JPH0657689U - Rotary feeding type writing instrument - Google Patents

Abstract

(57) [Abstract] [Purpose] The rotation feeling when rotating the rear shaft with respect to the front shaft to retract the pen body is good, and there is no rattling of the pen body during writing, and it is rich in luxury. A rotary feeding type writing instrument is provided. [Composition] When the rear shaft 2 is rotated with respect to the front shaft 1, the refill 3 housed in the front shaft 1 is moved back and forth, and the pen body 31 at the tip of the refill is moved from the front shaft 1 or the front end opening 12 of the front opening 11. In the protruding and retracting rotary writing instrument, an O-ring 9 made of a soft elastic material and slidably contacting the outer peripheral surface of the tip portion of the refill 3 which moves back and forth is provided inside the tip 1 of the front shaft 1 or the front opening 11 near the tip opening 12. To do.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary feeding type writing instrument in which a pen body projects and retracts from a front opening of a front opening attached to the front shaft or the front shaft when the rear shaft is rotated with respect to the front shaft.

[0002]

[Prior art]

 In the rotary feeding type writing instrument, the cam cylinder is fixed in the rear shaft and the cylinder is fixed in the front shaft, and the cam cylinder and the cylinder are rotatably connected. That is, the rear shaft and the front shaft are rotatably connected. Then, when the rear shaft is rotated with respect to the front shaft, the cam cylinder moves the actuator back and forth, and it is housed in the front shaft in a state of being repulsed in the rear shaft direction and the tail end abuts the actuator. The refill is moved back and forth, and the pen body at the tip of the refill comes in and out from the front end of the front shaft or the front end attached to the end of the front shaft.

[0003]

[Problems to be solved by the device]

 By the way, the rotary feeding type writing instrument is often a high-grade product because it has more parts than knock-type writing instruments. . In addition, a high-quality rotary feeding type writing instrument is required to have a good feeling of rotation as a high-class feeling and to have a good writing feeling without rattling of the pen body during writing.

However, in such a rotary feeding type writing instrument, when the rear shaft is rotated with respect to the front shaft, the tip of the refill that moves back and forth appears and disappears at the tip opening of the front port attached to the front shaft or the front shaft. Since a clearance is provided between the outer peripheral surface and the inner peripheral surface of the tip opening, the outer peripheral surface of the refill does not come into contact with the inner peripheral surface of the tip opening or partially comes into contact when the refill moves back and forth. Therefore, the rotation resistance is not constant and the rotation feeling is not good. In addition, when the pen body comes into contact with the writing surface during writing, the clearance causes the pen body to rattle, which makes it difficult to obtain a good writing feeling.

In view of the above, the present invention has a good rotation feeling when the pen shaft is projected and retracted by rotating the rear shaft with respect to the front shaft, and there is no rattling of the pen body during writing, which provides a high-quality rotation. The purpose is to provide a pay-out type writing instrument.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, according to the present invention, when the rear shaft is rotated with respect to the front shaft, the refill housed in the front shaft moves back and forth, and the pen body at the tip of the refill is moved to the front shaft or the front end opening of the front port. In the rotary feeding type writing instrument which appears and disappears from the front, an O-ring made of a soft elastic material is provided inside the front shaft or near the tip opening of the front opening so as to slidably contact the outer peripheral surface of the tip portion of the refill that moves back and forth.

[0007]

[Action]

 That is, an O-ring made of a soft elastic material is disposed inside the front shaft or in the vicinity of the tip opening of the front opening, and the O-ring slides on the outer peripheral surface of the tip portion of the refill that moves back and forth to form the tip portion of the refill. Does not come into partial contact with the inner peripheral surface of the tip opening, the sliding resistance during forward and backward movement becomes constant, and a good rotational feeling can be obtained. Since there is no clearance between the O-ring and the refill, and the tip of the refill is held by the O-ring, there is no rattling of the pen when writing, and a good writing feeling can be obtained.

[0008]

【Example】

 The present invention will be described in detail below with reference to the embodiments shown in the drawings. In FIG. 1, a front opening 11 having a front end opening 12 is screwed to the front end of the front shaft 1. A connecting cylinder 7 is fixed to the tail end of the front shaft 1, and a cylinder 6 having two slits 62 is press-fitted into the connecting cylinder 7. That is, the cylinder 6 is fixed to the front shaft 1 via the connecting cylinder 7.

The actuator 5 is housed in the cylinder 6, and the actuator 5 moves back and forth in the cylinder 6 with the vertical projection 51 of the actuator 5 fitted in the slit 62. A refill 3 of, for example, a ballpoint pen is accommodated in the front shaft 1 and is springed toward the tail end side by a spring 32. An O-ring 9 is arranged in the front shaft 1 near the tip opening 12. The O-ring 9 is made of a soft elastic material, and the inner diameter in its natural state is slightly smaller than the outer diameter of the refill 3, but the refill 3 is inserted into the O-ring 9.

The tail end of the refill 3 is in contact with the operator 5, and when the operator 5 moves forward, the tip of the refill 3 also moves forward while sliding in contact with the O-ring 9, and the pen body at the tip of the refill 3 31 The pen tip 31 projects into the tip opening 11 when the actuator 5 moves backward and the refill 3 also slides back against the O-ring 9 due to the elastic force of the spring 32. It is designed to immerse you in. In other words, the tip portion of the reel 3 slides only on the O-ring 9 and moves back and forth without partially contacting the inner peripheral surface of the front opening 11.

A clip 21 is fixed to the rear shaft 2 with a fixing bolt 22. The cam barrel 4 is screwed onto the fixing bolt 22. That is, the cam barrel 4 is fixed to the rear shaft 2. When the tip edge of the cam shaft 4 is expanded, it is a slanting cam 41, and the cam 41 abuts the actuator 5 that is repulsed by the spring 32 toward the tail end. Therefore, when the cam barrel 4 rotates in the forward and reverse directions, the actuator 5 moves back and forth. The cylinder 6 and the cam cylinder 4 are rotatably connected. That is, the front shaft 1 and the rear shaft 2 are rotatably connected.

Therefore, when writing, the rear shaft 2 is rotated in a predetermined direction with respect to the front shaft 1 from the state shown on the left side of the center line in FIG. As a result, the cam cylinder 4 rotates, and as shown on the right side of the center line in FIG. 1, the actuator 5 advances to advance the refill 3, and the pen body 31 at the tip of the reference 3 opens the tip opening 12 of the tip 11. It becomes possible to write by protruding from. When the writing is completed, the rear shaft 2 may be rotated in the opposite direction to the front shaft 1, whereby the pen body 31 is retracted into the front opening 11 and the state shown on the left side of the center line in FIG. Return to.

Here, when the refill 3 moves back and forth, the refill 3 moves by sliding only on the O-ring 9, so that the sliding resistance becomes constant and the rear shaft 2 rotates smoothly with respect to the front shaft 1. It is possible to obtain a good rotational feeling. Further, since the tip portion of the refill 3 is held by the O-ring 9, even if the pen body 31 comes into contact with the writing surface at the time of writing, rattling does not occur, and an excellent writing feeling is obtained and a high-class feeling is obtained. It can be a rich writing instrument.

[0014]

[Effect of device]

 As described above, the rotary feeding type writing instrument of the present invention has an O-ring, which is made of a soft elastic material and is slidably contacted with the outer peripheral surface of the refill that moves back and forth, inside the front shaft or near the tip opening of the front opening. Since it is arranged, the rotation feeling when rotating the rear shaft with respect to the front shaft to project and retract the pen body is good, and the rattling of the pen body does not occur during writing, and the rotation is rich in feeling. It can be a pay-out type writing instrument.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 1 front shaft 11 front port 12 tip opening 2 rear shaft 3 refill 31 pen body 32 spring 4 cam barrel 41 cam 5 actuator 6 cylinder 7 connecting barrel 9 O-ring

Claims (1)

[Scope of utility model registration request] 1. A rotary feeding type writing instrument in which when a rear shaft is rotated with respect to the front shaft, a refill housed in the front shaft moves back and forth, and a pen body at the tip of the refill is projected and retracted from the front shaft or the front end opening of the front opening. In the inside of the front shaft or the vicinity of the front end opening of the front opening, an O-ring made of a soft elastic material and slidably contacting the outer peripheral surface of the front end portion of the refill that moves back and forth is disposed. Writing instrument.