Regulation and control device of venetian blind

Abstract

The utility model belongs to the technical field of curtains. The problem that in the prior art, a louver is poor in universality is solved. The regulation and control device of the venetian blind comprises a shell, a first rope pulling wheel, a winding wheel, a spring storage wheel and a second rope pulling wheel are sequentially and rotationally arranged in the shell in the length direction of the shell, a volute spiral reed is arranged between the winding wheel and the spring storage wheel, and a first gear and a second gear which are arranged in an up-down stacked mode are arranged on the winding wheel. The spring storage wheel is provided with a third gear and a fourth gear which are stacked up and down, the first rope pulling wheel and the second rope pulling wheel are provided with a fifth gear and a sixth gear respectively, the outer diameters of the fifth gear, the second gear and the first gear are sequentially increased, and the outer diameters of the sixth gear, the fourth gear and the third gear are sequentially increased; the fifth gear is meshed with the second gear through a first transition gear, the sixth gear is meshed with the fourth gear through a second transition gear, and the first gear is meshed with the third gear. The venetian blind has the advantage of being capable of improving use universality.

Description

Technical Field

[0001] The utility model belongs to the technical field of curtains and relates to a control device for a venetian blind. Background Art

[0002] Existing cordless venetian blinds usually have a crossbeam structure. A control device for the venetian blind is installed inside the crossbeam structure. A wire winding wheel is arranged inside the control device, and a wire harness connected to the lower beam of the venetian blind is also wound around the wire winding wheel. By controlling the rotation of a spring storage wheel inside the control device, the up-and-down movement or stop of the lower beam of the venetian blind can be achieved.

[0003] For example, a cord-pulling hidden venetian blind (application number: 201922305991.5) in a Chinese patent document previously declared by the applicant includes a crossbeam body. A power device is arranged on the crossbeam body. The power device includes a power source with a power gear. Wire winding wheels are arranged on both sides of the power source. The wire winding wheel includes a bushing. A passive gear is arranged at one end of the bushing, and a wire blocking plate is arranged at the other end. The passive gear on the wire winding wheel meshes with the power gear. Guide inclined surfaces are provided on the inner end surface of the passive gear and the inner end surface of the wire blocking plate. The distance between the top and the bottom between the passive gear and the wire blocking plate is greater at the top than at the bottom.

[0004] The following deficiencies exist in the use of the cord-pulling hidden venetian blind: Since the sizes of the crossbeam structures of venetian blinds with different specifications are fixed, the sizes of the control devices installed inside the crossbeam structures and the sizes of the wire winding wheels of the control devices are also fixed. This makes the maximum vertical length of venetian blinds with different specifications also fixed. As a result, the cord-pulling hidden venetian blind has certain limitations when facing windows with extremely long lengths, and thus the versatility of the cord-pulling hidden venetian blind is relatively poor. Summary of the Invention

[0005] The purpose of the utility model is to provide a control device for a venetian blind in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is how to improve the versatility of the use of venetian blinds.

[0006] The purpose of the utility model can be achieved by the following technical solutions:

[0007] A control device for a louver curtain, comprising a housing, in which a first cable pulley, a winding wheel, a spring storage wheel and a second cable pulley are sequentially rotatably arranged along the length direction thereof. A scroll spring piece is arranged between the winding wheel and the spring storage wheel. It is characterized in that a first gear and a second gear are stacked up and down on the winding wheel, a third gear and a fourth gear are stacked up and down on the spring storage wheel, a fifth gear and a sixth gear are respectively arranged on the first cable pulley and the second cable pulley, the outer diameters of the fifth gear, the second gear and the first gear increase in sequence, the outer diameters of the sixth gear, the fourth gear and the third gear increase in sequence, and the fifth gear and the second gear are meshed through a first intermediate gear, the sixth gear and the fourth gear are meshed through a second intermediate gear, and the first gear and the third gear are meshed.

[0008] In the control device for the louver curtain, a first gear is stacked on the winding wheel and a second gear meshing with the fifth gear on the first cable pulley are provided. At the same time, a third gear meshing with the first gear and a fourth gear meshing with the sixth gear on the second cable pulley are stacked on the spring storage wheel. In addition, the outer diameters of the fifth gear, the second gear and the first gear increase in sequence, and the outer diameters of the sixth gear, the fourth gear and the third gear increase in sequence, so as to change the transmission ratios between the winding wheel and the first cable pulley and between the spring storage wheel and the second cable pulley, enabling the first cable pulley and the second cable pulley to rotate several more turns relative to the winding wheel and the spring storage wheel. As a result, driven by the winding wheel and the spring storage wheel, the first cable pulley and the second cable pulley can drive the lower beam of the louver curtain to move downward by a greater distance, thereby achieving a breakthrough in the maximum vertical length of the louver curtain under the same size of the control device and improving the universality of use of the louver curtain.

[0009] In the above control device for a louver curtain, the outer diameters of the first intermediate gear, the second intermediate gear, the second gear and the fourth gear are the same, and the outer diameters of the fifth gear and the sixth gear are the same. By setting the outer diameters of the first intermediate gear, the second intermediate gear, the second gear and the fourth gear to be the same, on the one hand, the first intermediate gear and the second intermediate gear can make the fifth gear and the second gear as well as the sixth gear and the fourth gear mesh better, and on the other hand, it will not affect the transmission ratios between the winding wheel and the first cable pulley and between the spring storage wheel and the second cable pulley, making the transmission ratios between the winding wheel and the first cable pulley and between the spring storage wheel and the second cable pulley more accurate. In addition, by setting the outer diameters of the fifth gear and the sixth gear to be the same, the transmission ratios between the winding wheel and the first cable pulley and between the spring storage wheel and the second cable pulley are kept consistent, so that the up and down movement of the lower beam of the louver curtain is more stable, avoiding the situation of unilateral inclination.

[0010] In the above-mentioned control device for a louver curtain, the transmission ratio between the second gear and the fifth gear is 18:13, and the transmission ratio between the fourth gear and the sixth gear is 18:13. The above-mentioned transmission ratios between the second gear and the fifth gear and between the fourth gear and the sixth gear are more reasonable, enabling the maximum vertical length of a 1-inch louver curtain to increase from 78 inches to 96 inches, thereby improving the universality of use of the louver curtain.

[0011] In the above-mentioned control device for a louver curtain, a third pull rope wheel is also rotatably arranged in the housing. A seventh gear is provided on the third pull rope. The seventh gear meshes with the fifth gear through a third intermediate gear. The outer diameters of the third intermediate gear and the first intermediate gear are the same, and the outer diameters of the seventh gear and the fifth gear are the same. By adding the third pull rope wheel, when the width of the louver curtain is relatively large, pull ropes can be arranged on both sides and in the middle of the louver curtain, making the up and down movement of the louver curtain smoother and more stable.

[0012] In the above-mentioned control device for a louver curtain, the housing includes a detachable upper housing and a lower housing. The upper ends of the third pull rope wheel, the first pull rope wheel, the winding wheel, the spring storage wheel, and the second pull rope wheel are respectively rotatably embedded in the upper housing. The seventh gear, the third intermediate gear, the fifth gear, the first intermediate gear, the second gear, the fourth gear, the second intermediate gear, and the sixth gear are respectively rotatably embedded in the lower housing. This structure can, on the one hand, facilitate the assembly of the third pull rope wheel, the first pull rope wheel, the winding wheel, the spring storage wheel, the third intermediate gear, the first intermediate gear, and the second pull rope wheel, and on the other hand, enable the fifth gear, the first intermediate gear, and the second gear to mesh better, and the sixth gear, the second intermediate gear, and the fourth gear to mesh better.

[0013] Compared with the prior art, the advantages of the control device for this louver curtain are as follows: By changing the transmission ratios between the winding wheel and the first pull rope wheel, between the winding wheel and the third pull rope wheel, and between the spring storage wheel and the second pull rope wheel, the first pull rope wheel, the second pull rope wheel, and the third pull rope wheel can rotate several more turns relative to the winding wheel and the spring storage wheel. As a result, the first pull rope wheel, the second pull rope wheel, and the third pull rope wheel can drive the lower beam of the louver curtain to move downward by a greater distance, thereby achieving a breakthrough in the maximum vertical length of the louver curtain under the same size of the control device and improving the universality of use of the louver curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic three-dimensional structure diagram of the control device for this louver curtain.

[0015] Figure 2 is a cross-sectional view of the control device for this louver curtain.

[0016] Figure 3This is an exploded view of the control device of the venetian blind.

[0017] In the figure, 1 is the housing; 1a is the upper housing; 1b is the lower housing; 2 is the first pull rope wheel; 2a is the fifth gear; 3 is the winding wheel; 3a is the first gear; 3b is the second gear; 4 is the spring storage wheel; 4a is the third gear; 4b is the fourth gear; 5 is the second pull rope wheel; 5a is the sixth gear; 6 is the first intermediate gear; 7 is the second intermediate gear; 8 is the third pull rope wheel; 8a is the seventh gear; 9 is the third intermediate gear. Detailed implementation mode

[0018] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0019] A control device for a venetian blind, referring to Figures 1-3 , includes a housing 1. Inside the housing 1, a first pull rope wheel 2, a winding wheel 3, a spring storage wheel 4 and a second pull rope wheel 5 are sequentially rotatably arranged along its length direction. A scroll spring piece (not shown in the figure) is arranged between the winding wheel 3 and the spring storage wheel 4. The two ends of the scroll spring piece are respectively fixed to the winding wheel 3 and the spring storage wheel 4, and the scroll spring piece is wound in an S shape between the winding wheel 3 and the spring storage wheel 4. When the lower beam of the venetian blind descends, the downward pull amount of the lower beam increases, and the gravity of the venetian blind will increase accordingly. Correspondingly, after the winding wheel 3 rotates, the scroll spring piece on the spring storage wheel 4 is continuously wound onto the winding wheel 3, and the winding and restoring force of the scroll spring piece also increases accordingly. When the lower beam of the venetian blind rises, the downward pull amount of the lower beam decreases, and the gravity of the venetian blind will decrease accordingly. Correspondingly, the scroll spring piece wound onto the winding wheel 3 is continuously rewound onto the spring storage wheel 4, and the winding and restoring force of the scroll spring piece also decreases accordingly, so that the force on the venetian blind after rising or falling can still remain balanced; on the winding wheel 3, there are a first gear 3a and a second gear 3b stacked up and down, on the spring storage wheel 4, there are a third gear 4a and a fourth gear 4b stacked up and down, on the first pull rope wheel 2 and the second pull rope wheel 5, there are a fifth gear 2a and a sixth gear 5a respectively. The outer diameters of the fifth gear 2a, the second gear 3b and the first gear 3a increase in sequence, the outer diameters of the sixth gear 5a, the fourth gear 4b and the third gear 4a increase in sequence, and the fifth gear 2a and the second gear 3b are meshed through a first intermediate gear 6, the sixth gear 5a and the fourth gear 4b are meshed through a second intermediate gear 7, and the first gear 3a and the third gear 4a are meshed.

[0020] Specifically, referring to Figures 1-3, the outer diameters of the first intermediate gear 6, the second intermediate gear 7, the second gear 3b, and the fourth gear 4b are the same, and the outer diameters of the fifth gear 2a and the sixth gear 5a are the same. In this embodiment, it is preferred that the transmission ratio between the second gear 3b and the fifth gear 2a is 18:13, and the transmission ratio between the fourth gear 4b and the sixth gear 5a is 18:13.

[0021] Further, referring to Figures 1-3 , a third cable pulley 8 is also rotatably provided in the housing 1. A seventh gear 8a is provided on the third cable. The seventh gear 8a meshes with the fifth gear 2a through a third intermediate gear 9. The outer diameters of the third intermediate gear 9 and the first intermediate gear 6 are the same, and the outer diameters of the seventh gear 8a and the fifth gear 2a are the same.

[0022] More specifically, referring to Figures 1-3 , the housing 1 includes an upper housing 1a and a lower housing 1b that are detachably connected. The upper ends of the third cable pulley 8, the first cable pulley 2, the winding wheel 3, the spring storage wheel 4, and the second cable pulley 5 are respectively rotatably embedded in the upper housing 1a. The seventh gear 8a, the third intermediate gear 9, the fifth gear 2a, the first intermediate gear 6, the second gear 3b, the fourth gear 4b, the second intermediate gear 7, and the sixth gear 5a are respectively rotatably embedded in the lower housing 1b.

[0023] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A control device for a louver curtain, comprising a housing (1), in which a first drawstring wheel (2), a winding wheel (3), a spring storage wheel (4) and a second drawstring wheel (5) are sequentially rotatably arranged along the length direction of the housing (1). A scroll spring piece is arranged between the winding wheel (3) and the spring storage wheel (4), and is characterized in that, The winding wheel (3) is provided with a first gear (3a) and a second gear (3b) which are stacked up and down. The spring storage wheel (4) is provided with a third gear (4a) and a fourth gear (4b) which are stacked up and down. The first rope pulling wheel (2) and the second rope pulling wheel (5) are respectively provided with a fifth gear (2a) and a sixth gear (5a). The outer diameters of the fifth gear (2a), the second gear (3b) and the first gear (3a) increase in sequence. The outer diameters of the sixth gear (5a), the fourth gear (4b) and the third gear (4a) increase in sequence. And the fifth gear (2a) and the second gear (3b) are meshed through a first idler gear (6). The sixth gear (5a) and the fourth gear (4b) are meshed through a second idler gear (7). The first gear (3a) and the third gear (4a) are meshed.

2. The control device for a louver curtain according to claim 1, characterized in that, The outer diameters of the first idler gear (6), the second idler gear (7), the second gear (3b) and the fourth gear (4b) are the same. The outer diameters of the fifth gear (2a) and the sixth gear (5a) are the same.

3. The control device for a louver curtain according to claim 2, characterized in that, The transmission ratio of the second gear (3b) and the fifth gear (2a) is 18:

13. The transmission ratio of the fourth gear (4b) and the sixth gear (5a) is 18:

13.

4. The control device for a louver curtain according to claim 2 or 3, characterized in that, A third rope pulling wheel (8) is also rotatably arranged in the housing (1). A seventh gear (8a) is arranged on the third rope. The seventh gear (8a) is meshed with the fifth gear (2a) through a third idler gear (9). The outer diameters of the third idler gear (9) and the first idler gear (6) are the same. The outer diameters of the seventh gear (8a) and the fifth gear (2a) are the same.

5. The regulating device for a louver curtain according to claim 4, characterized in that, The housing (1) includes an upper housing (1a) and a lower housing (1b) which are detachably connected. The upper ends of the third rope pulling wheel (8), the first rope pulling wheel (2), the winding wheel (3), the spring storage wheel (4) and the second rope pulling wheel (5) are respectively rotatably embedded on the upper housing (1a). The seventh gear (8a), the third idler gear (9), the fifth gear (2a), the first idler gear (6), the second gear (3b), the fourth gear (4b), the second idler gear (7) and the sixth gear (5a) are respectively rotatably embedded on the lower housing (1b).

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