CN211900125U

CN211900125U - Mute door lock

Info

Publication number: CN211900125U
Application number: CN202020261744.XU
Authority: CN
Inventors: 王景科; 廖翼鹏; 李政
Original assignee: Zhongshan Yongding Precision Hardware Technology Co ltd
Current assignee: Guangdong Yongding Technology Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-11-10
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses a silence lock, including casing, latch bolt and square bolt, the casing has an inner chamber and is linked together and supplies in the perforation that latch bolt and square bolt do concertina movement with the inner chamber respectively, is equipped with drive assembly including the intracavity, drive assembly is including ordering about the first transmission portion that the latch bolt does flexible activity and ordering about the second transmission portion that the square bolt does flexible activity, its characterized in that: the first transmission part comprises a first metal shifting sheet, a latch bolt pull rod and a latch bolt spring, the latch bolt pull rod is connected with the latch bolt, a flange is arranged at the end part of the latch bolt pull rod, which is far away from the latch bolt, the first metal shifting sheet is abutted against the flange and is positioned at the inner side surface, which is close to the latch bolt pull rod, a plastic guide block is riveted in the inner cavity, the latch bolt pull rod is penetrated through the plastic guide block, and the latch bolt spring is sleeved on the latch bolt pull rod and abutted between the plastic guide block and the latch bolt; the second transmission part comprises a second metal shifting sheet, a square tongue main plastic sliding block connected with a square tongue and a square tongue metal connecting rod.

Description

Mute door lock

Technical Field

The utility model relates to a silence lock.

Background

At present, in the door lock used in the household field in the market, the latch bolt component is usually made of metal materials, and when the door is opened or closed, noise can be generated due to impact or friction among all the parts. With the increase of the consumption level of people, the noise is hoped to be reduced as much as possible in office places or home occasions. A number of inventors have proposed corresponding solutions from different technical perspectives. The common solution is to improve the parts which directly slow down the impact of the bolt or contact around the bolt starting from the bolt which is most easy to generate the impact, but the noise generated by the impact or friction of most latch bolt components due to metal materials cannot be solved.

SUMMERY OF THE UTILITY MODEL

To the defect that above-mentioned prior art exists, the to-be-solved technical problem of the utility model is: the silent door lock can reduce the noise of the latch bolt assembly caused by the impact or friction of metal material, and has simple and firm structure, low cost and suitability for mass production.

A silent door lock comprises a shell, an oblique tongue and a square tongue, wherein the shell is provided with an inner cavity and a through hole which is respectively communicated with the inner cavity and used for the oblique tongue and the square tongue to do telescopic motion, a transmission assembly is arranged in the inner cavity and comprises a first transmission part driving the oblique tongue to do telescopic motion and a second transmission part driving the square tongue to do telescopic motion, the first transmission part comprises a first metal shifting piece, an oblique tongue pull rod connected with the oblique tongue and an oblique tongue spring, a flange is arranged at the end part of the oblique tongue pull rod far away from the oblique tongue, the first metal shifting piece is abutted against the flange and is positioned at the inner side surface close to the oblique tongue pull rod, a plastic guide block is riveted in the inner cavity, the oblique tongue pull rod is arranged on the plastic guide block in a penetrating manner, and the oblique tongue spring is sleeved on the oblique tongue pull rod and abutted between the plastic guide block and the oblique tongue;

the second transmission part comprises a second metal shifting sheet, a square tongue main plastic sliding block connected with a square tongue and a square tongue metal connecting rod; one end of the square tongue metal connecting rod is hinged to the second metal shifting piece, a first movable groove is formed in the square tongue metal connecting rod, and a first fixed shaft is arranged in the first movable groove and located on one side of the square tongue main plastic sliding block.

Further, the inner cavity internal rotation is provided with the nylon shifting block, nylon shifting block tip has first square hole, and its lateral wall has the installation cavity that is linked together with first square hole, first metal plectrum sets up in the installation cavity, first metal plectrum corresponds first square hole and is equipped with the square hole of second, the nylon shifting block is located to the second metal plectrum cover, be equipped with the second fixed axle in the inner cavity, the cover is equipped with first torsional spring on the second fixed axle, first torsional spring tip supports and holds in the nylon shifting block so that its rotation resets.

Furthermore, the second metal shifting piece and the square tongue metal connecting rod are provided with a plurality of first salient points, and the first salient points are abutted against the wall surface of the inner cavity.

Furthermore, a first silent plastic sleeve is arranged between the through hole and the latch bolt.

Further, a second silent plastic sleeve is arranged between the through hole and the square tongue.

Furthermore, a soft elastic O-shaped rubber ring is sleeved on the latch pull rod and arranged between the plastic guide block and the end part of the latch pull rod far away from the latch.

Furthermore, the main plastic sliding block of square tongue side wall surface interval is equipped with the concave position, be equipped with third fixed axle and fourth fixed axle in the inner chamber respectively, main plastic sliding block of square tongue one side is equipped with the vice metal sliding block of square tongue, the vice metal sliding block of square tongue is equipped with one and is used for contradicting the fixture block at the concave position, it is equipped with second activity groove and third activity groove respectively to correspond third fixed axle and fourth fixed axle on the vice metal sliding block of square tongue, the second activity groove with the third activity groove syntropy sets up, the third fixed axle sets up at second activity inslot, the fourth fixed axle sets up at third activity inslot to make the vice metal sliding block of square tongue order about the fixture block along the activity of second activity groove length and contradict and separate with the concave position.

Furthermore, a plurality of second salient points are arranged on the square tongue pair metal sliding block, and the second salient points are abutted against the wall surface of the inner cavity.

Furthermore, a manganese steel jacket is sleeved on the nylon shifting head at the position where the nylon shifting head abuts against the first torsion spring.

To sum up, the utility model discloses for its beneficial effect of prior art is:

the utility model discloses simple structure, each part through first drive division and each part of second drive division adopt working of plastics and metalwork to combine the complex form, through the frictional form of plastics in order to reduce the noise that produces because of metal material's striking or friction, and adopt the metalwork on main drive division in order to reach when firm in structure, a plurality of metal bump on the metal part and the inner chamber wall of casing pass through the form of point contact, in order to reach and alleviate frictional force, the effect of making an uproar falls, manufacturing cost is reduced, be applicable to mass production; and the flexible elastic O-shaped rubber ring is used for damping the movement, shock absorption and silencing of the latch pull rod and a flange arranged at the end part of the latch pull rod.

Drawings

Fig. 1 is one of schematic structural diagrams of a silent door lock according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a silent door lock according to an embodiment of the present invention;

fig. 3 is a third schematic structural diagram of a silent door lock according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a nylon shifting block according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a first metal shifting piece according to an embodiment of the present invention.

Detailed Description

The invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings:

as shown in fig. 1 to 5, an embodiment of the present invention preferably provides a silent door lock, which includes a housing 1, a latch bolt 2 and a latch bolt 3, wherein the housing 1 has an inner cavity 4 and a through hole 5 respectively communicating with the inner cavity 4 and allowing the latch bolt 2 and the latch bolt 3 to perform a telescopic motion, a transmission assembly is disposed in the inner cavity 4, the transmission assembly includes a first transmission portion 6 for driving the latch bolt 2 to perform a telescopic motion and a second transmission portion 7 for driving the latch bolt 3 to perform a telescopic motion, the first transmission portion 6 includes a first metal shifting piece 8, a latch bolt pull rod 9 connected to the latch bolt 2, and a latch bolt spring 10, a flange 35 is disposed at an end of the latch bolt pull rod 9 away from the latch bolt 2, the first metal shifting piece 8 abuts against the flange 35 and is located near an inner side of the latch bolt pull rod 9, a plastic guide block 11 is riveted in the inner cavity 4, the latch bolt pull rod 9 is inserted into the plastic guide block 11, the latch bolt spring 10 is sleeved on the latch bolt pull rod 9 and abutted between the plastic guide block 11 and the latch bolt 2, the acting force of the latch bolt spring 10 keeps the latch bolt 2 in a state of extending out of the through hole 5, and the first metal shifting piece 8 rotates the abutting flange 35 to enable the latch bolt pull rod 9 to move towards the inner cavity 4, so that the flexible movement of the latch bolt 2 is realized, and meanwhile, the latch bolt pull rod 9 is penetrated in the plastic guide block 11, and the noise generated when the latch bolt pull rod 9 moves and rubs is reduced through friction with the plastic; and a moon-shaped rubber piece is rotatably arranged in the middle of the oblique tongue 2 so as to reduce the friction of the oblique tongue 2.

The second transmission part 7 comprises a second metal shifting sheet 12, a square tongue main plastic sliding block 13 connected with the square tongue 3 and a square tongue metal connecting rod 14; one end of the square tongue metal connecting rod 14 is hinged to the second metal shifting piece 12, a first movable groove 15 is formed in the square tongue metal connecting rod, one side of the square tongue main plastic sliding block 13 is located in the first movable groove 15, a first fixed shaft 16 is arranged in the first movable groove 15, the second metal shifting piece 12 rotates to be in linkage fit with the square tongue metal connecting rod 14, so that the square tongue main plastic sliding block 13 is controlled to move, the square tongue 3 is driven to stretch and move, meanwhile, friction impact noise caused by the fact that the first movable groove 15 in the square tongue metal connecting rod 14 is matched with the first fixed shaft 16 of the square tongue main plastic sliding block 13 is generated, noise reduction is achieved through friction and impact with a plastic part of the square tongue main plastic sliding block 13, and the effects of noise reduction are achieved.

A nylon shifting block 17 is rotatably arranged in the inner cavity 4, a first square inner hole 18 is formed in the end part of the nylon shifting block 17, an installation cavity 19 communicated with the first square inner hole 18 is formed in the outer side wall of the nylon shifting block, the first metal shifting piece 8 is arranged in the installation cavity 19, a second square inner hole 20 is formed in the first metal shifting piece 8 corresponding to the first square inner hole 18, the second metal shifting piece 12 is sleeved on the nylon shifting block 17, a second fixing shaft 21 is arranged in the inner cavity 4, a first torsion spring 22 is sleeved on the second fixing shaft 21, and the end part of the first torsion spring 22 abuts against the nylon shifting block 17 to enable the nylon shifting block to rotate and reset; the mounting cavity 19 is internally provided with a straight groove and a notch which runs through the periphery of the mounting cavity 19 and is positioned on the nylon shifting block 17, the first metal shifting block 8 is respectively provided with a fixed cylinder and a hook part corresponding to the straight groove and the notch, so that when the fixed cylinder of the first metal shifting block 8 moves along the straight groove, the hook part of the first metal shifting block 8 is hooked in the notch, the first metal shifting block 8 is installed and arranged in the mounting cavity 19, the second square inner hole 20 of the first metal shifting block 8 is aligned with the first square inner hole 18, the mounting is convenient, the nylon shifting block 17 is driven to rotate by the driving of the nylon shifting block, the purpose of rotating the first metal shifting block 8 and the second metal shifting block 12 is achieved, the transmission work of the first transmission part 6 and the second transmission part 7 is realized respectively, and the friction noise generated by the collision of the nylon shifting block 17 with the wall surface of the shell 1 when the nylon shifting block rotates can be effectively reduced.

The second metal plectrum 12 with square tongue metal connecting rod 14 all has the first bump 23 of a plurality of, first bump 23 is contradicted in inner chamber 4 wall, through the form of the first bump 23 of a plurality of metal and the inner chamber 4 wall of casing 1 through the point contact to reach the produced noise of having avoided intermetallic striking friction, realized the effect of making an uproar, the effect of making an uproar falls in the amortization, and the manufacturing cost has been reduced, is applicable to mass production.

A first silent plastic sleeve 24 is arranged between the through hole 5 and the oblique tongue 2, so that the noise of the movable friction of the oblique tongue 2 is reduced, and the effects of noise reduction and noise reduction are achieved.

And a second silent plastic sleeve 25 is arranged between the through hole 5 and the square tongue 3, so that the noise generated by the movable friction of the square tongue 3 is reduced, and the effects of noise reduction and noise reduction are realized.

The latch bolt pull rod 9 is sleeved with a soft elastic O-shaped rubber ring 26, the soft elastic O-shaped rubber ring 26 is arranged between the plastic guide block 11 and the end part of the latch bolt pull rod 9 far away from the latch bolt 2, so that impact or friction noise generated when the latch bolt pull rod 9 is driven to move by the first metal shifting piece 8 is reduced, the effects of noise reduction and noise reduction are achieved, and the soft elastic O-shaped rubber ring 26 is made of rubber or a nitrile rubber ring and the like.

The square tongue main plastic sliding block 13 is provided with concave positions 27 on one side wall surface at intervals, a third fixed shaft 28 and a fourth fixed shaft 29 are respectively arranged in the inner cavity 4, a square tongue auxiliary metal sliding block 30 is arranged on one side of the square tongue main plastic sliding block 13, a clamping block 31 for abutting against the concave positions 27 is arranged on the square tongue auxiliary metal sliding block 30, a second movable groove 32 and a third movable groove 33 are respectively arranged on the square tongue auxiliary metal sliding block 30 corresponding to the third fixed shaft 28 and the fourth fixed shaft 29, the second movable groove 32 and the third movable groove 33 are arranged in the same direction, the third fixed shaft 28 is arranged in the second movable groove 32, the fourth fixed shaft 29 is arranged in the third movable groove 33, so that the square tongue auxiliary metal sliding block 30 movably drives the clamping block 31 to abut against and separate from the concave positions 27 along the length of the second movable groove 32, and the square tongue main plastic sliding block 13 is movably locked by driving the square tongue auxiliary metal sliding block 30 to move, the clamping block 31 of the square tongue auxiliary metal sliding block 30 is in movable interference fit with the concave position 27 of the square tongue main plastic sliding block 13, so that the noise generated by the impact or friction of metal materials is reduced through a plastic friction mode.

The auxiliary square tongue metal slider 30 is provided with a plurality of second salient points 34, the second salient points 34 are abutted against the wall surface of the inner cavity 4, and the second salient points 34 are in point contact with the wall surface of the inner cavity 4 of the shell 1, so that noise generated by metal impact friction is avoided, the effects of noise reduction and noise reduction are realized, the production cost is reduced, and the auxiliary square tongue metal slider is suitable for mass production.

The nylon shifting head 17 is sleeved with a manganese steel jacket 36 at a position where the nylon shifting head 17 abuts against the first torsion spring 22, and the manganese steel jacket 36 abuts against the first torsion spring 22, so that the friction damage of the first torsion spring 22 to the nylon shifting head 17 is reduced.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, and it should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only illustrative of the principles of the present invention, and the present invention can be modified in various ways without departing from the spirit and scope of the present invention, and these modifications and changes fall into the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a silence lock, includes casing, latch bolt and square bolt, the casing has an inner chamber and is linked together and supplies to make telescopic motion's perforation in latch bolt and square bolt with the inner chamber respectively, is equipped with drive assembly including the intracavity, drive assembly is including ordering about the first transmission portion that the latch bolt did flexible activity and ordering about the second transmission portion that the square bolt did flexible activity, its characterized in that: the first transmission part comprises a first metal shifting sheet, a latch bolt pull rod and a latch bolt spring, the latch bolt pull rod is connected with the latch bolt, a flange is arranged at the end part of the latch bolt pull rod, which is far away from the latch bolt, the first metal shifting sheet is abutted against the flange and is positioned at the inner side surface, which is close to the latch bolt pull rod, a plastic guide block is riveted in the inner cavity, the latch bolt pull rod is penetrated through the plastic guide block, and the latch bolt spring is sleeved on the latch bolt pull rod and abutted between the plastic guide block and the latch bolt;

2. A silent door lock according to claim 1, wherein: the inner chamber internal rotation is provided with the nylon shifting block, nylon shifting block tip has first square hole, and its lateral wall has the installation cavity that is linked together with first square hole, first metal plectrum sets up in the installation cavity, first metal plectrum corresponds first square hole and is equipped with the square hole of second, the nylon shifting block is located to the second metal plectrum cover, be equipped with the second fixed axle in the inner chamber, the cover is equipped with first torsional spring on the second fixed axle, first torsional spring tip supports and holds in the nylon shifting block so that its rotation resets.

3. A silent door lock according to claim 1, wherein: the second metal shifting piece and the square tongue metal connecting rod are provided with a plurality of first salient points, and the first salient points are abutted against the wall surface of the inner cavity.

4. A silent door lock according to claim 1, wherein: a first silent plastic sleeve is arranged between the through hole and the oblique tongue.

5. A silent door lock according to claim 1, wherein: a second silent plastic sleeve is arranged between the through hole and the square tongue.

6. A silent door lock according to claim 1, wherein: the oblique tongue pull rod is sleeved with a soft elastic O-shaped rubber ring, and the soft elastic O-shaped rubber ring is arranged between the plastic guide block and the end part of the oblique tongue pull rod, which is far away from the oblique tongue.

7. A silent door lock according to claim 1, wherein: the square tongue main plastic sliding block is characterized in that concave positions are arranged on one side wall surface of the square tongue main plastic sliding block at intervals, a third fixing shaft and a fourth fixing shaft are arranged in the inner cavity respectively, a square tongue auxiliary metal sliding block is arranged on one side of the square tongue main plastic sliding block, a clamping block used for abutting against the concave positions is arranged on the square tongue auxiliary metal sliding block, a second movable groove and a third movable groove are arranged on the square tongue auxiliary metal sliding block corresponding to the third fixing shaft and the fourth fixing shaft respectively, the second movable groove and the third movable groove are arranged in the same direction, the third fixing shaft is arranged in the second movable groove, and the fourth fixing shaft is arranged in the third movable groove so that the square tongue auxiliary metal sliding block can drive the clamping block to abut against and separate from the concave positions along the length of the second movable groove.

8. A silent door lock according to claim 7, wherein: and the square tongue pair metal sliding block is provided with a plurality of second salient points, and the second salient points are abutted against the wall surface of the inner cavity.

9. A silent door lock according to claim 2, wherein: and a manganese steel jacket is sleeved on the nylon shifting head at the position where the nylon shifting head abuts against the first torsion spring.