JP2011178000A - Coupling structure between shafts of stationery, cosmetic implement and oral cavity hygienic implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rotate relatively more than one turn in a screwed structure with a screw, and since it is necessary to change the position when attaching, the operation is troublesome. There was a fear.
In addition, in the fitting structure with the stepped-over stepped part, the fitting load varies, causing problems such as hard mounting or inadvertent disconnection.
In addition, in the structure in which the other engaging projection is moved and engaged with the one recessed groove and the locking hole, there is a possibility that it may be easily detached, and there is a problem that looseness due to clearance occurs. It was. In addition, there is a problem that the locking hole impairs the appearance.
A shaft-to-shaft structure in which an engagement receiving portion is formed on the inner surface of one shaft and an engagement portion that engages with the engagement receiving portion is formed on the outer surface of the other shaft. A stationery in which an elastic body in which the shafts are urged between the shafts is interposed between the shafts, and a connecting structure between the shafts of the cosmetic tools and the oral hygiene tools.
[Selection] Figure 1

Description

  The present invention relates to a container attachment / detachment structure, and more particularly to a shape of a shaft cylinder that can be easily and reliably attached to and removed from another shaft cylinder.

  In order to reliably open and close the lid regardless of whether the conventional container is hermetically sealed, a screwed structure using screws or a fitting structure using climbing steps provided to each other has been used. Further, there is a structure in which a convex portion provided on the outer periphery of the other shaft cylinder is moved and engaged with a concave groove and a locking hole provided on the rear portion of one shaft cylinder.

JP 2008-93843 A

However, these conventional techniques generally rotate more than one turn in a screwed structure with screws, and it is inconvenient to operate because it is necessary to change the position when attaching. There was a risk of getting out of order.
In addition, in the fitting structure with the stepped-over stepped part, the fitting load varies, causing problems such as hard mounting or inadvertent disconnection.
Further, in the structure in which the other engaging projection is moved and engaged with the one recessed groove and the locking hole, there is a possibility that it may be easily detached, and there is a problem that rattling due to the clearance occurs. there were. In addition, there is a problem that the locking hole impairs the appearance.

  According to the present invention, in a shaft cylinder of a container, an engagement groove is formed inside one shaft cylinder, and an engagement protrusion is formed outside the other shaft cylinder. It is characterized in that elasticity that attracts or separates from each other is provided integrally or separately.

  According to the present invention, in a shaft cylinder of a container, an engagement groove is formed inside one shaft cylinder, and an engagement protrusion is formed outside the other shaft cylinder. Since the elasticity that attracts or separates from each other is provided integrally or separately, it is easy to install and remove, and it does not come off carelessly, and it does not rattle and impair the appearance It is.

The perspective view which shows 1st Example. The principal part detail drawing of 1st Example. (A) An exploded external view of the first embodiment. (B) The longitudinal cross-sectional view of Fig.3 (a). FIG. 2 is a component diagram of the first embodiment. (A) The perspective view which shows 2nd Example. (B) The expansion perspective view of a cap. The component figure of 2nd Example. The perspective view which shows 3rd Example. Part drawing of the third embodiment. The perspective view which shows 4th Example. Part drawing of the fourth embodiment. The perspective view which shows 5th Example. FIG. 10 is a component diagram of the fifth embodiment. The external view which shows 6th Example. FIG. 14 is a longitudinal sectional view of FIG. 13. FIG. 14 is a cross-sectional view of FIG. 13. (A) The principal part enlarged view of FIG. (B) The principal part expansion perspective view of 6th Example. The external view which shows the use condition of 6th Example. The external view which shows the use condition of 6th Example. The external view which shows 7th Example. The longitudinal cross-sectional view of FIG. FIG. 20 is a cross-sectional view of FIG. 19. (A) The principal part enlarged view of FIG. (B) The principal part expansion perspective view of 7th Example. The external view which shows the use condition of 7th Example. The external view which shows the use condition of 7th Example.

A mode for carrying out the present invention will be described with reference to the drawings (first embodiment). 1 to 4 show a first embodiment of the present invention. This example is an example of a structure for attaching and detaching a shaft cylinder and a tip and used for a writing instrument. Not only a writing instrument, but also a connecting structure of a brush made of sponge or fiber bundle and a handle connecting the brush, or other tools for extending the handle of a tool such as a cosmetic tool or a spanner. A connection structure for connecting the handles may be used.
Examples of the writing instrument include a ballpoint pen, a sign pen, a drawing brush, a brush pen, a mechanical pencil, and a fountain pen. A large-diameter portion 1a is formed in the vicinity of the tip of the inner surface of the shaft tube 1, and a rear portion from the large-diameter portion is a small-diameter portion 1b. On the inner surface of the front portion of the small-diameter portion, substantially U-shaped concave grooves 2 are formed at two locations facing each other, but the number is not limited to two locations, and may be three. However, they are preferably formed at radially spaced positions. The concave groove 2 includes a rear groove portion 2a formed rearward from the front end portion of the small-diameter portion 1b, a circumferential groove portion 2b formed in the circumferential direction by bending 90 degrees from the rear groove portion 2a, and the circle The front groove portion 2c is formed 90 degrees forward from the circumferential groove portion 2b, but the front end portion of the front groove portion 2c does not reach the front end portion of the small diameter portion 1b. That is, the front groove portion 2c does not reach the large diameter portion 1a. Further, a chamfering process (chamfered portion 1d) is formed at the end of the projection 1c formed between the rear groove portion 2a and the front groove portion 2c on the circumferential groove portion 2b side.
In addition, a tip 3 is detachably attached to the front portion of the barrel 1 and a ballpoint pen tip is fixed to the tip of the tip 3. It may be. A tapered conical portion 3a is formed at the front portion of the tip 3 and an attachment tube portion 3b having a smaller diameter than the rear end portion of the conical portion 3a is formed at the rear portion of the conical portion 3a. . And the rectangular engagement protrusion 4 engaged with the said ditch | groove 2 is installed in the outer peripheral surface of the attachment cylinder part 3b in two places, The three corner | angular parts of the engagement protrusion 4 The chamfered portion 4a is slightly formed on the surface. By forming the chamfered portion 4a, the chamfered portion 4a located in the rear serves as a guide portion for insertion into the rear groove 2a and the circumferential groove 2b, and the chamfered portion 4a located in the front is It becomes a guide part at the time of removing the advance 3. In addition, the corner | angular part 4b in which the chamfer part 4a is not formed is provided in the rear-end part side of the said cone part 3a. By forming the corner portion 4b at one corner of the engaging protrusion 4, a large contact area with the stepped portion 2cc of the front groove portion 2c can be taken in the engaged state, and the protrusion 1c of the engaging protrusion 4 is obtained. As a result, the tip 3 is prevented from wobbling with respect to the barrel 1.
Further, a circumferential groove portion 3c is formed at a front end portion of the mounting cylinder portion 3b of the tip metal 3, that is, a connecting portion with the conical portion 3a, and an annular ring called an O-ring is formed in the circumferential groove portion 3c. An elastic body 5 is attached. The elastic body 5 called O-ring is made of rubber-like elastic material such as silicone rubber, nitrile rubber, urethane rubber, styrene butadiene rubber, etc., but is made of a resin material having elasticity called thermoplastic elastomer. May be. The cross-sectional shape of the elastic body 5 is circular, but may be a square shape such as a square or a rectangle, or may be an elliptical shape.

  The elastic body 5 comes into contact with the front end surface portion 1e of the small-diameter portion 1b of the shaft tube 1 when the shaft tube 1 and the tip 3 are connected to each other. It is also in contact with the inner surface of 1a in a pressed state. Further, the inner diameter of the small diameter portion 1 b of the shaft tube 1 is substantially the same as the outer diameter of the mounting tube portion 3 b of the tip 3. That is, by causing the elastic body 5 of the tip 3 and the mounting tube portion 3 b to contact the inner surface of the shaft tube 1, the wobbling and shaking of the tip 3 with respect to the shaft tube 1 are prevented.

Next, the connection / engagement operation between the shaft tube 1 and the tip 3 will be described. When attaching the tip 3 to the shaft tube 1, the engagement protrusion 4 of the tip 3 is positioned in the rear groove 2 a of the groove 2 extending to the end surface of the small diameter portion 1 b of the shaft 1, and is engaged. The projection 4 is inserted into the shaft tube 1 until it hits the step 2aa of the rear groove 2a. At this time, the tip 3 is inserted into the shaft tube 1 until the elastic body 5 is compressed and deformed in the longitudinal direction of the shaft tube 1. Next, the tip 3 is rotated clockwise in FIG. 2 until it contacts the step 2bb of the circumferential groove 2b. Here, when the tip 3 is moved away from the hand, the tip 3 moves forward due to the restoring force of the elastic body 5. Move until it reaches 2cc step 2cc. In this state, the attachment of the tip 3 to the shaft cylinder 1 is completed. Note that the engagement protrusion 4 of the tip 3 attached to the shaft cylinder 1 is sandwiched between the step 2bb and the protrusion 1c of the circumferential groove 2b. The relative rotation of is limited. When removing the tip 3 from the shaft tube 1, an operation opposite to the above operation is performed.
In this example, an elastic body 5 is interposed between the shaft tube 1 and the tip 3 so that they are urged to each other. It is better to be able to move back and forth with respect to the tube 1. The elastic body 5 is prevented from being deteriorated with time and cracks due to stress concentration on the engaging protrusions 4 and the stepped portion 2 cc are also prevented, so that a stable connected state can be maintained over time.
Further, as shown in this example, by forming the concave groove 2 in the small diameter portion 1b of the shaft tube 1, the engagement portion is not exposed to the outside because it engages with the tip metal on the inner surface of the shaft tube. The effect that it looks good is produced.

Next, a second embodiment shown in FIGS. 5 and 6 will be described. This example is an example of a container that is a detachable structure of a shaft cylinder and a middle shaft. In front of the center shaft, the cursive body may be attached as in the first embodiment, but a toothbrush or eyeliner brush portion may be attached, or a wrench, cutter, scribing, etc. A tool such as a needle may be attached.

A large-diameter portion 6a is formed near the tip of the inner surface of the shaft tube 6, and a small-diameter portion 6b is formed behind the large-diameter portion 6a. The small-diameter portion 6b is formed with two rectangular recesses 7 facing each other, and the large-diameter portion 6a has a V-groove 8 cut out from the front end portion of the large-diameter portion 6a. It is formed at two opposing positions.
On the other hand, a flange 9a is formed in the middle portion of the middle shaft 9, and an engagement protrusion 10 that engages with the recess 7 and a V-groove 8 are formed behind the flange 9a. Engaging V protrusions 11 are formed at two opposing positions. Further, through grooves 9b are formed at the front and rear positions of the concave portion 7, and the vicinity of the engagement protrusion 10 can be deformed flexibly toward the inner diameter direction. However, it can be flexibly deformed.
The distance X from the rear end surface 9c of the flange portion 9a to the front end surface 10a of the engaging projection 10 is the distance Y from the front end surface 7a of the groove 7 formed in the shaft cylinder 1 to the front end surface 6a of the shaft cylinder 1. It is formed shorter. That is, when the middle shaft 9 is connected to the shaft tube 6, the through hole 9b formed in the front is compressed.
Incidentally, when the middle shaft 9 is attached to the shaft tube 6, the middle shaft 9 is inserted straight into the shaft tube 6 after the V protrusion 11 is aligned with the V groove 8. At this time, the vicinity of the engagement protrusion 10 is deformed in the inner diameter direction by the through-holes 9b formed before and after the engagement protrusion 10. Further, when the intermediate shaft 9 is pushed in, the engaging projection 10 is positioned in the recess 7 and is restored by its own elastic restoring force and is fitted into the recess 7. At the same time, the rear end surface portion of the flange portion 9 a of the middle shaft 9 comes into contact with the front end surface of the shaft tube 6. A snapping sound is emitted at the moment of fitting and at the moment of contact of the flange 9a, and the completion of attachment can be recognized. When the shaft cylinder 6 and the middle shaft 9 are connected, the through-hole 9b formed in the front is compressed, and rattling between the shaft cylinder 6 and the middle shaft 9 is prevented.
When removing the middle shaft 9 from the shaft tube 6, the middle shaft 9 is rotated around the central axis in the longitudinal direction of the middle shaft 9. The slope 11a of the V projection 11 of the middle shaft 9 moves in a direction protruding from the shaft cylinder 6 along the slope 8a of the V groove 8, and can be easily removed by this action.

Next, a third embodiment shown in FIGS. 7 and 8 will be described. This example is an example related to a container, which is a structure for attaching and detaching a shaft cylinder and a cap, as in the second embodiment. A large diameter portion 12a is formed near the tip of the inner surface of the shaft cylinder 12, and a small diameter portion 12b is formed behind the large diameter portion 12a. In the small diameter portion 12b, rectangular concave portions 13 are formed at two opposing positions.
On the other hand, the intermediate shaft 14 is formed with two engaging projections 15 that engage with the concave portion 13, and between the opposing engaging projections 15 in the longitudinal direction of the intermediate shaft 14. The slits 16 are formed at two locations facing each other. That is, the vicinity of the engaging protrusion 15 can be bent and deformed in the inner diameter direction. A flange 17 is formed on the circumference of the middle shaft 14, and the elastic body 5 is attached so as to contact the rear end surface of the flange 17.
When attaching the middle shaft 14 to the shaft cylinder 12, the rear part of the middle shaft 14 is picked with a finger or the like, bent toward the inner diameter direction, and the elastic body 5 positioned behind the flange portion 17 of the middle shaft 14 is attached to the shaft cylinder 12. Until it is in contact with the end face 18 and compressed. Thereafter, the engagement protrusion 15 is positioned in the recess 13 and the vicinity of the engagement protrusion 15 is restored by its own elastic restoring force. At this time, a snapping sound is emitted and the attachment is completed.
When removing the middle shaft 14 from the shaft cylinder 12, the middle portion of the middle shaft 14 is picked with a finger and the slit 16 is bent toward the inner diameter direction. By this bending action, the engagement action between the engagement protrusion 15 and the recess 13 is released, and the middle shaft 14 and the shaft tube 12 can be detached.

Next, a fourth embodiment shown in FIGS. 9 and 10 will be described. This example is also an example relating to a container, which is a structure for attaching and detaching a shaft cylinder and a cap, as in the second embodiment. Inside the shaft tube 19, switchback-shaped recesses 20 each having a continuous “KU” shape are formed at two locations facing from the front end portion of the shaft tube 1 toward the rear.
On the other hand, the middle shaft 21 is formed with two columnar engaging protrusions 22 that engage with the concave portion 20 at opposite positions. In addition, a collar portion 21 a is formed on the circumference of the middle portion of the middle shaft 21.
When attaching the middle shaft 21 to the shaft cylinder 19, first, the engagement protrusion 22 is inserted straight in alignment with the introduction groove 20 a of the recess 20, and then the engagement protrusion 22 is continuously inserted into the “ku” -shaped recess. 20 is rotated and counter-rotated until it contacts the rotation end 20b, 20c, 20d, 20e. The attachment is completed when the engagement protrusion 22 reaches the engagement end 20f of the recess 20, but in the process of the engagement protrusion 22 reaching the engagement end 20f from the rotation end 20e, The attachment is completed when the portion 21a comes into contact with the front end portion of the shaft tube 19 and the flange portion 21a comes into contact therewith. Here, when the middle shaft 21 is further rotated, the engagement protrusion 22 rotates while being deformed, and the contact / engagement force with the shaft tube 19 becomes stronger.
Note that when the middle shaft 21 is removed from the shaft cylinder 19, the above-described mounting operation is reversed.

Next, a fifth embodiment shown in FIGS. 11 and 12 will be described. This example is also an example relating to a container, which is a detachable structure of a shaft cylinder and a middle shaft, as in the second embodiment. On the inner surface of the shaft cylinder 23, substantially M-shaped convex portions 24 are formed at two positions facing each other. A concave portion 24a is formed on the rear surface of the convex portion 24, and inclined surfaces 24b are formed on both sides.
On the other hand, a cylindrical engagement protrusion 26 is formed on the middle shaft 25, and a collar portion 28 is formed on the intermediate portion. And between these engagement protrusions 26 and the collar part 28, the slit 27 is formed in two places where the circumferential direction opposes.
When attaching the middle shaft 25 to the shaft tube 23, the middle shaft 25 is inserted until the collar portion 28 abuts against the front end surface 29 of the shaft tube 23. In the insertion process, the middle shaft 25 is relatively relative to the shaft tube 1. Rotate to At this time, the engaging protrusion 26 climbs over the inclined surface 24b of the convex part 24, and the slit 27 is expanded in the process of climbing over. When the relative rotation with respect to the shaft cylinder 23 of the middle shaft 25 is further performed, the engaging protrusion 26 is fitted into the concave portion 24 a of the convex portion 24. At this time, the vicinity of the engaging protrusion 26 is restored by its own elastic restoring force, a snapping sound is generated, and the attachment is completed, but the slit 27 is not completely restored, and is incompletely restored. ing. That is, due to the incomplete restoration, the restoring force remains, and the flange portion 28 of the middle shaft 25 is continuously urged toward the front end surface of the shaft tube 23.
When removing the middle shaft 25 from the shaft tube 23, the middle shaft 25 is slightly rotated with respect to the shaft tube 23.

Examples applied based on the above Examples 1 to 5 are shown below. 13 to 18 show a sixth embodiment applied based on the first embodiment of the present invention. This example is an example in which the barrel 1, the front shaft 30 and the cap 31 are attached and detached and used for a writing instrument. A description of the same parts as those in the first embodiment will be omitted.
Examples of writing instruments include ballpoint pens, markers, and fountain pens. A front shaft 30 is attached to the shaft cylinder 1 by the same engagement structure as in the first embodiment. The cross-sectional shape of the front shaft 30 is a flat shape (flat portion 30b) having a substantially elliptical shape formed at a position where the linear portions face each other. A fitting rib 30a is provided on the outer periphery of the front shaft 30 in a circumferential shape, and a plurality of fitting protrusions 31a that are detachably engaged with the fitting rib 30a are provided on the inner surface of the cap 31. Yes.
Further, plate-like ribs 31b are provided on the inner surface of the cap 31 in four directions, and are arranged so as to sandwich the flat portion 30b of the front shaft 30. At this time, the tip of the plate-like rib 31b may be brought into contact with the outer surface of the flat portion 30b. However, considering the attachment / detachment of the cap 31, it is preferable that a slight gap be formed.
A pen nib 32 is fixed and disposed on the front shaft 30 by means such as press fitting so as to be exposed on the writing tip side (upper side in the drawing). On the other hand, an ink storage unit 33 is disposed on the inner side (lower side in the drawing) of the front shaft 30. An outer periphery 33a of the ink storage portion 33 is in press contact with an inner surface rib 30c formed on the inner surface of the front shaft 30, but is detachably attached.
On the other hand, a substantially U-shaped groove 2 is formed on the inner surface of the shaft tube 1 in the same manner as in the first embodiment, and is a rectangle that is detachably engaged with the substantially U-shaped groove 2. An engaging protrusion 4 is formed on the outer peripheral surface of the front shaft 30.
Next, the usage method will be described. The cap 31 is attached by fitting over the fitting protrusion 31a and the fitting rib 30a of the front shaft 30. When force is applied in the direction in which the cap 31 is pulled straight out from the front shaft 30 from the fitted state, the fitting between the fitting protrusion 31a of the cap 31 and the fitting rib 30a of the front shaft 30 is released, and the pen tip 32 is released. Will be exposed and the user will be able to write normally.
The engagement / disengagement operation between the shaft cylinder 1 and the front shaft 30 is as described in the first embodiment. Here, in the present embodiment, since the plate-like rib 31b of the cap 31 is formed so as to sandwich the flat portion 30b of the front shaft 30, relative rotation between the cap 31 and the front shaft 30 is prevented. Has been. Therefore, the engagement / disengagement operation between the shaft cylinder 1 and the front shaft 30 can be performed with the cap 31 fitted to the front shaft 30. In other words, it is possible to replace the ink storage unit 33 built in the shaft cylinder 1 while being attached to the cap 31 via the front shaft 30.

Furthermore, the Example applied based on Examples 1-5 is shown below. 19 to 22 show a seventh embodiment applied to the first embodiment of the present invention in the same manner as the sixth embodiment. This example is an example of a detachable structure of the shaft tube 1, the middle shaft 34 and the cap 35, which is used for cosmetics. A description of the same parts as those in the first embodiment will be omitted. An example of the cosmetic is a mascara container.
An intermediate shaft 34 is attached to the shaft cylinder 1 by the same engagement structure as in the first embodiment. A fitting rib 34 a is provided on the outer periphery of the middle shaft 34 in a circumferential shape, and a plurality of fitting protrusions 35 a that are detachably engaged with the fitting rib 34 a are provided on the inner surface of the cap 35.
Further, on the inner surface of the cap 35, plate-like ribs 35b are provided in four directions, and are arranged in a state of sandwiching the flat portion 34b of the center shaft 34.
A trimming brush 36 is integrally disposed on the middle shaft 34 by press-fitting or the like in the upper part in the figure, while a screw brush 37 is integrally attached to the inner side (lower part in the figure) of the middle shaft 34. It has been.
On the other hand, a substantially U-shaped groove 2 is formed on the inner surface of the shaft tube 1 in the same manner as in the first embodiment, and is a rectangle that is detachably engaged with the substantially U-shaped groove 2. An engaging protrusion 4 is formed on the outer peripheral surface of the intermediate shaft 34.
Next, the usage method will be described. The cap 35 is attached by fitting over the fitting protrusion 35a and the fitting rib 34a of the center shaft 34. When force is applied in the direction in which the cap 35 is pulled straight out from the middle shaft 34 from the fitted state, the fitting between the fitting projection 35a of the cap 35 and the fitting rib 34a of the middle shaft 34 is released, and the adjusting brush 36 is removed. Exposed.

The engagement / disengagement operation between the shaft cylinder 1 and the middle shaft 34 is as described in the first embodiment.
Here, in the present embodiment, the plate-like rib 35b of the cap 35 is formed so as to sandwich the flat portion 34b of the middle shaft 34 even when the cap 35 remains fitted to the middle shaft 34. The relative rotation between the cap 35 and the middle shaft 34 is prevented. Therefore, the engagement / disengagement operation between the shaft cylinder 1 and the middle shaft 34 can be performed with the cap 35 fitted to the middle shaft 34. Thereby, it is possible to use the screw brush 37 in the state attached to the cap 35 via the center shaft 34.

1 shaft cylinder

2 concave groove 3 tip 4 engagement protrusion 5 elastic body 6 shaft cylinder 7 recess 8 V groove 9 middle shaft 10 engagement protrusion 11 V protrusion 12 shaft cylinder 13 recess 14 middle shaft 15 engagement protrusion 16 slit 17 step 18 end surface 19 shaft Cylinder 20 Jagged recess 21 Middle shaft 22 Engaging projection 23 Shaft cylinder 24 Convex portion 25 Middle shaft 26 Engaging projection 27 Slit 28 Step 29 End surface 30 Front shaft 31 Cap 32 Nib 33 Ink storage section 34 Central shaft 35 Cap 36 Adjusting brush 37 Screw Brush 38

Claims (3)

  A shaft-to-shaft structure in which an engagement receiving portion is formed on the inner surface of one shaft and an engagement portion that engages with the engagement receiving portion is formed on the outer surface of the other shaft. The stationery which interposed the elastic body by which each axis | shaft is urged | biased between the axis | shafts, and the connection structure of the axis | shafts of a cosmetics tool and an oral hygiene tool.   The stationery according to claim 1, wherein the shaft is connected by relative rotation and the elastic body is an annular member, and the shaft-shaft connection structure of a cosmetic tool and an oral hygiene tool.   The stationery according to claim 1 or 2, wherein an inner surface of the shaft on which the engagement receiving portion is formed is composed of a large diameter portion and a small diameter portion, and the engagement receiving portion is formed in the small diameter portion. , And a connecting structure between the shafts of cosmetic tools and oral hygiene tools.