TWI810129B - Head mounted display device and strap module thereof - Google Patents

Abstract

A head mounted display device and a strap module thereof are provided. The strap module includes a casing, two straps, two elastic elements, a coupling element and a braking element. The ends of the two straps are respectively connected to opposite sides of a host. The two straps are at least partially overlapped and accommodated in the casing. Two ends of the first elastic element are respectively connected to the casing and the first strap. Two ends of the second elastic element are respectively connected to the casing and the second strap. The elastic recovery force of the two elastic elements is used to drive the two straps to move relative to the casing to increase the overlapping degree of the two straps. The coupling element is rotatably disposed at the casing and simultaneously couples the two straps. The braking element is movably disposed at the casing. When the braking element is in a brake position, the coupling element is braked to fix the overlapping degree of the two straps. The braking element is separated from the coupling element when it is in a movable position.

Description

Head-mounted display device and its headband module

The present invention relates to a display device and its belt module, and in particular to a head-mounted display device and its headband module.

As the technology industry develops day by day, the types, functions and ways of use of display devices are becoming more and more diverse, and head-mounted display devices that can be directly worn on the head of users have also emerged accordingly. After the user wears the head-mounted display device, in addition to seeing a three-dimensional image, the image will also change with the rotation of the user's head, which can provide the user with a more immersive experience.

However, different users have different head circumferences, and a headband module that can be adjusted in length is required to be suitable for different users. At present, the length of the headband module is generally adjusted through the knob to adjust the degree of tightness. Users spend more time turning the knob to loosen the headband module and put it on, and spend time turning the knob again to shorten the length and adjust the tightness of the headband module. At the same time, it takes a lot of time to turn the knob to loosen the headband module to take off the head-mounted display device.

The invention provides a head-mounted display device and a headband module thereof, which can improve the problem of time-consuming wearing.

The head-mounted display device of the present invention includes a host and a headband module. The headband module includes a housing, a first belt body, a second belt body, a first elastic member, a second elastic member, a coupling member, a braking member, a shape memory alloy member and a reset pieces. The first belt has a first end and a first adjusting section. The second belt body has a second end and a second adjusting section. The first end and the second end are respectively connected to opposite sides of the host. The first adjustment section and the second adjustment section are at least partially overlapped and accommodated in the casing. Two ends of the first elastic member are respectively connected to the casing and the first adjusting section. Both ends of the second elastic member are respectively connected to the casing and the second adjustment section. The elastic restoring force of the first elastic member and the second elastic member is used to drive the first adjustment section and the second adjustment section to move relative to the casing to increase the overlapping degree of each other. The coupling member is rotatably disposed on the casing, and simultaneously couples the first adjusting section and the second adjusting section. The braking member is movably arranged on the casing. When the brake part is in a brake position, the coupling part is braked to fix the overlapping degree of the first adjustment section and the second adjustment section. The brake part is separated from the coupling part when it is in a movable position. The shape memory alloy part is connected between the casing and the braking part. The reset part is connected between the casing and the brake part. The shape-memory alloy part is used for electric heating and contraction to drive the brake part to move from the braking position to the movable position. The reset part is used for keeping the braking part at the braking position when the shape memory alloy part is in a power-off state.

The headband module of the present invention includes a housing, a first belt body, a second belt body, a first elastic member, a second elastic member, a coupling member, a braking member, and a shape memory alloy member with a reset piece. The first belt has a first end and a first adjusting section. The second belt body has a second end and a second adjusting section. The first end and the second end are respectively connected to opposite sides of a host. The first adjustment section and the second adjustment section are at least partially overlapped and accommodated in the casing. Two ends of the first elastic member are respectively connected to the casing and the first adjusting section. Both ends of the second elastic member are respectively connected to the casing and the second adjustment section. The elastic restoring force of the first elastic member and the second elastic member is used to drive the first adjustment section and the second adjustment section to move relative to the casing to increase the overlapping degree of each other. The coupling member is rotatably disposed on the casing, and simultaneously couples the first adjusting section and the second adjusting section. The braking member is movably arranged on the casing. When the brake part is in a brake position, the coupling part is braked to fix the overlapping degree of the first adjustment section and the second adjustment section. The brake part is separated from the coupling part when it is in a movable position. The shape memory alloy part is connected between the casing and the braking part. The reset part is connected between the casing and the brake part. The shape-memory alloy part is used for electric heating and contraction to drive the brake part to move from the braking position to the movable position. The reset part is used for keeping the braking part at the braking position when the shape memory alloy part is in a power-off state.

In an embodiment of the present invention, the headband module further includes a positioning member disposed on the casing and having a positioning slot. The brake piece has a bump. When the braking member is at the braking position, the protrusion is located at a first end of the positioning groove. When the brake part is in the movable position, the protrusion is located at a second end of the positioning groove.

In an embodiment of the present invention, a neck portion of the positioning groove is located between the first end and the second end. The width of the neck is slightly smaller than the width of the lug.

In an embodiment of the present invention, the reset member is made of shape memory alloy.

In an embodiment of the present invention, the headband module further includes a switch disposed on the housing for turning on or off the shape memory alloy element.

In an embodiment of the invention, the switch is a mechanical switch or a touch switch.

In an embodiment of the present invention, the material of the first elastic member is shape memory alloy.

In an embodiment of the invention, the material of the second elastic member is shape memory alloy.

In one embodiment of the invention, the coupling member is a gear.

Based on the above, in the head-mounted display device and its headband module of the present invention, the head-mounted display device can be directly stretched and worn, and the head-mounted display device can be automatically tightened on the head by the elastic member, easily And fast.

FIG. 1 is a schematic diagram of a head-mounted display device according to an embodiment of the invention. FIG. 2 is a schematic diagram of a disassembled headband module of the head-mounted display device in FIG. 1 . Please refer to FIG. 1 , the head-mounted display device 50 of this embodiment includes a host 52 and a headband module 100 .

In this embodiment, the host 52 is a head-mounted display, which can be applied to, for example, a virtual reality system (virtual reality system), an augmented reality system (augmented reality system) or a mixed reality system (mixed reality system), etc. field. The host 52 may include components such as an optical system and a protective casing, and may be provided with a display or be suitable for placing a display. The aforementioned display may be a built-in display or an external portable display (such as a smart phone, etc.), but the present invention is not limited thereto. The optical system includes optical elements for changing the optical path of the display, such as lenses, light guides, or lenses.

Please refer to FIG. 1 and FIG. 2 , the headband module 100 of this embodiment includes a housing 110 , a first belt body 122 , a second belt body 124 , a first elastic member 132 , and a second elastic member 134 , a coupling piece 140 and a brake piece 150 . The first belt 122 has a first end 122A and a first adjusting section 122B. The second belt 124 has a second end 124A and a second adjusting section 124B. The first end 122A and the second end 124A are respectively connected to opposite sides of the host 52 . In this embodiment, the first end 122A and the second end 124A are fixedly connected to the host 52 , but the first end 122A and the second end 124A may also be detachably connected to the host 52 . The first adjusting section 122B and the second adjusting section 124B are at least partially overlapped and accommodated in the casing 110 .

Two ends of the first elastic member 132 are respectively connected to the housing 110 and the first adjusting section 122B. Two ends of the second elastic member 134 are respectively connected to the housing 110 and the second adjusting section 124B. The elastic restoring force of the first elastic member 132 and the second elastic member 134 is used to drive the first adjusting section 122B and the second adjusting section 124B to move relative to the housing 110 to increase the degree of mutual overlap. Therefore, when the user applies force to the main body 52 and the casing 110 to pull them apart so as to wear the head-mounted display device 50 on the head, the first elastic member 132 and the second elastic member 134 will be pulled by force. stretch. When the head-mounted display device 50 is worn on the head, the user no longer exerts force, the elastic recovery force of the first elastic member 132 will drive the first adjustment section 122B to move relative to the housing 110, and the elastic recovery of the second elastic member 134 The force will also drive the second adjustment section 124B to move relative to the housing 110 , thereby increasing the degree of overlap between the first adjustment section 122B and the second adjustment section 124B. In this way, the head-mounted display device 50 can be tightly strapped to the head.

It can be seen from this that when wearing the head-mounted display device 50 of this embodiment, the user only needs to simply stretch the head-mounted display device 50 and wear it on the head, and the head-mounted display device 50 can be adjusted by the elastic restoring force. The display device 50 is automatically tightened around the head. In this way, the time spent on loosening the knob, adjusting the length and tightening the knob again in the prior art can be saved.

The coupling member 140 is rotatably disposed on the casing 110 and is coupled to the first adjustment section 122B and the second adjustment section 124B at the same time. That is, the first adjusting section 122B and the second adjusting section 124B move relative to the casing 110 synchronously. The first adjusting section 122B and the second adjusting section 124B cannot move independently relative to the housing 110 , which can avoid positional deviation of the housing 110 .

In this embodiment, the material of the first elastic member 132 can be a shape memory alloy, the material of the second elastic member 134 can also be a shape memory alloy, or both can be made of a shape memory alloy. Therefore, the length of the first elastic member 132 and/or the second elastic member 134 can be changed by electric heating. Moreover, the way of electric heating can properly strengthen the tightness of fixing.

FIG. 3A is a partially enlarged schematic view of the braking member of the head-mounted display device in FIG. 1 when it is in the braking position. FIG. 3B is a partially enlarged schematic view of FIG. 3A . Referring to FIG. 3A and FIG. 3B , the braking member 150 is movably disposed on the casing 110 . When the braking member 150 is at the braking position P12 as shown in FIG. 3B , the coupling member 140 is braked to fix the overlapping degree of the first adjusting section 122B and the second adjusting section 124B.

FIG. 4A is a partially enlarged schematic view of the stopper of the head-mounted display device in FIG. 1 when it is in a movable position. FIG. 4B is a partially enlarged schematic view of FIG. 4A . 4A and 4B, the stopper 150 is separated from the coupling member 140 at the movable position P14 as shown in FIG. degree of overlap. Therefore, when the user really tightens the head-mounted display device 50 on the head, the coupling part 140 can be braked by the braking member 150 to prevent the head-mounted display device 50 from being loosened from the head due to shaking or other reasons.

In this embodiment, the coupling member 140 is a gear, but the invention is not limited thereto. The first adjusting section 122B is coupled to the coupling element 140 at one side of the coupling element 140 through the teeth 122B1 , and the second adjusting section 124B is coupled to the coupling element 140 at the other side of the coupling element 140 through the teeth 124B1 .

Please refer to FIG. 3A and FIG. 4A , in this embodiment, the headband module 100 further includes a shape memory alloy part 162 and a reset part 164 . The shape memory alloy part 162 is connected between the casing 110 and the braking part 150 . The reset member 164 is connected between the housing 110 and the braking member 150 . The shape memory alloy part 162 is used for heating and shrinking to drive the braking part 150 to move from the braking position P12 to the movable position P14. The reset member 164 is used for maintaining the brake member 150 at the brake position P12 when the shape memory alloy member 162 is in a power-off state. Therefore, when the user wants to wear the head-mounted display device 50 on the head, the shape memory alloy part 162 is energized and contracted to overcome the elastic force of the reset part 164, thereby driving the braking part 150 to move from the braking position P12 to the movable position P14, In order to allow the first adjusting section 122B and the second adjusting section 124B to move relative to the casing 110 . When the user tightens the head-mounted display device 50 on the head, the shape memory alloy part 162 is powered off, and the reset part 164 drives the brake part 150 to move from the movable position P14 to the brake position P12 by its elastic restoring force. , so as to prevent the first adjustment section 122B and the second adjustment section 124B from moving relative to the housing 110 , so that the head-mounted display device 50 is tightly bound to the user's head. In other embodiments, a general elastic member or other mechanical structure may also be used instead of the shape memory alloy member 162 to actuate the brake member 150 to move between the brake position P12 and the movable position P14 .

Please refer to FIG. 3B and FIG. 4B , in this embodiment, the headband module 100 further includes a positioning member 170 disposed on the casing 110 and having a positioning groove 172 . The stopper 150 has a protrusion 152 . When the braking member 150 is at the braking position P12 , the protrusion 152 is located at a first end 172A of the positioning groove 172 . When the stopper 150 is at the movable position P14, the protrusion 152 is located at a second end 172B of the positioning groove 172 . In addition, the positioning member 170 can also have a sliding slot 174 for limiting the moving direction of the braking member 150 .

In this embodiment, a neck portion 172C of the positioning slot 172 is located between the first end 172A and the second end 172B. The width of the neck 172C is slightly smaller than the width of the bump 152 . Therefore, for the protrusion 152 to pass through the neck 172C, sufficient force must be applied to widen the neck 172C. In other words, when the protrusion 152 is located at the first end 172A of the positioning groove 172 , the positioning member 170 can provide an appropriate force to position the braking member 150 at the braking position P12 . When the protrusion 152 is located at the second end 172B of the positioning groove 172, the positioning member 170 can provide an appropriate force to position the stopper 150 at the movable position P14. The positioning member 170 can also be provided with a slot 176 beside the positioning slot 172 to weaken the structural strength around the positioning slot 172 and facilitate the deformation of the neck portion 172C.

In this embodiment, the material of the reset member 164 can also be a shape memory alloy, that is, the reset member 164 can be energized and contracted to drive the braking member 150 to move from the movable position P14 to the braking position P12. After the protrusion 152 passes through the neck 172C, it can stay stably at the first end 172A or the second end 172B. In other words, when the shape memory alloy piece 162 and the reset piece 164 are powered off, the protrusion 152 can stay stably at the first end 172A or the second end 172B, so as to save power consumption and extend the distance between the shape memory alloy piece 162 and the reset piece 164. service life.

Please refer to FIG. 2 , in this embodiment, the headband module 100 may further include a switch 180 disposed on the casing 110 to enable or disable the shape memory alloy element 162 . The switch 180 can be a mechanical switch, a touch switch or other types of switches. Tactile switches may be actuated using capacitive sensing, pressure sensing, or other means of sensing.

Please refer to FIG. 1 and FIG. 2, when the user wears the head-mounted display device 50, one hand will hold the host 52, and the other hand will grasp the rear headband module 100, pull the two apart and the head-mounted display The device 50 is put on. Therefore, it can be detected that the user's fingers grasp the rear headband module 100 and touch the switch 180 to determine that the user needs to put on and take off the head-mounted display device 50 . The setting position of the switch 180 may be a position that is easy to be grasped by a general user.

1, 2 and 3A, when the user does not actuate the switch 180, the brake member 150 brakes the coupling member 140 to prohibit the first adjustment section 122B and the second adjustment section 124B from moving relative to the housing 110, and the The head-mounted display device 50 is indeed tightened around the user's head. Please refer to FIG. 1, FIG. 2 and FIG. 4A, when the user activates the switch 180, the shape memory alloy part 162 is energized and heated to shrink to drive the brake part 150 to move to the movable position P14, so as to allow the first adjustment section 122B and the second The adjustment section 124B moves relative to the casing 110 , and the user can pull the headband module 100 to put the head-mounted display device 50 on the head at this time. When the user puts on the head-mounted display device 50 and detects that the user's hand leaves the switch 180 , the first elastic member 132 and the second elastic member 134 will be energized and heated to shrink so as to properly increase the degree of tightness. In order to allow enough time for the first elastic member 132 and the second elastic member 134 to act, a short period of time can be delayed, and then the shape memory alloy member 162 is energized and contracted to drive the braking member 150 to move to the braking position P12 for locking.

To sum up, in the head-mounted display device and its headband module of the present invention, the headband module itself has elasticity and can be directly stretched for wearing, and will automatically shrink to adapt to different sizes of heads when released. The headband module can also be stretched directly when you want to take it off, providing a simple and intuitive way to wear it. When a switch is provided, it can be detected that the user touches the headband module to activate the switch, and then the shape memory alloy increases the tightness and fixes it with a brake. When the head-mounted display device needs to be taken off, the user can directly pull the headband module to take it off by touching the switch of the headband module.

50: Head-mounted display device 52: Host 100:Headband module 110: shell 122: The first belt body 122A: first end 122B: the first adjustment section 122B1: teeth 124: second belt body 124A: second end 124B: the second adjustment section 124B1: teeth 132: the first elastic member 134: the second elastic member 140: Coupling piece 150: brake parts 152: Bump 162: Shape memory alloy parts 164: Reset 170: positioning piece 172: positioning slot 172A: first end 172B: second end 172C: Neck 174: Chute 176: slotting 180: switch P12: Brake position P14: movable position

FIG. 1 is a schematic diagram of a head-mounted display device according to an embodiment of the invention. FIG. 2 is a schematic diagram of a disassembled headband module of the head-mounted display device in FIG. 1 . FIG. 3A is a partially enlarged schematic view of the braking member of the head-mounted display device in FIG. 1 when it is in the braking position. FIG. 3B is a partially enlarged schematic view of FIG. 3A . FIG. 4A is a partially enlarged schematic view of the stopper of the head-mounted display device in FIG. 1 when it is in a movable position. FIG. 4B is a partially enlarged schematic view of FIG. 4A .

100:Headband module

110: shell

122: The first belt body

122B: the first adjustment segment

124: second belt body

124B: the second adjustment segment

132: the first elastic member

134: the second elastic member

140: Coupling piece

150: brake parts

170: positioning piece

180: switch

Claims (18)

A head-mounted display device, comprising: a host; A headband mod, including: a shell; A first belt body has a first end and a first adjustment section; A second belt body has a second end and a second adjustment section, wherein the first end and the second end are respectively connected to opposite sides of the main body, the first adjustment section and the second adjustment section are at least accommodated in the housing in a partially overlapping manner; a first elastic member, the two ends of which are respectively connected to the housing and the first adjustment section; A second elastic piece, the two ends of which are respectively connected to the housing and the second adjustment section, wherein the elastic restoring force of the first elastic piece and the second elastic piece is used to drive the first adjustment section and the second adjustment section The adjustment segments move relative to the housing to increase the degree of mutual overlap; A coupling member is rotatably arranged on the casing and simultaneously couples the first adjustment section and the second adjustment section; A braking member is movably arranged on the casing, wherein the braking member brakes the coupling member to fix the overlapping degree of the first adjustment segment and the second adjustment segment when the braking member is in a braking position, and the braking member is in a movable position when separated from the coupling; a shape memory alloy part, connected between the housing and the brake part, used for heating and shrinking to drive the brake part to move from the braking position to the movable position; and A reset part is connected between the housing and the brake part, and is used to keep the brake part at the braking position when the shape memory alloy part is in a power-off state. The head-mounted display device as claimed in claim 1, wherein the headband module further includes a positioning part, which is arranged on the casing and has a positioning groove, wherein the stopper has a protrusion, and the stopper is on the When in the brake position, the protruding block is located at a first end of the positioning groove, and when the braking member is in the movable position, the protruding block is located at a second end of the positioning groove. The head-mounted display device as claimed in claim 2, wherein a neck of the positioning groove is located between the first end and the second end, and the width of the neck is slightly smaller than the width of the protrusion. The head-mounted display device according to claim 1, wherein the reset member is made of shape memory alloy. The head-mounted display device as claimed in claim 1, wherein the headband module further includes a switch disposed on the housing for turning on or off the shape memory alloy element. The head-mounted display device as claimed in claim 5, wherein the switch is a mechanical switch or a touch switch. The head-mounted display device as claimed in claim 1, wherein the material of the first elastic member is a shape memory alloy. The head-mounted display device as claimed in claim 7, wherein the material of the second elastic member is a shape memory alloy. The head-mounted display device as claimed in claim 1, wherein the coupling member is a gear. A headband module, comprising: a shell; A first belt body has a first end and a first adjustment section; A second belt body has a second end and a second adjustment section, wherein the first end and the second end are respectively connected to opposite sides of a host, the first adjustment section and the second adjustment section are at least accommodated in the housing in a partially overlapping manner; a first elastic member, the two ends of which are respectively connected to the housing and the first adjustment section; A second elastic piece, the two ends of which are respectively connected to the housing and the second adjustment section, wherein the elastic restoring force of the first elastic piece and the second elastic piece is used to drive the first adjustment section and the second adjustment section The adjustment segments move relative to the housing to increase the degree of mutual overlap; A coupling member is rotatably arranged on the casing and simultaneously couples the first adjustment section and the second adjustment section; A braking member is movably arranged on the casing, wherein the braking member brakes the coupling member to fix the overlapping degree of the first adjustment segment and the second adjustment segment when the braking member is in a braking position, and the braking member is in a movable position when separated from the coupling; a shape memory alloy part, connected between the housing and the brake part, used for heating and shrinking to drive the brake part to move from the braking position to the movable position; and A reset part is connected between the housing and the brake part, and is used to keep the brake part at the braking position when the shape memory alloy part is in a power-off state. The headband module as claimed in claim 10 further includes a positioning part, which is arranged on the housing and has a positioning groove, wherein the braking part has a protrusion, and when the braking part is in the braking position, the protrusion Located at a first end of the positioning groove, when the stopper is at the movable position, the protrusion is located at a second end of the positioning groove. The headband module as claimed in claim 11, wherein a neck of the positioning groove is located between the first end and the second end, and the width of the neck is slightly smaller than the width of the protrusion. The headband module according to claim 10, wherein the reset member is made of shape memory alloy. The headband module as claimed in claim 10 further includes a switch disposed on the housing for turning on or off the shape memory alloy. The headband module as claimed in claim 14, wherein the switch is a mechanical switch or a touch switch. The headband module according to claim 10, wherein the material of the first elastic member is shape memory alloy. The headband module as claimed in claim 16, wherein the second elastic member is made of shape memory alloy. The headband module as claimed in claim 10, wherein the coupling member is a gear.

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