Small-size electromagnetic door lock device with manual unlocking function

Abstract

The technical scheme of the utility model discloses a small-size electromagnetic door lock device with a manual unlocking function. The small-size electromagnetic door lock device comprises a base, a bottom box, a cam seat, a sliding frame, a door bolt, an unlocking pull rod, a long sliding block and a cam, the bottom box and the cam seat are installed on the base, the cam seat is arranged on the front side of the bottom box, the sliding frame and the door pin are arranged in the bottom box, the upper portion of the door pin is clamped on the sliding frame, and the lower portion of the door pin sequentially penetrates through the bottom box and the long sliding block in a penetrating mode. The unlocking pull rod and the long sliding block are arranged between the base and the bottom box, the front end of the unlocking pull rod is movably connected with the sliding frame, and the rear end extends to the rear side of the base; the long sliding block extends to the cam base from the bottom box, the front portion of the long sliding block is movably connected with the cam, and the cam is arranged in an inner cavity of the cam base. Through cooperation of the unlocking pull rod, the sliding frame, the door bolt, the long sliding block and other structures, the manual unlocking function of the door lock is achieved, and the unlocking pull rod is simple in structure, easy to manufacture and high in reliability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electrical equipment door lock, specifically relates to a small size electromagnetic door lock device with manual unlocking function. BACKGROUND

[0002] The door lock of the electrical equipment such as washing machine can lock or release the door hook according to the signal of the control part, to realize the opening and closing of the door. In order to prevent the situation that the door lock cannot be opened when the equipment suddenly loses power, it is usually necessary to set a manual unlocking structure on the door lock, and the unlocking of the door lock and the door hook is realized through the manual unlocking structure. The existing door lock is mostly square door lock, which is large in size and occupies large space, and cannot meet the use requirement of small size washing machine.

[0003] Patent CN 106436176 A discloses a washing machine door lock device, which comprises a door hook, a lock body, an internal locking component cooperated with the door hook and movable between the locking position and the release position, an emergency unlocking device for opening the washing machine door in emergency, the emergency unlocking device comprises a pull rod arranged outside the mounting base, a pull rod contact arranged on the pull rod, and an opening arranged on the mounting base relative to the pull rod contact. When the emergency unlocking device is unlocked, the pull rod is pulled, the pull rod contact pushes the peach heart sliding block to move to the locking position, and the pull rod limiting surface and the mounting base surface are in contact so that the pull rod cannot be pulled down any more. The limiting block and the dynamic insert piece move to the unlocking position and the disconnection position respectively, at this time, the limiting block releases the locking of the transmission sliding block, and the washing machine door plate can be opened by pulling gently. The problem of large size of the washing machine door lock is overcome, but the pull rod is arranged outside the base and the structure is complex, occupies space, and the mold manufacturing difficulty is high, the assembly efficiency is low, and the appearance is not beautiful. In addition, the washing machine door is opened and the door lock is powered off through the connecting rod mechanism (rotary rod, push rod and push rod spring), the connecting rod mechanism has high manufacturing cost and complex assembly process, and the product reliability is low. Therefore, it is necessary to develop an electromagnetic door lock device with manual unlocking function, which is arranged in the base, small in space occupation, simple in structure, easy to assemble and high in reliability. UTILITY MODEL CONTENTS

[0004] In order to solve the existing technical problems, the utility model provides a small size electromagnetic door lock device with manual unlocking function, which realizes the manual unlocking function of the door lock through the cooperation of the unlocking pull rod, the sliding frame, the door pin and the long sliding block and other structures. The unlocking pull rod structure is simple, easy to manufacture and high in reliability.

[0005] The utility model discloses a technical scheme is: a small -size electromagnetic door lock device with manual unlocking function, including base, bottom box, cam seat, sliding frame, door bolt, unlocking pull rod, long slide block and cam, bottom box and cam seat are installed on the base, and the cam seat sets up at the front side of bottom box, and the sliding frame and door bolt set up in the bottom box, and the upper portion of door bolt is clamped on the sliding frame, and the lower part of door bolt is inserted in bottom box and long slide block in proper order,

[0006] Unlocking pull rod and long slide block set up between base and bottom box, and the front end of unlocking pull rod is movably connected with sliding frame, and the rear end extends to the rear side of base, long slide block extends from bottom box to cam seat, and the front part of long slide block is movably connected with cam, and the cam sets up in the inner chamber of cam seat.

[0007] Further, the lower end of the sliding frame is provided with a triangular limiting block, the bottom surface of the bottom box is provided with a straight sliding groove, the triangular limiting block passes through the straight sliding groove and moves along the straight sliding groove, the front end of the unlocking pull rod is provided with a limiting surface, the inner side of the limiting surface is provided with a clearance, and the limiting surface and the clearance are matched with the triangular limiting block.

[0008] Further, the inner wall of the base is provided with a limiting groove, a sliding rail and a clamping rib, the limiting groove is arranged at the rear end of the base and matched with the rear part of the unlocking pull rod, the sliding rail is arranged at the middle part of the base, the middle part of the unlocking pull rod moves forward and backward along the sliding rail, the clamping rib is arranged on the side wall of the sliding rail, the middle part of the unlocking pull rod is provided with a clamping groove, the clamping groove extends in the front-rear direction, the middle part of the clamping groove is provided with a limiting protrusion, and the clamping rib is arranged in the clamping groove.

[0009] Further, the inner wall of the base is provided with a long slide block spring and an unlocking pull rod spring, one end of the long slide block spring is installed on the base, and the other end is connected with the long slide block, one end of the unlocking pull rod spring is installed on the base, and the other end is connected with the unlocking pull rod.

[0010] Further, the lower end surface of the long slide block is provided with a long slide block spring accommodating groove, the long slide block spring is installed in the long slide block spring accommodating groove, the lower end surface of the unlocking pull rod is provided with an unlocking pull rod spring accommodating groove, and the unlocking pull rod spring is installed in the unlocking pull rod spring accommodating groove.

[0011] Further, the long slide block is provided with a door bolt locking hole, and the bottom surface of the bottom box is provided with a bottom door bolt hole, and the door bolt locking hole and the bottom door bolt hole are matched with the door bolt.

[0012] Further, the upper end surface of the long slide block is provided with a sliding groove, and the sliding groove has a structure of being low in front and high in back, the bottom box is provided with a jacking rod and a conductive sheet, the jacking rod is movably connected with the bottom box, the top of the jacking rod is movably connected with the conductive sheet, the bottom of the jacking rod passes through the bottom box and is movably connected with the sliding groove, the conductive sheet is movably connected with a coil and a terminal assembly, and the conductive sheet is clamped on the door bolt.

[0013] Further, a slide rail is arranged on the side wall of the slide frame, the slide rail has a structure of high front and low back, a convex arm is arranged on the upper side of the door pin, and the convex arm is movably connected to the upper end surface of the slide rail.

[0014] Further, the cam is rotatably arranged on a cam seat through a cam shaft, a torsion spring is arranged in the inner cavity of the cam seat, one end of the torsion spring is arranged on the cam, and the other end is connected with the cam seat; a coil is arranged in the inner cavity of the bottom box, an iron core is movably inserted into the coil, the front end of the iron core is clamped in the slide frame, a guide needle is arranged, one end of the guide needle is movably inserted into the inner wall of the bottom box, and the other end is movably connected with the heart-shaped track structure of the slide frame, and an electric appliance box upper cover is arranged above the bottom box and clamped on the bottom box.

[0015] By adopting the technical scheme, the utility model has the beneficial effects as follows:

[0016] (1) The utility model discloses a door lock, which is characterized by comprising an unlocking pull rod, a slide frame, a door pin and a long slide block.

[0017] (2) The door lock is small in size and occupies small space, and can meet the installation of washing machines of various sizes.

[0018] (3) The door opening and power-off function is realized by the relative movement of the jacking rod and the long slide block, and the utility model has the advantages of low manufacturing cost, simple assembly and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model;

[0020] Figure 2 It is an exploded structural schematic view of the utility model;

[0021] Figure 3 It is a structural schematic view of the utility model without a cam seat and an electric appliance box upper cover;

[0022] Figure 4 It is a structural schematic view of the bottom seat and the unlocking pull rod of the utility model;

[0023] Figure 5 It is a structural schematic view of the slide frame of the utility model when the door lock is in a locked state;

[0024] Figure 6 It is a structural schematic view of the slide frame of the utility model when the door lock is in an unlocked state;

[0025] Figure 7 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model;

[0026] Figure 8 Structure diagram of unlocking pull rod when door lock is in unlocking state of the utility model;

[0027] Figure 9 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model;

[0028] Figure 10 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model;

[0029] Figure 11 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model;

[0030] Figure 12 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model;

[0031] Figure 13 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model;

[0032] Figure 14 Structure diagram of unlocking pull rod when door lock is in locking state of the utility model.

[0033] In the figure, 1, base; 2, bottom box; 3, cam seat; 4, sliding frame; 5, door bolt; 6, unlocking pull rod; 7, long slide block; 8, cam; 9, top rod; 10, conducting sheet; 11, limiting groove; 12, slide rail; 13, clamping rib; 14, long slide block spring; 15, unlocking pull rod spring; 21, straight line sliding slot; 22, bottom door bolt hole; 41, triangular limiting block; 42, slide rail; 43, heart-shaped track structure; 51, convex arm; 61, limiting surface; 62, clearance; 63, clamping groove; 64 limiting protrusion; 65, unlocking pull rod spring accommodating groove; 71, long slide block spring accommodating groove; 72, sliding groove; 73, door bolt locking hole; 101, terminal assembly; 102, cam shaft; 103, torsional spring; 104, iron core; 105, guide needle; 106, electrical box upper cover; door hook 107. DETAILED DESCRIPTION

[0034] The utility model will be explained further in detail in combination with the drawings and specific embodiments. EMBODIMENT

[0035] REFERENCE Figures 1-6The utility model provides a small size electromagnetic door lock device with manual unlocking function, including base 1, bottom box 2, cam seat 3, sliding frame 4, door bolt 5, unlocking pull rod 6, long slide block 7 and cam 8, bottom box 2 and cam seat 3 are installed on base 1, cam seat 3 is arranged in the front side of bottom box 2, sliding frame 4 and door bolt 5 are arranged in bottom box 2, the upper portion of door bolt 5 is clamped on sliding frame 4, and the lower portion of door bolt 5 is inserted in bottom box 2 and long slide block 7 in proper order, and the front and back movement of sliding frame 4 can drive door bolt 5 to move up and down, when door bolt 5 is at the uppermost end, the lower end of door bolt 5 is flush with the bottom surface of bottom box 2, and at this time, long slide block 7 can move back and forth, when door bolt 5 is at the lowermost end, the lower end of door bolt 5 is inserted into long slide block 7 through bottom box 2, and long slide block 7 is limited by door bolt 5 and cannot move.

[0036] Unlocking pull rod 6 and long slide block 7 are arranged between base 1 and bottom box 2, the front end of unlocking pull rod 6 is movably connected with sliding frame 4, and the rear end extends to the rear side of base 1, long slide block 7 extends from bottom box 2 to cam seat 3, the front portion of long slide block 7 is movably connected with cam 8, and cam 8 is arranged in the inner cavity of cam seat 3, long slide block 7 is matched with cam 8, and cam 8 limits the front end of long slide block 7.

[0037] Further, the lower end of sliding frame 4 is provided with a triangular limiting block 41, the bottom surface of bottom box 2 is provided with a straight sliding groove 21, the triangular limiting block 41 passes through the straight sliding groove 21 and moves along the straight sliding groove 21, the front end of unlocking pull rod 6 is provided with a limiting face 61, the inner side of limiting face 61 is provided with a clearance 62, and limiting face 61 and clearance 62 are matched with triangular limiting block 41, when unlocking pull rod 6 moves back, limiting face 61 is in surface-to-surface contact with the inclined surface of triangular limiting block 41, at this time, the front side of triangular limiting block 41 is inserted into clearance 62, ensuring that limiting face 61 and triangular limiting block 41 maintain the maximum contact range, and sliding frame 4 is driven to move back by triangular limiting block 41, and the cooperation of straight sliding groove 21 and triangular limiting block 41 ensures that sliding frame 4 moves linearly when moving back and forth.

[0038] Furthermore, the inner wall of the base 1 is provided with a limiting groove 11, a slide rail 12, and a retaining rib 13. The limiting groove 11 is located at the rear end of the base 1 and is adapted to the rear part of the unlocking lever 6. The slide rail 12 is located in the middle of the base 1, and the middle part of the unlocking lever 6 moves back and forth along the slide rail 12. A retaining rib 13 is provided on the side wall of the slide rail 12, and a retaining groove 63 is provided in the middle part of the unlocking lever 6. The retaining groove 63 extends in the front-back direction, and a limiting protrusion 64 is provided in the middle part of the retaining groove 63. The retaining rib 13 is located in the retaining groove 63. When the rear part of the unlocking lever 6 is pulled, causing the unlocking lever 6 to move backward, the limiting protrusion 64 moves to contact the retaining rib 13, and the unlocking lever 6 stops moving. At this time, the unlocking lever 6 drives the sliding frame 4 to move backward to the unlocking position, completing the manual unlocking. When the unlocking lever 6 is released, the unlocking lever 6 moves forward due to the force of the unlocking lever spring 15. When the limiting groove 11 contacts the rear of the unlocking lever 6, the unlocking lever 6 stops moving forward. At this time, the unlocking lever spring 15 returns to the initial position, and the unlocking lever 6 returns to its original position.

[0039] Furthermore, a long slider spring 14 and an unlocking lever spring 15 are provided on the inner wall of the base 1. One end of the long slider spring 14 is mounted on the base 1, and the other end is connected to the long slider 7; one end of the unlocking lever spring 15 is mounted on the base 1, and the other end is connected to the unlocking lever 6. When the cam 8 rotates and no longer limits the long slider 7, the long slider spring 14 drives the long slider 7 to move backward. After the unlocking lever 6 is pulled backward to complete the manual unlocking of the door lock, the unlocking lever 6 is released, and the unlocking lever spring 15 drives the unlocking lever 6 to move forward to return to its original position.

[0040] Furthermore, the lower end face of the long slider 7 is provided with a long slider spring receiving groove 71, and the long slider spring 14 is installed in the long slider spring receiving groove 71. The lower end face of the unlocking lever 6 is provided with an unlocking lever spring receiving groove 65, and the unlocking lever spring 15 is installed in the unlocking lever spring receiving groove 65.

[0041] Furthermore, the long slider 7 is provided with a door pin locking hole 73, and the bottom surface of the base box is provided with a bottom door pin hole 22. Both the door pin locking hole 73 and the bottom door pin hole 22 are adapted to the door pin 5. The bottom of the door pin 5 passes through the bottom door pin hole 22 and the door pin locking hole 73 from top to bottom.

[0042] Furthermore, the upper end face of the long slider 7 is provided with a sliding groove 72, which has a structure that is lower in the front and higher in the back; the bottom box 2 is provided with a top rod 9 and a conductive sheet 10, the top rod 9 is movably connected to the bottom box 2, the top of the top rod 9 is movably connected to the conductive sheet 10, the bottom of the top rod 9 passes through the bottom box 2 and is movably connected to the sliding groove 72, the conductive sheet 10 is movably connected to the coil and terminal assembly 101, and the conductive sheet 10 is snapped onto the door pin 5.

[0043] The front part of the conductive sheet 10 is clamped in the door pin 5, the door pin 5 moves up and down to drive the conductive sheet 10 to move up and down, and the rear part of the conductive sheet 10 is movably connected with the top rod 9.When the long sliding block 7 moves forward, the top rod 9 gradually moves to the rear side of the sliding groove 72, so that the top rod 9 moves upward, drives the conductive sheet 10 to lift up and be separated from the coil, so that the coil is in a non-powered state, at this time, the door lock is in an open but non-powered state, even if the washing machine is powered on, the door lock will not move. When the long sliding block 7 moves backward, the top rod 9 gradually moves to the front part of the sliding groove 72, so that the top rod 9 moves downward, drives the conductive sheet 10 to move downward and contact the coil, so that the coil is in a powered state, at this time, the door lock is in a closed and powered state, and the washing machine is powered on to enter a normal running state.

[0044] Further, the side wall of the sliding frame 4 is provided with a sliding rail 42, the sliding rail 42 is of a structure that is high in front and low in back, the upper side of the door pin 5 is provided with a convex arm 51, and the convex arm 51 is movably connected to the upper end face of the sliding rail 42.

[0045] Further, the cam 8 is rotatably installed on the cam seat 3 through a cam shaft 102, a torsion spring 103 is arranged in the inner cavity of the cam seat 3, one end of the torsion spring 103 is installed on the cam 8, and the other end is connected with the cam seat 3; a coil is installed in the inner cavity of the bottom box 2, an iron core 104 is movably inserted in the coil, the front end of the iron core 104 is clamped in the sliding frame 4; a guide pin 105 is arranged in the inner cavity of the bottom box 2, one end of the guide pin 105 is movably inserted in the inner wall of the bottom box 2, and the other end is movably connected with the heart-shaped track structure 43 of the sliding frame 4; an electrical box upper cover 106 is installed above the bottom box 2, and the electrical box upper cover 106 is clamped on the bottom box 2. When the coil is connected with the power supply, the iron core 104 is driven to move, the sliding frame 4 is shifted forward, the guide pin 105 moves in the heart-shaped track structure 43 and is limited by the heart-shaped track structure 43, the sliding frame 4 drives the door pin 5 to move downward, the bottom of the door pin 5 is inserted into the door pin locking hole 73 of the long sliding block 7, the movement of the long sliding block 7 is prevented, and the locking process of the door lock is completed.

[0046] The working process of the small-size electromagnetic door lock device with the manual unlocking function is as follows: when the washing machine door is not closed, the long sliding block 7 is located at the most front end, at this time, the top rod 9 is located at the rear side of the sliding groove 72, the top rod 9 is in a state of being lifted upward, drives the conductive sheet 10 to be separated from the coil, so that the door lock is in a non-powered state, at this time, even if the washing machine is powered on, the door lock will not move, and the open-door power-off function is realized.

[0047] When the washing machine door is closed, that is, the door hook 107 is inserted into the lock body, at this time, the cam 8 rotates around the cam shaft 102, releasing the long slide block 7, the long slide block 7 is moved backward under the action of the long slide block spring 14, so that the top rod 9 is released in the front of the sliding groove 72 of the long slide block 7, the top rod 9 moves downward, driving the conductive sheet 10 to contact the coil, so that the door lock is powered on, at this time the washing machine enters the normal running state.

[0048] When the washing machine is locked, the power is turned on to drive the coil to move the iron core 104, drive the sliding frame 4 to move forward, so that the convex arm 51 of the door pin 5 moves to the rear side of the slide rail 42, the door pin 5 falls, the lower end of the door pin 5 is inserted into the door pin locking hole 73 of the long slide block 7, preventing the long slide block 7 from moving, completing the locking process.

[0049] When the washing machine stops working, the power is turned on to drive the coil to move the iron core 104, drive the sliding frame 4 to move backward, so that the door pin 5 moves to the front side of the slide rail 42, the door pin 5 rises, the lower end of the door pin 5 retreats to flush with the bottom surface of the bottom box 2, the long slide block 7 is not blocked by the door pin 5 and can move forward to return to the original position, the door hook 107 is pulled out, completing the unlocking process.

[0050] When the washing machine door cannot be opened due to sudden power failure or other reasons during the working process of the washing machine, manually pull the unlocking pull rod 6 backward, the unlocking pull rod 6 applies a backward force to the triangular limiting block 41 of the sliding frame 4 through the limiting surface 61, the triangular limiting block 41 moves backward along the straight line sliding groove 21, drives the sliding frame 4 to move backward, so that the door pin 5 rises, the lower end of the door pin 5 retreats to flush with the bottom surface of the bottom box 2, the long slide block 7 is not blocked by the door pin 5 and can move forward to return to the original position, the door hook 107 is pulled out, completing the manual unlocking process of the door lock.

Claims

1. A small-sized electromagnetic door lock device with manual unlocking function, characterized in that: The utility model provides a door lock, which comprises a base (1), a bottom box (2), a cam seat (3), a sliding frame (4), a door bolt (5), an unlocking pull rod (6), a long sliding block (7) and a cam (8); the bottom box (2) and the cam seat (3) are installed on the base (1), the cam seat (3) is arranged on the front side of the bottom box (2), the sliding frame (4) and the door bolt (5) are arranged in the bottom box (2), the upper part of the door bolt (5) is clamped on the sliding frame (4), and the lower part of the door bolt (5) is sequentially inserted into the bottom box (2) and the long sliding block (7); the unlocking pull rod (6) and the long sliding block (7) are arranged between the base (1) and the bottom box (2), the front end of the unlocking pull rod (6) is movably connected with the sliding frame (4), and the rear end extends to the rear side of the base (1); the long sliding block (7) extends from the bottom box (2) to the cam seat (3), the front part of the long sliding block (7) is movably connected with the cam (8), and the cam (8) is arranged in the inner cavity of the cam seat (3).

2. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The lower end of the sliding frame (4) is provided with a triangular limiting block (41), the bottom surface of the bottom box (2) is provided with a straight sliding groove (21), the triangular limiting block (41) passes through the straight sliding groove (21) and moves along the straight sliding groove (21); the front end of the unlocking pull rod (6) is provided with a limiting surface (61), the inner side of the limiting surface (61) is provided with a clearance (62), and the limiting surface (61) and the clearance (62) are matched with the triangular limiting block (41).

3. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The inner wall of the base (1) is provided with a limiting groove (11), a sliding rail (12) and a clamping rib (13), the limiting groove (11) is arranged at the rear end of the base (1) and matched with the rear part of the unlocking pull rod (6), the sliding rail (12) is arranged at the middle part of the base (1), the middle part of the unlocking pull rod (6) moves forward and backward along the sliding rail (12), the clamping rib (13) is arranged on the side wall of the sliding rail (12), the middle part of the unlocking pull rod (6) is provided with a clamping groove (63), the clamping groove (63) extends in the front-rear direction, the middle part of the clamping groove (63) is provided with a limiting protrusion (64), and the clamping rib (13) is arranged in the clamping groove (63).

4. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The inner wall of the base (1) is provided with a long sliding block spring (14) and an unlocking pull rod spring (15), one end of the long sliding block spring (14) is installed on the base (1), and the other end is connected with the long sliding block (7); one end of the unlocking pull rod spring (15) is installed on the base (1), and the other end is connected with the unlocking pull rod (6).

5. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 4, characterized in that: The lower end surface of the long sliding block (7) is provided with a long sliding block spring accommodating groove (71), the long sliding block spring (14) is installed in the long sliding block spring accommodating groove (71), the lower end surface of the unlocking pull rod (6) is provided with an unlocking pull rod spring accommodating groove (65), and the unlocking pull rod spring (15) is installed in the unlocking pull rod spring accommodating groove (65).

6. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The long sliding block (7) is provided with a door bolt locking hole (73), and the bottom surface of the bottom box (2) is provided with a bottom door bolt hole (22); the door bolt locking hole (73) and the bottom door bolt hole (22) are matched with the door bolt (5).

7. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The upper end surface of the long slide block (7) is provided with a sliding groove (72) which is of a structure of low in front and high in back; the bottom box (2) is provided with a ejector rod (9) and a conductive sheet (10), the ejector rod (9) is movably connected with the bottom box (2), the top of the ejector rod (9) is movably connected with the conductive sheet (10), the bottom of the ejector rod (9) is movably connected with the sliding groove (72) after penetrating through the bottom box (2), the conductive sheet (10) is movably connected with a coil and a terminal assembly (101), and the conductive sheet (10) is clamped on the door pin (5).

8. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The sidewall of the sliding frame (4) is provided with a slide rail (42) which is of a structure of high in front and low in back, the upper part of the side surface of the door pin (5) is provided with a convex arm (51) which is movably connected with the upper end surface of the slide rail (42).

9. The small-sized electromagnetic door lock device having a manual unlocking function according to claim 1, characterized in that: The cam (8) is rotatably installed on the cam seat (3) through a cam shaft (102), a torsion spring (103) is arranged in the inner cavity of the cam seat (3), one end of the torsion spring (103) is installed on the cam (8), and the other end is connected with the cam seat (3); the inner cavity of the bottom box (2) is installed with a coil, the inner cavity of the coil is movably connected with an iron core (104), the front end of the iron core (104) is clamped in the sliding frame (4); the inner cavity of the bottom box (2) is provided with a guide needle (105), one end of the guide needle (105) is movably inserted into the inner wall of the bottom box (2), and the other end is movably connected with the heart-shaped track structure (43) of the sliding frame (4); the upper part of the bottom box (2) is installed with an electric box upper cover (106), and the electric box upper cover (106) is clamped on the bottom box (2).

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