TWI644159B - Projector and light pipe fixing device thereof - Google Patents

Abstract

The invention discloses a projector and a light machine fixing device thereof, and belongs to the field of light guide. The device comprises: a light-machine covering (1), which has a cavity for receiving the light-machine (4), and has a first end surface (11), four sides, and a first opening (12) at the periphery of the cavity. The first opening (12) is used for loading the optical machine (4), and the first end surface (11) is provided with a second opening (11a). The area of the second opening (11a) is smaller than the area of the first end surface (11). . The clamping element (2) includes a clamping portion and a connecting portion at an end of the clamping portion. The clamping portion surrounds and holds the optical machine cover (1), and the connecting portion is used for fixed connection with the projector casing. The baffle (3) is used to cooperate with the first opening (12), and the area of the baffle (3) is larger than the area of the first opening (12).

Description

Projector and its optical-mechanical fixing device

The invention relates to the field of light guiding, and in particular to a projector and a fixing device for the same.

A projector is a device that can project an image or video onto the screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play the corresponding video signal to achieve a large screen projection display. Way to provide viewers with excellent presentation and visual effects. With the development of electronic technology, projectors are widely used in education, business and home. According to the different working principles of the projector, it can be divided into cathode ray tube projector (CRT), liquid crystal projector (LCD) and digital optical processing projector (DLP). Among them, the imaging principle of the digital optical processor projector is: the light emitted by the optics is transmitted to the digital microscope in the open state through multiple optical elements and converted into imaging optics. Large screen and provide sufficient brightness.

The optical element light machine (Light Pipe, LP for short) in a DLP projector needs to be fixed. When the light machine runs, it will cause abnormal picture and lower contrast, which will affect the imaging quality. Although there are some devices for fixing the light machine in the prior art, However, there are problems such as complex fixing methods, insecure fixing, long process cycles or high costs. For example, FIG. 1 is a schematic structural diagram of an optical-mechanical fixing device in the prior art. As shown in FIG. 1, the device includes a light machine cover 1 ′ and a cover 5. The rear end of the light machine cover 1 ′ is provided with an opening 15, and the light machine cover is provided with a plurality of dispensing portions 16. When the light machine 4 needs to be fixed, the light machine 4 is loaded from the opening 15 of the light machine cover 1 ', and the UV glue is dispensed at the portion where the dispensing portion 16 and the light machine cover 1' come into contact. After the dispensing process, the cover 5 is then installed at the opening 15 of the light machine cover 1 'to the light machine cover 1', covering the end of the light machine cover 1 ', and finally using The holding element holds the optical machine cover 1 'and is then placed on the DLP projector housing. Although the structure of the fixing device is simple, due to the long cycle of the UV glue dispensing process, the quality is unstable, and the LP position varies with the drop of the vibration. Secondly, when the amount of UV dispensing is too large, it will interfere with the external clamping component, causing Insufficient fixing and other problems; In addition, due to the glue-free fixing method of the cover 5, the cover 5 has a risk of backwardness, or the cover 5 may be deformed, which may cause the light path to be blocked.

According to an aspect of the present invention, a projector light machine fixing device is provided. The device includes: a light machine cover, which has a cavity for accommodating the light machine, and has a first end surface, four edges on the periphery of the cavity. The side surfaces and the first opening, the direction of the central axis of the optical machine is the first direction, and the first end surface and the end surface where the first opening is located are all in a second direction perpendicular to the first direction, the Four sides are along the first direction, the first opening is used to install the optical machine, the first end surface is provided with a second opening, and the The second opening has a regular geometric shape, and the geometric center of the second opening is in the first direction. The area of the second opening is smaller than the area of the first end surface. The clamping element includes a clamping portion and The connecting part at the end of the clamping part, the clamping part surrounds and clamps the optical machine cover, the connecting part is used for fixed connection with the projector housing; the baffle, which is used for the baffle To cooperate with the first opening, the baffle is provided with a third opening, the geometric center of the third opening is in the first direction, and the area of the third opening is smaller than the area of the first opening The baffle includes a baffle body and a first pressing portion and a fourth clamping portion protruding from the baffle body, and the first pressing portion is used to press the optical machine cover, Wherein, the baffle body abuts the optical machine along the first direction at the first opening, and the fourth clamping portion is embedded in the optical machine cover to along the second direction Abut the light machine.

Preferably, the baffle plate further includes a first latching structure and a threaded hole, and the first latching structure and the threaded hole are fixedly connected to the projector housing, respectively.

Preferably, a second buckle structure is provided at the first opening of the optomechanical cover, and a third buckle structure is provided at the end of the baffle plate to cooperate with the second buckle structure.

Preferably, the clamping portion includes a first clamping portion, a second clamping portion, and a third clamping portion, and the first clamping portion and the third clamping portion are located in the second clamping portion. On the opposite sides, the first clamping portion and the third clamping portion both clamp the optical machine cover in the second direction, and the left and right ends of the third clamping portion are respectively A third clamping portion is provided, and the urging direction of the third clamping portion is the same as the urging direction of the third clamping portion.

Preferably, the optical-mechanical cover is further provided with two second pressing portions, and the two second pressing portions are respectively located on an upper side and a lower side of the four sides, and the two The second pressing portion presses the optical machine in a third direction perpendicular to the first direction and the second direction, respectively; the second clamping portion is provided with a second clamping portion, and the first Two clamping portions press the optical machine cover in the third direction; a first clamping portion is provided on the first clamping portion, and the first clamping portion abuts in the second direction. The optical machine cover is pressed.

Preferably, the first clamping portion, the second clamping portion and / or the third clamping portion adopt an elastic element.

Preferably, the connection portion includes a first connection portion and a second connection portion, the first connection portion is fixedly connected to the first clamping portion, and the second connection portion is fixed to the third clamping portion connection.

Preferably, the first connecting portion is provided with a threaded hole, and the second connecting portion is provided with a fourth buckle structure.

Preferably, the fourth clamping portion adopts an elastic element.

According to another aspect of the present invention, a projector is provided. The projector includes the projector optical-machine fixing device in the above technical solution, and the optical machine is located in the cavity of the optical-machine covering.

The technical solution provided by the embodiments of the present invention has the following beneficial effects: the projector optical machine fixing device and the projector provided by the embodiments of the present invention adopt an end portion The optical-mechanical cover of the opening structure is used in combination with a clamping element capable of holding the optical-mechanical cover and fixing it on the projector housing, and a baffle covering the end opening of the optical-mechanical cover. Under the premise of no need to dispense the optical machine and the optical machine cover parts, the running problem of the optical machine is solved, and the fixing is stronger. At the same time, the problems of long dispensing process cycle and poor operating elasticity are solved. In addition, there is no need to wrap the covering body at the rear of the optical machine cover, thereby avoiding the problem of light leakage caused by incomplete light shielding at the rear of the optical machine, thereby improving the picture quality of the projector. In addition, the projector optical machine fixing device provided by the embodiment of the present invention also has the advantages of simple structure, convenient use, and low cost.

In order to have a better understanding of the above and other aspects of the present invention, the following specific examples are described in detail below in conjunction with the accompanying drawings:

1, 1’‧‧‧ Optical machine cover

2‧‧‧ clamping element

3‧‧‧ bezel

4‧‧‧ Optical Machine

5‧‧‧ cover

11‧‧‧first end face

11a‧‧‧Second opening

12‧‧‧ the first opening

12a‧‧‧face

13‧‧‧Second snap structure

14‧‧‧Second pressure section

15‧‧‧ opening

16‧‧‧ Dispensing Department

21‧‧‧First clamping section

21a‧‧‧First clamping section

22‧‧‧Second clamping section

22a‧‧‧Second clamping part

23‧‧‧ the third clamping part

23a, 23b ‧‧‧ the third clamping part

24‧‧‧First connecting section

24a‧‧‧Threaded hole

25‧‧‧Second connection section

25a‧‧‧Fourth buckle structure

31‧‧‧ third opening

32‧‧‧The first pressing part

33‧‧‧First buckle structure

34‧‧‧Threaded hole

35‧‧‧The third buckle structure

36‧‧‧ Fourth clamping section

FIG. 1 is a schematic structural diagram of a projector optical machine fixing device in the prior art; FIG. 2 is a schematic structural diagram of an optical machine cover in the projector optical machine fixing device according to an embodiment of the present invention; and FIG. The schematic diagram of the structure of the optical machine cover in the projector optical machine fixing device provided by the embodiment of the invention; FIG. 4 is a schematic diagram of the structure of the clamping element in the projector optical machine fixing device provided by the embodiment of the invention; It is a schematic structural diagram of a baffle in a projector optical machine fixing device according to an embodiment of the present invention; FIG. 6 is an exploded schematic diagram of the overall structure of the projector optical machine fixing device and the optical machine assembly provided by the embodiment of the present invention; FIG. 7 is the projector optical machine fixing device provided on the projector housing according to the embodiment of the present invention State diagram.

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are merely Some embodiments of the present invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The projector optical machine fixing device according to the embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a schematic structural diagram of a light machine cover in a projector light machine fixing device according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of a light machine cover in a projector light machine fixing device according to an embodiment of the present invention. FIG. 4 is a schematic structural diagram of a clamping element in a projector optical machine fixing device according to an embodiment of the present invention. FIG. 5 is a schematic structural diagram of a baffle in a projector optical machine fixing device according to an embodiment of the present invention.

The x-axis direction is a first direction, the y-axis direction is a second direction, and the z-axis direction is a third direction.

As shown in FIG. 2 to FIG. 5, the projector optical machine fixing device provided by the embodiment of the present invention mainly includes an optical machine cover 1, a clamping element 2, and a baffle 3.

Specifically, as shown in FIG. 2 and FIG. 3, the optical-mechanical cover 1 has a cavity for receiving the optical machine 4, and has a first end surface 11, four side surfaces, and a first opening 12 on the periphery of the cavity. The direction of the central axis of the optical machine 4 is the x-axis. The end surface 12a where the first end surface 11 and the first opening 12 are located is along the y axis perpendicular to the x axis. The four sides are along the x axis. Machine 4, the first end face 11 is provided with a second opening 11a, the second opening 11a is a regular geometric shape, such as a square, a circle, a regular hexagon, etc., and the geometric center of the first opening 11a is on the x-axis for providing The path of light emitted by the optical machine 4 in the cavity is designed according to the size of the opening area. The geometric center of the second opening 11a is on the x-axis, and the area of the second opening 11a is smaller than the area of the first end surface 11.

The clamping element 2 includes a clamping portion and a connecting portion at an end of the clamping portion. The clamping portion surrounds and clamps the optical machine cover 1. The connecting portion is used for fixed connection with the projector casing.

As shown in FIG. 5, the projector optical machine fixing device according to the embodiment of the present invention further includes a baffle 3. The baffle 3 is configured to cooperate with the first opening 12. The baffle 3 is provided with a third opening 31 and a third opening. The geometric center of 31 is on the x-axis, the area of the third opening 31 is smaller than the area of the first opening 12, and the area of the baffle 3 is larger than the area of the first opening 12. The baffle 3 includes a baffle body and a first pressing portion 32 and a fourth clamping portion 36 protruding from the baffle body. The first pressing portion 32 is used to press the light machine cover 1. The baffle body abuts the optical machine 4 along the x-axis direction at the first opening 12, and the fourth clamping portion 36 is embedded in the optical machine cover 1 to abut the optical machine 4 along the y-axis direction.

The baffle 3 further includes a first latching structure 33 and a screw hole 34, and the first latching structure 33 and the screw hole 34 are fixedly connected to the projector casing, respectively.

Preferably, the optical-mechanical cover 1 is provided with a second fastening structure 13 at the first opening 12, and an end of the baffle 3 is further provided with a third fastening structure 35 that cooperates with the second fastening structure 13. The second buckle structure 13 may be a bayonet, and the bayonet may be assembled with a corresponding buckle provided on the projector housing, so as to fix the clamping element 2 on the projector housing. In addition, the third buckle structure 35 may also be a buckle, which can be assembled with a corresponding bayonet provided on the projector housing, so as to fix the clamping element 2 on the projector housing.

Preferably, the end of the baffle plate 3 is further provided with a fourth clamping portion 36 located at the left end of the baffle plate 3. The fourth clamping portion 36 abuts the calender cover 1 along the y-axis. The fourth clamping portion 36 Use elastic elements, such as springs.

In the prior art, the optomechanical cover has a structure with an opening at the tail, and a cover needs to be installed at the open end, and the optomechanical in the cavity and the cover and the optomechanical cover are fixed with UV glue. Dispensing has problems such as unstable quality and long process cycles. For example, when an external force (such as vibration or drop) is applied to the outer part of the optical machine cover, the position of the optical machine will mutate or run, which will cause the screen of the projector. Problems such as abnormalities, in addition, when the dispensing amount is improper, it will also cause interference with the clamping member, and because the cover is closed without opening the end of the optical machine cover, the position where the cover is positioned will change. For example, backward or misaligned, it is easy to block the light, etc. The problem will also affect the picture quality of the projector. In the optical-mechanical fixing device provided in the embodiment of the present invention, one end of the optical-mechanical cover 1 is provided with a completely open structure, which is used to install the optical-machine 4 into the optical-machine cover 1 and close the closed another with a partial opening. One end is inserted into the projector housing inwardly as the tail of the light machine cover 1, and the tail of the light machine cover 1 is integrated with other parts of the light machine cover 1, which avoids the use of the tail cover and has complete The other end of the opening faces outward, and a baffle 3 is installed at the end opening, and it is used in conjunction with a clamping element 2 that can surround and hold the optical machine cover 1 to achieve effective fixation of the optical machine and eliminate The dispensing process is avoided, avoiding problems such as long-term dispensing baking operations, prone to movement of the light machine and abnormal projection screen caused by cover changes.

Preferably, as shown in FIG. 4, the holding portion includes a first holding portion 21, a second holding portion 22, and a third holding portion 23, and the first holding portion 21 and the third holding portion 23 are located at the first The two opposite sides of the two clamping portions 22, the first clamping portion 21 and the third clamping portion 23 both clamp the optical machine cover 1 along the y-axis, and the left and right ends of the third clamping portion 23 are provided with first and second ends respectively. The urging directions of the three clamping portions 23 a and 23 b and the third compressing portions 23 a and 23 b are the same as those of the third clamping portion 23.

Preferably, the third clamping portions 23a, 23b and the second clamping portion 22a and / or the first clamping portion 21a described below may be entirely or partially made of elastic elements. Such a structural arrangement can enable the clamping unit 2 to achieve effective fixation of the optical machine cover 1 in which the optical machine 4 is housed, and fixation of the optical machine.

Preferably, the optical-mechanical cover 1 is further provided with two second pressing portions 14, and the two second pressing portions 14 are respectively located on an upper side and a lower side of the four sides. The two second pressing portions 14 abut the calender 4 in the z-axis directions perpendicular to the x-axis direction and the y-axis direction, respectively; the second clamping portion 22 is provided with a second clamping portion 22a, and the second clamping portion 22a presses the light machine cover 1 along the z axis; the first clamping part 21 is provided with a first clamping part 21a, and the first clamping part 21a presses the light machine cover 1 along the y axis.

Preferably, the connection portion includes a first connection portion 24 and a second connection portion 25. The first connection portion 24 is fixedly connected to the first clamping portion 21, and the second connection portion 25 is fixedly connected to the third clamping portion 23. After the clamping unit 2 clamps and fixes the optical machine cover 1 with the optical machine, the first connecting portion 24 and the second connecting portion 25 are used to fix the clamping unit 2 on the projector housing. The first connection portion 24 and the second connection portion 25 can be fixed to the projector housing in various ways, as long as the purpose of fixing is achieved, for example, screw connection, snap connection, welding, etc. Moreover, the embodiments of the present invention are not limited thereto.

Preferably, the first connecting portion 24 is provided with a threaded hole 24a, and the first connecting portion 24 can be fixedly connected to a corresponding portion of the projector housing by screws or bolts and the threaded hole 24a. The second connecting portion 25 is provided with a fourth buckle structure 25a. The buckle structure 25a is a bayonet, and the bayonet can be assembled with a corresponding buckle provided on the projector housing, so as to fix the clamping element 2 on the bayonet. On the projector case.

Preferably, the first connecting portion 24 and the first clamping portion 21 are integrally formed, and the second connecting portion 25 and the third clamping portion 23 are integrally formed. Such a mechanism design can simplify the manufacturing process, thereby reducing manufacturing costs, and has an excellent shape.

All the above-mentioned optional technical solutions may be used in any combination to form optional embodiments of the present invention, which are not described in detail here.

FIG. 5 is a schematic structural diagram of a baffle in a projector optical machine fixing device according to an embodiment of the present invention. FIG. 6 is an exploded schematic diagram of the overall structure of the projector optical-machine fixing device and the optical-machine assembly provided by the embodiment of the present invention. FIG. 7 is a schematic diagram of a state in which a projector optical machine fixing device according to an embodiment of the present invention is installed on a projector casing.

As shown in FIG. 5 to FIG. 7, in an embodiment, the process of using the projector optical machine fixing device provided by the embodiment of the present invention is as follows: First, the optical machine 4 is passed through the first opening of the optical machine cover 1. 12 Load the cavity of the light machine cover 1 to complete the light machine loading process; then, mount the clamping element 2 to the outside of the light machine cover 1 and install the clamping element 2 on the light machine cover On the component 1, the clamping process of the optical machine cover 1 by the clamping element 2 is completed, and then the clamping element 2 and the optical machine containing the optical machine 4 are accommodated through the first connecting portion 24 and the second connecting portion 25. The cover 1 is fixed to the projector housing; finally, the fourth clamping portion 36 is applied to the light machine cover 1 and fixed to the projector housing through the screw holes 34 and the third buckling structure 35. This completes the fixation of the entire structure.

It should be noted that the installation method or the fixing order of the above-mentioned use process of the projector optical fixing device provided by the embodiment of the present invention is not limited to this, and may be different according to different situations, that is, it can be changed as long as it can be completed The fixing function of the optical-mechanical fixing device may be sufficient.

An embodiment of the present invention further provides a projector. The projector includes any one of the above-mentioned projector optical-mechanical fixing devices, and the optical machine 4 is located in the cavity of the optical-machine covering 1.

In summary, the projector optical machine fixing device and the projector according to the embodiments of the present invention adopt an optical machine cover with an open end structure, and can hold the optical machine cover and fix it to the projector casing. The clamping element on the body and the baffle covering the opening at the end of the optical machine cover are used together to solve the running problem of the optical machine without the need to dispense the optical machine and the optical machine cover. The fixing is stronger, and at the same time, the problems of long dispensing process cycle and poor operation elasticity are solved. In addition, there is no need to wrap the covering body at the rear of the optical machine cover, thereby avoiding the problem of light leakage caused by incomplete light shielding at the rear of the optical machine, thereby improving the picture quality of the projector. In addition, the projector optical machine fixing device provided by the embodiment of the present invention also has the advantages of simple structure, convenient use, and low cost.

In summary, although the present invention has been disclosed as above with the embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (10)

A fixing device for a projector light machine, the device comprises: a light machine covering member, which has a cavity for accommodating the light machine, and has a first end surface, four sides, and a first opening on the periphery of the cavity. The direction of the central axis of the optical machine is a first direction, and the first end surface and the end surface where the first opening is located are all in a second direction perpendicular to the first direction, and the four sides are in the first direction. The first opening is used for loading the optical machine, the first end surface is provided with a second opening, the second opening is a regular geometry, and the geometric center of the second opening is on the first side Upward, the area of the second opening is smaller than the area of the first end surface, wherein the optical machine cover is also provided with two second pressing portions, and the two second pressing portions are respectively located at The upper side and the lower side of the four sides, the two second pressing portions press the optical machine in a third direction perpendicular to the first direction and the second direction, respectively; Element including a clamping portion and a connecting portion at an end of the clamping portion, the clamping portion surrounding The optical machine cover is clamped, the connecting portion is used for fixed connection with the projector housing; and a baffle is used to cooperate with the first opening, and the baffle is provided with a third Opening, the geometric center of the third opening is in the first direction, the area of the third opening is smaller than the area of the first opening, and the area of the baffle is larger than the area of the first opening, so The baffle includes a baffle body and a first pressing portion and a fourth clamping portion protruding from the baffle body. The first pressing portion is used to press the optical machine cover, wherein, The baffle body abuts the optical machine in the first direction at the first opening, and the fourth clamping portion is embedded in the optical machine cover to abut in the second direction The light machine. According to the first scope of the patent application, the projector light machine fixing device, wherein the baffle further includes a first buckle structure and a threaded hole, and the first buckle structure and the threaded hole are respectively connected with the projection. The casing is fixedly connected. According to the item 1 of the scope of the patent application, the projector light machine fixing device, wherein the light machine cover is provided with a second snap structure at the first opening, and the baffle is also provided with the The third buckle structure cooperates with the second buckle structure. According to the first aspect of the patent application scope of the invention, the clamping device includes a first clamping portion, a second clamping portion, and a third clamping portion. The third clamping portion is located on two opposite sides of the second clamping portion, and the first clamping portion and the third clamping portion respectively clamp the optical machine package along the second direction. For the covering member, third clamping portions are respectively provided at the left and right ends of the third clamping portion, and the direction of the force applied by the third clamping portion is the same as that of the third clamping portion. According to the fourth aspect of the patent application scope, the projector optical machine fixing device, wherein the second clamping portion is provided with a second clamping portion, and the second clamping portion is pressed against the third direction Light machine cover; a first clamping portion is provided on the first clamping portion, and the first clamping portion presses the light machine cover in the second direction. According to the fifth aspect of the patent application scope, the projector optical machine fixing device, wherein the first clamping portion, the second clamping portion, and / or the third clamping portion adopt an elastic element. According to the first aspect of the scope of the patent application, the projector optical machine fixing device, wherein the connection portion includes a first connection portion and a second connection portion, the first connection portion is fixedly connected to the first clamping portion, The second connection portion is fixedly connected to the third clamping portion. According to the sixth aspect of the patent application scope, the projector optical machine fixing device, wherein the first connecting portion is provided with a threaded hole, and the second connecting portion is provided with a fourth buckle structure. According to the projector optical machine fixing device according to item 1 of the scope of patent application, wherein the fourth clamping portion is an elastic element. A projector includes the projector optical-mechanical fixing device according to any one of items 1 to 9 of the scope of patent application, and the optical machine is located in the cavity of the optical-mechanical cover.