CN219933592U - Laser projection equipment - Google Patents

Abstract

A laser projection device relates to the technical field of laser projection and aims at solving the problem that the actual projection angle of the laser projection device is affected by rotation of supporting legs due to vibration and shaking of a desktop. The regulation pole sets up in the bottom of casing, and the first end of regulation pole stretches into in the lift hole, and regulation pole and the inner wall threaded connection in lift hole to make the regulation pole can follow its axial lift. The support leg is connected to the second end of the adjustment rod. The first self-locking piece is connected to the bottom wall of the shell and is arranged around the center line of the adjusting rod. The second self-locking piece is connected to the support leg and is positioned between the adjusting rod and the first self-locking piece, and the first self-locking piece is contacted with the second self-locking piece. The utility model is used for laser projection display.

Description

Laser projection equipment

Technical Field

The utility model relates to the technical field of laser projection, in particular to laser projection equipment.

Background

As the market for laser projection devices expands, the competition for laser projection devices becomes more and more intense, and therefore, higher and higher demands are placed on the user experience of the product.

In the related art, in order to guarantee user experience, the projection effect of the laser projection equipment needs to be guaranteed, so that a plurality of supporting legs capable of adjusting the height of the laser projection equipment are generally arranged between the bottom surface of the laser projection equipment and a tabletop, the supporting legs can be rotated to achieve lifting, and the projection angle of the laser projection equipment is adjusted by adjusting the heights of different supporting legs, so that the optimal projection effect is guaranteed.

However, due to vibration, shaking, etc. of the desktop, the stand bars may rotate to some extent, which may affect the actual projection angle of the laser projection device, thereby reducing the user experience.

Disclosure of Invention

The utility model provides laser projection equipment, which is used for solving the problem that the actual projection angle of the laser projection equipment is affected by the rotation of supporting legs due to the vibration, the shaking and the like of a desktop.

The utility model provides laser projection equipment which comprises a shell, an adjusting rod, supporting legs, a first self-locking piece and a second self-locking piece, wherein a lifting hole is formed in the bottom of the shell. The regulation pole sets up in the bottom of casing, and the first end of regulation pole stretches into in the lift hole, and regulation pole and the inner wall threaded connection in lift hole to make the regulation pole can follow its axial lift. The support leg is connected to the second end of the adjustment rod. The first self-locking piece is connected to the bottom wall of the shell and is arranged around the center line of the adjusting rod. The second self-locking piece is connected to the support leg and is positioned between the adjusting rod and the first self-locking piece, and the first self-locking piece is contacted with the second self-locking piece.

According to the laser projection equipment, the shell is placed at a proper place such as a table top, the supporting angle is positioned between the table top and the shell, and the adjusting rod is in threaded connection with the inner wall of the lifting hole, so that the adjusting rod can move along the axial direction of the adjusting rod.

After the adjustment is completed, the supporting legs are placed on the tabletop, at the moment, the first self-locking piece is in contact with the second self-locking piece, friction force can be provided for the second self-locking piece, so that even if the supporting legs vibrate, shake and the like and have a rotating trend, the adjusting rods have the rotating trend, the second self-locking piece can be prevented from moving due to the friction force between the first self-locking piece and the second self-locking piece, the supporting legs are prevented from rotating, the adjusting rods are prevented from rising or falling, self-locking of the adjusting rods is achieved, the placement stability of the laser projection equipment is guaranteed, the projection angle of the laser projection equipment is prevented from changing, and user experience is improved.

In some embodiments of the present utility model, the first self-locking member includes a supporting portion and a plurality of gear teeth, wherein the supporting portion is connected to the bottom wall of the housing and is disposed around a center line of the adjusting lever. The plurality of gear teeth are connected to one side of the supporting part, which is close to the adjusting rod, and are arranged around the center line of the adjusting rod. The second self-locking piece comprises an elastic part and a meshing part, and the elastic part is connected to the support leg. The engagement portion is connected to the elastic portion and engaged with the gear teeth.

The self-locking function is realized by the engagement between the gear teeth and the engagement part. The shell is prevented from shaking under the conditions of desktop vibration and the like, so that the stability of the projection view angle of the optical device inside the shell is ensured.

In some embodiments of the present utility model, the elastic part is provided in plurality, and the plurality of elastic parts are arranged at intervals around the center line of the adjusting lever. The meshing part is provided with a plurality of, and a plurality of elastic parts correspond to a plurality of meshing parts one by one, and the meshing parts are connected to the corresponding elastic parts.

The elastic parts are arranged at intervals, so that the deformation of the elastic parts can be more convenient, and an operator can twist the adjusting rod conveniently.

In some embodiments of the present utility model, the engaging portion includes a plurality of engaging projections which are disposed in sequence along an arrangement direction of the plurality of gear teeth, the engaging projections extending between adjacent two of the gear teeth.

The plurality of engagement protrusions are engaged with the gear teeth, so that the self-locking function of the adjusting rod is ensured on the basis that an operator can conveniently screw the adjusting rod.

In some embodiments of the present utility model, the laser projection apparatus further includes a connection part, the bottom of the housing is provided with a mounting hole, the connection part is fixed in the mounting hole, the lifting hole is provided on the connection part, and the hole depth direction of the mounting hole is consistent with or parallel to the hole depth direction of the lifting hole.

The lifting hole is formed on the connecting part, so that the cost of the shell is reduced, and the lifting hole is convenient to form.

In some embodiments of the present utility model, the laser projection apparatus further includes a clamping structure disposed between the outer peripheral wall surface of the connection portion and the inner wall of the mounting hole, the clamping structure including a clamping protrusion and a clamping groove, one of the clamping protrusion and the clamping groove being disposed on the connection portion, the other of the clamping protrusion and the clamping groove being disposed on the inner wall of the mounting hole, the clamping protrusion extending into the clamping groove.

The connecting part is clamped in the mounting hole by the clamping structure, so that the connecting part is convenient to mount.

In some embodiments of the present utility model, a guiding space is formed on the bottom wall of the housing, and the guiding space is disposed around the center line of the adjusting rod. The laser projection device further comprises a guide member connected to the leg and extending partially into the guide channel.

The guiding piece is matched with the guiding space, so that an operator can conveniently screw the adjusting rod.

In some embodiments of the utility model, the guide is disposed about a center line of the adjustment rod.

The guide piece provides guide for the adjusting rod everywhere around the axial direction of the adjusting rod so that the adjusting rod can stably rotate.

In some embodiments of the utility model, the laser projection device further comprises a scratch pad disposed on the leg on a side of the leg remote from the adjustment lever.

The scratch-proof pad is arranged to avoid the support feet from scratching the tabletop.

In some embodiments of the present utility model, the positioning structure is located between the foot and the scratch pad, the positioning structure includes a positioning protrusion and a positioning groove, one of the positioning protrusion and the positioning groove is disposed on the foot, the other of the positioning protrusion and the positioning groove is disposed on the scratch pad, and the positioning protrusion extends into the positioning groove.

The positioning structure is arranged to provide positioning for the scratch-proof pad, so that the scratch-proof pad is convenient to set and fix.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

FIG. 1 is a schematic view of an external structure of a laser projection apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a laser projection device according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a laser projection device according to an embodiment of the present utility model;

FIG. 4 is a schematic view of an external structure of a case moving position change according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an external structure of a laser projection apparatus according to an embodiment of the present utility model;

FIG. 6 is an exploded view of a laser projection device according to an embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of a laser projection device according to an embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a laser projection device according to an embodiment of the present utility model;

FIG. 9 is a schematic view of an external structure of the engagement protrusion and engagement groove according to the embodiment of the present utility model;

FIG. 10 is a schematic cross-sectional view of a connecting portion and a mounting hole according to an embodiment of the present utility model;

FIG. 11 is a schematic diagram of an external structure of a laser projection apparatus according to an embodiment of the present utility model;

FIG. 12 is an enlarged partial schematic view of FIG. 11 at A;

FIG. 13 is a schematic view of an external structure of a second self-locking member according to an embodiment of the present utility model;

FIG. 14 is a schematic view showing the external structure of the connection between the leg and the elastic portion according to the embodiment of the present utility model;

FIG. 15 is a schematic view of an external structure of a meshing portion according to an embodiment of the present utility model;

FIG. 16 is an enlarged partial schematic view at B in FIG. 3;

FIG. 17 is an enlarged partial schematic view of FIG. 15 at C;

FIG. 18 is a schematic view of an external structure of a laser projection device with scratch pad according to an embodiment of the present utility model;

FIG. 19 is a schematic cross-sectional view of a positioning structure according to an embodiment of the present utility model;

fig. 20 is a schematic view of an external structure of the scratch pad according to the embodiment of the present utility model.

Reference numerals: 1-a laser projection device; 11-a housing; 111-lifting holes; 112-mounting holes; 1121-second strip-shaped projections; 113-a guide; 114-guiding space; 12-adjusting the rod; 13-supporting legs; 14-a first self-locking member; 141-a support; 142-gear teeth; 15-a second self-locking member; 151-an elastic part; 152-engagement; 1521-engaging projections; 16-a connection; 161-first strip-shaped projections; 17-clamping structure; 171-snap-fit protrusions; 172-clamping grooves; 18-scratch pad; 19-positioning structure; 191-positioning grooves; 192-positioning projections.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, when describing a pipeline, the terms "connected" and "connected" as used herein have the meaning of conducting. The specific meaning is to be understood in conjunction with the context.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

A laser television generally includes a laser projection apparatus capable of projecting a picture or the like onto a projection screen using a laser as a display light source to realize picture display, and a projection screen.

Based on this, referring to fig. 1, the present utility model provides a laser projection device 1, which includes a housing 11 and an optical device (not shown in fig. 1), wherein the housing 11 is placed on a table surface, and the optical device is disposed in the housing 11. The housing 11 provides protection, support, etc. for optics that can emit laser light, etc. onto the projection screen to effect a picture display.

It will be appreciated that the housing 11 should have light outlets, line interfaces, etc. to ensure that the internal optics can perform their projection functions.

The casing 11 may be in a cuboid shape, which is a regular shape, and is convenient to process. Of course, the housing 11 may have any other suitable shape such as a square shape, an irregular shape, or the like.

In order to ensure the projection effect of the optical device on the projection screen, it is generally necessary to adjust the projection viewing angle of the optical device so that the laser light can be irradiated onto the projection screen at a proper angle, thereby meeting the projection requirement.

Accordingly, there is provided a laser projection apparatus 1 in the related art, which includes, in addition to the housing 11 and the optical device described above, a plurality of casters, for example, such that the plurality of casters are respectively distributed at corners of the bottom of the housing 11, the casters are screwed to the bottom of the housing 11, the housing 11 is placed on a table surface by the casters, and the housing 11 can be raised or lowered with respect to the table surface by rotating the casters.

In this way, when the projection view angle of the optical device needs to be adjusted, the caster wheels at different positions can be adjusted, so that the housing 11 is inclined to a certain extent, and the optical device inside the housing 11 is inclined to a certain extent, so that the projection view angle of the optical device is adjusted.

However, when the housing 11 collides or the table vibrates, the casters may move to rotate, so that a certain position of the housing 11 rises or falls, and the projection angle of the optical device is changed, so that the optical device is not suitable for the projection screen, the projection effect is affected, and the use experience of a user is further affected.

In the related art, in order to solve the above-mentioned problems, a C-shaped corner block is generally added outside the caster, and the caster is wrapped with the C-shaped corner block, so that the caster cannot move, thereby ensuring the stable projection view angle of the optical device. However, such operation is troublesome, and the overall appearance of the laser projection device 1 is poor, which affects the user experience.

Alternatively, in another related art, after adjusting the projection angle of the optical device, the screw connection portion of the caster and the housing 11 is locked by a locking member to prevent the caster from rotating relative to the housing 11, so as to ensure that the projection angle of the optical device does not change. However, the locking member is required to lock the device, and thus the operation is troublesome.

With reference to fig. 2, fig. 2 is a schematic cross-sectional view of a laser projection apparatus 1 according to an embodiment of the present utility model, where a lifting hole 111 is formed at the bottom of a housing 11 of the laser projection apparatus 1. Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a laser projection apparatus 1 according to an embodiment of the present utility model, which further includes an adjusting rod 12, a supporting leg 13, a first self-locking member 14 and a second self-locking member 15. The adjusting rod 12 is disposed at the bottom of the housing 11, a first end of the adjusting rod 12 extends into the lifting hole 111, and the adjusting rod 12 is in threaded connection with an inner wall of the lifting hole 111, so that the adjusting rod 12 can lift along the axial direction thereof. The leg 13 is connected to a second end of the adjustment lever 12. The first self-locking member 14 is connected to the bottom wall of the housing 11 and is disposed around the center line of the adjusting rod 12. The second self-locking member 15 is connected to the supporting leg 13 and located between the adjusting rod 12 and the first self-locking member 14, and the first self-locking member 14 contacts with the second self-locking member 15.

In this way, when the height of the housing 11 needs to be adjusted, a torsion force can be applied to the support legs 13 to drive the adjusting rod 12 to rotate, so that the portion of the adjusting rod 12 extending into the housing 11 is lengthened or shortened, that is, the adjusting rod 12 is lifted or lowered, thereby lifting or lowering the housing 11, and further lifting or lowering the optical device inside the housing 11.

After the adjustment is completed, the supporting leg 13 is placed on the tabletop, at this time, the first self-locking piece 14 is in contact with the second self-locking piece 15, so that the first self-locking piece 14 can provide friction force for the second self-locking piece 15, even if the supporting leg 13 has a rotating trend due to vibration, shaking and the like, and further the adjusting rod 12 has a rotating trend, the second self-locking piece 15 can be prevented from moving due to the friction force between the first self-locking piece 14 and the second self-locking piece 15 so as to prevent the supporting leg 13 from rotating, and further prevent the adjusting rod 12 from rotating, so that the adjusting rod 12 is prevented from ascending or descending, the self-locking of the adjusting rod 12 is realized, the placement stability of the laser projection device 1 is ensured, the projection angle of the laser projection device 1 is prevented from changing, and the user experience is improved.

In addition, compared with the scheme of arranging the C-shaped corner block, the utility model does not need to wrap the supporting legs 13, so that the whole laser projection device 1 is more attractive.

Compared with the scheme for arranging the locking component, the locking component does not need to be operated, and the operation difficulty can be reduced. And is simpler in construction.

It can be understood that the housing 11 can be raised by rotating the adjustment lever 12 clockwise, and the housing 11 can be lowered by rotating the adjustment lever 12 counterclockwise.

Alternatively, the housing 11 may be raised by rotating the adjustment lever 12 counterclockwise, and the housing 11 may be lowered by rotating the adjustment lever 12 clockwise. The present utility model is not particularly limited, and may be specifically set according to the rotation direction of the adjustment lever 12 and the user's requirement.

The shape of the leg 13 may be a regular shape such as a cylinder or a cube, or may be an irregular shape, which is not particularly limited.

The lifting hole 111 may be a through hole or a blind hole, as long as the lifting of the adjustment lever 12 can be satisfied.

In some embodiments, the adjusting lever 12 may be a screw, or the adjusting lever may include a lever body and a threaded portion, and the leg 13 is connected to the second end of the lever body, and the connection is implemented by using threads between the threaded portion and the inner wall of the lifting hole 111, so as to lift the lever body.

In some embodiments, the first self-locking member 14 and the housing 11 may be integrally formed, so that the overall structural strength of the two parts can be increased, and secondary processing can be avoided.

Of course, the first self-locking member 14 and the housing 11 may be separate structures, and the first self-locking member 14 and the housing 11 may be manufactured separately and then connected together by any suitable means such as gluing, screw fastening, etc.

In some embodiments, the second self-locking member 15 and the supporting leg 13 may be integrally formed, so that the overall structural strength of the two parts can be increased, and secondary processing can be avoided.

Of course, the second self-locking member 15 and the supporting leg 13 may be in a split structure, and the second self-locking member 15 and the supporting leg 13 are respectively manufactured and then connected together by any suitable means such as gluing, screw fastening, etc.

For example, one lifting hole 111 may be formed, and one corresponding adjusting rod 12, one corresponding supporting leg 13, one corresponding first self-locking member 14, and one corresponding second self-locking member 15 may be formed, so that the lifting of the housing 11 is adjusted by using one supporting leg 13. In this case, referring to fig. 4, fig. 4 is a schematic diagram of an external structure of a movement position change of the housing 11 according to an embodiment of the present utility model, in order to adjust a projection angle of an optical device, a bottom first edge of the housing 11 is in contact with a table top, and the lifting hole 111 is located on a side of a bottom center of the housing 11 away from the first edge, so that when the adjusting lever 12 is rotated, the housing 11 can move away from or close to the table top with the first edge as a rotation axis, thereby changing the projection angle of the optical device.

Referring to fig. 5, fig. 5 is a schematic diagram of an external structure of the laser projection apparatus 1 according to the embodiment of the present utility model, a plurality of lifting holes 111 may be formed, and a plurality of lifting holes 111 may be distributed on the bottom surface of the housing 11, for example, two, three or four lifting holes are provided, a plurality of corresponding adjusting rods 12, supporting legs 13, first self-locking members 14 and second self-locking members 15 are provided, a plurality of adjusting rods 12 are in one-to-one correspondence with a plurality of lifting holes 111, a plurality of supporting legs 13 are in one-to-one correspondence with a plurality of adjusting rods 12, a plurality of first self-locking members 14 are in one-to-one correspondence with a plurality of first supporting legs 13, and a plurality of second self-locking members 15 are in one-to-one correspondence with a plurality of first self-locking members 14.

In this case, when adjusting the projection angle of the optical device, the adjustment lever 12 at the corresponding position may be adjusted as needed to partially raise or lower the housing 11 at the corresponding position. Thereby changing the inclination angle of the housing 11 and thus the projection angle of the optical device inside the housing 11.

For example, please continue to refer to fig. 5, the casing 11 is set to be rectangular, the lifting holes 111 are set to be four, so that the four lifting holes 111 are respectively opened at four vertex angle positions at the bottom of the rectangular casing 11, when the light emitting angle of the optical device needs to be adjusted, the adjusting rod 12 at the corresponding vertex angle position can be lifted, then the adjusting rod 12 is rotated, so that the supporting leg 13 is close to or far away from the bottom of the casing 11, and then the supporting leg 13 is placed on a desktop, so that the height of the vertex angle of the casing 11 is adjusted, and the light emitting angle of the optical device is adjusted.

In order to form the elevation hole 111 on the housing 11, the elevation hole 111 may be directly opened on the bottom wall of the housing 11, and then a screw thread may be opened on the inner wall of the elevation hole 111, thereby forming the elevation hole 111 and enabling the adjustment lever 12 to be coupled with the screw thread in the elevation hole 111. Thereby achieving lifting and lowering of the housing 11.

In some embodiments, referring to fig. 6, fig. 6 is an exploded schematic view of the laser projection apparatus 1 provided by the embodiment of the present utility model, the laser projection apparatus 1 further includes a connection portion 16, referring to fig. 7, fig. 7 is a schematic cross-sectional view of the laser projection apparatus 1 provided by the embodiment of the present utility model, a mounting hole 112 is formed at the bottom of the housing 11, the connection portion 16 is fixed in the mounting hole 112, the lifting hole 111 is formed on the connection portion 16, and the hole depth direction of the mounting hole 112 is consistent with or parallel to the hole depth direction of the lifting hole 111.

In this way, when the lifting hole 111 is formed, the mounting hole 112 is first opened on the bottom wall of the housing 11, then the connecting portion 16 is placed and fixed in the mounting hole 112, and the adjusting rod 12 is screwed with the lifting hole 111 on the connecting portion 16, so that the projection angle of the optical device in the housing 11 is adjusted by rotating the adjusting rod 12.

Since the connection portion 16 is independent of the housing 11, the material of the connection portion 16 can be selected as needed so that the material of the connection portion 16 satisfies the need for processing the lifting hole 111, and the setting of the lifting hole 111 can be facilitated without considering the housing 11.

It will be appreciated that in order to enable the adjustment lever 12 to be raised and lowered, the connection 16 should not rotate with the adjustment lever 12 when the adjustment lever 12 is rotated, i.e. the connection 16 should be stationary with respect to the housing 11.

The connection portion 16 may include a nut, and a screw hole formed in the nut is a lifting hole 111.

In this case, since the connecting portion 16 (nut) is generally made of stainless steel material or copper material or alloy material, the structural strength of the connecting portion 16 as a whole is high, and the structural strength of the threads inside thereof is also high, so that breakage of the threads can be avoided when the adjustment lever 12 is rotated, and the service life of the threads can be ensured.

In this case, the whole casing 11 is not required to be changed into stainless steel material, copper material or alloy material in order to improve the structural strength of the screw thread, but other parts of the casing 11 are still made of plastic materials, and the structural strength of the screw thread can be ensured only by using one connecting part 16, so that the cost is reduced.

Alternatively, a member having a high strength may be provided, and then a lifting hole may be formed thereon to form the connection portion 16.

In order to stably mount the connection portion 16 in the mounting hole 112, the connection portion 16 may be directly mounted in the mounting hole 112, and then the connection portion 16 and the housing 11 may be fixed together by an appropriate means such as gluing. Thereby achieving stable setting of the connection portion 16.

Alternatively, in order to dispose the connecting portion 16 in the mounting hole 112, please refer to fig. 8, fig. 8 is a schematic cross-sectional view of the laser projection apparatus 1 provided in the embodiment of the present utility model, the laser projection apparatus 1 further includes a clamping structure 17, the clamping structure 17 is disposed between an outer peripheral wall surface of the connecting portion 16 and an inner wall of the mounting hole 112, and referring to fig. 9, fig. 9 is a schematic outer structure of the coupling protrusion 171 and the clamping groove 172 provided in the embodiment of the present utility model, the clamping structure 17 includes a clamping protrusion 171 and a clamping groove 172, one of the clamping protrusion 171 and the clamping groove 172 is disposed on the connecting portion 16, and the other of the clamping protrusion 171 and the clamping groove 172 is disposed on the inner wall of the mounting hole 112 (not shown in fig. 9), wherein the clamping protrusion 171 extends into the clamping groove 172.

Through the above arrangement, the engagement of the engaging protrusion 171 and the engaging groove 172 can prevent the connection portion 16 from being separated from the mounting hole 112 to the outside, so that the connection portion 16 is stably disposed in the mounting hole 112, thereby facilitating the subsequent fixing of the connection portion 16.

The clamping groove 172 may be disposed around a center line of the adjusting rod 12, and the corresponding clamping protrusion 171 may also be disposed around the center line of the adjusting rod 12, so that the inner wall of the clamping groove 172 may provide support for the clamping protrusion 171 in the circumferential direction around the center line of the adjusting rod 12, so that the connecting portion 16 may be more stably disposed in the mounting hole 112.

Of course, the locking groove 172 may not be provided around the center line of the adjustment lever 12, and the corresponding locking protrusion 171 may not be provided around the center line of the adjustment lever 12.

Alternatively, the engagement groove 172 may be provided around the center line of the adjustment lever 12, and the engagement protrusion 171 may not be provided around the center line of the adjustment lever 12.

When the engaging protrusion 171 and the engaging groove 172 are disposed around the center line of the adjusting rod 12, the engaging protrusion 171 and the engaging groove 172 are engaged with each other only to limit the movement of the connecting portion 16 along the axis of the adjusting rod 12, in which case, referring to fig. 10, fig. 10 is a schematic cross-sectional view of the connecting portion 16 and the mounting hole 112 provided in the embodiment of the utility model, a first strip-shaped protrusion 161 extending along the center line of the adjusting rod 12 (the direction perpendicular to the paper surface in fig. 10) is disposed on the outer wall surface of the connecting portion 16, the first strip-shaped protrusion 161 is disposed in plurality, and the plurality of first strip-shaped protrusions 161 are disposed around the center line of the adjusting rod 12 at intervals.

Correspondingly, as shown in fig. 10, a plurality of second strip-shaped protrusions 1121 extending along the central line of the adjusting rod 12 are also disposed on the inner wall of the mounting hole 112, the plurality of second strip-shaped protrusions 1121 are disposed at intervals around the central line of the adjusting rod 12, such that the first strip-shaped protrusions 161 extend between two adjacent second strip-shaped protrusions 1121, and such that the second strip-shaped protrusions 1121 extend between two adjacent first strip-shaped protrusions 161, and the connection portion 16 is restricted from rotating around the central line of the adjusting rod 12 by using the cooperation between the first strip-shaped protrusions 161 and the second strip-shaped protrusions 1121. Thereby achieving fixation of the connection portion 16.

The first strip-shaped protrusion 161 and the connecting portion 16 may be integrally formed, so that structural strength between the first strip-shaped protrusion and the connecting portion may be increased, and secondary processing may be avoided.

Of course, the first strip-shaped protrusion 161 and the connecting portion 16 may be formed as separate structures, and the first strip-shaped protrusion 161 and the connecting portion 16 may be formed by welding or other suitable techniques.

Similarly, the second strip-shaped protrusion 1121 and the housing 11 may be integrally formed, so that the structural strength between the two may be increased, and the secondary processing may be avoided.

Of course, the second strip-shaped protrusion 1121 and the housing 11 may be formed as separate structures, and the second strip-shaped protrusion 1121 and the housing 11 may be formed by separately processing and then connected together by using a suitable technique such as bonding.

In some embodiments, the connecting portion 16 may be disposed in the mounting hole 112 by injection molding, and the second strip-shaped protrusion 1121 may be injection molded between two adjacent first strip-shaped protrusions 131 during the injection molding process, so as to implement the clamping therebetween. Similarly, the clamping protrusion 171 is injection molded into the clamping groove 172, so as to achieve clamping therebetween.

By providing the first and second bar-shaped protrusions 161 and 1121, the catching protrusion 171 and the catching groove 172 can restrict the movement of the connection part 16 along the center line of the adjustment lever 12, and simultaneously restrict the rotation of the connection part 16 around the center line of the adjustment lever 12, thereby restricting the connection part 16 within the mounting hole 112.

For example, referring to fig. 9, the first strip-shaped protrusions 161 are disposed on both sides of the clamping groove 172 along the extending direction of the center line of the adjusting rod 12, so that the connecting portion 16 can be clamped in the mounting hole 112 more stably along the extending direction of the center line of the adjusting rod 12 than the first strip-shaped protrusions 161 disposed on only one side of the clamping groove 172.

In some embodiments, in order to make the first self-locking member 14 contact with the second self-locking member 15 so as to generate a certain self-locking force therebetween, referring to fig. 11 and 12, fig. 11 is a schematic view of an external structure of the laser projection apparatus 1 according to the embodiment of the present utility model; fig. 12 is an enlarged partial view of fig. 11 a, and the first self-locking member 14 includes a supporting portion 141 and a plurality of gear teeth 142, wherein the supporting portion 141 is connected to the bottom wall of the housing 11 and is disposed around the center line of the adjusting lever 12. The plurality of gear teeth 142 are connected to a side of the support portion 141 near the adjustment lever 12 and disposed around a center line of the adjustment lever 12. Referring to fig. 13, fig. 13 is a schematic view illustrating an external structure of a second self-locking member 15 according to an embodiment of the present utility model, wherein the second self-locking member 15 includes an elastic portion 151 and an engaging portion 152, and the elastic portion 151 is connected to the leg 13. The engagement portion 152 is connected to the elastic portion 151 and engages with the gear teeth 142 (on the supporting portion 141, not shown in fig. 13).

Through the above arrangement, when the projection view angle of the optical device in the housing 11 needs to be adjusted, the adjusting lever 12 is rotated, and when the adjusting lever 12 receives torque, the elastic portion 151 can repeatedly move in a direction approaching and moving away from the adjusting lever 12 to move along the arrangement direction of the plurality of gear teeth 142, thereby driving the adjusting lever 12 to rise and fall, so as to realize adjustment of the projection angle of the optical device.

After the adjustment is completed, the torque is removed, the engagement portion 152 can be engaged with the gear teeth 142, and the gear teeth 142 can prevent the engagement portion 152 from moving to a certain extent, so that even if the table top vibrates, when the adjustment lever 12 has a certain rotation tendency, the gear teeth 142 can prevent the adjustment lever 12 from rotating due to the engagement of the engagement portion 152 and the gear teeth 142, i.e., the engagement of the engagement portion 152 and the gear teeth 142 can exert a self-locking function, so that an optical device inside the housing 11 has a stable projection view angle.

It should be noted that the gear teeth 142 may be gear teeth on a gear in a conventional sense, or may be protrusions, so long as they can be engaged with the engagement portion 152.

The supporting portion 141 and the gear teeth 142 may be integrally formed, so that the overall connection strength of the supporting portion 141 and the gear teeth 142 may be ensured, and secondary processing may be avoided.

Of course, the supporting portion 141 and the gear teeth 142 may be formed as separate structures, and the supporting portion 141 and the gear teeth 142 may be formed by welding or other suitable techniques.

Similarly, the elastic portion 151 and the engaging portion 152 may be integrally formed, so that the overall connection strength between the two can be ensured, and secondary processing can be avoided.

Of course, the elastic portion 151 and the engaging portion 152 may be separate structures, and the elastic portion 151 and the engaging portion 152 may be manufactured separately and then fixed together by any suitable technique such as gluing.

On this basis, referring to fig. 14, fig. 14 is a schematic view showing an external structure of the connection between the support leg 13 and the elastic portion 151 according to the embodiment of the present utility model, the elastic portion 151 is provided with a plurality of elastic portions 151, and the plurality of elastic portions 151 are disposed at intervals around the center line of the adjusting rod 12. The engaging portions 152 are provided in plural, the plural elastic portions 151 are in one-to-one correspondence with the plural engaging portions 152, and the engaging portions 152 are connected to the corresponding elastic portions 151.

With the above arrangement, since the plurality of elastic portions 151 are disposed at intervals around the center line of the adjustment lever 12, a certain gap is provided between two adjacent elastic portions 151, so that the elastic portions 151 are more easily deformed when the adjustment lever 12 is rotated, and the rotation of the adjustment lever 12 is more easily facilitated.

Wherein, the elastic part 151 may be provided in two, three or more. The setting can be specifically performed according to actual conditions.

For example, with continued reference to fig. 14, two elastic portions 151 and two corresponding engaging portions 152 are provided, so that deformation of the elastic portions 151 can be maximally facilitated to facilitate rotation of the adjusting lever 12.

In other embodiments, one elastic portion 151 may be provided, and a plurality of engagement portions 152 may be provided. The plurality of engagement portions 152 are sequentially disposed along the arrangement direction of the plurality of gear teeth 142.

In this case, the elastic portion 151 may be made to revolve around the center line of the adjustment lever 12, and the corresponding plurality of engagement portions 152 may also revolve around the center line of the adjustment lever 12.

On this basis, referring to fig. 15, fig. 15 is a schematic external structure of an engaging portion 152 according to an embodiment of the present utility model, the engaging portion 152 includes a plurality of engaging protrusions 1521, the plurality of engaging protrusions 1521 are sequentially arranged along an arrangement direction of the plurality of gear teeth 142, and the engaging protrusions 1521 extend between two adjacent gear teeth 142.

Through the above arrangement, a plurality of engaging protrusions 1521 are provided on one elastic portion 151, and the engaging protrusions 1521 and the gear teeth 142 are engaged, so that the engaging strength between the engaging protrusions 1521 and the gear teeth 142 can be ensured, the self-locking strength to a certain extent can be ensured, and the excessive engaging strength between the engaging protrusions 1521 and the gear teeth 142 can be avoided, so that the operator can conveniently twist the adjusting rod 12.

It will be appreciated that the shape of the engagement protrusions 1521 should be adapted to the shape formed between two adjacent teeth 142, so that the teeth 142 can be better engaged with the engagement protrusions 1521 to ensure stable engagement therebetween.

Alternatively, the engagement portion 152 may include only one engagement protrusion 1521, with one engagement protrusion 1521 engaging the gear teeth 142, which further facilitates rotation of the adjustment rod 12, but also reduces the corresponding self-locking force.

In other embodiments, the first self-locking member 14 and the second self-locking member 15 may be directly contacted or abutted to generate a self-locking force by using a friction force between the two, so as to ensure stability of the arrangement of the housing 11 and avoid a change of a projection angle of an optical device inside the housing 11.

In order to ensure the rotation stability of the adjusting rod 12, please continue to refer to fig. 15, and refer to fig. 16, fig. 16 is a partially enlarged schematic view of the position B in fig. 3, a guiding space 114 is formed on the bottom wall of the housing 11, and the guiding space 114 is disposed around the center line of the adjusting rod 12. The laser projection device 1 further comprises a guide 113, the guide 113 being connected to the foot 13 and extending partly into the guide channel.

Through the arrangement, when the adjusting rod 12 is rotated, the guide member 113 can move along the guide space 114, so that the cooperation of the guide member 113 and the guide space 114 can provide guidance for the rotation of the adjusting rod 12, thereby avoiding the shaking of the adjusting rod 12 in the process of rotating the adjusting rod 12, and facilitating the rotation of the adjusting rod 12 by an operator.

Wherein, the guide 113 and the support leg 13 can be integrally formed, so that the integral structural strength of the guide and the support leg can be enhanced.

Alternatively, the guide 113 and the leg 13 may be formed separately, and the guide 113 and the leg 13 may be fixed by any suitable means such as bonding, clamping, or screw fastening.

The guide space 114 may be a guide groove, or the guide space 114 may be a guide hole, that is, the guide space 114 communicates with the inside of the housing 11.

In order to facilitate the opening of the guiding space 114 and the setting of the guiding element 113, the guiding space 114 is arranged around the first self-locking element 14, so that the setting of the first self-locking element 14 and the second self-locking element 15 does not affect the setting of the guiding space 114 and the guiding element 113, and the guiding element 113 can conveniently extend into the guiding space 114.

For example, referring to fig. 17, fig. 17 is an enlarged partial view of fig. 15C, and the guide 113 is disposed around the center line of the adjustment lever 12.

In this way, the guide 113 and the guide space 114 can be matched everywhere around the center line of the adjusting lever 12, so as to provide a stable guiding function for the supporting leg 13, so that the supporting leg 13 rotates more stably, and the adjusting lever 12 rotates more stably.

Alternatively, the guide 113 may include a plurality of guide bars disposed at intervals around the adjustment lever 12. This reduces the material for manufacturing the guide 113 and reduces the cost.

The plurality of guide rods may be uniformly spaced around the adjustment rod 12, or may be unevenly spaced around the adjustment rod 12.

In other embodiments, in order to avoid the foot 13 scratching the table top, referring to fig. 18, fig. 18 is a schematic view showing an external structure of the laser projection device 1 provided with the scratch pad 18 according to the embodiment of the present utility model, the laser projection device 1 further includes the scratch pad 18, and the scratch pad 18 is disposed on the foot 13 and located on a side of the foot 13 away from the adjusting rod 12 (inside the guide 113 in fig. 18). By providing the scratch pad 18, the feet 13 are prevented from directly contacting the table top, thereby protecting the table top from damage.

The scratch pad 18 may be made of a resilient material, such as silicone, so as to better protect the table top.

On this basis, in order to provide the scratch pad 18 on the leg 13, the scratch pad 18 may be adhered to the leg 13 by means of glue. Alternatively, the scratch pad 18 may be fixed to the leg 13 by screw fastening or the like.

In order to facilitate positioning and installation of the scratch pad 18, referring to fig. 19, fig. 19 is a schematic cross-sectional view of a positioning structure 19 provided in an embodiment of the present utility model, the laser projection apparatus 1 further includes a positioning structure 19, the positioning structure 19 is located between the support leg 13 and the scratch pad 18, the positioning structure 19 includes a positioning protrusion 192 and a positioning groove 191, one of the positioning protrusion 192 and the positioning groove 191 is disposed on the support leg 13, the other of the positioning protrusion 192 and the positioning groove 191 is disposed on the scratch pad 18, and the positioning protrusion 192 extends into the positioning groove 191.

Through setting up location protruding 192 and constant head tank 191 between preventing and drawing pad 18 and stabilizer blade 13 for when the fixed preventing and drawing pad 18 of installation, make earlier in the location protruding 192 stretches into the constant head tank 191, so can be with preventing drawing pad 18 location in preset position department, thereby avoid preventing drawing pad 18 and move in the plane that contacts with stabilizer blade 13, then utilize appropriate mode such as sticky again to fix the two together, so the installation of preventing drawing pad 18 of being convenient for more.

It can be appreciated that the shapes of the positioning protrusion 192 and the positioning groove 191 should be matched with each other so that a better positioning effect can be exerted.

For example, referring to fig. 19, and referring to fig. 20, fig. 20 is a schematic view of an external structure of the scratch pad 18 according to an embodiment of the present utility model, the positioning protrusion 192 is disposed on the scratch pad 18, and the positioning groove 191 is formed on the supporting leg 13. This allows a basis for the positioning function between the scratch pad 18 and the foot 13, ensuring the thickness of the scratch pad 18, and ensuring its structural strength.

The scratch-proof pad 18 and the positioning protrusion 192 can be integrally formed, so that the overall structural strength of the two can be increased, and secondary processing can be avoided.

Alternatively, the scratch pad 18 and the positioning protrusion 192 may be formed as separate structures, and the scratch pad 18 and the positioning protrusion 192 may be formed by separately manufacturing and then fastened together by any suitable means such as bonding, screw fastening, etc.

In addition, one positioning protrusion 192 may be provided, and one corresponding positioning groove 191 is also provided, so that the positioning installation of the scratch-proof pad 18 is realized by using the cooperation of one positioning groove 191 and one positioning protrusion 192.

Or, a plurality of positioning protrusions 192 may be provided, and a plurality of corresponding positioning grooves 191 are provided, and the plurality of positioning protrusions 192 and the plurality of positioning grooves 191 are in one-to-one correspondence, so that the positioning protrusions 192 extend into the corresponding positioning grooves 191, thereby realizing positioning.

Illustratively, the positioning protrusion 192 may be rectangular parallelepiped in shape, and the shape of the corresponding positioning groove 191 matches the shape of the positioning protrusion 192. The cuboid is in a regular shape, and is convenient to process during processing.

Of course, the positioning protrusion 192 may be irregularly shaped, and the shape of the corresponding positioning groove 191 should be matched with the shape of the positioning protrusion 192.

The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any changes or substitutions within the technical scope of the present utility model should be covered by the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims (10)

1. A laser projection device, the laser projection device comprising:

a housing, wherein a lifting hole is formed at the bottom of the housing;

the adjusting rod is arranged at the bottom of the shell, the first end of the adjusting rod extends into the lifting hole, and the adjusting rod is in threaded connection with the inner wall of the lifting hole so that the adjusting rod can lift along the axial direction of the adjusting rod;

the support leg is connected with the second end of the adjusting rod;

the first self-locking piece is connected to the bottom wall of the shell and is arranged around the central line of the adjusting rod;

the second self-locking piece is connected to the supporting leg and located between the adjusting rod and the first self-locking piece, and the first self-locking piece is in contact with the second self-locking piece.

2. A laser projection device as claimed in claim 1, wherein,

the first self-locking member includes:

the supporting part is connected to the bottom wall of the shell and is arranged around the central line of the adjusting rod;

the gear teeth are connected to one side, close to the adjusting rod, of the supporting part and are arranged around the center line of the adjusting rod in a circle;

the second self-locking member includes:

an elastic part connected to the support leg;

and the engagement part is connected to the elastic part and is engaged with the gear teeth.

3. The laser projection device as claimed in claim 2, wherein a plurality of the elastic parts are provided, and a plurality of the elastic parts are provided at intervals around a center line of the adjustment lever;

the meshing parts are provided with a plurality of elastic parts, the elastic parts and the meshing parts are in one-to-one correspondence, and the meshing parts are connected to the corresponding elastic parts.

4. A laser projection apparatus as claimed in claim 3, wherein the engagement portion includes a plurality of engagement projections which are provided in order along an arrangement direction of the plurality of gear teeth, the engagement projections extending between adjacent two of the gear teeth.

5. The laser projection device of any of claims 1 to 4, wherein the laser projection device further comprises:

the connecting part, the mounting hole has been seted up to the bottom of casing, connecting part is fixed in the mounting hole, the lifting hole set up in on the connecting part, just the hole depth direction of mounting hole with the hole depth direction of lifting hole is unanimous or parallel.

6. The laser projection device of claim 5, wherein the laser projection device further comprises:

the clamping structure is arranged between the outer peripheral wall surface of the connecting part and the inner wall of the mounting hole, the clamping structure comprises a clamping protrusion and a clamping groove, one of the clamping protrusion and the clamping groove is arranged on the connecting part, the other of the clamping protrusion and the clamping groove is arranged on the inner wall of the mounting hole, and the clamping protrusion extends into the clamping groove.

7. The laser projection apparatus as claimed in any one of claims 1 to 4, wherein a guide space is provided on a bottom wall of the housing, the guide space being provided around a center line of the adjustment lever;

the laser projection device further includes:

and the guide piece is connected to the support leg and partially extends into the guide space.

8. The laser projection device of claim 7, wherein the guide is disposed circumferentially about a centerline of the adjustment rod.

9. The laser projection device of any of claims 1 to 4, wherein the laser projection device further comprises:

the scratch-proof pad is arranged on the supporting leg and is positioned on one side of the supporting leg away from the adjusting rod.

10. The laser projection device of claim 9, wherein the laser projection device further comprises:

the positioning structure is located between the support legs and the scratch-preventing pad and comprises positioning protrusions and positioning grooves, one of the positioning protrusions and the positioning grooves is arranged on the support legs, the other one of the positioning protrusions and the positioning grooves is arranged on the scratch-preventing pad, and the positioning protrusions extend into the positioning grooves.