Hidden door lock convenient to install

Abstract

A hidden door lock convenient to install comprises an inner handle unit, an outer handle unit and a transmission shaft, the inner handle unit and the outer handle unit each comprise a door handle and an installation base, each installation base is provided with a first through hole and at least one installation connecting hole, the inner handle unit and the outer handle unit further each comprise a housing, and each housing is provided with a first through hole and at least one installation connecting hole. The housing comprises a panel and a protective surrounding edge arranged around the outer contour of the back of the panel, the panel and the protective surrounding edge form a mounting cavity located in the back of the housing, and the mounting seat is mounted in the mounting cavity; a second through hole is formed in the panel, one end of the transmission shaft is connected with the door handle, and the other end of the transmission shaft penetrates through the first through hole and the second through hole. The mounting seat is mounted in the mounting cavity in a hidden manner, so that the mounting connecting hole is not exposed, the effect that no mounting trace exists outside the housing is achieved, and the attractiveness of the door lock is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a concealed and convenient installation door lock. Background Art

[0002] As the name implies, a door lock is a device used to lock a door to prevent others from opening it. The most commonly used door lock at present is a handle door lock, which has high security and a low price.

[0003] Referring to the door lock disclosed in the Chinese patent with the patent number CN202322651272.5, in the prior art, bolt holes are usually provided on the front surface of the mounting seats of two door locks, and bolts pass through the bolt holes and are connected to the door body or the lock box of the door lock. In this structure, the bolt holes and the heads of the bolts are exposed, affecting the aesthetics of the door lock, and external dirt (such as water and dust, etc.) is also likely to fall on the bolt holes and the heads of the bolts, causing corrosion and damage. Therefore, there is still room for improvement. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a concealed and convenient installation door lock.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A concealed and convenient installation door lock includes an inner handle unit, an outer handle unit and a transmission shaft. Both the inner handle unit and the outer handle unit include a door handle and a mounting seat for connecting to a door panel. The mounting seat is provided with a first through hole and at least one installation connection hole. The characteristics are that: both the inner handle unit and the outer handle unit further include a cover shell for hiding the mounting seat. The cover shell includes a panel and a protective border arranged around the outer contour of the back of the panel. The panel and the protective border form an installation cavity at the back of the cover shell. The mounting seat is installed in the installation cavity, and a snap-fit structure for snap-fitting them together is provided between the mounting seat and the cover shell; a second through hole for the transmission shaft to pass through is provided on the panel. The second through hole is communicated with the installation cavity and corresponds to the first through hole. One end of the transmission shaft is connected to the door handle, and the other end passes through the first through hole and the second through hole.

[0007] In the utility model, the snap-fit structure includes a snap groove provided on the wall of the installation cavity and a snap portion provided on the mounting seat. When the mounting seat is installed in the installation cavity, the snap portion snaps into the snap groove.

[0008] In the utility model, the snap groove is located in the upper part of the installation cavity, the snap portion is located in the upper part of the mounting seat, and a locking screw hole penetrating and communicating with the installation cavity is provided at the bottom of the protective border. A first set screw for locking the bottom of the mounting seat is threadedly engaged in the locking screw hole.

[0009] In the present utility model, the protective border includes a top edge, a bottom edge located below the top edge, and two side edges located between the top edge and the bottom edge. The top edge, the bottom edge, and the two side edges are integrally connected to form a rectangular frame structure, and the locking screw hole is provided on the bottom edge.

[0010] In the present utility model, a first extension convex portion located in the installation cavity is convexly provided on the bottom edge, and the locking screw hole extends through the first extension convex portion from the bottom edge.

[0011] In the present utility model, there are at least two fastening portions, which are arranged on the top of the mounting base from left to right. There are at least two fastening grooves located at the bottom of the top edge, and at least one fastening portion is fastened in each fastening groove.

[0012] In the present utility model, a first strengthening convex portion and a second strengthening convex portion are provided in the installation cavity. Among them, the first strengthening convex portion connects the top surface of the bottom edge to the back surface of the panel, and the second strengthening convex portion connects the bottom surface of the top edge to the back surface of the panel.

[0013] In the present utility model, an installation mating portion for cooperating with the first set screw is provided at the bottom of the front end of the mounting base. When the first set screw is tightened, the upper end of the first set screw abuts against the installation mating portion.

[0014] In the present utility model, an installation positioning hole for partially inserting the first set screw is provided on the installation mating portion.

[0015] In the present utility model, a second extension convex portion is provided on the left side or / and the right side of the front end of the mounting base. The lower end of the second extension convex portion is connected to the installation mating portion, and the upper end extends to the top of the mounting base.

[0016] Advantages of the present utility model: The present utility model is provided with a housing. By hiding the mounting base in the installation cavity and surrounding the mounting base with the housing, the installation connection holes are not exposed, achieving the effect that there are no installation traces on the outside of the housing, thereby effectively improving the aesthetics of the door lock. Moreover, it can also effectively reduce the probability of external dirt entering the interior of the mounting base, prevent external dirt from corroding and damaging the internal structural components of the inner door handle unit and the outer door handle unit, and further achieve the purpose of extending the service life of the door lock. In addition, a fastening structure is provided between the mounting base and the housing, and they are fastened together by using the fastening structure. The structure is simple, the installation is convenient, and the installation efficiency of the door lock can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0018] Figure 1 is a perspective view of this embodiment;

[0019] Figure 2 Exploded view of the inner handle unit;

[0020] Figure 3 Schematic diagram of the inner handle unit after removing the mounting base;

[0021] Figure 4 Exploded view of the outer handle unit Figure 1 ;

[0022] Figure 5 Exploded view of the outer handle unit Figure 2 ;

[0023] Figure 6 Stereogram of the housing;

[0024] Figure 7 Cross-section of the door lock Figure 1 ;

[0025] Figure 8 Cross-section of the door lock Figure 2 . Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then such directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first" or "second" etc. in the embodiments of the present utility model, then such descriptions of "first" or "second" etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0029] Refer to Figure 1-8, A concealed and conveniently installed door lock, comprising an inner door handle unit, an outer door handle unit and a transmission shaft 1. The inner door handle unit and the outer door handle unit are arranged relatively. The middle part of the transmission shaft 1 is in transmission cooperation with the lock tongue of the lock core assembly, and the two ends of the transmission shaft 1 are respectively connected to the inner door handle unit and the outer door handle unit.

[0030] Furthermore, both the inner door handle unit and the outer door handle unit include a door handle 2, a mounting base 3 and a housing 4 for hiding the mounting base 3. The mounting base 3 is provided with a first through hole 30 for the transmission shaft 1 to pass through and at least one mounting connection hole 34 for cooperating with fastening bolts to mount the mounting base 3 on the door body or the lock box. There are four mounting connection holes 34 which are distributed at the four corners, and each mounting connection hole 34 can be penetrated by a fastening bolt, so as to fix the mounting base 3 on the door body or the lock box by using the fastening bolts.

[0031] Still further, the housing 4 includes a panel 41 and a protective border 42 arranged around the outer contour of the back of the panel 41. The panel 41 and the protective border 42 form a mounting cavity located at the back of the housing 4. The mounting base 3 is installed in the mounting cavity; a fastening structure is provided between the mounting base 3 and the housing 4 to fasten them together; the door handle 2 is rotatably installed on the front of the panel 41, and the two ends of the transmission shaft 1 are respectively connected to the door handles 2 of the inner door handle unit and the outer door handle unit.

[0032] In this embodiment, the housing 4 is provided. By hiding and installing the mounting base 3 in the mounting cavity and surrounding the mounting base 3 with the housing 4, the mounting connection holes 34 are not exposed, thus effectively improving the beauty of the door lock; moreover, it can also effectively reduce the probability of external dirt entering the inside of the mounting base 3, prevent the external dirt from corroding and damaging the internal structural components of the inner door handle unit and the outer door handle unit, and further achieve the purpose of extending the service life of the door lock; in addition, a fastening structure is provided between the mounting base 3 and the housing 4, and they are fastened together by using the fastening structure, which has a simple structure and is convenient to install, and can effectively improve the installation efficiency of the door lock.

[0033] As a preferred embodiment, the fastening structure includes a fastening groove 100 provided on the wall of the mounting cavity and a fastening part 200 provided on the mounting base 3. When the mounting base 3 is installed in the mounting cavity, the fastening part 200 is buckled in the fastening groove 100, so that the mounting base 3 can be quickly buckled in the mounting cavity.

[0034] In this embodiment, in order to facilitate the removal of the cover 4 from the mounting base 3, the buckle groove 100 is located at the upper part of the installation cavity, the buckle portion 200 is located at the upper part of the mounting base 3, and a locking screw hole 420 penetrating and communicating with the installation cavity is provided at the bottom of the protective border 42. A first set screw 5 for locking the bottom of the mounting base 3 is in threaded fit in the locking screw hole 420. With this structure, only the upper part of the mounting base 3 is buckled to the cover 4, so that after the bolt is unscrewed, the cover 4 can be directly tilted upward and lifted, and the cover 4 can be separated from the mounting base 3. In addition, the locking screw hole 420 is located at the bottom of the protective border 42, which can hide both the locking screw hole 420 and the first set screw 5 and make them not easily visible to the user. This not only improves the aesthetics of the door lock, but also prevents external dirt such as water and dust from falling onto the locking screw hole 420 and the first set screw 5, thereby prolonging the service life of the first set screw 5.

[0035] In this embodiment, the cover 4 is square. The protective border 42 includes a top edge 421, a bottom edge 422 located below the top edge 421, and two side edges 423 located between the top edge 421 and the bottom edge 422. The top edge 421, the bottom edge 422, and the two side edges 423 are integrally connected to form a rectangular frame structure, and the locking screw hole 420 is provided on the bottom edge 422.

[0036] In this embodiment, there are at least two buckle portions 200, which are arranged on the top of the mounting base 3 from left to right. There are at least two buckle grooves 100, which are located at the bottom of the top edge 421. At least one buckle portion 200 is buckled in each buckle groove 100. By the cooperation of multiple buckle portions 200 and multiple buckle grooves 100, the stability of the upper part of the mounting base 3 buckled in the installation cavity is improved.

[0037] In this embodiment, a first reinforcing convex portion 44 and a second reinforcing convex portion 45 are provided in the installation cavity. Among them, the first reinforcing convex portion 44 connects the top surface of the bottom edge 422 to the back surface of the panel 41, thereby improving the structural stability of the bottom edge 422 and preventing the bottom edge 422 from being severely deformed when tightened by the first set screw 5, resulting in unstable installation of the mounting base 3, achieving the purpose of improving the installation stability of the mounting base 3; the second reinforcing convex portion 45 connects the bottom surface of the top edge 421 to the back surface of the panel 41, thereby improving the structural stability of the top edge 421 and preventing the top edge 421 from being severely deformed during the buckling process, resulting in unstable installation of the mounting base 3, achieving the purpose of improving the installation stability of the mounting base 3.

[0038] In this embodiment, in order to enable the first set screw 5 to better cooperate with the locking of the mounting base 3, a mounting cooperation portion 31 for cooperating with the first set screw 5 is provided at the bottom of the front end of the mounting base 3. When the first set screw 5 is tightened, the upper end of the first set screw 5 abuts against the mounting cooperation portion 31.

[0039] As a preferred embodiment, in order to improve the quality of the first top screw 5 locking the mounting fitting part 31, the mounting fitting part 31 is provided with a mounting positioning hole 32 for partial insertion of the first top screw 5. After tightening the first top screw 5, the top end of the first top screw 5 is inserted into the mounting positioning hole 32, and at the same time, the upper end of the first top screw 5 is against the bottom surface of the mounting fitting part 31, so that the bottom of the mounting seat 3 and the bottom of the cover shell 4 are firmly fixed together.

[0040] In this embodiment, a second extension protrusion 33 is provided on the left side or / and right side of the front end of the mounting seat 3, the lower end of the second extension protrusion 33 is connected to the mounting matching portion 31, and the upper end extends to the top of the mounting seat 3. The second extension protrusion 33 can enhance the structural stability of the mounting seat 3 and make the mounting seat 3 less susceptible to damage.

[0041] In this embodiment, a first extending protrusion 43 located in the installation cavity is protruded on the bottom edge 422, and the locking screw hole 420 extends from the bottom edge 422 and passes through the first extending protrusion 43. Through this structural design, the length of the locking screw hole 420 can be increased, and the first top screw 5 can be completely screwed upward into the locking screw hole 420, so that the lower end of the first top screw 5 is completely hidden in the locking screw hole 420.

[0042] As a preferred embodiment, a second through hole 40 is provided on the panel 41, and the second through hole 40 is communicated with the installation cavity and corresponds to the first through hole 30; a cover shaft portion 46 is provided on the back protrusion of the panel 41, and the second through hole 40 is arranged through the cover shaft portion 46; a connecting shaft 7 that rotates synchronously with the door handle 2 is provided on the door handle 2, one end of the connecting shaft 7 passes through the second through hole 40 and enters the installation cavity, and a connecting transmission hole is provided on one end of the connecting shaft 7, and the transmission shaft 1 cooperates in the connecting transmission hole to complete the transmission connection between the transmission shaft 1 and the door handle 2; a reset turntable 8 that rotates synchronously with the connection is provided on the connecting shaft 7, and the reset turntable 8 is located in the installation cavity; a reset torsion spring 9 is mounted on the cover shaft portion 46 for cooperating with the reset turntable 8 to enable the door handle 2 to reset after the door lock is rotated to open the door lock.

[0043] In this embodiment, a torsion spring limiting portion located in the installation cavity is provided on the back side of the panel 41, and a turntable transmission portion 81 is provided on the reset turntable 8. The two torsion arms of the reset torsion spring 9 are staggered to form a turntable matching position, and the torsion spring limiting portion and the turntable transmission portion 81 both extend into the turntable matching position. When the user rotates the door handle 2 by hand to open the door lock, one torsion arm of the reset torsion spring 9 abuts against the torsion spring limiting portion, and the door handle 2 drives the turntable transmission portion 81 on the reset turntable 8 to rotate and push the other torsion arm of the reset torsion spring 9 during the rotation process, so that the reset torsion spring 9 stores energy; after the user releases the door handle 2, the reset torsion spring 9 can release energy to link the door handle 2 to reset.

[0044] In this embodiment, a first rotation limiting portion 411 and a second rotation limiting portion 412 located in the installation cavity are further provided on the back surface of the panel 41; the turntable transmission portion 81 moves between the first rotation limiting portion 411 and the second rotation limiting portion 412; when the turntable transmission portion 81 abuts against the first rotation limiting portion 411 or the second rotation limiting portion 412 during the process of the user rotating the door handle 2 to open the door lock, the door handle 2 cannot continue to rotate, indicating that the door lock has been opened.

[0045] In this embodiment, a first connection hole is provided at one end of the door handle 2, and a handle connection portion 71 matching in the first connection hole is provided on the connecting shaft 7. The handle connection portion 71 and the door handle 2 are connected by a first bolt, so as to realize the connection between the door handle 2 and the connecting shaft 7. Further, the cross-sectional shapes of the first connection hole and the handle connection portion 71 are both polygons, such as squares, for facilitating their coaxial rotation. In addition, a connection limiting convex ring 72 is further provided on the outer peripheral surface of the connecting shaft 7. The connection limiting convex ring 72 is used to limit the connecting shaft 7 from completely passing through the second through hole 40. A limiting accommodation groove is provided at one end of the first connection hole close to the housing 4. At least a part of the end of the connection limiting convex ring 72 facing away from the housing 4 extends into the limiting accommodation groove, so that the axial thickness of the connection limiting convex ring 72 can be increased, the structural stability of the connection limiting convex ring 72 can be improved, and at the same time, the limiting accommodation groove is used to accommodate the connection limiting convex ring 72 to prevent the connection limiting convex ring 72 from protruding excessively and affecting the appearance of the door lock.

[0046] In this embodiment, the connecting shaft 7 passes through the central hole of the reset turntable 8. A reset clamping portion 83 is provided in the central hole of the reset turntable 8. A connection linkage groove 73 for inserting the reset clamping portion 83 is provided on the outer peripheral surface of the connecting shaft 7. The connecting shaft 7 and the reset turntable 8 can be interlocked and rotated based on the cooperation of the reset clamping portion 83 and the connection linkage groove 73. In addition, a turntable snap spring 10 for restricting the reset turntable 8 from axially disengaging from the connecting shaft 7 is further installed on the connecting shaft 7. The reset turntable 8 is located between the turntable snap spring 10 and the housing shaft portion 46.

[0047] In this embodiment, a connection transmission hole is provided on the connection shaft 7, and the end of the transmission shaft 1 is fitted in the connection transmission hole to complete the combination between the connection shaft 7 and the transmission shaft 1. Additionally, the cross-sectional shapes of the end of the transmission shaft 1 and the connection transmission hole are both polygonal, such as square, to facilitate their coaxial rotation. Further, a split notch 101 is provided at the end of the transmission shaft 1, and the end of the transmission shaft 1 is divided into two transmission shaft mounting parts 102 by the split notch 101. Both of the two transmission shaft mounting parts 102 are fitted in the connection transmission hole. A handle screw hole is provided on the door handle 2, and a connection shaft through hole with two ends respectively corresponding to the handle screw hole and the split notch 101 is provided on the handle connection part 71. The connection shaft through hole corresponds to the split notch 101. A second set screw 11 that is threadedly connected in the handle screw hole and extends into the split notch 101 after passing through the connection shaft through hole to expand the two transmission shaft mounting parts 102 is provided. After the two transmission shaft mounting parts 102 are expanded, they are abutted and fixed in the connection transmission hole, thereby completing the combined installation between the transmission shaft 1 and the connection shaft 7.

[0048] As a preferred embodiment, the inner handle unit and the outer handle unit both further include a locking structure for locking and resetting the reset turntable 8 so that the door handle 2 cannot rotate. The locking structure is provided in the installation cavity. The locking structure includes a locking slide base 12 and a ball component. A locking guide groove 300 is provided in the installation cavity, and the locking slide base 12 is guidingly fitted in the locking guide groove 300. In this embodiment, two oppositely arranged guiding convex parts 414 are provided on the back of the panel 41, and a limiting plate 19 is commonly connected to the backs of the two guiding convex parts 414. The locking guide groove 300 is formed by enclosing the back of the panel 41, the two guiding convex parts 414, and the limiting plate 19. A locking holding groove 301 and an unlocking holding groove 302 are provided in the locking guide groove 300. A locking matching part 82 is provided on the reset turntable 8, and a locking mounting hole and a locking matching groove 122 for cooperating with the locking matching part 82 to lock the reset turntable 8 are provided on the locking slide base 12. The ball component is provided in the locking mounting hole. The ball component includes a locking ball 13 for being caught in the locking holding groove 301 when the door handle 2 is locked and for being caught in the unlocking holding groove 302 when the door handle 2 is unlocked, and a locking spring 14 for driving the locking ball 13 to partially extend out of the locking mounting hole.

[0049] Furthermore, a synchronization structure for synchronously moving the locking slider 12 of the inner door handle unit and the locking slider 12 of the outer door handle unit is provided therebetween. An operation through-hole 401 is provided on the housing 4 of the inner door handle unit. An operation portion 121 extending from the operation through-hole 401 to the front surface of the housing 4 is provided on the locking slider 12 of the inner door handle unit. The user drives the locking sliders 12 of the two locking structures to move through the operation portion 121, so that the locking engagement groove 122 approaches or moves away from the locking engagement portion 82. When the locking ball 13 is snapped into the locking holding groove 301, the locking engagement portion 82 is inserted into the locking engagement groove 122 in a matching manner to limit the rotation of the door handle 2. When the locking ball 13 is snapped into the unlocking holding groove 302, the locking engagement groove 122 is separated from the reset turntable 8 to release the door handle 2, enabling the door handle 2 to rotate.

[0050] In this embodiment, the synchronization structure includes a first linkage member 15 and a second linkage member 16. The first linkage member 15 is installed on the locking slider 12 of the outer door handle unit, and the second linkage member 16 is installed on the locking slider 12 of the inner door handle unit. The first linkage member 15 and the second linkage member 16 are connected together in a threaded fit, so that the locking slider 12 of the inner door handle unit and the locking slider 12 of the outer door handle unit can move synchronously.

[0051] In this embodiment, a status display through-hole 402 is provided on the housing 4 of the outer door handle unit. An unlocking identification member 17 for indicating that the door handle 2 is unlocked and rotatable and a locking identification member 18 for indicating that the door handle 2 is locked and non-rotatable are provided on the locking slider 12 of the outer door handle unit. The unlocking identification member 17 and the locking identification member 18 are arranged vertically. When the locking slider 12 moves to the position where the door handle 2 is locked, the locking identification member 18 is aligned with the status display through-hole 402, while the unlocking identification member 17 is offset from the status display through-hole 402, so that external personnel can understand that the door handle 2 of the door lock is locked. When the locking slider 12 moves to the position where the door handle 2 is unlocked, the locking identification member 18 is offset from the status display through-hole 402, while the unlocking identification member 17 is aligned with the status display through-hole 402, so that external personnel can understand that the door handle 2 of the door lock is not locked.

[0052] The above are only the preferred embodiments of the present invention. As long as the technical solutions that achieve the purpose of the present invention by basically the same means fall within the protection scope of the present invention.

Claims

1. A concealed convenient door lock, comprising an inner handle unit, an outer handle unit and a transmission shaft (1), wherein the inner handle unit and the outer handle unit each comprise a door handle (2) and a mounting seat (3) for connecting to a door panel, wherein the mounting seat (3) is provided with a first through hole (30) for the transmission shaft (1) to pass through and at least one mounting connection hole (34), characterized in that: The inner handle unit and the outer handle unit both further comprise a cover shell (4) for concealing the mounting seat (3); the cover shell (4) comprises a panel (41) and a protective border (42) arranged around the outer contour of the back of the panel (41); the panel (41) and the protective border (42) form a mounting cavity located at the back of the cover shell (4); the mounting seat (3) is mounted in the mounting cavity; a snap-fitting structure for snapping the mounting seat (3) and the cover shell (4) together is arranged; the door handle (2) is rotatably mounted on the front of the panel (41); and the two ends of the transmission shaft (1) are respectively connected to the door handles (2) of the inner handle unit and the outer handle unit.

2. A concealed convenient installation door lock according to claim 1, characterized in that: The buckling structure comprises a buckling groove (100) provided on the wall of the installation cavity and a buckling portion (200) provided on the installation seat (3); when the installation seat (3) is installed in the installation cavity, the buckling portion (200) is buckled in the buckling groove (100).

3. A concealed convenient installation door lock according to claim 2, characterized in that: The buckle groove (100) is located at the upper part of the installation cavity, the buckle portion (200) is located at the upper part of the installation seat (3), and the bottom of the protective edge (42) is provided with a locking screw hole (420) that passes through and communicates with the installation cavity, and the locking screw hole (420) is threadedly matched with a first top screw (5) that locks the bottom of the installation seat (3).

4. A concealed convenient installation door lock according to claim 3, characterized in that: The protective surrounding edge (42) comprises a top edge (421), a bottom edge (422) located below the top edge (421), and two side edges (423) located between the top edge (421) and the bottom edge (422); the top edge (421), the bottom edge (422), and the two side edges (423) are integrally connected to form a square-shaped structure; and the locking screw hole (420) is provided on the bottom edge (422).

5. A concealed convenient installation door lock according to claim 4, characterized in that: The upper protrusion of the bottom edge (422) is provided with a first extending protrusion (43) located in the installation cavity, and the locking screw hole (420) extends from the bottom edge (422) and passes through the first extending protrusion (43).

6. A concealed convenient installation door lock according to claim 4, characterized in that: There are at least two buckle portions (200) disposed on the top of the mounting seat (3) from left to right, there are at least two buckle grooves (100) located at the bottom of the top edge (421), and at least one buckle portion (200) is buckled in each buckle groove (100).

7. A concealed convenient installation door lock according to claim 4, characterized in that: A first reinforcing protrusion (44) and a second reinforcing protrusion (45) are provided in the installation cavity, wherein the first reinforcing protrusion (44) connects the top surface of the bottom edge (422) and the back surface of the panel (41), and the second reinforcing protrusion (45) connects the bottom surface of the top edge (421) and the back surface of the panel (41).

8. A concealed convenient installation door lock according to any one of claims 2 to 7, characterized in that: The bottom of the front end of the mounting seat (3) is provided with a mounting fitting portion (31) for fitting with the first top screw (5); when the first top screw (5) is tightened, the upper end of the first top screw (5) is pressed against the mounting fitting portion (31).

9. A concealed convenient installation door lock according to claim 8, characterized in that: The installation matching portion (31) is provided with an installation positioning hole (32) for partially inserting the first top screw (5).

10. A concealed convenient installation door lock according to claim 8, characterized in that: A second extending protrusion (33) is provided on the left side or / and the right side of the front end of the mounting seat (3); the lower end of the second extending protrusion (33) is connected to the mounting matching portion (31), and the upper end extends to the top of the mounting seat (3).

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