A locking unit

Abstract

A lock catch unit, characterized in that: the lock catch unit includes a fixed box, a lock tongue, a slider and a motor for driving the lock tongue to extend and retract are installed in the fixed box, the lock tongue can be set in the slider in a limited forward and backward sliding manner, the rear end of the slider is convexly provided with a rack that meshes with the output gear of the motor, a spring is supported between the rear end of the lock tongue and the slider, so that the lock tongue has a tendency to always extend forward from the fixed box and lock with the lock sleeve, and an emergency pull rod is also provided in the fixed box to connect with the rear end of the lock tongue. The lock tongue is set in the slider, and the motor is connected to the slider by a gear and rack transmission mode, so that it can be in place in time after unlocking and the noise is small; an emergency pull rod is provided, and an emergency key can be used to unlock in the event of power failure or emergency. The invention has a simple and compact structure, a small size, and convenient assembly and processing. At the same time, the locking is reliable, the noise is small, and the cost is reduced. It can be widely used in scenes such as wooden drawers, steel drawers, glass doors, and safe cabinets.

Description

Technical Field

[0001] The invention relates to the technical field of locks, and in particular to a lock unit suitable for locking a safety drawer or a glass door. Background Art

[0002] With the continuous improvement of people's living standards, safes or safes have entered the lives of the general public. People can put precious jewelry, cash, important bills and documents in safes. However, traditional safes are generally single-door structures. At present, safes with upper drawers and lower doors have also appeared on the market. Such safes generally use two sets of mechanisms to realize the switch lock of drawers and cabinet doors separately. Among them, the locking mechanism of the drawer is generally a one-way design, which cooperates with the lock hook and spring at the tail of the drawer to realize the switch lock action, that is, the motor rotates to drive the structural parts to release the lock hook, and the drawer pops out under the action of the spring; after the motor returns to its position, the drawer is manually pushed to close in place, and the lock hook at the tail is inserted into the buckle, that is, automatic locking is realized. However, most of the existing lock buckles on the market are made of large motors, with complex structures, large volumes, and limited installation and use. At the same time, the transmission mostly uses worm gears, which are noisy and cannot be in place in time after unlocking. In addition, the lock tongue slider is fixed together and driven by a motor. In order to reduce the driving force of the motor, a reset spring with relatively small elasticity is used to reduce the motor load, resulting in a relatively small locking force. In addition, the motor load is large and the battery power supply is limited, so the service life will be shortened, affecting the service life.

[0003] Therefore, it is necessary to design a lock unit with reasonable and compact structure, small size, reliable locking and long service life to meet the locking needs of drawers and the like. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a locking unit with reasonable and compact structure, reliable locking, low noise and long service life.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a locking unit, characterized in that: the locking unit includes a fixed box, a lock tongue, a slider and a motor for driving the lock tongue to extend and retract are installed in the fixed box, the lock tongue can be slidably arranged in the slider with limited forward and backward movement, the rear end of the slider is convexly provided with a rack that meshes with the output gear of the motor, a spring is supported between the rear end of the lock tongue and the slider, so that the lock tongue has a tendency to always extend forward from the fixed box to lock with the lock sleeve, and an emergency pull rod is also provided in the fixed box to connect with the rear end of the lock tongue.

[0006] As an improvement, the fixed box is a rectangular shell formed by a box body and a box cover. A groove is laterally formed in the middle of the box body for the slider to be placed and slide. The slider includes a U-shaped block that matches the groove. The bottom of the U-shaped block extends backward to form an extension plate. The rack is convexly arranged on the extension plate near the right side. The motor is installed in the box body and on the right side of the groove. The output gear of the motor is located above the rack and meshes with the rack. When the motor rotates, the output gear rotates to drive the rack to move, and the slider moves forward and backward accordingly. The lock tongue is arranged in the U-shaped block and is movably connected to the slider. The front side of the box body is provided with an opening for the lock tongue to extend forward at a position corresponding to the groove, and the rear side of the box body is provided with a slot hole for the rear end of the quick pull rod to extend.

[0007] Furthermore, a strip-shaped limiting hole is provided at the bottom of the slider, a connecting ear is protruding from the bottom of the rear end of the lock tongue, and a strip-shaped hole corresponding to the limiting hole is provided at the front end of the emergency pull rod. The connecting pin is inserted into the limiting hole by passing through the strip hole and the through hole of the connecting ear to connect the lock tongue, the emergency pull rod and the slider, and can move forward and backward along the limiting hole and the strip hole.

[0008] Furthermore, a slider cover is provided at the upper end of the slider, connecting bosses are provided on the left and right sides of the slider respectively, and corresponding connecting ears are provided on the left and right sides of the slider cover, and the slider cover is fixed to the slider by screws.

[0009] Furthermore, a concave hole is provided at the rear end of the lock tongue, a spring column is formed in the concave hole, the spring is sleeved on the spring column, a block that abuts against the spring is convexly provided on the lower surface of the slider cover, one end of the spring abuts against the lock tongue, and the other end abuts against the block for support, so that the lock tongue has a tendency to always move forward.

[0010] Furthermore, the width of the rear end of the emergency pull rod extending out of the box body is greater than the width of the slot hole on the rear side of the box body. The front end of the emergency pull rod is connected to the lock tongue, and the rear end is limited by the outer wall of the box body. When the lock tongue moves forward to a locked state driven by the slider, the strip hole of the emergency pull rod coincides with the limiting hole of the slider.

[0011] Furthermore, two front and rear micro switches for limiting the movement of the slider are installed in the box body. The front and rear micro switches are respectively installed on the left side of the groove. When the slider moves backward and touches the rear micro switch, the motor stops rotating and is unlocked. When the motor reverses and drives the slider to move forward and touches the front micro switch, the motor stops rotating and is in a pre-locked state.

[0012] Finally, a battery box and a motor control board for controlling the operation of the motor are also installed in the box body. Connecting columns are provided at the four corners of the box body, and corresponding connecting countersunk holes are provided on the box cover. The box cover is matched with the box body and is fixed to the box body by screws passing through the connecting countersunk holes and screwing into the connecting columns. Mounting holes are also opened at the four corners of the box body, and corresponding mounting through holes are provided on the box cover.

[0013] Compared with the prior art, the advantages of the present invention are: the lock tongue is arranged in the slider, and there is a spring between the lock tongue and the slider, so that the lock tongue and the slider can move relative to each other and slide at the same time, and the motor is connected to the slider through the transmission mode of gear and rack, so that it can be in place in time after unlocking and the noise is small; the volume is small and the installation is convenient; at the same time, the direct influence of the spring on the motor load is reduced, and the motor can use a relatively small power motor, which is energy-saving and can extend the battery life; an emergency pull rod is provided, and an emergency key can be used to unlock in the event of power failure or emergency. The present invention has a simple and compact structure, a small volume, a beautiful appearance, and convenient assembly and processing. At the same time, the locking is reliable, the noise is small, and the cost is reduced. It can be widely used in scenes such as wooden drawers, steel drawers, glass doors, and safe cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a structural appearance diagram of an embodiment of the present invention;

[0015] Figure 2 is a schematic diagram of the internal structure of an embodiment of the present invention when the box cover is opened;

[0016] Figure 3 yes Figure 2 Schematic diagram of the back structure;

[0017] Figure 4 is an exploded view of an embodiment of the present invention;

[0018] Figure 5 It is a schematic diagram of an installation of an embodiment of the present invention installed on a drawer. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings.

[0020] like Figures 1 to 5 As shown, a locking unit includes a fixed box A, in which a lock tongue 3, a slider 4 and a motor 5 for driving the lock tongue 3 to extend and retract are installed. The lock tongue 3 can be slidably arranged in the slider 4 with limited forward and backward movement. A rack 43 is convexly provided at the rear end of the slider 4 to mesh with an output gear 50 of the motor 5. A spring 7 is supported between the rear end of the lock tongue 3 and the slider 4, so that the lock tongue 3 has a tendency to always extend forward from the fixed box A to lock with the lock sleeve 30. An emergency pull rod 6 is also provided in the fixed box A to connect with the rear end of the lock tongue 3.

[0021] The specific structure is: Figure 4 The fixed box A is a rectangular shell formed by the box body 1 and the box cover 2. A groove 11 is formed laterally in the middle of the box body 1 for the slider 4 to be placed and slide. The slider 4 includes a U-shaped block 41 that matches the groove 11. The bottom of the U-shaped block 41 extends backward to form an extension plate 42. The rack 43 is convexly arranged on the extension plate 42 near the right side. The motor 5 is installed in the box body 1 and is located on the right side of the groove 11. The output gear 50 of the motor 5 is located above the rack 43 and meshes with the rack 43. When the motor 5 rotates, the output gear 50 rotates to drive the rack 43 to move, and the slider 4 also moves forward and backward accordingly. The lock tongue 3 is arranged in the U-shaped block 41 and is limitedly movable and connected to the slider 4. The front side of the box body 1 is provided with an opening 15 for the lock tongue 3 to extend forward corresponding to the position of the groove 11. The rear side of the box body 1 is provided with a slot 14 for the rear end of the quick pull rod 6 to extend. A strip-shaped limiting hole 44 is provided at the bottom of the slider 4, a connecting ear 31 is provided at the bottom of the rear end of the lock tongue 3, a strip-shaped hole 61 corresponding to the limiting hole 44 is provided at the front end of the emergency pull rod 6, and the locking tongue 3 is connected with the emergency pull rod 6 and the slider 4 by passing the connecting pin 10 through the strip-shaped hole 61 and the through hole of the connecting ear 31 and inserting into the limiting hole 44, and the locking tongue 3 is connected with the emergency pull rod 6 and the slider 4, and can move forward and backward along the limiting hole 44 and the strip-shaped hole 61. A slider cover 40 is also provided at the upper end of the slider 4, and connecting bosses 45 are provided on the left and right sides of the slider 4, and corresponding connecting ears 401 are provided on the left and right sides of the slider cover 40, and the slider cover 40 is fixed to the slider 4 by screws. The rear end of the lock tongue 3 is provided with a concave hole, in which a spring column 32 is formed, and the spring 7 is sleeved on the spring column 32. The lower surface of the slider cover 40 is convexly provided with a stopper 402 that abuts against the spring 7. One end of the spring 7 abuts against the inner wall of the concave hole of the lock tongue 3, and the other end abuts against the stopper 402 for support, so that the lock tongue 3 has a tendency to always move forward. The width of the part of the rear end of the emergency pull rod 6 extending out of the box body 1 is greater than the width of the slot hole on the rear side of the box body 1. The front end of the emergency pull rod 6 is connected to the lock tongue 3, and the rear end abuts against the outer wall of the box body 1 for limiting. When the lock tongue 3 moves forward to the locked state driven by the slider 4, the bar hole 61 of the emergency pull rod 6 coincides with the limiting hole 44 of the slider 4. Two rear micro switches 8 and a front micro switch 9 for limiting the movement of the slider 4 are also installed in the box body 1. The rear micro switch 8 and the front micro switch 9 are respectively installed on the left side of the groove 11. When the slider 4 moves backward and the connecting boss 45 touches the rear micro switch 8, the motor 5 stops rotating and is unlocked. When the motor 5 reverses and drives the slider 4 to move forward, when the connecting boss 45 touches the front micro switch 9, the motor 5 stops rotating and is in a pre-locked state.

[0022] A battery box and a motor control board for controlling the operation of the motor 5 are also installed in the box body 1. Connecting columns 13 are provided at the four corners of the box body 1, and corresponding connecting countersunk holes 22 are provided on the box cover 2. The box cover 2 is matched with the box body 1, and is fixed to the box body 1 by screws passing through the connecting countersunk holes 22 and screwing into the connecting columns 13. Mounting holes 12 are also opened at the four corners of the box body 1, and corresponding mounting through holes 21 are provided on the box cover 2. The fixing box A is installed in the corresponding position by screws.

[0023] The lock unit of this embodiment can be applied to scenes such as wooden drawers, steel drawers, and glass doors. This embodiment is installed on the drawer 100, such as Figure 5 As shown, the fixing box A is installed at the rear side of the drawer 100, the locking tongue 3 faces downward, and the lock sleeve 30 is installed on the fixing frame below the drawer 100 and corresponds to the locking tongue 3, see Figure 5 .

[0024] Here’s how it works:

[0025] During conventional unlocking, when the system is powered on, use fingerprint operation on the operation panel. After the fingerprint verification is correct, the motor 5 rotates, driving the output gear 50 to rotate, driving the slider 4 to move through the rack 43, and the connecting protrusion 45 hits the rear micro switch 8, the motor 5 stops rotating, and the unlocking is successful. After 2 seconds, the motor 5 reverses, driving the slider 4 to move in the opposite direction through the rack 43, and the connecting protrusion 45 hits the front micro switch 9 and stops. At this time, it is in the pre-locking state, that is, the lock tongue 3 will retract under pressure, and then extend under the action of the internal spring 7 to achieve the purpose of locking.

[0026] When the system is out of power and opened in an emergency, in the locked state, the emergency pull rod 6 is pulled to drive the lock tongue 3 to move backward. At this time, the slider 4 does not move. After the emergency pull rod 6 is reset, the lock tongue 3 returns to the pre-locked state under the action of the spring.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A locking unit, characterized in that: The lock catch unit includes a fixed box, in which a lock tongue, a slider and a motor for driving the lock tongue to extend and retract are installed. The lock tongue can be slidably arranged in the slider in a forward and backward limited manner. A rack is convexly provided at the rear end of the slider to mesh with the output gear of the motor. A spring is supported between the rear end of the lock tongue and the slider so that the lock tongue has a tendency to always extend forward to the fixed box and lock with the lock sleeve. An emergency pull rod is also provided in the fixed box to connect with the rear end of the lock tongue. The fixed box is a shell formed by a box body and a box cover, a groove for the slider to be placed and slide is formed transversely in the middle of the box body, the slider includes a U-shaped block matched with the groove, the bottom of the U-shaped block extends backward to form an extension plate, the rack is convexly arranged on the extension plate near the right side, the motor is installed in the box body and on the right side of the groove, the output gear of the motor is located above the rack and meshes with the rack, when the motor rotates, the output gear rotates to drive the rack to move, and the slider moves forward and backward accordingly, the lock tongue is arranged in the U-shaped block and is movably connected with the slider, the front side of the box body is provided with an opening for the lock tongue to extend forward at a position corresponding to the groove, and the rear side of the box body is provided with a slot hole for the rear end of the quick pull rod to extend; A strip-shaped limiting hole is provided at the bottom of the slider, a connecting ear is protruding from the bottom of the rear end of the lock tongue, and a strip-shaped hole corresponding to the limiting hole is provided at the front end of the emergency pull rod. The connecting pin is inserted into the limiting hole through the strip hole and the through hole of the connecting ear to connect the lock tongue, the emergency pull rod and the slider together, and can move forward and backward along the limiting hole and the strip hole.

2. The locking unit according to claim 1, characterized in that: A slider cover is also provided at the upper end of the slider, and connecting bosses are respectively provided on the left and right sides of the slider, and corresponding connecting ears are provided on the left and right sides of the slider cover, and the slider cover is fixed to the slider by screws.

3. The locking unit according to claim 2, characterized in that: A concave hole is provided at the rear end of the lock tongue, a spring column is formed in the concave hole, the spring is sleeved on the spring column, a stopper that abuts against the spring is convexly provided on the lower surface of the slider cover, one end of the spring abuts against the lock tongue, and the other end abuts against the stopper for support, so that the lock tongue has a tendency to always move forward.

4. The locking unit according to claim 3, characterized in that: The width of the rear end of the emergency pull rod extending out of the box body is greater than the width of the slot hole on the rear side of the box body. The front end of the emergency pull rod is connected to the lock tongue, and the rear end is limited by the outer wall of the box body. When the lock tongue moves forward to a locked state driven by the slider, the strip hole of the emergency pull rod coincides with the limiting hole of the slider.

5. The locking unit according to any one of claims 1 to 4, characterized in that: The box body is also equipped with two front and rear micro switches for limiting the movement of the slider. The front and rear micro switches are respectively installed on the left side of the groove. When the slider moves backward and touches the rear micro switch, the motor stops rotating and is unlocked. When the motor reverses and drives the slider to move forward and touches the front micro switch, the motor stops rotating and is in a pre-locked state.

6. The locking unit according to claim 5, characterized in that: A battery box and a motor control board for controlling the operation of the motor are also installed in the box body. Connecting columns are provided at the four corners of the box body, and the box cover is provided with corresponding connecting countersunk holes. The box cover is matched with the box body and is fixed to the box body by screws passing through the connecting countersunk holes and screwing into the connecting columns. Mounting holes are also opened at the four corners of the box body, and the box cover is provided with corresponding mounting through holes.

Images