JPH0443349Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mechanism for ejecting and retracting a writing font in a writing instrument. More specifically, it is a writing instrument that has a structure in which the writing part protrudes from the opening of the barrel when writing, and when not writing, the writing part is moved back and stored in the barrel, and when the clip is pressed, the writing part can be inserted into the barrel. The present invention relates to a writing instrument in which a writing part of the invention protrudes from a barrel opening.

Conventional technology Traditionally, when not writing, the cursive writing body was stored inside the barrel.
A writing instrument structure in which a writing body is moved forward by embedding a clip in a shaft body to create a writing state is disclosed in Japanese Utility Model Publication No. 47-5657 and the like.

Problems to be Solved by the Invention However, in the conventional retractable mechanism that moves the writing body forward and into the writing state by burying the clip in the barrel, the contact between the end face of the clip and the rear end face of the writing body is difficult. Due to the insufficient surface area, there are problems such as the cursive writing being unstable when writing, and the protruding stroke of the cursive writing not being long enough.

Means for Solving the Problems The present invention solves the above-mentioned problems and provides a mechanism for protruding and retracting a writing instrument, which allows the protrusion stroke of the cursive to be long and maintains a stable protruding state of the cursive during writing. It is something.

The configuration of the present invention will be explained below based on drawings of embodiments.

The clip 2 consists of a holding part and a base, and the side of the base of the clip 2 has a plurality of protrusions (in the present invention, two
1, 22), the inner surface of the base is provided with a sliding groove 25 in which the bent portion 35 of the expandable member 3 slides, the tip of the base is provided with a locking portion 23, and the inner surface of the rear portion of the base is provided with a spring seat 24. There is. In this embodiment, there is one spring seat, but there may be two or more spring seats on the inner surface of the clip.

The elastic member 3 is provided with an elastic portion 31, a contact portion 32 that contacts the writing body 7, and a locking portion 33 that locks on a stopper 61 provided on the barrel 6.
A spring seat 34 is provided at a position corresponding to the position of the spring seat 24 of the clip 2. To give one example of the expandable part 31, it is made up of a plate-like member 37 in which cut grooves 36 are vertically arranged alternately at predetermined intervals.
A bent portion 35 is provided at the location of the cut groove 36 .

The cam cylinder 4 has a protruding piece 21 of the clip 2 on the side,
The cam grooves 41 and 42 are provided with cam grooves 41 and 42 on which the 22 slides, and the cam grooves 41 and 42 are approximately L-shaped, and include a linear groove in the radial direction and a locking groove that is bent forward in the axial direction. Sections 43 and 44 are provided, respectively. The inner bottom surface of the cam cylinder 4 is provided with a sliding groove 45 in which the bent portion 35 of the telescoping member 3 slides, and the rear end surface has a notch portion 46 that protrudes from the barrel 6 during writing. is not limited to being integrally formed, but may be formed separately (see FIG. 7).

The guide tube 5 is provided at its rear end with a sliding groove 51 in which the contact portion 32 of the telescoping member 3 slides.

Stoppers 61 and 62 are provided at the rear end of the shaft barrel 6 and at the front of the guide tube 5, respectively.

Insert the telescopic member 3 into the sliding groove 45 of the cam cylinder 4,
Attach the protruding piece 21 of the clip 2 to the cam groove 41 of the cam cylinder 4.
Insert the protrusion pieces 22 into the cam grooves 42, respectively,
Spring seat 24 of clip 2 and spring seat 3 of telescopic member 3
4, a spring body 8 is inserted between the guide cylinder 5 and the cam cylinder 4, and a spring body 9 is inserted between the guide cylinder 5 and a stopper 62 provided on the shaft cylinder 6. Then, the locking portion 33 of the telescopic member 3 is brought into contact with the stopper 61 to be assembled.

Effect The action will be explained below.

When the clip 2 is buried in the shaft body, the elastic part 3
1 extends and the contact portion 32 moves forward, the clip 2 gradually sinks into the barrel 6, and the clip 2
The protruding pieces 21 and 22 of the cam cylinder 4 are connected to the locking parts 43 and 4 of the cam cylinder 4.
When reaching position 4, the guide cylinder 5 is pushed backward by the spring body 9, so the cam cylinder 4 moves rearward and the notch part 46 of the cam cylinder 4 protrudes from the shaft cylinder 6.
At the same time, the protruding pieces 21 and 22 engage the locking parts 43 and
By being locked to 44, it is possible to obtain a holding property that can withstand writing pressure, and the writing body 7 can be stably put into practical use without wobbling during writing.

When the notch part 46 is pressed in the writing state (see FIG. 3), the cam cylinder 4 moves forward and the protrusions 21 and 22 are released from the locking parts 43 and 44. At this time, since the writing body 7 is elastically locked in front by the spring body, as the writing body 7 moves backward, the elastic part 31 contracts, and the pushing force of the clip 2 by the bending part 35 and the elastic force by the spring body 8 Clip 2 due to force
Push up to make the clip 2 protrude from the shaft barrel 6. The clip 2 in the protruding state is supported by the bending part 35 of the extensible part 31 and the spring body 8, so that the protrusion from the shaft barrel 6 is stable.

Effects of the invention By embedding the clip 2 in the barrel, the extendable part 31 is extended and the writing body 7 is made to protrude. Therefore, the protruding stroke of the writing body 7 can be made long, and in the writing state, the clip 2 is inserted into the barrel. Since the writing part is stored in the sleeve 6, the clip function cannot be performed unless the notch 46 is pressed to store the writing part inside the shaft 6. Therefore, the writing part can be placed in a pocket with the writing part protruding from the opening of the shaft 6 and put on clothes. It does not get dirty and satisfies its practicality as a lightweight writing instrument.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a longitudinal sectional view of the main part when not writing, Figure 2 is a longitudinal sectional view of the main part in an intermediate state of operation, Figure 3 is a longitudinal sectional view of the main part when writing, and Figure 4 is a longitudinal sectional view of the main part when not writing. 5 is a sectional view taken along line AA, FIG. 6 is a sectional view taken along line BB, and FIG. 7 is an exploded perspective view of the shaft barrel and cam cylinder. DESCRIPTION OF SYMBOLS 1... Retraction mechanism, 2... Clip, 21... Protrusion piece, 22... Protrusion piece, 23... Locking part, 24...
... Spring seat, 25 ... Sliding groove, 3 ... Telescopic member, 3
1... Expandable part, 32... Contact part, 33... Locking part, 34... Spring seat, 35... Bent part, 36...
Cut groove, 37...Plate member, 4...Cam cylinder,
41...Cam groove, 42...Cam groove, 43...Locking portion, 44...Locking portion, 45...Sliding groove, 46...
Knot part, 5...Guide cylinder, 51...Sliding groove, 6
... shaft body, 61 ... stopper, 62 ... stopper, 7 ... cursive, 8 ... spring body, 9 ... spring body.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A writing instrument with a structure in which the writing part of the cursive body protrudes from the barrel opening when writing, and when not writing, the writing part of the cursive body is retracted and stored in the barrel. The cam grooves 41 and 42 of the cam cylinder 4 slidably inserted into the clip 2 are slidably engaged with the protrusions 21 and 22 of the clip 2, and the cam grooves 41 and 42 are a linear groove;
The clip 2 is composed of locking parts 43 and 44 that are bent forward in the axial direction, and the clip 2 is composed of a holding part and a base part.
A telescopic member 3 having a plurality of bending portions 35 is disposed inside the base, and a stopper 61 is provided on the shaft body 6 so as to come into contact with one end of the telescopic member 3. A spring seat 24 is provided on the inner surface, a spring seat 34 is provided on the extensible member 3 at a position facing the spring seat 24, and a spring body 8 is interposed between the spring seats 24 and 34. , a guide cylinder 5 is inserted into the shaft cylinder 6 so as to come into contact with the front end of the cam cylinder 4, a stopper 62 is provided in front of the guide cylinder 5 of the shaft cylinder 6, and a stopper 62 is provided between the guide cylinder 5 and the stopper 62. A spring body 9 is interposed therebetween, and a notch portion 46 is provided at the rear end of the cam cylinder 4. By embedding the clip 2 in the barrel 6, the telescopic member 3 is extended and the writing body 7 is moved forward. The cam barrel 4 moves backward with the writing part protruding from the opening of the barrel 6, and the cam barrel notch 46 protrudes from the rear end of the barrel 6 to be in the writing state. 2 floats from the barrel 6, and the writing part of the writing body 7 is stored in the barrel 6 to be in a non-writing state. 2 The telescopic member 3 is inserted into the cut groove 3 at a predetermined interval.
6 are plate-like members 37 arranged vertically in an alternating manner, and the cut grooves 36 are bent to form a zigzag shape. Mechanism 1.