Transmission structure for synchronous rotation of louver blades

Abstract

The present utility model relates to the technical field of louvers, and in particular to a hidden louver wand transmission structure, comprising a mounting bar inserted in a window sash vertical column. The mounting bar has an open front side and comprises a left side plate, a right side plate and a rear side plate; a left rack is slidably arranged on the right side of the left side plate; a right rack is slidably arranged on the left side of the right side plate; a plurality of gears arranged at intervals in the vertical direction are meshed between the left rack and the right rack; through holes, the number and positions of which match the gears, are formed in the rear side plate; the rear end of a rotating shaft for driving blades to rotate passes through the window sash vertical column to be detachably connected to the gears, and the rotating shaft is driven by the gears to rotate; mounting columns are arranged at the rear ends of the gears; the gears pass through the through holes by means of the mounting columns and are detachably connected and fixed to the rear side plate. According to the present utility model, the positions where the gears are meshed with the racks can be conveniently observed and adjusted, the mounting is convenient, and the situation where the rotation of the blades is limited after mounting is completed is avoided; and additionally, in the moving process of the mounting bar and the window sash vertical column, the gears would not fall off, so that subsequent assembling is facilitated.

Description

A transmission structure for synchronous rotation of shutter blades Technical Field

[0001] The utility model belongs to the technical field of blinds, in particular to a transmission structure for a blind hidden pull rod. Background Art

[0002] In order to facilitate the synchronous opening and closing of the blades of the blinds, there are usually three ways: the first way is to connect a pull rod in the middle position of each blade to realize the synchronous rotation and angle adjustment of each blade, commonly known as an exposed pull rod. The pull rod blocks the line of sight and is unpopular in some countries; the second way is to drill holes at one end of each blade and fix an alloy pull rod with equal hole spacing to each blade with screws, and insert a plastic pin with two ends into the center hole of the blade to achieve connection with the window sash column. This pull rod is located on the side and rear of the blade. Although it improves the line of sight blocking, it cannot achieve complete line of sight blocking; the third way is to provide two racks in the window sash column, and a gear is provided at the end of the blade to drive the blade to rotate. The gear passes through the window sash column and is arranged between the two racks, and is meshed with the two racks. The moving gear drives the gear to rotate, thereby driving the blades to rotate synchronously.

[0003] Although the third method can well solve the problem of obstructing vision, it has the following shortcomings: 1. In the process of the gear passing through the window sash column and engaging with the rack, the position of the rack needs to be adjusted to engage with the gear. However, since there are generally multiple blades, multiple gears need to be installed, and the position of the rack needs to be adjusted continuously. Because the rack is set in the window sash column, the engagement between the gear and the rack cannot be seen clearly, resulting in inconvenience in installation. After installation, the ends of the two racks are likely to be uneven, which in turn limits the rotation angle of the blade; 2. In order to facilitate the rotation of the blade, the gear and the rack are usually meshed with a gap. When the assembled window sash column is moved, the gear is easy to fall off. Summary of the Invention

[0004] The purpose of the utility model is to provide a transmission structure for the synchronous rotation of the shutter blades, which is convenient for observing and adjusting the meshing position of the gear and the rack, is easy to install, and will not cause the blade rotation to be restricted after installation; at the same time, the gear will not fall off during the movement of the installation strip and the window sash vertical column, which is convenient for subsequent assembly.

[0005] The utility model is achieved in this way:

[0006] A transmission structure for synchronous rotation of shutter blades, comprising a mounting bar inserted into a window sash vertical column, the mounting bar having an opening at the front side, the mounting bar comprising a left side plate, a right side plate and a rear side plate, a left rack being slidably provided on the right side of the left side plate, a right rack being slidably provided on the left side of the right side plate, a plurality of gears arranged at vertical intervals being meshed between the left rack and the right rack, through holes being provided at vertical intervals on the rear side plate in a number and position matching the gears, a rear end of a rotating shaft for driving the blades to rotate passes through the window sash vertical column and is detachably connected to the gear, and the rotating shaft is driven to rotate by the gear;

[0007] The rear end of the gear is provided with a mounting post, and the gear is detachably connected to the fixing block and fixed to the rear side plate through the mounting post passing through the through hole;

[0008] Or a limit block is provided at the rear side of the rear side plate, a connecting column is provided at the front end of the limit block, and the gear passes through the through hole through the connecting column and is detachably connected to the gear and fixed on the rear side plate.

[0009] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the gear and the mounting column are an integrated structure.

[0010] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the detachable connection method between the mounting column and the fixed block can be: the fixed block is mounted on the mounting column, an annular groove is provided on the mounting column, and a clamping block is provided on the inner ring of the fixed block, and the mounting column is detachably connected to the fixed block by being clamped in the annular groove through the clamping block.

[0011] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the detachable connection method of the mounting column and the fixed block can also be: the fixed block is mounted on the mounting column, the mounting column is provided with an external thread, and the fixed block is provided with an internal thread, and the mounting column is detachably connected to the fixed block by screwing the external thread and the internal thread.

[0012] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the detachable connection between the connecting column and the gear may be: the gear is sleeved on the connecting column and is engaged with the connecting column.

[0013] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the detachable connection between the connecting column and the gear may also be: the gear is sleeved on the connecting column and screwed to the connecting column.

[0014] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the inner side surface of the clamping block includes a frustum at the front end and a cylindrical surface at the rear side of the frustum. The diameter of the frustum is larger at the front and smaller at the rear. The front and rear ends of the clamping block are planes.

[0015] In the above-mentioned transmission structure for synchronous rotation of shutter blades, there are more than two clamping blocks evenly distributed around the circumference.

[0016] In the above-mentioned transmission structure for the synchronous rotation of the shutter blades, the rotating shaft and the gear are detachably connected in a manner as follows: a polygonal hole is provided on the side of the gear away from the mounting column, and a polygonal plug shaft matching the polygonal hole is provided at the rear end of the rotating shaft, and the gear is inserted into the polygonal hole through the polygonal plug shaft to drive the rotating shaft to rotate.

[0017] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the diameter of the rotating shaft is smaller than the diameter of the tooth top circle of the gear.

[0018] In the above-mentioned transmission structure for the synchronous rotation of the shutter blades, left sliders are respectively provided on the front and rear sides of the left rack, and a left guide groove for the sliding of the left slider is provided on the right side of the left side plate; right sliders are respectively provided on the front and rear sides of the right rack, and a right guide groove for the sliding of the right slider is provided on the left side of the right side plate.

[0019] In the above-mentioned transmission structure for synchronous rotation of shutter blades, a left slide groove is provided on the left side of the left side plate, a right slide groove is provided on the right side of the right side plate, and a left guide rail adapted to the left slide groove and a right guide rail adapted to the right slide groove are provided in the vertical column of the window sash.

[0020] In the above-mentioned transmission structure for the synchronous rotation of the shutter blades, more than two left vertical plates are provided on the left side of the left side plate, and the left slide groove is formed between the two adjacent left vertical plates; more than two right vertical plates are provided on the right side of the right side plate, and the right slide groove is formed between the two adjacent right vertical plates.

[0021] In the above-mentioned transmission structure for synchronous rotation of shutter blades, the connection method in which the rotating shaft drives the blades to rotate is: two pins are provided at the front end of the rotating shaft, and two pin holes are provided at the end of the blade for inserting the pins, and the rotating shaft drives the blades to rotate by inserting the pins into the pin holes.

[0022] The outstanding advantages of the utility model compared with the prior art are:

[0023] The front side of the mounting strip of the utility model is open, which is convenient for observing and adjusting the meshing position of the gear and the left rack and the right rack, and is convenient for installation. There will be no situation in which the rotation of the blade is restricted after the installation is completed. The gear of the utility model is fixed to the rear side plate by a detachable connection between the mounting column and the fixing block, so that the left rack, the right rack and the gear are fixed to the mounting strip to form an integral prefabricated component rather than scattered individual parts. During the movement of the mounting strip and the window sash vertical column, the gear will not fall off, which is convenient for subsequent assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of the present utility model;

[0025] Figure 2 is a top view of the utility model;

[0026] FIG3 is an exploded view of the present invention;

[0027] FIG4 is a top view of the mounting strip of the present invention;

[0028] Figure 5 is a perspective view of the gear and mounting post of the present invention;

[0029] FIG6 is a perspective view of the fixing block of the present invention.

[0030] Figure markings: 1. sash vertical column; 1a. left guide rail; 1b. right guide rail; 2. mounting strip; 2a. left side panel; 2a1. left guide groove; 2a2. left slide groove; 2a3. left vertical panel; 2b. right side panel; 2b1. right guide groove; 2b2. right slide groove; 2b3. right vertical panel; 2c. rear side panel; 2c1. through hole; 3. left rack; 3a. left slider; 4. right rack; 4a. right slider; 5. gear; 5a. polygonal hole; 6. mounting column; 6a. annular groove; 7. fixing block; 7a. clamping block; 7a1. frustum; 7a2. cylindrical surface; 7a3. front end face; 7a4. rear end face; 8. blade; 8a. pin hole; 9. rotating shaft; 9a. polygonal plug shaft; 9b. latch. Implementation Method

[0031] The present invention will be further described below with reference to specific embodiments, see Figures 1-6:

[0032] Example 1:

[0033] A transmission structure for the synchronous rotation of shutter blades, including a mounting strip 2 inserted in a window sash vertical column 1, the front side of the mounting strip 2 is open, the mounting strip 2 includes a left side plate 2a, a right side plate 2b and a rear side plate 2c, a left rack 3 is slidably provided on the right side of the left side plate 2a, and a right rack 4 is slidably provided on the left side of the right side plate 2b, a plurality of gears 5 arranged at vertical intervals are engaged between the left rack 3 and the right rack 4, and through holes 2c1 are provided on the rear side plate 2c at vertical intervals, the number and position of which are adapted to the gears 5, the rear end of the rotating shaft 9 that drives the blades 8 to rotate passes through the window sash vertical column 1 and is detachably connected to the gear 5, and the rotating shaft 9 is driven to rotate by the gear 5; a mounting column 6 is provided at the rear end of the gear 5, and the gear 5 is detachably connected to the fixing block 7 through the through hole 2c1 via the mounting column 6 and is fixed to the rear side plate 2c.

[0034] 1-4, first place the left rack 3 on the right side of the left side panel 2a, and the right rack 4 on the left side of the right side 2b, and place the gear 5 between the left rack 3 and the right rack 4. Since the front side of the mounting strip 2 is open, it is convenient to adjust the meshing position of the gear 5 with the left rack 3 and the right rack 4. The mounting column 6 set at the rear end of the gear 5 passes through the through hole 2c1 of the rear side panel 2c and is detachably connected to the fixing block 7. The gear 5 is fixed on the rear side panel 2c. After installing each gear 5, the mounting strip 2 is inserted into the window sash column 1. Finally, the rotating shaft 9 of the blade 8 passes through the window sash column 1 and is detachably connected to the gear 5.

[0035] The front side of the mounting bar 2 of the present invention is open, which is convenient for observing and adjusting the meshing position of the gear 5 with the left rack 3 and the right rack 4, and is convenient for installation, and will not cause the rotation of the blade to be restricted after the installation is completed; the gear 5 of the present invention is detachably connected and fixed to the rear side plate 2c through the mounting column 6 and the fixing block 7, so that the left rack 3, the right rack 4, and the gear 5 are fixed on the mounting bar 2 to form an integral prefabricated part, rather than scattered individual parts. During the movement of the mounting bar 2, the gear 5 will not fall off, which is convenient for subsequent assembly.

[0036] Preferably, the gear 5 and the mounting column 6 are an integrated structure.

[0037] The detachable connection method between the mounting column 6 and the fixing block 7: As shown in Figures 3, 5, and 6, the fixing block 7 is sleeved on the mounting column 6, and an annular groove 6a is provided on the mounting column 6. The inner circle of the fixing block 7 is provided with a clamping block 7a. The mounting column 6 is clamped in the annular groove 6a by the clamping block 7a and is detachably connected to the fixing block 7. The structure is simple, easy to assemble, and easy to process.

[0038] Structure of the clamping block 7a: As shown in Figure 6, the inner side surface of the clamping block 7a includes a frustum 7a1 located at the front end and a cylindrical surface 7a2 located on the rear side of the frustum 7a1. The diameter of the frustum 7a1 is larger at the front and smaller at the rear, which facilitates the clamping block 7a to be clamped into the annular groove 6a; the front end surface 7a3 and the rear end surface 7a4 of the clamping block 7a are flat, making it difficult for the clamping block 7a to fall out of the annular groove 6a.

[0039] In order to facilitate the clamping and to ensure a firm clamping, the clamping blocks 7a are evenly distributed on the circumference of more than two. In this embodiment, the clamping blocks 7a are evenly distributed on the circumference of two.

[0040] The detachable connection between the rotating shaft 9 and the gear 5 is as follows: the gear 5 is provided with a polygonal hole 5a on the side away from the mounting post 6, and the rear end of the rotating shaft 9 is provided with a polygonal plug-in shaft 9a that matches the polygonal hole 5a. The gear 5 is inserted into the polygonal hole 5a via the polygonal plug-in shaft 9a, driving the rotating shaft 9 to rotate. This simple structure is easy to assemble and process. At the same time, the rotating shaft 9 can be tightly fitted with the gear 5, and the rotating shaft 9 is not likely to fall off during the movement of the window sash column 1. In this embodiment, the polygonal hole 5a is a quadrilateral hole, and the polygonal plug-in shaft 9a is a quadrilateral plug-in shaft.

[0041] To prevent the shaft 9 from protruding from the surface of the blade 8 and maintain an aesthetically pleasing overall appearance, as shown in FIG2 , the shaft 9 has a diameter smaller than the addendum diameter of the gear 5. In the prior art, the shaft 9 must be larger than or equal to the addendum diameter of the gear 5. Otherwise, the gap between the shaft 9 and the sash column 1 will be too large, causing the shaft 9 to rotate skewed, which in turn causes the blade 8 to rotate abnormally. However, due to the thickness of the blade 8, if the shaft 9 is too large in diameter, it will protrude from the surface of the blade 8, resulting in an unsightly overall appearance.

[0042] In order to limit the left rack 3 laterally and longitudinally, as shown in Figures 3 and 4, left sliders 3a are respectively provided on the front and rear sides of the left rack 3, and a left guide groove 2a1 for sliding the left slider 3a is provided on the right side of the left side plate 2a; in order to limit the right rack 4 laterally and longitudinally, as shown in Figures 3 and 4, right sliders 4a are respectively provided on the front and rear sides of the right rack 4, and a right guide groove 2b1 for sliding the right slider 4a is provided on the left side of the right side plate 2b.

[0043] In order to facilitate the insertion of the mounting strip 2 into the window sash column 1, a left slide groove 2a2 is provided on the left side of the left side panel 2a, and a right slide groove 2b2 is provided on the right side of the right side panel 2b. A left guide rail 1a adapted to the left slide groove 2a2 and a right guide rail 1b adapted to the right slide groove 2b2 are provided in the window sash column 1.

[0044] The left chute 2a2 is constructed as follows: two or more left vertical plates 2a3 are provided on the left side of the left side panel 2a, with the left chute 2a2 formed between two adjacent left vertical plates 2a3. The right chute 2b2 is constructed as follows: two or more right vertical plates 2b3 are provided on the right side of the right side panel 2b, with the right chute 2b2 formed between two adjacent right vertical plates 2b3. In this embodiment, there are three left and three right vertical plates 2a3, two left and two right chute grooves 2a2, and two left and two right guide rails 1a and 1b, respectively.

[0045] The connection mode of the rotating shaft 9 driving the blade 8 to rotate is as follows: the front end of the rotating shaft 9 is provided with two latches 9b, the end of the blade 8 is provided with two pin holes 8a for inserting the latches 9b, and the rotating shaft 9 drives the blade 8 to rotate by inserting the latches 9b into the pin holes 8a.

[0046] Example 2:

[0047] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that a limit block is provided on the rear side of the rear side plate 2c, and a connecting column is provided at the front end of the limit block. The gear 5 passes through the through hole 2c1 through the connecting column and is detachably connected to the gear 5 and fixed on the rear side plate 2c.

[0048] The connecting post and the gear 5 can be detachably connected by having the gear 5 fit over the connecting post and be clipped into the connecting post. Alternatively, the connecting post and the gear 5 can be detachably connected by having the gear 5 fit over the connecting post and be screwed into the connecting post. In this embodiment, the gear 5 fits over the connecting post and is clipped into the connecting post.

[0049] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A transmission structure for synchronous rotation of shutter blades, characterized by: The invention comprises a mounting strip (2) inserted into a window sash vertical column (1), wherein the mounting strip (2) has an opening at the front side, and comprises a left side plate (2a), a right side plate (2b) and a rear side plate (2c), wherein a left rack (3) is provided on the right side of the left side plate (2a), and a right rack (4) is provided on the left side of the right side plate (2b), wherein a plurality of gears (5) arranged at vertical intervals are engaged between the left rack (3) and the right rack (4), and through holes (2c1) are provided on the rear side plate (2c) at vertical intervals, the number and position of which are adapted to the gears (5), and the rear end of the rotating shaft (9) for driving the blade (8) to rotate passes through the window sash vertical column (1) and is detachably connected to the gear (5), and the rotating shaft (9) is driven to rotate by the gear (5); The rear end of the gear (5) is provided with a mounting column (6), and the gear (5) is detachably connected to the fixing block (7) and fixed on the rear side plate (2c) through the mounting column (6) passing through the through hole (2c1); Alternatively, a limit block is provided on the rear side of the rear side plate (2c), a connecting column is provided at the front end of the limit block, and the gear (5) is detachably connected to the gear (5) and fixed to the rear side plate (2c) through the connecting column and the through hole (2c1).

2. The transmission structure for synchronous rotation of shutter blades according to claim 1, characterized in that: The fixing block (7) is sleeved on the mounting column (6); an annular groove (6a) is provided on the mounting column (6); a clamping block (7a) is provided on the inner ring of the fixing block (7); the mounting column (6) is clamped in the annular groove (6a) by the clamping block (7a) and is detachably connected to the fixing block (7).

3. The transmission structure for synchronous rotation of shutter blades according to claim 2, characterized in that: The inner side surface of the clamping block (7a) comprises a frustum surface (7a1) located at the front end and a cylindrical surface (7a2) located at the rear side of the frustum surface (7a1); the diameter of the frustum surface (7a1) is larger at the front and smaller at the rear; the front end surface (7a3) and the rear end surface (7a4) of the clamping block (7a) are planes.

4. The transmission structure for synchronous rotation of shutter blades according to claim 2, characterized in that: There are more than two clamping blocks (7a) evenly distributed around the circumference.

5. The transmission structure for synchronous rotation of shutter blades according to claim 1, characterized in that: A polygonal hole (5a) is provided on the side of the gear (5) away from the mounting column (6), and a polygonal plug shaft (9a) adapted to the polygonal hole (5a) is provided at the rear end of the rotating shaft (9). The gear (5) is inserted into the polygonal hole (5a) via the polygonal plug shaft (9a) to drive the rotating shaft (9) to rotate.

6. The transmission structure for synchronous rotation of shutter blades according to claim 1, characterized in that: The diameter of the rotating shaft (9) is smaller than the diameter of the tooth top circle of the gear (5).

7. The transmission structure for synchronous rotation of shutter blades according to claim 1, characterized in that: The left rack (3) is provided with left sliders (3a) on the front and rear sides respectively, and the left side plate (2a) is provided with a left guide groove (2a1) on the right side for the left slider (3a) to slide; the right rack (4) is provided with right sliders (4a) on the front and rear sides respectively, and the right side plate (2b) is provided with a right guide groove (2b1) on the left side for the right slider (4a) to slide.

8. The transmission structure for synchronous rotation of shutter blades according to claim 1, characterized in that: The left side of the left side plate (2a) is provided with a left slide groove (2a2), the right side of the right side plate (2b) is provided with a right slide groove (2b2), and the window sash vertical column (1) is provided with a left guide rail (1a) adapted to the left slide groove (2a2) and a right guide rail (1b) adapted to the right slide groove (2b2).

9. The transmission structure for synchronous rotation of shutter blades according to claim 1, characterized in that: The front end of the rotating shaft (9) is provided with two latches (9b), and the end of the blade (8) is provided with two pin holes (8a) for inserting the latches (9b). The rotating shaft (9) drives the blade (8) to rotate by inserting the latches (9b) into the pin holes (8a).