Rotating shaft structure for starry sky lamp and starry sky lamp

Abstract

The utility model relates to the field of mechanical structures of starry sky projection lamps, in particular to a rotating shaft structure for a starry sky lamp and the starry sky lamp, and the rotating shaft structure comprises a rotating shaft body and an elastic compensation gasket, the elastic compensation gasket is cushioned between the limiting convex ring of the rotating shaft body and the inner side face of the shell in a close fit mode under the action of axial force so as to allow the elastic compensation gasket to generate axial elastic force, elastic damping connection between the limiting convex ring and the shell as well as between the limiting convex ring and the support arm is achieved, rigid connection is converted into elastic damping connection, and the service life of the rotating shaft is prolonged. Noise is remarkably reduced, and a good rotation damping feeling is achieved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical structure of star projection lamps, specifically to a rotating shaft structure for star lamps and a star lamp. Background Technology

[0002] The starry sky light's pivot is the core mechanical component connecting the base and the light body, directly affecting the light's rotation effect and lifespan. Its function is to connect the base and the light body, allowing the light body to rotate around its axis, thus projecting dynamic starry sky, nebula, or shooting star patterns onto the wall or ceiling at different angles, providing an adjustable starry sky projection effect.

[0003] Although starlight lamp hinges are widely used in ambient lighting, traditional hinges often use rigid connection structures when connecting to the lamp body and support arm, lacking axial compensation mechanisms. This makes the hinge prone to axial movement, leading to frequent collisions between the lamp body and the base, resulting in vibration and noise. Furthermore, the rigid connection of traditional hinges provides a poor user experience, and precise error control is required during assembly, resulting in a complex and costly structure. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This invention solves the above-mentioned problems by providing a rotating shaft structure for a starry sky lamp and the starry sky lamp thereof.

[0006] (II) Technical Solution

[0007] This application provides a rotating shaft structure for a starry sky lamp, comprising: a rotating shaft body and an elastic compensation pad; wherein,

[0008] The rotating shaft body includes a rotating shaft; the rotating shaft includes a first end and a second end disposed opposite to each other, and a limiting protrusion is provided on the second end of the rotating shaft;

[0009] The housing of the lamp body has a shaft hole for the rotating shaft to pass through. The first end of the rotating shaft passes through the shaft hole from the inside of the housing and is fixedly connected to the support arm. The diameter of the shaft hole is smaller than the diameter of the limiting protrusion ring.

[0010] The elastic compensation shim is tightly fitted between the limiting protrusion and the inner side of the housing under the action of axial force, so as to allow the elastic compensation shim to generate axial elastic force and realize the elastic damping connection between the limiting protrusion, the housing and the support arm.

[0011] Preferably, the inner side of the housing is provided with an annular gasket groove that matches the elastic compensation gasket and surrounds the shaft hole.

[0012] Preferably, the elastic compensation pad is a wave spring pad, and the side of the wave spring pad near the limiting protrusion ring is provided with damping teeth.

[0013] Preferably, the elastic compensation pad includes a wave spring pad and a damping ring arranged sequentially along the axial direction, wherein the diameter of the wave spring pad is smaller than the diameter of the damping ring; the wave spring pad is disposed on the side of the damping ring away from the limiting protrusion ring, and is coaxially arranged with the damping ring to form a stepped shape; the side of the damping ring near the limiting protrusion ring is provided with damping teeth.

[0014] Preferably, the annular gasket groove on the inner side of the lamp housing is a stepped annular positioning groove; the stepped annular positioning groove is formed by two annular positioning grooves of different sizes connected sequentially along the axial direction, specifically including a first stepped positioning groove and a second stepped positioning groove, wherein the shape and size of the first stepped positioning groove are adapted to the wave spring ring and are used to position and limit the wave spring ring; the shape and size of the second stepped positioning groove are matched to the damping ring and are used to position and limit the damping ring.

[0015] Preferably, the support arm includes a cover and a support arm body. The support arm body includes a first side and a second side disposed opposite to each other. The rotating shaft is mounted on the first side, and the cover is placed on the second side of the support arm body. The support arm body is provided with a mounting portion for mounting the rotating shaft. The mounting portion includes an annular protrusion extending from the surface of the first side of the support arm body. The annular protrusion surrounds and forms an annular limiting groove that mates with the first end of the rotating shaft. An annular groove matching the outer surface of the annular protrusion is formed on the outer side of the housing, and the shaft hole is formed at the center of the annular groove.

[0016] Preferably, a first screw hole is provided on the first end of the rotating shaft, and a second screw hole is provided on the bottom surface of the annular limiting groove, penetrating from the first side to the second side of the support arm body. The first screw hole and the second screw hole are matched to fix the rotating shaft to the support arm by screws.

[0017] Preferably, the limiting protrusion ring is divided into an inner ring within the circle formed by the first radius and an outer ring outside the circle, with the intersection of the axis of rotation and the plane where the limiting protrusion ring is located as the center. The inner ring has damping teeth on the side near the elastic compensation pad. The outer ring has a fan-shaped notch. A first limiting pin is protruding on the inner side of the lamp body housing. The position of the first limiting pin cooperates with the fan-shaped notch to circumferentially limit the rotation range of the housing. The first limiting pin is parallel to the axis of rotation and passes through the fan-shaped notch. When the lamp body rotates circumferentially, the first limiting pin is restricted by both ends of the fan-shaped notch to limit the rotation angle of the lamp body.

[0018] Preferably, the central angle of the fan ring notch is 90 degrees.

[0019] This application also provides a starry sky light, including a light body, two support arms, and a rotating shaft structure for a starry sky light as described in any of the above.

[0020] (III) Beneficial Effects

[0021] This application provides a rotating shaft structure and a starry sky light, including: a rotating shaft body and an elastic compensation washer; wherein, under the action of axial force, the elastic compensation washer is tightly fitted between the limiting protrusion and the inner surface of the housing, allowing the elastic compensation washer to generate axial elastic force, realizing an elastic damping connection between the limiting protrusion, the housing, and the support arm. The axial elastic force of the washer absorbs the vibration caused by the axial force, transforming the rigid connection into an elastic damping connection, significantly reducing noise. Furthermore, the elastic compensation washer can compensate for assembly errors, adaptively adjusting the rotating shaft position through deformation, reducing reliance on precision machining and improving production yield. In long-term use, the washer can continuously compensate for the increase in clearance caused by material wear, maintaining rotational stability. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the rotating shaft structure of a starry sky lamp provided in this embodiment;

[0023] Figure 2 An exploded view of the rotating shaft structure of the starry sky lamp provided in this embodiment;

[0024] Figure 3 This is a cross-sectional schematic diagram of the rotating shaft structure of the starry sky lamp provided in this embodiment;

[0025] Figure 4 This is an exploded view of the rotating shaft structure of the starry sky lamp provided in this embodiment from another perspective;

[0026] Figure 5This is another exploded view of the rotating shaft structure of the starry sky lamp provided in this embodiment;

[0027] Figure 6 A three-dimensional schematic diagram of the rotating body of the rotating shaft structure of the starry sky lamp provided in this embodiment;

[0028] Figure 7 A three-dimensional schematic diagram of the elastic compensation pad for the rotating shaft structure of the starry sky lamp provided in this embodiment;

[0029] Figure 8 This is a schematic diagram of the housing structure of the lamp body for the rotating shaft structure of the starry sky lamp provided in this embodiment;

[0030] Figure 9 for Figure 8 A magnified view of a portion of the image.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1: Rotating shaft body; 101: First end; 102: Second end; 110: Rotating shaft; 111: First screw hole; 120: Limiting protrusion ring; 121: Inner ring; 122: Outer ring; 123: Fan ring notch; 130: Second limiting pin; 2: Elastic compensation washer; 210: Wave spring washer; 220: Damping ring; 230: Damping tooth; 3: Housing; 300: Lamp body; 310: Shaft hole; 320: 321: Annular gasket groove; 322: Stepped annular positioning groove; 323: First stepped positioning groove; 324: Second stepped positioning groove; 330: First limiting pin; 340: Annular groove; 4: Support arm; 410: Cover; 420: Support arm body; 421: First side; 422: Second side; 430: Mounting part; 431: Annular limiting groove; 432: Second screw hole; 433: Annular protrusion; 5: Screw; Detailed Implementation

[0033] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] like Figure 1 and Figure 2 This application also provides a starry sky lamp, including a lamp body 300, a support arm 4, and a rotating shaft structure for the starry sky lamp as described in this embodiment.

[0038] Specifically, in this embodiment, a design using two support arms 4 for left and right support and rotation is adopted. It is understood that in other embodiments, a single-arm support method can also be used to configure the rotating shaft structure.

[0039] The lamp body 300 and the bracket arm 4 are made of ABS material and are injection molded.

[0040] like Figures 1-6 As shown, this embodiment provides a rotating shaft structure for a starry sky lamp, which includes: a rotating shaft body 1 and an elastic compensation pad 2.

[0041] The rotating shaft body 1 includes a rotating shaft 110; the rotating shaft 110 includes a first end 101 and a second end 102 disposed opposite to each other, and a limiting protrusion ring 120 is provided on the second end 102 of the rotating shaft 110. The limiting protrusion ring 120 is a protruding annular shoulder on the rotating shaft, the center of its concentric circles coinciding with the shaft center, and its radius protruding beyond the radius of the rotating shaft 110; in other embodiments, the limiting protrusion ring 120 is detachable, for example, a limiting washer. The rotating shaft 110 can be selected according to actual conditions. In this embodiment, the rotating shaft 110 is a hollow rotating shaft, which effectively reduces the weight of the rotating shaft itself while ensuring the support rotation function.

[0042] The housing 3 of the lamp body 300 has a shaft hole 310 for the rotating shaft 110 to pass through. The first end 101 of the rotating shaft 110 passes through the shaft hole 310 from the inside of the housing 3 and is fixedly connected to the support arm 4. The diameter of the shaft hole 310 is smaller than the diameter of the limiting protrusion ring 120. In this embodiment, the shaft hole 310 is formed on the lower housing. In other embodiments, the shaft hole 310 can be formed by a combination of two semi-circular holes formed on the upper and lower housings.

[0043] Specifically, the radius of the rotating shaft 110 should be smaller than the radius of the shaft hole 310, and the difference between the two radii should be controlled between 0.005mm and 0.015mm to prevent radial runout during rotation and to control the noise level.

[0044] The elastic compensation shim 2 is tightly fitted between the limiting protrusion 120 and the inner surface of the housing 3 under axial force, allowing the elastic compensation shim 2 to generate axial elastic force and realize the elastic damping connection between the limiting protrusion 120, the housing 3, and the support arm 4. When the lamp body 300 is rotated, the axial elastic force of the elastic compensation shim 2 absorbs the vibration caused by the axial force, significantly reducing noise. Furthermore, the elastic compensation shim 2 can compensate for assembly errors and adaptively adjust the position of the rotating shaft through deformation, reducing reliance on precision machining and improving production yield.

[0045] Preferably, the inner surface of the housing 3 is provided with an annular gasket groove 320 that matches the elastic compensation gasket 2 and surrounds the shaft hole 310. The annular gasket groove 320 physically limits and fixes the position of the elastic compensation gasket 2, reducing the risk of the elastic compensation gasket 2 shifting under rotation or vibration conditions. The bottom surface of the annular gasket groove 320 fits against the elastic compensation gasket 2, diverting axial force from the relatively large contact area, resulting in a low stress concentration factor. Moreover, production operators do not need to visually align the gasket; they only need to press the gasket into the groove to complete the positioning, shortening the assembly time and making it suitable for automated production lines.

[0046] Alternatively, in other embodiments, the axial preload can be adjusted by replacing the elastic compensation shim 2 to adapt to different load requirements.

[0047] Optionally, the elastic compensation pad 2 is a wave spring pad 210. The wave spring pad 210 achieves axial dimension compression through a wavy cross section. Under the same elastic force requirement, its axial space occupancy is reduced compared with the traditional flat pad. In other embodiments, the elastic compensation pad 2 can be selected and set according to the actual situation, such as a disc spring pad or a metal-rubber composite pad.

[0048] Specifically, the wave spring washer 210 has damping teeth 230 on the side near the limiting protrusion ring 120, which increases the coefficient of friction, increases the damping torque, and improves the rotational damping feel.

[0049] like Figure 7 As shown, preferably, the elastic compensation pad 2 includes a wave spring pad 210 and a damping ring 220 arranged sequentially along the axial direction. The diameter of the wave spring pad 210 is smaller than the diameter of the damping ring 220. The wave spring pad 210 is disposed on the side of the damping ring 220 away from the limiting protrusion 120, and is coaxially arranged with the damping ring 220 to form a stepped shape. The side of the damping ring 220 close to the limiting protrusion 120 is provided with damping teeth 230.

[0050] Optionally, the wave spring washer 210 is made of spring steel, and the damping ring 220 is made of rubber or polyurethane.

[0051] like Figure 8 and Figure 9 As shown, in a preferred embodiment of this utility model, the annular gasket groove 320 on the inner side of the housing 3 of the lamp body 300 is a stepped annular positioning groove 321; the stepped annular positioning groove 321 is composed of two annular positioning grooves of different sizes connected sequentially along the axial direction, specifically including a first stepped positioning groove 322 and a second stepped positioning groove 323, wherein the shape and size of the first stepped positioning groove 322 are adapted to the wave spring gasket 210, and are used to position and limit the wave spring gasket 210; the shape and size of the second stepped positioning groove 323 are matched with the damping ring 220, and are used to position and limit the damping ring 220.

[0052] Specifically, the centers of the first stepped positioning groove 322 and the second stepped positioning groove 323 are axially aligned. The depth of the first stepped positioning groove 322 is greater than that of the second stepped positioning groove 323, and the outer diameter of the first stepped positioning groove 322 is smaller than that of the second stepped positioning groove 323. The first stepped positioning groove 322 (deep groove) provides axial locking and radial wrapping for the wave spring washer 210 through the difference in axial depth and radial dimension, thereby limiting the radial displacement of the wave spring washer 210. The second stepped positioning groove 323 (shallow groove) provides circumferential limiting for the damping ring 220, thereby limiting the radial displacement of the damping ring 220. Through fixed connection with the wave spring washer 210, the axial elastic force generated by the wave spring washer 210 ensures continuous engagement between the damping tooth 230 and the limiting protrusion ring 120.

[0053] like Figure 5As shown, further, the support arm 4 includes a cover 410 and a support arm body 420. The support arm body 420 includes a first side 421 and a second side 422 disposed opposite to each other. The rotating shaft 110 is mounted on the first side 421, and the cover 410 covers the second side 422 of the support arm body 420. The support arm body 420 is provided with a mounting portion 430 for mounting the rotating shaft 110. The mounting portion 430 includes an annular protrusion 433 protruding from the surface of the first side 421 of the support arm body 420. An annular protrusion 433 surrounds and forms an annular limiting groove 431 that mates with the first end 101 of the rotating shaft 110; an annular groove 340 matching the outer surface of the annular protrusion 433 is provided on the outer side of the housing 3; the bottom surface of the annular groove 340 is provided with an annular rotation trajectory surface matching the annular protrusion 433 to ensure that the housing 3 can rotate smoothly; the groove edge of the annular groove 340 fits against the support arm 4 to achieve a natural transition between the support arm 4 and the housing 3, which is more aesthetically pleasing; the shaft hole 310 is opened at the center of the annular groove 340.

[0054] like Figure 6 As shown, preferably, a first screw hole 111 is provided on the first end 101 of the rotating shaft 110, and a second screw hole 432 is provided on the bottom surface of the annular limiting groove 431, which penetrates from the first side 421 to the second side 422 of the support arm body 420. The first screw hole 111 and the second screw hole 432 are matched so that the rotating shaft 110 and the support arm 4 can be fixed by screws 5.

[0055] Specifically, the number of the first screw hole 111 and the corresponding second screw hole 432 can be set according to the actual situation, such as one, two or more. Specifically, in this embodiment, the number of the first screw hole 111 and the corresponding second screw hole 432 is two. The rotating shaft 110 is fixed to the support arm 4 by two screws 5. The positions of the two first screw holes 111 are circumferentially distributed at the first end 101.

[0056] Optionally, the first end 101 of the rotating shaft 110 is provided with a second limiting pin 130, which passes through a through hole corresponding to the bottom surface of the annular limiting groove 431 to achieve circumferential limiting of the rotating shaft body 1 and the mounting part 430 of the support arm 4.

[0057] Preferably, the limiting protrusion ring 120 is divided into an inner ring 121 located within the circle formed by the first radius and an outer ring 122 located outside the circle, with the intersection of the axis of the rotating shaft 110 and the plane where the limiting protrusion ring 120 is located as the center. The inner ring 121 is provided with damping teeth 230 on the side near the elastic compensation pad 2. The damping teeth 230 are correspondingly arranged with the damping teeth 230 on the damping ring 220 to achieve a better damping effect. The outer ring 122 has a fan-shaped notch 123. The fan-shaped notch 123 is an arc-shaped hollow shape with the axis of the rotating shaft structure as the center. Its outline is formed by two concentric arc edges and a straight edge connecting the two arc edges, forming a closed and regular fan-shaped opening area.

[0058] Specifically, a first limiting pin 330 is provided on the inner side of the housing 3 of the lamp body 300. The position of the first limiting pin 330 is matched with the fan ring notch to circumferentially limit the rotation range of the housing 3. The first limiting pin 330 is parallel to the axis of rotation and passes through the fan ring notch 123. When the lamp body 300 rotates circumferentially, the first limiting pin 330 is restricted by both ends of the fan ring notch to limit the rotation angle of the lamp body 300.

[0059] Optionally, the degree of the central angle of the fan ring notch 123 can be set according to the actual situation, such as 60 degrees, 90 degrees, or 120 degrees. In this specific embodiment, the degree of the central angle of the fan ring notch 123 is 90 degrees, so as to limit the rotation angle of the lamp body 300 to within 90 degrees.

[0060] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. In addition to the above embodiments, this utility model may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A rotating shaft structure for a starry sky lamp, characterized in that, include: The rotating shaft body and the elastic compensation shims; among them, The rotating shaft body includes a rotating shaft; the rotating shaft includes a first end and a second end disposed opposite to each other, and a limiting protrusion is provided on the second end of the rotating shaft; The housing of the lamp body has a shaft hole for the rotating shaft to pass through. The first end of the rotating shaft passes through the shaft hole from the inside of the housing and is fixedly connected to the support arm. The diameter of the shaft hole is smaller than the diameter of the limiting protrusion ring. The elastic compensation shim is tightly fitted between the limiting protrusion and the inner side of the housing under the action of axial force, so as to allow the elastic compensation shim to generate axial elastic force and realize the elastic damping connection between the limiting protrusion, the housing and the support arm.

2. The rotating shaft structure for a starry sky lamp according to claim 1, characterized in that, The inner side of the housing is provided with an annular gasket groove that matches the elastic compensation gasket and surrounds the shaft hole.

3. The rotating shaft structure for a starry sky lamp according to claim 2, characterized in that, The elastic compensation pad is a wave spring pad, and the side of the wave spring pad near the limiting protrusion ring is provided with damping teeth.

4. The rotating shaft structure for a starry sky lamp according to claim 2, characterized in that, The elastic compensation pad includes a wave spring pad and a damping ring arranged sequentially along the axial direction. The diameter of the wave spring pad is smaller than the diameter of the damping ring. The wave spring pad is disposed on the side of the damping ring away from the limiting protrusion ring and is coaxially arranged with the damping ring to form a stepped shape. The side of the damping ring near the limiting protrusion ring is provided with damping teeth.

5. The rotating shaft structure for a starry sky lamp according to claim 4, characterized in that, The annular gasket groove on the inner side of the lamp housing is a stepped annular positioning groove; the stepped annular positioning groove is composed of two annular positioning grooves of different sizes connected sequentially along the axial direction, specifically including a first stepped positioning groove and a second stepped positioning groove, wherein the shape and size of the first stepped positioning groove are adapted to the wave spring ring and are used to position and limit the wave spring ring; the shape and size of the second stepped positioning groove are matched to the damping ring and are used to position and limit the damping ring.

6. The rotating shaft structure for a starry sky lamp according to any one of claims 1-5, characterized in that, The support arm includes a cover and a support arm body. The support arm body includes a first side and a second side disposed opposite to each other. The rotating shaft is mounted on the first side, and the cover is placed on the second side of the support arm body. The support arm body is provided with a mounting part for mounting the rotating shaft. The mounting part includes an annular protrusion extending from the surface of the first side of the support arm body. The annular protrusion surrounds and forms an annular limiting groove that mates with the first end of the rotating shaft. An annular groove matching the outer surface of the annular protrusion is provided on the outer side of the housing. The shaft hole is located at the center of the annular groove.

7. The rotating shaft structure for a starry sky lamp according to claim 6, characterized in that, A first screw hole is provided on the first end of the rotating shaft, and a second screw hole is provided on the bottom surface of the annular limiting groove, penetrating from the first side to the second side of the support arm body. The first screw hole and the second screw hole are matched to fix the rotating shaft to the support arm by screws.

8. The rotating shaft structure for a starry sky lamp according to claim 1, characterized in that, The limiting protrusion ring is divided into an inner ring within the circle formed by the first radius and an outer ring outside the circle, with the intersection of the axis of rotation and the plane containing the limiting protrusion ring as the center. The inner ring has damping teeth on the side near the elastic compensation pad. The outer ring has a fan-shaped notch. A first limiting pin is protruding on the inner side of the lamp body housing. The position of the first limiting pin is matched with the fan-shaped notch to circumferentially limit the rotation range of the housing. The first limiting pin is parallel to the axis of rotation and passes through the fan-shaped notch. When the lamp body rotates circumferentially, the first limiting pin is restricted by both ends of the fan-shaped notch to limit the rotation angle of the lamp body.

9. The rotating shaft structure for a starry sky lamp according to claim 8, characterized in that, The central angle of the notch in the fan ring is 90 degrees.

10. A starry sky lamp, characterized in that, It includes a lamp body, two support arms, and a rotating shaft structure for a starlight lamp as described in any one of claims 1-9.

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