PATENT DOCUMENT

Publication Number: US-10206623-B2
Application Number: US-201514867230-A
Country: US
Kind Code: B2

Title: Band tightness sensor of a wearable device

Abstract:
A wearable electronic device has a processing unit and a health sensor included in a housing, a band operable to couple the housing to a body part of a user, and a tightness sensor coupled to the band. The tightness sensor is operable to produce a signal indicative of a tightness of the band on the user&#39;s body part. The processing unit determines a tightness of the band based on the signal and perform one or more actions based thereon. Such actions may include evaluating the signal for changes in the tightness of the band according to operational tolerances of the health sensor, providing output directing the user to adjust the band to improve operation of the health sensor, monitoring changes in the tightness of the band and adjusting a measurement obtained by the health sensor, and so on.

Claims:
What is claimed is: 
     
       1. A wearable device, comprising:
 a housing including a processing unit and a health sensor; 
 a band operable to couple the housing to a body part of a user; and 
 a tightness sensor, coupled to the band and communicably coupled to the processing unit, that produces a signal indicating a tightness of the band; 
 wherein the processing unit is configured to: 
 determine the tightness of the band using the signal; and 
 if the tightness of the band is outside a range of tightness values, provide output directing the user to adjust the band to improve operation of the health sensor; wherein: 
 the tightness sensor comprises first and second capacitive plates operable to change proximity with respect to each other in response to a change in the tightness of the band; and 
 the signal indicates a capacitance between the first and second capacitive plates. 
 
     
     
       2. The wearable device of  claim 1 , wherein the first and second capacitive plates are operable to change proximity with respect to each other in a direction perpendicular to a lengthwise dimension of the band. 
     
     
       3. The wearable device of  claim 1 , wherein the first and second capacitive plates are operable to change proximity with respect to each other in a direction along a lengthwise dimension of the band. 
     
     
       4. The wearable device of  claim 1 , wherein the first capacitive plate is embedded within the band. 
     
     
       5. The wearable device of  claim 4 , wherein the second capacitive plate is also embedded within the band. 
     
     
       6. A wearable device, comprising:
 a housing including a processing unit and a health sensor; 
 a band operable to couple the housing to a body part of a user; and 
 a tightness sensor, coupled to the band and communicably coupled to the processing unit, that produces a signal indicating a tightness of the band; 
 wherein the processing unit is configured to: 
 monitor changes in the tightness of the band using the signal; and 
 adjust a measurement obtained by the health sensor using the changes in the tightness of the band to account for movement of the body part; wherein: 
 the tightness sensor comprises a series of conductors positioned in the band; and 
 the signal indicates at least one of a resistance or a capacitance between conductors of the series of conductors. 
 
     
     
       7. The wearable device of  claim 6 , wherein the signal indicates the resistance between the conductors and the conductors are positioned along a lengthwise dimension of the band. 
     
     
       8. The wearable device of  claim 6 , wherein the signal indicates the capacitance between the conductors and the conductors are positioned perpendicular to a lengthwise dimension of the band. 
     
     
       9. The wearable device of  claim 6 , wherein the signal indicates both the resistance and the capacitance between the conductors. 
     
     
       10. The wearable device of  claim 6 , wherein the series of conductors includes at least three conductors. 
     
     
       11. The wearable device of  claim 6 , wherein the band surrounds the conductors. 
     
     
       12. The wearable device of  claim 6 , wherein the band surrounds at least one of the conductors. 
     
     
       13. The wearable device of  claim 6 , wherein the band separates the series of conductors when the band is unstretched. 
     
     
       14. The wearable device of  claim 6 , wherein the band separates the series of conductors when the band is stretched. 
     
     
       15. The wearable device of  claim 6 , wherein the series of conductors comprises:
 a first row; and 
 a second row; wherein: 
 the first row is positioned along a lengthwise dimension of the band above the second row. 
 
     
     
       16. The wearable device of  claim 6 , wherein the conductors comprise an isotropically conductive particles. 
     
     
       17. The wearable device of  claim 6 , wherein the conductors comprise conductive particles. 
     
     
       18. The wearable device of  claim 6 , wherein the series of conductors comprises:
 a first row; and 
 a second row; wherein: 
 the first row is positioned across from the second row along a widthwise dimension of the band. 
 
     
     
       19. A wearable device, comprising:
 a housing including a processing unit and a health sensor; 
 a band operable to couple the housing to a body part of a user; and 
 a tightness sensor, coupled to the band and communicably coupled to the processing unit, that produces a signal indicating a tightness of the band; wherein: 
 the processing unit evaluates the signal for changes in the tightness of the band according to operational tolerances of the health sensor that relate to the tightness of the band; 
 the tightness sensor comprises a capacitive plate disposed in the band operable to change proximity with respect to the body part of the user in response to a change in the tightness of the band; and 
 the signal indicates a capacitance between the capacitive plate and the body part of the user. 
 
     
     
       20. The wearable device of  claim 19 , wherein the band surrounds the capacitive plate.

Description:
FIELD 
     The described embodiments relate generally to wearable electronic devices. More particularly, the present embodiments relate to sensing the tightness of a band attaching a wearable electronic device to a user&#39;s body part associated with the operation of a health sensor. 
     BACKGROUND 
     Users frequently encounter a variety of different electronic devices in the modern world. Such electronic devices include computers, media players, entertainment systems, displays, communication systems, and so on. Many electronic devices, such as laptop computers, tablet computers, and smart phones, may be portable. 
     Some electronic devices, referred to as “wearable electronic devices,” may be configured to be worn by a user. In some cases, such a wearable electronic device may include one or more bands, straps, or other attachment mechanisms that may be used to attach the wearable electronic device to a user&#39;s body part. For example, a wrist worn wearable electronic device may include a band that can be used to secure the wearable electronic device to a user&#39;s wrist. 
     Wearable electronic devices may include a variety of components. For example, such wearable electronic devices may include various sensors, such as sensors that may be used to detect information about the user. 
     SUMMARY 
     The present disclosure relates to sensing the tightness of a band attaching a wearable electronic device to a user&#39;s body part. A wearable electronic device may have a processing unit and a health sensor included in a housing, a band operable to couple the housing to a body part of a user, and a tightness sensor coupled to the band. The tightness sensor may be operable to produce a signal indicative of a tightness of the band on the user&#39;s body part. The processing unit may determine a tightness of the band based on the signal and perform various actions such as evaluating the signal for changes in the tightness of the band according to operational tolerances of the health sensor, providing output directing the user to adjust the band to improve operation of the health sensor, monitoring changes in the tightness of the band and adjusting a measurement obtained by the health sensor, and so on. 
     In various embodiments, a wearable device may have a housing including a processing unit and a health sensor, a band operable to couple the housing to a body part of a user, and a tightness sensor that is coupled to the band and communicably coupled to the processing unit. The tightness sensor may produce a signal indicating a tightness of the band on the user&#39;s body part. The processing unit may be configured to determine the tightness of the band based on the signal and, if the tightness of the band is outside a range of tightness values, provide output directing the user to adjust the band to improve operation of the health sensor. 
     In some examples, the tightness sensor may include first and second capacitive plates that are operable to change proximity with respect to each other in response to a change in the tightness of the band. In such an example, the signal may indicate a capacitance between the first and second capacitive plates. The first and second capacitive plates may be operable to change proximity with respect to each other in a direction perpendicular to a lengthwise dimension of the band. Alternatively, the first and second capacitive plates may be operable to change proximity with respect to each other to in a direction along a lengthwise dimension of the band. 
     In various examples, the tightness sensor may include a strain gauge. The strain gauge may be positioned in the band along a lengthwise dimension of the band. The strain gauge may be positioned in a portion of the band where the band attaches to the housing and is disposed perpendicular to a direction of the attachment. 
     In some embodiments, a wearable device may have a housing including a processing unit and a health sensor, a band operable to couple the housing to a body part of a user, and a tightness sensor that is coupled to the band and is communicably coupled to the processing unit. The tightness sensor may produce a signal indicating a tightness of the band. The processing unit may be configured to monitor changes in the tightness of the band based on the signal and adjust a measurement obtained by the health sensor based on the changes in the tightness of the band to account for movement of the body part. 
     In various examples, the tightness sensor may include a pressure sensor positioned in an air bladder. The tightness of the band may be related to a pressure in the air bladder. 
     In some examples, the tightness sensor may include a series of conductors positioned in the band. In such an example, the signal may indicate at least one of a resistance or a capacitance between conductors of the series of conductors. The signal may indicate the resistance between the conductors and the conductors may be positioned along a lengthwise dimension of the band. The signal may indicate the capacitance between conductors and the conductors may be positioned perpendicular to a lengthwise dimension of the band. The signal may indicate both the resistance and the capacitance between the conductors. 
     In numerous embodiments, a wearable device may have a housing including a processing unit and a health sensor, a band operable to couple the housing to a body part of a user, and a tightness sensor that is coupled to the band and is communicably coupled to the processing unit. The tightness sensor may produce a signal indicating a tightness of the band. The processing unit may evaluate the signal for changes in the tightness of the band according to operational tolerances of the health sensor that relate to the tightness of the band. 
     In various examples, the tightness sensor may include a capacitive plate disposed in the band that is operable to change proximity with respect to the body part of the user in response to a change in the tightness of the band. The signal may indicate a capacitance between the capacitive plate and the body part of the user. 
     In some examples, the housing may include an actuator operable to produce a vibration. In such examples, the tightness sensor may detect the vibrations produced by the actuator that travel through at least one of the band or the body part of the user. 
     In various examples, the housing may include an ultrasonic transmitter operable to produce an ultrasonic signal. In such examples, the tightness sensor may include an ultrasonic receiver that receives the ultrasonic signal through the body part of the user. 
     In some examples, the tightness sensor may include a microphone. In some cases, the microphone may detect sound waves produced by relative movement of the band and the body part of the user. In various cases, the housing may include a speaker and the microphone may detect sound waves produced by the speaker. In such cases, the signal may indicate a dampening level related to the tightness of the band. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will be readily understood by the following detailed description in conjunction with the accompanying drawings, wherein like reference numerals designate like structural elements. 
         FIG. 1A  depicts a wearable electronic device that is operable to determine a tightness of a band. 
         FIG. 1B  depicts a front view of the wearable electronic device of  FIG. 1A . 
         FIG. 2  depicts an example cross-sectional view of the wearable electronic device of  FIG. 1B , taken along line A-A of  FIG. 1B . 
         FIGS. 3-13  depict additional examples of the wearable electronic device of  FIG. 2  in accordance with further embodiments. 
         FIG. 14  depicts a flow chart illustrating an example method for using a band tightness sensor with a health sensor. The method may be performed by one or more of the wearable electronic devices of  FIGS. 1A-13 . 
         FIG. 15  depicts a flow chart illustrating an example method for directing a user to adjust band tightness. The method may be performed by one or more of the wearable electronic devices of  FIGS. 1A-13 . 
         FIG. 16  depicts a flow chart illustrating an example method for adjusting a health sensor measurement based on band tightness. The method may be performed by one or more of the wearable electronic devices of  FIGS. 1A-13 . 
         FIG. 17  depicts a block diagram illustrating example components that may be utilized in the wearable electronic device and example functional relationships of those components. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to representative embodiments illustrated in the accompanying drawings. It should be understood that the following descriptions are not intended to limit the embodiments to one preferred embodiment. To the contrary, it is intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the described embodiments as defined by the appended claims. 
     The description that follows includes sample systems, methods, and computer program products that embody various elements of the present disclosure. However, it should be understood that the described disclosure may be practiced in a variety of forms in addition to those described herein. 
     The following disclosure relates to sensing the tightness of a band attaching a wearable electronic device to a user&#39;s body part. A wearable electronic device may include a housing having a processing unit and a health sensor, a band operable to couple the housing to a body part of a user, and a tightness sensor coupled to the band that produces a signal indicative of a tightness of the band on the user&#39;s body part. The processing unit may determine a tightness of the band based on the signal and perform various operations based thereon. 
     For example, the processing unit may monitor and/or evaluate the signal for changes in the tightness of the band according to operational tolerances of the health sensor that relate to the tightness of the band. By way of another example, the processing unit may provide output directing the user to adjust the band to improve operation of the health sensor if the tightness of the band is outside a range of tightness values. By way of still another example, the processing unit may monitor changes in tightness of the band and adjust a measurement obtained by the health sensor to account for movement of the body part. 
     The tightness sensor may be configured in various different implementations. For example, the tightness sensor may include one or more capacitive plates (also encompassing other shaped capacitive elements, flexible sheets, and so on) operable to change proximity with respect to each other in a direction perpendicular to or along a lengthwise dimension of the band. The capacitive plates may form a capacitor whose capacitance changes based on changes in the tightness of the band due to changes in proximity of the capacitive plates resulting from changes in the tightness of the band. By way of another example, the tightness sensor may include a strain gauge positioned in the band along a lengthwise dimension of the band or in a portion of the band where the band attaches to the housing disposed perpendicular to a direction of the attachment. In another example, the tightness sensor may include a pressure sensor positioned in an air bladder whose pressure is related to the tightness of the band. In still another example, the tightness sensor may include a series of conductors positioned in the band whose resistance and/or capacitance changes in response to changes in the tightness of the band. In yet another example, the tightness sensor may detect or receive vibrations or ultrasonic signals transmitted by a component included in the housing through the band and/or the body part of the user. In yet further examples, the tightness sensor may include a microphone that detects sound waves produced by relative movement of the band and the body part of the user and/or produced by a speaker included in the housing that are variously dampened by the tightness of the band. 
     In some implementations, the tightness sensor may be disposed in other locations rather than coupled to the band. For example, various configurations of tightness sensors may be coupled to the housing and/or included in the housing. In one example, an accelerometer may detect movement related to vibrations produced by an actuator. In another example, one or more force sensors may be positioned on a portion of a housing component coupled to the housing that contacts a user&#39;s body part when the wearable electronic device is worn. In still another example, one or more force sensors may couple the housing component to the housing. 
     These and other embodiments are discussed below with reference to  FIGS. 1A-17 . However, those skilled in the art will readily appreciate that the detailed description given herein with respect to these Figures is for explanatory purposes only and should not be construed as limiting. 
       FIG. 1A  depicts a wearable electronic device  100  that is operable to determine a tightness of a band  102 .  FIG. 1B  depicts a front view of the wearable electronic device  100  of  FIG. 1A . 
     With reference to  FIGS. 1A and 1B , the wearable electronic device  100  may include a housing  101  or main body that is operable to be coupled to a body part of a user (such as a wrist) via the band  102  or other attachment mechanism, which may include a first band segment  103 A and a second band segment  103 B. The wearable electronic device  100  may determine a tightness of the band  102  and perform one or more actions based thereon. 
       FIG. 2  depicts an example cross-sectional view of the wearable electronic device  100  of  FIG. 1B , taken along line A-A of  FIG. 1B . The wearable electronic device  100  may include a tightness sensor coupled to the first band segment  103 A and communicably connected to a processing unit  207  (such as via a printed circuit board  206  and a flex circuit  205  and/or other electrical connection). In this example, the tightness sensor may include a strain gauge  204 . 
     The strain gauge  204  may be positioned within the band segment  103 A along a lengthwise dimension of the first band segment  103 A (the dimension running from where the band segment  103 A attaches to the housing  101  to where the first band segment  103 A is operable to couple to the second band segment  103 B). Attaching the housing  101  to a user&#39;s body part may exert force on the first band segment  103 A related to elongation of the first band segment  103 A and/or the entire band  102 . This force may strain the strain gauge  204  and the processing unit  207  may receive one or more signals from the strain gauge  204  accordingly. The strain data included in such a signal or signals may be analyzed by the processing unit  207  and correlated to a tightness of the band  102 . 
     The processing unit  207  may use this determined tightness of the band  102  in a variety of ways. The processing unit  207  may use the determined tightness with a health sensor  209  that provides measurements or other data related to the user&#39;s body to the processing unit  207  via the printed circuit board  206  and the flex circuit  208  and/or other electrical connection. 
     By way of example, the health sensor  209  may be a photoplethysmogram (PPG) sensor mounted on a sensor plate  211  or other housing component coupled to the housing  101 , such as via adhesive  210 . Such a health sensor  209  may emit light through sensor windows  212  in the sensor plate  211  into the user&#39;s body part and receive the portion of the transmitted light that is reflected back. The health sensor  209  may transmit measurements regarding the received light to the processing unit  207 . 
     The health sensor&#39;s  209  operation may be related to the tightness of the band  102 . For example, the health sensor  209  may transmit less accurate measurements if the band  102  is too loose (and/or too tight). Operational tolerances of the health sensor  209  may make the health sensor accurate if the tightness of the band  102  is within a range of tightness values, such as not too loose and/or not too tight. Further, flexing and/or other movement of the user&#39;s body part that may change tightness of the band  102  may be incorrectly measured by the health sensor  209  as data relating to other phenomenon, such as blood flow. 
     In various implementations, the processing unit  207  may evaluate the determined tightness for changes according to operational tolerances of the health sensor  209 . The operational tolerances may be operational tolerances of the health sensor  209  that relate to tightness of the band  102 , such as whether or not the band  102  is too loose or too tight for the health sensor  209  to operate accurately or whether the user&#39;s body part is moving too much for the health sensor  209  to measure accurately. 
     In some implementations, the processing unit  207  may determine the tightness of the band  102  and provide output directing the user to adjust the first band segment  103 A to improve operation of the health sensor  209  if the tightness is outside a range of tightness values. The range of tightness values may represent tightnesses in which the health sensor  209  accurately, or more accurately, operates. Such output may be a visual output via a display component included in the housing  101 , an audio output via a speaker or other acoustic component included in the housing  101 , a haptic output via a vibration device or other actuator included in the housing  101 , a combination of various outputs, and so on. 
     In various implementations, the processing unit  207  may monitor changes in the tightness of the band  102  and adjust measurements obtained by the health sensor  209 . The processing unit  207  may adjust the measurements based on the changes in tightness of the band, such as to account for movement of the user&#39;s body part. 
     For example, the health sensor  209  may provide measurements to the processing unit  207  that the processing unit  207  may analyze to determine blood flow in the user&#39;s body part. However, movement of the user&#39;s body part (such as movement of a wrist related to a user repeatedly clenching his first) may be measured by the health sensor  209  such that the processing unit  207  misinterprets such measurements as related to blood flow. In such a case, flexing of the user&#39;s wrist may be interpreted by the processing unit  207  as the user&#39;s pulse rate. Such movement may not be detectable by other movement sensors such as accelerometers, as flexing movements may not change the actual position of the housing  101  and/or other components despite the fact that movement is occurring. 
     To correct for such movement, the processing unit  207  may screen out measurements corresponding to changes in the tightness of the band  102 . In this way, measurements related to actual blood flow may be analyzed in determining blood flow while measurements related to flexing or other similar movement may not be analyzed, resulting in a more accurate determination of information using the health sensor  209 . 
     The strain gauge  204  may be configured to measure strain experienced in multiple directions. For example, the strain gauge  204  may measure strain experienced in the lengthwise direction of the band  102  and strain experienced in the widthwise direction of the band  102  (perpendicular to the lengthwise direction). Measuring strain in multiple directions may allow for screening out of erroneous strain data that relates to temperature variations in the band  102  as opposed to strain data relating to elongation of the band  102  due to tightness. 
     In some cases, the strain gauge  204  may experience strain due to bending of the band  102  unrelated to the tightness of the band  102 . The processing unit  207  may analyze the strain data included in the signal received from the strain gauge  204  to determine strain data indicating of bending as opposed to tightness. In implementations where the processing unit  207  so analyzes the strain data, the processing unit  207  may disregard strain data related to bending as opposed to tightness in determining the tightness of the band  102 . 
     Although the strain gauge  204  is illustrated as embedded in the middle of the first band segment  103 A, it is understood that this is an example. In various implementations, the strain gauge  204  may be disposed on a top surface of the first band segment  103 A, a bottom surface of the first band segment  103 A, and/or otherwise positioned. For example, in various implementations, the strain gauge  204  may include both a strain gauge positioned on a top surface of the first band segment  103 A and a strain gauge positioned in a bottom surface of the first band segment  103 A in order to more granularly determine the strain experienced at various portions of the band  102  that may relate to the tightness of the band  102 . 
       FIGS. 3-13  depict additional examples in accordance with further embodiments. These additional examples are elaborated in detail below. 
     As contrasted with  FIG. 2 , the example depicted in  FIG. 3  positions a strain gauge  304  in a portion of the first band segment  303 A where the first band segment  303 A attaches to the housing  301 . In this example, the attachment is in a direction perpendicular to the lengthwise dimension of the band. 
     As illustrated, a portion of the housing  301  (and/or associated components) partially surrounds the portion of the first band segment  303 A to keep the first band segment  303 A coupled to the housing  301  unless the first band segment  303 A is moved in a direction perpendicular to the direction of the attachment. As such, tightness of the band  302  may strain the portion of the first band segment  303 A (due to how the housing  301  resists decoupling of the first band segment  303 A in that direction). This strain may be experienced by the strain gauge  304  and the strain gauge  304  may transmit signals including strain data to the processing unit  307  accordingly via the flex circuit  305  and/or other electrical connection and the printed circuit board  306 . 
     Although this example illustrates and describes the strain gauge  304  as positioned in the portion of the first band segment  303 A, it is understood that this is an example. In various implementations, the strain gauge  304  may be positioned on and/or in a portion of the housing  301  adjacent the portion of the first band segment  303 A instead of on and/or in the portion of the first band segment  303 A. 
     By way of another example, in some implementations, the first band segment  303 A and/or the housing  301  may include various retaining structures operable to resist decoupling of the housing  301  and the first band segment  303 A. For example, the first band segment  303 A may include a tab that projects to engage a recess of the housing  301  when the first band segment  303 A is coupled to the housing  301 . In such an example, the tab may be strained by tightness of the band  302  and the strain gauge  304  may be positioned on and/or within the tab. 
       FIG. 4A  depicts an example in accordance with further embodiments where the tightness sensor includes first and second capacitive plates  413  and  414  that are operable to change proximity with respect to each other in response to a tightness of the band  402 .  FIG. 4B  depicts tightening of the band  402 , resulting in the first and second capacitive plates  413  and  414  moving closer to each other. 
     With reference to  FIGS. 4A and 4B , as the first and second capacitive plates  413  and  414  change proximity with respect to each other, the capacitance between the first and second capacitive plates  413  and  414  may change. In this example, the processing unit  407  positioned within the housing  401  may receive a signal from the first or the second capacitive plate  413  and  414  via the flex circuit  405  and/or other electrical connection and the printed circuit board  406 . The signal may include the capacitance, and thus the proximity between the first and second capacitive plates  413  and  414 . The processing unit  407  may correlate the capacitance to a tightness of the band  402 . 
     Although this example is illustrated and described as including both the first capacitive plate  413  and the second capacitive plate  414 , it is understood that this is an example. In various implementations, the tightness sensor may include a single capacitive plate that changes proximity with respect to the user&#39;s body part in response to changes in tightness of the band  402 . In such an example, the capacitance may be between the single capacitive plate of the first band segment  403 A and the user&#39;s body part. 
     Further, the first and second capacitive plates  413  and  414  are illustrated as oriented such that they are operable to change proximity with respect to each other in a direction perpendicular to the lengthwise dimension of the band  402 . However, it is understood that this is an example and that the first and second capacitive plates  413  and  414  may be disposed otherwise in other implementations. 
     For example,  FIG. 5  depicts an example where first and second capacitive plates  513  and  514  are disposed in the first band segment  503 A such that they are operable to change proximity with respect to each other in a direction along the lengthwise dimension of the band  502 . This change in proximity may be indicated in the signal received by the processing unit  507  via the flex circuit  505  and/or other electrical connection and the printed circuit board  506 . 
     Although this example is illustrated and described as including both the first capacitive plate  513  and the second capacitive plate  514 , it is understood that this is an example. In various implementations, the tightness sensor may include a single capacitive plate that changes proximity with respect to the housing  501  in response to changes in tightness of the band  502 . In such an example, the capacitance may be between the single capacitive plate of the first band segment  503 A and the housing  501 . 
       FIG. 6A  depicts another example in accordance with further embodiments where the tightness sensor includes a series of conductors  615  (which may be conductive particles) positioned in the first band segment  603 A.  FIG. 6B  depicts tightening of the band  602 , resulting in the series of conductors  615  moving further apart from each other (and/or changing dimensions) due to band stretching. 
     The series of conductors  615  may be connected to the printed circuit board  606  disposed in the housing  601 , and thus the processing unit  607 , at a first end by the flex circuit  605  and/or other electrical connection and at a second end by a conductor  616  coupled to the flex circuit  605 . In this way, the signal may include an indication of a resistance and/or a capacitance across the series of conductors  615 . The resistance and/or capacitance across the series of conductors  615  may be dependent on a tightness of the band  602 . 
     For example, with respect to  FIGS. 6A-6B , tightening of the band  602  may cause the series of conductors  615  to move further apart. This may cause a resistance across the series of conductors  615  to increase. Conversely, loosening of the band  602  may allow the series of conductors  615  to move closer together. This may cause the resistance to decrease. As such, the processing unit  607  may receive the signal and correlate resistance included in the signal to a tightness of the band  602 . 
     Although a resistance of the series of conductors  615  is described, it is understood that this is an example. In other implementations, one or more other electrical properties of the series of conductors  615  may be used without departing from the scope of the present disclosure, such as capacitance. 
     As shown, the series of conductors  615  is a single row of conductors  615  positioned along the lengthwise dimension of the band  602 . However, it is understood that this is an example. In various implementations, other configurations may be used. 
     For example, multiple rows of conductors  615  may be positioned above and below each other along the lengthwise dimension of the band  602 . As such, tightening of the band  602  may cause conductors  615  adjacent to each other along the lengthwise dimension of the band  602  in one of the rows to move further apart from each other, increasing the resistance between those conductors  615 . However, this may cause adjacent rows of conductors  615  above and below each other to at the same time move closer, decreasing the resistance between such adjacent rows of conductors  615 . In such an implementation, resistances between conductors  615  in multiple directions may be measured and compared. An increase in resistance in a first direction and a decrease in a second direction may indicate increased tightness whereas a decrease in the first direction and an increase in the second direction indicate decreased tightness. This may allow greater granularity of measurement than in single row implementations, which may allow for greater granularity in determining band  602  tightness. 
     Alternatively, the series of conductors  615  may be arranged in this way but may be formed of anisotropically conductive particles (such as conductive in the lengthwise direction of the band but not in other directions). In this way, multiple rows may be used without resistance increasing in one direction and decreasing in another. 
     Further, rather than multiple rows of conductors  615  positioned above and below each other along the lengthwise dimension of the band  602  (and/or in addition to such), one or more rows of conductors  615  may be positioned along the widthwise dimension of the band  602 . Resistances, capacitances, and/or other electrical properties across such series of conductors  615  may be monitored as discussed in the other examples above. 
     For example, rather than a single row of conductors  615  positioned along the lengthwise dimension of the band  602 , a single row of conductors  615  may be positioned along the widthwise dimension of the band (perpendicular to the lengthwise dimension of the band  602 ). The capacitance across the conductors  615  may be measured where an increase indicates tightening of the band  602  and a decrease indicates loosening of the band  602 . 
     Various configurations of conductors  615  are possible and contemplated without departing from the scope of the present disclosure. Further, various electrical properties of the conductors  615  may be monitored and correlated to tightness of the band  602 . For example, in some implementations both capacitance and resistance may be measured. 
       FIG. 7  depicts another example in accordance with further embodiments where the tightness sensor includes a pressure sensor  719  (such as a barometric pressure sensor) positioned in an air bladder  718  (or other cavity) formed by walls  716  and a surface  717 . The pressure sensor  719  may transmit signals to the processing unit  707  via the flex circuit  705  and/or other electrical connection and printed circuit board  706  indicating a pressure (such as barometric pressure) in the air bladder  718 . The processing unit  707  may correlate the pressure to a tightness of the band  702 . 
     For example, tightening of the band  702  may increase the force exerted between the user&#39;s body part and the surface  717 . This may increase the pressure in the air bladder  718 . Conversely, loosening of the band  702  may decrease the force exerted between the user&#39;s body part and the surface  717 . This may decrease the pressure in the air bladder  718 . Changes in pressure in the air bladder  718  may be indicated in the signals transmitted to the processing unit  707 . 
     In some implementations, one or more components may be coupled to the first band segment  703 A and/or the housing  701  that are operable to fill and/or empty the air bladder  718 . For example, such a component may include an air compressor, a compressed air cartridge, a valve, and so on. 
       FIG. 8  depicts another example in accordance with further embodiments where the tightness sensor includes a sensor  821  coupled to the first band segment  803 A that detects vibrations produced by an actuator  820  disposed on and/or within the housing  801 . The signal received by the processing unit  807  via the printed circuit board  806  and the flex circuit  805  and/or other electrical connection may indicate the vibrations received by the sensor  821 . The processing unit  807  may correlate the signal to a tightness of the band  802 . 
     The vibrations may travel along and/or through  823  in the first band segment  803 A and/or through  822  the body part of the user  824  (such as the user&#39;s wrist). Variables involved in the vibrations that are received (such as time, phase shift, dampening, frequency, amplitude, and so on) may be influenced by the tightness of the band  802  and may indicate how tight or loose the band  802  is. As such, the processing unit  807  may analyze the data regarding the received vibrations and correlate the data to a tightness of the band  802 . 
     By way of contrast,  FIG. 9  depicts an example where the tightness sensor includes an ultrasonic receiver  925  coupled to the first band segment  903 A that detects ultrasonic signals produced by an ultrasonic transmitter  926  disposed on and/or within the housing  901 . The signal received by the processing unit  907  via the printed circuit board  906  and the flex circuit  905  and/or other electrical connection may indicate the vibrations received by the ultrasonic receiver  925 . The processing unit  907  may correlate the signal to the tightness of the band  802 . 
     The ultrasonic signals may travel through  927  the body part of the user  924 . Variables involved in the ultrasonic signals that are received (such as time, phase shift, dampening, frequency, amplitude, and so on) may be influenced by the tightness of the band  902  and may indicate how tight or loose the band  902  is. As such, the processing unit  907  may analyze the data regarding the received ultrasonic signals and correlate the data to a tightness of the band  902 . 
     However, it is understood that this is an example. In various implementations, sound waves other than ultrasonic signals may be used without departing from the scope of the present disclosure. 
       FIG. 10  depicts another example in accordance with further embodiments where the tightness sensor includes a microphone  1028  or other sound wave detector positioned in the first band segment  1003 A. The microphone  1028  may receive sound waves produced by relative movement of the band  602  and the body part of the user. The microphone  1028  may transmit signals regarding received sound waves to the processing unit  1007  via the printed circuit board  1006  and the flex circuit  1005  and/or other electrical connection. The processing unit  1007  may analyze the data regarding sound waves in the signal to determine the tightness of the band  1002 . 
     The sound waves may indicate the tightness of the band  1002 . For example, the looser the band  1002 , the more the band  1002  may be able to move with respect to the user&#39;s body part. As such, more sound waves may be produced and detected by the microphone  1028 . Conversely, the tighter the band  1002 , the less the band  1002  may be able to move with respect to the user&#39;s body part. As such, fewer sound waves may be produced and detected by the microphone  1028 . The processing unit  1007  may correlate the data regarding sound waves in the signal to a tightness of the band  1002 . 
     Alternatively or additionally, sound waves may produced by a speaker  1029  included in the housing  1001 . The microphone  1028  may receive such sound waves and transmit signals regarding such to the processing unit  1007 . The microphone&#39;s  1028  receipt of the sound waves produced by the speaker  1029  may be variously dampened by the tightness of the band  1002 . 
     For example, the tighter the band  1002 , the more dampened the received sound waves may be compared to the sound waves produced. Conversely, the looser the band  1002 , the less dampened the received sound waves may be compared to the sound waves produced. The processing unit  1007  may correlate the data in the signal regarding the sound waves received versus the sound waves produced to determine the tightness of the band  1002 . 
     Although  FIGS. 1-10  are illustrated and described as including tightness sensors coupled to the first band segments  103 A- 1003 A, it is understood that these are examples. In various implementations, tightness sensors may be otherwise positioned. 
     For example,  FIG. 11  depicts an example tightness sensor including a sensor  1130  disposed in the housing  1101  instead of coupled to the first band segment  1103 A that detects vibrations produced by an actuator  1120 . The signal received by the processing unit  1107  via the printed circuit board  1106  may indicate the vibrations received by the sensor  1130 . The processing unit  1107  may correlate the signal to the tightness of the band  1102 . Variables involved in the vibrations that are received (such as time, phase shift, dampening, frequency, amplitude, and so on) may be influenced by the tightness of the band  1102  based on how much the housing  1101  may move in response to the vibrations and may indicate how tight or loose the band  1102  is. As such, the processing unit  1107  may analyze the data regarding the received vibrations and correlate the data to a tightness of the band  1102 . 
     By way of another example,  FIG. 12  depicts an example tightness sensor including force or pressure sensors  1231 A and  1231 B disposed on a surface of the sensor plate  1211  coupled to the housing  1201 . The amount of force exerted between a user&#39;s body part and the force or pressure sensors  1231 A and  1231 B may be related to the tightness of the band  1202 . As such, the processing unit  1207  may receive signals from the force or pressure sensors  1231 A and  1231 B related to the exerted force via the printed circuit board  1206  and the flex circuit  1205  and/or other electrical connections. The processing unit  1207  may correlate data in the signals related to the exerted force to determine the tightness of the band  1202 . 
     The force determined by the processing unit  1207  by analyzing signals may be a non-binary value. The processing unit  1207  may analyze the signals to determine forces across a range of force values as opposed to detecting that a threshold amount of force is exerted. The processing unit may analyze force signals to correlate data in the signals to an amount of force applied out of a range of possible forces. 
     Although  FIG. 12  illustrates force or pressure sensors  1231 A and  1231 B disposed on a surface of the sensor plate  1211 , it is understood that this is an example. Various numbers of force or pressure sensors  1231 A and  1231 B and/or other force or pressure sensors may be variously disposed without departing from the scope of the present disclosure. For example, a set of contact force sensors (which may be any kind of contact force sensors) on an inner surface of the band  1202  that faces the user&#39;s body part without departing from the scope of the present disclosure. 
     By way of still another example,  FIG. 13  depicts an example tightness sensor including a force sensor having first and second capacitive plates  1333  and  1334  disposed between the sensor plate  1311  and the housing  1301 . The amount of force exerted between a user&#39;s body part and the sensor plate  1311  may be related to the tightness of the band  1302 . As such, the processing unit  1307  may receive signals via the printed circuit board  1306  and the flex circuit  1335  and/or other electrical connections related to the exerted force. The processing unit  1307  may correlate data in the signals related to the exerted force to determine the tightness of the band  1302 . 
     The first and second capacitive plates  1333  and  1334  may be operable to change proximity with respect to each other. The first and second capacitive plates  1333  and  1334  may be coupled to each other and to the housing  1301  and the sensor plate  1311 , respectively, via adhesive  1310 . Tightening of the band  1302  may exert force between the user&#39;s body part and the sensor plate  1311 , compressing the adhesive  1310  between the first and second capacitive plates  1333  and  1334  and allowing the first and second capacitive plates  1333  and  1334  to become more proximate to each other. Conversely, loosing of the band  1302  may allow the first and second capacitive plates  1333  and  1334  to move further apart. The capacitance between the first and second capacitive plates  1333  and  1334  may change as the proximity of the first and second capacitive plates  1333  and  1334  changes. The processing unit  1307  may correlate the capacitance to a tightness of the band  1302 . 
     Although the above examples are illustrated and described in the context of attachment mechanisms such as bands for attaching wearable electronic devices to body parts of users, it is understood that this is an example. In various implementations, the disclosed techniques may be used to determine tightness of attachment mechanisms that attach electronic devices to other objects, such as a mounting apparatus operable to mount a display device to a car dash board. 
       FIG. 14  depicts a flow chart illustrating an example method  1400  for using a band tightness sensor with a health sensor. The method  1400  may be performed by one or more of the wearable electronic devices of  FIGS. 1A-13 . 
     At  1410 , a signal may be received from a tightness sensor. The tightness sensor may be coupled to the band of a wearable electronic device that is operable to couple the wearable electronic device to the body part of a user. The signal may include data indicative of a tightness of the band. 
     At  1420 , a tightness of the band may be determined based on the signal. A processing unit may correlate data in the signal to band tightness. 
     At  1430 , the determined tightness may be evaluated according to operational tolerances of a health sensor. For example, if the determined tightness is outside an operational range of the health sensor for optimal or accurate health sensor operation, instructions to adjust the band may be output to a user. By way of another example, the determined tightness may indicate changes in tightness caused by user body part movement that may be interpreted by the health sensor as indicative of other health information related to the user&#39;s body part. In such an example, the processing unit may use the determined tightness to screen out erroneous data from health information determinations. 
     Although the example method  1400  is illustrated and described as including particular operations performed in a particular order, it is understood that this is an example. In various implementations, various orders of the same, similar, and/or different operations may be performed without departing from the scope of the present disclosure. 
     For example, the example method  1400  is described as receiving the signal from a tightness sensor coupled to a band of a wearable electronic device. However, in various implementations, the tightness sensor may be otherwise coupled. For example, the tightness sensor may be coupled to a housing or main body of the wearable electronic device without departing from the scope of the present disclosure. 
       FIG. 15  depicts a flow chart illustrating an example method  1500  for directing a user to adjust band tightness. The method  1500  may be performed by one or more of the wearable electronic devices of  FIGS. 1A-13 . 
     At  1510 , a signal may be received from a tightness sensor. The tightness sensor may be coupled to the band of a wearable electronic device that is operable to couple the wearable electronic device to the body part of a user. The signal may include data indicative of a tightness of the band. At  1520 , a tightness of the band may be determined based on the signal. A processing unit may correlate data in the signal to a band tightness. 
     At  1530 , it may be determined whether or not the determined tightness of the band is within a range of tightness values. The range of tightness values may be a range of band tightnesses within which a health sensor accurately or optimally operates. For example, the range of tightness values may be a range of tightnesses that are defined as not too tight and not too loose. If the tightness is not outside the range of tightness values, the flow may return to  1510  where the signal continues to be received. Otherwise, the flow may proceed to  1540 . 
     At  1540 , adjustment direction output may be provided. The adjustment direction output may include a visual output, an audio output, a haptic output such as vibrations, a combination of various outputs, and so on. In some examples, the output may indicate that the band tightness is outside the range of tightness values and should be adjusted to improve health sensor operation. In other examples, the output may specify whether the band should be tightened or loosened. In various examples, the adjustment direction output may be transmitted to one or more other electronic devices. 
     Although the example method  1500  is illustrated and described as including particular operations performed in a particular order, it is understood that this is an example. In various implementations, various orders of the same, similar, and/or different operations may be performed without departing from the scope of the present disclosure. 
     For example, the example method  1500  is illustrated and described as providing adjustment direction output. However, in various implementations, the band may include one or more tightness adjustment mechanisms controllable by the processing unit, such as a memory wire that is operable to tighten and/or loosen the band under the application of electrical current. In such an implementation, the processing unit may control the tightness adjustment mechanism to adjust tightness of the band to be within the range of tightness values rather than instructing a user to adjust the band. 
       FIG. 16  depicts a flow chart illustrating an example method  1600  for adjusting a health sensor measurement based on band tightness. The method  1600  may be performed by one or more of the wearable electronic devices of  FIGS. 1A-13 . 
     At  1610 , a signal may be received from a tightness sensor. The tightness sensor may be coupled to the band of a wearable electronic device that is operable to couple the wearable electronic device to the body part of a user. The signal may include data indicative of a tightness of the band. At  1620 , a tightness of the band may be determined based on the signal. A processing unit may correlate data in the signal to a tightness of the band. 
     At  1630 , the determined tightness may be monitored for changes. For example, the determined tightness may be compared to the previous determined tightness, or to a sequence of previous determined tightnesses, to determine whether or not the determined tightness has changed. The determined tightness may have changed if the band became tighter or looser since a previous determined tightness. 
     At  1640 , it may be determined whether or not the determined tightness has changed. If not, the flow may return to  1610  where the signal continues to be received. Otherwise, the flow may proceed to  1650 . 
     At  1650 , measurements obtained from a health sensor may be adjusted based on the determined changes. For example, changes in tightness may be caused by user body part movement and may be interpreted by the health sensor as indicative of other health information related to the user&#39;s body part. In such an example, the determined tightness changes may be used to screen out erroneous data from health information determinations. 
     By way of another example, a health sensor may not obtain accurate measurement when the user&#39;s body part is moving. In such an example, any health sensor measurements obtained when the tightness was determined to have changed may be disregarded in favor of measurements obtained when the tightness was not determined to have changed. This may result in more accurate determinations based measurements from the health sensor. 
     Although the example method  1600  is illustrated and described as including particular operations performed in a particular order, it is understood that this is an example. In various implementations, various orders of the same, similar, and/or different operations may be performed without departing from the scope of the present disclosure. 
     For example, the example method  1600  is illustrated and described as adjusting measurements obtained from the health sensor based on changes in band tightness. However, in some implementations, measurements obtained from a health sensor may be scaled and/or otherwise adjusted based on determined band tightness without regard to whether or not the tightness of the band is determined to change over time. 
     By way of another example, the example method  1600  is illustrated and described as being performed continuously. However, in various implementations, one or more portions of the method may be performed at various times, intervals, and so on. For example, in some implementations, the example method  1600  may be performed when the health sensor is operating. In other implementations, the example method  1600  may be performed at particular specified times or intervals (which may be user specified). In still other implementations, the example method  1600  may be performed in response to user input indicating to perform the example method  1600 . 
       FIG. 17  shows a block diagram illustrating example components that may be utilized in the wearable electronic device  100  of  FIGS. 1A-1B  and example functional relationships of those components. The wearable electronic device  100  may include one or more processing units  1751 , tightness sensors  1752  (such as those discussed above), storage media  1753  (such as a magnetic storage medium, an optical storage medium, a magneto-optical storage medium, a read only memory, a random access memory, an erasable programmable memory, and so on), one or more other sensors  1754  (such as one or more health sensors, accelerometers, gyroscopes, light sensors, cameras, proximity sensors, touch sensors, and so on), one or more input/output devices  1755  (such as one or more displays, speakers, haptic devices, and so on), communication component  1756 , and/or other components. The processing unit  1751  may execute instructions stored in the storage media  1753  in order to perform various operations discussed above. 
     For example, the processing unit  1751  may receive health data from a health sensor  1754  and may store such health data in the storage media  1754 . By way of another example, the processing unit  1751  may receive signals from the tightness sensor(s)  1752  and may utilize lookup tables stored in the storage media  1754  to correlate signals to the tightnesses of a band, adjust a measurement obtained from a health sensor, evaluate the signal for changes in the tightness of the band according to operational tolerances of the health sensor that relate to the tightness of the band (which may be stored in the storage media  1754 ), and so on. The processing unit  1751  may store data regarding such signals, determined tightnesses, history of determined tightnesses, operational tolerances of the health sensor, and so on in the storage media  1754 . In examples where the processing unit  1751  determines the tightness of a band, the processing unit  1751  may compare the determined tightness of the band to tightness ranges stored in the storage media  1754  to determine whether or not the determined tightness is within such a range of tightness values. The processing unit  1751  may also provide output (such as a visual output, an audio output, a haptic output, a combination of various outputs, and so on) to a user via the input/output devices  1755  to adjust the band (such as to improve operation of a health sensor). 
     The wearable electronic device  100  may communicate with one or more other electronic devices, such as the electronic device  1750 , via the communication component  1756  over one or more wired and/or wireless communication connections. Similar to the wearable electronic device  100 , the electronic device  1750  may include one or more communication components  1757 , processing units  1758 , storage media  1759 , and/or other components. In various examples, the wearable electronic device  100  may transmit data and/or notifications regarding data to the electronic device  1750  via the communication components  1756  and  1757 , such as the above discussed health data, signals, output directed to adjust band tightness, determined band tightnesses, history of determined tightnesses, operational tolerances of the health sensor, and so on. The processing unit  1758  may store such data or notifications in the storage media  159 . 
     Alternatively and/or additionally, in some examples, the wearable electronic device  100  and the electronic device  1750  may be configured in a cooperative computing arrangement. As such, the electronic device  1750  may utilize the processing unit  1758  to process the data in one or more of the various ways the processing unit  1751  is described processing such data above. For example, the processing unit  1758  may process received health data to determine health information for a user of the wearable electronic device  100 . By way of another example, the storage media  1759  may store one or more lookup tables described above, operational tolerances of the health sensor, and/or other information. As such, the processing unit  1758  may receive signals and utilize the lookup tables to correlate signals to the tightnesses of a band, adjust a measurement obtained from a health sensor, evaluate the signal for changes in the tightness of the band according to operational tolerances of the health sensor that relate to the tightness of the band, and so on. The processing unit  1758  may store the results of such determinations in the storage media  1759 , transmit such results to the wearable electronic device  100 , and/or perform various other operations 
     As described above and illustrated in the accompanying figures, the present disclosure relates to sensing the tightness of a band attaching a wearable electronic device to a user&#39;s body part. A wearable electronic device may include a housing having a processing unit and a health sensor, a band operable to couple the housing to a body part of a user, and a tightness sensor coupled to the band that produces a signal indicative of a tightness of the band on the user&#39;s body part. The processing unit may determine a tightness of the band based on the signal and perform various operations based thereon. For example, the processing unit may evaluate the signal for changes in the tightness of the band according to operational tolerances of the health sensor that relate to the tightness of the band. By way of another example, the processing unit may provide output directing the user to adjust the band to improve operation of the health sensor if the tightness of the band is outside a range of tightness values. By way of still another example, the processing unit may monitor changes in tightness of the band and adjust a measurement obtained by the health sensor to account for movement of the body part. 
     In the present disclosure, the methods disclosed may be implemented as sets of instructions or software readable by a device. Further, it is understood that the specific order or hierarchy of steps in the methods disclosed are examples of sample approaches. In other embodiments, the specific order or hierarchy of steps in the method can be rearranged while remaining within the disclosed subject matter. The accompanying method claims present elements of the various steps in a sample order, and are not necessarily meant to be limited to the specific order or hierarchy presented. 
     The described disclosure may be provided as a computer program product, or software, that may include a non-transitory machine-readable medium having stored thereon instructions, which may be used to program a computer system (or other electronic devices) to perform a process according to the present disclosure. A non-transitory machine-readable medium includes any mechanism for storing information in a form (e.g., software, processing application) readable by a machine (e.g., a computer). The non-transitory machine-readable medium may take the form of, but is not limited to, a magnetic storage medium (e.g., floppy diskette, video cassette, and so on); optical storage medium (e.g., CD-ROM); magneto-optical storage medium; read only memory (ROM); random access memory (RAM); erasable programmable memory (e.g., EPROM and EEPROM); flash memory; and so on. 
     The foregoing description, for purposes of explanation, used specific nomenclature to provide a thorough understanding of the described embodiments. However, it will be apparent to one skilled in the art that the specific details are not required in order to practice the described embodiments. Thus, the foregoing descriptions of the specific embodiments described herein are presented for purposes of illustration and description. They are not targeted to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to one of ordinary skill in the art that many modifications and variations are possible in view of the above teachings.

Metadata:
Filing Date: 20150928
Publication Date: 20190219
Grant Date: 20190219
Priority Date: 20150928
Inventors: HARRISON-NOONAN, TOBIAS J.
LEE, ALEX M.
Assignee: APPLE INC
CPC Classifications: [{"code": "A61B2562/0204", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/1118", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B2562/0247", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/02438", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/6843", "inventive": true, "first": true, "tree": "[]"}, {"code": "A61B2562/0247", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B2562/0261", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/1118", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/681", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B2562/0261", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/6843", "inventive": true, "first": true, "tree": "[]"}, {"code": "A61B2562/0204", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/681", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/02438", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/6831", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/6831", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/6843", "inventive": true, "first": true, "tree": "[]"}, {"code": "A61B2562/0204", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B2562/0247", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/6831", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/02438", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B5/681", "inventive": true, "first": false, "tree": "[]"}, {"code": "A61B2562/0261", "inventive": false, "first": false, "tree": "[]"}, {"code": "A61B5/1118", "inventive": false, "first": false, "tree": "[]"}]
Family ID: 58408484