Electronic device

Abstract

The present embodiment comprises: a bottom cover; a PPG sensor disposed on the bottom cover and having a substrate on which a light source and a sensor are installed; an actuator which is disposed on the bottom cover and to which wires are connected; and a flexible PCB to which the wires are connected and which is connected to the PPG sensor. The actuator may be provided in a plurality. The plurality of actuators may be spaced apart from one another. Each of the plurality of actuators may be spaced apart from the PPG sensor.

Description

electronic devices

[0001] The present invention relates to an electronic device.

[0002] Electronic devices may include home appliances, electronic notebooks, portable multimedia players, mobile communication terminals, tablet PCs, video / audio devices, desktop / laptop computers, vehicle navigation systems, wearable devices, etc., and may refer to devices that perform specific functions according to a program installed thereon.

[0003] An example of an electronic device may be a wearable device disclosed in Korean Patent Publication No. 10-2019-0088751 A (published on July 29, 2019), and the wearable device comprises: a sensor for measuring a user's heart rate signal; and a processor for identifying a user's blood pressure. The processor obtains a correction curve for measuring blood pressure for a user based on the user's heart rate signal measured by the sensor simultaneously with the measurement of a reference blood pressure by a reference blood pressure monitor, and identifies the user's blood pressure based on the obtained correction curve for measuring blood pressure.

[0004] Another example of an electronic device is a wearable device connected to a vibration output device disclosed in Korean Published Patent Application 10-2019-0000333 A (published January 2, 2019), and the vibration output device includes a transceiver that receives a composite signal from an electronic device; a signal analysis unit that analyzes the composite signal to acquire a signal; and a vibration generating unit that generates vibration according to the acquired signal when the signal is acquired.

[0005] Another example of an electronic device is an electronic device having a haptic actuator disclosed in Korean Published Patent Application No. 10-2020-0109737 A (published September 23, 2020), wherein the electronic device comprises: a hinge structure; a first housing structure connected to the hinge structure and including a first surface facing a first direction and a second surface facing a second direction opposite to the first direction; a foldable housing connected to the hinge structure and including a third surface facing a third direction and a fourth surface facing a fourth direction opposite to the third direction, and a second housing structure that folds with respect to the hinge structure; a flexible display extending over the first surface and over the third surface; at least one sensor disposed within the foldable housing and configured to detect a folded state of the foldable housing; and a first haptic actuator disposed within the first housing structure. A second haptic actuator disposed within the second housing structure is disclosed.

[0006] The present embodiment provides an electronic device in which a plurality of actuators can interact with a sensor.

[0007] The present embodiment provides an electronic device that can minimize distortion of the signal output from the sensor by the wire connected to the actuator and minimize performance degradation regarding the measurement of blood flow changes by the sensor.

[0008] The electronic device according to the present embodiment includes a bottom cover; a PPG sensor disposed on the bottom cover, with a light source and a sensor installed on a substrate; an actuator disposed on the bottom cover and connected by a wire; and a flexible PCB connected by a wire and connected to the PPG sensor.

[0009] Multiple actuators may be provided.

[0010] Multiple actuators can be spaced apart from each other.

[0011] Each of the multiple actuators can be spaced apart from the PPG sensor.

[0012] Multiple actuators can be spaced apart at equal intervals.

[0013] A plurality of actuators may include a first actuator and a second actuator closer to one end of the bottom cover and the other end; and a third actuator closer to the other end of the bottom cover.

[0014] The PPG sensor can be placed in the center of the bottom cover.

[0015] The wire can bypass the substrate.

[0016] The bottom cover may include a contact portion that protrudes convexly downward.

[0017] The actuator can be seated in the contact part.

[0018] A sensing part may be formed in the bottom cover, having a transmission hole through which light generated from a light source is transmitted and a sensing hole through which light reflected from the wrist is transmitted.

[0019] The sensing part may protrude convexly downward.

[0020] The protrusion width of the sensing part may be the same as the protrusion width of the contact part.

[0021] The bottom cover may have a transmission hole through which light generated from a light source is transmitted, and a sensing hole through which light reflected from the wrist is transmitted.

[0022] The light source can be placed above the through hole.

[0023] The sensor can be placed on the upper side of the sensing hole.

[0024] The PPG sensor may further include a PPG driver mounted on a substrate that converts an analog signal into a digital signal.

[0025] The PPG sensor may further include a connector to which a flexible PCB is connected.

[0026] The light source and the PPG sensor can be spaced apart from each other on the bottom surface of the substrate.

[0027] The PPG driver and connector can be spaced apart from each other on the upper surface of the substrate.

[0028] The flexible PCB may include a main part equipped with a connector that contacts a PPG sensor and a wire connection part that protrudes from the main part and is connected to a wire.

[0029] The wire connection can be bent and overlap with the main part.

[0030] The main part may include an overlap part that overlaps with the wire connection part and a non-overlap part that does not overlap with the wire connection part.

[0031] The electronic device may further include a middle cover coupled to a bottom cover and having an upper receiving portion and a lower receiving portion formed therein; a main PCB received in the upper receiving portion and connected to a flexible PCB; a battery received in the lower receiving portion; and a top cover covering the front receiving portion and the main PCB.

[0032] The electronic device may further include a button placed on the middle cover; and a button PCB on which the button is installed and connected to the main PCB.

[0033] According to the present embodiment, a plurality of actuators are spaced apart from each other to apply haptic vibrations to the user in the most three-dimensional way possible, and each of the plurality of actuators is spaced apart from each other to minimize the transmission of vibrations generated by the actuators to the sensor and to minimize the degradation of the sensor's performance caused by vibrations generated by the actuators.

[0034] In addition, since the wire connected to the actuator is connected to the flexible substrate, there is no need to form an actuator connection circuit on the substrate, and the distortion of the analog signal output from the PPB sensor by the signal controlling the actuator can be minimized, and the degradation of performance regarding the measurement of blood flow changes can be minimized.

[0035] In addition, the wire bypasses the substrate, which minimizes the distortion of the analog signal output from the sensor by noise of the signal passing through the wire and minimizes the performance degradation of the sensor caused by noise.

[0036] FIG. 1 is a perspective view showing an electronic device according to the present embodiment,

[0037] FIG. 2 is a drawing showing a bottom cover of an electronic device according to the present embodiment,

[0038] FIG. 3 is an exploded perspective view of an electronic device according to the present embodiment,

[0039] FIG. 4 is a plan view showing a sensor and a plurality of actuators according to the present embodiment,

[0040] FIG. 5 is a perspective view showing a sensor and a plurality of actuators according to the present embodiment,

[0041] FIG. 6 is a plan view of a PPG sensor according to the present embodiment,

[0042] FIG. 7 is a bottom view of a PPG sensor according to the present embodiment,

[0043] FIG. 8 is a bottom view of a bottom cover according to the present embodiment,

[0044] FIG. 9 is a side view of a bottom cover according to the present embodiment,

[0045] FIG. 10 is a drawing showing one side of a flexible PCB according to the present embodiment, and

[0046] FIG. 11 is a drawing showing another side of a flexible PCB according to the present embodiment, and

[0047] FIG. 12 is a diagram showing the flexible PCB according to the present embodiment when it is bent and the flexible PCB is connected to a PPG sensor.

[0048] Specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0049] FIG. 1 is a perspective view showing an electronic device according to the present embodiment, and FIG. 2 is a view showing a bottom cover of an electronic device according to the present embodiment.

[0050] The electronic device according to the present embodiment may be a wearable device capable of performing computing activities by being attached to the body.

[0051] The electronic device can be worn on the user's wrist (W, hereinafter referred to as the wrist) and can measure blood flow in the wrist (W).

[0052] The electronic device may include a housing (1) that forms the exterior.

[0053] A strap (not shown) can be connected to the housing (1), and the electronic device can be worn on the wrist (W) by the strap.

[0054] The housing (1) may be composed of a combination of multiple members.

[0055] One example of the housing (1) may include a bottom cover (2), a middle cover (3), and a top cover (4).

[0056] The bottom cover (2) can form the bottom surface of the electronic device. The bottom cover (2) may face the wrist (W). The bottom cover (2) may come into contact with the wrist (W). The bottom surface of the bottom cover (2) may come into contact with the wrist (W). Part of the bottom surface of the bottom cover (2) may come into contact with the wrist (W), and the remainder of the bottom surface of the bottom cover (2) may not come into contact with the wrist (W).

[0057] A charging terminal (5) may be placed on the bottom cover (2). The bottom of the charging terminal (5) may be exposed to the outside.

[0058] The bottom cover (2) can be fastened to at least one of the middle cover (3) and the top cover (4) by a fastening member such as a screw.

[0059] The middle cover (3) can form the periphery of the electronic device. The middle cover (3) can be positioned above the bottom cover (2). The middle cover (3) can be combined with the bottom cover (2).

[0060] The top cover (4) can form the upper surface of the electronic device. The top cover (4) can be placed on the upper surface of the middle cover (3).

[0061] Another example of the housing (1) may include a bottom cover (2) and an upper housing.

[0062] The upper housing can form the periphery surface and the top surface surface of the electronic device. The upper housing can be positioned on the upper side of the bottom cover (2) and can be combined with the bottom cover (2).

[0063] The plurality of members constituting the housing (1) are not limited in number, and any member capable of forming the exterior of an electronic device can be applied.

[0064] FIG. 3 is an exploded perspective view of an electronic device according to the present embodiment, FIG. 4 is a plan view showing a sensor and a plurality of actuators according to the present embodiment, FIG. 5 is a perspective view showing a sensor and a plurality of actuators according to the present embodiment, FIG. 6 is a plan view of a PPG sensor according to the present embodiment, and FIG. 7 is a bottom view of a PPG sensor according to the present embodiment.

[0065] The electronic device may include a PPG sensor (6; Photoplethysmogram Sensor); an actuator (7) and a flexible PCB (8; FPCB; Flexible Printed Circuit Board).

[0066] A PPG sensor mounting portion (21) for mounting a PPG sensor (6) may be formed in the bottom cover (2). The PPG sensor mounting portion (21) may be formed in the center of the bottom cover (2). The PPG sensor mounting portion (21) may be recessed downward in the bottom cover (2).

[0067] An actuator mounting portion (22) in which an actuator (7) is mounted may be formed in the bottom cover (2).

[0068] The actuator mounting portion (22) can be formed between the edge (E) of the bottom cover (2) and the PPG sensor mounting portion (21).

[0069] The actuator mounting portion (22) may include a recess (23) that is recessed downward in the bottom cover (2). The lower part of the actuator (7) may be inserted into the recess (23) and may be received in the recess (23).

[0070] The actuator mounting portion (22) may include a rib (24) protruding upward.

[0071] The rib (24) may protrude upward from the periphery of the recess (23). The rib (24) may distinguish the area of ​​the PPG sensor (6) and the area of ​​the actuator (7) in the bottom cover (2).

[0072] The actuator (7) can be inserted into the inside of the rib (24), and the rib (24) can surround the circumference of the actuator (7).

[0073] The actuator mounting portion (22) can correspond 1:1 with the actuator (7). If there are multiple actuators (7), there may be multiple actuator mounting portions (22).

[0074] Multiple actuator mounting portions (22) can be formed on the bottom cover (2) at spaced intervals from each other.

[0075] When a plurality of actuators (7) include a first actuator (7A), a second actuator (7B), and a third actuator (7C), the plurality of actuator mounting parts (22) may include a first actuator mounting part (22A) on which the first actuator (7A) is mounted, a second actuator mounting part (22B) on which the second actuator (7B) is mounted, and a third actuator mounting part (22C) on which the third actuator (7C) is mounted.

[0076] A through hole (25) through which a charging terminal (5, see FIG. 2) passes can be formed in the bottom cover (2). The charging terminal (5) can pass through the through hole (25) and be connected to a charging connector described later.

[0077] The bottom cover (2) may include a barrier (26).

[0078] Bayer (26) can prevent the wire (71) of the actuator (7) from coming into contact with the substrate (63) of the PPG sensor (6).

[0079] The barrier (26) may be formed to protrude upward. The barrier (26) may guide the wire (71) to bypass the PPG sensor (6). A pair of barriers (26) may be formed on the bottom cover (2).

[0080] The PPG sensor (6) can be placed on the bottom cover (2). The PPG sensor (6) can be placed on the upper surface of the bottom cover (2). The PPG sensor (6) can be placed in the center (C) of the bottom cover (2), as shown in FIG. 4.

[0081] The PPG sensor (6) may include a light source (61), a sensor (62), and a substrate (63), as shown in FIG. 7.

[0082] The light source (61) may be a light-emitting unit that emits light toward the wrist (W).

[0083] An example of a light source (61) may be an LED mounted on a substrate (63).

[0084] The light source (61) can be installed on the bottom surface of the substrate (63) and can irradiate light in a downward direction.

[0085] The light source (61) and the sensor (62) can be spaced apart from each other on the bottom surface of the substrate (73).

[0086] The sensor (62) may be a light receiving unit or light receiver that receives light reflected from the wrist (W).

[0087] The sensor (62) can be installed on the bottom surface of the substrate (63) and can receive light reflected from the wrist (W).

[0088] Each of the light source (61) and the sensor (62) can be installed in multiple numbers on the substrate (63) as shown in FIG. 7.

[0089] Multiple light sources (61A) (61B) may include a first light source (61A) and a second light source (61A). The first light source (61A) and the second light source (61A) may be spaced apart in the horizontal direction.

[0090] Multiple sensors (62A)(62B)(62C)(62D) can be spaced apart in the horizontal direction.

[0091] Multiple sensors (62A)(62B)(62C)(62D) may include a pair of first sensors (62A)(62B) that are closer to the first light source (61A) among the first light source (61A) and the second light source (61A), and a pair of second sensors (62C)(62D) that are closer to the second light source (61B) among the first light source (61A) and the second light source (61A).

[0092] The PPG sensor (6) can sense a wide area of ​​the wrist (W) by means of multiple light sources (61A) (61B) and multiple sensors (62A) (62B) (62C) (62D).

[0093] An example of the substrate (63) may be a PCB (Printed Circuit Board).

[0094] A circuit may be formed on the substrate (63) to transmit a signal of a sensed value sensed by the sensor (62). The substrate (63) may be a PPG PCB.

[0095] The substrate (63) may be formed in a roughly circular shape as shown in FIGS. 6 and 7. The periphery of the substrate (63) may include a curved portion (63a) and a straight portion (63b).

[0096] As shown in FIG. 4, the straight section (63b) can be coupled with one (22C) of the plurality of actuator mounting sections (22A) (22B) (22C). The straight section (63b) can be in contact with the rib (24) of one (22C) of the plurality of actuator mounting sections (22A) (22B) (22C).

[0097] When the substrate (63) is inserted into the PPG sensor mounting portion (21), the straight portion (63b) may come into contact with the rib (24), and the substrate (63) may not rotate arbitrarily. The straight portion (63b) and the rib (24) can minimize misassembly of the substrate (63).

[0098] A recess (63c) may be formed on the periphery of the substrate (63). The recess (63c) may be formed on the opposite side of the straight portion (63b), as shown in FIGS. 6 and 7.

[0099] The area between the straight portion (63b) and the recessed portion (63c) of the perimeter of the substrate (63) may be a curved portion (63a).

[0100] A protrusion (21a, see FIG. 3) formed in the PPG sensor mounting portion (21) can be inserted into the recess (63c).

[0101] When the substrate (63) is inserted into the PPG sensor mounting portion (21), the protrusion (21a) formed on the PPG sensor mounting portion (21) can be inserted into the recess (63c) formed on the periphery of the substrate (63), and the substrate (63) can not be rotated arbitrarily.

[0102] The recess (63c) and the protrusion (21a) formed on the PPG sensor mounting portion (21) can minimize the misassembly of the substrate (63).

[0103] The PPG sensor (6) may further include a PPG driver (64) and a connector (65), as shown in FIG. 6.

[0104] The PPG driver (64) can be circuit-connected to the PPG sensor (62). The PPG sensor (62) can transmit the sensing value as an analog signal to the PPG driver (64).

[0105] The PPG driver (64) is mounted on the substrate (63) and can convert an analog signal into a digital signal.

[0106] The PPG driver (64) can be placed on the upper surface of the substrate (63), and the PPG sensor (6) can be configured more compactly when the PPG driver (64) is placed on the lower surface of the substrate (63).

[0107] A flexible PCB (8) can be connected to the connector (65).

[0108] The connector (65) can be either a female connector or a male connector.

[0109] When a male connector is placed on the flexible PCB (8), the connector (65) may be a female connector to which the male connector is connected. Conversely, when a female connector is placed on the flexible PCB (8), the connector (65) may be a male connector to which the female connector is connected.

[0110] The connector (65) can be placed on the upper surface of the substrate (63). The PPG driver (64) and the connector (65) can be placed on the upper surface of the substrate (63) spaced apart from each other.

[0111] Hereinafter, for convenience, the connector (65) installed on the substrate (63) will be referred to as the first connector (65) and the connector (85) placed on the flexible PCB (8) will be referred to as the second connector (85).

[0112] An example of the actuator (7) may be a haptic actuator that generates haptic vibrations.

[0113] A wire (71) may be connected to the actuator (7). The wire (71) may be connected to a flexible PCB (8). A signal for controlling the actuator (7) may be transmitted to the actuator (7) through the wire (71).

[0114] The wire (71) can bypass the substrate (73). The wire (71) can come into contact with the barrier (26), and contact with the substrate (73) can be minimized.

[0115] The actuator (7) can be placed on the bottom cover (2).

[0116] The vibration generated by the actuator (7) can be transmitted to the wrist (W) through the bottom cover (2).

[0117] Multiple actuators (7) may be provided.

[0118] Multiple actuators (7A)(7B)(7C) can be spaced apart from each other.

[0119] Each of the multiple actuators (7A)(7B)(7C) can be spaced apart from the PPG sensor (6).

[0120] Multiple actuators (7A)(7B)(7C) can be spaced apart at equal intervals.

[0121] Multiple actuators (7A)(7B)(7C) may include a first actuator (7A) and a second actuator (7B); and a third actuator (7C).

[0122] The first actuator (7A) and the second actuator (7B) may be positioned closer to one end (2a) of the bottom cover (2) and the other end (2b).

[0123] The third actuator (7C) can be positioned closer to the other end (2b) of the bottom cover (2) than to one end (2a).

[0124] The number of actuators near one end (2a) of the bottom cover (2) may be greater than the number of actuators near the other end (2b) of the bottom cover (2).

[0125] Each of the multiple actuators (7A)(7B)(7C) can be closer to the edge (E) than to the center (C) of the bottom cover (2).

[0126] Hereinafter, the common configuration of multiple actuators (7A)(7B)(7C) will be described as actuator (7).

[0127] A wire (71) can be connected to the flexible PCB (8).

[0128] A control signal for controlling the actuator (7) can be transmitted to the actuator (7) through a flexible PCB (8) and a wire (71).

[0129] The flexible PCB (8) can be connected to the PPG sensor (6). The second connector (85), which is a connector placed on the flexible PCB (8), can be connected to the first connector (65), which is a connector placed on the PPG sensor (6).

[0130] The analog signal of the sensing value sensed by the sensor (62) is converted into a digital signal by the PPC driver (64), and this digital signal is transmitted to the first connector (65) through a circuit formed on the substrate (63) and can be transmitted to the flexible PCB (8) through the second connector (85).

[0131] If the wire (71) is directly connected to the substrate (63) of the PPG sensor (6) and an actuator connection circuit is formed on the substrate (63), analog noise due to high current may be generated in the actuator connection circuit, and such noise may distort the analog signal output from the sensor (62) and may cause a decrease in performance regarding the measurement of blood flow changes. That is, the signal regarding blood flow changes from the sensor (61) may be affected by the control signal of the actuator (7).

[0132] On the other hand, if the wire (71) is not directly connected to the substrate (63) of the PPG sensor (6) but is connected to the flexible PCB (8), the distortion of the analog signal output from the sensor (62) can be minimized and the performance for measuring blood flow changes can be maintained.

[0133] The wire (71) can bypass the substrate (63) and be connected to the flexible PCB (8), and the analog signal of the sensor (62) can be transmitted to the flexible PCB (8) after being converted into a digital signal.

[0134] The electronic device may further include a main PCB (9).

[0135] The main PCB (9) can be accommodated inside the housing (1). An upper receiving portion (31) can be formed in the middle cover (3). The main PCB (9) can be accommodated in the upper receiving portion (91) of the middle cover (3). The top cover (4) can cover the upper receiving portion (31) and the main PCB (9). If the main PCB (9) is damaged or broken, the operator can service the main PCB (9) after removing the top cover (4).

[0136] The main PCB (9) may be equipped with a processor that controls the overall operation of the electronic device.

[0137] The main PCB (9) can check the sensing result of the sensor (62) according to the digital signal transmitted from the flexible PCB (8).

[0138] The main PCB (9) can transmit a signal to the flexible PCB (8) to control the actuator (7).

[0139] A flexible PCB (8) can be connected to the main PCB (9).

[0140] A connector (86) for connecting to a main PCB (9) may be provided on the flexible PCB (8). A connector to which the connector (86) provided on the flexible PCB (8) is connected may be provided on the main PCB (9).

[0141] The connector (86) can be either a female connector or a male connector.

[0142] If a male connector is placed on the main PCB (9), the connector (86) may be a female connector to which the male connector contacts. Conversely, if a female connector is placed on the main PCB (9), the connector (86) may be a male connector to which the female connector connects.

[0143] Hereinafter, for convenience, the connector (86) placed on the flexible PCB (8) and connected to the main board (9) is referred to as the third connector (86).

[0144] The electronic device may further include a battery (10).

[0145] The battery (10) can be accommodated inside the housing (1). A lower receiving portion (32) can be formed in the middle cover (3). The battery (10) can be accommodated in the lower receiving portion (32) of the middle cover (3).

[0146] The electronic device may further include a charging connector (101).

[0147] The charging connector (101) can be connected to the battery (10) or to the main PCB (9).

[0148] The charging connector (101) can be in contact with the charging terminal (5, see FIG. 2), and power supplied through the charging terminal (5) can be charged into the battery (10).

[0149] The wearable device may further include a button (102) placed on the middle cover (3); and a button PCB (103) on which the button (102) is installed and connected to the main PCB (9).

[0150] An example of a button PCB (103) may be a flexible PCB (FPCB).

[0151] The user can input various commands of the electronic device by operating the button (102).

[0152] Multiple actuators (7A)(7B)(7C) can be turned on and vibrated when the processor of the main board (9) outputs an on signal, and can be turned off when the processor of the main board (9) outputs an off signal.

[0153] An example of a processor on a main board (9) controlling multiple actuators (7A)(7B)(7C) is that when the power is turned on / off, the processor on the main board (9) can output an ON signal and then output an OFF signal after a set time has elapsed.

[0154] Multiple actuators (7A)(7B)(7C) can generate haptic vibrations for a set time when the power is turned on.

[0155] Multiple actuators (7A)(7B)(7C) may not generate haptic vibrations when the power is off.

[0156] Another example in which the processor of the main board (9) controls multiple actuators (7A)(7B)(7C) is that when the button (102) is pressed, the processor of the main board (9) can output an ON signal and then output an OFF signal after a set time has elapsed.

[0157] Multiple actuators (7A)(7B)(7C) can generate haptic vibrations for a set time when the button (102) is pressed.

[0158] FIG. 8 is a drawing showing the bottom surface of a bottom cover according to the present embodiment, and FIG. 9 is a side view of a bottom cover according to the present embodiment.

[0159] The bottom cover (2) may include a contact portion (27) that protrudes convexly downward.

[0160] An actuator (7) may be seated in the contact portion (27). The actuator (7) may include a vibrating body that contacts the contact portion (27). The vibrating body may be in surface contact with the contact portion (27). The vibration of the actuator (7) may be transmitted to the contact portion (27).

[0161] The actuator (7) may be a haptic vibration generating unit that generates haptic vibrations.

[0162] The contact portion (27) may be formed in the recess (23) shown in FIG. 3. The contact portion (27) may be part of the recess (23).

[0163] The contact portion (27) can correspond 1:1 with the actuator (7). Multiple contact portions (27A)(27B)(27C) may be formed in the bottom cover (2).

[0164] A plurality of contact parts (27A)(27B)(27C) may be formed such that a first contact part (27A) contacts the first actuator (7A), a second contact part (27B) contacts the second actuator (7B), and a third contact part (27C) contacts the third actuator (7C).

[0165] The first contact portion (27A) and the second contact portion (27B) may be closer to one end (2a) of the bottom cover (2) and the other end (2b).

[0166] The third contact portion (27C) can be closer to the other end (2b) of the bottom cover (2) than to one end (2a) and the other end (2b).

[0167] A sensing part (28) may be formed on the bottom cover.

[0168] In the sensing part (28), a transmission hole (28a) through which light generated from the light source (61) is transmitted, and a sensing hole through which light reflected from the wrist (W) is transmitted may be formed.

[0169] A light source (61) can be positioned above the through hole (28a) and can irradiate light toward the through hole (28a).

[0170] The sensor (62) can be positioned above the sensing hole and can receive light reflected through the sensing hole.

[0171] The sensing hole can correspond 1:1 with the sensor (62). Multiple sensing holes may be formed in the sensing part (28). Multiple sensing holes (28b)(28c)(28d)(28e) may be formed in the bottom cover (2) spaced apart from each other.

[0172] The sensing part (28) is preferably in contact with the wrist (W) and can protrude convexly downward.

[0173] The protrusion width (H1) of the sensing part (28) may be the same as the protrusion width (H2) of the contact part (H2).

[0174] FIG. 10 is a diagram showing one side of a flexible PCB according to the present embodiment, FIG. 11 is a diagram showing the other side of a flexible PCB according to the present embodiment, and FIG. 12 is a diagram showing the flexible PCB according to the present embodiment when it is bent and the flexible PCB is connected to a PPG sensor.

[0175] The flexible PCB (8) may include a main part (81) and a wire connection part (82).

[0176] The main part (81) may be provided with a second connector (85) which is a connector connected to the PPG sensor (6), and may be connected to the PPG sensor (6) by the second connector (85).

[0177] The main part (81) may be provided with a third connector (86) which is a connector connected to the main PCB (9), and may be connected to the main PCB (9) by the third connector (86).

[0178] The digital signal output from the PPG driver (64) can be transmitted to the main PCB (9) through the second connector (85), the main part (81), and the third connector (86).

[0179] The main section (81) may be equipped with a main circuit through which a digital signal output from the PPG driver (64) is transmitted.

[0180] The flexible PCB (8) may be equipped with an actuator connection circuit through which a control signal for controlling multiple actuators (7A)(7B)(7C) is transmitted.

[0181] The actuator connection circuit can be provided in the main part (81) and the wire connection part (82).

[0182] A portion of the actuator connection circuit may be provided in the main part (81), and the remainder of the actuator connection circuit may be provided in the wire connection part (82).

[0183] The main part (81) may be provided with a part of the actuator connection circuit and the main circuit together, and the wire connection part (82) may be provided with the remainder of the actuator connection circuit.

[0184] The main part (81) can be bent as shown in FIG. 12 and can be connected to the PPG sensor (6) and the main PCB (9), respectively.

[0185] The main part (81) may include an overlap part (81a) that overlaps with the wire connection part (82) and a non-overlap part (81b) that does not overlap with the wire connection part (82).

[0186] The overlap portion (81a) may be long in the horizontal direction. The second connector (85) may be located on the bottom surface of the overlap portion (81a).

[0187] The non-overlapping portion (81b) may be long in the vertical direction. A third connector (86) may be provided in the non-overlapping portion (81b).

[0188] The wire connection part (82) may protrude from the main part (81). The wire connection part (82) may protrude sideways from one end (81c) of the main part (81).

[0189] A wire (71) can be connected to the wire connection part (82).

[0190] The wire connection part (82) can be bent and overlapped with the main part (81) as shown in FIG. 12.

[0191] When the wire connection part (82) is bent, the overlap part (81a) can overlap with the wire connection part (82) in the vertical direction.

[0192] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention.

[0193] Accordingly, the embodiments disclosed in this invention are intended to explain, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments.

[0194] The scope of protection of the present invention shall be interpreted by the claims below, and all technical ideas within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

1. Bottom cover; A PPG sensor disposed on the bottom cover above, with a light source and a sensor installed on a substrate; An actuator disposed on the bottom cover and connected by a wire; and The above wire is connected, and includes a flexible PCB connected to the PPG sensor, The above actuator is provided in multiple numbers, Multiple actuators are spaced apart from each other, Each of the multiple actuators is an electronic device spaced apart from the PPG sensor.

2. In Paragraph 1, The above plurality of actuators are electronic devices spaced apart at equal intervals.

3. In Paragraph 1, The above plurality of actuators A first actuator and a second actuator closer to one end of the bottom cover, between the other end and the first end; and An electronic device comprising a third actuator that is closer to the other end of the bottom cover than to one end.

4. In Paragraph 3, The above PPG sensor is an electronic device positioned in the center of the bottom cover.

5. In Paragraph 1, The above wire is an electronic device that bypasses the above substrate.

6. In Paragraph 1, The above bottom cover includes a contact portion that protrudes convexly downward, and The above actuator is an electronic device mounted on the above contact portion.

7. In Paragraph 6, The bottom cover has a sensing part formed therein, which has a transmission hole through which light generated from the light source is transmitted and a sensing hole through which light reflected from the wrist is transmitted. The above sensing part protrudes convexly downward, and An electronic device in which the protrusion width of the sensing part is the same as the protrusion width of the contact part.

8. In Paragraph 1, The bottom cover has a transmission hole through which light generated from the light source is transmitted and a sensing hole through which light reflected from the wrist is transmitted, and The light source is positioned above the transmission hole, and The above sensor is an electronic device positioned above the sensing hole.

9. In Paragraph 1, The above PPG sensor is an electronic device further comprising a PPG driver mounted on the substrate that converts an analog signal into a digital signal.

10. In Paragraph 9, The above PPG sensor is an electronic device further comprising a connector to which the above flexible PCB is connected.

11. In Paragraph 10, The light source and the sensor are spaced apart from each other on the bottom surface of the substrate, and The above PPG driver and connector are electronic devices spaced apart from each other on the upper surface of the substrate.

12. In Paragraph 1, The above flexible PCB A main part equipped with a connector connected to the above PPG sensor and An electronic device comprising a wire connection portion protruding from the main portion and connected to the wire.

13. In Paragraph 12, The above wire connection portion is bent and overlaps with the main portion of the electronic device.

14. In Paragraph 12, The above main part An overlap portion that overlaps with the above-mentioned wire connection portion and An electronic device comprising a non-overlapping portion that does not overlap with the above-mentioned wire connection portion.

15. In Paragraph 1, A middle cover coupled to the bottom cover and having an upper receiving portion and a lower receiving portion formed therein; A main PCB received in the upper receiving portion and connected to the flexible PCB; A battery accommodated in the lower receiving portion above; and An electronic device further comprising a top cover covering the front receiving portion and the main PCB.

16. In Paragraph 15, A button placed on the middle cover above; An electronic device further comprising a button PCB connected to the main PCB and having the above-mentioned button installed thereon.

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