JPH0591883U - Writing instrument cap device - Google Patents

Abstract

(57) [Abstract] [Purpose] A ball-point pen, mechanical pencil, brush (EN) Provided is a highly practical writing instrument cap device that has a simple structure and can be manufactured at low cost by improving portability, safety, durability, etc. [Structure] A locking portion made of a male screw is provided on an outer peripheral wall of a barrel of a writing instrument. A tubular body having a locked portion that is locked to the locking portion is inserted on the outer peripheral wall of the shaft cylinder so as to be movable back and forth. When the locked part is locked to the locking part, the writing part is sunk into the inside of the cylindrical body, and the locking part is released to move to the rear of the outer peripheral wall of the shaft cylinder, so that the writing part moves to the cylindrical part. It is configured to be exposed from the opening at the tip of the body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, when the locked portion of the cylindrical body inserted on the outer peripheral wall of the shaft cylinder is locked to the locking portion provided on the shaft cylinder so as to be able to move back and forth on the outer peripheral wall of the shaft cylinder. , As the writing part attached to the barrel moves into the inside of the barrel and the unlocked barrel moves to the rear of the outer wall of the barrel, the writing part moves to the tip of the barrel. The present invention relates to a cap device for a writing instrument that is exposed from an opening.

[0002]

[Prior Art]

 Conventionally, writing instruments have an opening at one end and the other end is sealed. The opening of the cylinder is inserted into the tip of the barrel when not in use and removed when not in use to remove the rear end of the barrel. Caps that can be replaced are common and widely used.

In the ballpoint pen, a knock mechanism type capless type in which a shaft cylinder having a normally open tip has a cap function has been widely spread due to improvement in manufacturing technology, improvement in ink, and the like. The conventional ballpoint pen with a cap, which has a simple structure and can be manufactured at low cost, is also widely used.

Most mechanical pencils are capless.

[0005]

[Problems to be solved by the device]

 In the capless knock mechanism type ball-point pen and mechanical pencil described in the prior art, there is a problem in safety if the tip of the barrel is formed with an acute angle to make it easier to write letters, etc. When making the obtuse angle into consideration, it becomes difficult to write letters, etc., and there was a problem in achieving both safety and ease of writing in the shape of the tip of the barrel.

Further, in the conventional capless knock mechanism type ballpoint pen and mechanical pencil, the knock portion may be erroneously pushed and the writing portion may be carried while being exposed from the tip of the barrel. There were problems such as soiling and damaging clothes.

In addition, in many conventional ballpoint pens with a cap, a clip is attached to the cap, and the writing part faces upward when being carried in a chest pocket, etc. There is a problem that ink leakage from the rear end of the ink storage chamber is likely to occur.

[0008] In mechanical pencils, if a conventional cap is attached, it will be difficult to handle the removed cap, so most of them are capless types, and the tip of the barrel that requires the most protection. There is a problem that the core holding tube of the core feeding mechanism protruding from the part is easily damaged, and the protruding core holding tube causes anxiety about safety when carrying.

Therefore, the present invention has been made in view of the above problems, and its purpose is to move the front and back of the outer peripheral wall of the barrel without changing the mechanism of the conventional writing instrument. By making the cylinder inserted so that it moves so as to function as a cap, portability and functionality are improved for ball-point pens, and safety and durability are improved for mechanical pencils. An object is to provide a cap device for a high writing instrument.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, a cap device for a writing instrument according to the present invention includes a shaft cylinder having an outer peripheral wall provided with a locking portion, and the cap device is inserted on the outer peripheral wall of the shaft cylinder and locked to the locking portion of the shaft cylinder. The inner peripheral wall in front of the locked portion is configured to be movable back and forth in the axial direction on the outer peripheral wall including the locking portion of the shaft cylinder. It is composed of a tubular body formed in a tubular shape so that it can move back and forth on the outer peripheral wall behind the locking portion. The tip of the barrel and the writing part attached to the barrel are set to sink into the barrel, and the unlocked barrel moves to the rear of the outer wall of the barrel. The tip portion and the writing portion of the tube are exposed from the tip opening portion of the tube body.

[0011]

[Action]

 The cylindrical body unlocked by the locking portion of the shaft cylinder is moved to the rear of the outer peripheral wall of the shaft cylinder, and the tip portion and the writing portion of the shaft cylinder are exposed from the tip opening portion of the cylinder body. When using, that is, when writing, for example, a clip with one end fixed to the rear end of the barrel, the holding part of the holding end formed to spring toward the center of the barrel, and the outer peripheral wall of the barrel. When not in use, the cylinder body that is to be stopped behind the outer peripheral wall of the shaft cylinder by pushing the cylinder body between After releasing the clamp from the clamp and moving it further toward the front of the barrel, when the locked part provided on the barrel is locked to the locking part provided on the barrel, the tip of the barrel is inserted inside the barrel. Since the part and the writing part attached to the barrel are immersed, the cylinder serves as a cap.

[0012]

【Example】

 Examples will be described with reference to the drawings. In FIGS. 1 and 2, a writing portion 3 is attached to the tip of the barrel 1, and a male screw is provided on a part of the outer peripheral wall of the barrel 1 so as to extend outward in the circumferential direction. The male screw serves as a locking portion 1a capable of locking a locked portion 2b provided on the cylindrical body 2 described later.

In FIGS. 1 and 2, the cylindrical body 2 inserted from the rear end of the cylindrical cylinder 1 onto the outer peripheral wall of the cylindrical cylinder 1 is made of plastic such as vinyl chloride resin, and is formed by molding. Is formed into a tubular shape. More specifically, a thick portion 2a that extends outward in the circumferential direction is provided at the rear portion of the inner peripheral wall of the tubular body 2. The inner peripheral wall of the tubular body 1 in front of the thick portion 2a is the axial cylinder. It has an inner diameter such that it can be moved back and forth in the axial direction on the outer peripheral wall including the one locking portion 1a. Further, the thick portion 2a is provided with a female screw that extends inward in the circumferential direction so as to be locked by the male screw that is the locking portion 1a of the shaft cylinder 1, and is used as the locked portion 2b. At the same time, the locked portion 2b can be moved back and forth on the outer peripheral wall behind the locking portion 1a of the barrel 1.

When the male screw, which is the locking portion 1a of the shaft cylinder 1, is locked with the female screw, which is the locked portion 2b of the cylinder body 2, the front end of the shaft cylinder 1 and the shaft cylinder 1 are attached. As the writing part 3 and the writing part 3 immerse in the inner part of the cylindrical body 2, and the unlocked cylindrical body 2 moves to the rear of the outer peripheral wall of the shaft cylinder 1, the tip end opening part of the cylindrical body 2 The length from the locked portion 2b of the barrel 2 to the tip opening 2c is such that the writing portion 3 and the tip of the barrel 1 are exposed from the portion 2c. In consideration of the position of the stopper 1a and the length of the barrel 1, it is formed to be longer than the length from the locking portion 1a of the barrel 1 to the tip of the writing part 3 attached to the barrel 1. In addition, in the knock-type writing instrument, when the writing portion 3 projects from the tip of the barrel 1, it is longer than the length from the locking portion 1a of the barrel 1 to the tip of the writing part 3. It is formed so that

The tubular body 2 that has moved to the rear of the outer peripheral wall of the barrel 1 after the locking portion 1a is unlocked is attached, for example, so that one end is fixed to the rear end of the barrel 1. In addition, the clip 4 is inserted by pressing in the axial direction between the pinching portion 4b of the pinching end 4a formed so as to be always elastically directed toward the center of the barrel and the outer peripheral wall of the barrel 1. The elastic force of the clip-on end 4a of the clip 4 causes the clip 2 to be held between the clip 4 and the outer peripheral wall of the barrel 1 so that the cylinder 2 does not interfere with writing during use. In addition, by pressing the cylindrical body 2 toward the front of the outer peripheral wall of the shaft cylinder 1 when not in use, the clip 4 can be easily released from being held.

[0016]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects.

By applying the cap device for a writing instrument according to claim 1 to a conventional ball-point pen with a cap, it is possible to perform an operation with one hand, save the trouble of replacing the cap, and prevent the cap from being lost.

By applying the cap device for a writing instrument according to claim 1 to a conventional ball-point pen with a cap, the writing part faces downward when being carried by being held by a clip in a chest pocket or the like. It is possible to prevent stains on clothes due to ink leakage from the ink and breaks in ink during writing.

By applying the cap device for a writing instrument according to claim 1 to a knock mechanism type ball-point pen or mechanical pencil, even if the writing part is accidentally pushed from the tip of the barrel when the writing part is pushed by mistake when carrying the clothes, No stain or damage.

By applying the cap device of the writing instrument according to claim 1 to the mechanical pencil, the core holding tube attached to the tip portion of the barrel can be protected, so that the durability can be enhanced and the tip portion of the barrel can be carried. It is possible to remove the feeling of anxiety from the sharp shape of.

By applying the cap device of the writing instrument according to the first aspect to the ballpoint pen and the mechanical pencil, the shape of the tip end of the barrel can be formed into the shape in which characters and the like can be written most easily without being concerned about safety.

By applying the cap device of the writing instrument according to the first aspect to the writing brush, it is possible to protect the side surface portion of the spike that was easily damaged by the conventional cap.

The present invention can be applied without changing the mechanism of a conventional writing instrument, can be easily manufactured, and can provide a highly practical and inexpensive writing instrument.

[0024]

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a writing instrument with a cylinder locked to a barrel.

FIG. 2 is a cross-sectional view of the writing instrument in a state where the tubular body in which the locking portion of the barrel is unlocked moves to the rear of the barrel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft cylinder 1a Locking part 2 Cylindrical body 2a Thick part 2b Locked part 2c Tip opening part 3 Writing part 4 Clip 4a Clamping end part 4b Clamping part

Claims (1)

[Scope of utility model registration request] 1. A shaft cylinder (1) having a locking part (1a) on an outer peripheral wall, and a locking part (1a) of the shaft cylinder (1) inserted into the outer peripheral wall of the shaft cylinder (1). Locked part (2b)
And the inner peripheral wall in front of the locked portion (2b) is allowed to move back and forth in the axial direction on the outer peripheral wall including the locking portion (1a) of the barrel (1). 2b) is a tubular body (2) formed in a tubular shape so as to be able to move back and forth on the outer peripheral wall behind the locking portion (1a) of the shaft tube (1). When the locking part (2b) is locked to the locking part (1a) of the barrel (1), the tip of the barrel (1) and the writing part (3) attached to the barrel (1) are separated. The distal end of the barrel (1) is moved as the unlocked barrel (2) is moved to the rear of the outer peripheral wall of the barrel (1) so as to be immersed in the barrel (2). A writing instrument cap device, characterized in that the writing section (3) and the writing section (3) are exposed from the tip opening (2c) of the tubular body (2).