KR101311366B1 - Composite writing instrument - Google Patents

Abstract

The composite writing instrument according to the present invention includes a hollow outer cylinder having a slide groove extending in the longitudinal direction in the middle thereof, and open at both ends thereof, an inner cylinder slidably inserted into the outer cylinder, and disposed inside the inner cylinder, respectively. The tip portion includes a plurality of writing cores protruding outward from both ends of the inner cylinder, an operation knob disposed on one side of the outer surface of the inner cylinder and slidably accommodated in the slide groove, wherein the user moves the operation knob along the slide groove. Accordingly, the inner cylinder is moved so that a plurality of writing cores may be exposed to the outside from one end or the other end of the outer cylinder. The composite writing instrument according to the present invention includes a plurality of writing cores and slides the inner cylinder combined with the writing cores from the inside of the outer cylinder to expose the tip portion of the writing core to the outside of the outer cylinder. Can be used.

Description

Composite writing instrument

The present invention relates to a writing instrument, and more particularly, to a composite writing instrument having a plurality of writing cores that can protrude from both ends of the outer cylinder, the user can select and use the writing core.

In general, writing instruments include a pencil, a ballpoint pen, a signature pen, a highlighter, and the like, and are used by exposing the tip of the writing core to the outside. Such writing instruments are fixed to the outer cylinder with the tip portion of the writing core exposed to the outside, and the writing pen is assembled to the writing cylinder to move the cap on the tip of the writing core exposed to the outer cylinder, and the tip portion is moved outward by the operation of the pressing member. There is a knock type writing instrument that is exposed or inserted.

The knock writing instrument is configured to move the writing core by pressing the pressing member once to expose the tip portion to the outside of the outer cylinder, and press the pressing member to move the writing core to insert the tip portion into the outer cylinder. Such a knock writing instrument has a spring for exerting a force on the opposite side of the tip and a knock means for keeping the writing core moved or returning the writing core to its original position during operation of the pressing member.

In addition, a special writing instrument is a compound writing instrument. The composite writing instrument is a writing instrument in which a plurality of writing cores are installed in one outer cylinder so that a user can select and use the writing cores. The composite writing instrument may be classified into a slide type and a rotary type according to a method of exposing the writing core from the outer cylinder.

The slide type composite writing instrument has a structure in which a plurality of writing cores are disposed inside the outer cylinder, and an operation member coupled to each writing core on the side of the outer cylinder allows the user to select the writing core by manipulating the operating member. The rotary composite writing instrument has a structure in which writing cores, such as a ball pen core or an integrated sharp inner cylinder, are alternately exposed when the predetermined portion of the outer cylinder is rotated in the circumferential direction.

However, the conventional composite writing instruments have a large number of components, such as a cam operating part or a spring, and a complicated structure in order to select a writing core and expose it to the outside of the outer cylinder. Therefore, it is difficult to assemble and high manufacturing costs, there is a problem that often malfunctions and failures.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a composite writing instrument having a simple structure and which allows a user to easily select and use a writing core required from a plurality of writing cores.

Composite writing implements according to one aspect of the present invention for achieving the above object is provided with a slide groove extending in the longitudinal direction in the middle and both ends of the hollow outer cylinder, the slide is inserted into the inside of the outer cylinder An inner cylinder, a plurality of writing cores disposed inside the inner cylinder and each tip portion protruding outward from both ends of the inner cylinder, and an operation knob disposed on one side of an outer surface of the inner cylinder and slidably received in the slide groove; In addition, as the user moves the manipulation knob along the slide groove, the inner cylinder may move to expose the plurality of writing cores from one end or the other end of the outer cylinder to the outside.

Two or more writing cores may be disposed at one end and the other end of the inner cylinder, respectively.

Composite writing instruments according to one aspect of the present invention is provided on any one of the inner surface of the outer cylinder and the outer surface of the inner cylinder and the uneven rail having a plurality of grooves arranged at regular intervals along the direction of movement of the inner cylinder, the inner surface of the outer cylinder And a protrusion provided on the other side of the inner surface of the inner cylinder to be inserted into the groove, and the inner cylinder can move when an external force of a predetermined size or more is applied by inserting the protrusion into the groove.

Composite writing instruments according to one aspect of the present invention is provided on either of the inner surface of the outer cylinder and the outer surface of the inner cylinder and the uneven rail having a plurality of protrusions disposed at regular intervals along the direction of movement of the inner cylinder, the inner surface of the outer cylinder And a groove provided on the other side of the inner surface of the inner cylinder to allow the protrusion to be inserted, and the inner cylinder can move when an external force of a predetermined size or more is applied by inserting the protrusion into the groove.

The composite writing instrument according to one aspect of the present invention is a guide groove provided along one of the inner surfaces of the outer cylinder and the outer surface of the inner cylinder along a moving direction of the inner cylinder, and the other of the inner surface of the outer cylinder and the outer surface of the inner cylinder. It may further include a guide protrusion provided to be inserted into the guide groove.

The composite writing instrument according to one aspect of the present invention further includes a fixing groove provided on one of the outer cylinder and the operation knob, and a locking protrusion provided to be inserted into the fixing groove on the other side of the outer cylinder and the operation knob. When the inner cylinder is located at the center of the outer cylinder, the locking protrusion may be inserted into the fixing groove.

The outer cylinder may include a first body and a second body, and the first body and the second body may be hinged to be opened to each other.

The operation knob may be detachably coupled to one side of the outer surface of the inner cylinder.

Composite writing instrument according to another aspect of the present invention for achieving the above object is a hollow outer cylinder having a first slide groove and a second slide groove extending in the longitudinal direction in the middle and open at both ends, the inside of the outer cylinder A first inner cylinder inserted slidably into the second cylinder, a second inner cylinder slidably inserted into the outer cylinder, the first inner cylinder and the second inner cylinder respectively, and each tip portion of the first inner cylinder A plurality of writing cores projecting outwardly from both ends and both ends of the second inner cylinder, a first operation knob disposed on one side of an outer surface of the first inner cylinder and slidably received in the first slide groove, the second A second operation knob disposed on one side of an outer surface of the inner cylinder and slidably received in the second slide groove; As the operation knob is moved along the first slide groove, the first inner cylinder is moved so that the tip portion of the writing lead disposed in the first inner cylinder is exposed to the outside from one end or the other end of the outer cylinder, and the user As the second manipulation knob is moved along the second slide groove, the second inner cylinder may move to expose the tip portion of the writing lead disposed in the second inner cylinder to the outside from one end or the other end of the outer cylinder.

According to another aspect of the present invention, a composite writing instrument includes: a plurality of first grooves disposed on one of the inner surfaces of the outer cylinder and the outer surface of the first inner cylinder at regular intervals along a moving direction of the first inner cylinder, the inner surface of the outer cylinder And a first protrusion provided to be inserted into the first groove on the other side of the outer surface of the first inner cylinder, along the moving direction of the second inner cylinder on either one of the inner surface of the outer cylinder and the outer surface of the second inner cylinder. A plurality of second grooves arranged at regular intervals, the second projection is provided to be inserted into the second groove on the other of the inner surface of the outer cylinder and the outer surface of the second inner cylinder, the first projection The first inner cylinder is inserted into the first groove to move when an external force of a predetermined size or more is applied, and the second inner cylinder is inserted into the second groove so that the second inner cylinder is of a predetermined size or more. Can move when applied.

The composite writing instrument according to the present invention includes a plurality of writing cores and slides the inner cylinder combined with the writing cores from the inside of the outer cylinder to expose the tip portion of the writing core to the outside of the outer cylinder. Can be used.

In addition, the composite writing instrument according to the present invention has a simple structure in which the inner cylinder combined with a plurality of writing cores is moved from the outer cylinder by the operation knob, so that it can be manufactured at low cost, less trouble occurs, and the writing core can be easily replaced. have.

Figure 1 shows the composite writing instrument by separating the cap according to an embodiment of the present invention.
Figure 2 shows the composite writing instruments according to an embodiment of the present invention by separating the outer cylinder and the inner cylinder.
Figure 3 is a cross-sectional view showing a state in which the inner cylinder of the composite writing instrument according to an embodiment of the present invention is located in the center of the outer cylinder.
Figure 4 is a cross-sectional view showing a state in which the tip portion of the writing instrument is exposed to the outside by moving the inner cylinder of the composite writing instrument according to an embodiment of the present invention to one end of the outer cylinder.
Figure 5 shows separately the composite writing instruments according to another embodiment of the present invention.
Figure 6 shows the separate composite writing instruments according to another embodiment of the present invention.
7 is a cross-sectional view showing a composite writing instrument according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, it will be described in detail with respect to the composite writing instruments according to the present invention.

In describing the present invention, the sizes and shapes of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of explanation.

Figure 1 shows the composite writing instrument according to an embodiment of the present invention by separating the cap, Figure 2 shows the composite writing instrument according to an embodiment of the present invention by separating the outer cylinder and the inner cylinder, Figure 3 is Cross-sectional view showing a state in which the inner cylinder of the composite writing instrument according to an embodiment is located in the center of the outer cylinder.

As shown in Figures 1 and 2, the composite writing instrument 100 according to an embodiment of the present invention is inserted into the hollow outer cylinder 110, the outer cylinder 110, both ends of which are open so that the slide can be moved inside. The inner cylinder 130 to be, the plurality of writing cores 140, 141, 142 and 143 disposed inside the inner cylinder 130, the operation knob 150 disposed on one side of the outer surface of the inner cylinder 130, the outer cylinder ( And a pair of caps 160 coupled to both open ends of the 110. The cap 160 is coupled to both ends of the outer cylinder 110 to cover both open ends of the outer cylinder 110. The composite writing instrument 100 moves the inner cylinder 130 by the operation knob 150 to the tip portions 144, 145, 146, 147 of the writing cores 140, 141, 142, 143. By exposing the outside of the outer cylinder 110, the writing cores 140, 141, 142, 143 can be selected and used.

The outer cylinder 110 includes a first body 111 and a second body 112. The first body 111 and the second body 112 are rotatably coupled to each other by a hinge pin 113. As shown in FIG. 2, by rotating the first body 111 and the second body 112 about the hinge pin 113, the outer cylinder 110 may be opened so that the inside thereof is exposed to the outside. A plurality of coupling holes 114 are provided at the edge of the first body 111, and a plurality of coupling protrusions 115 corresponding to the coupling holes 114 are provided at the edge of the second body 112. When the edge of the first body 111 and the edge of the second body 112 are in contact with each other, the plurality of coupling protrusions 115 are inserted into the plurality of coupling holes 114, so that the first body 111 and the second body ( 112 may be fixed with each edge abutting.

In the center of one surface of the second body 112, a slide groove 116 for accommodating the manipulation knob 150 is provided in the longitudinal direction. When the inner cylinder 130 is received inside the outer cylinder 110, the operation knob 150 is exposed to the outside through the slide groove 116. A pair of locking protrusions 117 protrude from the circumferential portion of the slide groove 116 of the second body 112. The pair of locking protrusions 117 are disposed to face each other at the center of the slide groove 116.

As shown in FIG. 2, a pair of uneven rails 118 are disposed on both inner surfaces of the center of the first body 111 so as to face each other, and a guide protrusion between the pair of uneven rails 118. 120 is disposed. Each uneven rail 118 has a plurality of grooves 119 formed at regular intervals along the moving direction of the inner cylinder 130.

The inner cylinder 130 has a length shorter than that of the outer cylinder 110 so that the inner cylinder 130 can be completely accommodated inside the outer cylinder 110. The inner cylinder 130 is provided with a space for accommodating the plurality of writing cores 140, 141, 142, 143. The outer circumferential shape of both ends of the inner cylinder 130 is formed in a shape corresponding to the inner circumference of the outer cylinder 110, there is almost no gap between the outer cylinder 110 and the end of the inner cylinder 130.

Recesses 131 are provided in the middle of both sides of the inner cylinder 130, respectively. Each recess 131 is provided with a plurality of protrusions 132, respectively. The outer surface of each protrusion 132 is formed of a curved surface corresponding to the groove 119 provided in the outer cylinder 110. As shown in FIG. 3, when the inner cylinder 130 is accommodated in the outer cylinder 110, the plurality of protrusions 132 are inserted into the plurality of grooves 119, respectively. The protrusion 132 may be formed integrally with the inner cylinder 130 or may be coupled to the inner cylinder 130 after being made of a separate elastic material from the inner cylinder 130.

One surface of the inner cylinder 130 is provided with a guide groove 133 in which the guide protrusion 120 of the outer cylinder 110 can be inserted in the longitudinal direction of the inner cylinder 130. The guide protrusion 120 is inserted into the guide groove 133 when the inner cylinder 130 is accommodated in the outer cylinder 110, and the guide protrusion 120 moves in the guide groove when the inner cylinder 130 moves inside the outer cylinder 110. By sliding along 133, the linear movement of the inner cylinder 130 may be more smoothly performed. The position of the guide groove 133 and the guide protrusion 120 may be variously changed. For example, a guide groove may be provided in the outer cylinder 110, and a guide protrusion may be provided in the inner cylinder 130.

When the inner cylinder 130 slides, the protrusion 132 moves in contact with the uneven rail 118. The moving distance of the inner cylinder 130 is limited to the distance that the protrusion 132 does not leave the groove 119 of the uneven rail 118. When the user moves the inner cylinder 130, the protrusion 132 moves along the plurality of grooves 119. As the protrusion 132 is inserted into the groove 119, the inner cylinder 130 may move only when an external force of a predetermined size or more is applied, and the movement of the inner cylinder 130 is restricted by the action of the protrusion 132 and the groove 119. .

Although a plurality of protrusions 132 are illustrated in the drawing, the number of the protrusions 132 may be changed to one or more various numbers. In addition, the positions of the protrusion 132 and the groove 119 may be interchanged. That is, the uneven rail having protrusions disposed at regular intervals on the inner surface of the outer cylinder 110 may be provided, and one or more grooves may be provided on the outer surface of the inner cylinder 130.

The plurality of writing cores 140, 141, 142, 143 are disposed in the inner cylinder 130 in parallel in the longitudinal direction of the inner cylinder 130. The first writing core 140 and the second writing core 141 are arranged on the same line among the plurality of writing cores 140, 141, 142, and 143, and the third writing core 142 and the fourth writing core are arranged on the same line. Shims 143 are disposed on the same line. The tip portion 144 of the first writing lead 140 and the tip portion 146 of the third writing lead 142 protrude from one end of the inner cylinder 130, and the tip portion 145 of the second writing lead 141 and the first tip 144 of the second writing lead 141. The tip portion 147 of the writing core 143 protrudes from the other end of the inner cylinder 130.

Therefore, when one end of the inner cylinder 130 is moved to the outside of the outer cylinder 110, the tip portion 144 of the first writing core 140 and the tip portion 146 of the third writing core 142 from one end of the outer cylinder 110 When the other end of the inner cylinder 130 is moved to the outside of the outer cylinder 110, the tip portion 145 of the second writing core 141 and the tip portion 147 of the fourth writing core 143 of the inner cylinder 130 are moved. Exposed from the other end.

The plurality of writing cores 140, 141, 142, and 143 may be selected from various writing instruments such as a pencil, a ball pen, a sign pen, a highlighter, and the like. For example, as shown in the drawing, the first writing lead 140 and the second writing lead 141 are each made of different color ballpoint pens, and the third writing lead 142 and the fourth writing lead 143 are different from each other. It may be made of a colored pen.

The operation knob 150 is disposed at the center of one outer surface of the inner cylinder 130. Both sides of the operation knob 150 are provided with fixing grooves 151 corresponding to the locking projections 117 of the outer cylinder 110, respectively. The upper surface of the operation knob 150 is provided with an uneven portion 152 to increase the surface friction force to prevent the user's finger slip. Since the operation knob 150 can only move within the slide groove 116, the moving distance of the inner cylinder 130 is equal to the distance that the operation knob 150 can move. When the manipulation knob 150 is positioned at the center of the slide groove 116, the locking protrusion 117 of the outer cylinder 110 is inserted into the fixing groove 151. The user may confirm that the manipulation knob 150 is located at the center of the slide groove 116 through the insertion of the locking protrusion 117 into the fixing groove 151 of the manipulation knob 150.

When the operation knob 150 is located at the center of the slide groove 116, the tip portions 144, 145, 146, 147 of all the writing cores 140, 141, 142, 143 are the outer cylinder 110. The inner cylinder 130 is moved in the direction in which the external force is applied when the user pushes the operation knob 150 toward the end of the outer cylinder 110. When the inner cylinder 130 moves, the protrusion 132 of the inner cylinder 130 passes through the other grooves 119 which are sequentially disposed away from the grooves 119 that were initially inserted, and the grooves inserted when the movement of the inner cylinder 130 stops. It becomes political at (119).

As shown in FIG. 4, when one end of the inner cylinder 130 is moved toward the end of the outer cylinder 110, the tip portions 144 and 146 of the first writing core 140 and the third writing core 142 are the outer cylinder. It protrudes out of 110. At this time, since the protrusion 132 of the inner cylinder 130 is inserted into the groove 119 of the outer cylinder 110, the inner cylinder 130 is in a stopped state unless an external force of a predetermined size or more is applied toward the inner side of the outer cylinder 110. Will be maintained. Therefore, the user may use the first writing core 140 or the third writing core 142 protruding to the outside of the outer cylinder 110.

On the other hand, when you want to replace the writing core 140, 141, 142, 143 or the inner cylinder 130, open the first body 111 and the second body 112 of the outer cylinder 110, the outer cylinder 110 By exposing the inside, the writing cores 140, 141, 142, 143 or the inner cylinder 130 can be replaced without difficulty.

5 illustrates a composite writing instrument according to another embodiment of the present invention.

As shown in FIG. 5, the composite writing instrument 200 according to another embodiment of the present invention has a hollow outer cylinder 210 having both ends opened, and an inner cylinder slidably inserted into the outer cylinder 210. 220, a plurality of writing cores 140, 141, 142, and 143 disposed inside the inner cylinder 220, and an operation knob 230 disposed on an outer surface side of the inner cylinder 220. Although not shown in the drawing, the composite writing instrument 200 according to another embodiment of the present invention may further include a cap 160 (see FIG. 1) coupled to both ends of the outer cylinder 210.

The composite writing instrument 200 according to another embodiment of the present invention has the same basic structure as the composite writing instrument 100 according to the embodiment of the present invention described above. Hereinafter, in describing the composite writing instrument 200 according to another embodiment of the present invention, the same parts as in the above are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the center of one surface of the outer cylinder 210, a slide groove 211 for accommodating the operation knob 230 is provided in the longitudinal direction. When the inner cylinder 220 is received inside the outer cylinder 210, the operation knob 230 is exposed to the outside through the slide groove 211. A pair of engaging projections 212 are disposed at the circumference of the slide groove 211 of the outer cylinder 210 so as to face each other at the center of the slide groove 211.

A pair of uneven rails 213 are disposed on both inner surfaces of the center of the outer cylinder 210 so as to face each other, and a guide protrusion 120 (see FIG. 2) is disposed between the pair of uneven rails 213. Each uneven rail 213 has a plurality of grooves 214 formed at regular intervals along the moving direction of the inner cylinder 220.

The inner cylinder 220 has a length shorter than that of the outer cylinder 210 so as to be completely accommodated in the outer cylinder 210. Recesses 221 are provided in the middle of both sides of the inner cylinder 220, respectively. Each recess 221 is provided with a plurality of protrusions 222. The outer surface of each protrusion 222 is formed of a curved surface corresponding to the groove 214 provided in the outer cylinder 210. When the inner cylinder 220 is accommodated in the outer cylinder 210, the plurality of protrusions 222 are inserted into the plurality of grooves 214, respectively. A coupling groove 223 is provided on one surface of the inner cylinder 220, and a guide groove 133 (see FIG. 3) into which the guide protrusion 120 of the outer cylinder 210 may be inserted into the other surface of the inner cylinder 220. 220 is provided in the longitudinal direction.

The inner cylinder 220 is provided with a space for accommodating the plurality of writing cores 140, 141, 142, 143. The plurality of writing cores 140, 141, 142, 143 are disposed in the inner cylinder 220 in parallel in the longitudinal direction of the inner cylinder 220. The tip portion 144 of the first writing core 140 and the tip portion 145 of the second writing core 141 protrude from one end of the inner cylinder 220, and the tip portion 146 of the third writing core 142 and the first writing core 142. The tip portion 147 of the writing core 143 protrudes from the other end of the inner cylinder 220.

The manipulation knob 230 includes a coupling protrusion 231 corresponding to the coupling groove 223, so that the manipulation knob 230 is fixed to the inner cylinder 220 by inserting the coupling protrusion 231 into the coupling groove 223. have. Both sides of the operation knob 230 are provided with fixing grooves 232 corresponding to the locking projections 212 of the outer cylinder 210, respectively. The upper surface of the operation knob 230 is provided with an uneven portion 233 to increase the surface friction force to prevent the user's finger slip.

In the composite writing instrument 200 according to another embodiment of the present invention, since the operation knob 230 is detachably coupled to the inner cylinder 220, the writing core 140, 141, 142, 143 or the inner cylinder 220 are separated. If you want to replace the), after removing the operation knob 230 from the inner cylinder 220, the inner cylinder 220 can be taken out through the open end of the outer cylinder (210).

6 and 7 illustrate a composite writing instrument according to another embodiment of the present invention.

As shown in Figure 6 and 7, the composite writing instrument 300 according to another embodiment of the present invention to be slide-movable inside the hollow outer cylinder 310, the outer cylinder 310, both ends of which are open. A pair of inner cylinders 330 and 340 to be inserted, a plurality of writing cores 350, 351, 352 and 353 disposed inside each inner cylinder 330 and 340, and respective inner cylinders 330 ( 340, the operation knobs 360 and 370 coupled to one side of the outer surface. This composite writing instrument 300 is the user moves the inner cylinder 330, 340 to each operation knob 360, 370, tip portion 354, 355 of the writing core 350, 351, 352, 353 The writing cores 350, 351, 352, and 353 can be selected by exposing the 356 and 357 to the outside of the outer cylinder 310. Although not shown in the drawing, the composite writing instrument 300 according to another embodiment of the present invention may further include a cap 160 (see FIG. 1) coupled to both ends of the outer cylinder 310.

In the center of one surface of the outer cylinder 310, the first slide groove 311 and the second slide groove 312 are provided in parallel in the longitudinal direction. When each inner cylinder 330, 340 is received inside the outer cylinder 310, the first operating knob 360 and the second operating knob 370 are the first slide groove 311 and the second slide groove 312. ) Is exposed to the outside. A pair of first locking projections 313 are disposed at the circumference of the first slide groove 311 of the outer cylinder 310 so as to face each other at the center of the first slide groove 311, and the second slide of the outer cylinder 310 is disposed. A pair of second locking protrusions 314 are disposed at the center of the groove 312 so as to face each other at the center of the second slide groove 312.

The center of the outer cylinder 310 is partitioned by the partition wall 315, the first uneven rail 316 is disposed on one inner surface of the outer cylinder 310, and the second uneven rail on the other inner surface of the outer cylinder 310. 318 is disposed. The first uneven rail 316 has a plurality of first grooves 317 formed at regular intervals along the moving direction of the first inner cylinder 330, and the second uneven rail 318 moves the second inner cylinder 340. It has a plurality of second grooves 319 formed at regular intervals along the direction. The first guide protrusion 320 is provided between the partition wall 315 and the first uneven rail 316, and the second guide protrusion 321 is disposed between the partition wall 315 and the second uneven rail 318. Prepared.

The first inner cylinder 330 has a shorter length than the outer cylinder 310 so as to be completely accommodated in the inner cylinder 310. A depression 331 is provided in the middle of one side surface of the first inner cylinder 330, and the depression 331 is provided with a plurality of second protrusions 332. The outer surface of the second protrusion 332 has a curved surface corresponding to the first groove 317 of the first uneven rail 316. When the first inner cylinder 330 is accommodated in the outer cylinder 310, the second protrusion 332 is inserted into the first groove 317. As the first protrusion 332 is inserted into the first groove 317, the first inner cylinder 330 may move only when an external force of a predetermined size or more is applied. A coupling groove 333 is provided on one surface of the first inner cylinder 330, and a guide groove 334 into which the first guide protrusion 320 of the outer cylinder 310 is inserted may be provided on the other surface of the first inner cylinder 330. It is provided in the longitudinal direction of the first inner cylinder 330.

A space for accommodating the first writing core 350 and the second writing core 351 is provided inside the first inner cylinder 330. The first writing core 350 and the second writing core 351 are disposed in a straight line inside the first inner cylinder 330. The tip portion 354 of the first writing core 350 protrudes from one end of the first inner cylinder 330, and the tip portion 355 of the second writing core 351 protrudes from the other end of the first inner cylinder 330.

The second inner cylinder 340 has a length shorter than that of the outer cylinder 310 so as to be completely accommodated in the outer cylinder 310. A depression 341 is provided in the middle of one side surface of the second inner cylinder 340, and a plurality of second protrusions 342 are provided in the depression 341. The outer surface of the second protrusion 342 has a curved surface corresponding to the second groove 319 of the second uneven rail 318. When the second inner cylinder 340 is accommodated in the outer cylinder 310, the second protrusion 342 is inserted into the second groove 319. As the second protrusion 342 is inserted into the second groove 319, the second inner cylinder 340 may move only when an external force of a predetermined size or more is applied. A coupling groove 343 is provided at one surface of the second inner cylinder 340, and a guide groove 344 in which the second guide protrusion 321 of the outer cylinder 310 is inserted is provided at the other surface of the second inner cylinder 340. It is provided in the longitudinal direction of the second inner cylinder 340.

A space for accommodating the third writing core 352 and the fourth writing core 353 is provided inside the second inner cylinder 340. The third writing lead 352 and the fourth writing lead 353 are disposed in a straight line inside the second inner cylinder 340. The tip portion 356 of the third writing core 352 protrudes from one end of the second inner cylinder 340, and the tip portion 357 of the fourth writing core 353 protrudes from the other end of the second inner cylinder 340.

The first manipulation knob 360 includes a coupling protrusion 361 corresponding to the coupling groove 333 of the first inner cylinder 330, and the coupling protrusion 361 is inserted into the coupling groove 333 so that the first inner cylinder is inserted into the coupling groove 333. 330 may be fixed. Both side surfaces of the first manipulation knob 360 are provided with fixing grooves 362 corresponding to the first locking projections 313 of the outer cylinder 310, respectively. The upper surface of the first manipulation knob 360 is provided with an uneven portion 363 to increase the surface friction force to prevent the user's finger from slipping.

The second operation knob 370 has a coupling protrusion 371 corresponding to the coupling groove 343 of the second inner cylinder 340, and the coupling protrusion 371 is inserted into the coupling groove 343 so that the second inner cylinder 340 may be fixed. Both side surfaces of the second operation knob 370 are provided with fixing grooves 372 corresponding to the second locking projections 314 of the outer cylinder 310, respectively. The upper surface of the second operation knob 370 is provided with an uneven portion 373 to increase the surface friction force to prevent the user's finger from slipping.

The composite writing instrument 300 according to another embodiment of the present invention has a first inner cylinder 330 in which a plurality of writing instruments 350 and 351 are disposed and a second inner cylinder in which a plurality of writing instruments 352 and 353 are disposed. Since the 340 can be moved individually, only a necessary one can be selected and used from among a plurality of writing instruments 350, 351, 352, and 353 required by the user. In addition, when the first operation knob 360 and the second operation knob 370 are separated from the first inner cylinder 330 and the second inner cylinder 340, these inner cylinders 340 and 350 can be taken out of the outer cylinder 310. Since the first inner cylinder 330, the second inner cylinder 340, and the writing cores 350, 351, 352, and 353 can be replaced with each other, they can be used.

As described above, the composite writing instrument according to the present invention includes a plurality of writing cores and slides the inner cylinder combined with the writing cores from the inside of the outer cylinder to expose the tip portion of the writing core to the outside of the outer cylinder. You can choose to use it.

In addition, the composite writing instrument according to the present invention has a simple structure and can be manufactured at low cost, has a low occurrence of failure, and can easily replace the writing core.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention, and the protection scope of the present invention is limited only by the matters described in the claims. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

100, 200, 300: compound writing instruments 110, 210, 310: outer cylinder
111, 112: 1st, 2nd body 113: hinge pin
116, 211, 311, 312: slide grooves 117, 212, 313, 314: protrusion
118, 213, 316, 318: Uneven rail 120, 320, 321: Guide protrusion
130, 220, 330, 340: inner cylinder 132, 222, 332, 342: protrusion
140, 141, 142, 143, 350, 351, 352, 353
150, 230, 360, 370: operation knobs 231, 361, 371: engaging projection
315: bulkhead

Claims (10)

A hollow outer cylinder having a slide groove extending in a longitudinal direction in the middle thereof, and both ends of which are open;
An inner cylinder slidably inserted into the outer cylinder;
A plurality of writing cores disposed in the inner cylinder and each tip portion protruding outward from both ends of the inner cylinder;
An operation knob disposed on one side of an outer surface of the inner cylinder and accommodated in the slide groove to be slidably movable;
A guide groove provided on one of an inner surface of the outer cylinder and an outer surface of the inner cylinder along a moving direction of the inner cylinder; And
And a guide protrusion provided to be inserted into the guide groove on the other side of the inner surface of the outer cylinder and the outer surface of the inner cylinder.
And the inner cylinder is moved as the user moves the operation knob along the slide groove so that the plurality of writing cores can be exposed to the outside from one end or the other end of the outer cylinder.
The method of claim 1,
Composite writing instruments, characterized in that at least two writing cores are arranged at one end and the other end of the inner cylinder.
The method of claim 1,
An uneven rail provided on one of an inner surface of the outer cylinder and an outer surface of the inner cylinder and having a plurality of grooves arranged at regular intervals along a moving direction of the inner cylinder; And
And a protrusion provided to be inserted into the groove on the other side of the inner surface of the outer cylinder and the outer surface of the inner cylinder.
The inner pen is moved when the protrusion is inserted into the groove, the composite writing instrument, characterized in that when the external force is applied a predetermined size or more.
The method of claim 1,
An uneven rail having a plurality of protrusions provided on one of an inner surface of the outer cylinder and an outer surface of the inner cylinder and disposed at regular intervals along a moving direction of the inner cylinder; And
A groove provided to allow the protrusion to be inserted into the other of the inner surface of the outer cylinder and the outer surface of the inner cylinder;
The inner pen is moved when the protrusion is inserted into the groove, the composite writing instrument, characterized in that when the external force is applied a predetermined size or more.
delete The method of claim 1,
A fixing groove provided in one of the outer cylinder and the operation knob; And
A locking protrusion provided on the other side of the outer cylinder and the operation knob to be inserted into the fixing groove;
And the locking projection is inserted into the fixing groove when the inner cylinder is located at the center of the outer cylinder.
The method of claim 1,
The outer cylinder includes a first body and a second body, wherein the first body and the second body is a composite writing instrument characterized in that the hinge is coupled to open to each other.
The method of claim 1,
The manipulation knob is composite writing instruments, characterized in that detachably coupled to one side of the outer surface of the inner cylinder.
A hollow outer cylinder having a first slide groove and a second slide groove extending in a longitudinal direction in the middle thereof, and both ends of which are open;
A first inner cylinder which is slidably inserted into the outer cylinder;
A second inner cylinder slidably inserted into the outer cylinder;
A plurality of writing cores respectively disposed in the first inner cylinder and the second inner cylinder, each tip portion projecting outwardly from both ends of the first inner cylinder and both ends of the second inner cylinder;
A first manipulation knob disposed on one side of an outer surface of the first inner cylinder and accommodated in the first slide groove to be slidably movable;
And a second manipulation knob disposed on one side of an outer surface of the second inner cylinder and accommodated in the second slide groove so as to be slidably movable.
As the user moves the first manipulation knob along the first slide groove, the first inner cylinder is moved so that the tip portion of the writing lead disposed in the first inner cylinder is exposed to the outside from one end or the other end of the outer cylinder. And, as the user moves the second operation knob along the second slide groove, the second inner cylinder moves so that the tip portion of the writing lead disposed in the second inner cylinder is exposed to the outside from one end or the other end of the outer cylinder. Composite writing instruments, which can be.
The method of claim 9,
A plurality of first grooves disposed on one of an inner surface of the outer cylinder and an outer surface of the first inner cylinder at regular intervals along a moving direction of the first inner cylinder;
A first protrusion provided to be inserted into the first groove on the other of an inner surface of the outer cylinder and an outer surface of the first inner cylinder;
A plurality of second grooves disposed on one of an inner surface of the outer cylinder and an outer surface of the second inner cylinder at regular intervals along a moving direction of the second inner cylinder; And
A second protrusion provided to be inserted into the second groove on the other of the inner surface of the outer cylinder and the outer surface of the second inner cylinder;
When the first inner cylinder is inserted into the first groove, the first inner cylinder moves when an external force of a predetermined size or more is applied, and the second inner cylinder is inserted into the second groove when the second inner cylinder is applied an external force of a predetermined size or more. Composite writing instruments characterized by moving.

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