JPS6316550Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a knock-type sharp pencil having a cap, more specifically, when the cap body is fixed to the front part of the body of the knob-type sharp pencil, the lead gripping means grips the lead. This relates to a lock-type mechanical pencil that releases .

In the past, various devices have been known in which the lead gripping means is moved forward relative to the lead and placed in a released state in order to prevent the lead from breaking at the lead gripping means due to vibrations, shocks, etc. when carried. There were problems such as complications.

Therefore, in order to release the lead gripping means during carrying with a simple structure, the inventor of the present invention proposed a tip member attached to the tip of the barrel that controls the lead gripping means without moving the lead gripping means forward. As a result of various studies based on the idea that it would be better to move the pencil backwards, we found that the practical effects disclosed in, for example, Japanese Utility Model Publication No. 50-24846, namely, the ability to protect the tip of the main body of the sharpening pencil, and the ability to make it portable. We have improved the cap, which has practical effects such as being convenient and allowing you to easily draw out the lead in the same way as a regular mechanical pencil by attaching it to the rear of the main body of the pencil. He discovered that it could be combined with a sharp pencil, and finally completed the invention. That is, the present invention has a barrel and a resilient member having sufficient elasticity to hold the lead during writing within the tip of the barrel, which is biased and arranged in the forward direction, and has a lead-carrying member inside. a sliding body having;
A sharp pencil main body comprising a lead gripping means whose front part is disposed on the sliding body and urged in a backward direction by an elastic member, and a lead storage cylinder connected to the rear of the lead gripping means: It consists of a cap body which has a through hole in the head and an engaging part on the inner surface, and a cap body in which a pressing body is slidably arranged inside the cap barrel, and the cap body is attached to the rear of the sharp pencil. When the cap body is fixed, the rear part of the pressing body protrudes from the cap barrel, allowing the lead to be drawn out, and the sticking force when the cap body is fixed to the front part of the sharp pencil is used to urge the sliding body in the forward direction. By making the elastic force larger than the elastic force of the elastic member and fixing the cap body to the front part of the sharp pencil body, the sliding body is retracted by the engaging part in the cap barrel, and the lead gripping means is released. This paper focuses on a knock-type mechanical pencil.

The present invention will be described in detail below with reference to the accompanying drawings.

Reference numeral 1 is the main body of a knock-type mechanical pencil, and the main body 1 includes a barrel 2, a sliding body 3,
The lead gripping means 4, the lead storage cylinder 5 connected to the rear of the lead gripping means 4, and the sliding body 3 in the forward direction,
It also includes a resilient member 6 that urges the lead gripping means 4 in the backward direction, but to be more specific, there is a resilient member 6 on the inner surface of the tip end of the shaft tube 2 to prevent the sliding member 3 from slipping out forward. In order to prevent this, the stepped portion 7 is also provided with annular recesses 2a and 2b at the cap body fixing position, which will be described later.
However, an end member 2c is further provided at the rear end, and the sliding body 3 includes a core protection pipe 8 having an inner diameter larger than the outer diameter of the core L at its tip, and a core at the rear of the core protection pipe 8. A lead-carrying member 9 that is in contact with the outer periphery of the lead L and elastically holds the lead L is attached, and a coil spring or the like is provided between the rear end of the sliding body 3 and the lead storage tube 5, so that the lead L is held in place when writing. (By urging the lead gripping means 4 backward, which will be described in detail later, the lead L is held, but the elastic force is stronger than this lead holding force.) The member 6 is stretched, and is urged in the forward direction so that a protrusion 10 provided on the outer surface of the rear end comes into contact with the step 7 of the shaft tube 2. Furthermore, a recess 11 is formed on the inner surface of the sliding body 3, and a tightening ring 12 is slidably disposed within the recess 11.

The lead gripping means 4 is composed of a collect chuck or the like, and its front part is disposed within the sliding body 3 and cooperates with the tightening ring 12 to feed out the lead L. Although the lead storage cylinder 5 is connected by other suitable means, the lead gripping means 4 and the lead storage cylinder 5 can also be connected through a suitable relay member. This core storage tube 5
Although the eraser 13 is attached to the holder via the attachment member 12a, the attachment member 12a and the eraser 13 can also be removed. Such a lead gripping means 4 is placed so as to be biased in the backward direction by the elastic member 6. Note that 14 is a stopper for positioning the lead gripping means 4.

Reference numeral 15 denotes a cap main body consisting of a cap barrel 16 and a pressing body 17. An engaging portion 19 is provided which engages with the sliding body 3 when fastened to the
Further, the pressing body 17 is provided with a collar 20 on its outer surface, and an elastic member 21 made of a coil spring or the like is stretched between the collar 20 and the inner surface of the head of the cap barrel 16. The pressing body 17 is moved to the cap barrel 16 by
Although the pushing body 17 is biased inward, any appropriate means such as a magnet may be used as the biasing means for the pressing body 17. It is not necessary as long as you ignore the rattling caused by vibrations when you carry it in a fixed place. still,
The annular recess 2 of the shaft tube 2 is formed on the inner surface of the tip of the cap tube 16.
Although an annular bulge 22 is formed for fitting and fixing to the sharpening pencil body 1, the fixing force to the front part of the sharp pencil body 1 is stronger than the elastic force of the elastic member 6.

Therefore, when the cap body 15 is fixed to the rear part of the sharp pencil body 1, the rear part of the pressing body 17 protrudes from the cap barrel 16, and by pressing the rear end of the pressing body 17, the lead can be fed out.

FIG. 2 shows the state in which the cap body 15 is fixed to the front part of the sharp pencil body 1. The engaging portion 19 causes the sliding body 3 to retreat against the elastic force of the elastic member 6, and due to this retreat, the tightening ring 1
2 also retreats and is released from cooperation with the lead gripping means 4, so that the lead gripping means 4 expands outward to release the lead L, and the released lead L is held at the end of the pressing body 17. The cap body 15 is pressed flush with the lead protection pipe 8 and the attachment of the cap body 15 to the front part of the sharp pencil body 1 is completed. Incidentally, when the cap body 15 is fastened, the end of the pressing body 17 may not come into contact with the core L.

FIG. 3 is a vertical cross-sectional view of a main part showing another embodiment, and in this embodiment, when the cap body 15 is fixed to the sharp pencil body, the lead protection pipe 8 and the tip of the lead L are flush with each other. In order to cause the lead L to protrude a certain length from the lead protection pipe 8 without doing anything, and to bring it into the writing state immediately after detaching the cap body 15, the pressing body 1 is used.
7 has a hole 17a bored therein.

As mentioned above, if the present invention is used only with the sharp pencil body or with the cap body attached to the rear of the sharp pencil body,
The lead can be drawn out by pressing the eraser or the pressing body, and since the elastic force of the elastic member is sufficient to hold the lead during writing, the sliding body and the lead retreat during writing. Stable writing is possible without any vibrations.Furthermore, by attaching the cap body to the front part of the sharp pencil body when carrying the pencil, the grip of the lead by the lead gripping means can be released, which prevents vibrations. This has practical effects such as being able to prevent breakage of the core due to impact as much as possible.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a longitudinal sectional view of the cap body fixed to the rear of the sharp pencil body, and Fig. 2 is a longitudinal sectional view of the cap body fixed to the front part of the sharp pencil body. FIG. 3 is a longitudinal sectional view of a main part of another embodiment, showing a state in which the cap body is fixed to the front part of the sharp pencil body. 1: Sharp pencil main body, 2: Shaft cylinder, 3: Sliding body, 4: Lead gripping means, 5: Lead storage cylinder, 6: Resilient member, 9: Lead entraining member, 15: Cap main body, 1
6: cap barrel, 17: pressing body, 18: through hole, 19: engaging portion, 21: elastic member.

Claims (1)

[Scope of utility model registration request] a barrel; a sliding body biased in the forward direction by an elastic member having sufficient elasticity to hold a writing lead within the tip of the barrel, and having a lead-carrying member therein; A sharp pencil main body consisting of a lead gripping means whose front part is disposed on a sliding body and urged in a backward direction by an elastic member, and a lead storage tube connected to the rear of the lead gripping means: a head; It consists of a cap body in which a pressing body is slidably arranged in a cap barrel having a through hole in the part and an engaging part in the inner surface,
When the cap body is fixed to the rear part of the sharp pencil, the rear part of the pressing body protrudes from the cap barrel, making it possible to extend the lead, and when the cap body is fixed to the front part of the sharp pencil, the fixing force is reduced. A sliding body that engages with an engaging portion in a cap barrel by making the elastic force greater than that of an elastic member that urges the sliding body in the forward direction and fixing the cap body to the front part of the sharp pencil body. The lock-type sharp pencil is configured such that the engaging portion is moved backward relative to the lead gripping means, and the lead gripping means is expanded to release the lead L.