JP2018128444A - Machine component, mechanism module, movement, and watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine component excellent in performance to hold lubricating oil, a mechanism module, a movement, and a watch.SOLUTION: A machine component 10 comprises: a first component 1 that has a first surface area 7a; a second component 2 that has a second surface area 4a in which the first surface area 7a can be slid; and oil holding films 11, 12 that are formed in at least one of the first surface area 7a and second surface area 4a and have a higher lipophilicity than that of the area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a machine part, a mechanism module, a movement, and a timepiece.

  For example, in a mechanical part used in a watch or the like, it is required to retain lubricating oil at a sliding portion in order to reduce friction caused by sliding during rotation. Patent Document 1 discloses a technique for retaining lubricating oil in the region by forming an oil repellent film outside the region carrying oil or the like.

JP 2001-288552 A

  In a small mechanical part such as a watch part, it is difficult to form an oil-repellent film only in a specific region, so that it is not easy to apply the above technique. Accordingly, surface treatment is performed on the entire part with a fluorine-based treatment agent, and lubricating oil is held at the lubrication site by surface tension on the treated surface.

  However, the mechanical parts cannot be said to have sufficient performance for retaining lubricating oil. For this reason, there is a possibility that mechanical parts may be worn due to lack of lubricating oil.

  An object of one embodiment of the present invention is to provide a mechanical part, a mechanism module, a movement, and a timepiece that are excellent in performance of retaining lubricating oil.

One aspect of the present invention includes a first part having a first surface region, a second part having a second surface region in which the first surface region is slidable, the first surface region, and the second surface. Provided is a machine component including an oil retaining film formed in at least one of the regions and having higher lipophilicity than the region.
According to this configuration, the lubricating oil is unlikely to flow out from between the first part and the second part. Therefore, since the state where the lubricating oil is present between the first component and the second component is maintained, deterioration due to wear or the like of the first component and the second component is suppressed, and stable operation can be performed over a long period of time.

In the mechanical component, it is preferable that an oil repellent film having lower lipophilicity than the region is formed in a region adjacent to the oil retaining film of at least one of the first component and the second component.
According to this configuration, the lubricating oil is unlikely to flow out from the surface of the oil retaining film. Therefore, the oil retaining performance can be further enhanced.

（Ｍ₁はＳｉ、Ｔｉ、Ｚｒのうちいずれか１つである。Ｒは炭化水素基である。Ｙ₁、Ｙ₂は炭化水素基、水酸基、または、加水分解等により水酸基を生成する官能基である。Ｚ₁は、極性基である。）
この構成によれば、前記保油膜に、高い保油性能を与えることができる。 The oil retaining film preferably contains a compound represented by the following formula (1).

(M ₁ is any _one of Si, Ti, and Zr. R is a hydrocarbon group. Y ₁ and Y ₂ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. Z ₁ is a polar group.)
According to this configuration, high oil retention performance can be imparted to the oil retention film.

（Ｍ₂はＳｉ、Ｔｉ、Ｚｒのうちいずれか１つである。Ｒｆはフッ素含有基である。Ｙ₃、Ｙ₄は炭化水素基、水酸基、または、加水分解等により水酸基を生成する官能基である。Ｚ₂は、極性基である。）
この構成によれば、前記撥油膜の撥油性能を高めることができる。 The oil repellent film preferably contains a compound represented by the following formula (2).

(M ₂ is one of Si, Ti, and Zr. Rf is a fluorine-containing group. Y ₃ and Y ₄ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. Z ₂ is a polar group.)
According to this configuration, the oil repellency of the oil repellent film can be improved.

It is preferable that the first component is a shaft body that is rotatable about an axis, and the second component is a bearing that rotatably supports the shaft body.
According to this configuration, the oil retaining film makes it easy to maintain a state where there is lubricating oil between the first component and the second component, so that the operation of the mechanical component can be stabilized for a longer period.

The mechanical part may be formed with a holding portion capable of holding lubricating oil in at least one of the first surface region and the second surface region.
According to this configuration, even when the oil retaining film in the surface region is worn by sliding, the lubricating oil is retained, and stable operation can be performed over a long period of time.

The holding part is preferably a concave part formed in the surface region.
According to this configuration, even when the oil retaining film in the surface region is worn by sliding, the oil retaining film in the holding portion is hardly worn. Therefore, the mechanical component retains lubricating oil and can operate stably over a long period of time.

One aspect of the present invention provides a mechanism module including the mechanical component.
According to this configuration, since the mechanical component is provided, stable operation can be performed over a long period of time, and reliability can be improved.

One aspect of the present invention provides a movement including the mechanical component.
According to this configuration, since the mechanical component is provided, stable operation can be performed over a long period of time, and reliability can be improved.

One embodiment of the present invention provides a timepiece including the movement.
According to this configuration, since the mechanical component is provided, stable operation can be performed over a long period of time, and reliability can be improved.

  According to one embodiment of the present invention, high oil retention performance is exhibited with respect to lubricating oil.

It is sectional drawing which shows one form of the machine component of 1st Embodiment which concerns on this invention. It is sectional drawing to which some mechanical components shown in FIG. 1 were expanded. It is sectional drawing which shows the other form of the machine component shown in FIG. It is sectional drawing which shows the further another form of the machine component shown in FIG. It is sectional drawing which shows one form of the machine component of 2nd Embodiment which concerns on this invention. It is sectional drawing which shows the other form of the machine component shown in FIG. It is sectional drawing which shows the further another form of the machine component shown in FIG. It is sectional drawing which shows the machine component of 3rd Embodiment which concerns on this invention. It is sectional drawing which shows the machine component of 4th Embodiment which concerns on this invention. It is a side view which shows the machine component of 5th Embodiment which concerns on this invention. It is a side view showing a machine part in a state before forming an oil retaining film and an oil repellent film. It is a side view which shows the machine component in which the oil retaining film was formed. It is a top view of the movement front side which can use the mechanical component of embodiment. It is a top view which shows the 1st component of the machine component of 6th Embodiment which concerns on this invention. It is a top view which shows the 2nd component of the machine component of 6th Embodiment. It is the perspective view and sectional drawing which show some mechanical components of 7th Embodiment which concerns on this invention. It is sectional drawing which shows a part of movement using the mechanical component of 8th Embodiment which concerns on this invention. It is the schematic which shows the 1st modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 2nd modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 3rd modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 4th modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 5th modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 6th modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 7th modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 8th modification of the shaft body of the machine component shown in FIG. It is the schematic which shows the 9th modification of the shaft body of the machine component shown in FIG. It is a block diagram which shows the 1st modification of the escape wheel shown in FIG. It is a block diagram which shows the 2nd modification of the escape wheel shown in FIG. It is a schematic diagram which shows the 1st example of the whole shape of a recessed part. It is a schematic diagram which shows the 2nd example of the whole shape of a recessed part. It is a schematic diagram which shows the 3rd example of the whole shape of a recessed part. It is a schematic diagram which shows the 4th example of the whole shape of a recessed part. It is a schematic diagram which shows the 5th example of the whole shape of a recessed part. It is a schematic diagram which shows the 6th example of the whole shape of a recessed part. It is a block diagram which shows the 1st modification of the claw stone shown in FIG. It is a block diagram which shows the 2nd modification of the claw stone shown in FIG.

Embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
A timepiece component 10 (mechanical component) according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view showing one embodiment of a timepiece component 10. FIG. 2 is an enlarged cross-sectional view of a part of the timepiece component 10. FIG. 2 is an enlarged view of a portion surrounded by a circle in FIG. FIG. 3 is a cross-sectional view showing another embodiment of the timepiece component 10. FIG. 4 is a cross-sectional view showing still another form of the timepiece component 10. In addition, planar view means seeing in parallel with the central axis of a shaft body.

(Machine parts)
As shown in FIGS. 1 and 2, the timepiece component 10 includes a shaft body 1 (first component), a bearing 2 (second component), and first to third oil retaining films 11 to 13. .
The shaft body 1 is formed in a cylindrical shape. The distal end portion of the shaft body 1 is referred to as a side portion 3. A portion of the ridge portion 3 that is inserted into the through hole 4 of the hole stone 5 is referred to as an insertion portion 7. The outer peripheral surface 7 a (first surface region) of the insertion portion 7 is a region extending over the entire circumference of the insertion portion 7. C <b> 1 is the central axis line of the relief portion 3. The shaft body 1 is, for example, a shaft portion of a rotating body such as a barrel wheel, a second wheel, a third wheel, a fourth wheel, a escape wheel, an ankle, a balance, a abacus ball portion, and a slip mechanism.

The bearing 2 includes a stone 5 having a through hole 4 and a stone 6. The bearing 2 is, for example, an earthquake resistant bearing.
The hole stone 5 is formed of, for example, ruby. The hole stone 5 has, for example, a circular shape in plan view.
The through hole 4 is formed through the hole stone 5 in the thickness direction. The through-hole 4 has a circular shape in a plan view, for example. The inner diameter of the through-hole 4 is determined so that the relief portion 3 can be inserted. For example, the inner diameter of the through hole 4 is larger than the outer diameter of the relief portion 3. An inner peripheral surface 4 a (second surface region) of the through hole 4 is a region extending over the entire circumference of the through hole 4. The inner peripheral surface 4 a (second surface region) of the through hole 4 faces the outer peripheral surface 7 a (first surface region) of the insertion portion 7.

The receiving stone 6 is made of, for example, ruby. The stone 6 is, for example, circular in plan view. The front end surface 3a of the relief portion 3 is disposed opposite to the facing surface 6a (the surface facing the hole stone 5) of the receiving stone 6. The area | region which faces the internal space 4b of the through-hole 4 among the opposing surfaces 6a is called facing area 6b. The facing region 6b has, for example, a circular shape that matches the through hole 4 in plan view. The facing region 6b may be able to contact the tip surface 3a of the ridge portion 3.
The bearing 2 supports the shaft body 1 so as to be rotatable around the central axis C1.

(Oil retention film)
The first oil retaining film 11 is formed on the distal end surface 3 a of the relief portion 3 and the outer peripheral surface 7 a of the insertion portion 7. The first oil retaining film 11 has higher lipophilicity than the formation surface (the tip surface 3a and the outer peripheral surface 7a). The second oil retaining film 12 is formed on the inner peripheral surface 4 a of the through hole 4 of the hole stone 5. The second oil retaining film 12 has higher lipophilicity than the surface to be formed (inner peripheral surface 4a).
The third oil retaining film 13 is formed in the facing area 6 b of the stone 6. The third oil retaining film 13 has higher lipophilicity than the surface to be formed (facing region 6b).

Examples of the lipophilic index include a contact angle with oil. As for the contact angle, for example, about 2 μl of oleic acid is dropped on the surface of the object to be measured, and 10 seconds after the dropping, the angle of the liquid droplet with respect to the surface of the object to be measured is measured by a contact angle meter (CA-X200, manufactured by Kyowa Interface Science). ) To measure at room temperature (about 25 ° C.). The contact angle may be measured using lubricated lubricating oil 8 (for example, poly α-olefin (PAO) or the like) instead of oleic acid. A method based on JIS R3257 may be applied to the measurement of the contact angle.
When the contact angle on the surfaces of the oil retaining films 11 to 13 is smaller than the contact angle on the surface to be formed, it can be said that the oil retaining films 11 to 13 are more lipophilic than the surface to be formed. The oil retaining films 11 to 13 are made of a material having a surface energy larger than that of the constituent material of the surface to be formed, for example.

  The oil retaining films 11 to 13 contain, for example, a compound represented by the following formula (3).

（Ｍ₁はＳｉ、Ｔｉ、Ｚｒのうちいずれか１つである。Ｒは炭化水素基である。Ｙ₁、Ｙ₂は炭化水素基、水酸基、または、加水分解等により水酸基を生成する官能基である。Ｚ₁は、極性基である。）

(M ₁ is any _one of Si, Ti, and Zr. R is a hydrocarbon group. Y ₁ and Y ₂ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. Z ₁ is a polar group.)

Examples of the hydrocarbon group include an alkyl group and an aryl group. The hydrocarbon group is preferably an alkyl group. The alkyl group is represented by C _n H _{2n + 1} (n: natural number). n preferably satisfies “6 ≦ n ≦ 10”. When n is 6 or more, oil retention can be improved. When n is 10 or less, deterioration of the oil retaining film quality due to steric hindrance can be avoided. When n is 10 or less, the time required for the polymerization reaction can be shortened.
The “functional group capable of generating a hydroxyl group by hydrolysis or the like” is, for example, an alkoxy group, an aminoxy group, a ketoxime group, an acetoxy group, etc., and one or more of these can be used. Examples of the alkoxy group include a methoxy group, an ethoxy group, and a propoxy group, and one or more of these can be used.
The polar group is a functional group having polarity. Examples of the polar group include a hydroxyl group, a carboxy group, a sulfo group, an amino group, a phosphoric acid group, a phosphino group, a silanol group, an epoxy group, an isocyanate group, a cyano group, a vinyl group, and a thiol group. Or two or more can be used.

In the compound represented by the formula (3), the functional group represented by Z ₁ , Y ₁ and Y ₂ may be in a form in which a part of the constituent elements is missing due to bonding. For example, the hydroxyl group (—OH) as Z ₁ may be in the form of “—O—” by bonding to the surface to be formed by dehydration condensation. The hydroxyl group (—OH) as Y ₁ and Y ₂ may be in the form of “—O—” by bonding to other Y ₁ or Y ₂ by dehydration condensation. Similarly, a carboxy group (—COOH) may be in the form “—COO—” by a bond.
The content of the compound represented by the formula (3) in the oil retaining films 11 to 13 is, for example, 50% by mass or more.

  In the compound represented by the formula (3), for example, a material in which a polar group forms a surface to be formed (tip surface 3a, outer peripheral surface 7a, inner peripheral surface 4a, and facing region 6b) by dehydration condensation, hydrogen bonding, or the like (for example, It binds or adsorbs to an inorganic material such as a metal. The compound represented by the formula (3) can impart high oil retaining performance to the oil retaining films 11 to 13.

  As a compound shown in Formula (3), the compound of Formula (4) shown next can be illustrated, for example.

  The compound represented by the formula (3) can be obtained, for example, by hydrolyzing the compound represented by the following formula (5).

（Ｍ₁はＳｉ、Ｔｉ、Ｚｒのうちいずれか１つである。Ｒは炭化水素基である。Ｙ₁、Ｙ₂は炭化水素基、水酸基、または、加水分解等により水酸基を生成する官能基である。Ｘ₁は、加水分解等により水酸基を生成する官能基である。）

(M ₁ is any _one of Si, Ti, and Zr. R is a hydrocarbon group. Y ₁ and Y ₂ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. X ₁ is a functional group that generates a hydroxyl group by hydrolysis or the like.)

  The “functional group capable of generating a hydroxyl group by hydrolysis or the like” is, for example, an alkoxy group, an aminoxy group, a ketoxime group, an acetoxy group, etc., and one or more of these can be used. Examples of the alkoxy group include a methoxy group, an ethoxy group, and a propoxy group, and one or more of these can be used. Examples of the compound represented by the formula (5) include octyltriethoxysilane (for example, n-octyltriethoxysilane) represented by the formula (6).

(Formation of oil retaining film)
For the formation of the oil retaining films 11 to 13, for example, an oil retaining agent containing an oil retaining agent containing a compound of the formula (3) and a solvent is used. An additive (for example, a curing catalyst such as dibutyltin diurarate) may be added to the oil retaining agent. The addition amount of the additive is, for example, 0.001 to 5% by mass. As the solvent, alcohol, ketone or the like can be used. Examples of the alcohol include methanol, ethanol, 1-propanol, isopropyl alcohol, and 1-butanol. Examples of the ketone include acetone and methyl ethyl ketone. In addition, the oil retention agent does not need to contain a solvent.

  In order to form the oil retaining films 11 to 13, the oil retaining agent is applied to the surface to be formed (the tip surface 3a, the outer circumferential surface 7a, the inner circumferential surface 4a, and the facing region 6b) to form a coating film. The oil retaining films 11 to 13 are obtained by drying the coating film and removing the solvent.

(Operation of watch parts)
Lubricating oil 8 is supplied between the shaft body 1 and the bearing 2. Examples of the lubricating oil 8 include aliphatic hydrocarbon oils such as polyalphaolefin (PAO) and polybutene; aromatic hydrocarbon oils such as alkylbenzene and alkylnaphthalene; ester oils such as polyol esters and phosphate esters; Ether oil such as polyalkylene glycol oil, silicone oil, fluorine oil and the like.

  The shaft body 1 rotates around the central axis C <b> 1 with respect to the bearing 2. A part of the outer peripheral surface of the shaft body 1 (the outer peripheral surface 7a of the insertion portion 7) may slide with respect to the inner peripheral surface of the bearing 2 (the inner peripheral surface 4a of the through hole 4).

Since the watch component 10 has the oil retaining films 11 to 13 having high lipophilicity, it exhibits high oil retaining performance with respect to the lubricating oil 8. Therefore, even when vibration is applied to the timepiece component 10 and when the position of the horn portion 3 in the through hole 4 varies as shown in FIG. And the bearing 2). Therefore, since the state where the lubricating oil 8 is present at the sliding portion (between the shaft body 1 and the bearing 2) is maintained, deterioration due to wear or the like of the shaft body 1 and the bearing 2 is suppressed, and stable operation over a long period of time. It becomes possible.
In addition, as shown in FIG. 4, even if a gap is generated between the relief portion 3 and the inner peripheral surface 4 a of the through hole 4, the lubricant 8 remains on the surfaces of the oil retaining films 11 to 13. Therefore, the oil retaining films 11 to 13 are not exposed. Therefore, even when the shaft body 1 slides with respect to the bearing 2, the oil retaining films 11 to 13 are not easily worn or peeled off. Therefore, the oil retaining performance is maintained over a long period of time and stable operation is possible.

[Second Embodiment]
A timepiece component 20 (mechanical component) according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 5 is a cross-sectional view showing one embodiment of the timepiece component 20. FIG. 6 is a cross-sectional view showing another embodiment of the timepiece component 20. FIG. 7 is a cross-sectional view showing still another form of the timepiece component 20. Hereinafter, parts common to the above-described embodiments are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 5, the timepiece component 20 includes a shaft body 21 (first component), a bearing 22 (second component), and oil retaining films 31 and 32.
The shaft body 21 includes a small-diameter portion 23 formed in a columnar shape and a large-diameter portion 26 connected to the small-diameter portion 23. A portion of the small diameter portion 23 that is inserted into the through hole 24 of the hole stone 25 is referred to as an insertion portion 27.

The bearing 22 includes a hole stone 25 having a through hole 24. For example, the hole stone 25 has a circular shape in plan view.
The through hole 24 is formed through the hole stone 25 in the thickness direction. The through hole 24 has, for example, a circular shape in plan view. The inner diameter of the through hole 24 is determined so that the small diameter portion 23 can be inserted. The inner diameter of the through hole 24 is larger than the outer diameter of the small diameter portion 23, for example. The inner peripheral surface 24 a (second surface region) of the through hole 24 faces the outer peripheral surface 27 a (first surface region) of the insertion portion 27.
The bearing 22 supports the shaft body 21 so as to be rotatable around the central axis C2.

The first oil retaining film 31 is formed on the outer peripheral surface 27 a of the insertion portion 27 of the small diameter portion 23. The first oil retaining film 31 has higher lipophilicity than the surface to be formed (the outer peripheral surface 27a).
The second oil retaining film 32 is formed on the inner peripheral surface 24 a of the through hole 24 of the hole stone 25. The second oil retaining film 32 has higher lipophilicity than the surface to be formed (inner peripheral surface 24a).
The material and the like of the oil retaining films 31 and 32 can be the same as the oil retaining films 11 to 13 in the first embodiment. The oil retaining films 31 and 32 can be formed in the same manner as the oil retaining films 11 to 13.

  Lubricating oil 8 is supplied between the shaft body 21 and the bearing 22. The shaft body 21 rotates around the central axis C <b> 2 with respect to the bearing 22. A part of the outer peripheral surface of the shaft body 21 may slide with respect to the inner peripheral surface of the bearing 22.

Since the watch component 20 has the oil retaining films 31 and 32 having high lipophilicity, it exhibits high oil retaining performance with respect to the lubricating oil 8. Therefore, even when vibration is applied to the timepiece component 20 and when the position of the small diameter portion 23 in the through hole 24 varies as shown in FIG. 21 between the bearing 21 and the bearing 22). Therefore, since the state where the lubricating oil 8 is present at the sliding portion (between the shaft body 21 and the bearing 22) is maintained, deterioration due to wear or the like of the shaft body 21 and the bearing 22 is suppressed, and stable operation over a long period of time. It becomes possible.
Further, as shown in FIG. 7, even if a gap is generated between the small diameter portion 23 and the inner peripheral surface 24 a of the through hole 24, the lubricating oil 8 remains on the surfaces of the oil retaining films 31 and 32. Therefore, the oil retaining films 31 and 32 are not exposed, and therefore, even when the shaft body 21 slides with respect to the bearing 22, the oil retaining films 31 and 32 are not easily worn or peeled off. Therefore, the oil retaining performance is maintained over a long period of time and stable operation is possible.

[Third Embodiment]
A timepiece component 30 (mechanical component) according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 8 is a cross-sectional view showing the watch component 30. Hereinafter, parts common to the above-described embodiments are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 8, the timepiece component 30 has the same configuration as the timepiece component 10 of the first embodiment except that the oil repellent films 14 to 17 are formed.
An oil repellent film 14 is formed in a region adjacent to the outer peripheral surface 7a on which the oil retaining film 11 is formed (referred to as a first adjacent region 3c) in the outer peripheral surface 3b of the ridge portion 3. The oil repellent film 14 is less oleophilic than the surface to be formed (first adjacent region 3c).
The first adjacent region 3 c is adjacent to the outer peripheral surface 7 a over the entire circumference of the ridge portion 3. Therefore, the oil repellent film 14 is adjacent to the oil retaining film 11 over the entire circumference of the ridge portion 3. The region where the oil repellent film 14 is formed (first adjacent region 3 c) may be the entire region where the oil retaining film 11 is not formed on the surface of the relief portion 3, or may be a partial region. Good.

  An oil repellent film 15 is formed on the first surface 5 a of the surface of the hole stone 5 that faces the stone 6. The oil repellent film 15 is less lipophilic than the surface to be formed (first surface 5a). The 1st surface 5a is an example of the 2nd adjacent area | region adjacent to the internal peripheral surface 4a in which the oil retaining film 12 was formed. The first surface 5 a is a region adjacent to the inner peripheral surface 4 a over the entire circumference of the hole stone 5. Therefore, the oil repellent film 15 is adjacent to the oil retaining film 12 over the entire circumference of the hole stone 5. The oil repellent film 15 may be formed on the entire first surface 5a or may be formed in a partial region.

  An oil repellent film 16 is formed on the second surface 5b of the surface of the hole stone 5 which is the surface opposite to the first surface 5a. The oil repellent film 16 is less lipophilic than the surface to be formed (second surface 5b). The second surface 5b is another example of the second adjacent region adjacent to the inner peripheral surface 4a on which the oil retaining film 12 is formed. The second surface 5 b is a region adjacent to the inner peripheral surface 4 a over the entire circumference of the hole stone 5. Therefore, the oil repellent film 16 is adjacent to the oil retaining film 12 over the entire circumference of the hole stone 5. The oil repellent film 16 may be formed on the entire second surface 5b or may be formed in a partial region.

  An oil repellent film 17 is formed in a region (outer peripheral region 6 c) adjacent to the facing region 6 b in the facing surface 6 a of the stone 6. The oil repellent film 17 has lower lipophilicity than the surface to be formed (the outer peripheral region 6c). The outer peripheral area 6 c is an area that surrounds the facing area 6 b and is adjacent to the facing area 6 b over the entire circumference of the stone 6. Therefore, the oil repellent film 17 is adjacent to the oil retaining film 13 over the entire circumference of the stone 6. The outer peripheral region 6c on which the oil repellent film 17 is formed may be the entire region where the oil retaining film 13 is not formed on the facing surface 6a, or may be a partial region.

  When the contact angle on the surface of the oil repellent films 14 to 17 is larger than the contact angle on the surface to be formed, it can be said that the oil repellent films 14 to 17 are less lipophilic than the surface to be formed. The oil repellent films 14 to 17 are made of, for example, a material having a surface energy smaller than that of the constituent material of the formation surface.

  The oil repellent films 14 to 17 contain, for example, a compound represented by the following formula (7).

（Ｍ₂はＳｉ、Ｔｉ、Ｚｒのうちいずれか１つである。Ｒｆはフッ素含有基である。Ｙ₃、Ｙ₄は炭化水素基、水酸基、または、加水分解等により水酸基を生成する官能基である。Ｚ₂は、極性基である。）

(M ₂ is one of Si, Ti, and Zr. Rf is a fluorine-containing group. Y ₃ and Y ₄ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. Z ₂ is a polar group.)

Examples of the fluorine-containing group include alkyl groups containing one or more fluorine atoms. Examples of the alkyl group containing one or more fluorine atoms include a perfluoroalkyl group and a perfluoropolyether group.
The “functional group capable of generating a hydroxyl group by hydrolysis or the like” is, for example, an alkoxy group, an aminoxy group, a ketoxime group, an acetoxy group, etc., and one or more of these can be used. Examples of the alkoxy group include a methoxy group, an ethoxy group, and a propoxy group, and one or more of these can be used.
The polar group is a functional group having polarity. Examples of the polar group include a hydroxyl group, a carboxy group, a sulfo group, an amino group, a phosphoric acid group, a phosphino group, a silanol group, an epoxy group, an isocyanate group, a cyano group, a vinyl group, and a thiol group. Or two or more can be used.
The content of the compound represented by the formula (7) in the oil repellent films 14 to 17 is, for example, 50% by mass or more.

In the compound represented by the formula (7), for example, the polar group constitutes a surface to be formed (first adjacent region 3c, first surface 5a, second surface 5b, and outer peripheral region 6c) by dehydration condensation, hydrogen bonding, or the like. It binds or adsorbs to the material to be made (for example, an inorganic substance such as a metal).
In the compound represented by the formula (7), the functional group represented by Z ₂ , Y ₃ and Y ₄ may be in a form in which a part of the constituent elements is missing due to bonding. For example, the hydroxyl group (—OH) as Z ₂ may be in the form of “—O—” by bonding to the surface to be formed by dehydration condensation. The hydroxyl group (—OH) as Y ₃ and Y ₄ may be in the form of “—O—” by bonding with other Y ₃ or Y ₄ by dehydration condensation. Similarly, a carboxy group (—COOH) may be in the form “—COO—” by a bond.
The compound represented by the formula (7) can improve the oil repellency of the oil repellent films 14 to 17.

  As a compound shown in Formula (7), the compound of Formula (8) shown next can be illustrated, for example.

  The compound represented by the formula (7) can be obtained, for example, by hydrolyzing the compound represented by the following formula (9).

（Ｘ₂は、加水分解等により水酸基を生成する官能基である。）

(X ₂ is a functional group that generates a hydroxyl group by hydrolysis or the like.)

The “functional group capable of generating a hydroxyl group by hydrolysis or the like” is, for example, an alkoxy group, an aminoxy group, a ketoxime group, an acetoxy group, etc., and one or more of these can be used. Examples of the alkoxy group include a methoxy group, an ethoxy group, and a propoxy group, and one or more of these can be used.
Examples of the compound represented by the formula (9) include trimethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl) silane and triethoxy-1H, 1H, 2H, 2H-tridecafluoro-n-octylsilane. it can. Trimethoxy (1H, 1H, 2H, 2H-heptadecafluorodecyl) silane is a compound of the formula (10) shown below.

(Formation of oil-repellent film)
For the formation of the oil repellent films 14 to 17, for example, an oil repellent treatment agent containing an oil repellent agent containing a compound of the formula (7) and a solvent is used.
An additive (for example, a curing catalyst such as dibutyltin diurarate) may be added to the oil repellent. The addition amount of the additive is, for example, 0.001 to 5% by mass.
As a solvent, what was illustrated as a solvent used for an oil retaining agent can be used. Note that the oil repellent treatment agent may not contain a solvent.

  In order to form the oil repellent films 14 to 17, the oil repellent treatment agent is applied to the surfaces to be formed (the first adjacent region 3c, the first surface 5a, the second surface 5b, and the outer peripheral region 6c) to form a coating film. Form. The oil-repellent films 14 to 17 are obtained by drying the coating film and removing the solvent.

  The oil repellent films 14 to 17 are preferably formed after the oil retaining films 11 to 13 are formed. Accordingly, the oil repellent films 14 to 17 can be formed adjacent to the oil retaining films 11 to 13 without a gap. Thereby, it is possible to reliably prevent the lubricating oil 8 from flowing out between the shaft body 1 and the bearing 2. Therefore, it is possible to prevent the occurrence of a problem (linking) in which the components are fixed to each other by the spilled lubricating oil 8.

  Since the timepiece component 30 includes the oil retaining films 11 to 13, the lubricating oil 8 hardly flows out. Therefore, similarly to the timepiece component 10 of the first embodiment, a stable operation over a long period of time is possible.

  Since the timepiece component 30 includes the oil repellent films 14 to 17 adjacent to the oil retaining films 11 to 13, the lubricating oil 8 is unlikely to flow out from the surfaces of the oil retaining films 11 to 13. Therefore, the oil retaining performance in the oil retaining films 11 to 13 can be further enhanced. Therefore, stable operation over a long period of time is possible.

[Fourth Embodiment]
A timepiece component 40 (mechanical component) according to a fourth embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a cross-sectional view showing the watch component 40. Hereinafter, parts common to the above-described embodiments are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 9, the timepiece component 40 has the same configuration as the timepiece component 20 of the second embodiment except that the oil repellent films 34 to 37 are formed.

An oil repellent film 34 is formed in a region adjacent to the outer peripheral surface 27a on which the oil retaining film 31 is formed (referred to as a first adjacent region 23c) in the outer peripheral surface 23b of the small diameter portion 23. The oil repellent film 34 is less oleophilic than the surface to be formed (first adjacent region 23c).
The first adjacent region 23 c is adjacent to the outer peripheral surface 27 a over the entire circumference of the small diameter portion 23. Therefore, the oil repellent film 34 is adjacent to the oil retaining film 31 over the entire circumference of the small diameter portion 23. The region where the oil repellent film 34 is formed (the first adjacent region 23c) may be the entire region where the oil retaining film 31 is not formed in the outer peripheral surface 23b of the small diameter portion 23, or may be a partial region. There may be.

An oil repellent film 35 is formed on the first surface 25 a of the surface of the hole stone 25. The oil repellent film 35 has lower lipophilicity than the surface to be formed (first surface 25a).
The first surface 25a is an example of a second adjacent region adjacent to the inner peripheral surface 24a on which the oil retaining film 32 is formed. The first surface 25 a is a region adjacent to the inner peripheral surface 24 a over the entire circumference of the hole stone 25. Therefore, the oil repellent film 35 is adjacent to the oil retaining film 32 over the entire circumference of the hole stone 25. The oil repellent film 35 may be formed on the entire first surface 25a, or may be formed in a partial region.

An oil repellent film 36 is formed on the second surface 25b of the surface of the hole stone 25, which is the surface opposite to the first surface 25a. The oil repellent film 36 is less lipophilic than the surface to be formed (second surface 25b).
The second surface 25b is another example of the second adjacent region adjacent to the inner peripheral surface 24a on which the oil retaining film 32 is formed. The second surface 25 b is a region adjacent to the inner peripheral surface 24 a over the entire circumference of the hole stone 2. Therefore, the oil repellent film 36 is adjacent to the oil retaining film 32 over the entire circumference of the hole stone 25. The oil repellent film 36 may be formed on the entire second surface 25b or may be formed in a partial region.

  An oil repellent film 37 is formed in a region (outer peripheral region 26 c) adjacent to the outer peripheral surface 23 b of the small diameter portion 23 in the facing surface 26 a of the enlarged diameter portion 26. The oil repellent film 37 is less lipophilic than the surface to be formed (the outer peripheral region 26c).

  The material and the like of the oil repellent films 34 to 37 can be the same as those of the oil repellent films 14 to 17 in the third embodiment.

  Since the timepiece component 40 includes the oil retaining films 31 and 32, the lubricating oil 8 hardly flows out. Therefore, similarly to the timepiece component 30 of the third embodiment, a stable operation over a long period of time is possible.

  Since the timepiece component 40 includes the oil repellent films 34 to 37 adjacent to the oil retaining films 31 and 32, the lubricating oil 8 hardly flows out from the surfaces of the oil retaining films 31 and 32. Therefore, the oil retaining performance of the oil retaining films 31 and 32 can be further enhanced. Therefore, stable operation over a long period of time is possible.

[Fifth Embodiment]
A timepiece component 50 (mechanical component) according to a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a side view showing a timepiece component 50 according to the fifth embodiment of the present invention. FIG. 11 is a side view showing the timepiece component 50A in a state before the oil retaining film and the oil repellent film are formed. FIG. 12 is a side view showing a timepiece component 50A on which an oil retaining film is formed.

As shown in FIG. 10, the timepiece part 50 includes a gear 60 (first part) and a bearing (second part) (not shown).
The gear 60 includes a shaft portion 51 and a gear portion 52 fixed to the shaft portion 51.
The first end portion 53 (first side portion) and the second end portion 54 (second side portion) of the shaft portion 51 are rotatably supported by the bearing (second component). The outer peripheral surface (first surface region) of the first end portion 53 and the second end portion 54 may slide with respect to the inner peripheral surface (second surface region) of the bearing. The outer peripheral surface (first surface region) of the intermediate portion 55 (intermediate portion in the length direction) of the shaft portion 51 may slide with respect to the inner peripheral surface (second surface region) of the cylindrical pinion (not shown). There is.

Oil retaining films 61, 62, and 63 are formed on the outer peripheral surfaces of the first end portion 53, the second end portion 54, and the intermediate portion 55 of the shaft portion 51, respectively. The material and the like of the oil retaining films 61 to 63 can be the same as the oil retaining films 11 to 13 in the first embodiment.
Of the outer peripheral surface of the shaft portion 51, the first intermediate region 56 (first adjacent region) between the first end portion 53 and the intermediate portion 55, and between the intermediate portion 55 and the second end portion 54. Oil repellent films 64 and 65 are formed in the second intermediate region 57 (second adjacent region), respectively. The material and the like of the oil repellent films 64 and 65 can be the same as those of the oil repellent films 14 to 17 in the third embodiment.
As a bearing (2nd components) which supports the 1st end part 53 and the 2nd end part 54, the structure similar to the bearing 2 shown, for example in FIG. 1 etc. can be illustrated.

The timepiece component 50 can be manufactured, for example, as follows.
As shown in FIGS. 11 and 12, on the outer peripheral surfaces of the first end portion 53, the second end portion 54 and the intermediate portion 55 of the watch component 50A in which the oil retaining films 61 to 63 and the oil repellent films 64 and 65 are not formed. The oil retaining films 61, 62, and 63 are formed, respectively.
The oil retaining films 61 and 62 can be formed, for example, by applying an oil retaining agent to the first end portion 53 and the second end portion 54 by a dip method and drying.
The oil retaining film 63 can be formed, for example, by applying an oil retaining agent to the intermediate portion 55 by brushing or the like and drying.
Next, the oil repellent agent is applied to the first intermediate region 56 and the second intermediate region 57 by immersing the entire watch component 50 </ b> A on which the oil retaining films 61 to 63 are formed in the oil repellent agent. The oil repellent film 64, 65 is formed by drying the oil repellent treatment agent. Thereby, the timepiece component 50 shown in FIG. 10 is obtained.

Since the timepiece component 50 includes the oil retaining films 61 to 63, it is difficult for the lubricating oil to flow out. Therefore, stable operation over a long period of time is possible.
Since the timepiece component 50 includes the oil repellent films 64 and 65 adjacent to the oil retaining films 61 to 63, the lubricating oil hardly flows out from the surfaces of the oil retaining films 61 to 63. Therefore, the oil retaining performance of the oil retaining films 61 to 63 can be further enhanced.

[Sixth Embodiment]
(Mechanical watch)
A mechanical timepiece 201 using an escapement mechanism that is a timepiece part (mechanical part) according to a sixth embodiment of the present invention will be described. FIG. 13 is a plan view of the movement front side.
As illustrated in FIG. 13, the mechanical timepiece 201 includes a movement 210 and a casing (not shown) that houses the movement 210.

The movement 210 has a ground plate 211 constituting a substrate. A dial (not shown) is arranged on the back side of the main plate 211. A train wheel incorporated on the front side of the movement 210 is referred to as a front train wheel, and a train wheel incorporated on the back side of the movement 210 is referred to as a back train wheel.
A winding stem guide hole 211a is formed in the main plate 211, and a winding stem 212 is rotatably incorporated therein. The axial position of the winding stem 212 is determined by a switching device having a setting 213, a yoke 214, a yoke spring 215, and a back presser 216. In addition, a chichi wheel 217 is rotatably provided on the guide shaft portion of the winding stem 212.

  When the winding stem 212 is rotated in a state where the winding stem 212 is in the first winding stem position (0th stage) closest to the inside of the movement 210 along the rotation axis direction, The chichi wheel 217 rotates through the rotation. Then, as the hour wheel 217 rotates, the round hole wheel 220 meshing with the wheel rotates. And when this round hole wheel 220 rotates, the square wheel 221 which meshes with this rotates. Further, when the square hole wheel 221 rotates, the mainspring (power source) (not shown) housed in the barrel complete 222 is wound up.

  The front train wheel of the movement 210 includes a second wheel 225, a third wheel 226, and a fourth wheel 227 in addition to the barrel wheel 222 described above, and has a function of transmitting the rotational force of the barrel wheel 222. . Further, on the front side of the movement 210, an escapement mechanism 230 and a speed control mechanism 231 for controlling the rotation of the front wheel train are arranged.

The center wheel & pinion 225 is a gear that meshes with the barrel complete 222. The third wheel & pinion 226 is a gear that meshes with the second wheel & pinion 225. The fourth wheel & pinion 227 is a gear that meshes with the third wheel & pinion 226.
The speed regulating mechanism 231 is a mechanism for regulating the escapement mechanism 230, and includes a balance with hairspring 240.

(Escape mechanism)
The escapement mechanism 230 is a mechanism that controls the rotation of the front wheel train described above, and the escape wheel 235 (first part) that meshes with the fourth wheel & pinion 227 and the escape wheel 235 are allowed to escape. An ankle 236 (second part) that rotates regularly. The escapement mechanism 230 is a timepiece component (mechanical component) according to the sixth embodiment of the present invention.

  FIG. 14 is a plan view of the escape wheel & pinion 235. FIG. 15 is a plan view of the ankle 236. As shown in FIG. 14, the escape wheel 235 includes an escape wheel portion 101 and a shaft member 102 that is coaxially fixed to the escape wheel portion 101. A direction orthogonal to the axis of the shaft member 102 is referred to as a radial direction. In FIG. 14, the rotation direction of the escape wheel & pinion 235 is indicated by CW.

  The escape gear portion 101 includes an annular rim portion 111, a hub portion 112 disposed inside the rim portion 111, and a plurality of spoke portions 113 that connect the rim portion 111 and the hub portion 112. ing. The hub portion 112 has a disk shape, and the shaft member 102 is fixed to the center portion thereof by press fitting or the like. Each spoke part 113 extends radially from the outer peripheral edge of the hub part 112 toward the inner peripheral edge of the rim part 111.

  On the outer peripheral surface of the rim portion 111, a plurality of tooth portions 114 formed in a special saddle shape are provided projecting outward in the radial direction. The claw stones 144a and 144b (see FIG. 15) of the ankle 36, which will be described later, are engaged with the tips of the plurality of teeth 114.

The side surface of the tip portion of the tooth portion 114 is located on the back side in the rotation direction CW of the escape wheel 235, the stop surface 115a with which the stonestones 144a and 144b abut, and the back surface located on the near side in the rotation direction CW. 115b and an impact surface 115c which is a tip surface of the tooth portion 114.
A corner formed by the stop surface 115a and the impact surface 115c functions as a rocking corner 115d. A corner portion constituted by the back surface 115b and the impact surface 115c functions as a leaving corner 115e.
Of the tooth portion 114, the range from the stop surface 115a to the leaving corner 115e through the locking corner 115d constitutes the sliding surface 115 (first surface region).

An oil retaining film 116 is formed on the sliding surface 115. The material or the like of the oil retaining film 116 can be the same as that of the oil retaining films 11 to 13 in the first embodiment.
An oil repellent film similar to the oil repellent films 14 to 17 in the third embodiment may be formed in at least a region adjacent to the sliding surface 115 in the surface of the escape wheel 235.

  As shown in FIG. 15, the ankle 236 includes an ankle body 142d formed in a T shape by three ankle beams 143, and an ankle true 142f. The ankle body 142d is configured to be rotatable by an ankle true 142f that is a shaft. Both ends of the ankle stem 142f are supported so as to be rotatable with respect to the above-described ground plate 211 and an ankle receiver (not shown). In addition, the rotation range of the ankle 236 is restricted by a not-shown dead pin.

  Of the three ankle beams 143, two ankle beams 143 are provided with claw stones (entry stone 144a and output claw stone 144b) at the tip thereof, and the balance of the balance with the balance 240 is placed at the tip of the remaining one ankle beam 143. An uncle 145 that can be engaged with and disengaged (not shown) is attached. The claw stones (entry stone 144a and outgoing claw stone 144b) are made of a ruby formed in a prismatic shape, and are bonded and fixed to the ankle beam 143 with an adhesive or the like.

The leading end of the protruding claw stone 144b is located on the front side in the rotation direction CW of the escape gear portion 101 and is located on the far side in the rotation direction CW and the stop surface 146a that contacts the stop surface 115a of the tooth portion 114. It has a back surface 146b and an impact surface 146c that is the tip surface of the protruding claw stone 144b.
A corner formed by the stop surface 146a and the impact surface 146c functions as a rocking corner 146d. A corner portion constituted by the back surface 146b and the impact surface 146c functions as a leaving core 146e.
Of the protruding claw stone 144b, the range from the stop surface 146a through the locking corner 146d to the leaving corner 146e constitutes a sliding surface 146 (second surface region).
In addition, since the structure of the front-end | tip part of the entrance stone 144a is the same as that of the front-end | tip part of the exit claw stone 144b among the claw stones 144a and 144b, description is abbreviate | omitted.

An oil retaining film 147 is formed on the sliding surface 146. The material or the like of the oil retaining film 147 can be the same as that of the oil retaining films 11 to 13 in the first embodiment.
An oil repellent film similar to the oil repellent films 14 to 17 in the third embodiment may be formed in at least a region adjacent to the sliding surface 146 among the surfaces of the claw stones 144a and 144b.

Since the escapement mechanism 230 has the oil retaining films 116 and 147, the lubricating oil hardly flows out. Therefore, stable operation over a long period of time is possible.
When the oil repellent film adjacent to the oil retaining films 116 and 147 is formed, the oil retaining performance of the oil retaining films 116 and 147 can be further enhanced.

(Mechanism module)
A part of the movement 210 shown in FIG. 13, for example, an escapement mechanism 230 (see FIG. 13), a bearing (not shown) of the shaft member 102 (see FIG. 14) of the escape wheel 235, and an ankle 236. A unit provided with a bearing (not shown) of the ankle true 142f (see FIG. 15) is an example of a “mechanism module”.
Other examples of the mechanism module include a unit including a barrel complete 222, a second wheel 225, a third wheel 226, a fourth wheel 227 (see FIG. 13), and bearings (not shown). it can.
The mechanism module may be a gear box used for an analog quartz type timepiece.

[Seventh Embodiment]
FIG. 16 is a perspective view and a sectional view showing a hole stone 75 constituting a bearing (second part) of a timepiece part (mechanical part) according to a seventh embodiment of the present invention.
The hole stone 75 has a circular shape in a plan view, for example. The hole stone 75 has a through hole 74.
The through hole 74 is formed at the center of the hole stone 75 in a plan view, for example. The through hole 74 has, for example, a circular shape in plan view. In the through hole 74, for example, a shaft portion of the shaft body (first component) is inserted. As a shaft body (1st component), the structure similar to the shaft body 1 shown in FIG. 1 etc. can be illustrated, for example.

An oil retaining film 71 is formed on the inner peripheral surface 74 a (second surface region) of the through hole 74 of the hole stone 75. The oil retaining film 71 can have the same configuration as the oil retaining films 11 to 13 in the first embodiment.
Oil repellent films 72 and 73 are formed on the first surface 75a and the second surface 75b of the hole stone 75, respectively. The oil repellent films 72 and 73 can have the same configuration as the oil repellent films 14 to 17 in the third embodiment.

In the timepiece component, since the hole stone 75 has the oil retaining film 71, the lubricating oil hardly flows out. Therefore, stable operation over a long period of time is possible.
Since the timepiece component has the oil repellent films 72 and 73 adjacent to the oil retaining film 71, the oil retaining performance of the oil retaining film 71 can be further enhanced.

[Eighth Embodiment]
A timepiece part (mechanical part) according to an eighth embodiment of the present invention will be described. FIG. 17 is a cross-sectional view showing a part of a movement 310 using the timepiece component (mechanical component) of the eighth embodiment.
The movement 310 includes a second wheel 343, a minute wheel (not shown) that rotates based on the rotation of the second wheel 343, and a hour wheel 344 that rotates based on the rotation of the minute wheel. Prepare.
The center wheel & pinion 343 has an axle 360. The axle 360 extends so as to be coaxial with the central axis C <b> 3 and is rotatably inserted into the central pipe 325. The center pipe 325 extends so as to be coaxial with the center axis C3 and is held by the main plate 320.
An upper end portion 360 a of the axle 360 is pivotally supported by a tenon frame 363 disposed in the first wheel train receiver 328. A lower end portion 360 b of the axle 360 projects downward from the center pipe 325. A minute hand 313 is attached to the lower end 360 b of the axle 360.

  The hour wheel 344 is arranged so as to be coaxial with the center axis C <b> 3 of the center wheel & pinion 343, and is rotatably inserted into the center pipe 325. The hour wheel 344 has a cylindrical gear 344 a that meshes with the center wheel & pinion 343 via a minute wheel (not shown) or the like. An hour hand 312 is attached to the lower end portion of the hour wheel 344.

The center wheel 343, the center pipe 325, and the hour wheel 344 constitute a timepiece part (mechanical part) according to the eighth embodiment of the present invention.
The center wheel & pinion 343 is a first example of the first part. The center pipe 325 is an example of a second part. Since the axle 360 of the center wheel & pinion 343 rotates with respect to the center pipe 325, the outer peripheral surface (first surface region) of the axle 360 can slide with respect to the inner peripheral surface (second surface region) of the center pipe 325. There is sex.
An oil retaining film having the same configuration as the first oil retaining film 11 (see FIG. 1) in the first embodiment can be formed on a part or all of the outer peripheral surface of the axle 360 of the center wheel & pinion 343.
An oil retaining film having the same configuration as the second oil retaining film 12 (see FIG. 1) in the first embodiment can be formed on a part or all of the inner peripheral surface of the center pipe 325.

The hour wheel 344 is a second example of the first part. Since the hour wheel 344 rotates with respect to the center pipe 325, the inner peripheral surface (first surface region) of the hour wheel 344 may slide with respect to the outer peripheral surface (second surface region) of the center pipe 325. is there.
An oil retaining film having the same configuration as the first oil retaining film 11 (see FIG. 1) in the first embodiment can be formed on a part or all of the inner peripheral surface of the hour wheel 344.
An oil retaining film having the same configuration as that of the second oil retaining film 12 (see FIG. 1) in the first embodiment can be formed on a part or all of the outer peripheral surface of the center pipe 325.

  Since the timepiece part has the oil retaining film, it is difficult for lubricating oil to flow out. Therefore, stable operation over a long period of time is possible.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications made to the above-described embodiments without departing from the spirit of the present invention. That is, the specific shapes, configurations, and the like given in the embodiment are merely examples, and can be changed as appropriate.
For example, in the timepiece component 10 or the like of the first embodiment shown in FIG. 1, the oil retaining film is formed on both the shaft body 1 (first component) and the bearing 2 (second component). It suffices if it is formed on at least one of the first part and the second part. For example, the timepiece component 10 shown in FIG. 1 can be configured to have only one of the first oil retaining film 11 and the second oil retaining film 12.

In the timepiece component 10 shown in FIG. 1, the first oil retaining film 11 is formed on the outer peripheral surface 7a (first surface region) of the insertion portion 7, but the oil retaining film is formed at least on the first surface region. The surface of the first component may be formed over a wider range than the first surface region. In addition, the oil retaining film may be formed only on a part of the first surface region instead of the entire region.
Similarly, in the timepiece component 10 shown in FIG. 1, the second oil retaining film 12 is formed on the inner peripheral surface 4a (second surface region) of the through-hole 4, but the oil retaining film is formed at least on the second surface region. What is necessary is just to be made, and it may be formed over the range wider than a 2nd surface area | region among the surfaces of 2nd components. Further, the oil retaining film may be formed only on a part of the second surface region, not on the entire region.

In the timepiece component 30 or the like of the third embodiment shown in FIG. 8, the oil repellent film is formed adjacent to the oil retaining film, but the oil repellent film may be adjacent to the oil retaining film with a gap.
The mechanical component only needs to be able to slide relative to the first component and the second component. That is, the first part may slide with respect to the second part, or the second part may slide with respect to the first part. Further, both the first part and the second part may be slid with each other by operating.

FIG. 18 is a schematic diagram illustrating a first modification of the shaft body 1 (see FIG. 1). As shown in FIG. 18, a concave portion 9A is formed on the outer peripheral surface 7a of the insertion portion 7 of the shaft portion 3 of the shaft body 1A. The concave portion 9A is an annular groove along the axial direction of the shaft body 1A. The shape of the cross section of the recess 9A (the shape of the cross section passing through the central axis of the shaft body 1A) is rectangular. The first oil retaining film is formed on at least the outer peripheral surface 7 a, the inner surface of the recess 9 </ b> A, and the front end surface 3 a of the relief portion 3.
FIG. 19 is a schematic diagram illustrating a second modification of the shaft body 1. A shaft body 1B shown in FIG. 19 is different from the shaft body 1A (see FIG. 18) of the first modification in that the cross-sectional shape of the recess 9B (the cross-sectional shape passing through the central axis of the shaft body 1B) is an arc shape. . The first oil retaining film is formed on at least the outer peripheral surface 7 a, the inner surface of the recess 9 </ b> B, and the tip surface 3 a of the relief portion 3. In this shaft body 1B, since the recess 9B has an arcuate cross section, the force in the bending direction is less likely to concentrate at the location where the recess 9B is formed. Therefore, the shaft body 1B is not easily broken and damaged.
FIG. 20 is a schematic diagram illustrating a third modification of the shaft body 1. A shaft body 1C shown in FIG. 20 has a pair of annular convex portions 18 formed on the outer peripheral surface 7a at intervals in the axial direction of the shaft body 1C. The cross-sectional shape of the annular convex portion 18 (the cross-sectional shape passing through the central axis of the shaft body 1C) is a rectangular shape. A recess 9 </ b> C is formed between the two annular protrusions 18. The shape of the cross section of the recess 9C (the shape of the cross section passing through the central axis of the shaft body 1C) is rectangular. The first oil retaining film is formed on at least the outer peripheral surface 7 a, the outer surface of the annular convex portion 18, the inner surface of the concave portion 9 </ b> C, and the tip surface 3 a of the relief portion 3.

FIG. 21 is a schematic diagram illustrating a fourth modification of the shaft body 1. A shaft body 1D shown in FIG. 21 has a plurality of groove-like recesses 9D along the central axis direction formed in the annular region 19 that is a part of the outer peripheral surface 7a at intervals in the axial direction. The groove-like recess 9D is formed continuously from one end to the other end of the annular region 19 in the central axis direction.
FIG. 22 is a schematic diagram illustrating a fifth modification of the shaft body 1. A shaft body 1E shown in FIG. 22 has a plurality of groove-shaped recesses 9E. The shaft body 1E is different from the shaft body 1D shown in FIG. 21 in that the groove-like recess 9E is inclined with respect to the central axis direction. The inclination angle of the groove-like recess 9E with respect to the central axis direction is more than 0 ° and less than 90 °.
FIG. 23 is a schematic diagram illustrating a sixth modification of the shaft body 1. A shaft body 1F shown in FIG. 23 has a plurality of groove-shaped recesses 9F. The shaft body 1F is different from the shaft body 1D shown in FIG. 21 in that the groove-shaped recess 9F is annular along the direction around the axis.
FIG. 24 is a schematic diagram illustrating a seventh modification of the shaft body 1. A shaft body 1G shown in FIG. 24 has a plurality of groove-like recesses 9G formed in the annular region 19 along the central axis direction. The groove-like recess 9G is shorter than the groove-like recess 9D shown in FIG.
FIG. 25 is a schematic diagram illustrating an eighth modification of the shaft body 1. A shaft body 1H shown in FIG. 25 has a plurality of dot-shaped recesses 9H formed in an annular region 19 apart from each other.
FIG. 26 is a schematic diagram illustrating a ninth modification of the shaft body 1. A shaft body 1 </ b> I shown in FIG. 26 has a lattice-shaped groove-like recess 9 </ b> I formed in the annular region 19. The groove-like recess 9I has a plurality of groove-like recesses 9I1 that are inclined with respect to the central axis direction, and a plurality of groove-like recesses 9I2 that intersect the groove-like recess 9I1.
In the shaft bodies 1 </ b> A to 1 </ b> I shown in FIGS. 21 to 26, the first oil retaining film is formed at least on the outer peripheral surface 7 a, the inner surfaces of the groove-like recesses 9 </ b> D to 9 </ b> I,
The concave portions 9A to 9I are holding portions capable of holding lubricating oil.

The concave portions of the shaft bodies 1A to 1I shown in FIGS. 18 to 26 can be formed by cutting, transferring, laser processing, or the like. The oil retaining film can be formed by applying an oil retaining agent. Since the oil retaining agent penetrates into the concave portion by capillary action, it becomes easy to selectively form an oil retaining film in the concave portion.
In the shaft bodies 1A to 1I, even when the oil retaining film on the outer peripheral surface 7a is worn by sliding with respect to the bearing, the oil retaining films in the recesses 9A to 9I are not easily worn. Therefore, the shaft bodies 1 </ b> A to 1 </ b> I hold lubricating oil and can operate stably over a long period of time.
In addition, although recessed part 9D-9G, 9I shown in FIGS. 21-24 and FIG. 26 is a groove-shaped recessed part formed in the outer peripheral surface 7a, a recessed part is formed with the some protrusion formed in the outer peripheral surface 7a. The formed recessed part may be sufficient (refer the recessed part 9C of FIG. 20). The shape shown in FIGS. 21 to 24 and 26 can also be applied to the recess formed by the protrusion.

A larger surface area of the inner surface of the recess is preferable in terms of oil retention performance. For example, the recesses 9A and 9B shown in FIG. 18 and FIG. 19 are one-stage recesses, but the recesses have a shape having one or more recesses at the bottom of the recesses 9A and 9B, that is, a multistage structure. It may be adopted. Since the concave portion having a multistage structure has a large surface area on the inner surface, the lubricating oil is easily retained. Therefore, it is excellent in terms of oil retention performance.
As a shaft body, the structure by which the some dot-shaped convex part was formed in the outer peripheral surface 7a of the insertion part 7 can also be illustrated. In the shaft body of this example, the space secured between the dot-shaped convex portions is a holding portion capable of holding the lubricating oil.

FIG. 27 is a configuration diagram showing a first modification of the escape wheel 235 (see FIG. 14). Specifically, FIG. 27 is a side view of the distal end portion of the tooth portion 114A of the escape wheel 235A. As shown in FIG. 27, a recess 109A is formed in the impact surface 115Ac, which is the tip surface of the tooth portion 114A. The shape of the cross section of the recess 109A (the shape of the cross section parallel to the central axis of the escape wheel 235A and perpendicular to the impact surface 115Ac) is rectangular.
FIG. 28 is a configuration diagram showing a second modification of the escape wheel 235 (see FIG. 14). Specifically, FIG. 28 is a side view of the tip portion of the tooth portion 114B of the escape wheel 235B. As shown in FIG. 28, a recess 109B is formed in the impact surface 115Bc, which is the tip surface of the tooth portion 114B. The cross-sectional shape of the recess 109B (the cross-sectional shape parallel to the central axis of the escape wheel 235B and perpendicular to the impact surface 115Bc) is an arc shape.

  FIG. 29 is a schematic diagram showing a first example of the overall shape of the recesses 109A and 109B (see FIGS. 27 and 28). As shown in FIG. 29, a plurality of groove-like recesses 109 </ b> A (or recesses 109 </ b> B) are formed on the impact surface of the tooth portion of the escape wheel 235 </ b> A, 235 </ b> B (see FIGS. 27 and 28). The concave portion 109A (or the concave portion 109B) has a groove shape along the direction around the axis of the escape wheels 235A and 235B (see FIGS. 27 and 28). The recess 109A (or the recess 109B) is formed on the impact surface of the tooth portion from one end to the other end in the direction around the axis. With this structure, the sliding resistance of the escape wheels 235A and 235B can be kept low.

FIG. 30 is a schematic diagram showing a second example of the overall shape of the recesses 109A and 109B (see FIGS. 27 and 28). A plurality of recesses 109A (or recesses 109B) shown in FIG. 30 has a groove shape along the central axis direction of escape wheel 235A, 235B.
FIG. 31 is a schematic diagram showing a third example of the overall shape of the recesses 109A and 109B (see FIGS. 27 and 28). The plurality of recesses 109A (or recesses 109B) shown in FIG. 31 are groove-shaped along the direction of the shaft of the escape wheel 235A, 235B, and are shorter than the recesses shown in FIG.
FIG. 32 is a schematic diagram showing a fourth example of the overall shape of the recesses 109A and 109B (see FIGS. 27 and 28). A plurality of recesses 109A (or recesses 109B) shown in FIG. 32 are formed in a dot shape.
FIG. 33 is a schematic diagram showing a fifth example of the overall shape of the recesses 109A and 109B (see FIGS. 27 and 28). The plurality of groove-like recesses 109A (or recesses 109B) shown in FIG. 33 are different from the recesses shown in FIG. 29 in that they are formed in a direction inclined with respect to the direction around the axis. The inclination angle of the groove-shaped recess with respect to the direction around the axis is more than 0 ° and less than 90 °.
FIG. 34 is a schematic diagram showing a sixth example of the overall shape of the recesses 109A and 109B (see FIGS. 27 and 28). The groove-like recess 109A (or recess 109B) shown in FIG. 34 is formed in a lattice shape.
The recesses shown in FIGS. 29 to 34 are not limited to the impact surface of the tooth portion, but may be formed on the entire sliding surface (range from the stop surface to the reving corner through the locking corner).

FIG. 35 is a block diagram showing a first modification of the claw stone (see FIG. 15). Specifically, FIG. 35 is a side view of the tip portion of the claw stone 144A (entry stone and outgoing claw stone). As shown in FIG. 35, a recess 149A is formed on the impact surface 146Ac, which is the tip surface of the claw stone 144A. The shape of the cross section of the recess 149A (the shape of the cross section parallel to the center axis of the ankle and perpendicular to the impact surface 146Ac) is rectangular.
FIG. 36 is a block diagram showing a second modification of the claw stone (see FIG. 15). Specifically, FIG. 36 is a side view of the tip portion of the claw stone 144B (entry stone and outgoing claw stone). As shown in FIG. 36, a recess 149B is formed in the impact surface 146Bc, which is the tip surface of the claw stone 144B. The shape of the cross section of the recess 149B (the shape of the cross section parallel to the center axis of the ankle and perpendicular to the impact surface 146Bc) is an arc shape.
The overall shape of the recesses 149A and 149B may be the shape shown in any of FIGS. The recesses 149A and 149B are not limited to the impact surfaces of the claw stones 144A and 144B, and may be formed on the entire sliding surface (range from the stop surface to the reving corner through the locking corner).
The concave portion can be formed by cutting, transferring, laser processing or the like.

Oil retaining films are formed on the sliding surfaces of the escape wheels 235A and 235B and the claw stones 144A and 144B and the inner surfaces of the recesses. The oil retaining film can be formed by applying an oil retaining agent. Since the oil retaining agent penetrates into the concave portion by capillary action, it becomes easy to selectively form an oil retaining film in the concave portion.
Even if the escape wheel 235A, 235B and the claw stones 144A, 144B are worn, the oil retaining film in the recesses is not easily worn. Therefore, it is possible to hold the lubricating oil and perform a stable operation over a long period of time.

  The oil retaining film may be applied to, for example, a side surface of a date wheel tooth, a side surface of a jumper, an inner wall of a barrel. The holding portion (concave portion) may be formed in at least one of the first surface region of the first component and the second surface region of the second component. The shape of the holding portion is not limited to a concave shape as long as the holding oil can be held.

1, 1A to 1I, 21 · Shaft (first part), 2, 22 · Bearing (second part), 3c, 23c · First adjacent region (region adjacent to oil retaining film), 4a, 24a, 74a Inner peripheral surface (second surface region), 5a, 25a, first surface (region adjacent to the oil retaining film), 5b, 25b, second surface (region adjacent to the oil retaining film), 7a, 27a, outer peripheral surface ( (First surface region) 10, 20, 30, 40, 50 · watch parts (mechanical parts), 11 · first oil retaining film, 12 · second oil retaining film, 13 · third oil retaining film, 14 to 17, 34 ~ 37, 64, 65 · oil repellent film, 31, 32, 61 to 63, 116, 147 · oil retaining film, 60 · gear (first part), 75 · hole stone (second part), 56 · first intermediate region (Region adjacent to oil retaining film), 57 · second intermediate region (region adjacent to oil retaining film), 115 · sliding surface (first surface region), 1 4a, 144b, 144A, 144B ... claw stone, 146 · sliding surface (second surface area), 210, 310 · movement, 235, 235A, 235B · escape wheel (first part), 236 · ankle (first 2) 230, escape mechanism (mechanical parts), 343, second wheel (first part), 325, central pipe (second part), 344, hour wheel (first part).

Claims (10)

A first part having a first surface region;
A second part having a second surface region in which the first surface region is slidable;
A machine part comprising: an oil retaining film formed in at least one of the first surface region and the second surface region and having higher lipophilicity than the region.   2. The machine part according to claim 1, wherein an oil repellent film having lower lipophilicity than the region is formed in a region adjacent to the oil retaining film of at least one of the first component and the second component. The machine part according to claim 1 or 2, wherein the oil retaining film contains a compound represented by the following formula (1).

(M ₁ is any _one of Si, Ti, and Zr. R is a hydrocarbon group. Y ₁ and Y ₂ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. Z ₁ is a polar group.) The machine part according to claim 2, wherein the oil repellent film contains a compound represented by the following formula (2).

(M ₂ is one of Si, Ti, and Zr. Rf is a fluorine-containing group. Y ₃ and Y ₄ are a hydrocarbon group, a hydroxyl group, or a functional group that generates a hydroxyl group by hydrolysis or the like. Z ₂ is a polar group.) The first component is a shaft body rotatable around an axis,
The machine part according to any one of claims 1 to 4, wherein the second part is a bearing that rotatably supports the shaft body.   The mechanical component according to any one of claims 1 to 5, wherein a holding portion capable of holding lubricating oil is formed in at least one of the first surface region and the second surface region. .   The mechanical part according to claim 6, wherein the holding part is a concave part formed in the surface region.   A mechanism module comprising the mechanical component according to claim 1.   A movement comprising the machine part according to claim 1.   A timepiece comprising the movement according to claim 9.

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