JP4428000B2 - Rod body feeding device - Google Patents

Description

  According to the present invention, a guide member having a slit formed inside an outer cylinder having an inner surface formed with a spiral groove is rotatably disposed, and a rod-shaped body receiving member is disposed inside the guide member. The present invention relates to a rod-like body feeding device in which a member is screwed into a spiral groove through the slit.

  A writing instrument is known in which a long eraser is placed behind a mechanical pencil so that it can appear and disappear. One example will be described. A mechanical pencil mechanism is accommodated in the outer cylinder having the tip. At the rear part of the outer cylinder, a spiral groove is provided on the inner surface of the rear part of the cylindrical cap, and a receiving part that increases the rear inner diameter of the spiral groove and contacts the core tank provided in the front part of the cylindrical body. A slit is provided in the rear portion of the cylindrical body, and the eraser holding portion of the eraser cradle is slidably fitted into the slit, and the protrusion provided on the holding portion is fitted into the spiral groove, and the cylindrical body is provided. The front part of the outer cylinder is extended to the inner surface of the rear part of the outer cylinder, and is axially movable with respect to the outer cylinder and locked in the rotational direction, so that the clamping part is displaced outward at the spiral groove part having a large inner diameter. An eraser feeding unit is installed.

That is, when the protrusion provided on the holding part reaches the large inner diameter part of the spiral groove, the protrusion is detached from the spiral groove, and the eraser cradle idles with respect to the cylindrical cap, and the holding part is moved outward. It is displaced to.
No. 7-30394

However, for the rotation operation more than necessary, although idling and damage is prevented, once the protrusion of the clamping part is detached from the spiral groove, it is not screwed again even if it is rotated in the reverse direction. I couldn't store the eraser and sometimes made me feel bad. Therefore, an operation of pressing the eraser against a finger or a desk and screwing it in reverse is also performed, but it cannot be said to be a satisfactory return operation, and is a troublesome return operation.
In addition, when erasing is performed with the protrusion of the eraser cradle positioned at the crest formed between the spiral grooves having a large inner diameter, the projection is dropped from the crest to the normal spiral groove by the erasing pressure. Suddenly, the eraser withdrew, and I was disgusted again.

According to the present invention, a guide member having a slit formed inside an outer cylinder having an inner surface formed with a spiral groove is rotatably disposed, and a rod-shaped body receiving member is disposed inside the guide member. A rod-like body feeding device in which a member is screwed into a spiral groove through the slit, and is substantially equal to the spiral groove or at least one of the inner surface front and rear of the inner cylinder, or from the spiral groove. A deep groove extending continuously to the spiral groove and extending to the rear end of the outer cylinder, closing the front portion or the rear portion of the slit, and moving the rod-shaped body receiving member to the most advanced position, Alternatively, at the most retracted position, the rod-shaped body receiving member into contact with the closed portion of the slit deforming, by the reaction of the modified operation, the rod-shaped body receiving advance the member, or the biasing said toward the backward direction It is the gist of.

According to the present invention, a guide member having a slit formed inside an outer cylinder having an inner surface formed with a spiral groove is rotatably disposed, and a rod-shaped body receiving member is disposed inside the guide member. A rod-like body feeding device in which a member is screwed into a spiral groove through the slit, and is substantially equal to the spiral groove or at least one of the inner surface front and rear of the inner cylinder, or from the spiral groove. A deep groove extending continuously to the spiral groove and extending to the rear end of the outer cylinder, closing the front portion or the rear portion of the slit, and moving the rod-shaped body receiving member to the most advanced position, Alternatively, at the most retracted position, the rod-shaped body receiving member into contact with the closed portion of the slit deforming, by the reaction of the modified operation, the rod-shaped body receiving advance the member, or the biasing said toward the backward direction Because, most advanced position, or be idling outer shaft and the rod member receiving member at the most retreated position, of course, return operation can be obtained with certainty.

A rod-like body feeding device 2 according to the present invention is detachably attached to the rear side of the shaft tube 1 in which the core feeding mechanism is disposed. Reference numeral 3 is a knock piece for feeding out the core disposed on the side surface of the intermediate portion of the shaft tube 1. This is a so-called side knock type mechanical pencil.
Hereinafter, the rod-shaped body feeding device 2 will be described. A spiral groove 5 is formed on the inner surface of the outer cylinder 4, and a groove portion 6 having a depth substantially equal to the spiral groove 5 is continuously formed at the rear of the spiral groove 5, The groove 6 extends to the rear end of the inner surface of the outer cylinder 4.
In addition, a cylindrical rod-shaped body guide member 7 is rotatable inside the outer cylinder 4 but cannot be moved back and forth. That is, a flange portion 9 having an internal space portion 8 is formed at the upper end portion of the rod-shaped body guide member 7, and the upper end portion of the outer cylinder 4 is rotatable in the internal space portion 8. Is engaged impossible. In this example, the circumferential upper groove portion 10 is formed in the internal space portion 8, while the circumferential projection 11 is formed in the outer cylinder 4 and engaged with them.
In addition, a guide groove 12 that penetrates is formed at a position facing the longitudinal direction of the cylindrical rod-shaped body guide member 7, but the upper portion of the guide groove 12 is closed. And the leg part 15 of the rod-shaped body receiving member 14 holding the rod-shaped body 13 (in this example, eraser) is slidably inserted into the closed guide groove 12. And the protrusion 16 is each formed in the leg part 15, and it is screwing together in the said spiral groove 5. FIG. The leg portions 15 are formed at two locations facing each other corresponding to the guide groove 12, but have different longitudinal heights. More specifically, the right leg 15 extends longer upward than the left leg 15 in FIG. Reference numeral 17 denotes a cylindrical holding portion that holds the rod-like body 13.

Next, the operation will be described. When the outer tube 4 and the flange 9 of the rod-shaped body guide member 7 are pinched and rotated relative to each other from the last retracted position of the rod-shaped body receiving member 14 shown in FIG. The rod-shaped body 13 protrudes from the rear end opening of the rod-shaped body guide member 7 (see FIGS. 2 and 3). Furthermore, when the outer cylinder 4 and the rod-shaped body guide member 7 are relatively rotated, the rod-shaped body receiving member 14 reaches the most advanced position, and one of the protrusions 16 of the rod-shaped body receiving member 14 is detached from the spiral groove 5. The other protrusion 16 is screwed into the spiral groove 5 by about half. At this time, one leg portion 15 of the rod-shaped body receiving member 14 comes into contact with the closing portion 12a of the guide groove 12 to prevent the leg portion 15 from moving forward (see FIGS. 4 and 5). Here, when the outer cylinder 4 and the rod-shaped body guide member 7 are further rotated relative to each other, the rod-shaped body receiving member 14 tends to rise while the forward movement of the one leg portion 15 is restricted. At this time, the other leg portion 15 has a protrusion 16 on the leg portion 15 side screwed into the spiral groove 5 by about half, and the leg portion 15 is prevented from moving upward. It is deformed slightly upward or outward, and is inclined with respect to the axis of the rod-shaped body guide member 7 (see FIG. 6). That is, at this point, the rod-shaped body receiving member 14 is acting downward in the figure as a reaction of the deformation operation. That is, the protrusion 16 formed on the other leg portion 15 of the rod-shaped body receiving member 14 performs an idling operation while receiving an action downward.
Therefore, here, when the relative rotation of the outer cylinder 4 and the rod-shaped body guide member 7 is reversed, the protrusion 16 of the other leg portion 15 makes use of its own elastic restoring force, and easily. It is completely screwed into the spiral groove 5.

In addition, although the inclined surface 16a is formed in the state in which the protrusion 16 in this example is substantially parallel to the axis line of the spiral groove 5, it is for making it easy to return to the spiral groove 5, for example, circular arc shape etc. It may be.
In this example, the groove 6 for the rod-shaped body receiving member 14 to idle and the closing portion 12 a of the guide groove 12 are provided above the spiral groove 5 of the outer cylinder 4. You may provide the groove part and obstruction | occlusion part which the body guide member 14 idles. That is, when it is desired to idle at the last retracted position and to project the rod-shaped body, the projection of the rod-shaped body receiving member may be immediately screwed into the spiral groove to obtain a reliable return operation.

  There are many other possibilities. One example will be described with reference to FIGS. This is an example in which the lengths in the longitudinal direction of the guide portions 19 of the rod-shaped body guide members 18 are made different. In other words, this is an example in which the position of the blocking portion 19a is made different. Specifically, in FIG. 7, the right guide groove 19 is shorter than the left guide groove 19. On the other hand, the two opposing leg portions 21 of the rod-shaped body receiving member 20 have the same length. That is, one leg portion 21 of the rod-shaped body receiving member 20 also comes into contact with the closing portion 19a of the shorter guide groove 19, and its forward movement is prevented.

  In the above example, the rod-shaped body feeding device in which the eraser that is a rod-shaped body is arranged so as to be able to appear and retract is attached to the rear of the mechanical pencil, but the rod-shaped body feeding device alone may be used. Writing tools such as solid correction tools, crayons, and passes may be used, and cosmetic tools such as mascara, eyeliner, and lipstick may be used.

The principal part longitudinal cross-sectional view which shows the best form of this invention. The principal part longitudinal cross-sectional view which shows the state by which the rod-shaped body was protruded. The principal part enlarged view of FIG. FIG. The expanded view of FIG. The principal part longitudinal cross-sectional view which shows operation | movement. 1 is a longitudinal sectional view of a rod-shaped body guide member showing Embodiment 1. FIG. 1 is a longitudinal sectional view of a rod-shaped body receiving member showing Example 1. FIG.

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Rod-shaped object feeding apparatus 3 Knock piece 4 Outer cylinder 5 Spiral groove 6 Groove part 7 Rod-shaped body guide member 8 Internal space part 9 Gutter part 10 Circumferential upper groove part 11 Circumferential protrusion 12 Guide groove 12a Blocking part 13 Rod-like body 14 Rod-shaped body receiving member 15 Leg portion 16 Projection 17 Holding portion 18 Rod-shaped body guide member 19 Guide groove 19a Closed portion 20 Rod-shaped body guide member 21 Leg portion

Claims (2)

A guide member having a slit formed inside an outer cylinder having a spiral groove formed on the inner surface thereof is rotatably disposed, and a rod-shaped body receiving member is disposed inside the guide member, and the rod-shaped body receiving member is disposed in the slit. A rod-like body feeding device screwed into a spiral groove through a groove portion that is substantially the same as the spiral groove or deeper than the spiral groove on at least one of the inner surface front side or the inner surface rear side of the outer cylinder. Continuing to the spiral groove and extending to the rear end of the outer cylinder, the front portion or the rear portion of the slit is closed, and the rod-shaped body receiving member is moved to the most advanced position or the last retracted position. in the position, especially that the rod-like body receiving member into contact with the closed portion of the slit deforming, by the reaction of the modified operation, advancing the rod-like body receiving member, or, which is biased toward the backward direction Rod-like body feeding device to. The slit of the guide member is formed in at least two places, the front part or the rear part of the slit is closed, and the position of the closed part is made different with respect to the axial direction of the guide member. The rod-shaped body feeding device according to claim 1 .

Images