CN215168954U - Automatic locking mechanism of confidential cabinet - Google Patents

Abstract

The utility model provides a secret cabinet automatic lock mechanism which characterized in that: the automatic lock mechanism of the confidential cabinet comprises an external mechanism box assembly and an internal cover body assembly; the mechanism box assembly comprises a mechanism box, a rotating shaft is arranged in the middle of the rightmost side of the mechanism box, four sliding columns are respectively arranged above and below the rotating shaft, a threaded hole is formed in the center of each sliding column, a gear is arranged on the outer circle of the rotating shaft, and the gear can rotate around the rotating shaft; a sliding plate is arranged through the sliding column, four waist holes are arranged in the middle of the sliding plate, and the sliding plate can move left and right along the waist holes; the rightmost side of the sliding plate is provided with a connecting hole, a large waist hole is arranged in the middle of the four waist holes, a downward gear tooth is arranged at the upper part of the large waist hole, and the gear tooth is meshed with the gear; the left end of the sliding plate is provided with a long tail, the middle part of the long tail is provided with a first gear tooth facing upwards, the upper part of the long tail is concave and forms a left antenna and a right antenna respectively, the upper part and the lower part of the sliding column are provided with positioning ribs, and an upper sliding plate and a lower sliding plate are arranged in the sliding plate and penetrate through the sliding column.

Description

Automatic locking mechanism of confidential cabinet

Technical Field

The utility model relates to an automatic locking mechanism of a confidential cabinet, which is mainly used in cabinets such as confidential cabinets, filing cabinets, jewelry cabinets or compact shelving door bodies and high-grade furniture.

Background

The intellectualization and automation of the existing household products are a trend of product updating, some conventional boxes and cabinets are manually opened, and particularly, door mechanisms are large and complex in structure. The utility model discloses the mechanism adopts and integrates automatic transmission mechanism, control circuit and environmental protection power supply (lithium electricity) in an organic whole, forms the standard and joins in marriage the subassembly, and the technology is more simplified, simple to operate, forms the modularization production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a secret cabinet automatic locking mechanism through retrenching the design, is through control panel (comparison such as password, fingerprint, finger vein, face identification) signals, and drive gear motor drives the mechanism and opens the tool to lock to open and close the action through micro-gap switch control door body mechanism, this mechanism still is equipped with the emergent lock of opening of emergency simultaneously, can realize emergent opening at circuit fault or unknown reason situation, the utility model discloses a secret cabinet automatic locking mechanism has integrateed master control circuit and environmental protection power, and is small, convenient to use.

The technical scheme of the utility model is that: the automatic lock mechanism of the confidential cabinet comprises an external mechanism box assembly and an internal cover body assembly; the mechanism box assembly comprises a mechanism box, a rotating shaft is arranged in the middle of the rightmost side of the mechanism box, four sliding columns are respectively arranged above and below the rotating shaft, a threaded hole is formed in the center of each sliding column, a gear is arranged on the outer circle of the rotating shaft, and the gear can rotate around the rotating shaft; a sliding plate is arranged through the sliding column, four waist holes are arranged in the middle of the sliding plate, and the sliding plate can move left and right along the waist holes; the rightmost side of the sliding plate is provided with a connecting hole, a large waist hole is arranged in the middle of the four waist holes, a downward gear tooth is arranged at the upper part of the large waist hole, and the gear tooth is meshed with the gear; the left end of the sliding plate is provided with a long tail, the middle part of the long tail is provided with a first gear tooth facing upwards, the upper part of the long tail is concave and forms a left feeler and a right feeler respectively, the upper part and the lower part of the sliding column are provided with positioning ribs, an upper sliding plate and a lower sliding plate are arranged in the sliding plate and penetrate through the sliding column, one end of the upper sliding plate is provided with a first vertical waist hole, the first vertical waist hole can move up and down along the sliding column, the other end of the upper sliding plate is provided with a first horizontal connecting hole, a second gear tooth is arranged beside the first vertical waist hole, and the second gear tooth is meshed with a gear; go up slide and lower slide and inwards be equipped with the gland, the gland four corners is equipped with the counter bore, and the centre is equipped with the round hole, and the round hole is passed in the pivot, and the gland passes the counter bore through four screws and fixes on the traveller.

The upper left end of the mechanism box is provided with a waist-shaped wire passing hole, the right side of the waist-shaped wire passing hole is provided with two positioning holes, two fixing holes are arranged below the positioning holes, a microswitch pressing cover is arranged above the positioning holes and the fixing holes, two positioning columns are arranged at the upper ends of the reverse sides of the microswitch pressing cover, a door closing in-place switch and a door opening in-place switch are arranged on the left side and the right side below the positioning columns, a fixing column is arranged in the middle of the positioning columns, the microswitch pressing cover is reversely buckled on the inner surface of the mechanism box, the positioning columns penetrate through the positioning holes, and screws penetrate through the fixing holes and are fixed on the mechanism box.

An emergency lock hole is formed in the lowest end of the left side of the mechanism box, two upright columns are arranged on the left side and the right side below the emergency lock hole, through holes are formed in the centers of the upright columns, an emergency lock head is arranged on the inner side of each upright column, a first threaded hole is formed in one side of each emergency lock head, and a screw penetrates through the through hole and is screwed into the first threaded hole to fix the emergency lock head; the center of the emergency lock head is provided with two threaded holes II, the inner side of the emergency lock head is provided with a flat square, an eccentric plate is arranged in the emergency lock head, one side of the eccentric plate is provided with an eccentric flat round hole, two sides of the flat round hole are provided with a counter bore I, the edge of the eccentric plate opposite to the flat round hole is provided with a bulge, and a screw penetrates through the counter bore I to fix the eccentric plate on the emergency lock head; three sliding columns I are arranged on the right side of the emergency lock hole, and a threaded hole III is formed in the center of each sliding column I; a motor support is arranged at the lower left corner of the mechanism box, a left baffle is arranged at the leftmost side of the motor support, a left recess is formed in the upper portion of the left baffle, a square groove is formed in the middle of the left side of the motor support, a right baffle is arranged on the right side of the square groove, a right recess is formed in the upper portion of the right baffle, three waist holes II are formed in the right side of the motor support, an upper support plate is arranged on the motor support, a motor shaft round hole is formed in the middle of the upper support plate, motor fixing holes are formed in two sides of the motor shaft round hole, a speed reducing motor is arranged on the lower side of the upper support plate and fixed on the upper support plate through screws, a first gear is arranged above the speed reducing motor, a first sliding column penetrates through the waist holes of the motor support and is fixed through screws, and the first gear is meshed with a first gear; the mechanism box is provided with mounting holes respectively at the upper, lower, left and right sides.

The rear cover is arranged outside the cover body assembly, a convex reinforcement is arranged on the left side of the back side of the rear cover, fixing columns I are arranged on the upper side, the lower side and the right side of the reinforcement, and a circular hole I is arranged on the lower right side of the reinforcement; a main control board is arranged on the left side of the reinforcement, a door closing switch interface and an alarm horn interface are arranged below the main control board, a lithium battery is arranged on the right side of the reinforcement, a setting button is arranged in the round hole I, a housing is arranged on the outer side of the main control board, a counter bore II is arranged at a position of the housing corresponding to the fixing column, and the housing is fixed on the fixing column I through screws; rear cover fixing holes are formed in the upper portion, the lower portion and the left portion of the right side of the mechanism box, a third counter hole is formed in the corresponding position of the rear cover, and a screw penetrates through the third counter hole to fix the cover body assembly on the mechanism box assembly.

When the door opening device is used, a correct password or fingerprint is input, the speed reducing motor rotates, the first gear drives the sliding plate to move left under the action of the first gear and the first gear teeth, the sliding plate drives the gear to rotate, the gear pulls the upper sliding plate and the lower sliding plate to retract, when the sliding plate retracts to the right feeler and is pressed to the door opening in-place switch, the speed reducing motor stops rotating, and the lock is opened; when the door is closed, the door closing switch interface at the lower part of the main control board receives a signal, the speed reducing motor rotates reversely, the first gear drives the sliding plate to move rightwards under the action of the first gear and the first gear teeth, meanwhile, the sliding plate drives the gear to rotate, the gear pulls the upper sliding plate and the lower sliding plate to extend outwards, when the sliding plate extends to the left feeler and presses the door closing in-place switch, the speed reducing motor stops rotating, and the door is locked; when the emergency lock is opened, the key is rotated clockwise, the emergency lock drives the eccentric piece, the eccentric piece pushes the motor support to the left, the motor support pulls the meshed gear I to drive the sliding plate to retract, and when the eccentric piece rotates to the protrusion and is clamped in the left recess, the lock is opened; when the emergency closing is performed, the door is closed, the key is rotated anticlockwise, the emergency lock drives the eccentric piece, the eccentric piece pushes the motor support to the right, the motor support pulls the meshed gear I to drive the sliding plate to extend out, and when the eccentric piece rotates to the protruding block to be clamped in the right sunken position, the lock is closed.

The utility model has the advantages that: is through control panel (comparison such as password, fingerprint, finger vein, face identification), drives gear motor drive mechanism and opens the tool to lock to open and close the action through micro-gap switch control door body mechanism, this mechanism still is equipped with the emergent lock of opening of emergency simultaneously, can realize emergent opening in circuit fault or unknown reason situation, the utility model discloses a confidential cabinet automatic locking mechanism has integrated master control circuit and environmental protection power, and is small, convenient to use.

The product has simple design, low cost and convenient installation and use. The utility model discloses processing is simple and convenient, more has security and novelty.

Drawings

FIG. 1 is a perspective view of an automatic locking mechanism assembly of a privacy cabinet of the present invention;

FIG. 2 is a perspective view of the automatic locking mechanism box assembly of the privacy cabinet of the present invention;

FIG. 3 is a perspective view of an automatic locking mechanism box of the privacy cabinet of the present invention;

FIG. 4 is a perspective view of the slide plate assembly of the automatic locking mechanism of the privacy cabinet of the present invention;

FIG. 5 is a perspective view of the assembly of the gear, the upper slide plate and the lower slide plate of the automatic locking mechanism of the privacy cabinet of the present invention;

FIG. 6 is a perspective view of the assembly of the microswitch gland of the automatic locking mechanism of the privacy cabinet of the present invention;

FIG. 7 is a perspective view of an emergency lock assembly of an automatic locking mechanism of a privacy cabinet of the present invention;

FIG. 8 is a perspective view of the assembly of the motor bracket of the automatic locking mechanism of the privacy cabinet of the present invention;

FIG. 9 is a perspective view of a motor bracket component of an automatic locking mechanism of a privacy cabinet of the present invention;

FIG. 10 is a perspective view of a cover assembly of an automatic locking mechanism of a privacy cabinet of the present invention;

FIG. 11 is a perspective view of the rear cover of the automatic locking mechanism of the privacy cabinet of the present invention;

FIG. 12 is a perspective view of the assembled main control board and lithium battery of the automatic locking mechanism of the privacy cabinet of the present invention;

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1, 2, 3, 4, 5, the lockers automatic lock mechanism includes an exterior mechanism box assembly 1 and an interior cover assembly 2; the mechanism box assembly 1 comprises a mechanism box 3, a rotating shaft 4 is arranged in the middle of the rightmost side of the mechanism box 3, four sliding columns 5 are respectively arranged on the upper side and the lower side of the rotating shaft 4, a threaded hole 6 is formed in the center of each sliding column 5, a gear 7 is arranged on the outer circle of the rotating shaft 4, and the gear 7 can rotate around the rotating shaft 4; a sliding plate 8 is arranged through the sliding column 5, four waist holes 9 are arranged in the middle of the sliding plate 8, and the sliding plate 8 can move left and right along the waist holes 9; a connecting hole 10 is formed in the rightmost side of the sliding plate 8, a large waist hole 11 is formed in the middle of each of the four waist holes 9, a downward gear tooth 12 is arranged at the upper part of each large waist hole 11, and the gear tooth 12 is meshed with the gear 7; the left end of the sliding plate 8 is provided with a long tail 13, the middle part of the long tail 13 is provided with a first gear tooth 14 facing upwards, the upper part of the long tail 13 is concave and forms a left antenna 15 and a right antenna 16 respectively, the upper part and the lower part of the sliding column 5 are provided with positioning ribs 17, an upper sliding plate 18 and a lower sliding plate 19 are arranged in the sliding plate 8 and penetrate through the sliding column 5, one end of the upper sliding plate 18 is provided with two first vertical waist holes 20, the first vertical waist holes 20 can move up and down along the sliding column 5, the other end of the first vertical waist holes is provided with three horizontal connecting holes 21, a second gear tooth 22 is arranged beside the first vertical waist holes 20, and the second gear tooth 22 is meshed with the gear 7; the upper sliding plate 18 and the lower sliding plate 19 are internally provided with a gland 23, four corners of the gland 23 are provided with counter bores 24, the middle of the gland 23 is provided with a round hole 25, the rotating shaft 4 penetrates through the round hole 25, and the gland 23 penetrates through the counter bores 24 through four screws to be fixed on the sliding column 5.

Referring to fig. 2, 3 and 6, the automatic lock mechanism of the privacy cabinet comprises: the leftmost upper end of the mechanism box 3 is provided with a waist-shaped wire passing hole 26, the right side of the waist-shaped wire passing hole 26 is provided with two positioning holes 27, two fixing holes 28 are arranged below the positioning holes 27, a microswitch pressing cover 29 is arranged above the positioning holes 27 and the fixing holes 28, the upper end of the reverse side of the microswitch pressing cover 29 is provided with two positioning columns 30, the left side and the right side below the positioning columns 30 are provided with a door opening in-place switch 31 and a door closing in-place switch 32, the middle of the positioning columns is provided with a fixing column 33, the microswitch pressing cover 29 is reversely buckled on the inner surface of the mechanism box 3, the positioning columns 30 penetrate through the positioning holes 27, and screws penetrate through the fixing holes 28 and are fixed on the mechanism box 3.

Referring to fig. 2, 3, 7, 8 and 9, the automated locker locking mechanism includes: an emergency lock hole 34 is formed in the lowest end of the left side of the mechanism box 3, two upright columns 35 are arranged on the left side and the right side below the emergency lock hole 34, through holes 36 are formed in the centers of the upright columns 35, an emergency lock head 37 is arranged on the inner side of each upright column 35, a threaded hole I38 is formed in one side of each emergency lock head 37, and a screw penetrates through the through hole 36 and is screwed into the threaded hole I38 to fix the emergency lock head 37; the center of the emergency lock head 37 is provided with two threaded holes II 39, the inner side of the emergency lock head 37 is provided with a flat square 40, the inner part of the emergency lock head is provided with an eccentric plate 41, one side of the eccentric plate 41 is provided with an eccentric flat round hole 42, two sides of the flat round hole 42 are provided with counter bores I43, the edge of the eccentric plate 41 opposite to the flat round hole 42 is provided with a bulge 44, and a screw penetrates through the counter bores I43 to fix the eccentric plate 41 on the emergency lock head 37; three sliding columns I45 are arranged on the right side of the emergency lock hole 34, and a threaded hole III 46 is formed in the center of each sliding column I45; a motor support 47 is arranged at the lower left corner of the mechanism box 3, a left baffle plate 48 is arranged at the leftmost side of the motor support 47, a left recess 49 is arranged at the upper part of the left baffle plate 48, a square groove 50 is arranged in the middle of the left side of the motor support 47, a right baffle plate 51 is arranged at the right side of the square groove 50, a right recess 52 is arranged at the upper part of the right baffle plate 51, three waist holes II 53 are arranged at the right side of the motor support 47, an upper support plate 54 is arranged on the motor support 47, a motor shaft round hole 55 is arranged in the middle of the upper support plate 54, motor fixing holes 56 are formed in two sides of the motor shaft round hole 55, a speed reducing motor 57 is arranged at the lower side of the upper support plate 54, the speed reducing motor 57 is fixed on the upper support plate 54 through screws, a first gear 58 is arranged above the speed reducing motor 57, the first sliding column 45 penetrates through the waist holes II 53 of the motor support 47 and is fixed through screws, and the first gear 58 is meshed with the first gear 14; the mechanism box 3 is provided with mounting holes 58-1 at the upper, lower, left and right sides.

Referring to fig. 1, 10, 11 and 12, the automatic locker locking mechanism includes: the outer part of the cover body assembly 2 is provided with a rear cover 59, the left side of the reverse side of the rear cover 59 is provided with a convex reinforcement 60, the upper side, the lower side and the right side of the reinforcement 60 are provided with first fixing columns 61, and the lower right side of the reinforcement 60 is provided with a first round hole 62; a main control board 63 is arranged on the left side of the reinforcement 60, a door closing switch interface 64 and an alarm horn interface 65 are arranged below the main control board 63, a lithium battery 66 is arranged on the right side of the reinforcement 60, a setting button 67 is arranged in a circular hole I62, a housing 68 is arranged on the outer side of the main control board 63, a counter bore II 69 is arranged in the position, corresponding to the first fixing column 61, of the housing 68, and the housing 68 is fixed on the first fixing column 61 through screws; rear cover fixing holes 70 are formed in the upper, lower and left sides of the right side of the mechanism box 3, a counter bore three 71 is formed in the corresponding position of the rear cover 59, and a screw penetrates through the counter bore three 71 to fix the cover body assembly 2 to the mechanism box assembly 1.

When the lock is used, a correct password or fingerprint is input, the speed reducing motor 57 rotates, the first gear 58 drives the sliding plate 8 to move left through the action of the first gear 14, meanwhile, the sliding plate 8 drives the gear 7 to rotate, the gear pulls the upper sliding plate 18 and the lower sliding plate 19 to retract, when the sliding plate 8 retracts to the right feeler 16 and the door opening in-place switch 31 is pressed, the speed reducing motor 57 stops rotating, and the lock is opened; when the door is closed, the door closing switch interface 64 at the lower part of the main control panel receives a signal, the speed reducing motor 57 rotates reversely, the first gear 58 drives the sliding plate 8 to move rightwards under the action of the first gear 14, meanwhile, the sliding plate 8 drives the gear 7 to rotate, the gear pulls the upper sliding plate 18 and the lower sliding plate 19 to extend outwards, and when the sliding plate 8 extends to the left feeler 15 and is pressed to the door closing in-place switch 32, the speed reducing motor 57 stops rotating and locks the door; when the emergency lock is opened, the key is rotated clockwise, the emergency lock 37 drives the eccentric piece 41, the eccentric piece 41 pushes the motor support 47 to the left, the motor support 47 pulls the first gear 58 which is meshed with the first gear to drive the sliding plate 8 to retract, and when the eccentric piece 41 rotates to the protrusion 44 and is clamped in the left recess 49, the lock is opened; when the door is closed in an emergency, the key is rotated anticlockwise, the emergency lock 37 drives the eccentric piece 41, the eccentric piece 41 pushes the motor support 47 to the right, the motor support 47 pulls the first gear 58 engaged with the gear to drive the sliding plate 8 to extend out, and when the eccentric piece 41 rotates to the protrusion 44 to be clamped at the right recess 52, the lock is closed.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (4)

1. The utility model provides a secret cabinet automatic lock mechanism which characterized in that: the automatic lock mechanism of the confidential cabinet comprises an external mechanism box assembly (1) and an internal cover body assembly (2); the mechanism box assembly (1) comprises a mechanism box (3), a rotating shaft (4) is arranged in the middle of the rightmost side of the mechanism box (3), four sliding columns (5) are respectively arranged above and below the rotating shaft (4), a threaded hole (6) is formed in the center of each sliding column (5), a gear (7) is arranged on the outer circle of the rotating shaft (4), and the gear (7) can rotate around the rotating shaft (4); a sliding plate (8) is arranged through the sliding column (5), four waist holes (9) are arranged in the middle of the sliding plate (8), and the sliding plate (8) can move left and right along the waist holes (9); a connecting hole (10) is formed in the rightmost side of the sliding plate (8), a large waist hole (11) is formed in the middle of each of the four waist holes (9), a downward gear tooth (12) is arranged at the upper part of each large waist hole (11), and the gear tooth (12) is meshed with the gear (7); the left end of the sliding plate (8) is provided with a long tail (13), the middle part of the long tail (13) is provided with a gear tooth I (14) which faces upwards, the upper part of the long tail (13) is concave and forms a left antenna (15) and a right antenna (16) respectively, the upper part and the lower part of the sliding column (5) are provided with positioning ribs (17), an upper sliding plate (18) and a lower sliding plate (19) are arranged in the sliding plate (8) and penetrate through the sliding column (5), one end of the upper sliding plate (18) is provided with two vertical waist holes I (20), the vertical waist holes I (20) can move up and down along the sliding column (5), the other end of the sliding plate is provided with three horizontal connecting holes I (21), a gear tooth II (22) is arranged beside the vertical waist hole I (20), and the gear tooth II (22) is meshed with the gear (7); go up slide (18) and slide down (19) and inwards be equipped with gland (23), gland (23) four corners is equipped with counter bore (24), and the centre is equipped with round hole (25), and pivot (4) pass round hole (25), and gland (23) pass counter bore (24) through four screws and fix on traveller (5).

2. The privacy cabinet automatic lock mechanism of claim 1, wherein: the structure is characterized in that a waist-shaped wire passing hole (26) is formed in the leftmost upper end of the mechanism box (3), two positioning holes (27) are formed in the right side of the waist-shaped wire passing hole (26), two fixing holes (28) are formed below the positioning holes (27), a microswitch pressing cover (29) is arranged above the positioning holes (27) and the fixing holes (28), two positioning columns (30) are arranged at the upper ends of the reverse sides of the microswitch pressing cover (29), a door opening in-place switch (31) and a door closing in-place switch (32) are arranged on the left side and the right side below the positioning columns (30), a fixing column (33) is arranged in the middle of the positioning columns, the microswitch pressing cover (29) is reversely buckled on the inner face of the mechanism box (3), the positioning columns (30) penetrate through the positioning holes (27), and screws penetrate through the fixing holes (28) and are fixed on the mechanism box (3).

3. The privacy cabinet automatic lock mechanism of claim 1, wherein: an emergency lock hole (34) is formed in the lowest end of the left side of the mechanism box (3), two upright posts (35) are arranged on the left side and the right side below the emergency lock hole (34), a through hole (36) is formed in the centers of the upright posts (35), an emergency lock head (37) is arranged on the inner side of each upright post (35), a first threaded hole (38) is formed in one side of each emergency lock head (37), and a screw penetrates through the through hole (36) and is screwed into the first threaded hole (38) to fix the emergency lock head (37); two threaded holes II (39) are formed in the center of the emergency lock head (37), a flat square (40) is arranged on the inner side of the emergency lock head (37), an eccentric sheet (41) is arranged inside the emergency lock head, an eccentric flat round hole (42) is formed in one side of the eccentric sheet (41), counterbores I (43) are formed in two sides of the flat round hole (42), protrusions (44) are arranged on the edges of the eccentric sheet (41) opposite to the flat round hole (42), and a screw penetrates through the counterbores I (43) to fix the eccentric sheet (41) on the emergency lock head (37); three sliding columns I (45) are arranged on the right side of the emergency lock hole (34), and a threaded hole III (46) is formed in the center of each sliding column I (45); a motor bracket (47) is arranged at the lower left corner of the mechanism box (3), a left baffle plate (48) is arranged at the leftmost side of the motor bracket (47), a left recess (49) is arranged at the upper part of the left baffle plate (48), a square groove (50) is arranged in the middle of the left side of the motor bracket (47), a right baffle plate (51) is arranged at the right side of the square groove (50), a right recess (52) is arranged at the upper part of the right baffle plate (51), three waist holes II (53) are arranged at the right side of the motor bracket (47), an upper support plate (54) is arranged on the motor bracket (47), a motor shaft round hole (55) is arranged in the middle of the upper support plate (54), motor fixing holes (56) are arranged at two sides of the motor shaft round hole (55), a speed reducing motor (57) is arranged at the lower side of the upper support plate (54), the speed reducing motor (57) is fixed on the upper support plate (54) through screws, a first gear (58) is arranged above the speed reducing motor (57), a sliding column I (45) penetrates through the waist holes II (53) of the motor bracket (47) and is fixed through screws, the first gear (58) is meshed with the first gear tooth (14); the mechanism box (3) is provided with mounting holes (58-1) respectively at the upper, lower, left and right sides.

4. The privacy cabinet automatic lock mechanism of claim 1, wherein: a rear cover (59) is arranged outside the cover body assembly (2), a convex-shaped reinforcement (60) is arranged on the left side of the reverse side of the rear cover (59), fixing columns (61) are arranged on the upper side, the lower side and the right side of the reinforcement (60), and a circular hole I (62) is arranged on the lower right side of the reinforcement (60); a main control board (63) is arranged on the left side of the reinforcement (60), a door closing switch interface (64) and an alarm horn interface (65) are arranged below the main control board (63), a lithium battery (66) is arranged on the right side of the reinforcement (60), a setting button (67) is arranged in the round hole I (62), a housing (68) is arranged on the outer side of the main control board (63), a counter bore II (69) is arranged in the position, corresponding to the fixing column I (61), of the housing (68), and the housing (68) is fixed on the fixing column I (61) through screws; rear cover fixing holes (70) are formed in the upper and lower sides and the left side of the right side of the mechanism box (3), a counter bore III (71) is formed in the corresponding position of the rear cover (59), and a screw penetrates through the counter bore III (71) to fix the cover body assembly (2) on the mechanism box assembly (1).

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