operating protrusion 134 is a plate body having a substantially triangular shape in a side view, and is convex downward. In other words, the operating protrusion 134 protrudes downward from the lower surface of the main body portion 132. The operation protrusions 134 are formed one by one at positions separated from each other in the left-right direction of the main body 132 and are provided in parallel. In other words, the two operating protrusions 134 and 134 protrude downward from the respective lower surfaces of the portion divided into two by the notch 35 formed on the rear end side of the main body 132. At this time, the inner side surfaces of the two operating protrusions 134 and 134 are opposed to each other with a space therebetween, and extend in parallel in the front-rear direction.

  As shown in FIGS. 22 and 23, the three-dimensional cam 128 includes a left small piece portion 137 (pressing piece portion) and a right small piece portion 138 (pressing piece portion) that are arranged in parallel in the left-right direction and a left small piece portion 137. And a connecting part 139 that is provided between the right small piece part 138 and connects them together.

  As shown in FIG. 22, the left small piece portion 137 and the right small piece portion 138 are both substantially “L” shaped in a side view. More specifically, each of the left small piece portion 137 and the right small piece portion 138 is a cuboid (rod-shaped) portion that is erected so that the side surface shape is substantially “L” and protrudes upward. The front columnar portions 137a and 138a and the rear columnar portions 137b and 138b, which are rectangular parallelepiped (bar-shaped) portions protruding rearward, are formed so as to intersect substantially vertically. Here, a corner portion extending from the upper surface of the front columnar portions 137a and 138a to the front end surface and a corner portion extending from the upper surface of the rear columnar portions 137b and 138b to the rear end surface are cut out.

  As shown in FIG. 24, the connecting portion 139 is a portion having a substantially fan-shaped cross section and extending in the left-right direction, and is continuous with the inner side surfaces of the left small piece portion 137 and the right small piece portion 138 at both left and right ends. Yes. Specifically, the connecting portion 139 has a bottom surface and a front end surface (rear end surface in FIG. 24) that intersect substantially perpendicularly, and a rear portion (front portion in FIG. 24) has a front end surface (rear end surface in FIG. 24). A curved surface extending from the upper end to the bottom surface is formed. And the connection part 139 is each continuing with the part below the front side of the inner surface of the left small piece part 137 and the right small piece part 138, respectively. More specifically, the connecting portion 139 includes a portion where the front columnar portion 137a and the rear columnar portion 137b intersect in the left small piece portion 137, and a portion where the front columnar portion 138a and the rear columnar portion 138b intersect in the right small piece portion 138. It is continuous with the inside.

Further, as shown in FIG. 22, on the outer side surfaces of the left small piece portion 137 and the right small piece portion 138, there are formed rotary shaft portions 140 and 140 that protrude outwardly at the front lower side portions, respectively. . Specifically, the rotating shaft portions 140 and 140 are formed on the outer side surfaces of the left small piece portion 137 and the right small piece portion 138 at a portion slightly rearward from the front end and slightly above the lower end. In other words, the rotating shaft 140 is formed outside the portion where the front columnar portions 137a and 138a intersect with the rear columnar portions 137b and 138b.
The two rotary shaft portions 140 and 140 are projecting portions having a substantially cylindrical shape, and project substantially perpendicularly outward from the outer side surfaces of the left small piece portion 137 and the right small piece portion 138, respectively. At this time, the two rotating shaft portions 140 and 140 are in positions facing each other with the left small piece portion 137, the right small piece portion 138, and the connecting portion 139 interposed therebetween, and project in a direction away from each other in the left-right direction.

  As shown in FIG. 25, the core body moving member 129 includes a substantially rectangular parallelepiped pressed piece portion 142 formed at the front end, a core body posture maintaining unit 143 located behind the pressed piece portion 142, a core And a rear end disk part 144 positioned further rearward of the body posture maintaining part 143, which are integrally connected.

The pressed piece 142 has a substantially rectangular parallelepiped shape as described above, and a through hole 142a extending in the front-rear direction is formed at the center of the pressed piece 142. The through-hole 142a extends along the front-rear direction from the front end surface to the rear end surface of the pressed piece 142, in other words, penetrates the pressed piece 142 in the front-rear direction. At this time, the through hole 142a passes through the vicinity of the center of the pressed piece 142 in the vertical direction and the horizontal direction.
The pressed piece 142 has a rounded portion where the upper surface and the rear end surface are continuous. In other words, the upper surface and the rear end surface are continuous with a smooth curved surface.

  The core body posture maintaining portion 143 has a substantially cylindrical outer shape, and a through hole 143a extending in the front-rear direction is formed at the center portion thereof.

  The rear end disk part 144 is an upright disk-shaped part, and is formed so that a substantially circular surface faces the front-rear direction. A connecting protrusion 144a is formed at the center portion of the front end surface of the rear end disk portion 144, that is, the center portion of the front end surface in the vertical direction and the left-right direction, and projects substantially vertically from the front end surface to the front. Yes. The connection protrusion 144a has a substantially cylindrical outer shape.

  And the upper part of the to-be-pressed piece part 142 and the upper part of the core body attitude | position maintenance part 143 are the states which continued integrally by the connection part 129a of substantially rectangular parallelepiped shape. Furthermore, the vicinity of the upper end and the lower end of the rear end surface of the core body posture maintaining portion 143 and the vicinity of the upper end and the vicinity of the lower end of the front end surface of the rear end disc portion 144 form two substantially rectangular parallelepiped connecting portions 129b and 129c. Each is in a continuous state. At this time, the through hole 142a of the pressed piece 142 and the through hole 143a of the core body posture maintaining unit 143 have substantially the same size of opening, and are overlapped in the front-rear direction. . Furthermore, the central axis of the through-hole 142a of the pressed piece 142, the through-hole 143a of the core body posture maintaining portion 143, and the connection protrusion 144a of the rear end disc portion 144 are the same.

  Next, an assembly configuration of the ballpoint pen 101 of the present embodiment will be described.

  As shown in FIG. 26, the ballpoint pen 101 of the present embodiment is in a state in which a core body moving member 129 is integrally attached to the core member 103. More specifically, the core member 103 is inserted into the through hole 142a of the pressed piece 142 in the core body moving member 129 and the through hole 143a of the core body posture maintaining unit 143. The rear end surface of 103 is in a state in which the front end surface of the rear end disk portion 144 is in contact with the rear end surface. At this time, the connection protrusion 144a (see FIG. 25) of the rear end disk portion 144 is inserted into the rear end portion of the cylindrical core member 103.

  At this time, the pressed piece 142 is located slightly behind the longitudinal center of the core member 103, and surrounds the outer periphery of the core member 103 in an annular shape.

  And in the ball-point pen 101 of this embodiment, as shown in FIG. 26 and FIG. 27, the solid cam 128 is located behind the pressed piece 142. More specifically, the three-dimensional cam 128 has a front end surface (the front end surfaces of the connecting portion 139 and the front columnar portions 137a and 138a) close to the rear end surface of the pressed piece 142. The core member 103 is positioned between the left small piece 137 and the right small piece 138 of the three-dimensional cam 128 and above the connecting portion 139. In other words, the left small piece portion 137 and the right small piece portion 138 of the three-dimensional cam 128 are located on the sides of the core member 103 (sides in the left-right direction), respectively, and are arranged so as to face each other with the core member 103 interposed therebetween. Is done.

  Here, as described above, in the solid cam 128, the left small piece portion 137 and the right small piece portion 138, which are small pieces in which two prismatic (rod-shaped) portions are continuously formed, are connected by the connecting portion 139. Configured. In other words, the solid cam 128 is a solid cam formed by connecting two small pieces. At this time, the connecting portion 139 that connects the two small pieces also has a small piece shape. Therefore, when the three-dimensional cam 128 is disposed on the side of the core member 103, only a small piece portion is located on the side of the core member 103 (a portion close to the outer peripheral surface of the core member 103).

According to such a cam mechanism arranged with only a small piece portion located on the side of the core member 103, compared with a conventional rotary cam arranged so as to surround the refill (core member) in an annular shape. Thus, the portion related to the cam mechanism in the side portion of the core member 103 can be reduced in size. Thus, the shaft diameter of the ballpoint pen 101 can be reduced without reducing the thickness of the refill (core member 3).
In addition, by reducing the size of the three-dimensional cam 128 (cam portion), it is possible to reduce the weight of the entire ballpoint pen 101 (applicator).
Further, according to such a structure in which the solid cam 128 is provided on the side of the core member 103, the ballpoint pen can be used without shortening the length of the refill (core member 103) as compared with the structure in which the cam is provided on the rear side of the refill. The axial length of 101 can be shortened.

  At this time, the two rotary shaft portions 140 and 140 (see FIG. 22) of the three-dimensional cam 128 are inserted into holes (not shown) formed in the shaft tube 102 and attached in a rotatable state.

Further, in the ballpoint pen 101 of the present embodiment, as shown in FIGS. 27 and 28, the operation unit 127 is located above the front side portion of the core member 103 and the vicinity of the front end of the core body moving member 129. ing. At this time, as shown in FIG. 28, the two operating projections 134, 134 are located behind the pressed piece 142 and above the three-dimensional cam 128. More specifically, the two operating protrusions 134 and 134 are located behind the front columnar portions 137a and 138a of the left small piece portion 137 and the right small piece portion 138, and are formed on the rear columnar portions 137b and 138b (see FIG. 26). It is in a state located above. For this reason, the core member 103 is located between the two operating projections 134. In other words, the two operating protrusions 134 and 134 are respectively positioned on the sides of the core member 103 (sides in the left-right direction) and face each other with the core member 103 interposed therebetween.
At this time, the connecting portion 129b of the core body moving member 129 is fitted into the notch 135 formed at the rear end of the operation portion 127.

  As shown in FIG. 28, the operation projection 133 of the operation unit 127 is exposed to the outside of the shaft tube 102. More specifically, the connection portion 133b (see FIG. 21) of the operation protrusion 133 is located inside the second groove 114b that is a part of the operation portion sliding groove 114 of the shaft cylinder 102, and the operation protrusion The operation protrusion main body 133a (see FIG. 21) 133 is positioned above the second groove 114b. The operation protrusion main body 133a is in a state of being positioned inside the first groove 114a which is a part of the operation portion sliding groove 114.

  And in the ball-point pen 101 of this embodiment, as shown in FIG. 28, an urging member 147 such as a spring is disposed in front of the pressed piece 142 located at the front end of the core moving member 129. The core body moving member 129 is constantly urged backward by the urging member 147. For this reason, the core member 10 attached integrally with the core body moving member 129 is also in a state where a force toward the rear is always applied.

  Above, description about the assembly structure of the ball-point pen 101 of this embodiment is complete | finished.

  The ballpoint pen 101 of this embodiment can make the pen tip 5 appear and disappear by sliding the operation protrusion main body 133a of the operation unit 127 exposed outside the shaft tube 102 in the front-rear direction. Hereinafter, the operation of the pen tip 5 in the present embodiment will be described in detail.

  First, the operation of projecting the pen tip 5 from the shaft cylinder 102 will be described.

  When the operation projection main body 133a of the operation unit 127 is moved forward in a state where the pen tip 5 of the ballpoint pen 101 is inside the shaft cylinder 102 (in the pen tip forming unit 107), the operation projection 133 of the operation unit 127 is The cylinder 102 slides forward along the second groove 114b of the operation portion sliding groove 114 of the cylinder 102. At this time, with the movement of the operation protrusion 133, the main body 132 of the operation section 127 and the two operation protrusions 134 and 134 (see FIG. 27) also slide forward.

  When the two operating projections 134 and 134 move forward, the two operating projections 134 and 134 come into contact with the three-dimensional cam 128 from the rear as shown in FIG. 29A (see FIG. 27, left side in FIG. 29). (Not shown for the actuating projection 134 located at the position). At this time, the two operating protrusions 134 and 134 abut on the left small piece 137 and the right small piece 138 of the three-dimensional cam 128 (see FIG. 22, FIG. 29 does not show the left small piece 137). Specifically, the operating protrusion 134 abuts against the rear end surface of the front columnar portion 137a of the left small piece portion 137 and the rear end surface of the front columnar portion 138a of the right small piece portion 138, respectively.

  When the operating protrusions 134 and 134 move forward as they are, the operating protrusions 134 and 134 (see FIG. 27) are moved to the left small piece portion 137 of the three-dimensional cam 128 and the front columnar portions 137a and 138a ( The rear end face of each is pressed. As described above, the two operating protrusions 134 and 134 respectively press the left and right end portions of the three-dimensional cam 128 from the rear, whereby the three-dimensional cam 128 starts to rotate with the rotation shaft portion 140 as the rotation axis. More specifically, the solid cam 128 rotates so that the front columnar portions 137a and 138a protrude forward and the rear columnar portions 137b and 138b protrude upward, in other words, from the rear side toward the front side. Rotate vertically. That is, it rotates counterclockwise when viewed from the right side (front side in FIG. 29).

  As the solid cam 128 rotates, as shown in FIG. 29B, the left small piece portion 137 and the front columnar portions 137a and 138a (see FIG. 22) of the right small piece portion 138 of the solid cam 128 become the core body. It contacts the upper part of the rear end surface of the pressed piece 142 of the moving member 129 and presses the pressed piece 142 as it is.

  Then, when the operating projection 127 moves further forward as the operating portion 127 moves forward as it is, the three-dimensional cam 128 pressed by the operating projections 134 and 134 further rotates. Then, as shown in FIG. 29C, the solid cam 128 rotates approximately 90 degrees from the posture in the state where the pen tip 5 is retracted into the shaft tube 102 (state shown in FIG. 29A). Posture change is completed (shift from the retracted posture to the protruding posture).

When the posture change of the three-dimensional cam 128 is completed, the contact position between the three-dimensional cam 128 and the pressed piece 142 is moved forward. More specifically, the front columnar portions 137a and 138a (see FIG. 22) that protrude upward in the retracted posture are in a state of protruding forward in the protruding posture. Then, the rear end surface of the pressed piece 142 comes into contact with the front end portions of the front columnar portions 137a and 138a protruding forward. For this reason, the contact position with the pressed piece portion 142 in the posture when the three-dimensional cam 128 protrudes is in a state positioned ahead of the contact position with the pressed piece portion 142 in the posture when the three-dimensional cam 128 is retracted. As a result, the pressed piece portion 142 and the core body moving member 129 integrated with the pressed piece portion 142 are in a state of being positioned further forward.
That is, since the core body moving member 129 (the pressed piece 142) is pressed from the rear side in accordance with the posture change of the three-dimensional cam 128 and is pressed forward, the posture change of the three-dimensional cam 128 is completed. The moving member 129 is in a state of being positioned further forward.

  As a result, when the core body moving member 129 moves forward against the biasing force of the biasing member 147, the core member 103 integrally attached to the core body moving member 129 also moves forward together with the core body moving member 129. Move to. Then, when the core member 103 pressed by the core body moving member 129 moves forward, the pen tip 5 protrudes from the shaft tube 102 to the outside.

  Here, in a state where the pen tip 5 protrudes from the shaft tube 102 to the outside, the pen tip 5 moves rearward even if a force toward the rear side acts on the pen tip 5 due to writing pressure during use or the like. It does not move. More specifically, when the nib 5 and the core member 3 formed integrally with the nib 5 try to move backward, the rear end disk portion 144 of the core body moving member 129 moves backward. Be blocked. When the core moving member 129 tries to move backward due to the backward pressing force from the core member 3, the pressed piece 142 comes into contact with the three-dimensional cam 128 and is prevented from moving. Thus, the ballpoint pen 101 of the present embodiment is in a state where the pen tip 5 does not move backward unless the operation unit 127 is operated.

  Next, an operation for retracting the pen tip 5 into the shaft cylinder 102 will be described.

  In a state where the pen tip 5 of the ballpoint pen 101 protrudes from the shaft tube 102 (pen tip forming portion 107) to the outside (the state shown in FIG. 29C), the operation protrusion 133 of the operation portion 127 is moved backward. Then, the operation protrusion 133 slides rearward along the second groove 114b in the operation portion sliding groove 114 of the shaft cylinder 102. At this time, as the operation protrusion 133 moves, the main body 132 of the operation section 127 and the two operation protrusions 134 and 134 (see FIG. 27, one operation protrusion 134 is not shown in FIGS. 29 and 30). ) Also slides backwards.

  When the two operating protrusions 134 and 134 move rearward, as shown in FIG. 30A, the two operating protrusions 134 and 134 come into contact with the three-dimensional cam 128 from the front. At this time, the two operating projections 134 and 134 are in contact with the left small piece 137 and the right small piece 138 of the three-dimensional cam 128 (see FIG. 22, the left small piece 137 is not shown in FIG. 30). Specifically, at this time, the three-dimensional cam 128 is in the protruding position, and the left small piece portion 137 and the right small piece portion 138 have the front columnar portions 137a and 138a protruding forward, and the rear columnar portions 137b and 138b. Projects upward. The two operating projections 134 and 134 of the operation unit 127 abut against the rear columnar portions 137b and 138b from the front side. More specifically, the rear end surfaces of the two operating projections 134 and 134 are in contact with the front end surfaces (the top surface in the retracted posture) of the rear columnar portions 137b and 138b of the three-dimensional cam 128.

  When the operating protrusions 134 and 134 move rearward as they are, the operating protrusions 134 and 134 press the left small piece portion 137 and the right small piece portion 138, respectively. More specifically, the operating protrusions 134 and 134 press the front end surfaces of the rear columnar portions 137b and 138b in a state of protruding upward, respectively. As described above, the two operating protrusions 134 and 134 respectively press the left and right end portions of the three-dimensional cam 128 from the front, whereby the three-dimensional cam 128 starts to rotate with the rotation shaft portion 140 as the rotation axis. More specifically, the three-dimensional cam 128 rotates so that the front columnar portions 137a and 138a protrude upward and the rear columnar portions 137b and 138b protrude rearward, in other words, from the rear side toward the front side. Rotate vertically. That is, it rotates clockwise as viewed from the right side (front side in FIG. 30).

  As the three-dimensional cam 128 rotates, as shown in FIG. 30B, the contact position between the three-dimensional cam 128 and the pressed piece 142 moves upward. That is, the left small piece portion 137 and the right small piece portion are changed by changing the posture so that the left small piece portion 137 of the three-dimensional cam 128 and the front columnar portions 137a and 138a of the right small piece portion 138 protrude obliquely toward the front upper side. A portion in contact with the pressed piece 142 located in the vicinity of the front end of 138 shifts to the rear upper side.

  At this time, the three-dimensional cam 128 is pressed backward by the pressed piece 142 that is always urged backward by the urging member 147. For this reason, in addition to the two operating projections 134 and 134 of the operation unit 127, the three-dimensional cam 128 is also pressed backward by the pressed piece 142.

  When the three-dimensional cam 128 is further rotated by being pressed by the two operating projections 134 and 134 and the pressed piece portion 142, as shown in FIG. The posture is changed by approximately 90 degrees from the posture in the state protruding from the shaft cylinder 102 (the state shown in FIG. 30A), and the posture change is completed (the posture is changed from the posture at the time of protrusion to the posture at the time of withdrawal).

  When the posture change of the three-dimensional cam 128 is completed, the contact position between the three-dimensional cam 128 and the pressed piece 142 is moved rearward. . More specifically, the front columnar portions 137a and 138a that protrude to the front side in the protruding position are in a state of protruding upward in the retracted position. The front columnar portions 137a and 138a have the lower end surface in the protruding posture as the front end surface in the retracted posture. At this time, the front end surfaces of the front columnar portions 137a and 138a and the rear end surface of the pressed piece portion 142 are in contact with each other. The contact position of the pressing piece 142 moves backward. Therefore, the contact position with the pressed piece portion 142 in the posture when the three-dimensional cam 128 is retracted is located behind the contact position with the pressed piece portion 142 in the posture when the three-dimensional cam 128 is projected. Thus, the pressed piece portion 142 and the core body moving member 129 integrated with the pressed piece portion 142 are positioned more rearward.

  That is, the core body moving member 129 is always urged rearward by the urging member 147, and is prevented from moving rearward by contacting the solid cam 128. Therefore, when the contact position of the core body moving member 129 and the three-dimensional cam 128 moves further to the rear side, the core body moving member 129 moves further to the rear side by the biasing force of the biasing member 147.

  As a result, the core member 103 integrally attached to the core body moving member 129 also moves rearward together with the core body moving member 129. Then, the pen member 5 is retracted into the shaft tube 102 by moving the core member 103 pressed by the core moving member 129 backward.

In each of the above-described embodiments, the urging members 47 and 147 are incorporated, and an example in which the urging force of the urging members 47 and 147 is used when the pen tip 5 is retracted into the shaft cylinder 2 and 102 has been described. The retractable applicator of the present invention is not limited to this. The retractable applicator of the present invention is not necessarily configured to employ a biasing member. That is, the retraction operation of the pen tip 5 may be performed only by the force transmitted to the core member via the operation means without using the urging force of the urging member.
Further, the urging members 47 and 147 are not limited to springs, and other members (for example, rubber) may be used. Any device that can assist the retraction of the pen tip 5 by an urging force (or a pulling force) may be used.

  As described above, the retractable applicator of the present invention includes an operation unit, and the operation unit directly or indirectly connects the main body unit, the operation protrusion partly exposed to the outside from the shaft tube, and the core member. The operation protrusion is located on the rear side of the operation protrusion.

  Moreover, the retractable applicator of the present invention changes the posture of the cam portion when the operating projection comes into contact with the cam portion.

  In the retractable applicator according to the present invention, the operation protrusion and the operation protrusion are formed in the vicinity of both ends in the longitudinal direction of the main body, and are directed in directions including components in opposite directions in the vertical direction. Projecting from the main body.

  As described above, the retractable applicator of the present invention has a slide member attached to a core member, the slide member includes a pressed piece portion and a core member pressing portion, and the pressed piece portion moves. Thus, when the core member pressing portion presses the core member from the rear side, and the core member pressing portion is pressed by the core member, the pressed piece portion comes into contact with another member, so that the slide member and Movement of the core member in the axial direction of the shaft tube is prevented.

  In the retractable applicator of the present invention, the operation protrusion and the operation protrusion are formed in the vicinity of both ends in the longitudinal direction of the slide member.

  In the retractable applicator of the present invention, the pressed piece portion is located on the side of the core member, and the core member pressing portion is located behind the core member.

1,101 Ballpoint pen (Intrusion applicator)
2,102 Shaft tube 3,103 Core member 4,104 Operating means 5 Pen tip (applying body)
27, 127 Operation section 28 Plate cam (cam section)
29,129 Core body moving member (sliding member)
34,134 Actuation protrusion (projection piece)
40 pressing piece parts 42, 142 pressed piece parts 43b rear end disk part (core member pressing part)
128 solid cam (cam part)
137 Left small piece (pressing piece)
138 Right small piece (pressing piece)
144 Rear end disk part (core member pressing part)

Claims (7)

A shaft cylinder having a hollow portion formed therein and having an open end;
A core member disposed within the shaft cylinder and having an application body at the tip;
In the retractable applicator having an operating means for moving the core member in the axial direction and retracting the application body from the opening of the shaft tube,
The operating means includes a cam portion,
The cam portion presses the core member directly or indirectly to the opening side by changing the posture, and directly or indirectly blocks the movement of the core member to the retracted side. Have
The intrusion applicator characterized in that the pressing piece is a small piece located on a side of the core member.   The pressing piece portion is rotated relative to the shaft tube to change its posture, and the rotating shaft of the pressing piece portion intersects substantially perpendicularly to the axial direction of the shaft tube. The retractable applicator according to claim 1.   The retractable applicator according to claim 1, wherein the pressing piece is substantially “L” -shaped.   The operation means has an operation portion that is partially exposed to the outside from the shaft tube, and the posture of the pressing piece portion is changed by moving the operation portion along the axial direction of the shaft tube. The retractable applicator according to any one of claims 1 to 3.   The operation unit has two projecting pieces that project in a direction substantially perpendicular to the moving direction of the operation unit main body, and in a state where the coated body of the core member projects to the outside of the shaft member, In a state where a part of the pressing piece part is located between the two protruding piece parts and the coated body of the core member is retracted into the shaft member, the pressing piece part is the two protruding pieces. The retractable applicator according to claim 4, wherein the applicator is at a position deviated from between the parts. The operating means has a slide member attached integrally to the core member,
The slide member includes a pressed piece portion and a core member pressing portion,
When the pressed piece portion is pressed against the pressing piece portion, the core member pressing portion presses the core member from the rear, and the core member moves in the axial direction of the shaft tube together with the slide member. And
When the core member pressing portion is pressed by the core member, the pressed piece portion is in contact with the pressing piece portion, thereby preventing the axial movement of the core member and the slide member. The retractable applicator according to any one of claims 1 to 5, characterized in that   The retractable applicator according to claim 6, wherein the pressed piece is located on a side of the core member.

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