JPH0349905Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a type of writing instrument in which the tip of the cursive writing brush protrudes and retracts from the tip of the shaft.

(Problems to be solved by conventional techniques and inventions) In a type of writing instrument in which the tip of the cursive font protrudes and retracts from the shaft tip opening, the diameter of the tip of the cursive font (d in Figure 2)
It is normal that the diameter of the tip of the shaft is slightly smaller than the inner diameter of the shaft tip opening (D in FIG. 2), which causes looseness when writing and makes it difficult to write. In addition, the protrusion dimension from the tip of the brush to the tip of the shaft (as shown in Figure 1) when the tip protrudes from the tip of the shaft is due to variations in the overall length of the writing body, variations in the overall length of the shaft, and variations in the knock stroke. There is also the problem that the writing quality and appearance are poor due to large variations in the writing quality. Furthermore, there is also the problem that the tip of the brush may stain clothes due to the tip of the brush sticking out of the mouth of the tip of the shaft and sticking to the pocket of clothes, or accidentally pressing the knob at the rear end of the shaft when the tip of the brush is sticking out. Ta.

The purpose of the present invention is to provide a writing instrument that comprehensively solves these problems.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a locking step on the ball of the clip, and a ball on the barrel at a position opposite to the ball of the clip. A penetrable hole is provided and a long hole in the axial direction is provided at another position, and the locking tube is movable in the axial direction inside the shaft cylinder.The locking tube has an operation button and a locking part that fit into the long hole of the shaft cylinder. By inserting the rear end of the writing body into the locking tube and attaching a spring body that presses the writing body forward, the operation button of the locking tube is moved forward along the long hole of the shaft tube. Steps are provided on the outer surface of the tip of the cursive body and on the inner surface of the tip of the shaft, respectively, so that the tip of the cursive body comes into contact with each other by the pressing force of the spring body when the tip of the cursive body protrudes from the shaft tip opening, and the locking tube is engaged with the locking tube. This writing instrument is characterized in that the dimensions are set so that the stop part reaches the position of the hole in the barrel where it can engage with the stop step part of the ball part of the clip.

(Embodiment and operation) The figure shows an embodiment of the present invention, and the operation and operation thereof will be described in detail below based on the drawings.

FIG. 1 is a longitudinal sectional view of the brush tip protruding from the shaft tip opening, and FIG. 2 is a longitudinal sectional view of the brush tip recessed from the shaft tip opening. The shaft has a barrel 1 and a tip 2 screwed onto the tip thereof, a rear threaded tube 3 is press-fitted into the rear end opening of the barrel 1, and a crown 4 is attached to the rear threaded tube 3.
The mounting piece 6 of the clip 5 is clamped and screwed onto the clip 5. A bent piece 6a at one end of the attachment piece 6 has elasticity and is fixed by welding or the like to a substantially central portion of the clip body piece 5a, and the rear end of the clip body piece 5a serves as a pressing portion 5b. A ball portion 7 is provided at the front end of the clip body piece 5a and is biased toward the center in the radial direction by the spring properties of the bent piece portion 6a of the attachment piece 6. A notch 7 having a locking step 7a perpendicular to the axial direction is provided at the front end of the inner abutting surface of the ball portion 7.
b is formed. The barrel 1 has a hole 1a at a position opposite to the ball 7 of the clip 5 through which the ball 7 can penetrate.
is provided, and a long hole 1b extending in the axial direction is also formed on the opposite side surface. A locking tube 8 is fitted inside the shaft tube 1 so as to be movable in the axial direction.
The locking cylinder 8 has a large diameter long cylinder part 8a and a small diameter cylinder part 8c that protrudes further rearward from the rear end surface 8b.
b is provided with a small diameter hole 8d that communicates the large diameter long cylindrical portion 8a and the small diameter cylindrical portion 8c, and a U-shaped notch groove 8e is formed on one side of the large diameter long cylindrical portion 8a. An operation button 8g is protruded from the outer surface of the distal end of the long piece 8f which has internal elasticity and is surrounded by a hole 8h. A locking portion 8i that sharply projects rearward is provided on the front inner edge, and the operation button 8g is fitted into the elongated hole 1b of the shaft tube 1 to prevent rotation. The rear end of the writing body 9 is inserted from the front into the large-diameter long cylinder portion 8a of the locking tube 8, and the rear end surface 8b
A contact rod 10 having a flange 10a at the rear end is inserted into the small diameter hole 8d while being prevented from coming off forward. A coil spring 11 is housed inside the small diameter cylindrical portion 8c so as to come into contact with the small diameter cylindrical portion 8c, and a cover 12 is secured to the outer surface of the small diameter cylindrical portion 8c so as to close the rear end opening of the small diameter cylindrical portion 8c and support the rear end of the coil spring 11. It is covered. On the other hand, the outer periphery of the tip small diameter portion 9a of the cursive body 9 is provided with an outer stepped portion 9b of the tip portion of the cursive body 9 and a tip shaft 2.
A coil spring 13 is interposed between the inner surface step portion 2a and the writing body 9 to urge the writing body 9 backward. The coil spring 13 for returning the writing body has a smaller spring pressure than the coil spring 11 for pressing the contact rod. When the operation button 8g of the locking tube 8 protruding from the long hole 1b of the shaft tube 1 is advanced along the long hole 1b, the locking tube 8, the cover 12, and the coil spring 1 are moved forward.
1. The writing body 9 is pressed forward via the contact rod 10, and the writing tip 9c protrudes from the shaft tip opening 2b.
At this time, the step portion 2c, which the tip outer surface step portion 9b of the writing body 9 comes into contact with due to the pressing force of the coil spring 11, engages the front end of the coil spring 13 in the tip shaft 2.
It is provided at the rear position of a. Further, the dimensions of the required portions are set so that when the brush tip portion 9c protrudes from the shaft tip opening 2b, the aforementioned hole 8h of the locking tube 8 moves forward to a position opposite to the hole 1a of the shaft tube 1. Therefore, the ball portion 7 of the clip 5 is inserted into the hole 8h of the locking tube 8 through the hole 1a of the shaft tube 1, and the locking step portion 7a thereof is engaged with the locking portion 8i of the hole 8h, so that the writing body 9 is in a protruding state. maintain it. In this way, the brush tip 9c
When the clip 5 is protruding, the ball 7 of the clip 5 is recessed into the barrel 1, so it is very difficult to insert the clip 5 into clothing, and even if it is inserted, it will not lock with the locking step 7a of the ball 11. The engagement with the locking part 8i of the cylinder 8 is released, and the writing body 9 is moved backward by the returning coil spring 13, so that the writing tip 9c is recessed into the shaft. In order to normally retract the brush tip 9c from the protruding state, press the pressing portion 5b of the clip 5.
This is done by pressing the ball in the direction that hits the crown 4 to lift the ball part 7 so as to separate it from the surface of the shaft cylinder, thereby releasing the engagement between the locking step part 7a and the locking part 8i of the locking cylinder 8.

In addition, when the locking cylinder 8 retreats, its small diameter cylinder part 8c
is inserted into the inner hole 4a of the crown 4.

(Effects of the invention) The present invention has the above-mentioned configuration and function, and first, when the tip of the writing tip protrudes from the shaft tip opening, the spring body (coil spring 11) prevents the step on the outer surface of the tip of the writing tip. is in contact with the step on the inner surface of the shaft tip, so even if there is a difference between the tip diameter (d in Figure 2) and the inner diameter of the shaft tip opening (D in Figure 2), play is suppressed. There is no loss of writing quality.

Next, the stepped part of the cursive font and the stepped part on the inner surface of the shaft come into contact and the brush tip protrudes, so the protruding dimension of the brush tip (in Figure 1) is the distance from the tip of the cursive to the stepped part. (L ₁ in Figure 1) and the distance from the tip of the shaft to the stepped part (L ₂ in Figure 1) can be stabilized, and variations in the overall length of the cursive can be reduced by using the spring body (11 Since it is not absorbed by the compression of the coil spring) and is not affected by it, the writing quality and appearance are stable. In addition, when using a clip, the tip of the brush must be recessed into the shaft, so it is difficult to attach it to clothing with the tip of the brush protruding. Since the operation button of the locking tube provided on the side of the tube must be slid, there is no chance of accidentally knocking the rear end of the shaft and causing the tip of the brush to protrude easily when attaching the brush to clothing. This has effects such as sufficient measures to prevent staining.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal cross-sectional view of the brush tip in a protruding state, and FIG. 2 is a longitudinal cross-sectional view of the brush tip in a retracted state. 1... shaft cylinder, 1a... hole, 1b... long hole, 2...
...Tip, 2a...Stepped part, 2b...Shaft tip opening, 2c
...Stepped portion, 3... Rear threaded pipe, 4... Crown, 4a...
...Inner hole, 5...Clip, 5a...Body piece, 5
b... Pressing part, 6... Mounting piece, 6a... Bent piece part, 7... Ball part, 7a... Locking step part, 7b... Notch, 8... Locking tube, 8a... Large Long diameter cylinder part, 8b...
...Rear end surface, 8c...Small diameter cylindrical part, 8d...Small diameter hole,
8e... Notch groove, 8f... Long piece part, 8g... Operation button, 8h... Hole, 8i... Locking part, 9... Cursive, 9a... Small diameter part, 9b... Step part, 9c ……
Brush tip part, 10...Abutting rod, 10a...Brim part, 11
...Coil spring, 12...Cover, 13...Coil spring.

Claims (1)

[Scope of utility model registration request] A locking stepped portion is provided on the ball portion of the clip, a hole through which the ball portion can penetrate is provided in the shaft cylinder at a position opposite to the clip ball portion, and an elongated hole in the axial direction is provided at another position,
A locking tube that is movable in the axial direction inside the barrel is provided with an operation button and a locking part that fit into the long hole of the barrel, and the rear end of the writing body is inserted into the locking tube, and the writing device is inserted into the locking tube. A spring body that presses the body forward is attached, and by moving the operation button of the locking tube forward along the long hole of the barrel, the tip of the cursive writing body is made to protrude from the shaft tip opening, and the spring body A shaft tube is provided with stepped portions on the outer surface of the tip of the writing body and on the inner surface of the tip of the shaft, which come into contact with each other with a pressing force, and the locking portion of the locking tube can engage with the locking stepped portion of the ball portion of the clip. A writing instrument characterized by having dimensions set so as to reach the position of the hole.