CN211403072U - Laser projection apparatus and light conversion mechanism - Google Patents

Abstract

The utility model provides a laser projection equipment and light conversion mechanism, wherein, the utility model provides a light conversion mechanism, at least part through the keysets first end with the fluorescence wheel subassembly closely laminates with metal casing's inside wall, compare in current light conversion mechanism, area of contact between keysets and the metal casing has been increased, make the heat of fluorescence wheel subassembly transmit to metal casing fast on, and then through the metal casing with the external air contact with the heat effluvium, the radiating efficiency to the fluorescence wheel subassembly has effectively been promoted, make the temperature greatly reduced of the keysets of fluorescence wheel subassembly, thereby not only prolonged the life of fluorescence wheel subassembly, the noise of fluorescence wheel subassembly has also been reduced.

Description

Laser projection apparatus and light conversion mechanism

Technical Field

The utility model relates to a laser projection equipment and light conversion mechanism belongs to optics technical field.

Background

The laser projection display technology (LDT), also called laser projection technology or laser display technology, is a display technology which takes red, green and blue (RGB) tricolor laser as a light source, and has a color gamut coverage rate which can reach more than 90% of the color space which can be identified by human eyes and is more than twice of the coverage rate of the traditional display color gamut, thereby being capable of reproducing the rich and beautiful colors of the objective world most truly and providing more shocking expressive force.

For technical reasons, most of the existing laser projection devices generate RGB three-primary-color laser light by using a monochromatic semiconductor laser and a light conversion mechanism. The light conversion mechanism comprises a shell and a fluorescent wheel assembly, wherein the fluorescent wheel assembly is fixed on a bottom plate of the shell through a mounting bracket, and part of the fluorescent wheel assembly extends out of the shell from an opening arranged on the bottom plate so as to be matched with the single semiconductor laser to realize the purpose of converting monochromatic laser emitted by the single semiconductor laser into RGB three-primary-color laser.

However, since the fluorescent wheel of the fluorescent wheel assembly needs to rotate at a high speed and monochromatic laser light with high energy emitted by the monochromatic semiconductor laser device is intensively irradiated on the fluorescent wheel assembly, the temperature of the fluorescent wheel assembly is high, the heat dissipation efficiency of the existing light conversion mechanism is poor, and the heat of the fluorescent wheel assembly cannot be dissipated in time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a laser projection equipment and light conversion mechanism to the radiating efficiency that laser projection equipment's light conversion mechanism exists is not good or other potential problems among the prior art is solved to the part at least.

A first aspect of the present invention provides a light conversion mechanism, including: a metal housing and a fluorescent wheel assembly;

the metal shell comprises a bottom wall, a top wall and a first side wall positioned between the bottom wall and the top wall, and the bottom wall is provided with an opening;

the fluorescent wheel assembly comprises: the fluorescent wheel is rotatably arranged at the second end of the adapter plate, and a part of the fluorescent wheel penetrates through the opening and extends out of the metal shell.

Optionally, the metal shell further includes a second side wall opposite to the first side wall, the second side wall is provided with a mounting opening, and a heat dissipation cover plate covers the mounting opening;

the inner surface of the heat dissipation cover plate is provided with at least one protrusion, and/or the outer surface of the heat dissipation cover plate is provided with at least one heat dissipation rib.

Optionally, the mounting port is provided with a sealing boot for sealing the metal housing and the cover plate.

Optionally, a plurality of heat dissipation ribs are arranged on the outer surface of the metal shell along the flow direction of the cooling air.

Optionally, the light conversion mechanism is further provided with a heat sink in heat-conducting contact with the first side wall of the metal housing through heat-conducting silicone grease.

Optionally, a step hole is formed in the first side wall of the metal shell, and the adapter plate is provided with a first threaded hole coaxial with the step hole; the first side wall and the adapter plate are fixedly connected through bolts penetrating through the step holes and the first threaded holes, and the heads of the bolts abut against the step surfaces of the step holes.

Optionally, an adhesive layer is disposed between the head of the bolt and the first sidewall.

Optionally, a sealing sleeve for sealing the metal shell and the bolt is arranged in the stepped hole.

Optionally, the light conversion mechanism further comprises a sensor and a mounting bracket;

the first side wall of the metal shell is provided with an integrated mounting platform, and the mounting platform is provided with a first positioning column and a second threaded hole;

the mounting bracket is provided with a first positioning hole matched with the first positioning column and a through hole matched with the second threaded hole, and the mounting bracket is fixedly connected to the mounting platform through bolts penetrating through the through hole and the second threaded hole;

the sensor is fixed on the mounting bracket.

Optionally, a preset opening is formed in the top wall of the metal shell, a wire passing cover plate is covered at the preset opening, and a wire passing hole for allowing a connecting wire electrically connected with the sensor to pass through is formed in the wire passing cover plate;

and a sealing sleeve for sealing the metal shell and the wire passing cover plate is arranged on the inner wall of the preset opening.

Optionally, the surface of the mounting bracket is provided with a matte black coating.

The utility model discloses a light conversion mechanism that first aspect provided, at least part through the keysets first end with the fluorescence wheel subassembly closely laminates with metal casing's inside wall, compare in current light conversion mechanism, area of contact between keysets and the metal casing has been increased, make the heat of fluorescence wheel subassembly can transmit to metal casing fast on, and then through the metal casing with the outside air contact with the heat effluvium, the radiating efficiency to the fluorescence wheel subassembly has effectively been promoted, make the temperature greatly reduced of the keysets of fluorescence wheel subassembly, thereby not only prolonged the life of fluorescence wheel subassembly, the noise of fluorescence wheel subassembly has also been reduced. In addition, the adapter plate of the fluorescent wheel assembly is directly fastened and connected with the first side wall of the metal shell, and compared with the prior art that the adapter plate is connected with the first side wall of the metal shell through a support, the vibration amplitude of the fluorescent wheel assembly in the rotating process is effectively reduced, so that the noise generated by the fluorescent wheel assembly in the working process is reduced, meanwhile, the assembling efficiency between the fluorescent wheel assembly and the metal shell is also improved, the position of the fluorescent wheel assembly in the metal shell is convenient to control, and the position of the fluorescent wheel in the laser generating mechanism is ensured.

Another aspect of the present invention is to provide a laser projection apparatus, including: the laser light generating mechanism comprises a laser light generating mechanism and the light conversion mechanism, wherein the light conversion mechanism is overlapped with the laser light generating mechanism, a fluorescent wheel of the light conversion mechanism extends into the laser light generating mechanism, and laser light generated by the laser light generating mechanism vertically penetrates through a part of the fluorescent wheel extending into the laser light generating mechanism.

Optionally, a shock absorbing pad is arranged between the laser generating mechanism and the light conversion mechanism.

The utility model provides a laser projection equipment through the above-mentioned light conversion structure of superpose on laser emergence mechanism, has promoted light conversion structure's radiating efficiency effectively to ensure that the fluorescence wheel in the light conversion structure changes the monochromatic laser that the mechanism produced to laser emergence mechanism effectively to RGB three primary colors laser, prolonged laser projection equipment's life, reduced the noise that laser projection equipment produced in operation process moreover.

Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and other objects, features and advantages of the embodiments of the present invention will become more readily understood from the following detailed description with reference to the accompanying drawings. Embodiments of the invention will be described, by way of example and not by way of limitation, in the accompanying drawings, in which:

fig. 1 is a schematic diagram of an internal structure of a laser projection apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a partial cross-sectional view of FIG. 1;

FIG. 4 is a partial schematic view of the first view of FIG. 3;

FIG. 5 is an enlarged view of a portion of FIG. 4 at I;

FIG. 6 is an enlarged view of a portion of FIG. 4 at II;

FIG. 7 is a schematic diagram of the internal structure of the metal shell of FIG. 2 from a first perspective;

FIG. 8 is a bottom view of FIG. 3;

FIG. 9 is a schematic structural diagram of the heat-dissipating cover plate of FIG. 2;

FIG. 10 is a right side view of FIG. 9;

FIG. 11 is a left side view of FIG. 9;

FIG. 12 is a top view of FIG. 3;

FIG. 13 is an internal structural view of the metal shell of FIG. 2 from a second perspective;

fig. 14 is a partial structural schematic diagram of the second viewing angle of fig. 3.

Description of reference numerals:

100-a light conversion mechanism;

110-a metal housing;

111-a bottom wall;

1111-opening;

1112-a second positioning hole;

112-a top wall;

1121-presetting a port;

113-a first side wall;

1131-mounting surface;

1132 — a stepped bore;

1133-step surface;

1134, mounting holes;

1135, mounting a platform;

1136 — first positioning column;

114-a second side wall;

1141-a mounting port;

115-bolt;

116-a sealing sleeve;

117-thermally conductive silicone grease;

118-a wire-passing cover plate;

1181-wire passing holes;

120-a fluorescent wheel assembly;

121-an interposer;

122-a fluorescent wheel;

123-a motor;

130-a heat dissipation cover plate;

131-protrusions;

132-a third threaded hole;

133-a spacing post;

140-heat dissipation ribs;

150-a heat sink;

160-a sensor;

170-mounting a bracket;

171-a through hole;

180-a socket;

200-a laser generating mechanism;

210-a lens;

220-a fixed plate;

300-connecting lines;

400-power panel;

500-shock pad.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 is a schematic diagram of an internal structure of a laser projection apparatus provided in this embodiment; FIG. 2 is an exploded view of FIG. 1; FIG. 3 is a partial cross-sectional view of FIG. 1; FIG. 4 is a partial schematic view of the first view of FIG. 3; FIG. 5 is an enlarged view of a portion of FIG. 4 at I; FIG. 6 is an enlarged view of a portion of FIG. 4 at II; fig. 7 is a schematic view of the internal structure of the metal shell in fig. 2 from a first perspective, and fig. 8 is a bottom view of fig. 3. Referring to fig. 1 to 8, the present embodiment provides a light conversion mechanism 100 including a metal housing 110 and a fluorescent wheel assembly 120.

Specifically, the metal case 110 includes a bottom wall 111, a top wall 112, and a first side wall 113 between the bottom wall 111 and the top wall 112, the bottom wall 111 being provided with an opening 1111, as shown in fig. 8. The fluorescent wheel assembly 120 of the present embodiment includes an adaptor plate 121 and a fluorescent wheel 122. Wherein, the first end of the adapter plate 121 at least partially abuts against the inner surface of the first sidewall 112, and the adapter plate 121 is tightly connected with the first sidewall 113, the fluorescent wheel 122 is rotatably mounted at the second end of the adapter plate 121, and a part of the fluorescent wheel 122 protrudes out of the metal shell 110 through the opening 1111 to protrude into the lens 210 of the laser generating mechanism 200 mentioned below.

Referring to fig. 8, a second positioning hole 1112 is disposed on the bottom wall 111 of the metal housing 110, a second positioning column (not shown) matched with the second positioning hole 1112 is disposed on the bearing plate 220 of the laser generating mechanism 200, and the distance between the fluorescent wheel 122 and the lens 210 in the metal housing 110 is ensured by high-precision matching between the second positioning hole 1112 and the second positioning column.

In practice, the fluorescent wheel assembly 120 further comprises a motor 123, and the second end of the adapter plate 121 is rotatably connected to the fluorescent wheel 122 via the motor 123. Specifically, the rotating plate is sleeved on the output shaft of the motor 123 and is rotatably connected to the motor 123, so that the rotating plate 121 is not driven to rotate when the motor 123 rotates, for example, the rotating plate 121 and the motor 123 may be connected through a bearing. One end of the motor 123 is fixed to the fluorescent wheel 122 to drive the fluorescent wheel 122 to rotate. The first end of the adapter plate 121 is fixed to the metal housing 110 to fix the motor 123 and the fluorescent wheel 122.

Referring to fig. 4 to 7, in this embodiment, when the interposer 121 is assembled with the metal housing 110, the first end of the interposer 121 is attached to the inner surface of the first sidewall 113 of the metal housing 110, which increases the contact area between the interposer 121 and the metal housing 110 compared with the conventional optical conversion mechanism, so that the heat of the fluorescent wheel assembly 120 can be rapidly transferred to the metal housing 110, and then the metal housing 110 contacting with the outside air dissipates the heat, thereby effectively improving the heat dissipation efficiency of the fluorescent wheel assembly 120, greatly reducing the temperature of the interposer 121 of the fluorescent wheel assembly 120, and prolonging the service life of the fluorescent wheel assembly 120. Especially for the small-sized fluorescent wheel 122, since the area of the outer surface of the fluorescent wheel 122 is small, the heat radiated outwards is small, and therefore, by attaching the adapter plate 121 of the fluorescent wheel assembly 120 to the first side wall 113 of the metal housing 110, the heat generated by the small-sized fluorescent wheel 122 during the rotation process can be quickly and effectively transferred to the metal housing 110 through the adapter plate 121, thereby improving the heat dissipation efficiency of the small-sized fluorescent wheel 122.

It is verified that the structural arrangement of the present embodiment enables the temperature of the motor 123 to be reduced by about 20 °, thereby ensuring that the motor 123 can work normally.

In practical applications, the higher the temperature of the fluorescent wheel assembly 120 is, the higher the noise generated during the rotation process thereof is, so that by bringing at least part of the adapter plate 121 of the fluorescent wheel assembly 120 into close contact with the inner surface of the metal shell 110, the heat on the adapter plate 121 is directly transferred to the metal shell 110, thereby effectively reducing the temperature of the fluorescent wheel assembly 120 and further reducing the noise of the fluorescent wheel assembly.

Referring to fig. 4 to 7, when the fluorescent wheel assembly 120 is specifically assembled, one end of the motor 123 far away from the fluorescent wheel 122 may be inserted into the mounting hole 1134 formed in the first sidewall 113, and the first end of the adapter plate 121 is tightly attached to the inner surface of the first sidewall 113, so as to quickly transfer heat generated by the motor 123 during high-speed operation to the metal housing 110, and further to the outside through the outer surface of the metal housing 110, and at the same time, one end of the motor 123 far away from the fluorescent wheel 122 is inserted into the mounting hole 1134 of the first sidewall 113, so as to perform bearing and positioning functions on one end of the motor 123 far away from the fluorescent wheel 122, thereby preventing the motor 123 from shifting up and down during high-speed rotation, and ensuring that the first end of the adapter plate 121 can be stably attached to the inner surface of the first sidewall 113.

Referring to fig. 7, in order to facilitate the first end of the interposer 121 directly contacting with the inner surface of the first sidewall 113, in this embodiment, a mounting surface 1131 matching with the end surface shape of the first end of the interposer 121 is disposed on the first sidewall 113, and the mounting surface 1131 may be a concave portion formed on the first sidewall 113 or a convex portion formed on the first sidewall 113. The first end of the adapter plate 121 is assembled on the mounting surface 1131 of the first sidewall 113, so that the first end of the adapter plate 121 can be tightly attached to the first sidewall 113, and the adapter plate 121 can be conveniently positioned, thereby improving the assembly efficiency between the fluorescent wheel assembly 120 and the metal housing 110.

In practical applications, the inner surface of the metal shell 110 is machined, so as to ensure the flatness and surface roughness of the inner surface, thereby further facilitating the control of the shape of the mounting surface 1131 of the first sidewall 113 to be matched with the first end of the interposer 121, and further ensuring that the mounting surface 1131 is tightly attached to the end surface of the interposer 121. Thereby ensuring that the part of the fluorescent wheel 122 connected with the adapter plate 121, which extends into the laser generating mechanism 200, is perpendicular to the optical axis of the lens 210, and ensuring that the optical axis is located at the middle position of the effective area of the wheel body. When light source light is incident on the wheel body of the fluorescent wheel 122, the light source light can be vertical and light spots are just shot at the center of the effective area of the wheel body, so that the acting efficiency of the wheel body is effectively improved.

Because the heat conduction effect of metal material itself is better, consequently, this metal casing 110 can transmit the heat of keysets 121 to metal casing 110's surface fast, and then from the surface transmission to the external world to further guaranteed that the heat on the keysets 121 can be fast transmitted to the exterior space, avoid the heat to be detained in metal casing 110 and even reverse lead to keysets 121 on and influence the radiating effect of fluorescence wheel subassembly 120.

Referring to fig. 4, compared with the prior art that the adapter plate 121 is mounted on the metal housing 110 through the mounting bracket, the adapter plate 121 of the embodiment is directly fastened to the first sidewall 113, so that the adapter plate 121 and the metal housing 110 form a whole, vibration and swing amplitude of the fluorescent wheel assembly 120 during operation are effectively reduced, rotation of the fluorescent wheel assembly 120 is more stable, and noise generated by vibration of the fluorescent wheel assembly 120 is reduced. In addition, the assembly efficiency between the fluorescent wheel assembly 120 and the metal housing 110 is also improved, and the position of the fluorescent wheel assembly 120 in the metal housing 110 is easily controlled, thereby ensuring the position of the fluorescent wheel 122 in the laser generating mechanism 200.

FIG. 9 is a schematic structural diagram of the heat-dissipating cover plate of FIG. 2; FIG. 10 is a right side view of FIG. 9; FIG. 11 is a left side view of FIG. 9; fig. 12 is a top view of fig. 3. Referring to fig. 2, 9 to 12, the metal housing 110 of the present embodiment includes a second side wall 114 disposed opposite to the first side wall 113, the second side wall 114 is provided with an installation opening 1141 to facilitate installation of the fluorescent wheel assembly 120 in the inner cavity of the metal housing 110, and the installation opening 1141 is covered with a heat dissipation cover plate 130 to close the installation opening 1141, so as to prevent external dust from entering the metal housing 100 and damaging the fluorescent wheel assembly 120 and other components, or reduce noise transmitted to the outside by the fluorescent wheel assembly 120 during operation.

Referring to fig. 3, since the heat-dissipating cover 130 is closer to the fluorescent wheel 122 of the fluorescent wheel assembly 120, heat on the fluorescent wheel 133 may be radiated to the heat-dissipating cover 130, and then transferred to the outside through the heat-dissipating cover 130. The heat-dissipating cover 130 may be made of metal or other material with good heat-conducting property, so as to improve the heat-conducting efficiency.

Referring to fig. 9 and 11, in order to improve the heat dissipation efficiency, the inner surface of the heat dissipation cover 130 of the present embodiment is provided with protrusions 131, which increase the area of the inner surface of the heat dissipation cover 130, so that the heat radiated from the fluorescent wheel 122 can be received to a greater extent, thereby improving the heat dissipation efficiency of the heat dissipation cover 130 to the fluorescent wheel assembly 120. In addition, the distance between the heat-dissipating cover 130 and the fluorescent wheel 122 is further shortened by the protrusion 131, so that the heat of the fluorescent wheel 122 can be further ensured to be rapidly radiated to the heat-dissipating cover 130.

In this embodiment, the inner surface of the heat-dissipating cover plate 130 may be provided with a protrusion 131, or the inner surface of the heat-dissipating cover plate 130 may be provided with a plurality of point-array protrusions 131, so as to further increase the area of the inner surface of the heat-dissipating cover plate 130, thereby improving the heat-dissipating efficiency of the fluorescent wheel 122.

In addition, the heat dissipating ribs 140 may be disposed on the outer surface of the heat dissipating cover 130 to increase the heat dissipating area of the outer surface of the heat dissipating cover 130, so that the heat on the heat dissipating cover 130 can be dissipated to the outside air quickly. It can be understood that the number of the heat dissipation ribs 140 may also be 1, or may be multiple, and when the number of the heat dissipation ribs 140 is multiple, the plurality of heat dissipation ribs 140 may be arranged side by side at intervals along the length direction or the width direction of the heat dissipation cover plate 130.

Referring to fig. 12, the extending direction of the heat dissipating ribs 140 may be the same as the direction of the internal wind flow of the light conversion mechanism, so as to blow the heat on the heat dissipating ribs 140 to the outside of the whole machine by the wind flow while increasing the heat dissipating area of the heat dissipating cover plate 130. In fig. 1, 2 and 12, arrow a indicates the direction of the wind flow in the light conversion mechanism.

When the heat dissipating cover 130 of the present embodiment is assembled with the second side wall 114, a third threaded hole 132 may be formed in the heat dissipating cover 130, and a fourth threaded hole coaxial with the third threaded hole 132 may be formed in the second side wall 114 of the metal shell 100, and the heat dissipating cover 130 is connected to the second side wall 114 through a bolt passing through the third threaded hole 132 and the fourth threaded hole. In order to facilitate the alignment of the third threaded hole 132 and the fourth threaded hole, in this embodiment, a limiting post 133 may be disposed on the heat-dissipating cover 130, and a limiting hole matched with the limiting post 133 is formed on the second sidewall 114. During the assembly, insert the spacing post 133 on the second lateral wall 114 earlier with the heat radiating cover plate 130 in, realize the preliminary location to the heat radiating cover plate 130, then align the third screw hole 132 of heat radiating cover plate 130 with the fourth screw hole on the second lateral wall 114, pass through bolt-up at last. The arrangement of the limiting columns 133 enables the alignment process of the third threaded holes 132 and the fourth threaded holes to be more convenient and faster, so that the assembly efficiency of the heat dissipation cover plate 130 is improved.

Referring to fig. 2 and 3, in the present embodiment, a sealing sleeve 116 for sealing the metal housing 110 and the heat dissipation cover plate 130 is disposed on the inner wall of the mounting opening 1141, so as to effectively isolate the interior of the metal housing 100 from the outside, thereby shielding wind cutting noise generated by the fluorescent wheel assembly 120 during operation and noise generated when the fluorescent wheel assembly collides with the inner wall of the metal housing 100, and greatly improving sensory experience of a user. Wherein, the sealing sleeve 116 can be made of rubber, silica gel and other materials.

Referring to fig. 2 and 12, in the present embodiment, a plurality of heat dissipation ribs 140 may be disposed on an outer surface of the metal shell 110 along a flow direction of the cooling air, so as to further increase a heat dissipation area of the metal shell 110, thereby improving heat dissipation efficiency, and further blowing heat on the heat dissipation ribs 140 to the outside of the whole machine by the cooling air. In this embodiment, a plurality of heat dissipating ribs 140 are disposed on the outer surface of the top wall 112 of the metal housing 110.

Referring to fig. 2 and 3, in this embodiment, a heat sink 150 may be specially disposed on an outer surface of the first sidewall 113 of the metal casing 100, and the heat sink 150 is fixed on an outer surface of the second sidewall 113 through a bolt 115 to increase a heat dissipation area of the outer surface of the second sidewall 113, so as to improve a heat dissipation efficiency of the metal casing 110.

Referring to fig. 2, in the present embodiment, the heat conductive silicone grease 117 is disposed between the heat sink 150 and the first sidewall 113 to further improve the heat transfer efficiency between the first sidewall 113 of the metal housing 110 and the heat sink 150, so that heat on the metal housing 110 can be effectively transferred to the heat sink 150, and further, the heat dissipation efficiency of the metal housing 110 is improved.

Referring to fig. 4 to 7, in the specific fixing of the interposer 121 according to this embodiment, a stepped hole 1132 may be disposed on the first side wall 113 of the metal housing 110, and a first threaded hole coaxial with the stepped hole 1132 is disposed on the interposer 121, the first side wall 113 and the interposer 121 are fastened and connected by a bolt 115 disposed in the stepped hole 1132 and the first threaded hole, and meanwhile, a head of the bolt 115 abuts against a stepped surface 1133 of the stepped hole 1132, so as to ensure that the bolt 115 connects the first side wall 113 and the interposer 113 together, and shorten a length of the bolt 115, thereby improving an assembling accuracy of the bolt 115, for example, a thickness of a tail portion of the bolt 115 penetrating into the interposer 121 may be controlled to be 0.3mm, thereby ensuring reliable fixing and avoiding the bolt 115 from hitting a coil of the interposer 121 that passes through the motor 123.

In addition, by abutting the head of the bolt 115 on the step surface 1133 of the step hole 1132, even if the bolt 115 completely protrudes into the first sidewall 113 of the metal shell 110, interference with the installation of the heat sink 150 on the outer surface of the first sidewall 113 is avoided.

In this embodiment, the adapter plate 121 is fixed on the first sidewall 113 of the metal housing 110 by the bolt 115, which not only improves the connection strength between the adapter plate 121 and the metal housing 110, but also makes the assembly between the fluorescent wheel assembly 120 and the metal housing 110 more convenient and faster.

Because the metal shell 110 has strong rigidity, the metal shell 110 is rigidly connected with the adapter plate 121 of the fluorescent wheel assembly 120 through the bolt 115, so that the overall rigidity is enhanced, the vibration and oscillation amplitude of the fluorescent wheel assembly 120 can be more effectively controlled, and the noise generated by the fluorescent wheel assembly 120 in the vibration or oscillation process is reduced. In addition, the junction of the adapter plate 121 and the first sidewall 113 is tightly attached, and the flatness and the precision are high, so that the fluorescent wheel 122 can be further ensured to rotate stably, and the noise generated by the fluorescent wheel assembly 120 due to the self-operation can be further suppressed.

Further, an adhesive layer may be provided between the head of the bolt 115 and the wall of the stepped hole 1132 to further prevent the bolt 115 from being loosened.

In addition, a sealing sleeve (not shown) for sealing the metal housing 110 and the bolt 115 may be provided in the stepped hole 1132 to effectively seal the stepped hole 1132, thereby shielding noise inside the metal housing 110.

FIG. 13 is an internal structural view of the metal shell of FIG. 2 from a second perspective; fig. 14 is a partial structural schematic diagram of the second viewing angle of fig. 3. Referring to fig. 7, 13 and 14, the light conversion mechanism of the present embodiment further includes a sensor 160 and a mounting bracket 170.

As shown in fig. 14, when the sensing area 1231 of the motor 123 rotates to a position right below the sensor 160, the sensor 160 transmits a sensing signal to an external control module, so as to obtain parameters such as the rotation frequency of the motor 123, and further control the operating parameters such as the rotation frequency of the motor 123 through the control module.

In order to fix the sensor 160, in this embodiment, an integrated mounting platform 1135 is formed on the inner surface of the first side wall 113 of the metal casing 110, a first positioning column 1136 and a second threaded hole are provided on the mounting platform 1136, a first positioning hole matched with the first positioning column 1136 and a through hole 171 matched with the second threaded hole are provided on the mounting bracket 170, the mounting bracket 170 is fastened to the mounting platform 1135 by a bolt inserted into the through hole 171 and the second threaded hole, and the sensor 160 is fixed on the mounting bracket 170.

During assembly, fix sensor 160 at installing support 170 earlier, then establish the first locating hole cover on installing support 170 and set up on first locating post 1136 on mounting platform 1135 to the realization is to the preliminary location of installing support 170, realizes installing support 170's fixing through the bolt at last, thereby accomplishes sensor 160's assembly.

By fixing the sensor 160 to the mounting bracket 170, the mounting angle of the sensor 160 can be flexibly adjusted by attaching and detaching and replacing the sensor 160, thereby ensuring accurate positioning of the sensor 160. The mounting platform 1135 is disposed on the first sidewall 113 to improve the positioning accuracy of the mounting bracket 170, so that the mounting bracket 170 can be accurately positioned at a preset position, thereby ensuring that the sensor 160 fixed on the mounting bracket 170 is accurately controlled above the sensing area 1231 of the motor 123, and ensuring the sensing effect of the sensor 160.

In practical applications, the sensor 160 is integrated on a first board of a circuit board, the circuit board is fixed on the mounting bracket 170, a vertical socket 180 is welded on a second board of the circuit board, a connecting wire 300 is connected to the socket 180, one end of the connecting wire 300 is electrically connected to the sensor 160 through the circuit board, and the other end of the connecting wire 300 passes through the top wall 112 of the metal shell 110 to be connected to the power board 400, so as to energize the sensor 160.

Referring to fig. 2 and 14, a preset opening 1121 is formed in the top wall 112 of the metal shell 110 of the present embodiment, a wire passing cover 118 is covered on the preset opening 1121, and a wire passing hole 1181 through which a connecting wire 300 electrically connected to the sensor 160 passes is formed in the wire passing cover 118. The wire passing hole 1181 is formed in the wire passing cover plate 118, so that the size of the wire passing hole 1181 can be conveniently controlled, and the phenomenon that the wire passing hole 1181 is too large to seal the inside of the metal shell 110 is avoided.

In this embodiment, a sealing sleeve 115 for sealing the metal housing 110 and the wire passing cover 118 is disposed on an inner wall of the predetermined opening 1121 to achieve a sealing effect.

Further, in the present embodiment, a matte black coating (not shown in the figure) is disposed on the surface of the mounting bracket 170 to effectively absorb stray light, so as to prevent the stray light from interfering with the sensing effect of the sensor 160, and thus improve the sensing sensitivity of the sensor 160 to the motor 123.

Referring to fig. 1 to 4, the present embodiment further provides a laser projection apparatus including a laser generating mechanism 200 and the light converting mechanism 100 of the above embodiments, the light converting mechanism 100 is stacked with the laser generating mechanism 200, and the fluorescent wheel 122 of the light converting mechanism 100 extends into the laser generating mechanism 200, and the laser light generated by the laser generating mechanism 200 vertically passes through the fluorescent wheel 122 and extends into the laser generating mechanism 200.

Specifically, the laser light generating mechanism 200 includes a fixing plate 220 and two sets of lenses 210 disposed on a side of the fixing plate 220 facing away from the light conversion mechanism 110, and the bottom wall 111 of the metal housing 110 in the light conversion mechanism 100 is fixed to the fixing plate 220. The fluorescent wheel 122 of the light conversion mechanism 100 passes through the bottom wall 111 and the fixing plate 220 and extends into a space between two sets of lenses 210, wherein one set of lenses 210 is a condensing lens and is located at the front side of the fluorescent wheel 122, so that the laser generated by the laser generating mechanism 200 is condensed by the condensing lens and then is incident on the fluorescent wheel 122. The other group of lenses 210 is an astigmatic lens and is located behind the fluorescent wheel 122, so that the monochromatic laser light is converted into RGB tricolor laser light by the fluorescent wheel 122 and then transmitted to an external projection screen by the astigmatic lens.

Referring to fig. 3, in order to prevent the laser generating mechanism 200 stacked on the light conversion mechanism 100 from being affected by the vibration of the light conversion mechanism 100, the present embodiment provides a shock absorbing pad 500 between the laser generating mechanism 200 and the light conversion mechanism 100, specifically, between the fixing plate 220 and the bottom wall 111 of the metal housing 110, so as to reduce the transmission of the vibration generated during the operation of the fluorescent wheel assembly 120 of the light conversion mechanism 100 to the laser generating mechanism 200 and reduce the collision noise between the light conversion mechanism 100 and the laser generating mechanism 200. The shock pad 500 may be made of a material having elastic buffering properties, such as silica gel or rubber.

According to the laser projection device provided by the embodiment, the light conversion structure 100 is stacked on the laser generation mechanism 200, so that the heat dissipation efficiency of the light conversion structure 100 is effectively improved, the fluorescent wheel 122 in the light conversion structure 100 is ensured to effectively convert monochromatic laser generated by the laser generation mechanism 200 into RGB (red, green and blue) tricolor laser, the service life of the laser projection device is prolonged, and noise generated in the operation process of the laser projection device is reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims (13)

1. A light conversion mechanism, comprising: a metal housing and a fluorescent wheel assembly;

the metal shell comprises a bottom wall, a top wall and a first side wall positioned between the bottom wall and the top wall, and the bottom wall is provided with an opening;

the fluorescent wheel assembly comprises: the fluorescent wheel is rotatably arranged at the second end of the adapter plate, and a part of the fluorescent wheel penetrates through the opening and extends out of the metal shell.

2. The light conversion mechanism of claim 1, wherein the metal housing further comprises a second sidewall opposite the first sidewall, the second sidewall having a mounting opening therein, the mounting opening being covered by a heat dissipating cover;

the inner surface of the heat dissipation cover plate is provided with at least one protrusion, and/or the outer surface of the heat dissipation cover plate is provided with at least one heat dissipation rib.

3. The light conversion mechanism of claim 2 wherein the mounting port is provided with a sealing boot for sealing the metal housing and the heat sink cover plate.

4. The light conversion mechanism according to claim 1, wherein a plurality of heat dissipation ribs are arranged on an outer surface of the metal housing in a flow direction of cooling wind.

5. A light conversion mechanism as claimed in any one of claims 1 to 4 wherein the light conversion mechanism is further provided with a heat sink in heat conductive contact with the first side wall of the metal housing by means of a heat conductive silicone grease.

6. The light conversion mechanism of any one of claims 1-4 wherein the first sidewall of the metal housing is provided with a stepped bore, and the adapter plate is provided with a first threaded bore coaxial with the stepped bore; the first side wall and the adapter plate are fixedly connected through bolts penetrating through the step holes and the first threaded holes, and the heads of the bolts abut against the step surfaces of the step holes.

7. The light conversion mechanism of claim 6 wherein an adhesive layer is disposed between the head of the bolt and the wall of the stepped bore.

8. The light conversion mechanism of claim 6 wherein a gland is disposed within the stepped bore for sealing the metal housing and bolt.

9. The light conversion mechanism of any one of claims 1-4, further comprising a sensor and a mounting bracket;

the first side wall of the metal shell is provided with an integrated mounting platform, and the mounting platform is provided with a first positioning column and a second threaded hole;

the mounting bracket is provided with a first positioning hole matched with the first positioning column and a through hole matched with the second threaded hole, and the mounting bracket is fixedly connected to the mounting platform through bolts penetrating through the through hole and the second threaded hole;

the sensor is fixed on the mounting bracket.

10. The light conversion mechanism of claim 9, wherein a predetermined opening is formed in a top wall of the metal shell, a wire-passing cover plate is covered at the predetermined opening, and a wire-passing hole for passing a connecting wire electrically connected to the sensor is formed in the wire-passing cover plate;

and a sealing sleeve for sealing the metal shell and the wire passing cover plate is arranged on the inner wall of the preset opening.

11. The light conversion mechanism of claim 9, wherein a surface of the mounting bracket is provided with a matte black coating.

12. A laser projection device, comprising: a laser generating mechanism and the light converting mechanism of any one of claims 1 to 11, wherein the light converting mechanism is stacked with the laser generating mechanism and a fluorescent wheel of the light converting mechanism extends into the laser generating mechanism, and the laser generated by the laser generating mechanism vertically penetrates through a part of the fluorescent wheel extending into the laser generating mechanism.

13. The laser projection device of claim 12, wherein a shock pad is disposed between the laser light generating mechanism and the light conversion mechanism.

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