Head-mounted display

1 . A head-mounted display, comprising:

a housing, an inside of the housing having a receiving space penetrating through a rear of the housing;

a bracket disposed in the receiving space;

a first sliding plate slidably disposed to one side of the bracket, the first sliding plate having a first rack extended sideward from one side of the first sliding plate, several portions of a surface of the first sliding plate being recessed inward to form a plurality of limiting grooves abreast arranged transversely;

a first display unit mounted on the first sliding plate, and the first display unit moving together with the first sliding plate;

a second sliding plate slidably disposed to the other side of the bracket, and the second sliding plate being located to one side of the first sliding plate, the second sliding plate having a second rack extended sideward and towards the first sliding plate from one side of the second sliding plate, the first rack and the second rack being parallel to each other;

a second display unit mounted on the second sliding plate, and the second display unit moving together with the second sliding plate;

an adjustment gear rotatably disposed at the bracket, and the adjustment gear being connected between the first sliding plate and the second sliding plate, the first rack and the second rack being both engaged with the adjustment gear; and

a limiting elasticity piece mounted to an inner surface of the housing, the plurality of the limiting grooves facing the limiting elasticity piece, a middle of the limiting elasticity piece being arched towards the first sliding plate to form a limiting block, and the limiting block being buckled in one of the plurality of the limiting grooves.

2 . The head-mounted display as claimed in claim 1 , wherein the limiting elasticity piece includes an elastic cantilever and a pair of fixing legs, two outer sides of the elastic cantilever are perpendicularly bent towards the inner surface of the housing and then extend outward to form the pair of the fixing legs, the pair of the fixing legs are combined with the inner surface of the housing to hang the elastic cantilever beside the inner surface of the housing, a middle of the elastic cantilever is bulged away from the inner surface of the housing to form the limiting block.

3 . The head-mounted display as claimed in claim 2 , wherein two portions of the inner surface of the housing extend inward to form a pair of fixing parts, the limiting elasticity piece includes a pair of fixing holes longitudinally penetrating through the pair of the fixing legs, respectively, the pair of the fixing parts pass through the pair of the fixing holes, and the pair of the fixing legs are combined with the pair of the fixing parts.

4 . The head-mounted display as claimed in claim 3 , wherein the inner surface of the housing extends inward to form a rib, two inner surfaces of two opposite sides of the rib extend inward to form the pair of the fixing parts.

5 . The head-mounted display as claimed in claim 1 , wherein a front surface of the first sliding plate extends frontward to form a limiting part, the limiting elasticity piece is aligned with the limiting part, several portions of a front surface of the limiting part are recessed inward to form the plurality of the limiting grooves arranged side by side.

6 . The head-mounted display as claimed in claim 5 , wherein a top wall of the housing defines an adjusting groove penetrating through the top wall of the housing along an up-down direction, a top of the first sliding plate extends towards the adjusting groove to form an extension plate, a top end of the extension plate extends upward and expands outward to form a sliding portion, a width of the sliding portion is greater than a width of the adjusting groove, the sliding portion is positioned outside the adjusting groove, the limiting part is extended frontward from a front surface of the extension plate.

7 . The head-mounted display as claimed in claim 1 , wherein the bracket includes a gear seat and a locking element, the gear seat is located between the first sliding plate and the second sliding plate, a rear surface of the bracket protrudes outward to form the gear seat, the gear seat is a hollow shaft structure, a center of the adjustment gear has a through hole longitudinally penetrating through the adjustment gear, the gear seat passes through the through hole, the locking element passes through the through hole, and the locking element is locked into the gear seat.

8 . The head-mounted display as claimed in claim 1 , wherein an inner wall of the first sliding plate extends sideward and towards the second sliding plate to form a first adjustment belt, a bottom of the first adjustment belt protrudes downward to form the first rack, an inner wall of the second sliding plate extends sideward and towards the first sliding plate to form a second adjustment belt, a top of the second adjustment belt protrudes upward to form the second rack.

9 . The head-mounted display as claimed in claim 1 , wherein the bracket includes two parallel slide rails and a plurality of slide rail seats, the plurality of the slide rail seats are protruded outwardly from a rear surface of the bracket, the plurality of the slide rail seats are formed as semi-cylindrical structures, insides of the plurality of the slide rail seats define a plurality of penetrating holes, the two slide rails are fastened to the plurality of the slide rail seats, the two slide rails pass through the penetrating holes of the plurality of the slide rail seats.

10 . The head-mounted display as claimed in claim 9 , wherein several portions of a front surface of the first sliding plate protrude frontward to form a plurality of first pivoting parts, and several portions of a front surface of the second sliding plate protrude frontward to form a plurality of second pivoting parts, each first pivoting part and each second pivoting part are designed as arcuation structures, insides of the plurality of the first pivoting parts and the second pivoting parts define a plurality of perforations transversely penetrating through the plurality of the first pivoting parts and the second pivoting parts, so that the plurality of the first pivoting parts and the second pivoting parts are mounted around the two slide rails.

11 . The head-mounted display as claimed in claim 1 , wherein the housing includes a casing, and a cover combined with the casing, the cover has a pair of accommodating holes, two inner surfaces of two side walls of the cover protrude inward to form two baffles, respectively, a lower portion of a rear surface of the first sliding plate extends rearward and then extends upward to form a first base, a lower portion of a rear surface of the second sliding plate extends rearward and then extends upward to form a second base, the first display unit is installed in the first base, the second display unit is installed in the second base, the first display unit and the second display unit are accommodated in the pair of the accommodating holes, the first base and the second base are positioned between the two baffles.

12 . The head-mounted display as claimed in claim 11 , wherein the first sliding plate has a first covering plate, the first covering plate is covered to an outer surface of the first base, the second sliding plate has a second covering plate, the second covering plate is covered to an outer surface of the second base.

13 . A head-mounted display, comprising:

a housing having a receiving space;

a bracket disposed in the receiving space;

a first sliding plate slidably disposed to one side of the bracket, the first sliding plate having a first rack;

a first display unit mounted to the first sliding plate, and the first display unit moving together with the first sliding plate;

a second sliding plate slidably disposed to the other side of the bracket, the second sliding plate having a second rack, the first rack and the second rack being parallel to each other;

a second display unit mounted to the second sliding plate, and the second display unit moving together with the second sliding plate; and

an adjustment gear rotatably disposed at the bracket, and the adjustment gear being connected between the first rack and the second rack;

wherein a plurality of limiting grooves are formed on one of the first sliding plate and the second sliding plate;

wherein a limiting elasticity piece is mounted to the housing, the plurality of the limiting grooves face the limiting elasticity piece, the limiting elasticity piece has a limiting block, and the limiting block is buckled in one of the plurality of the limiting grooves; and

wherein the adjustment gear rotates to drive the first rack and the second rack to move closer to each other or break away from each other, so that the first sliding plate and the second sliding plate move closer to each other or break away from each other.

14 . A head-mounted display, comprising:

a housing having a receiving space, a top wall of the housing defining an adjusting groove, the receiving space being communicated with the adjusting groove;

a bracket disposed in the receiving space;

a first sliding plate slidably disposed to one side of the bracket, the first sliding plate having a first rack;

a first display unit mounted on the first sliding plate, and the first display unit moving together with the first sliding plate;

a second sliding plate slidably disposed to the other side of the bracket, the second sliding plate having a second rack, the first rack and the second rack being parallel to each other;

a second display unit mounted on the second sliding plate, and the second display unit moving together with the second sliding plate; and

an adjustment gear rotatably disposed at the bracket, and the adjustment gear being connected between the first rack and the second rack;

wherein an adjusting lever is extended from one of the first sliding plate and the second sliding plate, and the adjusting lever passes through the adjusting groove, and the adjusting lever is exposed to a top surface of the housing;

wherein a fixation structure is positioned between the housing and one of the first sliding plate and the second sliding plate; and

wherein the fixation structure has a plurality of limiting grooves and a limiting elasticity piece, the plurality of the limiting grooves face the limiting elasticity piece, the limiting elasticity piece has a limiting block, and the limiting block is buckled in one of the plurality of the limiting grooves.