JPH0630478Y2 - Knock type writing instrument - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is designed to prevent the writing part of the writing body from being inserted into a pocket of clothes or the like when the writing part is projected from the tip of the shaft cylinder to stain the cloth. The present invention relates to a knock-type writing instrument provided with a safety mechanism so that the writing section is immersed in the barrel when it is inserted.

[Conventional technology]

Examples of such knock-type writing instruments that do not require a large number of parts include those disclosed in Japanese Utility Model Publication No. 61-107590 and Japanese Utility Model Publication No. 62-5986. As shown in FIG. 11 to FIG. 12, these knock-type writing instruments include a writing body 52 movably arranged in a barrel 51,
A rear end of the shaft cylinder 51 is provided with an elastic body 53 that biases the writing body 52 rearward, and a clip 55 that is arranged at a predetermined position of the writing body 52 and that has a locking projection 54 that projects outside the shaft cylinder 51. A locking portion 56 that locks the locking projection 54 is formed at a position at a distance equal to the movement amount L of the writing body 52 in the distal direction from the position of the locking projection 54 of the clip 55.
Is used to hold the writing body 52 in the locked and retracted position.

There are the following important points to note with this type of writing instrument.

(1) When the knock body 57 is pressed, the locking projection 54 of the clip 55 must be securely locked to the locking portion 56 of the shaft cylinder 51, so that the tip of the clip 55 always keeps the surface of the shaft cylinder 51. Be in a pressed state.

(2) In order to retract the writing part 59 of the writing body 52 from the tip of the barrel 51, the locking projection 54 of the clip 55 is locked to the locking part 56.
When releasing further, move the tip of the clip 55 outward.

In order to solve such a point of concern, in (1), the angle between the clip 55 and the leg portion 58 is set to be the same as the clip 55.
1 is formed smaller than the angle between the clip 55 and the leg portion 58 attached to the shaft cylinder 5, and the tip end of the clip 55 is set as a fulcrum at the base portion P between the clip 55 and the leg portion 58.
1 was pressed against the surface.

In (2), the rear end of the clip 55 is pressed toward the shaft cylinder 51 side, and the tip of the clip is separated from the shaft cylinder 51 with the base portion P as a fulcrum to lock the locking projection 54 of the clip 55. It was released from section 56.

That is, both points are solved by using the base portion P of the clip 55 and the leg portion 58 as a fulcrum, so that the base portion P is loaded, and the cursive body 52 extends from the tip of the barrel 51 to the writing body 52. If the writing section 59 is repeatedly moved in and out hundreds or thousands of times, fatigue distortion may occur at the base portion, and the clip 55 and the leg portion 58 may eventually be cut off.

Further, the knocking body 5 when the knocking body 57 is pressed in order to make the writing part 59 of the writing body 52 project from and retract into the tip of the barrel 51.
The leg portion 5 in which the rotation prevention of 7 is inserted into the long hole 60 of the shaft cylinder 51
8 part, and the leg part 58 was further loaded.

[Problems to be solved by the device]

The present invention is an improvement of the above-mentioned points, and in the knock type writing instrument of the conventional structure, in order to constantly press the tip of the clip against the surface of the barrel, the writing part of the writing body is projected from the tip of the barrel. It is to prevent an excessive load from being applied to the base portion and the leg portion due to the contact and separation of the tip of the clip with respect to the shaft cylinder at the time of performing.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention has an opening at the tip,
A writing body with a writing part is elastically inserted into the rear end side of the shaft cylinder by a spring into a shaft cylinder with a locking portion on the front end side and a slotted hole on the rear end side that are separated in the longitudinal direction. A knocking body that comes into contact with the rear end of the writing body, and a clip that has a locking projection inside that releasably locks with the locking portion of the barrel, and the rear end of the clip is outside the barrel. The knocking body is provided with a support piece that connects the elongated hole of the shaft cylinder with an elastic piece having movable legs and supports the elastic piece so as to elastically spring outward at the free end. Exposed outside the barrel, insert the legs into the slot in the barrel,
The rear end portion of the knock body is provided so as to project from the rear end of the barrel, and the writing body, the knock body, and the operating body composed of the clip are made movable so as to follow each other. A knock-type writing instrument in which the amount of separation from the locking portion is larger than the amount of immersion of the writing portion in the barrel.

Furthermore, in these knock-type writing instruments, an insertion hole is provided on the rear end side of the shaft cylinder, a protrusion that engages with the insertion hole is provided on the knock body, and the protrusion is engaged with the insertion hole. It is a knock type writing instrument.

The locking projection provided inside the clip may be provided at the tip of the clip, or may be provided at a position slightly rearward from the tip. In the latter case, if the distance between the locking projection of the clip and the locking portion of the barrel is smaller than the distance from the tip of the clip to the locking protrusion, the locking portion of the barrel is locked at the tip of the clip. There is an advantage that can be hidden.

The locking portion of the shaft cylinder is formed of a through hole or a protrusion protruding from the surface of the shaft cylinder.

[Action]

The tip of the clip is brought into and out of contact with the barrel by operating the operating body, and the locking projection of the clip is locked and unlocked in the locking part of the barrel, so that the writing part of the writing body projects from the opening at the tip of the barrel. However, at that time, the elastic piece connected to the clip always springs the rear end of the clip to the outside of the barrel to prevent excessive load from being applied to the base of the clip and the leg of the elastic piece. It always presses the tip of the shaft toward the cylinder.

The support piece provided between the elastic piece and the knock body functions to prevent the elastic piece from sagging to reduce the elastic force of the clip.

Further, by engaging the protrusion of the knock body with the hole formed in the shaft cylinder, the knock body is prevented from rotating when the operating body is operated.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

Front side or front side, rear end side or rear side of each part,
The upper side and the lower side refer to the left side, the right side, the upper side, and the lower side in the drawing, respectively.

In the first embodiment of FIG. 1-FIG. 6, the barrel 1 has an opening 1 ₂ into the opening 1 ₁ and the rear end to the tip.

The writing body 2 has a writing unit 3 at the tip.

The operating body 4 has a clip 5 and a knock body 6 integrated with each other.

The clip 5, at a location spaced from the tip to the rear, has a step portion ₇₁ facing rearwardly, is provided with a side shape protruding semicircular locking projection 7 on the inner side.

As shown in FIG. 4, the knocking body 6 has a shape in which a rear end portion thereof has a columnar shape, and a columnar contact portion 8 which comes into contact with a rear end of the writing body 2 at a tip end thereof is connected by a flat plate-like connecting portion 9. There is.
The contact portion 8 is provided with an elastic piece 12 having a bent portion 11 forming a leg portion 10 of the clip 5. Between the bent portion 11 of the elastic piece 12 and the connecting portion 9, in order to prevent the elastic force of the elastic piece 12 from decreasing, the leg portion 10 is prevented.
An elastic supporting piece 13 that elastically springs outward is made to project from the connecting portion 9 of the knock body 6, and its free end abuts against the elastic piece 12. A protrusion 14 extending in the longitudinal direction is provided on the side surface of the knock body 6 on the clip 5 side to prevent rotation when the operating body 4 is operated.

As shown in FIG. 6, a long hole 15 is formed in the rear portion of the shaft cylinder 1 so as to be slightly wider than the width of the leg portion 10 of the clip 5 and extend in the longitudinal direction. An insertion hole 16 for inserting the leg portion 10 of the elastic piece 12 into the elongated hole 15 is provided at the rear end of the elongated hole 15 and is connected to the elongated hole 15 on the extension line and the rear end is opened. The insertion hole 16 is provided with a protrusion 17 protruding inward for preventing the inserted operation body 4 from coming off. Long hole 15
On the extension line in front of, by operating the operating body 4 by knocking, a position at a distance equal to the forward distance of the writing body 3,
A locking portion 18 is provided which is a rectangular through hole into which the locking projection 7 of the clip 5 falls and locks. The locking part 1
A guide groove 19 that guides the locking projection 7 to the locking portion 18 is continuously provided at 8.

The barrel 1, the writing unit 3 in the opening 1 ₁ side of the shaft tube 1,
The cursive body 2 is inserted by spring 20 to the rear end side of the barrel 1. At the rear end of the barrel 1, a clip 5 is attached to the barrel 1.
It is exposed to the outside, the leg portion 10 is inserted into the elongated hole 15 of the shaft cylinder 1, the protruding portion 14 of the knock body 6 is engaged with the insertion hole 16 of the shaft cylinder 1,
The contact portion 8 of the knock body 6 is brought into contact with the rear end of the writing body 2, and the operating body 4 is arranged.

The total length of the clip 5 is determined by the tip portion of the clip 5 at the tip of the clip 5 when the operating body 4 is inserted into the barrel 1.
Has a length capable of being covered, and the locking portion 18 of the barrel 1 is covered with the tip portion of the clip 5.

In the positional relationship between the locking projection 7 and the barrel 1 of the locking portion 18 of the clip 5, spacing amount L ₁ of the end portion 18 ₁ of the step portion ₇₁ and the locking portion 18 of the locking projection 7, writing The length L of the portion 3 is larger than the amount L ₂ of immersion in the barrel 1, and the length of the elongated hole 15 of the barrel 1 in the longitudinal direction is larger than the distance L ₁ .

The distal end of the clip 5 is in a state in which the elastic piece 12 is bent by inserting the operating body 4 into the barrel 1 and is pressed toward the barrel 1.

Next, the operation of this embodiment will be described. When the knock body 6 of the operating body 4 is pressed, the writing body 2 advances in the barrel 1, the writing portion 3 projects from the tip of the barrel 1, and the clip 5 engages. Stop projection 7
There drop the engaging portion 18 is guided by the guide groove 19 of the shaft tube 1, and collides with the step portion ₇₁ of the locking projection 7 on the end portion 18 ₁ of the locking portion 18 locked to the locking portion 18 Then, the writing portion 2 is held in a state of protruding from the tip of the barrel 1 (see FIG. 2).

Next, when the rear end portion a of the clip 5 is pressed in the direction of the arrow, the tip of the clip 5 is lifted upward and the locking projection 7
The engagement with the engagement portion 16 is released, and the writing body 2 and the operating body 4 are returned to their original positions by the spring 20 springing.

7 to 10 show another embodiment, in which the same parts as those in the above-mentioned embodiment are designated by the same reference numerals.

As for the components different from the above-mentioned embodiment, as shown in FIG. 9, the writing body 3 is moved forward by the knocking operation of the operating body 4 in front of the elongated hole 15 on the same line as the elongated hole 15 of the barrel 1 '. In place of the locking portion 18, it projects outwardly for locking the locking projection 7'of the clip 5 and is gradually separated from the surface of the barrel 1 toward the rear end. Slope 21 ₁
And two locking portions 21 which are parallel and spaced apart and which lock the step portion 7 ₁ ′ of the locking projection 7 ′.

'Spacing amount L ₁ of the end portion 21 ₂ of the engaging portion _21' and 'stepped portion _71' of the locking projection 7 barrel 1 of the clip 5, immersion amount of the barrel 1 'of the writing unit 3 It is larger than L ₂ ′, and the longitudinal length of the long hole 15 of the shaft cylinder 1 ′ is larger than the distance L ₁ ′.

The operation of this embodiment will be described. The knocking body 6 of the operating body 4 is described.
When is pressed, the writing body 2 advances in the barrel 1'and the writing portion 3
Projecting from the tip of the barrel 1'and the locking projection 7'of the clip
Moves over the locking portion 21 by moving on the inclined surface 21 ₁ of the locking portion 21, and abuts the step portion 7 ₁ ′ of the locking projection 7 ′ with the end portion 21 ₂ of the locking portion 21 to form the locking projection. 7'is locked to the locking portion 21, and the writing portion 3 is kept in a state of protruding from the tip of the barrel 1 '(see FIG. 8).

Next, when the rear end portion (b) of the clip 5 is pressed in the direction of the arrow, the locking projection 7'where the tip of the clip 5 rises upward is released from the locking to the locking portion 21, and the spring 20 repels the writing body. 2 and the operating body 4 return to their original positions.

[Effect of device]

In a knock-type writing instrument having a structure in which the writing portion of the writing body is projected and retracted from the tip of the barrel by locking or releasing the locking protrusion provided on the clip to the locking portion formed on the barrel,
Since the present invention has the structure as described above, the load is not applied to the base portion of the clip and the leg portion. There is no need to disconnect.

Also, when the operating body is operated, the rotation of the operating body is prevented by the protruding part provided on the knock body, so the load is not applied to the leg part of the clip. Is not fatigued, cracked or cut.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a knock-type writing instrument showing a state in which a writing portion of an embodiment of the present invention is immersed in a barrel, FIG. 2 is a vertical sectional view showing a protruding state of the writing portion, and FIG. I-I in FIG.
FIG. 4 is a side view of the operating body in the same embodiment, FIG. 5 is a perspective view of the locking projection of the clip in the same embodiment, and FIG. 6 is a barrel in the same embodiment. FIG. 7 is a perspective view of a knock-type writing instrument showing a state in which the writing part of another embodiment is immersed in the barrel, and FIG. 8 is a side view showing the protruding state of the writing part. FIG. 9 is a perspective view of a part of the barrel in the same embodiment, FIG. 10 is a perspective view of the locking projection of the clip in the same embodiment, and FIG. 11 is a barrel of the writing part of a conventional knock-type writing instrument. FIG. 12 is a vertical sectional view showing a state in which the writing portion is projected, and FIG. 1, 1 '... barrel, 2 ... writing section, 3 ... cursive body, 4 ...
… Operator, 5 …… Clip, 6 …… Knock, 7,7 ′
...... Locking protrusions, 10 ...... Legs, 12 ...... Elastic pieces, 13 ......
... Supporting piece, 14 ... Projection, 15 ... Oval hole, 16 ... Insertion hole, 18 ... Locking part, 20 ... Spring, 21 ...
Locking part.

Claims (2)

[Scope of utility model registration request] 1. An opening (1 ₁ , 1 ₁ ′) is provided at the front end, a locking portion (18, 21) is provided at the front end side, spaced apart in the longitudinal direction, and an elongated hole (15) is provided at the rear end side. A writing body (2) having a writing portion (3) is elastically inserted into the rear end side of the barrel (1, 1 ') by a spring (20) in the barrel (1, 1'), A knocking body (6) that comes into contact with the rear end of the writing body (2) and a locking projection (7, 7 ') that is detachably locked to the locking portion (18, 21) of the barrel (1, 1'). ) Inside, and a rear end portion of the clip (5) at the barrel (1,
1 ') is repulsed to the outside, and the elongated hole (1
5) Elastic piece (12) having a leg part (10) capable of moving
The knock piece (6) is provided with a support piece (13) that is connected to the elastic piece (12) so that the elastic piece (12) is elastically bulged outward at the free end, and the clip (5) is attached to the barrel (1, 1). ′) Exposed outside,
The leg portion (10) is inserted into the elongated hole (15) of the barrel (1, 1 '), and the rear end of the knock body (6) is provided so as to protrude from the rear end of the barrel (1, 1'). The writing body (2), the knocking body (6), and the operating body (4) consisting of the clip (5) are made to be able to move following each other, and the locking projections (7, 7 ') of the clip (5) are made. And the shaft cylinder (1,
1 ') distance from the locking portion (18, 21) (L ₁ ,
A knock-type writing instrument in which L ₁ ′) is larger than the immersion amount (L ₂ , L ₂ ′) in the barrel (1, ₁ ′) of the writing part (3). 2. An insertion hole (16) is provided on the rear end side of the barrel (1, 1 '), and a protrusion (14) engaging with the insertion hole (16) is provided on the knock body (6). The protrusion (1
The knocking writing instrument according to claim 1, wherein 4) is engaged with the insertion hole (16).