Limiting structure

Abstract

The utility model relates to a limiting structure which comprises a driving source, and an output shaft of the driving source is connected with a first shaft body, a transmission structure and a second shaft body. A first limiting block and a third limiting block are arranged on the first shaft body; and a second limiting block and a fourth limiting block are arranged on the second shaft body. A first limiting block, a second limiting block, a third limiting block and a fourth limiting block are arranged; a transmission structure is adopted, a driving source outputs a first shaft body and transmits the first shaft body to a second shaft body through the transmission structure, and a single driving source can be adopted to simultaneously limit and limit an iron ring through a single limiting piece or two limiting pieces, so that a corresponding clutch piece rotates, and correspondingly, a single belt pulley rotates or two belt pulleys rotate simultaneously; finally, the purpose of opening and closing a single-side curtain or simultaneously limiting curtains on two sides is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission structures in electric curtains, in particular to a limiting structure. Background Art

[0002] In the prior art, two tracks at the same level are used to achieve the synchronous opening of a curtain and the independent opening and closing of the curtains on both sides. This solves the technical problem that the opening and closing position of a single curtain is only in the middle, or fixed on one side. However, the overall width of the two tracks at the same level is relatively wide, which is not suitable for the current trend of narrower curtain tracks. In response to this, a single track is currently divided into an upper track and a lower track to solve the above technical problems. In the prior art, a single motor, a curtain track, and two pulleys are used. The output shaft of the single motor is connected to two clutch mechanisms to control the two pulleys. That is, the clutch mechanism needs to switch back and forth between a disengaged state and an engaged state.

[0003] The clutch mechanism includes a clutch member and an iron ring. When the clutch member and the iron ring rotate together, the clutch mechanism is in a disengaged state. When the clutch member and the iron ring rotate relative to each other, the clutch mechanism is in an engaged state. The clutch mechanism can be disengaged or engaged by restricting the iron ring to allow the clutch member to rotate relative to each other.

[0004] For curtains with upper and lower tracks, in order to realize the independent control of the movement of the curtains on one track, two clutch mechanisms need to be set up, one clutch corresponding to each track. Two limiting parts are needed to control the two clutches, and two driving sources are needed to correspond to the two limiting parts, which is costly. Utility Model Content

[0005] The technical problem to be solved by the present invention is that in the prior art, two clutch mechanisms require two limiting members to control, and the two limiting members require two driving sources, which is relatively costly.

[0006] The utility model solves the above-mentioned technical problems through the following technical solutions: a limiting structure includes a driving source, the output shaft of the driving source is connected to a first shaft body, the first shaft body is connected to a transmission structure, the transmission structure is connected to a second shaft body, the first shaft body and the second shaft body are located on both sides of the driving source; the first shaft body is provided with a first limiting block and a third limiting block at a first horizontal height; the second shaft body is provided with a second limiting block and a fourth limiting block at a second horizontal height; the first limiting block and the third limiting block are arranged at intervals along the circumference of the first shaft body, and the second limiting block and the fourth limiting block are arranged at intervals along the circumference of the second shaft body, the angular position of the third limiting block along the circumferential direction of the first shaft body is consistent with the angular position of the fourth limiting block along the circumferential direction of the second shaft body, and the first limiting block and the second limiting block are misaligned in the horizontal projection.

[0007] Specifically, the central axes of the first shaft body and the second shaft body coincide with each other.

[0008] Specifically, the first shaft is connected to a first fixed plate, the second shaft is connected to a second fixed plate, the first limiting block and the third limiting block are formed on the first fixed plate, and the second limiting block and the fourth limiting block are formed on the second fixed plate.

[0009] Specifically, the transmission structure includes a first gear fixedly connected to the first shaft, a transmission shaft, and a fourth gear fixedly connected to the second shaft; the first gear is engaged with the second gear, the fourth gear is engaged with the third gear, and the second gear and the third gear are both fixedly connected to the transmission shaft.

[0010] Specifically, the second gear is consistent with the third gear in size, and the first gear is consistent with the fourth gear in size.

[0011] Specifically, outer rings of the first limiting block and the third limiting block and / or the second limiting block and the fourth limiting block are all provided with teeth.

[0012] Specifically, a first angle α is set between the first limiting block and the third limiting block, and a second angle β is set between the second limiting block and the fourth limiting block; the first angle α ranges from 45° to 157.5°, and the second angle β ranges from 45° to 157.5°.

[0013] Specifically, the first angle α is 120°, and the second angle β is 120°.

[0014] Specifically, the housing of the driving source is provided with two fixing parts.

[0015] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0016] The positive progress of the present invention is that: in the prior art, the active member is fixedly connected to the iron ring, and a first limiting block, a second limiting block, a third limiting block, and a fourth limiting block are provided, and the first limiting block and the third limiting block are at a first horizontal height, corresponding to the first active member at the first horizontal height, while the second limiting block and the fourth limiting block are at a second horizontal height, corresponding to the second active member at the second horizontal height; when it is necessary to limit the first active member, the driving source drives the first shaft so that the first limiting block and the first active member are limited; when it is necessary to limit the second active member, the driving source drives the second shaft so that the second limiting block and the second active member are limited; when it is necessary to limit the first active member and the second active member, the driving source drives the first shaft and the second shaft so that the third limiting block and the first active member are limited, and the fourth limiting block and the second active member are limited. A single driving source can be used to simultaneously limit a single active member or two active members. Correspondingly, a single pulley can be rotated or two pulleys can be rotated simultaneously, ultimately achieving the purpose of opening and closing a single curtain or simultaneously engaging curtains on both sides. In addition, a transmission structure is adopted, and the driving source outputs the first shaft and is transmitted to the second shaft through the transmission structure, thereby achieving the purpose of synchronous rotation of the first shaft and the second shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of one perspective of a restriction structure of the present invention.

[0018] Figure 2 This is a structural diagram of a restriction structure of the utility model from another perspective.

[0019] Figure 3 for Figure 2 Top view in .

[0020] Figure 4 It is a schematic diagram of the first angle α and the second angle β in the present invention.

[0021] Figure 5 This is a side view of a restriction structure of the present utility model.

[0022] Figure 6 This is a schematic structural diagram of the first shaft and the second shaft in the present invention.

[0023] Explanation of the accompanying drawings: 1. Driving source; 2. First shaft; 3. Second shaft; 4. First limiting block; 5. Second limiting block; 6. Third limiting block; 7. Fourth limiting block; 8. First fixed disk; 9. Second fixed disk; 10. First gear; 11. Second gear; 12. Transmission shaft; 13. Third gear; 14. Fourth gear; 15. Teeth; 16. Fixed part; 17. First connecting line; 18. Second connecting line; 19. Third connecting line. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that in the claims and description of this patent, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. In the absence of further restrictions, an element defined by the phrase "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus comprising the element.

[0026] The utility model discloses a restriction structure, such as Figure 1-6 As shown, it includes a driving source 1, the output shaft of the driving source 1 is connected to a first shaft body 2, the first shaft body 2 is connected to a transmission structure, the transmission structure is connected to a second shaft body 3, and the first shaft body 2 and the second shaft body 3 are located on both sides of the driving source 1; the first shaft body 2 is provided with a first limiting block 4 and a third limiting block 6 at a first horizontal height H1; the second shaft body 3 is provided with a second limiting block 5 and a fourth limiting block 7 at a second horizontal height H2; the first limiting block 4 and the third limiting block 6 are arranged at intervals along the circumference of the first shaft body 2, and the second limiting block 5 and the fourth limiting block 7 are arranged at intervals along the circumference of the second shaft body 3, and the angular position of the third limiting block 6 along the circumferential direction of the first shaft body 2 is consistent with the angular position of the fourth limiting block 7 along the circumferential direction of the second shaft body 3, and the first limiting block 4 and the second limiting block 5 are misaligned in the horizontal projection.

[0027] In the prior art, the clutch mechanism of curtains mostly adopts a mechanical clutch method, wherein the clutch mechanism includes an active part, an iron ring, a magnetic bead, a clutch part, a driven part, and a groove provided on the driven part. The iron ring is fixed on the active part, and the groove is adapted to the magnetic bead to realize the clutch function.

[0028] When the limiting iron ring rotates, the active member is restricted from rotating. At this time, the clutch member rotates and drives the driven member to rotate through the magnetic beads, and the clutch member and the driven member are meshed.

[0029] When the iron ring is not restricted from rotating, the active member can also rotate. At this time, when the clutch member rotates, the clutch member will counteract the magnetic beads. Through the adsorption force between the magnetic beads and the iron ring, the iron ring and the active member are driven to rotate simultaneously. The adsorption force between the magnetic beads and the iron ring is greater than the gravity of the iron ring and the active member.

[0030] During this process, the active member and the driven member are always out of mesh.

[0031] The driving source 1 is a single-output motor, which realizes that the output shaft drives the first shaft 2 to rotate by rotation. The rotation of the first shaft 2 drives the second shaft 3 to rotate through the transmission structure. In this application, there are two clutch parts, corresponding to two active parts, two driven parts, and two iron rings.

[0032] The first limiting block 4 is at a first horizontal height H1. In order to make it easier for the first limiting block 4 to limit the rotation of the first iron ring, the first active member is fixedly connected to the first iron ring. By limiting the first active member through the first limiting block 4, the rotation of the first iron ring can be limited. The first active member is at the first horizontal height H1. In the initial state, the first limiting block 4 does not contact the first active member. After the first limiting block 4 contacts and limits the first active member, the rotation of the first active member can be limited. Similarly, the second limiting block 5 is at a second horizontal height H2. The second active member is fixedly connected to the second iron ring. The second active member is also at the second horizontal height H2. In the initial state, the second limiting block 5 does not contact the second active member. After the second limiting block 5 contacts and limits the second active member, the rotation of the second active member can be limited. The driving source 1 drives the first shaft 2 to rotate, and the transmission structure drives the second shaft 3 to rotate, so that the third limiting block 6 and the fourth limiting block 7 are respectively in contact with the first active member and the second active member at the same time. A single driving source 1 can be used to simultaneously limit a single active member or two active members, and correspondingly, a single pulley can be rotated or two pulleys can be rotated simultaneously, ultimately achieving the purpose of opening and closing a single side curtain or simultaneously locking the curtains on both sides.

[0033] Since the first limiting block 4 and the third limiting block 6 need to cooperate with the first active member respectively in different required modes, the first limiting block 4 and the third limiting block 6 are arranged at circumferential intervals at the same height along the first shaft body 2; correspondingly, the second limiting block 5 and the fourth limiting block 7 need to cooperate with the second active member respectively in different required modes, so the second limiting block 5 and the fourth limiting block 7 are arranged at circumferential intervals at the same height along the second shaft body 3, so that it can be ensured that the drive source 1 is pre-set with the corresponding rotation angle, that is, the user can choose whether the limiting structure needs to cooperate with the first active member, with the second active member, or with the first active member and the second active member at the same time. The above three modes of cooperation can be completed by using a single drive source 1, which is less expensive than the existing method of using two drive sources 1.

[0034] At the same time, in a mode where the limiting structure needs to cooperate with the first active member and the second active member at the same time, the fourth limiting block 7 can also cooperate with the second active member while the third limiting block 6 cooperates with the first active member, that is, the initial angular positions of the third limiting block 6 and the fourth limiting block 7 in the axial direction are the same, such as Figure 6 After the driving source 1 drives the first shaft 2 and the second shaft 3 to rotate to the same angle, the final angular positions of the third limiting block 6 and the fourth limiting block 7 in the axial direction are also consistent. In this way, while the third limiting block 6 cooperates with the first active member, the fourth limiting block 7 can also cooperate with the second active member.

[0035] At the same time, in the mode where the limiting structure needs to cooperate with the first active member or the second active member alone, the first limiting block 4 cooperates with the first active member while the second limiting block 5 does not cooperate with the second active member, or the second limiting block 5 cooperates with the second active member while the first limiting block does not cooperate with the first active member, such as Figure 6 As shown, the first limiting block 4 and the second limiting block 5 are misaligned in horizontal projection. After the drive source 1 drives the first shaft 2 and the second shaft 3 to rotate by the same angle, the final angular positions of the first limiting block 4 and the second limiting block 5 in the axial direction are also inconsistent, resulting in a misalignment in horizontal projection. As a result, when the first limiting block 4 and the first active member engage, the second limiting block 5 and the second active member do not engage; and vice versa, when the second limiting block 5 and the second active member engage, the first limiting block 4 and the first active member do not engage.

[0036] When the central axes of the first shaft 2 and the second shaft 3 do not coincide, the first shaft 2 and the second shaft 3 are not in the same vertical plane. Since there is a horizontal distance difference between the first shaft 2 and the second shaft 3, the size of the gears in the corresponding transmission structure changes, ensuring that the first shaft 2 and the second shaft 3 can be transmitted through the above-mentioned transmission structure, so that it can adapt to different installation spaces.

[0037] Preferably, the central axes of the first shaft body 2 and the second shaft body 3 coincide with each other.

[0038] The first shaft 2 and the second shaft 3 are located at both ends of the drive source 1. Preferably, the central axes of the first shaft 2 and the second shaft 3 are arranged to coincide. When the central axes of the first shaft 2 and the second shaft 3 coincide, the first shaft 2 and the second shaft 3 are preferably of the same size, and the gears in the corresponding transmission structure are also of the same size. Identical first and second shafts can be easily processed in the same batch, which improves production efficiency.

[0039] The above-mentioned angular position is defined as follows: when the central axes of the first shaft body 2 and the second shaft body 3 coincide, the horizontal projections of the third limiting block 6 and the fourth limiting block 7 in the axial direction coincide, or the horizontal projections of the third limiting block 6 and the fourth limiting block 7 in the axial direction have a horizontal difference. Figure 4 , is the horizontal projection diagram of the axial direction of the third limiting block 6 and the fourth limiting block 7. The third limiting block 6 and the first connecting line 17 are on the same straight line, and the fourth limiting block 7 and the first connecting line 17 are also on the same straight line. At this time, it is defined that the angular position of the third limiting block 6 along the circumferential direction of the first shaft body 2 is consistent with the angular position of the fourth limiting block 7 along the circumferential direction of the second shaft body 3.

[0040] When the central axes of the first shaft body 2 and the second shaft body 3 do not coincide, that is, when the third limiting block 6 moves horizontally to the left or right to cause an offset, the horizontal projections of the third limiting block 6 and the fourth limiting block 7 in the axial direction have a level difference, but the angular position of the third limiting block 6 along the circumferential direction of the first shaft body 2 is defined as being consistent with the angular position of the fourth limiting block 7 along the circumferential direction of the second shaft body 3.

[0041] Specifically, the first shaft 2 is connected to a first fixed plate 8, the second shaft 5 is connected to a second fixed plate 9, the first limiting block 4 and the third limiting block 6 are formed on the first fixed plate 8, and the second limiting block 5 and the fourth limiting block 7 are formed on the second fixed plate 9.

[0042] Since the first limiting block 4, the second limiting block 5, the third limiting block 6, and the fourth limiting block 7 are often in contact with the first limiting member and the second limiting member, directly setting the above-mentioned limiting blocks on the first shaft 2 or the second shaft 3 will reduce the life of the first shaft 2 or the second shaft 3. Therefore, a first fixed plate 8 is set on the first shaft 2 and a second fixed plate 9 is set on the second shaft 3. The first limiting block 4 and the third limiting block 6 are set on the first fixed plate 8; the second limiting block 5 and the fourth limiting block 7 are set on the second fixed plate 9, which can reduce the wear rate of the first shaft 2 and the second shaft 3.

[0043] Specifically, the transmission structure includes a first gear 10 fixedly connected to the first shaft 2, a transmission shaft 12, and a fourth gear 14 fixedly connected to the second shaft 3; the first gear 10 is engaged with the second gear 11, the fourth gear 14 is engaged with the third gear 13, and the second gear 11 and the third gear 13 are both fixedly connected to the transmission shaft 12.

[0044] Through the transmission of the first gear 10, the second gear 11, the transmission shaft 12, the third gear 13, and the fourth gear 14, it can be ensured that the motor drives the first shaft 2 and the first fixed plate 8 to rotate while also driving the second shaft 3 and the second fixed plate 9 to rotate at the same time, thereby achieving the purpose of simultaneously rotating the first limiting block 4 and the third limiting block 6 on the first fixed plate 8, and the second limiting block 5 and the fourth limiting block 7 on the second fixed plate 9.

[0045] When the central axes of the first shaft 2 and the second shaft 3 coincide, and the first shaft 2 and the second shaft 3 are the same size, the second gear 11 and the third gear 13 are the same size, and the first gear 10 and the fourth gear 14 are the same size. That is, the second gear 11 and the third gear 13 can be processed in the same batch, which is highly efficient, and the first gear 10 and the fourth gear 14 can be processed in the same batch, which is highly efficient. Of course, the central axes of the first shaft 2 and the second shaft 3 can also be arranged in parallel. In this case, the sizes of the first gear 10, the second gear 11, the third gear 13, and the fourth gear 14 can be changed accordingly to ensure that the first shaft 2 and the second shaft 3 rotate synchronously, so that they can adapt to different installation spaces.

[0046] Specifically, the outer rings of the first limiting block 4 and the third limiting block 6 and / or the second limiting block 5 and the fourth limiting block 7 are all provided with teeth 15 .

[0047] The teeth 15 and the teeth on the first and second limiting members are staggered and matched with each other to better engage the first and / or second limiting members. The teeth 15 are also easier to manufacture and produce.

[0048] Specifically, a first angle α is set between the first limiting block and the third limiting block, and a second angle β is set between the second limiting block and the fourth limiting block; the first angle α ranges from 45° to 157.5°, and the second angle β ranges from 45° to 157.5°.

[0049] Specifically, the first angle α is 120°, and the second angle β is 120°. Figure 4 , a second connecting line 18 and a third connecting line 19 are provided, the first angle α is the angle between the first connecting line 17 and the second connecting line 18 , and the second angle β is the angle between the first connecting line 17 and the third connecting line 19 .

[0050] By setting the first angle α and the second angle β as described above, it can be ensured that when the central axes of the first shaft body 2 and the second shaft body 3 coincide, the first angle α and the second angle β do not overlap in the axial horizontal projection along the first shaft body 2 and the second shaft body 3. This ensures that the rotation angle of the rotating motor can be reasonably preset to select the corresponding restriction mode. Preferably, the first angle α and the second angle β can divide the horizontal projection direction of the first fixed disk or the second fixed disk into three equal parts, so that it is relatively easy to set the restriction structure to cooperate with the first active member, cooperate with the second active member, or cooperate with the first active member and the second active member at the same time. Switching between each mode only requires the preset motor to rotate 120°, which is relatively convenient.

[0051] Specifically, the housing of the driving source 1 is provided with two fixing portions 16 .

[0052] The arrangement of the fixing portion 16 enables the drive source 1 to be fixedly installed via the fixing portion 16. The fixing portion 16 is preferably two fixing ears, through which connecting members such as screws can pass.

[0053] Those skilled in the art will readily envision other embodiments of the present invention after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the present invention being indicated by the following claims.

[0054] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A restriction structure, characterized in that: The invention comprises a driving source (1), wherein an output shaft of the driving source (1) is connected to a first shaft (2), the first shaft (2) is connected to a transmission structure, the transmission structure is connected to a second shaft (3), the first shaft (2) and the second shaft (3) are located on both sides of the driving source (1); a first limiting block (4) and a third limiting block (6) at a first horizontal height are provided on the first shaft (2); and a second limiting block (5) and a fourth limiting block (7) at a second horizontal height are provided on the second shaft (3); The first limiting block (4) and the third limiting block (6) are arranged at intervals along the circumference of the first shaft (2), and the second limiting block (5) and the fourth limiting block (7) are arranged at intervals along the circumference of the second shaft (3). The angular position of the third limiting block (6) along the circumferential direction of the first shaft (2) is consistent with the angular position of the fourth limiting block (7) along the circumferential direction of the second shaft (3), so that the first limiting block (4) and the second limiting block (5) are misaligned in horizontal projection.

2. A restriction structure according to claim 1, characterized in that: The central axes of the first shaft body (2) and the second shaft body (3) coincide with each other.

3. A restriction structure according to claim 1, characterized in that: The first shaft (2) is connected to a first fixed disk (8), the second shaft (3) is connected to a second fixed disk (9), the first limiting block (4) and the third limiting block (6) are formed on the first fixed disk (8), and the second limiting block (5) and the fourth limiting block (7) are formed on the second fixed disk (9).

4. A restriction structure according to claim 1, characterized in that: The transmission structure comprises a first gear (10) fixedly connected to the first shaft (2), a transmission shaft (12), and a fourth gear (14) fixedly connected to the second shaft (3); the first gear (10) is meshed with a second gear (11), the fourth gear (14) is meshed with a third gear (13), and the second gear (11) and the third gear (13) are both fixedly connected to the transmission shaft (12).

5. A restriction structure according to claim 4, characterized in that: The second gear (11) and the third gear (13) are of the same size, and the first gear (10) and the fourth gear (14) are of the same size.

6. A restriction structure according to claim 1, characterized in that: The outer rings of the first limiting block (4) and the third limiting block (6) and / or the second limiting block (5) and the fourth limiting block (7) are provided with teeth (15).

7. The restriction structure according to claim 1, characterized in that: A first angle α is provided between the first limiting block (4) and the third limiting block (6), and a second angle β is provided between the second limiting block (5) and the fourth limiting block (7); the first angle α ranges from 45° to 157.5°, and the second angle β ranges from 45° to 157.5°.

8. A restriction structure according to claim 7, characterized in that: The first angle α is 120°, and the second angle β is 120°.

9. The restriction structure according to claim 1, characterized in that: The housing of the driving source (1) is provided with two fixing parts (16).

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