CN113784847B

CN113784847B - Pen type compasses

Info

Publication number: CN113784847B
Application number: CN202080029400.9A
Authority: CN
Inventors: 关智子
Original assignee: Raymay Fujii Corp
Current assignee: Raymay Fujii Corp
Priority date: 2019-04-17
Filing date: 2020-04-13
Publication date: 2023-03-10
Anticipated expiration: 2040-04-13
Also published as: KR102652148B1; JPWO2020213565A1; CN113784847A; JP7100763B2; WO2020213565A1; KR20210150526A

Abstract

A pen-type compass is excellent in portability, facilitates operations such as storage, portability and replacement of a refill, and prevents loss of the refill and parts. The pen type compasses are provided with a needle side main body (12) and a core side main body (11), wherein a core holder (19) for accommodating a core (a refill) (31) is arranged on the inner side of one of the needle side main body (12) or the core side main body (11), a door part (34) for opening and closing the core holder (19) is formed on the surface opposite to the other main body without the core holder (19), in addition, a fixed core part (15) for holding the core and a fixed core nut (14) for fixing the fixed core part (15) are provided, a recess (17) for accommodating the fixed core part (15) and a through hole (171) extending from the recess (17) to the side surface of the core side main body (11) are formed on the inner side of the core side main body (11), the fixed core part (15) is provided with a protruding part (153), and the protruding part (153) protrudes outwards from the through hole (171) in the state of being accommodated in the recess (17) and is engaged with the fixed core nut (14).

Description

Pen type compasses

Technical Field

The present invention relates to a pen-type compass having excellent portability, and more particularly, to a pen-type compass in which operations such as storage and portability of a refill and replacement of the refill are easy, and the refill and parts are not easily lost.

Background

[ description of the Prior Art ]

Conventionally, there is a pen-shaped compass having a cap and a pen-shaped structure as a compass which is convenient to carry around.

The pen-type compass has a substantially cylindrical shape as a writing instrument when the leg of the main body is closed, and is configured to be provided with a cap for protecting the tip end portion to which the needle and the core are attached.

Since the needle and the core are not exposed by the mounting cap, the following structure is provided: the compass can be safely operated, does not scratch other articles when being stored in a pencil box, can protect the front end part of the compass and is convenient to carry.

[ correlation technique ]

Further, as conventional techniques related to compasses, there are japanese utility model registration No. 3178069 "compasses" (patent document 1), japanese utility model registration No. 3179264 "compasses" (patent document 2), and japanese utility model application laid-open No. 60-141289 "compasses in which pencil leads are visible" (patent document 3).

Patent document 1 describes a pen-type compass provided with a core feeder.

Patent document 2 describes a compasses capable of mounting a pencil with a black needle.

Patent document 3 describes a compass in which a refill can be incorporated.

Prior art documents

Patent literature

Patent document 1 Japanese Utility model registration No. 3178069

Patent document 2 Japanese Utility model registration No. 3179264

Patent document 3 Japanese Kokai Sho 60-141289

Disclosure of Invention

Problems to be solved by the invention

However, in many conventional pen-type compasses, the refill is accommodated in a small box (container) or the like that is different from the main body, and the following cases may occur: the compass is troublesome to take and move together with the compass main body, cannot be replaced immediately when needed, and in addition, has the problem of easy loss of the replaceable core.

Further, since the parts for fixing the core to the upper portion of the main body are small and the number of parts is large, there are problems that the operations for attaching and detaching the core and positioning (fixing the height) are complicated, the operation is difficult, and the parts are easily lost.

Patent documents 1 to 3 do not describe the following cases: the core replacement can be held in the main body, the shape of the part for fixing the core is changed, the number of parts is reduced, the core is easy to assemble and disassemble, and the loss of the core replacement and the part is prevented.

The present invention has been made in view of the above-mentioned actual situation, and an object of the present invention is to provide a pen-type compass which: the core can be held in the main body, the core can be replaced immediately when needed, the number of parts of the core fixed on the main body can be reduced, the operation is easy, and the loss of the replaced core and the parts is prevented.

Means for solving the problems

The present invention, which has been made to solve the problems of the conventional art, is a pen-type compass which includes a needle-side body serving as a leg portion on which a needle is provided and a core-side body serving as a leg portion on which a core is mounted, and which is formed into a substantially cylindrical pen-type shape if the needle-side body and the core-side body are closed in a matched manner, wherein a core holder for housing a core is provided inside one of the needle-side body and the core-side body, and a door portion for opening and closing the core holder is formed on a surface facing the other of the needle-side body and the core-side body.

In the pen-type compass of the present invention, the core holder is substantially capsule-shaped and is provided so as to protrude from the inside of one main body on which the core holder is provided toward the other main body on which the core holder is not provided, and a space capable of accommodating the protruding portion is formed inside the other main body.

In the pen-type compass, the door of the holder is slidably opened and closed along the circumference of the capsule-shaped cylindrical portion.

The present invention, which solves the problems of the conventional art, is a pen-type compass comprising a needle-side body serving as a leg portion on which a needle is provided and a core-side body serving as a leg portion on which a core is mounted, and having a substantially cylindrical pen shape if the needle-side body and the core-side body are closed in a matched manner, wherein the compass comprises a fixed core portion for holding a core and a core fixing nut for fixing the fixed core portion to the core-side body, a recess for accommodating the fixed core portion and a through hole extending from the recess through a side surface of the core-side body are formed inside the core-side body, and the fixed core portion comprises a protruding portion which protrudes outward from the through hole in a state of being accommodated in the recess and is engaged with the core fixing nut.

In the pen-type compass, the stationary core portion includes a slit substantially parallel to a core insertion hole into which the core is inserted.

In the pen-type compass, the recess is formed so as to be narrower toward the through hole, the centering portion is formed so as to be narrower toward the projection, the centering portion is accommodated in the recess, and in a state where the projection projects from the through hole, if the nut for centering is engaged and tightened with the projection, a side surface of a portion thicker than an end portion of the centering portion where the projection is provided is pressed against an inner wall of the recess and tightened, and the slit is closed.

In the pen-type compass, the stationary core portion and the stationary nut are formed of an elastic resin.

In the pen-type compass, a core holder for housing the core is provided inside the needle-side body, and the door portion of the core holder is housed in a space formed inside the core-side body in a state where the needle-side body and the core-side body are closed.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the invention, the following pen-shaped compasses are made: the pen-shaped pen is provided with a needle side body which is a leg part provided with a needle and a core side body which is a leg part provided with a core, and is a pen-shaped pen shape if the needle side body and the core side body are closed in a matching way, wherein, a core holder for accommodating the core is provided at the inner side of one body of the needle side body or the core side body, and a door part for opening and closing the core holder is formed on the surface opposite to the other body without the core holder.

In addition, according to the present invention, the following pen-type compasses are produced: the core holder is substantially capsule-shaped, and is provided so as to protrude from the inside of one body in which the core holder is provided toward the other body in which the core holder is not provided, and a space capable of accommodating the protruding portion is formed inside the other body, so that the following effects are obtained: the pen type pen can store a plurality of cores with larger storage volume, and can keep the pen type pen without damaging portability when the needle side main body and the core side main body are closed.

In addition, according to the present invention, the following pen-type compasses are produced: the door portion of the core holder is slidably opened and closed along the circumference of the capsule-shaped cylindrical portion, and therefore, the following effects are obtained: the opening and closing operation can be easily performed with a simple structure.

According to the present invention, a pen-type compass includes a needle-side body serving as a leg portion on which a needle is provided and a core-side body serving as a leg portion on which a core is mounted, and is a pen-type compass having a substantially cylindrical shape if the needle-side body and the core-side body are closed in a matched manner, the compass including a stationary core portion for holding a core and a core-fixing nut for fixing the stationary core portion to the core-side body, a recess for housing the stationary core portion and a through hole extending from the recess through a side surface of the core-side body are formed inside the core-side body, and the core-fixing portion includes a protrusion protruding outward from the through hole in a state of being housed in the recess and engaging with the core-fixing nut, and therefore has the following effects: when the protrusion is inserted into the through hole, the fixed core is not dropped from the main body even if the fixed core is not pressed, so that the operations such as replacement of the core and adjustment of the length can be greatly facilitated, the number of parts can be reduced, and the loss of the parts can be prevented.

In addition, according to the present invention, the following pen-type compasses are produced: since the stationary core portion includes a slit substantially parallel to the core insertion hole into which the core is inserted, the following effects are obtained: when the core fixing nut is loosened, the core can be easily moved in and out, and when the core fixing nut is closed, the slit is closed, and the core can be reliably fixed.

In addition, according to the present invention, the following pen-type compasses are produced: the recess is formed so as to narrow toward the through hole, the stationary core is formed so as to narrow toward the protrusion, the stationary core is housed in the recess, and in a state where the protrusion protrudes from the through hole, if the stationary core nut is engaged and tightened with the protrusion, a side surface of a portion thicker than an end portion of the stationary core where the protrusion is provided is pressed against an inner wall of the recess and tightened, and the slit is closed, so that the following effects are obtained: the core can be reliably fixed.

In addition, according to the present invention, the following pen-type compasses are produced: the core fixing portion and the core fixing nut are made of resin having elasticity, and therefore, the following effects are provided: the finger has good adaptability, is not easy to slide and is easy to operate.

Drawings

FIG. 1 is a perspective view showing a schematic structure of the compass.

FIG. 2 is a partial explanatory view showing a structure of a tip end portion of the present compass.

Fig. 3 is an explanatory diagram showing an inner structure of the core-side body 11.

Fig. 4 is an explanatory diagram showing an inner structure of the needle-side body 12.

Fig. 5 is an explanatory diagram showing a structure of a tip portion of the core-side body 11.

Fig. 6 is a sectional explanatory view showing a state where the centering nut is loosened.

Fig. 7 is a cross-sectional explanatory view of a state in which the centering nut is tightened.

Fig. 8 is an explanatory diagram illustrating a structure of the core holder 19.

Fig. 9 is an explanatory diagram showing a structure (1) of the scale section.

Fig. 10 is an explanatory diagram showing a structure (2) of the scale section.

Detailed Description

In order to implement the mode of the invention

Embodiments of the present invention will be described with reference to the drawings.

[ summary of embodiments ]

The present invention provides a pen-type compass (compass) comprising a needle-side body having a needle leg and a core-side body having a core leg, wherein the needle-side body and the core-side body are closed in a matched manner to form a substantially cylindrical pen-type compass, wherein a core holder for accommodating the core is provided inside one of the needle-side body and the core-side body, and a door portion for opening and closing the core holder is formed on a surface facing the other body not having the core holder, so that the substitute core can be held inside the compass body, the substitute core can be immediately replaced when necessary, and the loss of the substitute core can be prevented.

In addition, the compass has the following structure: a recess for accommodating a core fixing portion for holding a core and a through hole penetrating the side surface of the core side body from the recess to the outside are formed inside the core side body, the core fixing portion is provided with a protruding portion which is accommodated in the recess and partly protrudes outward from the through hole, and the protruding portion is engaged with a nut for core fixing to press the core fixing portion against the inner wall of the recess to fix the core, so that the core fixing portion can be configured as 1 component, the number of components can be reduced, the operation can be facilitated, and the loss of the components can be prevented.

In addition, the compass has a slit formed in the axial direction of the stationary core part, and the slit is opened to facilitate the insertion and removal of the core in a state where the stationary core nut is loosened, and is closed to fix the core in a state where the stationary core nut is tightened.

Further, in the present compass, the cross-sectional shape of the concave portion is formed so as to be tapered toward the through hole, and the cross-sectional shape of the stationary core portion is formed so as to be tapered toward the protruding portion, and the stationary core nut is tightened, whereby the core portion can be strongly estimated from the inner wall of the concave portion, the slit is closed, and the core can be reliably fixed.

[ schematic structure of pen-type compasses of embodiment: FIG. 1]

The outline of the compass will be described with reference to fig. 1. FIG. 1 is a perspective view showing a schematic structure of the compass.

As shown in fig. 1, the compass includes a main body 1 and a cap 2 covering a front end portion of the main body 1, and has a shape similar to a writing instrument such as a ballpoint pen in a state where a leg portion is closed.

The present compass is not configured to fix a mechanical pencil or a pencil to a leg portion of the main body 1, but is configured to hold a core (core type) for the compass.

The body 1 is formed of zinc die casting or the like, and includes a center portion 10, a core-side body 11, a needle-side body 12, a body connecting portion 13, and a centering nut 14.

The center 10 has a gripper at the upper end, and a centering device for fixing the gripper to the center of the compass is provided therein, and the upper ends of the cartridge-side body 11 and the needle-side body 12 are held.

The core-side body 11 is a leg portion of one of the compasses, and a core is detachably fixed to a tip thereof.

The needle side body 12 is the other leg of the compass, and a needle is provided at the tip.

The body connecting portion 13 includes a screw and a nut, and slidably fixes the core-side body 11 and the needle-side body 12 in a state where the upper end portions of the core-side body 11 and the needle-side body 12 are accommodated in the center portion 10. The nut of the body connecting portion 13 is provided on the back side in fig. 1.

The core-side body 11 and the needle-side body 12 can be opened and closed about a point connected by the body connecting portion 13.

Further, the core-side body 11 and the needle-side body 12 are opened by the centralizer at only the same angle, whereby the grip of the center portion 10 is always positioned at the center of the present compass.

The nut 14 for fixing the core has a thread groove formed therein, and engages with a protruding portion of the fixing portion as described later. The centering nut 14 is made of a POM (polyacetal) resin having elasticity and is easily handled by hand.

The cap 2 is made of polypropylene (PP), ABS (Acrylonitrile-Butadiene-Styrene) resin, or the like, and covers the tip end portion in a state where the core-side body 11 and the needle-side body 12 are in contact with each other, and is fixed so as not to be detached.

[ Structure of front end of the compasses: figure 2]

The structure of the tip portion of the present compass will be described with reference to fig. 2. FIG. 2 is a partial explanatory view showing the structure of the tip end of the compass.

As shown in FIG. 2, in the tip portion of the compass, a core 31 projects toward the tip of a core-side body 11, and a needle 32 projects toward the tip of a needle-side body 12. The core 31 is detachable for replacement when consumed, but the needle 32 is fixed to the needle-side body 12.

Then, a part of the core fixing portion 15 for fixing the core 31 protrudes from the through hole in the side surface where the core side body 11 is provided, and the core fixing nut 14 engages with the protruding part of the core fixing portion 15 to fix the core 31.

The structure of the core fixing portion 15 and the core fixing nut 14 will be described later.

Further, a recess 16 is provided in a portion where the core-side body 11 and the needle-side body 12 abut against each other, so that the both bodies can be easily operated when opened from a closed state. Specifically, the core-side body 11 is provided with a recess 16a, and the needle-side body 12 is provided with a recess 16b.

The recessed

portions

16a and 16b are also formed on the back side in fig. 2 in the same manner.

[ inner side of core-side body 11: FIG. 3]

Next, the structure of the inner side of the core-side body 11 will be described with reference to fig. 3. Fig. 3 is an explanatory diagram showing an inner structure of the core-side body 11.

As shown in fig. 3, the core-side body 11 has a hollow upper portion and a recessed portion in a lower portion thereof for accommodating the core fixing portion 15 for holding the core 31.

Although not shown in fig. 3, a through hole through which a part of the core fixing portion 15 protrudes is provided in a side surface of the core-side body 11. The through hole is formed so as to be substantially orthogonal to a surface (contact surface) that contacts the needle side body 12.

[ inside of the needle-side body 12: FIG. 4]

Next, the structure of the inside of the needle-side body 12 will be described with reference to fig. 4. Fig. 4 is an explanatory diagram showing an inner structure of the needle-side body 12.

As shown in fig. 4, a core holder 19 for housing the refill is provided inside the needle-side body 12. The core holder 19 can hold 3 to 4 replacement cores.

By providing the core holder 19, the replacement core can be taken away together with the main body, the core 31 can be replaced at any time, the replacement core and the compass main body do not need to be held by different containers, and the loss of the replacement core can be prevented.

The structure of the core holder 19 will be described later.

[ Structure of front end portion of core-side body 11: FIG. 5]

Next, the structure of the tip portion of the core-side body 11 will be described with reference to fig. 5. Fig. 5 is an explanatory diagram showing a structure of a tip portion of the core-side body 11.

As shown in fig. 5, a recess 17 for accommodating the stationary core portion 15 is formed inside the front end portion of the core-side main body 11, and further, a through hole 171 penetrating the side surface of the core-side main body 11 from the recess 17 and a core accommodating portion 172 for accommodating the core 31 held by the stationary core portion 15 are formed.

The core 31 can move up and down in the core housing 172, and the length of the core 31 (the length of the portion protruding from the core-side body) can be adjusted.

The shape of the recess 17 will be described later.

The core fixing portion 15 of the holding core 31 includes a polygonal prism main body portion having a hollow space therein for holding the core 31 and a protrusion portion fitted into the through hole 171.

The structure of the stationary core part 15 will be described later, but the surface that abuts the needle-side body 12 in the state of being housed in the recess 17 is formed flat, and a slit in the axial direction is formed in this surface. That is, the slit is disposed substantially parallel to the hole into which the core is inserted.

The structure of the compasses for attaching and detaching the core 31 and fixing and holding the same will be described with reference to fig. 6 and 7.

[ loosening of nut for centering core: FIG. 6]

First, a state where the centering nut 14 is loosened will be described with reference to fig. 6. Fig. 6 is a sectional explanatory view showing a state where the centering nut is loosened.

Fig. 6 shows a cross section of the compasses in which the portion of the core-side body 11 where the through-hole 171 is provided is cut in the lateral direction, the lower side of fig. 6 is a contact surface with the needle-side body 12, and the upper semicircular surface is a side surface of the core-side body 11.

Fig. 6 shows a cross section of a state where the core fixing portion 15 is inserted into the core-side body 11 and the core fixing nut 14 is loosened.

The core-side body 11 is formed with a recess 17 and a through hole 171 penetrating the side surface.

As shown in fig. 6, a recess 17 is formed inside the core-side body 11, and the stationary core 15 is housed in the recess 17.

The stationary core portion 15 includes a core insertion hole 151 in which the core 31 is inserted, and a slit 152 is formed from the core insertion hole 151 toward an abutment surface (lower surface in fig. 6).

When the centering nut 14 is loosened, the slit 152 is opened, and the core 31 is easily inserted and removed.

The core 31 is inserted into the core insertion hole 151 and, when penetrated, is housed in the core housing section 172 of the core-side body 11.

Further, the core fixing portion 15 includes a protrusion 153 protruding in the direction of the through hole 171 of the core side body 11 on the opposite side to the slit 152.

The protrusion 153 has a thread that engages with a thread groove of the centering nut 14.

The centering portion 15 is also formed of the same elastomer resin as the centering nut 14, and is excellent in finger adaptability and easy to handle.

In the compasses, the cross-sectional shape of the stationary core part 15 is a polygon having one side of the abutment surface, and has a narrow upper side and a wide lower side (abutment surface). That is, the width in the lateral direction becomes narrower toward the protruding portion 153, and the shape is formed to be thin.

Fig. 6 shows an example of a hexagonal shape, but a trapezoidal shape or an octagonal shape having one side of the contact surface may be used.

The recess 17 of the core-side body 11 is formed to be larger along the cross-sectional shape of the stationary core portion 15 and to be narrower toward the through-hole 171.

The through hole 171 is formed so as to penetrate the side surface from the recess 17 in a direction substantially perpendicular to the contact surface.

The protrusion 153 of the core fixing portion 15 is inserted into the through hole 171.

Conventionally, as a structure for mounting the core, there are a component for holding the core, a screw component for connecting the component to the compass body, and a nut component for fixing the component, and it is necessary to fix the core by smoothly operating the screw component and the nut component while pressing the component for holding the core so as not to fall off from the compass body.

The compass is provided with a protruding part 153 in a fixed core part 15, and a part for holding the core (a main body of the fixed core part 15) and a connecting part with the compass main body are integrated, so that if the protruding part 153 of the fixed core part 15 is inserted into a through hole 11 of a core side main body 11, the fixed core part 15 will not fall off from the main body even if the compass is not held by hands with strength, and the core can be assembled and disassembled easily.

As shown in fig. 6, in a state where the centering nut 14 is loosened, a gap is present between the centering portion 15 and the inner wall of the recess 17, and the slit 152 is also opened.

In this state, the core 31 can be attached to and detached from the core insertion hole 151, or the position (height) can be adjusted.

[ state in which the stationary core is screwed with the nut: FIG. 7]

Next, a state in which the centering nut 14 is tightened will be described with reference to fig. 7. Fig. 7 is a cross-sectional explanatory view of a state in which the centering nut is tightened.

As shown in fig. 7, if the centering nut 14 is gradually tightened, the centering nut 14 descends to contact the side surface of the core-side body 11, and if the tightening is further gradually tightened, the centering portion 15 gradually rises.

At this time, by lifting the main body of the stationary core part 15 toward one side of the through hole 171, the surface of the middle portion wider than the upper side is pressed against the inner wall of the recess 17 of the core-side main body 11.

In the example of fig. 7, 2 oblique sides of the stationary core portion 15 are pushed against the inner wall of the recess 17 and deformed by adding an inward force, and the slit 152 is closed.

Thereby, the core 31 is fixed without falling from the core insertion hole 152.

By forming the cross-sectional shapes of the stationary core portion 15 and the recess 17 so that the lateral width is narrowed toward the through hole 171, the surface of the stationary core portion 15 can be efficiently pressed against the inner wall of the recess 17, and the core 31 can be easily fixed.

[ Structure of core holder 19: FIG. 8]

Next, the structure of the core holder 19 will be described with reference to fig. 8. Fig. 8 is an explanatory diagram illustrating a structure of the core holder 19.

As shown in fig. 8, the core holder 19 is provided in a space inside the needle-side body 12 or the core-side body 11, and holds a core (refill core) 31.

Here, although an example in which the core holder 19 is provided on the needle-side body 12 is described, the basic configuration is the same also in the case of providing the core-side body 11, and the illustration and description thereof are omitted.

As shown in fig. 8, the core holder 19 is provided in a space inside the needle-side body 12 (on the side facing the core-side body 11), and includes a gate portion 34 and fixing

portions

33a and 33b for holding the gate portion 34. The core holder 19 has an overall capsule shape, and has a dimension in the longitudinal direction of about 35 to 40mm and a dimension in the width direction of about 7 to 8mm. The space for housing the core 31 has a length of about 23mm, and can house a core having a length of about 20 mm.

Further, about half (longitudinal half) of the capsule shape of the core holder 19 is housed inside the needle-side body 12, and the remaining half protrudes from the needle-side body 12 toward one of the core-side bodies 11. This makes it possible to increase the storage volume in the core holder 19 and store a plurality of replacement cores.

Further, instead of replacing the core, a needle that can be inserted into the fixed core 15 may be prepared as another component, stored in the core holder 19, and used instead of the core 31, whereby the present compass can be used as a divider.

The fixing

portions

33a and 33b are provided above and below the protruding portion, fixed inside the needle-side body 12, and hold the gate portion 34 rotatably. Specifically, grooves are provided on the lower surface of the fixing portion 33a and the upper surface of the fixing portion 33b, and the projections of the door portion 34 engage with these grooves.

The door portion 34 has a semi-cylindrical shape, and rotates in the direction of the arrow in fig. 8 to open and close the core holder 19 with the upper end projection engaged with the groove of the fixing portion 33a and the lower end projection engaged with the groove of the fixing portion 33b. That is, the door portion 34 rotates along the circumference of the cylindrical portion of the capsule-shaped core holder 19 to open and close the core holder 19.

The gate portion 34, if rotated, is housed so as to be along the inner wall of the portion of the core holder 19 housed in the needle-side body 12, and the core holder 19 is in an open state.

The protruding half capsule-shaped portion (including the door portion 34) of the core holder 19 is housed in a cavity inside the core-side body 11 in a state where the compass is closed. Thus, even if the core holder 19 is provided, the pen shape can be maintained in a closed state of the compass, and the refill can be stored in order.

That is, the present compass is provided to hold the pen shape by housing the core holder 19 inside the main body in a closed state, and to hold the refill together with the main body without damaging the shape of the slim line and operability by allowing the core holder 19 to appear if opened.

Compared with the structure that the core replacing part is held by a container different from the main body and the structure that the accommodating part for the core replacing part is arranged at the outer side of the main body, the compasses can carry the core replacing part and the compasses main body together by arranging the core holding frame 19, can replace the core immediately when needed and can prevent the core replacing part from being lost.

The fixing

portions

33a and 33b and the door portion 34 are made of POM (polyacetal) resin, and are not easily slid when a user performs an operation of rotating the door portion 34.

Here, the core holder 19 is formed from the needle side body 12 to one side of the core side body 11, but may be formed so as not to protrude from the needle side body 12.

In this case, the gate portion 34 is formed in a planar shape that is not curved, and slides in the longitudinal direction (upward or downward direction) or the lateral direction of the needle side body 12 to open and close the core holder 19.

[ application example: the size of the circle is consistent ]

In the conventional compass, when drawing a circle, the core-side body 11 and the needle-side body 12 are opened, and the distance between the core 31 and the needle 32 is measured by a ruler or the like, and the degree of opening is adjusted so as to match a desired radius.

In addition, while a circle is being drawn, a circle may not be drawn correctly due to a radius misalignment.

In an application example of the compass, a simple scale portion is provided as an accessory separately from the main body, the scale portion can be attached to the main body, a circle of a specific size can be drawn without measurement by a ruler, and the interval (angle) between the core-side main body 11 and the needle-side main body 12 can be fixed so that the size does not shift during drawing.

An example of the application will be described.

[ Structure (1) of scale portion ]

The structure (1) of the scale section will be described with reference to fig. 9. Fig. 9 is an explanatory view showing a configuration (1) of the scale portion, (a) shows a protrusion provided on the main body side, and (b) shows a state in which the scale portion 4 is attached to the present compass.

The scale portion 4 may be attached to either the core-side body 11' or the needle-side body 12', but here, the structure attached to the needle-side body 12' will be described.

As shown in FIG. 9 (a), in the present compass to which the scale 4 can be attached, 2

projections

21a and 21b are provided on the needle side body 12 'and a projection 21c is provided on the core side body 11'. The scale 4 is attached to the compass by the

protrusions

21a, 21b, and 21c and fixed to a desired radius.

The positions where the

protrusions

21a, 21b, and 21c are provided are arbitrary, but may be provided in the

recesses

16a and 16b, for example.

As shown in fig. 9 (b), the scale 4 is detachably attached to the needle-side body 12' of the present compass.

The notch 4 is formed in a bow shape (circular arc shape) from a thin plate of plastic or the like, and has

holes

41a and 41b formed in one end portion and a plurality of holes 42 arranged in a circular arc shape toward the other end portion.

The hole 42 has a radius of 2.0cm, 2.5cm, 3.0cm, 3.5cm \8230: \, 8230, and the corresponding value of the radius dimension is described in the vicinity of each hole 42. That is, the space between the needle 32 and the core 31 is set to a corresponding radial dimension by engaging the respective hole portions 42 with the protrusions 21c.

Specifically, as shown in fig. 9 (b), the

projections

21a and 21b of the needle-side body 12 'engage with the

holes

41a and 41b provided at the end of the scale 4, thereby fixing the scale 4 to the needle-side body 12'. By providing 2 protrusions, the scale 4 can be firmly fixed without rotation.

Further, the projection 21c provided on the core-side body 11' is engaged with any one of the holes 42 of the scale 4, and the interval (angle) between the needle-side body 12' and the core-side body 11' is fixed so as to have a specific radial dimension.

The diameter of the

projections

21a, 21b, 21c is formed to be equal to or slightly larger than the diameter of the

holes

41a, 41b,42, and the

holes

41a, 41b,42 are deformed and expanded when the scale section 4 is attached and detached, and are not accidentally detached in the attached state.

When the scale portion 4d is used, it cannot be fixed to a dimension other than the hole portion 42, but can be easily set to a radius dimension which is often used with a simple configuration, and can prevent dimensional displacement during the process of drawing a circle, thereby improving convenience.

[ Structure (2) of scale portion ]

In the above-described configuration (1) of the scale portion, it is necessary to form a protrusion portion in the compass body in advance, but in the configuration (2) of the scale portion, it is possible to easily realize the configuration without adding a change to the compass body.

The structure (2) of the scale section will be described with reference to fig. 10. Fig. 10 is an explanatory view showing a structure (2) of the scale section, (a) shows a state in which the scale section 5 is attached to the present compass, (b) shows an attachment portion to the needle-side body 12, and (c) shows an engagement portion to the core-side body 11.

The scale portion 5 is detachably fixed to either one of the needle side body 12 and the core side body 11 of the compass, and here, it is shown that it is attached to the needle side body 12.

As shown in fig. 10 (a), the scale section 5 is formed in a bow shape by plastic or the like, includes a plurality of scale marks 51, and is detachably fixed to the needle-side body 12 by a fixing section 52. Similarly to the scale section 4, the value of the radius is shown in the vicinity of the scale line 51, but the illustration thereof is omitted.

Further, a pressing portion 54 as a detachable member is attached to the core-side body 11.

The holding portion 54 is a component that lightly holds the scale portion 5 on the core-side body 11, and a through hole 56 (see fig. 10 c) is formed in the left-right direction in fig. 10 a, and the scale portion 5 passes through the through hole 56, and the holding portion 54 slides on the scale portion 5 in association with the opening and closing operation of the core-side body 11.

The presser 54 is formed of a transparent member, and a standard scale matching portion 55 having a desired radius is formed on the surface. The scale matching portion 55 is drawn long so as not to be mixed with the scale lines 51 of the scale portion 5. The scale matching portion 55 and the scale line 51 may be made of different colors.

The user can see the scale marks 51 of the scale section 5 through the transparent presser 54 while opening and closing the core-side body 11, and the length of a desired radius is matched to the scale matching section 55 using the scale marks 51 as a standard, and the distance between the needle 32 and the core 31 of the present compass is the length of the radius.

As shown in fig. 10 (b), a fixing portion 52 formed in an L shape is provided at the left end portion of the scale portion 5.

The fixing portion 52 is formed to have a size and a length that fit into the recessed portion 16b of the needle side body 12, for example. Thereby, the scale portion 5 is always mounted at the same position, and deviation of the radius dimension is prevented.

As shown in fig. 10 (c), a hold-down portion 54 is attached to the recessed portion 16a of the core-side body 11. The pressing portion 54 includes a fixing portion 53 formed in an L shape, and is fitted and fixed to the recessed portion 16b. As described above, the through-hole 56 is provided in the presser 54, and the scale portion 5 penetrates therethrough.

[ Effect of the embodiment ]

According to the present compass, as a pen-type compass, the core holder 19 for housing the core (refill) 31 is provided inside one of the needle-side body 12 and the core-side body 11, and the door portion 34 for opening and closing the core holder 19 is formed on a surface facing the other body where the core holder 19 is not provided, and the following effects are obtained: the replaceable core can be kept in the compass main body, can be immediately replaced when needed, and can be prevented from being lost.

Further, according to the compass, since the scale portion 4 is detachably provided in the main body, the compass has the following effects: even if there is no ruler, the compasses can be easily opened in accordance with the radius, and the opened state can be fixed by engaging the hole 42 of the scale 4 with the protrusion 21c of the body, so that the radius can be prevented from being displaced during drawing, and the convenience can be improved.

Further, according to the present compass, the recess 17 for housing the centering portion 15 of the holding core 31 and the through hole 171 penetrating the side surface of the core side body 11 from the recess 17 to the outside are formed inside the front end portion of the core side body 11, and the centering portion 15 includes the projection 153 projecting from the through hole and engaging with the centering nut 14 in a state of being housed in the recess 17, so that the following effects are provided: if the stationary core part 15 is housed in the recess 17 and the protrusion 153 is inserted into the through hole 171 of the core-side body 11, the stationary core part 15 can be held so as not to fall off from the body even if an operator presses it with his hands, and by screwing the stationary core nut 14 to the protrusion 153 protruding outward, the stationary core part 15 can be pressed against the inner wall of the recess 17 to fix the core 31, and the entire operations of attaching and detaching the core and adjusting the core can be greatly facilitated, and further, the number of parts can be reduced to prevent the loss of the parts.

Further, according to the compass, since the slit 152 is formed along the core insertion hole 151 in the stationary core portion 15, the following effects are obtained: when the centering nut 14 is loosened, the slit 152 is opened to facilitate the insertion and removal of the core 31, and when the centering nut 14 is tightened, the slit 152 is closed to securely fix the core 31.

Further, according to the present compass, since the width of the cross-sectional shape of the concave portion 17 is formed so as to be narrower toward the through hole 171 and the width of the cross-sectional shape of the stationary core portion 15 is formed so as to be narrower toward the protruding portion 153, the following effects are provided: by tightening the centering nut 14, the portion wider than the upper portion can be pressed against the inner wall of the recess 17, and the core 31 can be reliably fixed.

Further, according to the present compass, since the centering portion 15 and the centering nut 14 are formed of an elastic POM (polyacetal) resin, the following effects are obtained: is not easy to slide and easy to operate.

Further, according to the compass, since the core holder 19 is provided inside the needle-side body 12, the following effects are obtained: the replacement core may not be managed by another box or the like, and the loss of the replacement core can be prevented.

Possibility of industrial utilization

The present invention is suitable for pen compasses which have excellent portability, can be easily operated such as replacement of a core, and are less likely to lose parts.

Description of the symbols

1: body, 2: cap, 4, 5: scale part, 10: center part, 11: core side body, 12: needle side body, 13: body connecting part, 14: nut for centering, 15: centering part, 16 (16 a, 16 b) dent part, 17: dent part, 19: core holder, 21a, 21b, 21c: protruding part, 31: core, 32: needle, 33 (33 a, 33 b) fixing part, 34: gate part, 41a, 41b,42: cave part, 51: scale mark, 52, 53: fixing part, 54: pressing part, 55: scale matching part, 56, 171: through hole, 151: core inserting hole, 152: slit, 153: protruding part, 172: core receiving part.

Claims

1. A pen-type compass having a needle-side body serving as a leg portion on which a needle is provided and a core-side body serving as a leg portion on which a core is mounted, wherein the pen-type compass is formed into a substantially cylindrical shape if the needle-side body and the core-side body are closed in a matched manner,

a core holder for accommodating a core is provided inside one of the needle side body and the core side body,

a door part for opening and closing the core holder is formed on a surface opposite to the other body without the core holder,

has a core fixing portion for holding the core and a core fixing nut for fixing the core fixing portion to the core side body,

a recess for accommodating the stationary core portion, a core accommodating portion for accommodating and holding an upper end portion of the core held by the stationary core portion, and a through hole extending from the recess through a side surface of the core-side body are formed inside the core-side body,

the core fixing portion includes a protruding portion that protrudes outward from the through hole in a state of being accommodated in the recess portion and engages with the core fixing nut,

the core fixing portion has a slit substantially parallel to a core insertion hole into which the core is inserted,

the slit is formed on the fixed core part in a manner of being visible from the inner side of the core side main body,

the core housing portion is formed to be open so that the housed core can be seen from the inside of the core-side body.

2. The pen compasses of claim 1, wherein,

the core holder is substantially capsule-shaped and is provided to protrude from the inner side of one body provided with the core holder toward the other body not provided with the core holder,

a space for accommodating the protruding portion is formed inside the other main body.

3. The pen compass of claim 1 wherein the door of the core holder is slidably opened and closed along the circumference of the capsule-shaped cylindrical portion.

4. The pen compasses of claim 1, wherein,

the recess is formed so as to narrow toward the through-hole,

the cored portion is formed in a manner to be tapered toward the protruding portion,

when the stationary core part is accommodated in the recess and the protrusion part is screwed in a state where the protrusion part protrudes from the through hole, a side surface of a portion thicker than an end part of the stationary core part where the protrusion part is provided is pressed against an inner wall of the recess and fastened, and the slit is closed.

5. The pen compass as claimed in claim 1, wherein the stationary core part and the stationary nut are made of a resin having elasticity.