A pull rod mechanism for a pull rod type rolling curtain

Abstract

This utility model relates to the field of roller blind technology and discloses a pull rod mechanism for a pull rod type roller blind, including: a mounting base and a pull rod. The mounting base is provided with a pull cord for driving the roller blind drum to rotate circumferentially. One end of the pull cord is an external force pull-down end. The pull rod includes an outer rod and an inner rod that slides inside the outer rod. The external force pull-down end is connected to the outer rod. A connecting sleeve is provided inside the inner rod. A first thread hole corresponding to the pull cord is formed on the inner side of the connecting sleeve. A rope is connected between the connecting sleeve and the mounting base. An elastic element is provided between the inner rod and the connecting sleeve. Through the elastic force of the elastic element, the upper end of the inner rod abuts against the mounting base. In this utility model's pull rod mechanism for a pull rod type roller blind, the pull rod includes an inner rod and an outer rod. Pulling down the outer rod drives the roller blind fabric to rise. The inner rod portion of the pull rod always abuts against the mounting base, preventing the pull cord from being exposed and causing danger, ensuring safe and reliable use.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling blinds, and in particular to a pull rod mechanism of a pull rod type rolling blind. Background Art

[0002] Roller blinds are one type of window decoration products. They are made by processing the curtain fabric with resin and rolling it into a drum shape. They are raised and lowered by a pull rope or chain. The operation is simple and convenient. The roller blinds include two relatively arranged fixing frames, which are used to fix the roller blinds on the wall. The roller blind rod is arranged between the two fixing frames. Because different users have different lighting requirements at different time periods, the roller blinds need to stay at the required height. Some existing pull-rod roller blinds include a roller blind cylinder for connecting the curtain fabric. The roller blind cylinder rotates in the circumference to realize the functions of rolling up and lowering the curtain fabric. Some existing pull-rod roller blinds pull the pull rope down by pulling down the pull rod handle, and then drive the roller blind cylinder to rotate. After the pull rod handle is pulled down, a part of the pull rope inside it will be exposed. At this time, this part of the exposed rope body will be entangled with external objects. If some users (especially children and the elderly) accidentally put their hands on the exposed rope body, they may also be entangled and unable to get out, cut their limbs, etc., and the safety of use is low. Utility Model Content

[0003] The cam is a device for activating a pull rod assembly of a roller blind according to claim 1, wherein the pull rod has a first end which is adapted to move the roller blind upwards and downwards and wherein the pull rod has a first end which is adapted to move the roller blind upwards and downwards and wherein the pull rod has a first end which is adapted to move the roller blind downwards and upwards.

[0004] Optionally, a universal connection portion is provided between the upper end of the inner rod and the mounting seat, and the universal connection portion includes an arc portion provided at the upper end of the inner rod and an arc groove provided on the mounting seat, and the arc portion corresponds to the arc groove.

[0005] Optionally, an end cover is fixedly provided on the upper end of the inner rod, one end of the elastic member abuts against the bottom of the end cover, and the other end of the elastic member abuts against the upper side of the connecting sleeve, and the end cover is provided with a second wire passing hole for passing the pull rope and the rope body.

[0006] Optionally, the end cover is fixed to the upper end of the inner rod by ultrasonic welding.

[0007] Optionally, the elastic member is a compression spring, and the pull rope and the rope body both pass through the inner diameter hole of the elastic member.

[0008] Optionally, a first limiting portion is provided on the upper portion of the rope body, and a first clamping groove for engaging with the first limiting portion for limiting position is provided on the mounting seat.

[0009] Optionally, the rope body includes a first rope body and a second rope body, a first connecting portion is formed between the lower portion of the first rope body and the connecting sleeve, a second connecting portion is formed between the lower portion of the second rope body and the connecting sleeve, and the first connecting portion and the second connecting portion are symmetrically distributed on the connecting sleeve.

[0010] Optionally, a shock-absorbing soft sleeve is provided on the outer wall of the upper end of the inner rod, and in a normal state, the upper end of the outer rod abuts against the lower side of the shock-absorbing soft sleeve.

[0011] Optionally, a handle is fixedly provided at the bottom of the outer rod, a second limiting portion is provided at the external force pull-down end, and a second clamping groove for limiting the second limiting portion is provided on the handle.

[0012] Optionally, a rotating disk and a coil spring for driving the rotating disk to reverse and reset are provided on the mounting seat, the rotating disk is connected to the rolling shutter drum and rotate synchronously, the pull rope is wound in the annular groove of the rotating disk, and the end of the pull rope away from the external force pulling end is clamped in the third clamping groove of the rotating disk, and two guide columns are symmetrically arranged on the mounting seat, one of which is rotatably sleeved with a rotating wheel, the pull rope is pressed against the rotating wheel, and the rotating wheel is driven to rotate by the pull rope.

[0013] Compared with the prior art, the pull rod mechanism of the pull rod type roller blind of the utility model comprises an inner rod and an outer rod, and the roller blind cloth is driven to rise by pulling down the outer rod, and the inner rod part of the pull rod always abuts against the mounting seat, so as to avoid the danger of the pull rope being exposed, and the use is safe and reliable; a universal connection part is arranged between the upper end of the inner rod and the mounting seat, so that the user can pull down the outer rod at different angles according to the needs, and the use is convenient; a first clamping groove for engaging and limiting with the first limiting part is arranged on the mounting seat, and the clamping and assembly are convenient; the first connecting part and the second connecting part are symmetrically distributed on the connecting sleeve, so that the upward pulling force of the connecting sleeve by the two rope bodies is balanced, and the problem of tilting and stagnation caused by the unbalanced force of the connecting sleeve is avoided, and the use is reliable; the shock-absorbing soft sleeve can prevent the upper end of the outer rod from directly hitting the mounting seat to cause structural damage, and prolong the service life; according to the different winding directions of the pull rope on the rotating disk, one of the guide pillars can be selected to be provided with a rotating wheel on the rotating sleeve, so as to meet different use scenarios, and the appearance of the mounting seat also looks more coordinated and beautiful; the rotating wheel is driven to rotate by pulling down or rising the pull rope, and the pull rope is pulled smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the pull rod mechanism of the pull rod type roller blind of the utility model;

[0015] Figure 2 It is a cross-sectional view of the pull rod mechanism of the pull rod type roller blind of the utility model in a normal state;

[0016] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0017] Figure 4 for Figure 2 Enlarged view of middle part B;

[0018] Figure 5 It is a cross-sectional view of the pull rod mechanism of the pull rod type roller blind of the utility model when the outer rod is pulled down;

[0019] Figure 6 It is a structural schematic diagram of the pull rod mechanism of the pull rod type roller blind of the utility model when the outer rod is pulled down;

[0020] Figure 7 for Figure 6 Enlarged view of middle C;

[0021] Figure 8 It is a structural schematic diagram of the arc-shaped portion of the pull rod mechanism of the pull rod type roller blind of the utility model;

[0022] Fig. 9 It is a structural schematic diagram of a rotating disk of a pull rod mechanism of a pull rod type roller blind of the utility model;

[0023] The names of the components corresponding to the various figure marks in the figure are: 1 is a mounting seat, 101 is an arcuate groove, 102 is a first clamping groove, 2 is a pull rod, 3 is a rolling roller, 4 is a pull rope, 41 is an external force downward pull section, 411 is a second limiting portion, 5 is an outer rod, 6 is an inner rod, 61 is an arcuate portion, 62 is an end cover, 621 is a second wire passing hole, 63 is a shock-absorbing soft sleeve, 7 is a connecting sleeve, 701 is a first wire passing hole, 71 is a first connecting portion, 72 is a second connecting portion, 8 is a rope body, 801 is a first limiting portion, 81 is a first rope body, 82 is a second rope body, 9 is an elastic member, 10 is a handle, 11 is a second clamping groove, 12 is a rotating disk, 121 is an annular groove, 122 is a third clamping groove, 13 is a coil spring, 14 is a guide column, and 15 is a rotating wheel. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is in normal use.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0027] See also Figure 1-Figure 9 The utility model provides a pull rod mechanism of a pull rod type roller blind, comprising: a mounting seat 1 and a pull rod 2, a pull rope 4 for driving a roller blind cylinder 3 to rotate in a circumferential direction is arranged on the mounting seat 1, one end of the pull rope 4 is an external force pull-down end 41, the pull rod 2 comprises an outer rod 5 and an inner rod 6 which is slidably sleeved on the outer rod 5 along the axial direction, the external force pull-down end 41 is connected to the outer rod 5, a connecting sleeve 7 is arranged inside the inner rod 6, a first wire hole 701 corresponding to the pull rope 4 is formed on the inner side of the connecting sleeve 7, and the pull rope 4 passes through the first wire hole 701; a rope body 8 is connected between the connecting sleeve 7 and the mounting seat 1, and the lower end of the rope body 8 passes through the connecting sleeve in the vertical direction. 7 and limit the position by tying a knot at the lower end of the rope body 8, and the lower end of the rope body 8 can also be fixed to the connecting sleeve 7 by gluing or other methods; an elastic member 9 is provided between the inner rod 6 and the connecting sleeve 7, and the elastic force of the elastic member 9 is used to make the upper end of the inner rod 6 abut against the mounting seat 1; the pull rod mechanism of the pull rod type roller blind of the utility model comprises an inner rod and an outer rod, and the roller blind cloth is driven up by pulling down the outer rod, and the inner rod part of the pull rod always abuts against the mounting seat, so as to avoid the danger of the pull cord being exposed, and the use is safe and reliable; at the same time, it can also prevent the pull cord from being exposed and contaminated with dust and other impurities, keep the pull cord relatively clean, and ensure that the pull cord is pulled smoothly.

[0028] See also Figure 2 , Figure 3 , Figure 7 and Figure 8 A universal connection part is arranged between the upper end of the inner rod 6 and the mounting seat 1, and the universal connection part includes an arc-shaped part 61 arranged on the upper end of the inner rod 6 and an arc-shaped groove 101 arranged on the mounting seat 1, and the arc-shaped part 61 corresponds to the arc-shaped groove 101, so that the user can pull down the outer rod at different angles according to the needs, satisfying the use scenario of the user's inclined pull-down, and is easy to use; an end cover 62 is fixedly arranged on the upper end of the inner rod 6, and the inner rod 6 includes an end cover 62, one end of the elastic member 9 is against the bottom of the end cover 62, and the other end of the elastic member 9 is against the upper side of the connecting sleeve 7, and the end cover 62 is provided with a second wire-passing hole 621 for passing the pull rope 4 and the rope body 8, and the structural design is reasonable; the end cover 62 is ultrasonically welded and fixed to the upper end of the inner rod 6, the end cover 62 is not easy to disengage, and the structure is stable and reliable; the elastic member 9 is a compression spring, and the pull rope 4 and the rope body 8 both pass through the inner diameter hole of the elastic member 9, and the structure is compact.

[0029] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 A first limiting portion 801 is provided on the upper part of the rope body 8, and the first limiting portion 801 can be a knot on the rope body 8; a first clamping groove 102 for engaging and limiting with the first limiting portion 801 is provided on the mounting seat 1, which is convenient for engagement and assembly, and two first clamping grooves 102 are symmetrically provided on the mounting seat 1; the rope body 8 includes a first rope body 81 and a second rope body 82, a first connecting portion 71 is formed between the lower part of the first rope body 81 and the connecting sleeve 7, and a second connecting portion 72 is formed between the lower part of the second rope body 82 and the connecting sleeve 7, and the first connecting portion 71 and the second connecting portion 72 are symmetrically distributed on the connecting sleeve 7, so that the upward pulling force of the two rope bodies on the connecting sleeve 7 is balanced, thereby avoiding uneven force on the connecting sleeve 7 The problem of tilting and jamming occurs during balance, and the use is reliable; a shock-absorbing soft sleeve 63 is provided on the outer wall of the upper end of the inner rod 6. In normal state, the upper end of the outer rod 5 abuts against the lower side of the shock-absorbing soft sleeve 63. After the outer rod is pulled down and released, the outer rod is reset upward. The setting of the shock-absorbing soft sleeve 63 can prevent the upper end of the outer rod from directly hitting the mounting seat to cause structural damage, thereby extending the service life; a handle 10 is fixedly provided at the bottom of the outer rod 5. The outer rod 5 includes the handle 10, which is convenient for the user to hold when pulling down, and the pulling down feels comfortable; the external force pulling-down end 41 is provided with a second limiting portion 411, and the second limiting portion 411 can be a rope knot; a second card slot 11 for limiting the second limiting portion 411 is provided on the handle 10, so that the outer rod 5 can drive the pull rope to pull down.

[0030] See also Figure 2 , Figure 3 , Figure 6 and Fig. 9, a rotating disk 12 and a coil spring 13 for driving the rotating disk 12 to reverse and reset are provided on the mounting seat 1. When the outer rod is pulled down, the coil spring 13 is rolled up to store elastic potential energy; after the outer rod is released, the coil spring 13 releases the elastic potential energy and drives the rotating disk 12 to reverse and reset. This is the prior art and will not be described in detail here; the rotating disk 12 is connected to the rolling shutter drum 3 and rotates synchronously, and part of the pull rope 4 is wound in the annular groove 121 of the rotating disk 12, so that the pull rope can be pulled down to drive the rotating disk 12 to rotate; the pull rope 4 is away from One end of the external force pull-down end 41 is clamped in the third clamping groove 122 of the rotating disk 12, and two cylindrical guide pillars 14 are symmetrically arranged on the mounting seat 1. According to the different winding directions of the pull rope on the rotating disk 12, one of the guide pillars 14 can be selected to rotatably sleeve a rotating wheel 15 thereon to meet different usage scenarios. The appearance of the mounting seat also looks more coordinated and beautiful; the pull rope 4 is pressed against the rotating wheel 15, and the rotating wheel 15 is driven to rotate by pulling the pull rope 4 down or up, and the pull rope 4 is pulled smoothly.

[0031] The pull rod mechanism of the pull rod type roller blind of the utility model comprises an inner rod and an outer rod, and the roller blind cloth is driven to rise by pulling down the outer rod, and the inner rod part of the pull rod always abuts against the mounting seat, so that the pull rope is avoided from being exposed and dangerous, and the use is safe and reliable; a universal connection part is arranged between the upper end of the inner rod and the mounting seat, so that the user can pull down the outer rod at different angles according to the needs, and the use is convenient; a first clamping groove for engaging and limiting with the first limiting part is arranged on the mounting seat, and the clamping and assembly are convenient; the first connecting part and the second connecting part are symmetrically distributed on the connecting sleeve, so that the upward pulling force of the two rope bodies on the connecting sleeve is balanced, and the problem of tilting and stagnation caused by unbalanced force on the connecting sleeve is avoided, and the use is reliable; the shock-absorbing soft sleeve can prevent the upper end of the outer rod from directly hitting the mounting seat to cause structural damage, and prolong the service life; according to the different winding directions of the pull rope on the rotating disk, one of the guide pillars can be selected to be provided with a rotating wheel on the rotating sleeve, so as to meet different use scenarios, and the appearance of the mounting seat also looks more coordinated and beautiful; the rotating wheel is driven to rotate by pulling down or rising the pull rope, and the pull rope is pulled smoothly.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A pull rod mechanism for a pull rod type roller blind, characterized in that: include: A mounting seat (1) and a pull rod (2), wherein the mounting seat (1) is provided with a pull rope (4) for driving the roller shutter drum (3) to rotate in a circumferential direction, one end of the pull rope (4) is an external force pull-down end (41), the pull rod (2) comprises an outer rod (5) and an inner rod (6) slidably sleeved inside the outer rod (5), the external force pull-down end (41) is connected to the outer rod (5), a connecting sleeve (7) is provided inside the inner rod (6), a first wire hole (701) corresponding to the pull rope (4) is formed on the inner side of the connecting sleeve (7), a rope body (8) is connected between the connecting sleeve (7) and the mounting seat (1), an elastic member (9) is provided between the inner rod (6) and the connecting sleeve (7), and the upper end of the inner rod (6) is pressed against the mounting seat (1) by the elastic force of the elastic member (9).

2. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: A universal connection portion is provided between the upper end of the inner rod (6) and the mounting seat (1), the universal connection portion comprising an arc-shaped portion (61) provided at the upper end of the inner rod (6) and an arc-shaped groove (101) provided on the mounting seat (1), the arc-shaped portion (61) corresponding to the arc-shaped groove (101).

3. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: An end cover (62) is fixedly provided on the upper end of the inner rod (6), one end of the elastic member (9) abuts against the bottom of the end cover (62), and the other end of the elastic member (9) abuts against the upper side of the connecting sleeve (7), and a second wire passing hole (621) for passing the pull rope (4) and the rope body (8) is provided on the end cover (62).

4. The pull rod mechanism of the pull rod type roller blind according to claim 3, characterized in that: The end cover (62) is fixed to the upper end of the inner rod (6) by ultrasonic welding.

5. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: The elastic member (9) is a compression spring, and the pull rope (4) and the rope body (8) both pass through the inner diameter hole of the elastic member (9).

6. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: The upper part of the rope body (8) is provided with a first limiting portion (801), and the mounting seat (1) is provided with a first locking groove (102) for locking with the first limiting portion (801) for limiting.

7. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: The rope body (8) comprises a first rope body (81) and a second rope body (82); a first connecting portion (71) is formed between the lower portion of the first rope body (81) and the connecting sleeve (7); a second connecting portion (72) is formed between the lower portion of the second rope body (82) and the connecting sleeve (7); the first connecting portion (71) and the second connecting portion (72) are symmetrically distributed on the connecting sleeve (7).

8. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: The outer wall of the upper end of the inner rod (6) is provided with a shock-absorbing soft sleeve (63), and in a normal state, the upper end of the outer rod (5) abuts against the lower side of the shock-absorbing soft sleeve (63).

9. The pull rod mechanism of the pull rod type roller blind according to claim 1, characterized in that: A handle (10) is fixedly provided at the bottom of the outer rod (5), a second limiting portion (411) is provided at the external force pull-down end (41), and a second clamping groove (11) for limiting the second limiting portion (411) is provided on the handle (10).

10. The pull rod mechanism of the pull rod type roller blind according to any one of claims 1 to 9, characterized in that: The mounting seat (1) is provided with a rotating disk (12) and a coil spring (13) for driving the rotating disk (12) to reverse and reset. The rotating disk (12) is connected to the rolling shutter drum (3) and rotates synchronously. The pull rope (4) is wound in the annular groove (121) of the rotating disk (12). The end of the pull rope (4) away from the external force downward pull end (41) is clamped in the third clamping groove (122) of the rotating disk (12). Two guide columns (14) are symmetrically arranged on the mounting seat (1), and a rotating wheel (15) is rotatably sleeved on one of the guide columns (14). The pull rope (4) is pressed against the rotating wheel (15), and the rotating wheel (15) is driven to rotate by the pull rope (4).

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