Electric PTZ bracket and projection equipment

Abstract

The present invention discloses an electric pan-tilt bracket and a projection device, which includes a bracket housing, a driving member, a stacked gear set, a Hall sensor, a gear plate and a chassis; the stacked gear set includes a first gear, a second gear and a magnet, the first gear and the second gear are stacked and transmission-connected, the first gear and the second gear are rotationally connected to the bracket housing, the magnet is fixedly connected to the first gear and / or the second gear, the Hall sensor is arranged on the bracket housing, and the Hall sensor is located in the axial direction of the stacked gear set; the driving member is arranged on the bracket housing and transmission-connected with the first gear, the gear plate is meshed with the second gear, the gear plate is rotationally connected with the bracket housing and the bottom is connected with the chassis, and the chassis is located at the bottom of the bracket housing. The electric pan-tilt bracket and the projection device disclosed by the present invention only need to modify the stacked gear set with a small size and a simple transmission method, which greatly reduces the interference with the structure and is more convenient to assemble.

Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to an electric pan / tilt stand and projection equipment. Background Art

[0002] With the development of projector technology, users' demand for automated projection functions has also increased. In particular, since the projection equipment often needs to be tilted toward the projection screen, the projected image will be deformed into a trapezoidal shape, which greatly affects the user's viewing experience. Therefore, the general method is to add an electric pan / tilt to the projection equipment to drive the projection optical machine to rotate relative to the bracket, so that the projection direction of the optical machine reaches a suitable projection angle, so that the shape of the projected image can be improved.

[0003] In order to more accurately realize interactive control based on the rotation angle of the gimbal, an optocoupler device or a Hall sensor can generally be set on the gear plate to accurately detect the rotation angle of the gimbal. However, since the transmission structure between the gear plate and the stacked structure is relatively complex, setting a magnet on it is likely to cause interference with the stacked structure and the structural height cannot be compressed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes an electric pan-tilt head bracket and projection equipment, which only requires the modification of a stacked gear set with a small size and a simple transmission method, greatly reducing interference with the structure and making assembly more convenient.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention discloses an electric pan / tilt bracket, comprising a bracket housing, a driving member, a stacked gear group, a Hall sensor, a gear plate and a chassis; the stacked gear group comprises a first gear, a second gear and a magnet, the first gear and the second gear are stacked and transmission connected, the first gear and the second gear are rotationally connected to the bracket housing, the magnet is fixedly connected to the first gear and / or the second gear, the Hall sensor is arranged on the bracket housing, and the position of the Hall sensor is located in the axial direction of the stacked gear group; the driving member is arranged on the bracket housing and transmission connected to the first gear, the gear plate is meshed with the second gear, the gear plate is rotationally connected to the bracket housing and the bottom is connected to the chassis, and the chassis is located at the bottom of the bracket housing.

[0007] Preferably, the magnet is disposed between the first gear and the second gear.

[0008] Preferably, the Hall sensor is located in the axial direction of the first gear and the second gear, and the first gear is closer to the Hall sensor than the second gear. A receiving groove is provided on the side of the second gear close to the first gear, and at least part of the magnet is placed in the receiving groove. The second gear is made of magnetic shielding material.

[0009] Preferably, a buckle and a support platform are provided on the side of the first gear close to the second gear, the magnet is in an annular structure, the magnet surrounds the support platform and is fixed by the buckle, the height of the support platform is higher than the height of the buckle and the magnet, and the first gear and the second gear are offset against each other through the support platform.

[0010] Preferably, the support platform is provided with a slot at an off-axis position, and a blocking block is provided at an off-axis position on a side of the second gear close to the first gear, and the blocking block is correspondingly engaged in the slot to limit relative rotation between the first gear and the second gear.

[0011] Preferably, a receiving groove is provided on a side of the second gear close to the first gear, and at least a portion of the support platform and the magnet extend into the receiving groove.

[0012] Preferably, the Hall sensor is located in the axial direction of the first gear and the second gear, and the first gear is closer to the Hall sensor than the second gear, and the magnet is arranged on a side of the first gear close to the Hall sensor.

[0013] Preferably, the stacked gear set also includes a pressure plate and a fastener, a fastening column is provided on one side of the pressure plate, the fastening column passes through the second gear and the first gear, the first gear and the second gear are rotatably mounted on the fastening column, and the fastener is locked into the end of the fastening column to clamp the second gear and the first gear on the pressure plate, and the pressure plate is fixedly connected to the bracket shell.

[0014] Preferably, the electric pan / tilt bracket further includes a fixed seat, a bearing, a first damping plate and a second damping plate, the fixed seat is fixedly connected to the bracket shell and the fixed seat is fixedly connected to the first wall surface of the bearing, the gear plate is fixedly connected to the second wall surface of the bearing, and the first wall surface and the second wall surface of the bearing are rotationally connected; the first damping plate and the second damping plate are dampingly connected, the first damping plate is fixedly connected to the gear plate, and the second damping plate is fixedly connected to the chassis.

[0015] In a second aspect, the present invention discloses a projection device, comprising a projector body and the electric pan / tilt head bracket described in the first aspect, wherein the projector body is rotatably connected to the bracket housing.

[0016] Compared with the prior art, the beneficial effect of the present invention is that the electric pan-tilt head bracket and projection equipment proposed by the present invention, in which a magnet is arranged in a stacked gear set used for transmission between a driving member and a gear plate to cooperate with a Hall sensor, only needs to modify the stacked gear set with a small size and a simple transmission method, which greatly reduces interference with the structure and makes assembly more convenient.

[0017] In a further embodiment, the present invention also has the following beneficial effects:

[0018] (1) A receiving groove is provided on a side of the second gear close to the first gear, so that at least part of the magnet and the support platform can extend into the receiving groove, thereby compressing the overall height of the stacked gear set.

[0019] (2) The support platform provided on the first gear is higher than the buckle and the magnet provided thereon, so that the first gear and the second gear can be abutted against each other only through the support platform, thereby avoiding damage to the buckle and the magnet.

[0020] (3) The Hall sensor is located in the axial direction of the first gear and the second gear, and the first gear is closer to the Hall sensor than the second gear. The second gear is made of magnetic shielding material. On the one hand, the magnet can be closer to the Hall sensor, the detection sensitivity is higher, and the angle recognition is more accurate; on the other hand, the magnetic field of the magnet can be constrained in the axial direction and concentrated on the side close to the Hall sensor to act on the Hall sensor, without leaking too much through the first gear to affect the driving component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic diagram of the structure of an electric pan / tilt bracket according to a first embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the electric pan / tilt bracket;

[0023] Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle;

[0024] Figure 4 Figure 2 Exploded diagram of the upper and middle shell and some internal structures;

[0025] Figure 5 yes Figure 2 An exploded schematic diagram of the stacked gear set;

[0026] Figure 6 yes Figure 2 The structural diagram of the middle stacked gear set;

[0027] Figure 7 yes Figure 1 A cross-sectional diagram of the electric pan / tilt bracket;

[0028] Figure 8 yes Figure 7 The enlarged schematic diagram of point B in the middle;

[0029] Fig. 9 yes Figure 2 An exploded schematic diagram of another perspective of the stacked gear set;

[0030] Fig.10 is a cross-sectional schematic diagram of the upper shell and internal structure of the electric pan / tilt bracket according to the second embodiment of the present invention;

[0031] Fig.11 yes Fig.10 The enlarged schematic diagram of the center C;

[0032] Fig.12 A schematic diagram of the structure of a stacked gear set in an electric pan / tilt bracket according to a second embodiment of the present invention;

[0033] Fig.13 yes Fig.12 An exploded schematic diagram of the stacked gear set;

[0034] Fig.14 yes Fig.12 An exploded schematic diagram of another perspective of the stacked gear set;

[0035] Description of Figure Numbers:

[0036] 100. Electric PTZ bracket;

[0037] 10. bracket housing; 11. upper housing; 12. lower housing;

[0038] 20. Driving parts;

[0039] 30. stacked gear set; 31. first gear; 311. buckle; 312. support platform; 313. first receiving groove; 314. slot; 32. second gear; 321. block; 322. second receiving groove; 33. magnet; 34. pressure plate; 341. fastening column; 35. fastener;

[0040] 40. Hall sensor;

[0041] 50. Gear plate;

[0042] 60. Chassis;

[0043] 71. First damping disc; 72. Second damping disc. DETAILED DESCRIPTION

[0044] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0045] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit / signal communication.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 cannot be understood as a limitation on the present invention.

[0047] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] Embodiment 1

[0049] like Figure 1 As shown, the first embodiment of the present invention discloses an electric pan-tilt bracket 100, which is used to support display devices such as projectors and display screens, and is combined with Figure 2 The electric pan / tilt bracket 100 includes a bracket housing 10, a driving member 20, a stacked gear set 30, a Hall sensor 40, a gear plate 50 and a chassis 60; the bracket housing 10 includes an upper shell 11 and a lower shell 12 connected to each other, and the upper shell 11 and the lower shell 12 are installed to enclose to form a receiving cavity for placing components such as the driving member 20, the stacked gear set 30, the Hall sensor 40, the gear plate 50, etc.; combined Figure 3 and Figure 4The stacked gear set 30 includes a first gear 31, a second gear 32 and a magnet 33. The first gear 31 and the second gear 32 are stacked and transmission-connected. The first gear 31 and the second gear 32 are rotationally connected to the upper shell 11. The magnet 33 is fixedly connected to the first gear 31 and / or the second gear 32. The Hall sensor 40 is disposed on the upper shell 11, and the Hall sensor 40 is located in the axial direction of the stacked gear set 30. The driving member 20 is disposed on the upper shell 11 and transmission-connected to the first gear 31. The gear plate 50 is meshed with the second gear 32. The gear plate 50 is rotationally connected to the upper shell 11 and the bottom is connected to the chassis 60. The chassis 60 is located at the bottom of the lower shell 12 and is used to support the entire machine on the table.

[0050] In the present invention, the magnet 33 is arranged in the stacked gear set 30 for transmission between the driving member 20 and the gear plate 50 to cooperate with the Hall sensor 40. Only the stacked gear set 30 with a small size and a simple transmission method needs to be modified, which greatly reduces the interference with the structure and makes assembly more convenient.

[0051] Combination Figure 5 and Figure 6 The stacked gear set 30 further includes a pressing plate 34 and a fastener 35. A fastening column 341 is provided on one side of the pressing plate 34. The fastening column 341 passes through the second gear 32 and the first gear 31. The first gear 31 and the second gear 32 are rotatably sleeved on the fastening column 341, and the end surface of the fastening column 341 is exposed to the first gear 31, so that the fastener 35 can be locked into the end of the fastening column 341 to clamp the second gear 32 and the first gear 31 on the pressing plate 34. Figure 7 and Figure 8 , the first gear 31 , the second gear 32 and the magnet 33 can be integrally fixedly connected to the upper shell 11 along with the pressure plate 34 .

[0052] In this embodiment, the magnet 33 is disposed between the first gear 31 and the second gear 32. Furthermore, a buckle 311 and a support platform 312 are provided on one side of the first gear 31 close to the second gear 32. Figure 5 and Fig. 9, the support platform 312 is provided with a slot 314 at an off-axis position, and a block 321 is provided at an off-axis position on the side of the second gear 32 close to the first gear 31. The block 321 is correspondingly engaged in the slot 314 to achieve circumferential restriction to prevent relative rotation between the first gear 31 and the second gear 32, wherein the off-axis position refers to the position of the non-central axis. The magnet 33 is annular in structure, and a first receiving groove 313 is formed between the buckle 311 and the support platform 312 to accommodate the magnet 33 of the annular structure. The buckle 311 can be deformed to load and reset the magnet 33, and finally the magnet 33 surrounds the support platform 312 and is fixed by the buckle 311, so that the first gear 31, the second gear 33 and the magnet 33 rotate synchronously. The height of the support platform 312 is higher than the height of the buckle 311 and the magnet 33, so that the first gear 31 and the second gear 32 are only offset by the support platform 312, avoiding damage to the buckle 311 and the magnet 33.

[0053] The Hall sensor 40 is located in the axial direction of the first gear 31 and the second gear 32, and the first gear 31 is closer to the Hall sensor 40 than the second gear 32, so that the magnet 33 can be closer to the Hall sensor 40, the detection sensitivity is higher, and the angle recognition is more accurate. A second receiving groove 322 is provided on the side of the second gear 32 close to the first gear 31, and the support platform 312 and at least part of the magnet 33 are placed in the second receiving groove 322 to minimize the height of the entire stacked gear set 30. Figure 8 As shown, in this embodiment, the Hall sensor 40 is fixed on the upper shell 11 and is vertically opposite to the first gear 31 and the second gear 32. The Hall sensor 40 is adjacent to and spaced from the first gear 31, so that the magnetic field of the magnet 33 can be mainly constrained in the axial direction to act on the Hall sensor 40, and will not be distributed in other directions to affect other electronic components; further, the first gear 31 is made of plastic, and the second gear 32 is made of magnetic shielding material, so that the magnetic field of the magnet 33 can be concentrated on the side close to the Hall sensor 40, and will not leak too much through the first gear 31 to affect the driving member 20. The magnet 33 can be a magnet, for example.

[0054] Refer to Figure 2The electric pan / tilt bracket also includes a fixed seat, a bearing, a first damping plate 71 and a second damping plate 72, wherein the driving member 20 may be a motor, for example, the output end of the motor is meshed with the first gear 31, and the second gear is meshed with the gear plate 50, the fixed seat is fixedly connected to the upper shell 11 and the fixed seat is fixedly connected to the first wall surface of the bearing, the gear plate 50 is fixedly connected to the second wall surface of the bearing, the first wall surface of the bearing and the second wall surface are rotationally connected, and the damping is almost negligible; the first damping plate 71 and the second damping plate 72 are dampingly connected, the first damping plate 71 is fixedly connected to the bottom of the gear plate 50, and the second damping plate 72 is fixedly connected to the chassis 60. In some embodiments, the bearing is a radial bearing divided into an inner part and an outer part, and the inner part and the outer part of the bearing are rotationally connected by a ball, wherein the first wall surface is the inner wall surface of the bearing, and the second wall surface is the outer wall surface of the bearing; in other embodiments, the bearing may also be an axial bearing divided into an upper part and a lower part, and the upper part and the lower part of the bearing are rotationally connected by a ball.

[0055] Embodiment 2

[0056] The second embodiment of the present invention discloses a projection device, including a projector body and the electric pan / tilt bracket 100 in the first embodiment, wherein the projector body is rotatably connected to the bracket housing 10 .

[0057] Embodiment 3

[0058] like Fig.10 and Fig.11 As shown, the electric pan / tilt bracket disclosed in Embodiment 3 of the present invention is different from Embodiment 1 only in that: in Embodiment 1, the magnet 33 is arranged between the first gear 31 and the second gear 32, while in this embodiment, the magnet 33 is arranged on the side of the first gear 31 away from the second gear 32. Specifically, the Hall sensor 40 is located in the axial direction of the first gear 31 and the second gear 32, and the first gear 31 is closer to the Hall sensor 40 than the second gear 32. The magnet 33 is arranged on the side of the first gear 31 close to the Hall sensor 40. In this embodiment, the magnet 33 is further close to the Hall sensor 40, the detection sensitivity is further improved, and the angle recognition can also be more accurate.

[0059] Combination Figure 12 to Figure 14 The first gear 31 is provided with a protruding buckle 311 on the side away from the second gear 32, and a first receiving groove 313 is formed between the buckles 311. The magnet 33 of the annular structure is accommodated in the first receiving groove 313 and is caught by the buckle 311. The first gear 31 and the second gear 32 are still abutted against each other through the support platform 312, and the circumferential rotation is limited by the block 321 and the slot 314. The support platform 312 partially extends into the second receiving groove 322 of the second gear 32 to minimize the overall height of the stacked gear set 30.

[0060] The other structures in this embodiment are similar to those in the first embodiment and will not be described in detail here.

[0061] Embodiment 4

[0062] Embodiment 4 of the present invention discloses a projection device, including a projector body and the electric pan / tilt bracket 100 in Embodiment 3, wherein the projector body is rotatably connected to the bracket housing 10 .

[0063] The background section of the present invention may contain background information about the problem or environment of the present invention, rather than describing the prior art by others. Therefore, the content contained in the background section is not an admission by the applicant that the prior art is available.

[0064] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of mutual contradiction, the technical personnel in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope defined by the attached claims.

Claims

1. An electric pan / tilt bracket, characterized in that: It includes a bracket housing, a driving member, a stacked gear set, a Hall sensor, a gear plate and a chassis; The stacked gear set includes a first gear, a second gear and a magnet, the first gear and the second gear are stacked and transmission-connected, the first gear and the second gear are rotationally connected to the bracket housing, the magnet is fixedly connected to the first gear and / or the second gear, the Hall sensor is arranged on the bracket housing, and the Hall sensor is located in the axial direction of the stacked gear set; The driving member is arranged on the bracket shell and is transmission-connected with the first gear, the gear plate is meshed with the second gear, the gear plate is rotationally connected with the bracket shell and the bottom is connected with the chassis, and the chassis is located at the bottom of the bracket shell.

2. The electric pan / tilt bracket according to claim 1, characterized in that: The magnet is disposed between the first gear and the second gear.

3. The electric pan / tilt bracket according to claim 2, characterized in that: The Hall sensor is located in the axial direction of the first gear and the second gear, and the first gear is closer to the Hall sensor than the second gear. A receiving groove is provided on a side of the second gear close to the first gear, and at least a portion of the magnet is placed in the receiving groove. The second gear is made of magnetic shielding material.

4. The electric pan / tilt bracket according to claim 2, characterized in that: A buckle and a support platform are provided on one side of the first gear close to the second gear. The magnet is in a ring structure. The magnet surrounds the support platform and is fixed by the buckle. The height of the support platform is higher than the height of the buckle and the magnet. The first gear and the second gear are offset against each other through the support platform.

5. The electric pan / tilt bracket according to claim 4, characterized in that: The support platform is provided with a slot at an off-axis position, and a blocking block is provided at an off-axis position on a side of the second gear close to the first gear, and the blocking block is correspondingly engaged in the slot to limit relative rotation between the first gear and the second gear.

6. The electric pan / tilt bracket according to claim 4, characterized in that: A receiving groove is provided on a side of the second gear close to the first gear, and at least a portion of the support platform and the magnet extends into the receiving groove.

7. The electric pan / tilt bracket according to claim 1, characterized in that: The Hall sensor is located in the axial direction of the first gear and the second gear, and the first gear is closer to the Hall sensor than the second gear. The magnet is arranged on a side of the first gear close to the Hall sensor.

8. The electric pan / tilt stand according to claim 1, characterized in that: The stacked gear set also includes a pressure plate and a fastener, a fastening column is provided on one side of the pressure plate, the fastening column passes through the second gear and the first gear, the first gear and the second gear are rotatably mounted on the fastening column, and the fastener is locked into the end of the fastening column to clamp the second gear and the first gear on the pressure plate, and the pressure plate is fixedly connected to the bracket shell.

9. The electric pan / tilt bracket according to claim 1, characterized in that: It also includes a fixed seat, a bearing, a first damping plate and a second damping plate, wherein the fixed seat is fixedly connected to the bracket shell and the fixed seat is fixedly connected to the first wall surface of the bearing, the gear plate is fixedly connected to the second wall surface of the bearing, and the first wall surface and the second wall surface of the bearing are rotationally connected; the first damping plate and the second damping plate are dampingly connected, the first damping plate is fixedly connected to the gear plate, and the second damping plate is fixedly connected to the chassis.

10. A projection device, characterized in that: It comprises a projector body and the electric pan / tilt head bracket according to any one of claims 1 to 9, wherein the projector body is rotatably connected to the bracket shell.

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