Train vehicle movie screen device

Abstract

The present invention relates to a movie screen device for a train vehicle, and an object of the present invention is to minimize the degree of vibration generated during train operation being transmitted to an LED screen, thereby preventing malfunction of the screen device while improving movie viewing satisfaction of passengers riding the train. To this end, the present invention provides a screen device provided in a passenger compartment of a train vehicle (100) to provide a movie screening service, characterized by comprising: a screen body (10) provided with LED screens (11, 12) exhibiting images in a symmetrical form at the front and back, respectively; a speaker (20) provided at a lower portion of the screen body (10); and a damper (30) provided at a lower portion of the speaker (20) to reduce vibration of a train floor being transmitted to the speaker (20) and the screen body (10).

Description

Technical Field

[0001] This invention relates to a movie projection screen device for train vehicles, and more specifically, to a train vehicle equipped with a movie projection screen device in a passenger compartment for providing movie viewing services to passengers using the train vehicle. Background Technology

[0002] In recent years, CD players have been installed in ordinary cars to watch videos and enjoy music. In large buses and other similar vehicles, televisions and CD players are installed on the ceiling adjacent to the driver's seat so that passengers can watch videos and enjoy music.

[0003] However, it is not possible to enjoy large-screen images like those in movies in ordinary cars or large buses, thus presenting difficulties in movie viewing.

[0004] On the other hand, in the case of trains, large screens are installed to overcome such limitations, thereby avoiding a boring journey by watching regular movies.

[0005] However, in the aforementioned prior art, the screen is in the form of a thin film, which cannot achieve a stable fixed state when unfolded from the rolled-up storage state. Therefore, the screen is prone to shaking due to the shaking of the train or the wind from the air conditioning or heater inside the train, and thus the screen cannot maintain a flat surface, resulting in the problem of unstable image display.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Korean Patent Registration No. 1216280 (Registered on December 20, 2012)

[0009] Patent Document 2: Korean Utility Model Registration No. 417264 (Registered May 18, 2006) Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] This invention was developed to improve upon the problems in the prior art described above. The purpose of this invention is to install an LED screen in the passenger compartment to provide a more stable image, thereby providing a satisfactory movie viewing service for long-distance travelers.

[0012] Methods for solving problems

[0013] To achieve the above objectives, the present invention provides a screen device for providing movie projection services, which is installed in the center of a passenger compartment of a train vehicle. The device is characterized by comprising: a screen body having LED screens for displaying images symmetrically arranged on the front and back; a speaker disposed at the lower part of the screen body; and a damper disposed at the lower part of the speaker to reduce the transmission of vibrations from the train floor to the speaker and the screen body.

[0014] Invention Effects

[0015] The movie projection screen device for train vehicles of the present invention has the following effects: it can minimize the degree to which vibrations generated during train operation are transmitted to the LED screen, thereby preventing screen device malfunctions and improving the movie viewing satisfaction of passengers using the train. Attached Figure Description

[0016] Figure 1 This is a side cross-sectional view of the interior of a train vehicle equipped with an LED screen device according to an embodiment of the present invention.

[0017] Figure 2 This is a top cross-sectional view of the interior of a train equipped with the LED screen device of the present invention.

[0018] Figure 3 This is a front structural view of the LED screen device of the present invention.

[0019] Figure 4 yes Figure 3 An enlarged view of part A.

[0020] Figure 5 This is a detailed structural diagram of the internal structure of the damper in this invention.

[0021] Figure 6 This is a diagram of the lower structure of the damper according to another embodiment of the present invention.

[0022] Figure 7 This is a detailed cross-sectional view of the damping ball mounting section according to another embodiment of the present invention.

[0023] Figure 8 This is an enlarged cross-sectional view of the damping ball according to another embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures

[0025] 10: Main screen body; 11, 12: LED screen

[0026] 20: Loudspeaker; 30: Damper

[0027] 40: Support leg; 50: Base plate

[0028] 100: Train vehicle; 110: Passenger shelving

[0029] 111: Cushioning rubber; 120: Passenger car seats

[0030] 130: Channel f: Working fluid Detailed Implementation

[0031] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] The embodiments of the present invention can be modified into various forms, and the scope of the present invention is not limited to the embodiments described in detail below. These embodiments are provided to illustrate the present invention more completely to those skilled in the art.

[0033] Therefore, the shapes of the constituent elements in the accompanying drawings may be shown enlarged for clarity. The same reference numerals may be used for the same structures in different drawings. Furthermore, detailed descriptions of the functions and structures of known technologies that may obscure the essence of the invention may be omitted.

[0034] First, refer to Figures 1 to 5 The structure of a movie projection screen device for train vehicles according to an embodiment of the present invention will be described.

[0035] In this embodiment, the movie projection screen device is located in the center of the passenger compartment of the train car 100 to provide movie projection services. The movie projection screen device includes: a screen body 10, which has LED screens 11 and 12 symmetrically arranged on the front and back respectively to display images; a speaker 20, which is located at the lower part of the screen body 10; and a damper 30, which is located at the lower part of the speaker 20 to reduce the transmission of vibrations from the train floor to the speaker 20 and the screen body 10.

[0036] At this time, the screen body 10 has passageways 130 on both sides for passengers to move. The passenger shelf 110 located at the upper part of the passageway 130 supports the upper ends of the screen body 10 on both sides. The passenger shelf 110 has cushioning rubber 111 for cushioning and supporting the screen body 10.

[0037] In particular, such as Figure 4 As shown, a support pin 10a protrudes from the side wall of the screen body 10 and is embedded in the aforementioned buffer rubber 111. Inside the buffer rubber 111, a buffer spring 10' passes through the support pin 10a. An annular elastic support wing 10b is integrally formed in the middle section of the support pin 10a to provide elastic support for the buffer spring 10'. This structure of the support pin 10a and buffer spring 10' reduces and absorbs a significant portion of the vibration at the upper end of the screen body 10.

[0038] On the other hand, the damper 30 is filled with working fluid f inside, and an aluminum weight body 31 is provided inside the damper 30 in a way that can be raised and lowered. In order to guide the raising and lowering of the weight body 31, guide rods 32 are provided vertically on both sides. An upper spring 33 and a lower spring 34 are respectively provided on the upper and lower parts of the weight body 31 to elastically support the raising and lowering movement of the weight body 31.

[0039] In order to maintain viscosity and prevent oxidation of aluminum weight body 31, the working fluid f is preferably composed of a mixture of 40-65% by weight of mineral oil, 15-40% by weight of paraffin, 10-25% by weight of anhydrous ethanol, 1-15% by weight of glycerol, and 1-10% by weight of polyvinyl alcohol.

[0040] By providing the movie projection screen device for train vehicles of the present invention with such a structure, the following effects can be achieved.

[0041] In this embodiment, the main screen 10 is located in the center of the train vehicle 100, with LED screens 11 and 12 for playing images on both sides of the middle where a speaker 20 is also provided, so that passengers sitting in the front and back passenger seats 120 can watch the movie at the same time.

[0042] In addition, the upper part of the screen body 10 is supported by the passenger rack 110, and the lower part is controlled by the damper 30 to prevent the swaying or even sharp vibration that occurs during train operation from being transmitted to the screen body 10.

[0043] That is, the damper 30 controls the vertical vibration transmitted from the bottom of the train to the screen body 10. At this time, the vertical vibration is transmitted to the damper 30, so that the weight body 31 set inside moves up and down along the guide rod 32, and achieves rapid buffering through the elastic action of the upper spring 33 and the lower spring 34, and rapidly controls the vertical movement of the weight body 31 through the friction between it and the working fluid f.

[0044] In particular, in addition to mineral oil which maintains a certain viscosity, the working fluid f also contains paraffin wax, which will act as a catalyst for the mineral oil. Anhydrous ethanol prevents foaming through friction with the weight body 31. Glycerin and polyvinyl alcohol prevent the working fluid f from deteriorating and prevent oxidation on the surface of the weight body 32, respectively.

[0045] Therefore, the movie projection screen device for train vehicles of the present invention has the following effects: it can minimize the degree to which vibrations generated during train operation are transmitted to the LED screen, thereby preventing screen device malfunctions and improving the movie viewing satisfaction of passengers using the train.

[0046] on the other hand, Figures 6 to 8 The structure for controlling horizontal vibration according to another embodiment of the present invention is shown. A base plate 50 is provided at the lower part of the damper 30. The base plate 50 has support legs 40 made of compressed rubber material that support both sides of the damper 30. A damping ball 35 of a certain weight for controlling horizontal vibration is movably connected to and supported at the lower part of the damper 30 by a wire 36. A curved groove 51 is formed on the base plate. Fine hairs 52 made of fiber or artificial hair material are provided at the peripheral edge of the curved groove 51 for rubbing against the moving damping ball 35.

[0047] In addition, a friction coating 35a is formed on the surface of the damping ball 35 to increase the friction between it and the fine hair 52. The friction coating 35a is preferably composed of 30-55% by weight of silicone resin, 20-40% by weight of polyvinyl acetal, 10-30% by weight of sodium chloride, 10-20% by weight of barium silicate, 1-15% by weight of benzyl benzoate, 1-10% by weight of ascorbic acid, and 1-10% by weight of metallocene polyethylene.

[0048] With this structure, the vibration of the screen body 10 in the horizontal direction can be controlled by the movement of a damping ball 35 of a certain weight.

[0049] That is, when the train floor vibrates horizontally, the damping ball 35 suspended on the wire 36 moves simultaneously to control the vibration. In the event of a sudden vibration, it contacts the fine hairs 52 of the curved groove 51 on the base plate 50 to limit the movement distance.

[0050] Specifically, a friction coating 35a is formed on the surface of the damping ball 35, thereby increasing the frictional force between it and the fine hairs 52. Polyvinyl acetal mixed in the friction coating 35a maintains elasticity through its catalytic function on the silicone resin. Sodium chloride prevents discoloration of the coating through its fire-resistant properties, and barium silicate enhances the adhesion and durability of the friction coating 35a. Furthermore, the added benzyl benzoate increases the coating density by increasing the bonding force between the various components, while ascorbic acid and metallocene polyethylene respectively prevent surface cracking and oxidation through their antioxidant properties.

[0051] Furthermore, while specific embodiments of the present invention have been described and illustrated above, it is obvious to those skilled in the art that modifications can be made to the screen device structure of the present invention.

[0052] For example, the above embodiments have described and illustrated the configuration of placing the speaker at the lower part of the screen body, but as needed, additional speakers may also be placed on the ceiling of the train passenger car.

[0053] Therefore, such modified embodiments should not be understood solely from the technical concept or scope of the present invention, but should be included within the appended claims.

Claims

1. A movie screen device for a train vehicle, which is provided in the center of a passenger compartment of a train vehicle (100) to provide a movie service, characterized in that, The train vehicle movie screen device includes: a screen body (10) provided with LED screens (11, 12) for displaying images in symmetrical forms on the front and back surfaces; a speaker (20) provided at the lower portion of the screen body (10); a damper (30) provided at the lower portion of the speaker (20) and filled with a working fluid (f) to reduce vibration transmission from the train floor to the speaker (20) and the screen body (10); an aluminum weight (31) provided in the damper (30) filled with the working fluid (f) to be able to be lifted and lowered; a guide rod (32) provided vertically at both sides of the damper (30) to guide the lifting and lowering of the weight (31); and upper and lower springs (33, 34) provided at the upper and lower portions of the weight (31) to elastically support the lifting and lowering of the weight (31), a bottom plate (50) provided at the lower portion of the damper (30) and having support legs (40) to support both sides of the damper (30), a damping ball (35) for controlling horizontal vibration being movably connected and supported by a wire (36) at the lower portion of the damper (30), a curved groove (51) being formed in the bottom plate (50), fine hairs (52) for rubbing against the damping ball (35) being formed at the peripheral edge of the curved groove (51), and a friction coating (35a) for increasing the friction between the fine hairs (52) being formed on the surface of the damping ball (35).

2. The train vehicle movie screen device according to claim 1, wherein the screen body (10) is provided with passages (130) at both sides, and a passenger shelf (110) provided at the upper portion of the passages (130) supports both sides of the upper end of the screen body (10).

3. The train vehicle movie screen device according to claim 2, wherein a buffer rubber (111) for buffering and supporting the screen body (10) is formed in the passenger shelf (110), a support pin (10a) protruding from the side surface of the screen body (10) is embedded in the buffer rubber (111), a buffer spring (10') is provided in the buffer rubber (111) to be penetrated by the support pin (10a), and a ring-shaped elastic support wing (10b) is integrally formed at the support pin (10a) to be elastically supported by the buffer spring (10').

4. The train vehicle movie screen device according to claim 1, wherein the working fluid (f) is composed of a mixture of mineral oil, paraffin, anhydrous ethanol, glycerin, and polyvinyl alcohol.

5. The train vehicle movie screen device according to claim 1, wherein the friction coating (35a) is composed of a mixture of silicone, polyvinyl acetal, sodium chloride, barium silicate, benzyl benzoate, ascorbic acid, and metallocene polyethylene.

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