JPH03151296A - Pushing type composite writing utensil - Google Patents

Abstract

PURPOSE:To bring a writing body to an incorporating or writable state by the operation of one finger as a main body is left as it is gripped by engaging a pushing piece, which is arranged onto the outer circumference of the main body in a section being no hindrance to a hand and fingers when the main body is gripped for writing and can be selected as the main body is left as it is gripped, with the front section of the main body. CONSTITUTION:The tile composite writing utensil has a plurality of writing bodies 5-8 housed into a main body, connecting bodies 13-16 receiving energizing force in the retreat direction of the writing bodies by an energizing means 21 and writing pressure applied on writing, being connected to receiving sections 9-12 supporting the writing bodies and being extended in the forward direction, and pushing pieces 17-20 coupled near the front ends of the connecting bodies and disposed on the outer circumference of the main body in sections being no hindrance to a hand and fingers when the main body is gripped on writing. The pushing pieces are moved forward and retreated by one finger by selection as the main body is left as it is gripped on writing, and forwarded, and one parts 17a-20a of the pushing pieces are engaged with one part 1b of the front section of the main body at the time of a writable state. Accordingly, writing and release can be conducted by the operation of one finger.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention accommodates a plurality of cursive fonts in a main body, and when writing, by operating one finger while holding the cursive font, the tip writing part of the selected cursive font protrudes from the front end of the main body. The present invention relates to a composite writing instrument that can be moved to a writable state or retreated to a built-in state. The composite writing instrument of the present invention may be used as a single writing instrument that accommodates multiple writing instruments of the same type, but it can also be used as a composite writing instrument that accommodates multiple writing instruments that differ in color, core diameter, ball diameter, type, etc. suitable. [Prior art and its problems] In the past, various types of compound writing instruments have been developed, such as multicolored ballpoint pens and ones that house a mechanical pencil and a ballpoint pen in one body. First of all, multicolor ballpoint pens are often used that move forward by selecting one of the claws for each color provided near the rear end of the main body. The other claw on the rear end must be moved halfway forward in order to do so. I moved it forward and cut it [1/Matsuto], but the one of the previous color was pulled in, but instead the one of that color was locked in the forward position6 You have to bring it close to the rear end to operate it. Also, there are some that have a color display on the back of the main unit, and when you knock with the selected color facing up, a cursive letter of that color will appear, but this one has a directionality, and it is a hassle to have to switch hands and knock. There is. There is also a two-color ballpoint pen that uses a cam mechanism to change colors alternately, but when you want to change the color when storing it, you have to hold the main body and knock the rear end. There are also multicolored ballpoint pens that have multiple slits across the pen, and a protrusion protruding from the rear of the slit that moves forward to lock the cursive of the selected color in a state where it can be written, but the latching is still released. When you do this, you have to push one of the other protrusions that remain at the back part way. Therefore, when you store it and change the color of the pod, you still have to hold the main body. Also,
This type of writing cannot be replaced, so it is disposable and uneconomical. Next, with a mechanical pencil and a writing instrument with a ball of 1)
There are some that take out mechanical pencils and ballpoint pens by turning the device 1y and rotating left and right. This is a pain because you have to use both hands to rotate it, and if you want to put both the mechanical pencil and ballpoint pen in the built-in state, you have to stop the rotation at the middle position between the left and right sides. There are some that look at the color and display on the edge and select the display with the display facing up, then knock on the knock rod at the rear end, but this one has directionality and is used to retract the cursive that has been moved forward. must press the release protrusion near the rear end of the clip. Furthermore, if the lead wears out while using the mechanical pencil, you must change your grip on the main body and press the knock bar at the rear end to draw out the lead. As mentioned above, the common problems in the prior art are that the tip of the cursive writing part is advanced to a writable state and locked, released and built into the main body, and the color and cursive writing part are not compatible. Zuro 4.・
Collection'me) Timi: + Susumu published and nothing, holding the main body after a huge 1'' fi) 3% 4.1shi1 (blank, -to finger)
I rotated the IIF 10,000 part and the rear part relative to each other by using both knives. ,'
: *j It is not possible to operate the front part in this state. By first moving one finger backward and then forward while holding the main body, you can write the desired cursive handwriting. It is an object of the present invention to provide a composite writing instrument that can move a cursive body in an advanced position back to a built-in state and then move a different cursive body forward to make it ready for writing. Even when the lead of a mechanical pencil, which is locked forward in a writing-ready state, wears out during use, the lead can be pulled out with one finger without having to change the grip of the main body. It is an object of the present invention to provide a composite writing instrument that can be supplied in small quantities and at low cost. , a main body provided with an opening through which the tip writing part of the front end 1ζ pole writing body appears, a plurality of writing bodies housed in the main body, a biasing means for always urging the writing bodies in the backward direction, etc. a receiving part that supports the writing body by receiving a biasing force in a backward direction by a biasing means and a writing pressure applied during writing;
A connecting body connected to the receiving part and extending forward has 12 extruded pieces connected near the front end of the connecting body and arranged on the outer periphery of the main body in a part that does not get in the way of fingers when gripping the main body during writing. , While holding the main body when writing, move the selected push-out piece forward and backward with one finger, and in the advanced writable state, the push-out piece engages with a part of the front part of the main body. It is characterized by the fact that it has been established. The connecting body connecting the extruded pieces such as the receiving portion includes:
There are (1) those that extend forward along the outside of the main body, and (2) those that extend forward along the inside of the main body and whose front end portion is connected to the extruded piece through a slit provided in the main body. Further, as a means for a part of the extrusion piece to engage with the front part of the main body, (1) while pushing the extrusion piece 12 in the radial direction with a finger, the extrusion piece engages with the front part of the main body by component force. (2) The front part of the extrusion piece is inclined in the radial direction and a part of the front part of the main body, such as a hook part that crosses over the front end of the extrusion piece, engages. (3) The front part of the extrusion piece is provided with In some cases, the push-out piece engages with a portion of the front portion of the main body via a locking body. [Function] With the above configuration, the present invention selects one of the extruded pieces disposed at a position that does not interfere with the fingers while holding the main body during military writing, and presses one finger (e.g. By simply shifting the user's hand backwards and then moving the push-out piece forward, the user can advance the desired writing style and lock the writing tip in a writable state to write. When writing is finished, the engagement between the extruded piece 17 and a portion of the front portion of the body can be released using the same single finger. The writing body is housed in the main body due to the biasing force in the backward direction. Next, to select another cursive font and write, select the extruded piece (in this case, knead the main body) and move your fingertips to select the cursive font and the cursive piece. Also, times! You can do the same operation as when writing military notes in the original cursive. When writing with a mechanical pencil, if the lead wears out, you can push the push-out piece further from the locked position with your fingertips to move it forward. With this operation, the lead of the mechanical pencil is extended and you can continue writing. [Example] Next, an example of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment in which the present invention is applied to a four-color ballpoint pen, and FIG. 1 is a cross-sectional view showing the state when all four-color glue fills are built into the main body. In the figure, 1 is the tip, and the tip of the cursive writing part protrudes from the front end. It's 3℃. ,Ma/
X: A stepped portion 11) with a right-angled edge is installed around the 611th circumference of the front portion of the tar shaft.・* 4)、、There is a female thread cut on the inner surface of the rear end of tip--1. There is also a guide cylindrical body 2a that serves as a guide and partition for the three rear parts of the glue fill (Figs. 4 and 5).
*The rear portion of the rear shaft 2 is provided with a four-piece slit 2b through which the bent portion of the rear end of the connecting body passes through. 2b, 2b, and 2b are provided (see Fig. 5). Furthermore, a clip 3 is attached to the part without the slit (see Fig. 3). A female thread is cut on the inner surface of the rear end of the rear shaft 2,
A male thread on the front part of the tail plug 4 is screwed into the tail plug 4 to prevent the receiving part from moving backward, which will be described later. A male thread is cut on the outer surface of the front end of the rear shaft 2 and is screwed into a female thread on the inner surface of the rear end of the front shaft 1. Front axis 1,
The rear shaft 2 and tail plug 4 are screwed together to form an integral body. Next, prepare 4 wood glue fills 5.6 and 7.8 containing ink of 4 colors (usually black, red, blue, and green), and insert each rear part into the 4 holes of the guide cylinder 2a. (see Figs. 4 and 5), the protrusions 9a, 1 of the four receiving parts 9jO, 1IJ2 are inserted into the rear ends of the four wood glue fills 5, 6, 7.8.
There are 0a, lla, and 12a below. It extends outward from a part of the outer circumference of the four receiving parts, and extends outward from a part of the outer circumference of the four receiving parts, and
, Connecting bodies 13, 14, and 15 degrees 16 extending forward inside the slit and groove in the same line shape as the workpiece are connected to the receiving portions 9 and 10, respectively.
, 11.12 (see Figure 14, 5.6)
. The connecting body 13.14.15.16 has an outwardly extending portion passing through the slits l-2b, 2b, 2b, 2b of the rear axle 2, and a forwardly extending portion passing within the slit and the grooves 2e, 2 of the rear axle 2.
e. 2C12c (see Figure 4). A rectangular extruded piece 17 is provided at the front end of the connecting bodies 13, 14, 15, and 16.
．． 18, 19.20 are set C) respectively. The top surfaces of the extruded pieces 17, 18, 19.degree. 20 are provided with knurling for holding fingers. Further, the front end is bent in the radial direction, and the engaging portion 17 has an inclined surface at an angle of 90 degrees or more on the inner surface.
a. 18a, 19a, and 20a are provided. In the glue fill storage state shown in Fig. 1, the extruded pieces 17°18.
1!1.20 is a position that does not get in the way of the fingers when gripping the main body when writing, i.e., the outer periphery of the main body of the space created between the index finger, thumb, and the roots of both fingers. I'm sure it's in place. However, if you move one finger (for example, the thumb) backwards, you will be able to reach most of it. In addition, the extruded pieces 17, 18, 19° 20,
The inks of 41 refills 5, 6, and 7.8 have the same color. Next, the effect will be explained. Select your favorite color from among the four colors and apply the color. Hold the extruded piece 17 in the normal writing position with the tip @1, first move one finger (for example, the thumb) back, and then The tip end of the filter 5 that advances the extrusion piece 17 is the opening 1a of the tip shaft 1.
The writable state shown in FIG. 2 is more pronounced. At this time, the engaging part 17a of the pushing piece 17 is sandwiching the right-angled edge of the stepped part 1b of the tip shaft 1, so just by lightly pushing the pushing piece in the radial direction with your thumb, a component force is applied, and the guide cylindrical body The second
Continuing the state shown in the diagram, my hands and fingers are not tired. When you have finished writing, press 1-, piece 1'i4 (stroke) in the j direction, 1; use, ('' finger (in this case, thumb)), 1F (-
;So J: Yes, the engaging part 17a of the extrusion l- piece 17 is the stepped part i b of the tip shaft 1 =t M i? , -;:h) 2- The lock is automatically released by slipping Jt, 11y, and the refill 5 returns to the main body by the force of 3 and 21. 16
There was a great roar. Next, if you want to write with the color of the refill 7, you can rotate the main body 180 degrees by pushing your fingers while holding the main body, and push out the push-out piece 19. In this way, you can select your favorite color and write in your favorite color by simply operating the extrusion piece with one finger without having to change your grip, and when you have finished writing, move the extrusion piece in the radial direction. Just by releasing the pressure, the cursive will automatically be stored inside the body. In addition, in order to replace the old refill that has run out of ink with a new refill, use the front shaft 1 and the rear @2
Unscrew the old refill from the protrusion of the receiving part and remove it. Insert the new refill through the hole in the guide cylinder and insert the rear end of the refill into the protrusion of the receiving part. , I'X fliλ's evening cycle ν, : is the groove (-
'ririna;・)'s ry, wait': 41 S shika 6.
ap II + '43 When the evening 1 ゛
,． 4 extrusions + 41'i, 18.1! 1,
20 is out, but refill ``y exchange ζ: stand: 1;
Since the distance Ni returning to 0 is quite good, the stroke is (・
Minute 4゛I can't get it.Next, Figure 7,

A second embodiment of the present invention will be explained with reference to FIG. In the figure, the same reference numerals as those shown in Fig. 1 indicate the same or similar parts (the same shall apply hereinafter)
. In the figure, 1 is the front part of the main body, and an opening 1a is provided at the outpost. The rear end of the front part 1 is a small diameter part IC, and a male thread is cut on the outer surface of the part.
5. Slit 2b, 2b, 2b, 2b through which the tip of 16 passes
has been established. Moreover, guide grooves 2C92e, 2'e, and 2C are provided at the upper part (outward side) of the slit to allow most of the extruded pieces 17.degree. 18 and 19.degree. 20 to sink and move back and forth. The rear shaft 2 also has long grooves 2d, 2d on the inner surface into which rod-shaped portions extending forward of the connecting bodies 13, 14, 15, 16 are fitted and move forward and backward. 2d, 2d$: Provided (see Figure 8). long groove 2d,
2d, 2d, and 2d are connected to the through holes of the guide cylindrical body 2a, which also serves as the rear shaft 2 (see FIG. 8). In addition, the front end of the four-wooden through hole provided in the guide cylindrical body 2a widens in a trumpet shape, and the refills 5, 6, 7, 8
facilitates insertion. In this second embodiment, the guide cylindrical body 2a (which also serves as the ?&71J portion of the rear shaft 2) is inserted from the rear end portion of the slits 2b, 2b, 2b, 2b. It is provided at the rear.The front end of the rear shaft 2 has a small diameter part 2e, and a female thread is cut on the inner surface.
. 2e, 2c, stepped portion 2 from the bottom of 2c to the small diameter portion 2e
f has right-angled edges. A female thread is cut on the inner surface of the rear end of the rear shaft 2, and a tail plug 4 is screwed thereto. The tail plug 4 has receiving parts 9.1o and 11.12 when stored.
There is a ridge between the rear end of the push-out piece 19 in the stored state and the rear end of the guide groove 2C of the rear shaft 2, which serves as a stopper to prevent the rear shaft 2 from moving backward. Even if the tail plug 4 does not prevent the backward movement, the extruded piece 17.1B. The rear end of 19.20 may stop against the rear ends of the guide grooves 2C92C and 2C72C. Guide cylinder 2a
The fact that two storage springs 21, 22, 23.24 are interposed between the step part and the receiving part 94041.12 is that
6 Next, the rod-shaped connecting body 13 is the same as that of the first embodiment. Ill5, 1[Bend the outpost part of i outward (this part is also rod-shaped) and attach it to the extrusion hole 417°Ill, 19.20 through -2b! I'm in the pool. 1- In the stored state, 'τ is the front end inner surface: The extruded piece 17°18, 19.200 with the beak-shaped hooks 17b, 18b, 19b, and 20b is slightly raised in the guide groove. It is in a suspended - state, and the extruded piece 17
, 18, 19.20 is always j,: A force is acting to make it horizontal. Then, the extruded piece is advanced, and the hook part 17b,
18b. 1! When the lb and 20b reach the stepped portion 2f of the rear shaft front end, the hook falls into the stepped portion 2f and remains locked even when not pressed with a finger. Lock I
When dividing by day, push 1) Push the rear ends of pieces 17, 18, 19, and 20 in the radial direction with your fingers. FIG. 9 and FIG. 10 show the first actual IX! of the present invention! Word g11
・2・It is a cross-sectional view shown in Fig. 9, which contains both the 15-man Shihe~bubengunor and zl'-rubera, and the state of l,: etc. Figure 10 is a cross-sectional view of the mechanical pencil when it is in a state where it can write nO advance g (i '1''.) In both the first and second embodiments, the cursive writing is done using four ballpoint pens of different colors. Glue fill was used, but this third embodiment is a composite writing instrument that accommodates a mechanical pencil and a ballpoint pen in one piece.The mechanical pencil in this case has the barrel, knock cap, and eraser removed from a normal knock-type mechanical pencil. removal 17
This will be explained here as content 25. The front part 1 of the main body is paired with 1), and the front part of the contents is an internal cap 26.3 In the figure, the front part 1, the rear shaft 2, and the tail plug 4 (the eraser is provided at the rear end) are screwed together. This is the same as in the second embodiment in that the main body is formed using the same structure. Further, a stepped portion 2f having a right-angled edge is provided on the outer periphery of the front end of the rear shaft 2 on the axial extension line of the extruded piece 17.30 ('S i ': 2+X b
? N Bd T! :> Ahead *Evening of d11) Step 1 on the circumference
Set b (J1' is present).・7~))・Pen Renoil 1
5 and Shahnobe, '4i' in Noshiru: 25's 43
, , , , , 27 , J , 5 and storage , :'2
, this 'IJ' = 'Ii: Arrival row l: i: 士、sit
, -・-The contents 25 of the pencil are at the center j, 24 inside the main body.
9. The mechanical pencil will not tilt even when it is in the storage state 1 or moved forward and locked in the writable state.This is because conventional compound arithmetic writing instruments do not hold the contents of the mechanical pencil from the center of the main body. The difference is that it is placed at a slightly shifted position. In order to place the content 25 of the mechanical pencil in the center of the main body, the connecting body 29 connected to the receiving part 27 has an arm 29a extending from the receiving part 27 to the long groove 2a provided on the inner surface of the rear part of the rear shaft. has been established. The extrusion piece 17 is attached to the tip of the connector 13 of the ballpoint pen glue fill 5, which is the same as in the second embodiment, but the tip of the mechanical pencil connector 29 is fixed to the rear part of the extrusion piece 30. stomach"
It is being taken. The extruded piece 30 is the extruded piece 1 of a ballpoint pen.
Although it is longer in the axial direction than the 7, the front @ is the same, so it is in an awkward position if it gets in the way of your fingers when gripping the main body. The extruded piece 30 has a good appearance because most of the part is always submerged within Q$42c except for the knurled part 30a, which serves as a fingerhold, protruding from the outer peripheral surface of the main body. In this way, extrusion 1. The depressed state of the piece 30 remains the same even when writing, so there is no problem when turning it when writing with a mechanical pencil.9 The rear end of the locking body 31 provided on the extruded piece 30 is Although it slightly protrudes from the outer periphery of the main body, since the push-out piece 30 is long, even if the rear end of the locking body 31 protrudes from the main body, it is accommodated in a part that does not interfere with the fingers when writing. Next, the locking body 31 is attached to the extruded first piece 30 of the mechanical pencil.
I will explain how to get it. The extrusion piece 30 is provided with an axial slit 30b, and the locking body 31 is provided in the slit 30b so as to be swingable in the radial direction via the pin 32. A beak-shaped hook portion 31a is provided on the inner surface of the front end of the locking body 31. *A leaf spring 33 with a weak force is attached to the thin rear portion of the locking body 31, and the front end of the locking body 31 is always biased so as to tilt in the radial direction. Next, the operation will be explained, but since the operation when writing with a ballpoint pen is the same as in the second embodiment, the explanation will be omitted, and the operation when writing with a mechanical pencil will be explained. In the built-in state shown in FIG. 9, the user grips the front part of the tip barrel 1 in the same way as a normal writing instrument. The push-out piece 306 of the mechanical pencil and the push-out piece N of the ballpoint pen are also located at a position where they do not get in the way of the hands and fingers. Therefore, if you first shift one finger (for example, a thumb) backwards and place it on the push-out piece 30, and then move the push-out piece forward, the push-out piece 30 moves forward in the guide groove 2c, but the locking body 31 When the front end of the plate reaches the recess 2f, the plate spring 33 causes the hook 318 to hook on the step 1f. Then, the contents 25 of the brush pencil are locked in the forward movement 1, so writing is performed in the state shown in FIG. If the lead becomes worn out during military writing, simply move the extruded piece 30 forward by the distance ML with your finger in the state shown in Figure 0. Since it immediately comes into contact with the inner surface of the front part 1 and cannot move forward more than +1, the storage spring 2B, ボ%='7, compresses the crossbring 34, and the lead case 35 moves forward>1, and the fixed length lead is fed out. (This action is the same as that of a conventional mechanical pencil.) When you have finished writing, all you have to do is push the rear end of the locking body 31 in the direction of finger F. The engagement between the hook portion 31a and the stepped portion 1b is released, and the contents 25 of the mechanical pencil return to the main body by the force of the storage spring 28, resulting in the state shown in FIG. Although various embodiments have been described above, the present invention is not limited to these embodiments, and is not limited to FL3. However, it may be in the shape of a circular cut, and the shape may be arbitrary.Also, the outpost openings may be provided as many as the number of cursive characters, and the spacing between the openings may be F
A compression spring or a tension spring may be used as the biasing means. Receiving part, connecting body, extrusion 1.
The three members are all ``Pasaku,〕゛[Also, the three members are made separately.
1) Dimensions and shapes may be arbitrary. The engagement part of the extruded piece and the bow 1 hook Qi □ ke 2, and the relationship with the stepped part on the front of the main body can be done by engaging, engaging +i, , nkiso, :, so the setup is as follows: There is a thread 'V'.As for the method of providing the locking body on the extrusion I-2, various methods can be adopted, even though those shown in Example 1.Other design changes are free within the scope of the gist of the present invention. (Effects of the Invention) As explained above, according to the present invention, the following effects are achieved: (i) When writing, the main body can be held in a normal state, and the user can perform the desired operation with the wooden fingers. (1i) When all the cursive fonts are stored in the trunk, all the extruded pieces are placed in the main body of the part that does not get in the way of the fingers. It is on the outer periphery and is within reach by moving back one finger.
Moreover, you can get big strokes. ciio The mechanical pencil that accommodates the mechanical pencil moves forward and backward with the mechanical pencil at the center of the body, so the mechanical pencil does not tilt. (1v) While the mechanical pencil is locked in a writable state, the lead can be drawn out with one finger operation, and it is also possible to write in circular motions. *In addition, it is possible to write with the tip of the ballpoint pen protruding from the tip of the main body beyond the normal writing position, so it is convenient when writing with a ruler or the like. (V) Ballpoint pen glue fills can be easily replaced and mechanical pencil leads can be replenished.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing the first embodiment of the extrusion type composite writing implement of the present invention. A diagram showing the writable state selected and advanced, Figure 3 is a slope view showing the external appearance,
4 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 5 is a sectional view taken along the line V-V, FIG. 8 is a sectional view taken along the line ■-■ of FIG. 7, and FIGS. 9 and 10 are the third embodiment of the present invention. FIG. 9 is a cross-sectional view showing an example, and FIG. 9 is a diagram showing the built-in state of multiple military records;
FIG. 10 is a diagram showing a state in which the mechanical pencil is selected and moved forward in a writable state. DESCRIPTION OF SYMBOLS 1... Front part of the front shaft or main body, 1a... Opening part, 1b... Step part of the front shaft, IC... Rear end small diameter part of the front part of the main body, 2... Rear shaft, 2a ... Guide cylindrical body, 2
b, 2b, 2b, 2b...slit, 2c, 2
c. 2e, 2e... Guide grooves on the front outer periphery of the rear shaft, 2d, 2d. 2d, 2. d... Long groove on the inner surface of the rear shaft, 2e... Small diameter part at the front end of the rear shaft, 2f... Step part in front of the rear shaft, 3... Clip, 4... Tail plug, 5゜6, 7 .8...Ballpoint pen glue fill, 9.10. li, 12.27--receptacle, 9a, 10a, lla. 12a, 27a...Protrusion, 13°14. is, 1
6.29... Concatenated body, 17, is, 19, 20
, 30--Extruded pieces 17a, 18a, 19a. 20a=engaging portion, X7b. 1llb, 19b, 20
m3--Hooking part of extruded piece, 21.22.23,24
．． 28... Storage spring, 25... Mechanical pencil contents, 26... Internal mouthpiece, 29a... Connecting body arm, 30a... Low river knot of extruded piece, 30b...
...Slit of extruded piece, 3 pieces, locking body, 31a...
Hook portion of the locking body, 32... Bin, 33... Leaf spring,
34... Jack spring, 35... Core case. r%゛, I, 31N

Claims (1)

[Scope of Claims] 1. A main body provided with an opening at the front end through which the tip writing part of a cursive body appears, a plurality of cursive bodies housed in the main body, and a body that constantly urges the cursive bodies in a backward direction. a biasing means, a receiving part that supports the writing body in response to the biasing force in the backward direction by the biasing means and writing pressure applied during writing, a connecting body extending forward in communication with the receiving part; a push-out piece connected near the front end of the connecting body and arranged on the outer periphery of the main body in a part that does not get in the way of hands and fingers when the main body is gripped during writing, and one push-out piece that is selected while holding the main body during writing; A push-out type composite writing instrument, characterized in that the push-out type compound writing instrument is moved forward and backward with a finger, and is provided with means for a part of the push-out piece to engage with the front portion of the main body in a writable state in which the push-out piece is moved forward. 2. The push-out type composite writing instrument according to claim 1, wherein the connecting body connecting the receiving portion and the push-out piece extends forward along the outside of the main body. 3. The extrusion type composite according to claim 1, wherein the connecting body connecting the receiving part and the extrusion piece extends forward along the inside of the main body, and connects the front end portion with the extrusion piece through a slit provided in the main body. Writing implements. 4. The means for causing the part of the extrusion piece to engage with a part of the front part of the main body is such that while the extrusion piece is pushed in the radial direction with a finger, the extrusion piece engages with the part of the front part of the main body by component force. The extrusion type composite writing instrument according to any one of claims 1, 2 and 3. 5. The means by which the part of the push-out piece engages with the front part of the main body is such that the front part of the push-out piece is tilted in the radial direction and the hook part provided at the front end of the push-out piece engages with the front part of the main body. The extrusion type composite writing instrument according to any one of claims 1, 2, and 3, wherein 6. Claims 1 and 2, wherein the means for causing the part of the extrusion piece to engage with the front part of the main body is such that the extrusion piece engages with a part of the front part of the main body via a locking body provided on the extrusion piece. , 3. The extruded composite writing instrument according to any one of 3.