Intermittent transmission mechanism

Abstract

The utility model discloses an intermittent drive mechanism, including casing, driving shaft and driven shaft, one end rotation installation driving shaft of casing, the other end rotation installation driven shaft and transmission shaft, and install first gear on the driven shaft, install second gear on transmission shaft, and first gear and second gear interlock, install the limit disc on the casing, set up the limit hole on the limit disc, be equipped with the limit block in the limit hole, the inner end of driving shaft passes through the limit hole and is connected with transmission shaft through the notch wheel mechanism, be equipped with the lug on driving shaft, and the lug and limit hole slide fit. The utility model can effectively realize the different unfolding angle of two screens of folding screen equipment, only needs a group of driving motor to realize the function, and effectively reduces the energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of transmission mechanism technology, and in particular relates to an intermittent transmission mechanism. Background Technology

[0002] With the rapid development of flexible display technology, foldable screen electronic devices are gradually becoming the mainstream form in the consumer electronics field due to their dual advantages of portability and large-screen experience. However, the hinge design of existing foldable screen devices still has significant limitations: most products only support a single overall opening angle (such as the common 180° fully unfolded), which makes it difficult to meet the differentiated usage needs in multiple scenarios.

[0003] Although foldable devices with dual-screen linkage designs have appeared on the market, their core problem is that the two screens must maintain the exact same motion trajectory and angle limit, and cannot dynamically allocate different maximum opening angles according to actual application needs. This rigidly coupled motion mode not only reduces the freedom of user experience, but may also lead to the following technical bottlenecks: (1) If the maximum angle is forcibly unified, the optimal display effect in a certain scenario must be sacrificed; (2) Although the angle control can be decoupled by adopting an independent drive scheme, it will increase the number of motors, the complexity of the control system and the energy consumption level, which violates the concept of thin and light design; (3) Traditional mechanical linkage mechanisms lack intelligent clutch mechanisms and cannot automatically switch between synchronous / asynchronous working states within a specific stroke segment.

[0004] To address the aforementioned pain points, the industry urgently needs an innovative mechanical transmission architecture that can both ensure the coordination of the basic movements of the two screens and achieve differentiated angle restrictions through purely physical structures. Utility Model Content

[0005] The purpose of this invention is to provide an intermittent transmission mechanism that can completely solve the shortcomings of the prior art.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An intermittent transmission mechanism includes a housing, a drive shaft, and a driven shaft. The drive shaft is rotatably mounted at one end of the housing, and the driven shaft and a transmission shaft are rotatably mounted at the other end. A first gear is mounted on the driven shaft, and a second gear is mounted on the transmission shaft. The first gear and the second gear mesh with each other. A limiting plate is mounted on the housing, and a limiting hole is formed in the limiting plate. A limiting block is provided in the limiting hole. The inner end of the drive shaft passes through the limiting hole and is connected to the transmission shaft through a Geneva mechanism. A protrusion is provided on the drive shaft, and the protrusion slides in engagement with the limiting hole.

[0008] Furthermore, the ratio of the number of teeth of the first gear to the number of teeth of the second gear is 1:2.

[0009] Furthermore, two limiting blocks are provided in the limiting hole, the included angle between the two limiting blocks is 130°, and the protrusion is located between the two limiting blocks.

[0010] Furthermore, the grooved wheel mechanism includes a grooved wheel, a dial, and a cylindrical pin. The grooved wheel is installed at the end of the drive shaft, the dial is installed at the end of the drive shaft, and a cylindrical pin is provided on the dial. The grooved wheel has four slots evenly distributed along the circumference, and the cylindrical pin matches the slots.

[0011] Preferably, the housing includes a first housing and a second housing. One end of the limiting plate is fitted onto one end of the first housing, and the other end is fitted onto one end of the second housing. The other end of the first housing is fitted with a first end face plate, and the other end of the second housing is fitted with a second end face plate. Both the first end face plate and the second end face plate are connected to the limiting plate by bolts.

[0012] Furthermore, an O-ring is installed on the mating surface of the first housing with the first end face plate and the limiting plate, and an O-ring is installed on the mating surface of the second housing with the second end face plate and the limiting plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The structure is simple and effective, and can effectively realize different unfolding angles of the two screens of the foldable screen device, especially one screen unfolding to 180° and the other screen unfolding to 130°;

[0015] 2. Only one drive motor is needed to achieve the function, effectively reducing energy consumption;

[0016] 3. It adopts a nested shell structure to meet the requirements of ultra-thin body design. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is an exploded structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of this utility model after removing the shell. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the structure of this utility model after removing the shell. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the structure of this utility model after removing the shell, limiting plate, and bolts. Figure 1 ;

[0022] Figure 6This is a schematic diagram of the structure of this utility model after removing the shell, limiting plate, and bolts. Figure 2 .

[0023] In the diagram, 1. Housing; 101. First housing; 102. Second housing; 2. Drive shaft; 3. Transmission shaft; 4. First gear; 5. Second gear; 6. Limiting plate; 7. Limiting hole; 8. Limiting block; 9. Geneva mechanism; 91. Geneva wheel; 92. Dial; 93. Cylindrical pin; 94. Groove; 10. Protrusion; 11. Screen; 12. First end face plate; 13. Second end face plate; 14. Bolt. Detailed Implementation

[0024] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0025] like Figures 1 to 6 As shown, an intermittent transmission mechanism includes a housing 1, a drive shaft 2, and a driven shaft (not shown in the figure). The drive shaft 2 is rotatably mounted on one end of the housing 1, and the driven shaft and transmission shaft 3 are rotatably mounted on the other end. A first gear 4 is mounted on the driven shaft, and a second gear 5 is mounted on the transmission shaft 3. The first gear 4 and the second gear 5 mesh with each other, and the gear ratio of the first gear 4 to the second gear 5 is 1:2. A limiting disk 6 is installed on the housing 1, and a limiting hole 7 is formed on the limiting disk 6. A limiting block 8 is provided in the limiting hole 7. The inner end of the drive shaft 2 passes through the limiting hole 7 and is connected to the transmission shaft 3 through a Geneva mechanism 9. A protrusion 10 is provided on the drive shaft 2, and the protrusion 10 slides in engagement with the limiting hole 7.

[0026] In this embodiment, two limiting blocks 8 are provided in the limiting hole 7, the included angle between the two limiting blocks 8 is 130°, and the protrusion 10 is located between the two limiting blocks 8.

[0027] In this embodiment, the Geneva mechanism 9 includes a Geneva wheel 91, a dial 92, and cylindrical pins 93. The Geneva wheel 91 is mounted on the end of the drive shaft 3, and the dial 92 is mounted on the end of the drive shaft 2. Cylindrical pins 93 are disposed on the dial 92. The Geneva wheel 91 has four slots 94 evenly distributed circumferentially, and the cylindrical pins 93 match the slots 94. When the dial 92 rotates with the drive shaft 2, the cylindrical pins 93 periodically engage with the slots 94 of the Geneva wheel 91.

[0028] The working process of this utility model:

[0029] The drive shaft 2 is connected to one screen 11, and the driven shaft is connected to the other screen. When the drive shaft 2 drives the dial 92 to rotate 90°, the cylindrical pin 93 inserts into a slot 94 of the grooved wheel 91. At this time, the transmission shaft 3 rotates accordingly and drives the driven shaft to rotate 180° at the same angular velocity through the meshing of the second gear 5 and the first gear 4, keeping the two screens in perfect synchronous motion. Then, the cylindrical pin 93 disengages from the slot 94 of the grooved wheel 91, and the drive shaft 2 continues to rotate 40° before stopping under the action of the protrusion 10 and the limiting block 8. This completes the rotation of one screen by 180° and the other screen by 130°.

[0030] As a preferred embodiment, the housing 1 includes a first housing 101 and a second housing 102. One end of the limiting plate 6 is fitted onto one end of the first housing 101, and the other end is fitted onto one end of the second housing 102. A first end face plate 12 is fitted onto the other end of the first housing 101, and a second end face plate 13 is fitted onto the other end of the second housing 102. Both the first end face plate 12 and the second end face plate 13 are connected to the limiting plate 6 by bolts 14. This nested housing structure design meets the requirements of ultra-thin body design.

[0031] As a preferred embodiment, O-rings (not shown in the figure) are installed on the mating surfaces of the first housing 101 with the first end face plate 12 and the limiting plate 6, and O-rings (not shown in the figure) are installed on the mating surfaces of the second housing 102 with the second end face plate 13 and the limiting plate 6. This design enables the overall structure to achieve an IP67 protection rating.

[0032] In this embodiment, all metal friction surfaces are coated with DLC (diamond-like carbon) to reduce the coefficient of friction to below 0.08.

[0033] Table 1 Comparison of Experimental Data

[0034] Peak power consumption 12W 3.5W -71％ Response delay 85ms 12ms 7x speedup Volume occupied Φ60×45mm Φ45×30mm -62％ Mean Time Between Failures 3000 hours 15,000 hours 5 times more reliable

[0035] This invention successfully solves the core problem of multimodal interaction in foldable screen devices, achieving intelligent motion control with a minimalist mechanical architecture.

[0036] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspect lies in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0037] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0038] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0039] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. An intermittent transmission mechanism, characterized in that: The device includes a housing, a drive shaft, and a driven shaft. The drive shaft is rotatably mounted on one end of the housing, and the driven shaft and a transmission shaft are rotatably mounted on the other end. A first gear is mounted on the driven shaft, and a second gear is mounted on the transmission shaft. The first gear and the second gear mesh with each other. A limiting plate is mounted on the housing, and a limiting hole is formed on the limiting plate. A limiting block is provided in the limiting hole. The inner end of the drive shaft passes through the limiting hole and is connected to the transmission shaft through a Geneva mechanism. A protrusion is provided on the drive shaft, and the protrusion slides in engagement with the limiting hole.

2. The intermittent transmission mechanism according to claim 1, characterized in that: The ratio of the number of teeth of the first gear to the number of teeth of the second gear is 1:

2.

3. The intermittent transmission mechanism according to claim 2, characterized in that: Two limiting blocks are provided in the limiting hole, and the included angle between the two limiting blocks is 130°. The protrusion is located between the two limiting blocks.

4. The intermittent transmission mechanism according to claim 3, characterized in that: The grooved wheel mechanism includes a grooved wheel, a dial, and a cylindrical pin. The grooved wheel is installed at the end of the drive shaft, the dial is installed at the end of the drive shaft, and a cylindrical pin is provided on the dial. The grooved wheel has four slots evenly distributed along the circumference, and the cylindrical pin matches the slots.

5. The intermittent transmission mechanism according to any one of claims 1-4, characterized in that: The housing includes a first housing and a second housing. One end of the limiting plate is fitted onto one end of the first housing, and the other end is fitted onto one end of the second housing. The other end of the first housing is fitted with a first end face plate, and the other end of the second housing is fitted with a second end face plate. Both the first end face plate and the second end face plate are connected to the limiting plate by bolts.

6. The intermittent transmission mechanism according to claim 5, characterized in that: An O-ring is installed on the mating surface of the first housing with the first end face plate and the limiting plate, and an O-ring is installed on the mating surface of the second housing with the second end face plate and the limiting plate.

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