JP2607818Y2 - Knock-type writing instrument - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention A refill having a pen point at a tip is slidably installed in a barrel, and this refill is moved rearward by an elastic member provided in the barrel. A knock-type writing instrument which is urged and protrudes a pressing member interlocking with the refill from an opening at the rear end of the barrel, and presses the pressing member to cause the pen tip to protrude and retract from the opening at the tip of the barrel. Wherein the pressing member is protected from external force by the barrel, and
The present invention relates to a knock-type writing instrument provided with a shielding member for preventing the tip from protruding . 2. Description of the Related Art Knock-type writing instruments do not require a cap on the pen tip, and in order to perform writing, a pressing member provided at the rear end or side surface of the writing instrument main body for projecting and retracting a pen tip is provided. It is widely used because it is easy to use simply by operating an operation member such as a slide member. [0003] However, while the convenience of removing and attaching the cap is not required, the purpose of the pressing mechanism itself is to enable the operation with a simple operation. In some cases, the tip protruded. For example, when the writing instrument is stored in a pocket, a bag, or the like, there is a problem in that clothes and bags are stained. In order to prevent such an erroneous operation, a pressing member is covered with a shielding member detachably attached to a shaft cylinder such as a cap so that the pressing member cannot be touched. No. 23765. [0005] In the case where the pressing member is covered with a shielding member that can be attached to and detached from the shaft, the attaching and detaching of the shielding member is troublesome. The original advantage of the knock-type writing instrument was lost. In other words, the knock-type writing implement of the present invention can prevent erroneous operation of the pen tip appearing and retracting with a simple operation while maintaining the ease of use of the knock-type writing instrument. According to the present invention, a refill having a pen point at a tip is slidably installed in a barrel, and the refill is attached rearward by an elastic member provided in the barrel. A knock-type writing instrument that pushes the pen tip out of the opening at the tip of the barrel by pressing the pushing member, which pushes the pushing member in conjunction with the refill, from the opening at the rear end of the barrel. In the knock-type writing implement, a shielding member is attached to the shaft cylinder to protect the pressing member from external force and prevent erroneous pen tip projection, wherein the shielding member has a notch.
Attached to the barrel so as to be rotatable about its end.
Together and, prior to the position outside the Kijiku tube, and gist of knock-type writing instrument characterized by having a fitting portion between the pressing member. An embodiment will be described below with reference to an embodiment. FIG. 1 shows a knock-type writing instrument A according to the present invention. The knock-type writing instrument A basically includes a barrel 1, a refill 2, a cam 3, which is an extension locking mechanism, a pressing member 4, and an erroneous knock preventing member 5. The barrel 1 includes a front shaft 6 and a rear shaft 7,
Screw members 8 are press-fitted to the rear end of the front shaft 6 and the front end of the rear shaft 7, respectively. The screwing member 8 press-fitted to the rear shaft 7 has a stepped portion 9 formed by increasing the diameter at the rear portion, and this stepped portion 9 serves as a positioning portion of the cam 3 in the forward direction. Has become. A refill 2 housed in the barrel 1 so as to be movable back and forth has a pen tip 10 at the tip and houses ink inside. The refill 2 is urged rearward by a coil spring 11 that is an elastic body, protrudes from a rear end opening 12 of the barrel 1, and is interlocked with a pressing member 4 slidable back and forth via a cam 3. It is. That is, when the pressing member 4 is knocked once, the cam 3 and the refill 2
Moves forward, and the pen tip 10 protrudes from the distal end opening 13 of the barrel 1. The refill 2 attempts to return backward by the action of the coil spring 11, but the cam 3 works and the refill 2 is locked with the pen tip protruding. This is the writing state. To store the pen tip 10 in the barrel 1, if the pressing member is pressed again, the locking by the cam 3 is released,
The refill 2 moves backward by the action of the coil spring 11, and the pen tip 10 is also housed in the barrel 1. here,
The refill 2 includes a small diameter portion 2a and a large diameter portion 2b, and the coil spring 11 is engaged with a step 2c formed at a boundary between the small diameter portion 2a and the large diameter portion 2b. To reliably transmit the force of the spring 11 to the refill 2, a spring receiving member 14 is locked to the step 2c. The cam 3 is a member for positioning the refill 2 in accordance with the forward and backward movements thereof. The cam 3 engages with the groove in a cam cylinder 3a having large and small grooves formed in a general inner hole, and slides back and forth. A rotating cam (not shown) which is rotated by the rotation of the cam 3b and the sliding cam 3b and is locked by the cam barrel 3a is provided. In this example, the rear part 1 of the sliding cam 3b
6 protrudes from the rear end opening 12 of the rear shaft 7, and the crown 4 a is fitted to the protruding portion to form the pressing member 4. The distal end of the pressing member 4 is extended so as to interlock with the sliding cam. Is also good. Here, the sliding cam 3b is urged rearward by a coil spring 17, which is an elastic body, with the rear end of the cam cylinder 3a as a base end. The pressing member protrudes from the rear end opening 12 of the shaft cylinder 1 even in the state where it is locked by. At the rear of the rear shaft 7, a hole-shaped mounting portion 18 is provided.
Is formed, and an erroneous knock prevention member 5 which is a shielding member for the pressing member 4 is fitted to the mounting portion 18. The erroneous knock prevention member 5 has a shape in which a part of a ring-shaped member is cut out, and a fitting portion 19 for the pressing member 4 is formed as a large-diameter ball portion at a central portion thereof. The fitting to the rear shaft 7 is such that the mounting portion 18 of the rear shaft 7 is clamped by the notched end portion 20 in which a part of the ring shape is cut. Accordingly, the erroneous knock prevention member 5 is attached to the shaft cylinder 1 so as to be rotatable around the notch end 20. On the other hand, the pressing member 4 protruding from the rear end opening 12 of the shaft cylinder 1 has a fitting concave portion 4b with the erroneous knock preventing member 5 at the head thereof. When the fitting portion 19 of the erroneous knock prevention member 5 is located farthest from the barrel 1, it fits with the fitting recess 4 b of the pressing member 4. When the pressing member 4 is fitted to the erroneous knock prevention member 5, the pressing member 4 advances to the pen tip side as much as the fitting portion 19 of the erroneous knock prevention member 5 gets over the periphery of the fitting recess 4b. In this embodiment, in order to have a certain depth in the hole of the mounting portion 18, the barrel 7 is made up of the rear shaft body 7a and the tail crown 7b, and only the tail crown 7b is thick. A hole of the mounting portion 18 is formed as a member having a certain depth in a rear portion thereof. Further, a clip can be held between the rear shaft body 7a and the tail crown 7b. At this time, the clip is attached to the false knock prevention member 5.
When the erroneous knock prevention member 5 is fitted in the pressing member 4 and pierced into a pocket or the like of clothes, the erroneous knock prevention member 5
Is preferred because it is less likely to be affected. Another embodiment is shown in FIGS. still,
In the following examples, the same reference numerals are given to portions corresponding to the respective components of the components shown in FIG. FIG.
In the example shown in (1), the fitting portion 19 of the erroneous knock prevention member 5 is not formed as a large diameter portion, and the erroneous knock prevention member 5 is formed by forming a simple rod-like body into an annular shape with a part cut away. . On the other hand, the fitting concave portion 4b formed in the pressing member 4 is not a hole-shaped concave portion, but the side surface 4 of the pressing member 4.
It is formed as a groove penetrating to c.
Further, in this example, the protrusion 4d is formed at the end of the fitting concave portion 4b, so that the fitting with the erroneous knock prevention member 5 can be more reliably performed. FIG. 3 shows an erroneous knock prevention member 5.
2 is the same as that shown in FIG. 2 in that the fitting portion 19 is not formed as a large-diameter portion, and the erroneous knock prevention member 5 is formed as a mere rod-like body having a partially cut-out annular shape. It is. The difference is that the pressing member 4 of the false knock prevention member 5
The fitting portion to the pressing member 4 reaches only the side surface 4c of the pressing member 4, and the fitting recess 4b of the pressing member 4 is
The groove is formed as a groove reaching the center of the pressing member 4 formed in the circumferential direction. As a result, the rotation direction of the erroneous knock prevention member 5 is limited only to the direction in which the fitting concave portion 4b opens, and the fitting between the erroneous knock prevention member 5 and the pressing member 4 is unintended by an external force. Is prevented from being released. For example, when a clip is attached in the direction opposite to the opening direction of the fitting recess 4b, the fitting recess 4b faces inward (toward the human body) when stabbed in a pocket of clothes, and as a result, erroneous knocking occurs. Since the prevention member 5 is sandwiched between the pressing member 4 and the human body, the function of preventing erroneous knock can be more reliably performed. FIG. 4 shows still another embodiment. An annular member which is formed such that the erroneous knock prevention member 5 comprises a fitting member 21 for the pressing member 4 and a rod-shaped support member 22 for connecting the fitting member 21 to the barrel 1, and is rotatable with respect to the barrel 1. The support member 22 is fitted to the annular member 23. A center hole 24 is formed in the fitting member 21.
Is formed so that the center hole, 24 and the pressing member 4 are fitted to each other. As shown in the main part sectional view of FIG. 4 shown in FIG. 5, in this example, the pressing member 4 and the fitting member 21 of the erroneous knock prevention member 5 are fitted by screwing. A fitting projection or the like may be formed in each of the hole 24 and the pressing member 5 to fit over the fitting. In addition to the above, various modifications can be made without departing from the gist of the present invention. To give an example, the barrel 1,
The material of each member such as the refill 2, the cam 3 serving as the feeding locking mechanism, the pressing member 4, and the erroneous knock prevention member 5 is as follows.
Synthetic resin, metal, wood, etc. can be used.
A combination of more than one kind may be used. In addition, although the pen tip is illustrated with a ball pen in mind as a writing instrument, other examples include a fiber pen tip, a small tube pen tip, a sharp pencil, a fountain pen tip, and a synthetic resin pen tip having a communication hole. Can be illustrated. The ink stored in the refill 2 may be in a so-called raw ink state in which the ink is stored in the ink tank as it is, or may be in a state of being penetrated and held in a batting or the like. As described above, according to the present invention, a refill having a pen point at the tip is slidably installed in a barrel, and the refill is urged rearward by an elastic member provided in the barrel. A knock-type writing instrument that protrudes a pressing member interlocking with refill from an opening at a rear end of a barrel, and presses the pressing member to cause the pen tip to protrude and retract from an opening at a tip of the barrel. In a knock-type writing instrument, a shielding member for protecting the pressing member from external force on the barrel and preventing erroneous pen tip projection is attached, wherein the shielding member has a notched end.
Is attached to the barrel so as to be rotatable about a portion.
Rutotomoni, before position outside the Kijiku tube, because it has a fitting portion between the pressing member, while it is keeping the usability of the knock-type writing instrument, minimizing the erroneous operation of the pen projecting a simple operation Is what you do.

[Brief description of the drawings] FIG. 1 is a sectional view of a main part showing an embodiment. FIG. 2 is an external view of a main part showing another embodiment. FIG. 3 is an external view of a main part showing another embodiment. FIG. 4 is an external view of a main part showing another embodiment. FIG. 5 is a sectional view of a main part of the example of FIG. 4; [Explanation of symbols] A Knock type writing instrument 1 shaft cylinder 2 Refill 2a Small diameter part 2b Large diameter part 2c step 3 cams 3a Cam cylinder 3b Sliding cam 4 Pressing member 4a cap 4b fitting recess 4c side view 4d protrusion 5 Misknock prevention member 6 Front axis 7 Rear shaft 7a Rear shaft body 7b tail crown 8 Screw member 9 steps 10 pen tip 11 Coil spring 12 Rear end opening 13 Tip opening 14 Spring receiving member 16 Rear 17 Coil spring 18 Mounting part 19 Fitting part 20 Notch end 21 Fitting member 22 rod-shaped support 23 Ring member 24 center hole

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B43K 24/02

Claims (1)

(57) [Claims for registering utility models] 1. A refill having a pen point at the tip is slidably installed in a barrel, and the refill is attached rearward by an elastic member provided in the barrel. A knock-type writing instrument that pushes the pen tip out of the opening at the tip of the barrel by pressing the pushing member, which pushes the pushing member in conjunction with the refill, from the opening at the rear end of the barrel. In the knock-type writing instrument, a shielding member that protects the pressing member from external force on the barrel and prevents erroneous pen tip projection is attached, the shielding member is rotatable around a notch end.
Together are attached to the barrel in Noh, outside the position before Kijiku cylinder, knock-type writing instrument characterized by having a fitting portion between the pressing member.