JPH11201207A - Coil spring - Google Patents
Coil springInfo
- Publication number
- JPH11201207A JPH11201207A JP2257698A JP2257698A JPH11201207A JP H11201207 A JPH11201207 A JP H11201207A JP 2257698 A JP2257698 A JP 2257698A JP 2257698 A JP2257698 A JP 2257698A JP H11201207 A JPH11201207 A JP H11201207A
- Authority
- JP
- Japan
- Prior art keywords
- locking claw
- locking
- steel plate
- mainspring
- spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 108
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- 238000005452 bending Methods 0.000 claims abstract description 24
- 238000004804 winding Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000009661 fatigue test Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/48—Automatic re-storing devices
- B65H75/486—Arrangements or adaptations of the spring motor
Landscapes
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
- Springs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、コードリール等
の装置に使用されるゼンマイバネの改良に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a mainspring used for a device such as a cord reel.
【０００２】[0002]
【従来の技術】従来から、弾性を有する長尺状の鋼板
を、先端側から順次後端側にかけて巻回成形し、鋼板の
前端側を最径内側に、後端側を最径外側に夫々配した渦
巻き状を呈するゼンマイバネは広く知られており、例え
ば電気コードの引き出し巻き込みを行うコードリールに
使用されている。コードリールに使用される場合、ゼン
マイバネを所定径の渦巻き状にした状態で、図１０、図
１１に示すようにコードリールのケースｋのバネ収納部
ｋ１内に収納されるが、その際、ゼンマイバネの巻き弾
性作用により拡張しようとするため、収納作業が困難で
ある。そのため、従来、ゼンマイバネをケースのバネ収
納部の径よりやや小さい径に係止させておく手段が採ら
れている。この従来における係止手段は、図９(B) に示
すように、ゼンマイバネｄの後端側に、ゼンマイバネｄ
を構成した鋼板を所定の長さ及び幅で穿設した係止用孔
ａを設けるとともに、その係止用孔ａの後方位置に、鋼
板の一部を径外方向に切り起こした係止爪ｂを設け、図
９(A) に示すように渦巻き状を呈する状態から巻き弾性
により拡張させれば、その渦巻き状を呈する状態で係止
爪ｂが係止用孔ａに自然に入り込んで係止させることが
でき、このようにして、ゼンマイバネｄをケースｋのバ
ネ収納部ｋ１の径よりやや小さい径に係止させておくよ
うにしたものである。そして、図９に示すように、係止
爪ｂと係止用孔ａとを係止させた状態から、ケースｋに
設けた固定軸ｋ３に、ゼンマイバネｄの先端ｅを取付け
るとともに、ゼンマイバネの後端ｆを、ケースｋ内に回
転自在に設けた回転胴ｋ４に係止するようにしてセット
し、その後、回転胴ｋ４を、ゼンマイバネｄを巻き締め
る方向（図示のＸ方向）に２〜３回転させて、所謂ゼン
マイバネの予巻き行う。この予巻きにより、ゼンマイバ
ネが巻き締められて係止爪ｂが係止用孔ａから外れ、そ
して、この予巻きした状態を、コードｋ２をケースｋ内
に完全に巻き込み終えた状態とする。これにより、巻き
込んだコードｋ２をケースｋ２外に引き出せばそれに伴
ってゼンマイバネｄが巻き締められて巻き弾性を増し、
コードｋ２を離せばゼンマイバネの巻き弾性によってコ
ードｋ２が巻き込まれ、上記のゼンマイバネｄの予巻き
状態で引き出したコードｋ２を巻き込み終えることがで
きる。尚、コードリールについては更に後述する。しか
しながら、長さの長いコードｋ２に使用する場合には、
ゼンマイバネｄも長さの長いものを使用して巻き回数を
多くしたものが必要となるが、ゼンマイバネｄの巻き回
数が多くなると、ゼンマイバネの予巻きを行ってもゼン
マイバネの径外側の部分は巻き締められず、その結果、
係止爪ｂが係止用孔ａから外れずに、コードｋ２を所定
長さだけ引き出した状態で係止爪ｂが係止用孔ａから外
れる。従って、このような場合は、コードｋ２の引き出
し巻き込みに伴って、係止爪ｂが係止用孔ａから出たり
入ったりし、使用に際して係止爪ｂが係止用孔ａに入り
込む際の衝撃力を繰り返して受ける。その結果、使用中
に係止爪ｂが折損してしまったり、或いは、図９(B) に
示すように係止爪ｂの基端部から亀裂ｇが発生して複数
回の使用によって鋼板が係止爪ｂを設けた部分から破断
してしまうという課題がある。2. Description of the Related Art Conventionally, a long steel plate having elasticity has been formed by winding from the front end side to the rear end side, and the front end side of the steel sheet is located at the innermost side and the rear end side is located at the outermost side. The spiral spring having a spiral shape is widely known, and is used, for example, in a cord reel for pulling out and winding an electric cord. When used in a cord reel, the mainspring is wound in a spiral shape having a predetermined diameter and stored in a spring storage portion k1 of a case k of the code reel as shown in FIGS. Because of the winding elasticity of the wire, the storing operation is difficult. For this reason, conventionally, means for retaining the mainspring to a diameter slightly smaller than the diameter of the spring housing portion of the case has been adopted. As shown in FIG. 9 (B), the conventional locking means includes a mainspring spring d at the rear end side of the mainspring spring d.
A locking hole a formed by drilling a steel plate having a predetermined length and width, and a locking claw formed by cutting a part of the steel plate radially outward at a position behind the locking hole a. 9B, the claw b is naturally inserted into the locking hole a in the spiral state when the spiral claw is expanded by winding elasticity from the spiral state as shown in FIG. 9 (A). In this way, the mainspring spring d is locked at a diameter slightly smaller than the diameter of the spring storage portion k1 of the case k. Then, as shown in FIG. 9, from the state in which the locking claw b and the locking hole a are locked, the tip e of the mainspring spring d is attached to the fixed shaft k3 provided in the case k, and The end f is set so as to be engaged with a rotating body k4 rotatably provided in the case k, and thereafter, the rotating body k4 is rotated two to three times in a direction in which the mainspring d is wound (X direction in the drawing). Then, the so-called mainspring is pre-wound. By this pre-winding, the mainspring is tightened to release the locking claw b from the locking hole a, and the pre-wound state is a state in which the cord k2 has been completely wound into the case k. Thereby, if the cord k2 is pulled out of the case k2, the mainspring d is tightened and the winding elasticity is increased.
When the cord k2 is released, the cord k2 is wound by the winding elasticity of the mainspring, and the cord k2 pulled out in the pre-wound state of the mainspring d can be completely wound. The code reel will be further described later. However, when used for a long code k2,
It is necessary to use a longer spring spring d and increase the number of windings using a longer spring. As a result,
The locking claw b does not come off from the locking hole a, and the locking claw b comes off from the locking hole a with the cord k2 pulled out by a predetermined length. Therefore, in such a case, the locking claw b moves in and out of the locking hole a as the cord k2 is pulled out and entangled, and the locking claw b enters the locking hole a in use. Receiving impact force repeatedly. As a result, the locking claw b is broken during use, or a crack g is generated from the base end of the locking claw b as shown in FIG. There is a problem that the portion where the locking claw b is provided is broken.
【０００３】[0003]
【発明が解決しようとする課題】本願発明は、以上の実
情に鑑み提案されたもので、ゼンマイバネの巻き回数が
多い場合でも、使用中に係止爪が折損してしまったり、
或いは、係止爪を設けた部分から破断してしまうことの
ないゼンマイバネの提供を第１の目的とする。SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances. Even when the number of windings of the mainspring is large, the locking claw may break during use.
Alternatively, it is a first object to provide a mainspring that does not break from a portion provided with a locking claw.
【０００４】本願発明は、ゼンマイバネの巻き回数が多
い場合でも、使用中に係止爪が折損してしまったり、或
いは、係止爪を設けた部分から破断してしまうことのな
いものであって、容易に、且つ低コストで製作し得るゼ
ンマイバネの提供を第２の目的とする。According to the present invention, even when the number of turns of the mainspring is large, the locking claw does not break during use or break from the portion provided with the locking claw. A second object is to provide a mainspring that can be manufactured easily and at low cost.
【０００５】[0005]
【課題を解決するための手段】長尺状の鋼板２を、前端
側から順次後端側にかけて巻回成形し、鋼板２の前端側
を最径内側に、後端側を最径外側に夫々配して渦巻き状
としたゼンマイバネにおいて本願発明は、以下の特徴を
有するものを提供することにより、上記課題を解決す
る。本願第１の発明は、ゼンマイバネを構成する鋼板２
の後端側には、係止爪３と、係止用孔４と、弱部９と
が、長手方向に沿って夫々備えられる。係止用孔４は、
係止爪３の後方位置に配位されることにより、渦巻き状
に巻回された状態で、係止爪３と係止用孔４とが係脱自
在に係止し得るようになされる。弱部９は、係止爪３の
位置における鋼板２の曲げ強度よりも鋼板２の曲げ強度
を弱くしたものである。そして、この弱部９が、係止爪
３の前方位置に配位されたものである。Means for Solving the Problems A long steel plate 2 is wound and formed sequentially from the front end side to the rear end side, and the front end side of the steel plate 2 is located at the innermost side and the rear end side is located at the outermost side. The present invention solves the above-mentioned problem by providing a spiral spring having a spiral shape and having the following features. The first invention of the present application relates to a steel plate 2 constituting a mainspring.
On the rear end side, a locking claw 3, a locking hole 4, and a weak portion 9 are provided along the longitudinal direction, respectively. The locking hole 4 is
By being arranged at a position rearward of the locking claw 3, the locking claw 3 and the locking hole 4 can be locked and unlocked in a spirally wound state. The weak portion 9 has a lower bending strength of the steel plate 2 than a bending strength of the steel plate 2 at the position of the locking claw 3. The weak portion 9 is arranged at a position in front of the locking claw 3.
【０００６】本願第２の発明は、弱部９が、鋼板２の一
部を取り除いて形成した穿設部９１を備えたものであ
る。In the second invention of the present application, the weak portion 9 includes a perforated portion 91 formed by removing a part of the steel plate 2.
【０００７】以上のように構成された本願第１の発明に
おいては、係止爪３の位置における鋼板２の曲げ強度よ
りも鋼板２の曲げ強度を弱くした弱部９を、係止爪３の
前方位置に配位させる。こうすることにより、例えばゼ
ンマイバネ１が長くて予巻きをした状態では係止爪３が
係止用孔４に入り込み、コードリール５の使用中に係止
爪３が係止用孔４に係脱するおそれのある場合でも、コ
ードリール５に装着後、ゼンマイバネ１を巻き締めて係
止爪３が係止用孔４から外れると、図６に示すようにゼ
ンマイバネ１を構成した鋼板２には曲げ力が作用し、鋼
板２における係止用孔４及び弱部９の部分が、曲げ力に
対する強度が弱くなっているため、折り曲げられる。
又、鋼板２における係止爪３を切り起こした部分も、鋼
板２の断面積が小さくなっているが、係止爪３の部分が
弱部９に接近しているため、弱部９に力が集中して係止
爪３の部分は殆ど折り曲げられずに弱部９の部分がくの
字状に折り曲げられ、その結果、鋼板２における係止用
孔４及び弱部９の部分がくの字状に折り曲げられて径外
方向に突出した状態になる。そして、この状態から、巻
き弾性によりゼンマイバネ１が径大に拡張すると、係止
用孔４及び弱部９の部分がくの字状に折り曲げられてい
るため、係止爪３と、係止爪３の外側に配位された鋼板
との間に空間２１ができ、ゼンマイバネ１の拡張に際
し、係止爪３が係止用孔４に入り込まずに通過する。従
って、使用中に、係止爪３が係止用孔４に入り込む際の
衝撃力によって係止爪３が折れたり、係止爪３の基端部
にクラックが発生するようなことを防止できる。In the first invention of the present application configured as described above, the weak portion 9 in which the bending strength of the steel plate 2 is weaker than the bending strength of the steel plate 2 at the position of the locking claw 3 is attached to the locking claw 3. Coordinate to the forward position. Thus, for example, when the mainspring 1 is long and pre-wound, the locking claw 3 enters the locking hole 4, and the locking claw 3 is disengaged from the locking hole 4 during use of the cord reel 5. Even if there is a possibility that the mainspring 1 is attached to the cord reel 5 and the locking claw 3 is disengaged from the locking hole 4 after being attached to the cord reel 5, the steel plate 2 constituting the mainspring 1 is bent as shown in FIG. The force acts, and the portions of the steel plate 2 at the locking holes 4 and the weak portions 9 are bent because the strength against bending force is weak.
The section of the steel plate 2 where the locking claw 3 is cut and raised also has a small cross-sectional area of the steel plate 2, but since the locking claw 3 is close to the weak portion 9, a force is applied to the weak portion 9. Is concentrated, the portion of the locking claw 3 is hardly bent, and the portion of the weak portion 9 is bent in a U-shape. As a result, the portion of the locking hole 4 and the portion of the weak portion 9 in the steel plate 2 are U-shaped. And is projected in a radially outward direction. When the mainspring spring 1 expands to a large diameter by winding elasticity from this state, the locking hole 4 and the weak portion 9 are bent in a dogleg shape, so that the locking claw 3 and the locking claw 3 are bent. A space 21 is formed between the spring and the steel plate arranged outside, and when the mainspring 1 is expanded, the locking claw 3 does not enter the locking hole 4 and passes therethrough. Therefore, during use, it is possible to prevent the locking claw 3 from breaking due to the impact force when the locking claw 3 enters the locking hole 4 and the occurrence of cracks at the base end of the locking claw 3. .
【０００８】本願第２の発明においては、弱部９を、鋼
板２の一部を取り除いて形成した穿設部９１を備えたも
のとする。こうすることにより、鋼板２の縦断面積を小
さくでき、曲げ強度を弱くできる。又、その際、穿設部
９１の寸法設定により、鋼板２の縦断面積を容易に確実
に決定でき、使用中に破断しない程度の強度を保持しな
がら係止爪３の位置における鋼板２の曲げ強度よりも弱
くできる。一方、製作にあたっては、係止爪３及び係止
用孔４をプレス加工する際に、穿設部９１をも一体的に
同時加工でき、従来のものに比して加工工程を増やすこ
となく行うことができる。In the second invention of the present application, the weak portion 9 is provided with a perforated portion 91 formed by removing a part of the steel plate 2. By doing so, the longitudinal sectional area of the steel sheet 2 can be reduced, and the bending strength can be reduced. Also, at this time, by setting the dimensions of the perforated portion 91, the longitudinal sectional area of the steel plate 2 can be easily and reliably determined, and the steel plate 2 is bent at the position of the locking claw 3 while maintaining the strength that does not break during use. Can be weaker than strength. On the other hand, in the production, when the locking claw 3 and the locking hole 4 are pressed, the perforated portion 91 can also be integrally processed at the same time, and the processing is performed without increasing the number of processing steps as compared with the conventional one. be able to.
【０００９】[0009]
【発明の実施の形態】以下、図を基に本願発明の一実施
形態を具体的に説明する。図１は、本願発明の一実施形
態のゼンマイバネを巻回して係止した状態の斜視図、図
２は、本願発明の一実施形態のゼンマイバネの後端側の
要部拡大斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view of a state in which the mainspring of one embodiment of the present invention is wound and locked, and FIG. 2 is an enlarged perspective view of a main part of a rear end side of the mainspring of one embodiment of the present invention.
【００１０】本実施形態のゼンマイバネ１は、電気コー
ド等のコードの引き出し巻き込みを行うコードリール用
ゼンマイバネとされており、図１に示すように弾性を有
する長尺状の鋼板２を、前端側から順次後端側にかけて
巻回成形することにより、鋼板２の前端側を最径内側
に、後端側を最径外側に夫々配して鋼板２の幅方向の両
端を略揃えた渦巻き状を呈している。The mainspring 1 of this embodiment is a mainspring for a cord reel that draws and entrains a cord such as an electric cord. As shown in FIG. By sequentially winding and forming the steel sheet 2 toward the rear end side, the steel sheet 2 has a spiral shape in which the front end side is arranged on the innermost side and the rear end side is arranged on the outermost side, and both ends in the width direction of the steel sheet 2 are substantially aligned. ing.
【００１１】このゼンマイバネ１を構成する鋼板２は、
本実施形態では、幅が８ｍｍ程度、長さ４０００ｍｍ程
度のものが使用されており、前端側には、取付け片１ａ
が備えられている。この取付け片１ａは、後述するコー
ドリール５におけるケース６に取り付けるためのもの
で、鋼板２の前端を所定長さで折り曲げ成形することに
より形成されている。The steel plate 2 constituting the spring 1 is
In the present embodiment, one having a width of about 8 mm and a length of about 4000 mm is used.
Is provided. The mounting piece 1a is for mounting on a case 6 of a cord reel 5 described later, and is formed by bending a front end of the steel plate 2 to a predetermined length.
【００１２】鋼板２の後端側には、引っ掛け片１ｂと、
引っ掛け片１ｂから長手方向の前端方向に所定距離だけ
隔てた位置に配位された係止爪３と、引っ掛け片１ｂと
係止爪３との間に配位された係止用孔４と、係止爪３の
前方位置に配位された弱部９とが備えられている。引っ
掛け片１ｂは、後述のコードリール５における下回転胴
７２に引っ掛るためのもので、鋼板２の後端を所定長さ
で径外側に略Ｕ字状に折り曲げ成形することにより形成
されている。At the rear end of the steel plate 2, a hook 1b is provided.
A locking claw 3 arranged at a position separated by a predetermined distance in the longitudinal front end direction from the hook piece 1b, a locking hole 4 arranged between the hook piece 1b and the locking claw 3, A weak portion 9 is provided at a position in front of the locking claw 3. The hook piece 1b is to be hooked on the lower rotary drum 72 of the cord reel 5 described later, and is formed by bending the rear end of the steel plate 2 to a predetermined length in a substantially U shape radially outward. .
【００１３】係止爪３と係止用孔４とは、ゼンマイバネ
１を所定径の渦巻き状を呈する状態で係止しておくため
の係止手段をなすもので、係止爪３は、鋼板２の一部を
所定の幅及び長さで径外側に切り起こすことにより形成
されている。本実施形態では、係止爪３は、鋼板２の幅
方向の中央部を１．４ｍｍ程度の幅で切り起こしてい
る。従って、係止爪３を切り起こした後の鋼板２は、係
止爪３の幅及び長さの大きさの切り起こし孔３１が穿設
されている。一方、係止用孔４は、鋼板２の幅方向の中
央部を、２．２ｍｍ程度の幅で、係止爪３の長さより長
く穿設されており、図１に示すように鋼板２を前端側か
ら順次後端側にかけて渦巻き状に巻回して鋼板２の幅方
向の上下両端側を略揃えた渦巻き状の状態で、係止爪３
が係止用孔４に出入り自在に入り込み、両者が係止でき
るようになされている。The locking claw 3 and the locking hole 4 serve as locking means for locking the mainspring 1 in a spiral shape having a predetermined diameter. It is formed by cutting and raising a part of 2 at a predetermined width and length to the outside of the diameter. In the present embodiment, the locking claw 3 has a central portion in the width direction of the steel plate 2 cut and raised with a width of about 1.4 mm. Therefore, the cut-and-raised hole 31 of the width and length of the locking claw 3 is formed in the steel plate 2 after the locking claw 3 has been cut and raised. On the other hand, the locking hole 4 is formed at a central portion in the width direction of the steel plate 2 with a width of about 2.2 mm and longer than the length of the locking claw 3, and as shown in FIG. The locking claw 3 is wound in a spiral shape in which the upper and lower ends in the width direction of the steel plate 2 are substantially aligned in a spiral shape from the front end side to the rear end side.
Can freely enter and exit the locking holes 4 so that both can be locked.
【００１４】弱部９は、鋼板２の曲げ強度を、係止爪３
の位置における鋼板２の曲げ強度よりも弱くした部分
で、鋼板２の一部を取り除いて形成した穿設部９１を備
えている。本実施形態では、穿設部９１を、係止爪３か
ら長手方向に沿って２．５ｍｍ程度だけ隔てた前方位置
に、鋼板２の幅方向の中央部を幅２．２ｍｍ程度、長さ
６ｍｍ程度の穿設した穿設孔９１から構成している。The weak portion 9 controls the bending strength of the steel plate 2
And a perforated portion 91 formed by removing a part of the steel plate 2 at a position weaker than the bending strength of the steel plate 2 at the position. In this embodiment, the center of the steel plate 2 in the width direction is about 2.2 mm wide and 6 mm long at the front position where the perforated portion 91 is separated from the locking claw 3 by about 2.5 mm in the longitudinal direction. It is constituted by a perforation hole 91 perforated.
【００１５】これらの係止爪３と、係止用孔４と、穿設
孔９１とは、金型によって一体的に同時に打ち抜き加工
されている。鋼板２の曲げ強度を弱くする手段として
は、上記本願発明のように鋼板２の一部を取り除いた穿
設部９１を形成することにより鋼板２の縦断面積を小さ
くする方法以外の他の方法も考えられるが、穿設部９１
を採用することにより、上記のように係止爪３と係止用
孔４と穿設孔９１とを金型によって一体的に同時に打ち
抜き加工でき、係止爪３と係止用孔４とを有する従来の
ゼンマイバネに比し、工程を増やすことなく同じ工程で
加工でき、コスト高になるのを防止できる。しかも、穿
設部９１の寸法設定により、鋼板２の縦断面積を容易に
確実に決定でき、使用中に破断しない程度の強度を保持
しながら係止爪３の位置における鋼板２の曲げ強度より
も弱くできる。The locking claw 3, the locking hole 4, and the perforated hole 91 are integrally and simultaneously punched by a mold. As means for weakening the bending strength of the steel sheet 2, other than the method of reducing the longitudinal cross-sectional area of the steel sheet 2 by forming the perforated portion 91 in which a part of the steel sheet 2 is removed as in the present invention described above, there is also a method. It is conceivable that the perforated portion 91
As described above, the locking claw 3, the locking hole 4 and the perforated hole 91 can be integrally and simultaneously punched by a mold as described above. Compared with a conventional spring having a conventional spring, it can be processed in the same step without increasing the number of steps, and can prevent an increase in cost. In addition, by setting the dimensions of the perforated portion 91, the longitudinal sectional area of the steel plate 2 can be easily and reliably determined, and the strength of the steel plate 2 is not broken during use. Can be weak.
【００１６】以上のように構成したゼンマイバネ１は、
係止爪３が係止用孔４に入り込んで所定径の渦巻き状を
呈する状態からコードリール５に装着されるが、この装
着の説明に先立ってコードリール５について、図３に基
づき簡単に説明する。The mainspring 1 constructed as above is
The locking claw 3 enters the locking hole 4 and is mounted on the code reel 5 in a state of having a spiral shape having a predetermined diameter. Prior to the description of the mounting, the code reel 5 will be briefly described with reference to FIG. I do.
【００１７】このコードリール５は、従来から使用され
ているものと同構成を採るもので、図３に示すように所
定厚さの円盤状をなすケース６を備えている。又、この
ケース６の内部には、回転自在な円板状の上回転胴７１
と、この上回転胴７１と一体に形成された下回転胴７２
とが備えられており、２つの回転胴７１、７２によっ
て、ケース６内が上、中、下の３つの空間部６１、６
２、６３に区画されている。上空間部６１は、第２巻回
部６１をなし、常時第２巻回部に配位されてケース６外
に引き出されることのない部分のコード１０を収納す
る。中空間部６２は、第１巻回部６２をなし、ケース６
外に引き出される部分のコード１０を収納する。下空間
部６３は、下回転胴７２の下面から下方に円形状に突設
された区画壁７２ａによって更に、径外側のレバー収納
部６４と、径内側のゼンマイバネ収納部６５とに区画さ
れている。レバー収納部６４は、後端側を下回転胴７２
に回動自在に接続されたストップレバー８が収納され、
下回転胴７２の回動に伴って、ストップレバー８の前端
がケース６の内下面に形成された案内溝（図示せず）を
摺動することによって、ケース６から所定長さだけ引き
出した第１巻回部６２のコード１０をその状態で係止し
得るようになされている。一方、ゼンマイバネ収納部６
５は、図５に示すようにゼンマイバネ１の取付け片１ａ
を取り付けるための取付け用溝６６ａと、ゼンマイバネ
１の引っ掛け片１ｂを引っ掛けるための引っ掛け部６７
とを備えている。取付け用溝６６ａは、ケース６の中心
部に設けられた固定軸６６に、取付け片１ａを嵌挿可能
な溝を形成することにより形成されており、引っ掛け部
６７は、区画壁７２ａの一部がなしている。The code reel 5 has the same configuration as that conventionally used, and includes a disk-shaped case 6 having a predetermined thickness as shown in FIG. Further, inside the case 6, a rotatable disk-shaped upper rotating body 71 is provided.
And a lower rotary drum 72 integrally formed with the upper rotary drum 71.
The inside of the case 6 is divided into three upper, middle, and lower spaces 61, 6 by two rotating drums 71, 72.
It is divided into 2, 63. The upper space portion 61 forms a second winding portion 61, and accommodates a portion of the cord 10 which is always arranged in the second winding portion and is not drawn out of the case 6. The middle space portion 62 forms a first winding portion 62 and the case 6
The part of the cord 10 to be pulled out is stored. The lower space portion 63 is further divided into a radial outer lever housing portion 64 and a radial inner spring spring housing portion 65 by a partition wall 72 a protruding downward from the lower surface of the lower rotating body 72 in a circular shape. . The lever storage portion 64 has a lower rotating body 72 at the rear end.
The stop lever 8 rotatably connected to is housed,
The front end of the stop lever 8 slides in a guide groove (not shown) formed on the inner and lower surfaces of the case 6 with the rotation of the lower rotary body 72, and is pulled out of the case 6 by a predetermined length. The cord 10 of the one turn 62 can be locked in that state. On the other hand, the spring storage section 6
5 is a mounting piece 1a of the mainspring 1 as shown in FIG.
And a hook 67 for hooking the hook 1b of the mainspring 1.
And The mounting groove 66a is formed by forming a groove in which the mounting piece 1a can be inserted into a fixed shaft 66 provided at the center of the case 6, and the hook portion 67 is a part of the partition wall 72a. Has done.
【００１８】そして、ゼンマイバネ１は、図４に示すよ
うに係止爪３が係止用孔４に入り込んで所定径の渦巻き
状を呈する状態からゼンマイバネ収納部６５に、ゼンマ
イバネ１の取付け片１ａが取付け用溝６６ａに嵌挿され
ることによりケース６に取り付けられ、引っ掛け片１ｂ
が引っ掛け部６７に引っ掛けられることにより回転胴７
１、７２に接続され、その状態で、収納される。そし
て、その後、回転胴７１、７２を、ゼンマイバネ１を巻
き締める方向（図４のＸ方向）に２〜３回程度回動させ
て予巻きを行う。これにより、図５に示すようにゼンマ
イバネ１における径内側の部分が巻き締められて径が小
さくなるが、ゼンマイバネ１における径外側の部分は、
２〜３回程度の予巻きでは影響を受けずにそのままの状
態を維持し、係止爪３が係止用孔４に入り込んだ状態に
維持されている。As shown in FIG. 4, the spring spring 1 has an attachment piece 1a for the spring 1 in the spring spring housing 65 from the state in which the locking claw 3 enters the locking hole 4 and assumes a spiral shape having a predetermined diameter. It is attached to the case 6 by being inserted into the attachment groove 66a, and the hook piece 1b
Is hooked on the hooking portion 67, so that the rotating body 7
1, 72, and stored in that state. After that, the rotary drums 71 and 72 are rotated about two or three times in the direction in which the mainspring spring 1 is wound (X direction in FIG. 4) to perform prewinding. As a result, as shown in FIG. 5, the radially inner portion of the mainspring 1 is wound and reduced in diameter, but the radially outer portion of the mainspring 1 is
In the pre-winding of about two or three times, the state is maintained as it is without being affected, and the state where the locking claw 3 enters the locking hole 4 is maintained.
【００１９】以上のようにしてゼンマイバネ１を装着し
たコードリール５は、ケース６外に配位されたコード１
０の先端を引っぱる。これにより、回転胴７１、７２が
ゼンマイバネ１を巻き締める方向（図５のＸ方向）に回
動し、回転胴７１、７２に沿って巻かれたケース６内の
コード１０をケース６外に引き出すことができる。コー
ド１０を引き出した後は、手を放せばストップレバー８
の作用により回転胴７１、７２が停止し、その状態を維
持することができる。又、コード１０を所定長さだけ引
っ張た時点で、図６に示すようにゼンマイバネ１の径外
側の部分も巻き締められて係止爪３が係止用孔４から外
れる。係止爪３が係止用孔４から外れると、図６に示す
ようにゼンマイバネ１を構成した鋼板２には常時曲げ力
が作用し、鋼板２における係止用孔４及び穿設孔９の部
分が、係止用孔４、穿設孔９１各々によって鋼板２の断
面積が小さくなって曲げ力に対する強度が弱くなってい
るため、くの字状に折り曲げられる。又、鋼板２におけ
る切り起こし孔３１の部分も、鋼板２の断面積が小さく
なっているが、切り起こし孔３１の部分が穿設孔９１に
接近しているため、穿設孔９１の部分に力が集中して穿
設孔９の部分が折り曲げられて切り起こし孔３１の部分
は殆ど折り曲げられない。従って、ゼンマイバネ１は、
係止爪３が係止用孔４から外れた状態、即ちコード１０
を引き出して使用している間に、係止用孔４及び穿設孔
９１の部分が徐々にくの字状に折り曲げられ、図６に示
すように係止用孔４及び穿設孔９１各々の部分が径外方
向に突出した状態になる。The cord reel 5 on which the mainspring 1 is mounted as described above is mounted on the cord 1 arranged outside the case 6.
Pull the zero tip. Accordingly, the rotating drums 71 and 72 rotate in the direction (X direction in FIG. 5) for winding the mainspring 1, and the cord 10 in the case 6 wound along the rotating drums 71 and 72 is pulled out of the case 6. be able to. After pulling out the cord 10, release the stop lever 8
The rotation cylinders 71 and 72 are stopped by the action of, and that state can be maintained. Further, when the cord 10 is pulled by a predetermined length, the outer portion of the mainspring 1 is also wound around as shown in FIG. When the locking claw 3 is disengaged from the locking hole 4, a bending force is constantly applied to the steel plate 2 constituting the spring 1 as shown in FIG. Since the cross-sectional area of the steel plate 2 is reduced by the locking holes 4 and the perforated holes 91 and the strength against the bending force is weakened, the portion is bent in a U shape. The cross-sectional area of the steel plate 2 in the cut-and-raised hole 31 is also small. However, since the cut-and-raised hole 31 is close to the drilled hole 91, the cut-and-raised hole 31 is close to the drilled hole 91. The force is concentrated and the perforated hole 9 is bent and cut and raised, and the hole 31 is hardly bent. Therefore, the mainspring 1
The state in which the locking claw 3 is removed from the locking hole 4, that is, the cord 10
During the use of the locking holes 4 and the perforation holes 91, the portions of the locking holes 4 and the perforation holes 91 are gradually bent in a U-shape, as shown in FIG. Is projected in a radially outward direction.
【００２０】一方、引き出したコード１０を、更に僅か
に引き出して手を放せばストップレバー８による回転胴
７１、７２の停止が解かれ、巻き締められたゼンマイバ
ネ１を巻き弾性により回転胴７１、７２が上記と反対方
向に回転し、これに伴いケース６外に引き出されたコー
ド１０が回転胴７１、７２に沿って巻かれ、ケース６内
に巻き込むことができる。又、ゼンマイバネ１は、図７
に示すように巻き弾性により径大に拡張するが、係止用
孔４及び穿設孔９１の部分がくの字状に折り曲げられて
いるため、係止爪３と、係止爪３の外側に配位された鋼
板との間に空間２１ができ、ゼンマイバネ１の拡張に際
し、係止爪３が係止用孔４に入り込まずに通過する。従
って、使用中に、係止爪３が係止用孔４に入り込む際の
衝撃力によって係止爪３が折れたり、係止爪３の基端部
にクラックが発生するようなことを防止できる。尚、折
り曲げの量が少ない使用開始当初は、係止爪３が係止用
孔４に入り込む場合もあるが、使用により徐々に折り曲
げられて係止爪３が係止用孔４に入り込めなくなる。On the other hand, if the cord 10 is pulled out a little further and released, the stop of the rotating barrels 71 and 72 by the stop lever 8 is released, and the wound springs 1 are wound around the rotating barrels 71 and 72 by elasticity. Rotates in the opposite direction to that described above, whereby the cord 10 drawn out of the case 6 is wound along the rotating bodies 71 and 72 and can be wound into the case 6. The mainspring 1 is shown in FIG.
As shown in FIG. 5, the diameter is expanded by the winding elasticity. However, since the locking hole 4 and the perforated hole 91 are bent in a U-shape, the locking claw 3 and the outside of the locking claw 3 are formed. A space 21 is formed between the steel plate and the arranged steel plate. When the mainspring 1 is expanded, the locking claw 3 passes through the locking hole 4 without entering the locking hole 4. Therefore, during use, it is possible to prevent the locking claw 3 from breaking due to the impact force when the locking claw 3 enters the locking hole 4 and the occurrence of cracks at the base end of the locking claw 3. . At the beginning of use when the amount of bending is small, the locking claw 3 may enter the locking hole 4 in some cases, but is gradually bent by use so that the locking claw 3 cannot enter the locking hole 4. .
【００２１】次に、本願発明のゼンマイバネ１の疲労試
験を行ったので、その結果を下記の表１に示す。この疲
労試験は、本願発明のゼンマイバネ１として上記実施形
態のもの３個を試料とし（試料ＮＯ１〜３、以下、「本
願発明品」という）、これらについて、コード１０を全
部引き出した状態までゼンマイバネ１を巻き締め、その
後、コード１０を全部引き戻した状態に巻き戻すまでの
工程を一回とし、これを繰り返すことにより行った。
又、同時に比較例として、穿設孔９１を設けていない同
長さのゼンマイバネ３個（試料ＮＯ４〜６、以下、「比
較例」という）について同条件で行った。尚、比較例３
個（試料ＮＯ４〜６）の係止爪及び係止用孔の寸法は、
本願発明品と同じにした。Next, a fatigue test was performed on the spring 1 of the present invention, and the results are shown in Table 1 below. In this fatigue test, three spring springs 1 of the above embodiment were used as samples of the spring spring 1 of the present invention (samples Nos. 1 to 3; hereinafter, referred to as “the present invention”). Was wound up, and thereafter, the process of rewinding the cord 10 to the fully pulled-back state was performed once, and this was repeated.
At the same time, as a comparative example, three mainspring springs of the same length without the perforation holes 91 (samples Nos. 4 to 6, hereinafter referred to as “comparative examples”) were performed under the same conditions. Comparative Example 3
The dimensions of the locking claws and the locking holes of the individual pieces (samples Nos. 4 to 6)
The same as the invention of the present application.
【００２２】[0022]
【表１】 [Table 1]
【００２３】この表１に示すように、比較例は、１５０
０回〜３６００回で、クラックの発生は目視で見られな
かったが、全て係止爪３が破損した。これに対し、本願
発明品は全て３００００回以上で、係止爪３の折れや係
止爪３の基端部へのクラックは見られず、ゼンマイバネ
１の前端部で破断した。従って、本願発明品は、係止爪
３及び係止用孔４を全く設けていないものと相違がな
く、係止爪３及び係止用孔４による影響は現れなかっ
た。As shown in Table 1, the comparative example was 150
At 0 to 3600 times, no crack was visually observed, but all the locking claws 3 were broken. On the other hand, all the products of the present invention were broken at the front end of the mainspring 1 without any breakage of the locking claw 3 and no crack at the base end of the locking claw 3 after 30,000 times. Therefore, the product of the present invention is not different from the one in which the locking claw 3 and the locking hole 4 are not provided at all, and the influence of the locking claw 3 and the locking hole 4 did not appear.
【００２４】以上のように構成したゼンマイバネ１を使
用することにより、ゼンマイバネ１が長くて予巻きをし
た状態では係止爪３が係止用孔４に入り込み、コードリ
ール５の使用中に係止爪３が係止用孔４に係脱するおそ
れのある場合でも、係止爪３の折れや係止爪３の基端部
へのクラックの発生を防止でき、使用中にゼンマイバネ
１の機能の低下や破損することなく円滑に使用し得るも
のにできる。By using the mainspring 1 configured as described above, when the mainspring 1 is long and is pre-wound, the locking claw 3 enters the locking hole 4 and is locked during use of the cord reel 5. Even when the pawl 3 is likely to be disengaged from the locking hole 4, it is possible to prevent the locking pawl 3 from breaking or cracking at the base end of the pawl 3, and to prevent the function of the spring 1 during use. It can be used smoothly without being lowered or damaged.
【００２５】尚、本実施形態では、穿設部９１として四
角形状の穿設孔９１を一つだけ設けているが、ゼンマイ
バネ２の一部を取り除いて縦断面積を少なくして曲げ強
度を弱くする形態のものであれば良く、例えば図８(A)
に示すように複数の穿設孔９１…９１を、鋼板２の幅方
向に並設するようにして縦断面積を少なくしても良い。
或いは、図８(B) に示すように上端及び下端各々の一部
をカットして穿設部９１、９１を形成し、更には、ゼン
マイバネ２の上端又は下端一部をカットすることにより
穿設部９１を形成して縦断面積を少なくするようにして
も良い。又、穿設部９１は、係止爪３の位置における鋼
板２の縦断面積（図２のＡ−Ａに沿う断面における面
積）より、穿設部９１の位置における鋼板２の縦断面積
（図２のＢ−Ｂに沿う断面における面積）が小さくして
おくようにすれば、係止爪３の位置及び穿設部９１の位
置の双方に同時に曲げ力がかかった場合、曲げ強度の弱
い穿設部９１の位置に集中応力がかかり、穿設部９１の
位置が曲がるため、係止爪３の位置における鋼板２の縦
断面積より、穿設部９１の位置における鋼板２の縦断面
積が小さくしておくように穿設部９１を設定しておくの
が好ましい。一方、穿設部９１の位置における鋼板２の
縦断面積を、鋼板２の縦断面積の１／２程度以上にする
と、強度面で弱くなるなるおそれが生じるので、穿設部
９１の位置における鋼板２の縦断面積を、鋼板２の縦断
面積の１／２程度以下にしておくのが好ましい。一方、
係止爪３に対する弱部９の位置は、穿設部９１の部分が
くの字状に折り曲げられて係止爪３と、係止爪３の外側
に配位された鋼板との間に空間２１ができ、ゼンマイバ
ネ１の拡張に際し、係止爪３が係止用孔４に入り込まな
い位置であれば良く、より具体的には、係止爪３からの
距離Ｌ（図２に図示）が２〜５ｍｍ程度の位置に設けて
おくのが好ましく、そのような位置であれば確実に空間
２１の形成によりゼンマイバネ１の拡張に際して係止爪
３が係止用孔４に入り込めないようにできる。In this embodiment, only one rectangular hole 91 is provided as the hole 91, but a part of the mainspring 2 is removed to reduce the vertical cross-sectional area and reduce the bending strength. Any form may be used. For example, FIG.
May be arranged in parallel in the width direction of the steel plate 2 to reduce the vertical sectional area.
Alternatively, as shown in FIG. 8 (B), a part of each of the upper and lower ends is cut to form perforated portions 91, 91, and furthermore, a part of the upper or lower end of the mainspring 2 is cut. The portion 91 may be formed to reduce the vertical sectional area. The perforated portion 91 is based on the vertical cross-sectional area of the steel plate 2 at the position of the locking claw 3 (the area in the cross section along the line AA in FIG. 2). If the bending force is applied to both the position of the locking claw 3 and the position of the perforated portion 91 at the same time, the perforation with weak bending strength is performed. Since the concentrated stress is applied to the position of the portion 91 and the position of the perforated portion 91 is bent, the vertical cross-sectional area of the steel plate 2 at the position of the perforated portion 91 is made smaller than the vertical cross-sectional area of the steel plate 2 at the position of the locking claw 3. It is preferable to set the perforated portion 91 so as to keep it. On the other hand, if the vertical cross-sectional area of the steel plate 2 at the position of the perforated portion 91 is set to about 1/2 or more of the vertical cross-sectional area of the steel plate 2, there is a possibility that the strength becomes weaker. It is preferable that the vertical cross-sectional area of the steel sheet 2 is about 1/2 or less of the vertical cross-sectional area of the steel plate 2. on the other hand,
The position of the weak portion 9 with respect to the locking claw 3 is such that a space 21 is formed between the locking claw 3 and the steel plate arranged outside the locking claw 3 when the portion of the perforated portion 91 is bent in a U-shape. When the mainspring 1 is expanded, it is sufficient that the locking claw 3 does not enter the locking hole 4. More specifically, the distance L (shown in FIG. 2) from the locking claw 3 is 2. It is preferable that the locking claw 3 be provided at a position of about 5 mm or so, so that the locking claw 3 cannot enter the locking hole 4 when the mainspring spring 1 is expanded by forming the space 21 reliably.
【００２６】又、本願発明のゼンマイバネ１を使用する
コードリールは、上記形態のものに限らず、従来から使
用されているものに使用できる。又、本願発明のゼンマ
イバネ１の用途は、コードリールに使用するものに限ら
ず、他の種々の装置等にも使用でき、適宜変更できる。Further, the cord reel using the mainspring 1 of the present invention is not limited to the above-mentioned embodiment, but may be used for a conventional one. The application of the mainspring 1 of the present invention is not limited to the one used for a cord reel, but can be used for other various devices and the like, and can be appropriately changed.
【００２７】更に、本実施形態では、長さの長いゼンマ
イバネ１に穿設部９１を設けて弱部９を設けているが、
弱部９を設けてもゼンマイバネとしての強度は十分に保
持しており、予巻きにより係止爪３が係止用孔４から外
れるような長さの短いものに弱部９を設けるようにして
使用しても良く、適宜変更し得る。Further, in this embodiment, the weakened portion 9 is provided by forming the perforated portion 91 in the long mainspring 1.
Even if the weak portion 9 is provided, the strength as the mainspring spring is sufficiently maintained, and the weak portion 9 is provided on a member having a short length such that the locking claw 3 is disengaged from the locking hole 4 by pre-winding. It may be used and may be changed as appropriate.
【００２８】[0028]
【発明の効果】以上、本願第１の発明のゼンマイバネ１
は、例えばゼンマイバネ１が長くて予巻きをした状態で
は係止爪３が係止用孔４に入り込み、コードリール５の
使用中に係止爪３が係止用孔４に係脱するおそれのある
場合でも、コードリール５に装着後、ゼンマイバネ１を
巻き締めて係止爪３が係止用孔４から外れると、曲げ力
が作用し、鋼板２における係止用孔４及び弱部９の部分
がくの字状に折り曲げられて径外方向に突出した状態に
なり、この状態から、巻き弾性によりゼンマイバネ１が
径大に拡張すると、係止爪３と、係止爪３の外側に配位
された鋼板との間に空間２１ができ、ゼンマイバネ１の
拡張に際し、係止爪３が係止用孔４に入り込まずに通過
する。従って、使用中に、係止爪３が係止用孔４に入り
込む際の衝撃力によって係止爪３が折れたり、係止爪３
の基端部にクラックが発生するようなことを防止でき、
ゼンマイバネ１の機能を維持しておけるものにできる。As described above, the mainspring 1 of the first invention of the present application is described above.
For example, when the mainspring 1 is long and pre-wound, the locking claw 3 may enter the locking hole 4 and the locking claw 3 may be disengaged from the locking hole 4 during use of the cord reel 5. Even in this case, when the locking claw 3 comes off from the locking hole 4 after the mainspring 1 has been mounted on the cord reel 5 and the locking claw 3 has come off from the locking hole 4, a bending force acts, and the locking hole 4 and the weak portion 9 in the steel plate 2 are formed. The portion is bent in a U-shape to project outward in a radial direction. From this state, when the mainspring 1 expands to a large diameter due to the winding elasticity, it is positioned outside the locking claw 3 and the locking claw 3. A space 21 is formed between the spring plate 1 and the spring plate 1, and when the mainspring 1 is expanded, the locking claw 3 passes through the locking hole 4 without entering the locking hole 4. Therefore, during use, the locking claw 3 is broken by the impact force when the locking claw 3 enters the locking hole 4 or the locking claw 3
Cracks can be prevented at the base end of the
The function of the mainspring 1 can be maintained.
【００２９】本願第２の発明は、穿設部９１によって鋼
板２の縦断面積を小さくでき、曲げ強度を弱くできる。
又、その際、穿設部９１の寸法設定により、鋼板２の縦
断面積を容易に確実に決定でき、使用中に破断しない程
度の強度を保持しながら係止爪３の位置における鋼板２
の曲げ強度よりも弱くできる。一方、製作にあたって
は、係止爪３及び係止用孔４をプレス加工する際に、穿
設部９１をも一体的に同時加工でき、従来のものに比し
て加工工程を増やすことなく行うことができる。従っ
て、弱部９を、容易に確実に、しかも経済的に形成でき
る。According to the second aspect of the present invention, the longitudinal section of the steel plate 2 can be reduced by the perforated portion 91, and the bending strength can be reduced.
Also, at this time, by setting the dimensions of the perforated portion 91, the longitudinal sectional area of the steel plate 2 can be easily and reliably determined, and the steel plate 2 at the position of the locking claw 3 while maintaining the strength that does not break during use.
Can be weaker than the bending strength of On the other hand, in the production, when the locking claw 3 and the locking hole 4 are pressed, the perforated portion 91 can also be integrally processed at the same time, and the processing is performed without increasing the number of processing steps as compared with the conventional one. be able to. Therefore, the weak portion 9 can be easily, reliably and economically formed.
【図１】本願発明の一実施形態のゼンマイバネの斜視図
である。FIG. 1 is a perspective view of a mainspring according to an embodiment of the present invention.
【図２】本願発明の一実施形態のゼンマイバネの後端側
の要部拡大斜視図である。FIG. 2 is an enlarged perspective view of a main part of a rear end side of a mainspring according to an embodiment of the present invention.
【図３】ゼンマイバネを装着したコードリールの縦断面
説明図である。FIG. 3 is an explanatory longitudinal sectional view of a cord reel on which a mainspring is mounted.
【図４】コードリールに、係止爪と係止用孔とを係止し
たゼンマイバネを装着した状態の下方側から見た説明図
である。FIG. 4 is an explanatory view seen from below of a state in which a spring having a locking claw and a locking hole fixed thereto is mounted on the cord reel;
【図５】コードリールに装着したゼンマイバネを予巻き
した状態の下方側から見た説明図である。FIG. 5 is an explanatory view seen from below of a state in which a mainspring mounted on a cord reel is pre-wound.
【図６】予巻きした状態からコードを引き出しゼンマイ
バネを巻き締めて係止爪と係止用孔との係止を外した状
態の下方側から見た説明図である。FIG. 6 is an explanatory view seen from below of a state in which the cord is pulled out from the pre-wound state and the mainspring is wound up to release the locking between the locking claw and the locking hole.
【図７】係止爪と係止用孔との係止を外した図６の状態
からゼンマイバネを拡張させた状態の下方側から見た説
明図である。7 is an explanatory view of the state in which the mainspring is expanded from the state of FIG. 6 in which the locking claw and the locking hole are released, as viewed from below.
【図８】(A) は、ゼンマイバネの他の実施形態の要部拡
大斜視図、(B) は、ゼンマイバネの更に他の実施形態の
要部拡大斜視図である。FIG. 8A is an enlarged perspective view of a main part of another embodiment of the mainspring, and FIG. 8B is an enlarged perspective view of the main part of still another embodiment of the mainspring.
【図９】(A) は、従来のゼンマイバネの斜視図、(B)
は、従来のゼンマイバネにおける後端側の要部拡大斜視
図である。FIG. 9A is a perspective view of a conventional spring, and FIG.
FIG. 4 is an enlarged perspective view of a main part on the rear end side of a conventional mainspring.
【図１０】コードリールに、係止爪と係止用孔とを係止
した従来のゼンマイバネを装着した状態の下方側から見
た説明図である。FIG. 10 is an explanatory diagram viewed from below of a state in which a conventional spring having a locking claw and a locking hole fixed thereto is mounted on a cord reel.
【図１１】コードリールに装着した従来のゼンマイバネ
を予巻きした状態の説明図である。FIG. 11 is an explanatory view of a state in which a conventional mainspring mounted on a cord reel is pre-wound.
１ ゼンマイバネ １ａ 取付け片 １ｂ 引っ掛け片 ２ 鋼板 ３ 係止爪 ４ 係止用孔 ５ コードリール ６ ケース ９ 弱部 ６５ ゼンマイバネ収納部 ７１ 上回転胴 ７２ 下回転胴 ９１ 穿設部 DESCRIPTION OF SYMBOLS 1 Mainspring 1a Mounting piece 1b Hook piece 2 Steel plate 3 Locking claw 4 Locking hole 5 Cord reel 6 Case 9 Weak part 65 Mainspring spring storage part 71 Upper rotating body 72 Lower rotating body 91 Perforated part
Claims (2)
端側にかけて巻回成形し、鋼板(2) の前端側を最径内側
に、後端側を最径外側に夫々配して渦巻き状としたゼン
マイバネにおいて、 このゼンマイバネを構成する鋼板(2) の後端側には、係
止爪(3) と、係止用孔(4) と、弱部(9) とが、長手方向
に沿って夫々備えられ、 係止用孔(4) が、係止爪(3) の後方位置に配位されるこ
とにより、渦巻き状に巻回された状態で、係止爪(3) と
係止用孔(4) とが係脱自在に係止し得るようになされ、 弱部(9) が、係止爪(3) の位置における鋼板(2) の曲げ
強度よりも鋼板(2) の曲げ強度を弱くしたものであり、
この弱部(9) が、係止爪(3) の前方位置に配位されたも
のであることを特徴とするゼンマイバネ。A long steel plate (2) is formed by winding from the front end side to the rear end side in order, and the front end side of the steel plate (2) is the innermost diameter side, and the rear end side is the outermost diameter side. In the spiral spring arranged in a spiral shape, a locking claw (3), a locking hole (4), and a weak portion (9) are provided at the rear end side of the steel plate (2) constituting the spring. The locking claw (4) is provided along the longitudinal direction, and the locking claw (3) is disposed at a position rearward of the locking claw (3). 3) and the locking hole (4) can be engaged and disengaged, and the weak portion (9) is smaller than the bending strength of the steel plate (2) at the position of the locking claw (3). The bending strength of (2) is reduced,
The mainspring is characterized in that the weak portion (9) is arranged at a position in front of the locking claw (3).
て形成した穿設部(91)を備えたものであることを特徴と
する請求項１記載のゼンマイバネ。2. The mainspring according to claim 1, wherein the weak portion has a perforated portion formed by removing a part of the steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02257698A JP4074700B2 (en) | 1998-01-19 | 1998-01-19 | Wind-up spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02257698A JP4074700B2 (en) | 1998-01-19 | 1998-01-19 | Wind-up spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11201207A true JPH11201207A (en) | 1999-07-27 |
| JP4074700B2 JP4074700B2 (en) | 2008-04-09 |
Family
ID=12086706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02257698A Expired - Fee Related JP4074700B2 (en) | 1998-01-19 | 1998-01-19 | Wind-up spring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4074700B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007224772A (en) * | 2006-02-22 | 2007-09-06 | Toshiba Home Technology Corp | Electric fan |
| CN107117501A (en) * | 2017-05-24 | 2017-09-01 | 歌尔科技有限公司 | A kind of drawing and pulling type spiral module |
| CN107366701A (en) * | 2017-08-10 | 2017-11-21 | 安庆谢德尔汽车零部件有限公司 | A kind of clockwork spring |
-
1998
- 1998-01-19 JP JP02257698A patent/JP4074700B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007224772A (en) * | 2006-02-22 | 2007-09-06 | Toshiba Home Technology Corp | Electric fan |
| CN107117501A (en) * | 2017-05-24 | 2017-09-01 | 歌尔科技有限公司 | A kind of drawing and pulling type spiral module |
| CN107117501B (en) * | 2017-05-24 | 2020-02-07 | 歌尔科技有限公司 | Pull formula spiral module |
| CN107366701A (en) * | 2017-08-10 | 2017-11-21 | 安庆谢德尔汽车零部件有限公司 | A kind of clockwork spring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4074700B2 (en) | 2008-04-09 |
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