JPH0617587Y2 - Swing type mechanical pencil - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a swing type mechanical pencil in which a down hammer is caused to act on a lead-out mechanism by swinging an outer cylinder, and the lead can be extended from the tip of the outer cylinder. Regarding

[Conventional technology]

The conventional swing type mechanical pencil will be described with reference to FIG. 1. When the outer cylinder 1 is swung, the hammer 2 is axially reciprocated (moved up and down) to move the lead case 3 of the lead delivery mechanism 3. Is knocked on, and the chuck 19 fitted into the chuck ring 18 locked to the front part of the chuck ring receiving sleeve 17 and fixed to the tip end of the lead case 5 resists the spring force of the chuck tightening spring 20 by this knock or Move by the spring force to open and close the chuck 19,
The core 4 can be paid out by a predetermined length from the chuck 19, and the core 4 can be paid out from the tip pipe 23 of the slider 22 in the tip portion of the tip 21 of the outer cylinder 1.

In addition, the lead case 5 can be pushed out by the rear end knock to let out the lead as described above.
By pressing to keep the chuck 19 open and pushing the tip of the lead, the lead 4 can be retracted into the tip 21 together with the tip pipe 23.

[Problems to be solved by the invention]

However, in the above conventional example, the down hammer 2
Since the core case 5 is knocked by the up and down movement of the core case 5, it is necessary to provide the outer surface of the core case 5 with a locking portion for restricting the upward movement of the hammer 2 in addition to the projection 24 which also serves as a receiving portion of the spring 20. Needless to say, when vibration is applied to the mechanical pencil during carrying, and the outer cylinder 1 moves up and down, centering is performed as in the case where the outer cylinder 1 is swung.

[Means for solving problems]

In order to solve the above problems, the swing type mechanical pencil of the present invention swings the outer cylinder 1 as shown in FIGS. 1 and 2 to cause the hammer 2 to act on the lead-out mechanism 3 and In a swing type mechanical pencil capable of feeding the lead 4 from the tip of the lead 1, a lead case receiver 6 is connected to a rear end portion of the lead case 5 of the lead feeding mechanism 3, and an engaging hole is formed on a side of the lead case receiver 6. 7 is provided,
An axial slit 8 is provided in a portion of the outer cylinder 1 facing the engaging hole 7, and an elongated hole 10 through which a slider 9 can slide is formed in a portion of the outer cylinder 1 surrounding the slit 8 and the engaging hole is formed. 7
The protruding portion 11 of the slider 9 is fitted to the slit 8 through the slit 8, and the neck 8 is provided in the slit 8 so that the protruding portion 11 can be moved when the slider 9 is slid backward. When the neck 11 is fitted between the neck 12 and the rear end of the slit 8, the protrusion 26 provided on the inner surface of the lead case receiver 6 and the hooking portion 27 provided on the outer surface of the lead case 5 are pressed against each other. It is configured as follows.

[Action]

When the outer cylinder 1 is swung, the hammer 2 moves up and down to act on the lead-out mechanism 3, and the lead case 5 is knocked so that the lead 4 can be fed out from the tip of the outer barrel 1. In this case, the projecting portion 11 of the slider 9 is fitted into the engaging hole 7 of the lead case receiver 6 connected to the lead case 5, and the slider 9 is engaged with the neck 12 of the slit 8 provided in the outer cylinder 1. Since it is stopped, the upward movement of the hammer 2 is restricted.

When the slider 9 is moved back and forth along the slit 8,
Since the protruding portion 11 of the slider 9 is fitted in the engaging hole 7 of the lead case receiver 6, the lead of the lead delivery mechanism 3 is moved through the lead case receiver 6 by the forward / backward movement of the slider 9 similarly to a known mechanical pencil. Press the case 5 and push the core 4 from the tip of the outer cylinder 1.
Can be paid out.

In order to retract the lead 4, the slider 9 is moved forward and the lead case 5 is pushed through the lead case receiver 6 in which the protruding portion 11 of the slider 9 is fitted in the engagement hole 7, and the lead is inserted in the same manner as a known shoe pencil. By keeping the chuck 19 of the feeding mechanism 3 open and pushing the tip of the lead, the lead 4 can be retracted from the tip of the outer cylinder 1.

When carrying the slider 9, the slider 9 is pushed backward so that the protrusion 11 thereof is forced to pass through the neck 12 provided in the slit 8
If the protrusion 11 of the slider 9 is fitted between 12 and the rear end of the slit 8, the slider 9 is locked, and the protrusion 11 of the slider 9 is fitted into the engagement hole 7 Since the protrusion 26 and the hook portion 27 on the outer surface of the lead case 5 connected thereto are pressed into contact with each other and locked, even if the outer cylinder 1 moves up and down and the down hammer 2 moves up and down, the lead is sent out. The centering operation by the mechanism 3 is not performed.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of a swing type mechanical pencil of the present invention, FIG. 2 is a side view showing an example of an outer cylinder of the present invention, and FIG. 3 is an example of a lead case receiver of the present invention. It is a side view shown.

In FIG. 1, 1 is an outer cylinder, 21 is a tip tool screwed to the outer tube 1, and 22 is a slider fitted on the tip side of the tip tool 21 and having a tip pipe 23 protruding and retracting. Reference numeral 3 denotes a lead-out mechanism that is inserted into the outer cylinder 1, and is for feeding out the lead 4 from the tip pipe 23.

The lead-out mechanism 3 is provided with a lead case 5, a chuck 19 fixed to the front portion of the lead case 5, a chuck ring 18 fitted in the chuck 19, and a tip 21 abutted on the rear end of the chuck ring 18. The chuck ring receiving sleeve 17 is locked, and the chuck tightening spring 20 is inserted between the rear end of the sleeve 17 and the spring receiving / projecting portion 24 of the core case 5. The front side and the rear side of the chuck ring receiving sleeve 17 are connected by a cushion portion (not shown).

6 is a lead case receiver, which is a protrusion 26 provided on the inner surface of the front part thereof.
The hook case 27 provided on the outer surface of the rear portion of the lead case 5 connects the lead case receiver 6 to the lead case 5 so as to be movable in the axial direction. An engagement hole 7 is provided on the side of the lead case receiver 6 (see FIG. 3), and an axial slit 8 is provided in a portion of the outer cylinder 1 facing the engagement hole 7. The down hammer 2 has a core case receiver 6 and a spring receiver protrusion 24.
It is fitted in the lead case 5 between and.

An elongated hole 10 through which a slider 9 can slide is formed in a portion of the outer cylinder 1 surrounding the slit 8, and a protruding portion 11 of the slider 9 is fitted into the engagement hole 7 via the slit 8. .
The slit 8 is provided with a neck 12 which allows the protrusion 11 to move when the slider 9 is slid backward (see FIG. 2). The slider 9 is fitted between the neck portion 12 of the slit 8 and the rear end of the slit 8 to lock the slider 9. Reference numeral 28 is an operator provided on the upper surface of the slider 9.

An eraser pedestal 15 is screwed to the rear portion of the outer cylinder 1, and a spring 16 is provided between the eraser pedestal 15 and the core case receiver 6. Denoted at 25 is an eraser held on the eraser base 15, and 29 is a cap.

When the outer cylinder 1 is swung in the above structure, the hammer 2 moves up and down between the spring receiving projection 24 and the core case receiving 6. A chuck fixed to the tip of the lead case 5 by knocking down the lead case 5 of the lead feeding mechanism 3 by the downward movement of the down hammer 2 and being fitted into the chuck ring 18 locked to the front part of the chuck ring receiving sleeve 17. This knock knocks 19 against or counteracts the spring force of the chuck tightening spring 20 to open and close the chuck 19, and the core 4 is fed out from the chuck 19 by a predetermined length, and the tip of the tip 21 of the tip 21 of the outer cylinder 1 is removed. Core 4 from the tip pipe 23 of the slider 22
Can be paid out.

In this case, the projecting portion 11 of the slider 9 is fitted into the engaging hole 7 of the lead case receiver 6 connected to the lead case 5, and the slider 9 is engaged with the neck 12 of the slit 8 provided in the outer cylinder 1. Since it is stopped, the upward movement of the hammer 2 is restricted.

When the slider 9 is moved back and forth along the slit 8,
Since the protruding portion 11 of the slider 9 is fitted in the engaging hole 7 of the lead case receiver 6, the forward / backward movement of the slider 9 pushes the lead case 5 of the lead delivery mechanism 3 through the lead case receiver 6,
The core 4 can be paid out from the front pipe 23 in the same manner as described above.

In order to retract the lead 4, the slider 9 is moved forward and the lead case 5 is pushed through the lead case receiver 6 in which the protruding portion 11 of the slider 9 is fitted in the engaging hole 7, and the lead is inserted in the same manner as a known mechanical pencil. By keeping the chuck 19 of the feeding mechanism 3 open and pushing the tip of the lead, the lead 4 can be retracted from the tip of the outer cylinder 1.

When carrying the slider 9, the slider 9 is pushed backward to force the protrusion 11 thereof to pass through the neck 12 provided in the slit 8, and the protrusion 11 of the slider 9 is inserted between the neck 12 and the rear end of the slit 8.
When the slider 9 is fitted, the slider 9 is locked, and the protrusion 26 on the inner surface of the core case receiver 6 in which the protruding portion 11 of the slider 9 is fitted into the engagement hole 7 and the hook portion 27 on the outer surface of the core case 5 connected thereto.
Since they are pressed against each other and locked, even if the outer cylinder 1 moves up and down and the down hammer 2 moves up and down, the centering operation by the center sending-out mechanism 3 is not performed.

Further, in this embodiment, since the spring 16 is provided between the lead case receiver 6 and the eraser support 15 as shown in the first illustration, the lead case receiver 6 does not rattle and the cap 29 can be removed. It goes without saying that eraser 25 can be used to erase characters.

FIG. 4 is a side view showing another example of the lead case receiver according to the present invention. In this example, an opening slit 14 reaching the end face via a neck 13 is provided at the rear of the engagement hole 7 of the lead case receiver 6. Therefore, when the tip 21 is unscrewed and the tip 21 is pulled, the tip 21 and the lead-out mechanism 3 attached to the tip 21 without damaging the protruding portion 11 of the slider 9 from the open slit 14. Not only can the core case receiver 6 connected to the core case 5 of the mechanism 3 be taken out, but also the slider 9
Since the protruding portion 11 can be fitted into the engaging hole 7 through the open slit 14 and the neck portion 13, the protruding portion 11 can be fitted into the engaging hole 7 more easily.

[Effect of device]

As is apparent from the above description, according to the present invention, the upward movement of the hammer 2 can be restricted by the lead case receiver 6, and it is not necessary to separately provide a locking portion. By pushing backwards and pushing the protruding part 11 through the neck 12 provided in the slit 8 forcibly.
If the protrusion 11 of the slider 9 is fitted between the rear end of the slit 8 and the rear end of the slit 8, the slider 9 is locked, and the protrusion of the slider 9 is fitted into the engaging hole 7
Since 26 and the hook portion 27 on the outer surface of the lead case 5 connected thereto are pressed and locked, even if the outer cylinder 1 moves up and down and the down hammer 2 moves up and down, the lead feeding mechanism. The centering operation by 3 is not performed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a swing type mechanical pencil of the present invention, FIG. 2 is a side view showing an example of an outer cylinder of the present invention, and FIG. 3 is an example of a lead case receiver of the present invention. FIG. 4 is a side view showing another example of the lead case receiver in the present invention. 1 ... Outer cylinder, 2 ... Down hammer, 3 ... Lead feeding mechanism, 4 ... Lead, 5 ... Lead case, 6 ... Lead case receiver, 7 ... Engagement hole, 8 ... Slit, 9: Slider,
10 …… elongated hole, 11 …… protruding part, 12 …… neck part, 13 …… neck part, 14 …… open slit, 15 …… eraser pedestal, 16 …… elastic body (spring).

Claims (3)

[Scope of utility model registration request] 1. A swing type mechanical pencil in which a down hammer is caused to act on a lead-out mechanism by swinging the outer cylinder so that the lead can be fed out from the tip of the outer barrel, in the rear end portion of the lead case of the lead-out mechanism. The core case receiver is connected to, and an engaging hole is provided on the side of the core case receiver.
A slit in the axial direction is provided in the portion of the outer cylinder facing the engagement hole, and an elongated hole in which the slider can slide is formed in the portion of the outer cylinder surrounding the slit, and the slit of the slider is inserted in the engagement hole. When the protrusion is fitted and the slider is slid backward, the slit is provided with a neck that allows the protrusion to move, and the slider is fitted between the neck and the rear end of the slit. A swing type mechanical pencil in which a projection provided on the inner surface of the core case and a hooking portion provided on the outer surface of the core case are pressed into contact with each other when they are inserted. 2. An opening slit is provided at the rear of the engagement hole of the lead case receiver to reach the end face through the neck, and the protrusion of the slider is fitted into the engagement hole through the neck and the neck. A swing type mechanical pencil according to claim 1, wherein the utility model is registered. 3. A utility model registration claim in which an eraser cradle is attached to the rear portion of the outer cylinder, and an elastic body is provided between the eraser cradle and the core case receiver. Swing-type mechanical pencil described in Crab.