JP3418865B2 - Sharp pencil - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sharp pencil having a slider protruding from the tip of a barrel together with a core, and more particularly to a sharp pencil with a slider characterized by the assembly structure of the slider and the like. It is related.

[0002]

2. Description of the Related Art In a sharp pencil in which a lead is projected from a tip provided on the tip of a barrel by a knocking operation or the like, a pipe for protecting the lead is often provided on the tip. Such a pipe is formed integrally with the tip tool, a separate metal pipe is press-fitted into the tip tool to be fixedly attached, or a pipe-shaped slider is movably inserted into the tip tool. Then, it is formed mobile. Usually, this slider is provided with a core holding portion such as an elastic member for frictionally holding the core, and it moves forward together with the core so as to project from the tip tool and is retracted as the core is consumed. It is usually incorporated in the ingredient.

On the other hand, in the assembly of the sharp pencil, a lead-out mechanism or the like provided in the shaft cylinder is incorporated in the connector in advance, and this connector is attached to the shaft cylinder so that the assembling work is made efficient. The method is widely adopted. In the case of such a connector system, in order to provide the slider as described above, the connector portion is first assembled, this is inserted into the barrel, and the slider is assembled to this barrel by another assembly process. It was manufactured by screwing the front tool. As a result, the assembly process becomes complicated and the unit price for assembling becomes high. Further, since the slider is provided on the tip and the one lead-out mechanism is provided on the connector, the two are provided on separate members, so that the operation of the slider may be uncertain.

[0004]

The problems to be solved by the present invention are as follows.
In a sharp pencil having a slider, a sharp pencil having a slider can be obtained by an assembling process in which a lead-out mechanism is assembled in a connector in advance and the slider can be surely operated. Is.

[0005]

According to the present invention, a connector is formed so as to be inserted into a shaft cylinder, a core feeding mechanism is provided in the connector, and a tip portion of the connector is axially arranged. You can move and lock the movement in forward and reverse positions.
Cormorants slider - fitted to, the slider - the connector fitted with - a slider - is shut, characterized in that incorporated in the shaft within the cylinder so as to protrude from the distal end of the barrel - Pupenshiru is provided, the problems Is solved.

[0006]

1 shows an embodiment of a sharpening pencil of the present invention, in which a cylindrical connector (2) is inserted into a shaft cylinder (1), and the connector (2 ) Is provided with an appropriate lead feeding mechanism for projecting the lead (3) from the tip of the barrel. In the figure, the shaft cylinder (1)
Although the tip of each is formed in a taper shape, a tip tool may be formed as a separate body and the tip tool may be connected to the tip of the barrel by screwing, press fitting, or any other suitable connecting means. .

The lead feeding mechanism can be constructed appropriately, but in the figure, a chuck (5) is fixed to the tip of the lead tank (4) and a tightening ring (6) is attached to the chuck (5). Between the lead tank (4) and the step inside the connector so as to urge the lead tank in a direction in which the flange of the tightening ring (6) abuts on the step (7) inside the connector. A spring (8) is provided. When the lead tank (4) is advanced by knocking or the like, the chuck (5) advances while holding the lead, and when the tightening ring (6) hits the step (9) in the connector ( When the wick (5) is released and the lead (3) is sent to the forward position and the knock or the like is stopped, the chuck or the like is retracted by the action of the spring (8) and the lead is held again.

As shown in FIG. 2, the connector (2) has a front cylinder portion (11) to be inserted into a small diameter front hole (10) of the shaft cylinder (1) and a large diameter cylinder. It has a head portion (13) inserted into the rear hole (12), and is incorporated in the barrel by various configurations as described later.

As will be described later, a slider (14) is movably fitted in the front portion of the connector so as to protrude from the tip of the barrel so as to be movable in the axial direction. The slider can be fitted so that the fitting portion of the slider is located outside the front end of the connector, but in the drawing, the fitting portion (15) of the slider (14) is connected to the connector- (2) front cylinder part
It is inserted inside (11). The slider (14) has a through hole (16) through which the lead (3) is inserted, and also has a lead holding portion for frictionally holding the lead. In the figure, the lead holding portion is a sandwiching portion (17) by the elastic force of the slider itself or by the elastic force of a lead holding piece (not shown) formed so as to be expandable by providing a slit in the slider. Holds the core, but as is well known, an elastic piece (breaker) such as rubber
(Not shown) may be used.

A projection is formed on one of the slider and the connector, and a long groove extending in the axial direction is formed on the other side so that the projection is fitted therein. In the figure,
As shown in FIGS. 3A and 3B, a protrusion (18) is provided on the outer periphery of the fitting portion (15) of the slider (14), and a long groove (19) is formed in the connector (2). (Figure 2). The protrusions (18) and the long grooves (19) are appropriately provided at a plurality of places around the slider or the connector, and at two places in the figure, and preferably serve as a guide when inserting into the long grooves (19). Slopes (20), (20) are formed on both sides of the protrusion (18).

The long groove (19) has an opening (21) at the front end side of the connector (2), and the retracted position of the slider (14) (see FIG. 4).
(A)) and the forward position (FIG. 4 (B)), the engaging edges (22) and (23) with which the protrusion (18) engages are locked so as to lock the movement of the slider (14). It is provided. This locking action is disengaged at the retracted position by the advancing force when advancing the lead by the lead-out mechanism, and disengaged at the advancing position by the pressing force when pressing the tip of the slider against the paper surface. The degree.

A resistor is provided between the slider and the connector to provide frictional resistance to the movement of the slider. The resistor can be formed in various ways.For example, the width dimension of the long groove and the protrusion is determined so that both sides of the protrusion (18) can be elastically sandwiched between the groove edges of the long groove (19). Can be used as a resistor. In this case, as shown in FIG. 5, the outer diameter of the front tube portion (11) of the connector (2) is set to the front hole (10) of the shaft tube (1) in order to secure the clamping action by the groove edge of the long groove. The diameter is slightly smaller than the inner diameter of
When the connector is assembled in the barrel, there is a slight clearance.
It is advisable not to cause (24) to hinder the elastic action of the connector-tip portion in the long groove portion.

FIG. 6 shows another embodiment of the resistor. FIG. 6 (A) shows an embodiment in which a raised portion (25) is formed at the rear end of the fitting portion (15) of the slider (14) so as to be elastically pressure-bonded to the inner surface of the connector (2). FIG. 6B shows an embodiment in which the connector (2) side is provided with a raised portion (26) for elastically crimping to the slider (14). In addition, FIG.
In an embodiment in which the outer diameter of the fitting portion (15) of the slider (14) and the inner diameter of the front tubular portion (11) of the connector are set to a fitting method that produces sufficient movement resistance at the contact surface. is there.

In the slider (14), the projection (18) is pushed into the opening (21) of the long groove (19) from the tip of the connector (2) incorporating the lead-out mechanism as described above. As a result, it is attached to the connector (2) (FIG. 7). In the embodiment shown in the drawings, the stepped portion (9) against which the tightening ring (6) of the lead-out mechanism is contacted is the inner end of the elastic piece (28) formed by the substantially U-shaped slit (27). The connector- (2) in this state as shown in FIG.
Does not protrude to the inner surface of. Therefore, the slider
Before installing (14), chuck (5) of the lead-out mechanism above.
It is easy to insert the parts etc. into the connector from the tip of the connector (2). Outer end (29) of the elastic piece (28)
Is formed on the inclined surface so as to project from the outer periphery of the front cylindrical portion (11) of the connector (2), but an appropriate protrusion (not shown) may be formed.

The connector (2) to which the slider is attached as described above is inserted into the barrel from the rear end of the barrel (1) so that the slider protrudes from the tip, and withstands writing pressure. It is fixed in the barrel so as to obtain. The connector
When (2) is incorporated, the elastic piece (28) formed in the front tube portion of the connector is pushed by the inner surface of the front hole (10) of the shaft tube and pushed down in the axial radial direction to The step (9) formed at the inner end of the piece (28) projects to a position facing the front of the tightening ring (6) of the lead-out mechanism. Thus, the lead-out function can be achieved as described above.

Various configurations can be used to fix the shaft cylinder (1) and the connector (2). Configuration shown in Figure 1 connector - (2) tip (30) against Uchidan portion formed on the tip portion of the barrel (1) to (31) This of the connector - the head of the (2) (13) Locking projection so that it engages with the rear end of the head portion (13) while being in contact with the inner step portion (32) formed in the rear portion of the barrel (1).
The connector (2) is fixed by providing (33) an appropriate number or annular projections on the inner surface of the barrel (1).
In the embodiment shown in FIG. 9, the front tubular portion of the connector (2) is used.
A plurality of locking protrusions (34) are provided on the outer periphery of (11)
(34) is fixed by engaging with the inner surface of the front hole (10) of the barrel (1).

In the embodiment shown in FIG. 10, the connector-
(2) and the wick tank (4) are prevented from rotating, the connector (2) is rotated through the wick tank (4), and the head (13) of the connector (2) is rotated into the barrel (1 ) The rear hole (12) is screwed (35). In order to prevent the connector- (2) and the lead tank (4) from rotating, in FIG.
As shown in (B), the protrusion (36) is provided on the lead tank (4),
The connector (2) is provided with a long groove (37) with which the projection (36) engages, but a long groove is provided on the core tank (4) side and the projection engages with the long groove on the connector (2) side. Alternatively, the outer diameter of the lead tank and the insertion hole of the connector through which the lead tank is inserted may be formed in a modified cross section to prevent rotation.

[0018]

As described above, the present invention is formed as described above, and the lead-out mechanism is provided in the connector, and the tip of the connector is movable in the axial direction and the movement is locked at the forward and backward positions.
The slider and the slider are attached to the connector so that the slider is mounted in the barrel so that the slider projects from the tip of the barrel. Therefore, the connector and the slider are assembled in advance. , The product can be assembled by assembling the integrated one to the shaft cylinder,
The assembly process can be simplified, the cost can be obtained economically, the relationship between the movement of the slider and the lead-out mechanism can be correctly adjusted in the connector, and a sharp pencil with a slider can be obtained with high accuracy. it can.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, in which FIG. 1A is an overall sectional view, and FIG.

FIG. 2 is a front view of a connector.

FIG. 3 shows a slider, (A) is a front view and (B) is a plan view.

4A and 4B are explanatory views showing a state where a slider fitted in a connector is moved, FIG. 4A shows the slider in a retracted position, and FIG. 4B shows the slider in an advanced position. Explanatory drawing.

FIG. 5 is an explanatory view showing a state in which the connector is incorporated in the barrel.

FIG. 6 is a partial sectional front view showing an embodiment in which a resistor is provided between the slider and the connector.

FIG. 7 is a front view showing a state in which the slider and the connector are fitted together.

FIG. 8 is a sectional view of FIG.

FIG. 9 is a sectional view showing an embodiment for fixing the connector to the barrel.

FIG. 10 shows another embodiment for fixing the connector to the barrel, (A) is a partially omitted cross-sectional view, and (B) is AA of FIG.
FIG.

[Explanation of symbols]

1-axis cylinder 2 connector 14 Slider 18 protrusion 19 long groove 22,23 engagement edge 28 Elastic piece

Claims (2)

(57) [Claims] 1. A sharp pencil having a lead-out mechanism inside the barrel and having the lead projected from the tip of the barrel by the lead-out mechanism, the connector being formed so as to be inserted into the barrel. Then, the lead-out mechanism is provided in the connector, and a slider is fitted to the tip of the connector so as to be movable in the axial direction .
A shaft is formed so that a protrusion is formed on one side and the protrusion is fitted on the other side.
A long groove extending in the direction is formed, and the above-mentioned slits are provided at both end positions of the long groove.
Engagement with which the protrusion engages to lock the movement of the rider.
The connector having a toe edge and the slider attached thereto
A sharp pencil, wherein a slider is incorporated in the barrel so that the slider projects from the tip of the barrel. 2. A frictional resistance against the movement of the slider.
The resistor to be applied is provided between the slider and the connector.
It is to have claim 1 according to Shah - Pupenshiru.