CN211348857U - Wearable device - Google Patents
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- CN211348857U CN211348857U CN201921647770.XU CN201921647770U CN211348857U CN 211348857 U CN211348857 U CN 211348857U CN 201921647770 U CN201921647770 U CN 201921647770U CN 211348857 U CN211348857 U CN 211348857U
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Abstract
The application discloses wearable equipment relates to the wearable equipment field, and the main objective makes wearable equipment and human laminating, reduces the emergence of light leak phenomenon. The main technical scheme of the application is as follows: a wearable device comprising: the body is provided with an optical device and is used for converting emergent light of the display device to form image information perceived by a wearer; the wearing body is connected with the body and used for forming an accommodating space which can keep the relative stable relation between the wearable device and the head of a wearer; wherein the wearing body comprises an adjustment device that is switchable between a first volume and a second volume such that the size of the receiving space is different. Thereby make accommodation space's size can adjust according to different head types or face type for wearable equipment and head laminating reduce the emergence of light leak phenomenon.
Description
Technical Field
The application relates to the field of wearable equipment, in particular to wearable equipment.
Background
Present wearing formula equipment is difficult to be fit for various types of face and head form or face form at present, and when wearing formula equipment and head form or face form mismatch, can cause and wear uncomfortable, even the phenomenon of emergence light leak.
The existing solutions generally adjust the size of the accommodating space in the wearable device through tightness, for example, the size of the accommodating space in the wearable device is adjusted by the overlapping range of the knob driving the binding band, or the size of the accommodating space in the wearable device is adjusted by the stretching degree of the elastic binding band. However, in this way, the head of the user cannot be completely attached to the wearable device, which causes light leakage.
Therefore, how to fit the wearable device to the head and reduce the light leakage phenomenon becomes a problem to be solved.
Content of application
In view of this, embodiments of the present application provide a wearable device, which mainly aims to attach a wearable device to a human body and reduce light leakage.
In order to achieve the above purpose, the present application mainly provides the following technical solutions:
in one aspect, an embodiment of the present application provides a wearable device, including:
the body is provided with an optical device and is used for converting emergent light of the display device to form image information perceived by a wearer;
the wearing body is connected with the body and used for forming an accommodating space which can keep the relative stable relation between the wearable device and the head of a wearer;
wherein the wearing body comprises an adjustment device that is switchable between a first volume and a second volume such that the size of the receiving space is different.
In this technical scheme, the wearing body still includes:
a wearable device, the adjustment device being at least partially disposed inside the wearable device.
In this technical solution, the adjusting device includes:
the filling module is used for filling media into the first cavity, so that the volume of the first cavity is changed.
In this technical solution, the adjusting device further includes: and the second cavity for accommodating the medium is positioned outside the accommodating space and is communicated with the first cavity.
In this technical solution, the first cavity has a first opening, and the first opening is used for obtaining a medium from outside the wearable device and filling the medium into the first cavity; the first cavity has a second opening for discharging media out of the wearable device; wherein the first opening and the second opening are the same or different.
In this technical scheme, the filling module is an air pump, the medium is air, and the air pump is connected with the first cavity and is used for inflating the first cavity.
In the technical scheme, the method further comprises the following steps:
the detection device is arranged on the wearing body and used for detecting whether the accommodating space meets the parameters of the wearing conditions or not;
and the processing device is connected with the detection device, connected with the adjusting device and used for controlling the adjusting device according to the parameters.
In the technical scheme, the detection device is used for detecting that the pressure value of the first cavity is applied to all or part of the part, in contact with the first cavity, of the head, and sending the pressure value to the processing device, and the processing device is connected with the filling module;
if the pressure value is larger than a preset value, the processing device controls the filling module to discharge the medium from the first cavity;
if the pressure value is smaller than the preset value, the processing device controls the filling module to enable the first cavity to be filled with the medium.
In this technical solution, the adjusting device further includes:
the switch assembly is arranged on the outer surface of the wearable equipment, connected with the filling module and used for controlling the opening and closing of the filling module.
In the technical scheme, the adjusting device is positioned on one side of the body and/or the side opposite to the body;
the detection device is arranged on the inner side of the wearing body and is positioned in the middle and/or edge position of the adjusting device.
The wearable device provided by the embodiment of the application comprises a body and a wearable body, wherein the body is provided with an optical device for converting emergent light of a display device to form image information perceived by a wearer, the wearable body is connected with the body to form an accommodating space, the wearable device comprises an adjusting device, the adjusting device can be switched between a first volume and a second volume, so that the accommodating space is different in size, the accommodating space can keep the row-to-row stable relation between the wearable device and the head of the wearer according to different face shapes and head shapes, and compared with the prior art, the method for adjusting the accommodating space through tightness adjustment is adopted, the wearable device is provided with the adjusting device capable of adjusting the volume, so that the size of the accommodating space can be adjusted according to different head shapes or face shapes, and the wearable device is attached to the head, the occurrence of the light leakage phenomenon is reduced, and the comfort of the wearer can be improved.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
Fig. 1 is a schematic structural diagram of a wearable device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural view of a wearing body according to an embodiment of the present disclosure;
the reference numerals are as follows:
Detailed Description
To further explain the technical means and effects of the present application for achieving the intended application, the following detailed description is given for the wearable device according to the present application with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1, an embodiment of the present application provides a wearable device 1, including:
a body 12 having an optical device for converting the emergent light of the display device to form image information perceived by the wearer;
a wearing body 14 connected with the body 12 for forming a receiving space 142, the receiving space 142 being capable of maintaining a relatively stable relationship between the wearable device 1 and a wearer's head;
wherein the wearing body 14 comprises an adjustment device 144, the adjustment device 144 being switchable between a first volume and a second volume such that the size of the receiving space 142 is different.
The wearable device 1 provided by the embodiment of the application comprises a body 12 and a wearable body 14, wherein the body 12 is provided with an optical device for converting emergent light of a display device to form image information perceived by a wearer, the wearable body 14 is connected with the body 12, the wearable body is a structure capable of fixing the body on the head of the wearer, generally an eye-shade-shaped or helmet-shaped structure, and is used for forming an accommodating space 142 for accommodating the head of the wearer, the wearable device comprises an adjusting device 144, the adjusting device 144 can be switched between a first volume and a second volume, the first volume and the second volume are arbitrary volumes, so that the size of the accommodating space 142 is different, the accommodating space 142 can keep the row-to-row stable relation between the wearable device 1 and the head of the wearer according to different face types and head types, and compared with the prior art, the method for adjusting the accommodating space 142 through elastic adjustment is realized, the application provides an adjusting device 144 that can adjust the volume has in wearable equipment 1 to make accommodation space 142's size can adjust according to different head types or face types, make wearable equipment 1 and head laminating, reduce the emergence of light leak phenomenon, and through adjusting device to the automatically regulated of accommodation space size, thereby make things convenient for the wearing of wearer.
Optionally, the body comprises an optical device and a display device, the display device is integrated in the body, and the optical device is used for converting emergent light rays of the display device to form image information perceived by the wearer; optionally, the body includes an optical device, but does not include a display device, and when the wearable device is used, the display device may be fixed at a designated position on the wearable device 1, and the optical device is used to convert the emergent light of the display device to form image information perceived by the wearer, where the display device may be a mobile phone, and the mobile phone is fixed at the designated position on the wearable device 1, so that the optical device is used to convert the emergent light of the mobile phone to form image information perceived by the wearer.
In the embodiment of the present application, the wearable body 14 further includes:
a wearing device, said adjustment device 144 being at least partially arranged inside said wearing device.
In this embodiment, the wearing body 14 comprises wearing means for enclosing other devices within the wearing body 14, and the adjustment means 144 is at least partially arranged inside the wearing means, such that the adjustment means 144 is switchable between a first volume and a second volume, such that the size of the receiving space 142 within the wearing body 14 can be varied.
In the embodiment of the present application, the adjusting device 144 includes: a first cavity forming the receiving space 142 and a filling module for filling the first cavity with a medium such that the volume of the first cavity changes.
In this embodiment, the adjusting device 144 includes a first cavity and a filling module, the first cavity may be a part of the wearing device and is used for covering other devices in the wearing body 14, so as to save materials, the filling module is used for filling a medium into the first cavity, so as to change the volume of the first cavity, the size of the first cavity is large, the space of the accommodating space 142 becomes small, the size of the first cavity is small, the space of the accommodating space 142 becomes large, that is, the size of the accommodating space 142 is changed by filling the medium into the first cavity through the filling module, so as to adjust the size of the accommodating space 142 by adjusting the volume of the first cavity, so that the accommodating space 142 can be adjusted according to different head types or face types, so that the wearable device 1 fits the head, and the occurrence of the light leakage phenomenon is reduced.
In an embodiment of the present application, the adjusting device further includes:
and the second cavity for accommodating the medium is positioned outside the accommodating space and is communicated with the first cavity.
In this embodiment, the adjusting device further includes a second cavity, the second cavity is communicated with the first cavity and located outside the accommodating space, the first cavity of the adjusting device is located inside the wearing device, the second cavity is located outside the wearing device, and the total volume of the media in the first cavity and the second cavity is constant, so that when the filling module fills the media into the first cavity, the media can be filled into the first cavity through the second cavity, when the media in the first cavity is excessive, the media in the first cavity can be transmitted into the second cavity, so as to change the volume of the first cavity, and further change the size of the accommodating space, the total volume of the first cavity and the accommodating space is constant, the volume change of the first cavity inevitably causes the volume change of the accommodating space, when the volume of the first cavity becomes larger, the volume of the accommodating space becomes smaller, and when the volume of the first cavity becomes smaller, accommodation space's volume grow to the volume that realizes changing first cavity through changing the second cavity makes accommodation space's volume realize adjusting, thereby makes accommodation space can adapt to different head types or face type, thereby wearing formula equipment and head laminating reduce the emergence of light leak phenomenon.
In an embodiment of the present application, the first cavity has a first opening, and the first opening is used for obtaining a medium from outside the wearable device and filling the medium into the first cavity; the first cavity has a second opening for discharging media out of the wearable device; wherein the first opening and the second opening are the same or different.
In this embodiment, the first cavity includes a first opening for obtaining a medium from outside the wearable device 1 and filling the medium into the first cavity, the wearable device 1 is filled with water or air from outside to the first cavity, the volume of the first cavity is changed by filling the water or air, the first cavity includes a second opening for discharging the water or air in the first cavity, the second opening and the first opening may be the same opening, and if the second opening and the first opening are the same opening, the second opening is used for discharging the water or air in the first cavity to outside the wearable device 1.
In this embodiment, when the adjusting device further includes a second cavity, the first cavity is connected to the second cavity through the first opening, the medium is filled into the first cavity through the second cavity, the first cavity is further connected to the second cavity through the second opening, and the medium in the first cavity is discharged into the second cavity through the second opening, so as to facilitate recycling of the medium; in addition, the second opening and the first opening may not be one opening.
In this application embodiment, first cavity includes first opening, and first cavity is connected with the filling module through first opening, and the filling module is used for obtaining the medium and filling to first cavity from wearable device 1 outward, and the volume that makes first cavity through the medium that obtains from the external world changes, and first cavity includes the second opening, and the second opening is used for water or gaseous exhaust in the first cavity, and the second opening is the bleed valve, and the second opening is used for discharging the medium in the first cavity outside wearable device 1.
The medium may be other flowable media such as liquid or gas.
In this application embodiment, the filling module is an air pump, the medium is air, and the air pump is connected with the first cavity and is used for inflating the first cavity.
In this embodiment, when the medium is a gas, the filling module is a gas pump, and the gas pump is connected to the first cavity, so that the gas is filled into the first cavity through the gas pump. The air pump links to each other with first cavity through first opening, aerifys or stops to aerify in the first cavity to change the volume of first cavity, and then change accommodation space 142's volume, make accommodation space 142 can adjust according to different head types or face types, make wearable equipment 1 and head laminating, reduce the emergence of light leak phenomenon.
In addition, for the miniaturization of the device, the air pump is a micro air pump.
Optionally, when the medium is a liquid, the filling module is a water filling machine.
In the embodiment of the present application, the method further includes:
a detecting device, disposed on the wearing body 14, for detecting whether the standard accommodating space 142 meets the parameters of the wearing condition;
and a processing device, connected to the detecting device and the adjusting device 144, for controlling the adjusting device 144 according to the parameter.
In this embodiment, the wearable device 1 further includes a detecting device and a processing device, the detecting device is disposed on the wearable body 14 and is configured to detect whether the accommodating space 142 satisfies the parameters of the wearing condition, that is, detect whether the accommodating space 142 matches the head shape or the face shape, when the wearable device is worn and turned on by the wearer, the detecting device is automatically triggered to detect whether the accommodating space 142 satisfies the parameters of the wearing condition, if the wearing condition is satisfied, the processing device controls the adjusting device to stop adjusting the size of the accommodating space, at this time, the size of the accommodating space 142 matches the size of the wearer, if the accommodating space 142 does not satisfy the parameters of the wearing condition, the processing device controls the adjusting device to compare the detected parameters with the preset parameters, and controls the adjusting device to adjust the size of the accommodating space according to the comparison result until the size of the accommodating space 142 matches the head of the wearer, thereby this application can confirm whether accommodation space 142 matches with head form or face form through the pressure size that detects detection device and receive, detect pressure and reach the default when detection device, then accommodation space 142 matches with head form or face form this moment, detection device sends the signal to processing apparatus, processing apparatus stops to pack the medium in the first cavity according to received signal control adjusting device 144, thereby make accommodation space 142's size can adjust according to different head forms or face forms, make wearable equipment 1 and head laminating, reduce the emergence of light leak phenomenon.
In the embodiment of the application, the detection device is used for detecting that the pressure value of the first cavity is applied to all or part of the part, in contact with the first cavity, of the head, and sending the pressure value to the processing device, and the processing device is connected with the filling module;
if the pressure value is larger than a preset value, the processing device controls the filling module to discharge the medium from the first cavity;
if the pressure value is smaller than the preset value, the processing device controls the filling module to enable the first cavity to be filled with the medium.
In this embodiment, the detecting device is configured to detect that all or a part of the portion of the head, which is in contact with the first cavity, is subjected to a pressure value of the first cavity, and transmit the pressure value to the processing device, if the pressure value is greater than a preset value, the detecting device feeds back the pressure value to the processing device, the processing device determines according to the received pressure value, if the pressure value is greater than the preset value, the processing device controls the filling module to discharge a medium from the first cavity, and if the pressure value is less than the preset value, the processing device controls the filling module to fill the medium into the first cavity, so that the size of the accommodating space 142 is changed by changing the volume of the first cavity, so that the wearable device 1 and the head of the wearer maintain a relatively stable relationship, and light leakage is prevented.
As shown in fig. 1, in this embodiment, the adjusting device 144 further includes: the switch assembly 146 is arranged on the outer surface of the wearable device 1, connected with the filling module and used for controlling the opening and closing of the filling module.
In the embodiment of the present application, the medium is a gas, and the adjusting device 144 includes: the switch assembly 146, the filling module and the first cavity, the switch assembly 146 is arranged on the outer surface of the wearable device 1, the filling module is an air pump, the air pump comprises a driving motor, the switch assembly 146 is connected with the driving motor of the air pump, the switch assembly 146 controls the on-off of the driving motor, the air pump is connected with the first cavity through a first opening so as to inflate or stop inflating the first cavity under the control of the switch assembly to change the volume of the first cavity, meanwhile, after the volume of the first cavity changes, the detection device is automatically triggered, the detection device detects whether the accommodating space 142 meets the parameters of wearing conditions in real time, if not, the driving motor is controlled through the processing device according to the parameters so that the air pump inflates or stops inflating according to the parameters, the switch assembly 146 is also connected with a second opening of the first cavity so as to control the opening and closing of the second opening, the second opening is a gas release valve to release gas or stop releasing gas. Thereby, the size of the accommodating space 142 is changed, so that the wearable device 1 and the head of the wearer keep a relatively stable relationship, and light leakage is prevented. The switch assembly 146 may be directly controlled to close when the user wishes to stop inflation or deflation during automatic adjustment by the wearable device 1. And when the medium is gas, the wearing body 14 has light weight, strong plasticity and wider applicability.
In the embodiment of the present application, the adjusting device 144 includes: the switch assembly 146 is arranged on the outer surface of the wearable device 1, the first cavity is connected with the second cavity through the first opening and/or the second opening, the switch assembly 146 is connected with the first opening and/or the second opening, the switch assembly 146 controls the volume in the first cavity and the second cavity by controlling the opening and closing of the first opening and/or the second opening, meanwhile, after the volume of the first cavity changes, the detection device is automatically triggered, the detection device detects whether the accommodating space 142 meets the parameters of wearing conditions in real time, if not, the first opening or the second opening is controlled to be opened or closed through the processing device according to the parameters, so that the gas in the second cavity is transmitted into the first cavity, or the gas in the first cavity is transmitted into the second cavity, and the size of the accommodating space 142 is changed, so that the wearable device 1 maintains a relatively stable relationship with the head of the wearer, preventing light leakage.
In this embodiment, the detecting device is a pressure sensor, the pressure sensor is used for detecting that the pressure value of the first cavity is applied to all or part of the head, which is in contact with the first cavity, the processing device is a control chip, the pressure sensor is connected with the control chip, the control chip is used for receiving the pressure value sensed by the pressure sensor and comparing the pressure value with a preset value of the control chip, the control chip is connected with a driving motor of the air pump and a second opening of the first cavity and is used for controlling the driving motor according to the pressure value sensed by the pressure sensor so as to control the air pump to inflate or stop inflating the first cavity, and is also used for controlling the opening and closing of the second opening according to the pressure value sensed by the pressure sensor so as to discharge or stop discharging the gas in the first cavity. When the preset value is higher than the pressure value detected by the pressure sensor, the control chip controls the driving motor to be closed, controls the second opening to be opened, deflates the first cavity through the second opening, and stops deflating when the pressure value detected by the pressure sensor is equal to the preset value; when the preset value is lower than the pressure value detected by the pressure sensor, the control chip controls the driving motor to be started so as to control the air pump to inflate or stop inflating the first cavity, and when the pressure value detected by the pressure sensor is equal to the preset value, the inflation is stopped. Thereby make accommodation space 142's size can adjust according to different head types or face type for wearable device 1 and head laminating reduce the emergence of light leak phenomenon.
Preferably, the switch assembly 146, the control chip and the air pump are disposed outside the wearable body, and the second opening of the first cavity is also located outside the wearable body.
In this embodiment, the wearable device further comprises an exhaust valve connected to the second cavity for exhausting gas in the second cavity when the wearable device 1 is not in use, so as to reduce the volume of the wearable device 1, thereby saving space.
In the embodiment of the present application, the adjusting device 144 is located on one side of the body 12 and/or on the side opposite to the body 12;
the detecting device is disposed inside the wearing body 14 and located in the middle and/or at the edge of the adjusting device 144.
As shown in fig. 1 and 2, in this embodiment, the adjustment means 144 is located on one side of the body 12 and/or on the opposite side of the body 12, and preferably the detection means is located on the inner side of the wearer and in a position corresponding to the cheekbones and/or temples of the wearer's head; that is, the adjusting device 144 includes a face adjusting device 144 and a head adjusting device 144, the eye adjusting device 144 is mainly adapted to adjust the position relationship between the face and the wearable device 1, so that the face and the wearable device maintain a relatively stable relationship, so that the wearable device fits the face better, the head adjusting device 144 is generally disposed at the back of the head, and is mainly adapted to adjust the position relationship between the back of the head and the wearable device 1, so that the back of the head and the wearable device maintain a relatively stable relationship, so that the wearable device fits the head better, so that the wearable device 1 fits the head, and the occurrence of the light leakage phenomenon is reduced. The detecting means is disposed inside the wearing body 14 at the middle and/or edge position of the adjusting means 144 for detecting whether the accommodating space 142 filled with the medium matches the head shape or the face shape. Alternatively, a plurality of detection devices may be provided, and the detection devices are respectively located at the middle and the edge positions of the two sides of the adjusting device 144, so that whether the accommodating space 142 filled with the medium is matched with the head shape or the face shape can be detected from a plurality of positions, and the light leakage phenomenon can be better prevented.
In this embodiment, the edge of the wearing body 14 is partially or entirely provided with an elastic material to make the wearing more comfortable for the user.
The wearable device provided by the embodiment of the application comprises a body and a wearable body, wherein the body is provided with an optical device for converting emergent light of a display device to form image information perceived by a wearer, the wearable body is connected with the body to form an accommodating space, the wearable device comprises an adjusting device, the adjusting device can be switched between a first volume and a second volume, so that the accommodating space is different in size, the accommodating space can keep the row-to-row stable relation between the wearable device and the head of the wearer according to different face shapes and head shapes, and compared with the prior art, the method for adjusting the accommodating space through tightness adjustment is adopted, the wearable device is provided with the adjusting device capable of adjusting the volume, so that the size of the accommodating space can be adjusted according to different head shapes or face shapes, and the wearable device is attached to the head, the occurrence of light leakage phenomenon is reduced.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A wearable device, characterized by, includes:
the body is provided with an optical device and is used for converting emergent light of the display device to form image information perceived by a wearer;
the wearing body is connected with the body and used for forming an accommodating space which can keep the relative stable relation between the wearable device and the head of a wearer;
wherein the wearing body comprises an adjustment device that is switchable between a first volume and a second volume such that the size of the receiving space is different.
2. The wearable device of claim 1, the wearable body further comprising: a wearable device, the adjustment device being at least partially disposed inside the wearable device.
3. The wearable device of claim 1, the adjustment means comprising:
the filling module is used for filling media into the first cavity, so that the volume of the first cavity is changed.
4. The wearable device of claim 1, the adjustment means further comprising:
and the second cavity for accommodating the medium is positioned outside the accommodating space and is communicated with the first cavity.
5. The wearable device of claim 3,
the first cavity is provided with a first opening, and the first opening is used for obtaining media from the outside of the wearable device and filling the media into the first cavity; the first cavity has a second opening for discharging media out of the wearable device;
wherein the first opening and the second opening are the same or different.
6. The wearable device of claim 3, wherein the filling module is an air pump, the medium is air, and the air pump is connected to the first cavity and used for inflating the first cavity.
7. The wearable device of any of claims 3-6, further comprising:
the detection device is arranged on the wearing body and used for detecting whether the accommodating space meets the parameters of the wearing conditions or not;
and the processing device is connected with the detection device, connected with the adjusting device and used for controlling the adjusting device according to the parameters.
8. The wearable device of claim 7,
the detection device is used for detecting the pressure value of the first cavity on all or part of the part, in contact with the first cavity, of the head and sending the pressure value to the processing device, and the processing device is connected with the filling module;
if the pressure value is larger than a preset value, the processing device controls the filling module to discharge the medium from the first cavity;
if the pressure value is smaller than the preset value, the processing device controls the filling module to enable the first cavity to be filled with the medium.
9. The wearable device of claim 7, the adjustment means further comprising:
the switch assembly is arranged on the outer surface of the wearable equipment, connected with the filling module and used for controlling the opening and closing of the filling module.
10. The wearable device of claim 7,
the adjusting device is positioned on one side of the body and/or the side opposite to the body;
the detection device is arranged on the inner side of the wearing body and is positioned in the middle and/or edge position of the adjusting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647770.XU CN211348857U (en) | 2019-09-30 | 2019-09-30 | Wearable device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921647770.XU CN211348857U (en) | 2019-09-30 | 2019-09-30 | Wearable device |
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| CN211348857U true CN211348857U (en) | 2020-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112190227A (en) * | 2020-10-14 | 2021-01-08 | 上海鹰瞳医疗科技有限公司 | Fundus camera and method for detecting use state thereof |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112190227A (en) * | 2020-10-14 | 2021-01-08 | 上海鹰瞳医疗科技有限公司 | Fundus camera and method for detecting use state thereof |
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