WO2021203946A1

WO2021203946A1 - Laser projector

Info

Publication number: WO2021203946A1
Application number: PCT/CN2021/081816
Authority: WO
Inventors: 周伯禹; 杨长明; 赵云
Original assignee: 青岛海信激光显示股份有限公司
Priority date: 2020-04-10
Filing date: 2021-03-19
Publication date: 2021-10-14
Also published as: CN212060852U

Abstract

A laser projector, comprising a projector body (1) and multiple casters (2) provided at the bottom of the projector body (1). The casters (2) are used for supporting the projector body (1) on a placement platform (5). The laser projector further comprises a caster fixing assembly. The bottom surface of the caster fixing assembly is fixed to the placement platform (5). The caster fixing assembly comprises a first positioning side surface (31a) and a second positioning side surface (41a) provided opposite to each other. The first positioning side surface (31a) and the second positioning side surface (41a) respectively abut against the side walls of two casters (2) of the multiple casters (2). The first positioning side surface (31a) and the second positioning side surface (41a) can prevent the projector body (1) from moving in a direction parallel to the platform surface of the placement platform (5).

Description

A laser projector

Cross-references to related applications

This application requires the priority of a Chinese patent application filed with the Chinese Patent Office on April 10, 2020 with an application number of 202020528772.3, and the title of the invention for a laser projector, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the technical field of laser display projection, and in particular to a laser projector.

Background technique

The laser projection TV includes a laser projector and a laser projection reflection screen. The image from the laser projector is projected onto the laser projection reflection screen, and then is reflected by the laser projection reflection screen to the audience.

Existing laser projectors are generally placed on a placement table. As laser projectors are getting lighter and lighter, the risk of displacement caused by touching during use is also increasing. In addition, when cleaning the laser projector or placement table , The laser projector needs to be shifted, and it needs to be accurately returned to the original position after cleaning is completed. The slight position change of the laser projector will cause a large-scale shift of the TV screen, which greatly affects the viewing experience. Currently, the laser TV industry does not have fixing and resetting technology for the above situation. Therefore, when the laser projector is reset, the customer can only rely on the customer to manually move the laser projector and carry out the screen debugging step by step. This method is complicated, time-consuming and less accurate.

Summary of the invention

The embodiment of the present application provides a laser projector, which can prevent the laser projector from shifting under the condition that the placement table is not shifted, and can quickly and accurately reset the laser projector after cleaning.

In order to achieve the above objective, an embodiment of the present application provides a laser projector, including a projector body and a plurality of casters arranged at the bottom of the projector body, and the plurality of casters are used to use the projector body Supported on the placing table, it also includes a caster fixing assembly. The bottom surface of the caster fixing assembly is used for fixing with the placing table. A positioning side surface and the second positioning side surface respectively abut against the side walls of two of the plurality of casters, and the first positioning side surface and the second positioning side surface can prevent the projector body from being parallel Move in the direction of the table surface of the placement table.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are merely present For some of the embodiments of the application, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic diagram of the structure of a laser projector according to an embodiment of the application;

2 is a schematic diagram 1 of a partial structure of a laser projector according to an embodiment of the application;

Figure 3 is a partial enlarged view of position I in Figure 2;

4 is a schematic diagram 2 of a partial structure of a laser projector according to an embodiment of the application;

FIG. 5 is a structural schematic diagram 1 of a first positioning member in a laser projector according to an embodiment of the application; FIG.

6 is a schematic diagram 2 of the structure of the first positioning member in the laser projector according to the embodiment of the application;

FIG. 7 is a schematic diagram of the installation of the casters and the first positioning member and the second positioning member in the laser projector according to the embodiment of the application;

8 is a schematic structural diagram of a third positioning member in a laser projector according to an embodiment of the application;

FIG. 9 is a schematic diagram of the installation of the casters and the third positioning member in the laser projector according to the embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying The referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; for those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood under specific circumstances.

The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, unless otherwise specified, "plurality" means two or more.

1 to 4, the embodiment of the present application provides a laser projector, including a projector body 1 and a plurality of casters 2 arranged at the bottom of the projector body 1, the casters 2 are used to support the projector body 1 On the placement table 5, the laser projector also includes a caster fixing assembly. The bottom surface of the caster fixing assembly is fixed to the placement table 5. Referring to FIG. A positioning side surface 31a and a second positioning side surface 41b respectively abut against the side walls of the two casters 2 of the plurality of casters. The first positioning side surface 31a and the second positioning side surface 41b can prevent the projector body 1 from being parallel to the placement platform 5 To ensure that the laser projector will not shift under the condition that the placement table 5 does not move; in addition, the caster fixing assembly fixed on the placement table 5 is equivalent to the position of the caster 2 of the laser projector. When the laser projector or the placement table 5 is cleaned and needs to be reset, you only need to install two of the casters 2 of the laser projector in the caster fixing assembly. There is no need to step-by-step screen debugging. This structure can ensure laser projection. The machine resets quickly and accurately.

The number of casters 2 is generally four, which are respectively set on the four corners of the projector body 1. The two casters 2 can be any two casters. For example, the two casters 2 can be casters close to the projection direction of the laser projector. It can also be casters far away from the projection direction of the laser projector. For more beautiful appearance, you can choose the casters close to the projection direction of the laser projector. In this way, the caster fixing assembly is far away from the user, and the user will not directly see the caster fixing assembly.

The caster 2 can have various shapes. For example, the caster 2 can be a prism. For another example, refer to Figure 3. For more beautiful appearance, the caster 2 can be a cylinder. In order to ensure that the hand does not slip when turning the caster 2, you can 2 is provided with a groove 21 penetrating in the axial direction on the side wall; referring to Figure 7, the first positioning side 31a and the second positioning side 41a are both arc surfaces, and the radius of the arc surface can be equal to the radius of gyration of the cylinder. It can be larger than the radius of gyration of the cylinder, because the first positioning side 31a and the second positioning side 41a must be in contact with the caster 2, and the caster 2 must also be easy to install or remove the caster fixing assembly. Therefore, if the radius of the arc surface is It is equal to the radius of gyration of the cylinder, which requires higher machining accuracy and will increase the production cost; if the radius of the arc surface is greater than the radius of gyration of the cylinder, the arc surface and the cylinder are in line contact. This structure is convenient for casters 2 It is loaded or removed, and the processing accuracy of the arc surface is relatively low. Therefore, it is preferable to have a structure in which the radius of the arc surface is larger than the radius of gyration of the cylinder.

The caster fixing assembly has a variety of achievable structures. For example, referring to Figures 2 and 7, the caster fixing assembly can include a first fixing part 3 and a second fixing part 4, and the first fixing part 3 and the second fixing part 4 The bottom surface is fixed with the placing table 5, the side wall of the first fixing member 3 forms a first positioning side surface 31a, the side wall of the second fixing member 4 forms a second positioning side surface 41a, and the two casters 2 are located on the first fixing member 3 and Between the second fixing parts 4, the first fixing part 3 and the second fixing part 4 have the same structure, because the arc surfaces of the first fixing part 3 and the second fixing part 4 respectively abut the cylindrical surface of the corresponding caster 2 Therefore, the movement of the two casters 2 along the A and B directions can be restricted. Referring to Figure 7, when the first fixing member 3 and the second fixing member 4 are used to fix the caster 2, there is no need to remove the laser projector, just fix the first fixing member 3 and the second fixing member 4 on the corresponding caster 2 respectively. It is only necessary to ensure that the directions of the installation openings of the first fixing member 3 and the second fixing member 4 are set relative to each other, and the installation is more convenient. As another example, referring to Figures 8 and 9, the caster fixing assembly may include a third fixing member 6. The bottom surface of the third fixing member 6 is fixed to the placing table 5, and the third fixing member 6 is provided with a long strip hole 61. A positioning side surface 31b and a second positioning side surface 41b are respectively the two end surfaces of the elongated hole 61, and the two casters 2 are both located in the elongated hole 61. Since the third fixing member 6 is an integral piece, the parts are relatively small. Less, installation and transportation are more convenient.

The larger the radius of the arc surface of the caster fixing assembly is, the easier it is for the caster 2 to be inserted and removed. However, the more materials required for processing the caster fixing assembly, the higher the cost. Therefore, it is preferable that the arc surface of the caster fixing assembly is larger than The gyration radius of the caster 2 is 1 to 3 mm, and the caster fixing assembly of this size can ensure the smooth installation and removal of the caster 2 with the lowest cost.

There are a variety of materials that can be used for the caster fixing components. For example, the caster fixing components can be made of metal. If the caster fixing components are made of metal, the quality of the caster fixing components is higher, and the cost is higher, and because the caster 2 is generally made of plastic Therefore, when the caster 2 and the caster fixing assembly collide, the caster 2 is easily damaged; for another example, the caster fixing assembly can be a plastic part. If the caster fixing assembly is made of plastic, the caster fixing assembly has a lower mass. The cost is low, and the caster 2 is not easily damaged. Therefore, it is preferable that the caster fixing assembly is a structure of a plastic part.

The caster fixing assembly has a variety of achievable structures. For example, referring to Figures 5 and 7, the caster fixing assembly can include a first fixing part 3 and a second fixing part 4, a first fixing part 3 and a second fixing part 4 Both can be solid arc segments. If the first fixing part 3 and the second fixing part 4 adopt solid arc segments, more materials are required for processing the first fixing part 3 and the second fixing part 4, and the cost is higher. , And the first fixing part 3 and the second fixing part 4 are not light enough, therefore, a weight-reducing cavity 32a can be provided on the first fixing part 3 and the second fixing part 4, and a grid-like reinforcing rib 33a is arranged in the weight-reducing cavity 32a This structure can not only reduce the weight of the first fixing member 3 and the second fixing member 4, save costs, but also enhance the strength of the first fixing member 3 and the second fixing member 4. The opening direction of the weight reduction cavity 32a can be various , Can be selected according to actual needs, there is no restriction here.

As another example, referring to Figure 8, the caster fixing assembly may be a third fixing member 6, and the third fixing member 6 may be a solid racetrack ring. If the third fixing member 6 adopts a solid structure, the processing of the third fixing member 6 is required There are more materials, higher cost, and the third fixing member 6 is not light enough; therefore, the third fixing member 6 can be provided with a weight-reducing cavity 32b, and a grid-like reinforcing rib 33b can be provided in the weight-reducing cavity 32b. This structure can be The weight of the third fixing member 6 is reduced, cost is saved, and the strength of the third fixing member 6 can be enhanced. The opening directions of the weight reduction cavity 32b can be selected according to actual needs, and there is no limitation here.

The caster fixing assembly can be fixed on the placement table 5 in many ways. For example, when the caster fixing assembly is the first fixing part 3 and the second fixing part 4, the first fixing part 3 and the second fixing part 4 can be screwed It is fixed on the placing table 5. If the first fixing part 3 and the second fixing part 4 are fixed on the placing table 5 by screws, a bolt hole needs to be opened on the placing table 5, which will damage the placing table 5, and install or remove the first Special tools are needed for the fixing part 3 and the second fixing part 4, and the operation is inconvenient; for another example, referring to Figures 2, 6 and 7, an adhesive layer can be provided on the bottom surface 34 of the first fixing part 3. 35. The first fixing member 3 is adhered to the placing table 5 through an adhesive layer 35, and the second fixing member 4 has the same structure as the first fixing member 3, and is also adhered to the placing table 5 through an adhesive layer. If the first fixing part 3 and the second fixing part 4 are fixed by bonding, you only need to tear off the release paper on the bonding layer, and then press the fixed caster fixing assembly to the preset position. The operation is very good. Simple, and not only will damage the placement table 5. Therefore, it is preferable that the first fixing member 3 and the second fixing member 4 are bonded on the placement table 5. It should be noted that in order to ensure a more reliable bonding, the bonding layer should be as much as possible Cover the bottom surface of the first fixing part 3 and the second fixing part 4. In the same way, when the caster fixing assembly adopts the third fixing member 6, an adhesive structure can also be adopted.

The specific steps of fixing the first fixing part 3 and the second fixing part 4 are: after the laser projector is installed, tear off the release paper of the first fixing part 3 and the second fixing part 4, and then fix the first fixing part 3 and the second fixing part 4 The parts 3 and the second fixing part 4 approach the corresponding casters 2 from both sides of the laser projector until they abut against the corresponding casters 2, then properly lift the laser projector, and then place the first fixing parts 3 and the second The two fixing pieces 4 are respectively pressed on the placing table 5, and it is ensured that the first fixing piece 3 and the second fixing piece 4 are firmly bonded to the placing table 5.

In the same way, the specific steps for fixing the third fixing part 6 are: when debugging the laser projector, the third fixing part 6 needs to be put on the casters 2, and after the laser projector is installed, tear off the adhesive of the third fixing part 6 Then, lift the laser projector appropriately, and then press the third fixing members 6 on the placement table 5 respectively, and ensure that the third fixing members 6 are firmly bonded to the placement table 5.

There are many types of bonding layer that can be selected. For example, the bonding layer can be ordinary double-sided tape. If the bonding layer uses ordinary double-sided tape, when removing the caster fixing assembly, the caster fixing assembly or the placement table 5 will The remaining glue is particularly difficult to remove. It will waste a lot of time when cleaning the residual glue, and it may cause hard objects such as nails to scratch the surface of the placement table 5, which results in a poor user experience. In another example, the adhesive layer can be easy Pull glue, if easy pull glue is used, because the pull glue has high elongation, it can be easily pulled off when removed without leaving residual glue. Therefore, it is very easy to remove the caster fixing components and avoid the surface of the placing table 5 from being damaged. Scratches, so the adhesive layer is preferably easy to pull glue.

In actual use, since there is generally a gap between the caster 2 and the first fixing part 3 or the second fixing part 4, when the laser projector is collided, the laser projector is fixed on the first fixing part 3 or the second fixing part 4 The part 4 moves slightly. Therefore, the angle of the arc surface of the first fixing part 3 and the second fixing part 4 can be equal to 180 degrees, which is smaller than the angle of the arc surface. When the caster is shifted, the arc surface The structure with an angle equal to 180 degrees can provide greater resistance to the casters, and the stability of the first fixing member 3 or the second fixing member 4 is better.

There are various shapes of the first fixing member 3 or the second fixing member 4. In an example, it may be a semi-cylinder cut off on one side of a rectangular parallelepiped, and in another example, it may be a semicircular ring, which is not limited here.

The top surface of the caster fixing assembly can be lower than the top surface of the caster 2 but higher than the bottom surface of the caster 2, or it can be flush with the top surface of the caster 2. In order to increase the contact area between the caster fixing assembly and the caster 2, the The clamping is more reliable, and a structure in which the top surface of the caster fixing assembly is flush with the top surface of the caster 2 is preferred.

Since the placement table 5 may shift, it is necessary to measure the distance between the left and right sides of the placement table 5 and the wall after the laser projector is installed and debugged, and remind the customer to record it in a place that is not easy to lose (such as a blank space in the manual, or record Paste the label on the back of the laser projector). If the placement table 5 is displaced, the placement table 5 needs to be reset according to the recorded data, so as to ensure that the laser projector does not move or reset quickly.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily conceive of changes or substitutions within the technical scope disclosed in this application, which shall cover Within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A laser projector includes a projector body and a plurality of casters arranged at the bottom of the projector body, the casters are used to support the projector body on a placing table, and are characterized in that:

It also includes a caster fixing assembly, and the bottom surface of the caster fixing assembly is used for fixing with the placing table;

The caster fixing assembly includes a first positioning side surface and a second positioning side surface disposed oppositely, the first positioning side surface and the second positioning side surface respectively abutting against the side walls of two of the plurality of casters, The first positioning side surface and the second positioning side surface can prevent the projector body from moving in a direction parallel to the table surface of the placing table.
The laser projector of claim 1, wherein:

The caster is a cylinder, the first positioning side surface and the second positioning side surface are both arc surfaces, and the radius of the arc surface is greater than the radius of gyration of the cylinder.
The laser projector according to claim 2, wherein:

The caster fixing assembly includes a first fixing part and a second fixing part. The bottom surfaces of the first fixing part and the second fixing part are both used for fixing with the placing table, and the side wall of the first fixing part The first positioning side surface is formed, the side wall of the second fixing member forms the second positioning side surface, and the two casters are both located between the first fixing member and the second fixing member.
The laser projector according to claim 2, wherein:

The caster fixing assembly includes a third fixing member, the bottom surface of the third fixing member is used for fixing with the placing table, the third fixing member is provided with an elongated hole, the first positioning side surface and the The second positioning side surfaces are respectively two end surfaces of the elongated hole, and the two casters are both located in the elongated hole.
The laser projector according to claim 2, wherein the radius of the arc surface is larger than the radius of gyration of the cylinder by 1 to 3 mm.
The laser projector according to any one of claims 1 to 5, wherein the caster fixing assembly is a plastic part.
7. The laser projector according to claim 6, wherein a weight reduction cavity is provided on the caster fixing assembly, and a grid-like reinforcing rib is provided in the weight reduction cavity.
The laser projector according to any one of claims 1-5, wherein:

The bottom surface of the caster fixing assembly is provided with an adhesive layer, and the caster fixing assembly is adhered to the placing table through the adhesive layer.
8. The laser projector according to claim 8, wherein the adhesive layer is easy-pull glue.
The laser projector of claim 3, wherein the angle of the arc surface is 180 degrees.
The laser projector according to any one of claims 1 to 5, wherein the top surface of the caster fixing assembly is flush with the top surface of the caster.