Handle seal for mortise lock

Abstract

The utility model relates to a handle sealing structure of plane lock, the lock shell has the accommodation cavity of top opening, the panel bottom surface of handle is recessed and has the installation recess, and the sealing gasket in installation recess includes annular fixed part and annular sealing lip, and the annular sealing lip includes first sealing contact part, on the first sealing contact part, the side away from the bottom of installation recess is the inner mouth along sealing surface of convex arc shape, is equipped with a recess on the first sealing contact part body located in the inner mouth along sealing surface back side, and the second sealing contact part is connected on the outer diameter side of first sealing contact part, and the second sealing contact part has the groove bottom sealing surface of the side facing the bottom of installation recess and the outer mouth along sealing surface of the side away from the bottom of installation recess, and the recess provides the elastic deformation space for the first sealing contact part, so that the operation force required when sealing gasket is in contact with the top opening mouth along sealing operation can be reduced. It has the advantages of light hand feeling, stable and reliable sealing.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a sealing structure for the handle of a flat lock. Background Technology

[0002] For some flat locks, good sealing and waterproofing, as well as a clean appearance, are required. Therefore, these flat locks use a lock cylinder mounted on a handle, forming a panel. When the lock is locked, the panel covers the top opening of the lock housing cavity. The panel and the edge of the top opening are sealed together by a corresponding sealing structure. Traditional sealing structures use multiple rubber sealing rings on the panel and raised ribs on the edge of the top opening. These ribs press against the rubber sealing rings to achieve a seal. With this design, the handle feels heavy when covering the lock housing and is prone to damaging the sealing rings, leading to a decrease in sealing effectiveness over time. Utility Model Content

[0003] The purpose of this invention is to overcome the defects of the existing technology and provide a handle sealing structure for a planar lock, which has the advantages of being lightweight and having a stable and reliable seal.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A handle sealing structure for a planar lock includes a lock housing and a handle. The lock housing has a receiving cavity with a top opening. The handle can pivot relative to the lock housing via a pivot axis to be in an open or closed position. The handle includes a panel, and a pivot member extending into the receiving cavity and pivotally connected to the lock housing is fixed to the bottom of the panel. A rubber seal is provided on the bottom surface of the panel. When the handle is in the closed position, the rubber seal seals a sealing engagement with the edge of the top opening. The handle panel has a recessed mounting groove on its bottom surface. The rubber seal is a sealing gasket disposed within the mounting groove. The sealing gasket includes an annular fixing portion fixed within the mounting groove. The fixing portion extends radially outward to form a circumferentially continuous annular sealing lip. The annular sealing lip includes a first sealing contact portion and a second sealing contact portion. On the first sealing contact portion, the side opposite to the bottom of the mounting groove is a convex arc-shaped inner edge sealing surface, and a cavity is provided on the body of the first sealing contact portion located on the back side of this inner edge sealing surface. The second sealing contact is connected to the outer diameter side of the first sealing contact. The second sealing contact has two sealing surfaces: a groove bottom sealing surface facing the bottom of the mounting groove and sealingly engaging with the bottom wall of the mounting groove, and an outer edge sealing surface away from the bottom of the mounting groove. On the edge of the top opening, the wall that mates with the first sealing contact portion is defined as the first sealing contact wall, and the wall that mates with the second sealing contact portion is defined as the second sealing contact wall. The cavity provides an elastic deformation space for the first sealing contact portion, thereby reducing the operating force required when the sealing gasket contacts the edge of the top opening for sealing.

[0005] Preferably, the top opening has a boss that can be inserted into the mounting groove along its edge, and the top surface of the boss is a second sealing mating wall; a slope extending upward to the top of the boss is a first sealing mating wall that mates with the first sealing contact portion.

[0006] Preferably, the outer sealing surface is concave arc-shaped, thereby forming a shallow groove at the outer sealing surface. The shallow groove provides elastic deformation space for the second sealing contact part, which reduces the operating force required when the sealing gasket contacts the top opening edge for sealing operation. The inner diameter side of the outer sealing surface is connected to the inner sealing surface, forming a continuous annular sealing rib on the outer periphery of the outer sealing surface.

[0007] Preferably, the mounting groove has a wedge-shaped mounting channel, and the fixing part abuts against the bottom of the mounting groove at one end in a wedge shape that matches the wedge-shaped mounting channel.

[0008] Preferably, the pivot member has an integrally formed frame plate, which presses the fixing part against the bottom of the mounting groove.

[0009] By adopting the above technical solution, a sealing gasket is installed on the handle, and two sealing contact parts are formed on the sealing gasket to achieve a sealing fit with the top edge, ensuring reliable sealing. The first sealing contact part on the inner side has a cavity, which creates a space between the sealing gasket and the bottom wall of the mounting groove. This reduces the operating force required when the sealing gasket contacts the top opening edge for sealing, thus achieving a lighter and smoother handle closing feel.

[0010] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0011] Figure 1 A diagram showing the closed state of the handle sealing structure of the planar lock of this utility model; Figure 2 for Figure 1 A sectional view taken along line AA. Figure 3 A diagram showing the handle-open state of the handle sealing structure of the planar lock of this utility model; Figure 4 This is a schematic diagram of the handle assembly of this utility model; Figure 5 This is an exploded view of the handle assembly of this utility model. Detailed Implementation

[0012] See appendix Figures 1-5 ,in Figure 2 The sealing gasket 3 shown is in its unmanifested form, and there is overlap at the mating positions. As those skilled in the art will understand, the overlapping parts will achieve a reliable fit through elastic deformation in actual applications. Figure 4 The corners of the handle panel are cut off to expose the cross-section; the handle sealing structure of a planar lock disclosed in this utility model includes a lock shell 1 and a handle 2. The lock shell 1 has a receiving cavity 11 with a top opening. The handle 2 can pivot relative to the lock shell 1 via a pivot axis to be in an open position (e.g., Figure 3 (as shown) or closed position (such as) Figure 1 and Figure 2 (As shown), the handle 2 includes a panel 21. A pivot member 22, extending into the receiving cavity 11 and pivotally connected to the lock housing 1, is fixed to the bottom of the panel 21. A fixing seat is provided on the panel 21, and the pivot member 22 is fixed to the fixing seat. A rubber seal is provided on the bottom surface of the panel 21. When the handle 2 is in the closed position, the rubber seal seals against the edge 111 of the top opening. A mounting groove 211 is recessed on the bottom surface of the panel 21 of the handle 2. The rubber seal is a sealing gasket 3 located within the mounting groove 211. The sealing gasket 3 includes an annular fixing part 31, which is fixed within the mounting groove 211. To ensure the fixing part 31 is securely and reliably fixed, a pressure plate is fixed to the lock housing 1, pressing against the fixing part 3. An annular frame plate 23 is mounted on the wall opposite to the bottom of the mounting groove 211. The inner diameter side of the mounting groove 211 has a supporting slope 2111 for receiving the fixing part 31. A ring of stop ribs 2112 is provided on the outer diameter side of the supporting slope 2111. The stop ribs 2112 and the supporting slope 2111 form a wedge-shaped channel 2110. The fixing part 31 has a wedge-shaped end 311 that inserts into the wedge-shaped channel 2110. A sloping fixing surface 3111 is formed on one side of the wedge-shaped end 311, supporting the supporting slope. With this design, when the surface of the fixing part 31 is pressed by the annular frame plate 23, the fixing part 31 is wedge-fixed to the bottom of the mounting groove 211, making the fixing part more firmly and reliably fixed. The annular frame plate 23 is integrally formed on the pivot member 22, achieving a compact design and convenient installation.

[0013] The fixing part 31 extends radially outward to form a circumferentially continuous annular sealing lip. The annular sealing lip includes a first sealing contact part 32 and a second sealing contact part 33. On the first sealing contact part 32, the side facing away from the bottom of the mounting groove 211 is a convex arc-shaped inner edge sealing surface 321. A cavity 322 is provided on the body of the first sealing contact part 32 located on the back side of the inner edge sealing surface 321. The second sealing contact part 33 is connected to the outer diameter side of the first sealing contact part 32. The second sealing contact part 33 has two sealing surfaces, one facing the bottom of the mounting groove 211. The top opening has a groove bottom sealing surface 331 that seals against the bottom wall of the mounting groove 211 and a groove outer edge sealing surface 332 on the side away from the bottom of the mounting groove 211. On the edge 111 of the top opening, the wall that mates with the first sealing contact 32 is defined as the first sealing contact wall 1111, and the wall that mates with the second sealing contact 33 is defined as the second sealing contact wall 1112. The cavity 322 provides elastic deformation space for the first sealing contact 32, reducing the operating force required for the sealing gasket 3 to seal against the top opening edge 111. Two sealing contact portions are formed on the sealing gasket to achieve a sealing fit with the top edge, ensuring reliable sealing. The first sealing contact portion on the inner side has a cavity, creating space between the sealing gasket and the bottom wall of the mounting groove. This reduces the operating force required for the sealing gasket to seal against the top opening edge, resulting in a lighter and smoother handle closing feel.

[0014] Furthermore, the top opening rim 111 is provided with a boss 1113 that can be inserted into the mounting groove 211. The top surface of the boss 1113 is a second sealing mating wall 1112; a slope extending upward to the top of the boss 1113 is a first sealing mating wall 1111 that mates with the first sealing contact part 32. The rim is inserted into the mounting groove to achieve mating with the sealing gasket, which is hidden in the mounting groove for protection. In addition, the first sealing mating wall adopts a sloped design, which can further improve sealing reliability and feel, and the sealing gasket is not easily damaged. Moreover, the boss 1113 forms a height difference on the outside of the rim 111, which further increases the difficulty for impurities to enter the rim and the sealing mating part of the sealing gasket, thereby improving sealing performance.

[0015] The bottom sealing surface 331 is preferably flat. The outer edge sealing surface 332 is concave arc-shaped, thus forming a shallow groove 3321 at the outer edge sealing surface 332. The shallow groove 3321 provides elastic deformation space for the second sealing contact part 33, which reduces the operating force required when the sealing gasket 3 contacts the top opening edge 111 for sealing. The inner diameter side of the outer edge sealing surface 332 is connected to the inner edge sealing surface 321, forming a continuous annular sealing rib 3322 on the outer periphery of the outer edge sealing surface 332.

Claims

1. A handle sealing structure for a planar lock, comprising a lock housing and a handle, the lock housing having a receiving cavity with a top opening, the handle being pivotable relative to the lock housing via a pivot shaft to be in an open or closed position, the handle including a panel, a pivot member fixed to the bottom of the panel extending into the receiving cavity and pivotally connected to the lock housing, and a rubber seal provided on the bottom surface of the panel, wherein when the handle is in the closed position, the rubber seal is in sealing engagement with the edge of the top opening, characterized in that: The bottom surface of the handle panel is recessed with a mounting groove. The rubber seal is a sealing gasket disposed within the mounting groove. The sealing gasket includes an annular fixing part, which is fixed within the mounting groove. The fixing part extends radially outward to form a circumferentially continuous annular sealing lip. The annular sealing lip includes a first sealing contact part and a second sealing contact part. On the first sealing contact portion, the side opposite to the bottom of the mounting groove is a convex arc-shaped inner edge sealing surface, and a cavity is provided on the body of the first sealing contact portion located on the back side of this inner edge sealing surface. The second sealing contact is connected to the outer diameter side of the first sealing contact. The second sealing contact has two sealing surfaces: a groove bottom sealing surface facing the bottom of the mounting groove and sealingly engaging with the bottom wall of the mounting groove, and an outer edge sealing surface away from the bottom of the mounting groove. On the edge of the top opening, the wall that mates with the first sealing contact portion is defined as the first sealing contact wall, and the wall that mates with the second sealing contact portion is defined as the second sealing contact wall. The cavity provides an elastic deformation space for the first sealing contact portion, thereby reducing the operating force required when the sealing gasket contacts the edge of the top opening for sealing.

2. The handle sealing structure of the planar lock according to claim 1, characterized in that: The top opening has a boss that can be inserted into the mounting groove along its edge, and the top surface of the boss is a second sealing mating wall; a slope extending upward to the top of the boss is a first sealing mating wall that mates with the first sealing contact part.

3. The handle sealing structure of the planar lock according to claim 2, characterized in that: The outer sealing surface is concave arc-shaped, thus forming a shallow groove at the outer sealing surface. The shallow groove provides elastic deformation space for the second sealing contact part, which reduces the operating force required when the sealing gasket contacts the top opening edge for sealing operation. The inner diameter side of the outer sealing surface is connected to the inner sealing surface, forming a continuous annular sealing rib on the outer periphery of the outer sealing surface.

4. The handle sealing structure of the planar lock according to claim 1, characterized in that: The mounting groove has a wedge-shaped mounting channel, and the fixing part abuts against one end of the bottom of the mounting groove in a wedge shape that matches the wedge-shaped mounting channel.

5. The handle sealing structure of the planar lock according to claim 1, characterized in that: The pivot member has an integrally formed frame plate, which presses the fixing part against the bottom of the mounting groove.

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