Worm gear transmission drawer lock

Abstract

The utility model discloses a worm gear transmission drawer lock which comprises a fixing seat arranged in a lock body, a sliding groove is formed in the fixing seat, a spring bolt is installed in the sliding groove, and a lock opening corresponding to the sliding groove is formed in the side wall of the lock body. The lock tongue is further provided with a driving hole, a roller capable of rotating is arranged in the driving hole, the roller is arranged on a fixing rod of a gear in a sleeving mode, the gear is meshed with a worm, and the worm is driven by a motor to rotate so that the lock tongue can be driven by the roller to move linearly to penetrate out of the lock opening or retract into the sliding groove. A worm gear transmission mode is adopted, so that the size of the lock body is greatly reduced, transmission is stable, noise is low, the transmission ratio is large, the bearing capacity is high, meanwhile, load rotation can be prevented, the self-locking function is achieved, and the anti-theft function is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to drawer lock technical field especially relates to a worm gear drive drawer lock. BACKGROUND

[0002] At present, the conventional drawer lock, especially the cabinet drawer lock, mostly adopts the way of multi-stage gear transmission cooperation or gear and straight rack transmission cooperation, although the straight line back and forth movement of the lock tongue can be realized, but the volume of the lock body is large, and the transmission stability is poor, and there is no self-locking function, which affects the user experience. INVENTION CONTENTS

[0003] The utility model discloses a worm gear drive drawer lock, which adopts worm gear transmission, greatly reduces the volume of the lock body, is stable in transmission, low in noise, high in transmission ratio and bearing capacity, can prevent load rotation, has self-locking function and plays a role in anti-theft.

[0004] The utility model discloses the following technical scheme to realize the purpose:

[0005] A worm gear drive drawer lock, comprising a fixed seat arranged in a lock body, a sliding slot is formed in the fixed seat, a lock tongue is installed in the sliding slot, and a lock hole corresponding to the sliding slot is formed in the side wall of the lock body.

[0006] The lock tongue is further provided with a driving hole, a rotatable roller is arranged in the driving hole, the roller is sleeved on the fixed rod of a gear, the gear is meshed with a worm, and the worm rotates under the drive of a motor, so that the lock tongue is driven by the roller to move linearly out of the lock hole or retract into the sliding slot.

[0007] In one embodiment, a circuit board is arranged in the lock body, the motor is arranged on the circuit board, and a battery providing power is connected to the circuit board, so that the battery is used as a power supply to supply power to the circuit board, drive the worm to rotate the gear, and make the lock tongue move linearly and reciprocally, which is low in cost and convenient in power supply.

[0008] In one embodiment, the lock body is composed of a front cover and a rear cover, an installation space is formed between the front cover and the rear cover, the fixed seat, the circuit board and the battery are arranged in the installation space, and the front cover and the rear cover are used to form the lock body structure, and the remaining structural members are arranged in the installation space, only the lock hole is left for the lock tongue to enter and exit, and the stability of the lock body structure is maintained.

[0009] In one embodiment, the front cover is provided with a mounting cabin at one end away from the lock tongue, the battery is arranged in the mounting cabin, and a cover plate is arranged on the mounting cabin and flush with the front cover.

[0010] In one embodiment, one end of the fixing seat is fixedly connected with the circuit board, and the circuit board and the fixing seat are both fixed on the front cover.

[0011] In one embodiment, the gear is provided with a mounting ring concentric with the gear at one end close to the lock tongue, the fixing rod is arranged on the mounting ring, and the roller is sleeved on the fixing rod and avoids the worm.

[0012] In one embodiment, the driving hole is in an elliptical structure, the diameter of the roller is smaller than the minor axis diameter of the driving hole, and the diameter of the mounting ring is greater than the major axis diameter of the driving hole.

[0013] In one embodiment, the side walls of the front cover and the rear cover are provided with matching notches to form the lock opening.

[0014] In one embodiment, the side walls of the front cover and the rear cover are further provided with matching connecting openings, and a twist lock is arranged on the connecting openings to fasten the front cover and the rear cover together.

[0015] In one embodiment, the circuit board and the fixing seat are both fixed on the front cover by screws.

[0016] The utility model discloses the beneficial effect lies in:

[0017] The worm gear transmission mode is adopted, that is, the worm coaxial with the motor is used to drive the gear to rotate, the lock tongue is overlapped with the gear and the worm in space, the roller driving the lock tongue is also overlapped with the gear in space, so that the volume of the lock body is greatly reduced, the stable transmission effect is maintained, the noise is low, the transmission ratio is large, the bearing capacity is strong, the load rotation can be prevented, the self-locking property is achieved, the anti-theft effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Hereinafter, the utility model will be described in more detail based on the embodiments and with reference to the drawings.

[0019] Among them:

[0020] Figure 1 The structural schematic diagram (explosion diagram) of one embodiment of the utility model is shown;

[0021] Figure 2 The structural schematic diagram of the utility model when the rear cover is not buckled is shown;

[0022] Figure 3 The structural schematic diagram of the fixed seat and the circuit board connection of the utility model is shown;

[0023] Figure 4 The structural schematic diagram of the fixed seat of the utility model is shown;

[0024] Figure 5 The structural schematic diagram of the roller and the lock tongue cooperation of the utility model is shown;

[0025] Figure 6 The structural schematic diagram of the gear and the worm engagement of the utility model is shown;

[0026] In the drawings, the same parts use the same reference numerals. The drawings are not in accordance with the actual scale.

[0027] Reference numerals:

[0028] 1-fixed seat, 2-lock tongue, 3-worm, 4-gear, 5-motor, 6-battery, 7-circuit board, 8-front cover, 9-rear cover, 10-cover plate, 11-latch, 12-screw, 13-connection piece, 14-light guide column, 15-roller, 16-fixing rod, 17-mounting ring, 18-notch, 19-connection port, 101-sliding groove, 102-connection part, 201-driving hole. DETAILED DESCRIPTION

[0029] The utility model will be further described below in combination with the drawings.

[0030] The utility model provides a worm gear transmission drawer lock, like Figure 1 , Figure 3 andFigure 5 As shown, including the fixed seat 1 set in the lock body, the fixed seat 1 is provided with a sliding slot 101, the lock tongue 2 is installed in the sliding slot 101, and the side wall of the lock body has a lock opening corresponding to the sliding slot 101;

[0031] Wherein, the lock tongue 2 is also provided with a driving hole 201, a rotating roller 15 is arranged in the driving hole 201, the rotating roller 15 is sleeved on the fixed rod 16 of the gear 4, the gear 4 is engaged with the worm 3, the worm 3 rotates under the drive of the motor 5, so that the lock tongue 2 is driven by the rotating roller 15 to move linearly out of the lock opening or retract into the sliding slot 101;

[0032] Specifically, one end of the gear 4 near the lock tongue 2 is provided with a mounting ring 17 concentric with the gear 4, the fixed rod 16 is arranged on the mounting ring 17, and the rotating roller 15 is sleeved on the fixed rod 16 and avoids the worm 3, that is, the fixed rod 16 arranged on the mounting ring 17 rotates along the axis of the gear 4, while the rotating roller 15 is sleeved on the fixed rod 16 and moves together, and the rotating roller 15 is located in the driving hole 201 of the lock tongue 2, that is, the rotating roller 15 drives the lock tongue 2 to move linearly under the limitation of the sliding slot 101, the circuit board 7 is further arranged in the lock body, the motor 5 is arranged on the circuit board 7, the battery 6 connected with the circuit board 7 provides power, the battery 6 is used as a power supply to supply power to the circuit board 7, the worm 3 is driven to rotate the gear 4, so that the lock tongue 2 moves linearly, which is low in cost and convenient in power supply;

[0033] In one embodiment, as shown in Figure 6 The driving hole 201 has an elliptical structure, the diameter of the rotating roller 15 is smaller than the short axis diameter of the driving hole 201, and the diameter of the mounting ring 17 is greater than the long axis diameter of the driving hole 201, that is, the rotating roller 15 can move freely in the driving hole 201, and can contact the inner wall of the driving hole 201 during rotation, thereby exerting a force on the lock tongue 2 to move forward and backward;

[0034] In one embodiment, as shown in Figure 2 The lock body is composed of the front cover 8 and the rear cover 9, the mounting space is formed between the front cover 8 and the rear cover 9, the fixed seat 1, the circuit board 7 and the battery 6 are arranged in the mounting space, that is, the front cover 8 and the rear cover 9 are used to form the lock body structure, and the remaining structural members are arranged in the mounting space, only the lock opening is left for the lock tongue 2 to enter and exit, so as to maintain the stability of the lock body structure;

[0035] Further, the end of the front cover 8 away from the lock tongue 2 is provided with a mounting cabin, the battery 6 is arranged in the mounting cabin, the mounting cabin is provided with a cover plate 10, the cover plate 10 is flush with the front cover 8, and the separately arranged mounting cabin cooperates with the cover plate 10 to fix the battery 6, thereby improving the safety of the lock body, facilitating replacement of the battery 6, and maintaining the overall structure of the front cover 8 after the cover plate 10 is covered;

[0036] In one embodiment, as shown inFigure 3 as well as Figure 4 As shown, one end of the fixing base 1 has a connecting part 102 connected to the circuit board 7, and the other end is fixed to the front cover 8 by screws 12. At the same time, the circuit board 7 is also fixed to the front cover 8 by screws 12. The circuit board 7 and the fixing base 1 are fixed to the front cover 8 at the same time. That is, after the installation is completed, the lock body can be installed by snapping on the back cover 9. At the same time, the fixing base 1 is also fixedly connected to the circuit board 7 to limit the slide 101 and prevent it from being displaced by the movement of the lock tongue 2, thus affecting the effect of the lock body. In the installation process, the motor 5, worm gear 3 and gear 4 are first installed on the front cover 8, the lock tongue 2 is pre-assembled in the fixing base 1, the roller 15 on the gear 4 is passed through the drive hole 201 on the lock tongue 2, that is, the fixing base 1 is installed on the front cover 8, and finally the back cover 9 is snapped on.

[0037] Specifically, such as Figure 1 As shown, the front cover 8 and the rear cover 9 have matching notches 18 on their side walls to form a locking port. The front cover 8 and the rear cover 9 also have matching connection ports 19 on their side walls, on which a rotary lock 11 is installed to fasten the front cover 8 and the rear cover 9 together.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A worm-and-gear drive drawer lock characterized by, The fixed seat is provided in the lock body, a sliding slot is formed in the fixed seat, a lock tongue is installed in the sliding slot, and a lock hole corresponding to the sliding slot is formed in the side wall of the lock body; The driving hole is formed in the lock tongue, a rotating roller is arranged in the driving hole, the roller is sleeved on a fixed rod of a gear, the gear is engaged with a worm, the worm rotates under the driving of a motor, and the lock tongue is linearly moved out of the lock hole or retracted into the sliding slot under the driving of the roller.

2. A worm and gear drive drawer lock according to claim 1, wherein, The circuit board is arranged in the lock body, the motor is arranged on the circuit board, and a battery providing power is connected to the circuit board.

3. A worm and gear drive drawer lock according to claim 2, wherein, The lock body is composed of a front cover and a rear cover, an installation space is formed between the front cover and the rear cover, and the fixed seat, the circuit board and the battery are arranged in the installation space.

4. A worm and gear drive drawer lock according to claim 3, wherein, An installation cabin is formed in the end of the front cover away from the lock tongue, the battery is arranged in the installation cabin, a cover plate is arranged on the installation cabin, and the cover plate is flush with the front cover.

5. A worm and gear drive drawer lock according to claim 4, wherein, One end of the fixed seat is fixedly connected with the circuit board, and the circuit board and the fixed seat are fixed on the front cover.

6. A worm and gear drive drawer lock according to claim 1, wherein, The gear is provided with an installation ring concentric with the gear at the end close to the lock tongue, the fixed rod is arranged on the installation ring, and the roller is sleeved on the fixed rod and avoids the worm.

7. A worm and gear drive drawer lock according to claim 6, wherein, The driving hole is in an elliptical structure, the diameter of the roller is smaller than the minor axis diameter of the driving hole, and the diameter of the installation ring is greater than the major axis diameter of the driving hole.

8. A worm and gear drive drawer lock according to claim 3, wherein, The side walls of the front cover and the rear cover are provided with matched notches to form the lock hole.

9. A worm and gear drive drawer lock according to claim 3, wherein, The side walls of the front cover and the rear cover are also provided with matched connecting holes, a turn lock is arranged on the connecting holes, and the front cover and the rear cover are fastened together.

10. A worm and gear drive drawer lock according to claim 5, wherein, The circuit board and the fixed seat are fixed on the front cover by screws.

Images