JP2001293995A - Ball-point pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ball-point pen which makes it possible to project an ink core from a case of a ball-point pen tip part and to house it therein by gripping the pen in the state of the use or by removing the grip. SOLUTION: A slider 13 is fitted integrally to an ink tube 10 of the ink core 9. Slant parts 15 and 16 are formed in the slider. A knock button 25 is fitted and bent so that it is movable in the direction intersecting the longitudinal direction of the case perpendicularly substantially, and a coil spring 31 is provided to actuate the slider toward the initial position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ballpoint pens, and more particularly, to ballpoint pens configured such that an extruded ink wick is automatically retracted after use.

[0002]

2. Description of the Related Art A ballpoint pen is frequently used as a writing instrument, in which a knock button is pushed to push out an ink core, the ink core is used in that state, and after use, the knock button is pushed again to draw in the ink core. There are types. This type usually does not have a cap. Therefore, if the user forgets to retract the ink core, the ink core remains pushed out, and in this state, the ink core is often stored in a pocket of clothes, and the clothes are often soiled.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. An ink core is projected by holding a ball-point pen in use, and the state of holding the ball-point pen after use is released. Accordingly, it is an object of the present invention to provide a ballpoint pen capable of automatically retracting an ink core.

[0004]

[Means for Solving the Problems]

In order to solve the above-mentioned problems, a ball-point pen according to the present invention is provided with a push-moving member provided so as to be relatively movable with respect to a case, and integrally moved with an ink core received in the case. Attach the slide member as possible,
A force transmitting means interposed between the pushing member and the sliding member, for transmitting a force from the pushing member to the sliding member and moving the same,
There is further provided an urging means for urging the slide member or the pressing member toward a predetermined initial position.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 and 2 are side views of the ballpoint pen 1 according to the first embodiment, in which a part of the case 3 is cut away. FIG. 1 shows a state where the ink core 9 is drawn into the case 3. The case 3 is configured by combining upper and lower two parts, a case upper 5 and a case lower 7, and the inside is hollow.

Reference numeral 9 denotes an ink core, similar to the ink core used in a conventional ball-point pen, which includes an ink cylinder 10 into which ink is injected and a tip or ball-point tip 11 attached to the tip. It is configured. The ball-point pen tip 11 is inserted into and supported by a pen shaft hole 3 a formed through the tip of the case 3. Rear end 10a of ink cylinder 10
Is a guide hole 3 which is a blind hole formed at the rear of the case 3.
b and is supported and guided.

Reference numeral 13 denotes a slider, and the ink cylinder 10
Attached to. 3A and 3B are diagrams showing details of the slider 13, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG.
Is a right side view. The slider 13 is provided with first and second inclined surface portions 15 and 16 formed on a rod having a substantially rectangular cross section on both sides of a central portion 14 located at a substantially central portion in a longitudinal direction thereof and inclined in the same direction. ing. That is, the first slope 1
5 is closer to the central portion 14 in the figure (b) and descends to the right and continues to the plane portion 17, and the second slope portion 16 is away from the central portion 14 and descends to the right and continues to the plane portion 18. Then, from each of the flat portions 17 and 18, the slope portion 1
Slope separation part 1 with a section in the shape of a cross section in the direction of 5 and 16
9, 20 are formed. That is, the slopes 15, 16
Is separated into two parts by the slope separating parts 19 and 20 from the middle, and is formed into two forked parts 21a, 21b, 22a and 22b. A hole 23 is formed through the slider 13 in the longitudinal direction thereof, and the ink cylinder 10 is inserted and fixed into the hole 23. The fitting between the ink cylinder 10 and the hole 23 is tight, but the strength is such that the ink cylinder 10 comes out if a strong force is applied.

An elliptical recess 5a is formed in the upper case 5 closer to the pen shaft hole 3a than the center in the longitudinal direction, more specifically, at a position where the thumb hits when the ball-point pen 1 is gripped. A smaller oval hole 6 is formed. A knock button 25 as a pressing member is fitted and attached to the hole 6. As shown in the plan view (a), front view (b), and left side view (c) of FIG.
And a front leg 27a, 27b and a rear leg 28a, 28b extending downward from four corners of the head 6. And each leg 27a,
Small projections 29a, 29b, 30a, 30b are provided on the lower ends of 27b, 28a, 28b, respectively.

As shown in FIG. 1, the knock button 25 includes a leg 27a, 27b, 28a, 28b, and a bifurcated portion 21a, 21b of the first and second slopes 15, 16 of the slider 13, respectively. 22a and 22b.
The slider 13 is urged rightward in the figure by a compression coil spring 30 disposed between the slider 13 and a step 3c formed at the inner end of the pen shaft hole 3a of the case 3, whereby the knock button 25 is pressed. Is applied with an upward force, and the projections 29a, 29b, 30a, 30b are locked on the inner surface of the case 3 and are prevented from coming off, and are held at the illustrated position.

When the ball-point pen 1 is gripped in this state, for example, with the thumb positioned on the knock button 25, the knock button 25 is pushed into the case 3. Along with this, the slider 13 moves to the left in the figure together with the ink core 9 against the force of the spring 31 to be in the state of FIG. At this time, the tip of the ballpoint pen tip 11 protrudes from the case 3 and can be written. When the thumb is released from the knock button 25 in the state of FIG.
3 moves to the right in the figure, and returns to the state of FIG. 1 in which the ballpoint pen tip 11 is completely retracted into the case 3.

That is, when the ball-point pen of the present embodiment is gripped as if holding a normal ball-point pen, the tip of the ball-point pen tip of the ink core is protruded from the case to be in a writable state. When released, the ball-point pen tip 11 is automatically stored in the case 3 and will not be stained even if it is stored in a pocket of clothing as it is.

FIG. 5 is a cross-sectional view showing a ballpoint pen 41 according to the second embodiment. FIG. 5A shows a state in which an ink core 48 is stored in a case 43, and FIG. 2 shows a state in which the tip of the ball-point pen tip 51 is protruded.

In this embodiment, the case 43 is composed of an upper case (not shown) and a lower case 45 having a vertically symmetrical shape, and FIG.
The state which looked at the 5th side is shown. Openings 46 and 48 are formed on the left and right sides of the case 43.
Knock parts 51a, 5 of knock buttons 51, 52 rotatably supported on shafts 49, 50 erected on lower case 45.
1b is arranged facing.

Reference numeral 53 denotes an ink core, and the ink cylinder 54 is guided by being fitted between two guide plates 56 and 57 erected on the lower part 45 of the case. The ballpoint pen tip 55 at the tip is guided by fitting into the pen shaft hole 43 a of the case 43. A slider 58 is fitted in the ink cylinder 54. The knock buttons 51 and 52 and the slider 58 are integrally formed of plastic, and elastic connecting portions 59 and 6 are provided between the inner surfaces of the knock portions 51a and 52a of the knock buttons 51 and 52 and the outer peripheral portion of the slider 58.
0 is linked.

The positional relationship between the knock buttons 51 and 52 and the slider 58 in the free state is such that the knock portions 51a and 52a are apart from each other from the state shown in FIG. A peripheral rotational force acts on the knock button 52 and a counterclockwise rotational force acts on the knock button 52.
Then, positioning portions 51b, 52b of the knock buttons 51, 52 formed on the opposite sides of the knock portions 51a, 52a across the shafts 49, 50 abut against the guide plates 56, 57,
It is held at the position shown.

When the ballpoint pen 41 in the state shown in FIG. 1 is gripped, the knocking parts 51a and 52a are pushed into the case 43 in a direction approaching each other, and the state shown in FIG. I do. When the gripping is stopped or the force is reduced, the state returns to the state shown in FIG.

FIG. 6 is a view showing a ballpoint pen 71 according to the third embodiment, wherein (a) and (b) correspond to (a) and (b) of FIG. 5, respectively. This embodiment is the same as the second embodiment except that the knock button, the slider, and the connecting member are formed of different members. Therefore, the same components are denoted by the same reference numerals. The description is omitted.

The knock buttons 73 and 74 are rotatably supported by shafts 49 and 50 in the same manner as the knock buttons in the second embodiment, and the knock portions 73 a and 74 a are fitted to the openings 46 and 48 of the case 43. It is arranged facing. In addition,
As shown, the knock portions 73a and 74a are formed only of outer shells, and the inside thereof is empty.

FIG. 7 shows an ink core 75, a slider 81,
It is a perspective view of the assembly 74 with the connection member 86. The slider 81 is a plate-like member having elasticity,
Symmetrically with respect to the center, two bent portions 83a, 85a and 83b, 85b are formed on the left and right as shown in the figure. Then, the ink core 7 is inserted into the hole formed in the central portion 82.
5 is attached. Reference numeral 86 denotes a substantially W-shaped connecting member made of a material having a spring property. A central convex portion 88 corresponds to a back surface of a central portion 82 of the slider 81, and both end portions 87a and 87b are bent at the second stage. Parts 85a, 8
5b is inserted into a hole provided near the bent portion. When this is assembled to the case 43, the distal ends 88a, 88b of the connecting member 86 come into contact with the inner surfaces of the knock portions 73a, 74a. Therefore, FIG.
In the state of holding the ballpoint pen 71, knock buttons 73, 7
4 is rotated about the shafts 49 and 50, the slider 81 and the connecting member 86 are elastically deformed as shown in FIG.
Move 5 When the gripping force is reduced, the state returns to the state shown in FIG.

FIG. 8 is a side sectional view of a ballpoint pen 91 according to the fourth embodiment. In this embodiment, knock button 94 moves in the longitudinal direction of case 92 along the side of case 92. This knock button 94 is
The slider 95 and the connecting portion 96 are formed integrally with each other, and the connecting portion 96 is guided by a guide hole 92 a formed in a side portion of the case 92. Reference numeral 97 is a compression coil spring.

[0022]

As is apparent from the above description, according to the present invention, if the ballpoint pen is used for use, the ballpoint pen tip at the tip of the ink core can be projected from the case, and if the gripping force is released after use, The ballpoint pen tip is automatically stored in the case. Therefore, it is not necessary to operate the knock button only to take out and store the core. In addition, it is possible to prevent the user from forgetting to store the core in the pocket of the clothes while forgetting to store the core, thereby preventing the clothes from being stained.

Further, in the case of the present invention, a lock mechanism for holding the ink core in an extruded state is not required, and the number of parts can be reduced as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a ballpoint pen according to a first embodiment, showing a state in which a ballpoint pen tip is stored.

FIG. 2 is a partially cutaway side view similar to FIG. 1, showing a state in which a ballpoint pen tip is pushed out.

FIG. 3 is a view showing a slider, (a) is a plan view,
(B) is a front view, and (c) is a right side view.

4A and 4B are views showing a knock button, wherein FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a left side view.

FIG. 5 is a transverse sectional view showing a second embodiment,
(A) shows the state where the ballpoint pen tip is stored,
(B) shows a state where the ballpoint pen tip is pushed out.

FIGS. 6A and 6B are cross-sectional views showing a third embodiment, wherein FIG. 6A shows a state in which a ballpoint pen tip is stored, and FIG. 6B shows a state in which the ballpoint pen tip is pushed out.

FIG. 7 is a perspective view showing an assembled state of an ink core, a slider, and a connecting member.

FIG. 8 is a longitudinal sectional view showing a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ball-point pen 3 Case 9 Ink core 10 Ink cylinder 11 Ball-point pen tip 13 Slider 15, 16 Slope 25 Knock button 27, 28 Leg 31 Coil spring

Claims (4)

[Claims] 1. A ball-point pen having a case and an ink core supported in the case so as to be movable in a longitudinal direction of the case, and having a tip portion inserted into and removed from a shaft hole formed at one end of the case. , A pushing member provided to be relatively movable with respect to the case, a slide member movably attached to the ink core, and a pushing member interposed between the pushing member and the sliding member. And a force transmitting means for transmitting and moving a force from the pushing member to the slide member, and an urging means for urging the slide member or the pushing member toward a predetermined initial position. A ballpoint pen. 2. The ballpoint pen according to claim 1,
The pushing member is movable in a direction substantially perpendicular to the longitudinal direction of the case with respect to the case, and the force transmitting means is provided on the slide member so as to be inclined with respect to the longitudinal direction of the case. A ball-point pen comprising: an inclined surface provided by the user; and a leg provided at a lower portion of the pushing member and in contact with the inclined surface. 3. The ballpoint pen according to claim 1,
The pushing member is rotatably mounted around an axis provided in the case, and the force transmitting unit and the urging unit are
A ball-point pen comprising a member having a spring property disposed between the pushing member and the slide member at a position closer to the tip of the ink core than the shaft. 4. The ballpoint pen according to claim 1,
The pushing member is provided so as to be movable in the longitudinal direction of the case with respect to the case, and the pushing member, the slide member, and a connecting portion as the force transmitting means are integrally formed. And a ballpoint pen.