JPH11321182A - Knocking type writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pocket from being stained or damaged by housing a writing utensil in the pocket while a writing medium is kept in an advanced state. SOLUTION: An engaging part 26a is formed of an engaging body 26 which is fixed to a knocking body 24 being connected to a refill 20, and at the same time, on the rear face of the opposite base end part of a clip 28, an engagement- receiving part 28b is formed, and a guide hole 12a is formed on an external cylinder 12 in a manner to correspond with the engagement-receiving part 28a, and the refill 20 is held at an advanced location by an engagement of the engaging part 26a with the engagement-receiving part 28b through the guide hole 12a. When the opposite base end part of the clip 28 is separated from the external cylinder 12 in order to use the clip 28, the engagement between the engaging part 26a and the engagement-receiving part 28b is disengaged, and the refill 20 returns to a retracted location by a spring 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knock-type writing instrument for moving a writing medium such as a ball-point pen, a mechanical pencil, a marker or the like to a forward position where the tip of the writing medium protrudes from the tip of an outer cylinder.

[0002]

2. Description of the Related Art Conventionally, a knock-type writing instrument of this type includes an outer cylinder, a writing medium inserted and accommodated in the outer cylinder so as to be movable in an axial direction, an elastic body for urging the writing medium rearward, and an outer cylinder. It has a clip whose base end is fixed to the cylinder and a knock body that is exposed outside from the outer cylinder in order to be knocked, and the writing medium retracts into the outer cylinder by operating the knock body. It is generally known that the tip of the writing medium moves from the sunken position to a forward position where the tip of the writing medium projects from the tip of the outer cylinder.

[0003]

However, in such a conventional knock-type writing instrument, if the user forgets to retract the writing medium and inserts a clip into the edge of the pocket of the clothes and stores the clip in the pocket, the writing medium cannot be used. There is a problem that a pocket may be soiled or a hole may be formed.

[0004] As a knock-type writing instrument in which such a problem is solved, there is one described in Japanese Utility Model Publication No. 5-25915 or Japanese Utility Model Publication No. 6-15735 filed by the present applicant. In the knock-type writing implements disclosed in these publications, the clip is integrated with a knock body protruding from the rear end of the outer cylinder, and a locking projection is provided on the back surface of the tip of the clip. The writing medium is held at the forward position by engaging with the locking receiving portion formed on the outer cylinder. In this knock-type writing instrument, when the tip of the clip is to be separated from the outer cylinder to insert the clip into the pocket, the engagement between the locking projection and the locking receiving portion is released, so that the writing medium is automatically retracted. , Can prevent pockets from being damaged. However, since the clip moves together with the knocking of the knocking body, it cannot be knocked while holding the clip, and has a problem that it is difficult to knock.In addition, in order to return to the retracted position, Since the two ends of the clip must be swung up and down and cannot be returned to the storage position with the knock of the knock body, the operation for moving forward and the operation for retracting are different, making it difficult to operate There is. The present invention has been made in view of such a problem, and the invention according to claims 1 to 5 has good knock operability, and automatically puts a writing medium in a retracted position when using a clip. It is an object of the present invention to provide a knock-type writing instrument that can be returned.

[0005]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 of the present invention comprises an outer cylinder, a writing medium inserted and accommodated in the outer cylinder movably in the axial direction, An elastic body that urges the writing medium backward, and a knock body that is exposed to the outside of the outer cylinder to be knocked, the writing medium is retracted into the outer cylinder by operating the knock body In a knock-type writing instrument, the tip of the writing medium moves from the retracted position to an advanced position where the tip of the writing medium projects from the tip of the outer cylinder,
A locking portion is formed on the writing medium or the engaging body that moves together with the writing medium, and a locking receiving portion is formed on the back surface of the clip opposite to the base end fixed to the outer cylinder. Guide holes are formed in the outer cylinder corresponding to the locking receiving parts,
The writing medium is held at the forward position by engaging the locking portion with the locking receiving portion through the guide hole. By operating the knocking body and moving the writing medium to the forward position against the urging force of the elastic body, the locking receiving portion and the locking portion formed at the opposite base end of the clip engage, Hold the writing medium in the advanced position. The base end of the clip is fixed to the outer cylinder and does not move with the knocking body. When operating so that the opposite end of the clip is slightly away from the outer cylinder,
Since the engagement between the locking portion and the locking receiving portion is released, the writing medium retreats by the urging force of the elastic body, and automatically moves to the retracted position.

According to a second aspect of the present invention, in the first aspect, the engaging body having the locking portion is directly fixed to the knocking body. The fixing can be performed by press fitting. Alternatively, it is also possible to form an elastically bending piece on one of the knocking body and the engaging body and fix the other by fitting the other projection into a groove formed on the outer peripheral side of this elastically bending piece. The invention according to claim 3 is:
3. The device according to claim 1, wherein the locking portion is capable of bending in an inner diameter direction. When the locking portion moves forward by the operation of the knocking body and interferes with the locking receiving portion of the clip, the locking portion bends in the inner diameter direction and passes through the locking receiving portion, thereby forming the locking receiving portion. It can move forward and engage the catch.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a cam surface (28) is provided at the rear portion of the locking receiving portion so that the height gradually decreases toward the rear.
c) is formed, and a cam surface (26c) is formed on the top of the locking portion so that the height gradually decreases toward the front.
Is formed. When the locking portion moves forward by the operation of the knocking body and interferes with the locking receiving portion of the clip, the cam surface of the rear portion of the locking receiving portion and the cam surface of the locking portion slide, so that the locking is performed. The portion can smoothly bend to the lower side of the lock receiving portion.

According to a fifth aspect of the present invention, in the third or fourth aspect, the guide hole is wider than the locking receiving portion only on one side in the lateral direction with respect to the locking receiving portion. At the rear end of the hole, a first cam surface (12b) is formed gradually toward the side where the lock receiving portion is located toward the rear, and at the front end of the guide hole, the first cam surface (12b) of the lock receiving portion is formed. A temporary receiving portion (12c) which is opened rearward is formed on the side where the locking receiving portion is located, and the locking receiving portion is gradually arranged forward toward the side opposite to the side where the locking receiving portion is located. A second cam surface (12d) is formed on the side opposite to the side where the portion is located, and a second cam surface (12d) is formed on the front portion of the locking receiving portion, the second cam surface being inclined so that the width gradually decreases toward the front. A locking recess (28e) having two cam surfaces (28d) and conforming to a part of the outer shape of the locking portion and opening forward. The temporary receiving portion (12c) of the guide hole faces the second cam surface (28d) of the locking receiving portion when viewed along the axial direction. The locking recess (28e) of the locking receiving portion faces a part of the second cam surface (12d) of the guide hole.

The operation of the knocking body advances the locking portion,
When the locking part flexes in the inner diameter direction and passes through the locking receiving part,
It is received in the temporary receiving part of the guide hole. When the operating force on the knocking body is released, the locking portion separates from the temporary receiving portion, moves to the second cam surface of the locking receiving portion facing the temporary receiving portion, and moves to the second cam surface.
The locking recess is reached along the cam surface and engaged. In this state, the refill is held at the forward position. Further, when the knocking body is operated again, the locking portion is disengaged from the locking concave portion and moves to the second cam surface of the guide hole facing the locking concave portion,
Along the second cam surface, it goes to the side opposite to the side where the locking receiving portion is located. When the operating force on the knocking body is released, the locking portion passes by the locking receiving portion and moves to the first cam surface of the guide hole, and the rearmost position of the guide hole along the first cam surface. Return to In this state, the refill is held at the retracted position.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 are longitudinal sectional views showing a first embodiment of a knock-type writing instrument according to the present invention.
The drawing shows an example in which a writing tool is applied to a ballpoint pen, and the writing medium is a refill containing ink. The knock-type writing instrument 10 includes a rear cylinder 14 and a rear cylinder 14.
And a tip 18 screwed to the tip of the tip cylinder 16, and a refill 20 as a writing medium is provided in the outer cylinder 12. It is inserted and stored movably in the direction. A spring 22, which is an elastic body, is interposed between a stepped portion 18a formed inside the tool 18 and a spring receiver 20a formed on the refill 20, and the spring 22 always attaches the refill 20 rearward. I'm going.

A knock body 24 is detachably connected to the rear end of the refill 20, and the knock body 24 projects rearward from the rear cylinder 14 and is exposed to the outside. The engagement body 26 is fixed to the inside of the tip of the knock body 24 by press-fitting, and the refill 20 passes through the center of the engagement body 26. However,
The engagement body 26 can be integrated with the knock body 24. As shown in FIG. 3, a locking portion 26a protruding in the outer diameter direction is formed on the peripheral surface of the engagement body 26, and a U-shaped hole 26b is formed so as to surround three sides of the locking portion 26a. Have been. The locking portion 26 is formed by the U-shaped hole 26b.
a can be bent radially inward. The top of the locking portion 26a is a cam surface 26c that is formed so that its height gradually decreases toward the front.

A proximal end 28a of a clip 28 is fitted to the outer peripheral rear portion of the outer cylinder 12. An engagement receiving portion 28b protruding toward the outer cylinder 12 is formed on the back surface of the clip 28 opposite to the proximal end portion. At the rear of the locking receiving portion 28b, FIG.
As shown in (a), the first cam surface 28c is formed so that the height gradually decreases toward the rear.
In addition, as shown in FIG. 4 (b), a second cam surface 28d which is inclined so that the width gradually decreases toward the front is formed at the front portion of the lock receiving portion 28b. Stop 2
A locking recess 28e that matches a part of the outer shape of 6a and opens forward is connected to the rear end of the second cam surface 28d.

A guide hole 12a is formed on the outer peripheral surface of the outer cylinder 12 (rear cylinder 14) so as to correspond to the lock receiving portion 28b.
As shown in FIG. 5, the guide hole 12a is
Only one side in the lateral direction with respect to (shown by phantom lines) is the lock receiving portion 2
8b. At the rear end of the guide hole 12a, a first cam surface 12b is formed gradually toward the side where the locking receiving portion 28b is located toward the rear. Also,
At the tip of the guide hole 12a, on the side where the locking receiving portion 28b is located,
A temporary receiving portion 12c that is opened rearward is formed, and the side where the locking receiving portion 28b is located gradually gradually toward the front side opposite to the side where the locking receiving portion 28b is located. And a second cam surface 12d directed to the opposite side in the lateral direction.
As shown in FIG. 5, when viewed along the axial direction, the guide hole 1
2a is the second cam surface 28 of the locking receiving portion 28b.
The locking recess 28e of the locking receiving portion 28b faces a part of the second cam surface 12d of the guide hole 12a. The engaging portion 26a of the engaging body 26 passes through the guide hole 12a.

The operation of the knock-type writing instrument configured as described above will be described below with reference to FIG. When not in use,
The refill 20 is biased rearward by the spring 22 and is in the retracted position completely housed in the outer cylinder 12. At this time, the locking portion 26a of the engagement body 26 is in contact with the guide hole 12a at the rearmost end of the first cam surface 12b of the guide hole 12a (FIG. 6A), and the engagement body 26, the knock body 24, and the refill are provided. 20 is prevented from moving backward any further.

Next, when the user knocks the knocking body 24 forward to use the refill 20, the locking portion 26a interferes with the locking receiving portion 28b of the clip 28, but the locking receiving portion 28b First cam surface 28c and locking portion 26a
The sliding surface comes into sliding contact with the cam surface 26c, and the locking portion 26a sneaks into the outer cylinder 12 along the first cam surface 28c by utilizing its flexibility, so that the locking portion 26a can pass through the locking receiving portion 28b. . At this time, a radial gap is set between the refill 20 and the locking portion 26a so that the locking portion 26a can be sufficiently bent. After passing through the locking receiving portion 28b, the locking portion 26a reaches the temporary receiving portion 12c of the guide hole 12a (FIG. 6B).

Next, when the user stops applying force to the knocking body 24, the knocking body 24 and the engaging body 26 including the refill 20 are moved backward by the spring 22, and
a comes into contact with the second cam surface 28d of the lock receiving portion 28b, slidably contacts the second cam surface 28d, reaches the locking concave portion 28e, and
8b (FIG. 6 (c)). As a result, the refill 20 is prohibited from retreating, and the tip of the refill 20 is held at a forward position protruding from the tip of the outer cylinder 12, so that the refill 20 is used.

When the use is completed, the user again operates the knock body 24.
When the lock is knocked, the locking portion 26a is disengaged from the locking recess 28e, moves forward, abuts the second cam surface 12d of the guide hole 12a, slides on the second cam surface 12d, and the locking receiving portion 28b is Move to the side opposite to the side where Then, when the user stops applying the force to the knock body 24, the locking portion 26a retreats beside the locking receiving portion 28b, and the first cam surface 12b
, And slides on the first cam surface 12b to return to the rearmost position. Thereby, the refill 20 returns to the retracted position and is stored in the outer cylinder 12. Base end 28a of clip 28
Is fixed to the outer cylinder 12, the clip 28 does not move with the knock of the knock body 24, and the knock operation of the knock body 24 can be performed even if the clip 28 is gripped, so that the operability is good. ing. Also, when the refill 20 is returned to the retracted position, it can be performed by knocking the knock body 24, that is, switching between the forward position and the retracted position can be performed only by knocking the knock body 24.
Operability is good.

When the knocking body 24 is moved forward to apply a force, the clip 28 is forcibly attached to the engaging portion 26a of the engaging body 26.
Of the knock body 24 while passing under the lock receiving portion 28b.
At the time of retreat without applying force, the clip 2 is attached to the locking portion 26a.
8 is moved beside the lock receiving portion 28b, so that the operation is performed smoothly without the locking portion 26a being caught in the middle. When the user forgets to store the refill 20 and puts the writing implement in a pocket or the like while the refill 20 is in the forward position, and moves the opposite base end of the clip 28 in a direction away from the outer cylinder 12, the locking receiving Since the engagement between the portion 28b and the locking portion 26a is released, the refill 20 automatically moves rearward by the urging force of the spring 22, and returns to the retracted position. Therefore, it is possible to prevent the pocket from being stained with the ink. Guide hole 12a of outer cylinder 12
Since the locking portion 26a protruding outward in the radial direction can be bent inward in the radial direction, the assembling member 26 can be pushed in from the front of the rear cylinder 14 by utilizing this flexibility even during assembly. Thus, it can be assembled in the rear cylinder 14.

FIG. 7 is a rear sectional view showing another embodiment of the knock-type writing instrument according to the present invention. The front part is the same as in FIG. 1 and is therefore omitted. Further, the same members are denoted by the same reference numerals, and description thereof will be omitted. In this example,
Instead of fixing the knock body 24 'and the engaging body 26' by press-fitting, a plurality of elastic flexible pieces 24'a are formed at the front end of the knock body 24 'and each elastic flexible piece 24'a is formed.
A groove 24'b extending in the circumferential direction is formed on the outer peripheral side of the engagement member 26 'in the groove 24'b.
6'd is fitted to fix the knock body 24 'and the engagement body 26'. When performing the fixing operation, the elastic projections 24 'are bent in the inner diameter direction while the annular projections 2' are bent.
6'd is pushed in from the front of the knock body 24 'to
Fit 4'b. The distal end of the elastic bending piece 24 ′ a serves as a receiver for receiving the rear end of the refill 20.
When the elastic bending piece 24 ′ a receives the refill 20, it cannot bend in the inner diameter direction.
The 6 'annular projection 26'd does not come off the groove 24'b. It goes without saying that the same operation and effect as in the first embodiment can be obtained also in the second embodiment.

In the above example, an example in which the writing tool is applied to a ballpoint pen has been described. However, the present invention is not limited to this. For a mechanical pencil, if a writing medium is used as a writing medium, a knocking body is operated by knocking. The same applies because the mechanism can be moved from the retracted position to the advanced position. The same applies to the marker pen, provided that the writing medium is a holder that contains ink or a felt core and holds them. Furthermore, in each of the above embodiments, the engagement body 26,
Although the locking portion 26a is provided on 26 ', the invention is not limited to this, and it is also possible to form it directly on the writing medium.
Further, in each of the above embodiments, the knock bodies 24, 2
The writing tool of the rear end knock type in which 4 ′ protrudes from the rear end of the outer cylinder 12 has been described. However, the present invention is not limited to this, and a knocking body (even if it is knocked in the radial direction,
The same applies to a so-called side-knock type writing instrument provided with a tool that knocks in the axial direction.

[0021]

As described above, claims 1 to 5
According to the described invention, since the base end of the clip is fixed to the outer cylinder, the clip does not move together with the knock of the knocking body, and the knocking operation of the knocking body can be performed even if the clip is grasped, The performance is improved. Further, as in the case of a normal knock-type writing instrument, the operability is good because the writing medium can be switched between the forward position and the retracted position only by knocking the knock body. Then, if the writing medium is in the forward position and the writing instrument is to be stored in the pocket,
At the same time as moving the opposite base end of the clip, the engagement between the locking receiving portion and the locking portion is released, so that the writing medium can return to the retracted position. Therefore, it is possible to prevent the pocket from being stained or damaged by the writing medium.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a knock-type writing instrument according to the present invention, showing a state in which a refill (writing medium) is at a forward position.

FIG. 2 is a longitudinal sectional view showing a first embodiment of a knock-type writing instrument according to the present invention, showing a state in which a refill (writing medium) is at a retracted position.

3A and 3B are views showing a knock body and an engagement body, wherein FIG. 3A is a cross-sectional view, FIG. 3B is a plan view, and FIG. 3C is a side view.

FIG. 4 is a view showing a clip, (a) is a side view,
(B) is a bottom view and (c) is an arrow view of (a).

FIG. 5 is a plan view of an outer cylinder (rear cylinder).

FIGS. 6A to 6D are explanatory views showing the operation of the guide hole and the locking portion of the outer cylinder.

FIG. 7 is a partial longitudinal sectional view illustrating a second embodiment of the knock-type writing instrument according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Knock-type writing implement 12 Outer cylinder 12a Guide hole 12b 1st cam surface 12c Temporary receiving part 12d 2nd cam surface 20 Refill (writing medium) 22 Spring (elastic body) 24, 24 'Knock body 26, 26' Engagement body 26a Stop portion 26c Cam surface 28 Clip 28a Base end 28b Lock receiving portion 28c First cam surface (cam surface) 28d Second cam surface 28e Lock recess

Claims (5)

[Claims] 1. An outer cylinder, a writing medium inserted and housed in the outer cylinder so as to be movable in an axial direction, an elastic body for urging the writing medium backward, and an outer side of the outer cylinder to be knocked. And a knocking body that is exposed to the outside. In the writing implement, a locking portion is formed on the writing medium or the engaging body that moves together with the writing medium, and a locking receiving portion is formed on the back surface of the clip opposite to the base end fixed to the outer cylinder. A guide hole is formed in the outer cylinder corresponding to the locking receiving portion,
A knock-type writing instrument, wherein the writing medium is held at the forward position by engaging the locking portion with the locking receiving portion through the guide hole. 2. The knocking writing instrument according to claim 1, wherein the engaging body having the locking portion is directly fixed to the knocking body. 3. The knock-type writing instrument according to claim 1, wherein the locking portion can be bent in an inner diameter direction. 4. A cam surface (28c) inclined at the rear of the lock receiving portion so that the height gradually decreases toward the rear.
The knock-type writing implement according to claim 3, wherein a cam surface (26c) is formed on the top of the locking portion so as to gradually decrease in height toward the front. 5. The guide hole is wider than the lock receiving portion only on one side in the lateral direction with respect to the lock receiving portion, and the rear end of the guide hole is provided with the lock receiving portion gradually toward the rear. A first cam surface (12b) is formed toward the side where the portion is located. At the tip of the guide hole, a temporary receiving portion (12c) opened rearward is provided on the side where the locking receiving portion is located. As well as being formed, on the side opposite to the side where the locking receiving portion is located, gradually as it goes forward,
A second cam surface (12d) is formed to extend in the lateral direction opposite to the side where the lock receiving portion is located, and the width of the front portion of the lock receiving portion is gradually reduced toward the front. An inclined second cam surface (28d) is formed, and a locking recess (28e) that conforms to a part of the outer shape of the locking portion and opens forward is provided with a second cam surface (28d).
When viewed along the axial direction, the temporary receiving portion (12c) of the guide hole faces the second cam surface (28d) of the locking receiving portion, and the engagement of the locking receiving portion is formed. The knock-type writing instrument according to claim 3 or 4, wherein the stop recess (28e) faces a part of the second cam surface (12d) of the guide hole.