Holder and projection device

Abstract

The utility model provides a holder and a projection device, and the holder comprises a housing which is provided with a bearing part, and a projection host is disposed on the bearing part; the driving unit comprises a driving part and a belt transmission part, and the driving end of the driving part is in transmission connection with the belt transmission part so as to drive the belt transmission part to rotate; the moving unit comprises a moving part, the first end of the moving part is movably connected with the transmission end of the belt transmission part, the second end of the moving part is connected with the bearing part, and the moving part is configured to be driven by the driving part to drive the bearing part to move in the first direction; the moving part and the driving part are arranged in a spaced mode in the second direction, the first direction is the width direction of the shell, and the second direction is the length direction of the shell. The transmission precision and the operation stability of the equipment are improved, the service life of the equipment is prolonged, and remarkable technical effects and application values are achieved.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a pan / tilt head and a projection device. Background Art

[0002] With the continuous development of society, people's pursuits are also constantly changing, and laser TVs are becoming more and more popular among the public. Laser TVs consist of a laser projection host and a projection screen. The laser is emitted from the laser projection host, projected onto the projection screen, and then reflected by the projection screen into the human eye to form an image. The projection ratio of a laser TV refers to the size of the largest and smallest images projected onto the projection screen at the same distance. Since laser TVs are reflected by the projection screen, the projection ratio of the laser projection device needs to match the screen.

[0003] At present, in order to meet the projection ratio of laser TV, a telescopic pan-tilt has been proposed. The pan-tilt provides torque to the screw assembly through the driving member, and the slider moves when the screw in the screw assembly rotates, thereby driving the pan-tilt to extend and retract. Among them, the driving member and the screw assembly are connected by a cross coupling. The cross coupling is divided into multiple parts, which are movably connected and can move with each other. During assembly, after the two ends are fixed by screws and connected shafts, if there is an axial gap between the parts, this gap is unstable. Therefore, when the user uses it, there will be movement along the telescopic direction, resulting in inaccurate telescopic accuracy and screen offset problems; if the eccentricity angle between the motor output shaft and the screw shaft is large, there will be axial inward and outward friction between the coupling components during rotation, and noise problems will also occur.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] The main purpose of this application is to provide a pan / tilt head and projection device, which not only improves the transmission accuracy and running stability of the equipment, but also extends the service life of the equipment, and has significant technical effects and application value.

[0006] To achieve the above objectives, in a first aspect, the present application provides a pan-tilt platform to carry a projection host, the pan-tilt platform comprising:

[0007] The housing has a bearing portion, and the projection host is arranged on the bearing portion;

[0008] A driving unit, the driving unit comprises a driving member and a belt transmission member, a driving end of the driving member is drivingly connected to the belt transmission member to drive the belt transmission member to rotate;

[0009] A moving unit, the moving unit comprising a moving member, a first end of the moving member being movably connected to a driving end of the belt driving member, a second end of the moving member being connected to a bearing portion, and the moving member being configured to drive the bearing portion to move along a first direction under the drive of the driving member;

[0010] The moving member is spaced apart from the driving member along a second direction, wherein the first direction is a width direction of the shell, and the second direction is a length direction of the shell.

[0011] The beneficial effects of the present application are as follows: by making the shell into a special-shaped design, the special-shaped shell can reduce the thickness of the projection host part without affecting the structural strength and function, so that the intermediate load projection host part can be made thinner. Since the thickness of the intermediate load projection host part is reduced, the overall thickness of the device after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-shaped coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem caused by the friction between the coupling components due to the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience.

[0012] Based on the above technical solution, the present application can also be improved as follows.

[0013] In some optional embodiments, the belt transmission member has a first transmission end and a second transmission end, and the first transmission end and the second transmission end are extended along the second direction;

[0014] The first transmission end is transmission-connected to the driving end of the driving member, and the second transmission end is transmission-connected to the end of the moving member.

[0015] It should be noted that the transmission method using a belt drive can reduce the dimensions in the front and rear directions and reduce the volume of the gimbal to a certain extent. The belt drive is designed on the back side of the gimbal, and the back side is partially raised to make the front half of the gimbal ultra-thin and improve the aesthetics.

[0016] In some optional embodiments, the belt transmission member includes a driving wheel, a driven wheel and a transmission belt, the transmission belt is connected between the driving wheel and the driven wheel, the driving wheel is connected to the output shaft of the driving member, and the driven wheel is rotationally connected to the moving member.

[0017] It should be noted that the belt drive method is relatively simple in the assembly process, reduces the strict requirements for axial alignment, improves assembly efficiency, can provide a more stable transmission effect, reduce or eliminate axial movement clearance, thereby avoiding screen offset problems and improving the accuracy and stability of the equipment.

[0018] In some optional embodiments, the moving unit further includes a first sliding member and a first guide rail, wherein a first end of the first sliding member is slidably connected to the moving member, and a second end of the first sliding member is fixedly connected to the bearing portion;

[0019] The first guide rail is arranged on the housing, and the first sliding member is sleeved on the first guide rail.

[0020] It should be noted that the first sliding member is sleeved on the first guide rail, and the first guide rail is arranged on the shell along the first direction to provide guidance for the movement of the first sliding member. The moving member provides torque therefor, so that the first sliding member moves along the first direction, thereby driving the bearing part to move along the first direction.

[0021] In some optional embodiments, the moving unit further includes a second sliding member and a second guide rail, and the first sliding member and the second sliding member are respectively located on opposite sides of the housing along the second direction;

[0022] The second guide rail is arranged on the housing, and the second sliding piece is sleeved on the second guide rail.

[0023] It should be noted that the second sliding member is arranged to improve the stability of the mobile unit during movement. The first sliding member and the second sliding member are arranged at intervals on opposite sides of the shell. Since the first sliding member and the second sliding member are both connected to the shell, when the first sliding member slides on the second guide rail, the second sliding member moves synchronously on the second guide rail to improve the stability of the movement of the entire bearing part, and the sense of safety is higher.

[0024] In some optional embodiments, the housing includes an upper shell and a lower shell, the upper shell is movably arranged relative to the lower shell, and the bearing portion is located on the upper shell;

[0025] The first sliding member and the second sliding member are both arranged on the upper shell, and the first guide rail and the second guide rail are both arranged on the lower shell.

[0026] It should be noted that the projection host is arranged on the outer wall of the upper shell, and the first sliding member and the second sliding member are both arranged on the inner wall of the upper shell. Due to the arrangement of the first sliding member, the first guide rail, the second sliding member and the second guide rail, the upper shell moves relative to the lower shell along the first direction.

[0027] In some optional embodiments, a connecting unit is further included, the connecting unit includes a first connecting member and a second first connecting member, the end of the first guide rail has a first positioning portion, the first positioning portion is provided with a first connecting hole, the side wall of the lower shell has a second positioning portion, the second positioning portion is provided with a second connecting hole, the first connecting hole and the second connecting hole are arranged at intervals along the third direction, the structures of the first positioning portion and the second positioning portion match each other, and the first connecting member passes through the first connecting hole and the second connecting hole in sequence to connect the first guide rail and the lower shell;

[0028] The end of the second guide rail has a third positioning portion, the third positioning portion is provided with a third connecting hole, the side wall of the lower shell has a fourth positioning portion, the fourth positioning portion is provided with a fourth connecting hole, the third connecting hole and the fourth connecting hole are arranged at intervals along the third direction, the structures of the third positioning portion and the fourth positioning portion match each other, and the second first connecting member passes through the third connecting hole and the fourth connecting hole in sequence, so that the second guide rail is connected to the lower shell;

[0029] The third direction is the thickness direction of the shell.

[0030] It should be noted that such a setting allows the first connecting member to avoid the problem of work tolerance caused by the production of the structural member during installation. In addition, the first connecting hole and the second connecting hole need to be highly aligned during installation, which makes the installation process more complicated. The present application makes the entire installation process simpler by setting the first positioning part and the second positioning part. It only needs to align the first positioning part and the second positioning part. In addition, it is installed from the thickness direction of the shell, which makes the installation easier.

[0031] In some optional embodiments, the driving member is a driving motor, and the moving member is a lead screw;

[0032] The first sliding member is provided with a threaded hole matching the lead screw. When the lead screw rotates around its own axis, the first sliding member is driven to move along the axial direction of the lead screw.

[0033] It should be noted that the thread on the lead screw matches the threaded hole in the first sliding member. When the lead screw rotates, it drives the first sliding member to move forward and backward along the length direction of the lead screw, that is, to extend out of the bottom shell, or to retract into the bottom shell.

[0034] In a second aspect, the present application further provides a pan-tilt platform for carrying a projection host, the pan-tilt platform comprising:

[0035] A housing, wherein the projection host is arranged on the housing;

[0036] A driving unit, the driving unit comprises a driving member and a belt transmission member, a driving end of the driving member is drivingly connected to the belt transmission member to drive the belt transmission member to rotate;

[0037] A moving member, the moving member is arranged between the belt transmission member and the housing, and the moving member is configured to drive the housing to move along a first direction under the driving of the driving member;

[0038] The moving member is spaced apart from the driving member along the second direction, and an angle is formed between the first direction and the second direction.

[0039] In a third aspect, the present application also provides a projection device, including a projection host and the above-mentioned pan-tilt head, the projection host is installed on the pan-tilt head, and the pan-tilt head is configured to drive the projection host to move.

[0040] The present application provides a pan-tilt head and a projection device, wherein the projection device includes a projection host and the above-mentioned pan-tilt head, wherein the projection host is mounted on the pan-tilt head, and the pan-tilt head is configured to drive the projection host to move; wherein the pan-tilt head includes: a shell, wherein the shell has a bearing portion, and the projection host is arranged on the bearing portion; a driving unit, wherein the driving unit includes a driving member and a belt transmission member, wherein the driving end of the driving member is drivingly connected to the belt transmission member to drive the belt transmission member to rotate; a moving unit, wherein the moving unit includes a moving member, wherein a first end of the moving member is movably connected to a driving end of the belt transmission member, and a second end of the moving member is connected to the bearing portion, and the moving member is configured to drive the bearing portion to move along a first direction under the drive of the driving member; and the moving member is spaced apart from the driving member along a second direction, wherein the first direction is a width direction of the shell, and the second direction is a length direction of the shell.

[0041] By making the shell into a special-shaped design, the special-shaped shell can reduce the thickness of the projection host part without affecting the structural strength and function, so that the intermediate load projection host part can be made thinner. Since the thickness of the intermediate load projection host part is reduced, the overall thickness of the equipment after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-shaped coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem of the friction between the coupling components caused by the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0043] Figure 1 A schematic diagram of the structure of the pan / tilt provided by the prior art;

[0044] Figure 2 A schematic diagram of the structure of a projection device provided by the prior art;

[0045] Figure 3 A schematic diagram of the structure of a projection device provided in an embodiment of the present application at a first viewing angle in a first state;

[0046] Figure 4 A schematic diagram of the structure of a projection device provided in an embodiment of the present application at a second viewing angle in a first state;

[0047] Figure 5 A schematic diagram of the structure of the projection device provided by an embodiment of the present application in a third viewing angle in a first state;

[0048] Figure 6 A schematic diagram of the structure of the projection device provided in an embodiment of the present application in the second state;

[0049] Figure 7 A schematic diagram of the structure of a first-angle view of the gimbal provided in an embodiment of the present application;

[0050] Figure 8 A schematic diagram of the structure of a second viewing angle of the gimbal provided in an embodiment of the present application;

[0051] Fig. 9 for Figure 8 A partial enlarged view of point I in the middle;

[0052] Fig.10 An exploded view of a projection device provided in an embodiment of the present application;

[0053] Fig.11 for Fig.10 A partial enlarged view of point II in the middle.

[0054] Description of reference numerals:

[0055] 100-pan head; 131a-slider; 135a-screw assembly; 150-coupling;

[0056] 110-housing; 111-upper housing; 112-lower housing; 113-cover plate;

[0057] 120-driving unit; 121-driving member; 122-belt transmission member; 1221-driving wheel; 1222-driven wheel; 1223-transmission belt;

[0058] 130-moving unit; 131-first sliding member; 1311-first sliding part; 1312-first moving part; 1313-linear bearing; 132-first guide rail; 1321-first connecting hole; 133-second sliding member; 134-second guide rail; 1341-third connecting hole; 135-moving member; 136-screw bracket;

[0059] 140-connection unit; 141-first connection member; 142-second connection member;

[0060] 200-projection device; 210-projection host. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. All other embodiments obtained are within the scope of protection of the present application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Figure 1 A schematic diagram of the structure of the pan / tilt provided by the prior art, Figure 2 A schematic diagram of the structure of a projection device provided by the prior art, such as Figure 1 and Figure 2 As shown, at present, in order to meet the projection ratio of laser TV, a telescopic pan-tilt is proposed, which provides torque to the screw assembly 135a through the driving member 121, and the slider 131a telescopically moves when the screw in the screw assembly 135a rotates, wherein the driving member 121 and the screw assembly 135a are connected by a cross coupling 150, and the cross coupling 150 is divided into multiple parts, which are movably connected and can move with each other. When assembling, after the two ends are fixed by screws and the connected shaft, if there is a gap between the parts in the axial direction, this gap is unstable. Therefore, when the user uses it, there will be movement along the telescopic direction, resulting in inaccurate telescopic accuracy and screen offset problems; if the eccentric deflection angle of the motor output shaft and the screw shaft is large, when rotating, there will be mutual axial inward and outward friction between the components of the coupling 150, and noise problems will also occur. In addition, the driving member 121 and the screw assembly 135a are in the same horizontal plane in the front and rear directions, resulting in a large thickness of the entire pan-tilt.

[0066] In order to overcome the defects in the prior art, the pan / tilt head and projection device provided by the present application, by making the shell into a special-shaped design, the special-shaped shell can reduce the thickness of the projection host 210 part without affecting the structural strength and function, so that the intermediate load projection host 210 part can be made thinner. Since the thickness of the intermediate load projection host 210 part is reduced, the overall thickness of the equipment after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-flower coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem of the friction between the coupling components caused by the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience.

[0067] The contents of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application more clearly and in detail.

[0068] Figure 3 This is a schematic diagram of the structure of the projection device provided in an embodiment of the present application at a first viewing angle in a first state. Figure 4 This is a schematic diagram of the structure of the projection device provided in an embodiment of the present application at a second viewing angle in a first state. Figure 5 A schematic diagram of the structure of the projection device provided in an embodiment of the present application in a third viewing angle in a first state, Figure 6 This is a schematic diagram of the structure of the projection device provided in an embodiment of the present application in a second state. Figure 7A schematic structural diagram of the first viewing angle of the gimbal provided in an embodiment of the present application.

[0069] like Figures 3 to 7 As shown, the embodiment of the present application provides a pan-tilt platform 100 to carry a projection host 210, and the pan-tilt platform 100 includes:

[0070] The housing 110 has a carrying portion, and the projection host 210 is disposed on the carrying portion;

[0071] It should be noted that the carrying portion can move relative to the housing 110 , thereby driving the projection host 210 to extend and retract.

[0072] The driving unit 120 includes a driving member 121 and a belt transmission member 122. The driving end of the driving member 121 is in driving connection with the belt transmission member 122 to drive the belt transmission member 122 to rotate.

[0073] The moving unit 130 includes a moving member 135, a first end of the moving member 135 is movably connected to the driving end of the belt driving member 122, a second end of the moving member 135 is connected to the bearing portion, and the moving member 135 is configured to drive the bearing portion to move along the first direction under the drive of the driving member 121;

[0074] The moving member 135 is spaced apart from the driving member 121 along the second direction, wherein the first direction is the width direction of the housing 110 , and the second direction is the length direction of the housing 110 .

[0075] Through the above-mentioned arrangement, that is, by making the shell 110 into a special-shaped design, the special-shaped shell 110 can reduce the thickness of the projection host 210 part without affecting the structural strength and function, so that the intermediate load projection host 210 part can be made thinner. Since the thickness of the intermediate load projection host 210 part is reduced, the overall thickness of the device after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-shaped coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem of the friction between the coupling components caused by the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience.

[0076] It should be noted that each structure is described in detail below.

[0077] It should be noted that when the driving member 121 is working, the torque is transmitted to the belt transmission member 122 through the driving end. Since the belt transmission member 122 is located between the moving member 135 and the driving end, the driving force of the driving member 121 can be transmitted to the moving member 135, and then the bearing part is driven to move through the moving member 135. Since the projection host 210 is set on the bearing part, the projection host 210 is driven to move along the first direction.

[0078] At this time, the first direction is the width direction of the housing 110 , which is also the moving direction of the projection host 210 .

[0079] It should be noted that, along the second direction, the moving member 135 and the driving member 121 are spaced apart, which means that the moving member 135 and the driving member 121 are not on the same line. This staggered arrangement allows the thicker moving member 135 to be arranged on the rear side of the shell 110, and the rear side is partially convex, so that the front half of the pan-tilt head 100 is ultra-thin and the rear side is convex. After the projection host 210 is installed, the convex part is blocked by the projection host 210, and the ultra-thin part of the front side is presented to the user, which reduces the sense of hierarchy and improves the aesthetics.

[0080] It should be noted that if Figure 2 As shown, the thickness of the pan / tilt head in the prior art is h1, the thickness of the projection host 210 is H, and the thickness of the projection device is H1, wherein H1=h1+H.

[0081] like Figure 4 As shown, the thickness of the gimbal 100 provided in the embodiment of the present application is h2, the thickness of the projection host 210 is H, and the thickness of the projection device 200 is H2, wherein H2=h2+H. Since the thickness of the projection host 210 remains consistent, when the thickness of the gimbal is reduced, the thickness of the projection device 200 is also reduced. It is obvious that the thickness of the gimbal of the present application is less than that of the gimbal in the prior art.

[0082] In some optional embodiments, the belt transmission member 122 has a first transmission end and a second transmission end, and the first transmission end and the second transmission end are extended along the second direction;

[0083] The first transmission end is transmission-connected to the driving end of the driving member 121 , and the second transmission end is transmission-connected to the end of the moving member 135 .

[0084] It should be noted that the transmission method using the belt transmission part 122 can reduce the dimensions in the front and rear directions and reduce the volume of the gimbal 100 to a certain extent. The belt transmission part 122 is designed on the rear side of the gimbal 100, and the rear side is partially raised to achieve an ultra-thin front half of the gimbal 100 and improve the aesthetics.

[0085] Specifically, since the first transmission end is used for transmission connection with the driving end of the driving member 121, and the second transmission end is used for transmission connection with the end of the moving member 135, the second transmission end is located at the rear side of the gimbal 100 relative to the first transmission end to match the moving member 135 located at the rear side of the gimbal 100.

[0086] Figure 8 A schematic diagram of the structure of the second viewing angle of the pan / tilt provided in an embodiment of the present application, Fig. 9 for Figure 8 The local enlarged view of point I in the middle, Fig.10 An exploded view of a projection device provided in an embodiment of the present application, Fig.11 for Fig.10 A partial enlarged view of point II in the middle.

[0087] like Figures 3 to 11 As shown, in some optional embodiments, the belt transmission member 122 includes a driving wheel 1221, a driven wheel 1222 and a transmission belt 1223, the transmission belt 1223 is connected between the driving wheel 1221 and the driven wheel 1222, the driving wheel 1221 is connected to the output shaft of the driving member 121, and the driven wheel 1222 is rotationally connected to the moving member 135.

[0088] It should be noted that the belt drive method is relatively simple in the assembly process, reduces the strict requirements for axial alignment, improves assembly efficiency, can provide a more stable transmission effect, reduce or eliminate axial movement clearance, thereby avoiding screen offset problems and improving the accuracy and stability of the equipment.

[0089] It can be understood that when the driving member 121 is running and the driving wheel 1221 is driven to rotate, the transmission belt 1223 will be driven by the driving wheel 1221, and accordingly, the transmission belt 1223 will drive the driven wheel 1222 to rotate. The output end of the driving member 121 can be connected to the driving wheel 1221, thereby improving the transmission efficiency of the driving member 121.

[0090] In a possible implementation, the driving wheel 1221 and the driven wheel 1222 can be respectively arranged along the second direction of the shell 110, so as to better match the shape of the shell 110 and reduce the thickness of the projection host 210 without affecting the structural strength and function.

[0091] In some embodiments, the tension of the transmission belt 1223 is ensured by the raised fixing columns on the shell 110 structure. The raised installation columns can always ensure that the transmission belt 1223 is in a tensioned state during installation, and the transmission belt 1223 will not become loose due to insufficient screw tightening force or fatigue displacement.

[0092] In some optional embodiments, the moving unit 130 further includes a first sliding member 131 and a first guide rail 132, wherein a first end of the first sliding member 131 is slidably connected to the moving member 135, and a second end of the first sliding member 131 is fixedly connected to the bearing portion;

[0093] The first guide rail 132 is disposed on the housing 110 , and the first sliding member 131 is sleeved on the first guide rail 132 .

[0094] It should be noted that the first sliding member 131 is sleeved on the first guide rail 132, and the first guide rail 132 is arranged on the shell 110 along the first direction to provide guidance for the movement of the first sliding member 131. The moving member 135 provides torque therefor, so that the first sliding member 131 moves along the first direction, thereby driving the bearing part to move along the first direction.

[0095] In some embodiments, the first sliding member 131 is a sliding block, and the first sliding member 131 has a first sliding portion 1311 and a first moving portion 1312 . The first sliding portion 1311 is sleeved on the first guide rail 132 , and the first moving portion 1312 is slidably connected to the moving member 135 .

[0096] Along the first direction, the extension dimension of the first sliding portion 1311 is greater than the extension dimension of the first moving portion 1312 to improve the sliding stability.

[0097] In other embodiments, the first sliding portion 1311 is a rectangular structure, in which a linear bearing 1313 is provided. The linear bearing 1313 is sleeved on the first guide rail 132. The linear bearing 1313 has the characteristics of low friction, reliable structure, strong load-bearing capacity, high long-distance running precision, and long service life. In addition, the number of screws to be installed can be reduced.

[0098] In some embodiments, the first sliding part 1311 and the first movable part 1312 are connected by an integral connection. In other embodiments, the first sliding part 1311 and the first movable part 1312 can also be connected by other connection methods. As long as the connection method can fix the first sliding part 1311 and the first movable part 1312, the purpose of this embodiment can be achieved. Here, there is no restriction on the connection method of the first sliding part 1311 and the first movable part 1312.

[0099] like Figures 3 to 11 As shown, in some optional embodiments, the moving unit 130 further includes a second sliding member 133 and a second guide rail 134, and the first sliding member 131 and the second sliding member 133 are respectively located on opposite sides of the housing 110 along the second direction;

[0100] The second guide rail 134 is disposed on the housing 110 , and the second sliding member 133 is sleeved on the second guide rail 134 .

[0101] It should be noted that the second sliding member 133 is provided to improve the stability of the mobile unit 130 during movement. The first sliding member 131 and the second sliding member 133 are spaced apart on opposite sides of the shell 110. Since the first sliding member 131 and the second sliding member 133 are both connected to the shell 110, when the first sliding member 131 slides on the second guide rail 134, the second sliding member 133 moves synchronously on the second guide rail 134 to improve the stability of the movement of the entire bearing portion, and the sense of safety is higher.

[0102] In some embodiments, the structure of the second sliding member 133 is the same as that of the first sliding member 131 to facilitate production.

[0103] Specifically, the second sliding member 133 is a sliding block, and the second sliding member 133 has a second sliding portion and a second moving portion. The second sliding portion is sleeved on the second guide rail 134 , and the second moving portion is disposed on the second sliding portion.

[0104] Along the first direction, an extension dimension of the second sliding portion is greater than an extension dimension of the second moving portion, so as to improve sliding stability.

[0105] In addition, the structure of the second sliding member 133 may refer to the structure of the first sliding member 131 , which will not be described in detail herein.

[0106] like Figures 3 to 11 As shown, in some optional embodiments, the housing 110 includes an upper shell 111 and a lower shell 112, the upper shell 111 is movably arranged relative to the lower shell 112, and the bearing portion is located on the upper shell 111;

[0107] The first sliding member 131 and the second sliding member 133 are both disposed on the upper shell 111 , and the first guide rail 132 and the second guide rail 134 are both disposed on the lower shell 112 .

[0108] It should be noted that the projection host 210 is arranged on the outer wall surface of the upper shell 111, and the first sliding member 131 and the second sliding member 133 are both arranged on the inner wall surface of the upper shell 111. Due to the arrangement of the first sliding member 131, the first guide rail 132, the second sliding member 133 and the second guide rail 134, the upper shell 111 moves relative to the lower shell 112 along the first direction.

[0109] In some embodiments, along the first direction, the thickness of the lower shell 112 near the driving member 121 is thicker than the thickness of the lower shell 112 far from the driving member 121, so that the driving member 121 can be hidden and the mobile unit 130 can be set in a thinner area, thereby reducing the thickness of the shell 110 and the overall thickness of the device after final installation will also be reduced accordingly.

[0110] In some embodiments, the housing 110 further includes a cover plate 113, which is arranged parallel to the upper housing 111, and the width of the cover plate 113 in the first direction is greater than the width of the driving member 121, so that the cover plate 113 can shield the driving unit 120. During the movement of the upper housing 111 of the platform, the position of the cover plate 113 remains unchanged.

[0111] like Figures 3 to 11 As shown, in some optional embodiments, a connecting unit 140 is further included, the connecting unit 140 includes a first connecting member 141 and a second first connecting member 141, the end of the first guide rail 132 has a first positioning portion, the first positioning portion is provided with a first connecting hole 1321, the side wall of the lower shell 112 has a second positioning portion, the second positioning portion is provided with a second connecting hole, the first connecting hole 1321 and the second connecting hole are arranged at intervals along the third direction, the structures of the first positioning portion and the second positioning portion match each other, the first connecting member 141 passes through the first connecting hole 1321 and the second connecting hole in sequence, so that the first guide rail 132 and the lower shell 112 are connected;

[0112] The end of the second guide rail 134 has a third positioning portion, and a third connecting hole 1341 is formed on the third positioning portion. The side wall of the lower shell 112 has a fourth positioning portion, and a fourth connecting hole is formed on the fourth positioning portion. The third connecting hole 1341 and the fourth connecting hole are arranged at intervals along the third direction. The structures of the third positioning portion and the fourth positioning portion match each other. The second first connecting member 141 passes through the third connecting hole 1341 and the fourth connecting hole in sequence, so that the second guide rail 134 is connected to the lower shell 112;

[0113] The third direction is the thickness direction of the housing 110 .

[0114] It should be noted that such a setting allows the first connecting member 141 to avoid the problem of work error caused by the production of the structural member during installation. In addition, the first connecting hole 1321 and the second connecting hole need to be highly aligned during installation, which makes the installation process more complicated. The present application makes the entire installation process simpler by setting the first positioning part and the second positioning part. It only needs to align the first positioning part and the second positioning part. In addition, it is installed from the thickness direction of the housing 110, which makes the installation easier.

[0115] In some embodiments, one of the first positioning portion and the second positioning portion may be a boss, and the other may be a recessed portion, and the boss portion may be embedded in the recessed portion to improve installation convenience and strength.

[0116] It should be noted that in the embodiment of the present application, considering the cost of the first connecting member 141, the first connecting member 141 can be a threaded fastener. Correspondingly, a first connecting hole 1321 is opened on the first guide rail 132, and the first connecting hole 1321 can be a threaded hole. The first connecting member 141 can pass through the first connecting hole 1321, and can be tightened or loosened to adjust the fixed and disassembled states.

[0117] In addition, correspondingly, a second connecting hole is opened on the lower shell 112, and the second connecting hole can also be a threaded hole. The first connecting member 141 can pass through the first connecting hole 1321, and the fixing and disassembly states can be adjusted by tightening or loosening.

[0118] Specifically, the first connecting member 141 passes through the first connecting hole 1321 and the second connecting hole in sequence and is tightened, thereby fixing the first guide rail 132 to the lower shell 112. Of course, when the first guide rail 132 needs to be removed, it is only necessary to loosen the first connecting member 141, and then take the first connecting member 141 out of the second connecting hole and the first connecting hole 1321 in sequence.

[0119] In addition, the second connecting member 142, the third connecting hole 1341, and the fourth connecting hole can be referred to above and will not be elaborated herein.

[0120] In some optional embodiments, the driving member 121 is a driving motor, and the moving member 135 is a lead screw;

[0121] The first sliding member 131 has a threaded hole matching the lead screw. When the lead screw rotates around its own axis, the first sliding member 131 is driven to move along the axial direction of the lead screw.

[0122] It should be noted that the thread on the lead screw matches the threaded hole in the first sliding member 131. When the lead screw rotates, it drives the first sliding member 131 to move forward and backward along the length direction of the lead screw, that is, to extend out of the bottom shell, or retract into the bottom shell.

[0123] In some embodiments, in order to improve the installation stability of the lead screw, a lead screw bracket 136 is installed on the bottom shell to fix the lead screw.

[0124] When the driving member 121 drives the driving wheel 1221 to rotate, the transmission belt 1223 is driven by the driving wheel 1221 to drive the driven wheel 1222 to rotate, and then drive the moving member 135 to rotate, and the first sliding member 131 threadedly matched with the moving member 135 moves forward and backward on the first guide rail 132, and then drives the second sliding member 133 to move forward and backward on the second guide rail 134, so that the first sliding member 131 drives the upper shell 111 to move forward and backward. That is, the driving member 121 drives the belt transmission member 122 to move, drives the moving member 135 to rotate, and then drives the first sliding member 131 and the upper shell 111 to move forward and backward, thereby completing the telescopic movement of the platform.

[0125] The pan / tilt head provided in the embodiment of the present application includes: a shell, the shell has a bearing part, and the projection host is arranged on the bearing part; a driving unit, the driving unit includes a driving member and a belt transmission member, and the driving end of the driving member is drivingly connected to the belt transmission member to drive the belt transmission member to rotate; a moving unit, the moving unit includes a moving member, a first end of the moving member is movably connected to the driving end of the belt transmission member, and a second end of the moving member is connected to the bearing part, and the moving member is configured to drive the bearing part to move along a first direction under the drive of the driving member; the moving member is spaced apart from the driving member along a second direction, wherein the first direction is the width direction of the shell, and the second direction is the length direction of the shell.

[0126] By making the shell into a special-shaped design, the special-shaped shell can reduce the thickness of the projection host 210 part without affecting the structural strength and function, so that the intermediate load projection host 210 part can be made thinner. Since the thickness of the intermediate load projection host 210 part is reduced, the overall thickness of the equipment after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-shaped coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem caused by the friction between the coupling components due to the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience.

[0127] In addition, if Figures 1 to 11 As shown, the embodiment of the present application further provides a pan / tilt platform 100 to carry a projection host 210, including:

[0128] The housing 110 , the projection host 210 is disposed in the housing 110 ;

[0129] The driving unit 120 includes a driving member 121 and a belt transmission member 122. The driving end of the driving member 121 is in driving connection with the belt transmission member 122 to drive the belt transmission member 122 to rotate.

[0130] A moving member 135, the moving member 135 is disposed between the belt transmission member 122 and the housing 110, and the moving member 135 is configured to drive the housing 110 to move along a first direction under the drive of the driving member 121;

[0131] The moving member 135 is spaced apart from the driving member 121 along the second direction, and an angle is formed between the first direction and the second direction.

[0132] The pan / tilt head provided in the embodiment of the present application has a shell with a special-shaped design. The shell with the special-shaped design can reduce the thickness of the projection host 210 part without affecting the structural strength and function, so that the intermediate load projection host 210 part can be thinner. Since the thickness of the intermediate load projection host 210 part is reduced, the overall thickness of the device after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-shaped coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem of the friction between the coupling components caused by the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience.

[0133] In addition, the embodiment of the present application further provides a projection device 200, including a projection host 210 and the above-mentioned pan-tilt head 100, the projection host 210 is installed on the pan-tilt head 100, and the pan-tilt head 100 is configured to drive the projection host 210 to move.

[0134] It should be noted that the projection device 200 provided in this embodiment specifically includes a projection host 210, a projection screen and the pan / tilt head 100 in the aforementioned embodiment, and the projection host 210 is used to project a projection image onto the display film of the projection screen.

[0135] The specific structure, working principle and function of the projection host 210 have been described in detail in the aforementioned embodiment 1, and will not be repeated here.

[0136] Specifically, in the projection device 200 of this embodiment, the projection host 210 can be any existing projector, such as a laser projector, etc. The projection host 210 can project a projection image onto the display film of the projection screen, so that the display film can display the projection image for people to watch.

[0137] The projection screen includes a display film, which may be an optical screen, and the display film may be an optical film mainly composed of a Fresnel lens layer. For example, the display film may include a diffusion layer, a substrate layer, and a Fresnel lens layer stacked in sequence in a direction away from the projection host 210 (or, it may also include a substrate layer, a diffusion layer, and a Fresnel lens layer stacked in sequence); wherein the substrate layer is a transparent film layer, and when displaying an image, a light beam is emitted from the projection host 210, and when passing through the diffusion layer, the light is dispersed by the diffusion layer, and then reflected on the surface of the Fresnel lens layer, so that the user can view the image.

[0138] The specific structure, working principle and function of the gimbal 100 have been described in detail in the aforementioned embodiment 1, and will not be repeated here.

[0139] By making the shell into a special-shaped design, the special-shaped shell can reduce the thickness of the projection host 210 part without affecting the structural strength and function, so that the intermediate load projection host 210 part can be made thinner. Since the thickness of the intermediate load projection host 210 part is reduced, the overall thickness of the equipment after final installation will also be reduced accordingly; in addition, by using belt drive to replace the existing cross-shaped coupling transmission method, the axial movement and misalignment problems of the coupling during assembly and operation can be effectively solved, and a more stable transmission effect can be provided, reducing or eliminating the axial movement gap, thereby avoiding the problem of picture offset, and at the same time reducing the noise problem caused by the friction between the coupling components due to the misalignment during rotation, thereby improving the accuracy and stability of the equipment, reducing friction and noise problems, and helping to extend the service life of the equipment, reduce maintenance costs, and enhance user experience.

[0140] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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 application.

[0141] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pan / tilt head for carrying a projection host, characterized in that: The pan / tilt platform comprises: A housing, wherein the housing has a bearing portion, and the projection host is disposed on the bearing portion; A driving unit, the driving unit comprising a driving member and a belt transmission member, wherein a driving end of the driving member is drivingly connected to the belt transmission member to drive the belt transmission member to rotate; A moving unit, the moving unit comprising a moving member, a first end of the moving member being movably connected to a driving end of the belt driving member, a second end of the moving member being connected to the bearing portion, and the moving member being configured to drive the bearing portion to move along a first direction under the drive of the driving member; The moving member is spaced apart from the driving member along a second direction, wherein the first direction is a width direction of the shell, and the second direction is a length direction of the shell.

2. The pan / tilt head according to claim 1, characterized in that: The belt transmission member has a first transmission end and a second transmission end, and the first transmission end and the second transmission end are extended along the second direction; The first transmission end is transmission-connected to the driving end of the driving member, and the second transmission end is transmission-connected to the end of the moving member.

3. The pan / tilt head according to claim 2, characterized in that: The belt transmission member includes a driving wheel, a driven wheel and a transmission belt, wherein the transmission belt is connected between the driving wheel and the driven wheel, the driving wheel is connected to the output shaft of the driving member, and the driven wheel is rotationally connected to the moving member.

4. The pan / tilt head according to any one of claims 1 to 3, characterized in that: The moving unit further comprises a first sliding member and a first guide rail, wherein a first end of the first sliding member is slidably connected to the moving member, and a second end of the first sliding member is fixedly connected to the bearing portion; The first guide rail is arranged on the housing, and the first sliding member is sleeved on the first guide rail.

5. The pan / tilt head according to claim 4, characterized in that: The moving unit further comprises a second sliding member and a second guide rail, wherein the first sliding member and the second sliding member are respectively located at opposite sides of the housing along the second direction; The second guide rail is arranged on the housing, and the second sliding member is sleeved on the second guide rail.

6. The pan / tilt head according to claim 5, characterized in that: The housing comprises an upper shell and a lower shell, the upper shell is movably arranged relative to the lower shell, and the bearing portion is located on the upper shell; The first sliding member and the second sliding member are both arranged on the upper shell, and the first guide rail and the second guide rail are both arranged on the lower shell.

7. The pan / tilt head according to claim 6, characterized in that: It also includes a connecting unit, the connecting unit includes a first connecting member and a second connecting member, the end of the first guide rail has a first positioning portion, the first positioning portion is provided with a first connecting hole, the side wall of the lower shell has a second positioning portion, the second positioning portion is provided with a second connecting hole, the first connecting hole and the second connecting hole are arranged at intervals along the third direction, the structures of the first positioning portion and the second positioning portion match each other, and the first connecting member passes through the first connecting hole and the second connecting hole in sequence to connect the first guide rail and the lower shell; The end of the second guide rail has a third positioning portion, and a third connecting hole is formed on the third positioning portion. The side wall of the lower shell has a fourth positioning portion, and a fourth connecting hole is formed on the fourth positioning portion. The third connecting hole and the fourth connecting hole are arranged at intervals along the third direction. The structures of the third positioning portion and the fourth positioning portion match each other. The second connecting member passes through the third connecting hole and the fourth connecting hole in sequence, so that the second guide rail is connected to the lower shell. Wherein, the third direction is the thickness direction of the shell.

8. The pan / tilt head according to claim 4, characterized in that: The driving member is a driving motor, and the moving member is a lead screw; The first sliding member has a threaded hole matching the lead screw, and when the lead screw rotates around its own axis, the first sliding member is driven to move along the axial direction of the lead screw.

9. A pan-tilt head for carrying a projection host, characterized in that: The pan / tilt platform comprises: A housing, wherein the projection host is arranged on the housing; A driving unit, the driving unit comprising a driving member and a belt transmission member, wherein a driving end of the driving member is drivingly connected to the belt transmission member to drive the belt transmission member to rotate; A moving member, the moving member is disposed between the belt transmission member and the housing, and the moving member is configured to drive the housing to move along a first direction under the drive of the driving member; The moving member is spaced apart from the driving member along a second direction, and an angle is formed between the first direction and the second direction.

10. A projection device, characterized in that: It comprises a projection host and the pan-tilt head according to any one of claims 1 to 9, wherein the projection host is mounted on the pan-tilt head, and the pan-tilt head is configured to drive the projection host to move.

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