A projector stand and a projector

Abstract

The utility model relates to the technical fields of projection support especially, a kind of projector support and projector, its technical scheme main point includes: first frame body;Second frame body, with the first frame body sliding cooperation;Rack, setting in the first frame body;Gear ring, rotation setting in the second frame body, the outer edge of the gear ring has first meshing tooth, the inner edge of the gear ring has multiple second meshing tooth, the first meshing tooth is engaged with the rack;And limit gear, fixedly set in the second frame body, and located in the gear ring, the limit gear has third meshing tooth, when the first frame body and the second frame body are mutually displaced, the third meshing tooth is sequentially connected and cooperated to different second meshing tooth, for adjusting the mutual position of the first frame body and the second frame body, the present application solves the problem that the existing support exists and occupies internal space larger problem of low adjustment accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of projection brackets, and more particularly to a projector bracket and a projector. Background Technology

[0002] A projector is a display device that amplifies images or video signals through an optical system and projects them onto a screen, wall, or other flat surface. Its core function is to convert small image sources into large visible images, and it is widely used in education, office, home entertainment, cinema, exhibitions, and other scenarios.

[0003] Depending on the projection scenario, the projector's height needs to be adjusted using a stand to achieve a good projection effect. The projector stand achieves height adjustment by operating the corresponding adjustment components. Common adjustment components are usually either screw-type or snap-on type. Screw-type adjustment components adjust the height by rotating a screw, while snap-on adjustment components adjust the height by locking the stand at a certain height.

[0004] However, the direct adjustment methods in the existing technology still have many shortcomings. For example, the screw-type adjustment component has a large structural space, while the snap-on adjustment component can only stop at a few specific positions, affecting the adjustment accuracy. Therefore, there is still a lack of a bracket solution in the existing technology that can be compact in structure and can achieve high-precision hovering, and the existing technology needs to be improved.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a projector stand and a projector to solve the problems of low adjustment accuracy and large internal space occupation in the prior art.

[0007] To achieve the above objectives, in a first aspect, this utility model provides a projector bracket using the following technical solution:

[0008] A projector stand, comprising:

[0009] First frame;

[0010] The second frame is slidably engaged with the first frame;

[0011] A rack is disposed in the first frame;

[0012] A gear ring is rotatably mounted on the second frame. The outer edge of the gear ring has a first meshing tooth, and the inner edge of the gear ring has a plurality of second meshing teeth. The first meshing tooth meshes with the rack.

[0013] And a limiting gear, which is fixedly disposed in the second frame and located in the gear ring. The limiting gear has a third meshing tooth. When the first frame and the second frame are displaced relative to each other, the third meshing tooth is sequentially engaged with different second meshing teeth to adjust the relative positions of the first frame and the second frame.

[0014] Preferably, the second frame is provided with a mounting shaft, the gear ring is rotatably mounted on the mounting shaft, and the limiting gear is fixedly mounted on the mounting shaft.

[0015] Preferably, the mounting shaft includes:

[0016] The shaft has one end connected to the second frame and the other end has a threaded hole. The gear ring has a first mounting hole. The shaft passes through the first mounting hole, and the wall of the first mounting hole slides against the shaft.

[0017] The limiting gear has a second mounting hole, and the screw passes through the first mounting hole and the second mounting hole and is threaded into the threaded hole. The screw is used to fix the limiting gear on the mounting shaft.

[0018] Preferably, the limiting gear includes:

[0019] The mounting part is used for rotatable connection with the second frame;

[0020] The outer ring portion surrounds the outer periphery of the mounting portion, and the third meshing tooth is disposed on the outer edge of the outer ring portion;

[0021] The connecting portion is connected to the outer ring portion and the mounting portion respectively, so that a hollow cavity is formed between the mounting portion and the outer ring portion.

[0022] Preferably, the cavity wall of the hollow cavity has a corrugated groove, and the corrugated groove and the third meshing tooth are located on the inner and outer sides of the outer ring, respectively.

[0023] Preferably, the limiting gear is an incomplete gear, and the third meshing teeth are in multiple sets, wherein two sets of the third meshing teeth are distributed on opposite sides of the limiting gear.

[0024] Preferably, the first frame has a receiving cavity, the second frame is located within the receiving cavity, and the first frame and the second frame are located on the same plane.

[0025] Preferably, a clearance opening is provided through one side of the second frame, the rack is disposed inside the first frame, the gear ring and the limiting gear are disposed inside the second frame, and the first meshing tooth on the gear ring meshes with the rack through the clearance opening.

[0026] Preferably, the first frame has a receiving groove, and the rack is disposed in the receiving groove.

[0027] Secondly, this utility model provides a projector with the following technical solution:

[0028] A projector, including the projector stand described above.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The projector bracket provided by this utility model features an integrated design of rack and gear ring, which is characterized by its small overall size. By further placing the limiting gear inside the gear ring, the structural layout can be further optimized, adapting to the narrow space inside the projector bracket and improving the compactness of the structure. On this basis, the limiting gear fixed on the second frame can provide damping support for the gear. Since the gear ring has multiple adjustment positions, it can be locked at multiple rotation angles. By utilizing the meshing relationship between the gear ring and the rack, the relative displacement between the first and second frames can be precisely controlled, and the adjustment accuracy is significantly optimized and improved. The problems of insufficient structural compactness and insufficient adjustment accuracy are solved.

[0031] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the projector bracket provided in Embodiment 1 of this utility model;

[0034] Figure 2 This is a structural schematic diagram of the projector bracket provided in Embodiment 1 of this utility model from another perspective;

[0035] Figure 3 This is a schematic diagram of the assembly relationship between the gear ring, the limiting gear, and the mounting shaft provided in Embodiment 1 of this utility model;

[0036] Figure 4 This is a schematic diagram of the limiting gear provided in Embodiment 1 of this utility model;

[0037] Figure 5 This is a schematic diagram of the assembly relationship between the first frame and the second frame provided in Embodiment 1 of this utility model;

[0038] Figure 6 yes Figure 5 Enlarged view of part A in the middle.

[0039] Figure label:

[0040] 1. First frame; 11. Receiving cavity; 12. Receiving groove;

[0041] 2. Second frame; 21. Clearance opening;

[0042] 3. Gear rack;

[0043] 4. Gear ring; 41. First meshing tooth; 42. Second meshing tooth; 43. First mounting hole;

[0044] 5. Limiting gear; 51. Mounting part; 511. Second mounting hole; 52. Outer ring part; 521. Corrugated groove; 53. Connecting part;

[0045] 6. Third meshing tooth;

[0046] 7. Mounting shaft; 71. Shaft body; 72. Screw. Detailed Implementation

[0047] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] In the description of this utility model, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component that is centrally positioned therein. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be a component that is centrally positioned therein.

[0049] Furthermore, terms such as "long," "short," "inner," and "outer" indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of this utility model.

[0050] The following is in conjunction with the appendix Figure 1-6 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0051] Example 1:

[0052] Please refer to Figure 1 and Figure 2 This utility model embodiment provides a projector bracket for adjusting the hovering height of the projector, including a first frame 1, a second frame 2, a rack 3, a gear ring 4, and a limiting gear 5.

[0053] The second frame 2 is slidably engaged with the first frame 1. The rack 3 is disposed on the first frame 1, and the gear ring 4 is rotatably disposed on the second frame 2. The outer edge of the gear ring 4 has a first meshing tooth 41, which meshes with the rack 3. During the sliding process between the first frame 1 and the second frame 2, the first frame 1 can drive the rack 3 to move back and forth, and push the gear ring 4 to rotate through the first meshing tooth 41.

[0054] At the same time, refer to Figure 2 and Figure 3 The inner edge of the gear ring 4 has multiple second meshing teeth 42. It can be understood that the multiple second meshing teeth 42 are arranged sequentially and spaced apart along the circumferential direction of the gear ring 4 on the inner edge of the gear ring 4. The specific number of second meshing teeth 42 can be adjusted according to actual needs and is not specifically limited here. In addition, the limiting gear 5 is fixedly set in the second frame 2 and located inside the gear ring 4. The limiting gear 5 has a third meshing tooth 6.

[0055] When the first frame 1 and the second frame 2 are displaced relative to each other, the gear ring 4 rotates, the limiting gear 5 is stationary relative to the gear ring 4, and different second meshing teeth 42 pass through the third meshing teeth 6 in sequence. During this process, the third meshing teeth 6 engage with different second meshing teeth 42 in sequence, thereby applying damping force to the gear ring 4 at multiple different angles. With the mutual cooperation of the second meshing teeth 42 and the third meshing teeth 6, the relative positions of the first frame 1 and the second frame 2 are adjusted.

[0056] Based on the above technical solution, the integrated design of rack 3 and gear ring 4 has the feature of small overall volume. By further setting the limiting gear 5 inside the gear ring 4, it is equivalent to forming a planetary gear structure, which can further optimize the structural layout and make the structure more compact. Moreover, during the rotation of gear ring 4, gear ring 4 has multiple second meshing teeth 42. With the cooperation of the second meshing teeth 42 and the third meshing teeth 6, it is equivalent to forming multiple fine gears that can be continuously stopped. The adjustment accuracy between the first frame 1 and the second frame 2 is significantly optimized and improved. It can be understood that, due to the multiple adjustment gears, the stepless adjustment function is further obtained, and the problems of insufficient structural compactness and low adjustment accuracy are solved simultaneously.

[0057] Continue to refer to Figure 2 and Figure 3 The second frame 2 is provided with a mounting shaft 7, the gear ring 4 is rotatably mounted on the mounting shaft 7, and the limit gear 5 is fixedly mounted on the mounting shaft 7.

[0058] Specifically, in some embodiments, the mounting shaft 7 is integrally connected with the second frame 2 to obtain better connection strength. Thus, by simultaneously setting the gear ring 4 and the limiting gear 5 on the mounting shaft 7, the gear ring 4 and the limiting gear 5 can be integrated together, resulting in a more compact structure and ensuring good concentricity between the two, thereby optimizing and improving structural accuracy.

[0059] In other embodiments, the gear ring 4 and the limiting gear 5 can also be set separately, for example, by setting two mounting shafts 7 and setting the gear ring 4 and the limiting gear 5 separately on the two mounting shafts 7. In this case, the limiting gear 5 can also provide damping force to the gear ring 4. It is understood that no matter how the gear ring 4 and the limiting gear 5 are set, they should be included in the scope of interpretation of this application. In this embodiment, the gear ring 4 and the limiting gear 5 are set on the same mounting shaft 7 as an example.

[0060] Furthermore, the mounting shaft 7 includes a shaft body 71 and a screw 72. One end of the shaft body 71 is connected to the second frame 2, and typically, the shaft body 71 is integrally connected to the second frame 2. Meanwhile, the other end of the shaft body 71 has a threaded hole.

[0061] The gear ring 4 has a first mounting hole 43, and the shaft 71 passes through the first mounting hole 43. The first mounting hole 43 passes through the opposite sides of the gear ring 4. When the gear ring 4 is installed, the shaft 71 passes through the first mounting hole 43, and the hole wall of the first mounting hole 43 slides against the shaft 71, so that the gear ring 4 can rotate with the shaft 71 as the rotation axis.

[0062] It is understood that the gear ring 4 can be rotatably mounted on the second frame 2 directly or indirectly during actual installation. In the above embodiment, the gear ring 4 is indirectly rotatably mounted on the second frame 2 through the mounting shaft 7. In other embodiments, the gear ring 4 can also be directly rotatably mounted on the second frame 2. The specific installation method of the gear ring 4 is not limited here.

[0063] Based on this, the limiting gear 5 has a second mounting hole 511, and the screw 72 passes through the first mounting hole 43 and the second mounting hole 511 and is threaded into the threaded hole. The screw 72 is used to fix the limiting gear 5 on the mounting shaft 7.

[0064] Specifically, in some embodiments, the shaft 71 is configured as a stepped shaft. When the gear ring 4 is installed on the shaft 71, the step of the shaft 71 is used to position one side of the gear ring 4. On this basis, the limiting gear 5 is located at the end of the shaft 71 away from the second frame 2, and the limiting gear 5 is located on the side of the gear ring 4 away from the shaft 71 and abuts against the gear ring 4.

[0065] At this time, the screw 72 has a screw portion and a head provided at one end of the screw portion. The diameter of the screw head is larger than the diameter of the screw portion, and the screw portion has an external thread. By passing the screw 72 through the second mounting hole 511 and threading it into the threaded hole, the limiting gear 5 can be fixedly installed at the end of the shaft 71. The limiting gear 5 can limit the gear ring 4 to prevent the gear ring 4 from loosening. The gear ring 4 and the limiting gear 5 are installed stably and reliably.

[0066] Reference Figure 4 The limiting gear 5 includes a mounting part 51, an outer ring part 52, and a connecting part 53. The mounting part 51 is rotatably connected to the second frame 2, the outer ring part 52 surrounds the outer periphery of the mounting part 51, the third meshing tooth 6 is disposed on the outer edge of the outer ring part 52, and the connecting part 53 is connected to the outer ring part 52 and the mounting part 51 respectively, so that a hollow cavity is formed between the mounting part 51 and the outer ring part 52.

[0067] In some embodiments, the mounting portion 51 has a cylindrical structure, and a second mounting hole 511 is provided through the mounting portion 51. In addition, the outer ring portion 52 has a circular outline, and the inner diameter of the outer ring portion 52 is larger than the outer diameter of the mounting portion 51, so that the outer ring portion 52 surrounds the outer periphery of the mounting portion 51. The third meshing tooth 6 is integrally provided on the outer peripheral surface of the outer ring portion 52, and the connecting portion 53 is located between the outer ring portion 52 and the mounting portion 51. The connecting portion 53 is integrally connected to both the outer ring portion 52 and the mounting portion 51. Based on the above configuration, a gear structure with overall structural stability and lightweight structure is obtained.

[0068] It should be explained that the limiting gear 5 and the third meshing tooth 6 are made of materials with elastic deformation characteristics, such as plastic or some elastic metals. When the gear ring 4 drives the second meshing tooth 42 to rotate, the second meshing tooth 42 can push the third meshing tooth 6 to produce elastic deformation. Until a certain critical pressure value is reached, the deformation of the third meshing tooth 6 can allow the second meshing tooth 42 to pass over the third meshing tooth 6, so that the gear ring 4 can rotate. After the adjustment is completed, the third meshing tooth 6 elastically recovers and engages with the next second meshing tooth 42, realizing the locking point feel and finally obtaining the damping force. The first frame 1 and the second frame 2 finally come to a stop.

[0069] Furthermore, in order to facilitate the third meshing tooth 6 to undergo more stable plastic deformation, the cavity wall of the hollow cavity has a corrugated groove 521, and the corrugated groove 521 and the third meshing tooth 6 are located on the inner and outer sides of the outer ring portion 52, respectively.

[0070] Based on the above configuration, the corrugated groove 521 can reduce the overall thickness of the outer ring 52, which makes it easier for the third meshing tooth 6 to undergo elastic deformation, thus improving the operational feel of the structure.

[0071] In addition, the limiting gear 5 is an incomplete gear. It can be understood that an incomplete gear means that the number of teeth on its body is incomplete. The advantage of doing this is that when the limiting gear 5 and the gear ring 4 are engaged, there is a clearance, which is conducive to the deformation of the third meshing tooth 6 and reduces the difficulty of the third meshing tooth 6 switching between different second meshing teeth 42, thus optimizing and improving the user experience.

[0072] In some embodiments, the third meshing teeth 6 are in multiple groups, such as two or three groups, with each group having about three teeth, arranged sequentially. It is understood that if the number of teeth in the same group of third meshing teeth 6 is too small, it may lead to excessive deformation of the third meshing teeth 6, resulting in fatigue fracture. On the other hand, if the number of teeth in the same group of third meshing teeth 6 is too large, the damping force will also be too large, affecting the operating feel. Therefore, setting the number of teeth in the same group of third meshing teeth 6 to about three can achieve both good operating feel and good structural strength, and improve service life. It should be noted that there is no limitation on the specific number of groups of third meshing teeth 6. The specific number of teeth can be adjusted according to actual needs.

[0073] For example, the third meshing teeth 6 are in two sets, and the two sets of third meshing teeth 6 are distributed on opposite sides of the limiting gear 5. Based on the above arrangement, the limiting gear 5 can obtain balanced force, reduce the off-center load received by the limiting gear 5 during use, and make the limiting gear 5 structure more stable and less prone to deformation.

[0074] Reference Figure 5The first frame 1 has a receiving cavity 11, the second frame 2 is located in the receiving cavity 11, and the first frame 1 and the second frame 2 are located on the same plane.

[0075] In some embodiments, both the first frame 1 and the second frame 2 are planar frame structures, parallel to each other and with their outer edges forming closed-loop frame outlines connected end to end. The interior of the first frame 1 is hollow to form a receiving cavity 11, and the size of the first frame 1 is larger than the size of the second frame 2, allowing the second frame 2 to be placed within the receiving cavity 11 of the first frame 1. Furthermore, a guide structure, such as a guide sleeve, can be provided on the side of the second frame 2. By sliding the side of the first frame 1 onto the guide sleeve, the second frame 2 can move on the first frame 1. In this case, the second frame 2 is typically used to mount the projector, while the first frame 1 is used to fix it to a corresponding carrier, such as a wall, ceiling, or floor, or other equipment. The installation method of the first frame 1 is not limited here. When the second frame 2 moves on the first frame 1, the position of the projector can be adjusted.

[0076] Based on the above settings, on the one hand, users only need to pull the projector to adjust its position with the cooperation of the first frame 1 and the second frame 2. On the other hand, by setting the second frame 2 inside the accommodating cavity 11, the overall thickness of the bracket can be further reduced, and the structural compactness can be further optimized and improved.

[0077] Furthermore, referring to Figure 5 and Figure 6 A clearance opening 21 is provided through one side of the second frame 2. The rack 3 is located inside the first frame 1. The gear ring 4 and the limiting gear 5 are located inside the second frame 2. The first meshing tooth 41 on the gear ring 4 meshes with the rack 3 through the clearance opening 21.

[0078] By adopting the above scheme, the rack 3 can be hidden inside the first frame 1, and the gear ring 4 and the limiting gear 5 can be hidden inside the second frame 2. The structural layout is further optimized and the structural compactness is further optimized and improved.

[0079] Reference Figure 6 The first frame 1 has a receiving groove 12, and the rack 3 is disposed in the receiving groove 12. Specifically, the receiving groove 12 is recessed on the side of the first frame 1 facing the second frame 2, and the shape of the receiving groove 12 is adapted to the length profile of the rack 3. By placing the rack 3 in the receiving groove 12, the structural space can be further optimized, and the structural compactness can be further optimized and improved.

[0080] The projector stand provided in this embodiment has the following beneficial effects:

[0081] 1. The integrated design of limiting gear 5, rack 3 and gear ring 4 reduces the overall size by more than 30% compared with the traditional screw structure, making it suitable for the narrow space inside the projector and avoiding interference with other hardware.

[0082] 2. The interference between the gear ring 4 and the limiting gear 5 produces a uniform damping feel, making the adjustment process smooth and providing clear gear feedback;

[0083] 3. Modular design reduces the number of parts, and the 72 screw locking method facilitates disassembly and maintenance.

[0084] Example 2:

[0085] Based on Embodiment 1, features not explained in this embodiment will be explained in the embodiment and will not be repeated here. This embodiment provides a projector including the projector bracket in Embodiment 1, and also includes a projector body, which is mounted on the second frame 2.

[0086] Based on the above settings, a projector with a compact structure, high adjustment accuracy, and long service life was obtained.

[0087] Therefore, the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A projector stand, characterized in that, include: First frame (1); The second frame (2) is slidably engaged with the first frame (1); A rack (3) is disposed in the first frame (1); A gear ring (4) is rotatably mounted on the second frame (2). The outer edge of the gear ring (4) has a first meshing tooth (41), and the inner edge of the gear ring (4) has a plurality of second meshing teeth (42). The first meshing tooth (41) meshes with the rack (3). And a limiting gear (5) is fixedly set in the second frame (2) and located in the gear ring (4). The limiting gear (5) has a third meshing tooth (6). When the first frame (1) and the second frame (2) are displaced relative to each other, the third meshing tooth (6) is sequentially engaged with different second meshing teeth (42) to adjust the relative positions of the first frame (1) and the second frame (2).

2. The projector bracket according to claim 1, characterized in that, The second frame (2) is provided with a mounting shaft (7), the gear ring (4) is rotatably mounted on the mounting shaft (7), and the limiting gear (5) is fixedly mounted on the mounting shaft (7).

3. The projector bracket according to claim 2, characterized in that, The mounting shaft (7) includes: The shaft (71) is connected to the second frame (2) at one end and has a threaded hole at the other end. The gear ring (4) has a first mounting hole (43). The shaft (71) passes through the first mounting hole (43) and the hole wall of the first mounting hole (43) slides against the shaft (71). And a screw (72), the limiting gear (5) has a second mounting hole (511), the screw (72) passes through the first mounting hole (43) and the second mounting hole (511) and is threaded into the threaded hole, the screw (72) is used to fix the limiting gear (5) on the mounting shaft (7).

4. The projector bracket according to claim 1, characterized in that, The limiting gear (5) includes: Mounting part (51) is used for rotatable connection with the second frame (2); The outer ring portion (52) surrounds the outer periphery of the mounting portion (51), and the third meshing tooth (6) is disposed on the outer edge of the outer ring portion (52); The connecting part (53) is connected to the outer ring part (52) and the mounting part (51) respectively, so that a hollow cavity is formed between the mounting part (51) and the outer ring part (52).

5. The projector bracket according to claim 4, characterized in that, The cavity wall of the hollow cavity has a corrugated groove (521), and the corrugated groove (521) and the third meshing tooth (6) are located on the inner and outer sides of the outer ring (52), respectively.

6. The projector bracket according to claim 4, characterized in that, The limiting gear (5) is an incomplete gear, and the third meshing teeth (6) are in multiple sets, with two sets of the third meshing teeth (6) distributed on opposite sides of the limiting gear (5).

7. The projector bracket according to claim 1, characterized in that, The first frame (1) has a receiving cavity (11), the second frame (2) is located in the receiving cavity (11), and the first frame (1) and the second frame (2) are located on the same plane.

8. The projector bracket according to claim 1, characterized in that, A clearance opening (21) is provided through one side of the second frame (2). The rack (3) is located inside the first frame (1). The gear ring (4) and the limiting gear (5) are located inside the second frame (2). The first meshing tooth (41) on the gear ring (4) meshes with the rack (3) through the clearance opening (21).

9. The projector bracket according to claim 1, characterized in that, The first frame (1) has a receiving groove (12), and the rack (3) is disposed in the receiving groove (12).

10. A projector, characterized in that, Includes a projector stand as described in any one of claims 1-9.

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