JP2012022255A - Head mounting type optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress damage to an optical unit by reducing the impact load applied to the optical unit when the optical unit falls.SOLUTION: A head mounting type optical device 1 comprises: an optical unit 2 arranged in front of the eyes of a user A and providing information visible to the user A; head mounting means 3 fixed to the head in a state of tightly contacting to the forehead of the user A; and a connection part 4 connecting the head mounting means 3 with the optical unit 2. The connection part 4 is provided with cushioning means 4a reducing the impact load applied to the optical unit 2 from the head mounting means 3.

Description

  The present invention relates to a head-mounted optical device.

  Conventionally, an optical unit having a display arranged in front of both eyes of the wearer, a head mounting portion for mounting the optical unit on the head of the wearer, and swinging the optical unit with respect to the head mounting portion 2. Description of the Related Art A head-mounted optical visual device including a hinge that can be connected is known (see, for example, Patent Document 1).

JP-A-9-90271

  However, a head-mounted device such as the optical visual device of Patent Document 1 needs to be attached to and detached from the head, and always includes a risk of dropping. And if it falls, it will fall from the heavy optical unit, but at that time, the load of the head mounting part is applied to the optical unit through the hinge, so not only the optical unit but also the hinge and head mounting A large impact due to the weight of the part is applied to the optical unit, and there is a disadvantage that the optical unit is damaged.

  The present invention has been made in view of the above-described circumstances, and provides a head-mounted optical device that can reduce the impact load applied to the optical unit when dropped and suppress the damage of the optical unit. The purpose is that.

In order to achieve the above object, the present invention provides the following means.
The present invention includes an optical unit that is disposed in front of a user's eyes and supplies information that is visible to the user, a head mounting means that is fixed to the head while being in close contact with the forehead of the user, A head-mounted optical device including a head-mounting unit and a coupling unit that couples the optical unit, and the coupling unit includes a buffer unit that reduces an impact load applied to the optical unit from the head-mounting unit. provide.

  According to the present invention, when the head mounting means is fixed to the head in close contact with the user's forehead, the optical unit is disposed in front of the user's eyes and can supply information visible to the user. it can. When such a head-mounted optical device falls from a high place, it will fall first from the heavy optical unit. At that time, the head-mounted means is provided by the buffer means provided in the connecting portion. Since the impact load applied to the optical unit is reduced, the impact due to the load of the head mounting means is avoided from being applied to the optical unit, and the impact can be reduced to reduce damage to the optical unit.

In the said invention, the said buffer means may be comprised by forming the said connection part with the elastic member which deform | transforms with the impact load more than a predetermined threshold value.
By doing so, it is possible to prevent the load of the head mounting means from being transmitted to the optical unit side by elastically deforming the elastic member, and the optical unit is not subjected to a load exceeding a predetermined impact load. As a result, the impact can be easily reduced and damage to the optical unit can be reduced.

In the above invention, a pair of the optical units may be arranged corresponding to both eyes of the user, and the connecting portion may be disposed at one approximate center position of the pair of optical units.
By doing in this way, even if the optical unit falls from any position, the transmission of the load from the head mounting means to the optical unit is avoided by one connecting portion, and the impact can be reduced more reliably.

Moreover, in the said invention, the said connection part may have a cross-sectional shape long in the arrangement direction of the said optical unit, and short in the direction orthogonal to this arrangement direction.
By doing so, it is possible to increase the section modulus in the arrangement direction of the optical units to make it difficult to deform the connecting portion, and to reduce the section coefficient in the direction orthogonal to the arrangement direction to facilitate the deformation of the connecting portion. . Thereby, the shaking of the optical unit at the time of use can be prevented.

Moreover, in the said invention, the said buffer means may be comprised by the attachment / detachment mechanism which detach | leaves with the impact load more than a predetermined threshold value.
In this way, when an impact load of a predetermined threshold value or more is applied to the optical unit, the attaching / detaching mechanism that constitutes the buffer means can be detached so that no further impact load is applied to the optical unit. . Thereby, an impact can be reduced easily and damage to an optical unit can be reduced.

  According to the present invention, there is an effect that it is possible to reduce the impact load applied to the optical unit when it is dropped and to suppress the damage of the optical unit.

It is a top view which shows the state which mounted | wore the user's head with the head-mounted optical apparatus which concerns on one Embodiment of this invention. It is a side view which shows the state with which the head mounting | wearing type optical apparatus of FIG. 1 was mounted | worn on the user's head. It is an enlarged view which shows the buffer part of the head mounting | wearing type optical apparatus of FIG. 1 in detail. It is a front view which shows the state which elastically deformed the buffer part of the head-mounted optical apparatus of FIG. It is a longitudinal cross-sectional view of the connection state which shows the modification of the buffer means of the head mounted optical apparatus of FIG. It is a longitudinal cross-sectional view which shows the isolation | separation state of the buffer means of FIG. It is a side view which shows the state with which the modification of the head mounting | wearing type optical apparatus of FIG. 1 was mounted | worn on the user's head. It is a top view which shows the state with which the other modification of the head-mounted optical apparatus of FIG. 1 was mounted | worn on the user's head.

A head-mounted optical device 1 according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the head-mounted optical device 1 according to the present embodiment includes an optical unit 2, a frame portion 3, and a connecting portion 4 that connects them.

  The optical unit 2 is, for example, a display device, and includes a display unit (covering an optical element such as a pair of LCDs and prisms arranged in front of both eyes of the user A and a control circuit) An optical unit) 5 and a connection portion 6 for connecting the interval of the display portion 5 so as to be adjustable. The connecting part 6 is fitted with fitting holes 5 a and 5 b provided in the pair of display parts 5, so that the two parallel rail members are arranged so as to be spanned over the pair of display parts 5. 7 and 8 are provided.

  By fitting the rail members 7 and 8 and the fitting holes 5a and 5b so as to be relatively movable, the display unit 5 is moved in the longitudinal direction of the rail members 7 and 8 so as to match the eye width of the user. Thus, the interval of the display unit 5 can be adjusted. By extending the two rail members 7 and 8 in parallel, the pair of display portions 5 can always be held at the same relative angular position.

  The frame portion 3 is an annular member that is wound around the head of the user A over the entire circumference, and is pressed against the pad portion 3 a that is pressed against the forehead of the user A and the back head of the user A. And a pad portion 3b. The frame portion 3 can be adjusted in circumference in accordance with the size of the user A's head.

  The connecting portion 4 includes a rod-like buffer portion (buffer means) 4 a whose one end is fixed to the frame portion 3, and a unit-side fixing portion 4 b provided at the other end of the buffer portion 4 a and attached to one rail member 7. It has. The buffer portion 4a is made of, for example, an elastic material such as rubber, and is bent by a load exceeding a predetermined threshold value. As shown in FIG. 3, the connecting portion 4 is fixed by fastening a buffer portion 4a with a screw 4d between the unit side fixing portion 4b and the frame side fixing portion 4c.

In addition, by configuring the rail member 7 in a round bar shape, the unit-side fixing portion can be swung with respect to the rail member, and thereby the inclination angle of the optical unit 2 with respect to the frame portion 3 is adjusted. Be able to.
In the present embodiment, the connecting portion 4 is connected to the rail member 7 at the central position of the two display portions 5.

The operation of the head-mounted optical device 1 according to this embodiment configured as described above will be described below.
In order to use the head-mounted optical device 1 according to the present embodiment, the user A covers the frame unit 3 in a state of being sufficiently larger than the circumference of the head, and the pair of display units of the optical unit 2 At a position where 5 is placed in front of both eyes, the pad portion 3a is pressed against the forehead and the frame portion 3 is contracted, so that the head is fastened and fixed.

Further, by moving the fitting holes 5a and 5b provided in the display unit 5 along the longitudinal direction of the rail member, the two displays are arranged so that the two display units 5 can be easily seen by both eyes. The position of the part 5 is adjusted according to the eye width.
Thereby, it is possible to provide the user A with information that can be viewed via the display unit 5. When it is not necessary to provide information via the display unit 5, the user A swings the optical unit 2 by rotating the rail member 7 with respect to the unit-side fixing unit 4 b of the connecting unit 4. Can be flipped up and the visual field of view can be expanded. Also, the user A can obtain external information visually from the gap around the display unit 5 of the optical unit 2 even when the display unit 5 is disposed in front of the eyes.

Then, the head-mounted optical device 1 according to the present embodiment is optically calculated from the weight ratio of the optical unit 2 and the frame unit 3 when it is dropped for some reason when mounted on the head or removed from the head. The unit 2 is likely to fall down and the optical unit 2 receives an impact from the ground.
In this case, according to the head-mounted optical device 1 according to the present embodiment, the optical unit 2 and the frame portion 3 are connected by the buffer portion 4a made of an elastic material. As described above, it is possible to prevent the weight of the frame portion 3 from being applied to the optical unit 2 by elastically deforming the buffer portion 4a.

  As a result, the impact load applied to the optical unit 2 can be considered by excluding the weight of the frame portion 3, and the allowable range of the impact resistance load can be increased. That is, there is an advantage that the impact load applied to the optical unit 2 when it is dropped can be reduced and damage to the optical unit 2 can be suppressed.

  Moreover, in this embodiment, since the connection part 4 was provided in one center of the optical unit 2, even if it falls from which display part 5, the connection part 4 can be functioned similarly and can be buffered. . Moreover, the connection part 4 provided in one center also has an advantage that the gap around the display part 5 can be suppressed to a minimum.

  In the present embodiment, the buffer portion 4a made of an elastic material constituting the connecting portion 4 is attached to the rail member by the unit side fixing portion 4b so as to be swingable. Instead, the buffer portion made of an elastic material is used. A through hole may be provided in 4a itself, and the rail member 7 may be movably penetrated.

  Moreover, you may decide to form the cross-sectional shape of the buffer part 4a so that it may be thick in the left-right direction and thin in the front-back direction. By doing in this way, the cross-sectional area of the left-right direction is enlarged and it becomes difficult to elastically deform. Thereby, in the mounting state on the user A's head, there is an advantage that wobbling of the left and right display units 5 can be prevented.

Further, in the head-mounted optical device 1 according to the present embodiment, the buffer portion 4a is exemplified by an elastic material such as rubber. However, the present invention is not limited to this, and FIGS. As shown, an attachment / detachment mechanism 10 that is detached by an impact at the time of dropping may be employed.
That is, the attachment / detachment mechanism 10 includes holding units 11 and 12 provided in the optical unit 2 and the frame unit 4, and a connecting member 13 provided in the holding units 11 and 12 detachably. .

  The holding portions 11 and 12 are provided with fitting recesses 11a and 12a for fitting the end portions of the connecting member 13, and ball plungers 14 are provided on the inner walls of the fitting recesses 11a and 12 respectively. The ball plunger 14 includes a ball 14a housed in a lateral hole provided in the inner wall of the fitting recess 11a, 12a, and a spring 14b that urges the ball 14a to protrude into the fitting recess 11a, 12a. It has.

  The connecting member 13 is provided with a recess 13 a that is disposed at a position that coincides with the lateral hole of the ball plunger 14 in a state of being fitted into the fitting recesses 11 a and 12 a of the holding portions 11 and 12. As shown in FIG. 5, when the connecting member 13 is fitted into the fitting recesses 11 a and 12 a of the holding portions 11 and 12, the ball 14 a of the ball plunger 14 protrudes and engages with the recess 13 a, and the connecting member 13 is engaged. The holders 11 and 12 are prevented from coming off.

  The engagement between the ball 14a and the recess 13a of the ball plunger 14 is released when a predetermined impact load is applied. Therefore, when the head-mounted optical device 1 according to the present embodiment is dropped, the ball 14a and the recess 13a are disengaged as shown in FIG. It is possible to prevent the load of the portion 3 from being applied to the optical unit 2.

  In the head-mounted optical device 1 according to the present embodiment, the one having the pair of display units 5, the one capable of adjusting the interval between the pair of display units 5, and the entire optical unit 2 with respect to the frame unit 3. However, the present invention is not limited to this, and the optical unit 2 with respect to the frame unit 3 is integrally provided with the two display units 5 for the left and right eyes. You may employ | adopt what was fixed so that the whole might not rock | fluctuate.

  In the head-mounted optical device 1 according to the present embodiment, the head A is mounted on the user A's head only by the frame unit 3. Instead, as shown in FIG. 7, a nose pad portion 10 may be provided in the connecting portion 4, and the nose pad portion 10 and the frame portion 3 may be attached to the user A's head. This makes it easy to position the head-mounted optical device 1 with respect to the user A's head.

  Further, in the head-mounted optical device 1 according to the present embodiment, the circumference of the frame unit 3 is adjusted, but other modes may be used. For example, as shown in FIG. 8, an elastically deformable band member 11 may be provided at the end of the frame portion 3 and a part of the band member 11 may be held by a clamp 12.

  The user A can place the head-mounted optical device 1 on the head in a state where the holding force to the band member 11 by the clamp 12 is weakened, and then adjust the positions of the band member 11 and the clamp 12. it can. Then, while maintaining the state where the holding force of the clamp 12 is weakened, the band member 11 and the frame 3 are fixed so that the head is in close contact with the band member 11 and the frame 3 by tightening the band member 11 with the clamp 12. Can be placed. When the hand is released from the clamp 12 and the holding force of the clamp 12 is restored, the head-mounted optical device 1 can be kept in close contact with the head. Examples of the band member 11 include rubber.

  Further, in the head-mounted optical device 1 according to the present embodiment, the frame unit 3 is an annular member, but other modes may be used. For example, as the frame part 3, a headset type frame in which a frame is arranged not only on the side of the head but also on the top of the head, or a helmet type that covers the entire head can be appropriately selected.

  Moreover, although what has the display part 5 was illustrated as the optical unit 2, it may replace with this and may employ | adopt the magnifying glass which expands and supplies the information of the external field visible with respect to the user A.

A User 1 Head-mounted optical device 3 Frame (head mounting means)
4 connection part 4a buffer part (buffer means)
5 Display unit (optical unit)
10 Detachment mechanism (buffer means)

Claims (5)

An optical unit that is placed in front of the user's eyes to supply information visible to the user;
A head mounting means that is fixed to the head while being in close contact with the forehead of the user;
A connecting portion for connecting the head mounting means and the optical unit;
A head-mounted optical device in which the connecting portion includes buffer means for reducing an impact load applied to the optical unit from the head-mounted means.   The head-mounted optical device according to claim 1, wherein the buffer means is formed by forming the connecting portion by an elastic member that is deformed by an impact load equal to or greater than a predetermined threshold. A pair of the optical units corresponding to both eyes of the user;
The head-mounted optical device according to claim 1, wherein the connecting portion is disposed at a substantially central position of the pair of optical units.   The head-mounted optical device according to claim 3, wherein the connecting portion has a cross-sectional shape that is long in the arrangement direction of the optical units and short in a direction perpendicular to the arrangement direction.   The head-mounted optical device according to claim 1, wherein the buffer means is configured by an attachment / detachment mechanism that is detached by an impact load equal to or greater than a predetermined threshold.

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