JP6013224B2

JP6013224B2 - Hairspring, movement, watch, and method for manufacturing hairspring

Info

Publication number: JP6013224B2
Application number: JP2013030300A
Authority: JP
Inventors: 猶貴天野; 祥太郎神山; 重城　幸一郎; 幸一郎重城
Original assignee: Seiko Instruments Inc
Current assignee: Seiko Instruments Inc
Priority date: 2013-02-19
Filing date: 2013-02-19
Publication date: 2016-10-25
Anticipated expiration: 2033-02-19
Also published as: JP2014160002A

Description

本発明は、機械式時計のてんぷに使用されるひげぜんまい、ひげぜんまいを備えるムーブメント、ひげぜんまいを備える時計、及びひげぜんまいの製造方法に関する。 The present invention relates to a hairspring used for a balance of a mechanical timepiece, a movement including a hairspring, a timepiece including a hairspring, and a method for manufacturing the hairspring.

従来、機械式時計のてんぷには弾性体からなる帯状のばねを渦巻状に癖付けしたひげぜんまいが使用される。例えば特許文献１には機械式時計が記載される。機械式時計は、ぜんまいの力により香箱が回転し、香箱の回転が二番歯車から四番歯車等により構成される輪列に伝達される。輪列の回転速度は、てんぷ、アンクル及びがんぎ車からなる脱進部により規制され、一定歩度で時を刻むように構成される。 Conventionally, a balance spring in which a belt-like spring made of an elastic body is wound in a spiral shape is used for a balance of a mechanical timepiece. For example, Patent Document 1 describes a mechanical timepiece. In the mechanical timepiece, the barrel is rotated by the power of the mainspring, and the rotation of the barrel is transmitted from the second gear to the wheel train constituted by the fourth gear and the like. The rotational speed of the train wheel is regulated by an escapement unit composed of a balance with balance, ankle and escape wheel, and is configured to keep time at a constant rate.

図９は時計のてんぷ１１０の模式図である。てんぷ１１０は、ひげぜんまい１００と、ひげぜんまい１００の内端に接続するひげ玉１１３と、ひげぜんまい１００の外端に接続するひげ持１１４と、ひげ玉１１３の軸心となるてん真１１２と、てん真１１２に接続され、てん真１１２を回転軸として往復回転振動を行うてん輪１１１から構成される。機械式時計の歩度精度はこの往復回転振動の振動周期により決定される。てん輪１１１の振動周期は、てん真１１２の回転を付勢するひげぜんまい１００の回転付勢力（トルク）と、てん輪１１１の慣性モーメントにより決まる。ひげぜんまい１００は回転付勢力が温度変化や姿勢差によって影響を受けないように形成する必要がある。ひげぜんまい１００はてん真１１２の回転に伴って渦巻が伸縮するが、渦巻が同心円状に伸縮し渦巻の重心が常に回転軸の軸心の位置となるように形成することが望ましい。 FIG. 9 is a schematic diagram of a timepiece balance 110. The balance with hairspring 110 includes a hairspring 100, a hairball 113 connected to the inner end of the hairspring 100, a beard 114 connected to the outer end of the hairspring 100, and a balance stem 112 serving as the axial center of the hairspring 113. A balance wheel 111 is connected to the balance stem 112 and performs reciprocating rotational vibration with the balance stem 112 as a rotation axis. The rate accuracy of the mechanical timepiece is determined by the vibration period of this reciprocating rotational vibration. The vibration cycle of the balance wheel 111 is determined by the rotational biasing force (torque) of the balance spring 100 that biases the rotation of the balance stem 112 and the moment of inertia of the balance wheel 111. The hairspring 100 needs to be formed so that the rotational urging force is not affected by a temperature change or a posture difference. The hairspring 100 expands and contracts with the rotation of the spring 112, but it is desirable to form the spiral so as to concentrically expand and contract so that the center of gravity of the spiral is always at the position of the axis of the rotation shaft.

図１０は、一般的に機械式時計に使用されるひげぜんまい１００の模式図である。図１０（ａ）、（ｂ）、（ｃ）は、それぞれ平ひげぜんまい１０１、ブレゲひげぜんまい１０３、及び提灯ひげぜんまい１０５の説明図であり、上図が渦巻の上方から見る模式図であり、下図が渦巻の横方向から見る模式図である。 FIG. 10 is a schematic diagram of a hairspring 100 generally used in a mechanical timepiece. 10 (a), (b), and (c) are explanatory views of the flat hairspring 101, the Breguet hairspring 103, and the lantern hairspring 105, respectively, and the upper diagram is a schematic view seen from above the spiral. The following figure is a schematic view seen from the lateral direction of the spiral.

図１０（ａ）に示すように、平ひげぜんまい１０１は、銅やエリンバー系合金の薄い帯からなり、一平面内に巻き回される渦巻形状を有する。渦巻の外周には外端カーブ１０２が形成され、渦巻の径方向のピッチの距離よりも外側に折り曲げられる。この外端カーブ１０２に平ひげぜんまい１０１を固定するためのひげ持を設置し、内側のひげぜんまいとひげ持が接触しないようにする。 As shown in FIG. 10 (a), the flat hairspring 101 is made of a thin strip of copper or an Elinvar alloy, and has a spiral shape wound in one plane. An outer end curve 102 is formed on the outer periphery of the spiral, and is bent outward from the pitch distance in the radial direction of the spiral. A whisker for fixing the flat hairspring 101 is installed on the outer end curve 102 so that the inner hairspring and the whisker are not in contact with each other.

図１０（ｂ）に示すように、ブレゲひげぜんまい１０３は外端カーブ１０２をひげぜんまい１００の外周よりも内側上方に巻き上げて形成する。外端カーブ１０２は上方に巻き上げられるので、外端カーブ１０２にひげ持を設置してもひげぜんまい１００と接触しない。ブレゲひげぜんまい１０３の外端カーブ１０２はフィリップスの条件を満たすように渦巻の内側に曲げられ、ひげぜんまい１００が伸縮したときに回転中心が偏心しないように形成される。 As shown in FIG. 10B, the Breguet balance spring 103 is formed by winding the outer end curve 102 inward and upward from the outer periphery of the balance spring 100. Since the outer end curve 102 is rolled up, even if a beard is installed on the outer end curve 102, it does not come into contact with the hairspring 100. The outer end curve 102 of the Breguet hairspring 103 is bent inside the spiral so as to satisfy the Phillips condition, and is formed so that the center of rotation does not decenter when the hairspring 100 is expanded or contracted.

図１０（ｃ）に示すように、提灯ひげぜんまい１０５は全体が提灯の形状を有し、てん輪の回転に伴ってひげぜんまいが同心円上で伸縮する。そのため歩度精度が高く高精度の時計に使用される。 As shown in FIG. 10C, the lantern balance spring 105 has a lantern shape as a whole, and the balance spring expands and contracts on a concentric circle as the balance wheel rotates. For this reason, it is used for high-accuracy watches with high accuracy.

特開２００６−２１４８２２号公報JP 2006-214822 A

図１０（ａ）に示す平ひげぜんまい１０１では、最外周のひげぜんまい１００を大きく折り曲げて外端カーブ１０２を形成する。しかし、大きく折り曲げた部分は経時的に変形しやすい。また、図１０（ｂ）に示すブレゲひげぜんまい１０３では、ひげぜんまい１００の外端カーブ１０２をフィリップスの条件を満たすように渦巻の内側上方に巻き上げる。そのため、ひげぜんまい１００を渦巻の上方に大きな応力をかけて曲げる必要があり、外端カーブ１０２を高精度に形成するのが難しい。また、残留応力によって経時的に変形しやすい。ひげぜんまい１００の外端カーブ１０２がフィリップスの条件から外れると、振動周期が変化して歩度精度が低下する、或いは回転触れ角の大きさに応じて振動周期が変化し、等時性が低下する。また、図１０（ｃ）に示す提灯ひげぜんまい１０５は上下方向の厚さが厚くなるので時計が厚くなる。 In the flat hairspring 101 shown in FIG. 10A, the outermost hairspring 100 is largely bent to form the outer end curve 102. However, the greatly bent portion is easily deformed with time. Further, in the Breguet hairspring 103 shown in FIG. 10B, the outer end curve 102 of the hairspring 100 is wound up inside the spiral so as to satisfy the Philips condition. Therefore, it is necessary to bend the mainspring 100 by applying a large stress above the spiral, and it is difficult to form the outer end curve 102 with high accuracy. Moreover, it is easy to deform over time due to residual stress. When the outer end curve 102 of the hairspring 100 deviates from the Philips condition, the vibration period changes and the rate accuracy decreases, or the vibration period changes according to the magnitude of the rotation touch angle, and the isochronism decreases. . Further, the lantern balance spring 105 shown in FIG. 10C is thick in the vertical direction, so that the watch is thick.

本発明は、上記課題に鑑みてなされたものであり、小型で高精度のひげぜんまい及びその製造方法を提供する。 The present invention has been made in view of the above problems, and provides a small and highly accurate hairspring and a method for manufacturing the same.

本発明のひげぜんまいは、線状のばね材が巻き回された渦巻の形状を有し、前記渦巻は、前記渦巻を垂直方向から見る平面視で略円形であり、前記渦巻の中心を通る垂直方向の断面が略Ｗ字形であることとした。 The hairspring of the present invention has a spiral shape in which a linear spring material is wound, and the spiral is substantially circular in a plan view when the spiral is viewed from the vertical direction, and passes through the center of the spiral. The cross section in the direction was substantially W-shaped.

また、前記ばね材は外側の端部から数えて１巻目と２巻目が前記平面視で交差し、前記平面視で交差する交差点において１巻目の前記ばね材と２巻目の前記ばね材とは離間することとした。 In addition, the first spring material and the second spring spring are intersected at the intersection where the first and second windings intersect from each other in the plan view, counting from the outer end. It was decided to be separated from the material.

また、前記ばね材の内周側の端部に接合されるひげ玉を備え、前記ひげ玉は前記ばね材が嵌合する嵌合溝を備え、前記嵌合溝は前記渦巻の垂直方向に対して傾斜することとした。 Further, a whisker is joined to an inner peripheral end of the spring material, the whisker is provided with a fitting groove into which the spring material is fitted, and the fitting groove is perpendicular to the spiral direction. And inclined.

本発明のムーブメントは、上記いずれかに記載のひげぜんまいを備えることとした。 The movement of the present invention is provided with any of the hairsprings described above.

本発明の時計は、上記のひげぜんまいを備えることとした。 The timepiece of the present invention is provided with the above-described hairspring.

本発明のひげぜんまいの製造方法は、ばね材が巻き回される平板状の平ひげぜんまいを形成する平ひげぜんまい形成工程と、前記平ひげぜんまいを渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまいに変形させる変形工程と、前記略Ｗ字形のひげぜんまいを熱処理して癖付けする熱処理工程と、を備えることとした。 The method of manufacturing a hairspring of the present invention includes a flat hairspring forming step of forming a flat spring spring on which a spring material is wound, and a vertical cross section passing through the center of the spiral of the flat hairspring. A deforming step of deforming into a letter-shaped hairspring, and a heat treatment step of heat-treating and brazing the substantially W-shaped hairspring.

また、前記変形工程は、前記平ひげぜんまいを縦断面が略Ｗ字形を有する凸型と縦断面が略Ｗ字形を有する凹型との間に挟んで押圧する工程であり、前記熱処理工程の後に前記凸型と前記凹型を除去して渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまいを取り出す取出し工程を備えることとした。 The deforming step is a step of pressing the flat hairspring between a convex shape having a substantially W-shaped longitudinal section and a concave shape having a substantially W-shaped longitudinal section, and after the heat treatment step, The convex shape and the concave shape are removed, and an extraction step of taking out a hairspring having a substantially W-shaped cross section passing through the center of the spiral is provided.

また、前記変形工程は、上端を揃えた複数の押し当てピンの上部に前記平ひげぜんまいを載置し、前記平ひげぜんまいに縦断面が略Ｗ字形を有する凸型を押し当て変形させる工程であり、前記熱処理工程の後に前記凸型と前記複数の押し当てピンを除去して渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまいを取り出す取出し工程を備えることとした。 The deforming step is a step of placing the flat hairspring on top of a plurality of pressing pins with the upper ends aligned, and pressing and deforming the flat hairspring with a convex shape having a substantially W-shaped longitudinal section. And, after the heat treatment step, a step of removing the balance spring having a substantially W-shaped cross section in the vertical direction passing through the center of the spiral by removing the convex mold and the plurality of pressing pins.

また、前記変形工程は、巻き回されるばね材の間に前記押し当てピンが挿入される工程であることとした。 Further, the deformation step is a step in which the pressing pin is inserted between the wound spring materials.

本発明のひげぜんまいは、線状のばね材が巻き回された渦巻の形状を有し、渦巻は、渦巻を垂直方向から見る平面視で略円形であり、渦巻の中心を通る垂直方向の断面が略Ｗ字形である。これにより、ひげぜんまいの伸縮に伴う偏心を少なくし、ブレゲひげぜんまいと同等の歩度精度及び等時性を確保する。また、ひげぜんまいの外端カーブ領域に渦巻の面方向や渦巻の垂直方向に大きな屈曲部を無くして経時的変形を少なくする。 The hairspring of the present invention has a spiral shape in which a linear spring material is wound. Is substantially W-shaped. Thereby, the eccentricity accompanying the expansion and contraction of the hairspring is reduced, and the rate accuracy and isochronism equivalent to those of the Breguet hairspring are ensured. In addition, a large bent portion is eliminated in the surface direction of the spiral or in the vertical direction of the spiral in the outer end curve region of the hairspring to reduce deformation with time.

本発明の第一実施形態に係るひげぜんまいの説明図である。It is explanatory drawing of the hairspring based on 1st embodiment of this invention. 本発明の第一実施形態に係るひげぜんまいの説明図である。It is explanatory drawing of the hairspring based on 1st embodiment of this invention. 本発明の第一実施形態に係るひげぜんまいの説明図である。It is explanatory drawing of the hairspring based on 1st embodiment of this invention. 本発明の第二実施形態に係るひげぜんまいの側面模式図である。It is a side surface schematic diagram of the hairspring which concerns on 2nd embodiment of this invention. 本発明の第三実施形態に係るひげぜんまいの製造方法の工程図である。It is process drawing of the manufacturing method of the hairspring based on 3rd embodiment of this invention. 本発明の第三実施形態に係るひげぜんまいの製造方法の各工程を説明するための断面模式図である。It is a cross-sectional schematic diagram for demonstrating each process of the manufacturing method of the hairspring which concerns on 3rd embodiment of this invention. 本発明の第四実施形態に係るひげぜんまいの製造方法の説明図である。It is explanatory drawing of the manufacturing method of the hairspring based on 4th embodiment of this invention. 本発明の第五実施形態に係る時計の模式図である。It is a schematic diagram of the timepiece according to the fifth embodiment of the present invention. 従来公知である時計のてんぷの模式図である。It is a schematic diagram of the balance of a timepiece conventionally known. 従来公知の一般的に機械式時計に使用されるひげぜんまいの模式図である。It is a schematic diagram of a hairspring used in a conventionally known general mechanical timepiece.

（第一実施形態）
図１〜図３は、本発明の第一実施形態に係るひげぜんまい１の説明図である。図１はひげぜんまい１の模式的な斜視図であり、図２はひげぜんまい１を渦巻の垂直方向から見る平面模式図であり、図３は渦巻の中心を通る垂直方向の断面模式図である。 (First embodiment)
1-3 is explanatory drawing of the hairspring 1 which concerns on 1st embodiment of this invention. FIG. 1 is a schematic perspective view of the hairspring 1, FIG. 2 is a schematic plan view of the hairspring 1 viewed from the vertical direction of the spiral, and FIG. 3 is a schematic sectional view in the vertical direction passing through the center of the spiral. .

図１に示すように、ひげぜんまい１は、線状のばね材２が巻き回される渦巻の形状を有する。渦巻は、全体として杯形状を有し、渦巻きの垂直方向から見る平面視で略円形であり、渦巻きの中心を通る垂直方向の断面が略Ｗ字形を有する。つまり、渦巻は、内側の端部Ｅ１から外側下方に向けて拡径しながら巻き回され、途中から外側上方に向けて拡径しながら巻き回される。渦巻は、渦巻の中心を通る垂直方向の断面が略Ｍ字形であってもよく、上下を反転すれば略Ｗ字形となる。この場合、渦巻は、内側の端部Ｅ１から外側上方に向けて拡径しながら巻き回され、途中から外側下方に向けて拡径しながら巻き回される。なお、略Ｗ字形とは、実際の文字“Ｗ”のように下部や中央部に先の尖った底部や頂部が存在してもよいが、滑らかな底面の中央に頂部が滑らかな凸部が存在するものであってもよい。また、中央の凸部の高さは外周の高さと同程度であってもよいし、外周の高さよりも高くても、低くてもよい。要するに、渦巻の中心を通る垂直方向の断面が全体としてＷ字形或いはＭ字形であればよい。 As shown in FIG. 1, the hairspring 1 has a spiral shape around which a linear spring material 2 is wound. The spiral has a cup shape as a whole, is substantially circular in a plan view when viewed from the vertical direction of the spiral, and has a substantially W-shaped vertical cross section passing through the center of the spiral. That is, the vortex is wound while expanding the diameter from the inner end E1 toward the lower outer side and wound while expanding the diameter from the middle toward the upper outer side. The spiral may have a substantially M-shaped vertical cross-section passing through the center of the spiral, and is substantially W-shaped if it is turned upside down. In this case, the spiral is wound while increasing in diameter from the inner end E1 toward the upper outer side and wound while increasing in diameter from the middle toward the lower outer side. Note that the substantially W-shape may have a pointed bottom or top at the bottom or center as in the actual letter “W”, but a convex portion with a smooth top at the center of the smooth bottom. It may exist. Further, the height of the central convex portion may be the same as the height of the outer periphery, or may be higher or lower than the height of the outer periphery. In short, the cross section in the vertical direction passing through the center of the spiral may be W-shaped or M-shaped as a whole.

ばね材２は渦巻の垂直方向に幅広い帯からなる。図２に示すように、ばね材２は、外側の端部Ｅ２が渦巻の内側に曲げられ、渦巻を垂直方向から見る平面視で下方のばね材と交差する。ここで、外側の端部Ｅ２から数えて１巻目のばね材２１と２巻目のばね材２２が平面視で交差する交差部Ｋにおいて、１巻目のばね材２１と２巻目のばね材２２とは垂直方向に離間する。つまり、１巻目のばね材２１の下端と２巻目のばね材２２の上端とが離間する。 The spring material 2 consists of a wide band in the vertical direction of the spiral. As shown in FIG. 2, the spring material 2 has an outer end E2 bent to the inside of the spiral and intersects with the lower spring material in a plan view when the spiral is viewed from the vertical direction. Here, at the intersection K where the first spring material 21 and the second spring material 22 intersect in plan view, counting from the outer end E2, the first spring material 21 and the second spring spring. It is separated from the material 22 in the vertical direction. That is, the lower end of the first roll spring material 21 and the upper end of the second roll spring material 22 are separated from each other.

図３を用いて具体的に説明する。ひげぜんまい１は、渦巻の中心を通る垂直方向の断面が略Ｗ字形を有する。図３にはひげぜんまい１に接続される部材が記載される。まず、渦巻の中央である内側の端部Ｅ１にはひげ玉３が接続される。渦巻の上部である外側の端部Ｅ２にはひげ持４が接続される。ひげ玉３の図示しない貫通口にはてん真５が接続される。てん輪６はてん真５の上部に係止される。ひげ持４は、例えば、図示しない緩急体を介してムーブメントに固定される。てん真５はてん輪６とひげぜんまい１の往復回転振動の回転軸となる。てん輪６の往復回転振動はてん真５、ひげ玉３を介してひげぜんまい１に伝達され、ひげぜんまい１は伸縮運動を繰り返す。なお、てん輪６はひげぜんまい１の下部においててん真５に係止してもよい。 This will be specifically described with reference to FIG. The hairspring 1 has a substantially W-shaped vertical cross section passing through the center of the spiral. FIG. 3 shows a member connected to the hairspring 1. First, the whisker 3 is connected to the inner end E1 which is the center of the spiral. A whisker 4 is connected to the outer end E2 which is the upper part of the spiral. A balance stem 5 is connected to a through hole (not shown) of the whistle ball 3. The balance wheel 6 is locked to the upper part of the balance 5. The whiskers 4 are fixed to the movement via a slow and slow body (not shown), for example. The balance stem 5 serves as a rotational axis of the reciprocating rotational vibration between the balance wheel 6 and the hairspring 1. The reciprocating rotational vibration of the balance wheel 6 is transmitted to the hairspring 1 through the balance 5 and the hairball 3, and the hairspring 1 repeats expansion and contraction. The balance wheel 6 may be locked to the balance 5 at the lower part of the hairspring 1.

このように、ひげぜんまい１の断面を略Ｗ字形とすると、提灯ひげぜんまいよりも上下方向の厚さを薄く形成することができる。そのため、腕時計などの小型の時計に使用することができる。また、交差部Ｋにおいて、１巻目のばね材２１と２巻目のばね材２２との間には垂直方向に隙間が存在する。そのため、２巻目のばね材２２の伸縮運動が１巻目のばね材２１によって阻害されることがない。つまり、交差部Ｋにおいてばね材２どうしが接触しないので、ひげぜんまい１の回転軸（てん真５の軸心）から重心が移動し、振動周期が変化するのを防止することができる。 Thus, if the cross section of the hairspring 1 is substantially W-shaped, the thickness in the vertical direction can be made thinner than the lantern spring. Therefore, it can be used for a small timepiece such as a wristwatch. In the intersection K, there is a gap in the vertical direction between the first spring material 21 and the second spring material 22. Therefore, the expansion / contraction motion of the second-roll spring material 22 is not hindered by the first-roll spring material 21. That is, since the spring members 2 are not in contact with each other at the intersection K, it is possible to prevent the center of gravity from moving from the rotation axis of the balance spring 1 (the axis of the spring 5) and changing the vibration cycle.

交差部Ｋの近傍から外側の端部Ｅ２にかけてばね材２が内側に曲げられる領域を外端カーブ領域Ｒとして、この外端カーブ領域Ｒは、ばね材２が渦巻の内側に滑らかに曲げられる。ばね材２の外側の端部Ｅ２は渦巻の中心軸側（図３においてはてん真５側）に寄せられ、外側の端部Ｅ２の下方に空間が確保される。そのため、ブレゲひげぜんまいのようにばね材の端部を上方（渦巻の垂直方向）に持ち上げることなく、ばね材２の外側の端部Ｅ２にひげ持４を取り付けることができる。また、外端カーブ領域Ｒが内側に曲げられているので、ひげぜんまい１をピンセット等で容易に掴むことができる。 A region where the spring material 2 is bent inward from the vicinity of the intersection K to the outer end E2 is defined as an outer end curve region R. In the outer end curve region R, the spring material 2 is smoothly bent inside the spiral. The outer end E2 of the spring material 2 is brought closer to the center axis side of the spiral (the balance 5 side in FIG. 3), and a space is secured below the outer end E2. Therefore, the beard 4 can be attached to the outer end E2 of the spring material 2 without lifting the end of the spring material upward (in the vertical direction of the spiral) like a Breguet hairspring. Moreover, since the outer end curve region R is bent inward, the hairspring 1 can be easily grasped with tweezers or the like.

本実施形態においては、１巻目のばね材２１の外端カーブ領域Ｒのばね材２と２巻目のばね材２２を含む他の領域のばね材２とは、渦巻の垂直方向（てん真５の軸心方向）に対して傾斜角が等しい。従って、渦巻の垂直方向に幅広の帯からなるばね材２を使用する場合でも、外端カーブ領域Ｒのばね材２を帯の幅広方向に大きな応力をかけて曲げる必要がなく、カーブの癖付けが容易となる。更に、外端カーブ領域Ｒの残留応力が低減し、経時的変形の少ないひげぜんまい１を形成することができる。これにより、歩度精度及び等時性に優れたひげぜんまい１を形成することができる。 In the present embodiment, the spring material 2 in the outer curve region R of the first spring material 21 and the spring material 2 in the other region including the second spring material 22 are in the vertical direction of the spiral (spring The inclination angle is equal to the axial direction of 5). Therefore, even when the spring material 2 composed of a wide band in the vertical direction of the spiral is used, it is not necessary to bend the spring material 2 in the outer end curved region R with a large stress in the wide direction of the band. Becomes easy. Furthermore, the residual stress in the outer end curve region R is reduced, and the balance spring 1 with little deformation with time can be formed. Thereby, the hairspring 1 excellent in rate accuracy and isochronism can be formed.

なお、ばね材２として、プラスチック、金属、合金、その他の材料を使用することができる。例えば、合金としてエリンバー、テリンバー、ニバロックス、コエリンバー等を使用すれば、温度変化や姿勢差に対して振動周期が安定する高精度の時計を形成することができる。また、ばね材２は、渦巻の垂直方向に幅広の断面形状が長方形である帯により形成することに代えて、断面形状が円形であってもよいし、楕円形であってもよいし、四角形であってもよい。本実施形態のように、渦巻の垂直方向に幅広の帯とすれば、渦巻や外端カーブ領域Ｒの癖付けが容易となる。 The spring material 2 can be made of plastic, metal, alloy, or other material. For example, if Elinvar, Terimbar, Nivalox, Coelinbar or the like is used as an alloy, a highly accurate timepiece having a stable vibration cycle with respect to temperature changes and attitude differences can be formed. In addition, the spring material 2 may be formed in a circular shape, an elliptical shape, or a rectangular shape, instead of being formed by a band whose cross-sectional shape is rectangular in the vertical direction of the spiral. It may be. If the band is wide in the vertical direction of the spiral as in this embodiment, the spiral and the outer end curve region R can be easily brazed.

（第二実施形態）
図４は、本発明の第二実施形態のひげぜんまい１の説明図である。図４（ａ）はひげぜんまい１の側面模式図であり、図４（ｂ）はひげ玉３の斜視図であり、図４（ｃ）はひげ玉３の断面模式図である。第一実施形態と異なる点は、ひげぜんまい１はひげぜんまい１に接続されるひげ玉３を含む点であり、その他の構成は第一実施形態と同様である。同一の部分又は同一の機能を有する部分には同一の符号を付している。 (Second embodiment)
FIG. 4 is an explanatory diagram of the hairspring 1 according to the second embodiment of the present invention. 4A is a schematic side view of the hairspring 1, FIG. 4B is a perspective view of the whistle ball 3, and FIG. 4C is a schematic cross-sectional view of the whistle ball 3. The difference from the first embodiment is that the hairspring 1 includes a hairball 3 connected to the hairspring 1, and the other configurations are the same as those of the first embodiment. The same portions or portions having the same function are denoted by the same reference numerals.

ひげぜんまい１は、線状のばね材２が巻き回される渦巻きの形状を有する。渦巻は、渦巻を垂直方向から見る平面で略円形であり、渦巻の中心を通る垂直方向の断面が略Ｗ字形である。ばね材２は、外側の端部から数えて１巻目のばね材２１と２巻目のばね材２２が渦巻の垂直方向から見る平面視で交差し、この交差する交差部Ｋにおいて、１巻目のばね材２１と２巻目のばね材２２とは垂直方向に離間する。そして、ひげぜんまい１は、ばね材２の内側の端部Ｅ１に接続されるひげ玉を備える。ひげ玉３は、ばね材２が嵌合する嵌合溝７を備える。嵌合溝７は、その溝方向が渦巻の垂直方向に対して傾斜する。より詳しくは、嵌合溝７の側壁Ｓが渦巻の垂直方向に対して傾斜する。 The hairspring 1 has a spiral shape around which a linear spring material 2 is wound. The spiral is substantially circular in a plane when the spiral is viewed from the vertical direction, and the vertical cross section passing through the center of the spiral is substantially W-shaped. In the spring material 2, the first spring material 21 and the second spring material 22 intersect each other in a plan view as viewed from the vertical direction of the spiral, The spring material 21 of the eye and the spring material 22 of the second roll are separated in the vertical direction. The hairspring 1 includes a whisker ball connected to the inner end E1 of the spring material 2. The whisker ball 3 includes a fitting groove 7 into which the spring material 2 is fitted. The groove direction of the fitting groove 7 is inclined with respect to the vertical direction of the spiral. More specifically, the side wall S of the fitting groove 7 is inclined with respect to the vertical direction of the spiral.

具体的に説明する。ひげ玉３は円筒形を有し、円筒の中央にはてん真５が嵌め込まれる貫通孔８が形成される。ひげ玉３の外側面に嵌合溝７が形成される。ばね材２の内側の端部Ｅ１近傍を内端領域Ｈとして、嵌合溝７の溝方向（嵌合溝７の側壁Ｓの方向と同じ）は、渦巻の垂直方向に対して内端領域Ｈのばね材２と同じ傾斜角αで傾斜する。そのため、ばね材２の内端領域Ｈをひげ玉３に接続する際に、ばね材２を渦巻の垂直方向に折り曲げる必要がない。本実施形態においては、渦巻の垂直方向に幅広の帯状のばね材２を使用しているが、ひげ玉３の嵌合溝７の溝方向とばね材２の長手方向とに同じ傾斜角αを持たせているので、ばね材２とひげ玉３とを極めて容易に接続することができる。また、接続後にばね材２の渦巻形状を変形させることが無いので、ひげぜんまい１の往復回転振動の振動周期の精度や等時性を向上させることができる。 This will be specifically described. The whisker ball 3 has a cylindrical shape, and a through hole 8 into which the balance stem 5 is fitted is formed at the center of the cylinder. A fitting groove 7 is formed on the outer surface of the whistle ball 3. The vicinity of the inner end E1 of the spring material 2 is defined as an inner end region H, and the groove direction of the fitting groove 7 (same as the direction of the side wall S of the fitting groove 7) is the inner end region H with respect to the vertical direction of the spiral. The spring material 2 is inclined at the same inclination angle α. Therefore, when connecting the inner end region H of the spring material 2 to the whistle ball 3, it is not necessary to bend the spring material 2 in the vertical direction of the spiral. In the present embodiment, a wide strip-shaped spring material 2 is used in the vertical direction of the spiral, but the same inclination angle α is set in the groove direction of the fitting groove 7 of the whistle ball 3 and the longitudinal direction of the spring material 2. Since it has, it can connect the spring material 2 and the whistle ball 3 very easily. Further, since the spiral shape of the spring material 2 is not deformed after connection, the accuracy and isochronism of the vibration period of the reciprocating rotational vibration of the mainspring 1 can be improved.

本実施形態では、ひげ玉３とばね材２の接続を、ひげ玉３の表面に嵌合溝７を形成し、この嵌合溝７にばね材２の内端領域Ｈを嵌合させて接続するが、本発明はこの接続方法に限定されない。ひげ玉３に嵌合穴を形成し、この嵌合穴にばね材２の内端領域Ｈを嵌合させて接続してもよい。この場合に、渦巻の垂直方向に対して嵌合穴の中心軸を傾斜角αに傾けて形成すればよい。 In the present embodiment, the connection between the whistle ball 3 and the spring material 2 is made by forming a fitting groove 7 on the surface of the whistle ball 3 and fitting the inner end region H of the spring material 2 into the fitting groove 7. However, the present invention is not limited to this connection method. A fitting hole may be formed in the whistle ball 3, and the inner end region H of the spring material 2 may be fitted and connected to the fitting hole. In this case, the center axis of the fitting hole may be formed at an inclination angle α with respect to the vertical direction of the spiral.

（第三実施形態）
図５及び図６は、本発明の第三実施形態に係るひげぜんまい１の製造方法の説明図である。図５はひげぜんまい１の製造方法の工程図である。図６は各工程を説明するための断面模式図であり、図６（ａ）が凹型１０と凸型１１の間に平ひげぜんまい９を設置した状態を表し、図６（ｂ）が凸型１１を凹型１０に相対的に押圧した状態を表し、図６（ｃ）が略Ｗ字形に癖付けされたひげぜんまい１の断面模式図であり、図６（ｄ）が外端カーブ領域Ｒを形成したひげぜんまい１の断面模式図である。同一の部分又は同一の機能を有する部分には同一の符号を付している。 (Third embodiment)
FIG.5 and FIG.6 is explanatory drawing of the manufacturing method of the hairspring 1 which concerns on 3rd embodiment of this invention. FIG. 5 is a process diagram of a method for manufacturing the hairspring 1. FIG. 6 is a schematic cross-sectional view for explaining each process. FIG. 6A shows a state in which the flat hairspring 9 is installed between the concave mold 10 and the convex mold 11, and FIG. 11 represents a state in which 11 is pressed against the concave mold 10, and FIG. 6C is a schematic cross-sectional view of the hairspring 1 brazed in a substantially W shape, and FIG. 6D illustrates the outer end curve region R. It is a cross-sectional schematic diagram of the formed hairspring 1. The same portions or portions having the same function are denoted by the same reference numerals.

本実施形態のひげぜんまい１の製造方法は、図５に示すように、ばね材２が巻き回される平板状の平ひげぜんまい９を形成する平ひげぜんまい形成工程Ｓ１と、平ひげぜんまい９を渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまいに変形させる変形工程Ｓ２と、ひげぜんまいを熱処理して癖付けする熱処理工程Ｓ３とを備える。更に、型を除去して渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまい１を取り出す取出し工程Ｓ４と、ばね材２の外端の端部Ｅ２を渦巻の内側に曲げる外端カーブ形成工程Ｓ５を備える。図６を参照して具体的に説明する。 As shown in FIG. 5, the method for manufacturing the hairspring 1 of the present embodiment includes a flat hairspring forming step S <b> 1 for forming a flat flat spring 9 around which the spring material 2 is wound, and a flat hairspring 9. A deforming step S2 for deforming into a spring having a substantially W-shaped cross section passing through the center of the spiral, and a heat treatment step S3 for heat-treating and brazing the hairspring. Further, the removal step S4 for removing the balance spring 1 having a substantially W-shaped vertical cross section passing through the center of the spiral by removing the mold, and the outer end curve for bending the end E2 of the outer end of the spring material 2 to the inner side of the spiral A forming step S5 is provided. This will be specifically described with reference to FIG.

まず、平ひげぜんまい形成工程Ｓ１において、渦巻状に巻き回される平板状の平ひげぜんまい９を形成する。平ひげぜんまい９は、帯からなる複数のばね材を巻棒に接続し、巻棒を回転させてばね材を渦巻状に巻き込み、香箱に収納する。ばね材を収納する香箱を加熱してばね材を渦巻状に癖付けする。図６（ａ）は、このように形成した平ひげぜんまい９を凹型１０と凸型１１の間に挟む。凹型１０は、中心を通る垂直方向の断面が略Ｗ字形に窪む。言い換えると、凹型１０の窪みは、全体として杯の内面形状に窪み、杯の内面の中央底部が上方に膨らむ形状を有する。凸型１１は、中心を通る垂直方向の断面が略Ｗ字形に突出する。つまり、凸型１１の突出部は、全体として杯の内面形状に突出し、杯の内面の中央底部が上方に膨らむ形状を有する。 First, in the flat-spring mainspring forming step S1, a flat-plate flat-hairspring 9 that is spirally wound is formed. The flat hairspring 9 connects a plurality of spring materials made of a belt to a winding rod, rotates the winding rod to wind the spring material in a spiral shape, and stores it in a barrel. The barrel that houses the spring material is heated to braze the spring material in a spiral shape. In FIG. 6A, the flat hairspring 9 formed in this way is sandwiched between the concave mold 10 and the convex mold 11. The concave mold 10 is recessed in a substantially W-shaped cross section in the vertical direction passing through the center. In other words, the recess of the concave mold 10 has a shape that is generally recessed into the shape of the inner surface of the cup, and the center bottom of the inner surface of the cup swells upward. The convex mold 11 projects in a substantially W-shaped cross section in the vertical direction passing through the center. That is, the protruding portion of the convex mold 11 protrudes into the shape of the inner surface of the cup as a whole, and the center bottom of the inner surface of the cup swells upward.

更に、凹型１０及び凸型１１は、ばね材２を変形したときに、ばね材２の外側の端部Ｅ２から数えて１巻目と２巻目が渦巻きを垂直方向において離間する形状に形成する。具体的には、癖付けするばね材２の垂直方向の高さをｈ、１巻目と２巻目のばね材２の水平方向の距離をｄとして、凹型１０及び凸型１１の上部傾斜面（ばね材２の１巻目と２巻目を癖付けする領域の傾斜面）の垂直方向に対する傾斜角θを、θ＜ｔａｎ^-1（ｄ／ｈ）とする。 Further, when the spring material 2 is deformed, the concave mold 10 and the convex mold 11 are formed in a shape in which the first and second rolls are separated from each other in the vertical direction as counted from the outer end E2 of the spring material 2. . Specifically, the height of the vertical direction of the spring material 2 to be brazed is h, and the horizontal distance between the first and second spring material 2 is d, and the upper inclined surfaces of the concave mold 10 and the convex mold 11 The inclination angle θ with respect to the vertical direction of the inclined surface of the region where the first and second rolls of the spring material 2 are brazed is defined as θ <tan ⁻¹ (d / h).

次に、変形工程Ｓ２において、図６（ｂ）に示すように、凸型１１を凹型１０に相対的に押圧して、平ひげぜんまい９を、渦巻の中心を通る垂直方向の断面が略Ｗ字形となるように変形させる。次に、熱処理工程Ｓ３において、凹型１０及び凸型１１とともに平ひげぜんまい９を熱処理する。これにより、平ひげぜんまい９は渦巻の中心を通る垂直方向の断面が略Ｗ字形に癖付けされる。次に、取出し工程Ｓ４において、図６（ｃ）に示すように、凹型１０及び凸型１１から渦巻の垂直方向の断面が略Ｗ字形に癖付けされたひげぜんまい１を取り出す。次に、外端カーブ形成工程Ｓ５において、図６（ｄ）に示すように、ばね材２の外側の端部Ｅ２を渦巻の内側に滑らかに曲げる。この際に、ばね材２は外側の端部Ｅ２から数えて１巻目と２巻目が渦巻きを垂直方向から見る平面視で交差し、その交差点において１巻目のばね材２と２巻目のばね材２とは離間し、外端カーブ領域Ｒは渦巻の上方に曲げる必要が無い。そのため、渦巻の垂直方向に幅広のばね材２を用いても外端カーブ領域Ｒを極めて容易かつ高精度に形成することができる。 Next, in the deformation step S2, as shown in FIG. 6 (b), the convex die 11 is pressed against the concave die 10 so that the flat hairspring 9 has a substantially vertical cross section passing through the center of the spiral. Transform to a letter shape. Next, in the heat treatment step S <b> 3, the flat hairspring 9 is heat treated together with the concave mold 10 and the convex mold 11. Accordingly, the flat hairspring 9 is brazed in a substantially W-shaped cross section in the vertical direction passing through the center of the spiral. Next, in the extracting step S4, as shown in FIG. 6C, the hairspring 1 in which the cross section in the vertical direction of the spiral is brazed in a substantially W shape is extracted from the concave mold 10 and the convex mold 11. Next, in the outer end curve forming step S5, as shown in FIG. 6D, the outer end E2 of the spring material 2 is smoothly bent inside the spiral. At this time, the spring material 2 is counted from the outer end E2, and the first and second rolls intersect in a plan view when the spiral is viewed from the vertical direction, and the first spring material 2 and the second roll are intersected at the intersection. The outer end curve region R need not be bent upward from the spiral. Therefore, the outer end curve region R can be formed very easily and with high accuracy even when the spring material 2 that is wide in the vertical direction of the spiral is used.

なお、ひげぜんまい１のばね材２は、渦巻の垂直方向に幅広の帯状のばね材２に限定されず、断面形状が円形や楕円形、四角形等であってもよい。 The spring material 2 of the hairspring 1 is not limited to the strip-shaped spring material 2 that is wide in the vertical direction of the spiral, and the cross-sectional shape may be a circle, an ellipse, a quadrangle, or the like.

（第四実施形態）
図７は、本発明の第四実施形態に係るひげぜんまい１の製造方法の説明図である。図７（ａ）が凸型１１と押し当てピン１２の間に平ひげぜんまい９を設置した状態を表し、図７（ｂ）が凸型１１を押し当てピン１２に相対的に押圧した状態を表し、図７（ｃ）が渦巻きの中心を通る垂直方向の断面が略Ｗ字形に癖付けされたひげぜんまい１の断面模式図であり、図７（ｄ）が外端カーブ領域Ｒを形成したひげぜんまい１の断面模式図である。本実施形態のひげぜんまい１の製造工程は図５に示す第三実施形態と同じである。同一の部分又は同一の機能を有する部分には同一の符号を付している。 (Fourth embodiment)
FIG. 7 is an explanatory diagram of a method for manufacturing the hairspring 1 according to the fourth embodiment of the present invention. FIG. 7A shows a state in which the flat hairspring 9 is installed between the convex mold 11 and the pressing pin 12, and FIG. 7B shows a state in which the convex mold 11 is relatively pressed against the pressing pin 12. 7C is a schematic cross-sectional view of the hairspring 1 in which a vertical cross-section passing through the center of the spiral is braided in a substantially W shape, and FIG. 7D forms an outer end curve region R. 1 is a schematic cross-sectional view of a hairspring 1. The manufacturing process of the hairspring 1 of this embodiment is the same as that of the third embodiment shown in FIG. The same portions or portions having the same function are denoted by the same reference numerals.

まず、平ひげぜんまい形成工程Ｓ１において、渦巻状に巻き回される平板状の平ひげぜんまい９を形成する。平ひげぜんまい９の形成方法は第三実施形態と同様である。図７（ａ）は、このように形成した平ひげぜんまい９を、複数の押し当てピン１２と中心を通る垂直方向の断面が略Ｗ字形に突出する凸型１１との間に挟む。ここで、複数の押し当てピン１２は、枠１３の内側に束ねられ、上端面を揃えて枠１３に束縛される。各押し当てピン１２は上下方向に独立して移動可能に束縛される。凸型１１、枠１３及び押し当てピン１２は、ばね材２の熱処理温度に応じて金属やセラミックスからなる材料を使用することができる。 First, in the flat-spring mainspring forming step S1, a flat-plate flat-hairspring 9 that is spirally wound is formed. The method for forming the flat hairspring 9 is the same as in the third embodiment. 7A, the flat hairspring 9 formed in this way is sandwiched between a plurality of pressing pins 12 and a convex mold 11 whose vertical cross section passing through the center protrudes in a substantially W shape. Here, the plurality of pressing pins 12 are bundled inside the frame 13 and are bound to the frame 13 with their upper end surfaces aligned. Each pressing pin 12 is constrained to be movable independently in the vertical direction. For the convex mold 11, the frame 13, and the pressing pin 12, a material made of metal or ceramics can be used according to the heat treatment temperature of the spring material 2.

なお、凸型１１は、ばね材２を変形したときに、ばね材２の外側の端部Ｅ２から数えて１巻目と２巻目が渦巻きを垂直方向において離間する形状に形成する。具体的には、癖付けするばね材２の垂直方向の高さをｈ、１巻目と２巻目のばね材２の水平方向の距離をｄとして、凸型１１の上部傾斜面（ばね材２の１巻目と２巻目を癖付けする領域の傾斜面）の垂直方向に対する傾斜角θを、θ＜ｔａｎ^-1（ｄ／ｈ）とする。 The convex mold 11 is formed such that when the spring material 2 is deformed, the first and second rolls are separated from each other in the vertical direction as counted from the outer end E2 of the spring material 2. Specifically, the vertical slope of the spring material 2 to be brazed is h, and the horizontal distance between the first and second spring materials 2 is d. The inclination angle θ with respect to the vertical direction of the inclined surface of the first and second rolls of 2 is θ <tan ⁻¹ (d / h).

次に、変形工程Ｓ２において、図７（ｂ）に示すように、凸型１１と上端を揃えた複数の押し当てピン１２との間に平ひげぜんまい９を挟んで凸型１１を複数の押し当てピン１２に相対的に押圧する。これにより、平ひげぜんまい９は凸型１１の突出する略Ｗ字形に変形され、巻き回されるばね材２の間に押し当てピン１２が挿入される。そのため、例えば渦巻の垂直方向に幅広の帯からなるばね材２を変形させる場合でも、ばね材２とばね材２の間隙に押し当てピン１２が挿入され、ばね材２が水平方向に倒れて渦巻形状が崩れてしまうのを防止することができる。 Next, in the deformation step S2, as shown in FIG. 7 (b), the convex mold 11 is pushed a plurality of times by sandwiching the flat hairspring 9 between the convex mold 11 and the plurality of pressing pins 12 having the upper ends aligned. It presses relatively to the contact pin 12. Thereby, the flat hairspring 9 is deformed into a substantially W-shape from which the convex 11 protrudes, and the pressing pin 12 is inserted between the spring material 2 to be wound. Therefore, for example, even when the spring material 2 composed of a wide band in the vertical direction of the spiral is deformed, the pressing pin 12 is inserted into the gap between the spring material 2 and the spring material 2, and the spring material 2 falls down in the horizontal direction and spirals. It is possible to prevent the shape from collapsing.

次に、熱処理工程Ｓ３において、凸型１１と押し当てピン１２とともに渦巻の中心を通る垂直方向の断面が略Ｗ字形に変形された平ひげぜんまい９を熱処理する。これにより、平ひげぜんまい９は略Ｗ字形に癖付けされる。次に、図７（ｃ）に示すように、凸型１１と複数の押し当てピン１２を除去して略Ｗ字形のひげぜんまい１を取り出す。次に、図７（ｄ）に示すように、ばね材２の外側の端部Ｅ２を渦巻の内側に滑らかに曲げる。この際に、ばね材２は外側の端部Ｅ２から数えて１巻目と２巻目が渦巻きを垂直方向から見る平面視で交差し、その交差点において１巻目のばね材２と２巻目のばね材２とは離間し、外端カーブ領域Ｒは渦巻の上方に曲げる必要が無い。そのため、渦巻の垂直方向に幅広のばね材２を用いても外端カーブ領域Ｒを極めて容易かつ高精度に形成することができる。 Next, in the heat treatment step S3, the flat hairspring 9 in which the vertical cross section passing through the center of the spiral together with the convex mold 11 and the pressing pin 12 is deformed into a substantially W shape is heat treated. Accordingly, the flat hairspring 9 is brazed into a substantially W shape. Next, as shown in FIG. 7C, the convex mold 11 and the plurality of pressing pins 12 are removed, and the substantially W-shaped hairspring 1 is taken out. Next, as shown in FIG. 7 (d), the outer end E2 of the spring member 2 is smoothly bent inside the spiral. At this time, the spring material 2 is counted from the outer end E2, and the first and second rolls intersect in a plan view when the spiral is viewed from the vertical direction, and the first spring material 2 and the second roll are intersected at the intersection. The outer end curve region R need not be bent upward from the spiral. Therefore, the outer end curve region R can be formed very easily and with high accuracy even when the spring material 2 that is wide in the vertical direction of the spiral is used.

（第五実施形態）
図８は、本発明の第五実施形態に係るひげぜんまい１を備えるムーブメントを備える時計の模式図である。同一の部分又は同一の機能を有する部分には同一の符号を付している。 (Fifth embodiment)
FIG. 8 is a schematic view of a timepiece including a movement including the hairspring 1 according to the fifth embodiment of the present invention. The same portions or portions having the same function are denoted by the same reference numerals.

時計１５は、ぜんまい２３を収納する香箱１６と、ぜんまい２３に蓄積される動力を伝達する輪列１７と、輪列１７の回転を規制する脱進部１８などから構成される。なお、文字盤やぜんまいの巻機構等の他の構成は省略する。輪列１７は、香箱１６に取り付けられる歯車１７ａ、二番歯車１７ｂ、二番歯車１７ｂに接続され、歯車１７ａに係合する二番カナ１７ｃ、三番歯車１７ｄ、三番歯車１７ｄに接続され、二番歯車１７ｂと係合する三番カナ１７ｅ、四番歯車１７ｆ、四番歯車１７ｆに接続され、三番歯車１７ｄと係合する四番カナ１７ｇなどを備える不図示のムーブメントが組み込まれて構成される。 The timepiece 15 includes a barrel 16 that houses the mainspring 23, a train wheel 17 that transmits power accumulated in the mainspring 23, and an escapement unit 18 that restricts rotation of the train wheel 17. Other configurations such as a dial and a mainspring winding mechanism are omitted. The wheel train 17 is connected to a gear 17a, a second gear 17b, and a second gear 17b that are attached to the barrel 16, and is connected to a second pinion 17c, a third gear 17d, and a third gear 17d that engage with the gear 17a. A movement (not shown) including a third pinion 17e, a fourth gear 17f, a fourth gear 17f, and a fourth pinion 17g that engages with the third gear 17d and the like is incorporated. Is done.

なお、ムーブメントの一例としては、時計１５からいわゆる外装部分（ケース、時針（不図示）等）を除いた部分であり、動力源の上述したぜんまい２３や、ぜんまい２３を収納する香箱１６、針を動かす輪列１７等、歯車の回転速度を制御するアンクル脱進器（調速・脱進機構）、又は手巻機構（不図示）等を含んで構成されており、単体で流通可能なものである。 An example of the movement is a portion obtained by removing a so-called exterior portion (case, hour hand (not shown), etc.) from the watch 15, and the above-described mainspring 23 of the power source, the barrel 16 for storing the mainspring 23, It is configured to include a moving wheel train 17 and the like, an ankle escapement (regulator / escape mechanism) that controls the rotational speed of the gear, or a manual winding mechanism (not shown). is there.

脱進部１８は、輪列１７から動力を受けるガンギ車２０、ガンギ車２０の回転を規制するアンクル２４、アンクル２４の振動周期を規制するてんぷ１９などから構成される。てんぷ１９は、上記第一実施形態から第五実施形態において説明した渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまい１と、ひげぜんまい１の図示しない内側の端部Ｅ１に接続するひげ玉と、図示しない外側の端部Ｅ２に接続するひげ持と、ひげ玉に接続し、ひげぜんまい１により往復回転運動の回転軸となるてん真５と、てん真５に接続し、往復回転振動を行うてん輪６を備える。 The escapement unit 18 includes an escape wheel 20 that receives power from the wheel train 17, an ankle 24 that restricts the rotation of the escape wheel 20, and a balance 19 that restricts the vibration period of the ankle 24. The balance with hairspring 19 is connected to the hairspring 1 whose cross section in the vertical direction passing through the center of the spiral described in the first to fifth embodiments is substantially W-shaped, and the inner end E1 (not shown) of the hairspring 1. A whisker ball, a whisker that is connected to an outer end E2 (not shown), a whistle ball that is connected to the whistle ball, and which is connected to the balance spring 5 and the balance spring 5 as a rotation axis of the reciprocating rotational motion, A balance wheel 6 that vibrates is provided.

このように、てんぷ１９に渦巻の中心を通る垂直方向の断面が略Ｗ字形のひげぜんまい１を用いることにより、時計の厚さを薄く形成することができると共に、高精度の時刻を表示する時計を構成することができる。 Thus, by using the balance spring 1 having a substantially W-shaped vertical cross section passing through the center of the spiral in the balance 19, the timepiece can be made thin and the timepiece displaying a highly accurate time. Can be configured.

１ひげぜんまい
２ばね材、２１１巻目のばね材、２２２巻目のばね材
３ひげ玉
４ひげ持
５てん真
６てん輪
７嵌合溝
８貫通孔
９平ひげぜんまい
１０凹型、１１凸型
１２押し当てピン
１３枠
１５時計、１７輪列、１８脱進部、１９てんぷ
Ｅ１内側の端部、Ｅ２外側の端部
Ｋ交差部
Ｒ外端カーブ領域
Ｈ内端領域 DESCRIPTION OF SYMBOLS 1 Balance spring 2 Spring material, 21 1st spring material, 22 2nd spring material 3 Whistle ball 4 Whistle 5 Spring stem 6 Balance wheel 7 Fitting groove 8 Through-hole 9 Flat hairspring 10 Concave type, 11 Convex Mold 12 Pushing pin 13 Frame 15 Timepiece, 17 Wheel train, 18 Escapement part, 19 End of balance E1 End of E2 End of outer K K Intersection R Outer end curve area H Inner end area

Claims

It has the shape of a spiral wound with a linear spring material,
The spiral has a substantially circular shape in a plan view when the spiral is viewed from the vertical direction, and a cross-section in the vertical direction passing through the center of the spiral is substantially W-shaped.

The spring material, counting from the outer end, the first and second rolls intersect in the plan view,
The hairspring according to claim 1, wherein the spring material of the first volume and the spring material of the second volume are separated from each other at an intersection that intersects in plan view.

Comprising a whisker that is joined to the inner circumferential end of the spring material;
The hairspring according to claim 1 or 2, wherein the whisker is provided with a fitting groove into which the spring material is fitted, and the fitting groove is inclined with respect to a vertical direction of the spiral.

A movement comprising the hairspring according to any one of claims 1 to 3.

A timepiece comprising the hairspring according to claim 1.

A flat-spring mainspring forming process for forming a flat-plate flat-spring mainspring around which a spring material is wound;
A deformation step of deforming the flat hairspring into a hairspring having a substantially W-shaped vertical cross section passing through the center of the spiral;
A heat treatment step of heat-treating and brazing the substantially W-shaped hairspring.

The deformation step is a step of pressing the flat hairspring between a convex shape having a substantially W-shaped longitudinal section and a concave shape having a substantially W-shaped longitudinal section,
The method of manufacturing a hairspring according to claim 6, further comprising a step of removing the convex spring and the concave mold after the heat treatment step and taking out a hairspring having a substantially W-shaped cross section passing through the center of the spiral.

The deformation step is a step of placing the flat hairspring on top of a plurality of pressing pins whose upper ends are aligned, and pressing and deforming the flat hairspring with a convex shape having a substantially W-shaped longitudinal section,
7. The hairspring of claim 6, further comprising a step of removing the spring having a substantially W-shaped cross section in a vertical direction passing through the center of the spiral by removing the convex mold and the plurality of pressing pins after the heat treatment step. Production method.

The method of manufacturing a hairspring according to claim 8, wherein the deforming step is a step in which the pressing pin is inserted between a wound spring material.