Body Sensors

Abstract

The present invention relates to a body sensor (1) for measuring a user's body activity, the body sensor (1) comprising a sensor part (2) and a separate connecting part (3) for fixing the sensor part (21) to the other side of a user's body part. The sensor part (2) comprises a housing (20) which encloses the components of the sensor part (2) inside the housing (20). The components comprise a circuit board (26), an optical sensor (21) configured to measure body activity by optical measurement, a first magnetic coupling part (22) configured to be connected to the optical sensor (21), and one or more other components arranged inside the housing (20). The separate connecting part (3) is independent of the sensor part (2) and comprises a second magnetic coupling part (32) configured to provide a magnetic connection with the first magnetic coupling part (22) via a first surface (20a) of the housing (20).

Description

Technical Field

[0001] The present invention relates to a body sensor for measuring the body activity of a user. Background Art

[0002] In the prior art, different types of wrist-worn body sensors are known that measure heart rate activity, for example, from the user's wrist. Also, optical heart rate sensors used in the upper arm or forearm are known. However, these types of heart rate sensors placed in connection with the user's arm or wrist are not suitable for everyone, and in particular, people with arm problems or people who use their arms frequently, such that the wrist-worn heart rate sensors interfere with their exercise.

[0003] In the prior art, it is also known that heart rate activity can be measured from the user's ear. WO2017 / 189687 discloses an integrated device to calculate heart rate and physical activity. The device consists of an accelerometer and a heart rate monitor placed in a micro device above the ear. This placement above the ear is done using a magnet. The device includes a microcontroller, a vibrator, and a wireless network module that allows the device to communicate with other devices such as smartphones, computers, etc. The heart rate is extracted from behind the ear using reflected photoplethysmography. The device for measuring this is completed using an infrared LED and a photodiode. The device for attaching the device to the ear includes a body that accommodates a magnet, which is also fixed to a flexible material that accommodates another magnet. That is, the device disclosed in WO2017 / 189687 is an integral device including two magnets that are connected to each other by a flexible material.

[0004] One of the problems associated with the prior art is that with a one-piece device, placement of the device is limited and the device becomes larger and therefore heavier, which is disadvantageous when using the device in sports such as running or other fast-paced exercise. Another problem with the prior art is that the strength of the magnetic connection between the two magnets cannot be changed in case of different ear sizes or varying strength requirements. A further problem with one-piece devices is the risk that the device will stick to hair or other sports equipment or clothing. Summary of the invention

[0005] It is an object of the present invention to provide an effective body sensor that can be freely attached to the body of a user.It is a further object of the present invention to provide an effective ear-worn heart rate sensor that can be securely attached to the ear of a user.

[0006] The object of the present invention is achieved by a body sensor. The present invention discloses a preferred embodiment.

[0007] The present invention relates to a body sensor for use in connection with a body part, such as the nose, lip, arm or ear, and preferably the earlobe. The body sensor uses an optical sensor to measure the user's body activity, such as heart rate, blood pressure or blood oxygen saturation, and transmits the information to a mobile application via a wireless connection, such as via Bluetooth. When the body sensor is placed in a charger, charging of the body sensor is provided by at least one charging pad.

[0008] The invention is based on the idea of ​​providing a compact body sensor comprising two separate parts each having a magnetic coupling feature.

[0009] According to the present invention, the body sensor includes a sensor part and a separate connecting part for fixing the sensor part to the other side of the user's body part such as an ear. That is, the body sensor includes two separate parts connected to the opposite sides of the user's body part. The sensor part includes a housing having a first surface and a second surface opposite to the first surface, and the housing encloses the components of the sensor part inside the housing. The components of the sensor part include a circuit board, an optical sensor, a first magnetic coupling part, a transparent window, and one or more other components. The circuit board is arranged between the first surface of the housing and the second surface of the housing in the housing, and preferably the circuit board extends inside the housing substantially parallel to the first surface or the second surface of the housing. The optical sensor is configured to measure body activities such as heart rate, blood pressure or blood oxygen saturation by optical measurement, and the optical sensor is arranged between the circuit board and the first side surface in the housing. That is, the optical sensor is arranged inside the housing, at a position between the first surface of the housing and the circuit board arranged inside the housing. The transparent window is arranged on the first surface of the housing and directly faces the optical sensor, so that the transparent window is configured to allow light to pass through the first surface of the housing from the optical sensor when the optical sensor emits light to the outside of the housing, and to receive light from the outside of the housing to the optical sensor through the first surface of the housing. The optical sensor and the transparent window are arranged successively in a direction from the first surface toward the second surface. The transparent window and the optical sensor can be separate parts, or the transparent window can be an integral part of the optical sensor. The first magnetic coupling part is arranged to be connected to the optical sensor so that the first magnetic coupling part provides an effective magnetic coupling with the second magnetic coupling part, which is placed on the other side of the user's body part such as the ear, so that the transparent window is arranged to be firmly against the user's body part such as the ear, so as to allow light from the optical sensor to reach the skin of the body part and measure physical activities such as heart rate according to optical measurements. The sensor part also includes one or more other components arranged inside the shell. The separate connection part is independent of the sensor part and includes a second magnetic coupling part, which is configured to provide a magnetic coupling with the first magnetic coupling part via the first surface of the shell, for fixing the sensor part to the other side of the user's body part such as the ear.

[0010] In a preferred embodiment of the present invention, the first magnetic coupling part in the sensor part is a magnet, and the second magnetic coupling part in the separate connection part is a magnet. In another embodiment of the present invention, the first magnetic coupling part in the sensor part is a magnet, and the second magnetic coupling part in the separate connection part is made of or includes a magnetic material, so that a magnetic coupling is formed between the first magnetic coupling part and the second magnetic coupling part. In yet another embodiment of the present invention, the first magnetic coupling part is made of or includes a magnetic material, so that a magnetic coupling is formed between the first magnetic coupling part and the second magnetic coupling part which is a magnet.

[0011] The components of the sensor portion are arranged in the housing in the following order from the first surface toward the second surface: a transparent window, an optical sensor, a circuit board, and a first magnetic coupling part.

[0012] In a preferred embodiment of the present invention, the optical sensor and the first magnetic coupling part are arranged on opposite surfaces of the circuit board. The circuit board may be a double-sided circuit board, and the optical sensor is connected to the first surface of the circuit board, and the first magnetic coupling part is arranged to be connected to the second surface of the circuit board. The first surface of the circuit board faces the first surface of the housing and / or the second surface of the circuit board faces the second surface of the housing. The first magnetic coupling part may be in contact with the circuit board or close to the circuit board.

[0013] Alternatively, the circuit board is arranged parallel to the first surface of the housing, and the optical sensor and the first magnetic coupling part are arranged on an opposite surface of the circuit board.

[0014] In a preferred embodiment of the invention, the optical sensor and the first magnetic coupling part at least partially overlap in a direction from the first surface towards the second surface, or the optical sensor and the first magnetic coupling part at least partially overlap in a direction from the optical sensor towards the second surface. This is a very advantageous embodiment, since the magnetic coupling provided between the first magnetic coupling part and the second magnetic coupling part is provided such that the optical sensor is at least partially between the magnetic coupling parts and is thus securely placed against a body part of the user.

[0015] In a further embodiment of the invention, the first magnetic coupling part is arranged concentrically with the optical sensor in a direction from the first surface towards the second surface. In this embodiment of the invention, the optical sensor is most securely placed against the user's body part because the optical sensor is directly in the field of action of the first magnetic coupling part.

[0016] In another embodiment of the present invention, components are arranged in the housing in the following order from the first surface toward the second surface: a transparent window, an optical sensor and a circuit board, and further, the first magnetic coupling part is arranged to at least partially overlap the transparent window in the housing between the circuit board and the first surface.

[0017] Other components of the sensor portion also include a rechargeable battery configured to provide power to the sensor portion, or other components of the sensor portion also include a rechargeable battery configured to provide power to the sensor portion and at least one charging pad connected to the battery for recharging the battery.

[0018] In an embodiment of the present invention, at least one charging pad is arranged to extend from the second surface toward the first surface of the housing and to contact the circuit board.

[0019] In an embodiment of the present invention, the rechargeable battery is arranged to form part of the first magnetic coupling part; or alternatively, the rechargeable battery is arranged to form the first magnetic coupling part. This means that the first magnetic coupling part can be arranged to be connected to the rechargeable battery, or as a part of the rechargeable battery, for example as an additional housing of the rechargeable battery, or the rechargeable battery can be made of a magnetic material so that the rechargeable battery forms the first magnetic coupling part.

[0020] In an embodiment of the present invention, other components of the sensor part are arranged in parallel with the optical sensor; or alternatively, other components of the sensor part are arranged in parallel with the first magnetic coupling part; or alternatively, other components of the sensor part are arranged in parallel with the optical sensor and the first magnetic coupling part.

[0021] In an embodiment of the invention, the optical sensor comprises a wireless communication component, or alternatively, the circuit board comprises a wireless communication component.

[0022] In an embodiment of the present invention, the body sensor is an ear heart rate sensor for measuring heart rate activity from the user's ear, the heart rate sensor includes an optical sensor configured to measure heart rate activity by optical heart rate measurement, and a separate connection part is independent of the sensor part, and includes a second magnetic coupling part, which is configured to provide a magnetic connection with the first magnetic coupling part via a first surface of the shell, for fixing the sensor part to the other side of the user's ear.

[0023] An advantage of the invention is that, since the sensor part and the separate connection part are arranged as separate elements of the body sensor, the placement of the body sensor is suitable for many types of body parts, such as the ear, and in particular the earlobe, or the nose, or the palm, and in particular in the area between the index finger and the thumb. A further advantage of the invention is that, since the sensor part comprises a small number of components, the sensor part can be made as thin as possible, which means that there is a small lever arm in the sensor part, whereby the sensor part remains stable when the sensor part is placed on the user's body part. Another advantage of the invention is that the separate connection part can be changed when other types of magnetic coupling are required, for example, when a stronger magnetic coupling is required when the user is running and a less strong magnetic coupling is required when the user is resting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is described in detail with reference to the accompanying drawings, by means of specific embodiments, in which:

[0025] Figure 1 An embodiment of a body sensor according to the present invention is shown;

[0026] Figure 2 Another embodiment of a body sensor according to the present invention is shown;

[0027] Figure 3 Another embodiment of a body sensor according to the present invention is shown;

[0028] Figure 4 Another embodiment of the body sensor according to the present invention is shown;

[0029] Figure 5 An embodiment of a body sensor according to the present invention is shown;

[0030] Figure 6 Another embodiment of a body sensor according to the present invention is shown;

[0031] Figure 7 Another embodiment of a body sensor according to the present invention is shown;

[0032] Figure 8 An embodiment of a sensor portion of a body sensor according to the present invention is shown; and

[0033] Fig. 9 Another embodiment of the sensor part of the body sensor according to the present invention is shown. DETAILED DESCRIPTION

[0034] Figure 1An embodiment of a body sensor 1 according to the present invention is shown, in which the sensor part 2 and the separate connection part 3 are arranged on opposite sides of the ear E of the user. Although all the figures show the ear E as a body part, the present invention is not limited to using the body sensor 1 in connection with the ear only, and therefore, the ear E is represented as a dotted frame in the figure. The sensor part 2 includes a housing 20 having a first surface 20a placed against the ear E and a second surface 20b opposite to the first surface 20a. The housing 20 encloses the components of the sensor part 2 inside the housing 20. That is, the housing 20 includes two surfaces: a first surface 20a and a second surface 20b, so that the components of the sensor part 2 are arranged between the surfaces 20a, 20b, or so that the components are arranged to extend from one surface toward the other surface. The housing 20 may also include a side surface, or alternatively the first surface 20a and the second surface 20b are configured so that the first surface 20a and the second surface 20b can be connected to each other, so that a space for placing the components of the sensor part 2 is provided between the first surface and the second surface. The first surface 20a and the second surface 20b may have a curved shape or any other suitable shape for setting the housing 20. In this embodiment of the present invention, the components of the sensor part 2 are a circuit board 26, an optical sensor 21 configured to measure body activity by optical measurement, a first magnetic coupling part 22, a transparent window 23, a rechargeable battery 24, and a charging pad 25, the optical sensor 21 being configured to measure body activity by optical measurement, a transparent window 23 being provided on the first surface 20a of the housing 20 and being configured to allow light to pass from the optical sensor 21 through the first surface 20a to the outside of the housing 20, a rechargeable battery 24 being configured to provide power to the sensor part 2, and a charging pad 25 connected to the battery 24 for recharging the battery 24. The charging pad 25 extends from the second surface 20b of the housing 20 toward the first surface 20a. The components of the sensor part are arranged in the housing 20 in the following order from the first surface toward the second surface: a transparent window 23, an optical sensor 21, a circuit board 26, and a first magnetic coupling part 22. In this embodiment of the present invention, the transparent window 23, the optical sensor 21 and the first magnetic coupling part 22 are arranged on top of each other in a lateral direction relative to the first surface 20a, so that the circuit board 26 is arranged between the optical sensor 21 and the first magnetic coupling part 22. The optical sensor 21 is arranged on the circuit board 26, or the optical sensor 21 is attached to the surface of the circuit board 26, so that the optical sensor 21 and the circuit board 26 form a compact assembly, and the first magnetic coupling part 22 is arranged on the other side of the circuit board 26 compared to the optical sensor 21, and preferably in direct contact with the optical sensor 21 and circuit board 26 assembly. That is, the optical sensor 21 and the circuit board 26 form a unified assembly, and the first magnetic coupling part 22 is arranged to be connected to the assembly, preferably in direct contact with the assembly.The transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling member 22 are arranged closely in succession in the housing 20 from the first surface 20a of the housing 20 toward the second surface 20b of the housing 20. Being arranged closely in succession in the housing 20 means that the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling member 22 are arranged to either abut against each other, or so that there is only the structure of the housing between the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling member 22, or alternatively, so that some of the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling member 22 abut against each other, and there is the structure of the housing between the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling member 22. That is, the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling part 22 are arranged in the shell, so that the first magnetic coupling part 22, the optical sensor 23 and the transparent window 21 are arranged along the same route from the first surface 20a of the shell 20 toward the second surface 20b of the shell 20, and so that when the second magnetic coupling part 32 of the separate connecting part 3 forms a magnetic connection with the first magnetic coupling part 22 of the sensor part 2, the transparent window 23, the optical sensor 21 and the circuit board 26 are arranged between the first magnetic coupling part 22 and the second magnetic coupling part 32, and the magnetic connection between the first magnetic coupling part 22 and the second magnetic coupling part 32 is set to pass through the transparent window 23, the optical sensor 21 and the circuit board 26.

[0035] In this embodiment of the invention, the other components of the sensor part 2 are arranged in parallel with the first magnetic coupling part 22, so that the rechargeable battery 24 and the charging pad 25 are arranged in close proximity to the first magnetic coupling part 22. Other electronic components are arranged in connection with the circuit board 26, which can be a single-sided circuit board 26 or a double-sided circuit board 26.

[0036] Figure 1 Also shown is a separate connection part 3, which is independent of the sensor part 2 and includes a second magnetic coupling part 32, which is configured to provide a magnetic coupling with the first magnetic coupling part 22 via the first surface 20a of the housing 20, for fixing the sensor part 2 to the other side of the user's ear. The separate connection part 3 is preferably placed on the front side of the user's ear, so that the back side 3b of the separate connection part 3 abuts against the user's ear and the front side 3a of the separate connection part 3 is visible. The front side 3a of the separate connection part 3 may include jewelry or other surface structures. Alternatively, the entire separate connection part 3 may include jewelry or be formed by one or more pieces of jewelry.

[0037] The body sensor 1 includes two separate parts: a sensor part 2 and a separate connection part 3. When the body sensor 1 is used, i.e., in a use mode, the ear or other body part of the user is placed between the first surface 20a of the housing 20 of the sensor part 2 and the separate connection part 3, so that a magnetic connection is set between the first magnetic connection part 22 and the second magnetic connection part 32 via the ear E of the user or via some other body part.

[0038] Figure 2 Another embodiment of the body sensor 1 according to the present invention is shown, in which, similar to Figure 1 As shown in FIG. 2 , the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling member 22 are arranged on top of each other in a lateral direction relative to the first surface 20a of the housing 20. Figure 1 As shown in FIG. 2 , the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling part 22 are arranged in close succession in the housing 20. In this embodiment of the present invention, the rechargeable battery 24 is arranged to form a part of the first magnetic coupling part 22, or alternatively, the rechargeable battery 24 is arranged to form the first magnetic coupling part 22. In this embodiment, since the rechargeable battery 24 and the first magnetic coupling part 22 are combined, the sensor part 2 is provided in a very compact form. Figure 2 The separate connection part 3 shown in Figure 1 In this embodiment of the present invention, when the second magnetic coupling part 32 of the separate connection part 3 forms a magnetic coupling with the first magnetic coupling part 22 of the sensor part 2, the transparent window 23, the optical sensor 21 and the circuit board 26 are arranged between the first magnetic coupling part 22 and the second magnetic coupling part 32, and the magnetic coupling between the first magnetic coupling part 22 and the second magnetic coupling part 32 is arranged to pass through the transparent window 23, the optical sensor 21 and the circuit board 26, except that the first magnetic coupling part 22 and the rechargeable battery 24 are combined into one, which is similar to Figure 1 connection.

[0039] Figure 3 An embodiment of a body sensor according to the present invention is shown, wherein a Figure 1 As shown in FIG. 2 , the transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling part 22 are provided in the housing 20, and the rechargeable battery 24 is provided between the first magnetic coupling part 22 and the second surface 20 b of the housing 20. In this embodiment of the present invention, the magnetic coupling formed between the first magnetic coupling part 22 and the second magnetic coupling part 32 is provided to pass through the transparent window 23, the optical sensor 21 and the circuit board 26.

[0040] Figure 4An embodiment of the present invention is shown, in which a Figures 1 to 3 The transparent window 23, the optical sensor 21, the circuit board 26 and the first magnetic coupling part 22 are arranged inside the housing 20. In this embodiment of the invention, the rechargeable battery 24 is arranged next to the transparent window and / or the optical sensor 21, that is, on the same side of the circuit board 26 as the transparent window 23 and the optical sensor 21 in the housing 20.

[0041] Figure 5 An embodiment of the sensor part 2 of the body sensor 1 according to the present invention is shown, in which the optical sensor 21 is arranged in the first magnetic coupling part 22. The first magnetic coupling part 22 includes a through hole suitable for the optical sensor 21, so that when the optical sensor 21 is arranged in the through hole, the first magnetic coupling part 22 surrounds the optical sensor 21. The first magnetic coupling part 22 with the through hole generates a magnetic flux that operates similarly with respect to the first magnetic coupling part arranged in the through hole, just as when the first magnetic coupling part 22 is arranged to at least partially overlap with the optical sensor 21 in the direction from the first surface 20a toward the second surface 20b. That is, the first magnetic coupling part 22 has a through hole passing through the first magnetic coupling part, so that the optical sensor 21 can be arranged in the through hole, so that the first magnetic coupling part 22, which is arranged to overlap with the optical sensor, surrounds the optical sensor 21 and generates an equivalent magnetic flux through the optical sensor 21, so that in the direction from the first surface 20a toward the second surface 20b, the optical sensor 21 is arranged between the transparent window 23 in the first surface 20a of the housing 20 and the first magnetic coupling part 22. Figure 5 In the embodiment shown in FIG. 2 , the first magnetic coupling part 22 having a through hole is partially arranged in the region of the transparent window 23. The magnetic flux generated by the first magnetic coupling part 22 passes through the optical sensor 21, which is arranged in the through hole in the middle of the first magnetic coupling part 22, so that the magnetic coupling between the first magnetic coupling part 22 and the second magnetic coupling part 32 provided on the opposite side of the ear E is equivalent to the magnetic coupling generated between the first magnetic coupling part provided to overlap with the optical sensor in the direction from the first surface 20a toward the second surface 20b and the second magnetic coupling part 32 of the separate connection part 3 provided on the opposite side of the ear E.

[0042] Figure 6An embodiment of the sensor part 2 of the body sensor 1 according to the present invention is shown, wherein the housing 20 of the sensor part 2 is made waterproof so that the transparent window 23 forms a part of the first surface 20a of the housing in a waterproof manner. In the direction from the first surface 20a to the second surface 20b, the optical sensor 21 is arranged adjacent to the transparent window 23, and the first magnetic coupling part 22 is arranged adjacent to the optical sensor 21. That is, in the direction from the first surface 20a to the second surface 20b, the optical sensor 21 is arranged between the first magnetic coupling part 22 and the transparent window 23. In other words, in the direction from the second surface 20b of the housing 20 toward the first surface 20a of the housing 20, the first magnetic coupling part 22 is arranged to at least partially overlap with respect to the optical sensor 21. In addition, when viewed from the second surface 20b toward the first surface 20a, the first magnetic coupling part 22 is arranged to at least partially overlap with the optical sensor 21 and the transparent window 23. That is, the magnetic flux generated by the first magnetic coupling part 22 passes through the optical sensor 21 and through the transparent window 23 forming a part of the first surface 20a of the housing 20, so that the first magnetic coupling part 22 provides magnetic interaction with the second magnetic coupling part 32 of the separate connection part 3 through the optical sensor 21 and the transparent window 23 and through the ear E. Similar to the above description, the sensor part 2 also includes a circuit board 26 and a battery 24 arranged in the housing 20.

[0043] Figure 7 An embodiment of a sensor part 2 of a body sensor 1 and a separate connecting part 3 arranged on the side of the ear E opposite to the sensor part 2 is shown. Figure 6 In the embodiment shown in FIG. 1 , the housing 20 of the sensor part 2 is made waterproof so that the transparent window 23 forms a part of the first surface 20a of the housing in a waterproof manner. Figure 62 is different from the embodiment shown in , in which the first magnetic coupling part 22 is arranged to surround the optical sensor 21. That is, the first magnetic coupling part 22 includes a through hole in the first magnetic coupling part 22, and the optical sensor 21 is arranged in the through hole so that the first magnetic coupling part 22 surrounds the optical sensor from the side of the optical sensor 21. The through hole of the first magnetic coupling part 22 is arranged to pass through the first magnetic coupling part 22 so that when the first magnetic coupling part 22 is arranged inside the housing 20 against the first surface 20a of the housing 20 or in the vicinity of the first surface 20a, the through hole extends through the first magnetic coupling part 22 in the direction from the first surface 20a of the housing 20 to the second surface 20b of the housing 20, and the optical sensor 21 arranged in the through hole is against the transparent window 23 of the housing 20 or in the vicinity of the transparent window 23 of the housing 20. According to the foregoing, the other components of the sensor part 2 are arranged inside the housing 20. The magnetic flux generated by the first magnetic coupling part 22 provides a magnetic coupling through the optical sensor 21 arranged inside the first magnetic coupling part 22 and through the transparent window and through the second magnetic coupling part 32 of the ear E and the separate connection part 3 .

[0044] In the embodiment shown in the figure, in the direction from the first surface 20a toward the second surface 20b, the optical sensor 21 and the first magnetic coupling part 22 at least partially overlap, or in the direction from the first surface 20a toward the second surface 20b, the first magnetic coupling part 22 is arranged concentrically with the optical sensor 21. This means that the magnetic flux generated by the first magnetic coupling part 22 affects through the optical sensor 21, so that the magnetic coupling between the first magnetic coupling part 22 and the second magnetic coupling part 32 provides a secure attachment between the user's ear E and the transparent window 23 through which the optical sensor 21 runs.

[0045] Figure 8An embodiment of the sensor part 2 of the body sensor 1 according to the present invention is shown, wherein the optical sensor 21, the transparent window 23 and the first magnetic coupling part 22 are directly adjacent to each other within the structure of the housing 20, so that the optical sensor 21 and the transparent window 23 are placed directly on top of each other, and the first coupling part 22 is placed so that a part of the first coupling part is placed directly on top of the transparent window 23 and the optical sensor 21, and a part of the first coupling part 22 is placed only on top of the transparent window 23. That is, in the direction from the first surface 20a towards the second surface 20b, the optical sensor 21, the transparent window 23 and the first magnetic coupling part 22 are arranged directly adjacent to each other inside the housing. In this embodiment of the present invention, there are two charging pads 25, and the rechargeable battery 24 and the charging pad 25 are placed in close proximity to the optical sensor 21, the transparent window 23 and the first magnetic coupling part 22 inside the housing.

[0046] Fig. 9 Another embodiment of the sensor part 2 of the body sensor 1 according to the present invention is shown, wherein the optical sensor 21, the transparent window 23 and the first magnetic coupling part 22 are placed directly adjacent to each other within the structure of the housing 20, so that the optical sensor 21 is placed on top of the transparent window 23 and the first magnetic coupling part 22 is placed on top of the optical sensor 21, or alternatively, the first magnetic coupling part 22 is placed on top of the transparent window 23 so that the optical sensor 21 is inside the first magnetic coupling part 22. The optical sensor 21 is inside the first magnetic coupling part 22 means, for example, so that the first magnetic coupling part 22 includes a recess in which the optical sensor 21 is arranged, so that the first magnetic coupling part 22 surrounds the optical sensor 21 on the side of the optical sensor 21, but so that the optical sensor can run through the transparent window 23. That is, the surface of the first magnetic coupling part 22 facing the transparent window 23 is preferably arranged substantially on the same level as the surface of the optical sensor 21 facing the transparent window 23. Placing directly adjacent to each other within the structure of the housing 20 means that the parts can be placed directly adjacent to each other without any structure of the housing 20 between the parts, or so that only the structure of the housing 20 exists between some or all of the parts, however, no other components are provided between the optical sensor 21, the transparent window 23 and the first magnetic coupling part 22 or between the transparent window 23 and the combination of the optical sensor 21 and the first magnetic coupling part 22. Figure 6In the embodiment shown in , the optical sensor 21, the transparent window 23 and the first magnetic coupling part 22 are directly on top of each other, so that the entire optical sensor 21 is on top of the transparent window 23, and the first magnetic coupling part 22 is placed to cover the optical sensor 21. Alternatively, the transparent window 23 and the combination of the optical sensor 21 and the first magnetic coupling part 22 are directly on top of each other, so that the entire optical sensor 21 is on top of the transparent window 23, and the first magnetic coupling part 22 is arranged to surround the optical sensor 21. Then, the first magnetic coupling part 22 can be a ring-shaped magnet arranged around the optical sensor 21. In this case, the first magnetic coupling part 22 surrounds the optical sensor 21 and, when viewed from above, i.e., in a direction from the second surface 20b towards the first surface 20a, looks similar to Fig. 9 .

[0047] The invention has been described above with reference to the examples shown in the accompanying drawings. However, the invention is not in any way limited to the above examples but may vary within the scope of the claims.

Claims

1. A body sensor (1) for measuring a user's body activity, characterized in that The body sensor (1) comprises: - a sensor part (2), the sensor part (2) comprising a housing (20), the housing (20) having a first surface (20a) and a second surface (20b) opposite to the first surface (20a), the housing (20) enclosing components of the sensor part (2) inside the housing (20), the components comprising: a circuit board (26), wherein the circuit board (26) is arranged in the housing (20) between the first surface (20a) and the second surface (20b), an optical sensor (21), the optical sensor (21) being configured to measure body activity by optical measurement, the optical sensor (21) being arranged in the housing (20) between the circuit board (26) and the first surface (20a), A first magnetic coupling part (22), a transparent window (23), the transparent window (23) being arranged on the first surface (20a) of the housing (20) and directly facing the optical sensor (21), so that the transparent window (23) is configured to allow light to pass from the optical sensor (21) through the first surface (20a) to the outside of the housing (20), and from the outside of the housing through the first surface (20a) to the optical sensor (21), and one or more other components, the one or more other components being disposed inside the housing (20); and - a separate connection part (3), which is independent of the sensor part (2) and includes a second magnetic coupling part (32), the second magnetic coupling part (32) being configured to provide a magnetic coupling with the first magnetic coupling part (22) via the first surface (20a) of the housing (20) for fixing the sensor part (2) to the other side of the user's body part, wherein the other components of the sensor part (2) are arranged in parallel with the optical sensor (21); or The other components of the sensor part (2) are arranged in parallel with the first magnetic coupling part (22); or The other components of the sensor part (2) are arranged in parallel with the optical sensor (21) and the first magnetic coupling part (22), The components are arranged in the housing (20) in the following order from the first surface toward the second surface: the transparent window (23), the optical sensor (21) and the circuit board (26), and further, the first magnetic coupling part (22) is arranged to at least partially overlap with the transparent window (23) in the housing (20) between the circuit board (26) and the first surface (20a).

2. The body sensor (1) according to claim 1, characterized in that: The components are arranged in the housing (20) in the following order from the first surface toward the second surface: the transparent window (23), the optical sensor (21), the circuit board (26), and the first magnetic coupling part (22).

3. The body sensor (1) according to claim 1 or 2, characterized in that: The optical sensor (21) and the first magnetic coupling part (22) are arranged on opposite surfaces of the circuit board (26); or The circuit board (26) is arranged parallel to the first surface (20a) of the housing (20), and the optical sensor (21) and the first magnetic coupling part (22) are arranged on opposite surfaces of the circuit board (26).

4. The body sensor (1) according to claim 1 or 2, characterized in that: In a direction from the first surface (20a) toward the second surface (20b), the optical sensor (21) and the first magnetic coupling part (22) at least partially overlap, or In a direction from the optical sensor (21) toward the second surface (20b), the optical sensor (21) and the first magnetic coupling part (22) at least partially overlap.

5. The body sensor (1) according to claim 1 or 2, characterized in that: In a direction from the first surface (20a) toward the second surface (20b), the first magnetic coupling part (22) is arranged concentrically with the optical sensor (21).

6. The body sensor (1) according to claim 1, characterized in that: The other components of the sensor portion (2) also include a rechargeable battery (24) configured to provide power to the sensor portion (2).

7. The body sensor (1) according to claim 6, characterized in that: The other components of the sensor part (2) also include at least one charging pad (25) connected to the battery (24) for recharging the battery (24).

8. The body sensor (1) according to claim 7, characterized in that: The at least one charging pad (25) is arranged to extend from the second surface (20b) of the housing (20) toward the first surface (20a) and to contact the circuit board (26).

9. The body sensor (1) according to any one of claims 1, 2 and 6-8, characterized in that The optical sensor (21) includes a wireless communication component; or The circuit board (26) includes wireless communication components.

10. The body sensor (1) according to any one of claims 1, 2 and 6-8, characterized in that The body sensor (1) is an ear heart rate sensor for measuring heart rate activity from a user's ear, the heart rate sensor comprising an optical sensor (21) configured to measure heart rate activity by optical heart rate measurement, and The separate connection part (3) is independent of the sensor part (2) and includes the second magnetic connection part (32), which is configured to provide the magnetic connection with the first magnetic connection part (22) via the first surface (20a) of the shell (20) for fixing the sensor part (2) to the other side of the user's ear.

11. The body sensor (1) according to any one of claims 1, 2 and 6-8, characterized in that In the direction from the first surface (20a) toward the second surface (20b), the optical sensor (21) and the first magnetic coupling part (22) at least partially overlap, or in the direction from the first surface (20a) toward the second surface (20b), the first magnetic coupling part (22) is concentrically arranged with the optical sensor (21).

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