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JP4026097B2 - Lead feeding mechanism in mechanical pencil - Google Patents
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JP4026097B2 - Lead feeding mechanism in mechanical pencil - Google Patents

Lead feeding mechanism in mechanical pencil Download PDF

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Publication number
JP4026097B2
JP4026097B2 JP13098598A JP13098598A JP4026097B2 JP 4026097 B2 JP4026097 B2 JP 4026097B2 JP 13098598 A JP13098598 A JP 13098598A JP 13098598 A JP13098598 A JP 13098598A JP 4026097 B2 JP4026097 B2 JP 4026097B2
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Japan
Prior art keywords
tip
chuck
lead
mechanical pencil
ring
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JP13098598A
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JPH11309983A (en
Inventor
涼治 松丸
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Tombow Pencil Co Ltd
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Tombow Pencil Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、シャープペンシルにおける芯送出機構に関する。
【0002】
【従来の技術】
従来、シャープペンシルにおいて使用される芯送出機構は、内部に収容する芯をシャープペンシルの先端に突出させると共に、その先端において芯折れ又は芯づまりを防止し、確実に保持することができるように、シャープペンシルを構成する軸筒内部に軸筒後方より突出するノック部を打突することで前進して拡開する一方で、スプリングの弾性により再び後退し、軸筒開口部において先端チャック用リングにより緊締してなる先端チャックを使用し、軸筒内部の芯収容部内に収容される芯を前進させつつ把持するいわゆるダブルチャック機構をもつものがある(実開平7−15383号、特開平7−228088号公報等参照)。
【0003】
【発明が解決しようとする課題】
しかしながら、上記従来のもののように、シャープペンシルを構成する軸筒内部に軸筒後方より突出するノック部を打突することで前進して拡開する一方で、スプリングの弾性により再び後退し、軸筒開口部において先端チャック用リングにより緊締してなる先端チャックを使用する上記ダブルチャック機構をもつものの場合には、確かに芯の送出及び把持を繰出チャック及び先端チャックの二つにより行うことで、芯はこれらのチャックにより確実に把持されるものとなって、筆記時などに芯の先端に大きな圧力が加わっても大きく撓んで揺動して、正確な筆記が行えなかったり、芯が折れてしまう等の不具合が防止できる上、シャープペンシルの先端の先端チャックにおいても繰出チャックから送出されてきた芯を把持するものであるので、ある程度短くなった芯が自然に落下し、また廃棄せざるを得なくなるという大きな無駄は防げるものとなるが、シャープペンシルの先端に配置される先端チャックの拡開、緊締を行うこととなる軸筒開口部が軸筒に対して一体に構成されているから、一つの筆記具内に例えばボールペン及びシャープペンシル等の複数の筆記手段を内装する筆記具では、使用することができないという問題点がある。
【0004】
そこで、この発明は上記従来のものの持つ問題点を改善するものであり、芯を確実に把持することにより正確な筆記や芯の折損を防止しつつ、芯の無駄を防止すると共に、この芯送出機構を具えるシャープペンシルを様々な筆記具と組合せて適用することができるようにするものである。
【0005】
【課題を解決するための手段】
軸筒内に収容される送出部と軸筒内外に出没自在とする先端部とから構成され、
該送出部は、ゴムチップを内装する先金具と、先端側を該先金具と一体に取り付け、後端縁において芯収容部との間でスプリングを介在させてなる継手と、該先金具内周面の段部と該継手の先端縁との間でスライド往復するように内装される締めリングと、芯収容部のチャック継と一体に結合し、該締めリング内でのスライドにより該締めリングに当接して緊締し、又、離脱して拡開する芯チャックとからなり、
該先端部は、軸筒開口部に内方より当接する先端チャック用リングと、該先端チャック用リング内でのスライドにより該先端チャック用リングに当接して緊締し、又、離脱して拡開する先端チャックとからなり、
先金具と先端チャック用リングとの間にスプリングを介在させるとともに、先金具先端と先端チャック後端とを一体に結合させてなるものである。
【0006】
【発明の実施の形態】
この発明の実施に当たり、シャープペンシル部分後端のノック部への打突を行うことで、この送出部より先端部方向に送出される芯は、先端部の先端チャックにより軸筒外へ向かって突出するように前進されつつ把持され、この送出部及び先端部の両チャックにより把持されることとなる芯は、大きく撓んで揺動するこもなく正確な筆記が行えると共に、芯の折損をも防止できる上、先端部の先端チャックにより芯は常に把持されるものであるから、芯の全長が短くなっても無駄なく確実に筆記が行えるものである。
【0007】
また、軸筒先端に突出する芯を把持することとなる先端部を構成する先端チャックと、この先端チャックと一体になって、その緊締、拡開を制御する先端チャック用リングとは、軸筒と独立して一体的に出没することができるから、複数の筆記手段、例えばシャープペンシルの他にボールペンを内装する筆記具においては、上記シャープペンシルに代えて、このシャープペンシルを内部に収容して使用することができる
【0008】
【実施例】
この発明を図に示す実施例により更に説明する。(1)はこの発明の芯送出機構をもつシャープペンシルを具える筆記具であり、この筆記具(1)は、軸筒(2)と、この軸筒(2)内に出没自在に収容され、軸筒(2)の後端部より突出してなるノック部(3)への打突により、軸筒(2)の先端より出没してなるシャープペンシル(5)と押出釦のスライドによりシャープペンシル(5)と交替して出没するボールペン(4)から構成されるものである。
【0009】
そして、この軸筒(2)内にボールペン(4)と共に収容されることとなるシャープペンシル(5)における芯送出機構(6)は、軸筒(2)内に収容され、軸筒(2)の後端部より突出するノック部(3)への打突により先端部(7)へ芯(8)を送出する送出部(11)と、その先端を軸筒(2)内外に出没自在とする先端部(7)とから構成される。上記送出部(11)は、従来構造のようにゴムチップ(19)を内装する先金具(18)と、先端側を該先金具(18)と一体に取り付け、後端縁において芯収容部(16)との間でスプリング(21)を介在させてなる継手(12)と、その内部において該先金具(18)内周面の段部(22)と該継手(12)の先端縁との間でスライド往復するように内装される締めリング(13)と、芯収容部(16)のチャック継(15)と一体に結合し、該締めリング(13)内でのスライドにより該締めリング(13)に当接して緊締し、又離脱して拡開する芯チャック(14)からなり、一方先端部(7)は、軸筒開口部(20)に内方より当接する先端チャック用リング(9)と、その内をスライドし、この先端チャック用リング(9)と軸筒開口部(20)の当接により、先端チャック用リング(9)に当接して緊締し、又、離脱して拡開する先端チャック(10)とからなる(図2参照)。
【0010】
また、上述したようにシャープペンシル(5)を構成する送出部(11)と先端部(7)とは、スプリング(17)芯チャックを往復動するスプリング(22)より若干弾性を弱くしてある。を送出部(11)と先端部(7)との間に介在させて一体とし、軸筒(2)の後端部に突出するノック部(3)への打突により、芯チャック(14)に挟持されて前方に向かって送出される芯(8)を、先金具(18)内に内装されるゴムチップ(19)により先端部(7)内に案内すると共に、この先端部(7)内に案内される芯(8)を、先端部(7)を先端チャック用リング(9)と共に構成する先端チャック(10)により軸筒(2)の軸筒開口部(20)より軸筒(2)内外に出没させてなるものである。
【0011】
この発明の実施例である筆記具(1)は以上の構成を具えるものであるので、筆記具(1)を構成する軸筒(2)内に収容されるシャープペンシル(5)によって筆記を行うため、軸筒(2)の後端部より突出するノック部(3)を打突することでシャープペンシル(5)を軸筒(2)外に突出させると共に保持する。このときシャープペンシル(5)における芯送出機構(6)を構成する先端部(7)の先端チャック用リング(9)は、その内部をスライドして緊締、拡開する先端チャック(10)と共に軸筒開口部(20)より突出して保持される。
【0012】
そして、このように軸筒(2)内に収容されるシャープペンシル(5)の芯送出機構(6)を構成する先端部(7)の先端チャック用リング(9)及び、その内部をスライドして緊締、拡開する先端チャック(10)が軸筒(2)の先端の軸筒開口部(20)より突出して保持された状態で、更に軸筒(2)の後端部より突出するノック部(3)への打突を加えることにより、従来構造と同様に、筆記具(1)のシャープペンシル(5)の芯送出機構(6)を構成する送出部(11)の芯チャック(14)が、継手(12)と芯収容部(16)との間に介在するスプリング(21)によって締めリング(13)内をスライドして、芯(8)を収容してなる芯収容部(16)より、同様に芯送出機構(6)を構成することとなる先端部(7)方向に芯(8)を前進させつつ把持する。一方、この送出部(11)より先端部(7)方向に送出される芯(8)は、先端チャック用リング(9)の前進が阻止され、先端チャック(10)の挟持が緩められて、軸筒(2)外へ向かって突出するように前進し、ついでスプリング(17)により軸筒(2)に引き込まれて先端チャック用リング(9)により緊締した先端チャック(10)によって把持されるものとなる。その結果、この送出部(11)及び先端部(7)の両チャック(14)(10)により把持されることとなる芯(8)は、筆記時において大きな筆圧が加えられても大きく撓んで揺動することもなく正確な筆記が行えるようになると共に、過大な負荷による芯(8)の折損をも防止できる上、筆記具(1)の軸筒(2)の軸筒開口部(20)より突出する先端部(7)の先端チャック(10)により芯(8)は常に把持されるものであるから、芯(8)の全長が短くなっても無駄なく確実に筆記を行えるものである。
【0013】
また、この筆記具においてシャープペンシル(5)は、このシャープペンシル(5)の芯送出機構(6)を構成し、軸筒(2)先端に突出する芯(8)を把持することとなる先端部(7)を構成する先端チャック(10)と、この先端チャック(10)と一体になって、その緊締、拡開を制御する先端チャック用リング(9)とは、軸筒(2)内外に出没するにあたっては、上記軸筒(2)と何等構造上の関連がなく軸筒開口部(20)より出没するようになっているから、この発明の実施例である筆記具(1)ように複数の筆記手段、例えばシャープペンシル(5)の他にボールペン(4)を内装する筆記具(1)に容易に使用することができるようになるものである。
【0014】
【発明の効果】
以上のとおり、この発明は構成されるのでこの芯に対して大きな筆圧が加わっても大きく撓むことで揺動して、正確な筆記が行えなくなってしまうことや折損してしまうことを防止し、芯は先端部の先端チャックによる常に把持されるものであるので無駄なく正確に芯を使用することができると共に、シャープペンシルの芯送出機構は、その先端部ごと軸筒内外を出没するので、筆記具の中に複数の筆記手段、即ちシャープペンシルの他にボールペン等を収容する場合にも適用することが可能となる優れた効果を有するものである。
【図面の簡単な説明】
【図1】 この発明の実施例である筆記具の部分断面図である。
【図2】 その要部拡大断面図である。
【符号の説明】
1 筆記具
2 軸筒
3 ノック部
4 ボールペン
5 シャープペンシル
6 芯送出機構
7 先端部
8 芯
9 先端チャック用リング
10 先端チャック
11 送出部
12 継手
13 締めリング
14 芯チャック
15 チャック継
16 芯収容部
17 スプリング
18 先金具
19 ゴムチップ
20 軸筒開口部
21 スプリング
22 段部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lead feeding mechanism in a mechanical pencil.
[0002]
[Prior art]
Conventionally, the lead feeding mechanism used in mechanical pencils has a lead that protrudes from the tip of the mechanical pencil to the tip of the mechanical pencil, and prevents tip breakage or lead jamming at the tip so that it can be held securely. The knock part that protrudes from the rear of the shaft cylinder hits the inside of the cylinder that constitutes the pencil and moves forward and expands, but retracts again due to the elasticity of the spring, and is tightened by the tip chuck ring at the shaft cylinder opening. There are those having a so-called double chuck mechanism that uses a tip chuck formed as described above and grips the lead accommodated in the lead accommodating portion inside the shaft cylinder while moving forward (Japanese Utility Model Laid-Open No. 7-15383, Japanese Patent Laid-Open No. 7-228088). (See publications).
[0003]
[Problems to be solved by the invention]
However, like the above-described conventional one, the knock portion protruding from the rear of the shaft cylinder is advanced and expanded by striking the inside of the shaft cylinder constituting the mechanical pencil, while it is retracted again by the elasticity of the spring. In the case of the above-mentioned double chuck mechanism that uses the tip chuck that is tightened by the tip chuck ring at the tube opening, surely feeding and gripping the lead by two of the feeding chuck and the tip chuck, The lead is securely gripped by these chucks, and even if a large pressure is applied to the tip of the lead during writing, the lead will bend and swing greatly, preventing accurate writing or the lead from breaking. In addition to preventing inconveniences such as the tip of the mechanical pencil, the tip chuck at the tip of the mechanical pencil grips the lead fed from the feeding chuck. A shaft that will cause the tip chuck placed at the tip of the mechanical pencil to be expanded and tightened, although it can prevent the waste of the core that has been shortened to some extent from falling naturally and being forced to dispose of it. Since the cylinder opening is integrally formed with the shaft cylinder, there is a problem that it cannot be used in a writing instrument in which a plurality of writing means such as a ballpoint pen and a mechanical pencil are provided in one writing instrument.
[0004]
Therefore, the present invention improves the above-described problems of the conventional ones, and by reliably grasping the lead, while preventing accurate writing and breakage of the lead, preventing waste of the lead, A mechanical pencil having a mechanism can be applied in combination with various writing instruments.
[0005]
[Means for Solving the Problems]
Consists of a delivery part that is housed in the shaft tube and a tip part that can be moved into and out of the shaft tube,
The delivery part includes a metal fitting with a rubber chip, a joint with a tip end attached integrally with the metal fitting, and a spring interposed between the core housing part at the rear edge, and an inner peripheral surface of the metal fitting A fastening ring that is mounted so as to reciprocate between the step portion of the joint and the tip edge of the joint, and a chuck joint of the core housing portion, and is integrally coupled to the fastening ring by sliding in the fastening ring. It consists of a core chuck that touches and tightens, and detaches and expands.
The tip is in contact with the tip chuck ring from the inside of the shaft cylinder opening, and the tip chuck is brought into contact with and tightened by sliding in the tip chuck ring. Consisting of a tip chuck that
A spring is interposed between the tip fitting and the tip chuck ring, and the tip of the tip fitting and the rear end of the tip chuck are integrally coupled.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In carrying out the present invention, by hitting the knock portion at the rear end of the mechanical pencil portion, the lead fed from the sending portion toward the tip portion protrudes toward the outside of the shaft cylinder by the tip chuck at the tip portion. The lead that is gripped while being advanced and can be gripped by both the chucks of the delivery part and the tip part can be accurately written without greatly bending and swinging, and can also prevent breakage of the lead. In addition, since the lead is always gripped by the tip chuck at the tip, writing can be performed reliably without waste even if the overall length of the lead is shortened.
[0007]
Further, a tip chuck that forms a tip portion that grips a core protruding from the tip of the shaft cylinder, and a tip chuck ring that is integrated with the tip chuck and controls tightening and spreading are: In addition to multiple mechanical means such as a mechanical pencil, a writing instrument with a ballpoint pen is used instead of the mechanical pencil. it can be.
[0008]
【Example】
The present invention will be further described with reference to the embodiments shown in the drawings. (1) is a writing instrument including a mechanical pencil having a lead feeding mechanism according to the present invention, and the writing instrument (1) is accommodated in the axial cylinder (2) and is freely accommodated in the axial cylinder (2). The mechanical pencil (5) that protrudes and protrudes from the tip of the shaft cylinder (2) by the impact on the knock part (3) protruding from the rear end of the cylinder (2) and the mechanical pencil (5 ) And a ballpoint pen (4) that appears and disappears.
[0009]
The lead feeding mechanism (6) in the mechanical pencil (5) to be housed together with the ballpoint pen (4) in the shaft tube (2) is housed in the shaft tube (2), and the shaft tube (2). A feeding part (11) for sending the core (8) to the tip part (7) by hitting the knock part (3) projecting from the rear end part , and its tip can be moved into and out of the shaft tube (2). Ru is constructed from the tip portion (7) to. The delivery part (11) has a front metal fitting (18) in which a rubber chip (19) is internally provided as in the conventional structure, and a front end is integrally attached to the front metal fitting (18), and a core housing part (16 at the rear edge). Between the step (22) of the inner peripheral surface of the tip fitting (18) and the tip edge of the joint (12). The fastening ring (13), which is mounted so as to slide back and forth, and the chuck joint (15) of the core housing portion (16) are integrally coupled, and the fastening ring (13) is slid by sliding in the fastening ring (13). The tip chuck (14) is tightened by contacting and tightening, and is disengaged and expanded. The tip (7) has a tip chuck ring (9) that contacts the shaft tube opening (20) from the inside. ), And slide in the tip chuck ring (9) By the abutment of the cylindrical opening (20), abuts tightened to the tip chuck ring (9), also composed of a front end chuck expanding disengaged (10) (see FIG. 2).
[0010]
Further, as described above, the delivery part (11) and the tip part (7) constituting the mechanical pencil (5) have a slightly weaker elasticity than the spring (17) [ the spring (22) reciprocating the core chuck]. is there. ] Is interposed between the delivery part (11) and the tip part (7) so as to be integrated, and the core chuck (14) is brought into contact with the knock part (3) projecting from the rear end part of the shaft tube (2). ) And the lead (8) fed forward is guided into the tip (7) by a rubber chip (19) housed in the tip (18), and the tip (7). the core (8) which is guided within the shaft tube opening of the barrel (2) by the leading end chuck (10) constituting the tip portion (7) with the leading end chuck ring (9) (20) from the barrel ( 2) It is made to appear inside and outside.
[0011]
Since the writing instrument (1) which is an embodiment of the present invention has the above configuration, writing is performed by the mechanical pencil (5) accommodated in the shaft cylinder (2) constituting the writing instrument (1). The mechanical pencil (5) is protruded out of the axial cylinder (2) and held by hitting a knock part (3) protruding from the rear end of the axial cylinder (2). At this time, the tip chuck ring (9) of the tip (7) constituting the lead feeding mechanism (6) in the mechanical pencil (5) is slid and tightened to expand and expand the tip chuck (10). It protrudes and is hold | maintained from a cylinder opening part (20).
[0012]
Then, the tip chuck ring (9) of the tip portion (7) constituting the lead feeding mechanism (6) of the mechanical pencil (5) accommodated in the shaft cylinder (2) and the inside thereof are slid. A knock that protrudes further from the rear end portion of the shaft tube (2) in a state where the tip chuck (10) that is tightened and expanded further projects from the shaft tube opening (20) at the tip of the shaft tube (2). parts by adding the droplet impact to (3), similarly to the conventional structure, the writing instrument delivery portion constituting the core delivery mechanism (6) of the pencil (5) (1) (11) the core chuck (14) However, the lead accommodating part (16 ) which accommodates the lead (8) by sliding in the fastening ring (13) by the spring (21) interposed between the joint (12) and the lead accommodating part (16). In the same way, the tip (7) direction that will constitute the lead feeding mechanism (6) To grip while advancing the core (8). On the other hand , the lead (8) sent from the delivery part (11) toward the tip (7) is prevented from advancing the tip chuck ring (9), and the tip chuck (10) is loosened. barrel (2) advances so as to protrude toward the outside, then Ru is gripped by the spring barrel by (17) the tip chuck tightened by drawn by the tip chuck ring (2) (9) (10) It will be a thing . As a result, the core (8) to be gripped by both the chucks (14) and (10) of the delivery part (11) and the tip part (7) is greatly bent even when a large writing pressure is applied during writing. In addition to being able to perform accurate writing without swinging, the core (8) can be prevented from being broken by an excessive load, and the shaft tube opening (20) of the shaft tube (2) of the writing tool (1) can be prevented. ) Since the lead (8) is always gripped by the tip chuck (10) of the tip (7) that protrudes further, even if the overall length of the lead (8) is shortened, writing can be performed reliably and without waste. is there.
[0013]
Further, in this writing instrument, the mechanical pencil (5) constitutes the lead feeding mechanism (6) of the mechanical pencil (5), and the tip end portion that grips the lead (8) protruding from the tip of the shaft cylinder (2). The tip chuck (10) that constitutes (7) and the tip chuck ring (9) that is integrated with the tip chuck (10) and controls the tightening and spreading of the tip chuck (10) are arranged inside and outside the shaft tube (2). When appearing and appearing, there is no structural relation with the shaft cylinder (2) and it is designed to appear and disappear from the shaft cylinder opening (20). Therefore, a plurality of writing tools (1) as an embodiment of the present invention are used. In addition to the writing means, for example, the mechanical pencil (5), the writing instrument (1) having a ballpoint pen (4) can be easily used.
[0014]
【The invention's effect】
As described above, since the present invention is constructed, even if a large writing pressure is applied to the core, it is rocked by being greatly bent, and it is prevented that accurate writing cannot be performed or broken. However, since the lead is always gripped by the tip chuck at the tip, the lead can be used accurately and without waste, and the lead feeding mechanism of the mechanical pencil moves in and out of the shaft cylinder with the tip. The writing instrument has an excellent effect that can be applied to a case where a ballpoint pen or the like is accommodated in addition to a plurality of writing means, that is, a mechanical pencil.
[Brief description of the drawings]
FIG. 1 is a partial sectional view of a writing instrument according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Shaft cylinder 3 Knock part 4 Ball-point pen 5 Mechanical pencil 6 Core feed mechanism 7 Tip part 8 core 9 Tip chuck ring 10 Tip chuck 11 Sending part 12 Joint 13 Fastening ring 14 Core chuck 15 Chuck joint 16 Core accommodating part 17 Spring 18 Tip metal fitting 19 Rubber tip 20 Shaft tube opening
21 Spring
22 steps

Claims (1)

軸筒内に収容される送出部と軸筒内外に出没自在とする先端部とから構成され、Consists of a delivery part that is housed in the shaft tube and a tip part that can be moved into and out of the shaft tube,
該送出部は、ゴムチップを内装する先金具と、先端側を該先金具と一体に取り付け、後端縁において芯収容部との間でスプリングを介在させてなる継手と、該先金具内周面の段部と該継手の先端縁との間でスライド往復するように内装される締めリングと、芯収容部のチャック継と一体に結合し、該締めリング内でのスライドにより該締めリングに当接して緊締し、又、離脱して拡開する芯チャックとからなり、  The delivery part includes a metal fitting with a rubber chip, a joint with a tip end attached integrally with the metal fitting, and a spring interposed between the core housing part at the rear edge, and an inner peripheral surface of the metal fitting A fastening ring that is mounted so as to reciprocate between the step portion of the joint and the tip edge of the joint, and a chuck joint of the core housing portion, and is integrally coupled to the fastening ring by sliding in the fastening ring. It consists of a core chuck that touches and tightens, and detaches and expands.
該先端部は、軸筒開口部に内方より当接する先端チャック用リングと、該先端チャック用リング内でのスライドにより該先端チャック用リングに当接して緊締し、又、離脱して拡開する先端チャックとからなり、  The tip is in contact with the tip chuck ring from the inside of the shaft cylinder opening, and the tip chuck is brought into contact with and tightened by sliding in the tip chuck ring. Consisting of a tip chuck that
先金具と先端チャック用リングとの間にスプリングを介在させるとともに、先金具先端と先端チャック後端とを一体に結合させてなるシャープペンシルにおける芯送出機構。  A lead feeding mechanism in a mechanical pencil, in which a spring is interposed between the tip metal fitting and the tip chuck ring, and the tip of the metal tip and the rear end of the tip chuck are integrally coupled.
JP13098598A 1998-04-27 1998-04-27 Lead feeding mechanism in mechanical pencil Expired - Fee Related JP4026097B2 (en)

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Application Number Priority Date Filing Date Title
JP13098598A JP4026097B2 (en) 1998-04-27 1998-04-27 Lead feeding mechanism in mechanical pencil

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001270283A (en) * 2000-01-20 2001-10-02 Kotobuki:Kk Double chuck mechanical pencil and its internal writing mechanism
WO2004028518A1 (en) 2002-09-26 2004-04-08 Japan Science And Technology Agency Therapeutic causing contraction of mucosal tissue, method of treating diseases relating to mucosal tissues, injector and therapeutic set
JP2013018175A (en) * 2011-07-11 2013-01-31 Mitsubishi Pencil Co Ltd Multiple writing instrument

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