JP2003025790A - Retractable writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To peculiarly constitute a knocking means of a refill so as to have a high elaborateness in a retractable writing instrument. SOLUTION: The retractable writing instrument comprises a barrel, a refill slidably contained in the barrel, an elastic member for energizing the refill in a retracting direction, and a seesaw type knock lever interlocked with the refill and having an intermediate section pivotally supported to a rear end side of the barrel. In this instrument, the refill is advanced against the energizing force of the member at the time of pressing one end side of the lever, the distal end of the refill is projected from the distal end of the barrel, locked, and the refill is unlocked at the time of pressing other end of the lever, and retracted in the barrel by the energizing force of the member.

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 with a focus on the refill knock system.

[0002]

2. Description of the Related Art A knock type ballpoint pen, which is one of conventional knock type writing instruments, has a single cylindrical outer cylinder, a refill slidably inserted in the outer cylinder, and a refill in the backward direction. And a knock cap that is inserted into the rear end side of the outer cylinder to knock the rear end of the refill. Here, the knock cap simply moves the refill linearly back and forth in the axial direction by a rear end knock operation.

[0003]

Since the conventional knock type writing instrument is constructed as described above, the rear end knock system of the refill is made up of a knock cap that simply moves the refill forward and backward in the axial direction. Therefore, there is a problem in that the overall design of the knock-type writing instrument and the knock operation are basically in the old state, and the taste is poor.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a knock-type writing instrument rich in taste by using a seesaw structure as the knocking means of the refill.

Further, according to the present invention, even in a knock type writing instrument having a composite writing instrument structure having two refills, the two refills can be alternately projected and retracted smoothly by the seesaw type knocking means. The purpose is to obtain a knock-type writing instrument that can be used.

Another object of the present invention is to obtain a knock-type writing instrument which can be provided as a character product.

A further object of the present invention is to provide a knock-type writing instrument having an outer cylinder structure in which the refill and its related parts can be easily assembled.

[0008]

A knock type writing instrument according to the present invention comprises an outer cylinder, a refill slidably accommodated in the outer cylinder, and an elastic member for urging the refill in a backward direction. A seesaw type knock lever in which the refill is interlocked by pivotally supporting an intermediate portion on the rear end side of the outer cylinder,
When the one end of the knock lever is pressed, the refill is moved forward against the biasing force of the elastic member so that the tip of the refill projects and locks from the tip of the outer cylinder, and when the other end of the knock lever is pressed, the refill is locked. It is configured such that it is released and is moved backward into the outer cylinder by the urging force of the elastic member.

The knock-type writing instrument according to the present invention comprises an outer cylinder, two refills slidably accommodated in the outer cylinder, and elastic members for individually biasing the refills in the backward direction. A seesaw-type knock lever that pivotally supports the outer cylinder on the rear end side and interlocks both the refills with each other, and one refill resists the biasing force of the elastic member when the knock lever is tilted at one end side. And forwardly move the tip of the refill to project and lock from the tip of the outer cylinder, and when one end of the knock lever is pushed and tilted, the one refill is unlocked and moved backward into the outer cylinder by the urging force of the elastic member. At the same time, the other refill is moved forward against the urging force of the elastic member so that the tip of the refill projects and locks from the tip of the outer cylinder, and both refills are released at the tilt release position of the knock lever. To those constructed as Shisabotsu is held within the outer tube.

The knock-type writing instrument according to the present invention is one in which a character-shaped hieroglyphic object is integrally provided on the knock lever.

In the knock type writing instrument according to the present invention, a cam lever that extends in the axial direction of the refill and rotates integrally with the knock lever is provided at an intermediate pivotal support portion of the knock lever with respect to the outer cylinder, and after the refill. A cam having an inclined surface which is constantly in pressure contact with the side surface of the cam lever by the urging force of the elastic member is fitted to the end.

The knock-type writing instrument according to the present invention is constructed so that a pair of half-divided outer cylinder members, which are divided into two along the axial direction of the refill, are united and combined to assemble the outer cylinder.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below. Embodiment 1. 1 (a) is an external front view showing a knock type writing instrument according to Embodiment 1 of the present invention, FIG. 1 (b) is a side view of FIG. 1 (a), and FIG. 1 (c) is of FIG. 1 (a). Bottom view,
FIG. 2 is an explanatory diagram of the internal configuration of FIG. In the figure, 1 is an outer cylinder of a ballpoint pen which is one of knock-type writing instruments, 2 and 3 are two refills slidably accommodated in the outer cylinder 1, and 4 and 5 are those refills 2 and 3. Elastic member (coil spring) that biases the
7 is a cam provided at the rear end of the refills 2 and 3,
Reference numeral 8 denotes a seesaw-type knock lever having an intermediate portion pivotally supported inside the rear end side of the outer cylinder 1 and capable of swinging in the vertical direction. The knock lever 8 has both ends outwardly on both sides of the outer cylinder 1. It extends, and hieroglyphic objects 9 and 10 in the shape of a character are integrally mounted on the outward extending portion. 11
Is a cam lever provided at the intermediate pivot portion of the knock lever 8, and the cam lever 11 can engage with the cams 6 and 7 alternately.

More specifically, the outer cylinder 1 is composed of a pair of half-divided outer cylinder members 12 and 13 having a concave sectional shape divided into two along the longitudinal direction thereof. The detailed configurations of 12 and 13 are shown in FIGS. 3 and 4.
FIG. 3 is an exploded cross-sectional view of FIG. 1 (b), and FIGS. 4 (a) and 4 (b) are views of the left and right half-divided outer cylinder members viewed from the inside.

In FIGS. 3 and 4, 14a and 15a are provided.
Are a plurality of refill guide portions provided inside one half outer cylinder member 12.
a and 15a are a tip-side refill guide portion 14a, which is formed by notching in the inner partition wall 14 near the tip of the half-divided outer tubular member 12, and an intermediate partition wall portion 15 in the half-divided outer tubular member 12. Notched middle refill guide portion 15
It consists of a and. Reference numerals 16 and 17 denote left and right cam guide grooves provided on the inner wall surface portion of the one half outer cylinder member 12 and parallel to each other. These cam guide grooves 16 and 17 are formed on the inner wall surface portion of the half outer cylinder member 12. It is composed of an integrally formed rectangular frame-shaped wall. Reference numerals 16a and 17a are front end wall portions of the cam guide grooves 16 and 17, and 16b and 17b are rear end wall portions of the cam guide grooves 16 and 17, and the front end wall portions 16a and 17a and the rear end wall portion 16b, The movement stroke of the refills 2 and 3 is between 17b.

Reference numeral 18 denotes a lever mounting shaft integrally provided on the center of the inner wall surface near the rear end of the half-divided outer cylinder member 12, and reference numeral 19a denotes notches formed on both side walls of the rear half-divided outer cylinder member 12. Reference numerals 20a and 21a denote pen-arc feeding holes formed in a tip end wall portion of the half-divided outer cylindrical member 12, and 22 are fitting portions formed integrally with both side walls of the half-divided outer cylindrical member 12 so as to integrally project. The mating protrusions 23 are front and rear screw boss portions integrally formed on the inner wall surface of the half outer cylindrical member 12.

The above is the configuration of one half-divided outer cylinder member 12. Next, with respect to the other half-divided outer cylinder member 13 paired with the half-divided outer cylinder member 12, the one half-divided outer cylinder member 12 is described. The corresponding relationship with each of the components will be described. The other half outer cylinder member 1
3 is a cutout portion 19b corresponding to the cutout portion 19a of the one half outer cylinder member 12, and the pen delivery holes 20a, 21a.
To the pen guide holes 20b and 21b having a semi-arcuate shape, the screw insertion hole 24 corresponding to the screw boss portion 23, the fitting hole 25 corresponding to the fitting protrusion 22, and the cam guide grooves 16 and 17. The corresponding cam guide grooves 26, 27 and the shaft fitting hole 28 corresponding to the lever mounting shaft 18 are provided. Further, a refill pressing portion 29 is integrally formed on the substantially middle portion of the inner wall of the other half outer cylinder member 13. In addition, 26a and 27a are front end wall portions of the cam guide grooves 26 and 27, and 26b and 27b are rear end wall portions of the cam guide grooves 26 and 27.

Next, the structure of the cams 6, 7 fitted to the rear ends of the refills 2, 3 will be described. Figure 2
In FIG. 3 and FIG. 3, 6a and 7a are cam surfaces formed on the rear portions of the cams 6 and 7, respectively, and these cam surfaces 6a and 7a are symmetrical positions in the outer cylinder 1 as shown in FIG. Is formed of an inclined surface forming a substantially V-shaped groove. 6b, 6c and 7b, 7c are integrally formed on both side surfaces of the cams 6, 7 to form a half-divided outer cylinder member 1.
The engaging projections are slidably fitted into and engaged with the cam guide grooves 16, 17 and 26, 27 of Nos. 2 and 13.
The cams 6 and 7 have the same shape, and their cam surfaces 6
The a and 7a are assembled and set in the outer cylinder 1 in a state of facing each other, and in the set state, they have a bilaterally symmetrical shape.

Next, a related structure between the knock lever 8 and the cam lever 11 will be described. FIG. 5 is an exploded perspective view of the knock lever 8 and the cam lever 11 in FIG. In FIG. 5, reference numeral 8a is a lever fitting recess integrally formed in the intermediate portion of the knock lever 8, and this recess 8a is for fitting the cam lever 8 into engagement and is formed in a front inverted U shape. Reference numeral 8b denotes a back wall of the recess 8a, and the back wall 8b has a lever mounting shaft 18 for the half-split outer tubular member 12.
A shaft hole 8c (see FIG. 3) for fitting and supporting is provided. Cam lever 1 to be fitted and engaged in the recess 8a
1, tapered taper surfaces 11a and 11b having a sharp shape are formed from the substantially middle portion thereof toward the tip side. A shaft hole for communicating with the shaft hole 8c is provided on the base end side of the cam lever 11.

Next, the assembly will be described. First,
Refill guide portion 14a of one half outer cylinder member 12,
While fitting the refills 2 and 3 into 15a, the engagement protrusions 6b and 7b on one side of the cams 6 and 7 at the rear ends of the refills 2 and 3 are slidably fitted and fitted into the respective refills 2 and 3. While contracting the coil springs 4, 5 whose one ends are brought into contact with the cams 6, 7, the other ends of the coil springs 4, 5 are brought into abutment engagement with the intermediate partition wall portion 15 of the half-divided outer cylindrical member 12. .

Then, the base end portion of the cam lever 11 is fitted into the intermediate recessed portion 8a of the knock lever 8, and the shaft holes 8c,
11c is rotatably fitted into the lever mounting shaft 18 of the half outer cylinder member 12 so that the tip end side (tapered surface 11a, 11b) of the cam lever 11 is cam surface 6a, 7a of the cam 6, 7.
It is set to the state of FIG. After the setting, the one half outer cylinder member 12 is covered with the other half outer cylinder member 13. In this case, by fitting the other fitting hole 25 to the fitting protrusion 22 of the one half outer cylinder member 12, the other half outer cylinder member 13 is inserted into the other half outer cylinder member 12. Correctly positioned, both are temporarily fixed,
Also, the cam guide grooves 26, 2 of the other half outer cylinder member 13
7 is fitted into the engaging protrusions 6c, 7c on the opposite side of the cams 6, 7, and the refills 2, 3 are movably pressed by the refill holding portion 29 of the other half-divided outer cylinder member 13, whereby the refills are Guides 14a, 15a
The refills 2 and 3 are prevented from falling off. In this state, the half outer cylinder members 12 and 13 are fixed to each other with screws 30 (see FIG. 3) to complete the assembly of the writing instrument.

The writing instrument thus assembled is
Notch portions 19a, 1 of the half outer cylinder members 12, 13 respectively
As shown in FIG. 1 (b), window holes 19 are formed on both sides of the rear part of the outer cylinder 1 by the 9 b, the knock lever 8 extends outward from the window holes 19, and the tip of the outer cylinder 1 has a drawing. 1
Pen delivery holes 20 and 21 are formed as shown in FIG.

Next, the operation will be described. In the state of FIG. 1 (a), when one end (leftward extension) of the knock lever 8 is pushed downward as shown in FIG. 6, the knock lever 8 and the cam lever 11 move counterclockwise about the lever mounting shaft 18. Rotate integrally in the rotating direction. At this time, in the outer cylinder 1, the cam 7 at the rear end of the refill 3 located on the side opposite to the push-down side of the knock lever 8 is pushed down by the tip portion of the cam lever 11 slidingly contacting the cam surface 7a thereof. The refill 3 moves forward against the coil spring 5 and the pen tip is extended from the pen delivery hole 21 at the tip of the outer cylinder 1. At the extended position, the tip of the cam lever 11 rides on the rear end of the cam 7 and engages. By doing so, the refill 3 is locked and ready for writing.

Therefore, when the opposite side of the knock lever 8 is pushed down, the refill 2 on the side opposite to the refill 3 moves forward against the coil spring 4 and the pen tip is extended from the tip of the outer cylinder 1. Further, when the knock lever 8 is rotationally displaced in the horizontal direction shown in FIG. 4, the refill 2 or 3 having the pen tip protruding from the tip of the outer cylinder 1 moves backward by the elastic force of the coil spring 4 or 5. Outer cylinder 1
The pen tip goes down inside.

By alternately pushing down and knocking one end and the other end of the knock lever 8 in this way, the two refills 2 and 3 can be alternately moved forward and backward, and at the forward position, the cams 6 and 7 are moved. Engaging protrusions 6b, 6c and 7 of
The front ends of b and 7c are cam guide grooves 16, 17 and 26,
The rear ends of the engagement protrusions 6b, 6c and 7b, 7c of the cams 6, 7 are in contact with the front end wall portions 16a, 17a and 26a, 27a of the cam 27, and the rear ends of the cams 6, 7 are cam guides. The grooves 16, 17 and 26, 27 are in abutting engagement with the rear end wall portions 16b, 17b and 26b, 27b.

Although the ballpoint pen has been described in the first embodiment, the writing instrument according to the present invention is also applicable to a mechanical pencil, and two refills 2, 3 are used.
It is also possible to use one for a ballpoint pen and the other for a mechanical pen. Further, the writing instrument according to the present invention may have only one refill, and even in this case, the projecting / withdrawing of the one refill can be performed by the seesaw-type knock lever. is there.

[0027]

As described above, according to the present invention, a seesaw-type knock lever extending outward of the outer cylinder is provided at the rear end portion of the outer cylinder as the knocking means of the knock-type writing instrument. Since it is configured, there is an effect that an original writing instrument rich in taste can be provided.

According to the present invention, there is an effect that the two refills can be alternately projected and retracted by the seesaw type knock lever.

According to the present invention, since a hieroglyphic object in the shape of a character is integrally provided on the knock lever, it is possible to provide a knock-type writing instrument having a more original design.

According to the present invention, there is an effect that the cam mechanism which follows the seesaw-type knock lever can smoothly and surely perform the projecting and retracting operations of the refill.

According to the present invention, the outer cylinder is divided into two along the axial direction, and the half-divided outer cylinder members are detachably combined with each other. Therefore, the components of the knock-type writing instrument are assembled. Also, there is an effect that the refill can be easily replaced.

[Brief description of drawings]

1 (a) is a front view of a knock-type writing instrument according to Embodiment 1 of the present invention, FIG. 1 (b) is a side view of FIG. 1 (a), and FIG. 1 (c) is FIG. ) Is a bottom view of FIG.

FIG. 2 is an explanatory diagram of an internal configuration of FIG.

FIG. 3 is an exploded sectional view of FIG. 1 (b).

4A and 4B are views of the left and right half-divided outer cylinder members in FIG. 3 as viewed from the inside.

5 is an exploded perspective view of a knock lever and a cam lever in FIG.

FIG. 6 is an operation explanatory diagram of the knock-type writing instrument according to the first embodiment of the present invention.

[Explanation of symbols] 1 outer cylinder A few refills 4, 5 Coil spring (elastic member) 6,7 cam 8 knock lever 9,10 Hierarchical object 11 Cam lever 12, 13 Half outer cylinder member 14,15 Partition wall 14a, 15a Refill guide 16, 17, 26, 27 Cam guide groove 16a, 17a Front end wall part 16b, 17b Rear end wall 18 Lever mounting shaft 19 window holes 19a, 19b Notch 20,21 Pen delivery hole 22 Fitting protrusion 23 Screw boss 24 screw insertion hole 25 Fitting hole 28 shaft fitting hole 29 Refill retainer

Claims (5)

[Claims] 1. A knock-type writing instrument having an outer cylinder, a refill slidably accommodated in the outer cylinder, and an elastic member for urging the refill in a backward direction, the rear end of the outer cylinder. A seesaw-type knock lever in which the intermediate portion is pivotally supported and the refill is interlocked, and the refill is moved forward against the biasing force of the elastic member when the knock lever is pressed at one end side, and the refill tip is moved forward. The knock is configured so as to protrude and lock from the tip of the outer cylinder, and when the other end of the knock lever is pressed, the refill is unlocked and is moved backward into the outer cylinder by the urging force of the elastic member. Writing instrument. 2. A knock-type writing instrument comprising an outer cylinder, two refills slidably accommodated in the outer cylinder, and an elastic member for individually biasing each of the refills in a backward direction. , A seesaw-type knock lever pivotally supported on the rear end side of the outer cylinder and interlocking both the refills is provided, and one refill resists the biasing force of the elastic member when the knock lever is tilted at one end side. Forwardly, the tip of the refill is projected and locked from the tip of the outer cylinder, and when one end of the knock lever is pushed and tilted, one of the refills is unlocked and moved backward by the biasing force of the elastic member. The other refill is moved forward against the biasing force of the elastic member so that the tip of the refill projects from the tip of the outer cylinder.
A knock-type writing instrument characterized in that it is configured to be locked and both of the refills are retracted and held inside the outer cylinder at a tilt release position of the knock lever. 3. The knock-type writing instrument according to claim 1 or 2, wherein a hieroglyphic object in the shape of a character is integrally provided on the knock lever. 4. A cam lever, which extends in the axial direction of the refill and rotates integrally with the knock lever, is provided at an intermediate pivot portion of the knock lever to the outer cylinder, and a rear end of the refill is provided with an elastic member. 4. A cam having an inclined surface, which is constantly in pressure contact with the side surface of the cam lever by an urging force, is fitted to the side surface of the cam lever.
The knock-type writing instrument described in the item. 5. The outer cylinder is provided with 2 along the axial direction of the refill.
The knock-type writing instrument according to claim 1 or 2, wherein a pair of the divided half-divided outer cylinder members are detachably united with each other.