Electronic device and electronic timepiece

Abstract

The present invention provides an electronic device and an electronic timepiece, the electronic device comprising: a first metal component and a second metal component externally mounted on a case; a first terminal plate electrically connected to the first metal part and the second metal part on the outside of the housing; and a GND function unit which is provided inside the housing and is electrically connected to the first terminal board.

Description

Technical Field

[0001] The invention relates to an electronic device and an electronic clock. Background Art

[0002] Japanese Utility Model Publication No. 53-62675 describes a switch structure in which a conductive path is formed between a button made of conductive material and a wiring pattern formed on a circuit board via a zebra strip connector, and when the button is pressed, the wiring pattern formed on the circuit board and the button are connected via the conductive rubber portion of the zebra strip connector. In addition, there are many electronic devices that are equipped with antennas that can receive GPS signals for the purpose of latest time correction, etc.

[0003] If a conductive component such as metal is mounted outside an electronic device, there is a problem that it affects the antenna sensitivity inside the electronic device. In order to eliminate the influence on the antenna sensitivity, it is required to make the conductive component such as metal and GND conductive so that the potential difference becomes zero.

[0004] However, providing each component with a conductive path connected to GND complicates the structure of the electronic device and imposes greater restrictions on the arrangement of components. Japanese Utility Model Application Laid-Open No. 53-62675 does not mention a structure for connecting multiple conductive components to GND.

[0005] The present invention has been made to improve and solve the problem in this situation, and an object of the present invention is to provide an electronic device and an electronic timepiece that can ensure a unified conduction path to GND even when a plurality of conductive components are provided. Summary of the invention

[0006] In order to solve the above-mentioned problems, the electronic device of the present invention comprises:

[0007] A first metal part and a second metal part are mounted on the housing;

[0008] A first terminal plate electrically connected to the first metal part and the second metal part on the outside of the housing; and

[0009] A GND functional unit is disposed inside the housing and is electrically connected to the first terminal board. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an exploded perspective view of the main parts of the timepiece according to the embodiment.

[0011] Figure 2 yes Figure 1 Front view of the clock shown.

[0012] Figure 3It is along Figure 2 A cross-sectional view of the main parts of the watch taken along line III-III.

[0013] Figure 4 It is along Figure 2 A cross-sectional view of the main parts of the watch taken along line IV-IV.

[0014] Figure 5 is from Figure 2 A side view of the watch as viewed in the direction of arrow V.

[0015] Figure 6 is from Figure 2 A side view of the clock as viewed in the direction of arrow VI.

[0016] Fig. 7A It is along Figure 5 Cross-sectional view of the main parts along line VIIa-VIIa.

[0017] Figure 7B It is along Figure 6 Cross-sectional view of the main parts along line VIIb-VIIb.

[0018] Fig. 8A It is a perspective view of the metal bezel in the embodiment.

[0019] Figure 8B It is an exploded perspective view of the main parts of the metal button part of the embodiment.

[0020] Figure 8C yes Figure 8B A perspective view of the metal button tube shown.

[0021] Fig.8D It is a perspective view of the external terminal plate in the embodiment.

[0022] Fig. 9 yes Figure 3 An enlarged cross-sectional view of portion IX surrounded by a single-dot chain line.

[0023] Fig. 10A is Fig. 7A The enlarged cross-sectional view of the X portion surrounded by the one-dot chain line in FIG. 1 shows a state where no load is applied to the metal bezel.

[0024] Fig. 10B is Fig. 7A The enlarged cross-sectional view of the X portion surrounded by the one-dot chain line in FIG. 1 shows a state where a load is applied to the metal bezel.

[0025] Fig.11 It is a top view of the rear cover member of the embodiment.

[0026] Fig.12 yes Fig.11 An exploded perspective view of the main parts of the rear cover component is shown.

[0027] Fig.13 It is a perspective view of the main parts of the piezoelectric sound generating unit in the embodiment.

[0028] Fig.14 is along Fig.11 A cross-sectional view of the main parts of the rear cover component taken along line XIV-XIV.

[0029] Fig.15 It is a perspective view of the internal terminal plate in the embodiment.

[0030] Fig.16 is Figure 4 An enlarged cross-sectional view of the XVI portion surrounded by a single-dot chain line.

[0031] Fig.17 It means that Fig.16 The parts shown are the same as those shown in the enlarged cross-sectional view of an example of an internal terminal plate to which a modified example is applied. DETAILED DESCRIPTION

[0032] With reference to the accompanying drawings, an embodiment of the electronic device (electronic timepiece) of the present invention is described. In this embodiment, the electronic device (electronic timepiece) is a wristwatch worn on the wrist of a user (hereinafter referred to as "timepiece 100") for use. In addition, in the embodiments described below, various technically preferred limitations are added for the implementation of the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0033] [structure]

[0034] Figure 1 1 is an exploded perspective view of the main parts of a timepiece as an electronic device (electronic timepiece) in this embodiment. Figure 2 yes Figure 1 The main part of the clock is shown in the front view. Figure 3 It is along Figure 2 A cross-sectional view of the main parts of the watch along line III-III, Figure 4 It is along Figure 2 A cross-sectional view of the main parts of the watch taken along line IV-IV.

[0035] in addition, Figure 5 is from Figure 2 This is a side view of the clock at 9 o'clock as viewed in the direction of arrow V. Figure 6 is from Figure 2 A side view of the 3 o'clock side of the clock as viewed in the direction of arrow VI.

[0036] like Figure 1As shown, a clock 100 as an electronic device (electronic clock) in this embodiment has a housing 1. The housing 1 of this embodiment is formed in a hollow short column shape with upper and lower openings, and the hollow portion inside constitutes a storage space for storing various parts. The housing 1 is formed of a relatively hard synthetic resin such as engineering plastics, super engineering plastics, etc. In addition, the material forming the housing 1 is not limited to the materials exemplified here.

[0037] A pair of strap attachment portions 11 for attaching a strap (not shown) are provided at the 12 o'clock position and the 6 o'clock position in the analog timepiece on the outer side surface of the housing 1. In addition, as described later, in the timepiece 100 of this embodiment, metal buttons 7 are provided at the 2 o'clock position, the 4 o'clock position, the 8 o'clock position, the 9 o'clock position, and the 10 o'clock position in the analog timepiece. A through hole 17 is formed on the outer side surface of the housing 1 and at a position corresponding to the metal button 7, through which a shaft portion 72 of the metal button 7 described later is inserted.

[0038] like Figure 3 as well as Figure 4 As shown, the surface side of the case 1 (the visual confirmation side of the watch, in Figure 3 as well as Figure 4 The opening portion (upper side in the figure) is closed by the windproof member 14. The windproof member 14 is a transparent member (cover member) formed of, for example, a glass material, a transparent resin material, etc., and is fixed to the housing 1 by, for example, bonding. A transparent or translucent solar panel 15 is overlapped on the windproof member 14 and is provided integrally with the windproof member 14 by, for example, bonding (see Figure 3 as well as Figure 4 ) In addition, the shape, arrangement position, etc. of the solar panel 15 are not limited to the example shown in the figure.

[0039] The back side of the case 1 (the non-visual confirmation side of the watch, Figure 3 as well as Figure 4 The opening portion (lower side in the middle) is closed by the rear cover member 3. In addition, the rear cover member 3 can also be formed integrally with the housing 1. The rear cover member 3 is formed of a hard resin such as carbon or a metal resin. As a result, the rear cover member 3 can have high strength and is almost not affected even by impact.

[0040] In this embodiment, the back side end surface of the housing 1 has a recessed portion 16 (see FIG. 1 ) in which a waterproof member such as a waterproof ring (not shown) is disposed. Fig. 9 ), the back cover member 3 is mounted on the housing 1 via a waterproof member by screws not shown. By mounting the back cover member 3 via the waterproof member, the opening on the back side (non-visual confirmation side of the watch) of the housing 1 can be sealed while ensuring the waterproofness (airtightness) of the housing 1.

[0041] In this embodiment, a piezoelectric sound generating unit 4 is arranged inside the rear cover member 3 (see Fig.11 as well as Fig.12 The piezoelectric sound generating unit 4 generates a buzzing sound (ringing a buzzer) to make various notifications to the user, etc., and is a single piezoelectric chip structure in which a piezoelectric body 41 is bonded to a vibration plate 42. The vibration plate 42 is a metal plate member (metal plate) such as stainless steel (SUS), and as described later, is a metal plate that functions as a GND (also referred to as a "GND function unit"). The piezoelectric sound generating unit 4 is, for example, bonded to a double-sided tape 45 (see Fig.12 ) is attached to the inner side of the rear cover member 3 and connected to a circuit board (not shown). In addition, the vibration plate 42 is not limited to stainless steel (SUS), and may also be brass or nickel.

[0042] Although detailed illustration and description are omitted, a control unit, an operating unit, a battery, and the like of a timepiece 100 as an electronic device are accommodated inside the case 1 (the aforementioned storage space).

[0043] The action unit is a structural unit used for the clock 100 to perform various displays, such as Figure 1 In the examples, the case where the watch 100 is a digital display method with a display unit 12 including a liquid crystal display panel or the like as an operating unit is illustrated. In addition, the operating unit is not limited to the display unit 12 including a liquid crystal display panel or the like. For example, when the watch 100 is an analog display method, as the operating unit, a pointer, a gear train (gear train mechanism) for rotating the pointer, a driving unit (motor, etc.) and the like are provided instead of the above-mentioned structures. In addition, the watch 100 may also be a hybrid type having both digital and analog methods, in which case the structural parts of both are provided as the operating unit.

[0044] The control unit is mounted on a circuit board (not shown) or the like, and controls display operations and the like performed by the operation unit.

[0045] In addition, an antenna 13 is disposed inside the housing 1. Figure 1 In the example shown, the antenna 13 is formed in a substantially annular shape and is disposed on the lower side of the windproof member 14 described above (see Figure 3 as well as Figure 4 ). In addition, the shape of the antenna 13, the position where the antenna 13 is set, etc. are not limited to the example in the figure. In the present embodiment, the antenna 13 is, for example, a GPS antenna capable of receiving GNSS (GPS / GLONASS / QZSS / SBAS) signals transmitted from GPS satellites (including multiple types such as GLONASS in addition to GPS, but hereinafter referred to as "GPS") satellites.

[0046] GPS satellites carry atomic clocks and transmit data including time information of the atomic clocks. By receiving GNSS (GPS) signals transmitted from GPS satellites via antenna 13, extremely high-precision time information can be obtained at any receiving location on the ground.

[0047] In addition, if Figures 1 to 6 As shown, a buffer bezel 5 is provided on the outer side of the case 1 in this embodiment. The buffer bezel 5 is a buffer component that covers substantially the entire side area of ​​the case 1. Specifically, the buffer bezel 5 is provided in a manner that surrounds the opening portion of the surface side (visual confirmation side of the watch) of the case 1, and covers substantially the entire side surface of the case 1.

[0048] The buffer bezel 5 is provided with a covering portion 51 at a position corresponding to the band mounting portion 11 of the housing 1 so as to cover the band mounting portion 11. In addition, the buffer bezel 5 is provided with an insertion hole 52 that penetrates inside and outside corresponding to the position where the metal button 7 described later is mounted. The material forming the buffer bezel 5 is not particularly limited, and it can be formed of a resin such as polyurethane, for example. In addition, the buffer bezel 5 can be formed of a material that has a buffering effect and can be restored to its original shape even when it is pressed and deformed, and is not limited to being formed of a resin such as polyurethane.

[0049] In addition, a plurality of metal parts made of metal material are mounted outside the housing 1. In this embodiment, the metal parts include a metal bezel 6, a metal button 7, and a metal button tube 75.

[0050] Configured on Figure 1 Any one of the metal bezel 6, the metal button 7, and the metal button tube 75 on the 3 o'clock side shown is a first metal part, and any one of the other metal parts different from the first metal part is a second metal part. Figure 1 The external terminal plate 8 on the three-point side shown and electrically connected to the first metal part and the second metal part is a first terminal plate.

[0051] Next, configure Figure 1 Any one of the metal bezel 6, the metal button 7, and the metal button tube 75 at the 9 o'clock side shown is a third metal part, and any one of the other metal parts different from the third metal part is a fourth metal part. Figure 1 The external terminal plate 8 shown at the 9 o'clock side and electrically connected to the third metal part and the fourth metal part is a second terminal plate.

[0052] like Figure 2 , Figures 5 to 7A , Figure 7BAs shown, the metal bezel 6 is provided on the side of the case 1 at the 3 o'clock side and the 9 o'clock side of the analog watch in a manner covered from the outside of the buffer bezel 5. By partially configuring the metal bezel 6 from the outside of the buffer bezel 5, the appearance design of the watch 100 is improved and a sense of luxury can be expressed. In addition, the specific shape of the metal bezel 6, the position and range of configuring the metal bezel 6, etc. are not limited to the example shown in the figure, and the metal bezel 6 can also be configured over a wider range.

[0053] Fig. 8A This is a three-dimensional diagram showing a metal bezel. Fig. 8A , a metal bezel 6 disposed on the 3 o'clock side of an analog clock is shown as an example. In the example shown, the metal bezel 6 is screwed at two locations, and screw holes 61 are formed at the screwed locations.

[0054] As will be described later, the metal bezel 6 of this embodiment is fixed by stepped screws 63 (see Fig. 10A as well as Fig. 10B ) is fixed to the housing 1. Fig. 8A As shown, a contact surface 62 against which a first step portion 632 of a stepped screw 63 contacts is provided in a threaded hole 61 formed in the metal bezel 6 .

[0055] In the timepiece 100 of this embodiment, metal buttons 7 are provided at 2 o'clock, 4 o'clock, 8 o'clock, 9 o'clock, and 10 o'clock in the analog timepiece. A metal button tube 75 as a metal part is provided on the outer periphery of each metal button 7.

[0056] Figure 8B This is an exploded perspective view of a metal button. Figure 8C This is a three-dimensional diagram of a metal button tube. Figure 8B As shown in FIG. 1 , the metal button 7 includes a button head 71 and a shaft 72. The button head 71 is a portion exposed to the outside of the timepiece 100 and receives user operation. The shaft 72 is connected to the button head 71 at one end and is inserted into the insertion hole 77 of the metal button tube 75 (see FIG. 1 ) in a state where the other end is inserted into the coil spring member 73. Figure 8C ). Moreover, the other end side of the shaft portion 72 is inserted into the housing 1 via the insertion hole 52 of the buffer bezel 5 and the through hole 17 of the housing 1. In this embodiment, in addition to the metal button tube 75, the button head 71 and the shaft portion 72 are also metal parts formed of metal materials.

[0057] like Figure 8CAs shown in FIG. 1 , the metal button tube 75 is a substantially cylindrical member with a bottom, and has an insertion hole 77 substantially in the center of the bottom. Around the insertion hole 77, a cylindrical portion 76 substantially concentric with the insertion hole 77 when viewed from above is erected from the bottom inside the metal button tube 75. When the shaft portion 72 of the metal button 7 is inserted into the insertion hole 77, one end side of the coil spring member 73 is arranged in the cylindrical portion 76. On the back side of the button head 71 of the metal button 7, a recessed portion 711 is formed around the shaft portion 72 (see FIG. 1 ). Fig. 9 The other end side of the coil spring member 73 is arranged in the recessed portion 711. Thus, the button head 71 of the metal button 7 and the metal button tube 75 are connected via the coil spring member 73 and are conducted.

[0058] In addition, a threaded hole 78 is formed at the bottom of the metal button tube 75 near the insertion hole 77. Figure 1 As shown, a positioning pin is formed on the housing 1 on the rear cover member 3 side relative to the through hole 17. Therefore, before the screw 74 as a fastening member is inserted into the threaded hole 78, the positioning pin formed on the housing 1 is inserted into one of the two threaded holes 78 of the metal button tube 75, and the metal button tube 75 is fastened to the housing 1 by inserting the screw 74 as a fastening member into the threaded hole 78.

[0059] Furthermore, the watch 100 has a terminal board (hereinafter referred to as "external terminal board 8") connected to a plurality of metal parts on the outside of the case 1, and the metal bezel 6 and the metal button tube 75 as the plurality of metal parts are mounted on the case 1 via the external terminal board 8. Specifically, the metal bezel 6 and the metal button tube 75 are appropriately arranged from the outside of the buffer bezel 5 mounted in a manner covering the outside of the case 1 via the external terminal board 8, and are fastened to the case 1 by fastening components (the step screw 63 as the fastening component for fastening the metal bezel 6 and the screw 74 as the fastening component for fastening the metal button tube 75).

[0060] The external terminal plate 8 is formed of a metal material such as Fig.8D As shown, there are a part receiving portion 81 which is a planar portion receiving the metal bezel 6 and the metal button tube 75, and a connecting arm portion 82 which connects the part receiving portions 81 to each other. The part receiving portion 81 is provided with a threaded hole 83 through which the stepped screw 63 for fixing the metal bezel 6 and the screw 74 for fixing the metal button tube 75 are inserted.

[0061] The step screw 63 and the screw 74 fix the metal bezel 6 and the metal button tube 75 to the housing 1 via the external terminal board 8. That is, the metal bezel 6 and the metal button tube 75 are both fastened to the housing 1 together with the external terminal board 8. By fastening the metal bezel 6 and the metal button tube 75, which are multiple metal parts, to the external terminal board 8, the parts fastened via the same external terminal board 8 (that is, the metal bezel 6 and the metal button tube 75) are also connected to each other via the external terminal board 8. In addition, in the present embodiment, as described above, the button head 71 of the metal button 7 and the metal button tube 75 are also in contact via the coil spring component 73. Therefore, in the case where the button head 71 is also a metal part formed of a metal material, the button head 71 also achieves conduction with other metal parts fastened via the same external terminal board 8. In this way, the metal button 7 is electrically connected to the external terminal board 8 via the coil spring component 73 and the metal button tube 75.

[0062] Along the Figure 2 The cross-sectional view of line III-III is Figure 3 In the figure, the metal buttons 7 at the 4 o'clock position and the 10 o'clock position are surrounded by a single dotted line to indicate that Figure 2 The cross-sectional view of the IV-IV line is Figure 4 In the figure, the metal buttons 7 at the 2 o'clock position and the 8 o'clock position are surrounded by a single-dot chain line. The metal buttons 7 and their surroundings surrounded by a single-dot chain line in each figure are substantially the same. Fig. 9 is one of them Figure 3 FIG. 1 is an enlarged cross-sectional view of a main part of the IX portion surrounded by a single-dot chain line.

[0063] Fig. 9 The metal button 7 shown in the figure is a button that is operated by the user pressing the button head 71 and the shaft 72 being pressed in, and the button head 71 can move along the axis of the shaft 72 in the metal button tube 75. As described above, the coil spring member 73 is arranged between the button head 71 and the metal button tube 75, so when the button head 71 is pressed, the coil spring member 73 is compressed. And when the pressing force is released, the button head 71 is pushed back by the restoring force of the coil spring member 73 and returns to the original position.

[0064] like Fig. 9 As shown, a groove 721 is formed in the portion of the shaft 72 inserted into the housing 1, and a waterproof ring 722 is installed in the groove 721. The number, shape, and arrangement of the waterproof ring 722 are not limited to the example shown in the figure. The outer peripheral surfaces of the waterproof ring 722 are pressed against the inner peripheral surface of the through hole 17 formed in the housing 1, and slide in the through hole 17 according to the operation of the metal button 7. Thus, waterproofing between the shaft 72 and the through hole 17 is achieved.

[0065] In addition, a groove portion 723 is formed around the shaft near the front end of the shaft portion 72. When the shaft portion 72 is inserted into the through hole 17, it is arranged to protrude into the housing 1 at least closer to the front end than the groove portion 723. An anti-slip component 79 is mounted on the groove portion 723. The shape of the anti-slip component 79 is not limited to the example shown in the figure, and for example, an anti-slip component 79 such as an E-shaped ring embedded in the groove portion 723 is applied.

[0066] The anti-slip component 79 embedded in the groove 723 abuts against the inner peripheral surface of the housing 1 in a contactable and detachable manner. The anti-slip component 79 abuts against the inner peripheral surface of the housing 1, thereby constituting the shaft 72 of the metal button 7 so that the portion closer to the front end side than the groove 723 to which the anti-slip component 79 is installed will not slip out of the housing 1.

[0067] As described above, the metal button tube 75 is fastened to the housing 1 together with the external terminal board 8 by screws 74 while the external terminal board 8 is sandwiched between the metal button tube 75 and the outer peripheral surface of the housing 1. Fig. 9 In the cross section shown, only the component receiving portion 81 of the external terminal plate 8 appears. However, as described above, the external terminal plate 8 is connected to a plurality of metal components by connecting a plurality of component receiving portions 81 via the connecting arm portion 82 .

[0068] One end side of the internal terminal plate 9 described later contacts a portion of the shaft portion 72 of the metal button 7 closer to the front end side than the groove portion 723. As described above, a plurality of metal parts ( Figure 1 The metal bezel 6, metal button 7 and metal button tube 75 in the embodiment are connected to the external terminal board 8. Multiple metal parts ( Figure 1 Any one of the metal bezel 6, metal button 7, and metal button tube 75 is electrically connected to the internal terminal plate 9 (directly or indirectly in contact). When the other end side of the internal terminal plate 9 is in contact with the vibration plate 42 as the GND function part, the multiple metal parts ( Figure 1 The metal bezel 6, metal button 7, and metal button tube 75 in the back cover are all connected to GND, and the potential difference with GND becomes zero. When the back cover member 3 (even if it contains carbon) is resin, the GND function part is the metal vibration plate 42. However, when the back cover member 3 is metal, the GND function part can also be the back cover member 3. In addition, the structure in which the metal button 7 including the metal button tube 75 as a metal part indirectly contacts the vibration plate 42 as the GND function part will be described in detail later.

[0069] In addition, in the timepiece 100 of this embodiment, Figure 2As shown in FIG. 1 , the metal bezel 6 is provided on the outermost side at the 3 o'clock side and the 9 o'clock side. Therefore, although the appearance design is excellent, if a large impact is applied from the 3 o'clock side and the 9 o'clock side due to the fall of the timepiece 100, the impact directly acts on the case 1 and various precision parts inside the case, which may have a negative impact. Therefore, in this embodiment, the following impact absorbing structure is provided at the portion where the metal bezel 6 is provided.

[0070] Fig. 10A as well as Fig. 10B is Fig. 7A The enlarged cross-sectional view of the X portion surrounded by the single-point dashed line in FIG. In addition, the impact absorption structure in the portion where the metal bezel 6 is provided is on the 3-point side (i.e. Figure 7B The structure of the metal button 7 provided with the metal bezel 6 is the same as that of the case 1 except that the shaft 72 is inserted into the insertion hole 67 of the metal bezel 6 instead of the insertion hole 77 of the metal button tube 75 and inserted into the case 1. Fig. 9 The structures to be described are the same, so the illustrations are stopped here and the description is omitted.

[0071] Fig. 10A Indicates a state where no load is applied to the metal bezel. As described above, the metal bezel 6 is fastened to the housing 1 by the step screw 63. Specifically, a contact surface 62 is provided in the threaded hole 61 of the metal bezel 6 for the first step portion 632 of the step screw 63 to abut against. When the step screw 63 is tightened, the lower side surface of the first step portion 632 (at Fig. 10A The right side of the surface) and the upper surface of the abutment surface 62 (in Fig. 10A Thus, the metal bezel 6 and the stepped screw 63 are in conduction.

[0072] In addition, the second step portion 633 of the step screw 63 contacts the external terminal plate 8 (the part receiving portion 81 of the external terminal plate 8). The step screw 63, while sandwiching the external terminal plate 8 (the part receiving portion 81 of the external terminal plate 8) between the metal bezel 6 and the housing 1, fastens the metal bezel 6 and the external terminal plate 8 to the housing 1 together as a fastening member.

[0073] In this embodiment, a buffer bezel 5 as a buffer member is arranged between the housing 1 and the metal bezel 6. Fig. 10A As shown in FIG. 1 , the thickness of the buffer bezel 5 in a state where no load is applied to the metal bezel 6 is defined as “thickness t1”. In addition, at this time, a gap C is provided between the metal bezel 6 as an exterior component and the case 1 as a movable space capable of absorbing the displacement of the metal bezel 6. The “thickness t1” of the buffer bezel 5 and the gap C as the movable space are matters that can be appropriately set.

[0074] In contrast, Fig. 10B Indicates a state where a load is applied to the metal bezel. When an impact is applied to the metal bezel 6 as an exterior component due to the fall of the timepiece 100, the metal bezel 6 is pressed toward the case 1 and displaced. At this time, the metal bezel 6 can move by the amount of the gap C, and the buffer bezel 5 is flattened by the amount of movement of the metal bezel 6. Therefore, in a state where a load is applied to the metal bezel 6, the thickness of the buffer bezel 5 becomes "thickness t2" which is thinner than the "thickness t1" when no load is applied. In addition, the gap C becomes smaller according to the amount of movement of the metal bezel 6. In the example shown in the figure, a state where the metal bezel 6 moves to the extent that the gap C almost disappears is shown.

[0075] When the metal bezel 6 is displaced toward the case 1, the contact surface 62 of the metal bezel 6 is separated from the first step portion 632 of the step screw 63. Therefore, during the separation, the metal bezel 6 is in a state of being unable to conduct, but if the load applied to the metal bezel 6 is stopped (that is, if the impact disappears), the buffer bezel 5 returns to its original shape. As a result, the metal bezel 6 is pushed up to its original position, and the first step portion 632 of the step screw 63 contacts the contact surface 62 of the metal bezel 6 again, and the conduction state is restored.

[0076] in addition, Fig.11 is a top view of a rear cover member of an embodiment, Fig.12 yes Fig.11 As described above, the piezoelectric sound generating unit 4 is attached to the inner side of the rear cover member 3 by means of a double-sided tape 45 or the like.

[0077] Fig.13 4 is a perspective view of the main parts of the piezoelectric sound generating unit. In this embodiment, the vibration plate 42 of the piezoelectric sound generating unit 4 is a metal plate (GND function part) that functions as a GND. Fig.13 As shown, the vibration plate 42 has a spring-shaped portion 43 in all or part of a position corresponding to the internal terminal plate 9 .

[0078] The spring-shaped portion 43 is a component formed into a leaf spring shape by bending a portion of the vibration plate 42 toward the back side into a substantially L-shaped shape. An elastic body 44 is arranged on the back side of the spring-shaped portion 43 (between the rear cover member 3 and the spring-shaped portion 43). The elastic body 44 is an auxiliary component that generates a necessary load on the spring-shaped portion 43.

[0079] That is, the spring-shaped portion 43 is provided to stably receive the end of the internal terminal plate 9 when the internal terminal plate 9 is arranged. The elastic body 44 ensures the necessary contact pressure and stabilizes the contact resistance with the internal terminal plate 9.

[0080] The elastic body 44 is attached to the back of the spring-shaped portion 43 by double-sided tape or the like. As the elastic body 44, it is preferred to use a high-function polyurethane foam such as a microporous polymer sheet (e.g., "PORON" (registered trademark) manufactured by ROGERS INOAC CORPORATION, etc.). In addition, the material of the elastic body 44 is not particularly limited as long as it can stabilize the load of the spring-shaped portion 43. For example, the elastic body 44 may also be a coil spring or the like.

[0081] Fig.14 It is along Fig.11 A cross-sectional view of the main parts of the rear cover taken along line XIV-XIV.

[0082] like Fig.14 As shown in the figures, a recess 31 for arranging an elastic body 44 is formed on the inner side surface of the rear cover member 3 at a position corresponding to the spring-shaped portion 43. The elastic body 44 is provided on the back side of the spring-shaped portion 43 so that the elastic body 44 is stably arranged.

[0083] In addition, the spring-shaped portions 43 are preferably provided corresponding to the positions of the metal buttons 7. Thus, the internal terminal plate 9 in contact with the shaft portion 72 of each metal button 7 can be reliably brought into contact with the vibration plate 42 as a GND function portion to provide electrical conduction.

[0084] However, although the internal terminal plate 9 is provided corresponding to the metal button 7 , the spring-shaped portion 43 may not be provided at a position corresponding to the internal terminal plate 9 due to the arrangement of various parts accommodated in the housing 1 .

[0085] In this regard, in the present embodiment, a plurality of metal parts (metal bezel 6, metal button tube 75) are connected to one external terminal board 8, and are fastened together with respect to the housing 1. Therefore, for example, even if there is a portion where the spring-shaped portion 43 cannot be arranged at a position corresponding to the internal terminal board 9, as long as any one of the internal terminal boards 9 corresponding to other metal parts connected to the same external terminal board 8 is reliably connected to the vibration plate 42, all metal parts connected to the external terminal board 8 can be made conductive with the vibration plate 42 as the GND function portion, and the potential difference with the GND can be made zero.

[0086] In the clock 100 of this embodiment, five metal buttons 7 are provided, and internal terminal plates 9 are provided correspondingly to each of them. Fig.12 as well as Fig.13 , a case where the spring-shaped portions 43 are provided at four locations of the vibration plate 42 corresponding to the four internal terminal plates 9 is exemplified.

[0087] Fig.15 It is a perspective view of the internal terminal plate in the embodiment.

[0088] The internal terminal plate 9 connects and conducts the metal bezel 6 and the metal button tube 75 as metal parts and the vibration plate 42 which is a metal plate functioning as GND.

[0089] like Fig.15 As shown, the internal terminal plate 9 of the present embodiment has a first portion 91 connected to the metal part, and a first portion 91 extending from the lower end side of the first portion 91 in the first direction α (refer to Fig.16 ) The second curved portion 92 is formed into a substantially L-shaped shape when viewed from the side. Fig.16 As shown, in this embodiment, the first direction α is a direction from the inside to the outside of the housing 1 .

[0090] A bent portion 911 is formed at the upper end portion (free end portion) of the first portion 91, and receives the front end portion of the shaft portion 72 of the metal button 7 and contacts it. In addition, the second portion 92 is in surface contact with the vibration plate 42 (specifically, the spring-shaped portion 43 formed integrally with the vibration plate 42) as a metal plate. At this time, at the portion where the spring-shaped portion 43 is provided, the spring-shaped portion 43 is pushed up by the elastic body 44, so that the contact is made in a manner that caters to the second portion 92 from the vibration plate 42 side, and the internal terminal plate 9 and the vibration plate 42 can be stably contacted. In addition, a double-sided tape 94 is arranged at the first portion 91 of the internal terminal plate 9, and the first portion 91 of the internal terminal plate 9 is adhered to the housing 1 via the double-sided tape 94.

[0091] In particular, the vibration plate 42 of the piezoelectric sound unit 4 is relatively thin for the purpose of vibrating the piezoelectric body 41, and it is difficult to generate the required load by only providing the spring-shaped portion 43 in the shape of a leaf spring. Furthermore, when the piezoelectric sound unit 4 is provided on the rear cover member 3 as in the present embodiment, poor contact is easily caused by repeated opening and closing actions. In addition, even if contact is made and conduction is achieved, the contact resistance value is unstable (easy to change). In this regard, by adopting a structure in which an elastic body 44 is provided on the back side of the spring-shaped portion 43 and the elastic body 44 is used to push up, the necessary contact pressure with the internal terminal plate 9 can be ensured, and the internal terminal plate 9 and the vibration plate 42 can be reliably conducted. In addition, even if the opening and closing actions are repeated, the spring-shaped portion 43 is not easily worn, and a stable contact resistance can be maintained for a long time. As a result, the resistance value of GND can be stabilized, and GND reinforcement can be achieved.

[0092] In addition, the internal terminal plate 9 in the embodiment has a structure in which the lower end side of the first portion 91 is directed in a second direction β (see Fig.16 ) The second portion 92 is formed by bending from the lower end side of the bending portion 93 toward the first direction α.

[0093] By temporarily bending the internal terminal plate 9 in the second direction β, and then bulging in the inner direction of the housing 1 and then bending in the first direction α to form the second portion 92, the length of the second portion 92 in the first direction α can be obtained. Therefore, even if the bend R in the first direction α is taken into consideration, the length of the second portion 92 can be sufficiently ensured, and the contact area between the internal terminal plate 9 and the vibration plate 42 can be expanded to achieve more stable contact and conduction.

[0094] In addition, the structure of the internal terminal plate 9 is not limited to the structure exemplified here. For example, the internal terminal plate may not have the bent portion 93 bent in the second direction β, but may have a Fig.17 As shown, the internal terminal plate 9a is composed of a first portion 91a and a second portion 92a bent from the lower end side of the first portion 91a in the first direction α and formed in a substantially L-shape in side view.

[0095] In this case, the internal terminal plate 9a is also bent in the first direction α at the lower end side of the first portion 91a to form the second portion 92a, so that at the bending angle between the first portion 91a and the second portion 92a, an R shape (bend R) is formed by sheet metal processing, i.e., bending processing, which utilizes the ductility of the metal. Therefore, the internal terminal plate 9a is separated from the housing 1 by a distance corresponding to the bend R, but the double-sided tape 94 for attaching the first portion 91a to the housing 1 has a thickness, so that the gap corresponding to the bend R between the first portion 91a and the housing 1 is filled.

[0096] Fig.16 is Figure 4 An enlarged cross-sectional view of the XVI portion surrounded by a single-dot chain line.

[0097] like Fig.16 As shown, the first portion 91 of the internal terminal plate 9 is arranged at a position in contact with the front end side of the shaft portion 72 of the metal button 7. In addition, the internal terminal plate 9 is first bent in the second direction β at the lower end side, and then bent in the first direction α to form a second portion 92, and the second portion 92 is in surface contact with the vibration plate 42 (the spring-shaped portion 43 of the vibration plate 42). More specifically, the second portion 92 is in surface contact with the spring-shaped portion 43 formed integrally with the vibration plate 42. As a result, the internal terminal plate 9 is stably connected to the vibration plate 42 as a metal plate.

[0098] The shaft 72 of the metal button 7 is in direct or indirect contact with the metal button tube 75 as a metal part, and by making the internal terminal plate 9 in contact with the shaft 72 contact with the vibration plate 42 that functions as the GND, the metal button tube 75 and a plurality of metal parts connected to the external terminal plate 8 in the same manner as the metal button tube 75 can ensure a conduction path to the GND and can be uniformly conducted to the GND. Thus, the GND can be strengthened.

[0099] In addition, the housing 1 has a recess 16 on the rear side end surface for arranging a waterproof member. Fig.16 As shown, the internal terminal plate 9 and the metal plate vibration plate 42 are arranged in a region not overlapping the recess 16 (region inside the housing 1 relative to the recess 16). Therefore, the waterproofness between the rear cover member 3 and the housing 1 is not impaired.

[0100] [effect]

[0101] When assembling the timepiece 100 of the present embodiment, the movement is housed in the case 1 and the opening portion on the visual confirmation side is closed with the windproof member 14. In addition, the buffer bezel 5 is arranged in a manner covering the outer side of the case 1, and the metal bezel 6 and the metal button tube 75 (the metal button 7 assembled to the metal button tube 75) as metal parts are installed from the outside thereof via the external terminal plate 8. At this time, the metal bezel 6 is mounted on the case 1 by the stepped screw 63, and the metal button tube 75 is mounted on the case 1 by the screw 74. In this way, the external terminal plate 8 and the multiple metal parts are fastened to the case 1 together by threading while the external terminal plate 8 is sandwiched between the multiple metal parts and the case 1.

[0102] The shaft portion 72 of the metal button 7 inserted into the insertion hole 77 of the metal button tube 75 is inserted into the through hole 17 of the housing 1, and the front end portion is arranged inside the housing 1. The anti-drop component 79 is installed at the front end portion of the shaft portion 72 arranged inside the housing 1 to prevent the shaft portion 72 from falling out of the housing 1. In addition, the internal terminal board 9 is arranged in a manner that the first portion 91 contacts the front end portion of the shaft portion 72.

[0103] When installing the parts of each part, the opening part on the non-visual confirmation side is closed by the back cover part 3. At this time, a prevention component is arranged in the recess 16 of the housing 1 to ensure waterproofing between the back cover part 3 and the housing 1, and the back cover part 3 is screwed to the housing 1. When the back cover part 3 is installed, the spring-shaped part 43 of the vibration plate 42 is arranged below the second part 92 of the internal terminal plate 9, and the second part 92 of the internal terminal plate 9 and the spring-shaped part 43 pushed up by the elastic body 44 are reliably contacted and conducted with each other by the surface. By contacting with the surface in this way, stable contact and conduction can be achieved without being affected by positional deviation, etc.

[0104] In addition, even in the part where the spring-shaped part 43 is not provided, there is a case where the load is unstable and it is difficult to reliably conduct with the GND, but a plurality of metal parts are fastened together with the external terminal board 8 outside the housing 1 and are mutually conducted. Therefore, as long as one of the plurality of metal parts in contact with one external terminal board 8 contacts the spring-shaped part 43, all the metal parts in contact with the external terminal board 8 can be made to conduct with the GND together, and the GND can be strengthened.

[0105] Thus, a conductive path is ensured from the plurality of external metal parts (metal bezel 6, metal button 7, metal button tube 75, etc.) to the GND (vibration plate 42 functioning as GND) inside the housing 1, and the plurality of metal parts can be reliably connected to the GND. Furthermore, by making the metal parts conductive to the GND, the sensitivity (performance) of the antenna 13 provided inside the timepiece 100 can be prevented from being affected by the metal parts, and a highly reliable timepiece 100 for time correction using the antenna 13 can be realized.

[0106] In addition, the metal bezel 6 as an exterior component is mounted on the housing 1 using a stepped screw 63, and a gap C is provided between the metal bezel 6 and the housing 1 as a movable space to allow the metal bezel 6 to move, so that even if the metal bezel 6 is pressed in due to an impact such as falling, the displacement can be absorbed in the gap C, and the impact can be absorbed / mitigated by arranging a buffer bezel 5 as a buffer component between the metal bezel 6 and the housing 1. Therefore, it is not necessary to add various additives to the housing 1 itself for reinforcement, and there is no influence of the additives on the antenna performance.

[0107] [Effect]

[0108] As described above, the watch 100 as an electronic device in this embodiment has: a plurality of metal parts, which are the first metal parts and the second metal parts externally mounted on the housing 1; an external terminal plate 8, which is a first terminal plate electrically connected to these first metal parts and the second metal parts on the outside of the housing 1; and a vibration plate 42 as a GND function part, which is arranged inside the housing 1 and electrically connected to the external terminal plate 8. Thus, even when a plurality of metal parts as conductive components are externally mounted on the housing 1, a conductive path from all metal parts to the vibration plate 42 serving as GND can be ensured, and the metal parts can be concentrated in a state where there is no potential difference with GND. Therefore, the influence on the precision equipment inside the electronic device such as the watch 100 can be suppressed with a relatively simple structure.

[0109] In particular, when the clock 100 is configured as in the present embodiment, a high-end appearance design can be realized by attaching various metal parts to the exterior. Moreover, a high-end appearance can be realized, and the sensitivity (performance) of the internal antenna can be avoided, and high-precision radio wave reception and accurate time correction based on the received radio waves can be realized.

[0110] In addition, a third metal part and a fourth metal part different from the first metal part and the second metal part may be installed outside the shell 1. In this case, a second terminal board (external terminal board 8) electrically connected to the third metal part and the fourth metal part is provided on the outside of the shell, and the GND functional part is also electrically connected to the second terminal board.

[0111] For example, when the first metal part, the second metal part, and the first terminal plate are arranged at the 3 o'clock side of the timepiece 100, and the third metal part, the fourth metal part, and the second terminal plate are arranged at the 9 o'clock side of the timepiece 100, the conductive paths from the metal parts to the vibration plate 42 functioning as the GND can be ensured, and all the external metal parts can be set to a state where there is no potential difference with the GND. Thus, a high-end appearance design can be achieved while avoiding the influence on the precision equipment inside the device.

[0112] In addition, in the present embodiment, the plurality of metal parts (the first metal part and the second metal part) include the metal bezel 6, the metal button 7, and the metal button tube 75. Thus, a high-end appearance design can be realized by configuring metal parts such as the metal bezel 6, the metal button 7, and the metal button tube 75 on the exterior. Moreover, the metal parts can be gathered together to form a state where there is no potential difference with GND while showing a high-end appearance, and a state can be formed that does not affect the internal devices.

[0113] In addition, in the present embodiment, the metal bezel 6 and the metal button tube 75 among the plurality of metal parts are mounted to the housing 1 via the external terminal board 8 by means of the screws 74 and the stepped screws 63 as fastening members. Thus, as for the metal parts connected to the same external terminal board 8, as long as one of them can be stably connected to the GND, they can be concentrated to the GND, and the number of parts can be reduced and a simple structure can be achieved.

[0114] In addition, in the present embodiment, the metal button 7 includes a button head 71 and a shaft 72 having one end connected to the button head 71 and the other end inserted into the coil spring member 73, and the metal button 7 is electrically connected to the external terminal board 8 (first terminal board, second terminal board) via the coil spring member 73 and the metal button tube 75. Thus, even without adding special parts, the electrical connection between the metal button 7 and the external terminal board 8 can be achieved by parts generally provided in the metal button 7.

[0115] In addition, in the present embodiment, an antenna 13 is provided in the housing 1. If a conductive component such as metal is mounted on the outside of an electronic device such as the timepiece 100, the antenna sensitivity of the antenna 13 in the electronic device will be affected. In order to eliminate the influence on the antenna sensitivity, it is necessary to connect the conductive component such as metal to GND so that the potential difference becomes zero.

[0116] In this regard, in the present embodiment, by providing an external terminal board 8 connected to a plurality of metal parts, even if a separate conduction path is not ensured for each part, a plurality of metal parts can be concentrated to GND. Thus, the influence on the antenna 13 can be suppressed with a relatively simple structure, and high-precision radio wave reception can be achieved.

[0117] [Modifications]

[0118] Furthermore, although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various modifications can be made without departing from the gist of the present invention.

[0119] For example, in the present embodiment, an external terminal board 8 is arranged at the 3 o'clock position and the 9 o'clock position in the analog clock, and is fastened together with at least one metal bezel 6 and the housing 1, respectively, but the position, range, number and type of metal parts connected to one external terminal board 8 are not limited to the case illustrated in the embodiment. More metal bezels 6 and metal button tubes 75 can also be connected to one external terminal board 8. In this case as well, if any of the metal parts connected by the external terminal board 8 is connected to GND, all the metal parts connected to the external terminal board 8 can be connected to GND. In addition, in the present embodiment, the metal parts include the metal bezel 6, the metal button 7 and the metal button tube 75, but the metal parts may also include the metal bezel 6 and the metal button tube 75, and the metal button 7 is replaced by an operating button formed of a material different from metal.

[0120] In addition, in the present embodiment, the buffer bezel 5 as a buffer component covers substantially the entire case 1, and the metal bezel 6 is arranged at the 3 o'clock position and the 9 o'clock position of the analog clock, but the setting position and range of the buffer bezel 5 and the metal bezel 6 are not limited to the case shown in the embodiment.

[0121] In addition, in this embodiment, the vibration plate 42 of the piezoelectric sound unit 4 is illustrated as a GND functional part that acts as a GND, but the GND functional part is not limited to the vibration plate 42 as long as it is a metal component arranged inside the shell 1 and indirectly connected to the external terminal plate 8.

[0122] In addition, in this embodiment, the electronic device is a wristwatch-type clock 100, but the electronic device is not limited thereto. For example, it can be widely applied to various electronic devices such as smart clocks, sports clocks, and wearable devices that obtain biological information such as heart rate and blood flow information in addition to time.

[0123] Several embodiments of the present invention have been described above, but the scope of the present invention is not limited to the above-described embodiments, and includes the scope of the invention described in the claims and the scope equivalent thereto.

Claims

1. An electronic device, characterized in that: have: A first metal part and a second metal part are mounted on the housing; a first terminal plate, which is electrically connected to the first metal part and the second metal part on the outer side of the housing; as well as A GND functional unit is disposed inside the housing and is electrically connected to the first terminal board.

2. The electronic device according to claim 1, characterized in that: have: A third metal part and a fourth metal part, which are externally mounted on the housing; and a second terminal plate, which is electrically connected to the third metal part and the fourth metal part on the outside of the housing, The GND function unit is electrically connected to the second terminal plate.

3. The electronic device according to claim 2, characterized in that: The first metal part, the second metal part, the third metal part, and the fourth metal part respectively include any one of a metal bezel, a metal button, and a metal button tube.

4. The electronic device according to claim 3, characterized in that: The metal button comprises: a button head; and a shaft, one end of which is connected to the button head and the other end of which is inserted into the coil spring member. The metal button is electrically connected to the terminal board via the coil spring component and the metal button tube.

5. The electronic device according to claim 1, characterized in that: The first metal fitting and the second metal fitting are attached to the housing by fastening members via the first terminal plate.

6. The electronic device according to claim 2, characterized in that: The third metal fitting and the fourth metal fitting are attached to the housing by fastening members via the second terminal plate.

7. The electronic device according to claim 1, characterized in that: An antenna is arranged in the housing.

8. The electronic device according to claim 1, characterized in that: The GND functional portion is a vibration plate formed of a metal plate member.

9. An electronic clock, characterized in that: have: A first metal part and a second metal part are mounted on the housing; a first terminal plate, which is electrically connected to the first metal part and the second metal part on the outer side of the housing; as well as A GND functional unit is disposed inside the housing and is electrically connected to the first terminal board.

10. The electronic timepiece according to claim 9, characterized in that: have: A third metal part and a fourth metal part, which are externally mounted on the housing; and a second terminal plate, which is electrically connected to the third metal part and the fourth metal part on the outside of the housing, The GND function unit is electrically connected to the second terminal plate.

11. The electronic timepiece according to claim 10, characterized in that: The first metal part, the second metal part and the first terminal plate are arranged at three points. The third metal fitting, the fourth metal fitting, and the second terminal plate are arranged on the 9 o'clock side.

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