CN110984700A

CN110984700A - Mute door lock

Info

Publication number: CN110984700A
Application number: CN201911298319.6A
Authority: CN
Inventors: 陈贤栋
Original assignee: Wenzhou Huayili Hardware Decoration Co ltd
Current assignee: Wenzhou Huayili Hardware Decoration Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-04-10

Abstract

The invention belongs to the technical field of door locks, in particular to a silent door lock, which comprises a shell, wherein a spring bolt which can extend out of the shell and a spring bolt driving piece which is used for controlling the spring bolt to stretch out and draw back are arranged in the shell, a driving rod which can be matched with the spring bolt to work is formed on the spring bolt driving piece, a long rod which extends into the shell and penetrates through the bottom end of the driving rod is formed at the rear end of the spring bolt, the silent door lock is characterized in that a silencing linkage piece which can be pushed by the driving rod is arranged on the long rod, the silencing linkage piece comprises a first clamping plate and a second clamping plate which are positioned at two sides of the driving rod, a baffle plate positioned at the upper end of the driving rod is formed between the first clamping plate and the second clamping plate, an accommodating groove for accommodating the driving rod is. The mute door lock can keep complete mute in the working process, and a quiet working and living environment is provided for a user.

Description

Mute door lock

Technical Field

The invention belongs to the technical field of door locks, and relates to a mute door lock.

Technical Field

With the continuous development of door lock technology, the functional requirements of people on the door lock are not only limited to opening and closing the door any more, and more times, in order to live and work in a quieter environment, people have more silent requirements on the functions of the door lock, but the existing door lock is difficult to completely silence.

As shown in fig. 1, the conventional door lock with a driving part 1a of the lock tongue is connected with a long rod 2a extending into the casing on the lock tongue, the long rod 2a passes through the lower end of a driving rod 3a formed on the driving part 1a of the lock tongue, and is sleeved with a linkage plate 4a abutting against the rear end of the driving rod 3a, the end of the long rod 2a is further formed with a convex circle 5a for preventing the linkage plate 4a from being separated, when the driving part 1a of the door lock rotates clockwise, the driving rod 3a can push the linkage plate 4a, the pushing plate 4a further applies thrust to the convex circle 5a, so that the long rod 2a drives the lock tongue to retract into the casing, and finally the door opening effect is achieved. However, when the driving piece 1a rotates anticlockwise, the driving rod 3a resets, because the long rod 01 is sleeved with the first spring 6a which can be compressed when the lock tongue retracts, the first spring 6a starts to rebound after the driving rod 3a resets and pushes the lock tongue out of the shell again, the long rod 2a also drives the linkage plate 4a to reset through the convex circle 5a in the process of moving along with the lock tongue, and in the process of resetting the linkage plate 4a, the linkage plate 4a finally collides with the driving rod 3a and finally makes a sound. That is, in the closing process of the door lock, the door lock can generate noise to influence people, which is a common defect of the traditional door lock.

In order to improve the above disadvantages, a door lock has been developed which can prevent the linkage plate 4a from colliding with the driving rod 3a, thereby achieving a silent effect. As shown in fig. 2, a long rod 2a connected with a lock tongue in the door lock shell is provided with a terminal convex circle 5a, the rear end of a linkage plate 4a is additionally provided with a second spring 7a which is sleeved at the terminal of the long rod 2a and clings to the inner wall of the shell side, when a driving rod 3a rotates along with a lock tongue driving piece 1a to push the linkage plate 4a to move, the linkage plate 4a can compress the second spring 7a, when the driving rod 3a starts to reset, the compressed spring 6a can rebound along with the driving rod 3a and push the linkage plate 4a, so that the linkage plate 4a clings to the driving rod 3a in the resetting process all the time, namely the linkage plate 4a cannot collide with the driving rod 3a all the time, and the noise of the door lock at the closing position is eliminated. However, in order to effectively push the linkage plate 4a to reset by the second spring 7a and avoid noise generated by friction between the second spring 7a and the long rod 2a, the second spring 7a needs to have a sufficiently large diameter. However, the second spring 7a with a larger diameter contacts with the inner bottom surface of the housing when being installed inside the housing, that is, the second spring 7a generates friction with the inner bottom surface of the housing in the process of extension and retraction, and also generates noise, so that the door lock still cannot well solve the problem that the door lock generates noise in the use process, and certain defects still exist.

Aiming at the problems, the door lock which can completely eliminate the noise generated by the door lock in the using process can be designed.

Disclosure of Invention

The invention provides a mute door lock according to the problems, which can achieve the effect of completely keeping mute in the using process and provide a quieter working and living environment for people.

The purpose of the invention is realized as follows:

a silent door lock comprises a shell, a lock tongue which can extend out of the shell and a lock tongue driving piece which is used for controlling the expansion of the lock tongue, wherein a driving rod which can work in cooperation with the lock tongue is formed on the lock tongue driving piece, a long rod which extends into the shell and penetrates through the bottom end of the driving rod is formed at the rear end of the lock tongue, the silent door lock is characterized in that a silencing linkage piece which can be pushed by the driving rod is installed on the long rod and comprises a first clamping plate and a second clamping plate which are positioned at two sides of the driving rod, a baffle plate positioned at the upper end of the driving rod is formed between the first clamping plate and the second clamping plate, a containing groove for containing the driving rod is limited by the first clamping plate, the second clamping plate and the baffle plate, a convex circle which is matched with the silencing linkage piece is further formed at the tail end of the long rod, and a limit stop block positioned at the front end of the, the long rod is sleeved with a return spring between the lock tongue and the limit stop, and the return spring enables the lock tongue to have a trend of extending out of the shell.

Furthermore, the first clamping plate and the second clamping plate are both provided with connecting through holes for the long rod to pass through.

Further, the diameter of the connecting through hole is larger than that of the long rod.

Furthermore, a supporting convex body positioned in the accommodating groove is formed in the middle of the baffle plate, and the supporting convex body is positioned at the bottom end of the driving rod.

Furthermore, an arc-shaped groove matched with the long rod is formed on the supporting convex body.

Furthermore, the two ends of the second clamping plate are both provided with sliding convex bodies, and sliding grooves matched with the sliding convex bodies are formed on the inner bottom surface of the shell.

Further, the width of the sliding groove is larger than that of the sliding convex body.

Furthermore, the long rod is sleeved with a silencing washer positioned between the silencing linkage piece and the convex circle.

Further, the diameter of the convex circle is smaller than the height of the silencing linkage piece.

Furthermore, a gap is reserved between the return spring and the inner bottom surface of the shell.

Compared with the prior art, the invention has the outstanding and beneficial technical effects that:

1. because the silencing linkage piece is accommodated in the accommodating groove through the driving rod, no matter the driving rod pushes the silencing linkage piece to move backwards or the driving rod pushes the silencing linkage piece to reset, no collision is generated between the driving rod and the silencing linkage piece, namely no sound is generated, so that the door lock can be completely in a silencing state in the use process, and no noise influencing the work and life of people is generated.

2. Not only can the collision sound not produce between actuating lever and the amortization linkage piece, the actuating lever does not also send the collision sound with other parts in the amortization linkage piece in the in-process that removes in the casing yet, can accomplish absolute silence.

3. Other parts in the door lock except the driving rod and the silencing linkage piece can not make sound in the working process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a conventional door lock.

Fig. 2 is a schematic diagram of an internal structure of a conventional silent door lock.

Fig. 3 is a first schematic diagram of the internal structure of the present invention.

Fig. 4 is a schematic diagram of the internal structure of the present invention.

Fig. 5 is a perspective view of the muffling linkage.

1 a-spring bolt driving piece, 2 a-long rod, 3 a-driving rod, 4 a-linkage plate, 5 a-convex circle, 6 a-first spring, 7 a-second spring, 1-shell, 11-limit stop, 12-sliding groove, 2-spring bolt, 21-long rod, 211-convex circle, 3-spring bolt driving piece, 31-driving rod, 4-silencing linkage piece, 41-first clamping plate, 411-connecting through hole, 42-second clamping plate, 421-sliding convex body, 43-baffle plate, 431-supporting convex body, 432-arc groove, 44-accommodating groove, 5-reset spring and 6-silencing washer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The invention will be further described in the following with reference to specific embodiments thereof,

as shown in fig. 3-5, a silent door lock includes a housing 1, a bolt 2 installed in the housing 1 and capable of extending out of the housing 1, and a bolt driving member 3 for controlling the bolt 2 to extend and retract, a driving rod 31 formed on the bolt driving member 3 and capable of cooperating with the bolt 2, a long rod 21 formed at the rear end of the bolt 2 and extending into the housing 1 and passing through the bottom end of the driving rod 31, wherein a silencing linkage member 4 capable of being pushed by the driving rod 31 is installed on the long rod 21, the silencing linkage member 4 includes a first clamping plate 41 and a second clamping plate 42 located at both sides of the driving rod 31, a blocking plate 43 located at the upper end of the driving rod 31 is formed between the first clamping plate 41 and the second clamping plate 42, the first clamping plate 41, the second clamping plate 42 and the blocking plate 43 define an accommodating slot 44 for accommodating the driving rod 31, the tail end of the long rod 21 is further provided with a convex circle 211 matched with the silencing linkage piece 4, a limit stop 11 positioned at the front end of the silencing linkage piece 4 is further formed in the shell, the long rod 21 is sleeved with a return spring 5 positioned between the lock tongue 2 and the limit stop 11, and the return spring 5 enables the lock tongue 2 to have a tendency of extending out of the shell 1. Specifically, when the latch driving element 3 rotates clockwise, the driving rod 31 rotates along with the latch driving element, and the first clamping plate 41 pushes the silencing linkage member 4 to move backwards, the silencing linkage member 4 applies a pushing force to the convex circle 211 in the moving process, so that the long rod 21 moves along with the latch driving element, the latch 2 retracts into the latch shell 1 along with the movement of the long rod 21, the door opening effect is finally realized, and at the moment, the return spring 5 is compressed by the latch 2 in the shell 1. When the driving tongue piece 3 rotates counterclockwise, the driving rod 31 rotates and pushes the silencing linkage piece 4 to move forward through the second clamping plate 42, at this time, as the silencing linkage piece 4 resets, the convex circle 211 no longer receives thrust, that is, the return spring 5 no longer receives pressure, the return spring 5 starts to rebound and pushes the locking tongue 2 to extend out of the shell 1 again, and the long rod 21 also resets accordingly. Because the silencing linkage piece 4 is always attached to the driving rod 31 in the rotating process of the driving rod 31, no collision sound is generated between the driving rod 31 and the silencing linkage piece 4, and the noise is eliminated in the using process of the silencing door lock.

As shown in fig. 5, the first clamping plate 41 and the second clamping plate 42 are formed with a connecting through hole 411 for the long rod 21 to pass through. Specifically, the long rod 21 is connected to the silencing linkage piece 4 by passing through the first connecting through hole 411, so that the silencing linkage piece 4 can drive the long rod 21 to move in the moving process.

Further, the diameter of the connecting through hole 411 is larger than that of the long rod 21. Specifically, the design can prevent the long rod 21 from generating friction with the inner wall of the connecting through hole 411 during the moving process, so as to generate noise, and further realize the silencing effect.

As shown in fig. 3 to 5, a supporting protrusion 431 is formed at the middle of the blocking plate 43 and located in the receiving groove 44, and the supporting protrusion 431 is located at the bottom end of the driving rod 31. Specifically, a supporting protrusion 431 located in the receiving groove 44 is formed at the middle of the blocking plate 43, and the supporting protrusion 431 is located at the bottom end of the driving rod 31.

As shown in fig. 5, the supporting protrusion 431 is formed with an arc-shaped groove 432 to be fitted with the long bar 21. Specifically, since the long rod 21 passes through the accommodating groove 44 after entering the connecting through hole 411, the arc-shaped groove 432 can prevent the long rod 21 from rubbing against the supporting protrusion 431 during the moving process, and can further achieve the silencing effect.

As shown in fig. 3 to 5, sliding protrusions 421 are formed at both ends of the second clamping plate 42, and sliding grooves 12 matched with the sliding protrusions 421 are formed on the inner bottom surface of the housing 1. Specifically, when the driving rod 31 pushes the silencing linkage member 4 to move, the sliding groove 12 limits the silencing linkage member 4 through the sliding protrusion 421, and the silencing linkage member 4 makes a linear reciprocating motion in the sliding groove 12 through the sliding protrusion 421.

Further, the width of the sliding groove 12 is greater than the width of the sliding protrusion 421. Specifically, the design can prevent the sliding convex body 421 from rubbing against the inner wall of the sliding groove 12 when moving, so as to generate noise, and effectively prevent the noise generated when the silent door lock works.

As shown in fig. 3-4, the long rod 21 is sleeved with a silencing washer 6 between the silencing linkage 4 and the convex circle 211. Specifically, the silencing washer 6 is made of rubber materials, so that the convex circle 211 can be prevented from colliding with the silencing linkage piece 4 when the long rod 21 is reset, and noise generated when the silencing door lock is closed can be effectively eliminated.

Further, the diameter of the convex circle 211 is smaller than the height of the noise damping linkage 4. Specifically, in the moving process of the long rod 21, the design can avoid friction between the convex circle 211 and the inner bottom surface of the shell 1, so that noise is generated, and the long rod 21 is subjected to mute processing in the moving process.

Furthermore, a gap is reserved between the return spring 5 and the inner bottom surface of the shell 1. Specifically, the design can prevent the reset spring 5 from rubbing against the inner bottom surface of the shell 1 in the process of stretching, and noise generated by the reset spring 5 in the process of stretching is eliminated.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A silent door lock comprises a shell (1), a bolt (2) which can extend out of the shell (1) and a bolt driving piece (3) which is used for controlling the bolt (2) to stretch out and draw back are arranged in the shell (1), a driving rod (31) which can work with the bolt (2) in a matching way is formed on the bolt driving piece (3), the rear end of the bolt (2) is provided with a long rod (21) which extends into the shell (1) and penetrates through the bottom end of the driving rod (31), the silent door lock is characterized in that a silencing linkage piece (4) which can be pushed by the driving rod (31) is arranged on the long rod (21), the silencing linkage piece (4) comprises a first clamping plate (41) and a second clamping plate (42) which are positioned at two sides of the driving rod (31), a baffle plate (43) which is positioned at the upper end of the driving rod (31) is formed between the first clamping plate (41) and the second clamping plate, first splint (41), second splint (42) and baffle (43) are injectd and are used for holding receiving groove (44) of actuating lever (31), stock (21) end still be formed with amortization linkage (4) matched with protruding circle (211), still be formed with in the casing and be located spacing block (11) of amortization linkage (4) front end, the cover has on stock (21) is located reset spring (5) between spring bolt (2) and spacing block (11), reset spring (5) make spring bolt (2) have to the outside trend that stretches out of casing (1).

2. The silent door lock according to claim 1, wherein said first clamping plate (41) and said second clamping plate (42) are formed with a connecting through hole (411) for said long rod (21) to pass through.

3. The silent door lock according to claim 2, wherein the diameter of the through-hole (411) is larger than the diameter of the long rod (21).

4. The silent door lock according to claim 1, wherein the blocking plate (43) is formed at the middle thereof with a supporting protrusion (431) located in the receiving groove 44, the supporting protrusion (431) being located at the bottom end of the driving lever (31).

5. The silent door lock according to claim 4, wherein said supporting protrusion (431) is formed with an arc-shaped groove (432) which is engaged with said long rod (21).

6. The silent door lock according to claim 1, wherein said second clamping plate (42) has sliding protrusions (421) formed at both ends thereof, and said housing (1) has sliding grooves (12) formed on the inner bottom surface thereof for engaging with said sliding protrusions (421).

7. The silent door lock according to claim 6, characterized in that the width of said sliding groove (12) is greater than the width of said sliding protrusion (421).

8. A silent door lock according to claim 1, wherein said long rod (21) is sleeved with a silencing washer (6) between said silencing linkage (4) and said convex circle (211).

9. A silent door lock according to claim 1, characterized in that the diameter of the convex circle (211) is smaller than the height of the silent linkage (4).

10. A silent door lock according to claim 1, characterized in that there is a gap between the return spring (5) and the inner bottom surface of the housing (1).