A small head zinc alloy inner sleeve lock shell

Abstract

The application relates to a small-head zinc alloy inner sleeve lock shell, which comprises, from outside to inside, an outer lock shell, an inner sleeve lock shell and a lock core, a lock cover is connected to the top of the outer lock shell, the lock core is arranged in the inner cavity of the inner sleeve lock shell, and the inner sleeve lock shell is arranged in the inner cavity of the outer lock shell, and the application relates to the technical field of door locks. The small-head zinc alloy inner sleeve lock shell can realize clamping and fixing of the inner sleeve lock shell for assembling the lock core, can guarantee that the lock core will not be loose in the use process to cause damage of the lock body, has good stability after the lock shell structure is assembled, improves the service life of the lock body, the pressure of the self-assembly is used to extrude the abutting air bag to make the air bag expand to provide power for the first plug-in rod and the second plug-in rod, and the fixing structure of the outer lock shell, the inner sleeve lock shell and the lock core is located on a line, is more stable, and will not shake.

Description

Technical Field

[0001] This invention relates to the field of door lock technology, specifically to a small-head zinc alloy inner lock shell. Background Technology

[0002] A lock typically consists of a front panel, a rear panel, and a lock body located between the front and rear panels and installed inside the door. The front panel of the lock is fixed to the front of the door, and the rear panel is fixed to the back of the door. The front panel usually has a front handle, keyhole, keypad, fingerprint recognition hole, etc., while the rear panel usually has a handle, keyhole, deadbolt knob, etc.

[0003] During the assembly process, a lock shell is needed to protect the internal lock cylinder. However, most existing lock shell structures are assembled and fixed by snap-fit, which is inefficient and reduces production efficiency. Moreover, long-term use of the lock body can cause the internal lock cylinder to shake, reducing the lifespan of the lock body.

[0004] According to the small-head zinc alloy inner sleeve lock shell described in patent number CN220267413U, when in use, the simple use of spring thrust to use the locking rod for locking cannot provide enough force to suppress the shaking of internal parts, resulting in a large gap. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a small-head zinc alloy inner sleeve lock case, which solves the aforementioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a small-head zinc alloy inner lock shell, comprising an outer lock shell, an inner lock shell, and a lock cylinder arranged sequentially from the outside to the inside. A lock cover is connected to the top of the outer lock shell. The lock cylinder is disposed within the inner cavity of the inner lock shell, and the inner lock shell is disposed within the inner cavity of the outer lock shell. One end of the lock cylinder passes through both the inner and outer lock shells and extends to the outer side of the outer lock shell. The lock cylinder and the inner lock shell are positioned by a first positioning component, and the inner and outer lock shells are positioned by a second positioning component. An abutment airbag that abuts against the bottom of the inner lock shell is fixedly connected to the inner cavity of the outer lock shell. The inner cavity of the outer lock shell is fixedly connected by an inner groove. The lock features an inflatable airbag connected to a contact airbag via a connecting pipe. A first insertion rod is fixedly connected to one side of the inflatable airbag. The inner cavity of the inner lock housing has a through groove located on one side of the first insertion rod. A fixing block is fixedly connected to the inner cavity of the through groove. A second insertion rod is slidably connected to the inner cavity of the fixing block. The inner cavity of the lock cylinder has a snap-fit ​​groove adapted to the second insertion rod. A movable plate is fixedly connected to the side of the second insertion rod near the lock cylinder. A return spring is fitted onto the surface of the second insertion rod between the movable plate and the fixing block. Both ends of the return spring are fixedly connected to one side of the movable plate and the fixing block, respectively. In use, the upper inner lock housing is inserted into the outer lock housing. Internally, the first positioning component positions the lock cylinder, which is then inserted into the inner lock housing. The second positioning component then positions the cylinder, with one end penetrating both the inner and outer lock housings and moving to the outside of the outer lock housing. The lock cover is then installed, and the sealing plug below it is rotated onto the threaded rod. The sealing plug then presses inward, causing the inner lock housing and lock cylinder to move downwards. The inner lock housing moves downwards, pressing against the air bladder. The gas inside the air bladder moves through the connecting pipe to the expansion air bladder, causing it to expand and extend the first insertion rod from the inner groove, abutting against the surface of the inner lock housing. Then, when the lock cover moves to the outer lock housing, the first insertion rod is located on one side of the through groove and is inserted into the through groove under air pressure. One end of the second insertion rod, which passes through the slot, is pressed, causing the second insertion rod to pull up and move the return spring within the fixed block. The other end of the second insertion rod is inserted into the snap-fit ​​groove inside the lock cylinder, thus fixing the outer lock shell, inner lock shell, and lock cylinder. This clamps and fixes the lock cylinder assembled inside the inner lock shell, ensuring that the lock cylinder will not become loose during use, preventing damage to the lock body. The assembled lock shell structure is stable, improving the service life of the lock body. The pressure of its own assembly compresses the airbag, causing it to expand and provide power to the first and second insertion rods respectively. Furthermore, the fixing structures of the outer lock shell, inner lock shell, and lock cylinder are aligned in a line, resulting in more stable fixing and preventing shaking.

[0007] As a further aspect of the present invention: the first positioning component includes a first positioning block fixed on both sides of the lock cylinder, and the inner cavity of the inner lock shell is provided with a first positioning groove that engages with the surface of the first positioning block. By setting the first positioning block and the first positioning groove, the lock cylinder can only be inserted into the inner lock shell at a fixed angle, which facilitates subsequent positioning.

[0008] As a further aspect of the present invention: the second positioning component includes a second positioning block fixed on both sides of the inner lock shell, and the inner cavity of the outer lock shell is provided with a second positioning groove that engages with the surface of the second positioning block. By setting the second positioning block and the second positioning groove, the inner lock shell can only be inserted into the outer lock shell at a fixed angle, which facilitates subsequent positioning.

[0009] As a further aspect of the present invention: in the assembled state of the first positioning component and the second positioning component, the first insertion rod, the second insertion rod, the through groove and the snap-fit ​​groove are coaxial.

[0010] As a further aspect of the present invention: a rubber sealing ring is fixedly connected to the surface of the lock cylinder, and a sealing groove adapted to the rubber sealing ring is opened in the inner cavity of the inner lock shell. The rubber sealing ring is engaged in the sealing groove to compress the lock cylinder and the inner lock shell, fill the gap between the lock cylinder and the inner lock shell, and perform expansion sealing to effectively prevent relative shaking between the inner lock shell and the lock cylinder.

[0011] As a further aspect of the present invention: the abutting airbag is composed of two annular airbags, one smaller than the other. The upper annular airbag is located between the outer lock shell and the inner lock shell, and the lower annular airbag is located below the inner lock shell. When the abutting airbag is squeezed, the upper annular airbag enters between the outer lock shell and the inner lock shell to expand and compress, pressing down on the outer lock shell and the inner lock shell to prevent shaking.

[0012] As a further aspect of the present invention: a sealing plug that abuts against the inner cavity of the outer lock shell is fixedly connected to the bottom of the lock cover, and a threaded rod that is threadedly connected to the inner cavity of the sealing plug is fixedly connected to the top of the lock cylinder.

[0013] As a further aspect of the present invention: a guide surface is provided above both the first plug rod and the second plug rod. By providing the guide surface, the first plug rod and the second plug rod can convert the force from the upper part into a force moving backward, without affecting the normal installation process.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention enables the clamping and fixing of the lock cylinder inside the inner lock shell, ensuring that the lock cylinder will not become loose during use and cause damage to the lock body. The lock shell structure is stable after assembly, which improves the service life of the lock body. The pressure of the assembly itself is used to squeeze the abutment airbag, causing it to expand and provide power to the first and second insertion rods respectively. Furthermore, the fixing structure of the outer lock shell, inner lock shell, and lock cylinder is located in a line, making the fixing more stable and preventing shaking.

[0016] In this invention, when the contact airbag is compressed, the upper annular airbag enters between the outer lock shell and the inner lock shell to expand and compress, pressing the outer lock shell and the inner lock shell to prevent shaking.

[0017] This invention uses a rubber sealing ring that is snapped into the sealing groove to compress the lock cylinder and the inner lock shell, filling the gap between them and creating an expansion seal, effectively preventing relative movement between the inner lock shell and the lock cylinder. Attached Figure Description

[0018] Figure 1 This is an exploded view of the structure of the present invention.

[0019] Figure 2 This is an anatomical view of the structure of the present invention.

[0020] Figure 3 This is a cross-sectional view of the structure of the present invention.

[0021] Figure 4 For the present invention Figure 3 A magnified view of a portion of point A in the middle.

[0022] In the diagram: 1. Lock cover; 2. Lock cylinder; 3. Inner lock shell; 4. Outer lock shell; 5. Abutting airbag; 6. Inner groove; 7. Inflating airbag; 8. First insertion rod; 9. Connecting pipe; 10. Through groove; 11. Fixing block; 12. Return spring; 13. Movable plate; 14. Second insertion rod; 15. Snap-fit ​​groove; 16. Second positioning block; 17. Second positioning groove; 18. First positioning block; 19. First positioning groove; 20. Sealing plug; 21. Threaded rod; 22. Rubber sealing ring; 23. Sealing groove. Detailed Implementation

[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0024] Please see Figure 1-4This invention provides a technical solution: a small-head zinc alloy inner lock shell, comprising an outer lock shell 4, an inner lock shell 3, and a lock cylinder 2 arranged sequentially from the outside to the inside. A lock cover 1 is connected to the top of the outer lock shell 4. The lock cylinder 2 is disposed in the inner cavity of the inner lock shell 3, and the inner lock shell 3 is disposed in the inner cavity of the outer lock shell 4. One end of the lock cylinder 2 passes through the inner lock shell 3 and the outer lock shell 4 sequentially and extends to the outside of the outer lock shell 4. The lock cylinder 2 and the inner lock shell 3 are positioned by a first positioning component, and the inner lock shell 3 and the outer lock shell 4 are positioned by a second positioning component. An abutment airbag 5 is fixedly connected to the inner cavity of the outer lock shell 4, abutting against the bottom of the inner lock shell 3. An inflatable airbag 7 is fixedly connected to the inner cavity of the outer lock shell 4 through an inner groove 6. The inflatable airbag 7 and the abutment airbag 5 are connected by a connecting pipe. The inner lock housing 3 is connected to the outer lock housing 4. A through groove 10 is formed in the inner cavity of the inner lock housing 3, located on one side of the first insertion rod 8. A fixing block 11 is fixedly connected to the inner cavity of the through groove 10. A second insertion rod 14 is slidably connected to the inner cavity of the fixing block 11. A snap-fit ​​groove 15, adapted to the second insertion rod 14, is formed in the inner cavity of the lock cylinder 2. A movable plate 13 is fixedly connected to the side of the second insertion rod 14 closest to the lock cylinder 2. A return spring 12 is fitted onto the surface of the second insertion rod 14 between the movable plate 13 and the fixing block 11. Both ends of the return spring 12 are fixedly connected to one side of the movable plate 13 and the fixing block 11, respectively. In use, the inner lock housing 3 is inserted into the outer lock housing 4, and positioning is achieved by the first positioning component. Then, the lock cylinder 2 is inserted into the inner lock shell 3. At this time, it is positioned by the second positioning component. One end of the lock cylinder 2 passes through the inner lock shell 3 and the outer lock shell 4 in sequence and moves to the outside of the outer lock shell 4. At this time, the lock cover 1 is installed, and the sealing plug 20 below it is rotated and installed on the threaded rod 21. At this time, the sealing plug 20 presses the inner lock shell 3 and the lock cylinder 2 downward respectively. The inner lock shell 3 moves downward and presses against the air bladder 5. At this time, the gas in the air bladder 5 moves to the expansion air bladder 7 through the connecting pipe 9, pushing the expansion and extending the first insertion rod 8 from the inner groove 6 to abut against the surface of the inner lock shell 3. Then, when the lock cover 1 moves to the end, the first insertion rod 8 is located on one side of the through groove 10 and is inserted into the through groove 10 under air pressure. The second insertion rod 14 is pressed at one end, causing the second insertion rod 14 to pull the return spring 12 within the fixing block 11. One end of the second insertion rod 14 is inserted into the snap-fit ​​groove 15 inside the lock cylinder 2, thus fixing the outer lock shell 4, the inner lock shell 3, and the lock cylinder 2. This achieves the clamping and fixing effect on the lock cylinder 2 assembled inside the inner lock shell 3, ensuring that the lock cylinder 2 will not become loose during use, thus preventing damage to the lock body. The lock shell structure is stable after assembly, improving the service life of the lock body. The pressure of its own assembly is used to compress the abutment airbag 5, causing it to expand and provide power to the first insertion rod 8 and the second insertion rod 14 respectively. Furthermore, the fixing structure of the outer lock shell 4, the inner lock shell 3, and the lock cylinder 2 is located in a line, making the fixing more stable and preventing shaking.

[0025] The first positioning component includes a first positioning block 18 fixed on both sides of the lock cylinder 2. The inner cavity of the inner lock shell 3 has a first positioning groove 19 that engages with the surface of the first positioning block 18. By setting the first positioning block 18 and the first positioning groove 19, the lock cylinder 2 can only be inserted into the inner lock shell 3 at a fixed angle, which facilitates subsequent positioning.

[0026] The second positioning component includes a second positioning block 16 fixed on both sides of the inner lock shell 3. The inner cavity of the outer lock shell 4 is provided with a second positioning groove 17 that engages with the surface of the second positioning block 16. By setting the second positioning block 16 and the second positioning groove 17, the inner lock shell 3 can only be inserted into the outer lock shell 4 at a fixed angle, which facilitates subsequent positioning.

[0027] In the assembled state of the first positioning component and the second positioning component, the first insertion rod 8, the second insertion rod 14, the through groove 10 and the snap-fit ​​groove 15 are coaxial.

[0028] A rubber sealing ring 22 is fixedly connected to the surface of the lock cylinder 2. The inner cavity of the inner lock shell 3 is provided with a sealing groove 23 that matches the rubber sealing ring 22. The rubber sealing ring 22 is engaged in the sealing groove 23, which compresses the lock cylinder 2 and the inner lock shell 3, fills the gap between the lock cylinder 2 and the inner lock shell 3, and expands to seal, effectively preventing relative shaking between the inner lock shell 3 and the lock cylinder 2.

[0029] The abutment airbag 5 consists of two annular airbags, one smaller at the top and one larger at the bottom. The upper annular airbag is located between the outer lock shell 4 and the inner lock shell 3, while the lower annular airbag is located below the inner lock shell 3. When the abutment airbag 5 is compressed, the upper annular airbag enters between the outer lock shell 4 and the inner lock shell 3 and expands to compress them, thus pressing down on the outer lock shell 4 and the inner lock shell 3 to prevent shaking.

[0030] The bottom of the lock cover 1 is fixedly connected to a sealing plug 20 that abuts against the inner cavity of the outer lock shell 4, and the top of the lock cylinder 2 is fixedly connected to a threaded rod 21 that is threadedly connected to the inner cavity of the sealing plug 20.

[0031] The first plug rod 8 and the second plug rod 14 are both provided with guide surfaces. By setting the guide surfaces, the first plug rod 8 and the second plug rod 14 can convert the force from the upper part into a force that moves backward, without affecting the normal installation process.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A small-head zinc alloy inner lock housing, comprising an outer lock housing (4), an inner lock housing (3), and a lock cylinder (2) arranged sequentially from the outside to the inside, wherein a lock cover (1) is connected to the top of the outer lock housing (4), the lock cylinder (2) is disposed in the inner cavity of the inner lock housing (3), the inner lock housing (3) is disposed in the inner cavity of the outer lock housing (4), and one end of the lock cylinder (2) sequentially penetrates the inner lock housing (3) and the outer lock housing (4) and extends to the outside of the outer lock housing (4), characterized in that: The lock cylinder (2) and the inner lock shell (3) are positioned by a first positioning component, and the inner lock shell (3) and the outer lock shell (4) are positioned by a second positioning component. The inner cavity of the outer lock shell (4) is fixedly connected to an abutment airbag (5) that abuts against the bottom of the inner lock shell (3). The inner cavity of the outer lock shell (4) is fixedly connected to an expansion airbag (7) through an inner groove (6). The expansion airbag (7) and the abutment airbag (5) are connected through a connecting pipe (9). A first insertion rod (8) is fixedly connected to one side of the expansion airbag (7). The inner cavity of the inner lock shell (3) has an opening located on one side of the first insertion rod (8). The through groove (10) is fixedly connected to the inner cavity of the through groove (10), and the inner cavity of the fixed block (11) is slidably connected to the second plug rod (14). The inner cavity of the lock cylinder (2) is provided with a snap-fit ​​groove (15) adapted to the second plug rod (14). The second plug rod (14) is fixedly connected to a movable plate (13) on the side near the lock cylinder (2). A return spring (12) is sleeved on the surface of the second plug rod (14) between the movable plate (13) and the fixed block (11). The two ends of the return spring (12) are fixedly connected to one side of the movable plate (13) and the fixed block (11), respectively.

2. The small-head zinc alloy inner sleeve lock case according to claim 1, characterized in that: The first positioning component includes a first positioning block (18) fixed on both sides of the lock cylinder (2), and the inner cavity of the inner lock shell (3) is provided with a first positioning groove (19) that engages with the surface of the first positioning block (18).

3. The small-head zinc alloy inner sleeve lock case according to claim 1, characterized in that: The second positioning component includes a second positioning block (16) fixed on both sides of the inner lock shell (3), and the inner cavity of the outer lock shell (4) is provided with a second positioning groove (17) that engages with the surface of the second positioning block (16).

4. The small-head zinc alloy inner sleeve lock case according to claim 1, characterized in that: In the assembled state of the first positioning component and the second positioning component, the first plug rod (8), the second plug rod (14), the through groove (10) and the snap groove (15) are coaxial.

5. The small-head zinc alloy inner sleeve lock case according to claim 1, characterized in that: A rubber sealing ring (22) is fixedly connected to the surface of the lock cylinder (2), and a sealing groove (23) adapted to the rubber sealing ring (22) is opened in the inner cavity of the inner lock shell (3).

6. The small-head zinc alloy inner sleeve lock case according to claim 1, characterized in that: The bottom of the lock cover (1) is fixedly connected to a sealing plug (20) that abuts against the inner cavity of the outer lock shell (4), and the top of the lock cylinder (2) is fixedly connected to a threaded rod (21) that is threadedly connected to the inner cavity of the sealing plug (20).

7. The small-head zinc alloy inner sleeve lock case according to claim 1, characterized in that: A guide surface is provided above both the first plug rod (8) and the second plug rod (14).

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