JP5896723B2 - Multifunction pen - Google Patents

Description

  The present invention relates to a multifunction pen that houses a plurality of refills including a mechanical pencil refill in a shaft cylinder.

  Conventionally, a plurality of ballpoint pen refills are housed in a shaft cylinder, and a knock operation mechanism attached to the rear end of each ballpoint pen refill is slidably attached to the shaft cylinder, and either of the knock operation mechanisms is selectively selected. Various so-called multicolor ballpoint pens configured to project a selected ballpoint pen refill from the tip of the shaft tube by being pushed in have been provided. In recent years, in addition to the ball-pen refill, there is also provided a mechanical pencil refill that functions as a mechanical pencil. Such a product is called a multi-function pen. An example of such a multifunction pen is disclosed in Patent Document 1 below.

As shown in Patent Document 1, refill guide members having holes corresponding to each of these refills are inserted into the shaft cylinder of such a multi-function pen. Each refill moves in the front-rear direction.
On the other hand, each refill is usually inserted into the internal space of the coil spring. The coil spring is often interposed between the knock operation mechanism and the guide member. The pushing operation of the knock operation mechanism is performed against the urging force of the coil spring, and the tip of the refill protrudes from the tip of the shaft tube when the knock operation mechanism engages with the inside of the shaft tube, for example. The state is to be maintained. When this engagement is released, the knock operation mechanism is pushed back by the biasing force of the coil spring, and the tip of the refill is immersed in the shaft tube.

JP-A-11-139080 JP 2009-107135 A

In the conventional multi-functional pen, a coil spring is set on the outer periphery of the core case of the mechanical pencil refill in the same manner as described above. In this case, when the coil spring is compressed during writing with the mechanical pencil refill, the inner surface of the coil spring buckled by the compression may protrude inward and interfere with the outer periphery of the core case. This interference sometimes hinders the lead-out operation by the knock.
In particular, as shown in Patent Document 2, a mechanical pencil refill having a structure in which a force applied from a writing surface to a core at the time of writing is transmitted to a core rotation mechanism that forms a part of the core feeding mechanism along an axis. If the coil spring is set on the outer periphery of the refill as described above, it is assumed that the interference interferes with the core rotation mechanism.

  In view of the above problems, the present invention is a multifunctional pen, in which buckling due to compression of a coil spring that urges a knock operation mechanism of a mechanical pencil refill backward is a function as a mechanical pencil such as a core feeding operation by a knock. It is an object to prevent obstruction.

In view of the above problems, the present invention is a multi-functional pen P in which a mechanical pencil refill 30 that functions as a mechanical pencil and a plurality of ball pen refills 50 that function as a ballpoint pen are housed in a shaft tube 10,
Inside the shaft cylinder 10 is provided a guide spacer 20 provided with a corresponding guide hole 21 for guiding the mechanical pencil refill 30 and the plurality of ball pen refills 50 in the front-rear direction,
The rear end of the mechanical pencil refill 30 is connected to a mechanical pencil knock mechanism 40 provided in the rear of the shaft cylinder 10, and the writing tip of the mechanical pencil refill 30 is moved by moving the mechanical pencil knock mechanism 40 in the front-rear direction. 31 appears and disappears from the opening 11 at the tip of the shaft tube 10,
The rear end of each ball-point pen refill 50 is connected to a ball-point pen knock bar 60 provided in the rear of the shaft cylinder 10, and the writing tip 51 of the ball-point pen refill 50 is moved in the front-rear direction by the movement of the ball-point pen refill 50. Formed so as to appear and disappear from the opening 11,
Inside the shaft cylinder 10, a shaft cylinder side locking portion for locking the mechanical pencil knock mechanism 40 in order to maintain a state where the writing tip 31 of the mechanical pencil refill 30 protrudes from the opening portion 11. 15 is provided,
The mechanical pencil knock mechanism 40 is provided with a knock mechanism side locking portion 45 for engaging with the shaft tube side locking portion 15.
Between each ball-point pen knock bar 60 and the guide spacer 20, springs 61 for biasing the ball-point pen refill 50 are interposed, respectively.
The planar position of the mechanical pencil refill 30 and the mechanical pencil knock mechanism 40 in the shaft cylinder 10 is closer to the axial center than the planar positions of the plurality of ball pen refills 50 and the ball pen knock bars 60 in the axial cylinder 10. ,
The rear end of the mechanical pencil knock mechanism 40 protrudes from the opening 12 at the rear end of the shaft tube 10 as a knock part 42, and
The mechanical pencil knock mechanism 40 is provided with a spring 41 for urging it backward, and the spring 41 is provided at a place other than the periphery of the outer peripheral surface of the mechanical pencil refill 30 .
The guide spacer 20 is a mechanical pencil spring receiver that receives a mechanical pencil insertion hole 24 through which the mechanical pencil refill 30 is inserted, and a spring 41 of the mechanical pencil knock mechanism 40 that is positioned closer to the periphery than the mechanical pencil insertion hole 24. And 25, and
A spring push rod 47 that protrudes from the tip of the mechanical pencil knock mechanism 40 and is located on the peripheral side from the mechanical pencil refill 30 is provided,
The spring 41 of the mechanical pencil knock mechanism 40 is characterized by Rukoto interposed between the pencil spring receiving 25 and the spring push rod 47.

The “multifunctional pen P” in the present invention includes a “mechanical pencil refill 30” and a plurality of “ball pen refills 50”. The mechanical pencil refill 30 is provided with a lead feeding mechanism and a lead storage portion for functioning as a mechanical pencil, and a sharp pencil writing tip 31 protruding from the tip of the shaft tube 10 at the time of writing. On the other hand, the ballpoint pen refill 50 is provided with an ink containing tube for containing ink and a ballpoint pen tip as the writing tip 51.
`` Guide spacer 20 '' is a substantially cylindrical member that is fitted and inserted into the substantially central portion inside the shaft tube 10, and includes the `` guide hole 21 '' corresponding to the mechanical pencil refill 30 and the plurality of ball pen refills 50, respectively. There are as many as these refills.

  The “mechanical pencil knock mechanism 40” refers to a mechanism provided behind the shaft cylinder 10 for moving the mechanical pencil refill 30 in the front-rear direction so that the writing tip 31 protrudes and retracts from the shaft cylinder 10. Further, the mechanical pencil knock mechanism 40 also serves as a knock mechanism for feeding the lead when the writing tip 31 protrudes from the shaft tube 10. The mechanical pencil knock mechanism 40 is always urged backward by a spring 41. The rear end of the mechanical pencil knock mechanism 40 protrudes from the opening 12 at the rear end of the shaft cylinder 10 as a knock portion 42, and the tip of the mechanical pencil refill 30 protrudes from the front end of the shaft cylinder 10. By pushing this, a knocking operation for feeding the lead is performed.

“Ball pen knock bar 60” refers to a mechanism provided behind the shaft cylinder 10 for moving the ballpoint pen refill 50 in the front-rear direction so that the writing tip 51 protrudes and retracts from the shaft cylinder 10. A spring 61 is interposed between the ball-point pen knock bar 60 and the guide spacer 20, whereby the ball-point pen knock bar 60 is always urged backward.
The `` shaft cylinder side locking portion 15 '' and the `` knock mechanism side locking portion 45 '' are the structure on the shaft tube 10 side and the structure provided in the mechanical pencil knock mechanism 40, respectively, and have shapes that can be engaged with each other. By having it, it is for maintaining the writing state of a mechanical pencil. The shaft cylinder side locking portion 15 is, for example, a step provided along the circumferential direction at a predetermined position of a step-like rail-like structure provided along the longitudinal direction by varying the thickness inside the shaft cylinder 10. It can be formed as a part, a concave part or a convex part. Further, the knock mechanism side locking portion 45 can be formed, for example, as a step portion, a convex portion or a concave portion that can be engaged with the shaft tube side locking portion 15 provided as the step portion, the concave portion or the convex portion. .

  The planar position of the mechanical pencil refill 30 and the mechanical pencil knock mechanism 40 in the shaft cylinder 10 (that is, the position viewed from the rear of the shaft cylinder 10) is the plurality of ball pen refills 50 in the shaft cylinder 10. And, it is closer to the axial center than the planar position of the ball-point pen knock bar 60. Based on this positional relationship, when the knock mechanism side locking portion 45 engages with the shaft tube side locking portion 15, it moves so as to sink in the direction in which the ballpoint pen refill 50 is positioned and engages. To do. The moving distance is desirably set so as to substantially correspond to the distance between the axis of the mechanical pencil refill 30 in the non-writing state and the axis of the multifunction pen P itself. By setting as such, the mechanical pencil refill 30 can be positioned at the axis of the multifunction pen P itself in the writing state.

In the present invention, the spring 41 belonging to the mechanical pencil knock mechanism 40 is not set around the outer peripheral surface of the mechanical pencil refill 30. That is, the spring 41 is provided at a location other than the periphery of the outer periphery of the mechanical pencil refill 30, for example, around the rear end of the mechanical pencil knock mechanism 40 located behind the mechanical pencil refill 30. The mechanical pencil refill 30 can be urged rearward between a spring receiver provided inside. In addition, it is more desirable that the spring 41 is mounted as follows.
Here, the guide hole 21 provided in the guide spacer 20 includes a mechanical pencil insertion hole 24 through which the mechanical pencil refill 30 is inserted, and a ball pen insertion hole 28 through which the ball pen refill 50 is inserted. Further, a mechanical pencil spring receiver 25 for receiving the spring 41 of the mechanical pencil knock mechanism 40 is provided at a position closer to the periphery of the guide spacer 20 than the mechanical pencil insertion hole 24.

At the tip of the mechanical pencil knock mechanism 40, a bar-like structure protrudes from a position on the peripheral side of the mechanical pencil refill 30. This structure is called a “spring push bar 47”. The spring 41 of the mechanical pencil knock mechanism 40 is interposed between the mechanical pencil spring receiver 25 and the spring push rod 47.
That is, the spring 41 belonging to the mechanical pencil knock mechanism 40 is not set on the outer periphery of the mechanical pencil refill 30 itself. Nevertheless, the spring 41 urges the mechanical pushbutton 47 of the mechanical pencil knock mechanism 40 rearward, thereby urging the mechanical pencil knock mechanism 40 rearward, and thereby indirectly urging the mechanical pencil refill 30 backward. It is supposed to be. As a result, even if the spring 41 is compressed and its inner surface protrudes inwardly, there is no mechanical pencil refill 30 at the protruding end. Therefore, the buckling due to the compression of the spring 41 does not interfere with the mechanical pencil refill 30 itself, and thereby does not hinder the function of the mechanical pencil knock mechanism 40 such as the lead-out operation by the knock.

  Since the present invention is configured as described above, in a multi-function pen, buckling due to compression of a coil spring that urges a mechanical pencil refill knock operation backward is used as a mechanical pencil such as a lead-out operation by a knock. It is possible not to disturb the function of.

It is the front view (A), side view (B), back view (C), bottom view (D), and top view (E) at the time of non-writing of the multifunction pen concerning an embodiment of the invention. It is IIa-IIa sectional drawing (A) and IIb-IIb sectional drawing (B) of FIG. 1 (D), and IIc-IIc sectional drawing (C) and IId-IId sectional drawing (D) of FIG. 2 (A). It is a perspective view of the guide spacer used with the multifunctional pen concerning an embodiment of the invention. It is IV-IV sectional drawing of FIG.1 (B), Comprising: The positional relationship of the cam in the non-writing state of the multifunctional pen which concerns on embodiment of this invention is shown. In the multi-function pen according to the embodiment of the present invention, states of the mechanical pencil refill 30 before feeding (A), during feeding (B), and after feeding (C) are respectively shown in partial side sectional views. VIe-VIe of a front view (A), a side view (B), a bottom view (C), a plan view (D), and FIG. 6 (C) in a mechanical pencil writing state of the multifunction pen according to the embodiment of the present invention. It is sectional drawing (E). It is VII-VII sectional drawing of FIG.6 (B), Comprising: The positional relationship of the cam in the mechanical pencil writing state of the multifunctional pen which concerns on embodiment of this invention is shown. Side view (A), rear view (B), bottom view (C), plan view (D), and VIIIe-VIIIe cross section of FIG. 8 (C) in the ballpoint pen writing state of the multifunction pen according to the embodiment of the present invention It is a figure (E). It is IX-IX sectional drawing of FIG. 8 (A), Comprising: The positional relationship of the cam in the ball-point pen writing state of the multifunctional pen which concerns on embodiment of this invention is shown.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, “front” means the side where the writing tips 31 and 51 are located in the multifunction pen P, and “rear” means the opposite side, that is, the side where the knock part 42 is located. To do. Further, the “front side” refers to the side shown in FIG. 1A in the multifunction pen P, for example, and the “rear side” refers to the side shown in FIG. 1C.
(1) Appearance The multifunction pen P according to the embodiment of the present invention has an appearance as shown in FIG. That is, the shaft tube 10 is formed by screwing together a front shaft 16 positioned in the front and a rear shaft 17 positioned in the rear (FIGS. 1A to 1C). As will be described later, one mechanical pencil refill 30 and two ball pen refills 50 and 50 are built in the shaft tube 10. And the opening parts 11 and 12 are provided in the front-end | tip and the rear end of the axial cylinder 10, respectively. The opening 11 (FIGS. 1 (A) to 1 (D)) at the tip of the shaft cylinder 10 is written by either the writing tip 31 of the mechanical pencil refill 30 or the writing tips 51, 51 of the ballpoint pen refill 50, 50. For projecting and immersing. On the other hand, from the opening 12 at the rear end of the barrel 10, a knock 42 portion used for the feeding operation of the mechanical pencil refill 30 and the knocking operation for feeding the core projects (FIGS. 1A to 1C). (E)). In the non-writing state, as shown in FIG. 1 (E), the knock portion 42 is slightly eccentric to the front side in the opening 12 at the rear end of the shaft tube 10.

A slit is provided in the front-rear direction near the rear end of the front surface of the shaft tube 10. This is referred to as a guide slit 18 (FIG. 1A). In this guide slit 18, a guide projection 48, which is a part of a mechanical pencil knock mechanism 40 described later, is positioned so as to be movable back and forth (FIG. 1A).
A pair of slits in the front-rear direction is provided in the vicinity of the rear end of the rear surface of the shaft tube 10. These are called slide slits 13 and 13 (FIGS. 1A and 1B). The front end portions of the slide slits 13 and 13 are notched toward each other, and these portions are referred to as engagement notches 13a and 13a (FIGS. 1A and 1B). In these slide slits 13a, 13a, slide projections 62, 62, which are part of ballpoint pen knock bars 60, 60 described later, are positioned so as to be movable back and forth (FIGS. 1B and 1C). ).

(2) Internal structure FIG. 2 shows the multifunction pen P of FIG. 1 in cross-sectional views.
One mechanical pencil refill 30 and two ballpoint pen refills 50, 50 are built in the shaft cylinder 10 (FIGS. 2A to 2C). In addition, a guide spacer 20 is fitted and inserted almost in the middle (a little closer to the rear end) in the shaft cylinder 10 (FIGS. 2A and 2B). As shown in FIG. 2C, the guide spacer 20 has three guide holes for guiding the movement of the one mechanical pencil refill 30 and the two ball pen refills 50, 50 in the front-rear direction. 21,21,21 are provided. Specifically, one of the guide holes 21, 21, 21 located substantially on the axial center side is a mechanical pencil insertion hole 24 for inserting and guiding the mechanical pencil refill 30. Also, two of them located on the back side are ball-point pen insertion holes 28 and 28 for inserting and guiding the ball-point refills 50 and 50. Further, a small protrusion protruding rearward is formed on the front side of the mechanical pencil insertion hole 24 (upward in FIG. 2A, hereinafter the same), and this is called a mechanical pencil spring receiver 25 (FIG. 2). (A), (C)). Details of the structure of the guide spacer 20 will be described later.

The rear end of the mechanical pencil refill 30 is connected to the mechanical pencil knock mechanism 40 located behind the shaft cylinder 10 so as to penetrate the mechanical pencil refill 30. The rear end of the mechanical pencil knock mechanism 40 is connected to the knock portion 42 (FIG. 2A). When the knock cap 42a that constitutes the outermost layer of the knock portion 42 is removed, a core replenishing hole 44 is located in the shaft center (FIGS. 2A and 2B), from which the core can be replenished. It has become.
From the front side of the rear end of the mechanical pencil knock mechanism 40, the guide protrusion 48 protrudes and is located in the guide slit 18 near the rear end of the shaft cylinder 10 (FIGS. 2A and 2D).
A spring push rod 47 protrudes from the front end side of the mechanical pencil knock mechanism 40 and closer to the front side than the mechanical pencil refill 30 (FIG. 2A). A spring 41 is interposed between the spring push rod 47 and the mechanical pencil spring receiver 25 of the guide spacer 20 described above, whereby the mechanical pencil knock mechanism 40 is always urged rearward (FIG. 2). (A)). That is, the mechanical pencil refill 30 itself is not inserted into the spring 41 that biases the mechanical pencil knock mechanism 40 backward. This prevents the compressed spring 41 from interfering with the mechanical pencil refill 30.

Further, a mechanical pencil release cam 43 is provided on the back side of the mechanical pencil knock mechanism 40 (downward in FIG. 2A, hereinafter the same), and protrudes to the back side. The mechanical pencil release cam 43 is formed as a ridge extending in the front-rear direction, and as shown in FIG. 6E described later, the tip and the rear end thereof are cut off obliquely, respectively. A release slope 43a and a rear end release slope 43b are formed, and a straight ridge line 43c is formed between them. The function of the mechanical pencil release cam 43 will be described later.
The rear ends of the ballpoint pen refills 50 and 50 are respectively connected to ballpoint pen knock bars 60 and 60 located in the rear of the shaft cylinder 10 (FIG. 2B). Between the front end of each ball-point pen knock bar 60, 60 and the rear end surface of the guide spacer 20, springs 61, 61 into which ball-point refills 50, 50 are inserted are interposed (FIG. 2 (B)). . The ballpoint pen knock bars 60, 60 are always urged rearward by the springs 61, 61.

  Further, the above-described slide protrusions 62 and 62 protrude from the rear ends of the respective ball-point pen knock bars 60 and 60 (FIG. 2D). Further, as shown in FIG. 2A, ball-point pen release cams 63, 63 are provided on the opposite edges of each ball-point pen knock bar 60, 60 (note that only one of them is visible in the figure). .) The ball-point pen release cams 63, 63 are formed as ridges extending in the front-rear direction, and as shown in FIG. They are formed as front end release slopes 63a and 63a and rear end release slopes 63b and 63b, and are formed as straight ridge lines 63c and 63c (only one of them is visible in the figure). ). The function of the ballpoint pen release cams 63, 63 will be described later.

Further, as shown in FIG. 2D, on the inner peripheral surface of the rear end of the shaft cylinder 10, two portions facing each other across the mechanical pencil knock mechanism are thick in the front-rear direction, and these portions are guide rails 14. , 14. This will be described later.
(3) Guide spacer 20
As shown in FIG. 3, the guide spacer 20 has a substantially cylindrical appearance. As the guide holes 21, 21, 21 described above, the mechanical pencil insertion hole 24 positioned substantially at the center and two ballpoint pen insertion holes are provided. 28, 28 (however, only one is visible in the figure).
Further, columnar refill guides 22 and 22 protrude rearward from both sides of the mechanical pencil insertion hole 24 to the rear end. The sides facing the ballpoint pen refills 50 and 50 (that is, the back side) at the rear ends of the refill guides 22 and 22 form an inclined surface that is cut off obliquely. This inclined surface is referred to as a fixed cam 23. The fixed cam 23 is configured to guide the movement of the mechanical pencil knock mechanism 40, which will be described later in detail.

  On the other hand, ball-point pen spring receivers 26 and 26 (however, only one of them is visible in the figure) are erected at positions close to the axial center of the respective ball-point pen insertion holes 28 and 28. This ball-point pen spring receiver 26 has a shape like the inner surface of a cylinder with the edge side scraped off. The front and rear portions of the ball-point pen spring receiver 26 have different radii of curvature through steps. That is, the curvature radius of the rear part is larger than the curvature radius of the front part. This front portion is called a front inner wall 26a, and is a portion that holds the end winding portion at the tip of the spring 61. On the other hand, this rear portion is referred to as a rear inner wall 26b, and the ballpoint pen refill 50 pressed by the ballpoint pendating stick 60 can escape to the axial center together with the spring 61 around it. The step between them is referred to as a spring receiving step 27. In other words, the ball-point pen spring receiver 26 is clearly divided by the spring receiving step 27 into a front inner wall 26a having a relatively small radius of curvature and a relatively large rear inner wall 26b.

(4) Release Cam State in Non-Writing State In the non-writing state shown in FIG. 2, the mechanical pencil release cam 43 and the ball-point pen release cams 63, 63 are both located at the rearmost inside the shaft cylinder 10. In this state, as shown in the cross-sectional view of FIG. 4, the ridgeline 43c of the mechanical pencil release cam 43 and the ridgelines 63c and 63c of the two ballpoint release cams 63 and 63 are held at positions close to each other. In this state, the mechanical pencil refill 30 is in a position slightly deviated from the axial center toward the front (upward in the figure).
(5) Delivery of mechanical pencil refill 30 Hereinafter, delivery of the mechanical pencil refill 30 in the multi-function pen P according to the present embodiment will be described with reference to a partial side sectional view of FIG. 5 and FIGS. 6 and 7 as appropriate. .

As shown in FIG. 5A, the moving cams 46 and 46 protrude from both side surfaces of the mechanical pencil knock mechanism 40 (however, only the front side is visible in the figure). The back sides of the distal ends of the moving cams 46 and 46 are inclined surfaces that are cut off obliquely. This inclined surface is inclined at an angle that matches the inclination angle of the fixed cam 23 at the tip of the refill guide 22. Further, on both sides of the rear end of the mechanical pencil knock mechanism 40, a knock mechanism side locking portion 45 is provided as a protrusion protruding rearward.
Further, as shown in FIG. 5 (A), a pair of guide rails 14 and 14 (see FIGS. 2 (D) and 4) provided on the inner side of the shaft tube 10 have a predetermined distance from the rear end edge of the shaft tube 10. It is shifted to the back side at a distance. The predetermined distance is a distance required for feeding the mechanical pencil refill 30. The steps formed by the shifted portions are the engagement steps 15 and 15 as the shaft tube side locking portions 15 and 15 (however, only the front side is shown in the drawing).

In the state before feeding shown in FIG. 5A, that is, in the non-writing state, the knock mechanism side locking portions 45, 45 are in contact with the guide rails 14, 14 at the rear end of the shaft cylinder 10. When the knock portion 42 is pressed with a finger from this state, the mechanical pencil knock mechanism 40 starts moving forward while compressing the spring 41 with the spring push rod 47. At this time, the knock mechanism side locking portions 45, 45 move forward along the guide rails 14, 14.
Then, when it has moved by the predetermined distance, as shown in FIG. 5B, the moving cam 46 and the fixed cam 23 come into contact with each other so as to contact each other's inclined surfaces. At the same time, the knock mechanism side locking portions 45, 45 are once detached from the guide rails 14, 14 at the engagement steps 15, 15. When the pressing is further continued from this state, the moving cam 46 slides to the back side along the inclined surface of the fixed cam 23, whereby the mechanical pencil knock mechanism 40 starts to move together with the mechanical pencil refill 30 to the axial center side.

  Then, when the knock mechanism side locking portions 45, 45 are again in contact with the guide rails 14, 14, no further pressing is possible. When the finger is removed from the knock part 42 in this state and the pressing is released, the mechanical pencil knock mechanism 40 is pushed back by the urging force of the compressed spring 41. At this time, as shown in FIG. 5C, the knock mechanism side locking portions 45, 45 are engaged with the engagement steps 15, 15. Further, the mechanical pencil knock mechanism 40 cannot move backward. The writing tip 31 of the mechanical pencil refill 30 protrudes from the opening 11 at the tip of the barrel 10 (FIGS. 6A to 6C), and the multifunction pen P can be written as a mechanical pencil. Become.

In this state, as shown in FIGS. 6D and 6E, the mechanical pencil refill 30 is in a position coincident with the axis of the multifunction pen P. By knocking the knock part 42 in this state, the lead is extended from the writing tip 31. As shown in FIG. 6E, the mechanical pencil release cam 43 of the mechanical pencil knock mechanism 40 is positioned in front of the ballpoint pen release cams 63, 63. That is, as shown in FIG. 7, the mechanical pencil release cam 43 has moved to the back side in front of the ballpoint pen release cams 63, 63 as compared with the state of FIG.
(6) Feeding out the ball-point pen refill 50 When one of the slide projections 62, 62 of the ball-point pen knock bar 60, 60 is operated from the writing state of the mechanical pencil refill 30 shown in FIG. The spring 61 is compressed along the line 13 while moving forward.

  During this time, the ballpoint pen releasing cam 63 of the ballpoint knock bar 60 also moves forward. Then, the tip release slope 63a at the tip approaches the rear end release slope 43b at the rear end of the mechanical pencil release cam 43 located in front of the tip release slope 43a, and eventually comes into contact (see FIG. 6E). ). Then, the mechanical pencil release cam 43 is repelled in the axial direction by the ballpoint pen release cam 63, so that the knock mechanism side locking portions 45, 45 and the engagement steps 15, 15 are engaged (see FIG. 5C). Will be released as shown in FIG. Then, the mechanical pencil knock mechanism 40 is pushed back to the position shown in FIG. 5A by the urging force of the spring 41, and the knock bar 42 also returns to the position eccentric to the front side (FIG. 8D). reference).

As shown in FIG. 8 (B), the slide protrusion 62 moves toward the other engagement notch 13a at the engagement notch 13a at the tip of the slide slit 13. As a result, the slide protrusion 62 is engaged with the engagement notch 13a. When this state is reached, the writing tip 51 of the ballpoint pen refill 50 protrudes from the opening 11 at the tip of the barrel 10 (FIGS. 8A to 8C), and the multi-function pen P is a mechanical pencil. It becomes possible to write.
In this state, as shown in FIG. 9, the extended ballpoint pen release cam 63 on the side of the ballpoint pen refill 50 is positioned in front of the other ballpoint pen release cam 63 and the mechanical pencil release cam 43.

When the above-described ball-point pen refill 50 is fed out from the non-writing state shown in FIG. 1, the engagement state between the knock mechanism side locking portions 45, 45 and the engagement steps 15, 15 (FIG. 5C The process proceeds almost in the same way, only without the cancellation of ()).
In this state, as shown in FIG. 8E, the ballpoint pen refill 30 is bent at the position of the guide spacer 20, and the writing tip 31 is positioned at the axial center. At this time, the rear inner wall 26b (see FIG. 3) of the ballpoint pen spring receiver 26 behind the guide spacer 20 is secured as a space for the spring 61 pressed in the axial direction by the bent ballpoint pen refill 30 to escape. In this state, damage to the spring 61 can be avoided.

  When the slide projection 62 of the ballpoint pen refill 50 of the other ballpoint pen refill 50 is operated from the writing state of the ballpoint refill 50 as shown in FIG. 9 is brought into contact with the rear end releasing slope 63b of the ballpoint pen releasing cam 63 in the writing state from the state shown in FIG. 9, so that the sliding protrusion 62 and the engaging notch 13a are engaged (see FIG. 8B). ) Is canceled. Then, the ball pen refill 50 in the writing state is pushed back by the biasing force of the compressed spring 61 (see FIG. 8E), and returns to the state shown in FIG. When the knock portion 42 is operated instead of the operation of the slide protrusion 62 of the other ballpoint pen knock bar 60, the tip releasing slope 43a of the mechanical pencil releasing cam 43 is in the writing state from the state shown in FIG. Except that the slide projection 62 and the engagement notch 13a are engaged with each other by releasing the rear end release slope 63b of the ballpoint pen release cam 63, the engagement state (see FIG. 8B) is released. Returning to the state shown in FIG.

  The present invention can be used as a multi-function pen that houses a plurality of refills including a mechanical pencil refill in a shaft cylinder.

P multifunction pen
10 Shaft cylinder 11 Opening at the front end 12 Opening at the rear end
13 Slide slit 13a Engagement notch 14 Guide rail
15 Shaft cylinder side locking part (engagement step) 16 Lead shaft
17 Rear shaft 18 Guide slit
20 Guide spacer 21 Guide hole 22 Refill guide
23 Fixed cam 24 Mechanical pencil insertion hole
25 Mechanical pencil spring holder 26 Ballpoint pen spring holder
26a Front inner wall 26b Rear inner wall 27 Spring receiving step
28 Ballpoint pen insertion hole
30 Mechanical pencil refill 31 Writing tip
40 Mechanical pencil knock mechanism 41 Spring
42 Knock part 42a Knock cap 43 Mechanical pencil release cam
43a Tip release slope 43b Trail release slope 43c Ridge line
44 Core refill hole 45 Locking mechanism side locking part 46 Moving cam
47 Spring push rod 48 Guide protrusion
50 Ballpoint pen refill 51 Writing tip
60 Ball-point pen knock 61 Spring 62 Slide protrusion
63 Ballpoint pen release cam 63a Tip release slope 63b Rear end release slope
63c Ridge line

Claims (1)

A multi-function pen in which a mechanical pencil refill that functions as a mechanical pencil and a plurality of ball pen refills that function as a ballpoint pen are housed in a shaft tube,
A guide spacer provided with a guide hole corresponding to each of the mechanical pencil refill and the plurality of ball pen refills for guiding the movement in the front-rear direction is provided in the shaft cylinder.
The rear end of the mechanical pencil refill is connected to a mechanical pencil knock mechanism provided at the rear of the shaft cylinder, and the writing tip of the mechanical pencil refill is moved forward and backward by the mechanical pencil knock mechanism. In and out of the opening of
The rear end of each ball-point pen refill is connected to a ball-point pen knock bar provided in the rear of the shaft cylinder so that the writing tip of the ball-point pen refill protrudes from the opening by moving the ball-point pen knock bar in the front-rear direction. Formed into
In the shaft cylinder, a shaft cylinder side locking portion for locking the mechanical pencil knock mechanism is provided to maintain the state where the writing tip of the mechanical pencil refill protrudes from the opening,
The mechanical pencil knock mechanism is provided with a knock mechanism side locking portion for engaging with the shaft tube side locking portion,
Between each of the ballpoint pen knock bars and the guide spacer, a spring for biasing the ballpoint pen refill is interposed,
The plane position in the shaft cylinder of the mechanical pencil refill and the mechanical pencil knock mechanism is closer to the axis than the plane position of the plurality of ball pen refills and ball pen knock bars in the shaft cylinder,
The rear end of the mechanical pencil knock mechanism protrudes from the opening at the rear end of the shaft cylinder as a knock portion,
The mechanical pencil knock mechanism is provided with a spring for urging it backward, and the spring is provided at a location other than the periphery of the outer periphery of the mechanical pencil refill ,
The guide spacer is provided with a mechanical pencil insertion hole through which the mechanical pencil refill is inserted, and a mechanical pencil spring receiver that receives a spring of the mechanical pencil knock mechanism located closer to the periphery than the mechanical pencil insertion hole. And
A spring push rod is provided that protrudes from the tip of the mechanical pencil knock mechanism and is positioned on the peripheral side of the mechanical pencil refill,
The spring of the mechanical pencil knock mechanism, multifunctional pen according to claim Rukoto interposed between the pencil spring receiver and the spring push rod.

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