JP3095982B2 - Rotating writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revolving writing tool in which a writing tool of a built-in refill is protruded and retracted from a front end opening of a front shaft when a rear shaft is rotated forward and backward with respect to a front shaft.

[0002]

2. Description of the Related Art An example of the configuration of such a rotary feeding type writing instrument will be described with reference to FIG. A rear shaft 1 and a front shaft 2 are rotatably connected, and a refill 8 of, for example, a ballpoint pen is provided therein.
Is arranged. The refill 8 is repelled in the direction of the rear shaft 1 by a spring (not shown), and its tail end surface is in contact with the actuator 6 arranged to be able to move back and forth in the cylinder 71. The cylinder 71 is connected to a threaded joint 72,
Is screwed to the front shaft 2.

When attaching a clip to a rear shaft or a cap, an opening is provided at the tail end of the rear shaft or the cap, and a cap that also serves as a clip mounting screw is screwed into the opening to fix the clip to the rear shaft or the cap. In FIG. 5, the fixing part 31 of the clip 3 is inserted into the window hole of the rear shaft 1 and fixed with the fixing screw 4 arranged inside the rear shaft 1 for the reason of design. The crown is omitted. That is, it is an integral rear shaft type.

A cam 5 is press-fitted and fixed to a fixing screw 4. The cam 5 is formed by cutting a lower portion of the cylindrical body obliquely to form a profile having a slope having an angle of 180 °, and the profile is in contact with the actuator 6. The tail end of the cylinder 71 is rotatably connected to the cam 5. The tail end of the cylinder 71 is an O-ring 7
4, the spring is repelled forward by the mechanical spring 73, and when rotated, the connection between the cylinder 71 and the cam 5 does not rattle, so that the cylinder 5 rotates smoothly.

When the rear shaft 1 is rotated with respect to the front shaft 2, the cam 5 rotates to move the operator 6 along the profile, and the operator 6 advances the refill 8 to refill the refill 8. A writing body (not shown) at the tip projects from the tip opening of the front shaft 2. When the rear shaft 1 is rotated in the opposite direction, the refill 8 is repelled in the tail end direction by the spring, so that the actuator 6 retreats along the profile of the cam 5 and the writing body at the tip of the refill 8 is Immerse in the front shaft 2.

[0006]

As described above, in the case of an integrated rear-shaft type rotary writing instrument in which the clip 3 is fixed by the fixing screw 4 disposed inside the rear shaft 1 and the crown is omitted,
When the rear shaft 1 is rotated, the rotation torque is transmitted to the cam 5 via the fixing screw 4, but the screw length and press-fit length of the fixing screw 4 and the rear shaft 1 and the fixing screw 4 and the cam 5 are three to three. 4mm
Even if the screw portion or the press-fit portion is fixed with an adhesive, the screw portion or the press-fit portion cannot withstand a large rotational torque, and the cam fixed portion may be broken and become unusable.

Therefore, in the present invention, there is a possibility that even if the rear shaft is rotated, the rotational torque is reliably transmitted to the cam, and the cam fixing portion is broken, even if the rear shaft is an integral type in which the crown for clip attachment is omitted. It is an object of the present invention to provide a rotating and writing type writing instrument.

[0008]

In order to achieve the above object, according to the present invention, a clip fixing portion is inserted into a rear shaft and fixed to the rear shaft with a fixing screw, and a cam is fixed to the fixing screw. When the rear shaft is rotated with respect to the front shaft, the cam rotates to advance the actuator, and this actuator advances the refill that has been repelled to the tail end side by the spring, and the cursive writing of the refill is changed to the front shaft. A rotary dispensing writing implement that protrudes from the front end opening of the base, has a clip placement groove on the top surface, and a substantially bottomed cylindrical fixing ring having a notch in the skirt is fixed to the rear shaft with a fixing screw, and the clip is disposed. The fixing portion of the clip is fitted into the groove, and the projection formed on the cam is engaged with the notch of the fixing ring, so that the rotational moment of the rear shaft is transmitted to the cam via the fixing ring.

[0009]

[Operation] That is, the fixing ring is fixed to the rear shaft together with the clip with the fixing screw, but the fixing portion of the clip is fitted into the clip disposition groove of the fixing ring, so that the fixing portion of the clip functions as a key pin and functions as the key shaft. Is transmitted to the stationary ring. Then, since the projection formed on the cam engages with the notch of the fixed ring, the rotational moment of the rear shaft is reliably transmitted to the cam via the fixed ring after all, and the rotational moment is applied to the fixed screw. There is no breakage of the cam fixing portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. The rotary-extending writing instrument of the present invention is an integral rear shaft type in which a crown for clip attachment is omitted,
The basic configuration of the mechanism for rotating and feeding the writing material of the refill is also the same as that described with reference to FIG. 5, and the description of the same parts is omitted. However, as shown in FIG. 1, in the rotary-feeding writing instrument of the present invention, A fixing ring 9 is fixed to the rear shaft 1 together with the clip 3 by a fixing screw 4.

As shown in FIGS. 2 to 4, the fixed ring 9 is a substantially cylindrical body with a bottom, and has a center hole 91 and a clip arrangement groove 92 formed on the top surface. Further, a notch 94 is formed in the skirt 93. And the center hole 91
Is fixed to the rear shaft 1 by inserting the fixing screw 4 into the clip mounting groove 92 at this time. A projection 51 is formed on the outer periphery of the cam 5, and the projection 51 is engaged with the notch 94.

As described above, since the fixing portion 31 of the clip 3 is fitted in the clip arrangement groove 92 of the fixing ring 9,
When the fixing portion 31 of the clip 3 serves as a key pin and rotates the rear shaft 1 with respect to the front shaft 2, the rotational moment is reliably transmitted to the fixing ring 9 and not transmitted to the fixing screw 4. Since the projection 51 of the cam 5 is engaged with the notch 94 of the fixed ring 9, the rotational moment transmitted to the fixed ring 9 is reliably transmitted to the cam 5, and the writing of the refill 8 is performed as described above. Although the body protrudes from the front end opening of the front shaft 2, since no rotational moment is transmitted to the fixing screw 4,
In spite of being an integral rear shaft type in which the crown for clip attachment is omitted, the fixed portion of the fixing screw 4 is not broken by the rotation operation.

[0013]

As described above, according to the present invention, the fixing portion of the clip is inserted into the rear shaft and is fixed to the rear shaft with the fixing screw, and the cam is fixed to the fixing screw. When the rear shaft is rotated, the cam rotates to advance the armature, and this armature advances the refill that has been repelled to the tail end side by the spring, and the writing body of the refill projects from the tip opening of the front shaft. In the rotary feeding writing instrument, a substantially bottomed cylindrical fixing ring having a clip arrangement groove on a top surface and a notch in a skirt portion is fixed to a rear shaft by a fixing screw, and a clip fixing portion is fixed to the clip arrangement groove. And the projection formed on the cam is engaged with the notch of the fixed ring so that the rotational moment of the rear shaft is transmitted to the cam via the fixed ring. One-piece rear-shaft rotary-feed brush Even ingredients, rotation torque and rotates the rear axle is transmitted securely to the cam, never fixing portion of the fixing screw is broken by rotating operation.

[Brief description of the drawings]

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

FIG. 2 is a partial sectional view of a stationary ring.

FIG. 3 is a plan view of a stationary ring.

FIG. 4 is a bottom view of the stationary ring.

FIG. 5 is an explanatory view of a rotary feeding type writing instrument.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rear shaft 2 Front shaft 3 Clip 31 Clip fixing part 4 Fixing screw 5 Cam 51 Cam projection 6 Actuator 71 Cylinder 72 Coupling screw 8 Refill 9 Fixed ring 91 Center hole of fixed ring 92 Clip arrangement groove of fixed ring 93 Fixed Ring skirt 94 Notch of fixed ring

Claims (1)

(57) [Claims] 1. A fixing portion of a clip is inserted into a rear shaft and is fixed to the rear shaft with a fixing screw. A cam is fixed to the fixing screw. When the rear shaft is rotated with respect to the front shaft, the cam is rotated. Rotating to advance the armature, this armature advances the refill that has been repelled to the tail end side by a spring, and the writing body of the refill projects from the front end of the front shaft. A substantially bottomed cylindrical fixing ring having a clip arrangement groove and a notch in the skirt portion is fixed to the rear shaft by the fixing screw, and the clip fixing portion is fitted into the clip arrangement groove and the cam is fixed to the cam. A rotary feeding writing instrument, wherein the formed projection is engaged with the notch, and the rotational moment of the rear shaft is transmitted to the cam via the fixed ring.