JP4996201B2 - Rotating feeding type eraser - Google Patents

Description

  The present invention relates to a rotary feeding type eraser device that feeds a rod-shaped eraser from an opening end of an eraser device main body, a shaft tube of a writing instrument, a cap or the like by a rotating operation.

  The rotary feeding type eraser device is widely used and various structures are known. Basically, a slider for holding the eraser is slidably engaged with a slit of the rotary sleeve, and the rotary sleeve is formed into a cylindrical shape. A rotary feeding mechanism is provided that is rotatably housed inside a main body, a cap, and the like, and that moves the slider forward or backward when the main body or the rotation sleeve is relatively rotated. With such a device, the eraser can be fed out sequentially and used, but when the eraser is used to the end, the base end part (remaining part) of the eraser held by the slider remains inside the main body etc. It cannot be easily replaced with an eraser.

  In order to improve the disadvantage that the remaining portion of the eraser cannot be easily taken out, various devices have been proposed in which the receiving member holding the eraser can protrude from the tip of the rod-like body feeding device (for example, Patent Document 1). reference). In these devices, when the eraser is consumed, a part of the receiving member protrudes from the tip, so that the remaining part can be taken out, but usually the receiving member is formed with a small claw-like protrusion for preventing the removal. Since the claw-like projections are difficult to get into the remaining portion, it has to be forcibly pulled out, and the work is troublesome.

For this reason, it has also been proposed to form the receiving member in a shape in which the tip of the receiving member is warped outward so that the receiving member expands outward when a part of the receiving member protrudes from the tip of the main body or the like. However, if a spreading force is applied to the tip of the receiving member so as to spread outward, the tip is always pressed against the female screw during normal use. May become heavier and may not be able to operate smoothly due to being caught by the female screw portion.
Utility Model Registration No. 2555014 (Utility Model Registration Claims 1, 2, 5, and 6)

  The problem to be solved by the present invention is that it is not necessary to forcibly pull out the remaining part of the eraser when the eraser is exhausted in the rotary payout type eraser as described above, and this also hinders normal operation. It is an object of the present invention to provide a rotary payout type eraser device that can easily remove the remaining part of the eraser and that is simple in construction and economical.

  According to the present invention, a rotating sleeve that is rotatably provided in the main body and stores an eraser inward, a slider having a holding claw provided in the rotating sleeve and gripping the base of the eraser, and the main body or the rotating In a rotary payout type eraser apparatus provided with a rotary payout mechanism provided between the main body, the rotary sleeve and the slider so that the slider moves forward or backward in the axial direction of the rotary sleeve when the sleeve is relatively rotated, the eraser is Provided is a rotary feeding type eraser device provided with an opening means for moving the holding claw in a direction to release the grip of the eraser when the slider moves forward to a worn position, and the above problem is solved. .

  According to the present invention, as the opening means, there is provided an operation ring having an inclined surface such that when the slider advances to the eraser consumption position, the holding claw hits and warps the holding claw outward.

  Further, according to the present invention, as the opening means, when the slider advances to the eraser consumption position, it is bent inward by hitting a stopper on the inner surface of the main body, and the holding claw provided at the other end is moved outward. An action piece provided on the slider is provided.

  The present invention is configured as described above, and when the main body or the rotating sleeve is relatively rotated, the eraser is drawn out from the tip of the main body and can be used as usual, and when the slider advances to a position where the eraser is consumed. Since the holding claw of the slider is forcibly moved in the direction of releasing the grip of the eraser by the opening means, the remaining part of the eraser falls off by its own weight. Therefore, it is not necessary to manually pull out the remaining portion of the eraser from the holding claw as in the conventional case, and the replacement of the eraser is extremely easy. Also, the configuration is simple and can be obtained economically.

  The rotary feeding type eraser device of the present invention can be incorporated in a shaft tube or a cap of a writing instrument. Hereinafter, an embodiment of an independent eraser device will be described in detail. 1 to 3, an eraser device according to the present invention includes a main body (a cap and a shaft tube in the case of a writing instrument) (1), and a rotating sleeve (2) rotatably provided in the main body (1). And a rod-shaped eraser (3) housed in the rotating sleeve (2), and a holding claw (4) for gripping the base of the eraser (3) in the rotating sleeve (2) in the axial direction. A slider (5) provided so as to be movable and an appropriate one provided between the members so as to move the slider (5) forward or backward when the main body (1) or the rotating sleeve (2) is relatively rotated. And an operating ring (6) connected to the rotating sleeve (2) and a tail plug (7) for closing the rear end of the main body (1).

  As shown in FIGS. 5 and 6, the main body (1) is a cylindrical body that is open at both ends, has a stepped portion (8) on the outer periphery, and has an outer engaging portion (9) at the tip. The inner engagement portion (10) formed on the inner surface of the operation ring (6) is rotatably engaged with the outer engagement portion (9) and the rear end portion (11) of the operation ring (6). ) Abuts on the step (8). Further, a rotation preventing protrusion (12) extending in the axial direction is formed inside, and an inner step (13) is provided on the inner surface on the front end side, and a receiving portion ( 14) is formed.

  As shown in FIGS. 7 and 8, the rotating sleeve (2) has a head (15) that is formed in a cylindrical body that is open at both ends, and that has a protrusion that protrudes in a substantially cross shape on the tip side. In addition, a step portion (16) is provided on the rear end side, and a small diameter portion (18) having a cut (17) is formed. A retaining protrusion (19) for engaging the tail plug (7) is provided on the inner side of the small diameter portion (18), and a retaining protrusion (20) for engaging a rack body described later is provided on the outer end. A slit (21) extending in the axial direction is provided in the intermediate portion in an opposing state, and both ends of the slit are closed by the head (15) and the small diameter portion (18).

  As shown in FIGS. 9 to 11, the slider (5) is provided with the holding claws (4) facing each other with a substantially disc-shaped base piece (22) interposed therebetween, and the tip of the holding claws (4). A claw portion (23) projecting inwardly by a mountain-shaped slope is formed on the surface, and the eraser (3) is sandwiched from both sides. An action piece (24) having a width to be slidably fitted into the slit (21) of the rotating sleeve (2) is formed in a portion continuous with the holding claw (4). A male screw part (25) is provided on the outer periphery of 24).

  Various configurations of the rotary feeding mechanism are known, and various rotary feeding mechanisms can be used in the present invention. In the structure generally used, the internal thread part is formed in the inner surface of the said main body (1). As is well known, the internal thread portion may be formed integrally with the inner surface of the main body (1), or the internal thread portion may be formed separately and incorporated into the main body. When the female screw part and the main body are formed separately, for example, the main body is formed of a resin material having transparency in consideration of vision, and the female screw part is formed of a resin material having good slidability. The operation of can also be made smooth. In addition, a combination of the transparent color of the main body and the color of the female threaded portion provides a variety of changes.

  The female thread portion can be formed in a rod-shaped rack body, but in the embodiment shown in FIGS. 12 and 13, the substantially semi-cylindrical rack body (27), (28) having the female thread portion (26) on the inner surface. The rack body (27) having the upright portion (29) and the other rack body (28) are overlapped to form a substantially cylindrical body, and the rack bodies (27) and (28) are arranged in the circumferential direction. An end edge of the main body (1) hits the protrusion (12) to prevent rotation. The rack body shown in the figure is configured by combining two members, but only one semi-cylindrical rack body may be used, or a plurality of three or more may be combined. In addition, a step portion (30) for preventing the rotation sleeve (2) from coming off is formed inside the standing portion (29).

  The tail plug (7) has substantially the same outer diameter as that of the main body (1), and has a hollow connecting shaft (32) protruding inward via a step portion (31) with which the rack body, the rotating sleeve, etc. abut. ) And an engaging portion (33) that engages with a retaining protrusion (19) provided inside the rotating sleeve (2) is provided on the outer periphery of the connecting shaft (32).

  As shown in FIGS. 15 to 20, the operation ring (6) has a large-diameter portion (34) having an inner diameter rotatably fitted to the outer periphery of the main body (1) and an outer periphery of the eraser (3). A small-diameter portion (35) having an inner diameter almost in sliding contact is formed, and the inner surface of the large-diameter portion (34) is inwardly engaged with the outer engaging portion (9) of the main body (1) as described above. An engaging portion (10) is formed. The cross-sectional shape of the inner end of the large-diameter portion (34) is formed such that the rotary sleeve (2) and the operation ring are connected in a non-rotating state. In the embodiment shown in the figure, as shown in FIG. 7, a head portion (15) having a projecting portion that expands in a substantially cross shape is formed at the tip of the rotating sleeve (2). In this way, the hole has a substantially cross-shaped cross section. For example, the outer periphery of the head (15) of the rotating sleeve (2) is substantially circular, and protrusions (not shown) are formed in a part or a plurality of portions thereof, and the large-diameter portion (34) of the operating ring (6) is formed. The inner surface may be substantially circular to provide a recess (not shown) for engaging the projection of the head (15), or a sawtooth-like projection may be provided (not shown).

  The inner surface of the head (15) of the rotary sleeve (2) is opened to a shape that allows the holding claw (4) of the slider (5) to pass therethrough. As shown in FIG. 18, a groove (36) through which the holding claw (4) can be inserted is formed near the small diameter portion (35), and the holding claw (4) can protrude from the small diameter portion (35). An open window (37) is provided.

  Furthermore, when the slider (5) advances to the position where the eraser (3) is consumed, that is, when the holding claw (4) reaches the open window (37), the operation ring (6) An opening means for moving the holding claw in a direction to release the grip of the eraser is provided. In the embodiment shown in FIG. 16, the opening means is an inclined surface (38) provided at the edge of the opening window (37), and the holding claw (4) hits the inclined surface (38) and the inclined surface (38). When riding on the surface (38), the tip warps outward and the eraser is released.

  Thus, in order to assemble the parts, the rack bodies (27), (28) are inserted into the main body along the ridges (12) from the rear end of the main body (1), The abutting portion (29) is fitted to the receiving portion (14) by being brought into contact with the inner step portion (13) of 1) (FIG. 21). On the other hand, the slider (5) is forced into the rotating sleeve (2) from the opening of the slit (21) (FIG. 22). Then, the rotating sleeve (2) is inserted into the main body (1) from the front end of the main body (1), the head (15) is brought into contact with the front end of the main body, and the retaining protrusion (20) on the outer periphery is provided. Engage with the step (30) of the rack body (27).

  Further, the connecting shaft (32) of the tail plug (7) is inserted from the rear end of the main body (1), and the retaining protrusion (19) provided with the engaging portion (33) on the inner periphery of the rotating sleeve (2). (Fig. 23). Finally, the operating ring (6) is inserted into the tip of the main body (1), the engaging portions (9) and (10) are connected (FIG. 24), and the eraser (3) is inserted between the holding claws (4). Then, when the operating ring is rotated and the slider (5) is moved backward, the rotary feeding type eraser device having the structure shown in FIG. 2 is obtained.

  The above eraser device can be used as usual by rotating the operation ring to project the eraser. When the eraser is consumed, the holding claw (4) of the slider (5) hits the inclined surface (38) provided at the end of the open window (37) as shown in FIG. By further rotating and advancing the slider (5), the holding claw (4) rides while sliding on the inclined surface (38) and is spread outward, and the eraser (3) is released. As a result, the remaining part of the eraser falls by its own weight.

  As described above, an appropriate mechanism can be used as the opening means as long as it can forcefully release the holding claws of the slider. In the embodiment shown in FIGS. 25 to 29, as in the above embodiment, the tip of the holding claw is directly expanded outward, and the action piece provided at one end of the slider is pressed inward so that the holding claw is The slider swings around the base piece of the slider, and the tip is easily moved outward.

  The slider (39) basically has substantially the same configuration as the slider (5) of the above embodiment, but the action piece (24) having the external thread portion (25) on the outer periphery is pressed inward. The base piece (40) is preferably formed so that the tip of the holding claw (4) can swing outwardly about the base piece (40). As such a configuration, for example, as shown in FIG. 25, a horizontal hole (41) is provided in a part of the base piece (40), or the base piece (40) is bent into a substantially S shape (FIG. 26). The horizontal hole (41) can be provided with an inclination (FIG. 27) or can be formed appropriately.

  The holding claw (4) and the action piece (24) are made of a hard synthetic resin material, and the base piece (40) is made of a soft synthetic resin material with the holding claw (4) or the like by double molding or insert molding. You may make it integrally by the point (illustration omitted). Even when the base piece is easily bent by such an embodiment or the embodiment shown in FIGS. 25 to 27, when the slider (39) is retracted to the back of the rotating sleeve (2), Since the action piece (24) is in sliding contact with the outer periphery of the small diameter portion (18) of the rotating sleeve (2) to prevent retraction, the slider always stands by at a fixed position, and the action is performed when starting the rotation. There is no possibility that the piece (24) bends inward and the forward movement is hindered, and the operation is not hindered.

  When the slider (39) advances to the position where the eraser is consumed, the male screw portion of the slider abuts the female screw portion (26) formed on the rack body (27) or the rack body (28). As shown in FIG. 28, a stopper (42) for closing the end on the tip side is provided. In the embodiment shown in the figure, a stopper (43) is also provided on the rear end side of the female thread portion (26). However, as described above, when the slider (39) is retracted to this position, the slider (39) 39) Since the action piece (24) is in sliding contact with the small diameter portion (18) of the rotating sleeve (2) and is prevented from moving backward, the slider stops at a fixed position.

  With the above configuration, when the slider (39) is moved to the wear position using the eraser (3), the holding claw (4) reaches the open window (37) of the operation ring (6) and the slider as described above. The male screw part (25) of (39) hits the stopper (42) of the female screw part (26) and stops moving. When the rotation of the operation ring is further continued, the male screw part (25) is disengaged from the female screw part (26), and the action piece (24) is pushed inward and sinks in the central axis direction. The holding claw (4) located on the opposite side rides on the inclined surface (38) while swinging outward about the base piece (40), and releases the grip of the eraser. As a result, the remaining part of the eraser falls by its own weight and can be replaced with a new eraser.

Plan view. AA sectional view taken on the line AA of FIG. The BB sectional drawing of the state of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. Sectional drawing of a main body. AA line sectional view of Drawing 5. The top view of a rotation sleeve. Sectional drawing of a rotation sleeve. The top view of a slider. The side view of a slider. Sectional drawing of a slider. The perspective view of a rack body. Sectional drawing of the rack body which has a standing part. Side view of tail plug. The top view of an operation ring. AA line sectional view of Drawing 15. BB sectional drawing of FIG. The CC sectional view taken on the line of FIG. The DD sectional view taken on the line of FIG. EE sectional view taken on the line of FIG. Explanatory drawing when mounting a rack body in a main body. Explanatory drawing when incorporating a slider into a rotating sleeve. Explanatory drawing when incorporating a rotating sleeve and a tail plug into the main body. Explanatory drawing when installing an operation ring in a main body. The other Example of a slider is shown, (A) is a side view, (B) is sectional drawing. The modification of a slider is shown, (A) is a cross-sectional view, (B) is a longitudinal cross-sectional view. The longitudinal cross-sectional view which shows the modification of a slider. The top view which shows the internal thread part of a rack body. The expanded sectional view of a part of the state where the eraser was extended to the consumption position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Rotating sleeve 3 Eraser 4 Holding claw 5 Slider 6 Operation ring 7 Tail plug 15 Head 21 Slit 22 Base piece 24 Action piece 25 Male thread part 26 Female thread part 27, 28 Rack body 37 Opening window 38 Inclined surface 39 Slider 40 Base Piece 42 stopper

Claims (7)

A rotating sleeve that is rotatably provided in the body and stores an eraser inward, a slider having a holding claw provided in the rotating sleeve and gripping the base of the eraser, and the main body or the rotating sleeve relatively rotate. In the rotary feeding type eraser device having a rotary feeding mechanism provided between the main body, the rotating sleeve and the slider so that the slider moves forward or backward in the axial direction of the rotating sleeve , an operation ring is provided at the tip of the rotating sleeve. And a groove that allows the holding claw to pass through and an opening window that leads to the groove are formed in the operation ring, and the gripping of the eraser is released when the slider advances to a position where the eraser is consumed. when the gripping claws in contact with the end of the window opening so as to move the holding claws, the inclined surfaces deflecting the tip of the holding claws outwardly Rotating pay-out type eraser apparatus characterized by forming the. The rotation feeding mechanism includes a substantially semi-cylindrical rack body that is non-rotatably mounted on the inner surface of the main body and has a female threaded portion on the inner surface, and an axially extending slit formed on the rotating sleeve so that the slider is slidably engaged. And a male thread portion provided on an outer periphery of the slider so as to project from the slit and engage with the female thread portion. The rotational extension type eraser device according to claim 2 , wherein a plurality of the rack bodies are provided. The rotation payout type eraser device according to claim 2 or 3 , wherein a protrusion for preventing rotation is formed on an inner surface of the main body so that an edge in a circumferential direction of the rack body comes into contact therewith. The rotation feeding mechanism includes a female screw portion provided on the inner surface of the main body, a slit formed in the rotary sleeve so that the slider is slidably engaged, and a screw projecting from the slit to be screw-engaged with the female screw portion. has a male screw portion provided on the outer periphery of the slider, and the action piece digits set based on pieces of the slider so as to swing the holding claws, the stopper digits set the end of the female screw portion so that the male screw portion abuts, said stopper 2. The rotary feeding type eraser device according to claim 1, wherein the operation piece is bent inward by further rotating the rotary sleeve in a state where the male thread portion is in contact with the male screw part so that the holding claw is moved outward. The rotary feeding type eraser device according to claim 4 , wherein the base piece of the slider is provided so as to be bent inward. The rotary feeding type eraser device according to any one of claims 1 to 6, wherein a tail plug is fitted to an end of the main body, and the rotary sleeve is rotatably connected to the tail plug.

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