Oblique latch lock for preventing insertion to open the door

Abstract

The present invention relates to an inclined tongue lock for preventing forced opening of a door, which comprises a lock shell provided with a tongue opening, a dial cam assembly and a tongue assembly. The tongue assembly includes an inclined tongue main body, and a tongue groove is formed on the non-inclined surface side of the inclined tongue main body. An anti-insertion driving tongue is swingably hinged in the tongue groove, and a stop portion cooperating with the inner side of the lock shell is provided on the anti-insertion driving tongue. In the door-opening state, the stop portion protrudes out of the tongue groove and abuts against the inner side of the lock shell to inhibit the outward acting force of the dial cam assembly, so that only the inclined tongue segment of the inclined tongue main body protrudes out of the tongue opening. In the door-closing state, the stop portion swings into the tongue groove and leaves the inner side of the lock shell to release the outward acting force of the dial cam assembly, so that the inclined tongue segment and a part of the tongue root segment in the inclined tongue main body protrude out of the tongue opening. When the inclined tongue lock is in the door-closing state, a small part of the tongue root segment in the inclined tongue main body protrudes out of the tongue opening, and the position of the door gap where the tongue root segment replaces the inclined tongue segment is used to play a role in preventing insertion, thereby improving the anti-theft performance of the door lock.

Description

Technical Field

[0001] The invention relates to the field of door locks, in particular to a latch lock for preventing a door from being opened by inserting. Background Art

[0002] At present, various types of electronic door locks on the market have various functions. The lock is generally provided with a main deadbolt and a tilted bolt combination. The tilted bolt assembly remains extended from the lock body, and the main deadbolt is generally a large square bolt. When the door is closed, the tilted bolt assembly automatically extends out of the lock body, and the main deadbolt completes the reverse locking by special door locking actions such as key, handle raising, etc. If the main deadbolt is forgotten to lock the door when closing the door, only the tilted bolt assembly will complete the door locking action when going out. At this time, a thin object such as a card is inserted into the door gap outside the door to try to retract the tilted bolt assembly, the door can be opened, and then the house can be broken into and stolen. Therefore, there is a great safety hazard. Therefore, the applicant provides a new solution that can prevent soft cards from being inserted and pushing open the movable deadbolt through the improvement and perfection of the existing door lock structure for consumers to choose and use. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned existing problems and provide a simple and reasonable anti-insertion door-opening inclined tongue lock, whose main function is to replace the door gap position of the inclined tongue section by the tongue root section, thereby playing a role of preventing insertion and improving the anti-theft performance of the door lock.

[0004] The invention discloses an anti-insertion door-opening inclined bolt lock, comprising a lock shell with a lock bolt opening, a peach assembly placed in the lock shell, and a lock bolt assembly driven by the peach assembly to move in and out along the lock bolt opening, wherein the lock bolt assembly comprises an inclined bolt body, wherein the inclined bolt body is provided with a tongue groove on the non-inclined side, an anti-insertion driving tongue is swingably hinged in the tongue groove, and a stop portion cooperating with the inner side of the lock shell is provided on the anti-insertion driving tongue, wherein in an open door state, the stop portion swings out of the tongue groove and abuts against the inner side of the lock shell to suppress the outward force of the peach assembly, so that only the inclined bolt segment of the inclined bolt body extends out of the lock bolt opening, and in a closed door state, the stop portion swings into the tongue groove and leaves the inner side of the lock shell to release the outward force of the peach assembly, so that the inclined bolt segment and part of the tongue root segment in the inclined bolt body extend out of the lock bolt opening.

[0005] The purpose of the present invention can also be solved by the following technical measures:

[0006] As a more specific solution, the tongue groove is laterally opened on the back side of the inclined tongue body, one end of the anti-insertion driving tongue is hinged in the tongue groove, and a return spring is also arranged between the inner side of the anti-insertion driving tongue and the bottom of the tongue groove. When the door is opened, the anti-insertion driving tongue is elastically swung out of the tongue groove by the return spring, and the stop portion is reset to the inside of the lock shell.

[0007] As a further solution, an elastic guide structure is provided on the peach assembly along the sliding direction of the inclined tongue body, and the inclined tongue body is movably connected to the elastic guide structure. Under the outward force of the elastic guide structure, the inclined tongue section and part of the tongue root section are pushed out of the lock tongue mouth.

[0008] As a further solution, the peach assembly includes a lock tongue peach rotatably connected to the lock housing and a drive seat driven to slide back and forth by the rotation of the lock tongue peach, the front end of the drive seat is transmission-connected to the inclined tongue body through a transmission assembly, and the rear end of the drive seat is elastically connected to the lock housing through a reset spring.

[0009] As a further solution, the transmission assembly includes a lock tongue plate and a shift fork swing arm fixedly connected in the lock housing, and a fixed pin is arranged on the lock tongue plate; the shift fork swing arm is rotatably connected to the fixed pin, and the front end of the drive seat can be moved forward and pushed on the resistance end of the shift fork swing arm, and a shift block is arranged on the rear end of the inclined tongue body, and the power end of the shift fork swing arm is shifted back and abuts against the shift block.

[0010] As a further solution, the lock tongue and peach include a cylinder with a square hole, and two peach lobes are symmetrically arranged on the cylinder, and the two peach lobes are both arranged on the rear half circle of the cylinder, and the corresponding drive seat is provided with a reverse stop surface and a forward stop surface that abut against the two peach lobes.

[0011] As a further solution, the elastic guide structure includes two guide rods connected to the lock tongue plate and arranged parallel to each other, and anti-insertion springs respectively inserted into the two guide rods; the inclined tongue body is provided with a long guide hole that linearly slides with the two guide rods and the anti-insertion spring; the inclined tongue body is lower than one end of the anti-insertion spring and generates an outward force through the anti-insertion spring.

[0012] As a further solution, the inner end of the anti-insertion drive tongue is provided with a shaft portion, the tongue groove is provided with an shaft groove that cooperates with the shaft portion, the outer end of the anti-insertion drive tongue is provided with a swing-in drive portion that enters and exits the tongue groove when swinging, and the stop portion is provided in the middle part or at the rear end of the anti-insertion drive tongue.

[0013] As a further solution, a front guiding bevel and a rear guiding bevel are provided on the swing-in driving portion, and a stop end surface is provided on the front side of the stop portion.

[0014] As a further solution, the tongue root section is also provided with a lock tongue anti-slip end surface which cooperates with the inner side of the lock housing.

[0015] The beneficial effects of the present invention are as follows:

[0016] The anti-insertion opening inclined tongue lock of the present invention. In the door-opening state of this inclined tongue lock, the stop portion on the anti-insertion driving tongue is pushed out of the tongue groove under the outward acting force of the return spring, so that the stop portion can keep abutting against the inner side of the lock case, restricting the length of the inclined tongue main body extending out of the lock tongue opening. Specifically, only the inclined tongue section with an inclined surface is provided. In the door-closed state, the anti-insertion driving tongue is pressed by the lock tongue box on the door frame, and the stop portion swings into the tongue groove and disengages from the inner side of the lock case. Under the acting force of the anti-insertion spring, the inclined tongue main body extends more out of the lock tongue opening, so that the tongue root section in the inclined tongue main body replaces the inclined tongue section at the door gap position. When a card is inserted, the card directly hits the surface of the tongue root section and no longer slides. Therefore, thinner objects such as cards cannot cut into the inclined surface of the tongue root section, thus playing a role in preventing insertion and improving the anti-theft performance of the door lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the present invention in the door-opening state.

[0018] Figure 2 It is a schematic cross-sectional structure diagram of the present invention in the anti-insertion state.

[0019] Figure 3 It is a schematic cross-sectional structure diagram of the inclined tongue main body of the present invention.

[0020] Figure 4 It is a schematic structure diagram of the dial peach assembly of the present invention.

[0021] Figure 5 It is a schematic diagram of the fully disassembled structure of the present invention.

[0022] Figure 6 It is a schematic diagram of the back structure of the inclined tongue main body of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be further described below with reference to the drawings and embodiments.

[0024] As Figures 1 to 6As shown, the anti-insertion door opening oblique bolt lock comprises a lock shell 1 with a lock bolt opening 101, a paddle assembly 2 placed in the lock shell 1, and a lock bolt assembly 3 driven by the paddle assembly 2 to move in and out along the lock bolt opening 101, the lock bolt assembly 3 comprises an oblique bolt body 4, the oblique bolt body 4 is provided with a tongue groove 401 on the non-inclined side, an anti-insertion driving tongue 5 is swingably hinged in the tongue groove 401, and the anti-insertion driving tongue 5 is provided with a stopper 51 matched with the inner side of the lock shell 1. When the door is open, the stop portion 51 swings out of the tongue groove 401 and abuts against the inner side of the lock case 1 to suppress the outward force of the nut assembly 2, so that only the oblique tongue segment 41 of the oblique tongue body 4 extends out of the lock tongue opening 101. When the door is closed, the stop portion 51 swings into the tongue groove 401 and leaves the inner side of the lock case 1 to release the outward force of the nut assembly 2, so that the oblique tongue segment 41 and part of the tongue root segment 42 in the oblique tongue body 4 extend out of the lock tongue opening 101.

[0025] When the door is closed, a small portion of the root section 42 of the oblique bolt body extends out of the bolt opening 101, and the root section 42 replaces the oblique bolt section 41 in the door gap, thereby playing a role of inserting and releasing, thereby improving the anti-theft performance of the door lock.

[0026] The tongue groove 401 is laterally opened on the back side of the inclined tongue body 4, one end of the anti-insertion driving tongue 5 is hinged in the tongue groove 401, and a reset spring 6 is further arranged between the inner side of the anti-insertion driving tongue 5 and the bottom of the tongue groove 401. In the door opening state, the anti-insertion driving tongue 5 is elastically swung out of the tongue groove 401 by the reset spring 6, and the stop portion 51 is reset to the inner side of the lock housing 1; the tongue groove 401 is opened on the back side of the inclined surface 411 of the inclined tongue section 41, so that when a card or other tool is inserted into the door gap, the anti-insertion driving tongue 5 cannot be operated along the inclined surface 411.

[0027] In addition, spring grooves 501 and 4011 are provided on the inner side of the anti-insertion driving tongue 5 and the bottom of the tongue groove 401, and both ends of the reset spring 6 are limitedly positioned in the spring grooves 501 and 4011 for positioning and matching.

[0028] An elastic guiding structure is provided on the peach assembly 2 along the sliding direction of the inclined tongue body 4, and the inclined tongue body 4 is movably connected to the elastic guiding structure. Under the outward force of the elastic guiding structure, the inclined tongue segment 41 and part of the tongue root segment 42 are pushed out of the lock tongue opening 101; the elastic guiding structure can support the inclined tongue body 4 and ensure its linear movement, and when the inclined tongue body 4 slides back and forth, it is not necessary to drive the peach assembly 2 to move.

[0029] The peach assembly 2 includes a lock tongue peach 7 rotatably connected to the lock housing 1 and a drive seat 8 which is driven to slide forward and backward by the rotation of the lock tongue peach 7. The front end of the drive seat 8 is transmission-connected to the inclined tongue body 4 through a transmission assembly, and the rear end of the drive seat 8 is elastically connected to the lock housing 1 through a reset spring 9. After the lock tongue peach 7 drives the drive seat 8 to move forward, the reset spring 9 can pull the drive seat 8 backward to automatically reset the drive seat 8.

[0030] The rear end of the driving seat 8 is provided with two front tension spring hooks 81, one end of the reset tension spring 9 is hung on the front tension spring hook 81, and the tail of the lock housing 1 is provided with two rear tension spring hooks 102, the other end of the reset tension spring 9 is hung on the rear tension spring hook 102.

[0031] The transmission assembly includes a bolt plate 10 and a fork swing arm 11 fixedly connected in the lock housing 1, and a fixed pin 12 is arranged on the bolt plate 10; the fork swing arm 11 is rotatably connected to the fixed pin 12, and the front end of the driving seat 8 can be moved forward to push against the resistance end 111 of the fork swing arm 11, and the rear end of the oblique bolt body 4 is provided with a toggle block 13, and the power end 112 of the fork swing arm 11 is shifted back to abut against the toggle block 13;

[0032] The front end of the driving seat 8 is also provided with a pushing block 82. When the driving seat 8 is driven to move forward, the pushing block 82 pushes the resistance end 111 of the shift fork swing arm 11 from the rear, so that the shift fork swing arm 11 rotates. During the rotation, the power end 112 of the shift fork swing arm 11 will swing backward and push the pushing block 13, so that the inclined tongue body 4 moves backward and retracts into the lock housing 1.

[0033] The lock tongue and peach 7 includes a cylinder 71 with a square hole 72, and two peach convex corners 73 are symmetrically arranged on the cylinder 71. The two peach convex corners 73 are both arranged on the rear semicircle of the cylinder 71, and the corresponding driving seat 8 is provided with a reverse stop surface 801 and a forward stop surface 802 that abut against the two peach convex corners 73; this structure enables the lock tongue and peach 7 to drive the driving seat 8 to move forward when rotating forward or reverse.

[0034] In addition, the lock housing 1 is further provided with an internal thread column 15 for connecting the left and right lock housings. The internal thread column 15 can also cooperate with the two lobes 73 to limit the maximum rotation angle of the two lobes 73.

[0035] The elastic guiding structure includes two guiding rods 1001 connected to the locking tongue plate 10 and arranged parallel to each other, and anti-insertion springs 14 respectively inserted into the two guiding rods 1001; the inclined tongue body 4 is provided with a guiding long hole 402 which linearly slides with the two guiding rods 1001 and the anti-insertion spring 14, the inclined tongue body 4 is lower than one end of the anti-insertion spring 14, and generates an outward force through the anti-insertion spring 14; the structure generates an elastic force on the inclined tongue body 4 through the anti-insertion spring 14, and the two guiding rods 1001 can prevent the inclined tongue body 4 from axial rotation and play a guiding role when it is extended and retracted forward and backward.

[0036] The inner end of the anti-insertion driving tongue 5 is provided with a shaft portion 52, and the tongue groove 401 is provided with a shaft groove 403 that cooperates with the shaft portion 52. The outer end of the anti-insertion driving tongue 5 is provided with a swing-in driving portion 53 that enters and exits the tongue groove 401 when swinging, and the stop portion 51 is arranged in the middle part of the anti-insertion driving tongue 5; the swing-in driving portion 53 can cooperate with the lock tongue box on the door frame when closing the door, thereby pressing the entire anti-insertion driving tongue 5 to swing into the tongue groove 401.

[0037] The swing-in driving portion 53 is provided with a front guiding inclined surface 531 and a rear guiding inclined surface 532, and the front side of the stop portion 51 is provided with a stop end surface 511; when the swing-in driving portion 53 is extended and retracted forward and backward along the lock tongue opening 101 through the front guiding inclined surface 531 and the rear guiding inclined surface 532, the entry and exit of the inclined tongue body 4 will not be affected; and the stop end surface 511 can be pressed against the inner side of the lock shell 1 face to face.

[0038] The tongue root section 42 is also provided with a lock tongue anti-slip end surface 421 that cooperates with the inner side of the lock housing 1; since the forward movement limit of the inclined tongue body 4 mainly relies on the cooperation between the fork swing arm 11 and the toggle block 13, when the fork swing arm 11 is dislocated, the inclined tongue body 4 is easily pushed out of the lock tongue mouth under the action of the anti-insertion spring 14, so the lock tongue anti-slip end surface 421 plays a safety role, and the lock tongue anti-slip end surface 421 limits the maximum forward movement of the inclined tongue body 4.

[0039] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A latch bolt lock for preventing a door from being opened by insertion, comprising a lock housing (1) having a latch bolt opening (101), a latch bolt assembly (2) disposed in the lock housing (1), and a latch bolt assembly (3) driven by the latch bolt assembly (2) to move in and out along the latch bolt opening (101), Features: The lock bolt assembly (3) comprises a latch bolt body (4), the latch bolt body (4) being provided with a tongue groove (401) on the non-slanted side, an anti-insertion driving tongue (5) being swingably hinged in the tongue groove (401), and the anti-insertion driving tongue (5) being provided with a stop portion (51) cooperating with the inner side of the lock housing (1); in an open door state, the stop portion (51) swings out of the tongue groove (401) and abuts against the inner side of the lock housing (1) to suppress the outward force of the paddle assembly (2), so that only the latch bolt section (41) of the latch bolt body (4) extends out of the lock bolt opening (101); in a closed door state, the stop portion (51) swings into the tongue groove (401) and leaves the inner side of the lock housing (1) to release the outward force of the paddle assembly (2), so that the latch bolt section (41) and part of the tongue root section (42) in the latch bolt body (4) extend out of the lock bolt opening (101); The tongue groove (401) is laterally formed on the back side of the oblique tongue body (4); one end of the anti-insertion driving tongue (5) is hinged in the tongue groove (401); and a return spring (6) is provided between the inner side of the anti-insertion driving tongue (5) and the bottom of the tongue groove (401); in the door opening state, the anti-insertion driving tongue (5) is elastically swung out of the tongue groove (401) by the return spring (6), and the stop portion (51) is returned to the inner side of the lock housing (1); An elastic guide structure is provided on the peach assembly (2) along the sliding direction of the oblique tongue body (4); the oblique tongue body (4) is movably connected to the elastic guide structure, and under the outward force of the elastic guide structure, the oblique tongue section (41) and part of the tongue root section (42) are pushed out of the lock tongue opening (101); The lock peach assembly (2) comprises a lock tongue lock peach (7) rotatably connected to the lock housing (1) and a drive seat (8) driven to slide forward and backward by the rotation of the lock tongue lock peach (7), the front end of the drive seat (8) being transmission-connected to the inclined tongue body (4) via a transmission assembly, and the rear end of the drive seat (8) being elastically connected to the lock housing (1) via a return tension spring (9).

2. The anti-insertion door latch according to claim 1, Features: The transmission assembly comprises a bolt plate (10) and a fork swing arm (11) fixedly connected in a lock housing (1); a fixed pin shaft (12) is arranged on the bolt plate (10); the fork swing arm (11) is rotatably connected to the fixed pin shaft (12); a front end of the drive seat (8) can be moved forward to push against a resistance end (111) of the fork swing arm (11); a toggle block (13) is arranged at a rear end of the oblique bolt body (4); a power end (112) of the fork swing arm (11) is moved back to abut against the toggle block (13).

3. The anti-insertion door latch according to claim 1, Features: The tongue ejecting cam (7) includes a cylinder (71) with a square hole (72) formed therein. Two ejecting cam convex corners (73) are symmetrically arranged on the cylinder (71). Both of the two ejecting cam convex corners (73) are arranged on the rear semi-circle of the cylinder (71), and a reverse stop surface (801) and a forward stop surface (802) which are abutted against the two ejecting cam convex corners (73) are arranged on the corresponding driving seat (8).

4. The inclined tongue lock for preventing insertion and opening the door according to claim 2, characterized in that: The elastic guiding structure includes two guiding rods (1001) which are connected to the tongue plate (10) and arranged in parallel with each other, and an anti-insertion spring (14) sleeved on the two guiding rods (1001) respectively; a guiding long hole (402) which is in linear sliding fit with the two guiding rods (1001) and the anti-insertion spring (14) is formed on the inclined tongue body (4), and one end of the inclined tongue body (4) which is lower than the anti-insertion spring (14) generates an outward acting force through the anti-insertion spring (14).

5. The inclined tongue lock for preventing insertion and opening the door according to claim 1, characterized in that: A shaft portion (52) is arranged at the inner end of the anti-insertion driving tongue (5), a shaft groove (403) which is matched with the shaft portion (52) is arranged in the tongue groove (401), a swing-in driving portion (53) which enters and exits the tongue groove (401) during swinging is arranged at the outer end of the anti-insertion driving tongue (5), and the stop portion (51) is arranged at the middle portion or the rear end of the anti-insertion driving tongue (5).

6. The inclined tongue lock for preventing insertion and opening the door according to claim 5, characterized in that: A front guiding inclined surface (531) and a rear guiding inclined surface (532) are arranged on the swing-in driving portion (53), and a stop end surface (511) is arranged at the front side of the stop portion (51).

7. The inclined tongue lock for preventing insertion and opening the door according to claim 1, characterized in that: A tongue anti-disengagement end surface (421) which is matched with the inner side of the lock shell (1) is further formed on the tongue root section (42).

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