JPH0568359B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is easy to use because it does not require attaching or detaching the cap, and has good sealing properties when not in use when the writing body is stored in the main body. The present invention relates to a capsule writing instrument having a drying prevention mechanism that has a small number of parts, a simple structure, and can be manufactured at low cost.

(Prior Art and Problems) Conventionally, there are two types of cat press writing instruments aimed at preventing dryness: those in which the writing itself is difficult to dry, and those in which a drying prevention mechanism is provided within the main body. The former uses ink that is difficult to dry and moves the air holes to the rear to make them smaller, but since there is no mechanical seal, the purpose of preventing drying cannot be fully achieved.
For this reason, the cursive font was sold separately from the main body and wrapped in aluminum wheels, etc., which caused the problem that consumers could not try writing before purchasing. In addition, the latter uses various types of drying prevention mechanisms, but all of them have insufficient sealing properties, the cursive writing is sold separately, and there are many parts that make assembly difficult. It had the disadvantage of being extremely expensive.

The applicant has previously demonstrated good sealing performance,
In addition, we have developed a variety of cat press writing instruments with drying prevention mechanisms that can be manufactured at low cost. The first type has good sealing properties, has a small number of parts, and can be manufactured at low cost.
After use, the tip of the main body must be turned downward and the so-called "directionality" has been a problem (see Japanese Patent Laid-Open No. 142197/1983). Therefore, we developed a second type that has no directionality, but like the first one, it has a sliding tube and is also equipped with a mechanism to move the seal tube, seal lid, and writing body forward and backward, so it is costly. There were problems in that the height was a little high, and the presence of a sliding tube spoiled the appearance (see Japanese Patent Application Laid-Open No. 105599/1983).
In addition, we developed a third type that has no directionality and does not have a sliding tube, but this requires a considerable amount of cost for the mechanism that brings the seal lid into close contact with the seal tube and the creation of the groove on the back of the seal lid. It had the disadvantage that the shape could not be sharpened (Japanese Patent Application Laid-Open No. 1989-1999).
-Refer to Publication No. 58896).

The technical object of the present invention is to solve the problems of the above-mentioned conventional techniques, to be easy to use, to have good sealing properties, to be manufactured at low cost with a small number of parts, and to be suitable for disposable products.

(Means for Solving the Problems) In order to solve the above-mentioned technical problems, the present invention provides a seal cylinder having a transparent hole in which the front part of the writing body appears and retracts in the main body, and is provided with a seal cylinder that is substantially fixed. A means such as a groove or a permeable hole is provided in either the seal cylinder or the main body to allow the thread-like member (including the stopper and the frictional resistance part) to pass through, and the frictional resistance part of the thread-like member is allowed to pass near the tip hole of the sealing cylinder. A seal lid with a small hole or recess that prevents the stopper from passing through is attached so that it can be opened and closed, and the tip of the writing part is stored inside the seal cylinder, inside the seal cylinder or the body behind the air hole of the writing body. A seal body made of an elastic member is provided inside, a writing body having a tip writing part and an air hole is accommodated in the main body, and the writing body is advanced to a writing state with the tip writing part sticking out from the tip of the main body, A forward/backward mechanism (knock type or rotary type may be used) is provided for retracting the tip writing part into a stored state in which it is retracted into the seal cylinder, and a thread-like member (a stopper and a friction resistance part) is provided near the seal lid. ), and install a front guide body that guides the thread-like member in the direction of opening the seal lid.
On the other hand, the rear part of the cursive writing body has a central hole passing through the rear part, a small hole or recess for guiding the thread-like member in the folding direction, and a rear guide body provided with protrusions as necessary, which is almost fixed inside the main body. Attachment, fixing one end of a thread-like member that has a stopper in a part and a part that has frictional resistance against the small hole or recess of the seal lid near or in the entire stopper to a member that interlocks with the writing body; The other end of the thread-like member is connected to a seal cylinder, a seal lid, a front guide body,
On the opposite side of the seal cylinder, after going around the rear guide body and fixing it to a member that interlocks with the writing body, the stopper is arranged at the place where it passes through the seal cylinder and passes through a small hole or recess in the seal lid, When the writing body is stored, the seal lid is brought into close contact with the tip of the seal cylinder via the thread-like member by the stopper of the thread-like member and the retreating force of the member that interlocks with the writing body, and when the writing body moves forward, friction between the seal lid and the thread-like member is generated. It is characterized by the fact that the seal lid is opened by frictional resistance with the resistance part.

(Function) The present invention is configured as described above, and thus,
When the writing body is stored in the main body and is not in use, the seal lid is pulled at the tip of the seal cylinder by the stopper provided on a part of the thread-like member and the retraction force of the member that moves with the writing body that pulls one end of the thread-like member backward. On the other hand, since the air holes of the writing body are sealed by a sealing body provided behind the writing body, drying of the writing body is prevented. From this state, when the forward/backward mechanism is operated by knocking or rotating to move the member interlocking with the writing body forward, the force of the thread-like member passes through the rear guide body, the front guide body, and opens the seal lid. However, at the same time, the force of the thread-like member pulling the stopper loosens, and the seal lid begins to open from the seal cylinder tip hole due to frictional resistance with the friction-resisting portion of the thread-like member.
After the opening is completed, only the thread-like member moves in a hanging manner as the member interlocking with the writing body moves forward. That is, as the member interlocking with the writing body advances and retreats, the thread-like member also circulates in the forward and reverse directions. At this time,
The small hole or recess provided in the seal lid passes through the frictional resistance part of the thread-like member (the thread-like member as a whole may have frictional resistance against the small hole or recess, etc.), and the front guide body or seal cylinder. Since the thread-like member passes through the stopper as well as the frictional resistance part, the thread-like member reciprocates smoothly.

Note that the distance between one end of the thread-like member and the stopper is set so that the seal lid is in close contact with the tip of the seal cylinder, that is, so that it is taut. The sealing condition will be better if the distance to the stopper is a little longer. In other words, this is to prevent the seal lid from being pulled from both the top and bottom. In this case, the seal lid opens with a momentary delay when the member that interlocks with the writing body moves forward. Therefore, if a certain distance is provided between the seal lid and the tip writing part when the writing body is retreating, the tip writing part will not hit the seal lid when the writing body moves forward.

When you write with the cursive in the forward position, and when you finish writing, move the cursive back again by notching or turning, the thread-like member circulates in the opposite direction, causing the seal lid to come into close contact with the tip of the seal cylinder. Return to state. If the writing body or a member interlocking with the writing body is moved backward by rotation, it is not necessary to use a spring or the like to urge the writing body in the backward direction.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan sectional view of a writing instrument showing the first embodiment of the present invention, and FIG. 2 is a side sectional view when the writing instrument is rotated 90 degrees in the state shown in FIG. It shows the sealed state stored inside the main body.

In the figure, 1 is a front shaft, and 2 is a rear shaft having a cam groove 2a in its rear portion, and these two parts are screwed together to form a main body. A small diameter portion 3a is arranged inside the tip shaft 1 near the tip to form a seal tube 3.
The large diameter portion 3b is fixed into the tip shaft 1 by press-fitting, gluing, or the like. There are four grooves 3 in the large diameter portion 3b of the seal cylinder.
c, 3c, 3d, 3d are provided, but 3
c, 3c are 180 degrees apart, 3d, 3d are 3c, 3
c (see Fig. 10). The front and rear end surfaces of these four grooves are rounded, and the stoppers 4a, 4a of the thread-like members 4, 4 are rounded.
It is made easy to pass through the small holes of the two ears 5a, 5a of the seal lid 5 and the portions 4b, 4b having frictional resistance (see FIGS. 9 and 11).

Next, an elastic body 5b is integrally attached to the back surface of the seal lid 5, and this elastic body 5b is integrally formed with the cylindrical portion 5d via a hinge portion 5c (see FIG. 9). This cylindrical portion 5d is fitted into the small diameter portion 3a of the seal tube 3, and the seal lid 5 is attached to the vicinity of the tip hole of the small diameter portion 3a of the seal tube together with the elastic body 5b so as to be openable and closable. An O-ring 6 serving as a seal is fitted on the inner surface of the rear portion of the small diameter portion 3a of the seal cylinder, and a retaining ring 7 is press-fitted to prevent it from coming off. The O-ring 6, which is a sealing body, is made of an elastic member.

A front guide body 8 is provided in a protruding manner on a stepped portion between the small diameter portion 3a and the large diameter portion 3b of the seal cylinder 3 at a portion close to the small diameter portion 3a. The front guide body 8 has a narrow plate shape, and has two small holes at its tip (see FIGS. 9 and 10). Also, the front and rear end surfaces of these two small holes are rounded,
The thread-like members 4, 4 can easily pass through the stoppers 4a, 4a. Note that the front guide body 8 may be formed separately from the seal cylinder 3 instead of being integrated with the seal cylinder 3, and may also be provided at the seal cylinder small diameter portion 3a via an arm. Alternatively, it may be provided protruding inside the tip of the main body. Also, instead of the two small holes in the front guide body 8, two recesses may be provided.

Next, a cursive body 9 is prepared, and the cursive body 9 has a large diameter part 9a which is an ink storage part, a front small diameter part 9b,
It has a tip writing portion 9c. Further, an air hole 9d is provided near the tip of the small diameter portion 9b. Small diameter part 9b
The outer diameter of the O-ring 6 is slightly larger than the inner diameter of the O-ring 6, which is a sealing body. The small diameter portion 9b is always pressed against the O-ring 6. Further, the rear portion of the large diameter portion 9a is held by a receiving portion 10. The receiving part 10 has legs 10a protruding from the rear of the central part, and protrusions 10b, 10b for fixing both ends of the thread-like members 4, 4 on the outer periphery of the front part. The writing body 9 and the receiving part 10 do not have to be separate bodies, but the writing body 9 may be provided with a foot at the center of the rear end of the writing body, and a protrusion for fixing the protrusion of the spring receiver and the thread-like member. Alternatively, the spring may be received by a stepped portion or a protrusion of the large diameter portion 9a of the writing body 9, and both ends of the thread-like members 4, 4 may be fixed to a separate receiving portion 10. In this case, the receiving part 10 does not need to grip the writing body 9. A spring 11 is interposed between the rear step inside the large diameter part 3b of the seal cylinder 3 and the front end of the receiving part 10, so that the writing body 9 is always rearward (to the right in the figure) with respect to the main body.
I'm urging you to go. The spring 11 is made by making the small diameter part 9b of the writing body 9 slightly longer and attaching it to the seal tube 3.
It may be interposed between the inner stepped portion and the large diameter portion 9a of the writing body 9. Note that the reason why the writing body 9 does not retreat any further in FIGS. 1 and 2 is because one end of the thread-like members 4, 4 is fixed to the protrusions 10b, 10b of the receiving part 10 and pulled backward. This is because the stoppers 4a, 4a of the thread-like members 4, 4 cannot pass through the small holes in the ears 5a, 5a of the seal lid 5. A rear guide body 12 having a transparent hole 12a in the center is provided at a position rearward of the receiving portion 10 of the writing body 9 and fixed to the main body.
In the rear guide body 12, thread-like members 4,
4 passes through and turns back holes 12b, 12b, 12c, 1
2c (see FIG. 10). That is, the two thread-like members 4, 4 have one end connected to the receiving part 10.
The parts 4b, 4b (see FIG. 11) having frictional resistance pass through the grooves 3c, 3c provided at 180 degree intervals in the large diameter part 3b of the seal cylinder 3, and the parts 4b, 4b (see FIG. 11) of the seal lid 5 Stoppers 4a, 4a are provided where they pass through the small holes in the two ears 5a, 5a, and further extend through the two small holes in the front guide body 8, to the narrow groove 3 in the large diameter portion 3b of the seal tube 3.
d, 3d, and the small hole 12 of the rear guide body 12.
b, 12b, and then bent back through the small holes 12c, 12c of the rear guide body 12, and its tip (other end) is fixed to the protrusions 10b, 10b of the receiving part 10. The one end and the other end do not need to be fixed at the same location as long as both ends are fixed to a member that interlocks with the writing body or to the writing body.

Next, a knock rod 13 whose front portion is a large diameter portion 13a is housed in the rear shaft 2, and a rotary cam 1
Accommodates 4. The cam groove 2a of the rear shaft 2 cooperates with the rotary cam 14 and the tip cam surface of the large diameter portion 13a of the knock rod 13 to lock the rotary cam 14 in the forward position (writing state) or lower it to the backward position. This forward and backward movement mechanism that wobbles (storage state) is known.

The reason why there is a slight gap between the rear end step of the rear shaft 2 and the large diameter portion 13a of the knock rod 13 in FIGS. 1 and 2 is because the leg 10a of the receiving portion 10 is This is because the rotary cam 14 and the knock rod 13 cannot be moved back any further.
It just rests against the rotary cam 14 and a due to its own weight. The presence of this gap improves the close contact between the elastic body 5b of the seal lid 5 and the tip of the small diameter portion 3a of the seal cylinder, and even if some elongation occurs in the filamentous members 4, 4, it can be absorbed. Note that the gap between the large diameter portion of the receiving portion 10 and the rear guide body 12 also plays the same role.

As is clear from FIGS. 1 and 2, when the writing body 9 is stored in the main body and is not in use, the thread-like members 4 and 4 are made of a material that is resistant to friction and tension.
One end is fixed to the protrusions 10b, 10b of the receiving part 10, which are urged in the backward direction by a spring 11, and the stoppers 4a, 4a pull the seal lid 5 backward, so that the elastic body 5b and the seal The tip of the cylinder small diameter portion 3a is in close contact. Moreover, since the small diameter part 9b of the writing body 9 is elastically held by the O-ring 6 (seal body) provided behind the air hole 9d, both the tip writing part 9c and the air hole 9d are in the small diameter part of the seal tube. Sealed within 3a. The O-ring 6 (seal body) does not have to be provided on the seal tube 3 side, but may be provided on the small diameter portion 9b side of the writing body 9.

FIGS. 3 and 4 show that the sealing lid 5 is opened by slightly pushing the knob 13 from the state shown in FIGS. 1 and 2, respectively.
This shows the state when it is fully opened.

In the state shown in Figures 3 and 4, the knob 1
3 moves forward, the rotating cam 14 also moves forward (not yet rotated), and the receiving part 10 moves forward together with the writing body 9 by compressing the spring 11 via the legs 10a of the receiving part 10. At this time, as the protrusion 10b of the receiving portion 10 moves forward, the thread-like members 4, 4 also move forward, but conversely, the opposite portions of the thread-like members 4, 4 (from the front guide body 8 to the rear guide member 12) retreat. Therefore, the seal lid 5 is guided by the front guide member 8 and opens from the tip hole of the small diameter portion 3a of the seal cylinder due to the frictional resistance between the small holes of the ears 5a and the frictional resistance portions 4b of the thread-like members 4 and 4. In FIGS. 3 and 4, the seal lid 5 is fully opened to the point where it touches the front guide body 8. In the process of opening the seal lid 5, the tip writing part 9c of the writing body 9 also moves forward, but a small distance is provided between the seal lid 5 and the tip writing part 9c in the state shown in FIGS. 1 and 2. Therefore, the tip writing portion 9c does not hit the elastic body 5b attached to the back surface of the seal lid 5.

Next, FIGS. 5 and 6 show a state in which the knock rod 13 is pushed all the way, and FIG. 6 is a side sectional view obtained by rotating the state in FIG. 5 by 90 degrees. In this state, the rotary cam 14 is slightly rotated by the tip cam surface of the large diameter portion 13a of the knock rod 13. The receiving part 10 and the writing body 9 also move forward by further compressing the spring 11 since the legs 10a of the receiving part are pushed by the rotating cam. Since it is fixed, it circulates via the front guide body 8 and the rear guide body 12. Therefore, the stoppers 4a, 4a slip out from the small holes in the ears 5a, 5a of the seal lid 5, and the frictional resistance parts 4b, 4b also come out from the small holes (note that the thread members 4, 4 cover the entire area more than the small holes in the ears 5a, 5a). If the thread-like member is made thick and the entire thread-like member serves as a friction resistance part, the stopper should be placed at the ear 5 of the seal lid 5.
It cannot pass through the small holes a and 5a, but it can pass through the frictional resistance part). The stoppers 4a, 4a and the frictional resistance portions 4b, 4b both pass through the small holes of the front guide body 8, and the grooves 3d, 3 of the large diameter portion 3b of the seal cylinder.
d (see Figure 10).

Note that the stoppers 4a, 4a do not have to be thin at both ends as shown in the figure, but may be knot-like, and the thread-like members 4, 4 as a whole may be used as a friction resistance part. In this case, the front guide body 8 The front and rear end surfaces of the small hole (sometimes a recess) and the groove (sometimes a transmission hole) of the large diameter portion 3b of the seal cylinder may be further rounded so that the stopper can get over them.

7 and 8 show the state in which the tip writing portion 9c is at the writing position after the knob is released from the states shown in FIGS. 5 and 6, respectively. Figures 5 and 6
The difference from the diagram is that the rotary cam 14 further rotates along the cam surface of the cam groove and is locked in the cam groove 2a, and the stoppers 4a, 4a and the frictional resistance portion 4
b and 4b are located at positions slightly back toward the front guide body 8 than in FIGS. 5 and 6. This figure 7, 8
Write down as shown in the diagram.

When you have finished writing, once again tap the knock stick 13 all the way to the state shown in Figures 5 and 6. Next, when you release the knock stick 13, the state will go through the states shown in Figures 3 and 4, and then the state shown in Figures 1 and 1. The state shown in Figure 2 will be reached. In this process,
The direction in which the thread-like members 4, 4 move is opposite to the direction from FIGS. 1 and 2 to FIGS. 7 and 8.

In addition, FIG. 9 is an enlarged perspective view of the main part in a state where the seal lid 5 is half-opened. FIG. 10 is an enlarged perspective view of the main part showing the circulation path of the thread-like members 4, 4, and FIG. 11 is a stopper 4a, 4a provided on the thread-like members.
FIG. 3 is an explanatory cross-sectional view of the main part in a state where the frictional resistance portions 4b and 4b are fitted into the small holes on both ears of the seal lid 5.

Next, a second embodiment of the present invention will be described with reference to FIGS. 12 and 13.

FIG. 12 is an enlarged perspective view of the main parts showing the relationship between the seal tube, the seal lid, and the thread-like member, and FIG. 13 is an enlarged perspective view of the main parts showing the circulating route of the thread-like member. Note that the same parts as in the first embodiment will be described using the same reference numerals.

The second embodiment differs from the first embodiment in that there is only one thread-like member except for the part near the seal lid, and that the front guide body is provided on the seal lid. That is, the seal cylinder large diameter portion 3b
is provided with only two grooves 3c, 3c spaced apart by 180 degrees, and one thread-like member 4 passes through these two grooves 3c, 3c. The part of the thread-like member 4 near the seal lid is divided into two parts on both sides of the seal lid.
The two parts pass through the two ears 5a, 5a of the seal lid 5, and the stoppers 4a, 4a and frictional resistance parts 4b, 4b of the thread-like member 4 are located at the same positions as in the first embodiment, although not shown. It is set in. The front guide body 18 has a hinge portion 5c (first
(See FIG. 9 of the first embodiment) on the surface of the seal lid 5 (left side in FIGS. 1 and 2 of the first embodiment). The two small holes (or one hole) in the front guide body 18 include a stopper 4a and a friction resistance portion 4, as in the first embodiment.
It is designed to allow the passage of b. The small holes in the two ears 5a, 5a of the seal lid 5 form the friction resistance portion 4b.
It is the same as in the first embodiment that the stopper 4a is not passed through the stopper 4a.

However, in this second embodiment, the tip writing part 9c of the writing body 9 and the small diameter part 9b are
However, if the rear guide body 12 is the same as that of the first embodiment, the legs 1 of the receiving part 10
0a hits the thread-like member 4. Therefore, the back side of the rear guide body 12 (FIGS. 1 and 2 of the first embodiment)
A protrusion 12d is provided on the right side in the figure to allow the thread-like member 4 to detour.

In addition, in FIGS. 12 and 13, the tip of the small diameter portion 3a of the seal tube 3 is cut diagonally so that the elastic body 5b and the seal lid 5 are in close contact with each other diagonally.
This improves the adhesion when the seal lid is closed,
Moreover, it is not necessarily necessary to make it diagonal, just to make it easier to open.

The operation of the second embodiment is the same as that of the first embodiment, so a description thereof will be omitted.

Although several embodiments have been described above, the present invention is not limited to the above embodiments. For example, the front guide bodies 8, 18 may be provided at any position as long as they guide in the direction of opening the seal lid, and may be provided in any manner. If the groove or the transmission hole in the large diameter part of the seal cylinder can be used instead, the groove in the seal cylinder or the tip of the transmission hole can also serve as the front guide body. Although the seal lid is shown in which an elastic body is attached, a seal lid made of an elastic member may be attached to the small diameter portion of the seal cylinder. Further, instead of providing an elastic body on the seal lid, the tip of the seal cylinder or the small diameter portion of the seal cylinder may be made of an elastic member. The back surface of the seal lid and the tip end surface of the small diameter portion of the seal cylinder may be made smooth and the elastic body may be omitted. Various shapes and methods of providing the stopper of the filament member can be adopted. The number of small holes provided in the seal lid and the number of small holes and projections in the rear guide body can be increased or decreased as necessary. The sealing body may be provided anywhere within the main body as long as it is behind the air hole of the writing body in the stored state and can be sealed. The integration, material, shape, etc. of other parts may be arbitrary, and design changes are also possible.

(Effects of the Invention) As explained above, according to the present invention, the following effects are achieved.

(1) It is easy to use because there is no need to attach or detach the cap.

(2) Good sealing performance when the cursive writing is stored inside the main body.

(3) The structure is simple, the number of parts is small, and inexpensive materials can be used, so the manufacturing cost is low and it can be applied to disposable items.

(4) Operation is reliable and easy for the user to operate.

(5) Since it does not destroy its shape as a writing instrument, there are no problems in terms of design.

[Brief explanation of the drawing]

1 and 2 are a plan sectional view and a side sectional view of a writing instrument according to a first embodiment of the present invention, showing a state in which a writing instrument is housed in the main body, and FIGS. 3 and 4,
5, 6, 7 and 8 are a plan sectional view and a side sectional view showing changes in the operating state of the writing body, respectively. FIG. 10 is a perspective view of the entire internal structure of the writing instrument, FIG. 11 is a sectional explanatory view of the main part, and FIGS. 12 and 13 are a perspective view of the main part and the entire internal structure of the writing instrument showing the second embodiment of the present invention. FIG. 1... Front shaft, 2... Rear shaft, 2a... Cam groove, 3
...Seal tube, 3a...Small diameter part, 3b...Large diameter part, 3c, 3d...Groove, 4...Thread-like member, 4a...
...stopper, 4b...frictional resistance part, 5...
Seal lid, 5a...ear, 5b...elastic body, 6...
O-ring (seal body), 7... Retaining ring, 8,
18...front guide body, 9...cursive, 9a...
Large diameter part, 9b... Small diameter part, 9c... Tip writing part,
9d...Air hole, 10...Receiving part, 10a...
Leg, 10b... Protrusion, 11... Spring, 12
... Rear guide body, 12a ... Transmission hole, 12b,
12c...Folding hole, 13...Knot rod, 14
...rotating cam.

Claims (1)

[Claims] 1 A seal cylinder having a through hole through which the front part of the writing body appears and disappears is provided in the main body, and a means for passing a thread-like member between the seal cylinder and the main body is provided,
A seal lid having a portion that allows the thread-like member to pass through the frictional resistance portion but prevents the stopper from passing is attached so as to be openable and closable near the tip hole of the seal tube, and is placed inside the main body behind the air hole when the writing body is stored. A seal body is provided, and a writing body having a tip writing part and an air hole is housed in the main body, and an advance/retreat mechanism is provided for placing the writing body in a writing state and a storage state, and a thread-like member passes through the body near the seal lid. A front guide body is installed to guide the seal lid in the opening direction, while a rear guide body is provided in the main body at the rear part of the writing body to guide the thread-like member in the folding direction, and one end of the thread-like member is interlocked with the writing body. The other end goes around the seal tube, the seal lid, the front guide body, the opposite side of the seal tube, and the rear guide body, and then is fixed to a member that interlocks with the writing body. The seal lid is brought into close contact with the tip of the seal cylinder by the retraction force of the member interlocking with the thread-like member and the stopper of the thread-like member.
A cat press writing instrument having a drying prevention mechanism, characterized in that the seal lid is opened by frictional resistance between the seal lid and a frictional resistance portion of a thread-like member when the writing body moves forward.