Detection device and clock

Abstract

We provide a detection device that is highly resistant to shock and has high detection sensitivity, as well as a watch equipped with it. [Solution] The device comprises a back cover 5 which is the main case, a sensor substrate 7 provided inside the back cover 5, a window portion 9 provided in a through hole 15 of the back cover 5, a sensor body portion 16 which is the main part provided between the sensor substrate 7 and the window portion 9 and abuts against the window portion 9, and a sensor connection portion 17 which is integrated with the sensor body portion 16 and extends from the sensor body portion 16 to the sensor substrate 7 and is electrically connected to the sensor substrate 7, and a body-mounted sensor 11 which is a first detection unit that detects whether the device is in contact with or close to the user's skin through the window portion 9.Therefore, the sensor body portion 16 can be pressed against the window portion 9 by the sensor connection portion 17, thereby increasing impact resistance against impacts such as drops, and the sensor body portion 16 can be brought as close as possible to the skin of the arm, thereby increasing the detection sensitivity.

Description

Technical Field

[0001] This invention relates to a detection device used in a body-worn device such as a wristwatch that is worn on the body such as the arm and a timepiece provided with the same.

Background Art

[0002] For example, in a wristwatch-type body-worn device that is worn on the arm, as described in Patent Document 1, there is known a device that prevents wasteful power consumption by detecting the pulse only when it is worn on the arm.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004] Such a body-worn device includes a pulse sensor that detects the pulse of the wearer and a body-worn sensor that detects whether the body-worn device is worn on the arm. In this case, the body-worn sensor has a plurality of metal pins provided to protrude from the bottom of the body-worn device, and by these plurality of metal pins contacting the arm, a change in capacitance generated in the body is detected to determine whether the body-worn device is worn on the arm.

[0005] However, in such a body-worn device, since the plurality of metal pins of the body-worn sensor that contact the arm are provided to protrude to the outside from the bottom of the body-worn device, the plurality of metal pins of the body-worn sensor may corrode or wear due to overuse, resulting in a problem that the detection sensitivity for detecting a change in capacitance generated in the body decreases.

Summary of the Invention

Problems to be Solved by the Invention

[0006] Therefore, for example, a structure has been conceived in which annular metal pads are provided inside the body-worn device instead of the multiple metal pins of the body-worn sensor. In this case, the metal pads may be provided on the sensor board corresponding to the window portion of the body-worn device, or the metal pads may be provided on the inner surface of the window portion of the body-worn device and connected to the sensor board with a leaf spring.

[0007] However, the former type of body-worn device has the problem that the distance from the metal pad to the skin of the arm becomes longer, resulting in poor detection sensitivity. Furthermore, the distance from the metal pad to the skin of the arm is easily changed by drops or impacts, which alters the capacitance and reduces detection sensitivity. In addition, the latter type of body-worn device has the problem that the metal pad is easily damaged and peels off by impacts such as drops because a leaf spring is in contact with it.

[0008] The problem this invention aims to solve is to provide a detection device that is resistant to shock and has high detection sensitivity, as well as a watch equipped with the same. [Means for solving the problem]

[0009] This invention relates to a detection device comprising: a main body case; a substrate provided inside the main body case; a window portion provided corresponding to an opening in the main body case; a main portion provided between the substrate and the window portion and in contact with the window portion; and a connecting portion integrated with the main portion, extending from the main portion to the substrate and electrically connected to the substrate, the first detection unit which detects whether the device is in contact with or in close proximity to the user's skin through the window portion. [Effects of the Invention]

[0010] This invention makes it possible to provide a device that is highly resistant to impact and has high detection sensitivity. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view showing a first embodiment in which this invention is applied to a wristwatch. [Figure 2]Figure 1 is a side view of the wristwatch shown, viewed from the 3 o'clock position. [Figure 3] Figure 2 is a view of the back of the wristwatch shown, seen from below. [Figure 4] Figure 3 is an enlarged plan view of the back cover of the watch, as seen from the inside of the watch case. [Figure 5] Figure 4 is an enlarged cross-sectional view showing the main part of the case back as seen through the line AA. [Figure 6] Figure 5 shows the sensor substrate, where (a) is an enlarged top view of the sensor substrate viewed from above, and (b) is an enlarged bottom view of the sensor substrate viewed from below. [Figure 7] Figure 5 shows the window portion of the back cover and the body-worn sensor, where (a) is an enlarged top view of the window portion of the back cover seen from above, and (b) is an enlarged unfolded view of the body-worn sensor seen from above. [Figure 8] This is an enlarged plan view of the case back as seen from the inside of the watch case in a second embodiment of this invention applied to a wristwatch. [Figure 9] Figure 8 is an enlarged cross-sectional view showing the main part of the case back as seen through the arrow BB. [Figure 10] Figure 9 is an enlarged bottom view of the sensor substrate shown, viewed from below. [Figure 11] Figure 9 shows the window portion of the back cover and the body-worn sensor, where (a) is an enlarged top view of the window portion of the back cover seen from above, and (b) is an enlarged unfolded view of the body-worn sensor seen from above. [Figure 12] This is an enlarged cross-sectional view showing the main part of the back cover at the location corresponding to the CC arrow on the sensor substrate shown in Figure 10. [Figure 13] This is a third embodiment in which the invention is applied to a wristwatch, and is an enlarged plan view of the case back as seen from the inside of the watch case. [Figure 14] Figure 13 is an enlarged cross-sectional view showing the main part of the case back as seen through the arrow DD. [Figure 15] Figure 14 is an enlarged bottom view of the sensor substrate shown, viewed from below. [Figure 16]Fig. 14 shows the window portion of the back cover and the body-worn sensor, where (a) is an enlarged top view of the window portion of the back cover seen from above, and (b) is an enlarged unfolded view of the body-worn sensor seen from above.

Mode for Carrying Out the Invention

[0012] (First Embodiment) Hereinafter, referring to FIGS. 1 to 7, a first embodiment in which this invention is applied to a wristwatch will be described. As shown in FIGS. 1 to 3, this wristwatch includes a wristwatch case 1. Band attachment portions 1a to which watch bands 2 are attached are provided on the 12 o'clock side and the 6 o'clock side of this wristwatch case 1, respectively. Switch portions 3 are provided on the 2 o'clock side, 3 o'clock side, 4 o'clock side, 8 o'clock side, and 10 o'clock side of this wristwatch case 1, for example. However, the portion corresponding to some of the switch portions 3 may be replaced with a charging terminal.

[0013] Also, as shown in FIG. 1, a watch (windshield) glass 4 is provided at the upper opening portion of this wristwatch case 1 via a glass packing (not shown). As shown in FIGS. 2 and 3, a back cover 5 which is a main body case is attached to the lower part (back surface) of this wristwatch case 1 by a plurality of screws 5a via a waterproof ring (not shown). This back cover 5 is formed of a highly rigid metal such as stainless steel or a titanium alloy. Note that the back cover 5 is kept at the same potential as GND by being electrically connected to a circuit board serving as GND, for example, to prevent the generation of noise.

[0014] A watch module (not shown) is provided inside this wristwatch case 1. Although not shown, this watch module includes a watch movement that moves the hands to indicate the time, a flat display device that electro-optically displays various information such as time, date, and day of the week, and a circuit board that drives and controls these watch movement and display device. Various components necessary for the watch function are mounted.

[0015] Incidentally, as shown in Figures 4 and 5, the back cover 5 of the watch case 1 is equipped with a detection device 6 that detects biological information such as pulse rate when the watch case 1 is worn on the wrist. This detection device 6 is provided in a window 9 on the back cover 5. In this case, the approximately central part of the back cover 5 is provided with a projection 5b that protrudes downward in a nearly circular shape, as shown in Figures 2 and 5.

[0016] As shown in Figures 4 and 5, a substantially circular mounting recess 5c is provided on the inner surface (upper surface) of the protruding portion 5b of the back cover 5, where the sensor substrate 7 is positioned together with the spacer member 8. As shown in Figures 5 and 7(a), a circular light-transmitting window 9 is provided in the center of this mounting recess 5c. In this case, a through hole 15 is provided vertically through the center of the mounting recess 5c of the back cover 5, that is, the center of the protruding portion 5b of the back cover 5. This through hole 15 comprises a large-diameter hole 15a on the lower side and a small-diameter hole 15b on the upper side.

[0017] As shown in Figure 5, the window portion 9 in the center of the protruding portion 5b of the case back 5 has a structure in which a window glass 9a is fitted into a large-diameter hole 15a of a through hole 15 provided in the protruding portion 5b of the case back 5 via a waterproof gasket 9b. As a result, the window portion 9 is waterproof and airtight between the outer surface of the window glass 9a and the inner surface of the large-diameter hole 15a in the through hole 15 of the case back 5 by the waterproof gasket 9b, thereby providing high-pressure waterproofing.

[0018] On the other hand, the detection device 6 includes a sensor substrate 7, which is a base plate, as shown in Figures 4 to 6. This sensor substrate 7 is formed in a substantially disc shape. This sensor substrate 7 is mounted in a mounting recess 5c provided on the inner surface (top surface) of the back cover 5 via an insulating spacer member 8 made of resin or the like, as shown in Figure 5, for example. As a result, the sensor substrate 7 is mounted on the inner surface of the mounting recess 5c of the back cover 5 in a non-contact state, without contacting the back cover 5, by the spacer member 8. It is preferable that the spacer member 8 has adhesive layers on both main surfaces. This allows the sensor substrate 7 to be fixed to the inner surface of the back cover 5 with a simple configuration and in a space-saving manner.

[0019] As shown in Figures 5 and 6(b), the lower surface of the sensor substrate 7 is provided with a pulse sensor 10, which is a second detection unit for measuring pulse rate, a biological information component, and a body-wearing sensor 11, which is a first detection unit for determining whether or not the watch case 1 is being worn on the wrist. The pulse sensor 10 comprises a light-emitting element 10a and a light-receiving element 10b, which are located approximately in the center of the lower surface of the sensor substrate 7. The pulse sensor 10 is formed in a roughly rectangular plate shape, elongated in the 12 o'clock and 6 o'clock directions, and is positioned corresponding to the window glass 9a of the window portion 9 at the location corresponding to the small-diameter hole 15b of the through-hole 15 provided in the protruding portion 5b of the back cover 5.

[0020] In this case, the light-emitting element 10a of the pulse sensor 10 is an LED (Light-Emitting Diode) that emits light with a green wavelength (G) of about 550 nm, as shown in Figure 6(b), and is located in an area of ​​about 1 / 4 of the upper side of the roughly rectangular pulse sensor 10. The light-receiving element 10b is a photodiode or phototransistor that receives the reflected light of the green wavelength light emitted by the light-emitting element 10a and irradiated onto the skin of the arm, and is located in an area of ​​about 3 / 4 of the lower side of the roughly rectangular pulse sensor 10.

[0021] As shown in Figures 5 and 6(b), the light-emitting element 10a and light-receiving element 10b of this pulse sensor 10 are positioned approximately in the center of the window glass 9a of the window portion 9, corresponding to the small-diameter hole 15b of the through-hole 15, which is an opening provided in the protruding portion 5b of the back cover 5. In this case, as shown in Figures 5 and 7(a), a light-shielding film 9c, which is a covering portion, is provided on the upper inner surface of the window glass 9a by printing or other means, except for the central portion where the light-emitting element 10a and light-receiving element 10b correspond. This light-shielding film 9c prevents ambient light and covers components such as the body-worn sensor 11. The central portion of the window glass 9a, excluding this light-shielding film 9c, is formed as a light-transmitting portion 9d through which light passes.

[0022] As a result, the pulse sensor 10 is configured such that, as shown in Figures 5, 6(b), and 7(a), the light-emitting element 10a emits green wavelength light, and this emitted green wavelength light is irradiated onto the skin of the arm through the light-transmitting portion 9d in the center of the window glass 9a, excluding the light-shielding film 9c of the window portion 9. Furthermore, the pulse sensor 10 is configured such that some of the green wavelength light irradiated onto the skin of the arm is absorbed by the capillaries in the skin of the arm, but the remaining light that is not absorbed by the capillaries is reflected, and this reflected light is received by the light-receiving element 10b through the light-transmitting portion 9d in the center of the window glass 9a, excluding the light-shielding film 9c of the window portion 9 of the back cover 5, and the pulse rate is measured based on the change in the amount of this received light.

[0023] On the other hand, the body-worn sensor 11, as shown in Figures 5 and 7(b), is a capacitance sensor that detects changes in capacitance above a predetermined threshold caused by contact with or proximity to the body. This body-worn sensor 11 is located on the outer periphery of the pulse sensor 10 and is provided between the sensor substrate 7 and the window portion 9. This body-worn sensor 11 has a sensor body portion 16, which is the main part that abuts against the window glass 9a of the window portion 9, and a sensor connection portion 17, which is formed integrally with the sensor body portion 16, extends from the sensor body portion 16 toward the sensor substrate 7, and is electrically connected to the sensor substrate 7.

[0024] As shown in Figures 5 and 7(b), the body-worn sensor 11 is formed from a thin metal sheet, for example, a stainless steel plate with nickel plating on its surface. This metal sheet does not have to be a stainless steel plate; it may be made of various metal materials or alloys, such as titanium. Furthermore, this metal sheet is not limited to nickel plating; it may also be plated with highly conductive metals such as gold or silver. As a result, the body-worn sensor 11 is formed by cutting out a single metal sheet, with the sensor body 16 and the sensor connection part 17 being integrally formed.

[0025] In this case, as shown in Figures 5 and 7(b), the sensor body 16 is formed in an annular shape in a plan view from a certain direction, i.e., from above. This sensor body 16 is positioned on the outer circumference of the light-shielding film 9c of the window glass 9a at a location corresponding to the small-diameter hole 15b of the through hole 15, without contacting the back cover 5. The sensor connection portion 17 is an elastic portion that is elastically deformable and positioned between the sensor substrate 7 and the window portion 9. In a plan view from a certain direction, i.e., from above, this sensor connection portion 17 is formed in a spiral shape on the inner circumference side of the sensor body 16, and this spiral portion is stretched vertically to form a helical shape.

[0026] As a result, as shown in Figures 5 and 7(b), the sensor connection portion 17 is formed with a large-diameter portion 17a on the lower side that abuts against the window portion 9 and is continuous with the sensor body portion 16, and with a small-diameter portion 17b on the upper side that connects to the sensor substrate 7. The small-diameter portion 17b of this sensor connection portion 17 is positioned in contact with a spring contact 7a provided on the lower surface of the sensor substrate 7. This spring contact 7a is formed by patterning copper foil in a substantially annular shape, and is sized to be located on the outer circumference of the pulse sensor 10, and is larger than the light-transmitting portion 9d of the window glass 9a, and is hidden from view by the light-shielding film 9c.

[0027] In other words, as shown in Figures 6(b) and 7(b), the spring contact 7a is formed in a non-continuous, substantially annular shape with an outer circumference the same size as the small-diameter portion 17b of the sensor connection portion 17. A positioning hole 7b for positioning the sensor connection portion 17 is provided in the discontinuous portion of the spring contact 7a. As a result, the sensor connection portion 17 is positioned and attached to the sensor substrate 7 by bending the inner end portion 17c of the small-diameter portion 17b and inserting it into the positioning hole 7b. In this case, the sensor body portion 16 may also be fixed to the window portion 9 with a connecting member such as double-sided adhesive tape.

[0028] Incidentally, as shown in Figures 5 and 7(a), the window glass 9a of the window portion 9 is fitted through a large-diameter hole 15a of the through hole 15 provided in the protruding portion 5b of the back cover 5 via a waterproof gasket 9b, so that the outer circumference of the window glass 9a is larger than the outer circumference of the body-worn sensor 11. As a result, when the watch case 1 is worn on the arm and the back cover 5 is positioned on the arm, the body-worn sensor 11 detects a change in capacitance above a predetermined threshold caused by contact with or proximity to the body through the window glass 9a at the location corresponding to the small-diameter hole 15b of the through hole 15, thereby detecting whether or not the watch case 1 is worn on the arm.

[0029] Furthermore, as shown in Figure 6(a), a plurality of chip components 12 and a connector 13 are provided on the upper surface of the sensor substrate 7. The plurality of chip components 12 are electrically connected to the pulse sensor 10 via through-holes (not shown) provided in the sensor substrate 7 by wiring patterns (not shown) formed on the sensor substrate 7. As a result, the plurality of chip components 12 drive the light-emitting element 10a of the pulse sensor 10 and capture the change in the amount of light received by the light-receiving element 10b as pulse information, and calculate the pulse by performing calculations based on this captured pulse information.

[0030] Furthermore, as shown in Figure 6(a), these multiple chip components 12 are electrically connected to a connector 13 provided on the upper surface of the sensor substrate 7 by wiring patterns (not shown) formed on the sensor substrate 7. Thus, the pulse sensor 10 is electrically connected to the connector 13 via the multiple chip components 12. The body-worn sensor 11, as shown in Figures 5, 6(a), and 6(b), has spring contacts 7a formed on the sensor substrate 7 that are electrically connected to a connector 13 provided on the upper surface of the sensor substrate 7 via through-holes (not shown) provided on the sensor substrate 7.

[0031] This connector 13 is electrically connected to the circuit board (not shown) of the watch module, which is located inside the watch case 1, by a flexible wiring board (not shown). As a result, the watch module is configured to electro-optically display pulse information detected by the pulse sensor 10 as pulse rate on the planar display device (not shown) because the planar display device is electrically connected to the circuit board of the watch module.

[0032] In this case, a spacer member 8 is positioned between the sensor substrate 7 and the back cover 5, as shown in Figures 5 and 6(a). This spacer member 8 is formed in an annular shape approximately the same size as the sensor substrate 7, for example, from an insulating synthetic resin. The spacer member 8 is provided with a sensor insertion hole 8a into which a portion of the pulse sensor 10 and the body-worn sensor 11 are inserted, bringing the pulse sensor 10 and a portion of the body-worn sensor 11 to face the window portion 9 of the back cover 5. This sensor insertion hole 8a is circular in shape, slightly larger than the sensor body portion 16 of the body-worn sensor 11 which is larger than the pulse sensor 10, and is formed to penetrate the upper and lower surfaces of the spacer member 8.

[0033] In this case, as shown in Figure 5, when the pulse sensor 10 is placed in the sensor insertion hole 8a of the spacer member 8, it is inserted into the small-diameter hole 15b of the through hole 15 provided in the protruding portion 5b of the back cover 5, and the lower surface of the pulse sensor 10 is in contact with or close to the inner surface (upper surface) of the window glass 9a of the window portion 9. Also, when the pulse sensor 10 is placed in the sensor insertion hole 8a of the spacer member 8, the sensor body portion 16 of the body-worn sensor 11 inserted into the sensor insertion hole 8a is pressed against the light-shielding film 9c provided on the upper surface of the window glass 9a by the elastic force of the sensor connection portion 17.

[0034] Therefore, as shown in Figure 5, the body-mounted sensor 11 does not come into contact with the window glass 9a due to the light-shielding film 9c, and is positioned in a non-contact state with the back cover 5, without the electric field being shielded by the back cover 5, corresponding to the small-diameter hole 15b of the through-hole 15 in the window portion 9 of the back cover 5. As a result, even if the back cover 5 is made of a metal such as stainless steel or titanium alloy, the body-mounted sensor 11 can detect changes in capacitance above a predetermined threshold caused by contact with or proximity to the body, with the sensor body portion 16 having the maximum surface area.

[0035] Next, we will describe how to use the wristwatch of this first embodiment. The wristwatch of this first embodiment is typically worn by attaching the wristwatch case 1 to the wrist. In this state, information such as the time, day of the week, and date can be viewed through the watch glass 4 via the watch module (not shown) inside the wristwatch case 1. In this state, if the function for detecting biological information such as pulse rate is turned on, the detection device 6 starts detection.

[0036] In this case, first, the body-mounted sensor 11 of the detection device 6 detects a change in capacitance exceeding a predetermined threshold caused by contact with or proximity to the body through the window 9 of the back cover 5, and determines whether or not the watch case 1 is being worn on the wrist. If the body-mounted sensor 11 determines that the watch case 1 is not being worn on the wrist, the pulse sensor 10 does not measure the pulse, thus preventing unnecessary power consumption. If the body-mounted sensor 11 determines that the watch case 1 is being worn on the wrist, the pulse sensor 10 of the detection device 6 starts measuring the pulse.

[0037] When the pulse sensor 10 begins measuring the pulse, the light-emitting element 10a of the pulse sensor 10 emits green wavelength light, and this emitted green wavelength light is irradiated onto the skin of the arm through the central light-transmitting portion 9d of the window glass 9a of the window portion 9 provided on the back cover 5. Of this irradiated green wavelength light, some is absorbed by the capillaries in the skin of the arm, but the remaining light that is not absorbed by the capillaries is reflected. This reflected light is received by the light-receiving element 10b of the pulse sensor 10 through the window glass 9a of the window portion 9 of the back cover 5.

[0038] The light received by the light-receiving element 10b is input to the circuit board of the watch module located inside the watch case 1 via the connector 13 and a flexible wiring board (not shown). This input light information is processed by a control unit (neither shown) on the circuit board of the watch module based on the change in the amount of light received, and calculated as a pulse rate. The pulse rate information thus calculated is displayed as a pulse rate on the display device (not shown) of the watch module.

[0039] Thus, according to the watch detection device 6 of this first embodiment, by comprising a back cover 5 which is the main case, a sensor substrate 7 provided inside the back cover 5, a window portion 9 provided in a through hole 15 which is an opening in the back cover 5, a sensor body portion 16 which is the main part provided between the sensor substrate 7 and the window portion 9 and in contact with the window portion 9, and a body-worn sensor 11 which is a first detection unit that is integrally formed with the sensor body portion 16 and has a sensor connection portion 17 that extends from the sensor body portion 16 to the sensor substrate 7 and is electrically connected to the sensor substrate 7, and detects whether the device is in contact with or close to the user's skin through the window portion 9, it is possible to provide a device that is resistant to impact and has high detection sensitivity.

[0040] In other words, the detection device 6 of this wristwatch has a sensor body 16 that contacts the window 9 of the back cover 5, and a sensor connection part 17 that is integrally formed with the sensor body 16, extends from the sensor body 16 to the sensor substrate 7, and is electrically connected to the sensor substrate 7. The sensor connection part 17 allows the sensor body 16 to be pressed against the window 9. This increases impact resistance against impacts such as drops, and because the sensor body 16 is pressed against the window 9, the sensor body 16 can be brought as close as possible to the skin of the arm, thereby increasing the detection sensitivity.

[0041] In this wristwatch detection device 6, the first detection unit, the body-worn sensor 11, is made of metal, and the sensor connection unit 17 is an elastic part that is elastically deformable and positioned between the sensor substrate 7 and the window unit 9. In other words, since the sensor connection unit 17 can be made of metal, the elastic force of the sensor connection unit 17 can be increased. As a result, the elastic force of the sensor connection unit 17 can reliably press the sensor body unit 16 against the window unit 9, thereby increasing the impact resistance of the body-worn sensor 11 against impacts such as drops.

[0042] Furthermore, in this wristwatch detection device 6, the first detection unit, the body-worn sensor 11, is formed from a single metal sheet. By cutting out this single metal sheet, the main sensor body 16 and the sensor connection part 17 are integrally formed. This reduces the number of parts and allows the single metal sheet to be formed to the minimum size. Even if the single metal sheet is formed to the minimum size by cutting out the sheet, the area of ​​the sensor body 16 can be maximized, thereby increasing the detection sensitivity.

[0043] Furthermore, in this watch detection device 6, the sensor connection portion 17 is formed in a spiral shape, which allows the spiral sensor connection portion 17 to have elasticity similar to that of a spring member. As a result, the elastic force of the spirally formed sensor connection portion 17 can reliably and effectively press the sensor body portion 16 against the window portion 9. In this case, the sensor connection portion 17 can be easily formed into an elastic spiral shape by making spiral-shaped cuts in a single metal sheet and stretching this spiral portion in the thickness direction of the metal sheet.

[0044] Furthermore, in this wristwatch detection device 6, when viewed from above in a plan view from a certain direction, the main part, the sensor body 16, is formed in an annular shape, and the sensor connection part 17 is provided inside the inner circumference of the sensor body 16. As a result, even if the metal sheet is formed to the minimum size, the area of ​​the sensor body 16 can be made large when viewed from a certain direction in a plan view, that is, the area corresponding to the skin of the arm can be made large, thereby increasing the detection sensitivity. In addition, the sensor connection part 17 can be formed spirally on the inner circumference side of the sensor body 16 to give it elasticity like a spring member.

[0045] Furthermore, the detection device 6 of this wristwatch includes a pulse sensor 10, which is a second detection unit for detecting biological information and is located on the lower surface of the sensor substrate 7 inside the back cover 5, and a light-shielding film 9c, which is located on the inner surface of the window portion 9 and is a covering portion that covers the body-worn sensor 11 without covering the pulse sensor 10 when viewed from above in a plan view from a certain direction. As a result, the body-worn sensor 11 can be hidden from view from the outside by the light-shielding film 9c. This enhances the design and allows the pulse sensor 10 to reliably and accurately measure the human pulse through the light-transmitting portion 9d of the window portion 9 that is not covered by the light-shielding film 9c when the wristwatch case 1 is worn on the wrist.

[0046] Therefore, in this watch's detection device 6, even if the back cover 5 is made of metal, the body-mounted sensor 11, which is positioned in accordance with the light-shielding film 9c of the window portion 9, can reliably and effectively detect whether or not the back cover 5 is attached to the body. As a result, the pulse sensor 10 can measure the pulse only when the watch case 1 is attached to the body, thus preventing unnecessary power consumption.

[0047] In this case, the detection device 6 for this wristwatch has a body-mounted sensor 11 that is a capacitance sensor that detects changes in capacitance occurring on the body. Therefore, even if the back cover 5 is made of metal, the body-mounted sensor 11, which is provided in accordance with the window glass 9a of the window portion 9 of the back cover 5, can reliably detect changes in capacitance above a predetermined threshold caused by contact with or proximity to the body through the window portion 9 of the back cover 5. This allows the body-mounted sensor 11 to accurately and reliably determine whether or not the back cover 5 of the wristwatch case 1 is being worn on the wrist.

[0048] Furthermore, in this watch's detection device 6, the body-worn sensor 11 surrounds the pulse sensor 10, allowing for reliable and accurate detection of capacitance changes exceeding a predetermined threshold caused by contact or proximity to the body by the body-worn sensor 11, without affecting the pulse measurement of the body by the pulse sensor 10. As a result, the pulse sensor 10 can accurately detect the body's pulse, and the body-worn sensor 11 can reliably detect whether or not the back cover 5 is attached to the body through the window 9 of the back cover 5.

[0049] (Second Embodiment) Next, a second embodiment applying this invention to a wristwatch will be described with reference to Figures 8 to 12. Note that the same parts as those in the first embodiment shown in Figures 1 to 7 will be denoted by the same reference numerals. As shown in Figures 8 to 12, this wristwatch has a different structure from the first embodiment in the first detection unit, the body-worn sensor 21, and the second detection unit, the pulse sensor 22, of the detection device 20, but otherwise it has almost the same structure as the first embodiment.

[0050] As shown in Figures 9 and 10, the pulse sensor 22 comprises a plurality of light-emitting elements 22a and one light-receiving element 22b, and is provided on the lower surface of the sensor substrate 7. That is, the one light-receiving element 22b has the same structure as the light-receiving element 10b of the first embodiment, is positioned in the center of the lower surface of the sensor substrate 7, and is surrounded by a square frame-shaped light-shielding wall 22c. This square frame-shaped light-shielding wall 22c is intended to prevent light emitted by the plurality of light-emitting elements 22a and ambient light from irradiating the light-receiving element 22b. Specifically, the light-shielding wall 22c is positioned between the sensor substrate 7 and the window glass 9a with its upper end surface in contact with the lower surface of the window glass 9a of the window portion 9, and its lower end surface in contact with the inner surface (upper surface) of the window glass 9a of the window portion 9.

[0051] Each of the multiple light-emitting elements 22a has the same structure as the light-emitting element 10a in the first embodiment, as shown in Figures 9 and 10, and is arranged at four separate locations outside the frame-shaped light-shielding wall 22c, namely two locations at the 12 o'clock and 6 o'clock positions and two locations at the 3 o'clock and 9 o'clock positions. In this case, the inner surface of the window glass 9a is provided with a light-shielding film 9e, which is a covering portion, similar to the first embodiment, except for the locations corresponding to the multiple light-emitting elements 22a and the one light-receiving element 22b, which includes the frame-shaped light-shielding wall 22c. Furthermore, the five locations on the window glass 9a corresponding to the multiple (four) light-emitting elements 22a and the one light-receiving element 22b are each formed in the light-transmitting portion 9f.

[0052] As a result, the pulse sensor 22 is configured, as shown in Figures 9 to 11(a), to emit green wavelength light from the light-emitting element 22a, similar to the first embodiment, and the emitted green wavelength light is irradiated onto the skin of the arm through multiple light-transmitting parts 9f of the window glass 9a, excluding the light-shielding film 9e of the window portion 9. Furthermore, the pulse sensor 22 is configured such that, of the green wavelength light irradiated onto the skin of the arm, some of the light is absorbed by the capillaries in the skin of the arm, but the remaining light that is not absorbed by the capillaries is reflected, and this reflected light is received by the light-receiving element 22b through the light-transmitting part 9f in the center of the window glass 9a, excluding the light-shielding film 9e of the window portion 9 of the back cover 5, and the pulse is measured based on the change in the amount of this received light.

[0053] On the other hand, as shown in Figures 9 to 11(b), the body-worn sensor 21 is a capacitive sensor that detects changes in capacitance above a predetermined threshold caused by contact with or proximity to the body, similar to the first embodiment. This body-worn sensor 21 is positioned on the outer periphery of each of the multiple light-emitting elements 22a of the pulse sensor 22 and is provided between the sensor substrate 7 and the window portion 9. This body-worn sensor 21 has a sensor body portion 23, which is the main part that contacts the window glass 9a of the window portion 9, and a plurality of sensor connection portions 24, which are formed integrally with the sensor body portion 23 and are bent from the sensor body portion 23 toward the sensor substrate 7 to be electrically connected to the sensor substrate 7.

[0054] As shown in Figures 9 and 11(b), the body-worn sensor 21 is formed from a thin metal sheet, similar to the first embodiment, with nickel plating applied to the surface of, for example, a stainless steel metal plate. This metal sheet does not have to be a stainless steel metal plate; it may be made of various metal materials or alloys, such as titanium. Furthermore, this metal sheet is not limited to nickel plating; it may be plated with highly conductive metals such as gold or silver. Thus, the body-worn sensor 21 is formed by cutting out a single metal sheet, with the sensor body portion 23 and multiple sensor connection portions 24 integrally formed.

[0055] In this case, as shown in Figures 9 and 11(b), the metal sheet of the body-worn sensor 21 is formed in a disc shape approximately the same size as the window glass 9a of the window section 9, and a rectangular cutout 21a is provided in the center corresponding to the frame-shaped light-shielding wall 22c surrounding the light-receiving element 22b of the pulse sensor 22. Four sensor connection parts 24 are bendable and cut out of this metal sheet, extending outwards from the four sides of the rectangular cutout 21a in the center. As a result, the outer periphery of the metal sheet, excluding the four sensor connection parts 24, is formed into the sensor body section 23.

[0056] As shown in Figures 9, 11(b), and 12, the sensor body 23 is positioned on the outer periphery of the light-shielding film 9e of the window glass 9a without contacting the back cover 5. Each of the multiple sensor connection parts 24 is an elastic part that is elastically deformable and positioned between the sensor substrate 7 and the window part 9. These multiple sensor connection parts 24 are provided at four locations on the metal sheet: two at the 12 and 6 o'clock positions and two at the 3 and 9 o'clock positions. Each of these sensor connection parts 24 has a connecting end 24a that is continuous with the sensor body 23 located on the outer periphery of the metal sheet and is bendable toward the sensor substrate 7. As a result, each connecting end 24a of the multiple sensor connection parts 24 is positioned by connecting its bent tip toward the sensor substrate 7 to a plurality of spring contacts 7c on the sensor substrate 7.

[0057] Each of the tips of these multiple sensor connection portions 24 is provided with one positioning projection 24b and two contact projections 24c, as shown in Figures 9, 11(b), and 12. In this case, each location on the outer circumference of the four light-emitting elements 22a of the sensor substrate 7 is provided with two spring contacts 7c and a positioning hole 7d located between these two spring contacts 7c, as shown in Figure 10. Each of the two spring contacts 7c is formed by patterning copper foil in a roughly rectangular shape.

[0058] As a result, as shown in Figures 9, 11(b), and 12, each connecting end 24a of the multiple sensor connection parts 24 is bent, and when the sensor body 23 is pressed against the light-shielding film 9e provided on the window glass 9a of the window part 9, each positioning projection 24b is inserted into each positioning hole 7d of the sensor substrate 7 to position each of the multiple sensor connection parts 24, and the tips of the two contact projections 24c are pressed against each of the spring contacts 7c to electrically connect with the sensor substrate 7. These multiple sensor connection parts 24 and multiple spring contacts 7c are located on the outer circumference of the light-transmitting part 9f of the window glass 9a and are hidden from view by the light-shielding film 9e. The sensor body 23 may also be fixed to the window part 9 with a connecting member such as double-sided adhesive tape.

[0059] In this case, as shown in Figures 9, 10, and 12, the pulse sensor 22, similar to the first embodiment, has multiple light-emitting elements 22a and one light-receiving element 22b, each electrically connected to multiple chip components 12 via through-holes (not shown) provided in the sensor substrate 7. The body-worn sensor 21, as shown in Figures 9 and 10, has multiple sensor connection parts 24 connected to each spring contact 7c of the sensor substrate 7, each electrically connected to a connector 13 provided on the upper surface of the sensor substrate 7 via through-holes (not shown) provided in the sensor substrate 7. Similar to the first embodiment, this connector 13 is electrically connected to the circuit board (neither shown) of the watch module inside the watch case 1 by a flexible wiring board (not shown).

[0060] Thus, according to the watch detection device 20 of this second embodiment, by comprising a back cover 5 which is the main case, a sensor substrate 7 provided inside the back cover 5, a window portion 9 provided in a through hole 15 which is an opening in the back cover 5, a sensor body portion 23 which is the main part provided between the sensor substrate 7 and the window portion 9 and in contact with the window portion 9, and a body-worn sensor 21 which is a first detection unit formed integrally with the sensor body portion 23 and having a plurality of sensor connection portions 24 that extend from the sensor body portion 23 to the sensor substrate 7 and are electrically connected to the sensor substrate 7, and which detects whether the device is in contact with or close to the user's skin through the window portion 9, it is possible to provide a device that is resistant to impact and has high detection sensitivity, similar to the first embodiment.

[0061] In other words, the detection device 20 of this wristwatch has a sensor body 23 that contacts the window 9 of the back cover 5, and a plurality of sensor connection parts 24 that are integrally formed with the sensor body 23 and extend from the sensor body 23 to the sensor substrate 7 and are electrically connected to the sensor substrate 7. Therefore, similar to the first embodiment, the sensor body 23 can be pressed against the window 9 by the plurality of sensor connection parts 24, thereby increasing impact resistance against impacts such as drops. Furthermore, because the sensor body 23 is pressed against the window 9, the sensor body 23 can be brought as close as possible to the skin of the arm, thereby increasing the detection sensitivity.

[0062] Therefore, in this watch detection device 20, similar to the first embodiment, even if the case back 5 is made of metal, the body-mounted sensor 21 provided in the window portion 9 of the case back 5 can reliably detect changes in capacitance above a predetermined threshold caused by contact with or proximity to the body through the window portion 9 of the case back 5. Thus, it is possible to reliably and effectively detect whether or not the case back 5 is mounted on the body.

[0063] In this case as well, in the detection device 20 of this wristwatch, the body-worn sensor 21, which is the first detection unit, is made of metal, and the multiple sensor connection parts 24 are elastic parts that are elastically deformable and arranged between the sensor substrate 7 and the window part 9. As with the first embodiment, the multiple sensor connection parts 24 can be made of metal, so that the elastic force of each of the multiple sensor connection parts 24 can be strengthened. This allows the sensor body part 23 to be reliably pressed against the window part 9 by the elastic force of the multiple sensor connection parts 24, thereby increasing the impact resistance of the body-worn sensor 21 against impacts such as drops.

[0064] Furthermore, in this wristwatch detection device 20, similar to the first embodiment, the first detection unit, the body-worn sensor 21, is formed from a single metal sheet. By cutting out this metal sheet, the main sensor body 23 and the multiple sensor connection parts 24 are integrally formed, thereby reducing the number of parts and allowing the metal sheet to be formed to the minimum size. As a result, even with the metal sheet formed to the minimum size, the area of ​​the sensor body 23 can be maximized, thereby increasing the detection sensitivity.

[0065] Furthermore, the detection device 20 of this wristwatch includes a pulse sensor 22, which is a second detection unit for detecting biological information, located below the sensor substrate 7 inside the back cover 5, and a light-shielding film 9e, which is a covering portion that covers the body-worn sensor 21 without covering the pulse sensor 22, as in the first embodiment. This allows the body-worn sensor 21 to be hidden from view by the light-shielding film 9e, thereby enhancing the design. In addition, when the wristwatch case 1 is worn on the wrist, the pulse sensor 22 can reliably and accurately measure the pulse of the human body through the light-transmitting portion 9f of the window 9 that is not covered by the light-shielding film 9e.

[0066] Therefore, in this watch detection device 20, similar to the first embodiment, even if the back cover 5 is made of metal, the body-mounted sensor 21, which is positioned in accordance with the light-shielding film 9e of the window portion 9, can reliably and effectively detect whether or not the back cover 5 is mounted on the body. As a result, the pulse sensor 22 can measure the pulse only when the watch case 1 is mounted on the body, thus preventing unnecessary power consumption.

[0067] In this case, the detection device 20 for this wristwatch has a body-mounted sensor 21 that is a capacitance sensor that detects changes in capacitance occurring on the body. Therefore, as in the first embodiment, even if the back cover 5 is made of metal, the body-mounted sensor 21, which is provided corresponding to the window glass 9a of the window portion 9 of the back cover 5, can reliably detect changes in capacitance above a predetermined threshold caused by contact with or proximity to the body through the window portion 9 of the back cover 5. This allows the body-mounted sensor 21 to accurately and reliably determine whether or not the back cover 5 of the wristwatch case 1 is being worn on the wrist.

[0068] Furthermore, in this watch's detection device 20, the body-worn sensor 21 surrounds the pulse sensor 22, and, similar to the first embodiment, it is possible to reliably and effectively detect changes in capacitance above a predetermined threshold caused by contact or proximity to the body by the body-worn sensor 21 without affecting the pulse measurement of the body by the pulse sensor 22. As a result, the pulse sensor 22 can accurately detect the body's pulse, and the body-worn sensor 21 can reliably detect whether or not the back cover 5 is attached to the body through the window 9 of the back cover 5.

[0069] In the second embodiment described above, the sensor connection portion 24 was described as having one positioning projection 24b that is inserted into a positioning hole 7d of the sensor substrate 7 and two contact projections 24c that are connected to two spring contacts 7c of the sensor substrate 7. However, the present invention is not limited to this. For example, the sensor connection portion 24 may include two positioning projections that are inserted into two positioning holes of the sensor substrate 7 and one contact projection that is connected to one spring contact of the sensor substrate 7. Furthermore, the invention is not limited to this, and for example, the sensor connection portion 24 may include one positioning projection that is inserted into one positioning hole of the sensor substrate 7 and one contact projection that is connected to one spring contact of the sensor substrate 7.

[0070] (Third embodiment) Next, a third embodiment applying this invention to a wristwatch will be described with reference to Figures 13 to 16. In this case, the same reference numerals will be used for the same parts as in the second embodiment shown in Figures 8 to 12. As shown in Figures 13 to 16, this wristwatch has a different structure from the second embodiment in the window portion 31 of the back cover 5 and the body-worn sensor 32, which is the first detection unit of the detection device 30, but otherwise it has almost the same structure as the second embodiment.

[0071] In this case, the back cover 5 is provided with multiple window sections 31, as shown in Figures 14 and 16(a). Each of these window sections 31 corresponds to one of the multiple light-emitting elements 22a and one light-receiving element 22b of the pulse sensor 22 provided on the sensor substrate 7. As a result, the multiple window sections 31 completely separate the optical paths of the multiple light-emitting elements 22a and the one light-receiving element 22b. These multiple window sections 31 are structured so that each of the multiple through holes 35 provided in the protruding portion 5b of the back cover 5 has a window glass 31a fitted into it via a waterproof gasket 31b.

[0072] Of these multiple window sections 31, the inner surface of each window glass 31a of each window section 31 corresponding to the four light-emitting elements 22a is provided with a light-shielding film 31c by printing or other means, as shown in Figure 15, except for the areas corresponding to each light-emitting element 22a of the pulse sensor 22, as shown in Figure 16(a). The areas corresponding to each light-emitting element 22a where these light-shielding films 31c are not provided are light-transmitting sections 31d. Furthermore, the window glass 31a of the window section 31 corresponding to the light-receiving element 22b does not have a light-shielding film 31c on its inner surface and is a light-transmitting section that transmits light.

[0073] As shown in Figures 14 and 15, the pulse sensor 22, similar to the second embodiment, comprises a plurality of light-emitting elements 22a and one light-receiving element 22b, and is provided on the lower surface of the sensor substrate 7. In this case, the one light-receiving element 22b is positioned in the center of the lower surface of the sensor substrate 7 and is surrounded by a square frame-shaped light-shielding wall 22c. This square frame-shaped light-shielding wall 22c prevents light emitted by the plurality of light-emitting elements 22a and ambient light from irradiating the light-receiving element 22b. The light-shielding wall 22c is positioned between the sensor substrate 7 and the window glass 9a, with its upper end surface in contact with the lower surface and its lower end surface in contact with the inner surface (upper surface) of the window glass 9a of the window portion 9. Each of the plurality of light-emitting elements 22a is positioned at four separate locations outside the frame-shaped light-shielding wall 22c, namely two locations at the 12 o'clock and 6 o'clock positions and two locations at the 3 o'clock and 9 o'clock positions.

[0074] As a result, the pulse sensor 22 is configured, as shown in Figures 14 to 16(a), to emit green wavelength light from the light-emitting element 22a, similar to the second embodiment, and the emitted green wavelength light is irradiated onto the skin of the arm through multiple light-transmitting portions 31d of each window glass 31a, excluding the light-shielding films 31c of each of the multiple window portions 31. Furthermore, the pulse sensor 22 is configured such that, of the green wavelength light irradiated onto the skin of the arm, some of the light is absorbed by the capillaries in the skin of the arm, but the remaining light that is not absorbed by the capillaries is reflected, and this reflected light is received by the light-receiving element 22b through the window glass 31a of the window portion 31 in the center of the back cover 5, and the pulse is measured based on the change in the amount of this received light.

[0075] On the other hand, as shown in Figures 14 to 16(b), the body-worn sensor 32 is a capacitive sensor that detects changes in capacitance above a predetermined threshold caused by contact with or proximity to the body, similar to the first embodiment. This body-worn sensor 32 is provided between the sensor substrate 7 and the window portion 9, corresponding to each of the multiple light-emitting elements 22a of the pulse sensor 22. This body-worn sensor 32 has a sensor body portion 33, which is the main part, that is sequentially connected in contact with each of the window glass 31a of the multiple window portions 31 corresponding to the multiple light-emitting elements 22a, and a plurality of sensor connection portions 34, which are formed integrally with the sensor body portion 33 and are bent from the sensor body portion 33 toward the sensor substrate 7 to be electrically connected to the sensor substrate 7.

[0076] As shown in Figures 14 and 16(b), the body-worn sensor 32 is formed from a thin metal sheet, similar to the first embodiment, with nickel plating applied to the surface of, for example, a stainless steel metal plate. This metal sheet does not have to be a stainless steel metal plate; it may be made of various metal materials or alloys, such as titanium. Furthermore, this metal sheet is not limited to nickel plating; it may be plated with highly conductive metals such as gold or silver. Thus, the body-worn sensor 32 is formed by cutting out a single metal sheet, with the sensor body portion 33 and the multiple sensor connection portions 34 being integrally formed.

[0077] As shown in Figures 14 and 16(b), the sensor body 33 comprises a plurality of disc portions 33a, each approximately the same size as each of the window glass 31a of the plurality of window portions 31 corresponding to the plurality of light-emitting elements 22a, and a plurality of connecting portions 33b that sequentially connect these plurality of disc portions 33a. This sensor body 33 is positioned separately on the outside of the frame-shaped light-shielding wall 22c surrounding the light-receiving element 22b of the pulse sensor 22. In this case, the plurality of disc portions 33a are positioned so as not to come into contact with the back cover 5 and are not visible from the outside, corresponding to the light-shielding films 31c provided on each of the plurality of window glass 31a. In addition, the plurality of connecting portions 33b are provided with bent portions 33c (see Figure 14) to prevent them from coming into contact with the back cover 5 located between the plurality of window glass 31a.

[0078] As shown in Figures 14 and 16(b), the multiple sensor connection portions 34 are elastic portions that are elastically deformable and positioned between the sensor substrate 7 and the multiple window portions 31. These multiple sensor connection portions 34 are provided by being bendable and cut out from each of the disc portions 33a of the multiple sensor body portions 33. That is, these multiple sensor connection portions 34 are cut out except for the multiple connecting ends 34a that are connected to each of the disc portions 33a of the multiple sensor body portions 33. As a result, the multiple connecting ends 34a of the multiple sensor connection portions 34 are bent toward the sensor substrate 7, and each of these bent ends 34b is connected to the multiple spring contacts 7e of the sensor substrate 7.

[0079] Each of the tip portions 34b of the multiple sensor connection portions 34 is provided with one positioning projection 34c and two contact projections 34d, as shown in Figures 14 and 16(b). In this case, the sensor substrate 7 is provided with two spring contacts 7e located on each side of the four light-emitting elements 22a, as shown in Figure 15, and positioning holes 7f located between each of these two spring contacts 7e. Each of the two spring contacts 7e is made by forming a copper foil pattern in a roughly rectangular shape.

[0080] In this case, of the multiple sensor connection parts 34, the sensor connection part 34 located at the 12 o'clock position has its connecting end 34a positioned to correspond to the multiple spring contacts 7e located at the 11 o'clock position to the left of the 12 o'clock light-emitting element 22a, as shown in Figure 16(b). As a result, as shown in Figure 14, when the connecting end 34a at the 11 o'clock position of the sensor connection part 34 located at the 12 o'clock position is bent toward the sensor substrate 7, the positioning projection 34c of the tip 34b is inserted into the positioning hole 7f at the 11 o'clock position of the sensor substrate 7 to position the sensor connection part 34 at the 12 o'clock position, and the tips of the contact projections 34d at the 11 o'clock position are pressed against the multiple spring contacts 7e at the 11 o'clock position to electrically connect with the sensor substrate 7.

[0081] Similarly, as shown in Figure 16(b), the sensor connection portion 34 located at the 6 o'clock position has a connecting end 34a that corresponds to a plurality of spring contacts 7e located at the 5 o'clock position to the right of the light-emitting element 22a at the 6 o'clock position. As a result, when the connecting end 34a at the 5 o'clock position of the sensor connection portion 34 located at the 6 o'clock position is bent toward the sensor substrate 7, the positioning projection 34c of the tip 34b is inserted into the positioning hole 7f at the 5 o'clock position of the sensor substrate 7 to position the sensor connection portion 34 at the 6 o'clock position, and the tips of the contact projections 34d are pressed against the plurality of spring contacts 7e at the 5 o'clock position to electrically connect with the sensor substrate 7.

[0082] Furthermore, as shown in Figure 16(b), the sensor connection portion 34 located at the 3 o'clock position has a connecting end 34a that corresponds to a plurality of spring contacts 7e located at the 2 o'clock position above the light-emitting element 22a at the 3 o'clock position. As a result, when the connecting end 34a at the 2 o'clock position of the sensor connection portion 34 located at the 3 o'clock position is bent toward the sensor substrate 7, the positioning projection 34c of the tip portion 34b is inserted into the positioning hole 7f at the 2 o'clock position of the sensor substrate 7 to position the sensor connection portion 34 at the 6 o'clock position, and the tips of the contact projections 34d are pressed against the plurality of spring contacts 7e at the 2 o'clock position to electrically connect with the sensor substrate 7.

[0083] Similarly, as shown in Figure 16(b), the sensor connection portion 34 located at the 9 o'clock position has a connecting end 34a that corresponds to a plurality of spring contacts 7e located at the 8 o'clock position below the light-emitting element 22a at the 9 o'clock position. As a result, as shown in Figure 14, when the connecting end 34a at the 8 o'clock position is bent toward the sensor substrate 7, the positioning projection 34c of the tip 34b is inserted into the positioning hole 7f at the 8 o'clock position of the sensor substrate 7 to position the sensor connection portion 34 at the 9 o'clock position, and the tips of the contact projections 34d are pressed against the plurality of spring contacts 7e at the 8 o'clock position to electrically connect with the sensor substrate 7.

[0084] As shown in Figures 14 and 16(b), these multiple sensor connection parts 34 and multiple spring contacts 7e are located on the outer periphery of the light-transmitting portion 31d of the multiple window panes 31a corresponding to the multiple light-emitting elements 22a, and are hidden from view from the outside by the light-shielding films 31c provided on the inner surface of each of the multiple window panes 31a. The sensor body 33 may also be fixed to the window portion 31 by a connecting member such as double-sided adhesive tape.

[0085] In this case, as shown in Figures 14 and 15, the pulse sensor 22, similar to the first embodiment, has multiple light-emitting elements 22a and one light-receiving element 22b, each electrically connected to multiple chip components 12 via through-holes (not shown) provided in the sensor substrate 7. The body-worn sensor 32, as shown in Figures 14 and 15, has multiple sensor connection parts 34 connected to each spring contact 7e of the sensor substrate 7, which are electrically connected to a connector 13 provided on the upper surface of the sensor substrate 7 via through-holes (not shown) provided in the sensor substrate 7. Similar to the first embodiment, this connector 13 is electrically connected to the circuit board (neither shown) of the watch module inside the watch case 1 by a flexible wiring board (not shown).

[0086] Thus, according to the watch detection device 30 of this third embodiment, a watch detection device can be provided that is as shock-resistant and highly sensitive as in the first embodiment, by comprising a back cover 5 which is the main case, a sensor substrate 7 provided inside the back cover 5, window portions 31 provided corresponding to a plurality of through holes 35 which are openings in the back cover 5, a sensor body portion 33 which is the main part provided between the sensor substrate 7 and the plurality of window portions 31 and in contact with the plurality of window portions 31, and a plurality of sensor connection portions 34 which are connection portions formed integrally with the sensor body portion 33 and extending from the sensor body portion 33 to the sensor substrate 7 and electrically connected to the sensor substrate 7, and a body-worn sensor 32 which is a first detection unit that detects whether the device is in contact with or close to the user's skin via the plurality of window portions 31.

[0087] In other words, the detection device 30 of this wristwatch has a sensor body 33 that contacts a plurality of windows 31 on the back cover 5, and a plurality of sensor connection parts 34 that are integrally formed with the sensor body 33, extend from the sensor body 33 to the sensor substrate 7, and are electrically connected to the sensor substrate 7. Therefore, similar to the first embodiment, the sensor body 33 can be pressed against the plurality of windows 31 by the plurality of sensor connection parts 34, thereby increasing impact resistance against impacts such as drops, and because the sensor body 33 is pressed against the plurality of windows 31, the sensor body 33 can be brought as close as possible to the skin of the arm, thereby increasing the detection sensitivity.

[0088] Therefore, in this watch detection device 30, similar to the first embodiment, even if the case back 5 is made of metal, the body-mounted sensors 32 provided in the multiple windows 31 of the case back 5 can reliably detect changes in capacitance above a predetermined threshold caused by contact with or proximity to the body through the multiple windows 31 of the case back 5. Thus, it is possible to reliably and effectively detect whether or not the case back 5 is mounted on the body.

[0089] In this case as well, in the detection device 30 of this wristwatch, the body-worn sensor 32, which is the first detection unit, is made of metal, and the multiple sensor connection parts 34 are elastic parts that are elastically deformable and positioned between the sensor substrate 7 and the multiple window parts 31. As a result, the multiple sensor connection parts 34 can be made of metal, and the elastic force of each of the multiple sensor connection parts 34 can be strengthened. This ensures that the sensor body 33 is reliably pressed against the multiple window parts 31 by the elastic force of the multiple sensor connection parts 34, thereby increasing the impact resistance of the body-worn sensor 32 against impacts such as drops.

[0090] Furthermore, in this wristwatch detection device 30, the first detection unit, the body-worn sensor 32, is formed from a single metal sheet. By cutting out this single metal sheet, the main sensor body 33 and the multiple sensor connection parts 34 are integrally formed, similar to the first embodiment. This reduces the number of parts and allows the metal sheet to be formed to the minimum size. As a result, even with the metal sheet formed to the minimum size, the area of ​​the sensor body 33 can be maximized, thereby increasing the detection sensitivity.

[0091] Furthermore, the detection device 30 of this wristwatch includes a pulse sensor 22, which is a second detection unit for detecting biological information, located on the lower surface of the sensor substrate 7 inside the back cover 5, and a plurality of light-shielding films 31c, which are covering parts that cover the body-worn sensor 32, which is the first detection unit, without covering the pulse sensor 22, located on the inner surface of each of the plurality of window portions 31. As a result, similar to the first embodiment, the body-worn sensor 32 can be hidden from view from the outside by the plurality of light-shielding films 31c. This enhances the design aesthetics, and when the wristwatch case 1 is worn on the wrist, the pulse sensor 22 can reliably and accurately measure the pulse of the human body through the light-transmitting portions 31d of the plurality of window portions 31 that are not covered by the plurality of light-shielding films 31c.

[0092] Therefore, in this watch detection device 30, even if the back cover 5 is made of metal, the body-mounted sensors 32, which are arranged to correspond to each light-shielding film 31c of the multiple window portions 31, can reliably and effectively detect whether or not the back cover 5 is mounted on the body. Thus, as in the first embodiment, the pulse sensor 22 can measure the pulse only when the watch case 1 is mounted on the body, thus preventing unnecessary power consumption.

[0093] In this case, the detection device 30 for this wristwatch has a body-worn sensor 32 that is a capacitance sensor that detects changes in capacitance occurring on the body. Therefore, as in the first embodiment, even if the back cover 5 is made of metal, the body-worn sensor 32, which is provided corresponding to each window glass 31a of the multiple window portions 31 of the back cover 5, can reliably detect changes in capacitance above a predetermined threshold caused by contact with or proximity to the body through the multiple window portions 31 of the back cover 5. This allows the body-worn sensor 32 to accurately and reliably determine whether or not the back cover 5 of the wristwatch case 1 is being worn on the wrist.

[0094] Furthermore, in this watch's detection device 30, the body-worn sensor 32 surrounds the pulse sensor 22, and, similar to the first embodiment, it is possible to reliably and effectively detect changes in capacitance above a predetermined threshold caused by contact or proximity to the body by the body-worn sensor 32 without affecting the pulse measurement of the body by the pulse sensor 22. As a result, the pulse sensor 22 can accurately detect the body's pulse, and the body-worn sensor 32 can reliably detect whether or not the back cover 5 is attached to the body through the multiple windows 31 on the back cover 5.

[0095] In the third embodiment described above, the sensor connection portion 34 was described in a case where it has one positioning projection 34c that is inserted into a positioning hole 7f of the sensor substrate 7 and two contact projections 24d that are connected to two spring contacts 7e of the sensor substrate 7. However, the present invention is not limited to this. For example, the sensor connection portion 34 may have two positioning projections that are inserted into two positioning holes of the sensor substrate 7 and one contact projection that is connected to one spring contact of the sensor substrate 7. Furthermore, it is not limited to this, for example, the sensor connection portion 34 may have one positioning projection that is inserted into one positioning hole of the sensor substrate 7 and one contact projection that is connected to one spring contact of the sensor substrate 7.

[0096] Furthermore, while the first to third embodiments described above described cases in which pulse sensors 10 and 22 were used to detect pulse rate as biosensors, this invention is not limited to these. For example, an oxygen saturation sensor that optically detects the oxygen saturation level of the body may also be used. In short, any biosensor that optically detects biological information is acceptable.

[0097] Furthermore, while the first to third embodiments described above describe the case where the main body case is the back cover 5 of the watch case 1, this invention does not necessarily require the case to be the back cover 5 of the watch case 1; it may also be the case of a body-worn device, etc.

[0098] Furthermore, while the first to third embodiments described above focused on applications to watches, this invention is not limited to watches and can be applied to body-worn devices such as smartwatches, smartphones, smart glasses, and belt-type devices that are worn on the arm or other parts of the body. [Explanation of Symbols]

[0099] 1 Watch Case 5. Case back 5a Screw 5b Protrusion 5c Mounting recess 6, 20, 30 Detection device 7 COM circuit board 7a, 7c, 7e Spring contacts 7b, 7d, 7f Positioning holes 8 Spacer member 9, 31 Window section 9a, 31a Window glass 9b, 31b Waterproof gasket 9c, 9e, 31c light shielding film 9d, 9f, 31d Light transmission section 10, 22 Pulse sensor 10a, 22a Light-emitting element 10b, 22b Photodetector 11, 21, 32 Body-worn sensors 12 chip components 13 Connectors 15, 35 through holes 16, 23, 33 Sensor body 17, 24, 34 Sensor connection section

Claims

1. The main case and A circuit board provided inside the main body case, A window portion provided corresponding to the opening of the main body case, A first detection unit has a main part provided between the substrate and the window portion and in contact with the window portion, and a connecting part that is integral with the main part and extends from the main part to the substrate and is electrically connected to the substrate, and detects whether the device is in contact with or close to the user's skin through the window portion, A detection device equipped with the following features.

2. The first detection unit is made of metal, The connecting portion is an elastic portion that is elastically deformable and positioned between the substrate and the window portion. The detection device according to claim 1.

3. The first detection unit is a single metal sheet having the main part and the connecting part. The detection device according to claim 2.

4. The aforementioned connecting portion is formed in a spiral shape. The detection device according to claim 3.

5. In a plan view from a certain direction, The main part is formed in a ring shape, The connecting portion is provided inside the inner circumference of the main portion. The detection device according to claim 4.

6. A second detection unit is provided on the lower side of the circuit board within the main body case for detecting biological information, The window portion is provided on the main surface of the window portion and includes a covering portion that, in a plan view from a certain direction, covers the first detection portion without covering the second detection portion, The detection device according to claim 1.

7. A second detection unit is provided on the lower side of the circuit board within the main body case for detecting biological information, The window portion is provided on the main surface and includes a covering portion that, in a plan view from a certain direction, covers the first detection portion without covering the second detection portion, The first detection unit is made of metal, The connecting portion is an elastic portion that is elastically deformable and positioned between the substrate and the window portion, and is bent so as to be covered by the covering portion in a plan view from a certain direction. The detection device according to claim 1.

8. A clock equipped with the detection device described in claim 1.

Images