A reset device, roller assembly and roller shutter

Abstract

The utility model discloses a reset device, including the main body, be provided with elastic member in the main body, the main body includes the casing and the movable setting axle block of casing center, elastic member one end is fixed on axle block, and the other end is fixed to casing, when the relative movement between casing and axle block, make elastic member tighten or relax. Under the premise of guaranteeing original function, replace the torsional spring structure of original with the modular assembly of coil spring reset device, wherein the direction of coil spring reset device does not need to adjust, saves manufacturing cost, under this premise, can adopt both sides to install coil spring reset component, avoids the situation of uneven cloth winding.

Description

Technical Field

[0001] This utility model relates to the field of roller blinds, and in particular to a reset device, roller assembly and roller blind. Background Technology

[0002] A traditional roller blind is a product installed inside a door, window, or frame for sun shading and light control.

[0003] A curtain is wound on the roller of a roller blind. By pulling the curtain, the curtain on the roller is pulled out. In order to ensure that the curtain can be rewound onto the roller, a reset device is set on the roller. Traditionally, a torsion spring is used to achieve this function on roller blinds. However, if torsion springs are set on both sides of the roller, two torsion springs in different directions need to be installed, which will increase the cost. Therefore, a torsion spring is installed on only one side of the roller.

[0004] Installing a torsion spring on only one side will result in inconsistent torque on both sides of the roller. When the roller is long, the length of the fabric wound on both ends of the roller will be inconsistent. Utility Model Content

[0005] Based on this, this application provides a reset device, a roller assembly, and a roller shutter to solve the above-mentioned technical problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a reset device, including a main body, wherein an elastic element is provided inside the main body; the main body includes a housing and a shaft block movably disposed at the center of the housing; one end of the elastic element is fixed to the shaft block, and the other end is fixed to the housing; when the housing and the shaft block move relative to each other, the elastic element is tightened or relaxed.

[0007] In the above technical solution, the housing is further composed of a main shell and a secondary shell, and fasteners are provided to fix the secondary shell to the main shell. The main shell has a cavity for accommodating the elastic element. The shaft block is composed of a central shaft and side shafts located on both sides of the central shaft. The main shell and the secondary shell are provided with recessed areas for accommodating the side shafts. The side shaft is composed of a first side shaft and a second side shaft. The recessed areas include a first recessed area and a second recessed area that correspond to the first side shaft and the second side shaft and have different diameters.

[0008] In the above technical solution, a polygonal hole is provided to penetrate the shaft block in the axial direction; a through layer is provided at the edge of the central shaft to cut it off, one end of the elastic member is placed in the through layer and wound around the central shaft; it also includes a fixing block provided on the main shell, and the end of the elastic member wound around multiple times is fixed to the fixing block.

[0009] In the above technical solution, the main shell and the sub-shell are further provided with corresponding fastening structures, including a notch on the cover surface of the main shell and a protrusion on the cover surface of the sub-shell; the notch on the main shell of the other main body is embedded into the protrusion on the sub-shell.

[0010] In the above technical solution, a slot and several rib grooves are provided at corresponding positions on the main shell and the sub-shell; guide edges are provided on the slot and the rib grooves.

[0011] In the above technical solution, the cover surfaces of the main shell and the secondary shell are further provided with guide marks facing the same direction.

[0012] A roller assembly, including the aforementioned reset device, further includes: a bearing seat, comprising a shaft body and a shaft tail, with a through hole at the center; a torsion shaft, including a main shaft and a secondary shaft located on the main shaft, the bearing seat being mounted on the secondary shaft, and the main body being mounted on the main shaft; a locking device being provided between the bearing seat and the torsion shaft for controlling the linkage state between the bearing seat and the torsion shaft; and a roller, with torsion shafts bearing the bearing seats mounted on both sides of the roller, and rotating synchronously with the bearing seats and the reset device.

[0013] In the above technical solution, at least one protrusion is provided on the shaft body and abuts against the main body. The first protrusion and the second protrusion are respectively provided on the shaft seats on both sides of the roller. The torsion shaft passes through the center of the shaft block, and the main shell side of the main body placed on the torsion shaft is close to the shaft seat. When the edge of the first protrusion is provided with a protrusion corresponding to the notch on the main shell, the edge of the second protrusion is provided with a notch corresponding to the protrusion on the sub-shell. Otherwise, the first protrusion is provided with a notch and the second protrusion is provided with a protrusion.

[0014] In the above technical solution, the locking device further includes a locking block disposed at one end of the secondary shaft in the length direction; a locking block disposed at the tail of the shaft, the locking block being movably disposed on the tail of the shaft; the locking block being provided with at least one slot that cooperates with the locking block; the tail of the shaft being provided with a convex round block that restricts the locking block from moving closer to the slot; the locking block being embedded in the slot, with a first direction being a locked state and a second direction being an unlocked state.

[0015] In the above technical solution, the inner wall of the roller is further provided with an arc-shaped groove and reinforcing ribs that cooperate with the slot and the rib groove.

[0016] In the above technical solution, a limiting washer is provided at one end of the torsion shaft near the reset device to restrict the reset device from disengaging from the torsion shaft, and a fastener is provided to fix it on the torsion shaft.

[0017] A roller blind includes the roller assembly and a housing for mounting the roller assembly. Roller seats are provided on both sides inside the housing. The torsion shaft on the roller assembly is embedded in the roller seat. One end of the curtain fabric is embedded in the arc-shaped groove of the roller and wound around the roller.

[0018] The beneficial effects of this utility model are: under the premise of ensuring the original function, the original torsion spring structure is replaced with a modularly assembled coil spring reset device, wherein the direction of the coil spring reset device does not need to be adjusted, saving manufacturing costs. Under this premise, coil spring reset components can be installed on both sides to avoid uneven fabric rolling. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional view of the roller shutter of this utility model.

[0021] Figure 2 This is an exploded view of the roller shutter of this utility model.

[0022] Figure 3 This is a perspective view of the roller assembly of this utility model.

[0023] Figure 4 This is an anatomical diagram of the roller assembly of this utility model.

[0024] Figure 5 This is an exploded view of the roller assembly of this utility model.

[0025] Figure 6 This is a schematic diagram of the unlocked state of the locking device on the shaft seat of this utility model.

[0026] Figure 7 This is a schematic diagram of the locking device on the bearing of this utility model in the locked state.

[0027] Figure 8 This is an exploded view of the reset device of this utility model.

[0028] Figure 9 This is a front view of the shaft block of this utility model.

[0029] In the diagram, 1. Main body, 2. Elastic element, 3. Shell, 31. Main shell, 32. Subshell, 4. Shaft block, 41. Central shaft, 411. Through layer, 42. Side shaft, 421. First side shaft, 422. Second side shaft, 5. Recessed area, 51. First recessed area, 52. Second recessed area, 6. Notch, 7. Protrusion, 8. Slot, 9. Rib groove, 10. Guide edge, 11. Guide mark, 12. Shaft seat. 121. Shaft body, 1211. Protrusion, 122. Shaft tail, 13. Torsion shaft, 131. Main shaft, 132. Sub-shaft, 14. Locking device, 141. Locking block, 1411. Slot, 142. Slot block, 143. Convex round block, 15. Roller, 151. Arc groove, 152. Reinforcing rib, 16. Limiting gasket, 17. Roller shutter, 171. Housing, 1711. Roller seat, 172. Curtain. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0031] Reference Figure 8-9 As shown, a reset device includes a main body 1, and an elastic element 2 is disposed inside the main body 1; the main body 1 includes a housing 3 and a shaft block 4 movably disposed at the center of the housing 3; one end of the elastic element 2 is fixed to the shaft block 4, and the other end is fixed to the housing 3; when the housing and the shaft block 4 move relative to each other, the elastic element 2 is tightened or relaxed.

[0032] The housing 3 is formed by the combination of a main housing 31 and a secondary housing 32. The main housing 31 has a cavity for accommodating the elastic element 2. Specifically, the cavity is circular. The elastic element 2 is a coil spring. The inner end of the coiled elastic element 2 is fixed to the shaft block 4. The inner end of the coiled elastic element 2 is a rigid folded edge. To fix it, the shaft block 4 is composed of a central shaft 41 and side shafts 42 located on both sides of the central shaft 41. The whole is in the shape of an "I". The elastic element 2 is placed on the central shaft 41. The shaft block 4 is rotatably mounted on the housing 3. The inner wall surfaces of the main housing 31 and the secondary housing 32 are provided with recessed areas 5 for accommodating the side shafts 42. After the main housing 31 and the secondary housing 32 are combined and connected by fasteners, the shaft block 4 placed in the cavity of the main housing 31 is axially restricted.

[0033] Specifically, the side shaft 42 is composed of a first side shaft 421 and a second side shaft 422. The recessed area 5 includes a first recessed area 51 and a second recessed area 52. The diameter of the first side shaft 421 is larger than the diameter of the second side shaft 422, thus forming a stepped shape. The first recessed area 51 and the second recessed area 52, which match the first side shaft 421 and the second side shaft 422, are provided on the main shell 31 and the sub-shell 32. The second recessed area 52 is through. Similarly, the first recessed area 51 and the second recessed area 52 are also stepped to match the steps of the first side shaft 421 and the second side shaft 422.

[0034] To control the rotation of the main body 1, a polygonal shaft hole is provided at the center of the shaft block 4, the shaft hole passing through the central shaft 41 and the side shaft 42, as shown below. Figure 9 As described above, a through layer 411 is provided at the edge of the central shaft 41 without interfering with the shaft hole, which cuts off the edge of the central shaft 41. The inner winding end of the elastic member 2 is inserted into the through layer 411 and is wound along the central shaft 41. A fixing block is provided at the edge of the main shell 31 of the main body 1 to fix the outer winding end of the elastic member 2. The outer winding end is hooked on the fixing block and fastened into the through layer 411.

[0035] The reset device can be modularly assembled. In order to assemble multiple sets of the reset device, specifically, corresponding fastening structures are provided on the main shell 31 and the sub-shell 32. The main shell 31 on the first main body 1 is attached to the sub-shell 32 on the adjacent main body 1 to form a fastening state.

[0036] The fastening structure includes a notch 6 on the outside of the main shell 31 and a protrusion 7 on the outside of the sub-shell 32. The number of notches 6 and protrusions 7 is not fixed, but it is necessary to ensure that the notches 6 and protrusions 7 on the main shell 31 and the sub-shell 32 are in corresponding positions and in corresponding numbers.

[0037] In order to control the synchronous rotation of the multiple sets of resetting devices after splicing, a slot 14118 is provided at the corresponding position on the main shell 31 and the sub-shell 32. To facilitate entry into the slot 14118, a guide edge 10 is provided on the entry side of the main shell 31 and the sub-shell 32. Similarly, in order to enhance the overall strength of the main body 1, several sets of rib grooves 9 are provided at the corresponding position on the main shell 31 and the sub-shell 32. Similarly, a guide edge 10 is provided on the entry side of the rib groove 9.

[0038] Furthermore, to facilitate the installation process and help the user know the direction of the resetting device's twisting, guide markings 11 in the same direction are provided on both the main shell 31 and the sub-shell 32.

[0039] like Figure 3-7 As shown, a roller assembly includes the reset device, and further includes: a bearing seat 12, which is composed of a shaft body 121 and a shaft tail 122, with a through hole in the center; a torsion shaft 13, which includes a main shaft 131 and a secondary shaft 132 located on the main shaft 131, the bearing seat 12 being mounted on the secondary shaft 132, and the main body 1 being mounted on the main shaft 131; a locking device 14 is provided between the bearing seat 12 and the torsion shaft 13 to control the linkage state between the bearing seat 12 and the torsion shaft 13; and a roller 15, on both sides of which the torsion shaft 13 with the bearing seat 12 is respectively mounted, and rotates synchronously with the bearing seat 12 and the reset device.

[0040] To ensure that the reset device can rotate synchronously with the roller 15, an arc-shaped groove 151 matching the slot 14118 is provided on the surface of the roller 15. The inwardly recessed shape of the arc-shaped groove 151 can be inserted into the slot 14118. At the same time, a number of reinforcing ribs 152 corresponding to and cooperating with the rib groove 9 are provided on the inner wall of the roller 15.

[0041] The reset devices installed on both sides of the roller 15 rotate in the same direction. Therefore, when the main shell 31 on one side of the main body 1 engages with the bearing seat 12, the secondary shell 32 on the other side of the main body 1 engages with the bearing seat 12. However, due to the notch 6 and protrusion 7, the bearing seats 12 on both sides are respectively provided with a protrusion 7 that engages with the notch 6 and a groove that engages with the protrusion 7. Specifically, the shaft body 121 is provided with at least one protrusion 1211 that abuts against the main body 1. The notch 6 or protrusion 7 is provided on the protrusion 1211 and corresponds to and matches the protrusion 7 or notch 6 on the bearing seat 12 on the corresponding side.

[0042] During installation, the torsion shaft 13 on the roller assembly is fixed, and the roller 15 can rotate on the torsion shaft 13. In order to ensure that the roller assembly has a winding force in the initial state, the reset device needs to store force in the initial state. Therefore, a locking device 14 is provided between the bearing seat 12 and the torsion shaft 13 to control the linkage state between the bearing seat 12 and the torsion shaft 13. The roller assembly is locked after being pre-tightened.

[0043] The center of the bearing seat 12 is configured as a through hole. One end of the secondary shaft 132 is located at the end of the shaft tail 122. The locking device 14 includes a locking block 141 disposed at one end of the secondary shaft 132 in the longitudinal direction. The locking block 141 does not exceed the diameter range of the through hole on the bearing seat 12. The locking block 141 is exposed at the shaft tail 122. A cavity is provided at the shaft tail 122. The locking block 141 is located at the center of the cavity. A locking block is provided at the edge of the cavity. 142 The locking block 142 can rotate at the edge of the cavity. Specifically, the locking block 142 is an arc-shaped block with one end that can rotate. When the outer arc is against the cavity wall, it is in an unlocked state. When the locking block 142 cooperates with the locking block 141, it is in a locked state. Specifically, when the roller 15 rotates in the first direction, it is locked. When the roller 15 rotates in the second direction, although the locking block 142 and the locking block 141 are in a cooperative state, it is in an unlocked state.

[0044] like Figure 6-7As shown, specifically, at least one slot 14118 is provided on the locking block 141 to cooperate with the locking block 142. In order to facilitate the use of the secondary shaft 132 on both sides, the slot 14118 is symmetrical and consists of pointed slots on both sides and a concave support in the middle. The arc-shaped end of the locking block 142 away from the rotation point can be inserted into the pointed slot, and a convex arc block that can abut against the concave support is provided on the arc-shaped inner wall. When rotating in the first direction, the arc-shaped end of the locking block 142 disengages from the pointed slot, and the locking block 141 lifts the end of the locking block 142 and places it back at the edge of the concave cavity. When rotating in the second direction, the arc-shaped end of the locking block 142 is restricted in the pointed slot and cannot make the roller 15 rotate.

[0045] Furthermore, in order to restrict the locking block 142 from moving closer to the slot 14118, a convex round block 143 is provided at the edge of the bottom of the cavity. When the locking block 142 is lifted by the locking block 141, the locking block 142 passes through the convex round block 143. When the locking block 142 is no longer under the lifting force, it is restricted by the convex round block 143 and is restricted to the edge of the cavity, unable to rotate freely downwards.

[0046] It should be noted that, for example Figure 5 As shown, at one end of the torsion shaft 13 near the reset device, a limiting pad 16 is provided to restrict the reset device from disengaging from the torsion shaft 13, and a fastener is provided to fix it to the torsion shaft 13. This is to prevent the reset device from disengaging from the torsion shaft 13.

[0047] like Figure 1-2 As shown, a roller blind 17 includes the roller assembly described above, and also includes a housing 171 for mounting the roller assembly. Roller seats 1711 are provided on both sides inside the housing 171. The torsion shaft 13 on the roller assembly is embedded in the roller seat 1711. One end of the curtain fabric 172 is embedded in the arc-shaped groove 151 of the roller 15 and wound around the roller 15. This arrangement is to fix the torsion shaft 13 and control the rotation of the roller 15 by pulling the curtain fabric 172.

[0048] The working process of this utility model is as follows: The reset device is assembled, and it is necessary to ensure that the inner end of the elastic element 2 is inserted into the through layer 411 and wrapped around the central shaft 41. The outer end of the elastic element 2 is fixed to the fixing block by fasteners. Then, the main shell 31 and the secondary shell 32 are attached and fastened by fasteners. Several reset components are inserted into the torsion shaft 13 of the two roller assemblies, and it is necessary to ensure that the notch 6 and the protrusion 7 are aligned and fitted. The curtain 172 with the fabric tube is fastened into the arc groove 151 and the curtain 172 is wrapped around the roller 15. Then, the shaft seats 12 and the torsion shaft 13 on both sides are installed on the roller 5. In the initial state, the locking block 142 is restricted by the convex round block 143 and does not cooperate with the locking block 141. Then, the torsion shaft 13 is twisted in the opposite direction by one turn, so that the reset device has a reset force, and the locking block 142 is snapped into the locking block 141 to form a locked state. The two ends of the torsion shaft 13 are inserted into the roller seat 1711. By pulling down the curtain 172, the locking block 141 is rotated and the locking block 142 is lifted. The locking block 142 is restricted by the convex round block 143 and no longer cooperates with the locking block 141. The curtain 172 is released, and under the influence of the elastic element 2, the roller 15 rewinds the curtain 172.

[0049] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A reset device, characterized in that, Including the main body (1), An elastic element (2) is provided inside the main body (1); The main body (1) includes a housing (3) and a shaft block (4) movably disposed at the center of the housing (3); One end of the elastic element (2) is fixed to the shaft block (4), and the other end is fixed to the housing (3); When the housing (3) moves relative to the shaft block (4), the elastic element (2) is tightened or relaxed.

2. The reset device according to claim 1, characterized in that, The housing (3) is composed of a main housing (31) and a secondary housing (32), and fasteners are provided to fix the secondary housing (32) to the main housing (31). The main housing (31) is provided with a cavity for accommodating the elastic element (2). The shaft block (4) is composed of a central shaft (41) and side shafts (42) located on both sides of the central shaft (41). The main shell (31) and the sub-shell (32) are provided with recessed areas (5) for accommodating the side shafts (42). The side shaft (42) is composed of a first side shaft (421) and a second side shaft (422), and the recessed area (5) includes a first recessed area (51) and a second recessed area (52) that correspond to the first side shaft (421) and the second side shaft (422) and have different diameters.

3. A reset device according to claim 2, characterized in that, A polygonal hole is provided to pass through the shaft block (4) in the axial direction; A through layer (411) is provided at the edge of the central shaft (41) to cut it off, and one end of the elastic member (2) is placed in the through layer (411) and wound around the central shaft (41); It also includes a fixing block disposed on the main shell (31), and the end of the elastic element (2) which is wound around multiple times is fixed to the fixing block.

4. A reset device according to claim 2, characterized in that, The main shell (31) and the secondary shell (32) are provided with corresponding fastening structures; Includes a notch (6) provided on the cover surface of the main shell (31) and a protrusion (7) provided on the cover surface of the secondary shell (32); The notch (6) on the main shell (31) of the other body (1) is inserted into the protrusion (7) on the sub-shell (32).

5. A reset device according to claim 4, characterized in that, The main shell (31) and the sub-shell (32) are each provided with a slot (1411) (8) and several rib slots (9) at corresponding positions; Guide edges (10) are provided on both the slot (1411)(8) and the rib groove (9).

6. A reset device according to claim 2, characterized in that, The cover surfaces of the main shell (31) and the secondary shell (32) are provided with guide marks (11) facing the same direction.

7. A roller assembly comprising the reset device as described in claim 5, characterized in that, It also includes, The bearing seat (12) is composed of a shaft body (121) and a shaft tail (122), and has a through hole in the center; A torsion shaft (13) includes a main shaft (131) and a secondary shaft (132) located on the main shaft (131), the bearing seat (12) is mounted on the secondary shaft (132), and the main body (1) is mounted on the main shaft (131); A locking device (14) is provided between the bearing seat (12) and the torsion shaft (13) to control the linkage state between the bearing seat (12) and the torsion shaft (13); Roller (15), with torsion shafts (13) bearing the bearing seat (12) installed on both sides of the roller (15), and rotating synchronously with the bearing seat (12) and the reset device.

8. A roller assembly according to claim 7, characterized in that, At least one protrusion (1211) is provided on the shaft body (121) and abuts against the main body (1). The first protrusion (1211) and the second protrusion (1211) are respectively provided on the shaft seats (12) on both sides of the roller (15). The torsion shaft (13) passes through the center of the shaft block (4), and the main body (1) on the torsion shaft (13) is located near the shaft seat (12) on the side of the main shell (31). When the first protrusion (1211) has a protrusion (7) at its edge that corresponds to the notch (6) on the main shell (31), the second protrusion (1211) has a notch (6) at its edge that corresponds to the protrusion (7) on the sub-shell (32). Otherwise, the first protrusion (1211) has the notch (6) and the second protrusion (1211) has the protrusion (7).

9. A roller assembly according to claim 7, characterized in that, The locking device (14) includes, A locking block (141) is provided at one end of the secondary shaft (132) in the length direction; A locking block (142) is provided at the tail of the shaft (122), and the locking block (142) is movably disposed on the tail of the shaft (122); The locking block (141) is provided with at least one slot (1411) (8) that cooperates with the card block (142); The tail of the shaft (122) is provided with a convex round block (143) to restrict the card block (142) from moving closer to the card slot (1411)(8); The card block (142) is embedded in the card slot (1411)(8), with the first direction being the locked state and the second direction being the unlocked state.

10. A roller assembly according to claim 7, characterized in that, The inner wall of the roller (15) is provided with an arc-shaped groove (151) and a reinforcing rib (152) that cooperate with the slot (1411)(8) and the rib groove (9).

11. A roller assembly according to claim 7, characterized in that, One end of the torsion shaft (13) near the reset device is provided with a limiting pad (16) to restrict the reset device from disengaging from the torsion shaft (13), and a fastener is provided to fix it on the torsion shaft (13).

12. A roller blind (17) comprising the roller assembly of claim 10, characterized in that, It also includes a housing (171) for mounting the roller assembly, wherein roller seats (1711) are provided on both sides inside the housing (171), the torsion shaft (13) on the roller assembly is embedded in the roller seat (1711), and one end of the curtain (172) is embedded in the arc groove (151) of the roller (15) and wound around the roller (15).

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