JP5371267B2 - Winding device - Google Patents

Description

  The present invention relates to a winding device for a flexible member.

A head-mounted display (HMD) is well known as a head-mounted display device. The HMD is widely used because it allows easy viewing of video on a large screen, easy stereoscopic viewing, and movement with the user. The HMD mounting mechanism includes a belt-like flexible member that tightens the periphery of the head, a front head pressing portion and a back head pressing portion, and the head pressing portion is moved back and forth to press and loosen the head. What is attached and detached by doing is well known. Patent Document 1 discloses a type using a wire as a mounting mechanism that can be easily mounted while holding the HMD with one hand.
JP-A-7-333547

  The winding mechanism disclosed in Patent Document 1 is configured such that the ratchet pawl is detented and locked to the ratchet teeth of the ratchet wheel by the traction force of the spring, and the wound linear member does not return. Therefore, it is impossible to control the return of the linear member other than the latching position between the ratchet teeth and the ratchet pawl, and it may not be possible to stop the winding at the position desired by the operator. I can't get a feeling. As means for solving the above problems, there is means for locking at a fine position by increasing the number of ratchet teeth. However, in order to increase the number of ratchet teeth, it is necessary to configure a ratchet wheel having a large diameter, which is disadvantageous in an HMD that is required to be smaller and lighter. Further, as a winding mechanism, there is a mechanism that uses a one-way mechanism such as a one-way clutch that incorporates a plurality of rollers and can rotate only in one direction. However, when the one-way mechanism is used, if the rotation operation is stopped at a position desired by the operator, the winding can be stopped, but there is a problem that the operation for releasing the reverse rotation is complicated.

  In view of the above problems, an object of the present invention is to improve the operational feeling of a winding device with a simple configuration.

In order to solve the above-described problems, a winding device of the present invention includes, for example, a winding member that can wind a flexible member by rotating, a first rotating member that can rotate, and the winding member. A second rotating member that is rotatable on the same axis, and whose resistance to rotation in a predetermined direction is smaller than the resistance to rotation in a direction opposite to the predetermined direction; and the winding member and the second rotating member and a engaging member for engaged, said engaging member when said first rotating member receives a rotational force in the predetermined rotational direction, and the winding member and the front Stories second rotary member When the winding member is rotated in the predetermined direction along with the rotation of the first rotating member, and the first rotating member receives a rotational force in a rotation direction opposite to the predetermined rotation direction. to release the engagement, that enables rotation of said take-up member to said predetermined direction and the opposite direction And wherein the door.

  According to the present invention, the operability of the winding device can be improved with a simple configuration.

(First embodiment)
FIG. 1 is a diagram illustrating an appearance of a head-mounted head mounted display (HMD) according to the present embodiment. The wearer can observe the displayed image by wearing the HMD on the head.

  Reference numeral 101 denotes a display unit 101 that receives a video signal from a personal computer (PC) or the like and displays the video to a wearer wearing the HMD. The display unit 101 includes a display element for displaying an image such as a charge coupled device (CCD), and an optical system for enlarging the image of the display element and guiding it to the wearer wearing the HMD. Yes.

  Reference numeral 102 denotes a frame 102 that covers the side and top of the wearer. The frame 102 has a shape that covers the left and right sides of the wearer's temporal region and straddles the top of the head, and is coupled to the display unit 101.

  103 is a tube 103 that surrounds the back of the head of the wearer. The tube 103 has a bellows shape that can be expanded and contracted, and is coupled and fixed to the frame 102.

  Reference numeral 104 denotes a occipital pad 104 that comes into contact with the occipital region of the wearer, and is coupled and fixed to the tube 103.

  Reference numeral 105 denotes a forehead pad 105 that comes into contact with the wearer's forehead, and is coupled to and fixed to the display unit 101.

  Reference numeral 106 denotes a parietal pad 106 that abuts the wearer's parietal region. As described above, the occipital pad 104, the forehead pad 105, and the parietal pad 106 function as mounting members for allowing the wearer to wear the HMD.

  A wire 107 is disposed so as to pass through the inside of the tube 103, the inside of the frame 102, and the inside of the parietal pad 106. The wire 107 is arranged so as to go out of the frame 102 through a hole 108 formed in the frame 102 and pass through the inside of the parietal pad 106. As described above, the wire 107 functions as a wire member.

  Reference numeral 109 denotes an adjustment unit 109 that adjusts the tension of the wire 107. The tension of the wire 107 can be adjusted by rotating the adjusting unit 109. A specific configuration of the adjustment unit 109 will be described later. One end of the wire 107 is rotatably coupled to a position A of the adjustment unit 109, and the other end is coupled to a position B in the frame 102.

  Reference numeral 110 denotes a guide unit 110 that is coupled to the frame 102 and guides the movement of the parietal pad 106. The parietal pad 106 moves due to the tension of the wire 107, but the movement of the parietal pad 106 is moved in a direction perpendicular to the wearer's parietal portion by the guide of the guide portion 110.

  111 is a leaf spring 111, one end of which is fastened to the top of the frame 102 with a screw or the like, and the other end is fastened to the occipital pad 104 with a screw or the like. Yes.

  FIG. 2 is a diagram showing the HMD of FIG. 1 as viewed from the top of the wearer. Each configuration is the same as in FIG. The adjustment unit 109 has an FF cross section, which is for explaining the internal structure of the adjustment unit 109 in the description to be described later.

  FIG. 3 is a diagram showing the HMD of FIG. 1 from the side of the wearer's temporal region. Each configuration is the same as in FIG. The adjusting portion 109 has a CC cross section, which is for explaining the internal structure of the adjusting portion 109 in the description to be described later.

  The above is the configuration of the HMD in the present embodiment. When the wearer rotates the adjustment unit 109, the wire 107 is wound up. When the wire 107 is wound, the occipital pad 104 and the top pad 106 coupled to the wire 107 move in a direction to tighten the wearer's head. That is, the HMD is fixed to the wearer's head by rotating the adjustment unit 109. In order to loosen the tightening of the occipital pad 104 and the parietal pad 106, the adjustment unit 109 may be rotated in the reverse direction. Next, the structure of the adjustment unit 109 in this embodiment will be described.

  FIG. 4 is a view showing the structure of the adjusting portion 109 on the CC cross section of FIG.

  FIG. 5 is a view showing the structure of the adjusting portion 109 on the FF cross section of FIG. Hereinafter, the structure of the adjusting unit 109 will be described with reference to FIGS. 4 and 5.

  Reference numeral 401 denotes an adjustment dial 401 that is rotated by a manual operation of the wearer. The adjustment dial 401 functions as a rotatable first rotating member. The adjustment dial 401 is preferably cylindrical.

  Reference numeral 402 denotes a support shaft 402 disposed on the rotation shaft of the adjustment dial 401. The support shaft 402 has a threaded portion 403 at one end and is fastened to the frame 201 by a nut 404.

  Reference numeral 405 denotes a one-way clutch 405 disposed on the support shaft 402. The one-way clutch 402 is rotatable only in a predetermined direction with the support shaft 402 as a rotation axis. In the present embodiment, it is possible to rotate only clockwise in FIG. Since the structure of the one-way clutch is a known technique, the description thereof is omitted here.

  Reference numeral 406 denotes a polygonal piece 406 that is press-fitted into the one-way clutch 405. Since the one-way clutch 402 is press-fitted and fitted, the polygonal piece 406 can rotate only in the clockwise direction in FIG. 5 and does not rotate in the counterclockwise direction, which is the counterclockwise direction. As shown in FIG. 5, the polygon piece 406 has a polygonal outer periphery. A groove 407 is formed on each side of the polygon of the polygon piece 406. The polygonal piece 406 press-fitted into the one-way clutch 405 functions as a second rotating member having a large resistance to rotation other than a predetermined direction.

  Reference numeral 408 denotes a pulley 408 that winds the wire 107 and adjusts the tension applied to the wire 107. One end of a wire 107 is coupled to the pulley 408, and the wire 107 can be taken up by the pulley 408 rotating around the support shaft 402 as a rotation axis. The pulley 408 and the polygon piece 406 rotate on the same axis. In the present embodiment, the wire 107 can be wound up when it can be rotated clockwise in FIG. Moreover, when rotating counterclockwise, the wire 107 can be loosened. As described above, the pulley 408 functions as a winding member capable of winding the wire 107.

  Reference numeral 409 denotes a wedge member 409 disposed between the polygonal piece 406 and the pulley 408. A protrusion 410 is formed on the wedge member 409, and the protrusion 410 is fitted in the groove 407. As described above, the wedge member 409 functions as a wedge-shaped engagement member.

  A boss member 411 is coupled to the adjustment dial 401. As shown in FIG. 5, a plurality of boss members 411 are arranged so as to contact the wedge member 409.

  Since the boss member 411 is coupled to the adjustment dial 401, when the wearer rotates the adjustment dial 401, the rotational force is transmitted to the wedge member 409 via the boss member 411.

  Reference numeral 412 denotes an urging member 412 disposed in each of the grooves 407. The urging member 412 is formed of a spring or the like, is in contact with the protrusion 411, and urges the wedge member 409 in the clockwise direction. Next, details of mounting the HMD using the adjustment unit 109 will be described.

  When the wearer wears the HMD, first, the HMD is put on the head, the frame 102 is gripped by the left hand, and the adjustment dial 109 is gripped by the right hand. Then, the forehead is aligned with the forehead pad 105. When the forehead is aligned with the forehead pad 105, the occipital pad 104 and the parietal pad 106 are tightened by rotating the adjustment unit 109 clockwise.

  FIG. 6 is a diagram illustrating the operation of the adjustment unit 109 when performing the winding operation. First, when the wearer rotates the adjustment dial 401 of the adjustment unit 109 clockwise, the boss member 411 coupled to the adjustment dial 401 also rotates clockwise. The boss member 411 contacts the wedge member 409, thereby moving the wedge member 409 in the clockwise direction of the support shaft 402. Since the polygonal piece 406 has a polygonal shape, the gap between the polygonal piece 406 and the pulley 408 is narrow in the vicinity of each vertex of the polygon. Therefore, when the wedge member 409 continues to move, the wedge member 409 enters the narrow gap between the polygon piece 406 and the pulley 408. When the wedge member 409 enters the gap, the adjustment dial 401, the polygonal piece 406, and the pulley 408 are engaged via the wedge member 409. When engaged, the rotation of the adjustment dial 401 is transmitted to the polygonal piece 406 and the pulley 408. Therefore, when the adjustment dial 401 is rotated clockwise, the polygonal piece 406 and the pulley 408 rotate clockwise. . Therefore, when the wearer rotates the adjustment dial 401 clockwise after the engagement, the pulley 408 can wind up the wire 107 and tighten the occipital pad 104 and the parietal pad 106.

  Next, a description will be given after the tightening is completed. After completion of the tightening, the wound wire 107 receives a load from the leaf spring 111 to generate a tension, and the pulley 107 receives the load in the counterclockwise direction. Since the pulley 107 is engaged with the adjustment dial 401 and the polygonal piece 406, a load is applied to the adjustment dial 401 and the polygonal piece 406 in the counterclockwise direction. However, since the polygonal piece 406 is press-fitted into the one-way clutch 405 that rotates only in the clockwise direction, it does not rotate counterclockwise. Therefore, the adjustment dial 401 and the pulley 107 engaged with the polygonal piece 406 do not rotate counterclockwise. Therefore, even if the wearer releases his hand from the adjustment dial 401 after the tightening is completed, the tightening of the occipital pad 104 and the parietal pad 106 can be maintained. As described above, the wearer can perform desired tightening of the HMD and maintain it.

  Next, the operation for releasing the tightening will be described. When releasing the tightening, the wearer rotates the adjustment dial 401 in the counterclockwise direction. When the adjustment dial 401 rotates counterclockwise, the boss member 411 coupled to the adjustment dial 401 also rotates counterclockwise. When the boss member 411 contacts the wedge member 409, a load is applied to the wedge member 409 in a counterclockwise direction. When the load from the boss member 411 exceeds the frictional force between the polygonal piece 406 and the pulley 408 and the wedge member 409, the wedge member 409 comes out of the gap between the polygonal piece 406 and the pulley 408. When the wedge member 409 comes out, the adjustment dial 401, the polygonal piece 406, and the pulley 408 are disengaged. When the engagement is released, the pulley 408 can rotate counterclockwise. The wound wire 107 receives a load from the leaf spring 111 to generate a tension. After the engagement is released, the pulley 408 rotates counterclockwise, and the winding of the wire 107 is loosened. When the wearer further rotates the adjustment dial 401 counterclockwise after the engagement is released by a predetermined amount or more, the wedge member 409 enters the narrow gap between the polygonal piece 406 and the pulley 408, Abuts on pulley 408.

  FIG. 7 is a view showing a state in which the wedge member 409 is in contact with the pulley 408. When the wedge member 409 and the pulley 408 come into contact with each other, a frictional force is exerted, and a sudden counterclockwise rotation of the pulley 408 due to a load from the leaf spring 111 is suppressed, and the tightening by the wire 107 can be safely released. I can do it. However, if the wedge member 409 is brought into contact with the pulley 408 rotating counterclockwise, the wedge member 409 may enter deeply into the gap between the pulley 408 and the polygonal piece 406, and so-called biting may occur. is there. When biting occurs, it becomes difficult to let the wedge member 409 come out of the gap between the pulley 408 and the polygonal piece 406. In order to prevent such biting, it is desirable to dispose a rib or the like in the groove 407.

  As described above, according to the adjustment unit 109 of the present embodiment, it is possible to suppress the rotation of the pulley 408 at the time of winding the wire 107 with a simple configuration, maintaining, releasing, and releasing the winding at a free position. .

  For the wearer, the wire 107 can be wound up by rotating the adjustment unit 109 clockwise. If the hand is released from the adjusting unit 109 at a desired position after winding, the winding state can be maintained. When it is desired to cancel the winding, the winding of the wire 107 can be canceled by rotating the adjusting unit 109 counterclockwise. The wearer can control the winding of the wire 107 by the intuitive operation as described above.

  In the present embodiment, the occipital pad 104 and the parietal pad 106 are tightened using the wire 107. However, a belt-like member such as a spring spring may be used as an alternative member, and a flexible member can be substituted.

  In the present embodiment, the polygonal piece 406 and the wedge member 409 having a polygonal shape are used for the adjustment unit 109. However, it is possible to configure the present embodiment using other shape members.

  FIG. 8 shows an FF cross section when an alternative member is used. In FIG. 8, a star-shaped member 801 is used as an alternative member of the polygon piece 406. A ball member 802 is used as a substitute for the wedge member 409. The biasing member 412 is formed of a leaf spring or the like, and biases the ball member 802 in the clockwise direction. As in the case of FIG. 7, when the ball member 802 moves, the ball member 802 enters the gap between the star-shaped member 801 and the pulley 408, so that the same operation as in FIG. 7 can be performed.

(Second embodiment)
In the first embodiment, the adjustment unit 109 is used to tighten the occipital pad 104 and the parietal pad 106 of the HMD. However, the adjusting unit 109 can be used in addition to the HMD.

  In the present embodiment, a case where the adjusting unit 109 is used as a ski boot fastening mechanism will be described.

  FIG. 9 is a perspective view of the ski boot provided with the adjusting portion 109.

  FIG. 10 is a side view of the ski boot provided with the adjusting portion 109.

  Hereinafter, the case where the adjustment part 109 is arrange | positioned to a ski boot is demonstrated using FIG. 9 and FIG.

  Reference numeral 901 denotes a shell 901 that covers the feet of the ski boot wearer. The shell 901 includes a toe portion 902, a heel portion 903, an ankle portion 904, an upper portion 905, and a foot insertion port 906. The shell 901 is desirably a material that is robust and resilient.

  A flapper 907 covers the ankle portion 904 and the upper portion 905. The flapper 907 is shaped to surround the upper portion 905 while opening with respect to the front of the wearer's foot, and is fastened to the shell 901 in the vicinity of the Achilles tendon portion by means such as adhesion or welding.

  The flapper 907 is provided with a plurality of hooks 908 at a portion that is open to the front of the wearer's foot. The hooks 908 are arranged on the left and right sides of the open portion.

  Reference numeral 909 denotes a wire 909 for fastening the flapper 907. The wire 909 is knitted so that the hooks 908 are folded back and forth alternately. The hook 908 has a hole through which the wire 909 passes so that the wire 909 cannot be detached from the hook 908.

  The tongue portion 910 is a member for adjusting the width of the foot insertion port 906. It extends rearward from the toe portion 902 to the ankle portion 904 of the ski boot, and is disposed inside the boot with respect to the flapper 907. One end of the tongue-shaped portion 910 is fastened to the shell 901 near the toe portion 902 by means such as welding or adhesion, but the other end is free. Therefore, the opening area at the foot insertion port 906 can be adapted to the size of the wearer's foot. Moreover, since the inner surface side of the tongue-shaped part 910 becomes a direct contact part with a leg | foot, it is desirable to comprise with a flexible material.

  Reference numeral 911 denotes an adjustment unit 911 for controlling the winding of the wire 909, and the structure is the same as that of the adjustment unit 109 in the first embodiment. By rotating, the winding of the wire 909 can be controlled. Hereinafter, the internal structure of the adjustment unit 911 is the same as the tables in FIGS. 4 and 5.

  The operation and action when the ski boot is mounted with the above configuration will be described. First, when the wire 909 is loosened, the tongue 910 is widened to widen the opening area of the foot insertion port 906 of the shell 901 so that the wearer's foot can be inserted. Insert into 901. From the inserted state, the tongue portion 910 is stored so as to be inside the flapper 103. In this state, the adjustment dial 401 of the adjustment unit 903 is rotated in the CW direction in FIG. 9 and the wire 909 is wound up. By winding the wire 909, the flapper 907 is tightened and deformed to a shape that matches the foot shape of the wearer, and the wearer's ankle is fixed.

  Next, a case where a wearer removes ski boots will be described. The wearer rotates the adjustment dial 401 of the adjustment unit 911 in the CCW direction. At this time, the engagement of the wedge member 409, the pulley 408, and the polygonal piece 406 inside the adjusting portion 911 is released, and the pulley 408 winding the wire 909 becomes freely rotatable. At this time, the flapper 907 and the tongue 910 wound by the wire 909 are released from the deformed state, return to the initial shape, and the pulley 408 rotates until the linear tension of the wire 909 becomes almost zero. Thereafter, the ski boot can be removed by pushing the tongue 910 outward of the shell 901.

  According to the present embodiment, the wire can be wound and locked at a free position with a simple configuration, the rotation can be suppressed during release and release, and a light and reliable operation can be realized. Therefore, it is possible to realize ski boots that contribute to cost reduction.

It is a figure which shows the external appearance of the head mounted display (HMD) in this embodiment. It is the figure which showed HMD of FIG. 1 from the head top part direction of the wearer. It is the figure which showed HMD of FIG. 1 from the wearer's temporal direction. It is the figure which showed the structure of the adjustment part 109 on the CC cross section of FIG. It is the figure which showed the structure of the adjustment part 109 on the FF cross section of FIG. It is the figure which showed operation | movement of the adjustment part 109 when performing winding operation | movement. It is a figure which shows the state which the wedge member 409 is contact | abutting with the pulley 408. FIG. The FF cross section at the time of using an alternative member is shown. FIG. 5 is a perspective view of a ski boot provided with an adjustment unit 109. FIG. 3 is a side view of a ski boot provided with an adjustment unit 109.

Claims (10)

A winding member capable of winding the flexible member by rotating;
A rotatable first rotating member;
A second rotating member that is rotatable coaxially with the winding member, and whose resistance to rotation in a predetermined direction is smaller than the resistance to rotation in a direction opposite to the predetermined direction;
An engagement member for engaging the winding member and the second rotating member;
The engaging member is
If the first rotary member is subjected to a rotational force to the predetermined rotational direction, the winding member and the front Symbol engaged and a second rotary member, the winding with rotation of said first rotary member When the member is rotatable in the predetermined direction and the first rotating member receives a rotational force in a rotation direction opposite to the predetermined rotation direction, the engagement is released, and the winding member is moved in the predetermined direction. a winding device comprising a rotatable be benzalkonium the opposite direction.   The winding device according to claim 1, wherein the engaging member is located between the winding member and the second rotating member. When the rotation by the rotation power of the opposite direction is larger than a predetermined amount, said engaging member, said the to a front Kimaki preparative member and the first rotating member engaged with said second rotary member The winding device according to claim 1 or 2.   The winding device according to any one of claims 1 to 3, wherein the engaging member has a wedge shape.   The winding device according to any one of claims 1 to 3, wherein the first rotating member has a cylindrical shape. The engaging member is coupled to the first rotating member;
The shape of the outer periphery of the second rotating member is a polygon, and the engaging member is rotated with the second rotating member in the vicinity of the apex of the polygon and the winding along with the rotation of the first rotating member. The winding according to any one of claims 1 to 5, wherein the winding member, the first rotating member, and the second rotating member are engaged with each other by entering a gap between the winding member and the winding member. Taking device. The winding member is biased in the direction of loosening the winding of the flexible member,
The winding device according to any one of claims 1 to 6, wherein when the engagement by the engaging member is released, the winding of the flexible member is loosened.   The winding member engaged with the second rotating member rotates in the direction opposite to the predetermined direction by increasing the resistance of rotation in the direction opposite to the predetermined direction. The winding device according to any one of claims 1 to 7, wherein the winding device is prevented. The flexible member is a wire member for tightening a head-mounted mounting member,
The winding device according to any one of claims 1 to 8, wherein the mounting member is tightened or released by the rotation of the first rotating member. A head-mounted display device comprising the winding device according to any one of claims 1 to 9.

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