CN113279648A - Two-way buffering door closer of hinged door - Google Patents
Two-way buffering door closer of hinged door Download PDFInfo
- Publication number
- CN113279648A CN113279648A CN202110567201.XA CN202110567201A CN113279648A CN 113279648 A CN113279648 A CN 113279648A CN 202110567201 A CN202110567201 A CN 202110567201A CN 113279648 A CN113279648 A CN 113279648A
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- Prior art keywords
- plate
- door
- spring
- seat
- swing
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 29
- 238000003825 pressing Methods 0.000 claims abstract description 18
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000009194 climbing Effects 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 101150006573 PAN1 gene Proteins 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F5/00—Braking devices, e.g. checks; Stops; Buffers
- E05F5/06—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
- E05F5/08—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops with springs
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
- E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
- E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
- E05F1/14—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with double-acting springs, e.g. for closing and opening or checking and closing no material
Landscapes
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
The utility model provides a two-way buffering door closer of hinged-door, its includes drain pan and face guard, forms spacing district between drain pan and the face guard, and a swing arm is articulated through the hinge hole on swing seat and the drain pan, and the swing arm rotates around this hinge hole: the limiting area is slidably mounted with a groove-shaped counter plate, the driving plate is slidably mounted in the counter plate, and a first spring is arranged between the counter plate and the limiting area. And a second spring is arranged between the counter-thrust plate and the drive plate, a guide wheel is arranged on one side of the drive plate, which faces the swinging seat, and the guide wheel is always in contact with the outer contour of the swinging seat under the action of the drive plate and applies pressure on the outer contour of the swinging seat. The invention has the beneficial effects that: this door closer and cabinet body installation back can realize pressing down the bounce-back formula and open, consequently need not to install parts such as door handle on the cabinet door, are favorable to keeping the neat and artistic of the cabinet body, avoid children and handle to take place the potential safety hazard that causes of colliding with, promote its security.
Description
Technical Field
The invention relates to a hardware fitting, in particular to a bidirectional buffering door closer of a hinged door.
Background
Various furniture with vertical hinged doors are necessary for common families, the vertical hinged door is generally connected with a cabinet body of the furniture through a hinge, the vertical hinged door is opened or closed through a handle on a sliding door or a component with a similar function by a user when the vertical hinged door is opened or closed, the vertical hinged door of the furniture often collides the head of a child in the family because of no handle, and the vertical hinged door is inconvenient to open or close by pushing and pulling on the other hand. Therefore, avoiding the drawbacks of the prior art, achieving a more convenient opening or closing of the side hung door of a piece of furniture remains a problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a bidirectional buffering door closer for a hinged door, which has a simple structure and is convenient to use and can realize automatic rebound opening and automatic reset buffering closing of the door of the hinged door.
The purpose of the invention is realized by adopting the following scheme: the utility model provides a two-way buffering door closer of hinged door which characterized in that: it includes drain pan and face guard, forms spacing district between drain pan and the face guard, and a swing arm is articulated through the hinge hole on swing seat and the drain pan, and the swing arm rotates around this hinge hole:
the limiting area is slidably provided with a groove-shaped counter plate, the counter plate is internally slidably provided with a driving plate, a first spring is arranged between the counter plate and the limiting area, and the first spring pushes the counter plate to move towards the direction of the swinging seat all the time;
a second spring is arranged between the counter push plate and the driving plate, the second spring pushes the driving plate to move towards the direction of the swinging seat all the time, a guide wheel is arranged on one side of the driving plate, which faces the swinging seat, and the guide wheel is in contact with the outer contour of the swinging seat all the time under the action of the driving plate and applies pressure on the outer contour of the swinging seat;
the outer contour of the swing seat is provided with a climbing area which protrudes outwards, one side of the climbing area, which is far away from the swing arm, is a door opening area, one side of the climbing area, which is close to the swing arm, is a door closing area, when the swing arm is opened, the guide wheel is positioned on the door opening area, the climbing area and the door closing area to slide, and the door closing area is arranged in a concave manner;
the swing seat is also provided with a spring seat protruding outwards, the third spring is arranged between the spring seat and the counter-thrust plate, and the third spring pulls the swing seat to swing towards the opening direction all the time;
a release buckle is arranged in the reverse push plate in a swinging mode and is linked with a trigger buckle protruding out of the lower end face of the bottom shell, and when the trigger buckle is driven to move, the trigger buckle drives the release buckle to swing and be in butt joint with or separated from a lock catch which is hinged to the tail of the driving plate; when the lock catch and the release catch are hung and buckled, the clamping table at the top of the lock catch is pressed on the tail part of the driving plate to limit the relative position between the driving plate and the counter push plate.
The anti-push plate is provided with an anti-push barrel, a rebound push spring and a rebound column are installed in the anti-push barrel, the rebound push spring pushes the rebound column to move towards the lock catch to push the lock catch to swing outwards, and the clamping table at the top of the lock catch is forced to enter the moving stroke of the drive plate.
The front surface and the rear surface of the swing seat are also covered with pressing plates, and correspondingly, two sides of the swing seat are respectively provided with a door opening buffer push plate and a door closing buffer push plate in a sliding mode to be contacted with the pressing plates; a first buffer is arranged between the door opening buffering push plate and the counter push plate, and a second buffer is arranged between the door closing buffering push plate and the bottom box.
The first buffer and the second buffer are self-resetting compression type dampers.
The contact point of the pressing plate, the door opening buffer push plate and the door closing buffer push plate is arranged to deviate from the rotating center of the pressing plate.
The bottom shell is fixedly provided with a spring wheel, and the third spring bypasses the spring wheel and is connected with the spring seat.
Trigger buckle upper and lower telescopic sliding mounting on the drain pan, trigger to detain and transversely be provided with the drive groove, correspondingly: the release buckle is provided with a guide post which is arranged in the drive groove in a sliding way.
The invention has the beneficial effects that: 1. simple structure, low production cost and improved market competitiveness. 2. This door closer and cabinet body installation back can realize pressing down the bounce-back formula and open, consequently need not to install parts such as door handle on the cabinet door, are favorable to keeping the neat and artistic of the cabinet body, avoid children and handle to take place the potential safety hazard that causes of colliding with, promote its security. 3. When the cabinet door is opened and closed to the extreme position, all have buffer function to avoid the cabinet door and the cabinet body, bump and produce the noise between cabinet door and the spacing part, promote its operation feel. 4. The interaction surface between the driving plate and the swinging seat is connected by the guide wheel, so that the sliding connection is changed into rolling connection, the basic function is realized, and meanwhile, the friction between the driving plate and the swinging seat is reduced, so that the working is more quiet and stable, the abrasion is reduced, and the service life is prolonged. 5. The front surface and the rear surface of the swing seat are covered with a pressing plate which is contacted with the buffer to generate door opening buffering and door closing buffering force, and the buffering acting force is more direct, so that the abrasion to the guide wheel is reduced.
Drawings
FIG. 1 is a diagram showing the effect of the present invention in use when installed with a cabinet.
FIG. 2 is a diagram of the assembly effect of the structure of the present invention.
Fig. 3 and 4 are assembly views of the structure of the invention.
Fig. 5 is an assembly view of a visor construction of the present invention.
Fig. 6-9 are schematic views of the opening process of the door closer according to the present invention (hidden counter plate).
Fig. 10-11 are schematic views of the closing process of the door closer according to the invention (hidden counterthrust plate).
FIG. 12 is an assembly view of a release button and a trigger button of the present invention.
FIG. 13 is a schematic view of the structure of the pressing plate of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The utility model provides a two-way buffering door closer of hinged door which characterized in that: it includes drain pan 1 and face guard 2, forms spacing district 3 between drain pan 1 and the face guard 2, and a swing arm 4 is articulated through hinge hole 6 on swing seat 5 and the drain pan 1, and swing arm 4 rotates around this hinge hole 6:
a reverse pushing plate 7 is arranged in a groove shape in a sliding manner in the limiting area 3, a driving plate 8 is arranged in the reverse pushing plate 7 in a sliding manner, a first spring 9 is arranged between the reverse pushing plate 7 and the limiting area 3, and the first spring 9 pushes the reverse pushing plate 7 to move towards the direction of the oscillating seat 5 all the time;
a second spring 10 is arranged between the counter-thrust plate 7 and the driving plate 8, the second spring 10 pushes the driving plate 8 to move towards the direction of the swinging seat 5 all the time, a guide wheel 81 is arranged on one side of the driving plate 8 facing the swinging seat 5, and the guide wheel 81 is in contact with the outer contour of the swinging seat 5 all the time under the action of the driving plate 8 and applies pressure on the outer contour of the swinging seat 5;
the outer contour of the swing seat 5 is provided with a climbing area 51 which protrudes outwards, one side of the climbing area 51, which is far away from the swing arm 4, is a door opening area 52, one side of the climbing area 51, which is close to the swing arm 4, is a door closing area 53, when the swing arm 4 is opened, the guide wheel 81 is positioned on the door opening area 52, the climbing area 51 and the door closing area 53 to slide, and the door closing area 53 is arranged inwards in a recessed manner;
the swing seat 5 is also provided with a spring seat 54 protruding outwards, a third spring 55 is arranged between the spring seat 54 and the counter plate 7, and the third spring 55 pulls the swing seat 5 to swing towards the opening direction all the time;
a release buckle 71 is further arranged in the counter push plate 7 in a swinging mode, the release buckle 71 is linked with a trigger buckle 72 protruding out of the lower end face of the bottom shell 1, and when the trigger buckle 72 is driven to move, the trigger buckle 72 drives the release buckle 71 to swing and be in butt joint with or separated from a lock catch 73 hinged to the tail of the driving plate 8; when the lock catch 73 is hooked with the release catch 71, the clamping table 74 at the top of the lock catch is pressed against the tail part of the drive plate 8, so that the relative position between the drive plate 8 and the counter plate 7 is limited.
The counter-pushing plate 7 is provided with a counter-spring cylinder 75, a counter-spring pushing spring and a counter-spring post 76 are installed in the counter-spring cylinder 75, the counter-spring pushing spring pushes the counter-spring post 76 to move towards the latch 73, the latch 73 is pushed to swing outwards, and the clamping table 74 at the top of the latch 73 is forced to enter the moving stroke of the drive plate 8.
The front surface and the rear surface of the swing seat 5 are also covered with pressing plates 56, and correspondingly, two sides of the swing seat 5 are respectively provided with a door opening buffer push plate 57 and a door closing buffer push plate 58 in a sliding manner to be contacted with the pressing plates 56; a first buffer 59 is arranged between the door opening buffer push plate 57 and the counter push plate, and a second buffer 60 is arranged between the door closing buffer push plate 58 and the bottom box.
The first buffer 59 and the second buffer 60 are self-resetting compression dampers.
The contact point of the pressing plate 56 with the door opening buffer push plate 57 and the door closing buffer push plate 58 is arranged to deviate from the rotation center of the pressing plate 56.
The bottom shell 1 is also fixedly provided with a spring wheel 36, and a third spring 55 bypasses the spring wheel 36 and is connected with a spring seat 54.
The trigger button 72 is slidably mounted on the bottom case 1 in an up-down telescopic manner, and a driving groove 77 is transversely arranged on the trigger button 72, correspondingly: the release button 71 is provided with a guide post 78 slidably mounted in the drive slot 77.
The working principle is as follows: as shown in fig. 1, in the structure of the present embodiment, when the door closer is mounted to a concealed door type cabinet, the main body of the door closer is fixed to the cabinet 21, and the swing arm 4 of the door closer is mounted to the cabinet door 22 via the guide rail 23 at the head thereof.
As shown in fig. 1, when the cabinet door is in an open state, the swing arm outwards supports the cabinet door, and since the swing arm is hinged and fixed on the main body of the door closer through the swing seat and pulled by the third spring 55, the tension of the third spring 55 can play a role in positioning the swing arm, so that the swing arm can keep the open state of the cabinet door, and the cabinet door is prevented from being closed under the operation of non-external force.
As shown in fig. 5 and 6, when the cabinet door needs to be opened, the cabinet door is pressed inward, the trigger button 72 is pressed by the cabinet door, the trigger button 72 lifts up the tail of the release button 71 while moving inward, the front end of the release button is forced to swing downward, and the release button 71 is forced to swing to separate from the lock catch 73 which is hinged to the tail of the driving plate; when the lock catch 73 is separated from the release catch 71, the clamping table 74 at the top of the lock catch is separated from the tail part of the driving plate 8, and the driving plate pushes the driving plate to move backwards and separate from the door closing area on the swinging seat under the reaction force of the guide wheel 81. Meanwhile, the swing seat 5 rotates outwards under the tension of the third spring, and the swing arm is used for pushing the cabinet door outwards to open. After the door is fully opened, the second spring 10 pushes the driving plate forward to move, so that the guide wheel is in contact with the door opening area 52. At the same time, the rebounding spring pushes the rebounding post 76 to move towards the latch 73, which pushes the latch 73 to swing outwards, and the clamping table 74 on the top of the latch 73 is forced to enter the moving stroke of the drive plate 8. And the release buckle 71 swings upwards to reset, and is buckled with the lock catch 73 again to lock the relative position between the driving plate and the counter push plate.
Wherein, it is required to be noted that: in order to prevent the swing seat from being too fast when being opened, which causes the door panel to be fast opened and causes danger. In the scheme, the front surface and the rear surface of the swing seat 5 are covered and installed with pressing plates 56, correspondingly, a door opening buffering push plate 57 is arranged at the front end of the swing seat 5 in a sliding mode, and a first buffer 59 is arranged between the door opening buffering push plate 57 and the counter push plate. When the door opening stroke reaches the set value, the pressing plate 56 contacts the door opening buffer push plate 57 and pushes the door opening buffer push plate 57 toward the first buffer 59, and the first buffer 59 serves to buffer the door opening speed.
As shown in fig. 10, when the user closes the cabinet door, an external force operates the cabinet door, the sliding door drives the swing arm to swing inwards along the swing seat, the swing seat stretches the third spring 55 when swinging, and presses the guide wheel 81 through the swing seat, so that the guide wheel 81 moves from the door opening area 52 to the climbing area 51, and during the movement, the guide wheel pushes the driving plate and the counter-pushing plate to move backwards synchronously, so as to compress the first spring 9, and prepare for automatic reset closing.
As shown in fig. 11, when the closing angle of the swing arm is smaller than 45 ° (the angle can be controlled by the climbing area), the guide wheel enters the door closing area 53 from the climbing area 51, the first spring 9 pushes the guide wheel reversely to press the door closing area 53, and the swing seat is forced to move towards the closing direction, so that the power for automatically closing the cabinet door is generated. When the guide wheel completely enters the door closing area, the swing arm is completely closed, and door closing pressure is generated.
In order to avoid the phenomenon that the closing speed is too high and the cabinet door and the cabinet body generate impact noise, a door closing buffering push plate 58 is further arranged on the front side of the pressing plate, and a second buffer 60 is arranged between the door closing buffering push plate 58 and the bottom box. When the door closing angle is smaller than the set value, the pressing plate contacts with the door closing buffering push plate 58 and pushes the door closing buffering push plate to move towards the direction of the second buffer 60, and the second buffer 60 is utilized to slow down the movement speed of the door closing buffering push plate 58, so that the effect of slowing down the automatic door closing speed is achieved.
Wherein, it is required to be noted that: the buffering of opening the door in the present case and avoiding the buffering all directly act on swing seat through the clamp plate, consequently, its atress is more direct, and power transmission is also more high-efficient. Thereby reduced the friction to the guide pulley for the inner structure arranges more scientifically, regular.
Compared with the prior art, the door closer in the present case not only can realize opening the function to the bounce-back formula of cabinet door, can also realize the automatic two-way cushioning effect of opening and closing of cabinet door to avoid the cabinet door and the cabinet body between take place the collision and produce the noise. In addition, the structure in the present case adopts to press the bounce-type to open, consequently need not to install operating parts such as handle on the cabinet door, when keeping cabinet body appearance clean and tidy pleasing to the eye, has avoided operating parts such as handle and children to bump, or the emergence hook such as clothing, has promoted its security, so can extensively use widely.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (7)
1. The utility model provides a two-way buffering door closer of hinged door which characterized in that: it includes drain pan (1) and face guard (2), forms spacing district (3) between drain pan (1) and face guard (2), and hinge hole (6) on swing seat (5) and drain pan (1) are articulated through swing arm (4), and swing arm (4) are around this hinge hole (6) to rotate:
the limiting area (3) is slidably provided with a groove-shaped counter plate (7), the counter plate (7) is internally slidably provided with a driving plate (8), a first spring (9) is arranged between the counter plate (7) and the limiting area (3), and the first spring (9) pushes the counter plate (7) to move towards the swinging seat (5) all the time;
a second spring (10) is arranged between the counter push plate (7) and the driving plate (8), the second spring (10) pushes the driving plate (8) to move towards the swinging seat (5) all the time, a guide wheel (81) is arranged on one side, facing the swinging seat (5), of the driving plate (8), and the guide wheel (81) is in contact with the outer contour of the swinging seat (5) all the time under the action of the driving plate (8) and is pressed on the outer contour of the swinging seat (5);
the outer contour of the swing seat (5) is provided with a climbing area (51) which protrudes outwards, one side of the climbing area (51) far away from the swing arm (4) is a door opening area (52), one side of the climbing area (51) close to the swing arm (4) is a door closing area (53), when the swing arm (4) is opened and closed, the guide wheel (81) is positioned on the door opening area (52), the climbing area (51) and the door closing area (53) to slide, and the door closing area (53) is arranged inwards in a recessed manner;
the swing seat (5) is also provided with a spring seat (54) protruding outwards, a third spring (55) is arranged between the spring seat (54) and the counter plate (7), and the third spring (55) pulls the swing seat (5) to swing towards the opening direction all the time;
a release buckle (71) is further arranged in the counter push plate (7) in a swinging mode, the release buckle (71) is linked with a trigger buckle (72) protruding out of the lower end face of the bottom shell (1), and when the trigger buckle (72) is driven to move, the trigger buckle (72) drives the release buckle (71) to swing to be in butt joint with or separate from a lock catch (73) hinged to the tail of the driving plate (8); when the lock catch (73) is buckled with the release buckle (71), the clamping table (74) at the top of the lock catch is pressed against the tail part of the driving plate (8) to limit the relative position between the driving plate (8) and the counter plate (7).
2. The bi-directional buffering door closer for the hinged door according to claim 1, wherein: the anti-push plate (7) is provided with an anti-elastic barrel (75), an anti-elastic pushing spring and an anti-elastic column (76) are installed in the anti-elastic barrel (75), the anti-elastic pushing spring pushes the anti-elastic column (76) to move towards the lock catch (73), the lock catch (73) is pushed to swing outwards, and the clamping table (74) at the top of the lock catch (73) is forced to enter the moving stroke of the drive plate (8).
3. The bi-directional buffering door closer for the hinged door according to claim 1, wherein: the front surface and the rear surface of the swing seat (5) are also covered with pressing plates (56), and correspondingly, two sides of the swing seat (5) are respectively provided with a door opening buffer push plate (57) and a door closing buffer push plate (58) in a sliding manner to be contacted with the pressing plates (56); a first buffer (59) is arranged between the door opening buffer push plate (57) and the counter push plate, and a second buffer (60) is arranged between the door closing buffer push plate (58) and the bottom box.
4. The bi-directional buffering door closer for the hinged door according to claim 3, wherein: the first buffer (59) and the second buffer (60) are self-resetting compression type dampers.
5. The bi-directional buffering door closer for the hinged door according to claim 3, wherein: the contact point of the pressure plate (56) with the door opening buffer push plate (57) and the door closing buffer push plate (58) is deviated from the rotating center of the pressure plate (56).
6. The bi-directional buffering door closer for the hinged door according to claim 1, wherein: the bottom shell (1) is also fixedly provided with a spring wheel (36), and a third spring (55) bypasses the spring wheel (36) and is connected with a spring seat (54).
7. The bi-directional buffering door closer for the hinged door according to claim 1, wherein: the trigger button (72) is vertically and telescopically arranged on the bottom shell (1) in a sliding manner, a driving groove (77) is transversely arranged on the trigger button (72), and correspondingly: the release buckle (71) is provided with a guide post (78) which is slidably arranged in the driving groove (77).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110567201.XA CN113279648A (en) | 2021-05-24 | 2021-05-24 | Two-way buffering door closer of hinged door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110567201.XA CN113279648A (en) | 2021-05-24 | 2021-05-24 | Two-way buffering door closer of hinged door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113279648A true CN113279648A (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110567201.XA Pending CN113279648A (en) | 2021-05-24 | 2021-05-24 | Two-way buffering door closer of hinged door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113279648A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024131507A1 (en) * | 2022-12-24 | 2024-06-27 | 广东联迅精密制造有限公司 | Bidirectional cushioning door opener |
-
2021
- 2021-05-24 CN CN202110567201.XA patent/CN113279648A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024131507A1 (en) * | 2022-12-24 | 2024-06-27 | 广东联迅精密制造有限公司 | Bidirectional cushioning door opener |
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