Bolt lock for door

Abstract

The utility model provides a bolt lock for a door, which relates to the technical field of door locks and comprises a shell, a surface cover and a moving part, an installation cavity is formed between the shell and the surface cover, a spring bolt assembly is arranged in the installation cavity in a sliding mode, the surface cover is provided with a first avoiding groove along the sliding direction of the spring bolt assembly, and the moving part penetrates through the first avoiding groove to be connected with the spring bolt assembly. The spring bolt assembly comprises a sliding piece, the end of the sliding piece is connected with a plug pin, and inner teeth are arranged on the inner side of the sliding piece and connected with a gear cylinder in an engaged mode. The safety bolt has the beneficial effects that the structural arrangement of the sliding piece can achieve better surrounding and restraining effects when the inner teeth are meshed with the gear cylinder, and compared with a traditional rack and a traditional gear, the safety bolt is more compact in structure and can effectively guarantee the moving accuracy of the safety bolt; when the shell, the face cover and the spring bolt assembly are assembled together, the arch bridge portion of the spring piece can abut against the inner surface of the face cover so that the spring bolt assembly and the face cover can have packing force, and therefore the position of the spring bolt assembly is fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a latch lock for a door. Background Art

[0002] With the continuous improvement of economic level, public toilets have also been widely used. Public toilets are important places for people to solve private problems outdoors. Their flow of people and stay time are relatively complex. In order to ensure the safety of public toilets, public toilets usually need to install door locks to prevent others from opening the public toilet door when someone is using it.

[0003] In the prior art, the Chinese patent document (Announcement No.: CN209195193U, Patent Name: A Locking Door Lock Structure for a Mobile Toilet) discloses in its technical solution that “a slot is provided in the door body, a pair of slide bars are provided in the door body at the upper end of the slot through a first sliding structure, a rack is fixedly installed at the lower end of the slide bar, a gear is provided for transmission at the lower end of the rack, a rotating shaft is fixedly installed in the middle of the gear, and the rotating shaft passes through one side of the door body and extends outside the door body, one end of the rack is fixedly installed with a limit block, a limit slot is provided in the toilet body adjacent to the limit block, a probe is fixedly installed on the toilet body in the limit slot, a first connecting plate is fixedly installed at the other end of the rack, active push blocks are fixedly installed on both sides of the first connecting plate, a rectangular slot is provided on both sides of the door body adjacent to the active push block, a driven push block is slidably provided in the rectangular slot, and the driven push block and the door body are connected by a second sliding structure, a spring is fixedly installed between the driven push block and the door body, and the spring is located in the rectangular slot.”

[0004] Combined with the description and drawings of the patent document, by rotating the rotating plate, the rotating plate drives the rotating shaft to rotate, the rotating shaft drives the gear to rotate, the gear rotates the transmission rack, and the rack drives the limit block into the limit groove, thereby completing the door closing operation. However, the gear and rack are not installed compactly enough, and there is a gap between the teeth, which will lead to reduced transmission accuracy and easy backlash during reverse movement. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides a latch lock for a door. The accuracy of the movement of the latch can be ensured through the transmission of gears and internal teeth, making the latch lock structure more compact.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] A latch lock for a door comprises a shell, a face cover and a moving part, wherein an installation cavity is formed between the shell and the face cover, a lock tongue assembly is slidably arranged in the installation cavity, a first avoidance groove is provided on the face cover along the sliding direction of the lock tongue assembly, the moving part passes through the first avoidance groove and is connected to the lock tongue assembly, the lock tongue assembly comprises a sliding part, a latch is connected to the end of the sliding part, an inner side of the sliding part is provided with internal teeth, and the inner teeth are meshed with a gear cylinder.

[0008] Furthermore, grooves are provided on both sides above the sliding member, and a clamping component is provided in the groove. The clamping component is a spring piece, the middle part of the spring piece is in the shape of an arch bridge, and the two ends are flatly pressed against the two ends of the groove in the compressed state.

[0009] Furthermore, the gear cylinder includes a gear, which is connected to the cylinder body. The gear reciprocates in the internal teeth, and the switch closing state can be identified by the position of the gear in the internal teeth; the shell is provided with a mounting cylinder, and the cylinder body is inserted into the mounting cylinder.

[0010] Furthermore, a connecting hole is provided between adjacent slots, the movable part is connected to the connecting hole, a second avoidance groove is provided on one side of the connecting hole, and an avoidance opening is provided on the other side of the connecting hole; the length direction of the second avoidance groove is the same as the length direction of the first avoidance groove.

[0011] Furthermore, a first fixed tube is provided on one side of the mounting tube, and a third fixed tube is provided on the other side of the mounting tube. The first fixed tube corresponds to the second avoidance groove, and the third fixed tube corresponds to the avoidance opening. The upper ends of the first fixed tube and the third fixed tube are both provided with protruding edges.

[0012] Furthermore, first openings are provided on both sides of the first avoidance groove, and inclined surfaces are provided around the first openings; when the face cover is mounted on the shell, the protruding edges are inserted into the first openings and protrude upwards from the inclined surfaces.

[0013] Furthermore, a lock shell is provided on the side of the shell, a lock cover is provided above the lock shell, and an insertion interface is provided between the lock shell and the lock cover, and the insertion interface corresponds to the latch.

[0014] Furthermore, second openings are provided on both sides of the lock cover, and second fixing cylinders are provided on both sides of the lock shell, and the second fixing cylinders correspond to the second openings.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The structural setting of the sliding part can achieve a better encirclement and restraint effect when the internal teeth and the gear cylinder are engaged. Compared with the traditional rack and gear, the structure is more compact and can effectively ensure the accuracy of the movement of the bolt; the tightening component is a spring. When the shell, the face cover and the lock tongue assembly are assembled together, the arch bridge part of the spring will be tightly pressed against the inner surface of the face cover to create a tightening force between the lock tongue assembly and the face cover, thereby fixing the position of the lock tongue assembly, making the position of the lock tongue assembly not easy to loosen, making the bolt lock structure more stable and convenient and quick to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is an overall diagram of a door latch lock according to an embodiment of the present utility model;

[0019] Figure 2 This is a cross-sectional view of a door latch lock according to an embodiment of the present utility model;

[0020] Figure 3 This is a partial schematic diagram of a door latch lock according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the lock tongue assembly of the utility model embodiment Figure 1 ;

[0022] Figure 5 This is a schematic diagram of the lock tongue assembly of the utility model embodiment Figure 2 ;

[0023] Figure 6 2 is a schematic diagram of a housing of an embodiment of the present utility model;

[0024] Figure 7 It is a schematic diagram of the lock housing, lock cover and plug interface of an embodiment of the present utility model.

[0025] In the figure: 1-housing, 101-mounting cylinder, 102-first fixed cylinder, 103-third fixed cylinder, 104-protrusion, 2-face cover, 201-first avoidance groove, 202-first opening position, 203-bevel, 3-lock tongue assembly, 301-sliding member, 3011-inner tooth, 3012-slot, 3013-connecting hole, 3014-second avoidance groove, 3015-avoidance opening, 302-latch, 303-gear cylinder, 3031-gear, 3032-cylinder, 4-moving member, 5-tightening component, 6-lock housing, 601-second fixed cylinder, 7-lock cover, 701-second opening position, 8-plug interface. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0027] like Figures 1 to 4 As shown, a door latch lock includes a shell 1, a cover 2 and a moving part 4. An installation cavity is formed between the shell 1 and the cover 2. A lock tongue assembly 3 is slidably arranged in the installation cavity. The cover 2 is provided with a first avoidance groove 201 along the sliding direction of the lock tongue assembly 3. The moving part 4 passes through the first avoidance groove 201 and is connected to the lock tongue assembly 3. A tightening component 5 is provided between the lock tongue assembly 3 and the cover 2. The lock tongue assembly 3 includes a sliding part 301. The end of the sliding part 301 is connected to a bolt 302. The inner side of the sliding part 301 is provided with internal teeth 3011. The inner teeth 3011 are meshed with a gear cylinder 303. When the structural setting of the sliding part 301 allows the inner teeth 3011 and the gear cylinder 303 to mesh, it has a better encirclement and restraint effect. Compared with the traditional rack and gear, this structure can reduce the shaking and displacement caused by the gap between the teeth during operation.

[0028] Specifically, if Figures 3 to 5 As shown, slots 3012 are provided on both sides above the sliding member 301, and a tightening component 5 is provided in the slot 3012. In this embodiment, the tightening component 5 is a spring piece, the middle part of the spring piece is in the shape of an arch bridge, and the two ends are flatly pressed against the two ends of the slot 3012 in the compressed state. When the shell 1, the face cover 2 and the lock tongue assembly 3 are assembled together, the arch bridge part of the spring piece will be tightly pressed against the inner surface of the face cover 2 so that there is a tightening force between the lock tongue assembly 3 and the face cover 2, thereby fixing the position of the lock tongue assembly 3. When the user pushes the moving member 4 so that the applied force is greater than the tightening force, the lock tongue assembly 3 will be released and slide accordingly in the installation cavity, so that the lock tongue assembly 3 can be extended or retracted into the shell 1. This embodiment has a stable structure and is easy to use.

[0029] The gear cylinder 303 includes a gear 3031, which is connected to a cylinder body 3032. The gear 3031 reciprocates in the inner teeth 3011, and the position of the gear 3031 in the inner teeth 3011 can be used to identify the switch closing state; the shell 1 is provided with a mounting cylinder 101, and the cylinder body 3032 is plugged into the mounting cylinder 101. The cylinder body 3032 is hollow and plugged or sleeved with an identifier, or a two-color identification is directly applied. The identifier or the two-color identification can switch the identification according to the toilet usage status, and is linked to the sliding member 301 through the gear 3031. When the sliding member 301 moves, it will drive the gear 3031 to rotate. The rotation of the gear 3031 will cause the identifier or the two-color identification to switch between the occupied identification sign and the unoccupied identification sign.

[0030] A connecting hole 3013 is provided between adjacent slots 3012, the movable part 4 is connected to the connecting hole 3013, a second avoidance groove 3014 is provided on one side of the connecting hole 3013, and an avoidance opening 3015 is provided on the other side of the connecting hole 3013; the length direction of the second avoidance groove 3014 is the same as the length direction of the first avoidance groove 201, a first fixed cylinder 102 is provided on one side of the mounting cylinder 101, and a third fixed cylinder 103 is provided on the other side of the mounting cylinder 101, the first fixed cylinder 102 corresponds to the second avoidance groove 3014, and the third fixed cylinder 103 corresponds to the avoidance opening 3015, so that the sliding part 301 will not be hindered when moving.

[0031] A lock shell 6 is provided on the side of the housing 1 , a lock cover 7 is provided above the lock shell 6 , and an insertion port 8 is provided between the lock shell 6 and the lock cover 7 , and the insertion port 8 corresponds to the latch 302 .

[0032] The specific operation of the latch lock is as follows: when locking the door, the moving part 4 is pushed to move the moving part 4 to one end of the first avoidance groove 201, and the sliding part 301 is driven to move horizontally accordingly, so as to drive the latch 302 to extend out of the shell 1 and be plugged into the plug interface 8. At the same time, the inner teeth 3011 are engaged with the gear 3031, and the movement of the inner teeth 3011 drives the gear 3031 to rotate, and the gear 3031 drives the identifier to rotate, so that the identifier is switched to a person identification card. When opening the door, the moving part 4 is pushed to move the moving part 4 to the other end of the first avoidance groove 201, and the sliding part 301 is driven to move horizontally accordingly, so as to drive the latch 302 away from the plug interface 8 and retract into the shell 1. At the same time, the inner teeth 3011 are engaged with the gear 3031, and the movement of the inner teeth 3011 drives the gear 3031 to rotate, so that the identifier is switched to an unmanned identification card.

[0033] like Figure 6 As shown, the upper ends of the first fixing tube 102 and the third fixing tube 103 are both provided with a protrusion 104, and the first opening position 202 is provided on both sides of the first avoidance groove 201, and the first opening position 202 is provided with a bevel 203 around it; when the face cover 2 is installed on the shell 1, the protrusion 104 is inserted into the first opening position 202 and protrudes upward from the bevel 203. After being punched by a riveting machine, the protrusion 104 is bent and deformed under the action of pressure, that is, it is folded outward, and the bevel 203 after being flanging will fit tightly with the bevel 203 to fix the face cover 2 on the shell 1. Finally, two bolts are used to pass through the first fixing tube 102 and the third fixing tube 103 respectively, so that the face cover 2 and the shell 1 can be fixed to the door.

[0034] like Figure 7As shown, second opening positions 701 are provided on both sides of the lock cover 7, and second fixing cylinders 601 are provided on both sides of the lock shell 6. The second fixing cylinders 601 correspond to the second opening positions 701. The lock cover 7 and the lock shell 6 can be fixed to the door frame by using bolts to pass through the second opening positions 701 and the second fixing cylinders 601 in sequence.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A door latch lock, characterized in that: The invention comprises a housing (1), a cover (2) and a moving part (4); an installation cavity is formed between the housing (1) and the cover (2); a lock tongue assembly (3) is slidably arranged in the installation cavity; a first avoidance groove (201) is provided on the cover (2) along the sliding direction of the lock tongue assembly (3); the moving part (4) passes through the first avoidance groove (201) and is connected to the lock tongue assembly (3); the lock tongue assembly (3) comprises a sliding part (301); a latch pin (302) is connected to the end of the sliding part (301); an inner tooth (3011) is provided on the inner side of the sliding part (301); and the inner tooth (3011) is meshedly connected to a gear cylinder (303).

2. The door latch lock according to claim 1, wherein: Grooves (3012) are provided on both sides above the sliding member (301), and a tightening component (5) is provided in the groove (3012). The tightening component (5) is a spring sheet, the middle part of which is in the shape of an arch bridge, and the two ends thereof are flatly pressed against the two ends of the groove (3012) in a compressed state.

3. The door latch lock according to claim 2, characterized in that: The gear cylinder (303) includes a gear (3031), the gear (3031) is connected to a cylinder (3032), the gear (3031) reciprocates in the inner teeth (3011), and the switch closed state can be identified by the position of the gear (3031) in the inner teeth (3011); the housing (1) is provided with a mounting cylinder (101), and the cylinder (3032) is plugged into the mounting cylinder (101).

4. The door latch lock according to claim 3, wherein: A connecting hole (3013) is provided between adjacent slots (3012), the movable member (4) is connected to the connecting hole (3013), a second avoidance groove (3014) is provided on one side of the connecting hole (3013), and a avoidance opening (3015) is provided on the other side of the connecting hole (3013); the length direction of the second avoidance groove (3014) is the same as the length direction of the first avoidance groove (201).

5. The door latch lock according to claim 4, characterized in that: A first fixing cylinder (102) is provided on one side of the installation cylinder (101), and a third fixing cylinder (103) is provided on the other side of the installation cylinder (101). The first fixing cylinder (102) corresponds to the second avoidance groove (3014), and the third fixing cylinder (103) corresponds to the avoidance opening (3015). The upper ends of the first fixing cylinder (102) and the third fixing cylinder (103) are both provided with a protruding edge (104).

6. The door latch lock according to claim 5, characterized in that: First opening positions (202) are provided on both sides of the first avoidance groove (201), and inclined surfaces (203) are provided around the first opening position (202); when the face cover (2) is mounted on the shell (1), the protruding edge (104) is inserted into the first opening position (202) and protrudes upward from the inclined surface (203).

7. The door latch lock according to claim 1, wherein: A lock shell (6) is provided on the side of the housing (1), a lock cover (7) is provided above the lock shell (6), and an insertion interface (8) is provided between the lock shell (6) and the lock cover (7), and the insertion interface (8) corresponds to the latch (302).

8. The door latch lock according to claim 7, characterized in that: The lock cover (7) is provided with second opening positions (701) on both sides, and the lock housing (6) is provided with second fixing cylinders (601) on both sides, and the second fixing cylinders (601) correspond to the second opening positions (701).

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