JPH0995087A - Bar-shaped object rotary propelling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which can be easily manufactured and assembled and can be rotated decently in an advanced manner and in which a bar-shaped object can be surely prevented from being retracted and propelling pitch can be properly ensured. SOLUTION: In a bar-shaped object rotary propelling device comprising an axis cylinder 1 having a helical groove 2 in its inner periphery, an inner axis 4 which is rotatably provided in the cylinder 1, a forward end thereof protruding from the cylinder 1, a slit 6 being formed in the axial direction thereof, and a slider 14 which is engaged with and guided by the groove 2 and an engaging protrusion 18 so as to be axially movable in the cylinder 1, a torque increasing means is provided on the inner periphery of the cylinder 1 and on the outer periphery of the inner axis 4 in opposition to the cylinder 1.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a correction rod, a color core,
The present invention relates to a stick-shaped object rotary feeding device for drawing out various cursive materials such as an eraser and stick-shaped objects such as lipsticks for cosmetics by a rotating operation.

[0002]

2. Description of the Related Art Conventionally, various types of rod-shaped material feeding tools have been proposed. However, conventionally, for example, a writing instrument described in Japanese Utility Model Publication No. 52-35736, in consideration of preventing the rod-shaped object from retracting when a writing pressure is applied, the axis of the spiral groove formed inside the barrel is conventionally considered. The inner angle with respect to is increased to form about 70 ° to 80 °. Therefore, it takes time and effort to perform screw processing as the secondary processing or to rotate the core pin in the case of molding.

Therefore, in order to form a spiral groove without rotating the core pin at the time of molding, the angle of the spiral groove is 50 ° or less with respect to the axis (45 ° is the most ideal in consideration of a proper payout stroke). However, the biggest problem is how to prevent the stick-like object from returning when the writing pressure is applied, especially when excessive writing pressure is applied.

[0004]

In such a conventional example, when pressure is applied to the tip of the rod-shaped object,
The slider reversely rotates in the spiral groove and retracts in the slit, resulting in the inconvenience that the rod-like object sinks into the barrel. Furthermore, especially in the case where the rod-shaped material is easily dried, consideration of airtightness was not sufficient.

Therefore, the present invention has an airtight structure which is easy to process and assemble, and reliably prevents the rod-like object from returning. Moreover, it provides a solid feeling and a high-class feeling to the rotating operation and is ideal for feeding out the rod-like object. An object of the present invention is to provide a stick-shaped object feeding tool that secures a pitch and has good operability.

[0006]

In order to achieve the above object, according to the present invention, a shaft cylinder having a spiral groove formed on the inner periphery thereof, and a tip portion protruding from the shaft cylinder are rotatable in the shaft cylinder. A rod-shaped object rotary feeding device comprising an inner shaft provided with a slit formed in the axial direction and a slider that is engaged with and guided by the spiral groove and the slit and is movable in the axial direction in the axial cylinder. There is provided a rod-shaped object rotary feeding tool characterized in that torque increasing means is provided on the inner peripheral portion of the shaft cylinder and the outer peripheral portion of the center shaft corresponding to the inner peripheral portion.

Further, according to the present invention, the shaft cylinder having the spiral groove formed on the inner periphery thereof, and the distal end portion projecting from the shaft cylinder are rotatably provided in the shaft cylinder and the slit is formed in the axial direction. In a rod-shaped object rotary feeding tool comprising a center shaft and a slider which is engaged / guided with the spiral groove and the slit and is movable in the axial direction in the axial cylinder, in the inner peripheral portion of the axial cylinder and the inner peripheral portion thereof. A torque increasing means is provided on the corresponding outer peripheral portion of the center shaft, the spiral groove has an internal angle of 50 ° or less with respect to the axis, and the torque increasing means is a fitting means for detenting the slider. A stick-shaped object rotary feeding device is obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 5 show a rod-shaped object rotary feeding device according to Embodiment 1 of the present invention. In the figure, a pitch is formed at an angle such that the double spiral groove 2 has an internal angle of 50 ° or less with respect to the axis inside a barrel 1 that is gripped by a user, and the front portion of the barrel 1 has a thin engagement wall. The part 3 is formed.

A center rod 4 is rotatably fitted in the barrel 1. The center shaft 4 has a large number of concavo-convex lines 5 on the outer circumference of the front part for preventing slipping in the axial direction, and a slit 6 in the axial direction is formed on the rear part. In this form, the central shaft 4
However, it is shorter than Embodiments 3 and 4 of the invention described later, and the slit 6 is a split groove that penetrates to the rear end to form the opening 7. Therefore, there is an advantage that the assembly is easy.

Further, a narrow escape portion 8 is formed in the inner portion of the slit 6 facing the opening 7. In addition,
Since the narrow escape portion 8 functions as a bending allowance at the time of assembly, not only the assembly is facilitated, but also the annular projection 9 and the barrel 1 are provided.
It is formed so as to obtain an appropriate friction feeling effect with the inner peripheral portion. Further, the recess 1 is formed adjacent to the annular projection 9.
0 is provided, and the thick portion 11 is further formed. An annular convex strip 12 as a stopper having a slanted surface portion 13 that is inclined forward is provided at the end of the thick portion 11. Subsequent to the annular projection 12, the large number of projections and depressions 5 are provided in the axial direction.

A slider 14 as shown in FIG. 2 is provided on the barrel 1 and the center rod 4 so as to be movable in the axial direction. In addition, in FIG. 1, the slider 14 is positioned almost at the deepest portion of the shaft cylinder 1, and therefore the rod-shaped object is not shown, but in this case, it is in the retracted position.

More specifically, the slider 14 is provided with two leg portions 15 and four holding pieces 16 as shown in FIG. 2 (C). The two legs 15 are separated from each other by a split groove 17.
Engaging protrusions 18 are formed on the outer sides of the respective slants with inclination so as to engage with the spiral grooves 2 formed on the inner side of the shaft cylinder 1. Therefore, all four of the sandwiching pieces 16 can be slid in the four guide grooves 19 formed at positions different from the slit 6, respectively, so that the upper ends of the sandwiching pieces 16 spread slightly outward in the radial direction. However, this portion does not catch on the upper end of the slit 6 and stop during operation, so that operability is good.

Further, a thick portion 21 is formed adjacent to the inclined portion 20 so as to face the leg portion 15 of the slider 14.
The four clamping pieces 16 are provided at the end of the thick portion 21.
Are integrally formed. More specifically,
Each of the holding pieces 16 has two protrusions 22 formed inside the tip to hold a rod-shaped object.
The tip portion of 6 is formed so as to slightly expand radially outward in the free state.

Next, a cap 23 is detachably attached to the front portion of the barrel 1. The cap 23 has a structure as shown in FIG. 5, and a clip piece 27 is integrally formed on the cap main body 24 to prevent rolling. As shown in FIG. 5A, the inside of the cap body 24 near the opening has a completely airtight structure at its root. That is, in order to achieve airtightness in the thin engaging portion 3 of the shaft cylinder 1 described above, a step portion 25 is formed on the inside slightly separated from the opening end of the cap 23, and further, an annular projection 26 having a dowel-shaped cross section is provided on the inner side thereof. An inclined portion is formed in the back, which is further separated.

The side wall of the cap body 24, which is connected to the clip piece 27 from the substantially middle portion to the rear portion, is shown in FIG.
Since it has an open structure as shown in (B), it has a safety cap structure that is safe even if an infant or the like swallows it. Further, the cap 23 having such a structure has an advantage that it can be formed by a cutting die which is simpler and cheaper than the split die. Further, as shown, this cap 23 forms an airtight seal with the barrel 1.

Therefore, in order to facilitate understanding of the present invention, a procedure for assembling the rod-shaped object rotary feeding device according to the embodiment of the present invention will be described. First, the lower opening 7 of the center shaft 4
From the above, the sandwiching pieces 16 of the slider 14 are inserted into the guide grooves 19 and set. In this case, since the holding piece 16 bends inward or the slit 6 side of the center shaft 4 bends outward, the insertion is smoothly performed. Next, these combined central shafts 4
The slider 1 and the slider 14 are assembled in the barrel 1.
The engaging projection 18 of the leg portion 15 of No. 4 may be fitted into the spiral groove 2 of the shaft cylinder 1 and then the rod-shaped object may be set in the holding piece 16 of the slider 14. If the rod-shaped material is volatile (evaporable), the cap 23 is required, so the cap 23 may be fitted into the upper end of the barrel 1.

The operation of the rod-shaped object rotary feeding device according to the embodiment of the present invention will be described below. First, in order to pay out the rod-shaped object, the cap 23 is removed, the shaft cylinder 1 is held and fixed, and the inner shaft 4 is rotated by the projections and depressions 5 which are the protruding portions of the inner shaft 4. Then, the slider 14 holding the rod-shaped object
Is guided by the spiral groove 2 formed inside the shaft cylinder 1 and the guide groove 19 formed in the center shaft 4 to move up in the shaft cylinder 1 to move to the center shaft 4
The rod-shaped object is gradually fed out from the tip opening of the.

Even when a writing pressure is applied to the rod-shaped object during use, the annular projection 9 formed on the center rod 4 acts as a torque increasing means with the inner wall of the shaft cylinder 1 to prevent the rod-shaped object from returning. Since the slider 14 does not rotate in the reverse direction with respect to the spiral groove 2 because it works, the rod-shaped object does not retract into the barrel 1. After use, the slider 14 is retracted by reversing the tip of the center rod 4 in the opposite manner to the above, so that the rod-like object can be easily stored in the barrel 1. Further, since the annular projection 9 is provided as the torque increasing means on the shaft cylinder 1 and the center shaft 4, the rotating operation is smooth, and a solid feeling or a high-class feeling can be obtained.

Next, a second embodiment of the present invention will be described with reference to FIGS. Incidentally, in FIG. 6, the slider 14 has the shaft cylinder 1.
FIG. 7 is a diagram for clearly showing the difference from the first embodiment of the invention described above.
(A) is a front view of the center shaft 4, and (B) is a side view thereof. As is apparent from comparison with FIG. 4, the pair of opposed slits 6 of the center shaft 4 according to the second embodiment has a closed portion 6a at the lower end thereof, and a pair of opposed split grooves 6b is formed in the middle of the pair of slits 6. Has been done. Therefore, as compared with the slit 6 of the first embodiment, the center shaft 4
The strength can be secured, and when the slider 14 is assembled in the center shaft 4, the split groove 6b bends outward, which facilitates insertion.

FIG. 8 shows a case where the slider 14 is located in the vicinity of the uppermost portion with the cap 23 removed, and the rod-shaped material is shown by a chain double-dashed line. In this form, the center rod 4 is provided in the barrel 1 made of plastic or the like so as to project from the tip opening of the barrel 1. In addition,
A spiral groove 2 having an angle of 50 ° or less with respect to the axis is formed on the inner peripheral wall of the shaft cylinder 1.

Further, an axial guide groove 19 is formed in the center shaft 4, and a slider 14 holding a rod-shaped object is provided in the center shaft 4 so as to be movable in the axis direction. More specifically, the lower outer wall portion of the slider 14 is provided with a pair of engagement protrusions 18 that protrude outward in the radial direction, and the holding piece 16 of the slider 14 engages with the guide groove 19 of the center shaft 4. ,
The tip of the engaging projection 18 is engaged with the double-threaded spiral groove 2 of the shaft cylinder 1.
You are being guided.

FIG. 9 is an enlarged view of a portion indicated by an arrow X in FIG. 8, (A) showing before assembly and (B) showing after assembly. Further, on the outer periphery of the front part of the center shaft 4, the annular ridge 2 is formed.
8 is formed, and the barrel 1 corresponding to the raised portion 28 is formed.
A fitting concave portion 29 is provided on the inner periphery of the fitting concave portion 29 for fitting and crimping the raised portion 28. Therefore, when the center rod 4 is pushed in from above the barrel 1 as shown in FIG. 9 (A), the portion indicated by reference numeral c is formed in advance in a slightly outward direction as indicated by reference numeral b. When assembled in the state of 9 (B), the center shaft 4
Is urged by a stronger force in the direction of the arrow b ', so that a frictional force acts between them and the torque is increased during the rotating operation, so that a solid or high-grade feeling effect can be obtained. In addition, the symbol a in the figure indicates a constant pressure acting on the inner wall of the center shaft 4.

10 to 11 show a third embodiment of the present invention, FIG. 10 shows a case where the slider 14 is located at the deepest portion of the barrel 1, and FIG. 11 shows the cap removed. In the state, the slider 14 is located in the vicinity of the uppermost portion, and the rod-shaped object is indicated by a two-dot chain line. In addition, FIG.
The part indicated by the arrow Y has basically the same structure as in FIGS. 9 (A) and 9 (B). However, in the case of this mode 3, there is an advantage that the center shaft 4 has a bottom, is hardly deformed as a whole, and is desirable in terms of strength.

Further, according to the third embodiment, as is apparent from FIG. 10, the sandwiching piece 16 of the slider 14 is two,
Since it is formed in the same direction as the leg portion 15 and is provided so as to slide in the slit 6, the guide groove 19 is not separately required.

12 to 13 show a fourth embodiment of the present invention, in which the slider 1 is shown with the cap removed.
4 is located in the vicinity of the uppermost part of the shaft cylinder 1,
The dotted chain line indicates a bar. Further, FIG. 13 shows an arrow Z in FIG.
It is an enlarged view of the part shown by (A) shows before assembly, (B) shows after assembly. In this case, the central shaft 4
Has the advantage that it has a bottom and is difficult to deform as a whole. The Z portion of FIG. 12 will be described in more detail with reference to FIG. The wall thickness on the inner side of the upper portion of the shaft cylinder 1 is formed to be slightly thinner toward the lower side, while the raised portion 33 slightly protruding outward is formed on the outer side of the upper side of the center rod 4.

In this case, as shown in FIG. 13 (A), the raised portions 33 are formed at the intervals indicated by the reference sign g, and the portion indicated by the reference sign f is a dent and is indicated by the reference sign e. Biased in the direction. Therefore, when it is incorporated as shown in FIG. 13 (B), the pressures indicated by e ′ and h ′, which are stronger forces, are applied in the arrow direction, so that the rotational torque is enhanced. In the figure, the symbol i indicates a constant pressure.

In the above description of the embodiments of the invention, the spiral groove 2 formed on the inner periphery of the shaft cylinder 1 has two threads, but may have one thread.
Also, the internal angle with the axis of the spiral groove 2 formed on the inner circumference of the shaft cylinder 1 has been described as being 50 ° or less, but consideration is given to the ease of processing or molding of the shaft cylinder and the suitability of the feeding stroke of the rod-shaped material. Then, those of 30 ° to 50 ° are preferable.

[0028]

Since the structure of the present invention is as described above, in the rod-shaped object rotary feeding device, the torque-increasing function is added to the rotating operation to surely prevent the rod-shaped object from returning, and at the same time, to provide a solid feeling or a high-class feeling. It is possible to improve the operability of rotation by virtue of the sensational touch effect, to appropriately obtain the stroke for extending the rod-shaped object, and to achieve a simple airtight structure.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a rod-shaped object rotary feeding device according to a first embodiment of the present invention.

2A and 2B show the slider of FIG. 1, in which FIG. 2A is a front view thereof, FIG. 2B is a sectional view thereof, and FIG.

FIG. 3 is a cross-sectional view showing the barrel of FIG.

4 shows the center axis of FIG. 1, (A) is a front view thereof, (B) is a longitudinal sectional view thereof, and (C) is an enlarged sectional view taken along the line AA.

5 shows the cap of FIG. 1, (A) is a longitudinal sectional view thereof, and (B) is a bottom view thereof.

FIG. 6 is a vertical sectional view according to a second embodiment of the invention of a rod-shaped object rotary feeding device according to the present invention.

FIG. 7 shows the center shaft of FIG. 6, (A) is a front view thereof, and (B) is a side view thereof.

8 is a vertical sectional view showing another state in which the cap of FIG. 6 is removed.

9 is an enlarged explanatory view of a portion X of FIG. 8, (A)
FIG. 4B is a sectional view showing a state before assembly, and FIG. 7B is a sectional view showing a state after assembly.

FIG. 10 is a vertical cross-sectional view of a rod-like object rotary feeding device according to a third embodiment of the present invention.

11 is a vertical cross-sectional view showing another state in which the cap of FIG. 9 is removed.

FIG. 12 is a vertical cross-sectional view of a rod-shaped object rotary feeding device according to a fourth embodiment of the present invention.

13 is an enlarged explanatory view of a portion Z in FIG. 12,
(A) is a cross-sectional view showing a state before assembly, and (B) is a cross-sectional view showing a state after assembly.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Spiral groove 3 Thin part for engagement 4 Middle shaft 5 Concavo-convex strip 6 Slit 6a Closing part 6b Split groove 7 Opening 8 Narrow relief 9 Ring projection 10 Recess 11 Thick section 12 Annular projection 13 Slope 14 Slider 15 Engagement leg 16 Clamping piece 17 Split groove 18 Engagement protrusion 19 Guide groove 20 Inclined portion 21 Thick portion 22 Protrusion 23 Cap 24 Cap body 25 Step portion 26 Annular protrusion 27 Clip piece 28 Annular raised portion 29 Fitting concave portion 30 Convex part 31 Protruding part 32 Stopper step part 33 Raised part

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[Procedure amendment]

[Submission date] January 11, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

11 is a vertical cross-sectional view showing another state in which the cap of FIG . 10 is removed.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

[Fig. 2]

[Figure 5]

[Figure 3]

FIG. 4

FIG. 6

FIG. 7

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 11

FIG.

FIG. 13

Claims (13)

[Claims] 1. A shaft cylinder having a spiral groove formed on an inner circumference thereof, a center shaft having a tip portion protruding from the shaft cylinder so as to be rotatable in the shaft cylinder and having a slit formed in the axial direction, and the spiral. In a rod-shaped object rotary feeding device comprising a slider which is engaged and guided by a groove and a slit and is movable in the axial direction in the axial cylinder, an inner peripheral portion of the axial cylinder and the inner shaft of the intermediate shaft corresponding to the inner peripheral portion. A rod-shaped object rotary feeding device, wherein a torque increasing means is provided on the outer peripheral portion. 2. The spiral groove is 5 with respect to the axis of the barrel.
2. An internal angle of 0 [deg.] Or less, and the torque increasing means is a fitting means for detenting the slider.
The described stick-shaped object rotary feeding tool. 3. The torque increasing means includes a fitting concave portion formed on an inner peripheral portion of an upper portion of the shaft cylinder, and a fitting convex portion formed on an outer peripheral portion of the center shaft corresponding to the fitting concave portion. The rod-shaped object rotary feeding device according to claim 1, which comprises 4. The torque increasing means includes a fitting convex portion formed on an upper inner peripheral portion of the shaft cylinder, and a fitting concave portion formed on an outer peripheral portion of the center shaft corresponding to the fitting convex portion. The rod-shaped object rotary feeding device according to claim 1, which comprises 5. The rod-shaped object rotary feeding device according to claim 1, wherein the torque boosting means is provided on a lower inner peripheral portion of the shaft cylinder and a corresponding lower central outer peripheral portion of the shaft. 6. The rod-like object rotary feeding tool according to claim 5, wherein the torque enhancing means is an outwardly protruding portion formed on the outer peripheral portion of the rear portion of the center shaft. 7. The rod-shaped object rotary feeding device according to claim 6, wherein a lateral width of a slit formed in the central shaft corresponding to the raised portion at the rear portion of the central shaft is enlarged. 8. The slider has a plurality of holding pieces for holding a rod-shaped object at an upper end thereof, and these holding pieces are engaged with guide grooves formed inside the center shaft separately from the slits. The rod-shaped object rotary feeding device according to claim 1, further comprising: 9. The rod-shaped object rotary feeding device according to claim 1, wherein a rear end of the slit of the center shaft is opened. 10. The rod-shaped object rotary feeding tool according to claim 1, wherein a split groove is formed at a rear end portion of the slider. 11. The rod-shaped object rotary feeding device according to claim 1, further comprising a removable cap that forms an airtight seal with the shaft cylinder. 12. The rod-shaped object rotary feeding tool according to claim 11, wherein a rear end surface of a rear portion of a clip provided on the cap and a cap body is opened to form a safety cap. 13. The rod-like object rotary feeding tool according to claim 1, wherein a narrow relief portion is formed in the inner portion of the slit.