CN111472610B - Door lock handle mechanism, door body and unlocking method - Google Patents
Door lock handle mechanism, door body and unlocking method Download PDFInfo
- Publication number
- CN111472610B CN111472610B CN202010413280.4A CN202010413280A CN111472610B CN 111472610 B CN111472610 B CN 111472610B CN 202010413280 A CN202010413280 A CN 202010413280A CN 111472610 B CN111472610 B CN 111472610B
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- CN
- China
- Prior art keywords
- handle
- transmission
- seat
- pressing
- door lock
- Prior art date
- 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
- E05B3/00—Fastening knobs or handles to lock or latch parts
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B1/00—Knobs or handles for wings; Knobs, handles, or press buttons for locks or latches on wings
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
The invention relates to the technical field of door locks, in particular to a door lock handle mechanism, a door body and an unlocking method. A door lock handle mechanism comprising: a housing; the pressing transmission mechanism comprises a pressing handle and a transmission assembly, the transmission assembly is arranged in the shell and comprises a transmission rod and a rotation unit, one end of the pressing handle extends out of the shell, and the other end of the pressing handle is fixedly connected with the first end of the transmission rod; the square strip seat is arranged in the shell and is fixedly connected with the rotating unit; the pressing handle is pressed, and the rotating unit is abutted with the second end of the transmission rod and can rotate under the driving of the transmission rod so as to enable the square strip seat to rotate. The rotating unit is fixedly connected with the square strip seat, and can drive the square strip seat to rotate when the rotating unit rotates, so that the unlocking purpose is realized.
Description
Technical Field
The invention relates to the technical field of door locks, in particular to a door lock handle mechanism, a door body and an unlocking method.
Background
The conventional door lock is opened by rotating a handle or pushing and pulling the handle; the handle is opened the door and is realized opening the door by rotating the handle, and the handle push-pull is realized opening the door through pushing the handle or pulling the mode of opening the door of handle, but current handle or push-pull door lock, part wearing and tearing after using a period lead to handle or push-pull handle to rock, influence user experience and feel.
In order to solve the problem, a pressing door opening structure appears in the prior art, and although the structure can hide a handle and improve the service life of the handle, the pressing door opening structure is large in size and occupies a large area of a door body.
Therefore, a door lock handle mechanism, a door body and an unlocking method are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a door lock handle mechanism which can reduce the volume of the door lock handle mechanism and enable the door lock handle mechanism to be more compact.
To achieve the purpose, the invention adopts the following technical scheme:
provided is a door lock handle mechanism including:
a housing;
the pressing transmission mechanism comprises a pressing handle and a transmission assembly, the transmission assembly is arranged in the shell, the transmission assembly comprises a transmission rod and a rotation unit, one end of the pressing handle extends out of the shell, and the other end of the pressing handle is fixedly connected with the first end of the transmission rod;
the square strip seat is arranged in the shell and is fixedly connected with the rotating unit; the pressing handle is pressed, the rotating unit is abutted with the second end of the transmission rod and can rotate under the driving of the transmission rod, so that the square strip seat rotates.
As a preferable technical scheme of the door lock handle mechanism, the rotating unit comprises a connecting disc and a pushing rod which are connected with each other, a central shaft of the pushing rod is arranged in parallel with a central shaft of the connecting disc, the connecting disc is fixedly connected with the square strip seat, and the transmission rod can be abutted with the pushing rod and push the pushing rod to rotate along the central shaft of the connecting disc.
As a preferred technical scheme of above-mentioned lock handle mechanism, the shell includes bottom plate, shroud plate, handle seat and handle lid from inside to outside in proper order, the bottom plate with shroud plate fixed connection, be provided with on the bottom plate and make the first hole that square strip seat exposes, the connection pad set up in on the shroud plate and can be in the shroud plate internal rotation, the handle seat is fixed in on the shroud plate, handle seat one side is connected with the handle lid and is formed first cavity, press handle one end stretch out the handle seat, the other end set up in the first cavity, the handle seat opposite side is formed with the second cavity, the transfer line with the catch bar is located in the second cavity.
As a preferable technical scheme of the door lock handle mechanism, a containing groove is formed in one side, connected with the rotating unit, of the shroud plate, and part of the pushing rod is arranged in the containing groove.
As a preferable technical scheme of the door lock handle mechanism, the shroud plate is provided with a second hole for fixing the connecting disc, and the second hole is communicated with the accommodating groove.
As a preferable mode of the door lock handle mechanism, a first elastic member capable of resetting the pressing handle is provided between the handle cover and the pressing handle.
As a preferable technical scheme of the door lock handle mechanism, the transmission rod comprises a connecting part, transmission arms and transmission shaft sleeves, wherein one transmission arm extends from two ends of the connecting part to the rotating units respectively, and the transmission shaft sleeves are connected with the two transmission arms through pins.
As a preferable technical scheme of the door lock handle mechanism, a square strip seat support is arranged on one side, far away from the rotating unit, of the shroud plate, and the other end of the square strip seat penetrates through the square strip seat support.
The invention also provides a door body comprising the door lock handle mechanism.
The invention also provides a door unlocking method which is applied to the door body and comprises the following steps:
after the shell is gripped, the lower end of the pressing handle is pressed and pulled, and the transmission rod connected with the lower end of the pressing handle moves upwards along with the pressing handle and drives the rotating unit to rotate;
the rotating unit drives the square strip seat to rotate, and then the shell is pulled to unlock.
The invention has the beneficial effects that:
according to the door lock handle mechanism provided by the invention, the rotating unit is fixedly connected with the square bar seat, and the square bar seat can be driven to rotate when the rotating unit rotates, so that the unlocking purpose is realized.
According to the door body, in the using process of the door body, the handle is hidden, and the screwing-off lock of the square strip seat can be realized by pressing the handle, so that the door lock handle mechanism occupies small space of the door body, and the structure is more compact.
The door unlocking method provided by the invention can realize the purpose of unlocking when a user holds the shell, and the user does not need to rotate the shell again, so that the purpose of quick unlocking is realized.
Drawings
Fig. 1 is a schematic structural view of a door lock handle mechanism according to an embodiment of the present invention.
Fig. 2 is an exploded view of a door lock handle mechanism according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a rotating unit according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a handle seat according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a transmission rod according to an embodiment of the present invention.
Fig. 6 is a schematic view of a partial structure of a shroud provided by an embodiment of the present invention.
In the figure:
1. pressing the handle;
2. a transmission rod; 21. a connection part; 22. a transmission arm; 23. a driving sleeve; 24. a pin;
3. a rotation unit; 31. a connecting disc; 32. a push rod;
4. square strip seat;
5. a bottom plate; 51. a first hole;
6. a cladding plate; 61. a receiving groove; 62. a second hole; 63. a rotating bearing;
7. a handle base; 71. a connecting plate; 711. a fourth hole; 72. a connecting cylinder;
8. a handle cover;
9. a first elastic member;
10. square strip seat support;
11. a second elastic member;
12. briquetting;
13. a briquetting screw;
14. and (5) connecting screws.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The present embodiment provides a door lock handle mechanism which is reduced in volume and more compact in internal structure relative to the existing structure.
As shown in fig. 1 and 2, the door lock handle mechanism includes: the device comprises a shell, a pressing transmission mechanism and a square strip seat 4, wherein the pressing transmission mechanism comprises a pressing handle 1 and a transmission assembly, the transmission assembly is arranged in the shell, the transmission assembly comprises a transmission rod 2 and a rotation unit 3, one end of the pressing handle 1 extends out of the shell, and the other end of the pressing handle is fixedly connected with a first end of the transmission rod 2; the square strip seat 4 is arranged in the shell and is fixedly connected with the rotating unit 3; the pressing handle 1 is pressed, and the rotating unit 3 is abutted with the second end of the transmission rod 2 and can rotate under the driving of the transmission rod 2 so as to enable the square strip seat 4 to rotate.
The door lock handle mechanism provided in this embodiment, the rotation unit 3 and the square strip seat 4 are fixedly connected, the rotation unit 3 can drive the square strip seat 4 to rotate when rotating, the unlocking purpose is realized, and because the transmission rod 2 is directly abutted with the rotation unit 3 and pushes the rotation unit 3 to rotate, the volume of the rotation unit 3 is smaller, and more space in the shell is not occupied.
Preferably, in the present embodiment, as shown in fig. 3, the rotation unit 3 includes a connection disc 31 and a push rod 32 connected to each other, a central axis of the push rod 32 is disposed parallel to a central axis of the connection disc 31, the connection disc 31 is fixedly connected to the square bar 4, and the transmission rod 2 can abut against the push rod 32 and push the push rod 32 to rotate along the central axis of the connection disc 31. It can be understood that the push rod 32 is eccentrically arranged on the connecting disc 31, that is, the central axis of the push rod 32 is located at any side of the central axis of the connecting disc 31, and when the push rod 32 is pushed by the transmission rod 2, the connecting disc 31 can be driven to rotate, so that the connecting disc 31 drives the square bar seat 4 to rotate, and unlocking action is realized.
Preferably, with continued reference to fig. 2, in this embodiment, the outer shell includes, from inside to outside, a bottom plate 5, a shroud plate 6, a handle seat 7 and a handle cover 8, where the bottom plate 5 is fixedly connected to the shroud plate 6, a first hole 51 capable of exposing the square strip seat 4 is provided on the bottom plate 5, and the square strip seat 4 can rotate in the first hole 51; the connecting disc 31 is arranged on the shroud plate 6 and can rotate in the shroud plate 6, the handle seat 7 is fixed on the shroud plate 6, one side of the handle seat 7 is connected with the handle cover 8 to form a first cavity, one end of the pressing handle 1 extends out of the handle seat 7, the other end of the pressing handle is arranged in the first cavity, a second cavity is formed on the other side of the handle seat 7, and the transmission rod 2 and the pushing rod 32 are positioned in the second cavity. The pressing handle 1 is L-shaped, and the pressed end of the pressing handle 1 extends out of the first cavity, that is, the pressed end extends out of the handle seat 7, so that the pressing handle can be pressed by a user. The structure can ensure that the pressing handle 1 and the transmission rod 2 are positioned in the shell, so that the purpose of pressing the pressing handle 1 and the transmission rod 2 along with the action of the pressing handle 1 is realized.
It should be noted that, in this embodiment, the handle seat 7 is disposed in the middle of the shroud plate 6, and because the rotating unit 3 is disposed in the middle of the shroud plate 6, the distance between the square bar seat 4 and the transmission rod 2 can be shortened, so that the position of the handle seat 7 is centered, and the purpose that a child with a small height can unlock the lock can be ensured.
Further, the pressing handle 1 is fixed on the handle cover 8 through the pressing block 12 and the pressing block screw 13, so that the pressing handle 1 is ensured to be in a fixed position and cannot fall down to influence use. In order to enable the pressing handle 1 to automatically reset after pressing, a first elastic member 9 capable of resetting the handle is provided between the handle cover 8 and the pressing handle 1 in the present embodiment. The first elastic piece 9 is a spring, and two first elastic pieces 9 are arranged between the handle cover 8 and the pressing handle 1, so that the stress is uniform in the resetting process of the pressing handle 1.
It should be noted that, as shown in fig. 4, the handle seat 7 includes a connecting plate and a connecting tube, the connecting tube is obliquely disposed on the connecting plate, a third hole and a fourth hole 711 are disposed on the connecting plate, a second chamber is formed in the connecting tube, and the connecting tube is communicated with the third hole, so as to ensure that the transmission rod 2 can extend into the handle seat 7. The end of the pressing handle 1 not connected to the connection rod protrudes out of the fourth hole 711 for enabling the user to press. The connecting plate is fixedly connected with the handle cover 8 through a handle seat 7 through a screw, and the connecting cylinder is fixedly connected with the shroud plate 6 through a screw.
Preferably, as shown in fig. 5, in the present embodiment, the transmission rod 2 includes a connection part 21, transmission arms 22 and a transmission sleeve 23, the connection part 21 is fixedly connected with the lower end of the pressing handle 1, two ends of the connection part 21 extend obliquely to the direction of the rotating unit 3 respectively with one transmission arm 22, and two ends of the transmission sleeve 23 are connected with the two transmission arms 22 through pins 24. The inclination angle of the transmission arm 22 relative to the connecting part 21 is the same as the inclination angle of the connecting cylinder relative to the connecting plate, so that the transmission arm 22 can move in the connecting cylinder; the driving sleeve 23 can rotate on the pin 24, so that the driving sleeve 23 is in rolling contact with the rotating unit 3, friction between the driving sleeve 23 and the rotating unit 3 is reduced, and the whole mechanism operates smoothly.
In order to save space, in the present embodiment, it is preferable that, as shown in fig. 6, a receiving groove 61 is provided at a side of the sheathing panel 6 to which the rotating unit 3 is coupled, the handle holder 7 is fixedly coupled to the sheathing panel by a bolt, and a nut engaged with the bolt is provided in the receiving groove 61, and a portion of the push rod 32 is provided in the receiving groove 61. The arrangement can save the installation space in the second cavity, so that the volume of the handle seat 7 is smaller than that of the prior art, the materials are saved, and the manufacturing cost is reduced.
In order to enable the connection disc 31 to effectively drive the square bar 4 to rotate, the shroud plate 6 is provided with a second hole 62 for fixing the connection disc 31 in the embodiment, and the second hole 62 is communicated with the accommodating groove 61. In addition, the second hole 62 is provided with the rotating bearing 63, and the connecting disc 31 is in interference fit connection with the inner ring of the rotating bearing 63, so that friction between the connecting disc 31 and the shroud plate 6 in the rotating process can be reduced. One end of the square strip seat 4 penetrates into the connecting disc 31. It should be noted that one end of the square bar seat 4 is of a stepped shaft structure, one end of the stepped shaft, which is close to the connecting disc 31, is of a flat structure, referring to fig. 3, a connecting hole 311 is formed in the connecting disc 31, the connecting hole 311 comprises two symmetrically arranged arc-shaped side walls and two symmetrically arranged flat side walls, each arc-shaped side wall is respectively connected with one flat side wall, the two arc-shaped side walls and the two flat side walls form the hole wall of the connecting hole 311, and the structure can avoid the connecting disc 31 from being connected with the square bar seat 4 through keys, so that the structures of the connecting disc 31 and the square bar seat 4 are miniaturized, and the internal structure is compact. Of course, the connection hole 311 may be regarded as a waist-shaped hole. The cross section of the other end of the stepped shaft is circular. In order to fix the connection plate 31 and the square bar 4, the connection plate 31 and the square bar 4 are fixedly connected by the connection screw 14.
Because the square-strip seat 4 is longer, in order to prevent the square-strip seat 4 from sagging under the influence of gravity, a square-strip seat support 10 is provided on one side of the shroud plate 6 away from the rotating unit 3 in this embodiment, and the other end of the square-strip seat 4 passes through the square-strip seat support 10. The square strip seat support 10 is provided with a fourth hole for the square strip seat 4 to pass through, and meanwhile, the square strip seat 4 can be reset after rotating by the second elastic piece 11 arranged in the fourth hole, and the second elastic piece 11 is specifically a torsion spring.
The door body further comprises the door lock handle mechanism provided in the embodiment. In the using process of the door body, as the handle is hidden, the screwing unlocking of the square strip seat 4 can be realized by pressing the handle 1, so that the door lock handle mechanism occupies small space of the door body and has more compact structure.
The embodiment also provides a door unlocking method for unlocking the door provided in the embodiment, which comprises the following steps:
after the shell is gripped, the lower end of the pressing handle 1 is pressed and pulled, and the transmission rod 2 connected with the lower end of the pressing handle 1 moves upwards along with the pressing handle 1 and drives the rotating unit 3 to rotate;
the rotating unit 3 drives the square strip seat 4 to rotate, and then the shell is pulled to unlock.
The door unlocking method provided by the embodiment can achieve the purpose of unlocking when a user holds the shell, does not need to rotate the shell again, and achieves the purpose of quick unlocking.
Furthermore, the foregoing description of the preferred embodiments and the principles of the invention is provided herein. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A door lock handle mechanism, comprising:
a housing;
the pressing transmission mechanism comprises a pressing handle (1) and a transmission assembly, wherein the transmission assembly is arranged in the shell and comprises a transmission rod (2) and a rotation unit (3), one end of the pressing handle (1) extends out of the shell, and the other end of the pressing handle is fixedly connected with the first end of the transmission rod (2);
the square strip seat (4) is arranged in the shell and is fixedly connected with the rotating unit (3); the pressing handle (1) is pressed, the rotating unit (3) is abutted with the second end of the transmission rod (2) and can rotate under the driving of the transmission rod (2) so as to enable the square strip seat (4) to rotate;
the rotating unit (3) comprises a connecting disc (31) and a pushing rod (32) which are connected with each other, the central shaft of the pushing rod (32) is arranged in parallel with the central shaft of the connecting disc (31), the connecting disc (31) is fixedly connected with the square strip seat (4), and the transmission rod (2) can be abutted with the pushing rod (32) and push the pushing rod (32) to rotate along the central shaft of the connecting disc (31);
the transmission rod (2) comprises a connecting part (21), transmission arms (22) and transmission shaft sleeves (23), wherein one transmission arm (22) extends from two ends of the connecting part (21) to the rotating units (3), and the transmission shaft sleeves (23) are connected with the two transmission arms (22) through pins (24).
2. The door lock handle mechanism according to claim 1, wherein the housing comprises a bottom plate (5), a shroud plate (6), a handle seat (7) and a handle cover (8) from inside to outside in sequence, the bottom plate (5) is fixedly connected with the shroud plate (6), a first hole (51) capable of exposing the square bar seat (4) is formed in the bottom plate (5), a connecting disc (31) is arranged on the shroud plate (6) and can rotate in the shroud plate (6), the handle seat (7) is fixed on the shroud plate (6), one side of the handle seat (7) is connected with the handle cover (8) to form a first cavity, one end of the pressing handle (1) extends out of the handle seat (7), the other end of the pressing handle (1) is arranged in the first cavity, a second cavity is formed in the other side of the handle seat (7), and the transmission rod (2) and the pushing rod (32) are located in the second cavity.
3. Door lock handle mechanism according to claim 2, characterized in that the side of the shroud plate (6) connected to the rotating unit (3) is provided with a receiving groove (61), and that part of the push rod (32) is arranged in the receiving groove (61).
4. A door lock handle mechanism according to claim 3, wherein the shroud plate (6) is provided with a second hole (62) for fixing the connection plate (31), the second hole (62) being in communication with the receiving groove (61).
5. Door lock handle mechanism according to claim 2, characterized in that a first elastic member (9) is arranged between the handle cover (8) and the pressing handle (1) capable of resetting the pressing handle (1).
6. Door lock handle mechanism according to claim 2, characterized in that the side of the shroud plate (6) remote from the rotating unit (3) is provided with a square bar seat support (10), the other end of the square bar seat (4) passing through the square bar seat support (10).
7. A door body comprising a door lock handle mechanism as claimed in any one of claims 1 to 6.
8. A door unlocking method, which is applied to the door as claimed in claim 7, comprising the following steps:
after the shell is gripped, the lower end of the pressing handle (1) is pressed and lifted, and the transmission rod (2) connected with the lower end of the pressing handle (1) moves upwards along with the pressing handle (1) and drives the rotating unit (3) to rotate;
the rotating unit (3) drives the square strip seat (4) to rotate, and then the shell is pulled to unlock.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010413280.4A CN111472610B (en) | 2020-05-15 | 2020-05-15 | Door lock handle mechanism, door body and unlocking method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202010413280.4A CN111472610B (en) | 2020-05-15 | 2020-05-15 | Door lock handle mechanism, door body and unlocking method |
Publications (2)
Publication Number | Publication Date |
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CN111472610A CN111472610A (en) | 2020-07-31 |
CN111472610B true CN111472610B (en) | 2023-08-18 |
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CN202010413280.4A Active CN111472610B (en) | 2020-05-15 | 2020-05-15 | Door lock handle mechanism, door body and unlocking method |
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CN (1) | CN111472610B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN207092733U (en) * | 2017-08-14 | 2018-03-13 | 永康市嘉图工业产品设计有限公司 | A kind of push-and-pull smart lock |
CN207194640U (en) * | 2017-08-09 | 2018-04-06 | 郑元和 | A kind of electronic lock |
KR102062274B1 (en) * | 2018-09-07 | 2020-01-03 | 주식회사 엠에스씨엘 | Push-pull type digital door lock |
CN212376444U (en) * | 2020-05-15 | 2021-01-19 | 苏州琨山通用锁具有限公司 | Door lock handle mechanism and door body |
-
2020
- 2020-05-15 CN CN202010413280.4A patent/CN111472610B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN207194640U (en) * | 2017-08-09 | 2018-04-06 | 郑元和 | A kind of electronic lock |
CN207092733U (en) * | 2017-08-14 | 2018-03-13 | 永康市嘉图工业产品设计有限公司 | A kind of push-and-pull smart lock |
KR102062274B1 (en) * | 2018-09-07 | 2020-01-03 | 주식회사 엠에스씨엘 | Push-pull type digital door lock |
CN212376444U (en) * | 2020-05-15 | 2021-01-19 | 苏州琨山通用锁具有限公司 | Door lock handle mechanism and door body |
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CN111472610A (en) | 2020-07-31 |
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