Double-pull-rod type spring roller shutter head

Abstract

The utility model provides a double-pull-rod type spring roller shutter brake head which comprises a shell, a first wire coil, a second wire coil, a first pull rod and a second pull rod, wherein the first wire coil and the second wire coil are rotationally installed in the shell, and the first pull rod and the second pull rod are installed on the shell. The first wire coil and the second wire coil are correspondingly connected with the first pull rod and the second pull rod through pull wires respectively; an outer sleeve is rotationally installed on one side of the shell, the first wire coil is in driving connection with the outer sleeve and used for driving the outer sleeve to rotate clockwise, and the second wire coil is in driving connection with the outer sleeve and used for driving the outer sleeve to rotate anticlockwise; according to the double-pull-rod type spring roller shutter brake head, a traditional annular pull rope and pull bead structure is replaced with the pull rod structure, the risk that the head and the neck of a child are wound by the traditional pull bead and pull rope is avoided, and the use safety is higher; the double-pull-rod structural design is adopted, one pull rod adjusts the roller shutter to ascend, the other pull rod adjusts the roller shutter to descend, the structure is simple, and operation is easy and convenient.

Description

Technical Field

[0001] This utility model relates to the field of roller blind heads, and in particular to a double-pull-rod type spring roller blind head. Background Technology

[0002] Roller blinds, as a common sunshade, light-blocking, and space-dividing device, are widely used in various spaces such as residential, commercial buildings, and industrial sites. Roller blinds are generally equipped with an adjustment head for adjusting the raising and lowering of the curtain. The adjustment head usually has a closed, ring-shaped pull mechanism, which can be a pull cord or a beaded pull. Pulling the pull mechanism adjusts the raising and lowering of the curtain.

[0003] Safety is paramount when using roller blinds, but existing roller blinds cannot guarantee safety. This is especially true for households with young children, who sometimes like to hang the closed loop pull around their necks or put it on their hands while playing. When they are having fun, they often forget that the pull is still hanging around their necks or on their hands, which can lead to falls or more serious accidents when they suddenly run around, making them unsafe to use. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this utility model is to provide a double-pull-rod type spring roller blind stop to overcome the shortcomings of the low safety of existing roller blind stops.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a double-pull-rod type spring roller blind control head, including a housing, a first coil and a second coil rotatably installed inside the housing, and a first pull rod and a second pull rod installed on the housing. The first coil and the second coil are respectively connected to the first pull rod and the second pull rod via pull lines. An outer sleeve is rotatably installed on one side of the housing. The first coil is driven to the outer sleeve to drive the outer sleeve to rotate clockwise, and the second coil is driven to the outer sleeve to drive the outer sleeve to rotate counterclockwise.

[0008] In some embodiments, a central shaft is fixed to one side of the housing, and the outer casing is fitted onto the central shaft; the first spool is driven to the outer casing via a first ratchet assembly, and the second spool is driven to the outer casing via a second ratchet assembly, both the first ratchet assembly and the second ratchet assembly being located inside the outer casing.

[0009] In some embodiments, the lower end of the housing is symmetrically provided with conduits, and the pull wire is threaded through the conduits; the first pull rod and the second pull rod are arranged parallel and spaced apart, and the two pull rods are respectively installed on the corresponding conduits.

[0010] In some embodiments, the first pull rod and the second pull rod have the same structure, both including an inner rod connected to the conduit and an outer rod that slides under the inner rod; a handle is fixed to the lower end of the outer rod, and the pull line passes through the conduit, the inner rod and the outer rod in sequence and is then fixed to the handle.

[0011] In some embodiments, the inner rod is connected to the conduit via a soft rubber connecting tube; a tail plug is fixed to the lower end of the inner rod, and the pull wire passes through the central hole of the tail plug.

[0012] In some embodiments, the second ratchet assembly includes a second connecting seat rotatably mounted on the outside of the central shaft and a second rotating buckle fitted on the central shaft and located at the end of the second connecting seat, the end of the second connecting seat being inserted into the second spool; the second rotating buckle is provided with a plurality of second elastic pawls at equal intervals in a ring, and the inner wall of the outer sleeve is provided with a second ratchet groove that can engage with the second elastic pawls; the second connecting seat is provided with a plurality of second push blocks for pushing the second elastic pawls toward the second ratchet groove.

[0013] In some embodiments, the first ratchet assembly includes a first connecting seat rotatably mounted on the outside of the second spool and a first rotating buckle fitted on the first connecting seat, the end of the first connecting seat being inserted into the first spool; the first rotating buckle is provided with a plurality of first elastic pawls at equal intervals in a ring, and the inner wall of the outer sleeve is provided with a first ratchet groove that can engage with the first elastic pawls; the first connecting seat is provided with a plurality of first push blocks for pushing the first elastic pawls toward the first ratchet groove.

[0014] In some embodiments, a torsion spring is fitted onto the second connector, with one end of the torsion spring connected to the second connector and the other end connected to the first connector.

[0015] In some embodiments, a first connecting shaft is provided inside the housing, and the first connecting shaft is fixed to the central shaft by fastening screws; a second connecting shaft is provided on the second coil, and the second connecting shaft is sleeved on the first connecting shaft and inserted into the second connecting seat; both the second coil and the first connecting seat are sleeved on the second connecting shaft.

[0016] In some embodiments, the housing includes a bottom shell and a bottom shell cover fixed to each other, with the first coil and the second coil both mounted between the bottom shell and the bottom shell cover.

[0017] (III) Beneficial Effects

[0018] The double-pull-rod type spring roller blind control head provided by this utility model has the following advantages compared with the prior art:

[0019] 1) The pull rod structure replaces the traditional loop pull rope and pull bead structure, avoiding the risk of traditional pull beads and pull ropes getting tangled around children's heads and necks, making it safer to use;

[0020] 2) It adopts a double-lever structure design, with one lever adjusting the raising of the roller blind and the other lever adjusting the lowering of the roller blind. The structure is simple and the operation is simple and convenient.

[0021] 3) Through the cooperation of torsion spring, first ratchet assembly and second ratchet assembly, the two coils and two levers can be reset by one spring. When the coils and levers are reset, the ratchet structure will not interfere with the rotation of the outer sleeve, thus enabling continuous adjustment of the roller blind's lifting and lowering, which is convenient to operate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a perspective view of a double-pull-rod type spring roller blind head according to the present invention;

[0024] Figure 2 An exploded view of the double-pull-rod type spring roller shutter head according to this utility model;

[0025] Figure 3 This is a perspective view of the internal structure of the head housing of a double-pull-rod spring roller blind according to this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the first pull rod of the double-pull rod type spring roller blind control head according to this utility model;

[0027] Figure 5 This is an exploded view of the first pull rod of the double-pull-rod type spring roller blind control head according to this utility model;

[0028] Figure 6 This is a schematic diagram of the internal structure of the double-pull-rod type spring roller blind head cover according to this utility model;

[0029] Figure 7 This is a perspective view of the internal structure of the head cover of a double-pull-rod spring roller blind according to this utility model;

[0030] Figure 8This is a perspective view of the connection between the second reel and the second ratchet assembly of a double-pull-rod type spring roller blind control head according to this utility model;

[0031] Figure 9 This is a schematic diagram of the connection between the second ratchet assembly and the outer casing of a double-pull-rod type spring roller blind control head according to this utility model;

[0032] Figure 10 This is a perspective view of the connection between the first reel and the first ratchet assembly in a double-pull-rod type spring roller blind according to this utility model.

[0033] Figure 11 This is a schematic diagram of the connection between the first ratchet assembly and the outer casing of a double-pull-rod type spring roller blind control head according to this utility model;

[0034] Figure 12 This is a perspective view of a double-pull-rod type spring roller blind head cover according to the present invention;

[0035] The component names corresponding to the various reference numerals in the figure are as follows: 1. Housing; 101. Cable guide tube; 102. First connecting shaft; 103. Bottom shell; 104. Bottom shell cover; 2. First coil; 3. Second coil; 301. Second connecting shaft; 4. First pull rod; 41. Inner rod; 42. Outer rod; 43. Handle; 44. Soft rubber connecting tube; 45. Tail plug; 5. Second pull rod; 6. Outer sleeve; 601. First ratchet groove; 602. Second ratchet groove; 7. Central shaft; 8. First ratchet assembly; 81. First connecting seat; 82. First rotating buckle; 811. First push block; 821. First elastic pawl; 9. Second ratchet assembly; 91. Second connecting seat; 92. Second rotating buckle; 911. Second push block; 921. Second elastic pawl; 10. Torsion spring; 11. Fastening screw; 12. Pull cable. Detailed Implementation

[0036] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0037] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0041] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0042] See Figures 1 to 12 This utility model provides a double-pull-rod type spring roller blind head, including a housing 1, a first coil 2 and a second coil 3 rotatably installed inside the housing 1, and a first pull rod 4 and a second pull rod 5 installed on the housing 1. The first coil 2 and the second coil 3 are respectively connected to the first pull rod 4 and the second pull rod 5 via pull wires 12. Both the first coil 2 and the second coil 3 are provided with winding grooves, and pull wires 12 are wound in the winding grooves. One end of the pull wire 12 is fixed to the coil, and the other end is connected to the corresponding pull rod. The pull wires 12 in the first coil 2 and the second coil 3 are wound in opposite directions. When the pull wire 12 of the first coil 2 is pulled down, the first coil 2 rotates clockwise; when the pull wire 12 of the second coil 3 is pulled down, the second coil 3 rotates counterclockwise. An outer sleeve 6 is rotatably installed on one side of the housing 1. In use, the outer sleeve 6 is fitted inside the external roller blind rod. The first coil 2 is driven to rotate clockwise, and the second coil 3 is driven to rotate counterclockwise. This structure replaces the traditional loop pull cord and pull bead structure with a pull rod structure, avoiding the risk of traditional pull beads and pull cords getting tangled around children's heads and necks, making it safer to use; and it adopts a double pull rod structure design, one pull rod adjusts the roller blind to rise and the other pull rod adjusts the roller blind to fall, the structure is simple and easy to operate.

[0043] In some embodiments, such as Figure 2 , Figure 6 and Figure 7 As shown, a central shaft 7 is fixed to one side of the housing 1, and the central shaft 7 mainly serves a supporting function. An outer sleeve 6 is fitted onto the central shaft 7, and the end of the outer sleeve 6 facing away from the housing 1 is engaged with the central shaft 7, thereby restricting the axial sliding of the outer sleeve 6 relative to the central shaft 7 and ensuring that the outer sleeve 6 can only rotate. The first reel 2 is driven to the outer sleeve 6 via a first ratchet assembly 8, and the second reel 3 is driven to the outer sleeve 6 via a second ratchet assembly 9. Both the first ratchet assembly 8 and the second ratchet assembly 9 are located inside the outer sleeve 6. In this structure, when the first lever 4 is pulled, the first coil 2 rotates clockwise. The first coil 2 drives the outer sleeve 6 to rotate clockwise via the first ratchet assembly 8. At this time, under the action of the second ratchet assembly 9, the clockwise rotation of the outer sleeve 6 will not interfere with the second coil 3, and the second coil 3 can remain stationary. When the second lever 5 is pulled, the second coil 3 rotates counterclockwise. The second coil 3 drives the outer sleeve 6 to rotate counterclockwise via the second ratchet assembly 9. At this time, under the action of the first ratchet assembly 8, the counterclockwise rotation of the outer sleeve 6 will not interfere with the first coil 2, and the first coil 2 can remain stationary, thus ensuring the reliability of the function.

[0044] In some embodiments, such as Figures 3 to 5 As shown, a threading tube 101 is symmetrically arranged at the lower end of the housing 1, and a pull wire 12 is threaded through the threading tube 101. The first pull rod 4 and the second pull rod 5 are arranged parallel and spaced apart, and the two pull rods are respectively installed on the corresponding threading tube 101. In order to simplify the structure, the first pull rod 4 and the second pull rod 5 have the same structure. Both pull rods include an inner rod 41 connected to the threading tube 101 and an outer rod 42 that slides on the lower side of the inner rod 41. The outer rod 42 can slide relative to the inner rod 41. A handle 43 is fixed to the lower end of the outer rod 42. The pull wire 12 passes through the threading tube 101, the inner rod 41 and the outer rod 42 in sequence and is fixed to the handle 43. When the handle 43 is pulled down, the handle 43 drives the outer rod 42 and the pull wire 12 to slide downward, thereby driving the corresponding coil to rotate.

[0045] In some embodiments, such as Figures 3 to 5 As shown, the inner rod 41 is connected to the conduit 101 via a soft rubber connecting tube 44; a tail plug 45 is fixed to the lower end of the inner rod 41, and the pull wire 12 is threaded through the central hole of the tail plug 45.

[0046] In some embodiments, such as Figures 6 to 9As shown, the second ratchet assembly 9 includes a second connecting seat 91 rotatably mounted on the outside of the central shaft 7 and a second rotating buckle 92 fitted onto the central shaft 7 and located at the end of the second connecting seat 91. Both the second connecting seat 91 and the second rotating buckle 92 can rotate relative to the central shaft 7. The end of the second connecting seat 91 is inserted into the second coil 3, which can drive the second connecting seat 91 to rotate, and the second connecting seat 91 can drive the second rotating buckle 92 to rotate. The second rotating buckle 92 has a plurality of second elastic pawls 921 arranged in a ring at equal intervals. The second rotating buckle 92 is made of plastic, which gives the second elastic pawls 921 a certain degree of elasticity. The inner wall of the outer sleeve 6 is provided with a second ratchet groove 602 that can engage with the second elastic pawls 921. Under normal conditions, the second elastic pawls 921 are disengaged from the second ratchet groove 602. The second connecting seat 91 is provided with a plurality of second push blocks 911 for pushing the second elastic pawl 921 toward the second ratchet groove 602. When the second coil 3 drives the second connecting seat 91 to rotate, the second push block 911 first pushes the second elastic pawl 921 to engage with the second ratchet groove 602, and then pushes the second elastic pawl 921 to make the second rotating buckle 92 rotate. The second rotating buckle 92 drives the outer sleeve 6 to rotate counterclockwise through the second elastic pawl 921.

[0047] In some embodiments, such as Figure 6 , Figure 7 , Figures 10 to 12 As shown, the first ratchet assembly 8 and the second ratchet assembly 9 have similar structures and principles. The first ratchet assembly 8 includes a first connecting seat 81 rotatably mounted on the outside of the second spool 3 and a first rotating buckle 82 fitted on the first connecting seat 81. The end of the first connecting seat 81 is inserted into the first spool 2. The first spool 2 can drive the first connecting seat 81 to rotate, and the first connecting seat 81 can drive the first rotating buckle 82 to rotate. The first rotating buckle 82 has a plurality of first elastic pawls 821 arranged in a ring at equal intervals. The first rotating buckle 82 is made of plastic, which gives the first elastic pawls 821 a certain degree of elasticity. The inner wall of the outer sleeve 6 is provided with a first ratchet groove 601 that can engage with the first elastic pawls 821. Under normal conditions, the first elastic pawls 821 are disengaged from the first ratchet groove 601. The first connecting seat 81 is provided with a plurality of first push blocks 811 for pushing the first elastic pawl 821 toward the first ratchet groove 601. When the first coil 2 drives the first connecting seat 81 to rotate, the first push block 811 first pushes the first elastic pawl 821 toward the first ratchet groove 601 to make the two engage. Then the first push block 811 pushes the first elastic pawl 821 to make the first rotating buckle 82 rotate. The first rotating buckle 82 drives the outer sleeve 6 to rotate clockwise through the first elastic pawl 821.

[0048] In some embodiments, such as Figure 2 and Figure 7As shown, a torsion spring 10 is fitted onto the second connecting seat 91. One end of the torsion spring 10 is connected to the second connecting seat 91, and the other end is connected to the first connecting seat 81. This structure, through the cooperation of the torsion spring 10, the first ratchet assembly 8, and the second ratchet assembly 9, allows for the reset of the two coils and two levers via a single spring. When the coils and levers reset, the ratchet structure does not interfere with the rotation of the outer casing, thus enabling continuous adjustment of the roller blind's height and movement, making operation convenient. For example, when pulling down a lever to lower the roller blind, releasing the lever resets it, and the roller blind stops (due to the ratchet structure, the roller blind will not rise); pulling down the lever again causes the roller blind to continue lowering, thus allowing for continuous adjustment of the roller blind's descent, making it easy to use.

[0049] In some embodiments, such as Figure 2 and Figure 6 As shown, a first connecting shaft 102 is provided inside the housing 1, and the first connecting shaft 102 is fixed to the central shaft 7 by fastening screws 11; a second connecting shaft 301 is provided on the second coil 3, and the second connecting shaft 301 is sleeved on the first connecting shaft 102 and inserted into the second connecting seat 91; both the second coil 3 and the first connecting seat 81 are sleeved on the second connecting shaft 301. The housing 1 includes a bottom shell 103 and a bottom shell cover 104 that are fixed to each other, and the first coil 2 and the second coil 3 are both installed between the bottom shell 103 and the bottom shell cover 104.

[0050] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A double-pull-rod type spring roller blind control head, characterized in that: The device includes a housing (1), a first coil (2) and a second coil (3) rotatably mounted inside the housing (1), and a first pull rod (4) and a second pull rod (5) mounted on the housing (1). The first coil (2) and the second coil (3) are respectively connected to the first pull rod (4) and the second pull rod (5) via pull wires (12). An outer sleeve (6) is rotatably mounted on one side of the housing (1). The first coil (2) is driven to the outer sleeve (6) to drive the outer sleeve (6) to rotate clockwise, and the second coil (3) is driven to the outer sleeve (6) to drive the outer sleeve (6) to rotate counterclockwise.

2. The double-pull-rod type spring roller blind control head as described in claim 1, characterized in that: A central shaft (7) is fixed on one side of the housing (1), and the outer sleeve (6) is fitted onto the central shaft (7); the first spool (2) is driven to the outer sleeve (6) through a first ratchet assembly (8), and the second spool (3) is driven to the outer sleeve (6) through a second ratchet assembly (9). Both the first ratchet assembly (8) and the second ratchet assembly (9) are located inside the outer sleeve (6).

3. The double-pull-rod type spring roller blind control head as described in claim 1, characterized in that: The lower end of the housing (1) is symmetrically provided with a conduit (101), and the pull wire (12) is threaded through the conduit (101); the first pull rod (4) and the second pull rod (5) are arranged in parallel and at intervals, and the two pull rods are respectively installed on the corresponding conduit (101).

4. The double-pull-rod type spring roller blind control head as described in claim 3, characterized in that: The first pull rod (4) and the second pull rod (5) have the same structure, both including an inner rod (41) connected to the conduit (101) and an outer rod (42) that slides on the lower side of the inner rod (41); the lower end of the outer rod (42) is fixed with a handle (43), and the pull line (12) passes through the conduit (101), the inner rod (41) and the outer rod (42) in sequence and is then fixed on the handle (43).

5. The double-pull-rod type spring roller blind control head as described in claim 4, characterized in that: The inner rod (41) is connected to the threading tube (101) through a soft rubber connecting tube (44); a tail plug (45) is fixed at the lower end of the inner rod (41), and the pull wire (12) is threaded through the central hole of the tail plug (45).

6. The double-pull-rod type spring roller blind control head as described in claim 2, characterized in that: The second ratchet assembly (9) includes a second connecting seat (91) rotatably mounted on the outside of the central shaft (7) and a second rotating buckle (92) fitted on the central shaft (7) and located at the end of the second connecting seat (91). The end of the second connecting seat (91) is inserted into the second coil (3). The second rotating buckle (92) is provided with a plurality of second elastic pawls (921) arranged in a ring at equal intervals. The inner wall of the outer sleeve (6) is provided with a second ratchet groove (602) that can engage with the second elastic pawls (921). The second connecting seat (91) is provided with a plurality of second push blocks (911) for pushing the second elastic pawls (921) toward the second ratchet groove (602).

7. The double-pull-rod type spring roller blind control head as described in claim 6, characterized in that: The first ratchet assembly (8) includes a first connecting seat (81) rotatably mounted on the outside of the second spool (3) and a first rotating buckle (82) fitted on the first connecting seat (81). The end of the first connecting seat (81) is inserted into the first spool (2). The first rotating buckle (82) is provided with a plurality of first elastic pawls (821) at equal intervals in a ring. The inner wall of the outer sleeve (6) is provided with a first ratchet groove (601) that can engage with the first elastic pawls (821). The first connecting seat (81) is provided with a plurality of first push blocks (811) for pushing the first elastic pawls (821) into the first ratchet groove (601).

8. The double-pull-rod type spring roller blind control head as described in claim 7, characterized in that: A torsion spring (10) is fitted on the second connecting seat (91), one end of which is connected to the second connecting seat (91) and the other end is connected to the first connecting seat (81).

9. The double-pull-rod type spring roller blind control head as described in claim 7, characterized in that: The housing (1) is provided with a first connecting shaft (102), which is fixed to the central shaft (7) by fastening screws (11); the second coil (3) is provided with a second connecting shaft (301), which is sleeved on the first connecting shaft (102) and inserted into the second connecting seat (91); the second coil (3) and the first connecting seat (81) are both sleeved on the second connecting shaft (301).

10. The double-pull-rod type spring roller blind control head as described in claim 1, characterized in that: The housing (1) includes a bottom shell (103) and a bottom shell cover (104) that are fixed to each other, and the first coil (2) and the second coil (3) are both installed between the bottom shell (103) and the bottom shell cover (104).

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