Electronic timepiece

Abstract

An electronic timepiece is provided with an oscillator device that is difficult to apply stress to a quartz vibrator, and is high in accuracy. The electronic timepiece includes an oscillator device that houses a vibrator and an integrated circuit for timepiece control in a package; a circuit substrate that has an elastic function and has a first surface and a second surface; a first member that is provided with a plurality of first protruding portions; and a second member that is provided with second protruding portions that face the first protruding portions across the circuit substrate, a plurality of clamping positions of the circuit substrate being clamped by the first protruding portions and the second protruding portions, a length A1 of the first protruding portions, a length A2 of the second protruding portions, and a thickness P1 of the oscillator device being in a relationship of A1 > P1 > A2 > 0, and a clearance in which a shortest distance between the first surface and the first member is the length A1 or more being present on a first surface side of the circuit substrate, and a clearance in which a shortest distance between the second surface and the second member is the length A2 or more being present on a second surface side of the circuit substrate.

Description

Technical Field

[0001] This invention relates to electronic clocks and watches. Background Technology

[0002] Conventional electronic clocks, as shown in Patent Document 1, have included: a quartz oscillator that outputs a clock signal; and an integrated circuit that controls the rotation period of a stepper motor based on the clock signal. In such electronic clocks, the terminals of the quartz oscillator housed in a cylindrical casing are soldered to a circuit board. Furthermore, the quartz oscillator is pressed against a base plate by a spring and fixed in place to prevent displacement.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2003-287582

[0004] In such electronic clocks, the quartz crystal is pressed against the base plate by a spring and fixed in place to prevent shifting. This can potentially apply stress to the quartz crystal, reducing its time accuracy. Furthermore, because the quartz crystal is glued to the base plate, significant impacts, such as when it is dropped, can be applied to it, causing the fixing structure to deflect and become stressed, thus reducing time accuracy. Summary of the Invention

[0005] An electronic clock is characterized by comprising: an oscillating device housing an oscillator and an integrated circuit for clock control within a package; a circuit board having a flexible function and having a first surface and a second surface opposite to the first surface; a first component disposed opposite to the first surface and having a plurality of first protrusions; and a second component disposed opposite to the second surface and having a second protrusion disposed across the circuit board and opposite to the first protrusions, wherein the oscillating device is mounted on the first surface of the circuit board, and a plurality of clamping positions of the circuit board are provided by the first protrusions. The first protrusion and the second protrusion are clamped together. The plurality of clamping positions are located at a predetermined distance from the outer side of the outer edge of the oscillating device. The length A1 of the first protrusion, the length A2 of the second protrusion, and the thickness P1 of the oscillating device are related as A1>P1>A2>0. There is a gap on the first surface of the circuit board where the shortest distance between the first surface and the first component is greater than or equal to the length A1. There is also a gap on the second surface of the circuit board where the shortest distance between the second surface and the second component is greater than or equal to the length A2.

[0006] Another electronic clock is characterized by comprising: an oscillating device having an oscillator and an integrated circuit for clock control housed within a package; a circuit board having a flexible function and having a first surface and a second surface opposite to the first surface; a first component having a plurality of first protrusions; a second component having a second protrusion opposite to the first protrusions across the circuit board; a third component being disposed opposite to the first surface; and a fourth component being disposed opposite to the second surface, wherein a plurality of clamping positions of the circuit board are held by the first protrusions and the second surface. The second protrusion clamps the device, and the plurality of clamping positions are located at a predetermined distance from the outer side of the outer edge of the oscillating device. The length A1 of the first protrusion, the length A2 of the second protrusion, and the thickness P1 of the oscillating device are related as A1>P1>A2>0. Furthermore, there is a gap on the first surface of the circuit board where the shortest distance between the first surface and the third component is greater than or equal to the length A1, and there is a gap on the second surface of the circuit board where the shortest distance between the second surface and the fourth component is greater than or equal to the length A2. Attached Figure Description

[0007] Figure 1 This is a top view of the clock according to the first embodiment.

[0008] Figure 2 This is a schematic structural diagram of the clock according to the first embodiment.

[0009] Figure 3 This is a top view of the oscillating device.

[0010] Figure 4 yes Figure 3 The oscillating device shown is a cross-sectional view along line II.

[0011] Figure 5 This is a top view of the circuit board.

[0012] Figure 6 This is a cross-sectional view along line II-II of the circuit board of the first embodiment.

[0013] Figure 7 This is a perspective view of the circuit board according to the second embodiment.

[0014] Figure 8 The circuit board of the third embodiment and Figure 6 A sectional view at the same location.

[0015] Label Explanation

[0016] 1: Clock; 2: Battery; 3: Motor; 4: Needle; 7: Housing; 10: Oscillator; 11: Package; 12: Base; 13: Sealing component; 14: Cover; 15: Quartz oscillator; 16: IC; 16a: Connecting wire; 17: Recess; 17a: First recess; 17b: Second recess; 18: Internal terminal; 18a: Internal terminal; 19: External terminal; 20: Circuit board; 21: First surface; 22: Second surface; 231, 232, 233, 234: Clamping positions; 31: Component 1; 31a: Component; 31b: Component; 32: Component 2; 32a: Component; 32b: Component; 33: Component 3; 34: Component 4; 35: Component 1; 35a: Component 1; 35b: Component 1; 35w: Component 1; 36: Component 2; 36a: Component 2; 36b: Component 2; 36w: Component 2; 37a: Gap; 37b: Gap; A1: Length; A2: Length; P1: Thickness; S: Internal space. Detailed Implementation

[0017] 1. First Implementation Method

[0018] Reference Figures 1-6 Let us describe clock 1, which is an electronic clock according to the first embodiment. Furthermore, in Figure 6 For ease of explanation, the internal cross-sectional view of the oscillating device is omitted.

[0019] Clock 1 is a quartz clock, and it is a wristwatch that has a power source and uses hands to display the time.

[0020] like Figures 1-3 As shown, the clock 1 includes: a battery 2 as an energy source; a motor 3 that generates torque; hands 4 that display the time (hour and minute hands); an oscillating device 10, which houses a quartz oscillator 15 as an oscillator and an IC 16 as an integrated circuit for clock control within a package 11; a circuit board 20 on which the oscillating device 10 is mounted; a first component 31 and a second component 32 that hold the circuit board 20; and a housing 7 that houses these components.

[0021] Reference Figure 3 , Figure 4 To illustrate the oscillator device 10. Additionally, in Figure 3 For ease of explanation, a top view of the cover 14 is used. Figure 4 yes Figure 3The image shows a cross-sectional view (II). The oscillating device 10 has a package 11, and a quartz crystal 15 and an IC 16 housed within the package 11. The package 11, viewed from top, is approximately rectangular, about 5 mm square. The package 11 has a base 12 with a recess 17 opening on its upper surface in the +Z direction; and a cover 14 that covers the opening of the recess 17 and engages with the upper surface of the base 12 via a sealing member 13. Inside the package 11, an internal space S is formed by the recess 17, in which the quartz crystal 15 and IC 16 are housed. For example, the base 12 can be made of ceramic such as alumina, and the cover 14 can be made of a metallic material such as Kovar alloy. However, the materials used to construct the base 12 and the cover 14 are not limited to the materials described above.

[0022] The internal space S is airtight, under reduced pressure or near-vacuum conditions. This reduces viscous resistance and improves the vibration characteristics of the quartz oscillator 15. However, the environment of the internal space S is not particularly limited; for example, it could be atmospheric pressure filled with inert gases such as nitrogen.

[0023] Here, the normal direction from the quartz oscillator 15 or IC 16 to the surface of the cover 14 is defined as the +Z direction, the direction perpendicular to the +Z direction and from IC 16 toward the quartz oscillator 15 is defined as the +X direction, and the direction perpendicular to both the +Z and +X directions and from the vibrating plate of the quartz oscillator 15 toward the base is defined as the +Y direction.

[0024] The recess 17 is composed of a first recess 17a and a second recess 17b arranged in the Z direction. In a cross-sectional view viewed from a direction perpendicular to the +Z direction, the first recess 17a is larger than the second recess 17b, and the first recess 17a is disposed between the cover 14 and the second recess 17b in the Z-axis direction. Conversely, the second recess 17b is smaller than the first recess 17a, and is disposed between the base 12 and the first recess 17a in the Z-axis direction. Furthermore, a quartz oscillator 15 is disposed in the first recess 17a, and an IC 16 is disposed in the second recess 17b.

[0025] Furthermore, a plurality of internal terminals 18, 18a are disposed on the bottom surface of the first recess 17a, and a plurality of external terminals 19 are disposed on the lower surface of the base 12 opposite to the upper surface on which the recess 17 is formed. These internal terminals 18 and external terminals 19 are electrically connected via wiring (not shown) formed in the base 12.

[0026] Additionally, internal terminal 18 is electrically connected to quartz oscillator 15 via a conductive bonding material (not shown), and internal terminal 18a is electrically connected to IC 16 via bonding wire 16a. These internal terminals 18 and 18a are electrically connected via wiring (not shown) formed within the base 12.

[0027] The quartz oscillator 15 is a tuning fork-shaped vibrating plate, constructed from a Z-cut quartz substrate or the like. In this embodiment, the quartz oscillator 15 has a cantilever beam structure, and the base of the quartz oscillator 15 is fixed to the bottom surface of the first recess 17a via a conductive bonding material (not shown). After correcting the data obtained by exciting the quartz oscillator 15 to oscillate, the IC 16 outputs data from the external terminal 19 provided on the oscillating device 10.

[0028] like Figure 5 , Figure 6 As shown, stored in Figure 1 The circuit board 20 inside the casing 7 of the clock 1 shown has a first surface 21 and a second surface 22 opposite to the first surface 21. An oscillating device 10 is mounted on the first surface 21 of the circuit board 20, and terminals (not shown) provided on the first surface 21 are electrically connected to external terminals 19 of the oscillating device 10. Furthermore, the circuit board 20 is made of a flexible substrate, thus enabling it to absorb and release external impacts through its elastic function.

[0029] Inside the casing 7 of the clock 1, a first component 31 with three first protrusions 35 is disposed opposite to the first surface 21 of the circuit board 20, and a second component 32 with three second protrusions 36 is disposed opposite to the second surface 22 of the circuit board 20. The first component 31 is flat and functions as a receiving member. The second component 32 is flat and functions as a base plate.

[0030] The three first protrusions 35 are configured to protrude from the same surface of the first component 31 toward the first surface 21 of the circuit board 20, and are cylindrical or triangular prism-shaped. When the end of the first protrusion 35 located on the first component 31 side is designated as the base end and the end located on the first surface 21 side is designated as the front end, the length A1 of the first protrusion 35 from the base end to the front end in the Z direction exceeds the thickness P1 of the oscillating device 10, resulting in A1>P1. Specifically, the length A1 is 1.72 mm and the thickness P1 is 1.3 mm.

[0031] Three second protrusions 36 are configured to protrude from the same surface of the second component 32 toward the second surface 22 of the circuit board 20, and are cylindrical or triangular prism-shaped. When the end of the second protrusion 36 located on the second component 32 side is designated as the base end and the end located on the second surface 22 side is designated as the front end, the length A2 of the second protrusion 36 from the base end to the front end in the Z direction exceeds 0 mm and is less than the thickness P1 of the oscillating device 10, such that P1>A2>0. Specifically, the length A2 is 0.12 mm.

[0032] Three first protrusions 35 and three second protrusions 36 are positioned at clamping positions 231, 232, and 233, spaced apart by a predetermined distance from the outer edge of the oscillator 10 mounted on the circuit board 20, facing each other across the circuit board 20, thereby clamping the circuit board 20. Specifically, the outer direction refers to the direction in the XY plane from the oscillator 10 toward the outer edge of the circuit board 20, and the predetermined distance is approximately 3 mm.

[0033] Therefore, the clock 1 has a gap 37a on the first surface 21 side of the circuit board 20, where the shortest distance between the first surface 21 and the first component 31 is the same as the length A1, and a gap 37b on the second surface 22 side of the circuit board, where the shortest distance between the second surface 22 and the second component 32 is the same as the length A2. Thus, the length of the gap 37a in the Z direction exceeds the thickness P1 of the oscillating device 10, and the length of the gap 37b in the Z direction exceeds 0 mm and is less than the thickness P1 of the oscillating device 10.

[0034] The clamping positions 231, 232, and 233 are located at a predetermined distance from the outer edge of the oscillating device 10 in the circuit board 20. When viewed from the +Z direction, they are arranged such that the region B connecting the clamping positions 231, 232, and 233 overlaps with the center of gravity G of the oscillating device 10.

[0035] In this embodiment, the clamping positions 231, 232, and 233 are approximately triangular, approximately circular, and approximately quadrilateral, respectively. The shape or area of ​​the clamping positions is not particularly limited. They can be arbitrarily set according to the internal layout of the clock.

[0036] Furthermore, in this embodiment, three clamping positions 231, 232, and 233 are described, but at least three clamping positions are sufficient. In addition to clamping positions 231, 232, and 233, clamping positions can also be set at positions spaced at or above a predetermined distance. Thus, by adding clamping position 234, a total of four clamping positions can be provided.

[0037] When mounting the quartz oscillator 15 and IC 16 onto the circuit board 20, the integrated oscillator 10 housing both the quartz oscillator 15 and IC 16 is larger and heavier than the cylindrical housing housing only the quartz oscillator 15. Therefore, when the oscillator 10 is bonded to the base plate (second component 32), a greater impact is applied to the oscillator 10 upon drop, potentially causing damage to the quartz oscillator 15 or a decrease in accuracy. Therefore, in the clock 1 of this embodiment, a structure is formed in which the circuit board 20, on which the oscillator 10 is mounted, is clamped by a first protrusion 35 and a second protrusion 36 protruding from the base plate. Specifically, the clamping positions 231, 232, and 233 of the circuit board 20 are clamped by three first protrusions 35 and three second protrusions 36. By adopting this structure, the clock 1 can maintain the oscillating device 10 without contacting peripheral components other than the circuit board 20, and can suppress the transmission of shocks to the oscillating device 10.

[0038] Furthermore, the clock 1 has an oscillating device 10 mounted on a circuit board 20 held by three first protrusions 35 and three second protrusions 36, thereby enabling the oscillating device 10 to have gaps 37a and 37b in the Z direction.

[0039] When such a clock 1 is impacted by a drop or other event, the oscillating device 10 utilizes the elasticity of the circuit board 20 to oscillate in the direction of arrow Z1 or arrow Z2, absorbing the stress of the impact through oscillation. Furthermore, since there are gaps 37a and 37b in the Z direction, the oscillating device 10 will not collide with the first component 31 and the second component 32, thus reducing the impact on the quartz oscillator 15 housed in the oscillating device 10.

[0040] Therefore, the oscillating device 10 can be installed in a way that does not easily cause the quartz oscillator 15 to be affected by impacts such as pressing or dropping, so a high-precision clock 1 can be provided.

[0041] 2. Second Implementation Method

[0042] Next, refer to Figure 7 The clock 1a of the second embodiment will be described. Furthermore, structures identical to those in the first embodiment will be labeled with the same reference numerals, and repeated descriptions will be omitted.

[0043] The clock 1 of the first embodiment has three first protrusions 35 and three second protrusions 36, while in the clock 1a of the second embodiment, instead of them, it has a first protrusion 35, a first protrusion 35w, a second protrusion 36 and a second protrusion 36w.

[0044] The first protrusion 35 and the first protrusion 35w are configured to protrude from the same surface of the first component 31 toward the first surface 21 of the circuit board 20. Each first protrusion 35w is a wall-shaped protrusion capable of clamping at two of the three clamping positions 232 and 233. On the normal line overlapping with either clamping position 232 or clamping position 233, when the end of the first protrusion 35w located on the first component 31 side is designated as the base end and the end located on the first surface 21 side is designated as the front end, the length A1 of the first protrusions 35 and 35w in the Z direction from the base end to the front end exceeds the thickness P1 of the oscillating device 10, resulting in A1>P1. Specifically, the length A1 is 1.72 mm, and the thickness P1 is 1.3 mm.

[0045] Furthermore, a second protrusion 36 and a second protrusion 36w are provided on the second component 32. The second protrusion 36 and the second protrusion 36w are configured to protrude from the same surface of the second component 32 toward the second surface 22 of the circuit board 20. Each second protrusion 36w is a wall-shaped protrusion capable of clamping at two of the three clamping positions 232 and 233. When the end of the second protrusion 36w located on the second component 32 side is designated as the base end and the end located on the second surface 22 side is designated as the front end, the length A2 of the second protrusions 36 and 36w in the Z direction from the base end to the front end exceeds 0 mm and is less than the thickness P1 of the oscillating device 10, such that P1>A2>0. Specifically, the length A2 is 0.12 mm.

[0046] The clamping position 231 of the circuit board 20 housed in the casing 7 of the clock 1a is clamped by the first protrusion 35 and the second protrusion 36, and the clamping positions 232 and 233 are clamped by the first protrusion 35w and the second protrusion 36w.

[0047] Thus, in the clock 1a, the circuit board 20 on which the oscillating device 10 is mounted is clamped with an area wider than that in the first embodiment, so the oscillating device 10 is held stably without contacting the surrounding components.

[0048] Furthermore, in the second embodiment of the clock 1a, similar to the clock 1, the circuit board 20 has a fixed beam structure at both ends, the oscillating device 10 is held without being pressed, and there is a gap 37a on the first surface 21 side and a gap 37b on the second surface 22 side, so the oscillating device 10 will not collide with the first component 31 and the second component 32, and the impact on the quartz oscillator 15 housed in the oscillating device 10 can be reduced.

[0049] 3. Third Implementation Method

[0050] Next, refer to Figure 8The clock 1b of the third embodiment is described. Additionally, in... Figure 8 For ease of explanation, the internal cross-sectional view of the oscillating device 10 is omitted, the same reference numerals are used for structures identical to those in the first embodiment, and repeated descriptions are omitted.

[0051] In the clock 1 of the first embodiment, a first component 31 with three first protrusions 35 is disposed opposite to the first surface 21 of the circuit board 20, and a second component 32 with three second protrusions 36 is disposed opposite to the second surface 22 of the circuit board 20. In the clock 1b of the third embodiment, the first component is composed of components 31a and 31b as first constituent components, and the second component is composed of components 32a and 32b as second constituent components. In addition, components 31a, 31b, 32a, and 32b are disposed at positions that do not overlap with the oscillating device 10 when viewed from the +Z direction.

[0052] Inside the casing of the clock 1b, opposite to the first surface 21 of the circuit board 20, are provided: a component 31a, which has two first protrusions 35a respectively opposite to the clamping position 231 and the clamping position 233 (not shown); a component 31b, which has a first protrusion 35b opposite to the clamping position 232; and a third component 33 between components 31a and 31b. Components 31a and 31b are separate components and function as receiving members.

[0053] Two first protrusions 35a are configured to protrude from the -Z direction surface of component 31a toward the first surface 21, and a first protrusion 35b is configured to protrude from the -Z direction surface of component 31b toward the first surface 21, both being cylindrical or triangular prism-shaped. When the end of the first protrusion 35a on the component 31a side is designated as the base end and the end on the first surface 21 side as the front end, and the end of the first protrusion 35b on the component 31b side is designated as the base end and the end on the first surface 21 side as the front end, the length A1 of the first protrusions 35a and 35b in the Z direction from the base end to the front end exceeds the thickness P1 of the oscillating device 10, resulting in A1>P1. Specifically, the length A1 is 1.72 mm.

[0054] Furthermore, within the casing of the clock 1b, opposite to the second surface 22 of the circuit board 20, are provided: a component 32a having two second protrusions 36a; a component 32b having a second protrusion 36b; and a fourth component 34 between components 32a and 32b. Components 32a and 32b are separate components and function as a base plate or a second plate.

[0055] Two second protrusions 36a are configured to protrude from the +Z direction surface of component 32a toward the second surface 22, and two second protrusions 36b are configured to protrude from the +Z direction surface of component 32b toward the second surface 22, both being cylindrical or triangular prism-shaped. When the end of the second protrusion 36a on the component 32a side is designated as the base end and the end on the second surface 22 side as the front end, and the end of the second protrusion 36b on the component 32b side is designated as the base end and the end on the second surface 22 side as the front end, the length A2 of the second protrusions 36a and 36b in the Z direction from the base end to the front end exceeds 0 mm and is less than the thickness P1 of the oscillating device 10, resulting in P1>A2>0. Specifically, the length A2 is 0.12 mm.

[0056] Two first protrusions 35a and 36a, and two first protrusions 35b and 36b, are positioned opposite each other across the circuit board 20 at clamping positions 231, 232, and 233, thereby clamping positions 231 and 233 by the two first protrusions 35a and 36a. These clamping positions 231, 232, and 233 are located at a predetermined distance from the outer edge of the 5mm square oscillator 10 mounted on the circuit board 20 in a direction outwards. Additionally, clamping position 232 is clamped by the first protrusions 35b and 36b, thereby clamping the circuit board 20. Specifically, the outward direction refers to the direction along the XY plane, with a predetermined distance of approximately 3mm.

[0057] The third component 33 is positioned opposite the first surface 21 with a distance of length A1, and the fourth component 34 is positioned opposite the second surface 22 with a distance of length A2. Thus, the clock 1b has a gap 37a with a minimum distance of length A1 between the first surface 21 and the third component 33, and a gap 37b with a minimum distance of length A2 between the second surface 22 and the fourth component 34. Therefore, the length of the gap 37a in the Z direction exceeds the thickness P1 of the oscillating device 10, and the length of the gap 37b in the Z direction exceeds 0 mm and is less than the thickness P1 of the oscillating device 10.

[0058] Thus, in the clock 1b, the circuit board 20 on which the oscillating device 10 is installed becomes a beam structure with fixed ends by fixing three clamping positions 231, 232, and 233, and the oscillating device 10 is held in a way that does not contact the surrounding components other than the circuit board 20.

[0059] Furthermore, in the third embodiment, the clock 1b is similar to clocks 1 and 1a. The circuit board 20 is a beam structure with fixed ends, so the oscillating device 10 is held without being pressed. It has a gap 37a on the first surface 21 side and a gap 37b on the second surface 22 side. Therefore, the oscillating device 10 will not collide with the third component 33 and the fourth component 34, and the impact on the quartz oscillator 15 housed in the oscillating device 10 can be reduced.

[0060] In the first to third embodiments described above, a quartz watch was used as an example, but the present invention is not limited thereto. It can be applied to various types of watches, such as Spring Drive electronically controlled mechanical watches and solar-powered watches with power generation capabilities.

[0061] The invention has been described using a quartz oscillator 15 as an example, which is a tuning fork type oscillator, but the invention is not limited thereto. AT oscillators and MEMS oscillators can also be used as oscillators.

[0062] In the above embodiment, the oscillating device 10 is arranged in a top-view layout with the quartz oscillator 15 and the IC 16, but the present invention is not limited thereto. By forming a layout in which the quartz oscillator and the IC overlap, a smaller oscillating device can be used. As a result, miniaturization of electronic clocks and watches can be achieved.

[0063] In the above embodiments, the first protrusion and the second protrusion are formed in the shape of a cylinder, a triangular prism, or a wall, but their shape and number are not limited. As long as the circuit board can be clamped at a clamping position that is separated from the oscillating device by a specified distance, it is acceptable.

[0064] For example, in the second embodiment, the first protrusion 35w and the second protrusion 36w are formed as wall-shaped protrusions, but are not limited thereto. The length of the wall-shaped first protrusion only needs to be A1 at the position opposite to the clamping position; the length at the position not opposite to the clamping position is not limited. The first protrusion 35w and the second protrusion 36w may also be formed as arched shapes with shorter lengths at the positions not opposite to the clamping position. Alternatively, a convex shape may be formed only at the position opposite to the clamping position, resulting in a shape with a length of A1. In this case, the first protrusion 35w and the second protrusion 36w can also clamp the circuit board 20 at the clamping position.

[0065] Regarding the length of the gaps 37a and 37b in the Z direction, as long as the oscillating device 10 does not come into contact with the component arranged in the Z direction when it swings due to an impact from an external force, etc., the length of the gaps 37a and 37b in the Z direction can be made to be longer than length A1 by bending the surface of the component opposite to the first surface 21 of the circuit board 20 or making it into a stepped shape.

[0066] In the above embodiment, the first surface 21 is positioned in the +Z direction, but it is not limited thereto. By positioning the first surface 21 on which the oscillating device 10 is mounted in the -Z direction, setting the length of the first protrusion 35 to length A2, and setting the length of the second protrusion 36 to length A1, gaps 37a and 37b can also be ensured around the oscillating device 10. Thus, the same effect as the above embodiment can be obtained.

[0067] The predetermined distances from the outer edge of the oscillating device 10 at the various clamping positions located on the circuit board 20 can be appropriately varied according to the size or weight of the oscillating device. This is only necessary to ensure that the oscillating device does not come into contact with components positioned in the Z direction when it oscillates due to impacts from external forces.

[0068] The electronic clock of the present invention is not limited to the embodiments described above, and can be used in appropriate combinations of the embodiments. For example, the circuit board 20 can be clamped by the first protrusion 35 of the first embodiment and the second protrusion 36b of the third embodiment. Furthermore, the circuit board 20 can also be clamped by the first protrusions 35, 35w of the second embodiment and the second protrusions 36a, 36b of the third embodiment. Even in these ways, a high-precision electronic clock can be provided, which is less susceptible to the effects of pressure or impacts such as drops on the quartz oscillator.

[0069] In the above embodiments, the number of the first protrusion and the second protrusion are the same, but this is not a limitation. The number of the second protrusion may also be greater than the number of the first protrusion. In this case, in a projection view from the +Z direction, the plurality of second protrusions are configured not to overlap with the oscillating device 10. Furthermore, the circuit board 20 is clamped by the first protrusion and the second protrusion at three or more clamping positions. Alternatively, the number of the first protrusion may be greater than the number of the second protrusion. By adopting this method, the circuit board 20 can be stably supported, which helps to stabilize the operation of the quartz oscillator 15.

[0070] Furthermore, in the second embodiment, the clamping positions 232 and 233 of the circuit board 20 are formed by the first protrusion 35w and the second protrusion 36w, but it is not limited to this. It is also possible for the clamping positions 232 and 233 to be clamped by two first protrusions 35w and one second protrusion 36w. Alternatively, it is possible for the clamping to be performed by one first protrusion 35w and multiple second protrusions 36w. By adopting this method, clamping stability and weight reduction of the first component with the first protrusion can be achieved.

[0071] Furthermore, the circuit board 20 held by the first protrusion 35w or the second protrusion 36w can have three or more clamping positions. In this case, it is possible to configure a structure that uses one first protrusion 35w or one second protrusion 36w to clamp the circuit board 20.

[0072] The above-described embodiments house the quartz oscillator 15 and IC 16 within the package 11, but are not limited to this. As long as... Figure 5Quartz oscillator 15 and IC 16 can be arranged in region B. In this case, in a top view from the +Z direction, the centroid of the imaginary rectangle containing quartz oscillator 15 and IC 16 only needs to overlap with region B. With this configuration, the same effect can be achieved by simply using the existing component configuration design without designing a new IC 16. However, it is preferable that the distance between quartz oscillator 15 and IC 16 is relatively short.

Claims

1. An electronic timepiece characterized by comprising: An oscillation device having a vibrator and a clock control integrated circuit housed in a package; A circuit substrate having a function of elasticity and having a first surface and a second surface in a front-and-back relationship with the first surface; A first member disposed in opposition to the first surface and provided with a plurality of first protruding portions; and A second member disposed in opposition to the second surface and provided with second protruding portions in opposition to the first protruding portions across the circuit substrate, The circuit substrate mounting the oscillation device on the first surface, a plurality of holding positions of the circuit substrate being held by the first protruding portions and the second protruding portions, the plurality of holding positions being located at a prescribed distance in an outer side direction from an outer edge of the oscillation device, A length A1 of the first protruding portions, a length A2 of the second protruding portions, and a thickness P1 of the oscillation device being in a relationship of A1 > P1 > A2 > 0, and a clearance in which a shortest distance of the first surface from the first member is the length A1 or more being present on the first surface side of the circuit substrate, and a clearance in which a shortest distance of the second surface from the second member is the length A2 or more being present on the second surface side of the circuit substrate. An oscillation device having a vibrator and a clock control integrated circuit housed in a package; 2. An electronic timepiece characterized by comprising: A circuit substrate having a function of elasticity and having a first surface and a second surface in a front-and-back relationship with the first surface; A first member provided with a plurality of first protruding portions; A second member provided with second protruding portions in opposition to the first protruding portions across the circuit substrate, A third member disposed in opposition to the first surface; and A fourth member disposed in opposition to the second surface, A plurality of holding positions of the circuit substrate being held by the first protruding portions and the second protruding portions, the plurality of holding positions being located at a prescribed distance in an outer side direction from an outer edge of the oscillation device, A length A1 of the first protruding portions, a length A2 of the second protruding portions, and a thickness P1 of the oscillation device being in a relationship of A1 > P1 > A2 > 0, and a clearance in which a shortest distance of the first surface from the third member is the length A1 or more being present on the first surface side of the circuit substrate, and a clearance in which a shortest distance of the second surface from the fourth member is the length A2 or more being present on the second surface side of the circuit substrate.

3. The electronic timepiece according to claim 1 or 2, wherein The plurality of holding positions are provided at least three, and are disposed so that a center of gravity of the oscillation device overlaps with an area connecting the plurality of holding positions.

4. The electronic timepiece according to claim 1 or 2, wherein The second protruding portions and one of the first protruding portions hold a plurality of the holding positions.

5. The electronic timepiece according to claim 1 or 2, wherein The first protruding portions and one of the second protruding portions hold a plurality of the holding positions.

6. The electronic timepiece according to claim 1 or 2, wherein The first member is composed of a plurality of first constituent members, and the first protruding portions are provided to the plurality of first constituent members.

7. The electronic timepiece according to claim 1 or 2, wherein ​ ​ The second component is composed of a plurality of second constituent components, and the second protruding portion is provided to the plurality of second constituent components.

8. The electronic timepiece according to claim 1 or 2, wherein The circuit substrate is a flexible substrate.

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