JP5798888B2 - Electronic clock - Google Patents

Description

  The present invention relates to an electronic timepiece.

  Conventionally, for example, a dial plate and a solar panel having an insertion hole for inserting a pointer shaft that is rotationally driven by a movement at the center thereof are fixed to the movement by a frame-shaped support member. 2. Description of the Related Art A solar timepiece is known in which a cutout portion or a convex portion is provided on each outer peripheral portion, and an engaging portion that engages with the cutout portion or the convex portion is provided on a support member (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 11-148981

By the way, in the solar timepiece according to the above-described prior art, by engaging the notch portion or the convex portion provided on each outer peripheral portion of the dial and the solar panel with the engaging portion provided on the support member, The dial and solar panel are positioned and fixed.
However, there are dimensional errors in the dial plate, solar panel, and support member, and simply positioning the dial plate and solar panel at the outer periphery will cause the insertion hole provided in the dial plate and solar panel to be used as a pointer shaft. This causes a problem that the date letter escape window provided through the dial and the solar panel in the thickness direction in order to display the date by exposing the date wheel and the date dial is displaced. .

  In order to prevent such a problem, the insertion holes are enlarged in order to prevent the inner walls of the insertion holes of the dial plate and the solar panel, for example, from coming into contact with the pointer shaft in consideration of the displacement due to the dimensional error of each member. For example, if the date letter escape window is enlarged in order to prevent the date of the date wheel from being hidden by the dial and the solar panel, the power generation effective area of the solar panel is reduced and the desired generated power is secured. The problem of not being able to do arise.

  The present invention has been made in view of the above circumstances, and an electronic timepiece capable of fixing a solar panel with high accuracy and preventing the necessity of reducing the power generation effective area of the solar panel in advance in response to a positional shift. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, an electronic timepiece according to the first aspect of the present invention is a movement (for example, implementation) that rotationally drives a pointer shaft (for example, the pointer shaft 35 in the embodiment). A movement fixing member for fixing the movement (for example, a movement fixing frame 60 in the embodiment), and a through-hole into which the pointer shaft can be inserted (for example, solar in the embodiment) A solar panel having a panel through hole 47) (for example, the solar panel 12 in the embodiment), and a cylindrical member (for example, a guide in the embodiment) fixed to the movement and having the pointer shaft inserted coaxially. A bush 29), and the through hole is deformable by elastic deformation of the solar panel and is elastically engaged with the cylindrical member inserted into the through hole. The movement fixing member includes a restriction engaging portion (for example, the solar panel fixing protrusion 61 in the embodiment) for restricting the rotation of the solar panel, and the outer peripheral portion of the solar panel is the restriction engaging portion. Engaging portions (for example, the solar panel fixing groove 46 and the protrusion 81 in the embodiment) are provided.

  Furthermore, in the electronic timepiece according to the second aspect of the present invention, the solar panel has a notch portion that penetrates the solar panel in the thickness direction and communicates with the through hole (for example, the solar panel notch in the embodiment). Part 48).

  Furthermore, in the electronic timepiece according to the third aspect of the present invention, the solar panel includes a plurality of solar cells (for example, in the embodiment) divided by a dividing unit (for example, the dividing unit 41 in the embodiment). Solar cells 42a, 42b, and 42c), and the cutout portion is provided in the divided portion.

  Furthermore, in the electronic timepiece according to the fourth aspect of the present invention, the solar panel penetrates the solar panel in a thickness direction and can expose a character string displayed by the movement (for example, implementation). And the engagement portion is arranged radially outward from the window portion.

  Furthermore, the electronic timepiece according to the fifth aspect of the present invention is a dial (for example, an embodiment) having a dial through hole (for example, the dial through hole 51 in the embodiment) into which the pointer shaft can be inserted. The cylindrical member is provided with an elastic portion (for example, the elastic support portion 29d and the elastic protrusion portion 29e in the embodiment) that is inserted into the dial plate through-hole and elastically engages. The movement fixing member includes a dial restricting engagement portion (for example, a dial fixing protrusion 62 in the embodiment) for restricting the rotation of the dial, and the outer peripheral portion of the dial has the character A dial engaging portion (for example, the dial fixing groove 53 and the dial protrusion 82 in the embodiment) that engages with the plate restricting engaging portion is provided.

  Furthermore, in the electronic timepiece according to the sixth aspect of the present invention, the elastic portion is formed by cutting out a part of the cylindrical member.

  According to the electronic timepiece of the first aspect of the present invention, the solar panel is guided by the cylindrical member fixed to the movement, and the cylinder is inserted into the through hole provided in the solar panel for inserting the pointer shaft. By inserting the shaped member, the solar panel can be accurately positioned and fixed to the movement, and the inner wall of the through hole can be prevented from coming into contact with the pointer shaft.

  Further, by engaging an engaging portion (for example, groove or protrusion) on the outer periphery of the solar panel with a restricting engaging portion (for example, protrusion or groove) of the movement fixing member, By regulating the rotation in the circumferential direction, the solar panel can be accurately positioned and fixed to the movement also in the circumferential direction.

  As a result, even if there is a dimensional error in each member such as the solar panel and the movement fixing member, the solar panel is formed by previously forming a large through-hole in the solar panel in consideration of the positional deviation due to the dimensional error of each member. It is possible to prevent the necessity of reducing the effective power generation area.

  Moreover, since the through hole of the solar panel is elastically engaged with the cylindrical member, the solar panel can be accurately fixed.

  Furthermore, according to the electronic timepiece according to the second aspect of the present invention, the through-hole can be easily deformed by including the cutout portion communicating with the through-hole, and the cylindrical member can be easily inserted into the through-hole. can do.

  Furthermore, according to the electronic timepiece according to the third aspect of the present invention, it is possible to prevent the effective power generation area of the solar panel from decreasing.

  Furthermore, according to the electronic timepiece of the fourth aspect of the present invention, it is necessary to provide a region that does not contribute to power generation, such as a region for insulation, around the window portion. If this area is formed, an area that does not contribute to power generation, such as an insulating area, also needs to be provided around the groove. Therefore, by sharing these areas that do not contribute to power generation, Reduction of the power generation effective area can be suppressed.

  Further, according to the electronic timepiece of the fifth aspect of the present invention, the dial plate provided on the dial plate for inserting the pointer shaft so as to guide the dial plate by the cylindrical member fixed to the movement. By inserting the cylindrical member into the through hole, the dial can be accurately positioned and fixed to the movement, and the inner wall of the dial through hole can be prevented from coming into contact with the pointer shaft.

  Further, by engaging a dial engaging portion (for example, groove or protrusion) on the outer periphery of the dial with a dial restricting engaging portion (for example, protrusion or groove) of the movement fixing member, By restricting the rotation in the circumferential direction around the central axis, the dial can be positioned and fixed to the movement with high accuracy also in the circumferential direction.

  As a result, even if there is a dimensional error in each member such as the dial and the movement fixing member, the dial plate is formed with a large through-hole in advance in consideration of misalignment due to the dimensional error of each member. Therefore, it is possible to prevent the necessity of reducing the effective display area and the appearance of the dial plate from being impaired.

  Furthermore, according to the electronic timepiece of the sixth aspect of the present invention, the elastic portion can be easily formed.

It is principal part sectional drawing of the electronic timepiece which concerns on embodiment of this invention. It is a perspective view of the solar panel of the electronic timepiece which concerns on embodiment of this invention. It is a top view of the solar panel of the electronic timepiece which concerns on embodiment of this invention. It is a top view of the dial of the electronic timepiece which concerns on embodiment of this invention. It is a top view of the movement fixed frame of the electronic timepiece which concerns on embodiment of this invention. It is a top view which shows a part of movement fixed frame and solar panel of the electronic timepiece which concern on embodiment of this invention. It is a top view of the solar panel of the electronic timepiece which concerns on the 1st modification of embodiment of this invention. It is a top view of the solar panel of the electronic timepiece which concerns on the 2nd modification of embodiment of this invention. It is a top view of the solar panel of the electronic timepiece which concerns on the 3rd modification of embodiment of this invention. It is a top view of the dial of the electronic timepiece concerning the 4th modification of an embodiment of the invention.

Hereinafter, an electronic timepiece according to an embodiment of the present invention will be described with reference to the accompanying drawings.
An electronic timepiece 10 according to the present embodiment includes a casing (not shown) formed in a cylindrical shape from, for example, metal, a cover glass (not shown) mounted on the front side of the casing, and a rear surface of the casing. A rear cover (not shown) removably attached to the side, a movement 11 incorporated in a case closed by the housing, a solar panel 12 arranged on the surface side (cover glass side) of the movement 11, and solar And a dial 13 disposed on the front surface side (cover glass side) of the panel 12.

  For example, as shown in FIG. 1, the movement 11 is incorporated in a main plate 21, and rotates a train wheel 22 that is rotated by power such as a stepping motor, and at least a part of the train wheel 22 (for example, a fourth wheel 34). A wheel train receiver 23 that supports the wheel train receiver 23 and a presser plate 24 that holds the wheel train receiver 23 are provided.

  The train wheel 22 is, for example, a cylindrical wheel 31 that is rotatably arranged at the center of the main plate 21, and a cylindrical center that is coaxially arranged inside the hour wheel 31 and rotatably supports the hour wheel 31. A pipe 32, a cylindrical second wheel 33 coaxially disposed inside the center pipe 32 and rotatably supported, and a fourth wheel coaxially disposed inside the second wheel 33 and rotatably supported. And a car 34.

  And each shaft part of the hour wheel 31, the second wheel 33 and the fourth wheel 34 is inserted into a guide bush 29 described later so as to penetrate the solar panel 12 and the dial 13 on the surface of the dial 13. The pointer shaft 35 is configured to project from an hour hand indicating the hour, a minute hand indicating the minute, and a second hand indicating the second.

  Further, the movement 11 is fixed to the main plate 21 in a state of being separated from the hour wheel 31 by a disc spring 25, for example, and a date indicator press 26 for pressing a date dial (not shown) and a date indicator press 26 are provided. A guide pin 27 provided on the main plate 21 for positioning, a set screw 28 for fixing the date indicator presser 26 to the main plate 21, and a cylinder fitted in a through hole 26 a provided in the central portion of the date indicator presser 26. And a guide bush 29 having a shape.

  The guide bush 29 is formed in a cylindrical shape, for example, from metal or the like, and a plurality of step portions are formed on the outer peripheral surface from one end to the other end in the axial direction, and sequentially with the date wheel press fitting portion 29a. A solar panel fitting portion 29b, a solar panel locking portion 29c, an elastic support portion 29d, and an elastic projection portion 29e are provided.

  The date indicator press fitting portion 29a has, for example, an outer diameter that is equal to or slightly larger than the inner diameter of the through hole 26a of the date indicator presser 26, and is inserted into the through hole 26a of the date indicator presser 26, and is inserted into the through hole 26a. It is fixed to the date indicator presser 26 by driving or caulking.

  For example, the solar panel fitting portion 29b has a diameter that is increased by one step with respect to the date wheel press fitting portion 29a, and an outer diameter equivalent to the inner diameter of the solar panel through hole 47 provided in the center portion of the solar panel 12 described later. The solar panel 12 is fixed by being inserted into the solar panel through hole 47 of the solar panel 12 and fitting into the solar panel through hole 47.

  The solar panel locking portion 29c has, for example, an outer diameter that is one step larger than that of the solar panel fitting portion 29b, and locks the solar panel 12 from the other end side in the axial direction to the other end side in the axial direction. The movement of the solar panel 12 is regulated.

  The elastic support portion 29d is reduced in diameter by one step from, for example, the solar panel locking portion 29c, and has an outer diameter smaller than a dial plate through hole 51 provided in a central portion of the dial plate 13 described later, and is in the axial direction. At the other end portion, there is provided an elastic protrusion 29e that protrudes outward in the radial direction and has an outer diameter slightly larger than a dial through hole 51 of the dial 13 described later.

For example, as shown in FIG. 2, the elastic support portion 29d and the elastic projection portion 29e were cut out so as to extend from the other end in the axial direction of the guide bush 29 toward one end at a plurality of predetermined positions in the circumferential direction. A notch 29f is formed.
The elastic support portion 29d and the elastic projection portion 29e are elastically deformable inward in the radial direction by the notch portion 29f.
The elastic support portion 29d and the elastic projection portion 29e are inserted into the dial plate through hole 51 of the dial plate 13 while being elastically deformed, and the elastic projection portion 29e is elastically engaged with the inner peripheral surface of the dial plate through hole 51. The dial 13 is fixed.

The solar panel 12 is formed in a disk shape as shown in FIGS. 2 and 3, for example, and has a plurality of (for example, three) insulating dividing portions 41 extending in the radial direction and alternating with the dividing portions 41 in the circumferential direction. Are connected to the outer peripheral ends of a plurality of (for example, three) solar cells 42a, 42b, 42c in a fan-shaped plate shape and electrically connected in series, and the plurality of divided portions 41, and each solar cell 42a. , 42b, 42c, and an insulating frame portion 43 that covers the outer peripheral portion.
The solar panel 12 generates power using light such as sunlight that has passed through the dial 13 and outputs power used for driving the movement 11 to a power storage unit (not shown) such as a secondary battery or a capacitor.

In the frame portion 43, for example, two electrodes 44a and 44b are provided at two predetermined positions opposed in the radial direction.
The solar cell 42a is provided with a Japanese letter escape window 45 that penetrates the solar panel 12 in the thickness direction to expose a date wheel (not shown) and display the date.
A solar panel fixing groove 46 is formed on the outer peripheral surface 43A of the frame portion 43 at a position radially outward from the Japanese letter escape window 45.

A solar panel through hole 47 that penetrates the solar panel 12 in the thickness direction is provided in an insulating central portion 41a formed by connecting the inner peripheral ends of the plurality of divided portions 41 to each other.
In addition, a solar panel cutout 48 extending in the radial direction so as to penetrate the solar panel 12 in the thickness direction and communicate with the solar panel through hole 47 is formed in the inner peripheral portion of each divided portion 41. .

The solar panel through hole 47 and the solar panel notch 48 can be deformed by elastic deformation of the solar panel 12, and the solar panel through hole 47 is fitted into the solar panel fitting part 29 b of the guide bush 29.
That is, the solar panel through hole 47 and the solar panel notch 48 are elastically deformed so that the solar panel through hole 47 gets over the solar panel locking part 29c when the guide bush 29 is inserted into the solar panel through hole 47. . And the solar panel through-hole 47 which got over the solar panel latching | locking part 29c elastically engages with the solar panel fitting part 29b adjacent to the solar panel latching | locking part 29c.

  The dial 13 is formed into a disk shape by a non-conductive member such as a light-transmitting plastic, for example, and the surface is provided with indications such as time seconds, minutes, and hours, as shown in FIG. , A dial through hole 51 that penetrates the central portion of the dial 13 in the thickness direction, a date dial escape window 52 that communicates with the date dial escape window 45 of the solar panel 12, and a date dial escape on the outer peripheral surface 13A. And a dial fixing groove 53 provided at a position radially outward from the window 52.

  The movement fixing frame 60 for fixing the movement 11 is formed in an annular plate shape, for example, as shown in FIG. 5 and is fixed in the housing, and has an inner peripheral surface 60A that is complementary to the outer peripheral surface of the movement 11. ing.

In addition, as shown in FIG. 6A, for example, the movement fixing frame 60 protrudes radially inward from a predetermined position on the inner peripheral surface 60A and can engage with the solar panel fixing groove 46. A fixing protrusion 61 is provided.
The solar panel fixing protrusion 61 has, for example, a shape that bulges in the circumferential direction on the radially inner peripheral side, and the solar panel fitting portion 29 b of the guide bush 29 is fitted into the solar panel through hole 47 of the solar panel 12. In this state, the solar panel 12 is fixed by being mounted in the solar panel fixing groove 46, and the rotational movement in the circumferential direction around the central axis of the solar panel 12 is restricted.

In addition, as shown in FIG. 6B, for example, the movement fixing frame 60 protrudes outward in the axial direction from a predetermined position on the axial end surface 60B and can be engaged with the dial fixing groove 53. A fixing protrusion 62 is provided.
The dial fixing protrusion 62 has, for example, a shape that bulges in the circumferential direction on the outer peripheral side in the radial direction, and the elastic projection 29 e of the guide bush 29 is elastically engaged with the dial through hole 51 of the dial 13. The dial 13 is fixed by being mounted in the dial fixing groove 53, and the rotational movement in the circumferential direction around the central axis of the dial 13 is restricted.

  As described above, according to the electronic timepiece 10 according to the present embodiment, the solar panel 12 is inserted in order to guide the solar panel 12 by the cylindrical guide bush 29 fixed to the movement 11 and to insert the pointer shaft 35. By inserting the guide bush 29 into the solar panel through hole 47 provided in the solar panel 12, the solar panel 12 can be positioned and fixed with high precision to the movement 11, and the inner wall of the solar panel through hole 47 contacts the pointer shaft 35. This can be prevented.

  Furthermore, the solar panel fixing protrusion 61 of the movement fixing frame 60 is engaged with the solar panel fixing groove 46 on the outer peripheral surface 43 </ b> A of the solar panel 12 to restrict circumferential rotation around the central axis of the solar panel 12. Thus, the solar panel 12 can be positioned and fixed to the movement 11 with high accuracy also in the circumferential direction.

  Accordingly, for example, even if there is a dimensional error in each member such as the solar panel 12 and the movement fixing frame 60, the solar panel through-hole of the solar panel 12 is taken into account in advance by taking into account the positional deviation due to the dimensional error of each member. It is possible to prevent the necessity of reducing the effective power generation area of the solar panel 12 by forming 47 large.

  Moreover, the solar panel 12 includes the solar panel cutout portion 48 that communicates with the solar panel through hole 47, so that the solar panel through hole 47 can be easily deformed, and the guide bush 29 (particularly, the solar panel locking portion). 29c) can be easily inserted into the solar panel through-hole 47. Furthermore, since the solar panel through hole 47 is elastically engaged with the guide bush 29 (that is, the solar panel fitting portion 29b), the solar panel 12 can be accurately fixed.

  Further, since the solar panel cutout portion 48 is formed in the divided portion 41, it is possible to prevent the effective power generation area of the solar panel 12 from decreasing.

  Further, since the solar panel fixing groove 46 is formed at a position radially outward from the date letter escape window 45, it does not contribute to power generation such as an insulating region provided around the date letter escape window 45. By sharing the region and a region that does not contribute to power generation, such as an insulating region provided around the solar panel fixing groove 46, it is possible to suppress a decrease in the power generation effective area of the solar panel 12.

  Further, the guide bush 29 is guided to the dial through hole 51 provided in the dial 13 for inserting the pointer shaft 35 so that the dial 13 is guided by the cylindrical guide bush 29 fixed to the movement 11. By inserting, the dial 13 can be accurately positioned and fixed to the movement 11, and the inner wall of the dial through hole 51 can be prevented from coming into contact with the pointer shaft 35.

  Further, by engaging the dial fixing groove 53 on the outer peripheral surface 13 </ b> A of the dial 13 with the dial fixing protrusion 62 of the movement fixing frame 60, the circumferential rotation around the central axis of the dial 13 is restricted. Thus, the dial 13 can be positioned and fixed to the movement 11 with high accuracy also in the circumferential direction.

  Thus, for example, even if there is a dimensional error in each member such as the dial 13 and the movement fixing frame 60, the dial through hole of the dial 13 is previously taken into account in consideration of the positional deviation due to the dimensional error of each member. It is possible to prevent the need to reduce the effective display area of the dial 13 by forming 51 larger or to impair the appearance of the dial 13.

  Furthermore, the elastic support portion 29d and the elastic protrusion 29e can be easily elastically deformed simply by forming the notch 29f in the guide bush 29.

  In the above-described embodiment, for example, as in the first modification shown in FIG. 7, a plurality of pointer relief holes 70 are provided through the solar panel 12 in the thickness direction and appropriate pointers are inserted. May be.

In the above-described embodiment, the solar panel cutout portions 48 are provided in the plurality of (for example, three) divided portions 41 extending in the radial direction of the solar panel 12, but the present invention is not limited to this. For example, FIG. As shown in the second modification example, a solar panel cutout portion 48 is formed at an appropriate position on the inner peripheral side of each of the solar cells 42a, 42b, 42, and is smaller than the plurality of divided portions 41 (for example, Only two solar panel cutout portions 48 (for example, a solar panel cutout portion 48 formed in one divided portion 41 and a solar panel cutout portion 48 formed in one solar cell 42b) may be provided.
Thereby, it can prevent that the electric power generation effective area of the solar panel 12 reduces.

  In the embodiment described above, the date letter escape window 45 of the solar panel 12 and the date letter escape window 52 of the dial 13 may be omitted.

  In the embodiment described above, the solar panel fixing protrusion 61 and the dial fixing protrusion 62 may be integrally formed.

  In the above-described embodiment, the rotational movement of the solar panel 12 in the circumferential direction is restricted by the solar panel fixing groove 46 of the solar panel 12 and the solar panel fixing protrusion 61 of the movement fixing frame 60. However, the present invention is not limited to this. However, for example, as in the third modification shown in FIG. 9, the groove formed on the inner peripheral surface 60A of the movement fixing frame 60 protrudes radially outward from the outer peripheral surface 43A of the frame portion 43 of the solar panel 12. The solar panel 12 may be fixed by mounting the protrusion 81 to be attached.

  In the embodiment described above, the dial plate fixing groove 53 of the dial plate 13 and the dial plate fixing projection 62 of the movement fixing frame 60 restrict the rotational movement of the dial plate 13 in the circumferential direction. However, for example, as in the fourth modification shown in FIG. 10, the dial protrusion protruding outward in the radial direction from the outer peripheral surface 13 </ b> A of the dial 13 in the groove formed on the inner peripheral surface 60 </ b> A of the movement fixing frame 60. The dial 13 may be fixed by mounting 82.

10 Electronic timepiece 11 Movement 12 Solar panel 29 Guide bush (tubular member)
29d Elastic support part (elastic part)
29e Elastic protrusion (elastic part)
35 Pointer shafts 42a, 42b, 42c Solar cell 41 Dividing part 45 Date escape window (window part)
46 Solar panel fixing groove (engagement part)
47 Solar panel through hole (through hole)
48 Solar panel notch (notch)
51 Dial through hole 53 Dial fixing groove (Dial plate engaging part)
60 Movement fixing frame 61 Solar panel fixing protrusion (regulation engaging part)
62 Dial fixing protrusion (Dial plate restricting engagement part)
81 Protrusion (engagement part)
82 Dial projection (Dial plate engaging part)

Claims (5)

A movement to rotate the pointer shaft,
A movement fixing member for fixing the movement;
A solar panel having a through hole into which the pointer shaft can be inserted;
A cylindrical member fixed to the movement and having the pointer shaft inserted coaxially;
The through hole is deformable by elastic deformation of the solar panel, and elastically engages with the cylindrical member inserted into the through hole,
The movement fixing member includes a regulation engagement portion for regulating rotation of the solar panel,
The outer peripheral portion of the solar panel includes an engagement portion that engages with the restriction engagement portion ,
The solar panel includes a cutout portion that penetrates the solar panel in a thickness direction and communicates with the through hole . The solar panel includes a plurality of solar cells divided by a dividing unit,
The electronic timepiece according to claim 1 , wherein the cutout portion is provided in the division portion . The solar panel includes a window part that can penetrate the solar panel in a thickness direction and expose a character string displayed by the movement,
3. The electronic timepiece according to claim 1, wherein the engagement portion is disposed radially outward from the window portion . 4. A dial having a dial through hole into which the pointer shaft can be inserted,
The cylindrical member includes an elastic portion that is inserted into the dial through hole and elastically engages,
The movement fixing member includes a dial plate restricting engagement portion for restricting rotation of the dial.
4. The electronic timepiece according to claim 1 , wherein an outer peripheral portion of the dial includes a dial engaging portion that engages with the dial restricting engaging portion . 5. The electronic timepiece according to claim 4 , wherein the elastic portion is formed by cutting out a part of the cylindrical member .

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