CN108843130B - Push-pull box of push-pull lock - Google Patents
Push-pull box of push-pull lock Download PDFInfo
- Publication number
- CN108843130B CN108843130B CN201810898364.4A CN201810898364A CN108843130B CN 108843130 B CN108843130 B CN 108843130B CN 201810898364 A CN201810898364 A CN 201810898364A CN 108843130 B CN108843130 B CN 108843130B
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- Prior art keywords
- rack
- push
- fixed
- piece
- transmission rod
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/22—Locks or fastenings with special structural characteristics operated by a pulling or pushing action perpendicular to the front plate, i.e. by pulling or pushing the wing itself
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention relates to a push-pull box of a push-pull lock, which comprises a base, a cover plate, a gear set, a rack set, a transmission rod, a reversing piece and a limiting piece, wherein the cover plate is arranged on the base; the rack set comprises a first rack and a second rack, and the first rack and the second rack are respectively meshed with two sides of the gear set; the transmission rod is provided with a fixing hole; the bottom of the reversing piece is provided with a bump part and a clearance part, and the first rack and the second rack are respectively provided with a fixed groove which is matched with the bump part; still be equipped with spacing hole on the transfer line, be equipped with the square locating part that one end is fixed on the base, the locating part is fixed on the base and the orientation is adjustable from top to bottom. The invention can realize the conversion of four door opening modes through the relative change of the direction of the reversing piece and the limiting piece, and the switch of the door opening modes is more striking, and the service life of the push-pull box is longer.
Description
Technical Field
The invention relates to the technical field of door locks, in particular to a push-pull box of a push-pull lock.
Background
In order to realize four door opening modes of left push, left pull, right push and right pull of the door lock, a push-pull box is required to be arranged in the lock body as a transmission mechanism. The push-pull box structure of the push-pull lock disclosed in the patent with the patent number ZL201610811290.7 needs to use two groups of screws and limiting holes to limit the push-pull box, when in actual use, the limiting holes which are required to be installed by the screws are selected according to a specific door opening mode, when the push-pull box is used, due to frequent door opening and closing, the screws can loose after receiving impact, the service life of the push-pull box is not long, and the four door opening modes are not directly changed by using the screws.
Disclosure of Invention
The invention aims to provide a push-pull box of an intuitive and durable push-pull lock aiming at the defects in the prior art.
To achieve the purpose, the invention adopts the following technical scheme:
a push-pull box of a push-pull lock comprises a base, a cover plate, a gear set, a rack set, a transmission rod, a reversing piece and a limiting piece; the gear set, the rack set, the transmission rod, the reversing piece and the limiting piece are all arranged in a cavity formed between the base and the cover plate;
the rack set comprises a first rack and a second rack, and the first rack and the second rack are respectively meshed with two sides of the gear set;
the transmission rod is provided with a fixing hole; the bottom of the reversing piece is provided with a bump part and a clearance part, and the first rack and the second rack are respectively provided with a fixed groove which is matched with the bump part; the transmission rod is also provided with a limiting hole, the base is provided with a square limiting piece with one end fixed, and the limiting piece is fixed on the base and has adjustable up-down direction; when the limiting piece faces upwards, the transmission rod moves in an upper stroke, and when the limiting piece faces downwards, the transmission rod moves in a lower stroke;
when the push-pull box is in a first state, the protruding block part is matched and fixed with the first rack, the reversing piece is fixed with the transmission rod, the limiting piece faces upwards, and the limiting piece is fixed with the base; the second rack is reserved or detached;
when the push-pull box is in a second state, the protruding block part is matched and fixed with the first rack, the reversing piece is fixed with the transmission rod, the limiting piece faces downwards, and the limiting piece is fixed with the base; the second rack is reserved or detached;
when the push-pull box is in a third state, the convex block part is matched and fixed with the second rack, the reversing piece is fixed with the transmission rod, the limiting piece faces upwards, and the limiting piece is fixed with the base; the first rack is reserved or detached;
when the push-pull box is in a fourth state, the convex block part is matched and fixed with the second rack, the reversing piece is fixed with the transmission rod, the limiting piece faces downwards, and the limiting piece is fixed with the base; the first rack is reserved or detached.
Further stated, the reversing piece is provided with an extension portion, the extension portion extends to a single side along the upper surface of the reversing piece, the extension portion is provided with a screw hole for fixing the reversing piece and the transmission rod, and the extension portion and the protruding block portion are on the same side.
Further stated, the surface of the reversing piece is also provided with a holding part, the holding part comprises a holding bulge at the center and holding depressions at two sides, and the holding depressions are arc-shaped depression parts extending towards two sides along the holding bulge.
Further stated, the first rack and the second rack are respectively provided with a step part, and when the transmission rod moves to the top end of the stroke, the upper side of the clearance part touches the step parts to limit.
To illustrate still further, the gear set includes a main gear, a first gear and a second gear, each of the first gear and the second gear including an upper gear portion engaged with the main gear and a lower gear portion engaged with the first rack or the second rack; the rotating shafts of the upper gear part and the lower gear part are the same.
Further stated, the two sides of the base are provided with transmission rod sliding grooves, and the transmission rods slide up and down in the transmission rod sliding grooves.
Further describing, the four vertex angles of the limiting hole are provided with arc accommodating parts for accommodating the four vertex angles of the limiting piece.
Further stated, the base is provided with a rack chute, the edges of the inner sides of the first rack and the second rack are of convex structures, and when the first rack and the second rack move up and down, the convex structures slide in the rack chute.
Further describing, the cover plate is provided with a reversing piece accommodating part and a limiting piece accommodating part; the longitudinal distance between the reversing piece accommodating part and the limiting piece accommodating part is not less than the movement travel range of the transmission rod.
Further stated, the fixing grooves of the first rack and the second rack are designed as half-open grooves which are arranged oppositely, and a gap is reserved between the first rack and the second rack.
The invention has the beneficial effects that: the change of four door opening modes of left push, left pull, right push and right pull can be realized through the relative change of the direction of the reversing piece and the limiting piece, the setting of the reversing piece and the limiting piece enables the door opening mode to be more striking, and meanwhile, the volumes of the reversing piece and the limiting piece are relatively large, so that the convenience is brought to the taking operation of installers. The larger three-dimensional structure of the reversing piece and the limiting piece can bear the impact action on the limiting piece when the door is opened and closed for more times, so that the service life of the push-pull box is longer. The slotted holes formed in the cover plate are fewer, so that the internal space can be prevented from entering sundries, the processing steps of the cover plate can be simplified, and the production efficiency is improved.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic overall construction of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an exploded view of one embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3;
FIG. 5 is a partial schematic of an embodiment of the present invention;
fig. 6 is a schematic structural view of a reversing member according to an embodiment of the present invention.
Wherein: the gear train comprises a base 1, a transmission rod sliding groove 11, a rack sliding groove 12, a cover plate 2, a reversing element accommodating part 21, a limiting element accommodating part 22, a gear set 3, a main gear 31, a first gear 32, a second gear 33, a rack set 4, a first rack 41, a second rack 42, a fixing groove 401, a step part 402, a transmission rod 5, a fixing hole 51, a limiting hole 52, an arc accommodating part 521, a reversing element 6, a bump part 61, a clearance part 62, an extension part 63, a pinching part 64, a pinching protrusion 641, a pinching recess 642 and a limiting element 7.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
As shown in fig. 1, a push-pull box of a push-pull lock comprises a base 1, a cover plate 2, a gear set 3, a rack set 4, a transmission rod 5, a reversing piece 6 and a limiting piece 7; the gear set 3, the rack set 4, the transmission rod 5, the reversing piece 6 and the limiting piece 7 are all arranged in a cavity formed between the base 1 and the cover plate 2;
the rack set 4 comprises a first rack 41 and a second rack 42, and the first rack 41 and the second rack 42 are respectively meshed with two sides of the gear set 3;
the transmission rod 5 is provided with a fixed hole 51; the reversing piece 6 is fixed with the transmission rod 5 and passes through the fixing hole 51 to fix the transmission rod 5 with the first rack 41 or the second rack 42; the bottom of the reversing piece 6 is provided with a bump part 61 and a clearance part 62, the first rack 41 and the second rack 42 are provided with fixing grooves 401 which are matched with the bump part 61, when the bump part 61 is matched and fixed with the fixing grooves 401 on the first rack 41 or the second rack 42, the reversing piece 6 is fixed with the first rack 41 or the second rack 42, and meanwhile, the second rack 42 or the first rack 41 which is not fixed with the bump part 61 can freely move through the clearance part 62;
the transmission rod 5 is also provided with a limiting hole 52, the base 1 is provided with a square limiting piece 7 with one end fixed, and the limiting piece 7 is fixed on the base 1 and has adjustable up and down directions; when the limiting piece 7 faces upwards, the transmission rod 5 moves in an upper stroke, and when the limiting piece 7 faces downwards, the transmission rod 5 moves in a lower stroke.
When the left pulling function is realized, the lug part 61 is matched and fixed with the first rack 41 on the left side, the reversing piece 6 is fixed with the transmission rod 5, the direction of the limiting piece 7 is adjusted, the limiting piece 7 faces upwards, the transmission rod 5 moves in an upward stroke, and finally the limiting piece 7 is fixed on the base 1; when the right pushing function is realized, the lug part 61 is matched and fixed with the first rack 41 on the left side, the reversing piece 6 is fixed with the transmission rod 5, the direction of the limiting piece 7 is adjusted, the limiting piece 7 faces downwards, the transmission rod 5 moves in the lower stroke, and finally the limiting piece 7 is fixed on the base 1; when the left pushing function is realized, the lug part 61 is matched and fixed with the second rack 42 on the right side, the reversing piece 6 is fixed with the transmission rod 5, the direction of the limiting piece 7 is adjusted, the limiting piece 7 faces upwards, the transmission rod 5 moves in an upper stroke, and finally the limiting piece 7 is fixed on the base 1; when the left-pulling function is realized, the lug part 61 is matched and fixed with the second rack 42 on the right side, the reversing piece 6 is fixed with the transmission rod 5, the direction of the limiting piece 7 is adjusted, the direction of the limiting piece 7 is downward, the transmission rod 5 moves in the downward stroke, and finally the limiting piece 7 is fixed on the base 1. After the production of the push-pull box is finished, one of the push-pull box and the left push box and the right push box can be defaulted, and if the user is inconsistent with the default door opening mode during use, the user only needs to detach the corresponding reversing piece 6 or the limiting piece 7 and change the direction of the reversing piece, the reversing piece 6 plays a left-right reversing role in the conversion process of the door opening mode, the limiting piece 7 plays a push-pull mode conversion role, and compared with the screw limiting mode in the prior art, the push-pull box is more remarkable. In addition, due to the design of the clearance part 62 in the reversing piece 6, after one door opening mode is selected, the first rack 41 or the second rack 42 on the other side does not need to be disassembled, and great convenience is provided in use. When the limiting piece 7 limits the transmission rod 5, firstly the whole limiting piece 7 can bear the impact action of the limiting piece 7 for more times compared with the cylinder sleeve directly fixed by the screw in the prior art, and the limiting piece 7 can have longer service life. And secondly, only one large limit groove is needed to be formed, so that the production and processing steps are simplified, and the production efficiency is improved.
To further illustrate, the reversing element 6 is provided with an extension portion 63, the extension portion 63 extends to a single side along the upper surface of the reversing element 6, a screw hole for fixing the reversing element 6 and the driving rod 5 is formed in the extension portion 63, and the extension portion 63 is on the same side as the bump portion 61.
The contact area of the reversing piece 6 and the transmission rod 5 is increased by the single-side extension portion 63, so that the fixing effect of the reversing piece 6 and the transmission rod 5 is enhanced, in addition, the single-side extension portion 63 plays a role in reversing indication, and for a worker installing a door, the distinction of four door opening modes of left pushing, left pulling, right pushing and right pulling is likely to be unclear, so that a user is helped to change the door opening mode, errors are likely to occur when the user is helped to adjust the reversing piece 6, and multiple attempts clearly increase the installation time. The surface of the extension 63 on one side can be provided with a striking arrow, and simultaneously, the transmission rod 5 or the cover plate 2 can be provided with character patterns of four door opening modes, and when the arrow points to the corresponding character, the corresponding door opening mode is indicated, so that the occurrence of installation errors can be effectively reduced.
To further illustrate, the surface of the reversing element 6 is further provided with a holding portion 64, the holding portion 64 includes a central holding protrusion 641 and holding recesses 642 on both sides, and the holding recesses 642 are circular arc-shaped recess portions extending along the holding protrusion 641 to both sides.
When the direction of the reversing piece 6 is changed, the reversing piece 6 needs to be entirely taken out to change the direction and then is installed at the corresponding position, and because the reversing piece 6 is large in size, the pinching projection 641 and the pinching recess 642 are arranged for convenient disassembly, the pinching projection 641 is convenient for fingers to pinch the reversing piece 6, and the pinching recess 642 is convenient for providing a finger accommodating part, so that the fingers have better force application points.
To further illustrate, the first rack 41 and the second rack 42 are provided with a step portion 402, and when the driving rod 5 moves to the top of the stroke, the upper side of the clearance portion 62 contacts against the step portion 402 to limit.
The double limiting function is achieved, firstly, the limiting piece 7 is matched with the limiting hole 52 on the transmission rod 5 to limit the motion of the transmission rod 5, secondly, when the transmission rod 5 moves to the top end of a stroke, the step portion 402 is matched with the clearance portion 62 to limit the transmission rod 5, so that the limiting effect can be guaranteed, and the impact effect received by the limiting piece 7 during limiting can be dispersed to a part of the reversing piece 6, so that the local impact effect is reduced, and the purpose of prolonging the service life is achieved.
To illustrate further, the gear set 3 includes a main gear 31, a first gear 32 and a second gear 33, and the first gear 32 and the second gear 33 each include an upper gear portion engaged with the main gear 31 and a lower gear portion engaged with the first rack 41 or the second rack 42; the rotating shafts of the upper gear part and the lower gear part are the same.
Firstly, the complex gear transmission mechanism is avoided by the composite gear, so that the structure of the push-pull box is lighter, and the first rack 41 or the second rack 42 drives the main gear 31 to rotate through the first gear 32 or the second gear 33 respectively, so that the transmission process is simpler and more labor-saving.
To further illustrate, two sides of the base 1 are provided with a transmission rod chute 11, and the transmission rod 5 slides up and down in the transmission rod chute 11.
Because the transmission rod 5, the rack set 4 and the gear set 3 are not positioned on the same horizontal plane, when the transmission rod 5 moves up and down, the transmission rod sliding grooves 11 are arranged on the two sides of the base 1, the transmission rod 5 can move stably along the sliding grooves, and the stability of the movement of the transmission rod 5 is ensured.
To further illustrate, the four corners of the limiting hole 52 are provided with arc receiving portions 521 for receiving the four corners of the limiting member 7.
When the limiting hole 52 is used for limiting the limiting piece 7, the limiting piece 7 collides with the upper end and the lower end of the limiting hole 52, so that the vertex angle position of the limiting piece 7 is prevented from being damaged by frequent collision, the arc-shaped containing part is arranged at the vertex angle of the limiting hole 52, the limiting piece 7 can be protected, and holes are formed in the four vertex angles of the limiting hole 52 and are easier to realize than the processing of the vertex angle of the limiting piece 7.
To further illustrate, the base 1 is provided with a rack chute 12, the inner edges of the first rack 41 and the second rack 42 are in a protruding structure, and when the first rack 41 and the second rack 42 move up and down, the protruding structure slides in the rack chute 12.
The protruding structure slides in the rack chute 12, and the first rack 41 and the second rack 42 can move up and down in the vertical direction without deflecting left and right, so that the matching smoothness of the gear and the rack and the accuracy of transmission are ensured.
To illustrate further, the cover plate 2 is provided with a reversing element accommodating portion 21 and a limiting element accommodating portion 22; the longitudinal distance between the reversing element accommodating part 21 and the limiting element accommodating part 22 is not less than the movement travel range of the transmission rod 5.
When the push-pull box is actually installed, if the direction of the reversing piece 6 or the limiting piece 7 is to be replaced, only the reversing piece 6 or the limiting piece 7 is required to be detached and the direction is adjusted, and then the reversing piece 6 and the limiting piece 7 are installed in situ by using screws, so that the cover plate 2 or other components are not required to be detached, and the push-pull box is very convenient.
To further illustrate, the fixing grooves 401 of the first rack 41 and the second rack 42 are of a half-open groove type design, and a gap is reserved between the first rack 41 and the second rack 42.
Firstly, the half-open slot type design can avoid the problem of difficult assembly caused by production errors of the fixed slot 401 or the convex block part 61 during installation, so that the reversing piece 6 is easy to install and disassemble; the first rack 41 and the second rack 42 are spaced, so that on one hand, the problem of difficult assembly caused by production errors of the fixing groove 401 or the protruding block portion 61 can be further avoided, on the other hand, the protruding block portion 61 can be guaranteed to fix the first rack 41 or the second rack 42 only without affecting the other rack in a blocking manner, and meanwhile, enough space is reserved between the two racks to guarantee that the first rack 41 and the second rack 42 move independently of each other and are not interfered with each other.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.
Claims (8)
1. A push-pull box of push-pull lock, characterized by: comprises a base, a cover plate, a gear set, a rack set, a transmission rod, a reversing piece and a limiting piece; the gear set, the rack set, the transmission rod, the reversing piece and the limiting piece are all arranged in a cavity formed between the base and the cover plate;
the rack set comprises a first rack and a second rack, and the first rack and the second rack are respectively meshed with two sides of the gear set;
the transmission rod is provided with a fixing hole; the bottom of the reversing piece is provided with a bump part and a clearance part, and the first rack and the second rack are respectively provided with a fixed groove which is matched with the bump part; the transmission rod is also provided with a limiting hole, the base is provided with a square limiting piece with one end fixed, and the limiting piece is fixed on the base and has adjustable up-down direction; when the limiting piece faces upwards, the transmission rod moves in an upper stroke, and when the limiting piece faces downwards, the transmission rod moves in a lower stroke;
when the push-pull box is in a first state, the protruding block part is matched and fixed with the first rack, the reversing piece is fixed with the transmission rod, the limiting piece faces upwards, and the limiting piece is fixed with the base; the second rack is reserved or detached;
when the push-pull box is in a second state, the protruding block part is matched and fixed with the first rack, the reversing piece is fixed with the transmission rod, the limiting piece faces downwards, and the limiting piece is fixed with the base; the second rack is reserved or detached;
when the push-pull box is in a third state, the convex block part is matched and fixed with the second rack, the reversing piece is fixed with the transmission rod, the limiting piece faces upwards, and the limiting piece is fixed with the base; the first rack is reserved or detached;
when the push-pull box is in a fourth state, the convex block part is matched and fixed with the second rack, the reversing piece is fixed with the transmission rod, the limiting piece faces downwards, and the limiting piece is fixed with the base; the first rack is reserved or detached;
the surface of the reversing piece is also provided with a holding part, the holding part comprises a holding bulge at the center and holding depressions at two sides, and the holding depressions are arc-shaped depression parts extending towards two sides along the holding bulge;
the first rack and the second rack are respectively provided with a step part, and when the transmission rod moves to the top end of the stroke, the upper side of the clearance part touches the step parts to limit.
2. A push-pull box for a push-pull lock according to claim 1, wherein: the reversing piece is provided with an extension part, the extension part extends to a single side along the upper surface of the reversing piece, the extension part is provided with a screw hole for fixing the reversing piece and the transmission rod, and the extension part and the lug part are on the same side.
3. A push-pull box for a push-pull lock according to claim 1, wherein: the gear set comprises a main gear, a first gear and a second gear, wherein the first gear and the second gear comprise an upper gear part meshed with the main gear and a lower gear part meshed with the first rack or the second rack; the rotating shafts of the upper gear part and the lower gear part are the same.
4. A push-pull box for a push-pull lock according to claim 1, wherein: and driving rod sliding grooves are formed in two sides of the base, and the driving rods slide up and down in the driving rod sliding grooves.
5. A push-pull box for a push-pull lock according to claim 1, wherein: the four vertex angles of the limiting hole are provided with arc accommodating parts for accommodating the four vertex angles of the limiting piece.
6. A push-pull box for a push-pull lock according to claim 1, wherein: the base is provided with a rack chute, the inner edges of the first rack and the second rack are of convex structures, and when the first rack and the second rack move up and down, the convex structures slide in the rack chute.
7. A push-pull box for a push-pull lock according to claim 1, wherein: the cover plate is provided with a reversing piece accommodating part and a limiting piece accommodating part; the longitudinal distance between the reversing piece accommodating part and the limiting piece accommodating part is not less than the movement travel range of the transmission rod.
8. A push-pull box for a push-pull lock according to claim 1, wherein: the fixed grooves of the first rack and the second rack are designed into half-open grooves which are oppositely arranged, and a gap is reserved between the first rack and the second rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898364.4A CN108843130B (en) | 2018-08-08 | 2018-08-08 | Push-pull box of push-pull lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898364.4A CN108843130B (en) | 2018-08-08 | 2018-08-08 | Push-pull box of push-pull lock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843130A CN108843130A (en) | 2018-11-20 |
| CN108843130B true CN108843130B (en) | 2023-09-05 |
Family
ID=64195432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810898364.4A Active CN108843130B (en) | 2018-08-08 | 2018-08-08 | Push-pull box of push-pull lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843130B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173153B (en) * | 2019-05-09 | 2021-01-26 | 深圳绿米联创科技有限公司 | Reversing mechanism of sliding door lock and sliding door lock |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR535188A (en) * | 1920-10-13 | 1922-04-11 | Reversible lock with grooves | |
| US6454322B1 (en) * | 2000-09-21 | 2002-09-24 | Frank Su | Door lock set optionally satisfying either left-side latch or right-side latch |
| CN106320817A (en) * | 2016-09-08 | 2017-01-11 | 深圳市凯迪仕智能科技有限公司 | Push-pull lock |
| CN108086792A (en) * | 2017-12-29 | 2018-05-29 | 浙江钜士安防科技股份有限公司 | A kind of push and pull bar lock |
-
2018
- 2018-08-08 CN CN201810898364.4A patent/CN108843130B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR535188A (en) * | 1920-10-13 | 1922-04-11 | Reversible lock with grooves | |
| US6454322B1 (en) * | 2000-09-21 | 2002-09-24 | Frank Su | Door lock set optionally satisfying either left-side latch or right-side latch |
| CN106320817A (en) * | 2016-09-08 | 2017-01-11 | 深圳市凯迪仕智能科技有限公司 | Push-pull lock |
| CN108086792A (en) * | 2017-12-29 | 2018-05-29 | 浙江钜士安防科技股份有限公司 | A kind of push and pull bar lock |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843130A (en) | 2018-11-20 |
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