JP3139755U - Knock-type writing instrument - Google Patents

Abstract

An object of the present invention is to stably maintain a state in which a writing portion protrudes from a front end of a shaft cylinder without increasing the number of parts and to increase the elasticity of a clip.
A knock-type writing instrument is inserted into a shaft cylinder having a long hole formed around it, a writing body inserted into the shaft cylinder and biased backward by an elastic body, and a rear part of the shaft cylinder. Knocked body 16, an elastic piece 17 whose front end is connected to the knock body 16 and can be bent, and the rear end is the rear end of the long hole 11 a in a state where the writing part 12 a is immersed in the shaft cylinder. And a clip 19 whose rear portion is connected to the leg portion 18. A locking projection 21 is formed at the rear end of the elastic piece 17 so as to be locked to the rear end of the elongated hole in a state where the writing portion 12a protrudes from the shaft cylinder, and the locking projection 21 is formed at the rear end of the elastic piece 17. The elastic piece 17 is configured such that the rear end of the elastic piece 17 is elastically deformed into the shaft tube so that the engagement with the rear end of the long hole 11a is released.
[Selection] Figure 1

Description

  The present invention relates to a knock type writing instrument in which a writing body of a writing body inserted into a shaft cylinder is projected from a front end of the shaft cylinder by pressing a knock body protruding rearward from the rear end of the shaft cylinder.

  Conventionally, as such a knock-type writing instrument, a shaft tube, a writing body slidably inserted into the shaft tube, an elastic body that urges the writing body rearward, and an urging force of the elastic body A thing provided with a knocking body which moves a cursive body forward is known (for example, refer to patent documents 1). In this knock-type writing instrument, a long hole extending in the axial direction is formed around the rear portion of the shaft cylinder, and a leg portion inserted through the long hole is formed in a knock body inserted in the rear portion of the shaft cylinder. The rear part of the clip provided along the shaft cylinder is connected to the leg part. In addition, a locking projection is formed at the front end of the clip, and the locking projection is engaged with the shaft cylinder in front of the long hole at a position at a distance equal to the moving amount of the cursive body in front of the position of the locking projection of the clip. A locking hole for stopping is formed. Then, when the cursive body is moved forward by pressing the knock body against the urging force of the elastic body, the locking projection at the front end of the clip is locked in the locking hole, whereby the front portion of the cursive body It is comprised so that the writing part in may be protruded from the front end of the shaft cylinder.

  However, in this writing instrument, the angle between the clip and the leg is the angle between the clip and the leg when the clip is attached to the shaft cylinder because the locking projection at the front end of the clip needs to be maintained in the locking hole. When the clip is attached to the shaft cylinder, the angle between the clip and the leg is widened with the base of the clip and the leg as a fulcrum, and the front end of the clip is pivoted by the elastic force to be restored. It was pressed against the surface of the tube. In addition, in order to immerse the writing part into the shaft tube, it is necessary to disengage the locking protrusion at the front end of the clip from the locking hole, and in this case, the front end of the clip with the base part of the clip and the leg as a fulcrum Was separated from the barrel. Therefore, in order to always keep the front end of the clip pressed against the surface of the barrel, and to disengage the locking projection at the front end of the clip from the locking hole, an excessive load is applied to the base portion of the clip and the leg. was there.

In order to eliminate this point, as shown in FIG. 13, it has been proposed to provide the elastic piece 7 on the knock body 6 and to provide the leg portion 8 on the elastic piece 7 (see, for example, Patent Document 2). . In this knock-type writing instrument, the leg 8 is connected to the knock body 6 via the elastic piece 7, so that the front end of the clip 9 is always pressed against the surface of the shaft cylinder 1 by the elasticity of the clip 9. As shown in FIG. 5, when the locking projection 9a at the front end of the clip 9 is separated from the locking hole 1a, the elastic piece 7 is elastically deformed and curved. Thereby, the load applied to the base portion of the clip 9 and the leg portion 8 can be distributed to the elastic piece 7, and it is possible to avoid the load being concentrated and applied to the base portion.
Reality 5-25915 Reality No. 6-15741

However, in the above conventional knock type writing instrument in which the leg portion 8 is connected to the knock body 6 via the elastic piece 7, there is a force for locking the locking projection 9 a at the front end of the clip 9 in the locking hole 1 a of the shaft tube 1. It becomes unstable to weaken and maintain the writing part 2a in a state of protruding from the front end of the shaft tube 1, and the locking protrusion 9a at the front end of the clip 9 is detached from the locking hole 1a to make the writing part 2a the shaft tube. There was a problem that it was relatively difficult to immerse in No. 1.
That is, conventionally, the clip 9 and the leg portion 8 are angled with respect to the clip 9 in a state in which the clip 9 is attached to the shaft tube 1 in order to ensure the elastic force with which the front end of the clip 9 presses the surface of the shaft tube 1 The angle of the clip 9 and the leg 8 is widened in a state where the clip 9 is attached to the shaft cylinder 1 and the front end of the clip 9 is made to be restored by the elastic force to be restored. 1 is pressed against the surface.

  However, when the elastic piece 7 is provided on the knock body 6 and the leg portion 8 is formed on the elastic piece 7, the angle of the clip 9 and the leg portion 8 is set to the clip 9 and the leg portion 8 in a state where the clip 9 is attached to the shaft tube 1. If the clip 9 is attached to the shaft tube 1 and the angle between the clip 9 and the leg portion 8 is expanded, the elastic piece 7 is also elastically deformed. Then, the angle at which the clip 9 and the leg 8 are expanded to reduce the angle required to secure the elastic force with which the front end of the clip 9 presses against the surface of the shaft cylinder 1 is reduced as compared with the prior art. The resilience that presses against the surface of the shaft cylinder 1 also decreases. When this elastic force of pressing decreases, the force for locking the locking projection 9a at the front end of the clip 9 to the locking hole 1a of the shaft tube 1 is weakened, and the writing portion 2a is protruded from the front end of the shaft tube 1. There has been a problem that maintaining the state becomes unstable as compared with the conventional case in which the elastic piece 7 is not provided.

  Further, in order to immerse the writing part 2a into the shaft cylinder 1 in this knock type writing instrument, as shown by the arrow P in FIG. 13, the rear part 9b of the clip 9 behind the leg part 8 is pressed toward the shaft cylinder 1 side. The clip 9 is swung around the leg 8 by this, so that the front end of the clip 9 in front of the leg 8 is separated from the outer surface of the shaft tube 1 and the locking projection 9a at the front end of the clip 9 is locked into the locking hole. It is supposed to be separated from 1a.

  However, in the conventional knock type writing instrument in which the leg portion 8 is connected to the knock body 6 via the elastic piece 7, when the rear portion 9b of the clip 9 is pressed toward the shaft tube 1 as shown in FIG. The elastic piece 7 provided with a curve is curved, and its leg portion 8 is immersed in the shaft tube 1 so that the clip 9 cannot be largely swung. For this reason, the front end of the clip 9 in front of the leg portion 8 cannot be largely separated from the outer surface of the shaft tube 1, and the locking protrusion 9 a is separated from the locking hole 1 a and the writing portion 2 a is moved to the shaft tube 1. There was a problem that it was relatively difficult to immerse.

  Further, the writing part 2a is in a state of being immersed in the shaft tube 1, and the clip 1 is opened after the front end thereof is opened from the shaft tube 1, and a cloth such as a pocket (not shown) is inserted between the clips 1 to be restored. With 1, the cloth is sandwiched so that the writing instrument is held in the pocket or the like. However, even if the rear portion 9b of the clip 9 is pressed toward the shaft tube 1 in order to open the front end of the clip 1, if the leg portion 8 is immersed in the shaft tube 1, the clip 9 is greatly swung. The front end of the clip 9 cannot be greatly opened from the shaft cylinder 1 without being able to. For this reason, there also existed a malfunction which cannot clamp a comparatively thick part with a clip.

  In order to eliminate these points, in the conventional knock type writing instrument in which the elastic piece 7 is provided on the knock body 6, the spring 5 is attached between the elastic piece 7 and the knock body 6, and the leg portion 8 is attached by the spring 5. Unnecessary elastic deformation of the elastic piece 7 other than preventing excessive load from being applied to the base portion between the clip 9 and the leg portion 8 is prevented, thereby preventing the front end of the clip 9 from pivoting. It is avoided that the elastic force which presses the surface of the cylinder 1 decreases. However, attaching such a spring 5 between the elastic piece 7 and the knock body 6 causes an increase in the number of mounting steps as well as the number of parts, resulting in a problem that the unit price of the product is increased.

  The purpose of the present invention is to stably maintain the state where the writing part protrudes from the front end of the shaft tube without increasing the number of parts, and to relatively easily immerse the writing part into the shaft tube, An object of the present invention is to provide a knock type writing instrument capable of increasing a gripping force in a clip.

  As shown in FIGS. 1 and 2, the device according to claim 1 includes a shaft cylinder 11 formed with an elongated hole 11 a extending in the axial direction, and a writing portion 12 a at the front end that can be projected and retracted from the front end of the shaft cylinder 11. A writing body 12 inserted into the cylinder 11 and urged rearward by the elastic body 14, and a rear part of the shaft cylinder 11 so as to abut the rear end of the writing body 12 and protrude rearward from the rear end of the shaft cylinder 11. The inserted knock body 16, the elastic piece 17 provided along the knock body 16 inserted in the shaft cylinder 11 and having a front end connected to the knock body 16 and bendable, and the elastic piece 17 provided in the elongated hole 11 a. A knock-type writing instrument 10 comprising a leg 18 that is movably inserted in the front-rear direction, and a clip 19 that is connected to the leg 18 and is provided outside the shaft cylinder 11 and elastically presses against the outer periphery of the shaft cylinder 11. It is an improvement.

  In the writing instrument according to claim 1, the locking protrusion 21 that is locked to the rear end of the long hole 11 a in a state where the writing portion 12 a protrudes from the shaft cylinder 11 and can maintain the protruding state of the writing portion 12 a is provided with the elastic piece 17. The locking projection 21 is formed at the rear end of the elastic piece 17 so that the locking of the rear end of the elongated hole 11a is released when the rear end of the elastic piece 17 is elastically deformed inside the shaft cylinder 11. Features.

  In the knock type writing instrument described in claim 1, the angle of the clip 19 and the leg portion 18 is attached in the same manner as in the past in order to ensure the elastic force with which the front end of the clip 19 presses the surface of the shaft cylinder 11. The angle between the clip 19 and the leg 18 is formed smaller than the angle between the clip 19 and the leg 18, and the angle between the clip 19 and the leg 18 is expanded in a state where the clip 19 is attached to the shaft cylinder 11. Since the latching protrusion 21 is formed on the elastic piece 17, the latching projection 21 which is bent at the elastic piece 17 and locked to the rear end of the long hole 11a is detached from the long hole 11a. The locking protrusion provided at the front end of 19 can be made easier than detachment from the locking hole of the shaft tube. Therefore, the locking projection 21 can be locked to the rear end of the long hole 11a with a relatively large force, and thus the writing portion 12a can be stably maintained in a state of protruding from the shaft tube 11. .

The device according to claim 2 is the device according to claim 1, wherein the front end of the clip 19 is pressed against the outer periphery of the shaft cylinder 11, and the leg portion 18 is an intermediate portion of the elastic piece 17 in front of the locking projection 21. It is characterized by being provided in.
In the knock type writing instrument according to the second aspect, the leg portion 18 is not formed at the rear end of the elastic piece 17 on which the locking projection 21 is formed, but in the middle of the elastic piece 17 in front of the locking projection 21. Formed in the part. Therefore, by forming the leg portion 18 in the middle portion of the elastic piece 17 in front of the locking projection 21, it is possible to increase the elasticity required to move the leg portion 18 by bending the elastic piece 17. it can. As a result, the spring 5 in FIG. 13 which is conventionally required for causing the leg portion 18 to spring outward from the shaft cylinder 11 can be eliminated, and the elastic piece 17 can be formed without increasing the number of parts. Unnecessary elastic deformation can be prevented, so that it is possible to avoid a reduction in the elastic force with which the front end of the clip 19 presses against the surface of the shaft tube 11.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the locking hole 11e into which the locking protrusion 21 can enter in the state where the writing portion 12a is immersed in the shaft cylinder 11 is provided at the rear of the long hole 11a. The shaft tube 11 is formed.
In the knock type writing instrument according to the third aspect, the elastic piece 17 is elastically deformed and the locking projection 21 is buried in the shaft cylinder 11 to cancel the locking state with the elongated hole 11a. Since the locking hole 11e into which the locking projection 21 can enter is formed in the shaft tube 11 in a state where the portion 12a is immersed in the shaft tube 11, the writing portion 12a is formed in the shaft tube 11 in a state where the elastic piece 17 is elastically deformed. Can be resolved in an immersive state. Therefore, the elastic piece 17 can be prevented from sag due to the elastic deformation of the elastic piece 17 being maintained.

The device according to claim 4 is the device according to claim 3, and further, as shown in FIGS. 3 and 4, the shaft tube 11 penetrates the locking hole 11 e from the rear end of the shaft tube 11 and is a long hole. A slit 11f reaching 11a is formed in the longitudinal direction.
In the knock type writing instrument according to the fourth aspect, the leg portion 18 is positioned in the slit 11f of the shaft cylinder 11, the slit 11f is widened, and the leg portion 18 is moved forward. Thus, the leg portion 18 passes through the locking hole 11e and reaches the long hole 11a. Therefore, the leg portion 18 can be inserted into the elongated hole 11a of the shaft tube 11 relatively easily, and a knock type writing instrument that is relatively easy to manufacture can be obtained.

The device according to claim 5 is the device according to claim 3 or 4, wherein an operation portion 22 extending rearward beyond the leg portion 18 is formed at the rear portion of the clip 19, and the writing portion 12 a is immersed in the shaft tube 11. In this state, the operation unit 22 is configured to cover the locking hole 11e.
In the knock type writing instrument according to the fifth aspect, since the operation portion 22 covers the locking hole 11e in a state where the writing portion 12a is immersed in the shaft tube 11, the locking hole 11e is exposed to the outside. It is possible to prevent deterioration in appearance due to the appearance.

The device according to claim 6 is the device according to any one of claims 3 to 5, wherein the rear end of the leg portion is at the rear end of the long hole 11 a in a state where the writing portion 12 a is immersed in the shaft tube 11. It is comprised so that it may contact | abut, The space | interval of the rear end of the leg part 18 and the latching protrusion 21 is equal, and the space | interval of the rear end of the long hole 11a and the latching hole 11e is equal. .
In the knock type writing instrument described in claim 6, the rear end of the leg portion 18 abuts the rear end of the long hole 11 a in a state where the writing portion 12 a is immersed in the shaft cylinder 11, and the rear surface 21 b of the locking projection 21 is It will contact the rear end of the locking hole 11e. For this reason, the rear surface 21b of the locking projection 21 is located behind the locking hole 11e so that the rear end of the leg 18 abuts the rear end of the long hole 11a and maintains the state where the writing portion 12a is immersed in the shaft tube 11. It can disperse | distribute to this part by contact | abutting to an edge, and can maintain stably the state where the writing part 12a was immersed in the axial cylinder 11 by this. Further, for example, when the slit 11f is formed, the slit 11f is prevented from expanding due to the rear end of the leg 18 being excessively in contact with the rear end of the long hole 11a. A situation in which the inserted leg 18 is detached from the slit 11f can be effectively avoided.

The device according to claim 7 is the device according to claim 6, wherein the knock body 16 has a rear portion protruding rearward from the rear end of the shaft tube 11 and a predetermined interval forward from the knock portion 16 a. A contact portion 16b that contacts the rear end of the writing body 12, a knock portion 16a, and a connection portion 16c that connects the contact portion 16b. The elastic piece 17 is connected to the connection portion 16c at a predetermined interval. The front end is connected to the contact portion 16b, and the rear end of the leg portion 18 abutting against the rear end of the long hole 11a goes straight to the shaft tube 11 or moves backward toward the clip 19. The elastic body 14 which is formed to be inclined and biases the writing body 12 rearward is configured to press the rear end of the leg portion 18 against the rear end of the long hole 11a so that the leg portion 18 protrudes to the outside of the shaft tube 11. It is characterized by that.
In the knock type writing instrument according to the seventh aspect, the elastic body 14 urges the writing body 12 backward to cause the leg 18 to protrude to the outside of the shaft cylinder 11, so that the front end of the elastic piece 17 is centered. The clip 19 connected to the leg portion 18 is rotated, and the front end of the clip 19 can be pressed against the outer periphery of the shaft tube 11 with a relatively strong force. As a result, the gripping force in the clip 19 can be increased.

  The device according to claim 8 is the device according to any one of claims 1 to 6, and as shown in FIG. 7, the knock body 16 is a knock whose rear portion protrudes rearward from the rear end of the shaft cylinder 11. An elastic piece having a contact portion 16b provided at a predetermined interval forward from the portion 16a and the knock portion 16a, and a connecting portion 16c connecting the knock portion 16a and the contact portion 16b; 17 is arranged in parallel with the connecting portion 16c with a predetermined distance from the connecting portion 16c, the front end is connected to the contact portion 16b, and the connecting portion 16c is released from the rear end of the long hole 11a. Alternatively, the support protrusion 26 that abuts on the elastic piece 17 is formed on the intermediate portion of the elastic piece 17 or the connecting portion 16c facing the leg portion 18.

  In the knock type writing instrument according to the eighth aspect, the support protrusion 26 comes into contact with the connecting portion 16c or the elastic piece 17 in a state in which the locking protrusion 21 is released from the rear end of the long hole 11a, and the leg portion 18 As described above, it is possible to prevent the shaft cylinder 11 from being immersed. Then, for example, when the operation portion 22 is further pressed, the clip 19 then swings around the leg portion 18 that is prohibited from being further inserted into the shaft cylinder 11, and the front end of the clip 19 is relatively moved from the shaft cylinder 11. Open wide. On the other hand, when the pressing of the operation unit 22 is released, the clip 19 causes the front end of the clip 19 to press against the surface of the shaft cylinder 11 by the restoring force of elastic deformation around the leg 18. Thereby, it can prevent that the elastic force which the front end of the clip 19 presses the surface of the axial cylinder 11 reduces, and the elastic piece 17 after releasing the latching protrusion 21 from the rear end of the long hole 11a. Thus, it is possible to prevent the elastic deformation of the clip 19 and secure the force with which the front end of the clip 19 holds the cloth such as the pocket together with the shaft tube 11.

The device according to claim 9 is the device according to claim 8, characterized in that, as shown in FIG. 10, the support protrusion 26 is formed in an elastic piece or a connecting portion so as to bendable by elasticity. To do.
When the clip 19 is elastically deformed in a state where the support protrusion 26 is in contact with the connecting portion 16c or the elastic piece 17, a force is applied to the base portion of the clip 19 and the leg portion 18 and the support protrusion 26. In the knock-type writing instrument, the inclined support protrusion 26 is bent by elasticity to absorb the force applied to the base part of the clip 19 and the leg 18 and the support protrusion 26, and the base part and the support protrusion 26. It can be avoided that an excessive load is applied to the.

In the knock type writing instrument of the present invention, a locking projection that can be locked to the rear end of the elongated hole and maintain the protruding state of the writing portion at the rear end of the elastic piece inside the shaft tube with the writing portion protruding from the shaft tube. Since it is formed, it is possible to increase the urging force for locking the locking projection to the rear end of the elongated hole as compared with the conventional case where the locking projection is formed at the front end of the clip. Therefore, it becomes possible to stably maintain the writing unit in a state of protruding from the front end of the shaft tube.
Further, since the elastic piece is elastically deformed inside the shaft cylinder, the locking protrusion is released from being locked to the rear end of the long hole, so that it is relatively simple to simply press the clip to the shaft cylinder side. With this operation, the locking projection can be detached from the rear end of the long hole, and the writing portion can be immersed in the shaft tube relatively easily.

  Then, the leg portion is not formed at the rear end of the elastic piece on which the locking projection is formed, but is formed at the middle portion of the elastic piece in front of the locking projection, thereby moving the leg portion. Power can be increased. Therefore, it is possible to eliminate the need for a spring that is conventionally required for projecting the leg portion outward from the shaft cylinder, and to prevent unnecessary elastic deformation of the elastic piece without increasing the number of parts. As a result, it is possible to avoid a reduction in the elastic force with which the front end of the clip presses the shaft tube. Then, the elastic piece is juxtaposed with the connecting portion at a predetermined interval, the front end thereof is connected to the contact portion, and the rear end of the leg portion that abuts the rear end of the elongated hole is made to go straight to the shaft tube or clip. If it is formed to be inclined so as to move backward as it goes to the side, the elastic body presses the rear end of the leg portion against the rear end of the long hole so that the leg portion protrudes outside the shaft tube, and the tip of the clip is relatively It can be pressed against the outer periphery of the shaft cylinder with a strong force, and the gripping force on the clip can be increased.

  Furthermore, even if the support protrusion that contacts the connecting portion or the elastic piece in the state where the locking protrusion is released from the rear end of the long hole is formed on the intermediate portion or the connecting portion of the elastic piece, the front end of the clip is the surface of the shaft cylinder. It is possible to prevent the elastic force that presses down from decreasing, and if the supporting projection is tilted, it will be bent due to elasticity and an excessive load will be applied to the base of the clip and the leg and the supporting projection. Can be avoided.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the knock type writing instrument 10 of the present invention has a shaft tube 11 having a long hole 11 a extending in the axial direction around the shaft tube 11 and a writing portion 12 a at the front end protruding from the front end of the shaft tube 11. A cursive body 12 inserted into the shaft cylinder 11 is provided. The writing body 12 in this embodiment is a so-called ballpoint pen having a writing portion 12a and a resin pipe 12b, and the front portion of the resin pipe 12b is spring-stopped by extending both sides at a predetermined interval from the front end edge thereof. 12c is formed, and a coil spring 14 that is an elastic body is fitted into the resin pipe 12b in front of the spring stopper 12c. On the inner surface of the front portion of the shaft tube 11, a step portion 11d is formed, in which the writing body 12 can be inserted but the coil spring 14 cannot pass. The coil spring 14 is compressed with the front end in contact with the step portion 11d. It is comprised so that the writing body 12 may be urged | biased to the back of the axial cylinder 11 with a resilient force.

  The long hole 11a formed in the shaft tube 11 is formed at the rear portion of the shaft tube 11 so as to extend in the longitudinal direction to a portion corresponding to an elastic piece 17 described later and to communicate the inside and outside of the shaft tube 11. As shown in FIGS. 3 and 4, a locking hole 11 e is formed around the shaft cylinder 11 behind the long hole 11 a so as to be coaxial with the long hole 11 a, and the locking hole is formed from the rear end of the shaft cylinder 11. A slit 11f that penetrates 11e and reaches the long hole 11a is formed in the longitudinal direction. The space between the rear end of the long hole 11a and the rear end of the locking hole 11e is such that the writing body 12 immersed in the shaft cylinder 11 moves forward, and the writing portion 12a at the front end moves forward from the front end of the shaft cylinder 11. It is formed equal to the moving distance until it projects. The slit 11f is configured to be expandable by the elasticity of the shaft tube 11, and the width thereof is formed smaller than the width of the leg portion 18 described later.

  As shown in FIGS. 1 to 4, a knock body 16 is inserted into the rear portion of the shaft cylinder 11. The knock body 16 is provided with a cylindrical knock portion 16a having an outer diameter slightly smaller than the inner diameter of the shaft cylinder 11, and a rear end of the writing body 12 in contact with the knock portion 16a at a predetermined interval. A cylindrical contact portion 16b, and a flat connecting portion 16c that connects the knock portion 16a and the contact portion 16b. The contact portion 16b and the connecting portion 16c are inserted into the rear portion of the shaft tube 11 from the rear, and the rear portion of the knock portion 16a is rearward from the rear end of the shaft tube 11 in a state where the rear end of the writing body 12 is in contact with the contact portion 16b. Configured to protrude.

  On the other hand, an elastic piece 17 is juxtaposed with the connecting portion 16c at a predetermined interval, and the front end of the elastic piece 17 is connected to the contact portion 16b. Thereby, this elastic piece 17 is provided along the knock body 16 inserted in the shaft cylinder 11, and the rear end thereof is configured to be movable by bending. The elastic piece 17 is formed with a leg portion 18 that can be inserted into the elongated hole 11 a in the shaft tube 11. The long hole 11a is formed to be slightly wider than the width of the leg portion 18, and the leg portion 18 is formed to be movable in the front-rear direction for a distance slightly longer than the moving distance of the writing body 12 while being inserted through the long hole 11a. . Then, in order to insert the leg portion 18 into the elongated hole 11a of the shaft tube 11, as shown in FIG. 4, the leg portion 18 is positioned in the slit 11f of the shaft tube 11, and the slit 11f is expanded to knock. The leg 18 is moved forward together with the body 16, and the leg 18 is advanced to the long hole 11a through the widened slit 11f. After that, the expanded slit 11f is restored by elasticity, whereby the leg 18 is inserted into the long hole 11a, and the leg 18 is inserted inside the long hole 11a so as to be movable in the front-rear direction. Then, as shown in FIG. 2, the writing body 12 moves rearward so that the rear end of the leg portion 18 abuts the rear end of the long hole 11a in a state where the writing portion 12a is immersed in the shaft tube 11. Composed.

  The rear part of the clip 19 is connected to the leg part 18. The clip 19 is provided outside the shaft tube 11 along the axial direction, and its front end is pressed against the outer periphery of the shaft tube 11 by its elasticity. The clip 19 is formed to be relatively longer than the elastic piece 17 on which the leg portion 18 is formed, and the front end of the clip 19 is pressed against the outer periphery of the shaft tube 11 in front of the contact portion 16b in the knock body 16 by the elasticity of the clip. The knock body 16, the elastic piece 17, the leg portion 18, and the clip 19 are resin molded products, which are integrally formed at the time of resin molding, and the elongated hole 11 a is inserted in the state where the writing portion 12 a is immersed in the shaft cylinder 11. The rear end of the leg 18 in contact with the rear end is formed so as to go straight to the shaft tube 11 or to move backward as it goes toward the clip 19. Here, FIG. 2 shows a case where the rear end of the leg portion 18 is formed so as to go straight to the shaft cylinder 11. The leg 18 connects the middle part of the elastic piece 17 in front of the locking projection 21 and the rear part of the clip 19, and the elastic piece 17 elastically connects the rear part of the clip 19 via the leg part 18 to the shaft 11. Configured to bounce outward. Further, even in the elastic body 14 that urges the writing body 12 backward, the rear end of the leg portion 18 that is formed perpendicularly or inclined to the shaft cylinder 11 is pressed against the rear end of the long hole 11a. The leg portion 18 is configured to protrude outside the shaft tube 11.

  A characteristic configuration of the present invention is that a locking projection 21 that locks to the rear end of the elongated hole 11a in a state in which the writing portion 12a protrudes from the shaft cylinder 11 is provided on the outer end in the radial direction of the shaft cylinder 11 at the rear end of the elastic piece 17. It is in the place formed so that it may protrude toward. The locking projection 21 in this embodiment is formed so that its front surface 21 a is inclined toward the inside of the shaft tube 11 toward the front end of the shaft tube 11, and its rear surface 21 b is orthogonal to the shaft tube 11. Composed. And this latching protrusion 21 will be in the state which the rear surface 21b orthogonal to the axial cylinder 11 contact | abutted to the rear end of the long hole 11a, and latched to the rear end of the long hole 11a, and this writing state of the writing part 12a It is configured to maintain the protruding state. In other words, the locking protrusion 21 has the elastic piece 17 so that the distance from the rear end of the leg 18 to the rear surface 21b of the locking protrusion 21 and the distance by which the writing body 12 advances by knocking the knock body 16 are equal. The rear surface 21b of the locking projection 21 is configured to be locked to the rear end of the long hole 11a with the writing body 12 moving forward and the writing portion 12a protruding from the shaft tube 11. On the other hand, as shown in FIG. 5, the protruding amount of the locking projection 21 to the outer side in the radial direction of the shaft cylinder 11 is formed smaller than the distance between the connecting portion 16 c and the elastic piece 17. By being elastically deformed, the engagement state of the engagement protrusion 21 with the rear end of the long hole 11a is released.

  As shown in FIG. 2, the locking hole 11 e formed around the shaft cylinder 11 behind the long hole 11 a is formed to be larger than the locking projection 21, so that the writing portion 12 a is immersed in the shaft cylinder 11. The locking projection 21 is configured to be able to enter the locking hole 11e. The leg 18 is formed so that the distance between the rear edge of the leg 18 and the rear surface 21b of the locking projection 21 is equal to the distance between the rear edge of the elongated hole 11a and the rear edge of the locking hole 11e. The rear surface 21b of the locking projection 21 is configured to contact the rear end of the locking hole 11e in a state where the rear end of the portion 18 contacts the rear end of the long hole 11a and the writing portion 12a is immersed in the shaft tube 11. The In addition, an operation portion 22 that extends rearward beyond the leg portion 18 is formed at the rear portion of the clip 19. The operation portion 22 is configured to cover the locking hole 11e in a state where the writing portion 12a is immersed in the shaft tube 11, and the locking hole 11e is exposed to the outside in a state where the writing portion 12a is immersed in the shaft tube 11. To avoid and improve the appearance of the appearance.

  In the knock type writing instrument configured as described above, when the knock body 16 is pressed, the writing body 12 moves forward in the shaft cylinder 11, and the writing portion 12 a protrudes from the front end of the shaft cylinder 11. When the writing part 12a protrudes from the shaft tube 11, the locking protrusion 21 formed at the rear end of the elastic piece 17 is locked to the rear end of the long hole 11a, and the protruding state of the writing part 12a is maintained (FIG. 1). ). And since the latching protrusion 21 is formed in the elastic piece 17 instead of the clip formed in the conventional product, the latching protrusion 21 which curved the elastic piece 17 and latched to the rear end of the long hole 11a is the length. The force for detaching from the hole 11a can be increased compared to the conventional force for detaching the locking protrusion at the front end of the clip from the locking hole of the shaft tube. That is, by forming the locking projection 21 at the rear end of the elastic piece 17 shorter than the distance to the front end of the clip 19 with respect to the knock body 16, the locking projection 21 is compared with the rear end of the long hole 11a. It can be locked with a large elastic force, and it is possible to stably maintain the state in which the writing portion 12a protrudes from the shaft tube 11.

  On the other hand, as shown in FIG. 5, when the operating portion 22 formed continuously at the rear end of the clip 19 is pressed in the direction of the shaft tube 11, the elastic piece 17 is elastically deformed into the shaft tube 11 and the locking projection 21. Can be detached from the rear end of the long hole 11a. Then, as shown in FIG. 2, the writing body 12 and the knocking body 16 move rearward due to the elastic body 14 made of a coil spring, and the writing portion 12 a is immersed in the shaft tube 11. Therefore, the locking projection 21 can be detached from the rear end of the long hole 11 a relatively easily, and the writing portion 12 a can be reliably immersed in the shaft tube 11. In order to immerse the writing part 12a into the shaft tube 11, it is only necessary to elastically deform the elastic piece 17 into the shaft tube 11, so that an excessive load is applied to the base portion of the clip 19 and the leg part 18. There is no.

  Moreover, since the leg part 18 is formed in the intermediate part of the elastic piece 17 ahead of the latching protrusion 21, the elastic force for moving the leg part 18 can be increased. Therefore, the spring 6 in FIG. 13 which has been conventionally required for causing the leg portion 18 to be ejected outward from the shaft cylinder 11 can be made unnecessary, and the elastic piece 17 is not increased without increasing the number of parts. Necessary elastic deformation can be prevented, so that it is possible to avoid a decrease in the elastic force with which the front end of the clip 19 presses against the surface of the shaft tube 11. Further, since the locking protrusions that are conventionally formed on the clip 19 are not formed, the degree of freedom in designing the clip 19 is improved, and even if the elasticity of the front end of the clip 19 pressing against the surface of the shaft cylinder 11 is increased. The locking projection is not pressed against the cloth sandwiched between the clip 19 and the shaft tube 11, and the cloth is not damaged.

  Even after the locking projection 21 is disengaged from the rear end of the long hole 11a, when the operating portion 22 is further pressed in the direction of the shaft tube 11, the rear portion of the elastic piece 17 contacts the connecting portion 16c as shown in FIG. When the operating portion 22 is further pressed in the direction of the shaft tube 11, the clip 19 formed integrally with the operating portion 22 swings around the leg portion 18, and the front end of the clip 19 is the outer surface of the shaft tube 11. Separate from. If a cloth such as a pocket (not shown) is inserted between the front end of the clip 19 and the shaft cylinder 11 and then restored, the cloth 19 is sandwiched between the front end of the clip 19 and the shaft cylinder 11. Thus, the writing instrument 10 can be attached to the pocket or the like.

  Here, in the writing instrument 10 of the present invention, the conventional spring 5 in FIG. 13 that inhibits the bending of the elastic piece 17 is not interposed between the elastic piece 17 and the connecting portion 16c, so that the elastic piece 17 is sufficiently bent. Sufficient rocking of the clip 19 around the leg portion 18 can be ensured, and the front end of the clip 19 can be greatly opened from the shaft tube 11. For this reason, the opening between the front end of the clip 19 and the shaft cylinder 11 can also be performed by operating the operation unit 22, and an article having a maximum thickness can be formed in the gap between the front end of the clip 19 and the shaft cylinder 11. The clip 19 can be inserted and clamped. Further, since the rear end of the leg portion 18 that abuts the rear end of the long hole 11a is formed so as to be perpendicular to or inclined with respect to the shaft tube 11, when the operation portion 22 is pressed toward the shaft tube 11, the rear end of the leg portion 18 is formed. Is pressed against the rear end of the long hole 11a, and the knock body 16 moves forward. Therefore, a cloth such as a pocket (not shown) can be relatively easily inserted into the gap between the front end of the clip 19 and the shaft tube 11.

  On the other hand, when a cloth such as a pocket (not shown) is inserted between the front end of the clip 19 and the shaft cylinder 11 and then the pressing of the operation portion 22 is released, the elastic piece 17 is restored and the leg portion 18 is moved outside the shaft cylinder 11. The clip 19 connected to the leg portion 18 has its front end elastically pressed against the outer periphery of the shaft tube 11 to sandwich the fabric and the like, and the writing instrument 10 is attached to a pocket or the like. That is, in the writing instrument 10 of the present invention, the elasticity of both the clip 19 and the elastic piece 17 can generate a resilient force in which the front end of the clip 19 holds the fabric or the like together with the shaft tube 11. In particular, in this embodiment, since the rear end of the leg portion 18 is formed so as to be perpendicular to or inclined with respect to the shaft cylinder 11, the elastic body 14 urges the writing body 12 rearward so that the leg portion 18 is moved to the shaft cylinder 11. Project outside. For this reason, the clip 19 connected to the leg portion 18 can be rotated around the front end of the elastic piece 17, and the tip of the clip 19 can be pressed against the outer periphery of the shaft tube 11 with a relatively strong force. As a result, the gripping force of the clip 19 can be increased, and the writing tool 10 can be securely attached to the pocket or the like by the clip 19.

In the above-described embodiment, the case where the writing body 12 is a ballpoint pen has been described as an example. However, the writing body 12 may be a so-called sign pen, marking, or the like.
Further, in the above-described embodiment, the leg portion 18 is formed in the middle portion of the elastic piece 17 in front of the locking projection 21 to increase the resilience for moving the leg portion 18, which has been conventionally required. Although the spring 6 in FIG. 13 is not required, in order to prevent unnecessary elastic deformation of the elastic piece 17 without increasing the number of parts, as shown in FIG. 7, it is locked from the rear end of the long hole 11a. Even when the protrusions 21 are released, the support protrusions 26 that contact the connecting portions 16c or the elastic pieces 17 may be formed on the intermediate portions of the elastic pieces 17 on which the leg portions 18 are formed or the connecting portions 16c facing the leg portions 18. good. Although FIG. 7 shows a case where the support protrusion 26 that contacts the connecting portion 16 c is formed in the middle portion of the elastic piece 17, the support protrusion 26 that contacts the elastic piece 17 is formed on the connecting portion 16 c facing the leg portion 18. May be.

  In the knock-type writing instrument in which such a support protrusion 26 is formed, as shown in FIG. 8, the support protrusion 26 is connected to the connecting portion 16c or the elastic piece 17 in a state where the locking protrusion 21 is released from the rear end of the long hole 11a. The elastic piece 17 is prevented from elastically deforming with respect to the front end connected to the contact portion 16b as a reference, and the leg portion 18 is prevented from being further immersed in the shaft cylinder 11. Therefore, unnecessary elastic deformation of the elastic piece 17 after the locking protrusion 21 is released from the rear end of the long hole 11a is prevented, and the reference for elastic deformation of the clip 19 is the support protrusion 26 from the front end of the elastic piece 17. Changed to Then, as shown in FIG. 9, the clip 19 is then elastically deformed by the support protrusion 26 around the leg portion 18 whose entry into the shaft cylinder 11 is prohibited, and the front end of the clip 19 is restored by the restoring force. Is pressed against the surface of the shaft tube 11. That is, when the reference is changed, the distance from the reference to the front end of the clip 19 is shortened, thereby effectively avoiding a decrease in the elastic force with which the front end of the clip 19 presses the surface of the shaft cylinder 11. it can. Therefore, by forming such a support protrusion 26, unnecessary elastic deformation of the elastic piece 17 thereafter can be prevented without using the spring 5 shown in FIG. It is possible to effectively ensure the force for holding the cloth such as the pocket together with the tube 11.

  Further, as shown in FIG. 10, the support protrusions 26 may be formed on the elastic piece 17 or the connecting portion 16c so as to be bent by elasticity. In the knock-type writing instrument 10 having such a support protrusion 26, as shown in FIG. 11, the support protrusion 26 is connected to the connecting portion in a state where the locking protrusion 21 is released from the rear end of the long hole 11a as described above. It abuts against 16c or the elastic piece 17 and prevents the leg portion 18 from being further immersed into the shaft cylinder 11. Then, as shown in FIG. 12, the clip 19 is then elastically deformed with reference to the support protrusion 26. However, since the support protrusion 26 is inclined, the support protrusion 26 is bent by elasticity and elastic pieces. 17 and the connection part 16c are slightly shortened, and when the clip 19 is elastically deformed, the force applied to the base part of the clip 19 and the leg part 18 and the supporting projection 26 is absorbed by the elasticity. Thereby, it can avoid that an excessive load is added to the base part of the clip 19 and the leg part 18, and its support protrusion 26. FIG. Here, FIG. 10 shows a case where the inclined support protrusion 26 is formed on the connecting portion 16c. However, although not shown, the support protrusion 26 may be formed on the elastic piece 17 to be bent by elasticity.

It is sectional drawing which shows the state which the writing part of the knock type writing instrument of this invention embodiment protruded from the front end of the axial cylinder. It is sectional drawing corresponding to FIG. 1 which shows the state in which the writing part was immersed in the axial cylinder. It is the sectional view on the AA line of FIG. It is a perspective view which shows the state by which the knock body is inserted in the rear part of a shaft cylinder. It is sectional drawing which shows the state which the rear end of the elastic piece elastically deform | transformed into the axial cylinder, and the latching to the rear end of the long hole of a latching protrusion was cancelled | released. It is sectional drawing corresponding to FIG. 5 which shows the state which the operation part was pushed and the clip rock | fluctuated. It is sectional drawing corresponding to the enlarged view of FIG. 1 in which the support protrusion was formed in the elastic piece. It is sectional drawing corresponding to FIG. 7 which shows the state which the latching protrusion was cancelled | released from the rear end of the long hole, and the support protrusion contact | abutted to the connection part. It is sectional drawing corresponding to FIG. 8 which shows the state which elastically deformed centering on the leg part, and the front-end of the clip was separated from the axial cylinder. It is sectional drawing corresponding to FIG. 7 in which the support protrusion was formed inclining. It is sectional drawing corresponding to FIG. 8 which shows the state which the elastic piece contact | abutted to the inclined support protrusion. FIG. 10 is a cross-sectional view corresponding to FIG. 9 illustrating a state in which the front end of the clip is separated from the shaft cylinder after the elastic piece comes into contact with the inclined support protrusion. It is sectional drawing which shows the conventional knock type writing instrument. It is sectional drawing corresponding to FIG. 13 which shows the state by which the latching to the locking hole of the latching protrusion of the clip front end of the conventional knock type writing instrument was cancelled | released.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Knock type writing instrument 11 Shaft cylinder 11a Long hole 11e Locking hole 11f Slit 12 Writing body 12a Writing part 14 Coil spring (elastic body)
16 knock body 16a knock portion 16b contact portion 16c connecting portion 17 elastic piece 18 leg 19 clip 21 locking projection 22 operation portion 26 support projection

Claims (9)

A shaft cylinder in which a long hole extending in the axial direction is formed, a writing body that is inserted into the shaft cylinder so that a writing portion at the front end can be projected and retracted from the front end of the shaft cylinder, and is urged backward by an elastic body, and the writing body A knock body inserted into the rear part of the shaft cylinder so that the rear part abuts the rear end and protrudes rearward from the rear end of the shaft cylinder, and a front end provided along the knock body inserted into the shaft cylinder An elastic piece that can be bent by being connected to the knock body, a leg portion that is provided in the elastic piece and is inserted in the elongated hole so as to be movable in the front-rear direction, and connected to the leg portion to be outside the shaft cylinder In the knock type writing instrument provided with a clip that is provided and elastically pressed against the outer periphery of the shaft cylinder,
A locking projection that is locked to the rear end of the elongated hole in a state where the writing portion protrudes from the shaft tube and can maintain the protruding state of the writing portion is formed at the rear end of the elastic piece,
The knocking writing instrument according to claim 1, wherein the locking projection is configured such that the locking of the rear end of the long hole is released when the rear end of the elastic piece is elastically deformed inside the shaft tube.   The knock type writing instrument according to claim 1, wherein the front end of the clip is pressed against the outer periphery of the shaft cylinder, and the leg portion is provided at an intermediate portion of the elastic piece in front of the locking projection.   The knock type writing instrument according to claim 1 or 2, wherein a locking hole into which a locking projection can enter in a state where the writing part is immersed in the shaft tube is formed in the shaft tube at the rear of the long hole.   The knock type writing instrument according to claim 3, wherein a slit is formed in the longitudinal direction in the axial tube from the rear end of the axial tube to penetrate the locking hole to reach the long hole.   The knock according to claim 3 or 4, wherein an operation part extending rearward beyond the leg part is formed at a rear part of the clip, and the operation part covers the locking hole in a state where the writing part is immersed in the shaft tube. Formula writing instrument.   The rear end of the leg portion is in contact with the rear end of the long hole in a state where the writing portion is immersed in the shaft tube, and the interval between the rear end of the leg portion and the rear surface of the locking projection, The knock type writing instrument according to any one of claims 3 to 5, wherein a distance between the rear end and the rear end of the locking hole is equal. The knock body has a knock portion whose rear portion protrudes rearward from the rear end of the shaft tube, a contact portion which is provided at a predetermined interval forward from the knock portion, and which contacts the rear end of the writing body, the knock portion and the contact portion. And a connecting part for connecting
The elastic piece is arranged in parallel with the connecting portion with a predetermined distance from the connecting portion, and the front end is connected to the contact portion,
The rear end of the leg that contacts the rear end of the elongated hole is formed so as to be inclined so as to move straight toward the shaft cylinder or toward the clip.
The knock according to claim 6, wherein the elastic body that urges the writing body rearward is configured to press the rear end of the leg portion against the rear end of the elongated hole so that the leg portion protrudes outside the shaft cylinder. Formula writing instrument. The knock body has a knock portion whose rear portion protrudes rearward from the rear end of the shaft tube, a contact portion which is provided at a predetermined interval forward from the knock portion, and which contacts the rear end of the writing body, the knock portion and the contact portion. And a connecting part for connecting
The elastic piece is arranged in parallel with the connecting portion with a predetermined distance from the connecting portion, and the front end is connected to the contact portion,
The support protrusion which contacts the connecting part or the elastic piece in a state where the locking protrusion is released from the rear end of the long hole is formed on the connecting part facing the intermediate part or the leg part of the elastic piece. The knock type writing instrument of any one of thru | or 6.   The knock type writing instrument according to claim 8, wherein the support protrusion is formed on the elastic piece or the connecting portion so as to be bent by elasticity.