Telescopic platform and projection equipment

Abstract

The utility model relates to the technical field of laser televisions, and provides a telescopic platform and projection equipment, and the telescopic platform comprises a supporting seat, a moving table, a driving motor, a gear and a rack; the mobile station is movably arranged on the supporting seat, is used for bearing a projection host of the projection equipment, and can drive the projection host to move between an extension position and a retraction position so as to adjust the distance between the projection host and the projection screen; the driving motor is arranged on the supporting seat; the gear is connected with an output shaft of the driving motor; the rack is arranged on the moving table, extends in the moving direction of the moving table and is meshed with the gear. According to the telescopic platform provided by the embodiment of the invention, the number of parts of the driving structure can be reduced, the assembling difficulty of assembling personnel is reduced, and the overall cost of equipment is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of laser televisions, and in particular to a telescopic platform and a projection device. Background Art

[0002] At present, ultra-short-throw projection equipment such as laser TV is used in many occasions. Laser TV includes a projection host and a projection screen. The laser is emitted from the projection host, projected onto the projection screen, and reflected by the projection screen into the human eye to form an image. The projection ratio of laser TV refers to the size of the largest and smallest images projected onto the projection screen at the same distance. Since the laser TV is reflected by the projection screen, the projection ratio of the projection host needs to match the screen. At the same time, during the use of laser TV, users will adjust the positional relationship between the projection host and the projection screen according to their preferences to meet the projection screens of different sizes.

[0003] Usually, the projection host needs to be placed on a TV cabinet, but the depth of the existing TV cabinet cannot meet the depth of the TV cabinet required by the laser TV projection ratio, so a telescopic platform is usually used to assist the projection host to reach the specified position. The existing telescopic platform includes a support seat and a moving platform for carrying the projection host. The moving platform can be retracted relative to the support seat under the drive of a driving mechanism. After the projection host is placed on the moving platform, the laser projection device can be moved to the specified position by adjusting the telescopic length of the moving platform.

[0004] However, the existing telescopic platform has a large number of driving mechanism parts, which makes assembly difficult and costly. Utility Model Content

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a telescopic platform applied to a projection device.

[0006] In the first aspect, the present application discloses a telescopic platform for a projection device, which may include a support base, a movable platform, a drive motor, a gear and a rack, a support base; the movable platform is movably arranged on the support base, used to carry a projection host of the projection device, and can drive the projection host to move between an extended position and a retracted position, so as to adjust the distance between the projection host and the projection screen; the drive motor is arranged on the support base; the gear is connected to the output shaft of the drive motor; the rack is arranged on the movable platform, the rack extends along the moving direction of the movable platform, and the rack is meshed with the gear.

[0007] In this way, by providing gears and racks to achieve the movement of the movable platform relative to the support base, the number of parts of the driving structure can be reduced, the assembly difficulty of the assemblers can be reduced, and the overall cost of the equipment can be reduced.

[0008] In some embodiments of the present application, the mobile station includes a platform, the platform is used to carry the projection device, and the rack is arranged on a side surface of the platform facing the support base.

[0009] In some embodiments of the present application, the rack is integrally formed with the moving platform.

[0010] In some embodiments of the present application, the rack includes a first limiting end, a second limiting end and a rack segment, one end of the rack segment is connected to the first limiting end, and the other end is connected to the second limiting end, and the rack segment is meshed with the gear.

[0011] In some embodiments of the present application, the telescopic platform also includes: an auxiliary guide structure, the auxiliary guide structure includes a guide column and a guide slider, one of the guide column and the guide slider is arranged on the support seat, and the other is arranged on the movable platform; the guide slider is provided with a guide through hole, the guide column is passed through the guide through hole, and the guide slider can slide relative to the extension direction of the guide column.

[0012] In some embodiments of the present application, there are multiple guide sliders, and the multiple guide sliders are arranged at intervals in the extension direction of the guide column.

[0013] In some embodiments of the present application, there are multiple auxiliary guide structures, and the multiple auxiliary guide structures are arranged at intervals in a first direction; wherein the first direction is perpendicular to the extension direction of the guide column.

[0014] In some embodiments of the present application, the guide slider includes a first surface facing the drive motor, and the rack is arranged on the first surface.

[0015] In some embodiments of the present application, the telescopic platform further includes: an adjusting bolt, wherein the adjusting bolt is used to be connected to a fixing hole on the projection host, so as to drive the projection host to move along the axial direction of the adjusting bolt by rotating the adjusting bolt.

[0016] In the second aspect, the present application also provides a projection device, which includes a projection host, a projection screen and the telescopic platform described in any one of the above technical solutions, the projection host is carried on a movable platform of the telescopic platform, the projection port of the projection host faces the projection screen, and the movable platform drives the projection host to move toward or away from the projection screen.

[0017] Among them, the technical effects brought about by any design method in the second aspect can refer to the technical effects brought about by different design methods in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A schematic diagram of a telescopic platform provided for some embodiments of the present application;

[0021] Figure 2 for Figure 1 A schematic diagram of the accommodating cavity of the telescopic platform shown in ;

[0022] Figure 3 for Figure 1 A cross-sectional view of the telescopic platform shown in ;

[0023] Figure 4 for Figure 3 An enlarged view of A shown in FIG.

[0024] Figure 5 for Figure 3 A schematic diagram of the rack shown in ;

[0025] Figure 6 Schematic diagram of a telescopic platform provided for other embodiments of the present application;

[0026] Figure 7 Based Figure 6 A schematic diagram of the accommodating cavity of the telescopic platform shown;

[0027] Figure 8 for Figure 5 A schematic diagram of the auxiliary guide structure shown in ;

[0028] Fig. 9 for Figure 5 Schematic diagram of the gear and rack shown in ;

[0029] Fig.10 for Fig. 9 An enlarged view of point B is shown in FIG.

[0030] Reference numerals:

[0031] 100. Telescopic platform;

[0032] 110. Support seat; 111. Driving motor;

[0033] 120, mobile platform; 121, platform; 1211, first wall surface;

[0034] 130. Gear;

[0035] 140, rack; 141, first limiting end; 142, second limiting end; 143, rack segment;

[0036] 150, accommodating chamber;

[0037] 160, auxiliary guide structure; 161, guide column; 162, guide slider; 1621, guide through hole; 1622, first surface;

[0038] 170. Adjusting bolt. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0041] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0043] In the description of the embodiments of the present application, the term "and / or" refers to and covers any and all possible combinations of one or more of the associated listed items. The term "and / or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present application generally indicates that the associated objects before and after are in an "or" relationship.

[0044] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. In addition, the directional terms mentioned in the embodiments of the present application, such as "inside", "outside", etc., are only references to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0046] Currently, projection equipment, such as laser TV, is used in many places. Projection equipment can include a projection host, a projection screen and a telescopic platform. The laser is emitted from the projection host, projected onto the projection screen, and reflected by the projection screen into the human eye to form an image. Among them, projection screens can generally be divided into two types: reflective and transmissive. The reflective type is used for front projection, and the transmissive type is used for rear projection. The front projection screen is divided into flat screen and curved screen. The flat screen can be divided into glass bead screen, metal screen, embossed plastic screen, elastic screen, etc. (embossed plastic is divided into white plastic, gray plastic, silver plastic, etc.)

[0047] The transmittance of a projection device refers to the size of the largest and smallest images projected onto the projection screen at the same distance. Since the projection device reflects the image through the projection screen, the transmittance of the projection host needs to match the projection screen. At the same time, during the use of the projection device, the user will adjust the positional relationship between the projection host and the projection screen according to their own preferences to meet the projection screen of different sizes.

[0048] Usually, the projection host needs to be placed on a TV cabinet, but the depth of the existing TV cabinet cannot meet the TV cabinet depth required by the laser TV projection ratio. Figure 1 , a telescopic platform 100 is usually used to assist the projection host to reach a specified position. The telescopic platform 100 in the related art may include a support base 110 and a moving platform 120 for carrying the projection host, and the moving platform 120 can drive the projection host to move between an extended position and a retracted position to adjust the distance between the projection host and the projection screen.

[0049] In some embodiments of the present application, a driving motor 111 and a transmission member may be provided on the support base 110, and the transmission member may include a screw and a nut in threaded cooperation, the extension direction of the screw is parallel to the extension direction of the guide groove, one end of the screw is connected to the output shaft of the driving motor 111, and the nut is connected to the moving platform 120. In this way, the output shaft of the driving motor 111 drives the screw to rotate, and the thread cooperation between the nut and the screw converts the rotation of the screw into the translation of the nut in the axial direction of the screw, thereby driving the translation of the moving platform 120 relative to the support base 110.

[0050] Among them, in order to ensure the stability of the connection between the screw rod and the output shaft of the driving motor 111, the screw rod and the output shaft are connected by a coupling. In order to ensure that the movable platform 120 has a certain stroke, the screw rod needs to have a sufficient length. In order to ensure that the screw rod can remain stable during operation, it is necessary to set a support seat 110, flange bearings, elastic parts and other transmission structures in the extension direction of the screw rod. There are a large number of parts and components, the assembly process is complicated, and the precision requirements of the parts and components are high, resulting in high production costs and assembly costs of the products.

[0051] In order to solve the above technical problems, the present application also provides a telescopic platform 100, see Figure 1 and Figure 2 The telescopic platform 100 realizes the movement of the mobile platform 120 relative to the support base 110 through the gear 130 and the rack 140 that cooperate with each other, wherein the gear 130 is connected to the output shaft of the driving motor 111; the rack 140 is arranged on the mobile platform 120, and the rack 140 extends along the extension direction of the mobile platform 120, and the rack 140 is meshed with the gear 130.

[0052] Thus, on one hand, by providing the gear 130 and the rack 140 to realize the movement of the movable platform 120 relative to the support base 110, the number of components of the driving structure can be reduced, the assembly difficulty of the assemblers can be reduced, and the overall cost of the equipment can be reduced.

[0053] In some embodiments of this application, please refer to Figures 1 to 3 The movable platform 120 may include a platform 121, the platform 121 is used to carry the projection device, the platform 121 includes a first wall 1211 facing the support seat 110, and the rack 140 is arranged on the first wall 1211. It should be noted that the movable platform 120 and the support seat 110 jointly define a receiving cavity 150, the driving motor 111 is located in the receiving cavity 150, and is fixed on the support seat 110, wherein the first wall 1211 is the upper wall of the receiving cavity 150, and the extension direction of the rack 140 (for example Figure 3 The front-to-back direction shown in FIG. 1 ) is consistent with the moving direction of the moving stage 120, and the axial direction of the output shaft of the driving motor 111 (eg Figure 2 The left and right directions shown in the figure are perpendicular to the extension direction of the rack 140. Through the cooperation between the gear 130 and the rack 140, the rotation of the output shaft of the driving motor 111 is converted into the movement of the rack 140, and then converted into the movement of the moving platform 120.

[0054] The rack 140 can be bonded to the first wall 1211; the rack 140 can also be clamped to the first wall 1211, and the rack 140 can also be fixed to the moving platform 120 by screws. In order to ensure the stability of the rack 140 fixed to the first wall 1211, a support structure for supporting the rack 140 can also be provided on the support seat 110.

[0055] Specifically, the gear 130 may be a spur gear, and the rack 140 may be a straight rack matched with the gear 130 .

[0056] In some embodiments of this application, please continue to refer to Figure 3 The movable platform 120 and the rack 140 are integrally formed, which can reduce the assembly steps of fixing the rack 140 to the movable platform 120, further simplify the assembly steps of the assemblers, reduce the workload of the assemblers, and reduce the overall cost of the telescopic platform 100.

[0057] In some embodiments of this application, please refer to Figure 4 and Figure 5 The rack 140 may include a first limiting end 141, a second limiting end 142 and a rack 140 segment, one end of the rack 140 segment (eg Figure 5 The rear end of the rack 140 shown in FIG. 1 is connected to the first limit end 141, and the other end (for example Figure 5The front end of the rack 140 shown in the figure is connected to the second limit end 142, and the rack 140 segment is meshed with the gear 130. It should be noted that the rack 140 segment has teeth, and the first limit end and the second limit end 142 have no teeth. Therefore, the gear 130 can only cooperate with the rack 140 segment. When the gear 130 moves relative to the rack 140 to the first limit end 141 or the second limit end 142, the gear 130 and the rack 140 cannot be meshed, and the gear 130 and the rack 140 bracket cannot move relative to each other.

[0058] It can be understood that the telescopic movement of the movable platform 120 relative to the support base 110 has a fixed maximum stroke. By setting the first limit end 141 and the second limit end 142, the translation stroke of the rack 140 can be prevented from exceeding the preset stroke, thereby preventing the components between the movable platform 120 and the support base 110 from being damaged due to squeezing or pulling.

[0059] In some embodiments of the present application, the telescopic platform 100 may further include a controller, which is electrically connected to the drive motor 111. The controller can control the rotation direction of the output shaft of the drive motor 111, and then control the reciprocating movement of the mobile platform 120 relative to the support base 110 through the controller. The controller can also control the start and stop of the drive motor 111, and then control the mobile platform 120 to stop at the target position.

[0060] In some other embodiments, the support base 110 may be provided with a first sensor and a second sensor, wherein the first sensor is used to detect whether the mobile platform 120 has returned to the retracted position. When the first sensor detects that the mobile platform 120 has returned to the retracted position, the first sensor transmits a command to the controller to stop driving the motor 111. The second sensor is used to detect whether the mobile platform 120 has reached the maximum extended position. When the second sensor detects that the mobile platform 120 has reached the maximum extended position, the second sensor transmits a command to the controller to stop driving the motor 111. In this way, the translation stroke of the rack 140 can be prevented from exceeding the preset stroke, and the components between the mobile platform 120 and the support base 110 can be prevented from being damaged due to squeezing or pulling.

[0061] In some embodiments of this application, please refer to Figure 6 and Figure 7The telescopic platform 100 may further include an auxiliary guide structure 160, which may include a guide column 161 and a guide slider 162, one of which is disposed on the support base 110, and the other is disposed on the moving platform 120. The guide slider 162 is provided with a guide through hole 1621, the guide column 161 is passed through the guide through hole 1621, and the guide slider 162 can slide relative to the extension direction of the guide column 161. Thus, by providing the auxiliary guide structure 160, the stability of the moving platform 120 relative to the support base 110 can be further ensured.

[0062] In a specific embodiment, the guide column 161 can be arranged on the support base 110 and the guide slider 162 can be arranged on the moving platform 120 , or the guide column 161 can be arranged on the moving platform 120 and the guide column 161 can be arranged on the support base 110 .

[0063] It should be noted that the guide slider 162 slides relative to the extension direction of the guide column 161. Therefore, the movable platform 120 moves relative to the support base 110 in the extension direction of the guide column 161, thereby preventing the movable platform 120 from moving in the width direction of the support base 110 (for example, Figure 7 ) in the left and right directions shown in the figure.

[0064] The number of guide sliders 162 is multiple, please continue to refer to Figure 7 and Figure 8 A plurality of guide sliders 162 are spaced apart in the extension direction of the guide column 161 , so that the stability of the guide slider 162 sliding relative to the guide column 161 can be further ensured, thereby ensuring the stability of the telescopic movement of the movable platform 120 relative to the support seat 110 .

[0065] In some embodiments of the present application, the number of auxiliary guide structures 160 can be multiple, and the multiple auxiliary guide structures 160 are arranged at intervals in the first direction. The first direction is perpendicular to the extension direction of the guide column 161. It can be understood that by providing multiple auxiliary guide structures 160, the stability of the movement of the guide slider 162 relative to the guide column 161 can be further guaranteed, thereby ensuring the stability of the telescopic movement of the mobile platform 120 relative to the support seat 110.

[0066] In a specific implementation process, the number of the auxiliary guide structures 160 can be two, and the two auxiliary guide structures 160 are arranged at intervals in the width direction of the telescopic platform 100, and the drive motor 111 is located between the two auxiliary guide structures 160. The width direction of the telescopic platform 100 is perpendicular to the extension direction of the guide column 161.

[0067] In some embodiments of this application, please refer to Figures 7 to 10, the guide slider 162 includes a first surface 1622 facing the drive motor 111, and the rack 140 is arranged on the first surface 1622. It should be noted that, at this time, the guide slider 162 is arranged on the moving platform 120, the rack 140 and the guide slider 162 move synchronously with the moving platform 120, and the output shaft of the drive motor 111 is arranged toward the guide slider 162, so that, while ensuring that the gear 130 and the rack 140 are meshed, the moving platform 120 can move relative to the support base 110, and at the same time, it can be avoided that the rack 140 occupies the space of the telescopic platform 100 in its height direction.

[0068] Specifically, the gear 130 may be a bevel gear, and the rack 140 may be a helical rack matched with the gear 130 .

[0069] In some embodiments of this application, please refer to Figure 1 The telescopic platform 100 may further include: an adjusting bolt 170 . The projection host is provided with a fixing hole for wall mounting. The adjusting bolt 170 is used to connect with the fixing hole on the projection host so as to drive the projection host to move along the axial direction of the adjusting bolt 170 by rotating the adjusting bolt 170 .

[0070] Specifically, an adjustment hole may be provided on the movable platform 120 , and the adjustment bolt 170 is disposed on the movable platform 120 . One end of the adjustment bolt 170 is used for threaded connection with the fixing hole of the projection host, and the other end is inserted into the adjustment hole.

[0071] Among them, the adjustment hole can be selected as a through hole on the movable platform 120, the adjustment hole can be selected as an oblong hole extending in a direction parallel to the movable platform 120, or the adjustment hole can be selected as a rectangular through hole. The adjusting bolt 170 can move in the adjusting hole, so that the adjusting bolt 170 can be positioned on the movable platform 120, so that the adjusting bolt 170 can adapt to projection hosts of different sizes.

[0072] The number of the above-mentioned adjusting bolts 170 and adjusting holes can be selected to be multiple, and the multiple adjusting holes can be selected to be arranged at intervals on the movable platform 120. The number of adjusting bolts 170 can be selected to be equal to the number of adjusting holes, so that each adjusting hole is provided with an adjusting bolt 170. Of course, the number of adjusting bolts 170 can also be selected to be less than the adjusting holes. For example, the number of adjusting holes is selected to be ten, and the number of adjusting bolts 170 is selected to be two, and the two adjusting bolts 170 can be respectively connected to two of the ten adjusting holes.

[0073] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic platform for projection equipment, characterized in that: include: Support seat; A moving platform, the moving platform is movably arranged on the supporting base, used for carrying a projection host of the projection device, and can drive the projection host to move between an extended position and a retracted position to adjust the distance between the projection host and the projection screen; A driving motor, wherein the driving motor is arranged on the supporting seat; A gear connected to an output shaft of the driving motor; A rack is arranged on the moving platform, the rack extends along the moving direction of the moving platform, and the rack is meshed with the gear.

2. The telescopic platform for projection equipment according to claim 1, characterized in that: The mobile platform comprises a platform, and the platform is used to carry the projection device. The rack is arranged on a side surface of the platform facing the support seat.

3. The telescopic platform for projection equipment according to claim 1, characterized in that: The rack is integrally formed with the moving platform.

4. The telescopic platform for projection equipment according to claim 1, characterized in that: The rack includes a first limiting end, a second limiting end and a rack segment, one end of the rack segment is connected to the first limiting end, and the other end is connected to the second limiting end, and the rack segment is meshed with the gear.

5. The telescopic platform for projection equipment according to claim 1, characterized in that: Also includes: An auxiliary guide structure, the auxiliary guide structure comprising a guide column and a guide slider, one of the guide column and the guide slider is arranged on the support seat, and the other is arranged on the moving platform; The guide slider is provided with a guide through hole, the guide post is passed through the guide through hole, and the guide slider can slide relative to the extension direction of the guide post.

6. The telescopic platform for projection equipment according to claim 5, characterized in that: The number of the guide sliding blocks is multiple, and the multiple guide sliding blocks are arranged at intervals in the extension direction of the guide column.

7. The telescopic platform for projection equipment according to claim 5, characterized in that: The number of the auxiliary guide structures is multiple, and the multiple auxiliary guide structures are arranged at intervals in the first direction; Wherein, the first direction is perpendicular to the extending direction of the guide column.

8. The telescopic platform for projection equipment according to claim 5, characterized in that: The guide slider includes a first surface facing the driving motor, and the rack is arranged on the first surface.

9. The telescopic platform according to claim 1, characterized in that: Also includes: An adjusting bolt is used to be connected to a fixing hole on the projection host, so that the projection host can be driven to move along the axial direction of the adjusting bolt by rotating the adjusting bolt.

10. A projection device, characterized in that: include: A projection host, a projection screen and a telescopic platform as described in any one of claims 1 to 9, wherein the projection host is carried on a moving platform of the telescopic platform, the projection port of the projection host faces the projection screen, and the moving platform drives the projection host to move toward or away from the projection screen.

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