JPH0582585U - Writing instrument - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a writing instrument capable of securely attaching or holding a tip or a refill even when a shaft cylinder is formed of a material that is difficult to process, such as glass or pottery. [Structure] A front opening 1, a cylindrical fixture 2 connected to the front opening 1, having a locking step 21 inside, an O-ring 5 wound around an outer peripheral surface, and a tail end side by a spring 4. A locking projection 32 that is elastically formed on the outer periphery is engaged with the locking step 21 of the fixture 2, and the pen body 31 is the tip opening 1 of the front opening 1.
The refill 3 protruding from 1 and the shaft cylinder 1 made of a difficult-to-process material such as glass or pottery and press-fitted and fixed to the outer periphery of the fixture 2 via the O-ring 5 to fix the refill 3 While being held by the tool 2, the O-ring 5 absorbs the variation in the inner diameter of the shaft cylinder 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a writing instrument whose barrel is made of a material that is difficult to process, such as glass or pottery.

[0002]

[Prior Art]

 In a writing instrument with a built-in refill, for example, a ballpoint pen, a ballpoint pen refill is arranged in a barrel, and a ballpoint pen body at the tip of the refill projects from a front end opening of a front end connected to the barrel. Then, in order to hold the refill, the refill is spring-loaded to the tail end side by a spring, and the rear end face of the refill is received by a step portion formed inside the barrel or is held in a holding hole formed inside the barrel. The rear end of the refill is pressed in.

By the way, the barrel of the writing instrument is usually formed of metal or synthetic resin, but since the writing instrument is a product in which the design element is important, the barrel is formed of glass or pottery. Some of them have been put into practical use to give them an appearance and texture different from those of writing instruments.

[0004]

[Problems to be solved by the device]

 However, materials such as glass and ceramics are more difficult to process than metals and synthetic resins, and it is particularly difficult to accurately measure the internal shape of the shaft cylinder when it is molded. For this reason, there is a problem that it is difficult to attach a tip to the tip of a barrel formed of a material such as glass or earthenware and to hold the refill by utilizing the internal shape of the barrel.

Therefore, the present invention is to provide a writing instrument capable of securely attaching and holding the tip and the refill even when the shaft cylinder is formed of a material that is difficult to process, such as glass or pottery. To aim.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, the writing instrument of the present invention comprises a tip, a cylindrical fastener connected to the tip, having a locking step inside, and having an O-ring wound around the outer peripheral surface thereof. A locking projection that is spring-backed by the spring and is formed on the outer periphery engages with the locking step of the fixture, and the pen body projects from the tip opening of the tip, and glass and pottery like The shaft cylinder is made of a material that is difficult to process and is press-fitted and fixed to the outer periphery of the fixture via the O-ring.

[0007]

[Action]

 That is, since a fixture is connected to the front port and the refill is held by the fixture, dimensional accuracy of the internal shape of the barrel is not required, and materials that are difficult to process such as glass and pottery can be used. Further, since the shaft cylinder is press-fitted and fixed to the outer periphery of the fixture through the O-ring, even if the inner diameter of the shaft cylinder varies, it can be securely fixed to the fixture, and the tip and the shaft cylinder are connected. It

[0008]

【Example】

 The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows an example in which the present invention is provided to a ballpoint pen. In FIG. 1, an opening 11 is formed at the tip of a front opening 1 and a vertical rib 12 is formed inside. The fixture 2 is a tubular body formed of metal such as brass, and is screwed to the front opening 1 in a freely attachable / detachable manner. An inward locking step 21 is formed at the rear end of the fixture 2, two annular grooves 22 are formed on the outer peripheral surface, and the O-ring 5 made of a soft elastic material is formed in the annular groove 22. It is fitted with a part exposed.

The refill 3 is a normal ballpoint pen refill in which an oil-based ink is filled inside and a ballpoint pen body 31 is attached to the tip. Further, the refill 3 is crushed into a flat shape in the middle abdomen thereof to form a locking protrusion 32. The refill 3 is not limited to the ballpoint pen refill, and may be a refill to which a fiber pen, a plastic pen or the like is attached.

The refill 3 is arranged in the front opening 1 and the fixing tool 2, and the pen body 31 projects from the tip opening 11 of the front opening 1, but is between the locking projection 32 and the vertical rib 12 of the front opening 1. A spring 4 is inserted between the refill 3 and the refill 3 to the tail end side. Therefore, the locking projection 32 of the refill 3 is held in abutment with the locking step 21 of the fixture 2. Also, the refill 3 can be replaced by releasing the screwing of the front opening 1 and the fixture 2.

The shaft cylinder 6 is made of a material that is difficult to process, such as glass or earthenware, and gives a texture different from that of a conventional writing instrument. The shaft cylinder 6 is press-fitted into the fixture 2, but since the O-ring 5 is exposed on the outer peripheral surface of the fixture 2, the O-ring 5 absorbs the variation in the inner diameter dimension of the shaft cylinder 6 to ensure the reliability. It is fixed to.

As described above, since the fixing tool 2 is screwed to the front opening 1 and the fixing step 2 receives the locking step 32 of the refill 3, the refill 3 can be held regardless of the shaft cylinder 6. Therefore, the dimensional accuracy of the inner shape of the barrel 6 is not required, and a material that is difficult to process, such as glass or pottery, can be used. Further, since the shaft cylinder 6 is press-fitted and fixed to the outer circumference of the fixture 2 via the O-ring 5, the shaft cylinder 6 can be reliably fixed to the fixture 2 even if the inner diameter of the shaft cylinder varies.

[0013]

[Effect of the device]

 As described above, according to the present invention, even when the shaft cylinder is formed of a material that is difficult to process, such as glass or pottery, the tip is securely attached to the shaft cylinder and the refill is also securely retained. It can be a writing instrument that can.

[Brief description of drawings]

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

[Explanation of symbols]

 1 Tip Port 11 Tip Opening of Tip Port 2 Fixing Tool 21 Locking Step of Fixing Tool 3 Refill 31 Pen Body 32 Locking Protrusion 4 Spring 5 O Ring 6 Shaft Tube

Claims (1)

[Scope of utility model registration request] 1. A front opening, a cylindrical fixing member connected to the front opening, having a locking step inside, and having an O-ring wound around the outer peripheral surface thereof, and springed to the tail end side by a spring. The locking protrusion formed on the outer periphery engages with the locking step of the fixture, and the pen body is made of a material that is difficult to process, such as glass or pottery,
A writing instrument comprising a shaft cylinder press-fitted and fixed to the outer periphery of the fixture via the O-ring.