Electric locking device

Abstract

The utility model discloses an electric locking device, and relates to the technical field of locking devices. Comprising a motor, a transmission shaft connected with an output shaft of the motor and provided with a screw, a sliding block in threaded connection with the transmission shaft, an opening shifting fork installed on the sliding block, a transmission box arranged outside the sliding block, a first limiting switch and a second limiting switch, wherein the first limiting switch and the second limiting switch are installed at the two ends of the transmission box respectively. The second limiting switch is closer to the end of the motor than the first limiting switch, shifting pieces of the first limiting switch and the second limiting switch are both located on the inner side, and the outer side of the first limiting switch and the outer side of the second limiting switch are connected with a first diode and a second diode respectively. The first pole of the motor is connected with the positive pole of the second diode, the negative pole of the first diode is connected with the negative pole of the second diode, and the positive pole of the first diode is connected with the second pole of the motor. The electric locking device does not need a circuit board, realizes electric control, and is simple in structure and stable in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to an electric lock. Background Art

[0002] The transmission locker is a rod-shaped transmission device with locking points that controls the locking and opening of doors and windows. It cooperates with the transmission rod to realize the function of locking windows, and can realize the locking function of casement doors and windows and suspended windows. The locker is divided into multi-point locker and single-point locker. The multi-point locker realizes the multi-point locking function for sliding doors and windows. The single-point locker can realize the locking of sliding doors and windows at a single position through operation.

[0003] However, most of the existing locks are manually operated and manually controlled, which is inconvenient to control; the motor control start and stop of some electric window openers also require manual control switches, which makes it easy for the window to not be closed tightly; the connecting wires of the motor leak out and move with the opening fork of the lock, and the wires are exposed and messy, and the wires are easily entangled and pulled apart, affecting the normal use of the lock.

[0004] In summary, how to effectively solve the problem of the inconvenience of using the existing manual control of the lock is an urgent problem that technicians in this field need to solve. Utility Model Content

[0005] The utility model aims to provide an electric lock which does not require a circuit board, realizes electric control, has a simple structure and stable operation.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] An electric lock comprises a motor, a transmission shaft connected to an output shaft of the motor and having a screw, a slider threadedly connected to the transmission shaft, an open shift fork mounted on the slider, a transmission box arranged outside the slider, a first limit switch and a second limit switch respectively mounted at both ends of the transmission box, the second limit switch being closer to an end of the motor than the first limit switch, the paddles of the first limit switch and the second limit switch being both located inside, the outer sides of the first limit switch and the second limit switch being respectively connected to a first diode and a second diode, the first pole of the motor being connected to the positive pole of the second diode, the negative pole of the first diode being connected to the negative pole of the second diode, and the positive pole of the first diode being connected to the second pole of the motor.

[0008] Preferably, it also includes a shell arranged outside the motor, transmission box, limit switch and wires.

[0009] Preferably, it further comprises end covers connected to both ends of the shell, and the end covers are provided with threaded holes connected to the windows.

[0010] Preferably, the transmission box and the housing are connected via a second screw.

[0011] Preferably, it also includes a coupling, the end face of the coupling is provided with a through hole for the output shaft of the motor to pass through, a pair of opposite side faces of the coupling are provided with T-shaped grooves, the transmission box includes a first transmission cover and a second transmission cover that are interlocked, and the ends of the first transmission cover and the second transmission cover are provided with T-shaped bosses that match the T-shaped grooves.

[0012] Preferably, the T-shaped groove and the T-shaped boss are clearance-fitted.

[0013] Preferably, the surface of the transmission cover where the T-shaped boss is located is perpendicular to the surface of the transmission box where the limit switch is located.

[0014] Preferably, the first limit switch and the second limit switch are installed on the same surface of the transmission box, and the opening and closing direction of the paddle is the same as the length direction of the limit switch.

[0015] Preferably, the two diodes have the same direction, the directions of the first diode and the second diode are perpendicular to the axis of the transmission shaft, and the directions of the first diode and the second diode are parallel to the length directions of the first limit switch and the second limit switch.

[0016] Preferably, the slider and the opening fork are detachably connected.

[0017] The beneficial effect of the utility model is that the electric lock includes a motor, a transmission shaft, a slider, an opening fork, a transmission box, a first limit switch, a second limit switch, a first diode and a second diode. The motor provides power, and the transmission shaft is connected to the output shaft of the motor, and can be specifically connected through a coupling. The output shaft of the motor rotates to drive the transmission shaft to rotate. The transmission shaft also has a screw, which is equivalent to a screw rod. The slider has an internal threaded hole, and the internal threaded hole of the slider is threadedly connected to the transmission shaft. The rotation of the transmission shaft drives the slider to rotate and move along the transmission shaft.

[0018] The opening fork is mounted on the slider, and the opening fork moves synchronously with the slider. The opening fork is a transmission member, and can be used in conjunction with the transmission rod to achieve the function of locking the window. The transmission box is arranged outside the slider, and the transmission box protects the slider and the transmission shaft. The transmission box has an opening, and the opening fork is exposed from the opening. The first limit switch and the second limit switch are respectively mounted at both ends of the transmission box, the second limit switch is located at the end close to the motor, and the first limit switch is located at the end away from the motor.

[0019] The first limit switch and the second limit switch are both equipped with a paddle, which is located on the inner side of the limit switch, that is, between the two limit switches, and the two paddles are opposite to each other. The first limit switch and the second limit switch are connected to the first diode and the second diode respectively, and the first diode and the second diode are respectively located on the outer side of the first limit switch and the second limit switch, that is, on the side away from the paddle. The specific diode is connected in parallel with the limit switch. The parallel diode has multiple functions in the electronic circuit, including protecting the circuit from reverse voltage, limiting the current size, realizing selective conduction of the circuit, realizing voltage compensation, realizing reverse protection of the circuit, and realizing rectification of the circuit. By reasonably applying parallel diodes, the performance and reliability of the circuit can be improved.

[0020] The first pole of the motor is connected to the positive pole of the second diode, the negative pole of the first diode is connected to the negative pole of the second diode, and the positive pole of the first diode is connected to the second pole of the motor. The reciprocating motion of the slider is controlled by the forward and reverse rotation of the DC motor. Specifically, when the motor rotates forward, the slider moves in one direction. When it reaches the limit, it touches the paddle of the limit switch, and the circuit is cut off by the limit switch. At this time, the circuit is disconnected and the motor stops to avoid damage. The motor reverses, that is, the positive and negative power supplies of the motor are swapped. At this time, the circuit is cut off and the motor will not rotate. Adding a diode in parallel to the limit switch, the limit switch only cuts off the current in one direction. When the slider needs to go back, swap the polarity of the power supply and change the direction of the current. At this time, the circuit is connected by the diode. The limit switches on both sides have parallel diodes. The unidirectional conductivity of the diode is used in parallel with the limit switch to achieve that the limit switch only cuts off the current in one direction, rather than simply cutting off the entire circuit.

[0021] The electric lock provided by the utility model adopts a limit switch and a diode to control the stroke, does not need a circuit board, has a simple structure, realizes automatic control of electric locking of the window, saves manual control, and is more convenient and accurate in control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of an electric lock provided by a specific implementation method of the utility model;

[0024] Figure 2 It is the internal schematic diagram of the electric lock;

[0025] Figure 3 is an exploded schematic diagram of an electric lock;

[0026] Figure 4 This is a schematic diagram of the electrical control of the electric lock.

[0027] The following are marked in the accompanying drawings:

[0028] 1-end cover, 2-first screw, 3-open fork, 4-first transmission cover, 5-second transmission cover, 6-second screw, 7-housing, 8-coupling, 9-slider, 10-third screw, 11-transmission shaft, 12-motor, 13-second limit switch, 14-paddle, 15-second diode, 51-T-type boss, 81-T-type groove. DETAILED DESCRIPTION

[0029] The core of the utility model is to provide an electric lock, which does not require a circuit board, realizes electric control, has a simple structure and stable operation.

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the structure of an electric lock provided by a specific implementation method of the utility model; Figure 2 It is the internal schematic diagram of the electric lock; Figure 3 is an exploded schematic diagram of an electric lock; Figure 4 This is a schematic diagram of the electrical control of the electric lock.

[0032] In a specific embodiment, the electric lock provided by the utility model includes a motor 12, a transmission shaft 11 connected to the output shaft of the motor 12 and having a screw, a slider 9 threadedly connected to the transmission shaft 11, an open fork 3 installed on the slider 9, a transmission box arranged outside the slider 9, and a first limit switch and a second limit switch 13 respectively installed at both ends of the transmission box, the second limit switch 13 is closer to the end of the motor 12 than the first limit switch, and the paddles 14 of the first limit switch and the second limit switch 13 are both located on the inside, and the outer sides of the first limit switch and the second limit switch 13 are respectively connected to the first diode and the second diode 15, and the two diodes have the same direction, the first pole of the motor 12 is connected to the positive pole of the second diode 15, the negative pole of the first diode is connected to the negative pole of the second diode 15, and the positive pole of the first diode is connected to the second pole of the motor 12.

[0033] In the above structure, the electric lock includes a motor 12 , a transmission shaft 11 , a slider 9 , an opening fork 3 , a transmission box, a first limit switch, a second limit switch 13 , a first diode and a second diode 15 .

[0034] The motor 12 provides power, and the transmission shaft 11 is connected to the output shaft of the motor 12, and can be connected through a coupling. The output shaft of the motor 12 rotates to drive the transmission shaft 11 to rotate.

[0035] The transmission shaft 11 has a screw, which is equivalent to a screw rod. The slider 9 has an internal threaded hole, and the internal threaded hole of the slider 9 is threadedly connected with the transmission shaft 11. The rotation of the transmission shaft 11 drives the slider 9 to rotate and move along the transmission shaft 11.

[0036] The opening fork 3 is mounted on the slider 9, and the opening fork 3 moves synchronously with the slider 9. The opening fork 3 is a transmission member, which can be used in conjunction with the transmission rod to achieve the function of locking the window. The transmission box is arranged outside the slider 9, and the transmission box protects the slider 9 and the transmission shaft 11. The transmission box has an opening, and the opening fork 3 is exposed from the opening. The first limit switch and the second limit switch 13 are respectively mounted on both ends of the transmission box, the second limit switch 13 is located at the end close to the motor 12, and the first limit switch is located at the end away from the motor 12.

[0037] The first limit switch and the second limit switch 13 are both provided with a paddle 14, which is located on the inner side of the limit switch, that is, between the two limit switches, and the two paddles 14 are opposite to each other. The first limit switch and the second limit switch 13 are respectively connected to the first diode and the second diode 15, which are respectively located on the outer side of the first limit switch and the second limit switch 13, that is, on the side away from the paddle 14. The specific diode is connected in parallel with the limit switch, and the parallel diode has multiple functions in the electronic circuit, including protecting the circuit from reverse voltage, limiting the current size, realizing selective conduction of the circuit, realizing voltage compensation, realizing reverse protection of the circuit, and realizing rectification of the circuit. By reasonably applying parallel diodes, the performance and reliability of the circuit can be improved.

[0038] The first pole of the motor 12 is connected to the positive pole of the second diode 15, the negative pole of the first diode is connected to the negative pole of the second diode 15, and the positive pole of the first diode is connected to the second pole of the motor 12. Preferably, the first diode and the second diode 15 are switching diodes, and the function of the diode is to prevent the malfunction of the device caused by a short circuit of the line. The switching diode is a type of semiconductor diode, which is a type of diode specially designed and manufactured for "opening" and "closing" in the circuit.

[0039] It should be noted that the reciprocating motion of the slider 9 is controlled by the forward and reverse rotation of the DC motor 12. Specifically, the motor 12 rotates forward, and the slider 9 moves in one direction. After reaching the limit, it touches the paddle 14 of the limit switch, and the circuit is cut off by the limit switch. At this time, the circuit is disconnected, and the motor 12 stops to avoid damage. The motor 12 reverses, that is, the positive and negative power supplies of the motor 12 are swapped. At this time, the circuit is cut off, and the motor 12 will not rotate. Adding a diode in parallel to the limit switch, the limit switch only cuts off the current in one direction. When the slider 9 needs to go back, the power supply polarity is swapped to change the current direction. At this time, the circuit is connected by the diode. The limit switches on both sides have parallel diodes. The unidirectional conductivity of the diode is used in parallel with the limit switch to achieve that the limit switch only cuts off the current in one direction, rather than simply cutting off the entire circuit.

[0040] For example, when the slider 9 hits the paddle 14 of the second limit switch 13 during movement, the power supply is cut off by the second limit switch 13 and the slider 9 stops moving; if reverse power is given, the current can pass through the second diode 15 and the slider 9 moves in the other direction, thereby achieving travel limit.

[0041] The electric lock provided by the utility model adopts a limit switch and a diode to control the stroke, does not need a circuit board, has a simple structure, realizes automatic control of electric locking of the window, saves manual control, and is more convenient and accurate in control.

[0042] The above-mentioned electric lock is only a preferred solution and is not limited to this. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation methods, which also include a shell 7 arranged on the outside of the motor 12, the transmission box, the limit switch and the wires.

[0043] In a specific embodiment, a shell 7 is provided on the outside of the motor 12, the transmission box, the limit switch and the wires. In other words, the shell 7 is wrapped around the outside of the motor 12, the transmission box, the limit switch and the wires to protect the components and prevent them from being damaged. The wires are built into the shell 7 to prevent the wires from being exposed and getting entangled, twisted or broken as they move with the opening fork 3.

[0044] In a preferred embodiment, a sealing ring is provided between the outer shell 7 and the internal components. The internal cavity of the outer shell 7 is a sealed waterproof cavity. Liquid cannot enter the outer shell 7, thereby preventing the motor 12, transmission box, limit switch, wires and other components from being corroded by liquid or the motor 12 from being burned by a short circuit.

[0045] On the basis of the above-mentioned specific embodiments, it further comprises end covers 1 connected to both ends of the outer shell 7, and the end covers 1 are provided with threaded holes connected to the windows.

[0046] In a specific embodiment, the end cap 1 is connected to the end of the housing 7, and preferably, the end cap 1 and the housing 7 are fixed by a first screw 2. One end of each end of the housing 7 is connected to an end cap 1, and the two ends of the lock are fixed to the window through the end cap 1.

[0047] The end cover 1 is provided with a connection plate, the bottom surface of which is flush with the bottom surface of the outer shell 7, and the bottom surface of the connection plate and the bottom surface of the outer shell 7 are in close contact with the window, so the connection is stable and firm.

[0048] The end cover 1 is provided with a threaded hole connected to the window. The screw is connected to the threaded hole of the end cover 1 and is further screwed to be connected to the window, so that the lock is installed on the window. The connection is detachable and convenient.

[0049] On the basis of the above-mentioned specific embodiments, the transmission box and the housing 7 are connected by a second screw 6 .

[0050] In a specific embodiment, the transmission box overlaps with the outer shell 7 at the connection with the outer shell 7, and threaded holes are provided at the corresponding overlapping positions. The second screw 6 is connected to the threaded holes of the two. The transmission box and the outer shell 7 are fixed by the second screw 6, and the connection is detachable and convenient.

[0051] In another more reliable embodiment, based on any of the above embodiments, it further includes a coupling 8, the end face of the coupling 8 is provided with a through hole for the output shaft of the motor 12 to pass through, a pair of opposite side surfaces of the coupling 8 are provided with T-shaped grooves 81, the transmission box includes a first transmission cover 4 and a second transmission cover 5 that are interlocked, and the ends of the first transmission cover 4 and the second transmission cover 5 are provided with T-shaped bosses 51 that match the T-shaped grooves 81.

[0052] In a specific embodiment, the coupling 8 has a through hole at the end surface close to the motor 12, the middle part and the other end of the coupling 8 are hollowed out, and the output shaft of the motor 12 passes through the through hole into the hollow middle part and extends out from the other end.

[0053] A pair of opposite sides of the coupling 8 are each provided with a T-groove 81, and the two T-grooves 81 are opposite to each other. The transmission box includes a first transmission cover 4 and a second transmission cover 5, the middle surfaces of which are aligned and fitted, and the two are buckled together. The first transmission cover 4 and the second transmission cover 5 are provided with a T-shaped boss 51 at the end close to the coupling 8, and the T-shaped boss 51 cooperates with the T-groove 81. When connected, the T-shaped boss 51 of the first transmission cover 4 and the second transmission cover 5 are respectively inserted into the two T-grooves 81 of the coupling 8, and the first transmission cover 4 and the second transmission cover 5 are connected through the coupling 8. The transmission box assembly adopts a split slot structure, which does not require screw fixing and is convenient for assembly.

[0054] In a preferred embodiment, the T-shaped groove 81 and the T-shaped boss 51 are only a preferred implementation method, not the only one. The shapes of the groove and the boss are not limited and can be rectangular, triangular, circular, etc., as long as the two shapes are consistent and can be snapped together.

[0055] On the basis of the above-mentioned specific embodiments, the T-shaped groove 81 and the T-shaped boss 51 are clearance-fitted.

[0056] In a specific embodiment, the T-shaped groove 81 and the T-shaped boss 51 have the same shape, the T-shaped groove 81 is slightly larger than the T-shaped boss 51, and the clearance is matched, for example, the clearance is 0.1mm-2mm, which not only facilitates the T-shaped boss 51 to be assembled in the T-shaped groove 81, but also allows the T-shaped boss 51 to move freely in the T-shaped groove 81; and the cross-sections of the T-shaped boss 51 and the T-shaped groove 81 are trapezoidal, the front end cross-section is smaller than the rear end cross-section, and the T-shaped boss 51 can move axially in the T-shaped groove 81. In short, the T-shaped boss 51 and the T-shaped groove 81 are floatingly connected. Compared with the screw fixing method, the floating method can adjust the axis position by floating when the lock is in use, realize the axis self-alignment, and ensure the stable operation of the lock.

[0057] On the basis of the above-mentioned specific embodiments, the surface of the transmission cover where the T-shaped boss 51 is located is perpendicular to the surface of the transmission box where the limit switch is located.

[0058] In a specific embodiment, the surface of the transmission cover where the T-shaped boss 51 is located is different from the surface of the transmission box where the limit switch is located. For example, the surface of the transmission cover where the T-shaped boss 51 is located is parallel to the surface of the open fork 3, and the surface of the transmission box where the limit switch is located is perpendicular to the surface of the open fork 3. The T-shaped boss 51 and the limit switch are installed in staggered surfaces and do not interfere with each other. The two can be connected and disassembled separately, and the installation order is not limited; the installation errors are not accumulated, that is, the installation error of one does not affect the installation error of the other.

[0059] In another more reliable embodiment, based on any of the above embodiments, the first limit switch and the second limit switch 13 are installed on the same surface of the transmission box, and the opening and closing direction of the paddle 14 is the same as the length direction of the limit switch.

[0060] In a specific embodiment, the first limit switch and the second limit switch 13 are installed on the plane where the open fork 3 is located on the transmission box. The limit switch and the open fork 3 are on a straight line. The open fork 3 can touch the paddle 14 of the limit switch by linear motion. The movement form is single and the structure is simple.

[0061] Preferably, the opening and closing direction of the paddle 14 is the same as the length direction of the limit switch, the paddle 14 is relatively long, and has a compact structure, thus saving space.

[0062] Based on the above specific embodiments, the two diodes have the same direction, the direction of the first diode and the second diode 15 is perpendicular to the axis of the transmission shaft 11 , and the direction of the first diode and the second diode 15 is parallel to the length direction of the first limit switch and the second limit switch 13 .

[0063] In a specific embodiment, the two diodes have the same direction, with the positive poles facing upward or downward at the same time. The direction of the first diode and the second diode 15 is perpendicular to the axis of the transmission shaft 11, which is convenient for installation and compact in structure. The direction of the first diode and the second diode 15 is parallel to the length direction of the first limit switch and the second limit switch 13, and the layout is reasonable and regular, making it easy to check the circuit.

[0064] In another more reliable embodiment, based on any one of the above embodiments, the slider 9 and the open fork 3 are detachably connected.

[0065] In a specific embodiment, the slider 9 and the open fork 3 are detachably connected, and different transmission rods can be adapted by replacing different open forks 3 to adapt to different application scenarios.

[0066] Preferably, the slider 9 and the open fork 3 have threaded holes, and the third screw 10 is connected to the threaded holes of the slider 9 and the open fork 3 to achieve a detachable connection between the slider 9 and the open fork 3.

[0067] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0068] The electric lock provided by the utility model is introduced in detail above. The principle and implementation method of the utility model are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed in this article.

Claims

1. An electric lock, characterized in that: The invention comprises a motor (12), a transmission shaft (11) connected to an output shaft of the motor (12) and having a screw, a slider (9) threadedly connected to the transmission shaft (11), an open shift fork (3) mounted on the slider (9), a transmission box arranged outside the slider (9), a first limit switch and a second limit switch (13) respectively mounted at two ends of the transmission box, the second limit switch (13) being closer to the end of the motor (12) than the first limit switch, the paddles (14) of the first limit switch and the second limit switch (13) being both located inside, the outsides of the first limit switch and the second limit switch (13) being respectively connected to a first diode and a second diode (15), the first pole of the motor (12) being connected to the positive pole of the second diode (15), the negative pole of the first diode being connected to the negative pole of the second diode (15), and the positive pole of the first diode being connected to the second pole of the motor (12).

2. The electric lock according to claim 1, characterized in that: It also includes a housing (7) arranged outside the motor (12), the transmission box, the limit switch and the electric wires.

3. The electric lock according to claim 2, characterized in that: It also comprises end covers (1) connected to both ends of the outer shell (7), and the end covers (1) are provided with threaded holes connected to the windows.

4. The electric lock according to claim 3, characterized in that: The transmission box and the housing (7) are connected via a second screw (6).

5. The electric lock according to claim 1, characterized in that: The invention also comprises a coupling (8), the end surface of the coupling (8) being provided with a through hole for the output shaft of the motor (12) to pass through, a pair of opposite side surfaces of the coupling (8) being provided with T-shaped grooves (81), the transmission box comprising a first transmission cover (4) and a second transmission cover (5) which are engaged with each other, and ends of the first transmission cover (4) and the second transmission cover (5) being provided with T-shaped bosses (51) which match with the T-shaped grooves (81).

6. The electric lock according to claim 5, characterized in that: The T-shaped groove (81) and the T-shaped boss (51) are clearance-fitted.

7. The electric lock according to claim 6, characterized in that: The surface of the transmission cover where the T-shaped boss (51) is located is perpendicular to the surface of the transmission box where the limit switch is located.

8. The electric lock according to claim 1, characterized in that: The first limit switch and the second limit switch (13) are mounted on the same surface of the transmission box, and the opening and closing direction of the paddle (14) is the same as the length direction of the limit switch.

9. The electric lock according to claim 8, characterized in that: The two diodes have the same direction, the direction of the first diode and the second diode (15) is perpendicular to the axis of the transmission shaft (11), and the direction of the first diode and the second diode (15) is parallel to the length direction of the first limit switch and the second limit switch (13).

10. The electric lock according to any one of claims 1 to 9, characterized in that: The sliding block (9) and the opening fork (3) are detachably connected.

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