A spring drive system for a cordless roller shade

Abstract

The present application relates to the technical field of mechanical transmission, in particular to a spring driving system for a cordless soft screen. The spring driving system comprises a first spring joint, a transmission intermediate pipe, a main spring and a retarder, the main spring is sleeved on the transmission intermediate pipe, the first spring joint is sleeved on one end of the transmission intermediate pipe, the first spring joint is connected with the transmission intermediate pipe through a pin, the retarder is sleeved on the other end of the transmission intermediate pipe, and the main spring is connected with the first spring joint and the retarder respectively. The spring driving system for the cordless soft screen has the advantages of reducing safety risks, reducing the length of the spring and low failure rate, the retarder is used to replace the pull bead structure, the safety risks are reduced by avoiding the pull bead from being eaten by children, the speed reduction and torque increasing function of the retarder is used, the spring can be pre-tightened by using a larger and shorter spring, and the lengthened spring is not needed, the problems of safety risks, long spring and high failure rate existing in the existing spring driving system are solved, and the use needs of the soft screen are met.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical transmission, and in particular to a spring drive system for a cordless soft gauze curtain. Background Art

[0002] Soft gauze curtains, commonly referred to as zebra shades, are double-layered roll-up blinds with dimming capabilities. The fabric of these curtains consists of a semi-transparent strip and a light-blocking strip. These strips are of equal width and staggered. When the two layers overlap completely, they provide partial light blocking. When they are completely staggered, they provide full light blocking. Therefore, simply fix one end of the curtain and mount the other end on a roller to roll it. This allows you to control the overlap of the two layers and achieve dimming. To control the rotation of the roller, a suitable drive system is required.

[0003] Existing soft gauze curtains usually use a bead-type rope drive system, which uses the engagement of beads with mechanical components to drive the roller tube to rotate. However, the beads are easy to loosen and fall off, posing a safety risk of accidental ingestion by children. Therefore, a new spring drive system is used as an alternative.

[0004] Furthermore, the principle of soft gauze curtains is to use their own misalignment to adjust the light blocking, so the fabric length is twice that of ordinary roller blinds, forming a double-layer structure. To preload longer soft gauze curtains, the existing spring drive system needs to use longer springs and increase the number of spring coils to ensure preload force. The soft gauze curtains are also equipped with a lower beam counterweight to increase flatness, which places higher requirements on the spring preload force and further increases the expected spring length. Excessively long springs are not only difficult to install and debug, but also prone to damage and high failure rate. Therefore, a new spring drive system is needed to address these shortcomings. Summary of the Invention

[0005] In order to overcome the technical defects of the above-mentioned existing spring drive system, such as safety risks, excessively long springs and high failure rates, the present invention provides a spring drive system for cordless soft gauze curtains that reduces safety risks, shortens spring length and has a low failure rate.

[0006] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0007] The spring drive system for a cordless soft gauze curtain described in the present invention includes a first spring joint, a transmission intermediate tube, a main spring and a retarder, and is characterized in that: the main spring is mounted on the transmission intermediate tube, one end of the transmission intermediate tube is mounted with the first spring joint, the first spring joint is connected to the transmission intermediate tube through a pin, the other end of the transmission intermediate tube is mounted with the retarder, and the main spring is respectively connected to the first spring joint and the retarder.

[0008] The transmission intermediate pipe is symmetrically provided with limiting grooves.

[0009] A first limiting flange is symmetrically arranged inside the port of the first spring joint.

[0010] The retarder is composed of a second spring joint, a first retarding module, a second retarding module and a driving wheel. The driving wheel is mounted on the second spring joint. The first retarding module and the second retarding module are installed between the driving wheel and the second spring joint. The second spring joint, the first retarding module, the second retarding module and the driving wheel are engaged and connected in sequence.

[0011] The second spring joint is symmetrically provided with a spring bayonet, an oil groove hole is provided in the second spring joint, the end surface of the second spring joint is symmetrically provided with a first connecting flange, and a gear mounting hole is provided on the second spring joint between the first connecting flanges.

[0012] The first deceleration module is composed of a fixed cover, a first central gear, a first planetary gear and a first planetary gear cover. The first planetary gear cover is installed on the fixed cover. At least one first planetary gear is installed between the first planetary gear cover and the fixed cover. The at least one first planetary gear is arranged in a centrally symmetrical manner. The first central gear is installed in the first planetary gear cover between the first planetary gears.

[0013] Step grooves are arranged at intervals on the fixing cover, and connection holes are evenly distributed on the end surface of the fixing cover.

[0014] A second limiting flange is symmetrically provided on the inner side of the first central gear.

[0015] The second deceleration module is composed of a gear sleeve, a second sun gear, a second planetary gear and a second planetary gear cover. The second planetary gear cover is installed on the gear sleeve. At least one second planetary gear is installed between the second planetary gear cover and the gear sleeve. The at least one second planetary gear is arranged in a centrally symmetrical manner. The second sun gear is installed in the second planetary gear cover between the second planetary gears.

[0016] The gear sleeve is provided with second connecting flanges in a quadrilateral symmetrical shape.

[0017] The driving wheel is provided with an oil tank center hole, the inner side of the driving wheel is evenly provided with transmission teeth, at least one rib is provided at intervals on the driving wheel, and buckles and connecting column heads are provided at intervals on the end of the driving wheel.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The spring drive system for cordless soft gauze curtains described in the present invention has the advantages of reduced safety risks, reduced spring length and low failure rate. The transmission structure of the first spring joint, the transmission intermediate tube, the main spring and the retarder replaces the commonly used bead structure, which prevents children from accidentally swallowing the detached beads, greatly reducing the safety risks of the existing soft gauze curtain drive system; the deceleration and torque increase function of the retarder is realized by the second spring joint, the first retarder module, the second retarder module and the drive wheel, so the purpose of pre-tightening can be achieved by using a larger and shorter spring, and there is no need to use an extended spring; in addition, the present application has a compact structure and reliable component transmission logic. It uses a larger and shorter spring to replace a long spring, which is not easy to be damaged, reduces the failure rate, solves the problems of safety risks, excessive spring length and high failure rate in the existing spring drive system, and meets the use needs of soft gauze curtains. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 is a schematic diagram of the three-dimensional structure of the first spring joint of the present invention;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the transmission intermediate pipe of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the retarder of the present invention;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the second spring connector of the present invention;

[0026] Figure 6 This is a second schematic diagram of the three-dimensional structure of the second spring connector of the present invention;

[0027] Figure 7 Schematic diagram of the explosion structure of the first retarding module of the present invention;

[0028] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixed cover of the present invention;

[0029] Figure 9 is a schematic diagram of the three-dimensional structure of the first central gear of the present invention;

[0030] Figure 10 Schematic diagram of the explosion structure of the second deceleration module of the present invention;

[0031] Figure 11 This is a schematic diagram of the three-dimensional structure of the driving wheel of the present invention;

[0032] Figure 12 This is the second schematic diagram of the three-dimensional structure of the driving wheel of the present invention.

[0033] In the picture:

[0034] 1. First spring joint; 101. First limiting flange; 102. Pin;

[0035] 2. Transmission intermediate pipe; 201. Limiting groove;

[0036] 3. Main spring;

[0037] 4. Retarder; 401. Second spring connector; 4011. Spring bayonet; 4012. Oil tank hole; 4013. First connecting flange; 4014. Gear mounting hole;

[0038] 402, first retarding module; 4021, fixing cover; 4022, first sun gear; 4023, first planetary gear; 4024, first planetary gear cover; 4025, stepped groove; 4026, connecting hole; 4027, second limiting flange;

[0039] 403, second retarder module; 4031, gear sleeve; 4032, second sun gear; 4033, second planetary gear; 4034, second planetary gear cover; 4035, second connecting flange;

[0040] 404, driving wheel; 4041, center hole of oil tank; 4042, transmission gear; 4043, rib; 4044, buckle; 4045, connecting column head. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0042] like Figures 1-12 As shown, the spring drive system for a cordless soft gauze curtain described in the present invention includes a first spring joint 1, a transmission intermediate tube 2, a main spring 3 and a retarder 4. The transmission intermediate tube 2 is cylindrical, and a limiting groove 201 is symmetrically provided on the transmission intermediate tube 2. The main spring 3 is mounted on the transmission intermediate tube 2. One end of the transmission intermediate tube 2 is mounted with a first spring joint 1, and a first limiting flange 101 is symmetrically provided in the port of the first spring joint 1. The first limiting flange 101 is used to cooperate with the limiting groove 201 to limit the transmission intermediate tube 2 so that the transmission intermediate tube 2 cannot rotate. The first spring joint 1 is connected to the transmission intermediate tube 2 by a pin 102 so that the transmission intermediate tube 2 cannot be detached from the first spring joint 1.

[0043] The other end of the transmission intermediate tube 2 is fitted with a retarder 4, with the main spring 3 connected to the first spring joint 1 and retarder 4, respectively. The retarder 4 comprises a second spring joint 401, a first retarder module 402, a second retarder module 403, and a drive wheel 404. The second spring joint 401 is symmetrically provided with spring bayonet holes 4011, and the first spring joint 1 is provided with the same spring bayonet holes 4011 for mounting and connecting the main spring 3. An oil trough hole 4012 is provided within the second spring joint 401 for draining lubricating oil. First connecting flanges 4013 are symmetrically provided on the end surface of the second spring joint 401, and a gear mounting hole 4014 is provided on the second spring joint 401 between the first connecting flanges 4013.

[0044] The second spring joint 401 is provided with a driving wheel 404, which is used to connect the load for transmission, and then transmit it to the main spring 3 through the retarder 4 to realize the pre-tightening function. The driving wheel 404 is provided with an oil tank center hole 4041 for discharging lubricating oil, and the inner side of the driving wheel 404 is evenly provided with transmission teeth 4042. At least one rib 4043 is provided on the driving wheel 404 at intervals. This application is usually used in conjunction with the winding tube system of the soft gauze curtain. The rib 4043 is used to install the winding tube and interference fit to enhance stability; buckles 4044 and connecting column heads 4045 are provided at intervals on the port of the driving wheel 404, and a first retarder module 402 and a second retarder module 403 are installed between the driving wheel 404 and the second spring joint 401. The second spring joint 401, the first retarder module 402, the second retarder module 403 and the driving wheel 404 are snap-connected in sequence.

[0045] The first deceleration module 402 is composed of a fixed cover 4021, a first central gear 4022, a first planetary gear 4023 and a first planetary gear cover 4024. The fixed cover 4021 is provided with stepped grooves 4025 at intervals, and the stepped grooves 4025 are used to engage with the buckles 4044 of the drive wheel 404 for engagement. The end surface of the fixed cover 4021 is evenly provided with connecting holes 4026, and the connecting holes 4026 are used to engage with the connecting studs 4045 of the drive wheel 404 for installation. The first planetary gear cover 4024 is installed on the fixed cover 4021. The first planetary gear cover 4024 is installed on the fixed cover 4021. At least one first planetary gear 4023 is installed between 024 and the fixed cover 4021. The at least one first planetary gear 4023 is arranged in a centrally symmetrical manner. The first planetary gears 4023 are installed on the gear mounting hole 4014. The first center gear 4022 is installed in the first planetary gear cover 4024 between the first planetary gears 4023. The inner side of the first center gear 4022 is symmetrically provided with a second limiting flange 4027. The second limiting flange 4027 is used to cooperate with the limiting groove 201 for limiting, so that the first center gear 4022 and the transmission intermediate pipe 2 cannot rotate relative to each other.

[0046] The second deceleration module 403 is composed of a gear sleeve 4031, a second central gear 4032, a second planetary gear 4033 and a second planetary gear cover 4034. The gear sleeve 4031 is provided with a second connecting flange 4035 in a four-corner symmetrical shape, and the gear sleeve 4031 is provided with a second planetary gear cover 4034. At least one second planetary gear 4033 is installed between the second planetary gear cover 4034 and the gear sleeve 4031. The at least one second planetary gear 4033 is arranged in a centrally symmetrical manner, and a second central gear 4032 is installed in the second planetary gear cover 4034 between the second planetary gears 4033.

[0047] The spring drive system for cordless gauze curtains has the advantages of reduced safety risks, reduced spring length and low failure rate. The transmission structure of the first spring joint 1, the transmission intermediate tube 2, the main spring 3 and the retarder 4 replaces the commonly used bead structure, which prevents children from accidentally swallowing the detached beads, greatly reducing the safety risks of the existing gauze curtain drive system; the deceleration and torque increase function of the retarder 4 is realized by the second spring joint 401, the first retarder module 402, the second retarder module 403 and the drive wheel 404, so the purpose of pre-tightening can be achieved by using a larger and shorter spring, and there is no need to use an extended spring; in addition, the present application has a compact structure and reliable component transmission logic. It uses a larger and shorter spring to replace a long spring, which is not easy to be damaged, reduces the failure rate, solves the problems of safety risks, excessive spring length and high failure rate in the existing spring drive system, and meets the use needs of the gauze curtain.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A spring drive system for a cordless soft gauze curtain, comprising a first spring joint (1), a transmission intermediate tube (2), a main spring (3) and a retarder (4), characterized in that: A main spring (3) is mounted on the transmission intermediate tube (2), a first spring joint (1) is mounted on one end of the transmission intermediate tube (2), the first spring joint (1) is connected to the transmission intermediate tube (2) via a pin (102), a retarder (4) is mounted on the other end of the transmission intermediate tube (2), the main spring (3) is connected to the first spring joint (1) and the retarder (4) respectively; the retarder (4) is composed of a second spring joint (401), a first retarding module (402), a second retarding module (403) and a driving wheel (404), the driving wheel (404) is mounted on the second spring joint (401), and a retarder (404) is mounted between the driving wheel (404) and the second spring joint (401). The invention is provided with a first deceleration module (402) and a second deceleration module (403), and a second spring joint (401), the first deceleration module (402), the second deceleration module (403) and the driving wheel (404) are sequentially engaged and connected; the second spring joint (401) is symmetrically provided with a spring bayonet (4011), the second spring joint (401) is provided with an oil tank hole (4012), the end surface of the second spring joint (401) is symmetrically provided with a first connecting flange (4013), and the second spring joint (401) between the first connecting flanges (4013) is provided with a gear mounting hole; the first deceleration module (402) is connected to the first deceleration module (402) by a fixing cover (4021) ), a first central gear (4022), a first planetary gear (4023) and a first planetary gear cover (4024); the first planetary gear cover (4024) is mounted on the fixed cover (4021); four first planetary gears (4023) are mounted between the first planetary gear cover (4024) and the fixed cover (4021); the four first planetary gears (4023) are centrally symmetrically arranged; the first central gear (4022) is mounted in the first planetary gear cover (4024) between the first planetary gears (4023); the fixed cover (4021) is provided with stepped grooves (4025) at intervals; and the end surface of the fixed cover (4021) is evenly provided with connecting holes (4026) The second deceleration module (403) is composed of a gear sleeve (4031), a second central gear (4032), a second planetary gear (4033) and a second planetary gear cover (4034). The gear sleeve (4031) is provided with a second planetary gear cover (4034). Four second planetary gears (4033) are provided between the second planetary gear cover (4034) and the gear sleeve (4031). The four second planetary gears (4033) are arranged in a centrally symmetrical manner. The second central gear (4032) is installed in the second planetary gear cover (4034) between the second planetary gears (4033). The gear sleeve (4031) is provided with a second connecting flange (4035) in a quadrilaterally symmetrical manner.

2. The spring drive system for a cordless soft gauze curtain according to claim 1, characterized in that: The transmission intermediate tube (2) is symmetrically provided with limiting grooves (201).

3. The spring drive system for a cordless soft gauze curtain according to claim 1, characterized in that: A first limiting flange is symmetrically arranged in the port of the first spring joint (1).

4. The spring drive system for a cordless soft gauze curtain according to claim 1, characterized in that: An oil tank center hole (4041) is provided in the driving wheel (404), transmission teeth (4042) are evenly distributed on the inner side of the driving wheel (404), at least one rib (4043) is provided at intervals on the driving wheel (404), and buckles (4044) and connecting studs (4045) are provided at intervals on the end of the driving wheel (404).

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