CN108590373B

CN108590373B - Chain window lock

Info

Publication number: CN108590373B
Application number: CN201810538492.8A
Authority: CN
Inventors: 徐碧正
Original assignee: Shenzhen Haoyifeng Electromechanical Co ltd
Current assignee: Shenzhen Haoyifeng Electromechanical Co ltd
Priority date: 2018-05-30
Filing date: 2018-05-30
Publication date: 2023-11-10
Anticipated expiration: 2038-05-30
Also published as: CN108590373A

Abstract

The utility model provides a chain window lock, includes upper cover subassembly, lower cover subassembly, handle subassembly, worm wheel subassembly and locking closure, upper cover subassembly is installed in lower cover subassembly top, and locking closure detachably installs on upper cover subassembly, and the handle subassembly passes the perforation that sets up on the locking closure and inserts in the upper cover subassembly, and worm wheel subassembly sets up on the upper cover subassembly. The chain lock is divided into a chain lock core and a chain lock cover, after the lock core is assembled on a window, the lock cover is covered by the color cover of the matched window, a handle is arranged, the handle is easy to pull out, and the operation is particularly convenient; the handle is convenient to retract and open. The assembly can be assembled on a flat-open window, is particularly suitable for a push-pull window formed by aluminum alloy, plastic steel alloy and other sectional materials, and has the advantages of simple and convenient assembly, attractive appearance and convenient shell replacement.

Description

Chain window lock

Technical Field

The application relates to a chain window lock.

Background

The chain window lock not only can provide safety protection, but also can leave proper space for ventilation, and has various advantages. When the window is used, the key is unscrewed when the window is opened, and the window is normally locked to ensure safety, so that the switch is not affected. However, the existing chain window locks have some problems, wherein the main problems include inconvenient installation, inability of adapting to various types of windows in appearance or color, troublesome use and operation and inconvenient popularization and application.

Disclosure of Invention

In view of the above, in order to solve the problems of the above-mentioned technologies, the present application proposes a chain window lock including an upper cover assembly installed above a lower cover assembly, a handle assembly inserted into the upper cover assembly through a penetration hole provided in the lock cover, a worm wheel assembly provided on the upper cover assembly, and a locking cover detachably installed on the upper cover assembly; the upper cover assembly comprises an upper cover, a worm wheel fixing seat and a locking head, wherein the worm wheel fixing seat is fixedly arranged on the upper cover, and the locking head is arranged on the upper cover in parallel and is positioned at one side of the worm wheel fixing seat; the worm wheel assembly comprises a worm wheel, a worm wheel cap, a wave post, a spring and a worm wheel sleeve, wherein the worm wheel cap is fixed at the top of the worm wheel fixing seat, the worm wheel cap is sleeved on the head of the worm wheel, 2 wave post hole sites are arranged on one end of the worm wheel assembly close to the edge of the worm wheel fixing seat, after the wave post is arranged in the wave post hole on the worm wheel, the spring is arranged to press the wave post, then the worm wheel sleeve is additionally arranged outside the spring, a buckling position is arranged on the worm wheel sleeve, and the worm wheel sleeve is pressed into a groove of an outer ring of the worm wheel. The wave beam spring is thus fixed to the turbine. The wave column can stretch into the turbine hole after receiving the pressure, and protrudes out without being stressed; the handle component is detachably inserted into the worm wheel and is clamped in a groove on the shaft in front of the handle by the elastic force of the wave column; the lower cover assembly comprises a bottom shell, a chain tail positioner, a gear, chain teeth and a gear fixing seat, wherein the chain teeth are arranged on the gear, the chain is meshed with the chain teeth, one end of the chain is limited by the chain tail positioner to the maximum extension length of the chain, the bottom shell is provided with a fixed positioning end point and an adjustable positioning point limiting piece, and the other end of the chain extends out of the bottom shell to drive a window to be opened and closed; a locking ratchet disc is arranged above the chain teeth, the gears can be locked and immobilized through a locking connecting rod, a gear fixing seat is fixedly arranged below the chain teeth, and the gear fixing seat is arranged on the lower cover so that the gears can rotate more stably; the locking ratchet plate is provided with a gear which is meshed with the worm gear.

In the chain window lock according to an embodiment of the present application, preferably, the lower cover assembly further includes a chain guide rail scribe fixed on the bottom case for guiding the chain.

In the chain window lock according to the embodiment of the application, preferably, the gear is a helical gear, and teeth of the helical gear mesh with teeth of the worm gear.

In the chain window lock according to the embodiment of the present application, preferably, the handle assembly is provided with a handle, and the handle is inserted into the worm gear wave post hole; the handle is provided with a clamping groove, and the wave post buckles the clamping groove, so that the handle cannot fall off. The handle is clamped by the wave post in the worm wheel after being arranged in the worm wheel, the wave post clamps the semicircular groove on the handle, and the handle is well matched; a force of 5-10kg is required to withdraw the handle.

In the chain window lock according to the embodiment of the application, preferably, the lock head is provided with a lock head fixing seat and two lock head springs, the tail part of the lock head is provided with a tail elastic sheet, and the elastic sheet is clamped with the upper cover lock head Kong Weibu to fix the lock head fixing seat. After the lock head is arranged in the upper cover, the tail spring piece of the lock head clamps the upper cover, and the lock head is fixed in place; because the lock head fixing seat is provided with two lock head springs for supporting, a certain force is applied when the lock head fixing seat is pressed downwards.

In the chain window lock according to the embodiment of the application, preferably, the bottom shell is provided with an ejection spring. The locking cap can be easily removed. The upper cover is buckled on the hole position through the lock head fixing seat and is clamped into the round hole at the side edge, and the ejection spring on the lock body automatically ejects the lock cover when the lock body is buckled.

In the chain window lock according to the embodiment of the application, preferably, the upper cover is provided with a positioning bolt. The extension of the chain can be adjusted. The bolt is taken out, the chain is extended to a position of 120mm, the bolt is assembled, and the chain stops moving to the position. The handle is buckled on the outer ring of the handle through 2 wave posts, after the inner pin is pressed, the wave posts can roll into the inner pin of the handle, so that the outer ring of the handle can slide for 9mm, and the handle is easily bent.

In the chain window lock according to the embodiment of the present application, preferably, the bottom case is provided with two elongated mounting holes. After the lock body is installed, the lock cover is covered, and the surface is complete and beautiful. The sliding door lock is extremely convenient to install, and the sliding door lock can be safely assembled by only drilling holes in the door frame.

In the chain window lock according to the embodiment of the application, the chain can be guided to stretch and retract in the groove of the bottom shell through gear transmission.

In the chain window lock according to the embodiment of the application, the handle can be conveniently folded and easily operated.

After the technology provided by the application is adopted, the chain window lock has the beneficial effects that the chain window lock is divided into the chain lock core and the chain lock cover, after the lock core is assembled on a window, the lock cover is covered by the color of the matched window, the handle is arranged, the handle is easy to pull out, and the operation is particularly convenient; the handle is convenient to retract and open. The assembly can be assembled on a flat-open window, is particularly suitable for a push-pull window formed by aluminum alloy, plastic steel alloy and other sectional materials, and has the advantages of simple and convenient assembly, attractive appearance and convenient shell replacement.

According to the chain window lock provided by the embodiment of the application, the lock body is easy to install, and a layer of paint can be sprayed after the lock body is assembled, so that the appearance is not affected; the whole is beautiful, and the screw cap of the lock body cannot be seen; the lock cover is convenient to detach and replace.

According to the chain window lock, the volume is reduced, the weight is reduced, the efficiency is improved, and the strength is enhanced.

Drawings

FIG. 1 is an overall block diagram of a chain window lock according to the present application;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a block diagram of the upper cover assembly;

FIG. 4 is a block diagram of the lower cover assembly;

FIG. 5 is a block diagram of a lock cylinder;

FIG. 6 is a diagram of a worm gear structure;

FIG. 7 is a diagram of the handle and worm gear assembly;

FIG. 8 is a diagram showing the configuration of the worm gear, helical gear and chain teeth;

FIG. 9 is a perspective view of the worm gear and helical gear and the chain teeth engaged;

FIG. 10 is a view of the handle of FIG. 9 after installation;

FIG. 11 is a view showing the operation of a chain window lock according to the present application when the window is pushed open;

fig. 12 is a view showing an operation state when a chain window lock according to the present application closes a window.

Detailed Description

Various preferred embodiments of the present application will be described below with reference to the accompanying drawings. The following description is provided with reference to the accompanying drawings to assist in the understanding of the exemplary embodiments of the application as defined by the claims and their equivalents. It includes various specific details that aid in understanding, but they are to be considered exemplary only. Accordingly, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the application. Moreover, a detailed description of functions and configurations well known in the art will be omitted for the sake of clarity and conciseness of the present specification.

As shown in fig. 1 to 12, a chain window lock comprises an upper cover assembly 1, a lower cover assembly 2, a handle assembly 3, a worm wheel assembly 4 and a lock cover 5, wherein the upper cover assembly 1 is arranged above the lower cover assembly 2, the lock cover 5 is detachably arranged on the upper cover assembly 1, the handle assembly 3 is inserted into the upper cover assembly 1 through a through hole arranged on the lock cover 5, and the worm wheel assembly 4 is arranged on the upper cover assembly 1; the upper cover assembly 1 comprises an upper cover 10, a worm wheel fixing seat 11 and a lock head 12, wherein the worm wheel fixing seat 11 is fixedly arranged on the upper cover 10, and the lock head 12 is arranged on the upper cover 10 in parallel and is positioned on one side of the worm wheel fixing seat 11; the worm gear assembly 4 comprises a worm gear 41, a worm gear cap 42, a wave post 43, a spring 44 and a worm gear sleeve 45, wherein the worm gear cap 42 is fixed at the top of the worm gear fixing seat 11, the worm gear cap 42 is sleeved at the head of the worm gear 41, 2 wave post hole sites are formed in one end of the worm gear assembly close to the edge of the worm gear fixing seat 11, after the wave post 43 is arranged in the wave post hole on the worm gear, the spring 44 is arranged to press the wave post 43, then the worm gear sleeve 45 is additionally arranged outside the spring, and a buckling position is arranged on the worm gear sleeve 45 and is pressed into a groove of the outer ring of the worm gear. The wave beam spring is thus fixed to the turbine. The wave column can stretch into the turbine hole after receiving the pressure, and protrudes out without being stressed; the handle assembly 3 is detachably inserted into the worm gear 41 and is clamped in a groove on the shaft in front of the handle by the elastic force of the wave column; the lower cover assembly 2 comprises a bottom shell 20, a chain 21, a chain tail positioner 22, a gear 23, chain teeth 24 and a gear fixing seat 25, wherein the chain teeth 24 are arranged on the gear 23, the chain 21 is meshed with the chain teeth 24, one end of the chain 21 is limited to the maximum extension length of the chain through the chain tail positioner 22, the bottom shell 20 is provided with a fixed positioning end point and an adjustable positioning point limiting piece, and the other end of the chain 21 extends out of the bottom shell 20 to drive a window to be opened and closed; a locking ratchet plate is arranged above the chain teeth 24, the gears can be locked and immobilized through a locking connecting rod, a gear fixing seat 25 is fixedly arranged below the chain teeth, and the gear fixing seat 25 is arranged on a lower cover so that the gears can rotate more stably; the locking ratchet plate is provided with a gear 23, and the gear 23 is meshed with the worm gear 41.

The lower cover assembly 2 further includes a chain guide scribe 26, and the chain guide scribe 26 is fixed to the bottom case 20 for guiding the chain 21.

The gear 23 is a helical gear, and teeth of the helical gear mesh with teeth of the worm wheel 41.

The handle assembly 3 is provided with a handle 30, and the handle 30 is inserted into the wave column hole 46 of the worm wheel 41; the handle 30 is provided with a clamping groove, and the wave post buckles the clamping groove, so that the handle cannot fall off. After the handle 30 is arranged in the worm wheel 41, the handle is clamped by a wave post 43 in the worm wheel 41, the wave post 43 clamps a semicircular groove on the handle, and the handle is well matched; a force of 5-10kg is required to withdraw the handle.

The lock head 12 is provided with a lock head fixing seat 121 and two lock head springs 122, and the tail part of the lock head 12 is provided with a tail elastic sheet 123. The spring plate clamps the upper cover lock Kong Weibu and fixes the lock fixing seat. After the lock head 12 is assembled into the upper cover 10, the tail spring sheet of the lock head 12 clamps the upper cover 10, and the lock head 12 is fixed in place; because the lock cylinder fixing seat is supported by the two lock cylinder springs 122, a certain force is applied when the lock cylinder fixing seat is pressed downwards.

An ejector spring 27 is provided on the bottom case 20. The locking cap can be easily removed. The upper cover 10 is fastened on the hole through the lock head fixing seat and is clamped into the round hole at the side edge, and the ejection spring 27 on the lock body automatically ejects the lock cover 5 when the lock body is pressed.

The upper cover 10 is provided with a positioning latch 109. The extension of the chain can be adjusted. The latch 109 is removed, the chain 21 is extended to a 120mm position, the latch 109 is installed, and the chain 21 is stopped when it is moved to this position. The handle is buckled on the outer ring of the handle through 2 wave posts 43, after the inner pin is pressed, the wave posts 43 can roll into the inner pin of the handle, so that the outer ring of the handle can slide for 9mm, and the handle is easily bent.

Two elongated mounting holes 200 are provided in the bottom case 20. After the lock body is installed, the lock cover is covered, and the surface is complete and beautiful. The sliding door lock is extremely convenient to install, and the sliding door lock can be safely assembled by only drilling holes in the door frame.

According to the chain window lock of the application, the chain 21 can be guided to stretch and retract in the groove of the bottom shell 20 through gear transmission.

According to the chain window lock, the handle can be folded conveniently and operated easily.

The chain window lock has the following advantages:

the advantage 1. Lock body simple to operate, can fix after fine setting position.

The advantage 2. The locking cap can be changed different colours, and is whole elegant appearance.

The advantage 3, change locking closure structural design novel, convenient operation.

The advantage 4. The handle can be dismantled, and the installation is dismantled conveniently moreover.

The advantage 5. The handle is convenient to fold, easy to operate.

Its advantages are low weight, small size and constant strength. The safety coefficient is improved.

And the window opening and closing speed is high, and the efficiency is high.

According to the chain window lock, a bevel gear 23 transmission mode is adopted, when a handle rotates, a worm gear 41 rotates to drive the bevel gear 23 to transmit, the rotation of the gear 23 drives the rotation of a chain tooth 24, and the chain tooth 24 clamps the forward rotation and the reverse rotation of a chain 21; the function of the chain 21 for pushing the window to open and close the window is achieved.

The lock body of the chain 21 is assembled on the window and then the lock cover 5 is added, so that the appearance is beautiful, and the chain 21 can be rotated by being assembled into the handle. The handle is buckled by the matching of the handle and the worm wheel 41 through the clamping groove design of the wave post 43, and the handle is installed and pulled out very simply and conveniently. The worm wheel fixing seat 11 is made of zinc alloy material, so that the chain 21 is supported to the window with enough force when in transmission; the length of the chain 21 can be adjusted.

According to the chain window lock, the left side and the right side of the lock cover are provided with the hole sites, the left side and the right side of the lock body are buckled, the right side is provided with the open hole, the left side and the right side are buckled with the hole sites in a bouncing way when the lock cover is installed, the lock head fixing seat of the lock head assembly is also popped out by 2mm, the lock head hole on the lock cover is buckled, and the lock cover is ensured to be firmly matched with the lock body. The design of the right open hole of the lock cover is convenient for a user to push the elastic sheet of the lock body by a tool, and then the lock cover is ejected by the ejection spring.

The design of the lock head assembly can have 2 functions.

1. Switching lock bodies with different functions; the lock head assembly is assembled by the locking function; the lock cylinder assembly is not assembled without the lock-up function.

2. The lock cover with the locking function is clamped by the lock head fixing seat.

According to the chain window lock, the turbine component provides a clamping handle design function of the inner wave column through a unique design; the top of the turbine is provided with a turbine sleeve, and the turbine sleeve is made of plastic material and rotates smoothly when matched with the upper cover hole; the front of the turbine is provided with an inner turbine ring and an outer turbine ring which are matched with a turbine fixing seat, and the inner turbine ring is fixed on the turbine. The turbine inner ring has 2 functions: 1. the wave column and the spring inside the turbine are fixed; 2. the turbine inner ring and the turbine outer ring rotate mutually, and are flexible and free. The key point of the design is the function design of the wave column, a u groove is formed in a shaft of the handle, which is arranged in the turbine, and after the handle is arranged in, the wave column clamps the u groove, so that the handle can be pulled out by external force; the pulling-out force of the handle can be adjusted by adjusting the force of the wave column spring; after the handle is inserted into the turbine hole, the turbine hole is provided with 2 wave columns which are ejected out of the U-shaped groove on the clamping handle. The user can pull out with 5-10kg force when pulling out, and the pulling-out force can be adjusted by adjusting the force of the spring. The handle outer sleeve is internally provided with a U-shaped groove, the inner sleeve is provided with 2 Kong Fangbo column positions, and under normal conditions, the bolt pops out to just push the wave column into the U-shaped groove of the outer sleeve, so that the outer sleeve cannot be pulled out. The bolt is in an ejection state through the spring, the U-shaped groove is arranged on the bolt and can store the wave column position, the bolt is pressed, the wave column can roll into the bolt groove, the handle jacket is not buckled by the wave column any more, and the bolt can be pulled out by 9mm. In addition, the handle can be folded through the opening position on the zinc alloy handle.

According to the chain window lock, the design of the handle is also an important improvement point, and the key point is that the pressing pin controls the wave column to enter, so that the handle sleeve can be positioned and pulled out. The application has the design structure, and can be pulled out very conveniently; it is very easy to stow the handle. The pulling-out function is mainly to use the clamping function of the wave column; the handle has a pressing pin, and a u-groove is formed on the handle for guiding the wave column.

The spring is arranged in front of the pressing pin, the normal state is ejected, and the wave column cannot enter the groove of the pin; a groove is also arranged on the outer sleeve of the handle, 2 holes are arranged on the inner sleeve of the handle, and the wave column is just stored; the zinc alloy handle is connected with the handle inner sleeve by a bolt; the pressing pin is connected with the inner sleeve of the handle through a bolt; the important point is that after the pressing pin is ejected, the handle casing cannot be pulled out because the wave post blocks the groove of the handle casing.

According to the chain window lock, the weight and the size of a product are reduced from the safety of a user, and materials are replaced, but the strength of the product is not affected. On the other hand, from the safety of users, plastic materials are selected to be used, but when the turbine fixing seat is designed, the strength of the whole product is improved, the turbine fixing seat just props against the thrust of the chain, and the integral strength of the lock body is greatly improved.

The transmission design of the application not only ensures that the chain can be self-locked, but also improves unlocking efficiency; the double-groove turbine self-locking function has the advantages that the rotation speed is 2 times faster, the chain can be self-locked, namely, the chain can be discharged through manual rotation, but when the chain is pushed, the turbine is blocked by the gear; so that the window does not close automatically. The handle is inserted into the turbine hole, so that the turbine can be rigidly linked, the handle is rotated for one circle, the gear is rotated for 1/4 circle to rotate 6*1/4=3/2 teeth, 21 sections of teeth can be produced by 14 circles, the chain can be quickly stretched, and the use efficiency of a user is improved; the whole chain can be rotated for 14 turns, so that the efficiency is improved by 20%. In addition, because the chain is locked on the window, the chain is suspended in the high altitude too heavy, and potential safety hazards are caused; the application not only changes the material into plastic material, but also reduces the length by 25%, and the integral strength of the chain lock is not affected due to reasonable mechanical design. In particular to the design of a chain, the prior art is a double-piece chain, the design of the application adopts a single-piece chain and adopts the same chain joint, thus the processing is convenient and the rotation is smooth; the large groove is abutted with the small groove, and the wide edge is just matched with the narrow edge; the rings are buckled to form an efficient chain connecting piece.

The chain window lock is extremely convenient to install, and only 2 screws are needed to be fixed; the lock cover 5 is very convenient to detach; the customer can use the same lock body, and then can be matched with the lock cover 5 with any color according to the requirement; the operation is simple. The assembly of the locking cap 5 is very simple and is completed by simply pressing it down. The disassembly is very convenient, and the lock cover 5 can be ejected out by the spring 44 of the lock body as long as the elastic piece on the side is pressed by a screw driver; the lock cover 5 can be replaced by taking down the lock cover 5. The handle is convenient to operate, the handle can be taken down with 5-10kg force, the handle can be easily retracted, and the operation of a user is very simple.

According to the chain window lock, the chain 21 lock core and the chain 21 lock cover 5 are divided, after the lock core is assembled on a window, the lock cover 5 is covered by the color of the matched window, a handle is arranged, the handle is easy to pull out, and the operation is particularly convenient; the handle is convenient to retract and open. The assembly can be assembled on a flat-open window, is particularly suitable for a push-pull window formed by aluminum alloy, plastic steel alloy and other sectional materials, and has the advantages of simple and convenient assembly, attractive appearance and convenient shell replacement.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the principles and embodiments of the application may be implemented in conjunction with the detailed description of the application that follows, the examples being merely intended to facilitate an understanding of the method of the application and its core concepts; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

From the description of the embodiments above, it will be apparent to those skilled in the art that the application may be practiced. Of course, the above listed cases are only examples, and the present application is not limited thereto. Those skilled in the art will appreciate that other variations or simplifications of the inventive solution may be suitably employed in the present application and are intended to be included within the scope of the present application.

Claims

1. The chain window lock is characterized by comprising an upper cover assembly (1), a lower cover assembly (2), a handle assembly (3), a worm gear assembly (4) and a lock cover (5), wherein the upper cover assembly (1) is arranged above the lower cover assembly (2), the lock cover (5) is detachably arranged on the upper cover assembly (1), the handle assembly (3) is inserted into the upper cover assembly (1) through a through hole formed in the lock cover (5), and the worm gear assembly (4) is arranged on the upper cover assembly (1); the upper cover assembly (1) comprises an upper cover (10), a worm wheel fixing seat (11) and a lock head (12), wherein the worm wheel fixing seat (11) is fixedly arranged on the upper cover (10), and the lock head (12) is arranged on the upper cover (10) in parallel and is positioned on one side where the worm wheel fixing seat (11) is positioned; the worm gear assembly (4) comprises a worm gear (41), a worm gear cap (42), a wave post (43), a spring (44) and a worm gear sleeve (45), wherein the worm gear cap (42) is fixed at the top of a worm gear fixing seat (11), the worm gear cap (42) is sleeved at the head of the worm gear (41), 2 wave post hole sites are formed in one end worm gear, close to the edge of the worm gear fixing seat (11), of the worm gear assembly, after the wave post (43) is arranged in the wave post hole in the worm gear, the spring (44) is arranged to press the wave post (43), a worm gear sleeve (45) is arranged outside the spring (44), a buckling position is arranged on the worm gear sleeve (45) and is pressed into an outer ring groove of the worm gear; a handle assembly (3) detachably inserted into the worm wheel (41); the lower cover assembly (2) comprises a bottom shell (20), a chain (21), a chain tail positioner (22), a gear (23), chain teeth (24) and a gear fixing seat (25), wherein the chain teeth (24) are arranged on the gear (23), the chain (21) is meshed with the chain teeth (24), one end of the chain (21) limits the maximum extension length of the chain through the chain tail positioner (22), the bottom shell (20) is provided with a fixed positioning end point and an adjustable positioning point limiting piece, and the other end of the chain (21) extends out of the bottom shell (20) to drive a window to be opened and closed; a locking ratchet plate is arranged above the chain teeth (24), the gears can be locked and immobilized through a locking connecting rod, a gear fixing seat (25) is fixedly arranged below the chain teeth, and the gear fixing seat (25) is arranged on a lower cover so that the gears can rotate more stably; a gear (23) is arranged on the locking ratchet plate, and the gear (23) is meshed with the worm wheel (41); the gear (23) is a bevel gear, gear teeth of the bevel gear are meshed with worm teeth of the worm gear (41), and the chain (21) can stretch and retract in the inner groove of the bottom shell (20) in a guiding way through gear transmission; two long mounting holes (200) are formed in the bottom shell (20).

2. A chain window lock according to claim 1, characterized in that the lower cover assembly (2) further comprises a chain guide score (26), the chain guide score (26) being fixed to the bottom shell (20) for guiding the chain (21).

3. A chain window lock according to claim 1, characterized in that the handle assembly (3) is provided with a handle (30), the handle (30) being inserted into the wave post hole of the worm wheel (41); the handle (30) is provided with a clamping groove.

4. A chain window lock according to claim 1, characterized in that the lock head (12) is provided with a lock head fixing seat (121) and two lock head springs (122), and the tail part of the lock head (12) is provided with a tail elastic sheet (123).

5. A chain window lock according to claim 1, characterized in that the bottom shell (20) is provided with an ejector spring (27).

6. A chain window lock according to claim 1, characterized in that the upper cover (10) is provided with a positioning pin (109).