Door lock safety spring bolt opening and closing transmission mechanism
By improving the linkage plate and rotating swing arm structure of the door lock, the automatic retraction and locking of the safety bolt is achieved, solving the problems of easy damage to the secondary bolt and the constant closure of fire doors, thus improving the security and durability of the door lock.
Patent Information
- Application Number
- CN202423128040.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-18
AI Technical Summary
In existing door locks, the secondary bolt (safety bolt) is prone to collision and damage with the door frame when the door is half-closed, and it is difficult to guarantee that the fire door is closed at all times, which poses safety hazards and has a short service life.
A door lock safety bolt opening and closing transmission mechanism was designed. It adopts an oblique bolt design and achieves automatic retraction and locking of the safety bolt through the linkage of the first, second and third linkage plates and the rotating swing arm, so as to avoid collision with the door frame. The locking status is controlled by the lock cylinder or key.
It effectively prevents the safety latch from colliding and being damaged by the door frame, improves the safety and durability of the door lock, ensures that the fire door automatically closes and locks, and improves the overall reliability and service life.
Smart Images
Figure CN223608331U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to door lock field especially relates to a more safe, durable door lock safety lock tongue opening and closing transmission mechanism. BACKGROUND
[0002] At present, there are many kinds of door locks, among which the door locks used in houses and buildings are more common. Such door locks generally have a main lock tongue, which is of the inclined lock tongue type and can realize the linear extension and retraction function of the lock tongue through rotating the inner and outer handles and the reset spring. In the normal state, the main lock tongue is in the extended state to realize the locking operation by hitting the door. However, there is a risk that the door will be pried open by a card only by relying on the inclined lock tongue to lock the door, so a secondary lock tongue is generally configured to realize the reverse locking function. The secondary lock tongue is also called "dead tongue" or "safety lock tongue" and is in the form of a straight lock tongue, such as a square tongue or a cylindrical tongue. The secondary lock tongue is controlled to linearly extend and retract by the lock cylinder, the linkage mechanism, and the reset spring, and is positioned to extend or retract by the clamping structure between the linkage mechanisms. Here, the lock cylinder has two ways to control the movement of the lock tongue, namely, a rotary knob and a keyhole. Among them, the rotary knob is arranged in the house for the operation of the people inside the house; the keyhole is installed on the outside of the house for the use of the key by the people outside the house. However, when such door locks are applied to specific scenarios, the following defects exist: 1. In the case of half-closed door and extended secondary lock tongue, the secondary lock tongue cannot automatically retract, and once subjected to external force, it is easy to collide with the door frame, thereby causing damage. The specific performance is that the straight lock tongue is deformed and worn, and the internal parts are loose. In this way, the reliability of the door lock as a whole will be greatly reduced, and the service life will also be significantly shortened. This shortcoming is particularly prominent in heavy fireproof doors; 2. The regulations of fireproof door use in various countries clearly stipulate that the fireproof door must be kept closed and cannot be opened or locked at will to ensure that it can effectively block the fire when a fire occurs. However, due to the non-standard operation of the management personnel or others, the standby lock is opened and not reset in time, causing the fireproof door to be in a half-closed state. This situation not only causes the door lock to collide and be damaged, but also causes a fire hazard, resulting in serious consequences that are difficult to recover.
[0003] The present inventor has thus designed the invention based on years of experience in the field of locks, taking into account the optimization of the structure of the product, and has made the invention after many trials and improvements. SUMMARY
[0004] To overcome the defects and shortcomings of the prior art, the utility model provides a door lock safety lock tongue opening and closing transmission mechanism. The mechanism can realize the automatic retraction function of the safety lock tongue and has high safety and durability.
[0005] In order to achieve the above object, the utility model provides a door lock safety lock tongue opening and closing transmission mechanism, it is equipped with the oblique lock tongue, first linkage board, second linkage board, third linkage board and rotary swing arm as the safety lock tongue on the lock body, the oblique lock tongue is connected with the front end of first linkage board, first linkage board can reciprocate along the movement direction of oblique lock tongue, and is connected with first reset spring, is equipped with the abutting portion in the rear end of first linkage board, second linkage board is located below the position of first linkage board, and reciprocates with the movement mode of first linkage board, the rear end of second linkage board can be mutually resisted in the stroke of reciprocation with the abutting portion, is equipped with first positioning recess and second positioning recess on one side of second linkage board, wherein, second positioning recess is equipped with the slope surface that transitions to first recess, is equipped with the recess groove that is linked with lock cylinder on the other side of second linkage board, third linkage board is located below the position of second linkage board, it can reciprocate horizontally, and is also equipped with second reset spring and positioning convex part, positioning convex part can be inserted into first positioning recess or second positioning recess, is used for stroke restraint to second linkage board, rotary swing arm moves in the swing mode, one end is linked with the transmission mechanism of handle, the other end can be touched with first linkage board or second linkage board, to push first linkage board or second linkage board to generate corresponding movement.
[0006] The utility model further provides a door lock safety lock tongue opening and closing transmission mechanism, the surface of first linkage board is equipped with first guide hole, and is equipped with first limit post in first guide hole, the opposite sliding displacement is formed between first limit post and first guide hole, the surface of second linkage board is equipped with the second guide hole of sleeve in first limit post, and simultaneously, is equipped with the second limit post of fixed surface of second linkage board, the bottom end of this second limit post is placed in the third guide hole that is opened on the lock body, makes the opposite sliding displacement between third guide hole and second limit post, the surface of third linkage board is equipped with the fourth guide hole of staggered arrangement with second guide hole, this fourth guide hole is also sleeve on first limit post, and simultaneously, still set up the fifth guide hole in parallel with fourth guide hole on the surface of third linkage board, is equipped with the third limit post of fixed on the lock body in this fifth guide hole, makes the opposite sliding displacement between fifth guide hole and third limit post.
[0007] The utility model further provides a door lock safety lock tongue opening and closing transmission mechanism, when oblique lock tongue is connected with first linkage board, is equipped with connecting column body in the back position of oblique lock tongue, is equipped with annular recess on the surface of this connecting column body, correspondingly, first linkage board is equipped with a bending part, the middle position of this bending part is equipped with the fork mouth of fork type structure, the inside of both sides of fork mouth is inserted into annular recess.
[0008] Compared with the prior art, the utility model discloses the sub -lock tongue (that is, the safety lock tongue) with the anti -locking function is changed into the oblique lock tongue design, make it have the same door -banging back -retraction characteristic with the main lock tongue.
[0009] In the first scheme, by means of the operation of the rotary handle, the rotating swing arm and the first linkage plate are driven to contact, and then the first linkage plate is pushed to slide and displace rearward, thereby driving the oblique lock tongue to retract.In this process, the second linkage plate and the third linkage plate are in a static state and do not participate in linkage cooperation.When the handle is released, the first linkage plate returns to the initial position under the action of its own return spring, and the oblique lock tongue also extends accordingly.In the entire process, the activity of the first linkage plate within its stroke range is not restricted, so on the basis of this structure and function, even without the operation of the handle, the safety lock tongue can realize door-banging retraction and automatic extension and complete locking.
[0010] In the second scheme, by means of the operation of the rotary handle, the rotating swing arm and the second linkage plate are driven to contact, and then the second linkage plate is pushed to slide and displace rearward, and when the rear part of the second linkage plate and the abutting part of the first linkage plate abut against each other, force transmission occurs between them, pushing the first linkage plate to move rearward.Meanwhile, the third linkage plate slides and displaces laterally under the pushing force of the second linkage plate, and in this process, the positioning convex part originally located in the second positioning recess slides into the first positioning recess by means of the slope, and by means of this structure cooperation mechanism, the position of the second linkage plate is locked, thereby locking the retracted safety lock tongue in the lock body.On the basis of this structure, even without the active operation of the handle, the safety lock tongue can still realize door-banging retraction function based on its structural characteristics and linkage mechanism, and unlocking needs to be controlled by using the knob or key of the lock cylinder.
[0011] By means of the above two technical means, the rigid collision between the safety lock tongue and the door frame can be effectively avoided.In this way, the safety lock tongue and its internal parts can be prevented from being damaged, the automatic masking and locking function of the fireproof door can be realized, and the safety and durability of the door lock and the door of the house, the fireproof door and other doors can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is the internal structure diagram of the embodiment one of the utility model.
[0013] Figure 2 It is the partial explosion drawing of the embodiment one of the utility model.
[0014] Figure 3 This is a partial exploded view of Embodiment 2 of this utility model.
[0015] Figure 4 This is a structural diagram showing the connection between the safety lock tongue and the first linkage plate of this utility model.
[0016] Reference numerals: 1—Safety latch; 2—First return spring; 3—First linkage plate; 4—Second linkage plate; 5—Third linkage plate; 6—Second return spring; 7—Rotating swing arm; 8—Connecting column; 9—Annular groove; 30—Bent body; 31—Extension part; 32—First guide hole; 33—Abutting part; 34—Fork; 40—Second limiting post; 41—Second guide hole; 42—Shaft three; 43—Groove; 44—Second positioning notch; 45—Slope; 46 —First positioning notch; 50—Fourth guide hole; 51—Positioning protrusion; 52—Third limiting post; 53—Fifth guide hole; 54—Extension rod; 70—Hook-shaped body; 71—Shaft 1; 72—Straight rod part; 100—Main bolt; 101—Lock body panel; 102—Bottom shell; 103—Connecting plate; 104—Third return spring; 105—Handle transmission mechanism; 106—Seat; 107—Pulley; 108—Third guide hole; 123—First limiting post. Implementation
[0017] To make the invention objective, technical solution and beneficial effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0018] like Figure 1 , Figure 2 As shown in Embodiment 1, a door lock safety bolt opening and closing transmission mechanism is provided. Its structure includes: a safety bolt 1 and a transmission mechanism for driving the safety bolt to extend and retract, thus achieving its locking and opening / closing functions. The safety bolt is housed in the keyhole below the lock body panel 101 and can move linearly within the keyhole. The safety bolt is designed with an angled bolt to ensure it has a door-collision retraction characteristic, effectively reducing the risk of damage to the safety bolt and its associated components due to rigid impact. The transmission mechanism for the safety bolt includes: a first linkage plate 3, a second linkage plate 4, a third linkage plate 5, and a rotating swing arm 7, all of which are installed within the bottom shell 102 of the lock body and fixedly connected to a cover plate adapted to the bottom shell.
[0019] The first linkage plate 3 is designed in a long strip shape, the front end of which is designed to be connected with the safety lock tongue 1, and the connection mode can adopt the traditional welding, riveting or other connection modes with reliable fixing effect. At the same time, an extension part 31 extending towards the main lock tongue 100 is arranged at the front end, and a bending body 30 towards the lock body panel is arranged on the extension part. A first guide hole 32 vertically arranged along the length direction is formed on the surface of the first linkage plate, and a first limiting column 123 fixed to the bottom shell and the cover plate is arranged in the first guide hole. The guide path and constraint provided by the first guide hole and the first limiting column enable the first linkage plate to slide linearly in a specific direction. A downwardly bent right-angle abutting part 33 is arranged at the rear end of the first linkage plate, which is designed in an "L" shape. In addition, the first linkage plate is also provided with a first return spring 2, which is designed in a torsional spring structure and is firmly installed in the bottom shell. During the connection and assembly, one end of the torsional spring is in abutting contact with the front end of the first linkage plate, and the other end is in abutting contact with other corresponding parts of the bottom shell. Through the action of the torsional spring, the first linkage plate can smoothly realize the return action after completing the corresponding sliding displacement.
[0020] The second linkage plate 4 is located below the first linkage plate 3, and the surface thereof is also provided with a vertical guide hole, referred to as the second guide hole 41. The second guide hole is in a corresponding relationship with the first guide hole 32 on the surface of the first linkage plate, and the two are concentric hole structures in spatial layout. When the second linkage plate is assembled, the second guide hole is sleeved on the first limiting column 123, and the relative sliding displacement is formed between the two. Through the design of the second guide hole, the second linkage plate can perform linear sliding displacement reciprocating motion in the same motion direction as the first linkage plate. When the second linkage plate slides backward to the preset stroke position, the rear end of the second linkage plate abuts against the abutting portion 33 at the rear end of the first linkage plate, thereby pushing the first linkage plate to slide backward together, and pulling the safety lock tongue 1 to retract. A second limiting column 40 fixedly connected with the second linkage plate is arranged on the bottom surface of the second linkage plate, and the end of the second limiting column away from the second linkage plate is arranged in a third guide hole 108 arranged on the surface of the bottom shell 102 and parallel to the second linkage plate. The second limiting column and the third guide hole form a stable supporting relationship and a relative sliding displacement, and provide guidance and limiting constraint for the sliding displacement of the second linkage plate. A first positioning notch 46 and a second positioning notch 44 are arranged on the left side (upper side in the figure) of the second linkage plate, and the inner side of the second positioning notch is provided with a slope surface 45 that transitions to the first notch. In addition, a groove 43 associated with the lock cylinder is arranged on the right side (lower side in the figure) of the second linkage plate, and the groove corresponds to the pull wheel 107 of the lock cylinder. The driving force generated by the pull wheel acting on the groove can push the second linkage plate 4 to slide, and the rotation of the pull wheel can be controlled by the knob or key on the lock cylinder.
[0021] The third linkage plate 5 is located below the third linkage plate, and its surface is provided with a fourth guide hole 50 and a fifth guide hole 53 arranged laterally and parallel to each other. The fourth guide hole is staggered with the second guide hole 41 of the second linkage plate, and the fourth guide hole is also fitted onto the first limiting post 123. This allows the first, second, and third linkage plates to form a corresponding sliding displacement linkage mechanism. A third limiting post 52, fixed to the bottom shell, is provided within the fifth guide hole, and relative sliding displacement is also formed between the two. Through the guiding path and constraints provided by the fourth and fifth guide holes and their limiting posts, the third linkage plate can slide laterally in a preset specific direction. In addition, the third linkage plate is also provided with a second return spring 6 and a positioning protrusion 51. The second return spring is fitted onto an extension rod 54, which extends outward from the side of the third linkage plate and is supported and fixed by a seat 106 fixed to the bottom shell 102. The positioning protrusion 51 can be engaged in the first positioning recess 46 or the second positioning recess 44 of the second linkage plate. When the second linkage plate slides, the first limiting post pushes the third linkage plate to slide laterally. During this process, the positioning protrusion can orderly alternate between the two positioning recesses to lock the stroke position of the second linkage plate and realize the extension and retraction control and positioning function of the lock tongue.
[0022] The rotating swing arm 7 is a transmission component in the shape of a "curved rod". Its two ends are supported by a shaft 71 and it can rotate and swing around the shaft 71 axis. A shaft 2 is fixed at one end of the rotating swing arm. This shaft 2 contacts and transmits power to the output end of the handle transmission structure. A hook 70 is provided at the other end of the rotating swing arm. This hook can hook onto the bent body 30 of the first linkage plate. Thus, by swinging the rotating swing arm, the first linkage plate is pushed to slide backward, causing the safety lock tongue to retract or extend.
[0023] like Figure 3 As shown, Embodiment 2 provides a door lock safety latch opening and closing transmission mechanism, whose overall structure is basically the same as that of Embodiment 1. The difference between the two is that the rotating swing arm 7 in Embodiment 2 is a transmission component in the shape of a "curved rod". Its two ends are supported by shaft 1 71 and can rotate and swing around shaft 1. One end of the rotating swing arm is fixed with shaft 2. This shaft 2 contacts and transmits power to the output end of the handle transmission structure. The other end of the rotating swing arm is a straight rod part 72, which contacts shaft 3 42. Shaft 3 is fixed to the bottom of the second linkage plate 4. Thus, by swinging the rotating swing arm, the second linkage plate is pushed to slide backward. At the same time, the positioning protrusion 51 of the third linkage plate 5 changes from being initially locked in the second positioning recess 44 to being locked in the first positioning recess 46, thereby driving the safety latch to retract and lock.
[0024] As Figure 4 shown, more preferably, in the structure design of the connection between the dead bolt 1 and the first linkage plate 3, a connecting column 8 is arranged at the back of the dead bolt, and an annular groove 9 is processed on the surface of the connecting column. Correspondingly, a bent part is arranged at the front end of the first linkage plate, and a fork 34 with a fork structure is designed at the middle part of the bent part. During the installation process, the two inner sides of the fork can be accurately clamped into the annular groove. Through this structure, the dead bolt and the first linkage plate are two independent components, and the precise matching connection between the annular groove and the fork of the two components effectively improves the convenience and operability of the two components during the assembly and subsequent maintenance process, and reduces the assembly difficulty and maintenance cost.
[0025] In order to better understand the working mode of the utility model, the following further detailed description is made in combination with the drawings and other components of the door lock.
[0026] As Figure 1 , Figure 2As shown in the attached diagram, the working process of Embodiment 1 is described as follows: Taking the visual aspect of the attached diagram as an example, in the initial state, both the main latch 100 and the safety latch 1 are in the extended state. When it is necessary to perform the latch retraction operation, the handle is rotated clockwise to the unlocking stroke position. At this time, one end of the handle's transmission mechanism 105 applies a pulling force to the main latch's connecting plate 103, causing the main latch to retract; while the other end of the transmission mechanism contacts one end of the rotating swing arm 7, pushing the rotating swing arm to swing. The hook-like body 70 of the rotating swing arm then hooks onto the bent body 30 of the first linkage plate, thereby pushing the first linkage plate 3 to slide backward. During this process, the second linkage plate 4 and the third linkage plate 5 are in a stationary state and do not participate in the linkage cooperation. The safety latch will retract synchronously with the main latch, thus completing the unlocking operation; conversely, if the handle is released, its transmission mechanism will be simultaneously subjected to the force generated by the third return spring 104 of the main latch and the first return spring 2 of the first linkage plate of the safety latch, thereby completing the automatic reset action. Correspondingly, the main bolt and the safety bolt will also automatically extend, achieving automatic locking. Based on this structure, since the movement of the first linkage plate within its travel range is not constrained, the safety bolt has the characteristics of retracting upon impact and automatically extending. Manual operation of the safety bolt for deadbolt or locking is required. This can be achieved by controlling the lever 107 to swing within the lock cylinder using a knob or key. The lever acts on the groove 43 of the second linkage plate, generating driving force and pushing the second linkage plate to slide. Simultaneously, the third linkage plate is subjected to the force of the first limiting post 123 and the second return spring 6, causing it to slide laterally. The positioning protrusion 51 of the third linkage plate will then engage between the first positioning recess 46 and the second positioning recess 44 of the second connecting plate. When the positioning protrusion is within the second positioning recess, the safety bolt is extended; when the positioning protrusion is within the first positioning recess, the safety bolt is retracted and locked, unable to extend. Therefore, in this embodiment, the movement of the safety bolt can be achieved through both automatic extension and retraction and manual control extension / retraction.
[0027] like Figure 3As shown, the working process of the second embodiment is described as follows: the difference between the second embodiment and the first embodiment is that the rotating swing arm 7 acts on the second linkage plate 4. In the initial state, the main lock tongue 100 and the safety lock tongue 1 are both in the extended state. The handle is rotated in the clockwise direction to the unlocking stroke position, and at the same time the main lock tongue is retracted, the straight rod part 72 of the rotating swing arm exerts a pushing force on the shaft three 42 of the second linkage plate, which promotes the sliding displacement of the second linkage plate backward. Due to the specific mechanical connection and transmission association between the linkage plates, the sliding displacement of the second linkage plate further drives the first linkage plate 3 to produce corresponding sliding displacement, so that the safety lock tongue 1 is also retracted. At this time, the positioning convex part 51 of the third linkage plate 5 will slide along the slope surface of the second positioning notch 44 and be clamped into the first positioning notch 46, thereby locking the position of the second linkage plate, so that the safety lock tongue cannot automatically extend after retraction. Therefore, after the handle is released, only the main lock tongue will extend under the action of the reset mechanism. If the safety lock tongue needs to be extended, the knob or key on the lock cylinder needs to be used to control the extension and locking action of the safety lock. In addition, if the transmission mechanism is not operated by the handle and the lock cylinder, since the first linkage plate is not constrained and limited in the initial state, it can freely slide and displace, so the safety lock tongue in this embodiment also has the characteristics of door impact retraction and automatic extension.
[0028] Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
Claims
1. A door lock keeper opening and closing transmission mechanism, characterized by: The lock body is provided with an oblique lock tongue as a safety lock tongue (1), a first linkage plate (3), a second linkage plate (4), a third linkage plate (5) and a rotating swing arm (7). The oblique lock tongue is connected with the front end of the first linkage plate. The first linkage plate can reciprocate along the movement direction of the oblique lock tongue and is connected with a first return spring (2). The rear end of the first linkage plate is provided with an abutting portion (33). The second linkage plate is located below the first linkage plate and reciprocates in the same way as the first linkage plate. The rear end of the second linkage plate can abut against the abutting portion in the reciprocating stroke. The first and second positioning notches (46 and 44) are provided on one side of the second linkage plate. The second positioning notch is provided with a slope (45) which transitions to the first notch. The recess (43) which is linked with the lock cylinder is provided on the other side of the second linkage plate. The third linkage plate is located below the second linkage plate and can reciprocate horizontally. The third linkage plate is also provided with a second return spring (6) and a positioning protrusion (51). The positioning protrusion can be clamped into the first or second positioning notches to restrict the stroke of the second linkage plate. The rotating swing arm (7) swings and is connected with the transmission mechanism of the handle on one end and can abut against the first or second linkage plate on the other end to push the first or second linkage plate to move correspondingly.
2. The deadbolt actuating mechanism of claim 1, wherein: The surface of the first linkage plate (3) is provided with a first guide hole (32) and a first limiting column (123) in the first guide hole. The first limiting column and the first guide hole form relative sliding displacement. The surface of the second linkage plate (4) is provided with a second guide hole (41) which is sleeved on the first limiting column. Meanwhile, a second limiting column (40) is fixed on the bottom surface of the second linkage plate. The bottom end of the second limiting column is placed in a third guide hole (108) which is opened on the lock body, so that the third guide hole and the second limiting column form relative sliding displacement. The surface of the third linkage plate (5) is provided with a fourth guide hole (50) which is staggered with the second guide hole. The fourth guide hole is also sleeved on the first limiting column. Meanwhile, a fifth guide hole (53) which is parallel to the fourth guide hole is arranged on the surface of the third linkage plate. The fifth guide hole is provided with a third limiting column (52) which is fixed on the lock body, so that the fifth guide hole and the third limiting column form relative sliding displacement.
3. The dead bolt actuating mechanism of claim 1 or 2, wherein the dead bolt actuating mechanism further comprises a spring disposed between the dead bolt and the actuator. 5 When the oblique lock tongue is connected with the first linkage plate, a connecting column (8) is arranged on the back of the oblique lock tongue. A ring-shaped recess (9) is arranged on the surface of the connecting column. Correspondingly, the first linkage plate is provided with a bent portion. A fork (34) which is in a fork structure is arranged on the middle portion of the bent portion. The inner sides of the two sides of the fork are clamped into the ring-shaped recess.