A packaging box telescopic limiting device with a central motor

Abstract

This utility model relates to the field of packaging box telescopic limiting, and discloses a packaging box telescopic limiting device with a central motor. It includes a lotus-shaped plate, with a top cover fixedly installed at the center of the upper surface of the lotus-shaped plate. A box body top cover is rotatably connected to the lower surface of the lotus-shaped plate. The lower surface of the box body top cover contacts a food unfolding box. An unfolding assembly is provided at the center of the food unfolding box. The unfolding assembly includes a box body bottom cover. Multiple sets of evenly distributed slide rails are formed on the upper surface of the box body bottom cover. Multiple sets of axial compensation plates are rotatably connected to the left and right ends of the upper surface of the box body bottom cover near the slide rails. In this utility model, through the mutual cooperation of the toothed plate, drive housing, food unfolding box, and other components in the device, the radial telescopic angle of the food unfolding box is controllable, with zero retraction and zero jamming, improving display stability and service life.

Description

Technical Field

[0001] This utility model relates to the field of packaging box telescopic limiting, and in particular to a packaging box telescopic limiting device with a central motor. Background Technology

[0002] In modern logistics and packaging, packaging boxes serve as crucial carriers for product protection and transportation, and their structural design directly impacts product safety, transportation efficiency, and user experience. To accommodate products of different sizes and shapes, and to meet space optimization needs during transportation, extendable packaging boxes have emerged. These boxes typically achieve volume adjustment through a relatively sliding box structure, while the telescopic limiting device is a key component ensuring stable and reliable operation of its telescopic function. As the consumer market increasingly demands both display appeal and portability for food gift boxes, traditional top-and-bottom lid or drawer-style packaging boxes can no longer meet the high-experience requirements of "one-click opening, simultaneous limiting, and anti-rebound when retracted."

[0003] The aforementioned devices have the following drawbacks: most designs place the motor or torsion spring at the edge of the box, resulting in a long transmission path, large torque loss, asynchronous unfolding, easy shaking of the box, lack of elastic adjustment mechanism between the sliding rail and the box wall, increased wear after repeated opening and closing, and jamming or noise. Existing equipment has low functional integration, and auxiliary functions such as prompt sound, waterproofing, and dustproofing require additional modules, occupying a large space and hindering the design of lightweight and thin boxes. Therefore, a packaging box telescopic limit device with a central motor is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a packaging box telescopic limiting device with a central motor, which aims to improve the problems in the prior art such as asynchronous unfolding due to dispersed drive, weak limiting that is easy to retract, and inability to compensate for axial clearance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a packaging box telescopic limiting device with a central motor, comprising a lotus-shaped plate, a top cover fixedly installed at the axial center of the upper surface of the lotus-shaped plate, a box body top cover plate rotatably connected to the lower surface of the lotus-shaped plate, a food unfolding box contacting the lower surface of the box body top cover plate, an unfolding assembly provided at the axial center of the food unfolding box, the unfolding assembly including a box body bottom cover plate, multiple sets of evenly distributed slide rails opened on the upper surface of the box body bottom cover plate, multiple sets of axial compensation plates rotatably connected to the left and right ends of the upper surface of the box body bottom cover plate near the slide rails, a drive shaft fixedly installed at the axial center of the box body bottom cover plate by a bushing, a toothed plate fixedly installed in a groove on the upper surface of the box body bottom cover plate, and a drive housing detachably connected to the groove on the upper surface of the toothed plate.

[0006] As a further description of the above technical solution: the unfolding assembly also includes a disc, the drive shaft is fixedly installed at the center of the disc via a reduction gear, a chassis is fixedly installed at the bottom end of the drive shaft, a sound transmission channel is opened on the lower surface of the chassis, and a speaker is fixedly installed in the groove on the upper surface of the sound transmission channel.

[0007] As a further description of the above technical solution: the bushing is fixedly installed on the outer wall of the drive shaft.

[0008] As a further description of the above technical solution: the reduction gear is fixedly installed on the bottom end of the outer wall of the drive shaft.

[0009] As a further description of the above technical solution: the left end of the food unfolding box is slidably connected to the groove of the disc via an arc-shaped sliding rail.

[0010] As a further description of the above technical solution: the top corner of the outer surface of the lotus-shaped plate is set as a rounded corner structure.

[0011] As a further description of the above technical solution: the bottom cover of the box is rotatably connected to the upper surface of the chassis via a disc.

[0012] As a further description of the above technical solution: the disc is engaged in the groove on the lower surface of the bottom cover plate of the box.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by utilizing the inter-connection relationship between components such as the toothed plate, drive shell, and food unfolding box in the equipment, the radial extension angle of the food unfolding box can be controlled, with zero retraction and zero jamming, thereby improving display stability and service life.

[0015] 2. In this utility model, by utilizing the inter-connection relationship between components such as reduction gears, discs, and chassis in the equipment, the motor, transmission, and speaker are modularly concealed, reducing the overall thickness of the machine. At the same time, it features reverse self-locking and positioning sound prompts, ensuring safe handling, user-friendly interaction, and convenient maintenance. Attached Figure Description

[0016] Figure 1 This is a front view of the main body of a packaging box telescopic limiting device with a central motor proposed in this utility model;

[0017] Figure 2 An exploded view of a portion of the upper cover plate of a packaging box with a central motor-driven telescopic limiting device proposed in this utility model.

[0018] Figure 3An exploded view of a portion of the bottom cover plate of a packaging box with a central motor and telescopic limiting device proposed in this utility model.

[0019] Figure 4 This is a partial schematic diagram of a disc-shaped device for telescopic limiting of a packaging box with a central motor, as proposed in this utility model.

[0020] Legend:

[0021] 1. Lotus-shaped panel; 2. Box top cover; 3. Food unfolding box; 4. Top cover; 5. Unfolding assembly; 51. Box bottom cover; 52. Slide rail; 53. Axial compensation plate; 54. Bushing; 55. Drive shaft; 56. Gear plate; 57. Drive housing; 58. Disc; 581. Arc-shaped slide rail; 59. Chassis; 591. Sound channel; 592. Sound output device; 593. Reduction gear. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 - Figure 3This utility model provides an embodiment of a packaging box telescopic limiting device with a central motor, including a lotus-shaped plate 1. The lotus-shaped plate 1 serves as the top plate and structural reference plate of the entire device. Its outer surface top corners are rounded to reduce bumps and enhance visual appeal. It also provides a fixed mounting reference for the top cover 4 and forms a rotating pair with the box body top cover 2 at the bottom, enabling overall rotational opening and closing. The outer surface top corners of the lotus-shaped plate 1 are rounded. The top cover 4 is fixedly installed at the axis of the upper surface of the lotus-shaped plate 1. The top cover 4 is fixedly installed with the axis of the lotus-shaped plate 1 as a reference, forming a closed protective cover at the top of the device, preventing dust and moisture from entering the interior. It also provides a force point for hand-holding or lifting during handling. The lower surface of the lotus-shaped plate 1 is rotatably connected to the box body top cover 2, which is a thin plate-shaped transition piece. The upper surface of the box body top cover 2 is connected to the lotus-shaped plate 1. The lotus-shaped panel 1 is rotatably connected, with its lower surface in surface contact with the upper surface of the food display box 3. This facilitates the smooth transmission of the rotational motion of the lotus-shaped panel 1 to the food display box 3, and also limits and prevents dust from entering the top of the food display box 3. The lower surface of the box cover 2 contacts the food display box 3, which is used to hold and display food. Its left end forms a sliding pair with the disc 58 via an arc-shaped sliding rail 581, allowing it to expand outward or contract inward synchronously along the radial direction under the drive of the unfolding component 5, thus achieving the "telescopic limit" function. The unfolding component 5 is located at the axis of the food display box 3. The unfolding component 5 integrates multi-stage transmission, sliding, limit, and sound feedback functions with the movement of the entire device as its core. The rotational motion of the central motor, which is hidden inside the chassis 59, is converted into the radial unfolding or contracting action of the food display box 3 via the drive shaft 55, and also has additional functions such as support, positioning, and sound prompts.

[0024] Reference Figure 2 - Figure 4The unfolding assembly 5 includes a box bottom cover plate 51, which serves as the main load-bearing base plate of the unfolding assembly 5. A slide rail 52 is formed on its upper surface to guide the radial sliding of the axial compensation plate 53 and the food unfolding box 3. Simultaneously, a rotating pair is formed between the box bottom cover plate 51 and the base plate 59 via a disc 58, achieving overall rotational support. The box bottom cover plate 51 is rotatably connected to the upper surface of the base plate 59 via the disc 58. Multiple sets of evenly distributed slide rails 52 are formed on the upper surface of the box bottom cover plate 51, with the slide rails 52 radiating outwards from the upper surface of the box bottom cover plate 51. Multiple sets of linear guide rails, evenly distributed in a circular pattern, are used to limit and guide the radial sliding path of the axial compensation plate 53 and the food unfolding box 3, ensuring the synchronization and motion accuracy of the unfolding. Multiple sets of axial compensation plates 53 are rotatably connected to the upper surface of the box bottom cover plate 51 near the left and right ends of the slide rail 52. The axial compensation plates 53 are multiple sets of thin-plate-shaped sliders, rotatably connected to the upper surface of the box bottom cover plate 51 and located at the left and right ends of the slide rail 52. They provide axial clearance compensation when the food unfolding box 3 moves radially, preventing jamming, and also serve as lateral limiting and... To enhance rigidity, a drive shaft 55 is fixedly mounted at the axis of the bottom cover plate 51 via a bushing 54. The drive shaft 55 transmits the high-speed, low-torque power output from the central motor to the entire unfolding assembly 5 via a reduction gear 593, achieving smooth rotation. The bushing 54 is fixedly mounted on the outer wall of the drive shaft 55, reliably transmitting the torque of the drive shaft 55 to the bottom cover plate 51, while also acting as a bearing to reduce rotational friction. A groove is fixedly installed on the upper surface of the bottom cover plate 51. The toothed plate 56 is embedded in the groove on the upper surface of the bottom cover plate 51 of the box body. Its surface is machined with a toothed structure, which can mesh with the gear system inside the drive housing 57 to achieve precise angle positioning and self-locking, preventing the food unfolding box 3 from accidentally retracting. The drive housing 57 is detachably connected to the groove on the upper surface of the toothed plate 56. After the drive housing 57 meshes with the toothed plate 56, the rotational movement of the drive shaft 55 is further subdivided into multiple equal angles to ensure the consistency of the unfolding angle of the food unfolding box 3 each time, which is convenient for maintenance and quick disassembly and assembly.

[0025] Reference Figure 2 - Figure 4The unfolding assembly 5 also includes a disc 58, which is snapped into a groove on the lower surface of the bottom cover plate 51 of the box body. The groove on the upper surface of the disc 58 cooperates with the arc-shaped sliding rail 581 on the left end of the food unfolding box 3 to form an arc guide. At the same time, it is fixed to the groove on the lower surface of the bottom cover plate 51 of the box body through a snap-fit ​​structure, realizing the rotational support and axial positioning between the bottom cover plate 51 of the box body and the chassis 59. The left end of the food unfolding box 3 is slidably connected to the groove of the disc 58 through the arc-shaped sliding rail 581. The arc-shaped sliding rail 581 is used to convert the rotational motion of the disc 58 into the radial linear motion of the food unfolding box 3, and at the same time provides lateral support to prevent the box body from shaking. The drive shaft 55 is fixedly installed at the axis of the disc 58 through a reduction gear 593. The reduction gear 593 is fixedly installed on the bottom end of the outer wall of the drive shaft 55. The reduction gear 593 is used to convert the high-speed, low-torque output of the central motor into low-speed, high-torque power. This ensures that the food unfolding box 3 receives sufficient thrust and operates smoothly; it also has a reverse self-locking function to prevent the load from reversing. The bottom end of the drive shaft 55 is fixedly installed with a chassis 59, which serves as the bottom shell and motor compartment of the entire device. The central motor, reducer, and control circuit are hidden inside. Its upper surface is rotatably connected to the disc 58, providing stable support for the entire machine. A sound transmission channel 591 is opened on the lower surface of the chassis 59 for sound propagation. The sound transmission channel 591 is used to evenly diffuse the prompt sound or music emitted by the speaker 592 to the outside, while also providing dust and water protection. The speaker 592 is fixedly installed in the groove on the upper surface of the sound transmission channel 591. The speaker 592 is a miniature speaker or buzzer fixed in the groove on the upper surface of the sound transmission channel 591. Driven by the control circuit, it emits a prompt sound when the packaging box is unfolded or closed, enhancing the user interaction experience.

[0026] Working principle:

[0027] The entire machine is based on a chassis 59, which integrates a central motor, control circuit, and reduction gear 593. When the central motor is powered on, its output shaft is reduced in speed and torque by the reduction gear 593, converting high-speed, low-torque power into low-speed, high-torque power. This power is directly transmitted to the drive shaft 55, which becomes the sole rotation center of the device. A bushing 54 is fitted on the outer wall of the drive shaft 55, and the bushing 54 is interference-fitted with the central hole of the bottom cover plate 51 of the box, so that the bottom cover plate 51 of the box rotates synchronously with the drive shaft 55. Multiple sets of slide rails 52 are evenly arranged radially on the upper surface of the bottom cover plate 51. Each set of slide rails 52 is rotatably connected to an axial compensation plate 53 at both ends. The axial compensation plate 53 is a thin-plate slider. When the food unfolding box 3 slides radially, the axial compensation plate 53 can adaptively compensate for the axial clearance, prevent jamming, and provide lateral limiting and rigidity enhancement for the food unfolding box 3.

[0028] The top surface of the food unfolding box 3 maintains surface contact with the top cover plate 2 of the box body. The top cover plate 2 of the box body is rotatably connected to the lotus-shaped plate 1. The lotus-shaped plate 1 serves as the top plate and structural benchmark for the entire machine's appearance. Its outer surface top corners adopt a rounded corner structure to reduce bumps and enhance visual aesthetics. The top cover 4 is fixedly installed at the axis of the upper surface of the lotus-shaped plate 1. The top cover 4 forms the closed protective cover at the top of the device to prevent dust and moisture from entering, and provides a point of force for holding or lifting during transportation. When the drive shaft 55 drives the bottom cover plate 51 of the box body to rotate, the toothed plate 56 fixed in the groove on the upper surface of the bottom cover plate 51 of the box body meshes with the gear system inside the drive housing 57. The drive housing 57 is a detachable cover. Its internal gear system subdivides the continuous rotation of the drive shaft 55 into multiple equal angles to achieve precise angle positioning and self-locking, preventing the food unfolding box 3 from accidentally retracting.

[0029] A disc 58 is engaged in a groove on the lower surface of the bottom cover plate 51 of the box body. The disc 58 and the chassis 59 form a rotating pair, which provides axial and radial support for the entire machine. An arc-shaped sliding rail 581 is provided at the left end of the food unfolding box 3. The arc-shaped sliding rail 581 is embedded in the groove on the upper surface of the disc 58, forming an arc-linear composite guide mechanism. When the disc 58 rotates with the bottom cover plate 51 of the box body, the arc-shaped sliding rail 581 converts the rotational motion into radial linear motion of the food unfolding box 3 along the sliding rail 52, realizing the telescopic limit function of "synchronous outward expansion and inward contraction". At the moment of start or end of the telescopic action, the control circuit triggers the speaker 592 in the sound channel 591 on the lower surface of the chassis 59 to emit a prompt sound or music. The sound is evenly diffused to the outside through the sound channel 591, improving the user interaction experience. The sound channel 591 also has dustproof and waterproof functions.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A packaging box telescopic limiting device with a central motor, comprising a lotus-shaped plate (1), characterized in that: A top cover (4) is fixedly installed at the center of the upper surface of the lotus-shaped plate (1), and a box cover plate (2) is rotatably connected to the lower surface of the lotus-shaped plate (1). The lower surface of the box cover plate (2) contacts the food unfolding box (3), and an unfolding component (5) is provided at the center of the food unfolding box (3). The unfolding assembly (5) includes a box bottom cover plate (51). Multiple sets of evenly distributed slide rails (52) are provided on the upper surface of the box bottom cover plate (51). Multiple sets of axial compensation plates (53) are rotatably connected to the left and right ends of the upper surface of the box bottom cover plate (51) near the slide rails (52). A drive shaft (55) is fixedly installed at the axis of the box bottom cover plate (51) through a bushing (54). A toothed plate (56) is fixedly installed in the groove on the upper surface of the box bottom cover plate (51). A drive housing (57) is detachably connected to the groove on the upper surface of the toothed plate (56).

2. The packaging box telescopic limiting device with a central motor according to claim 1, characterized in that: The unfolding assembly (5) also includes a disc (58). The drive shaft (55) is fixedly installed at the center of the disc (58) via a reduction gear (593). A chassis (59) is fixedly installed at the bottom end of the drive shaft (55). A sound transmission channel (591) is opened on the lower surface of the chassis (59). A sound transmitter (592) is fixedly installed in the groove on the upper surface of the sound transmission channel (591).

3. The packaging box telescopic limiting device with a central motor according to claim 1, characterized in that: The bushing (54) is fixedly installed on the outer wall of the drive shaft (55).

4. The packaging box telescopic limiting device with a central motor according to claim 2, characterized in that: The reduction gear (593) is fixedly installed on the bottom end of the outer wall of the drive shaft (55).

5. The packaging box telescopic limiting device with a central motor according to claim 1, characterized in that: The left end of the food unfolding box (3) is slidably connected to the groove of the disc (58) via an arc-shaped sliding rail (581).

6. The packaging box telescopic limiting device with a central motor according to claim 1, characterized in that: The outer surface of the lotus-shaped panel (1) is designed with rounded corners at the top corners.

7. The packaging box telescopic limiting device with a central motor according to claim 1, characterized in that: The bottom cover plate (51) of the box is rotatably connected to the upper surface of the chassis (59) via a disc (58).

8. A packaging box telescopic limiting device with a central motor according to claim 2, characterized in that: The disc (58) is engaged in the groove on the lower surface of the bottom cover plate (51) of the box.

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