Sealing structure of lock

Abstract

The sealing structure comprises a lock cylinder mounting seat hole and a lock cylinder, an annular groove and a lock cylinder protective cover are arranged on the opening portion of the lock cylinder mounting seat hole, the section of the annular groove is in a U shape, a blocking portion is correspondingly arranged between the annular groove and the opening portion of the mounting seat hole, and the lock cylinder protective cover comprises a covering plate. A buckling edge buckled into the annular groove is arranged on the covering plate in a protruding mode, a first sealing convex rib and a second sealing convex rib which are arranged from the root of the buckling edge to the end in the axial direction are arranged on the circumferential wall of the inner side of the buckling edge, and a third sealing convex rib and a fourth sealing convex rib which are arranged from the root of the buckling edge to the end in the axial direction are arranged on the circumferential wall of the outer side of the buckling edge. A convex rib matching groove is formed in the annular outer cylinder wall of the annular groove, the third sealing convex rib is in contact sealing fit with the annular outer cylinder wall of the annular groove, the fourth sealing convex rib is clamped in the convex rib matching groove, and the first sealing convex rib and the second sealing convex rib are both in contact sealing fit with the annular inner cylinder wall of the annular groove. And the sealing waterproof performance is good.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, more specifically to a sealing structure of a lock. Background Art

[0002] In order to ensure the service life and working reliability of the lock, the lock usually adopts a corresponding waterproof sealing structure design. However, the existing sealing waterproof structure design is unreasonable, and the common waterproof structure design at the lock core position is unreasonable. For example, the lock core waterproof cover structure design set at the lock core is simple and the waterproof performance is unreliable; for example, the rotating part of the lock core itself has no special waterproof structure design. Summary of the invention

[0003] The purpose of the utility model invention is to overcome the defects of the prior art, and to provide a sealing structure of a lock with reasonable waterproof structure design and good sealing and waterproof performance.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The lock core of the embodiment of the present invention is a kind of sealing structure, comprising a lock core mounting seat hole and a lock core rotatably arranged in the lock core mounting seat hole, the mouth of the lock core mounting seat hole is provided with an annular groove surrounding the lock core mounting seat hole and a lock core protective cover covering the lock core mounting seat hole mouth, the cross-sectional shape of the annular groove is U-shaped, and a barrier portion is provided between the annular groove and the mounting seat hole mouth, and the lock core protective cover comprises a cover plate, and a buckle edge protrudes from the cover plate and buckles into the annular groove, and is characterized in that: a first sealing rib and a second sealing rib are arranged axially from the root of the buckle edge to the end portion on the inner circumferential wall of the buckle edge, a third sealing rib and a fourth sealing rib are arranged axially from the root of the buckle edge to the end portion on the outer circumferential wall of the buckle edge, a rib matching groove is provided on the annular outer cylinder wall of the annular groove, the third sealing rib is in contact and sealing cooperation with the annular outer cylinder wall of the annular groove, the fourth sealing rib is stuck in the rib matching groove, and the first sealing rib and the second sealing rib are both in contact and sealing cooperation with the annular inner cylinder wall of the annular groove.

[0006] Preferably, a sealing skirt is protruded from the end of the outer circumferential wall of the buckle edge, and the sealing skirt contacts and seals with the annular outer cylinder wall of the annular groove.

[0007] Preferably, it includes a handle that supports the lock core mounting seat hole, and a lock shell for mounting the handle, the lock shell is provided with a groove cavity for the handle to be buckled into, a through hole is provided at the bottom of the annular groove, a connecting piece is formed on the buckle edge, a stop expansion portion is provided on the connecting piece, the connecting piece passes through the through hole, the stop expansion portion stops with the through hole mouth to limit the connecting piece from slipping out of the through hole.

[0008] Preferably, a waterproof rib is raised on the bottom wall of the annular groove, and the waterproof rib is integrally connected with the inner and outer cylinder walls of the annular groove. A waterproof rib is provided on both sides of the edge of the inner opening of the annular groove where the insertion hole is located.

[0009] Preferably, the end of the buckle edge is provided with a notch which corresponds one-to-one with the waterproof rib, and the waterproof rib is inserted into the notch.

[0010] Preferably, the lock housing has a handle snap-fitting surface surrounding the groove cavity mouth, and the handle has a panel portion corresponding to the handle snap-fitting surface. The panel portion and the handle snap-fitting surface are sealed via an annular sealing gasket, and the sealing gasket is fixed on the panel portion, and the sealing gasket is in contact and sealed with the handle snap-fitting surface.

[0011] Preferably, a pull tab is formed on the outer surface of the cover plate, one end of the pull tab is fixed to the edge of the cover plate and the other end extends toward the inside of the cover plate, a recess is provided in the center of the cover plate, and the pull tab corresponds to the position of the recess, thereby forming an operating space below the pull tab.

[0012] Preferably, a cylindrical button is positioned and slidably fitted in the lock core mounting seat hole, and the lock core can be rotatably assembled in the central cylindrical cavity of the cylindrical button. A shoulder is provided on the outer circumferential side of the cylindrical button, and an annular sealing gasket is padded on the shoulder. The lock core mounting seat hole has a step corresponding to the shoulder, and the step is sealingly fitted with the sealing gasket; a sealing ring groove is provided on the lock core, and a sealing ring is installed in the sealing ring groove, and the central cylindrical cavity of the cylindrical button has an annular sealing fitting surface, and the sealing fitting surface is in contact and sealing fit with the lock core via the sealing ring.

[0013] By adopting the above technical solution, after the buckle edge is buckled into the annular groove, the first sealing rib, the second sealing rib, the third sealing rib, the fourth sealing rib and the annular groove cooperate with each other to form a maze structure, thereby effectively improving the sealing and waterproof ability of the lock core protective cover on the lock core.

[0014] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram of the handle of the lock of the utility model in an expanded state;

[0016] Figure 2 It is a partial exploded view of the lock of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the lock of the utility model;

[0018] Figure 4 for Figure 3 Sectional view along line AA;

[0019] Figure 5 for Figure 4 A partial enlarged view of part B;

[0020] Figure 6 It is a structural schematic diagram of the lock core protective cover of the utility model. DETAILED DESCRIPTION

[0021] See attached Figures 1 to 6 The utility model discloses a sealing structure of a lock, comprising a lock shell 1 and a handle 2. The handle 2 is pivotally mounted on the lock shell 1. The lock shell 1 has a groove 11 for the handle 2 to be buckled into. In this specific embodiment, a lock core 3 is mounted on the handle 2 and moves with the handle 2, that is, a lock core mounting seat hole 21 is provided on the handle 2. A rotatable lock core 3 is arranged in the lock core mounting seat hole 21. In order to achieve the sealing and waterproof performance after the handle 2 is buckled on the lock shell 1, the lock shell 1 has a handle buckling surface surrounding the mouth of the groove 11. 12, the handle 2 has a panel portion 22 corresponding to the handle buckling surface 12, and the panel portion 22 and the handle buckling surface 12 are sealed via an annular sealing gasket 4; the mouth of the lock core mounting seat hole 21 is provided with an annular groove 23 surrounding the lock core mounting seat hole 21 and a lock core protective cover 5 covering the mouth of the lock core mounting seat hole 21, the cross-sectional shape of the annular groove 23 is U-shaped, and a blocking portion 24 is correspondingly provided between the annular groove 23 and the mouth of the mounting seat hole 21, and the lock core protective cover 5 includes a cover plate 51, The cover plate 51 is provided with a buckle edge 52 which is buckled into the annular groove 23. Usually, the annular cylinder wall (i.e., the annular inner cylinder wall 231) on one side of the blocking portion 24 corresponding to the annular groove 23 is sloped. Accordingly, the inner circumferential wall of the buckle edge 52 is a cone adapted to the annular inner cylinder wall 231 of the annular groove 23. In order to solve the defect of insufficient waterproof sealing performance of the lock cylinder protective cover in the prior art, the inner circumferential wall of the buckle edge 52 is provided with a first sealing rib 521 and a second sealing rib 521 arranged axially from the root of the buckle edge to the end thereof. 22, the outer circumferential wall of the buckle edge 52 is provided with a third sealing rib 523 and a fourth sealing rib 524 arranged axially from the root of the buckle edge to the end thereof, a rib matching groove 233 is provided on the annular outer cylinder wall 232 of the annular groove 23, the third sealing rib 523 is in contact and seal with the annular outer cylinder wall 232 of the annular groove 23, the fourth sealing rib 524 is stuck in the rib matching groove 233, and the first sealing rib 521 and the second sealing rib 522 are both in contact and seal with the annular inner cylinder wall of the annular groove 23. After the buckle edge is buckled into the annular groove, the first sealing rib, the second sealing rib, the third sealing rib, the fourth sealing rib and the annular groove cooperate with each other to form a labyrinth structure, thereby effectively improving the sealing and waterproofing capability of the lock cylinder protective cover to the lock cylinder.

[0022] Furthermore, a sealing skirt 525 is protruded from the end of the outer circumferential wall of the buckle edge 52 , and the sealing skirt 525 is in contact and sealing cooperation with the annular outer cylinder wall 232 of the annular groove 23 .

[0023] In order to prevent the lock cylinder protective cover from being lost, a through hole 25 is provided at the bottom of the annular groove 23, a connecting piece 53 is formed on the buckle edge 52, and a stop expansion part 531 is provided on the connecting piece 53. The connecting piece passes through the through hole 25, and the stop expansion part 531 stops with the opening of the through hole 25 to limit the connecting piece 53 from slipping out of the through hole 25. Although the through hole 25 is located at the bottom of the annular groove and can provide waterproof sealing protection under the cover of the lock cylinder protective cover, the existence of the through hole 25 inevitably leads to the risk of water infiltrating into the lock through the annular groove. Therefore, in order to reduce the above risk, a waterproof convex rib 234 is raised on the bottom wall of the annular groove 23, and the waterproof convex rib 234 is integrally formed and connected with the inner cylinder wall 231 and the outer cylinder wall 232 of the annular groove 23. A waterproof convex rib 234 is provided on both sides of the edge of the through hole 25 located at the inner opening of the annular groove 23; thus, there is a blocking part higher than the bottom wall of the annular groove at the position of the through hole 25. Furthermore, the end of the buckle edge 52 is provided with a notch 526 corresponding to the waterproof rib 234, and the waterproof rib 234 is inserted into the notch 526. In this way, the buckle edge can be buckled more deeply in the annular groove to ensure the sealing reliability of the lock core protective cover.

[0024] A pull tab 54 is usually formed on the outer surface of the cover plate 51 of the lock core protective cover 5, so as to facilitate pulling the lock core protective cover to reveal the keyhole of the lock core. One end of the pull tab 54 is fixed to the edge of the cover plate 51 and the other end extends toward the inside of the cover plate 51. A recess 511 is provided at the center of the cover plate 51, and the pull tab 54 corresponds to the position of the recess 511, so as to form an operating space 512 below the pull tab 54. The pull tab extends toward the inside of the cover plate, that is, the pull tab is directly opposite to the upper position of the cover plate. Compared with the existing pull tab that is protruding outward, when the lock is used in a vehicle, the pull tab can face away from the roller brush of the automatic car washing machine to avoid collision with the roller brush and reduce the impact on the pull tab.

[0025] In the lock disclosed by the utility model, a lock core position press-unlocking structure is adopted, a cylindrical button 6 is positioned and slidably fitted in the lock core mounting seat hole 21, and the lock core 3 can be rotatably assembled in the central cylindrical cavity of the cylindrical button 6; in order to further improve the sealing and waterproof performance of the lock and meet the needs of the lock in a relatively harsh use environment, the following further optimization design is carried out: a shoulder 61 is provided on the outer circumference of the cylindrical button 6, and an annular sealing gasket 62 is padded on the shoulder 61, and common sealing gaskets such as foam cotton or rubber rings are used. The lock core mounting seat hole 21 has a step 211 corresponding to the shoulder 61, and the step 211 is sealed with the sealing gasket 62; a sealing ring groove is provided on the lock core 3, and a sealing ring 31 is installed in the sealing ring groove, and the central cylindrical cavity of the cylindrical button 6 has an annular sealing matching surface, and the sealing matching surface is in contact and sealed with the lock core through the sealing ring 31.

[0026] In this specific embodiment, the sealing gasket 4 is fixed to the panel portion 22 of the handle 2. The panel portion 22 is provided with a sealing ring groove for fixing and installing the sealing gasket 4. The sealing gasket 4 is in contact and sealed with the handle buckle surface 12. The sealing gasket is provided on the handle and is relatively hidden, thereby reducing the risk of being bumped and scratched by foreign objects.

Claims

1. A sealing structure of a lock, comprising a lock core mounting seat hole and a lock core rotatably disposed in the lock core mounting seat hole, the mouth of the lock core mounting seat hole is provided with an annular groove surrounding the lock core mounting seat hole and a lock core protective cover covering the lock core mounting seat hole mouth, the annular groove cross-section is U-shaped, and a blocking portion is provided between the annular groove and the mounting seat hole mouth, the lock core protective cover comprises a cover plate, and a buckle edge protruding from the cover plate is buckled into the annular groove, characterized in that: The inner circumferential wall of the buckle edge is provided with a first sealing rib and a second sealing rib arranged axially from the root of the buckle edge to the end, the outer circumferential wall of the buckle edge is provided with a third sealing rib and a fourth sealing rib arranged axially from the root of the buckle edge to the end, a rib matching groove is provided on the annular outer cylinder wall of the annular groove, the third sealing rib is in contact and sealing cooperation with the annular outer cylinder wall of the annular groove, the fourth sealing rib is stuck in the rib matching groove, and the first sealing rib and the second sealing rib are both in contact and sealing cooperation with the annular inner cylinder wall of the annular groove.

2. The sealing structure of the lock according to claim 1, characterized in that: A sealing skirt is protruded from the end of the outer circumferential wall of the buckle edge, and the sealing skirt is in contact and sealing cooperation with the annular outer cylinder wall of the annular groove.

3. The sealing structure of the lock according to claim 1, characterized in that: It includes a handle that supports the lock core mounting seat hole and a lock shell for mounting the handle. The lock shell is provided with a groove cavity for the handle to be buckled into, and a through hole is provided at the bottom of the annular groove. A connecting piece is formed on the buckle edge, and a stop expansion portion is provided on the connecting piece. The connecting piece passes through the through hole, and the stop expansion portion stops the through hole mouth to limit the connecting piece from escaping from the through hole.

4. The sealing structure of the lock according to claim 3, characterized in that: A waterproof rib is raised on the bottom wall of the annular groove, and the waterproof rib is integrally connected with the inner and outer cylinder walls of the annular groove. A waterproof rib is provided on both sides of the edge of the inner opening of the annular groove at the insertion hole.

5. The sealing structure of the lock according to claim 4, characterized in that: The end of the buckle edge is provided with a notch which corresponds to the waterproof convex rib one by one, and the waterproof convex rib is inserted into the notch.

6. The sealing structure of the lock according to claim 3, characterized in that: The lock shell has a handle snap-fitting surface surrounding the groove cavity mouth, and the handle has a panel portion corresponding to the handle snap-fitting surface. The panel portion and the handle snap-fitting surface are sealed via an annular sealing gasket, and the sealing gasket is fixed on the panel portion, and the sealing gasket contacts and seals with the handle snap-fitting surface.

7. The sealing structure of the lock according to claim 3, characterized in that: A pull tab is formed on the outer surface of the cover plate, one end of the pull tab is fixed to the edge of the cover plate and the other end extends toward the inside of the cover plate. A recess is provided in the center of the cover plate, and the pull tab corresponds to the recess position, thereby forming an operating space below the pull tab.

8. The sealing structure of the lock according to claim 3, characterized in that: A cylindrical button is positioned and slidably fitted in the lock core mounting seat hole, and the lock core can be rotatably assembled in the central cylindrical cavity of the cylindrical button. A shoulder is provided on the outer circumferential side of the cylindrical button, and an annular sealing gasket is padded on the shoulder. The lock core mounting seat hole has a step corresponding to the shoulder, and the step is sealingly fitted with the sealing gasket; a sealing ring groove is provided on the lock core, and a sealing ring is installed in the sealing ring groove. The central cylindrical cavity of the cylindrical button has an annular sealing fitting surface, and the sealing fitting surface is in contact and sealing fit with the lock core via the sealing ring.

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