JPH0642877Y2 - 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 device]

However, in the above-mentioned conventional example, the down hammer 2 fitted between the outer cylinder 1 and the core case 5 comes out when the rear part is removed, and the down hammer 2 must be inserted and inserted each time. There was a problem.

Further, since the wick case 5 is moved upward by the upward movement of the hammer 2 to forcibly close the chuck 19, there is a problem that the lead cannot be held reliably. Also, since the down hammer 2 vertically moves to knock the lead case 5,
When vibration is applied to the mechanical pencil while being carried and the outer cylinder 1 moves up and down, the hitting hammer 2 moves up and down and acts on the lead-out mechanism 3 in the same way as when the outer cylinder 1 is swung, which is against the intention. There was also the problem of centering.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the swing mechanical pencil of the present invention is a down stroke that is fitted between the outer cylinder 1 and the core case 5 by swinging the outer cylinder 1 as shown in FIGS. 1 and 2. In a swing type mechanical pencil in which the hammer 2 is made to act on the lead-out mechanism 3, and the lead 4 can be fed out from the tip of the outer cylinder 1, in the lead case 5 of the lead-out mechanism 3, the hitting portion 7 of the down hammer 2 and this A hook portion 8 behind the hit portion 7 is provided, and a lead case receiver 10 having a projection 9 on the inner surface is connected between the hit portion 7 and the hit portion 8 at the rear portion of the lead case 5. An engagement hole 11 is provided on a side of the lead case receiver 10, an outer cylinder side slit 12 is provided in a portion of the outer cylinder 1 facing the engagement hole 11, and an outer cylinder surrounding the outer cylinder side slit 12 is provided. An elongated hole 14 is formed in the portion 1 to allow the slider 13 to slide, and the elongated hole 14 is engaged. When the protrusion 15 of the stider 13 is fitted into the hole 11 via the outer cylinder side slit 12 and the slider 13 is slid backward, the protrusion 9 of the core case receiver 10 is attached to the hook portion 8 of the core case 5. The neck portion 12a is provided in the outer cylinder side slit 12 so that the neck portion 12a abuts and the protrusion 15 moves.

[Action]

In the swing mechanical pencil of the present invention, in order to fit the hammer 2 into the lead case 5, the hammer 2
Is inserted into the core case 5 from the rear end and pushed forward, the case side slit 6 is provided in the core case 5,
The lead case 5 bends, and this bending bends the hammer 2 down.
Rides over the contact portion 7 of the lead case 5, and when the rider gets over it, the bending of the lead case 5 is restored, and the down hammer 2 is fitted into the lead case 5.

When the down hammer 2 is fitted, the hammer 2 hits the hit portion 7 and does not come out from the rear. When removing the hammer 2, the hammer 2 is strongly pulled backward to bend the lead case 5, or the lead case 5 is pulled with a finger.
By pushing the case side slit 6 in the axial direction to bend it, the hitting hammer 2 can get over the contact portion 7 and be taken out.

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. The hitting portion 7 is tapped by the upward movement of the down hammer 2, and the protruding portion is inserted into the engaging hole 11 of the lead case receiver 10 connected to the lead case 5.
The slider 13 in which 15 is fitted has the lead case 5 slightly moved up until it is locked by the neck portion 12a of the outer cylinder side slit 12 provided in the outer cylinder 1, and as a result, the chuck 19 is moved. Since the chuck ring 18 is forcibly fitted into the chuck ring 18 and closed, the core 4 is surely chucked and the core slip during writing is prevented.

Further, when the slider 13 is moved back and forth along the outer cylinder side slit 12, the protruding portion 15 of the slider 13 is engaged with the engaging hole of the lead case receiver 10.
Since it is fitted in 11, the slider 13 is moved back and forth to push the lead case 5 of the lead-out mechanism 3 through the lead case receiver 10 through the lead case receiver 10 to push out the lead 4 from the tip of the outer cylinder 1. You can

To retract the core 4, move the slider 13 forward and slide
The lead case 5 is pushed through the lead case receiver 10 in which the projecting portion 15 of the lead 13 is fitted in the engaging hole 11, and the chuck 19 of the lead feeding mechanism 3 is maintained in the open state as in the known mechanical pencil. By pushing the tip, the core 4 can be retracted from the tip of the outer cylinder 1.

When carrying, push the slider 13 rearward to force its protrusion 15 through the neck 12a provided in the outer cylinder side slit 12,
A slider 13 is provided between the neck 12a and the rear end of the slit 12.
The slider 13 is locked when the protrusion 15 of the slider 13 is fitted, and the core case receiver 10 in which the protrusion 15 of the slider 13 is fitted in the engagement hole 11 and the core case 5 connected to the core case receiver 10 are locked by the slider 13. Since it is 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.

〔Example〕

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

FIGS. 1 (a) and 1 (b) are a longitudinal sectional front view and a side view of an embodiment of a swing type mechanical pencil of the present invention, respectively.
2 (a) and 2 (b) are a side view and a sectional view taken along the line II-II of the outer cylinder of the present invention, respectively.

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 includes a lead case 5, a chuck 19 fixed to the front part 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. It comprises a chuck ring receiving sleeve 17 that is locked, a chuck tightening spring 20 and the like that are interposed between the rear end of the sleeve 17 and the spring receiving / protruding 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 17a (see FIG. 8).

The case side slit 6 (see FIGS. 4 and 5) in the axial direction and the hitting portion 7 of the down hammer 2 (see FIGS. 4 and 5 (a)) are opposed to the rear portion of the lead case 5. A hooking portion 8 (see FIGS. 4 and 5 (b)) is provided at the rear of the hitting portion 7, and a rear portion of the lead case 5 is provided between the hitting portion 7 and the hooking portion 8. Core case receiver 10 having a protrusion 9 on the inner surface of the front portion
(See FIG. 6) are connected. The down hammer 2 is fitted in the lead case 5 between the contact portion 7 and the spring receiving / projecting portion 24.

An engagement hole 11 is provided on the side of the lead case receiver 10 (see FIG. 6), and an axial outer cylinder side slit 12 is provided in a portion of the outer cylinder 1 facing the engagement hole 11. (See Figure 2). An elongated hole 14 through which a slider 13 (see FIG. 7) can slide is formed in a portion of the outer cylinder 1 surrounding the outer cylinder side slit 12, and the engaging hole 11 is provided with the outer cylinder side slit 12 therebetween. The protruding portion 15 of the slider 13 is fitted. The outer cylinder side slit 12 is provided with a neck portion 12a that allows the protrusion 15 to move when the slider 13 is slid backward (see FIGS. 2 and 3). The protruding portion 15 of the slider 13 is fitted between the neck portion 12a of the outer cylinder side slit 12 and the rear end of the slit 12 to lock the slider 13. Reference numeral 13a is an operator provided on the upper surface of the slider 13. Further, when the slider 13 is slid backward, the projection 9 of the lead case receiver 10 contacts the hooking portion 8 of the lead case 5.

An eraser jacket 25 is fitted on the rear end of the outer cylinder 1, and an eraser 26 is attached to the eraser jacket 25. 27 is an eraser cover. A spring 16 is inserted between the rear inner step of the outer cylinder 1 and the outer step of the lead case receiver 10.

When the outer cylinder 1 is swung in the above-mentioned structure, the hammer 2 causes the projection 24 also serving as the spring and the contact portion 7 of the core case 5
Move up and down between. The chuck ring 18 is knocked on the core case 5 of the core feeding mechanism 3 by the downward movement of the hammer 2 and is locked to the front part of the chuck ring receiving sleeve 17.
Chuck that is fitted into the core and fixed to the tip of the core case 5
This knock knocks 19 against the spring force of the chuck tightening spring 20 or moves by the spring force to open and close the chuck 19, and the core 4 is paid out from the chuck 19 by a predetermined length and the tip 21 of the tip 21 of the outer cylinder 1 The core 4 can be paid out from the tip pipe 23 of the slider 22.

Since the spring force of the chuck tightening spring 20 is weakened in order to smoothly and surely move the core by the down hammer 2, the chuck 19 is moved upward when the chuck 19 is moved.
Can not be sufficiently inserted into the chuck ring 18 to be closed, and there is a risk of slippage during writing.

In the present embodiment, the hitting portion 7 is hit by the upward movement of the down hammer 2, and the lead case receiver 10 connected to the lead case 5 is provided.
The slider 13 having the protrusion 15 fitted in the engaging hole 11 of the outer cylinder 1
The core case 5 moves up a little until it is locked by the neck portion 12a of the outer cylinder side slit 12 provided in the.
Since the chuck 19 is forcibly fitted into the chuck ring 18 and closed, the core 4 is surely chucked and the core slip during writing is prevented.

Further, when the slider 13 is moved back and forth along the outer cylinder side slit 12, the protruding portion 15 of the slider 13 is engaged with the engaging hole of the lead case receiver 10.
Since it is fitted in the core 11, the core case 5 of the core feeding mechanism 3 can be pushed through the core case receiver 10 by the forward / backward movement of the slider 13, and the core 4 can be fed out from the front pipe 23 in the same manner as described above.

To retract the core 4, move the slider 13 forward and slide
The lead case 5 is pushed through the lead case receiver 10 in which the projecting portion 15 of the lead 13 is fitted in the engaging hole 11, and the chuck 19 of the lead feeding mechanism 3 is maintained in the open state as in the known mechanical pencil. By pushing the tip, the core 4 can be retracted from the tip of the outer cylinder 1.

When carrying, the slider 13 is pushed rearward against the spring 16 so that the protruding portion 15 is provided with the neck portion 12a provided in the outer cylinder side slit 12.
If the protrusion 15 of the slider 13 is fitted between the neck 12a and the rear end of the outer cylinder side slit 12 by forcibly passing through the slider 13, the slider 13 is locked and the protrusion 15 of the slider 13 is engaged with the engaging hole. Since the lead case receiver 10 fitted to 11 and the lead case 5 connected thereto are locked by the lock of the slider 13, the outer cylinder 1 moves up and down, and the down hammer 2 moves up and down. However, the centering operation by the centering-out mechanism 3 is not performed.

Further, in this embodiment, since the spring 16 is provided between the lead case receiver 10 and the rear inner step of the outer cylinder 1 as shown in the first illustration, the lead case receiver 10 does not rattle, and the eraser is erased. It goes without saying that the eraser 26 can be used to erase characters if the cover 27 is removed.

By removing the eraser cover 27 and removing the eraser jacket 25, the core 4 can be replenished from the rear end of the outer cylinder 1.

In order to fit the down hammer 2 into the core case 5, the down hammer 2 is fitted into the core case 5 from the rear end thereof and pushed forward, and the axial case side slit 6 is provided in the rear part of the core case 5. As a result, the lead case 5 bends, and the deflection causes the hitting hammer 2 to ride over the contact portion 7 of the lead case 5. When the hitting hammer 2 gets over, the bending of the lead case 5 is restored, and the hitting hammer 2 is pushed to the lead case 5. Will be fitted.

When the down hammer 2 is fitted, the hammer 2 hits the hit portion 7 and does not come out from the rear. When removing the hammer 2, the hammer 2 is strongly pulled backward to bend the lead case 5, or the lead case 5 is pulled with a finger.
By pushing and bending the case side slit 6 portion, the down hammer 2 can get over the contact portion 7 and be taken out.

[Effect of device]

As is clear from the above description, according to the swing type mechanical pencil of the present invention, since the case side slit 6 and the hitting portion 7 of the hitting hammer 2 are provided in the lead case 5, the hitting hammer is removed even if the rear part is removed. There is no risk of the hammer 2 coming out, and it is not necessary to fit the hammer 2 every time the hammer 2 comes out. An outer cylinder 1 is provided with a slider 13 in which a protrusion 15 is fitted into an engagement hole 11 of a lead case receiver 10 connected to the lead case 5 by hitting the hitting portion 7 by the upward movement of the down hammer 2. Since the lead case 5 is moved up a little until it is locked by the neck 12a of the slit 12 on the cylinder side, the chuck 19 is forcibly fitted into the chuck ring 18 and closed. Not only can it be securely chucked to prevent slippage during writing, but especially when carrying the slider 13, pushing the slider 13 rearward to project its protruding portion 15 and the neck portion 12a provided in the outer cylinder side slit 12 is impossible. If the protrusion 15 of the slider 13 is fitted between the neck 12a and the rear end of the outer cylinder side slit 12 by inserting the slider 13, the slider 13 is locked and the protrusion 15 of the slider 13
Since the lead case receiver 10 in which is fitted into the engaging hole 11 and the lead case 5 connected thereto are locked by the lock of the slider 13, the outer cylinder 1 moves up and down, and the hammer 2 is lowered. Even if it moves up and down, the centering operation by the centering-out feeding mechanism 3 is not performed.

[Brief description of drawings]

FIGS. 1 (a) and 1 (b) are a longitudinal sectional front view and a side view of an embodiment of a swing type mechanical pencil of the present invention, respectively.
2 (a) and 2 (b) are a side view and a sectional view taken along the line II-II of the outer cylinder of the present invention, and FIGS. 3 (a) and 3 (b) are IIIa-IIIa in FIG. 2 (b), respectively. Line and IIIb-IIIb line sectional view, FIG. 4 is a longitudinal sectional view of the core case in the present invention, and FIGS. 5A and 5B are respectively Va-Va line sectional view and Vb-Vb line of FIG. 6A is a vertical sectional view of the lead case receiver in the present invention, and FIG. 6A to FIG.
VIb-VIb line sectional view of FIG. 6B and VIc-VIc line sectional view of FIG. 6B, and FIGS. 7A to 7D are side view, bottom view and FIG. VIIc-VIIc line sectional view of FIG. 7A, VIId-VIId line arrow view of FIG. 7A, and FIG. 8 are front views showing an example of the chuck ring receiving sleeve in the present invention. 1 ... Outer cylinder, 2 ... Down hammer, 3 ... Core feeding mechanism, 4 ... Core, 5 ... Core case, 6 ... Case side slit, 7 ... Contact part, 8 ... Hooking part , 9 ... Protrusion, 10
...... Core case receiver, 11 ...... Engagement hole, 12 ...... Outer cylinder side slit, 12a ...... Neck portion, 13 ...... Slider, 14 ...... Oblong hole, 15
…… Projection, 16 …… Elastic body (spring).

Claims (4)

[Scope of utility model registration request] 1. A swing-type mechanical pencil capable of swinging an outer cylinder to cause a down hammer, which is fitted between the outer cylinder and a core case, to act on a lead-out mechanism so that the core is extended from the tip of the outer cylinder. In, the core case of the core feeding mechanism is provided with a hitting part of the down hammer and a hooking part behind the hitting part, and the core case has a protrusion on the inner surface between the hitting part and the hooking part. A swing type mechanical pencil that connects the core case holders that it has. 2. A swing type mechanical pencil capable of swinging the outer cylinder so that a down hammer fitted between the outer cylinder and the core case is made to act on a lead-out mechanism, and the lead is extended from the tip of the outer cylinder. In, the core case of the core feeding mechanism is provided with a hitting part of the down hammer and a hooking part behind the hitting part, and the core case has a protrusion on the inner surface between the hitting part and the hooking part. The core case receivers are connected to each other, an engaging hole is provided on the side of the core case receiver, and an outer cylinder side slit in the axial direction is provided in a portion of the outer cylinder facing the engagement hole. The utility model registration according to claim 1, wherein an elongated hole through which the slider can slide is formed in the surrounding outer cylinder, and the protrusion of the slider is fitted into the engagement hole through the slit on the outer cylinder side. Swing type mechanical pencil. 3. When the slider is slid backward, the projection of the core case receiver abuts on the hook portion of the core case, and
The swing type mechanical pencil according to claim 1, wherein a neck portion in which the protruding portion moves is provided in the slit on the outer cylinder side. 4. A swing type mechanical pencil according to claim 1, wherein an elastic body is provided between the rear portion of the outer cylinder and the core case receiver.