JPH023911Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a ballpoint pen.

Conventional methods for storing the tip of a ballpoint pen include: placing the tip of the cap on the cap with the tip protruding from the barrel, pressing the button or the like and letting it retract into the barrel using a restoring spring, etc. There is one in which the barrel is rotated and inserted into the barrel using a cam or the like. These devices are cumbersome in that they require the use of both hands or the need to change hands when operating them.

The object of the present invention is to provide a ballpoint pen whose lead tip can be easily stored while writing without requiring changing hands.

The present invention includes a shaft tube having a tip opening through which a cap (to be described later) can pass through, and a shaft tube having a window hole on a side surface through which a push spring (to be described later) and a push button of the cap (to be described later) extend;
It has a refiel fixed in the barrel with the tip part protruding a required length from the tip opening of the barrel, and a tip opening through which the core tip of the refiel can pass, and the rear end has elasticity in the radial direction. A cap is provided with a push button, and the refill tip is housed in the inner hole of the cap, which is slidably slidable in the axial direction within the barrel. A spring body that advances the tip of the re-feel located at the tip of the reel to a retracted position, and an operating portion that is exposed through the window hole of the barrel and engages the cap to press the cap and move the tip of the re-feel from the cap tip opening. and a push spring that protrudes and causes the push button of the cap to retract to a position where it reaches another window hole in the barrel, thereby achieving its purpose.

The illustrated embodiment will be described below.

First, the shaft cylinder 1 consists of a front shaft 2 and a rear shaft 3 which is screwed onto the front shaft 2.The front shaft 2 has a tip opening 4 through which a cap (described later) can pass, and a push spring (also described later) is inserted on the side surface. A window hole 5 through which the cap is exposed and a window hole 5' through which the push button of the cap extends are provided.

Next, with the refill 6 projecting its tip 7 in front of the tip opening 4 of the barrel 1 by a distance that does not interfere with writing, the rear end of the refill 6 is press-fitted into the small diameter inner hole 8 of the rear barrel 3 and fixed. are doing. In addition, a pipe-shaped body part 10 has a tip opening 9 at its tip through which the core tip 7 of the refill can pass, and its rear end extends rearward from the upper edge and has elasticity in the radial direction to constantly press the inner surface of the shaft cylinder. A cap 12 having a push button 11 is mounted so as to cover the outer periphery of the tip of the refill 6 and to be slidable in the axial direction within the shaft cylinder. A coil spring 13 is interposed between the rear end of the cap 12 and the front end of the rear shaft 3 to press the cap 12 forward. This allows the cap 12 to move forward to a position where the tip protrudes forward from the tip opening 4 and the core tip 7 of the refill is inserted into the tip opening 9 (see FIG. 3).
A bulging operating portion 15 of a push spring 14 is exposed through the window hole 5 of the front shaft 2. The push spring 14 has its front end abutted against the inner step 16 of the tip shaft, and its rear end abuts against the cap 1.
It abuts against the outer step portion 17 of No. 2. Therefore, when the operating portion 15 of the push spring 14 is pushed inward, the push spring 14
is extended and its rear end presses against the external step 17 of the cap, compressing the coil spring 13 and retracting the cap. Due to the retreat of the cap 12, the core tip 7 of the re-reel is relatively moved from the tip opening 9 of the cap 12.
is projected and becomes ready for writing (see Figure 1). In this state, the push button 11 at the rear end of the cap reaches the position of the window hole 5' of the tip shaft 2 and is fitted into the window hole 5' by its elastic force, thereby locking and fixing the writing state.

A flat notch 18 for preventing rotation is formed on the side surface of the cap body 10, and a corresponding flat notch 19 is formed on the inner surface of the tip shaft, so that the cap 12 can press the push button 11 without shifting in the circumferential direction. The axial position of the window hole 5' is made to coincide with that of the window hole 5'.

Next, when writing is completed and the lead tip portion 7 is to be stored, it is sufficient to simply press the push button 11. There is a tapered part 20 on the front edge of the push button 11 that is hooked on the edge of the window hole 5'.
is formed to facilitate insertion of the push button 11. When the push button 11 is removed from the window hole 5', the restoring force of the coil spring 13 causes the cap 12 to move to the third position described above.
Return to the state shown in the figure and store the lead tip 7 in the cap.

The present invention is constructed as described above, and when storing the tip of the lead, there is no need to use both hands or change hands, and the task can be accomplished simply by pressing the tip with the fingers while holding it in the writing state. It has extremely practical and convenient effects.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is an overall perspective view of the tip of the cap in a protruding state, Fig. 2 is a perspective view of the cap, Fig. 3 is a longitudinal cross-sectional view of the tip of the cap in a retracted state, and FIG. 4 is a cross-sectional view taken along line A--A in FIG. 3. 1... shaft cylinder, 2... front shaft, 3... rear shaft, 4...
Tip opening, 5, 5'... Window hole, 6... Refill,
7... Core tip, 8... Rear shaft inner hole small diameter part, 9...
Tip opening, 10...Body part, 11...Push button, 12...
...Cap, 13...Coil spring, 14...
...Press spring, 15...Operation unit, 16...Inner surface stepped portion of the tip shaft, 17...Outer surface stepped portion of the cap, 18...Planar cutout for preventing rotation, 19...Plane portion, 20...
Tapered part of push button.

Claims (1)

[Scope of utility model registration request] A shaft cylinder is required, which has a tip opening through which the cap (described later) can pass through, and a window hole is provided on the side surface through which a push spring and a push button of the cap (described later) extend, and a core tip portion is required from the tip opening of the shaft cylinder. The re-feel is fixed in the shaft cylinder with its length protruding, and has a tip opening through which the core of the re-feel can pass, and a push button having radial elasticity is provided at the rear end, and the re-feel is inserted into the inner hole of the push button having elasticity in the radial direction. A cap that accommodates the tip and is installed so that it can freely slide in the axial direction inside the barrel, and a position where the cap is pushed forward and the tip is inserted into the re-feel core tip located in front of the tip of the barrel. The spring body and the operating part are exposed through the window hole of the barrel, which engages the cap, and presses the cap so that the tip of the re-feel protrudes from the tip of the cap and the push button of the cap is pushed out of the barrel. A ballpoint pen consisting of a push spring that moves the pen back until it reaches the window hole of the pen.