An electromagnetic system for automatic unlocking in case of fire

Abstract

The present invention relates to the field of fire protection technology, and in particular to an electromagnetic system for automatic unlocking in case of fire, comprising a switch smoke sensor, a time delay switch module, an electromagnetic lock, and a travel switch; the electromagnetic lock is arranged at the load end of the time delay switch module, the power-on action of the time delay switch module responds to the logical operation of the switch signal in the switch smoke sensor output signal, and the power-off action of the time delay switch module responds to the logical operation of the variable signal in the travel switch output signal. The present invention constructs a fire protection electromagnetic system with a simple structure, rapid response, and high safety. The system can realize lock interlocking and door opening during the smoke triggering process, avoiding the lock re-locking during the fire and affecting rescue or self-rescue; and compared with existing locks used in fire protection, the present invention preferably utilizes the signal coordination of the switch smoke sensor and the time delay switch module, so that the electronic components in the present invention are usually in a normally closed state, which has a good energy-saving effect and is conducive to market promotion.

Description

Technical Field

[0001] The present invention relates to the technical field of fire protection, in particular to an electromagnetic system for automatic unlocking in case of fire. Background Art

[0002] As people live in increasingly high-rise buildings, fire rescue or self-rescue becomes increasingly important. Therefore, a fire-resistant safety lock is needed. Existing safety locks often have complex structures, such as the fire-activated automatic door lock with publication number CN211647686U or the fire-sensing automatic electric lock with publication number CN204983978U. Most fire-resistant safety locks cannot quickly unlock and escape in the early stages of a fire, nor can they easily and quickly open the door for rescuers. Furthermore, the internal electronic components are often always on, consuming a lot of power. Therefore, we propose an electromagnetic system for automatic fire unlocking. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, meet practical needs, and provide an electromagnetic system for automatic unlocking in case of fire to solve the problems in the above-mentioned background technology.

[0004] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is: designing an electromagnetic system for automatic unlocking in fire, including a switch smoke sensor, a delay switch module, an electromagnetic lock and a travel switch; the travel switch is arranged inside the electromagnetic lock, and the contact knob of the travel switch is connected to the lock tongue hook of the electromagnetic lock through a buffer mechanism, the electromagnetic lock is arranged at the load end of the delay switch module, the power-on action of the delay switch module responds to the logical operation of the switch signal in the switch smoke sensor output signal, and the power-off action of the delay switch module responds to the logical operation of the variable signal in the travel switch output signal. The present invention constructs an electromagnetic system composed of a switch smoke sensor, a delay switch module, an electromagnetic lock and a travel switch, which has a simple structure, rapid response and high safety, and can realize the door opening action based on the presence of smoke in the early stage of a fire. The system can realize the lock interlocking and door opening during the smoke triggering process, thereby avoiding the lock being re-locked during the fire and affecting rescue or self-rescue. Compared with the existing locks used in fire fighting, the present invention preferably utilizes the signal coordination of the switch smoke sensor and the delay switch module, so that the electronic components in the present invention are usually in a normally closed state, which has a good energy-saving effect and is conducive to market promotion.

[0005] Preferably, the electromagnetic lock is an electrically controlled lock with a lock cylinder key.

[0006] Preferably, the travel switch is a micro switch type travel switch.

[0007] Preferably, the buffer mechanism includes a secondary buffer arranged on the travel switch and a cam column arranged on the lock tongue hook; the fixed end of the secondary buffer is rotatably provided on the travel switch through a pin shaft, the lock tongue hook is rotatably connected to the electromagnetic lock base plate through the cam column, and the raised end of the cam column is in contact with the free end of the secondary buffer.

[0008] Preferably, the secondary buffer component includes a rotating root, a first buffer branch and a second buffer branch; the rotating root is in contact connection with the twist-touch contact; the first buffer branch and the second buffer branch are arranged in a forked structure at the tip of the rotating root; wherein, the buffer surface of the first buffer branch is in contact connection with the surface of the travel switch, the pressure surface of the first buffer branch is in contact connection with the buffer surface of the second buffer branch, and the pressure surface of the second buffer branch is in contact connection with the raised end of the cam column.

[0009] Preferably, the first buffer branch includes a first connecting rib, the fixed end of the first connecting rib is connected to one side of the tip of the rotating root, and the free end of the first connecting rib is connected to a first buffer ring; wherein, the first buffer ring is an elliptical structure, and one side of the short axis of the first buffer ring is in contact with the surface of the travel switch, and the other side of the short axis of the first buffer ring is in contact with the buffer surface of the second buffer branch.

[0010] Preferably, the second buffer branch includes a second connecting rib, the fixed end of the second connecting rib is connected to the other side of the tip of the rotating root, and the free end of the second connecting rib is connected to a second buffer ring; wherein, the second buffer ring is an arc structure, and the size of the second buffer ring is adapted to the size of the first buffer ring, and the arc convex surface of the second buffer ring is in contact with the raised end of the cam column.

[0011] Preferably, a gap is left between the second buffer ring and the first buffer ring.

[0012] Preferably, the cam column includes a column, one end of the column is fixedly connected to the lock tongue hook, and the other end of the column is rotatably connected to the electromagnetic lock base plate; an angular protrusion is provided on the circumference of the column, and the tip of the angular protrusion is an embedded structure with a roller, and the surface of the roller is in contact with the arc convex surface of the second buffer ring.

[0013] Preferably, the rotational trajectory of the corner protrusion tip intersects with the planar projection of the first buffer ring. The present invention includes a buffer mechanism disposed between the travel switch and the electromagnetic lock to reduce the impact of the bolt hook on the push rod (touch and twist). By utilizing the intersection of the rotational trajectory of the corner protrusion tip and the planar projection of the first buffer ring, the corner protrusion tip can press against the first buffer ring as the corner protrusion rotates with the column. This allows the first and second buffer branches to overlap on the rotation root during the buffering deformation process, thereby facilitating the rotation root triggering the touch and twist.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention constructs an electromagnetic system composed of a switch smoke sensor, a delay switch module, an electromagnetic lock and a travel switch, which has a simple structure, rapid response and high safety, and can realize the door opening action based on the presence of smoke in the early stage of a fire. The system can realize the lock interlocking and door opening during the smoke triggering process, thereby avoiding the lock being re-locked during the fire and affecting rescue or self-rescue. Compared with the existing locks used in fire fighting, the present invention preferably utilizes the signal coordination of the switch smoke sensor and the delay switch module, so that the electronic components in the present invention are usually in a normally closed state, which has a good energy-saving effect and is conducive to market promotion.

[0016] 2. The present invention arranges a buffer mechanism between the travel switch and the electromagnetic lock to reduce the impact of the lock tongue hook on the push rod (touch twist), and utilizes the intersection of the rotation trajectory of the tip of the angular protrusion and the plane projection of the first buffer ring so that when the angular protrusion rotates with the column, the tip of the angular protrusion can be squeezed into the first buffer ring, causing the first buffer branch and the second buffer branch to overlap on the rotating root during the buffering deformation process, thereby facilitating the rotating root to trigger the touch twist. 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 internal structure of the electromagnetic lock in the present invention, showing the coordination relationship between the travel switch and the lock tongue hook;

[0019] Figure 3 This is a schematic diagram of the connection structure between the travel switch and the lock tongue hook in the present invention;

[0020] Figure 4 This is a schematic diagram of the connection structure between the travel switch and the cam column in the present invention, to illustrate the matching relationship between the secondary buffer and the cam column;

[0021] Figure 5 Schematic diagram of the split structure of the cam column in the present invention;

[0022] In the figure: 1. Switch smoke sensor; 2. Delay switch module; 3. Electromagnetic lock; 301. Lock tongue hook; 4. Travel switch; 401. Touch twist; 5. Buffer mechanism; 501. Secondary buffer component; 502. Cam column; 501a. Rotation root; 501b. First buffer branch; 501c. Second buffer branch; 501b-1. First connecting rib; 501b-2. First buffer ring; 501c-1. Second connection; 501c-2. Second buffer ring; 502a. Column; 502b. Corner protrusion; 502c. Roller. DETAILED DESCRIPTION

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

[0024] An electromagnetic system for automatic unlocking in case of fire, see Figures 1 to 5 , including a switch smoke sensor 1, a delay switch module 2, an electromagnetic lock 3 and a travel switch 4; the travel switch 4 is arranged inside the electromagnetic lock 3, and the contact knob 401 of the travel switch 4 is connected to the lock tongue hook 301 of the electromagnetic lock 3 through a buffer mechanism 5 to prevent the lock tongue hook 301 from instantly bouncing up and impacting the contact knob 401 on the travel switch 4, thereby affecting its service life; the electromagnetic lock 3 is arranged at the load end of the delay switch module 2, and the power-on action of the delay switch module 2 responds to the logical operation of the switch signal in the output signal of the switch smoke sensor 1, and the power-off action of the delay switch module 2 responds to the logical operation of the variable signal in the output signal of the travel switch 4. The present invention constructs an electromagnetic system composed of a switch smoke sensor 1, a delay switch module 2, an electromagnetic lock 3 and a travel switch 4, which has a simple structure, rapid response and high safety, and can realize the door opening action based on the presence of smoke in the early stage of a fire. The system can realize the lock interlocking and door opening during the smoke triggering process, thereby avoiding the lock being re-locked during the fire and affecting rescue or self-rescue. Compared with the existing locks used in fire fighting, the present invention preferably utilizes the signal coordination of the switch smoke sensor 1 and the delay switch module 2, so that the electronic components in the present invention are usually in a normally closed state, which has a good energy-saving effect and is conducive to market promotion.

[0025] It is worth noting that the electromagnetic lock 3 is an electric-controlled lock with a lock cylinder key in the prior art. The present invention improves the internal structure of the electric-controlled lock with a lock cylinder key in the prior art, and a travel switch 4 is arranged in the pop-up direction of the lock tongue hook 301 inside it. By connecting the travel switch 4 with the signal of the delay switch module 2, the electromagnetic lock 3 can be interlocked and popped open when the delay switch module 2 responds to the switch quantity smoke sensor 1, thereby avoiding the locking of the electromagnetic lock 3; in the normally closed energy-saving process when the delay switch module 2 ends the delay, the electromagnetic lock 3 can also be opened by the lock cylinder key, which is safer and is conducive to fire rescue or self-rescue.

[0026] It's worth noting that travel switch 4 is a conventional micro-switch type travel switch, such as the commonly used LXW-11 series. Its structure primarily comprises a push rod (touch knob 401), a spring, a normally closed contact, a normally open contact, and a compression spring. The present invention includes a buffer mechanism 5 between travel switch 4 and electromagnetic lock 3 to reduce the impact of the bolt hook 301 on the push rod (touch knob 401).

[0027] One embodiment Figure 2 and Figure 3 As shown, in order to facilitate understanding of how the buffer mechanism 5 connects the contact 401 and the lock tongue hook 301, the present invention also discloses a more specific implementation method of the buffer mechanism 5. The buffer mechanism 5 includes a secondary buffer member 501 arranged on the limit switch 4 and a cam column 502 arranged on the lock tongue hook 301; the fixed end of the secondary buffer member 501 is rotatably provided on the limit switch 4 through a pin shaft, the lock tongue hook 301 is rotatably connected to the bottom plate of the electromagnetic lock 3 through the cam column 502, and the raised end of the cam column 502 is in contact with the free end of the secondary buffer member 501.

[0028] As a preferred embodiment, the secondary buffer component 501 includes a rotating root 501a, a first buffer branch 501b and a second buffer branch 501c; the rotating root 501a is in contact and connected with the touch knob 401, and the rotating root 501a is used to squeeze the touch knob 401, and the squeezing force is sufficient, which is beneficial to the response of the travel switch 4 during the pop-up process of the electromagnetic lock 3; the first buffer branch 501b and the second buffer branch 501c are arranged in a forked structure at the tip of the rotating root 501a; wherein, the buffer surface of the first buffer branch 501b is in contact and connected with the surface of the travel switch 4, the pressure surface of the first buffer branch 501b is in contact and connected with the buffer surface of the second buffer branch 501c, and the pressure surface of the second buffer branch 501c is in contact and connected with the raised end of the cam column 502.

[0029] More specifically, the first buffer branch 501b includes a first connecting rib 501b-1, the fixed end of the first connecting rib 501b-1 is connected to the tip of the rotating root 501a, and the free end of the first connecting rib 501b-1 is connected to the first buffer ring 501b-2; wherein, the first buffer ring 501b-2 is an elliptical structure, which is conducive to the reset after structural deformation, and one side of the short axis of the first buffer ring 501b-2 is in contact with the surface of the travel switch 4, and the other side of the short axis of the first buffer ring 501b-2 is in contact with the buffer surface of the second buffer branch 501c. The second buffer branch 501c includes a second connecting rib 501c-1, the fixed end of the second connecting rib 501c-1 is connected to the other side of the tip of the rotating root 501a, and the free end of the second connecting rib 501c-1 is connected to the second buffer ring 501c-2; wherein, the second buffer ring 501c-2 is an arc structure, which is beneficial to increase the contact area with the first buffer ring 501b-2 while protecting the first buffer ring 501b-2 from deformation, and the size of the second buffer ring 501c-2 is adapted to the size of the first buffer ring 501b-2, and the arc convex surface of the second buffer ring 501c-2 is in contact and connected with the raised end of the cam column 502.

[0030] It is worth noting that Figure 4 As shown, there is a gap between the second buffer ring 501c-2 and the first buffer ring 501b-2. Under the angular connection between the first connecting rib 501b-1 and the second connecting rib 501c-1, the gap is the first buffer cavity where the second buffer ring 501c-2 is squeezed by the cam column 502, based on the deformation amount of the second connecting rib 501c-1; when the arc concave surface of the second buffer ring 501c-2 is pressed against the first buffer ring 501b-2, the inner cavity of the first buffer ring 501b-2 is squeezed and deformed to form a second buffer cavity. Through this double buffering impact effect, the cam column 502 and the travel switch 4 are avoided from instantaneously impacting when the lock tongue hook 301 instantaneously responds to the electromagnetic coil in the electromagnetic lock 3, which is beneficial to protecting the contact 401 of the travel switch 4.

[0031] As another preferred embodiment of the above, Figure 5 As shown, the cam column 502 includes a column 502a, one end of which is fixedly connected to the bolt hook 301 and the other end of which is rotatably connected to the base plate of the electromagnetic lock 3. A corner protrusion 502b is provided on the circumference of the column 502a. The tip of the corner protrusion 502b is embedded with a roller 502c. The surface of the roller 502c contacts the arcuate convex surface of the second buffer ring 501c-2. The present invention further designs the roller 502c on the corner protrusion 502b of the cam column 502, thereby reducing friction when the roller 502c contacts the second buffer branch 501c, thereby protecting the second buffer branch 501c.

[0032] It is worth emphasizing that if Figure 4As shown, the rotation trajectory of the tip of the corner protrusion 502b intersects with the plane projection of the first buffer ring 501b-2, so that when the corner protrusion 502b follows the rotation of the column 502a, the tip of the corner protrusion 502b can be squeezed into the first buffer ring 501b-2, causing the first buffer branch 501b and the second buffer branch 501c to overlap on the rotating root 501a during the buffering deformation process, thereby facilitating the rotating root 501a to trigger the touch twist 401.

[0033] In addition, the circuits, electronic components and modules involved in the present invention are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to internal structures and methods.

[0034] Working principle: When the switch smoke sensor 1 is triggered by smoke in the energized state, the output switch signal is transmitted to the delay switch module 2. The power-on action of the delay switch module 2 responds to the logical operation of the switch signal in the output signal of the switch smoke sensor 1, thereby controlling the power-on of the electromagnetic lock 3. After the electromagnetic coil of the electromagnetic lock 3 is energized, it drives the lock tongue hook 301 to rotate and bounce open. During this process, the cam column 502 squeezes the secondary buffer 501, and the secondary buffer 501 squeezes the contact button 401 on the travel switch 4, causing the travel switch 4 to detect that the electromagnetic lock 3 has bounced open and output a variable signal to the delay switch module 2. The power-off action of the delay switch module 2 responds to the logical operation of the variable signal in the output signal of the travel switch 4, causing the delay switch module 2 to disconnect the power circuit of the electromagnetic lock 3, so that the electromagnetic lock 3 cannot be locked after power is off, ensuring smooth fire rescue or self-rescue.

[0035] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An electromagnetic system for automatic unlocking in case of fire, characterized in that: It includes a switch smoke sensor (1), a time delay switch module (2), an electromagnetic lock (3) and a travel switch (4); The travel switch (4) is arranged inside the electromagnetic lock (3), and the contact knob (401) of the travel switch (4) is connected to the lock tongue hook (301) of the electromagnetic lock (3) through a buffer mechanism (5). The electromagnetic lock (3) is arranged at the load end of the delay switch module (2). The power-on action of the delay switch module (2) responds to the logical operation of the switch signal in the output signal of the switch smoke sensor (1), and the power-off action of the delay switch module (2) responds to the logical operation of the variable signal in the output signal of the travel switch (4).

2. The electromagnetic system for automatic unlocking in case of fire according to claim 1, characterized in that: The electromagnetic lock (3) is an electrically controlled lock having a lock core key.

3. The electromagnetic system for automatic unlocking in case of fire according to claim 1, characterized in that: The travel switch (4) is a micro switch type travel switch.

4. The electromagnetic system for automatic unlocking in case of fire according to claim 1, characterized in that: The buffer mechanism (5) comprises a secondary buffer member (501) arranged on the travel switch (4) and a cam column (502) arranged on the lock tongue hook (301); The fixed end of the secondary buffer (501) is rotatably mounted on the travel switch (4) via a pin shaft, the lock tongue hook (301) is rotatably connected to the bottom plate of the electromagnetic lock (3) via a cam column (502), and the raised end of the cam column (502) is in contact with the free end of the secondary buffer (501).

5. The electromagnetic system for automatic unlocking in case of fire according to claim 4, characterized in that: The secondary buffer component (501) comprises a rotation root (501a), a first buffer branch (501b) and a second buffer branch (501c); The rotating root (501a) is in contact with and connected to the contact knob (401); The first buffer branch (501b) and the second buffer branch (501c) are arranged at the tip of the rotating root (501a) in a bifurcated structure; The buffer surface of the first buffer branch (501b) is in contact with the surface of the travel switch (4), the pressure surface of the first buffer branch (501b) is in contact with the buffer surface of the second buffer branch (501c), and the pressure surface of the second buffer branch (501c) is in contact with the raised end of the cam column (502).

6. The electromagnetic system for automatic unlocking in case of fire according to claim 5, characterized in that: The first buffer branch (501b) comprises a first connecting rib (501b-1), a fixed end of the first connecting rib (501b-1) being connected to one side of the tip of the rotating root (501a), and a free end of the first connecting rib (501b-1) being connected to a first buffer ring (501b-2); The first buffer ring (501b-2) has an elliptical structure, and one side of the short axis of the first buffer ring (501b-2) is in contact with the surface of the travel switch (4), while the other side of the short axis of the first buffer ring (501b-2) is in contact with the buffer surface of the second buffer branch (501c).

7. The electromagnetic system for automatic unlocking in case of fire according to claim 6, characterized in that: The second buffer branch (501c) comprises a second connecting rib (501c-1), the fixed end of the second connecting rib (501c-1) is connected to the other side of the tip of the rotating root (501a), and the free end of the second connecting rib (501c-1) is connected to a second buffer ring (501c-2); The second buffer ring (501c-2) is an arc structure, and the size of the second buffer ring (501c-2) matches the size of the first buffer ring (501b-2). The arc convex surface of the second buffer ring (501c-2) is in contact with and connected to the raised end of the cam column (502).

8. The electromagnetic system for automatic unlocking in case of fire according to claim 7, characterized in that: A gap is left between the second buffer ring (501c-2) and the first buffer ring (501b-2).

9. The electromagnetic system for automatic unlocking in case of fire according to claim 7, characterized in that: The cam column (502) comprises a column (502a), one end of the column (502a) is fixedly connected to the lock tongue hook (301), and the other end of the column (502a) is rotatably connected to the bottom plate of the electromagnetic lock (3); An angular protrusion (502b) is provided on the circumference of the column (502a); the tip of the angular protrusion (502b) is provided with a roller (502c) in an embedded structure; the surface of the roller (502c) is in contact with the arc convex surface of the second buffer ring (501c-2).

10. The electromagnetic system for automatic unlocking in case of fire according to claim 9, characterized in that: The rotation trajectory of the tip of the corner protrusion (502b) intersects with the plane projection of the first buffer ring (501b-2).

Images