Vital sign monitor position adjustment method, head mounted display device and storage medium

Abstract

The present invention discloses a method for adjusting the position of a vital sign monitor, a head mounted display device and a storage medium, wherein the method for adjusting the position of a vital sign monitor is used for a head mounted display device, and the method for adjusting the position of a vital sign monitor comprises: obtaining a size variable of the head circumference of the device, and generating a follow-up displacement according to the size variable; sending the follow-up displacement to a driving member, so that the driving member drives the vital sign monitor to move a displacement value corresponding to the follow-up displacement. The technical solution of the present invention can improve the monitoring accuracy of the vital sign monitor on the head mounted display device.

Description

Technical Field

[0001] The present invention relates to the technical field of head mounted display devices, and in particular to a method for adjusting the position of a vital sign monitor, a head mounted display device and a storage medium. Background Art

[0002] With the development of modern science and technology, head-mounted display devices such as VR (Virtual Reality) devices, AR (Augmented Reality) devices and MR (Mediated Reality) devices are becoming more and more widely used.

[0003] When a user uses a head-mounted display device, they can usually use the strap assembly on the device to adjust the device's head circumference to an appropriate length, but the vital sign monitor on the device cannot be adjusted, which makes the vital sign monitor unable to fit the user well and leads to low monitoring accuracy of the vital sign monitor. Therefore, how to improve the monitoring accuracy of the vital sign monitor is an urgent problem to be solved today. Summary of the invention

[0004] The main purpose of the present invention is to provide a method for adjusting the position of a vital sign monitor, aiming to improve the monitoring accuracy of the vital sign monitor on a head-mounted display device.

[0005] To achieve the above-mentioned object, the present invention provides a method for adjusting the position of a vital sign monitor, which is used in a head-mounted display device. The head-mounted display device includes a vital sign monitor. The method for adjusting the position of the vital sign monitor includes:

[0006] Obtaining a size variable of a head circumference of the device, and generating a follow-up displacement according to the size variable;

[0007] The following displacement is sent to a driving member, so that the driving member drives the vital sign monitor to move a displacement value corresponding to the following displacement.

[0008] In one embodiment, before the step of obtaining the size variables of the device head circumference, the method for adjusting the position of the vital sign monitor also includes: when the vital sign monitor is activated, obtaining the device head circumference size at this time, and generating an activation displacement amount according to the device head circumference size; sending the activation displacement amount to the driving member to drive the vital sign monitor to move the displacement value corresponding to the activation displacement amount.

[0009] In one embodiment, before the step of obtaining the size variables of the device head circumference, the method for adjusting the position of the vital sign monitor also includes: when the vital sign monitor is activated, obtaining the user wearing parameters, and generating an activation displacement according to the user wearing parameters; sending the activation displacement to the driving member to drive the vital sign monitor to move the displacement value corresponding to the activation displacement.

[0010] In one embodiment, the step of obtaining the size variable of the device head circumference and generating a follow-up displacement based on the size variable includes: obtaining the actual displacement of the vital sign monitor the last time it moved, and comparing it with the last preset displacement; if the actual displacement is equal to the preset displacement, then using the current preset displacement as the current follow-up displacement.

[0011] In one embodiment, after the step of obtaining the actual displacement of the vital sign monitor last time and comparing it with the last preset displacement, the vital sign monitor position adjustment method also includes: if the actual displacement is less than the preset displacement, recording the actual displacement; and using the actual displacement as the current follow-up displacement.

[0012] In one embodiment, the method for adjusting the position of the vital sign monitor further includes: when the external pressure on the vital sign monitor exceeds a pressure threshold, sending an emergency stop signal to the driving member to stop the movement of the vital sign monitor.

[0013] In one embodiment, the method for adjusting the position of the vital sign monitor further includes: sending a storage signal to the driving member to drive the vital sign monitor to move to a storage state.

[0014] In one embodiment, the ratio of the following displacement to the size variable ranges from 0.11 to 0.12.

[0015] The present invention also proposes a head-mounted display device, including a processor and a memory electrically connected to the processor, wherein the memory stores a vital sign monitor position adjustment program that can be run on the processor, and when the vital sign monitor position adjustment program is executed by the processor, the various steps of the aforementioned vital sign monitor position adjustment method are implemented.

[0016] The present invention further proposes a storage medium, wherein the storage medium stores a vital sign monitor position adjustment program, and when the vital sign monitor position adjustment program is executed by a processor, each step of the aforementioned vital sign monitor position adjustment method is implemented.

[0017] The technical solution of the present invention controls the displacement of the vital sign monitor by changing the size of the device head circumference, so that the position of the vital sign monitor relative to the user can be adjusted, and when the user adjusts the length of the device head circumference to an appropriate size, the vital sign monitor can fit well on the user's skin, thereby avoiding the problem of inaccurate monitoring caused by the vital sign monitor not fitting the user's skin, thereby ensuring that the vital sign monitor can work well and improving the monitoring accuracy of the vital sign monitor. In addition, by associating the displacement of the vital sign monitor with the size variable of the device head circumference, it is convenient for the user to only adjust the device head circumference, and the effect of adjusting the device head circumference size and the extension length of the vital sign monitor can be achieved at the same time, thereby improving the convenience of using the vital sign monitor and improving the convenience of wearing the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A structural schematic diagram of an embodiment of a head mounted display device of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of a head mounted display device being worn on a head;

[0021] Figure 3 for Figure 1 A schematic diagram of a head mounted display device worn on another head;

[0022] Figure 4 for Figure 3 Another schematic diagram of the head mounted display device being worn on another head;

[0023] Figure 5 It is a schematic diagram of the steps of an embodiment of a method for adjusting the position of a vital sign monitor of the present invention;

[0024] Figure 6 It is a structural diagram of the hardware operating environment involved in an embodiment of the head mounted display device of the present invention.

[0025] Description of Figure Numbers:

[0026] Label name Label name 10 Equipment body 22 Adjustment wheel 20 Strap assembly 30 Drive parts 21 Bandage 40 Vital Signs Monitor

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Reference Figures 1 to 4 In one embodiment of the head mounted display device of the present invention, the head mounted display device comprises:

[0032] Device body 10;

[0033] The strap assembly 20 is connected to both ends of the device body 10 and defines a wearing space together with the device body 10, and the wearing space is used for the user to wear the strap assembly on the head;

[0034] A head circumference detection member, used to detect the size variation of the strap assembly 20;

[0035] A driving member 30, provided on the strap assembly 20 and electrically connected to the head circumference detection member; and

[0036] The vital sign monitor 40 is driven and connected to the driving member 30 and can be moved close to or away from the user's head, so that the vital sign monitor 40 can reach a suitable working position and be comfortable for the user to wear.

[0037] Specifically, the vital sign monitor 40 can be a heart rate monitoring module, a body temperature detection module, etc. For example, when the heart rate monitoring module uses a PPG (photoplethysmograph) sensor, the PPG sensor needs to be against the user's skin to work properly. For example, the body temperature detection module also needs to be against the skin near the user's ear to work properly. The structure of the strap assembly 20 has various forms. For example, in this embodiment, the strap assembly 20 includes at least two straps 21 and an adjustment wheel 22. One end of the strap 21 is provided on the device body 10, and the other end is drivingly connected to the adjustment wheel 22. The adjustment wheel 22 is used to drive at least two straps 21 to move closer or farther away from each other to adjust the head circumference size. Specifically, a plurality of adjusting convex teeth may be provided at the end of one strap 21 close to another strap 21, and the plurality of adjusting convex teeth are spaced apart along the length direction of the strap 21. The adjusting wheel 22 is provided with a gear portion that can mesh with the adjusting convex teeth. By rotating the adjusting wheel 22, the adjusting convex teeth can be driven to move, so that the two straps 21 are brought closer to or away from each other, and the length of the strap assembly 20 is adjusted. Of course, in other embodiments, the strap assembly can also be configured as an elastic bandage group including at least two elastic bandages, and a magic buckle is provided at the end of the elastic bandage to facilitate the user to adjust the length of the elastic bandage.

[0038] Without loss of generality, since the two ends of the strap assembly 20 are close to the device body 10, when the length of the strap assembly 20 is adjusted, the distance between the two ends of the strap assembly 20 will basically not change. Therefore, when the head mounted display device is correctly worn on the user's head, there is a certain gap between the end of the strap assembly 20 and the user's forehead skin. In this embodiment, the change of this gap caused by the adjustment of the length of the strap assembly 20 is ignored. Of course, in other embodiments, the change of the end position of the strap assembly can also be adopted as one of the control parameters for controlling the movement of the vital sign monitor.

[0039] Please refer to Figure 2 and 3 Since the head shapes and sizes of different users are inconsistent, or the head size of the user may change at different ages when the same user uses the same head-mounted display device for a long time, these will cause the gap value between the end of the strap assembly 20 and the forehead skin to be inconsistent, so the position of the vital sign monitor 40 needs to be adjusted in time so that the vital sign monitor 40 can touch the skin and work properly.

[0040] Without loss of generality, there is a statistical regularity between the width and circumference of the human head. Through big data analysis, it can be found that the relationship between the head width and the head circumference can be expressed by the following formula (unit: mm):

[0041] ①Head width = 18.63 + 0.234 * head circumference (East Asian countries)

[0042] ②Head width = 21.54 + 0.228 * head circumference (European and American countries)

[0043] The head width (that is, the maximum width of the head) here refers to the straight-line distance between the most protruding points of the skull above the left and right auricles, and the head circumference refers to the length of the protrusion above the eyebrow arch and around the occipital tubercle. It is understandable that the statistical laws of head width and head circumference will cause some parameter changes due to factors such as different geographical locations, different races, and different living habits. However, considering that the head-mounted display device only needs to meet the usage needs of most normal people, it can be reasonably inferred that for every 1mm change in head circumference, the head width will change between 0.22mm and 0.24mm accordingly. Furthermore, the distance between the two ends of the forehead, that is, the distance between the temples on both sides, is also related to the head width, so when the head circumference changes by 1mm, the head width changes by 0.22mm to 0.24mm, and the distance between the two temples changes by 0.22mm to 0.24mm. For ease of understanding, further assume the relevant size parameters for explanation: Assume that the head circumference of the standard head model is 560mm and the head width is 149.67mm, and assume that the head circumference of the head-mounted display device in the initial state is adapted to the standard head model, that is, the head circumference of the device is 560mm. At this time, the vital sign monitor 40 just abuts against the forehead skin of the standard head model, and the corresponding position is extended by 2mm. If a user in an East Asian country has a head circumference of 550mm and a head width of 147.33mm (a difference of 2.34mm from the head width of the standard head model), the user needs to adjust the length of the strap assembly 20 by 10mm after wearing the device to reduce the head circumference of the device to a comfortable position. Since the head width of the user and the distance between the temples on both sides are smaller than the standard head model, the vital sign monitor 40 needs to extend 1.17mm to abut against the forehead skin of the user.

[0044] Accordingly, in this embodiment, the ratio of the displacement of the vital sign monitor 40 to the size variable of the device head circumference is 0.11 to 0.12, for example, 0.115, that is, for every change (lengthening or shortening) of 1 unit size of the device head circumference, the extension length of the vital sign monitor 40 will change by 0.115 unit size. Among them, there are many definitions of the length change of the device head circumference. For example, in this embodiment, the device head circumference length adapted to the standard head model is used as a reference (defined as the initial head circumference length), and the length shorter than the initial head circumference length is set as a negative value, and the length longer than the initial length is set as a positive value. Of course, in other embodiments, the factory preset head circumference size can also be used as a reference, or the user's preset head circumference size can be used as a reference; or, the length shorter than the initial head circumference length is set as a positive value, and the length longer than the initial length is set as a negative value. There are also many definitions of the displacement of the vital sign monitor, and specific reference can be made to the definition of the change of the device head circumference length. In this embodiment, the extended length of the vital sign monitor corresponds to the initial head circumference length of the device, that is, the extended length of the vital sign monitor adapted to the standard head model is used as a reference (defined as the initial extended length), and the length shorter than the initial extended length is set as a negative value, and the length longer than the initial extended length is set as a positive value.

[0045] Reference Figure 6 , Figure 6 It is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present invention. The terminal of the embodiment of the present invention is a head-mounted display device, which may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The memory 1005 may be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001, including at least one of an embedded storage device and a non-embedded storage device.

[0046] Based on the above head mounted display device, the present invention proposes a method for adjusting the position of a vital sign monitor 40, referring to Figure 5 In the first embodiment of the present invention, the position adjustment method of the vital sign monitor 40 includes:

[0047] Step S10: Acquire the size variable of the head circumference of the device, and generate the follow-up displacement according to the size variable.

[0048] Step S20: sending the following displacement to the driving member 30, so that the driving member 30 drives the vital sign monitor 40 to move a displacement value corresponding to the following displacement.

[0049] In this embodiment, the head circumference detection member is configured as a displacement sensor, which is arranged on the strap assembly and electrically connected to the driving member. The strap assembly includes at least two straps that can move closer or farther away from each other, and the displacement sensor is used to detect the displacement of the strap. The head mounted display device also includes a displacement sensor arranged on the strap assembly 20, which is electrically connected to the driving member 30 and is used to detect the displacement of the strap 21. Specifically, the displacement of the strap 21 detected by the displacement sensor reflects the head circumference size variable of the current head mounted display device. Among them, the displacement sensor can be a Hall sensor arranged on the adjustment wheel 22, and then magnets are arranged at the ends of the two straps 21. The movement of the strap 21 will drive the magnet away from or close to the Hall sensor, thereby realizing the detection of the displacement of the strap 21. At this time, the head circumference size of the device is the fixed length of the initial head circumference length plus the ranging length of the displacement sensor, wherein the ranging length has positive and negative values ​​to distinguish the increase or decrease of the head circumference size. In this way, the size variable of the head circumference of the device can be directly and accurately obtained, which has the advantages of simple structure, stable and reliable operation. Of course, in other embodiments, the displacement sensor may also be a potentiometer displacement sensor, an inductive displacement sensor, a magnetostrictive displacement sensor, or the like.

[0050] Of course, in addition to using a displacement sensor to directly obtain the displacement of the strap 21, other methods can also be used to indirectly obtain the displacement of the strap 21. Specifically, in one embodiment of the present invention, the head-mounted display device also includes an angle sensor provided on the adjustment wheel 22, and the angle sensor measures the rotation angle of the adjustment wheel 22, and calculates the size variable of the strap assembly 20 based on the relationship between the rotation angle of the adjustment wheel 22 and the size change of the strap assembly 20, that is, calculates the size variable of the device head circumference. Furthermore, in another embodiment of the present invention, in an embodiment where the adjustment wheel 22 is driven by a motor, the size variable of the strap assembly 20 can also be calculated by obtaining parameters such as the motor speed, rotation time, and rotation angle.

[0051] The technical solution of the present invention controls the displacement of the vital sign monitor 40 by changing the size of the device head circumference, so that the position of the vital sign monitor 40 relative to the user can be adjusted, and when the user adjusts the length of the device head circumference to an adapted size, the vital sign monitor 40 can fit well on the user's skin, thereby avoiding the problem of inaccurate monitoring caused by the vital sign monitor 40 not fitting the user's skin, thereby ensuring that the vital sign monitor 40 can work well and improving the monitoring accuracy of the vital sign monitor 40. In addition, by associating the displacement of the vital sign monitor 40 with the size variable of the device head circumference, it is convenient for the user to only adjust the device head circumference, and the effect of adjusting the device head circumference size and the extension length of the vital sign monitor 40 can be achieved at the same time, thereby improving the convenience of using the vital sign monitor 40 and improving the convenience of wearing the device. Specifically, when the vital sign monitor 40 is in a function-activated state, the strap assembly 20 will be loosened before the user wears the device. At this time, the extended length of the vital sign monitor 40 will be reduced, so that the head can be easily inserted into the wearing space; after the head is inserted into the wearing space, the user will tighten the strap assembly 20 until it reaches a comfortable length. At this time, the extended length of the vital sign monitor 40 will increase and just abut against the head, thereby completing the adjustment operation of the device head circumference and the vital sign monitor 40 in one step; when the user needs to remove the device, the strap assembly 20 will be loosened. At this time, the extended length of the vital sign monitor 40 will be reduced, so that the head can easily withdraw from the device.

[0052] In one embodiment, the vital sign monitor 40 includes a contact and a heart rate monitoring module provided on the contact, and the heart rate monitoring module is used to fit the skin for heart rate monitoring. Specifically, the heart rate monitoring module can be any structure such as a PPG sensor (photoelectric measurement method), at least one electrode of the electrocardiogram signal method, a bioelectric impedance sensor (bioelectric), etc., as long as it can monitor the heart rate. In this way, by adding a heart rate monitoring module to the device, the function of the device can be enriched. In particular, this function is suitable for sports and fitness monitoring, thereby enhancing the market competitiveness of the product.

[0053] In one embodiment, the vital sign monitor 40 also includes an elastic member arranged on the contact, and the heart rate monitoring module is at least partially exposed on the elastic member. It should be noted that the elastic member refers to the structure that can be elastically deformed, such as an elastic silicone pad, or a metal shrapnel, a plastic shrapnel. In this way, the elastic member can play a buffering effect to prevent the skin from being impacted by the contact and causing discomfort or even injury. In particular, since the heart rate monitoring module is attached to the temples of the facial skin, special attention should be paid to this issue. Of course, in other embodiments, the elastic member may not be provided, and the heart rate monitoring module may be directly provided on the contact.

[0054] In one embodiment, the driving member 30 includes a motor and a push rod, the push rod is drivingly connected to the motor, and the contact is provided on the push rod. In this way, the position adjustment of the vital sign monitor 40 is achieved by driving the push rod and the contact thereon by the motor, which has the advantages of simple structure, stable operation and high precision. Of course, in other embodiments, the driving member may include a cylinder and a push rod, or the driving member may include a hydraulic cylinder and a push rod.

[0055] In one embodiment, the strap 21 is provided with a mounting cavity and a evacuation hole connected to the mounting cavity, the motor is provided in the mounting cavity, and the push rod movably passes through the evacuation hole. That is, a micro electric push rod is used and provided in the strap 21, and the end of the push rod is extended and retracted after passing through the evacuation hole. In this way, most of the structure of the driving member 30 can be hidden, leaving only the necessary push rod end and the vital sign monitor 40 exposed, thereby making the device more neat and beautiful. Of course, in other embodiments, the motor can also be provided on the outside of the strap.

[0056] In the second embodiment of the present invention, based on the first embodiment of the present invention, the position adjustment method of the vital sign monitor 40 further includes:

[0057] Step S30: sending a storage signal to the driving member 30 to drive the vital sign monitor 40 to move to the storage state.

[0058] In this embodiment, the storage signal can be triggered by a device shutdown signal or by a manually operated function button. Specifically, the head-mounted display device also includes a main control board and function buttons electrically connected to the main control board. The main control board is also electrically connected to the vital sign monitor 40, the drive member 30, the displacement sensor, etc. The function buttons are exposed on the device for user operation. The start and stop of the vital sign monitor 40 and the drive member 30, the increase or decrease of the extension length of the push rod, etc. can be manually controlled through the function buttons. In this way, when the device is shut down by default and the user operates the function button as needed, the contact and the vital sign monitor 40 thereon will be stored. In this way, it can avoid the user from seeing it, and it is convenient for the user to store the entire device, and it can also prevent the drive member 30 and the vital sign monitor 40 from dust and dirt. Secondly, in the situation where the user wears the device first when the device is turned off, the stored contacts and vital sign monitor 40 can also facilitate the head to extend into the wearing space.

[0059] Specifically, in one embodiment, the strap 21 is provided with a receiving groove corresponding to the contact, the avoidance hole is connected to the receiving groove, and the contact is at least partially received in the receiving groove. In this embodiment, the contact and the vital sign monitor 40 thereon are completely received in the receiving groove. Of course, in other embodiments, the vital sign monitor may not be additionally provided with a receiving state, but may maintain its extended length adapted to the head circumference of the device for a long time.

[0060] In order to limit the effective stroke of the push rod and avoid overload of the motor, in an embodiment of the head-mounted display device, the strap 21 is provided with a limit switch corresponding to the push rod, and the limit switch is electrically connected to the motor. Specifically, the limit switch can be a touch switch, a micro switch, a distance sensor, etc. In order to reduce the manufacturing cost of the device, in this embodiment, the limit switch is configured as a micro switch. There are at least two limit switches, and at least two limit switches are respectively arranged at the front and rear ends of the motor. When the push rod is extended to the longest position, the limit switch at the front end is triggered to stop the motor, and when the push rod is extended to the shortest position, the limit switch at the rear end is triggered to stop the motor. Optionally, the limit switch can be arranged at the bottom of the receiving groove, and the outer periphery of the push rod is provided with a trigger protrusion corresponding to the limit switch, and the trigger protrusion is located on the outside of the strap 21.

[0061] For the scenario where the vital sign monitor 40 is not activated but the user has already worn the device, once the vital sign monitor 40 is activated, it will directly move to the appropriate extension length in one step according to the head circumference size of the device at that time. Specifically, in the third embodiment of the present invention, based on the first embodiment of the present invention, before the step of obtaining the size variable of the head circumference of the device, the position adjustment method of the vital sign monitor 40 further includes:

[0062] Step S40: when the vital sign monitor 40 is activated, the head circumference size of the device at that time is obtained, and an activation displacement is generated according to the head circumference size of the device.

[0063] Step S50: sending the activation displacement to the driving member 30 to drive the vital sign monitor 40 to move a displacement value corresponding to the activation displacement.

[0064] In this embodiment, when the vital sign monitor 40 is activated, it first detects the head circumference size of the device at this time, and then automatically moves to a position adapted to the head circumference size of the device. It should be noted that the activation of the vital sign monitor 40 means that the vital sign monitor 40 and the drive member 30 are activated, which can be activated through secondary control (for example, triggering the corresponding function button after the device is turned on), or it can be synchronously activated as soon as the device is turned on (that is, one-time control). In this way, once the vital sign monitor 40 is activated, it will directly move to the adapted extension length in one step according to the head circumference size of the device at this time, that is, it automatically moves and fits the skin, thereby improving the convenience of using this function. Secondly, it can achieve the effect of not being restricted to the user's usage habits and usage scenarios, that is, the user can either turn on the device first, activate the vital sign monitor 40, and then wear the device, or wear the device first, then turn on the device, and activate the vital sign monitor 40. Of course, in some embodiments, after the device is turned on, the user's operation of adjusting the device head circumference each time can be continuously recorded, that is, multiple device head circumference size variables (with positive and negative values) can be recorded, and then the sum of these size variables can be calculated to indirectly obtain the device head circumference size corresponding to when the vital sign monitor is activated. In other embodiments, the user can also manually operate the function button to increase the extension length of the push rod until the vital sign monitor fits on the skin, and then the main control board takes over the movement control of the vital sign monitor to realize the association between the displacement of the vital sign monitor and the size variable of the device head circumference, that is, to realize the automatic extension and retraction of the vital sign monitor.

[0065] Of course, in addition to the above-mentioned method of obtaining the activation displacement, the activation displacement can also be generated by obtaining the user's wearing parameters. Specifically, in the fourth embodiment of the present invention, based on the first embodiment of the present invention, before the step of obtaining the size variable of the device head circumference, the position adjustment method of the vital sign monitor 40 also includes:

[0066] Step S40': when the vital sign monitor 40 is activated, the user wearing parameters are acquired, and the activation displacement is generated according to the user wearing parameters.

[0067] Step S50 ′: sending the activation displacement to the driving member 30 to drive the vital sign monitor 40 to move a displacement value corresponding to the activation displacement.

[0068] In this embodiment, the head-mounted display device also includes a memory that is communicatively connected to the main control board, and the user wearing parameters are stored in the memory for the main control board to retrieve. It should be noted that the user wearing parameters at least include the device parameters when the user wore it last time, including the device head circumference size, the extension length of the vital sign monitor 40, etc. The memory of the same head-mounted display device can store the user wearing parameters of multiple users, and an option is provided for the user to choose which user wearing parameters to use. That is, the memory function of the device is realized, which is similar to the memory function on the electric seat of a car. It should be further explained that the storage module can be a memory provided on the device, such as a high-speed RAM memory or a disk memory, etc., or it can be a cloud storage implemented by using a cloud server, for example, the user logs in to the account and sets personalized parameters.

[0069] When the vital sign monitor 40 is activated, the main control board retrieves the user wearing parameters in the memory, and controls the vital sign monitor 40 to directly adjust the corresponding user wearing parameters, thereby improving the convenience and flexibility of the function. Among them, the user wearing parameters can be the device automatically saving and recording the user's wearing parameters during previous use, or the user can set and modify his own wearing parameters after logging in through the account. Furthermore, in the embodiment where the adjustment wheel 22 is driven by a motor, the user wearing parameters can also control the motor to drive the adjustment wheel 22 to rotate, so that the head circumference size of the device is automatically adjusted to the corresponding user's adaptation size.

[0070] In a fifth embodiment of the present invention, based on the first embodiment of the present invention, the method for adjusting the position of the vital sign monitor 40 further includes:

[0071] Step S60: When the external pressure on the vital sign monitor 40 exceeds the pressure threshold, an emergency stop signal is sent to the driving member 30 to stop the movement of the vital sign monitor 40.

[0072] In this embodiment, the vital sign monitor 40 is provided with a pressure sensor, which is electrically connected to the driving member 30 and is used to detect the external pressure on the vital sign monitor 40. Specifically, the pressure sensor can be a piezoresistive sensor or a piezoelectric sensor. The pressure sensor and the heart rate monitoring module can be distributed side by side on the contact, that is, the pressure sensor and the heart rate monitoring module are synchronously attached to the skin, or the pressure sensor can be arranged under the heart rate monitoring module, and the external pressure is transmitted to the pressure sensor via the heart rate monitoring module. It should be noted that the emergency stop signal has a higher priority than other signal instructions, including follow-up displacement, activation displacement, etc., to avoid the problem that the vital sign monitor 40 will not impact the skin and cause obvious discomfort or even injury to the user, thereby effectively ensuring the safety of the vital sign monitor 40. The pressure threshold can be directly obtained through multiple human body tests, or it can be conservatively lowered to a certain value on this basis to ensure that the vital sign monitor 40 can work normally and be comfortable enough when attached to the skin.

[0073] In one embodiment of the head-mounted display device, the head-mounted display device also includes a relay electrically connected to the pressure sensor, and the relay is also electrically connected between the drive member 30 and the displacement sensor, and the pressure sensor can control the disconnection of the relay. Specifically, when the external pressure detected by the pressure sensor exceeds the pressure threshold, the signal of the pressure sensor not only directly controls the drive member 30 to stop running, but also controls the relay to disconnect, so that the signal channel of the displacement sensor is temporarily disconnected to avoid the problem that the vital sign monitor 40 continues to extend under the control of the signal of the displacement sensor. That is, when the vital sign monitor 40 has been attached to the skin, even if the user turns the adjustment wheel 22, the drive member 30 will no longer drive the vital sign monitor 40 to continue to extend, thereby playing a double protection role.

[0074] In a sixth embodiment of the present invention, based on the first embodiment of the present invention, the step of obtaining the size variable of the head circumference of the device and generating the follow-up displacement according to the size variable includes:

[0075] Step S70: obtaining the actual displacement of the vital sign monitor 40 last time, and comparing it with the last preset displacement.

[0076] Step S81: If the actual displacement is equal to the preset displacement, the preset displacement is used as the current following displacement.

[0077] Specifically, under normal circumstances, the preset displacement amount is constant each time. For example, if the sensitivity of the head circumference size variable is set to 5mm, the preset displacement amount of the corresponding vital sign monitor 40 is 0.575mm, that is, when the user turns the adjustment wheel 22 to cause the head circumference size of the device to change by more than 5mm, the main control board will control the electric push rod to start and extend 0.575mm. However, because the device is equipped with a pressure sensor for the sake of protecting the human body, the vital sign monitor 40 should move 0.575mm, but it touches the skin halfway and triggers the pressure threshold, causing the motor to stop suddenly, so that the vital sign monitor 40 cannot complete the preset displacement amount. In this regard, it is necessary to make corrections to this. Specifically, in this embodiment, by comparing the actual displacement amount of the last movement with the preset displacement amount, it is determined whether the last movement has completed the preset displacement amount. If the actual displacement is equal to the preset displacement, the preset displacement is directly used as the follow-up displacement, that is, in this embodiment, the vital sign monitor 40 still moves at 0.575 mm; if the actual displacement is less than the preset displacement, it needs to be corrected so that the subsequent extension length of the vital sign monitor 40 is adapted to the device head circumference size (that is, the device head circumference size and the extension length of the vital sign monitor 40 both meet the wearing requirements). For example, assuming that both users A and B have standard head shapes and different head circumference sizes, the head circumference size of the head-mounted display device is adapted to the extension length of the vital sign monitor 40. In the scenario where users A and B take turns wearing the same device, when user A is using the device, the vital sign monitor 40 fits the skin before completing the preset displacement, which will result in the vital sign monitor 40 not being able to accurately return to the extension length when user A removes the device, resulting in the device head circumference size and the extension length of the vital sign monitor 40 no longer being adapted. Therefore, when user B takes over and wears the device, the problem that the physical sign monitor 40 should also be adjusted to the correct position after the head circumference size of the device is adjusted to the correct position will occur, but in fact it is not adjusted to the correct position. Of course, there are many correction methods, such as the seventh embodiment of the present invention below. It should be noted that the sensitivity of the head circumference size variable is not specifically limited. For example, in other embodiments, it can also be set to other values, such as 1mm, 3mm, 8mm, 10mm, etc.

[0078] In a seventh embodiment of the present invention, based on the sixth embodiment of the present invention, after the step of obtaining the actual displacement of the last movement of the vital sign monitor 40 and comparing it with the last preset displacement, the position adjustment method of the vital sign monitor 40 further includes:

[0079] Step S82: If the actual displacement is less than the preset displacement, record the actual displacement.

[0080] Step S90: taking the actual displacement as the current following displacement.

[0081] Specifically, before this movement, the difference between the actual displacement and the preset displacement during the last movement is eliminated to achieve the effect of correcting the position of the vital sign monitor 40, so that the extended length of the vital sign monitor 40 during this movement and thereafter is adapted to the device head circumference size, thereby improving the accuracy of the use of the vital sign monitor 40. For example, the last preset displacement is 0.575mm, and the actual displacement is 0.3mm, then the follow-up displacement this time should be 0.3mm. Of course, in other embodiments, it is also possible to first execute the preset displacement, pause for a certain period of time and then correct the deviation value, or correct the deviation value during the next movement. Of course, it is also possible to shut down and restart to re-adapt the extended length of the vital sign monitor to the device head circumference size. Alternatively, the extended length of the vital sign monitor can be manually increased or decreased through the function button to manually correct the difference between the actual displacement and the preset displacement, so that the vital sign monitor is adjusted in place and fits on the skin.

[0082] The present invention also provides a head mounted display device, comprising a processor and a memory electrically connected to the processor, wherein the memory stores a vital sign monitor position adjustment program that can be run on the processor, and the vital sign monitor position adjustment program implements each step of the aforementioned vital sign monitor position adjustment method when executed by the processor. The specific steps of the vital sign monitor position adjustment method refer to the above embodiment, and since the head mounted display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0083] The present invention also provides a storage medium, wherein the storage medium stores a vital sign monitor position adjustment program, and when the vital sign monitor position adjustment program is executed by a processor, each step of the aforementioned vital sign monitor position adjustment method is implemented. The specific steps of the vital sign monitor position adjustment method refer to the above embodiment. Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0084] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for adjusting the position of a vital sign monitor, used for a head mounted display device, wherein the head mounted display device comprises a device body, a strap assembly and a vital sign monitor, characterized in that: The strap assembly is connected to both ends of the device body, and together with the device body, defines a wearing space for the user's head to wear. The vital sign monitor is arranged at one end of the strap assembly close to the device body, and can be displaced relative to the strap assembly along the head width direction to fit against the head. The method for adjusting the position of the vital sign monitor includes: Obtaining a size variable of the head circumference of the device, and generating a follow-up displacement according to the size variable; wherein the ratio of the follow-up displacement to the size variable ranges from 0.11 to 0.12; The following displacement is sent to a driving member, so that the driving member drives the vital sign monitor to move a displacement value corresponding to the following displacement, and makes the vital sign monitor approach or move away from the head along the head width direction.

2. The method for adjusting the position of a vital sign monitor according to claim 1, characterized in that: Before the step of obtaining the size variable of the device head circumference, the method for adjusting the position of the vital sign monitor further includes: When the vital sign monitor is activated, obtaining the head circumference size of the device at that time, and generating an activation displacement according to the head circumference size of the device; The activation displacement is sent to the driving member to drive the vital sign monitor to move a displacement value corresponding to the activation displacement.

3. The method for adjusting the position of a vital sign monitor according to claim 1, characterized in that: Before the step of obtaining the size variable of the device head circumference, the method for adjusting the position of the vital sign monitor further includes: When the vital sign monitor is activated, obtaining user wearing parameters, and generating an activation displacement according to the user wearing parameters; The activation displacement is sent to the driving member to drive the vital sign monitor to move a displacement value corresponding to the activation displacement.

4. The method for adjusting the position of a vital sign monitor according to claim 1, wherein: The step of obtaining the size variable of the device head circumference and generating the follow-up displacement according to the size variable comprises: Obtaining the actual displacement of the last movement of the vital sign monitor, and comparing it with the last preset displacement; If the actual displacement is equal to the preset displacement, the preset displacement is used as the following displacement.

5. The method for adjusting the position of a vital sign monitor according to claim 4, characterized in that: After the step of obtaining the actual displacement of the last movement of the vital sign monitor and comparing it with the last preset displacement, the method for adjusting the position of the vital sign monitor further includes: If the actual displacement is less than the preset displacement, recording the actual displacement; The actual displacement is used as the current following displacement.

6. The method for adjusting the position of a vital sign monitor according to claim 1, characterized in that: The method for adjusting the position of the vital sign monitor further comprises: When the external pressure on the vital sign monitor exceeds a pressure threshold, an emergency stop signal is sent to the driving member to stop the movement of the vital sign monitor.

7. The method for adjusting the position of a vital sign monitor according to claim 1, characterized in that: The method for adjusting the position of the vital sign monitor further comprises: A storage signal is sent to the driving member to drive the vital sign monitor to move to a storage state.

8. A head mounted display device, characterized in that: It includes a processor and a memory electrically connected to the processor, the memory stores a vital sign monitor position adjustment program that can be run on the processor, and when the vital sign monitor position adjustment program is executed by the processor, it implements the various steps of the vital sign monitor position adjustment method as described in any one of claims 1 to 7.

9. A storage medium, characterized in that: The storage medium stores a vital sign monitor position adjustment program, and when the vital sign monitor position adjustment program is executed by the processor, each step of the vital sign monitor position adjustment method according to any one of claims 1 to 7 is implemented.

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