CN212508018U - Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head - Google Patents
Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head Download PDFInfo
- Publication number
- CN212508018U CN212508018U CN202021571908.5U CN202021571908U CN212508018U CN 212508018 U CN212508018 U CN 212508018U CN 202021571908 U CN202021571908 U CN 202021571908U CN 212508018 U CN212508018 U CN 212508018U
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- Prior art keywords
- cover
- head
- sleeve
- driving sleeve
- drive
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- Withdrawn - After Issue
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- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 239000011324 bead Substances 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 210000003625 skull Anatomy 0.000 abstract description 5
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 11
- 238000005096 rolling process Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model discloses a making head and a bead-pulling hand-push roller shutter composed of the making head, wherein the making head comprises a main body shaft; the main body shaft penetrates through the head making cover; the chain wheel is rotationally arranged on the main body shaft; drive arrangement, drive arrangement install at the main part epaxially, and drive arrangement includes outer drive cover and interior drive cover, and outer drive cover rotates the cover and establishes including the drive cover outside, is equipped with canceling release mechanical system between outer drive cover and the interior drive cover, and drive arrangement passes through clutch and is connected with the top of system skull. The chain wheel is connected with the outer driving sleeve of the driving device, so that the chain wheel and the outer driving sleeve rotate and displace relative to the inner driving sleeve, the clutch device is linked with the driving device and the head making cover, and the chain wheel can control the movement of the head making cover; when the chain wheel stops being pulled, the reset mechanism enables the outer driving sleeve and the inner driving sleeve to be reset, so that the clutch device is opened, and the driving device and the head making cover move independently. The utility model discloses a roll up curtain can also can the hand push control through drawing the pearl control, and the range of application is wide, is worth promoting.
Description
Technical Field
The utility model relates to a system head and draw pearl hand push book curtain of constituteing among the window decorations technical field.
Background
In daily life, children often can pull the drawing pearl of rolling up the curtain and play, and this has brought certain potential safety hazard, can appear even drawing the pearl or the stay cord condition of hurting children. In contrast, hand-pushed curtain systems such as hand-pushed roller curtains have been developed, but such hand-pushed curtain systems have limited height and are difficult to operate directly with hands for more than 2 meters; and the roller shutter below 1.2 meters is inconvenient to operate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a system head and constitute draw pearl hand push roller shutter, it can the hand push operation, also can be with drawing the pearl operation.
According to an embodiment of the first aspect of the present invention, there is provided a headpiece, which includes a main body shaft; the main body shaft penetrates through the head making cover; a sprocket rotatably mounted on the main body shaft; drive arrangement, drive arrangement installs main part is epaxial, drive arrangement includes outer drive cover and interior drive sleeve, outer drive sleeve rotates the cover and establishes outside interior drive sleeve, outer drive sleeve with be equipped with canceling release mechanical system between the interior drive sleeve, the sprocket is connected and can be driven outer drive sleeve, drive arrangement pass through clutch with the top of system skull is connected.
According to the utility model discloses the embodiment of the first aspect, furtherly, the lateral wall top of outer driving sleeve is equipped with first recess, the lateral wall top of interior driving sleeve is equipped with the second recess, first recess with the relative part of coincidence forms the displacement groove in the second recess, clutch with the groove looks butt that shifts.
According to the utility model discloses in the embodiment of the first aspect, further, first recess with the second recess is V type groove.
According to the utility model discloses the embodiment of the first aspect, furtherly, clutch includes separation and reunion cover and spring, the one end butt of spring is in on the separation and reunion cover, the other end butt of spring is in the interior top of system skull, the separation and reunion cover is close to be equipped with on the terminal surface of system skull top can with the first meshing portion of system skull meshing.
According to the utility model discloses in the embodiment of the first aspect, furtherly, be equipped with the opening on the lateral wall of interior drive cover and the constant head tank relative with the opening, canceling release mechanical system includes two opposite arrangement's reset torsion spring, each the first end foot of reset torsion spring is fixed on the constant head tank, each form the space that resets between the second end foot of reset torsion spring, the outer drive cover is equipped with protruding muscle, protruding muscle can with the space cooperation that resets.
According to the utility model discloses an embodiment of the first aspect, furtherly, the outer drive cover is including the cover body and base, the lateral wall bottom of the cover body is equipped with the breach, be equipped with the dog on the edge of base, the dog with the breach suits, protruding muscle is located the inboard of dog.
According to the utility model discloses the first aspect embodiment, furtherly, outer drive cover with still be equipped with locking mechanical system between the interior drive cover, locking mechanical system includes at least one locking torsion spring, two end feet of locking torsion spring all stretch out the opening, two end feet of locking torsion spring respectively with the open-ended both sides one-to-one, the main part axle runs through all locking torsion springs.
According to the utility model discloses first aspect embodiment, furtherly, the reset torsion spring with be equipped with the isolation pad piece between the locking torsion spring.
According to the utility model discloses in the embodiment of the first aspect, furtherly, the base of outer drive cover is equipped with second meshing portion, outer drive cover through second meshing portion with the sprocket is connected.
According to the utility model discloses a second aspect embodiment provides a draw pearl hand push roller shutter, its characterized in that: the curtain body is wound on the roller pipe, two ends of the roller pipe are connected with the tail making head and the tail making head respectively, and the roller pipe is further connected with a spring system.
The utility model has the advantages that: the chain wheel is connected with the outer driving sleeve of the driving device, so that the chain wheel and the outer driving sleeve rotate and displace relative to the inner driving sleeve, the clutch device is linked with the driving device and the head making cover, and the chain wheel can control the movement of the head making cover; when the chain wheel stops being pulled, the reset mechanism enables the outer driving sleeve and the inner driving sleeve to be reset, so that the clutch device is opened, and the driving device and the head making cover move independently. The utility model discloses a roll up curtain can also can the hand push control through drawing the pearl control, and the range of application is wide, is worth promoting.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
Fig. 1 is an exploded view of the present invention;
FIG. 2 is a schematic view of the assembled structure of the present invention;
fig. 3 is a front cross-sectional view of the present invention after assembly;
FIG. 4 is a schematic view of the structure of the inner driving sleeve of the present invention;
fig. 5 is a schematic view of the base structure of the external driving sleeve in the present invention;
FIG. 6 is a schematic structural view of the inner driving sleeve, the locking mechanism and the reset mechanism of the present invention;
fig. 7 is a schematic view of the engagement between the inner driving sleeve and the outer driving sleeve and the clutch device.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 3, a headblock according to an embodiment of the present invention includes a main body shaft 10, a headblock cover 20, a sprocket 30, and a driving device. The main body shaft 10 penetrates through the head making cover 20, the chain wheel 30 is installed on the main body shaft 10 in a rolling mode through the deep groove bearing 31, and the top end of the main body shaft 10 is provided with the locking cap 34 so as to guarantee that parts on the main body shaft 10 cannot fall out of the main body shaft 10. The sprocket cover 32 covers the end face of the sprocket 30, and the driving device is connected to the tip end of the head cover 20 by a clutch device. The sprocket 30 is connected to a driving device so that when the sprocket 30 rotates, it can drive the driving device, and the driving device controls the clutch device to be linked with the head cover 20.
Referring to fig. 4 to 7, the driving device is mounted on the main body shaft 10, the driving device includes an outer driving sleeve 40 and an inner driving sleeve 50, the outer driving sleeve 40 is rotatably sleeved outside the inner driving sleeve 50, a base 42 of the outer driving sleeve 40 is provided with a second engagement portion, the outer driving sleeve 40 is connected with the sprocket 30 through the second engagement portion, and the sprocket 30 can drive the outer driving sleeve 40. The drive is likewise located in the head cap 20, and a needle bearing 33 is provided between the drive and the head cap, so that the drive and the head cap can be moved independently of one another. The top end of the side wall of the outer driving sleeve 40 is provided with a first groove 411, the top end of the side wall of the inner driving sleeve 50 is provided with a second groove 51, the inner and outer overlapped parts of the first groove 411 and the second groove 51 form a shifting groove, and the clutch device is abutted against the shifting groove. When the outer driving sleeve 40 and the inner driving sleeve 50 are relatively rotated, the overlapping area of the first recess 411 and the second recess 51 is changed, so that the depth of the shift groove is changed, and the clutch device is moved along the axial direction with the change of the depth of the shift groove because the clutch device is abutted against the shift groove.
Preferably, the first groove 411 and the second groove 51 are both V-shaped grooves, and the areas of the first groove 411 and the second groove 51 are equal. Since the first groove 411 and the second groove 51 are both V-shaped grooves, the shift groove is also a V-shaped groove, so that when the outer driving sleeve 40 rotates relative to the inner driving sleeve 50, the clutch device moves more continuously and smoothly along with the shift groove, and the phenomenon of jamming when the clutch device moves is avoided. In addition, the shifting groove is a V-shaped groove, so that the clutch device can be better clamped and fixed in the shifting groove and cannot be disengaged when the driving device rotates, and the kinematic connection is disconnected.
Further, in order to make the stress of the clutch device more uniform and reduce the probability of deviation of the clutch device in the movement process, the driving device is provided with a plurality of displacement slots, i.e. the outer driving sleeve 40 is provided with a plurality of first grooves 411, correspondingly, the inner driving sleeve 50 is provided with a plurality of second grooves 51, and the first grooves 411 and the second grooves 51 are in one-to-one correspondence; each shifting groove is arranged at equal intervals to ensure that the stress of the clutch device is uniform.
The clutch device comprises a clutch sleeve 81 and a spring 82, one end of the spring 82 abuts against the clutch sleeve 81, the other end of the spring 82 abuts against the inner top of the maker cover 20, and preferably, both ends of the spring 82 are provided with gaskets. The end surface of the clutch sleeve 81 far from the top of the mechanism cover 20 is provided with an abutting part abutting against the displacement groove, and preferably, the abutting part comprises at least one abutting column abutting against the bottom of the displacement groove. In an embodiment, the abutment comprises a plurality of abutment posts, each of which is equally spaced apart in the circumferential direction of the clutch sleeve. The clutch sleeve 81 is provided with a first engaging portion engageable with the head cover 20 on an end surface thereof near the top of the head cover 20. When the outer driving sleeve 40 and the inner driving sleeve 50 rotate relatively and the depth of the displacement groove becomes smaller, the clutch sleeve 81 is abutted by the abutting part and the displacement groove, so that the clutch sleeve 81 moves close to the top of the head making cover 20 along the axial direction of the main body shaft 10 under the driving of the driving device, and compresses the spring 82 while moving until the first engaging part of the clutch sleeve 81 is engaged with the inner top of the head making cover 20, at this time, the sprocket 30 is linked with the head making cover 20 through the driving device and the clutch sleeve 81, thereby driving the head making cover 20 to rotate. When the driving device is reset, the depth of the displacement groove is restored, the clutch sleeve 81 is far away from the top of the mechanism cover 20 under the action of the spring 82, and therefore the chain wheel 30 is restored to the state of moving independently of the mechanism cover 20.
Referring to fig. 4 to 6, a reset mechanism is further disposed between the outer driving sleeve 40 and the inner driving sleeve 50, an opening 53 and a positioning groove 52 opposite to the opening 53 are disposed on a side wall of the inner driving sleeve 50, the reset mechanism includes two oppositely disposed reset torsion springs 70, a first end foot of each reset torsion spring 70 is fixed on the positioning groove 52, a reset space 71 is formed between second end feet of each reset torsion spring 70, the outer driving sleeve 40 is provided with a protruding rib 421, and the protruding rib 421 can be matched with the reset space 71. Optionally, the outer driving sleeve 40 includes a sleeve body 41 and a base 42, a notch is provided at the bottom of the side wall of the sleeve body 41, a stopper is provided on the edge of the base 42, the stopper is adapted to the notch, the rib 421 is located at the inner side of the stopper, and accordingly, the positioning groove 52 is located on the sleeve body 41. Since the outer driving sleeve 40 is mainly composed of the sleeve body 41 and the base 42, the installation of the return torsion spring 70 or other components is facilitated. After the two restoring torsion springs 70 are reversely installed in the sheath body 41, the stoppers are corresponding to the notches to install the base 42 on the sheath body 41. The convex rib 421 on the stopper is clamped in the reset space 71, when the outer driving sleeve 40 rotates towards one direction, the convex rib 421 pushes the end pin of one reset torsion spring 70, and the outer driving sleeve 40 and the inner driving sleeve 50 do not integrally rotate until the convex rib 421 contacts the side wall of the opening 53; when the chain wheel 30 stops rotating, the chain wheel 30 does not exert force on the outer driving sleeve 40, at the moment, the reset torsion spring 70 resets under the action of elastic potential energy, the outer driving sleeve 40 resets through the convex rib, then the shifting groove restores to the original state, and the clutch sleeve 81 is separated to be meshed with the head making cover 20. Since the two return torsion springs 70 are oppositely disposed, the above process can be repeated when the outer drive sleeve 40 is rotated in the other direction, i.e., the other return torsion spring 70 can also return it.
Further, a locking mechanism is provided between the outer drive sleeve 40 and the inner drive sleeve 50. The locking mechanism comprises at least one locking torsion spring 60, two end legs of the locking torsion spring 60 extend out of the opening 53, and the two end legs of the locking torsion spring 60 are respectively opposite to two sides of the opening 53. The main shaft 10 penetrates all the locking torsion springs 60, and the locking torsion springs 60 are clasped on the main shaft 10 in a natural state. When the outer driving sleeve 40 rotates relative to the inner driving sleeve 50, the rib 421 rotates relative to the inner driving sleeve 50 until the rib 421 abuts against the side wall of the opening 53, the inner driving sleeve 50 is directly driven to rotate, and then the other side of the opening 53 of the inner driving sleeve 50 abuts against the end pin of the locking torsion spring 60, so that the locking torsion spring 60 is opened, the friction force of the locking torsion spring on the main shaft 10 is reduced, and the purpose that the inner driving sleeve 50 can synchronously rotate along with the outer driving sleeve 40 is achieved. Since the locking torsion spring 60 is tightly wound around the main body shaft 10 and its two end legs are opposite to the two side walls of the opening 53, the sprocket 30 can be kept stationary and stable without being pulled.
Preferably, to reduce the interaction between the return torsion spring 70 and the locking torsion spring 60, a spacer 61 is provided between the return torsion spring 70 and the locking torsion spring 60.
The embodiment of the utility model provides an in draw pearl hand push to roll up curtain, it includes the curtain body, makes the tail, draws pearl, reelpipe and foretell system head, the curtain body is convoluteed on the reelpipe, the both ends of reelpipe respectively with make head and system tail connection, the reelpipe still is connected with spring system.
The operation principle of the hand-push rolling curtain with the pull beads is as follows: when the curtain body descends or ascends to an improper height, the pull bead can be pulled, and the pull bead driving chain wheel 30 rotates. Since the sprocket 30 is engaged with the base 42, the outer driving sleeve formed by the base 42 and the sleeve body 41 is integrally rotated therewith. The convex rib 421 on the base 42 rotates in the reset space 71, and the convex rib 421 rotates to abut against one side wall of the opening 53 of the inner driving sleeve 50, so as to drive the inner driving sleeve 50 to rotate; at the same time, the first recess 411 of the outer driving sleeve 40 and the second recess 51 of the inner driving sleeve 50 are misaligned with each other so that the depth of the formed displacement groove is reduced, and thus the clutch sleeve 81 moves toward the top of the head cover 20 in the axial direction of the main body shaft 10. The clutch sleeve 81 moves, the spring 82 is compressed, the clutch sleeve 81 moves to be meshed with the inner top part of the head making cover 20, at the moment, the sprocket wheel drives the outer driving sleeve 40 and the clutch sleeve 81 to drive the head making cover 20 to rotate, and therefore the rolling and releasing of the curtain on the roller pipe can be controlled.
When the curtain is retracted into position, the pull beads are released. The outer driving sleeve 40 is not acted by the sprocket 30, and the rib 421 drives the whole outer driving sleeve 40 to reset under the action of the reset torsion spring 70. The displacement groove formed on the driving device is restored to the original state, and the depth of the displacement groove is increased. Since the abutting portion of the clutch sleeve 81 is always abutted against the bottom of the displacement groove by the spring 82, the clutch sleeve is separated from the inner top portion of the head cover 20, and the clutch sleeve 81 is disconnected from the head cover 20. At this time, the movement of the head making cover is controlled by the rolling pipe and the spring system, and the function of pushing the rolling curtain by hand is realized.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (10)
1. A headpiece, comprising:
a main body shaft (10);
a head manufacturing cover (20), wherein the main body shaft (10) penetrates through the head manufacturing cover (20);
a sprocket (30), the sprocket (30) being rotatably mounted on the main body shaft (10);
drive arrangement, drive arrangement installs on main part axle (10), drive arrangement includes outer drive cover (40) and interior drive cover (50), outer drive cover (40) rotate the cover and establish outside interior drive cover (50), outer drive cover (40) with be equipped with canceling release mechanical system between interior drive cover (50), sprocket (30) are connected and can drive outer drive cover (40), drive arrangement pass through clutch with the top of system end lid (20) is connected.
2. The headpiece according to claim 1, wherein: the lateral wall top of outer driving sleeve (40) is equipped with first recess (411), the lateral wall top of interior driving sleeve (50) is equipped with second recess (51), first recess (411) with the relative part of the inside and outside coincidence of second recess (51) forms the groove that shifts, clutch with shift groove looks butt.
3. The headpiece according to claim 2, wherein: the first groove (411) and the second groove (51) are both V-shaped grooves.
4. The headpiece according to claim 2, wherein: the clutch device comprises a clutch sleeve (81) and a spring (82), one end of the spring (82) is abutted to the clutch sleeve (81), the other end of the spring (82) is abutted to the inner top of the head making cover (20), and the clutch sleeve (81) is close to a first meshing part which can be meshed with the head making cover (20) and is arranged on the end face of the top of the head making cover (20).
5. The headpiece according to any one of claims 1 to 4, wherein: the side wall of the inner driving sleeve (50) is provided with an opening (53) and a positioning groove (52) opposite to the opening (53), the reset mechanism comprises two reset torsion springs (70) which are oppositely arranged, a first end foot of each reset torsion spring (70) is fixed on the positioning groove (52), a reset space (71) is formed between second end feet of each reset torsion spring (70), the outer driving sleeve (40) is provided with a convex rib (421), and the convex rib (421) can be matched with the reset space (71).
6. The headpiece according to claim 5, wherein: the outer driving sleeve (40) comprises a sleeve body (41) and a base (42), a notch is formed in the bottom of the side wall of the sleeve body (41), a stop block is arranged on the edge of the base (42), the stop block is matched with the notch, and the convex rib (421) is located on the inner side of the stop block.
7. The headpiece according to claim 5, wherein: outer drive cover (40) with still be equipped with locking mechanical system between interior drive cover (50), locking mechanical system includes at least one locking torsion spring (60), two end feet of locking torsion spring (60) all stretch out opening (53), two end feet of locking torsion spring (60) respectively with the both sides one-to-one of opening (53) are relative, main part axle (10) run through all locking torsion springs (60).
8. The headpiece according to claim 7, wherein: and an isolation gasket (61) is arranged between the reset torsion spring (70) and the locking torsion spring (60).
9. The headpiece according to claim 6, wherein: and a base (42) of the outer driving sleeve (40) is provided with a second meshing part, and the outer driving sleeve (40) is connected with the chain wheel (30) through the second meshing part.
10. The utility model provides a draw pearl hand push curtain, its characterized in that: the curtain comprises a curtain body, a tail, a pull bead, a reel pipe and the head of any one of claims 1 to 9, wherein the curtain body is wound on the reel pipe, two ends of the reel pipe are respectively connected with the head and the tail, and the reel pipe is further connected with a spring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021571908.5U CN212508018U (en) | 2020-07-31 | 2020-07-31 | Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021571908.5U CN212508018U (en) | 2020-07-31 | 2020-07-31 | Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508018U true CN212508018U (en) | 2021-02-09 |
Family
ID=74443845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021571908.5U Withdrawn - After Issue CN212508018U (en) | 2020-07-31 | 2020-07-31 | Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894435A (en) * | 2020-07-31 | 2020-11-06 | 广州市珏饰窗饰科技有限公司 | Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head |
-
2020
- 2020-07-31 CN CN202021571908.5U patent/CN212508018U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894435A (en) * | 2020-07-31 | 2020-11-06 | 广州市珏饰窗饰科技有限公司 | Bead-pulling hand-pushed roller shutter with head and bead-pulling hand-pushed roller shutter formed by head |
| CN111894435B (en) * | 2020-07-31 | 2024-06-04 | 广州市珏饰窗饰科技有限公司 | Head making and bead pulling hand-push roller shutter formed by same |
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