A push-type three-point fireproof lock

Abstract

The invention discloses a flat-push three-point fireproof lock, comprising a base plate, a base shell, a pressure rod driving mechanism between the base plate and the base shell, and a holding mechanism for keeping the pressure rod driving mechanism in a normally open state, and also comprising a lock rod and a lock tongue driven by the pressure rod driving mechanism, the lock rod is penetrated in the base shell, the lock tongue is hinged at the end of the base shell, the pressure rod driving mechanism comprises a pressure rod, a second fan plate and a second fan plate which are rotatably arranged at the ends on both sides of the base shell, the ends of the first fan plate and the second fan plate are overlapped and hinged through a transmission pin, the pressure rod is driven against the bottom of the transmission pin, the pressure rod drives the transmission pin to make the first fan plate and the second fan plate relatively close and open, the lock rod rises or falls with the first fan plate or the second fan plate being closed, the lock tongue is closed with the first fan plate and is retracted into the base shell, the up and down movement of the lock rod is synchronized with the lock tongue, three-locking point locking is realized, and mirror assembly can be achieved without replacing parts.

Description

Technical Field

[0001] The invention relates to the technical field of wiring terminals, and in particular to a flat-push three-point fireproof lock. Background Art

[0002] At present, door and window locks used in public places need to be able to be opened quickly in the event of an accident, and fire locks need to remain in a normally closed state under normal conditions. Most of the fire locks in the prior art are limited to setting a lock tongue on one side of the pressure rod structure, or setting an upper locking rod and a lower locking rod in the lock body, and the upper locking rod and the lower locking rod are driven to extend and retract through the pressure rod structure, thereby realizing the opening and closing of the fire lock. Therefore, the pressure rod structure inside the fire lock needs to drive each locking member separately, resulting in more parts and a more complicated structure. At the same time, the action of the lock tongue switching from the normally open state to the normally closed state is not smooth, and the operation is inconvenient. There are also problems such as inconvenient assembly and high cost. In addition, the fire door locks in the prior art need to distinguish between left-opening doors and right-opening doors, and are not very applicable to different scenarios. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a flat-push three-point fireproof lock, which has a simple structure, is easy to assemble and can achieve synchronous driving of the three locking points of the fireproof lock.

[0004] The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a flat-push three-point fireproof lock, comprising a base plate, a base shell arranged on the base plate, a pressure rod driving mechanism hinged between the base plate and the base shell, and a holding mechanism for keeping the pressure rod driving mechanism in a normally open state, and also comprising a locking rod and a lock tongue driven by the pressure rod driving mechanism, the locking rod being passed through the base shell, the lock tongue being hinged at the end of the base shell, the pressure rod driving mechanism comprising a pressure rod, a second fan plate and a second fan plate which are rotatably arranged at the ends on both sides of the base shell, the ends of the first fan plate and the second fan plate being overlapped and hinged by a transmission pin, the pressure rod being driven against the bottom of the transmission pin, the pressure rod driving the transmission pin to make the first fan plate and the second fan plate relatively retract and open, the locking rod rises or falls as the first fan plate or the second fan plate is retracted, and the lock tongue is retracted as the first fan plate is retracted and retracted into the base shell.

[0005] Furthermore, the first fan plate is arranged close to the lock tongue, a blocking strip abutting against the first fan plate or the second fan plate is provided at the middle of the lock rod, and a supporting arm abutting against the lock tongue is extended from the first fan plate.

[0006] Furthermore, a first swing arm is provided at the bottom of the first fan plate, and a second swing arm is provided at the bottom of the second fan plate. The first swing arm and the second swing arm are symmetrically arranged with respect to the transmission pin, and the baffle is against the inner side of the first swing arm or the second swing arm. Through the above improvements, the locking rod is driven by the first swing arm or the second swing arm, and both the first swing arm and the second swing arm can drive the locking rod to rise or fall, thereby adapting to different locking positions in different scenarios.

[0007] Furthermore, the base shell has a first mounting position and a second mounting position that are symmetrically arranged. The first swing arm is against the baffle bar in the first mounting position to drive the locking rod to rise or fall, and the second swing arm is against the baffle bar in the second mounting position to drive the locking rod to rise or fall. The first swing arm and the second swing arm drive the baffle bar to keep moving in the same direction in the first mounting position or the second mounting position.

[0008] Furthermore, a pin is provided on one side of the lock tongue, and a guide step is provided on the support arm. The guide step and the end face of the support arm form an angle for positioning the pin. Through the above improvements, the pin is lifted by the support arm, and the pin is pressed against the guide step of the support arm, thereby increasing the stability of the pin on the support arm and reducing the movement of the pin or the first fan plate during the action of the lock tongue.

[0009] Furthermore, the retaining mechanism includes a rotor arranged on a base shell, a limit member rotating synchronously with the rotor, and a limit plate arranged on a pressure rod, the rotor drives the limit member to abut against the limit plate to keep the fire lock in a normally open state, the end of the limit member abuts against the end surface of the limit plate at a point contact, and the rotation axis of the limit member and the contact end points of the limit member and the limit plate are both maintained on the center line of the base shell.

[0010] Furthermore, the pressure rod includes a transmission part extending out of the base shell, a holding part abutting against the holding mechanism, and a driving part abutting against the transmission pin. The holding part is arranged on one side of the hinged end of the pressure rod, and the driving part is arranged on the other side of the hinged end of the pressure rod. The limit plate is arranged on the holding part and extends toward the limit member. Through the above improvements, the end of the limit plate is relatively close to the limit member in the vertical direction, which is conducive to the limit member being quickly popped open by the limit plate when switching to the normally closed state.

[0011] Furthermore, the limit plate is symmetrically arranged in an "L" shape about the center line of the base shell, and the end of the limit plate is bent and provided with an arc surface. Through the above improvements, when switching from the normally closed state to the normally open state, the small end of the limit member always remains tangent to the arc surface at the end of the limit plate, the limit plate is subjected to stable force, and the cooperation is smoother and more stable.

[0012] Furthermore, a positioning groove is provided on the mating end faces of the limit plate and the limit piece, and the limit piece has an arc portion, and the positioning groove and the arc portion are stacked about the center line of the base shell, and the limit piece is tangent to the limit plate when the fire lock is in the normally open state, and the end point of the arc portion is inserted into the positioning groove. Through the above improvement, a positioning groove is provided on the limit plate, and the small end portion of the limit piece is inserted into the positioning groove in the normally open state, which provides a crisp prompt sound after the normally open state is in place, and increases the stability of the limit piece, so that the limit piece is not easily opened by a light touch, and the curvature of the positioning groove is greater than the curvature of the small end of the limit piece, so that the limit piece and the positioning groove still maintain point contact, and when the fire lock switches from the normally open state to the normally closed state, the arcs on both sides of the groove wall of the positioning groove provide guidance for the limit piece, which is convenient for operation without applying excessive force.

[0013] Furthermore, through grooves are provided on both sides of the upper part of the base shell, and hanging ears are integrally extended on the groove walls of the through grooves. The ends of the first fan plate and the second fan plate are rotatably arranged on the hanging ears, and the rotating ends of the first fan plate and the second fan plate and the support arm are exposed at the through grooves. Through the above improvements, the through grooves and hanging ears are formed by grooving and flanging, which reduces the number of assembly parts and increases the compactness of the structure. In addition, the transmission parts of the first fan plate, the second fan plate and the support arm can be observed, oiled and debugged through the through grooves without removing the entire base shell, and the operation is simple and convenient.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The inner ends of the first fan plate and the second fan plate are superimposed on each other and connected by a transmission pin, and the outer ends of the first fan plate and the second fan plate are rotatably arranged on the base shell. When the pressure rod is driven, the transmission part of the pressure rod is lifted and drives the transmission pin to be lifted. Under the constraint of the transmission pin, the first fan plate and the second fan plate rotate around their rotation axis points on the base shell, so that the first fan plate and the second fan plate are retracted against each other, and the transmission part is released to return the transmission pin to open the first fan plate and the second fan plate to each other, wherein the support arm is synchronously lifted with the first fan plate and drives the lock tongue to be retracted into the base shell, and the lock rod is driven to rise or fall by the first swing arm or the second swing arm, thereby using fewer parts to simultaneously drive the upper locking point, the lower locking point and the side locking point to move, and the structure is simple and the force is stable.

[0015] 2. The first installation position and the second installation position correspond to the installation positions of the fire lock on both sides of the door and window frames. When the fire lock is in the first installation position, the first leaf plate abuts against the baffle on the lock rod, so that it drops when the first leaf plate is folded, and is lifted up and reset when the first leaf plate is opened; when the fire lock is in the second installation position, the position of the lock rod is swapped, and the second leaf plate abuts against the baffle on the lock rod, so that it drops when the second leaf plate is folded, and is lifted up and reset when the second leaf plate is opened. In the first installation position and the second installation position, the lock drive rod can be lifted or lowered, thereby realizing the mirrored use of the fire lock, greatly improving the applicability of the fire lock and reducing production costs.

[0016] 3. When switching from the normally open state to the normally closed state, the vertically rotating limit piece disengages from the positioning groove, that is, the small end of the limit piece leaves the center line of the base shell and forms a certain angle with the direction of the elastic force of the pressure rod. The force applied by the limit plate to the limit piece is converted into a force to drive the limit piece to rotate. The limit piece is a plate-shaped planar component, and the arc-shaped small end portion plays a guiding role, so that the limit piece can be quickly popped open, thereby reducing the jamming between the limit piece and the pressure rod, making the switching action of the normally open and normally closed fire locks smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the present invention after the base shell is removed (fire lock is normally closed);

[0019] Figure 3 This is a schematic diagram of the structure of the present invention after the base shell is removed (the fire lock is normally open);

[0020] Figure 4 It is a schematic diagram of the explosion structure of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the first installation position of the present invention;

[0022] Figure 6 is a structural schematic diagram of the second installation position of the present invention;

[0023] In the figure: 1, bottom plate; 2, base shell; 2.1, through groove; 2.2, hanging ear; 3, locking rod; 3.1, stop bar; 4, locking tongue; 5, pressure rod; 5.1, transmission part; 5.2, holding part; 5.3, driving part; 6, first fan plate; 6.1, support arm; 6.2, guide step; 7, second fan plate; 8, transmission pin; 9, first swing arm; 10, second swing arm; 11, column pin; 12, rotor; 13, limiter; 14, limiter plate; 14.1, arc surface; 14.2, positioning groove; DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0026] like Figure 1-6 As shown, a push-type three-point fireproof lock comprises a bottom plate 1, a base shell 2 arranged on the bottom plate 1, a pressure rod driving mechanism hinged between the bottom plate 1 and the base shell 2, and a holding mechanism for keeping the pressure rod driving mechanism in a normally open state, and also comprises a lock rod 3 and a lock tongue 4 driven by the pressure rod driving mechanism, the lock rod 3 is passed through the base shell 2, the lock tongue 4 is hinged at the end of the base shell 2, a rotating shaft is passed through the lock tongue 4, and reset torsion springs are arranged at both ends of the rotating shaft, and the ends of the reset torsion springs are against the base shell 2, wherein the lock rod 3 is An upper lock buckle structure is correspondingly provided at the upper end, and a lower lock buckle structure is correspondingly provided at the lower end of the lock rod 3. The upper lock buckle structure and the lower lock buckle structure can be driven to open with the lock rod 3 descending, and vice versa, the upper lock buckle structure and the lower lock buckle structure can also be driven to open with the lock rod 3 lifting. The above-mentioned upper lock buckle structure and the lower lock buckle structure are common sky and earth lock structures in the market, and are not described here. The cooperation between the lock tongue 4 and the reset torsion spring is also a conventional structure, which is not shown in the figure. The figure only shows the installation position of the upper shaft of the lock tongue 4;

[0027] The pressure rod driving mechanism includes a pressure rod 5, a transmission pin 8, a first leaf plate 6 and a second leaf plate 7, wherein the first leaf plate 6 is arranged close to the lock tongue 4, the pressure rod 5 includes a transmission part 5.1 extending out of the base shell 2, a holding part 5.2 abutting against the holding mechanism and a driving part 5.3 abutting against the transmission pin 8, the holding part 5.2 is arranged on one side of the hinged end of the pressure rod 5, and the driving part 5.3 is arranged on the other side of the hinged end of the pressure rod 5, the pressure rod 5 is hinged on the bottom plate 1, the outer end of the first leaf plate 6 is rotatably arranged on the base shell 2, and the outer end of the second leaf plate 7 is rotatably arranged on the base shell 2. The side end is rotatably arranged on the base shell 2, the inner ends of the first fan plate 6 and the second fan plate 7 are overlapped with each other, the transmission pin 8 is passed through the overlapping part of the first fan plate 6 and the second fan plate 7, the transmission part 5.1 is pressed to lift the driving part 5.3, so that the driving part 5.3 abuts against the transmission pin 8 and drives the transmission pin 8 to make the first fan plate 6 and the second fan plate 7 relatively close and open, and the middle part of the lock rod 3 is provided with a baffle bar 3.1 abutting against the first fan plate 6 or the second fan plate 7, and the first fan plate 6 is extended with a support arm 6.1 abutting against the lock tongue 4.

[0028] Specifically, a first swing arm 9 is provided at the bottom of the first fan plate 6, and the first swing arm 9 is arranged at the bottom of the outer end corresponding to its rotating part. A second swing arm 10 is provided at the bottom of the second fan plate 7, and the second swing arm 10 is arranged at the bottom of the outer end corresponding to its rotating part. The first swing arm 9 and the second swing arm 10 are symmetrically arranged about the transmission pin 8, and the blocking bar 3.1 is abutted against the inner side of the first swing arm 9 or the second swing arm 10. The locking rod 3 is driven by the first swing arm 9 or the second swing arm 10. The first swing arm 9 and the second swing arm 10 can both drive the locking rod 3 to lift or lower, thereby adapting to different locking positions in different scenarios.

[0029] Specifically, the base shell 2 has a first mounting position and a second mounting position that are symmetrically arranged. The first mounting position and the second mounting position correspond to the mounting positions of the fire lock on both sides of the door and window frames, that is, correspond to the left and right positions on the door and window frames. The first swing arm 9 is in the first mounting position against the baffle 3.1 to drive the lock rod 3 to rise or fall, and the second swing arm 10 is in the second mounting position against the baffle 3.1 to drive the lock rod 3 to rise or fall. The first swing arm 9 and the second swing arm 10 drive the baffle 3.1 to keep moving in the same direction in the first mounting position or the second mounting position.

[0030] When the lock rod 3 moves downward to open the upper lock catch structure and the lower lock catch structure, in the first installation position of the fireproof lock, the stop bar 3.1 on the lock rod 3 abuts against the inner side wall of the first swing arm 9, the first swing arm 9 is retracted and drives the lock rod 3 to descend, and the support arm 6.1 is synchronously lifted with the first leaf plate 6 and drives the lock tongue 4 to be retracted; in the second installation position of the fireproof lock, the stop bar 3.1 on the lock rod 3 abuts against the inner side wall of the second swing arm 10, the second swing arm 10 is retracted and drives the lock rod 3 to descend, and the support arm 6.1 is synchronously lifted with the first leaf plate 6 and drives the lock tongue 4 to be retracted;

[0031] When the locking rod 3 rises to open the upper locking structure and the lower locking structure, in the first installation position of the fireproof lock, the blocking bar 3.1 on the locking rod 3 abuts against the inner side wall of the second swing arm 10, the second swing arm 10 retracts and drives the locking rod 3 to descend, and the support arm 6.1 is synchronously lifted with the first fan plate 6 and drives the lock tongue 4 to be retracted; in the second installation position of the fireproof lock, the blocking bar 3.1 on the locking rod 3 abuts against the inner side wall of the first swing arm 9, the first swing arm 9 retracts and drives the locking rod 3 to rise, and the support arm 6.1 is synchronously lifted with the first fan plate 6 and drives the lock tongue 4 to be retracted.

[0032] In the first installation position and the second installation position, the lock rod 3 can be lifted or lowered, so that the fire lock can be used in a mirrored manner on the left and right sides of the door and window frame, which greatly improves the applicability of the fire lock and reduces the production cost.

[0033] Specifically, a pin 11 is provided on one side of the lock tongue 4, and a guide step 6.2 is provided on the support arm 6.1. The guide step 6.2 and the end face of the support arm 6.1 form an angle for positioning the pin 11. The pin 11 is lifted by the support arm 6.1, and the pin 11 is pressed against the guide step 6.2 of the support arm 6.1, thereby increasing the stability of the pin 11 on the support arm 6.1 and reducing the movement of the pin 11 or the first fan plate 6 during the action of the lock tongue 4.

[0034] When driving, the transmission part 5.1 of the pressure rod 5 presses down and drives the transmission pin 8 to lift up. Under the constraint of the transmission pin 8, the first fan plate 6 and the second fan plate 7 rotate around the rotation axis point on the base shell 2, so that the first fan plate 6 and the second fan plate 7 are relatively retracted. At the same time, the support arm 6.1 is synchronously lifted with the first fan plate 6, the lock tongue 4 rotates around the rotation axis and is retracted into the base shell 2, the transmission part 5.1 is released, and the lock tongue 4 returns under the action of the reset torsion spring, and the column pin 11 returns with the lock tongue 4 and presses down the support arm 6.1, so that the first fan plate 6 and the second fan plate 7 are relatively opened, realizing the mutual retraction and opening of the first fan plate 6 and the second fan plate 7, wherein the lock tongue 4 is driven by the support arm 6.1 on the first fan plate 6, and the lock rod 3 is driven to rise or fall by the first swing arm 9 or the second swing arm 10, so that the upper locking point, the lower locking point and the side locking point are driven to move at the same time with fewer parts, and the structure is simple and the force is stable.

[0035] Specifically, the holding mechanism includes a rotor 12 arranged on the base shell 2, a limit member 13 rotating synchronously with the rotor 12, and a limit plate 14 arranged on the pressure rod 5. The rotor 12 drives the limit member 13 to abut against the limit plate 14 to keep the fire lock in a normally open state. The end of the limit member 13 abuts against the end surface of the limit plate 14 at a point contact, and the rotation axis of the limit member 13 and the contact end points of the limit member 13 and the limit plate 14 are both maintained on the center line of the base shell 2.

[0036] Specifically, the limit plate 14 is arranged on the retaining portion 5.2 and extends toward the limit member 13, so that the end of the limit plate 14 is relatively close to the limit member 13 in the vertical direction, which is conducive to the limit member 13 being quickly bounced open by the limit plate 14 when switching to the normally closed state.

[0037] Specifically, the limit plate 14 is symmetrically arranged in an "L" shape about the center line of the base shell 2, and the end of the limit plate 14 is bent to provide an arc surface 14.1, so that when switching from the normally closed state to the normally open state, the small end of the limit member 13 always remains tangent to the arc surface 14.1 at the end of the limit plate 14, the limit plate 14 is stably stressed, and the fit is smoother and more stable.

[0038] Specifically, a positioning groove 14.2 is provided on the mating end surface of the limiting plate 14 and the limiting member 13, and the limiting member 13 has an arc portion, and the positioning groove 14.2 and the arc portion are stacked about the center line of the base shell 2. When the fire lock is in the normally open state, the limiting member 13 is tangent to the limiting plate 14, and the end point of the arc portion is placed in the positioning groove 14.2. The positioning groove 14.2 is provided on the limiting plate 14, and the small end portion of the limiting member 13 is placed in the positioning groove 14 in the normally open state. .2, a crisp prompt sound is provided after the normally open state is in place, and the stability of the limiter 13 is increased, so that the limiter 13 is not easily opened by a light touch, and the curvature of the positioning groove 14.2 is greater than the curvature of the small end of the limiter 13, so that the limiter 13 and the positioning groove 14.2 still maintain point contact. When the fire lock switches from the normally open state to the normally closed state, the arcs on both sides of the groove wall of the positioning groove 14.2 provide guidance for the limiter 13, which is convenient for operation without applying excessive force.

[0039] When switching from the normally closed state to the normally open state, the pressure rod 5 contacts the limit plate 14 through the limit plate 14 so that the pressure rod is pressed down by the limit member 13 to open the locking member. In the normally open state of the fireproof lock, the arc-shaped small end of the limit member 13 is pressed against the middle of the limit plate 14, and the contact point between the limit member 13 and the limit plate 14 and the center of the rotation axis of the limit member 13 are all located on the center line of the base shell 2. Most of the force from the limit plate 14 on the limit member 13 is converted into a holding force that tends to keep the limit member 13 in the current state, thereby effectively increasing the pressing effect between the limit plate 14 and the limit member 13.

[0040] When switching from the normally open state to the normally closed state, the vertically rotating limit piece 13 disengages from the positioning groove 14.2, that is, the small end of the limit piece 13 leaves the center line of the base shell 2 and forms a certain angle with the direction of the elastic force of the pressure rod. The force applied by the limit plate 14 to the limit piece 13 is converted into a force driving the limit piece 13 to rotate. The limit piece 13 is a planar component, and the arc-shaped small end portion plays a guiding role, so that the limit piece 13 can be quickly popped open, thereby reducing the jamming between the limit piece 13 and the pressure rod, making the switching action of the normally open and normally closed fire locks smoother.

[0041] Specifically, through grooves 2.1 are provided on both sides of the upper part of the base shell 2, and ears 2.2 are integrally extended on the groove wall of the through groove 2.1. The ends of the first fan plate 6 and the second fan plate 7 are rotatably arranged on the ears 2.2, and the rotating ends of the first fan plate 6 and the second fan plate 7 and the support arm 6.1 are exposed at the through groove 2.1. The through groove 2.1 and the ears 2.2 are formed by grooving and flanging, which reduces the number of assembly parts and increases the compactness of the structure. In addition, the transmission part 5.1 of the first fan plate 6, the second fan plate 7 and the support arm 6.1 can be observed, oiled and debugged through the through groove 2.1 without removing the entire base shell 2, and the operation is simple and convenient.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A push-type three-point fireproof lock, comprising a base plate (1), a base shell (2) arranged on the base plate (1), a pressure rod driving mechanism arranged between the base plate (1) and the base shell (2), and a holding mechanism for keeping the pressure rod driving mechanism in a normally open state, characterized in that: It also includes a lock rod (3) and a lock tongue (4) driven by a pressure rod driving mechanism, wherein the lock rod (3) is inserted into the base shell (2), and the lock tongue (4) is hinged at the end of the base shell (2). The pressure rod driving mechanism includes a pressure rod (5), a first fan plate (6) and a second fan plate (7) rotatably arranged on both sides of the base shell (2), the ends of the first fan plate (6) and the second fan plate (7) overlap and are hinged through a transmission pin (8), the pressure rod (5) and the bottom of the transmission pin (8) are in contact with each other, the pressure rod (5) drives the transmission pin (8) to make the first fan plate (6) and the second fan plate (7) relatively close together, the lock rod (3) rises or falls with the first fan plate (6) or the second fan plate (7) close together, and the lock tongue (4) is retracted with the first fan plate (6) and is retracted into the base shell (2).

2. A horizontal push type three-point fireproof lock according to claim 1, characterized in that: The middle part of the lock rod (3) is provided with a stop bar (3.1) which abuts against the first leaf plate (6) or the second leaf plate (7); the first leaf plate (6) is provided with a support arm (6.1) which abuts against the lock tongue (4) away from the pressure rod (5).

3. A horizontal push type three-point fireproof lock according to claim 2, characterized in that: A first swing arm (9) is provided at the bottom of the first fan plate (6), and a second swing arm (10) is provided at the bottom of the second fan plate (7). The first swing arm (9) and the second swing arm (10) are symmetrically arranged with respect to the transmission pin (8), and the blocking bar (3.1) abuts against the inner side of the first swing arm (9) or the second swing arm (10).

4. The horizontal push type three-point fireproof lock according to claim 3 is characterized by: The base shell (2) has a first mounting position and a second mounting position that are symmetrically arranged; the first swing arm (9) abuts against the baffle (3.1) in the first mounting position to drive the locking rod (3) to rise or fall; the second swing arm (10) abuts against the baffle (3.1) in the second mounting position to drive the locking rod (3) to rise or fall; the first swing arm (9) and the second swing arm (10) drive the baffle (3.1) to keep moving in the same direction in the first mounting position or the second mounting position.

5. The horizontal push type three-point fireproof lock according to claim 2 is characterized by: A column pin (11) is provided on one side of the lock tongue (4), and a guide step (6.2) is provided on the support arm (6.1). The guide step (6.2) and the end surface of the support arm (6.1) form an angle for positioning the column pin (11).

6. The horizontal push type three-point fireproof lock according to claim 1, characterized in that: The retaining mechanism comprises a rotor (12) arranged on a base shell (2), a limiting member (13) rotating synchronously with the rotor (12), and a limiting plate (14) arranged on a pressure rod (5); the rotor (12) drives the limiting member (13) to abut against the limiting plate (14) so ​​that the fire lock is kept in a normally open state; the end of the limiting member (13) abuts against the end surface of the limiting plate (14) at a point contact, and the rotation axis of the limiting member (13) and the contact end point of the limiting member (13) and the baffle are both maintained on the center line of the base shell (2).

7. A horizontal push type three-point fireproof lock according to claim 6, characterized in that: The pressure rod (5) comprises a transmission part (5.1) extending out of the base shell (2), a holding part (5.2) abutting against the holding mechanism, and a driving part (5.3) abutting against the transmission pin (8); the holding part (5.2) is arranged on one side of the hinged end of the pressure rod (5), the driving part (5.3) is arranged on the other side of the hinged end of the pressure rod (5), and the limiting plate (14) is arranged on the holding part (5.2) and extends toward the limiting member (13).

8. The horizontal push type three-point fireproof lock according to claim 6, characterized in that: The limiting plate (14) is arranged in an "L" shape symmetrically about the center line of the base shell (2), and the end of the limiting plate (14) is bent to form an arc surface (14.1).

9. The horizontal push type three-point fireproof lock according to claim 6, characterized in that: A positioning groove (14.2) is provided on the mating end surfaces of the limiting plate (14) and the limiting member (13); the limiting member (13) has an arc portion; the positioning groove (14.2) and the arc portion are stacked about the center line of the base shell (2); the limiting member (13) is tangent to the limiting plate (14) when the fire lock is in a normally open state, and the end point of the arc portion is placed in the positioning groove (14.2).

10. The horizontal push type three-point fireproof lock according to claim 1, characterized in that: Through grooves (2.1) are provided on both sides of the upper part of the base shell (2), and hanging ears (2.2) are integrally extended on the groove wall of the through groove (2.1), and the ends of the first fan plate (6) and the second fan plate (7) are rotatably arranged on the hanging ears (2.2), and the rotating ends of the first fan plate (6) and the second fan plate (7) and the support arm (6.1) are exposed at the through groove (2.1).

Images