JPH0110237Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is such that a writing body with a pen tip at the front is housed in a barrel having an opening at the front end so as to be freely advanced and retracted via an appropriate feeding mechanism, and the pen tip protrudes from the opening. relates to a writing instrument configured to be locked in a retracted state, in which the pen tip protrudes from the opening when in use, and is retracted to seal the opening when not in use, preventing dust from entering the writing instrument or ink from writing. The object of the present invention is to obtain a writing instrument called a cat press, which is completely prevented from drying out.

Examples will be described below.

In FIG. 1, A is a writing instrument main body, and 1 is a barrel consisting of a front shaft a and a rear shaft b screwed together at the intermediate portion.

The shaft cylinder 1 is a cylindrical body having an opening 2 at the front end and a closed opening 3 at the rear end.The small diameter part 4 formed at the rear end is made of an elastic material such as rubber and has a bellows shape with one end closed. The opening 5' of the knob tube 5 is tightly fitted and fixed.

6 is a hemispherical rubber or plastic;
Alternatively, the cover is made of metal, and a sliding hole 8 is passed through from the center of the spherical portion 7 to the center of the rear end surface 7'.

The lid 6 is mounted in such a way that the spherical part 7 is located on the inner circumference side of the front end of a hemispherical shape that is almost the same as the lid 6 in the shaft cylinder 1, and the spherical part 7 is located on the inner circumferential side of the rear end surface 7'. The peripheral edge of the sliding hole 8 that opens in the spherical part 7 is always propelled forward by the abutted lid closing projectile 10 and tilted slightly with respect to the axis, that is, the opening 2 of the barrel 1
The opening 2 is closed and covered.

The lid-closing projectile 10 includes a cylindrical portion 14 and a cylindrical portion 1, each of which has a small diameter portion 12 whose front end is formed with a beveled end surface 11, and a large diameter portion 13 whose outer diameter is slightly smaller than the inner diameter of the front shaft a.
It is formed into a cylindrical shape made of a spring _S1 stretched in a compressed state between the rear end 14' of 4 and the front end of the rear shaft b. It is constantly firing in a slightly tilted position.

Reference numeral 15 denotes a lid-opening pressing body coaxially inserted into the lid-closing elastic body 10.

The lid-opening pressing body 15 is formed into a cylindrical shape including a small diameter part 18' whose front end is formed in a straight end face 16, and a large diameter part 18 connected to the small diameter part 18'.
The outer diameter of the small diameter portion 18' is larger than the inner diameter of the small diameter portion 17 of the elastic body 10 for closing the lid, and the outer diameter of the large diameter portion 18 is larger than the inner diameter of the large diameter portion 13 of the elastic body 10. , are each formed to have a slightly small diameter.

19 is a known feeding mechanism disclosed in Japanese Patent Publication No. 34-7181.

The feeding mechanism 19 includes an internal gear 20 protruding from the inner peripheral surface of the rear end of the rear shaft b, and a narrow diameter portion 21' protruding from the opening.
It is comprised of a top button gear 21 that is slidable in the axial direction reaching the inner end of the knob cylinder 5 and a rotary protruding member 22.

Reference numeral 23 denotes a writing device such as a water-based ballpoint pen or a marking pen, which has a pen tip 24 at the front end.

The cursive 23 is located at the inner step 25 of the lid-opening press 15.
A part of the straight end surface of the pressing body 15 is pressed against the cover body ₆ by a spring _S2 having a weaker elastic force than the spring S1, which is stretched in a slightly compressed state between the annular stepped portion 26 of the writing body 23. The tip 23' is pushed backward while being in contact with the deflected portion of the rear end surface 7', and the distal end 23' is in contact with the front end of the feeding mechanism 19, that is, the front end of the rotating projecting member 22.

Therefore, in use, when the knock cylinder 5 is knocked, the feeding mechanism 19 is activated, that is, the top button gear 21 moves forward and the rotary protruding member 22 moves forward a predetermined distance, then rotates via the internal gear 20 and releases the knock. It is locked in the forward position by the cam action, and when the knock cylinder 5 is knocked again, the rotating protruding member 2 is moved in the same manner.
After moving forward a predetermined distance, the writing body 23 is rotated through the internal gear 19, and when the lock is released, it is locked in the backward position by the cam action.
Since the rear end 23' is in contact with the front end of the rotary protruding member 22, as the writing body 23 moves forward while compressing the spring _S2 , the lid-opening pressing body 15 is moved through the spring _S2. As it moves forward, a portion of the straight end surface 16 presses the deflected portion of the rear end surface 7' of the lid body 6.

Therefore, the lid body 6 rotated within a certain range, and the sliding hole 8 was coaxially communicated with the opening 2 as shown in FIG. 2, and the pen tip 24 protruded from the opening 2 through the sliding hole 8. The rear feeding mechanism 19 is locked in the forward state, and writing can be performed in this state.

After use, if the knock cylinder 5 is clicked again, the feeding mechanism 19 will operate and the writing body 23 and the lid opening press body 1 will be activated.
5 retreats, the lid-closing bullet 10 moves forward and hits the peripheral edge of the lid 6 with the tip of the beveled end surface 11, so the lid 6 is rotated and the opening 2 is closed in a sealed state. Returning to the state shown in FIG. 1, the ink on the writing body 23 is prevented from drying and dust is prevented from entering the main body A.

Incidentally, the same effect can be achieved even if the lid-closing bullet body 10 omit the cylindrical portion 14 and only make the end surface of the spring _S1 a slope.

Further, the sliding hole 8 of the lid body 6 is formed in an inclined shape penetrating from the center of the spherical portion 7 to the non-center portion of the rear end surface 7', so that the lid is closed when in use, that is, when the opening 2 and the sliding hole 8 communicate with each other. The rear end surface 7' of the body 6 may be locked at a position inclined with respect to the axis.

In this case, it is necessary to form the front end surface of the lid-closing elastic body into a straight-cut end surface, and the front end surface of the lid-opening pressing body into a beveled end surface.

FIGS. 3 and 4 show a second embodiment.

In this embodiment, the opening 1 at the front end inside the shaft cylinder 101 is
The hemispherical lid body 106 that is pressed against the peripheral edge of the pen tip 106 has a pen tip sliding hole 108 extending from a non-center portion of the spherical portion 107 to a non-center portion of the rear end surface 107'. 1
10 is a projectile for closing the lid. The elastic body 110 is compressed between a cylindrical portion 114 whose front end is formed into a straight end face 111, a rear end 114', and an inner annular stepped portion 126 of a lid opening presser 115, which will be described later, and which is prevented from retreating. Consists of a tensioned spring _S1 . In this state, the straight cut end surface 111 is in contact with the peripheral edge of the sliding hole 103 opening in the rear end surface 107' of the lid body 1.
06 is always pushed forward, the rear end surface 107' is perpendicular to the axis, and the spherical portion 107 is pressed against the inner circumferential edge 109 of the opening 102, so that the opening 102 is closed in a sealed state.

Reference numeral 115 denotes a lid-opening pressing body which is coaxially inserted outside the lid-closing elastic body 110 and coaxially inserted into the shaft cylinder 101.

The front end of the lid-opening pressing body 115 is formed into a beveled end surface 116, and the above-mentioned inner annular step portion 126 is formed on the inside of the intermediate portion.
An outer annular step 125 is formed on the outside, and the outer annular step 125 is formed in the annular groove 1 on the inner peripheral surface of the shaft cylinder 101.
It abuts against a stopper 128 fitted in 27 to prevent it from moving backward.

In addition, a spring S ₂ is installed in a slightly compressed state between the rear end 115' and the flange 130 of the slidable writing holding rod 129 connected to the same feeding mechanism as in the first embodiment (not shown). is stretched, the retaining rod 129 is pushed rearward, and the flange 130 is attached to the front end of the rear shaft b.
It is in contact with b′.

Reference numeral 123 indicates a cursive writing body having a pen tip 124 at the front end, and the end portion 123' is connected to the holding hole 1 of the holding rod 129.
31 and is held in place.

Therefore, when in use, when the knock cylinder (not shown) is clicked, the feeding mechanism operates and the holding rod 129
As the writing body 123 moves forward, the spring S ₂ is compressed and the lid opening pressing body 11 is also compressed.
5 moves forward. At this time, the tip 116' of the beveled end surface 116 presses the peripheral edge of the rear end surface 107' of the lid 106, so that the lid 106 remains constant against the elastic force of the elastic body 110. After the sliding hole 108 communicates with the opening 102 and the lid is opened as shown in FIG. It is locked and ready for writing.

After use, when the knock cylinder (not shown) is clicked again, the feeding mechanism is activated, and the writing body 123 and the pressing body 115 are moved back, and the bullet body 110 is advanced, and the lid body 106 is rotated, so that the opening 102 is in a sealed state. is locked and returns to the state shown in Fig. 3.

Since the present invention is constructed as described above, when the lid is not in use, the rear end surface of the lid is uniformly fired by the front end surface of the cylindrical lid-closing bullet, and the spherical part is pushed against the inner periphery of the opening in the shaft cylinder. Since the lid is pressed against the lid, it is maintained in a completely sealed state, and during use, the rear end surface of the lid body is evenly pressed by the front end surface of the lid opening presser, so that it functions stably. In addition, when the lid is opened and closed, the lid is rotated within a certain range in a resilient state, so it functions easily and reliably, and has the effect of reducing failures.

If necessary, a sealing member made of an elastic material such as rubber may be employed at the front end of the shaft cylinder or at the joint between the front shaft and the rear shaft to increase the degree of sealing.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the first embodiment showing the unused state, FIG. 2 is a longitudinal sectional view of the first embodiment showing the using state, FIG. 3 is a longitudinal sectional view of the second embodiment showing the unused state, FIG. 4 A vertical sectional view of the second embodiment showing the state of use. A...Writing instrument body, 1,101...Shaft barrel, 7',
107'... Rear end surface, 2, 102... Opening, 10,
110... Bullet projector for closing the lid, 6,106... Lid body,
15,115...Lid opening press body, 7,107...
Spherical part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A cursive writing body with a pen tip at the front end is housed in a shaft cylinder having an opening at the front end so that it can move forward and backward through an appropriate feeding mechanism, and the pen tip is in a state of protruding or recessed from the opening. In a writing instrument configured to be locked in a state, a hemispherical lid body has a spherical part located on the front end side and a pen tip sliding hole that opens in the spherical part penetrated at the front end of the barrel. is attached, and the spherical part of the lid is always pressed against the inner peripheral edge of the opening at the front end of the shaft cylinder by the cylindrical lid closing elastic body that is in contact with the rear end surface of the lid. A cylindrical lid-opening pressing body that can move forward and backward presses a deflection point at the rear of the lid in conjunction with the advancement of the cursive so that the lid can be rotated within a certain range. It is disposed coaxially with the writing body and the lid-closing bullet, and is configured so that the lid rotates when the lid-opening press moves forward, and the sliding hole coaxially communicates with the opening. A writing instrument that is characterized by the fact that it is iris. (2) The writing instrument according to claim 1, wherein the lid opening pressing body is inserted into the lid closing resilient body. (3) The writing instrument according to claim 1, wherein the pressing body for opening the lid is extrapolated to the springing body for closing the lid. (4) Utility model registration claim 1, in which the front end of the lid-opening pressing body is formed into a straight cut end face, and the front end face of the lid-closing spring body is formed into a beveled end face.
Writing implements as described in Section 2, Section 2 or Section 3. (5) Utility model registration claim 1, in which the front end of the lid-opening pressing body is formed into a beveled end face, and the front end face of the lid-closing elastic body is formed into a straight-cut end face.
Writing implements as described in Section 2, Section 2 or Section 3.