JP4369171B2 - Clamping structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a clamping structure applied to a writing instrument, a cosmetic tool, a stationery clip, or the like as a structure for sandwiching paper or cloth, and more particularly to a clamping structure suitable as a structure of a shaft tube and a clip portion in a writing instrument.
[0002]
[Prior art]
Conventionally, in this type of invention, for example, as described in Patent Document 1, the front end side ball portion of the clip (5) of the writing instrument is constituted by an elastic member (6) having rubber-like elasticity, There is a writing instrument that prevents the object to be clamped between the elastic member (6) and the shaft tube (2) from easily coming off.
[0003]
However, according to the above prior art, as shown in FIGS. 1, 3, and 4 of Patent Document 1, the elastic member (6) is configured to be substantially in contact with the shaft cylinder (2). The elastic member (6) made of elastomer resin or the like is deteriorated over time, and the component is adhered to the outer peripheral surface of the shaft tube (2) due to a phenomenon that the component shifts to the shaft tube (2) made of synthetic resin material or the like. May end up. In this case, the gap between the clip (5) and the shaft tube (2) cannot be easily opened, and there is a problem that the object to be clamped cannot be sandwiched therebetween.
Further, as shown in FIG. 2 of Patent Document 1, the elastic member (6) is bonded to the shaft tube (2) by providing a slight clearance between the elastic member (6) and the shaft tube (2). However, in this case, it is difficult to maintain the clearance constant due to variations in component dimensions, and the elastic member (6) contacts the shaft cylinder (2) as described above. It may happen.
Therefore, it is conceivable that the clearance is set to be large so that the contact does not occur due to variations in component dimensions or the like, but in this case, a relatively thin object cannot be sandwiched or cannot be sandwiched. Even so, there was a problem that the clamping force was weakened.
[0004]
[Patent Document 1]
[Patent Document 1] Japanese Patent Laid-Open No. 2001-191685
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved is that the elastic clamping portion can exert the retaining action of the object to be clamped and the elastic clamping portion is bonded to the opposing clamping member. An object of the present invention is to provide a sandwiching structure that can prevent the occurrence of this.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention urges two clamping members so that the gap between them is narrowed, so that the clamping part of one clamping member is sandwiched between the clamping parts of the other clamping member. In the holding structure for holding the object to be held, both of the two holding members are provided with a hard contact portion made of a hard material so as to come into contact with each other when the holding portion is narrowed. And at least one of the two clamping members is made of an elastic material so as not to come into contact with the clamping member which is disposed at the clamping part and is opposed when the gap between both the clamping parts is narrowed. An elastic clamping part is provided, and one of the clamping members is a shaft tube of the writing instrument, and the other clamping member is a clip part of the writing instrument, and the clip part includes a front end part and a rear end part. Alternately with the cylinder So that the portion between the front end portion and the rear end portion is supported by the shaft tube so that the clip portion is disposed on the front end side and the outer surface on the rear end side. And having an elastic knob portion made of an elastic material, integrally connecting the elastic pinching portion and the elastic knob portion by a connecting portion, and integrally forming the elastic pinching portion, the elastic knob portion, and the connecting portion. and said that you are.
[0007]
Here, the two clamping members include a writing tube shaft and its clip portion, a makeup tool shaft tube and its clip portion, and other stationery pinching tools.
The hard contact portion may be configured substantially entirely in a portion of the clamping member excluding the elastic clamping portion, or may be partially configured in the same portion.
Similarly, the elastic clamping portion may be configured substantially entirely at a portion of the clamping member excluding the hard contact portion, or may be partially configured at the same location. May be.
Moreover, the said elastic clamping part may be provided only in one of the said two clamping members, and may be provided in both.
The hard material constituting the hard contact portion includes a hard synthetic resin material, a metal material, wood, and the like.
The elastic material constituting the elastic clamping portion is a material having rubbery elasticity at around room temperature. For example, olefin elastomer, styrene elastomer, vinyl chloride elastomer, urethane elastomer, natural rubber, NBR , Butadiene, isoprene, pentadiene, hexadiene, heptadiene, chloroprene, and other diene monomer polymers or copolymers thereof, butylene-ethylene-styrene copolymers, ethylene-vinyl acetate copolymers, silicone rubbers such as organopolysiloxanes , Polyurethane, soft polyvinyl chloride, and the like, which can be appropriately deformed and have elasticity to restore the original shape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
An example of the present embodiment will be described as a clamping structure A1 in the writing instrument A in which an object to be clamped is clamped between a shaft cylinder and a clip (see FIG. 1).
[0014]
In the writing instrument A, the first clamping member 10 (shaft tube) and the second clamping member 20 (clip) constitute a clamping structure A1 that can clamp an object to be clamped x (see FIGS. 2 and 3). .
[0015]
The first clamping member 10 is a shaft cylinder for a writing instrument formed by processing a hard synthetic resin material, a hard material such as a metal material, wood or the like into a substantially long and substantially cylindrical shape, and is a preferable example of the present embodiment. According to this, it is formed by injection molding of a hard synthetic resin material.
[0016]
On the outer peripheral surface on the rear end side of the first clamping member 10, an escape recess 11 is formed in a clamping part w <b> 1 (see FIG. 2) that faces an elastic clamping part 21 a (ball part) of the second clamping member 20 described later. ing.
[0017]
In addition, the said clamping site | part is a site | part which has in each of the outer peripheral surface of the 1st clamping member 10, and the back surface of the 2nd clamping member 20, and means the site | part for clamping the to-be-clamped object x, this embodiment According to the form, the clamping part by the side of the 1st clamping member 10 is shown by code | symbol w1, and the clamping part by the side of the 2nd clamping member 20 is shown by code | symbol w2.
More specifically, the clamping part w1 of the first clamping member 10 is a part in the vicinity of the escape concave part 11 including the escape concave part 11, and the clamping part w2 of the second clamping member 20 is an elastic clamping part 21a described later. And it is a site | part which consists of the hard contact part 22 (refer FIG. 2).
[0018]
The relief recess 11 has a substantially concave shape formed so that the elastic clamping portion 21a of the second clamping member 20 does not contact the inner surface thereof. According to an example of the present embodiment, the second clamping member 20 is When viewed from the front side (see FIG. 1 (a)), the circumferential dimension and the axial dimension are respectively hidden so as to be hidden behind the second sandwiching member 20, and the width dimension and the length of the second sandwiching member 20 respectively. It is set smaller than the size.
[0019]
The depth dimension of the relief recess 11 is set so that the distal end surface of the elastic clamping portion 21a of the second clamping member 20 in the closed state does not come into contact.
Therefore, a clearance c is ensured between the distal end surface of the elastic clamping portion 21 a of the second clamping member 20 in the closed state and the bottom surface of the escape recess 11.
[0020]
In addition, although the relief recessed part 11 exhibits the shape which has a bottom face according to a preferable example of this Embodiment, it can also be made into the through-hole shape which penetrates the surrounding wall of the 2nd clamping member 20 to radial direction. In this case, the clearance c may be secured between the member configured in the second clamping member 20 and the elastic clamping portion 21a of the second clamping member 20.
[0021]
And the hard contact part 10a (refer FIG. 2) which contact | abuts the hard contact part 22a of the 2nd clamping member 20 mentioned later on the outer peripheral surface of the 1st clamping member 10 is ensured.
Specifically, the hard contact portion 10a is a portion that is integral with the first sandwiching member 10 made of a hard synthetic resin material, and is a portion that is secured on both sides in the circumferential direction of the escape recess 11.
The hard abutting portion 10 a may be formed by joining a member separate from the first clamping member 10 to the first clamping member 10.
[0022]
Further, a support portion 12 (see FIG. 2) for supporting the second clamping member 20 protrudes from the rear end side outer peripheral surface of the first clamping member 10 in a substantially mountain shape in a side view.
[0023]
Further, reference numeral 13 in FIG. 1 denotes a grip portion made of an elastic material. The grip portion 13 is fitted into the outer peripheral surface of the grip portion on the front end side of the first clamping member 10 so that the writing instrument A is gripped. It will prevent slipping.
Moreover, the code | symbol 30 in FIG. 1 is a substantially hollow cone-shaped front opening | mouth, is screwed by the front end of the 1st clamping member 10, and makes the writing part 41 protrude from the front-end opening part.
[0024]
The writing unit 41 is a ballpoint pen tip according to the illustrated example. The writing unit 41 is in communication with a protruding and retracting mechanism (not shown) in the first clamping member 10, a knock portion 42 protruding from the rear end of the first clamping member 10 (shaft tube), and the like. By knocking operation, it appears and disappears from the front end of the tip 30 (see FIG. 1).
In addition, as other examples of the writing unit 41, a pen tip portion such as a mechanical pencil, a sign pen, or a marking pen may be used.
[0025]
In the second holding member 20, an elastic portion 21 (see FIG. 2) made of an elastic synthetic resin material is integrated with a main body portion 22 formed in a substantially long flat plate shape from a hard synthetic resin material by a molding means such as insert molding. According to an example of the present embodiment, the clip portion of the writing instrument is formed.
[0026]
The main body portion 22 is clamped by the first end portion in the longitudinal direction from the rear end portion so that the front end portion and the end portion side thereof are alternately approached and separated from the first holding member 10 (shaft tube). While being supported by the support portion 12 on the outer peripheral surface of the member 10, it is biased by the leaf spring 43.
[0027]
The plate spring 43 is a substantially U-shaped metal plate in a side view as viewed from the side. One end of the plate spring 43 is fitted to the first holding member 10 and the other end is fitted to the main body 22 of the second holding member 20. In this state, the first clamping member 10 and the second clamping member 20 are biased so as to narrow the front end side.
[0028]
A hard contact portion 22a (see FIG. 2) is integrally formed on the front end side of the main body portion 22.
The hard contact portion 22a is a portion that contacts the hard contact portion 10a of the first clamping member 10 when the space between both the sandwiched portions w1 and w2 is narrowed, and the elastic sandwiching portion 21a is interposed therebetween. There are two places.
Specifically, each of the hard contact portions 22a protrudes from the back surface of the main body portion 22 of the second holding member 20 in the direction of the first holding member 10 in a substantially arc shape in a side view, and the protruding end surface is projected to the first holding member 10. It is made to contact | abut to the hard contact part 10a of an outer peripheral surface.
Note that the hard contact portion 22 a may be formed by joining a member separate from the main body portion 22 to the main body portion 22.
[0029]
The elastic portion 21 is a portion formed of a synthetic resin material having elasticity, such as an elastomer resin, and includes an elastic holding portion 21a (ball portion) protruding from the back side portion of the second holding member 20 and a second holding portion. A through portion 21b that penetrates the member 20 in the thickness direction, an exposed portion 21c that is exposed on the surface side of the second clamping member 20, an elastic knob portion 21d that protrudes from the surface on the rear end side of the second clamping member 20, and an exposure It is integrally formed from the connection part 21e which connects the part 21c and the elastic knob | pick part 21d (refer FIG. 2 and 3).
[0030]
The elastic clamping portion 21a has a substantially hemispherical shape protruding from the back side of the second clamping member 20 into the escape recess 11 of the first clamping member 10, and according to the present embodiment, this substantially hemispherical portion. Is provided in the axial direction of the first clamping member 10 to improve the anti-slip effect when the object x is clamped.
[0031]
The exposed portion 21 c has a desired shape that is exposed on the surface of the second clamping member 20.
According to a preferred example of the present embodiment, the elastic clamping portion 21a and the exposed portion 21c are formed to be larger than the penetrating portion 21b in a direction substantially perpendicular to the penetrating direction of the penetrating portion 21b. Therefore, according to this configuration, the elastic clamping portion 21a is not easily removed in the penetration direction of the penetration portion 21b.
[0032]
The elastic knob portion 21d is a portion formed in a substantially circular shape in a plan view on the surface on the rear end side of the second holding member 20 and a curved surface slightly protruding from the surface.
According to the elastic knob portion 21d, the gap between the elastic knob portion 21d and the rear end portion of the first clamping member 10 is manually pinched so that the clamping portion w1 of the first clamping member 10 and the second clamping member 20 are clamped. When the part w2 is opened, it is possible to prevent the hand to be picked from slipping.
[0033]
Further, the connecting portion 21e connects the exposed portion 21c and the elastic portion 21d on the surface side of the second holding member 20, so that the elastic holding portion 21a, the penetrating portion 21b, the exposed portion 21c, and the elastic knob are connected. The productivity of the second clamping member 20 is improved by integrating the part 21d and the like.
[0034]
Thus, according to the writing instrument A provided with the clamping structure A1, the object to be clamped is between the clamping part w1 of the first clamping member 10 (shaft cylinder) and the clamping part w2 of the second clamping member 20 (clip). When x is sandwiched, the sandwiched object x can be sandwiched without slipping due to the elasticity of the elastic sandwiching portion 21a.
This writing state will be described in more detail. The writing instrument A includes the object x to be clamped, the outer peripheral surface (hard contact portion 10a) of the first holding member 10, and the hard contact portion 22a of the second holding member 20. Further, the sandwiched object x is also sandwiched between the edge of the relief recess 11 of the first sandwiching member 10 and the elastic sandwiching portion 21 a of the second sandwiching member 20. At this time, the elastic clamping part 21a elastically contacts the surface of the object to be clamped x (see FIG. 3).
When applied to the writing instrument A as in the sandwiching structure A1 in the present embodiment, the sandwiched object x is often a flexible member such as a clothing pocket or paper. In this case, since the sandwiched object x is pressed by the elastic sandwiching portion 21a and bent into the escape recess 11 in a concave shape, it opposes the pulling force forward of the writing instrument A.
Therefore, the sandwiched object x does not easily come off.
[0035]
In addition, in a state where the object to be sandwiched x is not sandwiched, the elastic contact portion 22a of the first sandwiching member 10 is brought into contact with the outer peripheral surface (hard contact portion 10a) of the second sandwiching member 20. An appropriate clearance c (see FIG. 1B) is ensured between 21a and the bottom surface of the escape recess 11.
Therefore, the first clamping member 10 and the second clamping member 20 are not bonded due to factors such as component shift of the elastic clamping part 21a.
[0036]
Next, another example of the clamping structure according to the present invention will be described. In addition, in the clamping structure illustrated below, about the site | part which acts substantially the same as said clamping structure A1, the detailed description which overlaps is abbreviate | omitted by attaching | subjecting the same code | symbol as said clamping structure A1.
[0037]
According to the clamping structure A1, the protruding end of the elastic clamping portion 21a is protruded toward the first clamping member 10 rather than the hard abutting portion 22a of the second clamping member 20, and the protruding elastic clamping portion 21a is released. Although the preferable example which was made to escape in the recessed part 11 was shown, like the clamping structure A2 illustrated in FIG. 4, the hard contact part 22a of the 2nd clamping member 20 is 1st rather than the protrusion of the elastic clamping part 21a. It is also possible to adopt a configuration in which the relief recess 11 is omitted while projecting toward the one clamping member 10.
[0038]
According to the sandwiching structure A2, the object to be sandwiched x is sandwiched between the outer peripheral surface (hard contact portion 10a) of the first sandwiching member 10 and the hard contact portion 22a of the second sandwiching member 20.
In addition, the object to be sandwiched x is slightly bent depending on the material or the like, and is thus prevented from slipping by being brought into contact with the elastic sandwiching part 21a.
As in the present embodiment, in the holding structure A2 applied to the writing instrument A, the object x is often a flexible member such as a pocket of clothes or paper. Therefore, the object to be clamped x bends as described above, thereby being brought into contact with the elastic clamping part 21a and being prevented from slipping.
Further, in a state where the object x is not sandwiched (not shown), the hard contact portion 22a of the first sandwiching member 10 contacts the outer peripheral surface (hard contact portion 10a) of the second sandwiching member 20. Thus, an appropriate clearance c is ensured between the elastic clamping portion 21a and the outer peripheral surface of the second clamping member 20. Therefore, the first clamping member 10 and the second clamping member 20 are not bonded to each other.
[0039]
Moreover, the aspect of the hard contact part 22a of the 2nd clamping member 20 is not limited to the said clamping structure A1 and the said clamping structure A2, For example, clamping structure A3 shown in FIG.5 and 6 and clamping structure A4 It may be an aspect such as.
[0040]
The clamping structure A3 is an aspect in which two hard contact portions 22a and 22a are provided on the front side and the rear side of the elastic clamping portion 21a. In addition, in this clamping structure A3, it can also be set as the structure which excluded one hard contact part 22a.
Further, the sandwiching structure A4 is a mode in which the hard contact portion 22a is disposed near the support portion 12.
[0041]
Further, according to the sandwiching structure A1, the escape recess 11 is formed by recessing the outer peripheral surface of the first sandwiching member 10 (shaft tube). However, as in the sandwiching structure A5 shown in FIG. It is also possible to form a plurality of convex portions 11 a on the outer peripheral surface 10 and to form the concave portions 11 by escaping between the convex portions 11 a.
[0042]
Further, according to the clamping structure A1, the elastic clamping portion 21a is provided on the second clamping member 20 (clip) side. However, as illustrated in the clamping structure A6 in FIG. It is also possible to adopt a configuration in which an elastic clamping portion 21a is provided on the cylinder) side.
In this clamping structure A6, an elastic clamping part 21a made of an elastic material is provided at the clamping part w1 of the first clamping member 10, and a clearance c is secured between the elastic clamping part 21a and the inner surface of the second clamping member 20. Yes. In addition, this elastic clamping part 21a may be provided partially with respect to the circumferential direction of the 1st clamping member 10, and may be provided entirely.
Hard contact portions 22a and 22a are provided on the front side and the rear side of the elastic clamping portion 21a on the first clamping member 10 side in substantially the same manner as the clamping structure A3 (see FIG. 5).
[0043]
In addition, according to the clamping structures A1 to A6, the elastic clamping part 21a is provided on either the first clamping member 10 (shaft cylinder) side or the second clamping member 20 (clip) side. Both the first clamping member 10 and the second clamping member 20 may have a configuration in which an elastic clamping portion 21a is provided (not shown).
[0044]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
According to the present invention, when the two clamping members are urged so as to be narrowed, both the hard abutting parts abut against each other, so that the elastic clamping part and the opposing clamping member are not in contact with each other. . Therefore, it is possible to exhibit the anti-slip action by the elastic clamping part and to prevent the elastic clamping part from being bonded to the opposing clamping member.
[0045]
Furthermore , since the hard contact portion is arranged at the sandwiched portion, the object to be sandwiched is more securely sandwiched between the elastic sandwiching portion and the sandwiching member opposed to each other or between both hard contact portions. be able to. Moreover, even when the thickness of the object to be sandwiched is thinner than between the elastic sandwiching part and the sandwiching member facing the object, the object to be sandwiched can be sandwiched between the two hard contact parts.
[0046]
Furthermore , since the elastic clamping part protrudes to the clamping member side which opposes rather than a hard contact part, the anti-slip | slipping action by an elastic clamping part can be exhibited effectively, and a to-be-clamped object can be clamped still more reliably. .
[0047]
Furthermore , the elastic clamping portion can be prevented from being easily removed, and the elastic clamping portion can be easily formed by a molding means such as insert molding.
[0048]
Furthermore , by pinching the elastic knob portion and the shaft tube with hands, the space between the clip portion and the shaft tube is opened. At that time, it is possible to prevent the hand to be picked from slipping due to the elasticity of the elastic knob.
[0049]
Furthermore , since the elastic clamping part, the elastic knob | pick part, and the connection part are integrally molded, it is excellent in the productivity of the writing instrument provided with the said clamping structure.
[Brief description of the drawings]
FIG. 1 is an example of a writing instrument to which a clamping structure according to the present invention is applied, wherein (a) shows a front view and (b) shows a side view.
FIG. 2 is an enlarged side view of an essential part showing the clamping structure in a cutaway state, showing a state in which a gap between the clamping members is opened.
FIG. 3 is an enlarged side view of the main part showing the clamping structure in a cutaway state, showing a state in which a gap between the clamping members is closed.
FIG. 4 is an enlarged side view of an essential part, showing another example of the clamping structure according to the present invention.
FIG. 5 is an enlarged side view of the main part, showing another example of the holding structure according to the present invention cut away.
FIG. 6 is an enlarged side view of a main part, showing another example of the clamping structure according to the present invention.
FIG. 7 is an enlarged side view of an essential part, showing another example of the sandwiching structure according to the present invention.
FIG. 8 is an enlarged side view of the main part, showing another example of the holding structure according to the present invention.
[Explanation of symbols]
10: First clamping member (shaft tube)
10a: Hard contact portion 11: Relief recess 20: Second clamping member (clip)
22a: Hard contact part 21a: Elastic clamping part 21b: Penetration part 21c: Exposed part 21d: Elastic knob part 21e: Connecting part A: Writing instruments A1, A2, A3, A4, A5, A6: Clamping structure c: Clearance w1: Clamping site w2: Clamping site x: Object to be clamped

Claims (1)

A sandwiching structure in which the sandwiched object is sandwiched between the sandwiching part of one sandwiching member and the sandwiching part of the other sandwiching member by urging the two sandwiching members so that the space between them is narrowed. In
Both of the two clamping members are provided with a hard contact portion made of a hard material so as to contact each other when the space between the both sandwiched portions is narrowed,
At least one of the two holding members is elastic made of an elastic material so that it does not come into contact with the holding member that is disposed at the holding portion and faces when the holding portion is narrowed. A clamping part is provided ,
One of the clamping members is a shaft tube of a writing instrument, and the other clamping member is a clip portion of the writing instrument,
The clip portion supports the portion between the front end portion and the rear end portion on the shaft tube so that the front end portion and the rear end portion are alternately approached and separated from the shaft tube. The clip part has the above-mentioned clamping part on the front end side thereof, and has an elastic knob part made of an elastic material on the outer surface on the rear end side thereof,
A holding structure characterized in that the elastic pinching portion and the elastic knob portion are integrally connected by a connecting portion, and the elastic pinching portion, the elastic knob portion, and the connecting portion are integrally formed .

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