JP5070980B2 - Output device and head mounted display - Google Patents

Description

  The present invention relates to an output device such as a headphone or a head-mounted display that allows a user to enjoy sound and enjoy images and sound while being mounted on the user's head.

  When an output device such as a head-mounted display (hereinafter abbreviated as HMD) is mounted on a user's head, the user can enjoy images and sound simultaneously. In recent years, various types of HMDs have been manufactured. Yes. Some HMDs that are currently manufactured incorporate a battery unit in the HMD body (particularly the speaker unit). For example, Patent Document 1 describes a technique of HMD incorporating a battery unit.

JP 2002-232810 A

  As the HMD battery, a secondary battery such as a lithium ion secondary battery or a lithium polymer secondary battery is often used. In these secondary batteries, when charging and discharging are repeated, heat may be generated and the internal electrolyte may vaporize, although it is rare. In that case, it is known that the internal pressure of the battery increases and the battery expands. When the battery expands, the wall surface of the battery hits the cover member of the battery unit that houses the battery. When the cover member prevents the battery from expanding, the battery does not operate normally, and the inside of the battery and the unit may be damaged.

  Conventionally, the battery is arranged in either the left or right audio output unit. However, in an audio output unit premised on stereo reproduction, it is desirable that the left and right sides have the same or symmetrical structure in consideration of the influence on the sound quality such as the resonance frequency. In particular, considering the above-described measures against battery expansion, it is necessary to consider the influence on sound quality.

  An object of the present invention is to provide a technique for taking measures against the expansion of a battery while avoiding affecting the sound quality in an HMD that needs to accommodate the battery.

  The present invention provides an output device including an audio output unit that outputs audio and a battery storage unit that stores a battery, wherein the battery storage unit includes a detachable cover member, and a battery chamber is formed therein. The battery housing, a lock member that engages with a part of the cover member and locks the cover member when the cover member is attached to the housing, and the battery chamber. A displacement transmitting member that transmits the expansion displacement of the battery to the lock member and disengages the lock member from a part of the cover member.

  According to the present invention, in an output device such as a head-mounted display, it is possible to take measures against battery expansion while avoiding affecting the sound quality.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows an example of an HMD according to an embodiment of the present invention.

  1 is a monocular HMD, FIG. 1A is a perspective view of the HMD 100, and FIG. 1B is a side view of the HMD 100. FIG.

  The HMD 100 includes an audio output unit 110, an electric circuit unit 120, a connection unit 130, a headband 140, an image output unit 150, an arm 160, and an arm support unit 170.

  The audio output unit 110 converts an audio output signal output from an audio output device (not shown) into audio and outputs it. In the present embodiment, the audio output unit 110 is provided with a right audio output unit 110R and a left audio output unit 110L. The audio output unit 110 also functions as an abutting portion to the ear when the HMD is worn on the user's head, together with the headband 140 described later.

  The audio output unit 110 is connected to a cable (not shown) for receiving an audio output signal output from an audio output device (not shown).

  The electric circuit unit 120 includes a battery storage unit 121 that can store a battery, and supplies power from the battery to the audio output unit 110 and an image output unit 150 described later.

  In the present embodiment, the electric circuit unit 120 is provided independently of any of the audio output units 110R and 110L, as shown in FIGS. However, it is mechanically and electrically connected. In the present embodiment, it is connected to the right audio output unit 110R. Of course, it may be provided on the left audio output unit 110L side. In addition, the electric circuit unit 120 includes an operation unit 122 described later, and receives an instruction signal from the operation unit 122. The electric circuit unit 120 supplies the received instruction signal to the sound output unit 110 and the image output unit 150.

  2 and 3 are cross-sectional views showing a configuration example of the electric circuit unit 120. FIG. The electric circuit unit 120 includes a battery housing unit 121 and an operation unit 122. The battery accommodating part 121 and the operation part 122 are formed in the shape of the housing | casing A as shown in FIG. In this embodiment, the casing A is provided as if it was provided on a part of the headband 140 or at a position where the end of the headband 140 was replaced.

  The battery housing part 121 includes a battery chamber 1210, a cover member 1211, a lock member 1212, a pressure contact member 1213, and a displacement transmission member 1214.

  The electric circuit unit 120 is connected to the audio output unit 110R at one end thereof. Since the battery accommodating part 121 is provided in the electric circuit part 120, it will be accommodated in a housing different from the audio output part 110R. Therefore, it can be said that the battery accommodating part 121 and the battery accommodated have little influence on the sound quality of the audio output part 110R.

  The battery chamber 1210 forms a space in which the flat battery 200 accommodates the battery 200 so that the flat surface is along the extending direction of the headband 140 when the user wears the HMD 100. The battery chamber 1210 is opened on the surface of the housing A opposite to the surface to which the audio output unit 110R is attached. Specifically, when the head-mounted display is mounted on the user's head, the head-mounted display opens on a surface that does not face the head. A cover member 1211 is prepared to close the opening.

  A space 1210A for accommodating the displacement transmitting member 1214 is provided on the back side of the battery chamber 1210 when viewed from the opening. Further, a lock member 1212 is provided on a wall surface (opposite surface of the cover member 1211) 1210B on the back side of the battery chamber 1210 so as to be displaceable. Further, when the battery is accommodated, a pressure contact member 1213 is disposed on one side surface of the battery and is in pressure contact with the side surface of the battery.

  The battery chamber 1210 has a hooking portion 1210C that hooks and supports an attachment portion 1211B of a cover member 1211 described later.

  The lock member 1212 has a hook portion 1212A for detachably attaching to the wall surface 1210B of the battery chamber 1210, a claw portion T that engages with an engagement hole H provided in the locking piece 1211C of the cover member 1211, and It has the latching | locking part 1212C which supports the nail | claw part T, and the support part 1212B which supports the latching | locking part 1212C and the hook part 1212A (FIG.3 (b)). The claw T of the lock member 1212 is fitted into a hole H provided in a locking piece 1211C of the cover member 1211 described later, thereby fixing the cover member 1211.

  When the cover member 1211 is attached to the opening of the housing A, the claw portion T engages with the hole H and locks the detachment of the cover member 1211. Further, the support 1212B receives a displacement due to the extension of the displacement transmitting member 1214 in the second direction (Y direction in FIG. 3B), and the support 1212B is displaced by this displacement, so that the claw T is a hole. Detach from part H and disengage.

  The cover member 1211 has a lid portion 1211A, an attachment portion 1211B, and a locking piece 1211C. The lid portion 1211A is disposed so as to cover the opening of the battery chamber 1210. The attachment portion 1211B can be hooked on the hook portion 1210C of the battery chamber 1210. As shown in FIG. 3A, the locking piece 1211 </ b> C is provided with a hole H, and can engage with the claw T of the lock member 1212.

  The pressure contact member 1213 is made of, for example, a spring material. The pressure contact member 1213 is in pressure contact with the side surface of the battery 200 housed in the battery chamber 1210 to fix the battery.

  When the displacement transmitting member 1214 contracts in the first direction (for example, the X-axis direction in FIG. 3B), the displacement transmitting member 1214 extends in a different second direction (for example, the Y-axis direction in FIG. 3B). , A structure that changes direction and transmits displacement. In the present embodiment, the displacement transmission member 1214 includes a first member 12141 and a second member 12142. The first member 12141 has a flat portion 12141C partly in contact with the battery bottom surface, and its both sides 12141B and 12141D are beveled and bent into a substantially trapezoidal shape. One end portion 12141A of the first member 12141 is connected to the lock member 1212 and disposed at a position pressed in the first direction (for example, the X-axis direction in FIG. 3B) by the expansion of the battery. A displacement in the X-axis direction due to the expansion of the battery 200 is converted into a displacement in the Y-axis direction and transmitted to the lock member 1212.

  The displacement transmitting member 1214 has a portion 1214G where the first member 12141 and the second member 12142 intersect in an X shape as shown in FIG. 3B, for example. By providing the second member 12142 and intersecting in an X shape, the battery can be stably supported.

  The first member 12141 and the second member 12142 may be constituted by two members or may be constituted by an integral member. In any case, when the displacement transmission member 1214 contracts in the first direction (X-axis direction in FIG. 3B), it extends in a second direction (Y-axis direction in FIG. 3B) perpendicular thereto. Constructs a stretchable structure. In this embodiment, it has the structure which has elasticity. For example, it is made of a spring material. Specifically, it is formed by folding a plate-like or ribbon-like spring material. Of course, it is not limited to this.

  The displacement transmission member 1214 is disposed between the battery 200 and the wall surface 1210B of the battery chamber 1210. One end portion 12141A of the displacement transmission member 1214 is connected to the support portion 1212B of the lock member 1212. For this reason, the displacement transmitting member 1214 is pressed in the first direction (X-axis direction) due to the expansion of the battery 200, is displaced so as to contract in the X-axis direction, and extends in the second direction (Y-axis direction). The displacement is transmitted to the support portion 1212B of the lock member 1212.

  The lock member 1212 is displaced so that the support portion 1212B receives the displacement due to the extension of the displacement transmitting member 1214 in the Y-axis direction, and the locking portion 1212C is moved away from the locking piece 1211C in the Y-axis direction. As a result, the claw T is released from the hole H of the cover member, and the engagement between the two is released.

  The displacement transmitting member 1214 generates tension when a force in the second direction is applied. For example, when the cover member 1211 is attached to the opening of the housing A, when the locking piece 1211C presses the claw portion T, the locking portion 1212C and the support portion 1212B are displaced. Due to this displacement, a force extending in the second direction at the connecting portion 12141A is transmitted to the displacement transmitting member 1214 connected to the support portion 1212B, and tension is generated in the displacement transmitting member 12141. Here, when the claw T reaches the position of the hole H, the support 1212B and the locking portion 1212C of the lock member 1212 are displaced in the Y-axis direction by the tension of the displacement transmission member 1214, and the claw T is moved. Insert into hole H. Thereby, the engagement state of the cover member 1211 and the lock member 1212 is maintained.

  The displacement transmission member 1214 is urged by pressing in the X-axis direction, and acts to extend in the X-axis direction and press the battery 200 when the lock member 1212 is unlocked.

  The operation unit 122 receives support from the user to the HMD main body 100 such as power on / off and volume adjustment from the operation button 1220. The accepted operation is converted into an electric signal in an electric circuit (not shown) and supplied to the audio output unit 110 and the image output unit 150.

  The connection unit 130 is connected to the left audio output unit 110L. In addition, an image output unit 150 described later is connected to the connection unit 130 via an arm 160 and an arm instruction unit 170.

  Note that the connection unit 130 may be provided with the battery housing unit 121 included in the electric circuit unit 120. Further, the connection unit 130 may have a configuration similar to that of the electric circuit unit 120, for example, a configuration that receives an instruction signal from the operation unit 122.

  The headband 140 has a curved shape so that the user's head can be pinched. And the electric circuit part 120 and the connection part 130 are connected and fixed to both ends. The headband 140 may be provided with wiring (not shown) for transmitting an audio output signal from the audio output device.

  The image output unit 150 converts an image output signal output from an image output device (not shown) into an image and outputs the image. In the present embodiment, the image output unit 150 is connected to and supported by the connection unit 130 via the arm 160 and the arm support unit 170.

Next, the operation of the battery housing part 121 when the battery 200 is not expanded and when the battery is expanded will be described with reference to FIGS.
(When battery is not expanded)
First, when the battery 200 is not expanded, as shown in FIG. 4A, the cover member 1211 is caught by the attachment portion 1211B of the cover member 1211 and the hooking portion 1210C of the battery chamber 1210. The hole H of the locking piece 1211C of the member 1211 and the claw portion T of the locking portion 1212C of the lock member 1212 are fixed to each other, thereby being fixed. Thereby, the battery 200 is fixed in the battery chamber 1210.

In this case, the displacement transmission member 1214 is lightly pressed by a battery having a normal thickness. However, it is not displaced to the extent that the lock member 1212 is displaced. On the other hand, the tension acts against the displacement of the claw T in the direction away from the hole H, and this is in a state of suppressing this.
(When the battery expands)
On the other hand, the operation of the battery housing part 121 when the battery 200 expands will be described.

  The battery 200 may expand due to repeated charging and discharging. In that case, the battery 200 is restrained by a cover member 1211 that covers the battery chamber 1210. For this reason, the displacement force of the battery due to the expansion of the battery acts on the displacement transmission member 1214. When the pressure by the battery 200 acts on the flat portion 12141C of the first member 12141 of the displacement transmission member 1214, the slope portions 12141B and 12141D of the first member 12141 are displaced so that the angle is opened, that is, the displacement transmission member 1214. Extends in the Y-axis direction, and one end 12141A of the first member 12141 is displaced to displace the lock member 1212 in the Y-axis direction shown in FIG. 3B (the direction of the arrow in FIG. 4B). At this time, the displacement transmitting member 1214 is displaced and biased so as to contract in the X-axis direction, that is, potential energy due to elasticity is accumulated.

  The locking member 1212 is displaced, and the claw portion T is displaced together with the locking portion 1212C so as to move away from the locking piece 1211C of the cover member 1211. As a result, the claw portion T of the locking portion 1212C of the locking member 1212 is removed from the hole H of the locking piece 1211C of the cover member 1211. Therefore, the engagement of the claw T with the hole H is released. That is, the lock is released (FIG. 4C).

  Note that when the lock between the hole H of the locking piece 1211C of the cover member 1211 and the claw portion 1212T of the locking portion 1212C of the lock member 1212 is released, the displacement transmission member 1214 is biased by the displacement in the X-axis direction. Is released. At this time, the battery 200 is pushed in the opening direction by the displacement transmitting member 1214.

  Depending on the usage status of the head mounted display, the expanded battery 200 falls from the HMD together with the cover member 1211 as shown in FIGS. 5A and 5B due to the weight of the battery.

  In the present embodiment, since the opening of the battery chamber 1210 is on the surface that does not face the user's head, the battery 200 is arranged such that the surface having the maximum area of the flat battery 200 is substantially perpendicular to the ground. If the battery chamber 1210 is provided so that the battery 200 can be accommodated, when the battery 200 expands, the battery 200 is discharged in a direction away from the user and falls in the back direction or the chest direction of the user.

  In addition, since the cover member 1211 in this embodiment has a structure that is removed from the opening, the cover member 1211 and the expanded battery 200 are discharged together with unlocking.

  In the present embodiment, the influence on the sound quality can be reduced by configuring the battery housing unit 121 in a separate housing from the audio output unit 110. Therefore, the left and right sound chamber characteristics do not differ.

  In addition, although this embodiment demonstrated HMD, this invention is applicable to the headphones which output only an audio | voice.

(A) It is a perspective view which shows one Embodiment of the head mounted display which concerns on this invention. (B) It is a side view which shows one Embodiment of the head mounted display which concerns on this invention. It is sectional drawing which shows one structural example of the electric circuit part which concerns on this invention. (A) It is a top view of a cover member in FIG. (B) It is an enlarged view of an electric circuit part in FIG. It is sectional drawing of the electric circuit part of the state which the battery expanded. It is sectional drawing of the electric circuit part of the state which the battery expanded.

Explanation of symbols

100: HMD, 110: Audio output unit, 120: Electric circuit unit, 121: Battery housing unit, 1210: Battery chamber, 1210A: Space for housing the displacement transmitting member, 1210B: Wall surface, 1210C: Hooking unit, 1211: Cover member 1211A: Lid portion, 1211B: Mounting portion, 1211C: Locking piece, H: Hole portion, 1212: Lock member, 1212A: Hook portion, 1212B: Support portion, 1212C: Locking portion, T: Claw portion, 1213: Press contact Member, 1214: displacement transmission member, 12141: first member, 12141A: one end of displacement transmission member, 12141B: slope portion, 12141C: flat portion, 12141D: slope portion, 12142: second member, 1214G: crossing portion, 122: operation unit, 1220: operation button, 130: connection unit, 140: headband, 150: image output unit, 60: Arm, 170: arm support, A: a housing, 200: battery

Claims (7)

In an output device including an audio output unit that outputs audio and a battery storage unit that stores a battery,
The battery housing portion includes a detachable cover member, and a housing in which a battery chamber is formed, and a portion of the cover member when the cover member is attached to the housing. And a lock member that locks the detachment of the cover member, and an expansion displacement of the battery accommodated in the battery chamber is transmitted to the lock member, and the lock member engages with a part of the cover member. An output device comprising: a displacement transmission member that removes The output device according to claim 1,
When the displacement transmission member is contracted in the first direction, the displacement transmission member extends in a second direction different from the first direction, changes the direction and transmits the displacement, and has one end connected to the lock member, Disposed in a position pressed in the first direction by expansion of the battery, and transmitting displacement in the first direction due to expansion of the battery to the lock member;
The output device according to claim 1, wherein the lock member releases the engagement with a part of the cover member when receiving the displacement due to the extension of the displacement transmitting member. The output device according to claim 2,
The displacement transmission member has elasticity, and maintains an engagement state with a part of the cover member by the lock member by tension in the second direction;
An output device characterized by. The output device according to claim 3,
The output device, wherein the displacement transmitting member is urged by pressing in the first direction and extends in the first direction to press the battery when unlocked by the locking member. In the output device according to any one of claims 1, 2, 3, and 4,
The cover member has, in a part thereof, a locking piece having a hole for engaging with the lock member,
The lock member includes, in part, a locking portion having a claw portion that engages with the hole portion, and a support portion that supports the locking portion so that the locking portion can be displaced. When the cover member is attached to the opening of the housing, the cover member engages with the hole portion to lock the detachment of the cover member, and the displacement due to the extension of the displacement transmitting member in the second direction is The support part receives, and due to this displacement, the locking part is displaced, the claw part is detached from the hole part, and the engagement is released.
An output device characterized by. The output device according to any one of claims 1, 2, 3, 4 and 5.
The output device, wherein the battery storage unit is provided apart from the audio output unit. 7. A head mounted display, wherein the output device according to any one of claims 1, 2, 3, 4, 5, and 6 is provided with an image output unit that outputs an image.

Images