An electromagnetic shielding door with a concealed handle

Abstract

The utility model relates to electromagnetic shielding door hidden type handle technical field discloses a hidden handle's electromagnetic shielding door, including the door body, the inside of door body is provided with linkage mechanism, the outside of door body is provided with the unlocking feedback mechanism, the inside right side upper and lower end of door body all are fixedly connected with the connecting plate, the front end of connecting plate all is rotatively connected with direction controller no.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic shielded door concealed handle technology, and in particular to an electromagnetic shielded door with a concealed handle. Background Technology

[0002] Electromagnetic shielding doors are specialized doors that can effectively block electromagnetic waves from penetrating, prevent electromagnetic radiation leakage or external electromagnetic interference from intruding, thereby ensuring the safety of the electromagnetic environment in a specific space. Their core function is to achieve electromagnetic shielding effectiveness through a special structure. However, traditional electromagnetic shielding doors have the problem of complex structure, and exposed handles or locks affect the aesthetics and increase installation and maintenance costs. Therefore, electromagnetic shielding doors with concealed handles are needed to simplify the structure and make the overall door more concise.

[0003] Early electromagnetic shielded doors consisted of exposed handles, rigid locking rods, and metal shielding frames. The exposed handles were used for manual opening, the rigid locking rods were responsible for transmitting locking force to lock the door, and the metal shielding frames provided basic electromagnetic shielding. Because the exposed handles protruded from the door surface, they disrupted the overall integrity of the door and affected its aesthetics. To solve this problem, existing technology uses concealed handles embedded in the door, reducing space occupation and aesthetic impact. However, in actual use, the rigid locking rods of electromagnetic shielded doors can become stuck and delayed due to long-term force during frequent opening and closing operations, reducing operational flexibility and failing to meet user needs. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an electromagnetic shielded door with a concealed handle, which aims to improve the problem of jamming and delay caused by long-term stress when the rigid locking rod of the electromagnetic shielded door is frequently opened and closed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic shielded door with a concealed handle, comprising a door body, wherein a linkage mechanism is provided inside the door body and an unlocking feedback mechanism is provided on the outside of the door body;

[0006] The upper and lower ends of the right side of the door are fixedly connected to connecting plates. The front end of each connecting plate is rotatably connected to a first direction controller. The left side of the first direction controller at the bottom is rotatably connected to a first guide rod. The bottom right side of the front wall of the door is rotatably connected to a first hidden handle. The bottom end of the first guide rod is rotatably connected to the top right side of the first hidden handle. The right side of the first bottom direction controller is rotatably connected to a second guide rod. The middle right side of the inner wall of the door is rotatably connected to a second direction controller. The top end of the second guide rod is rotatably connected to the right side of the second direction controller. The left side of the second direction controller is rotatably connected to a third guide rod. The top end of the third guide rod is rotatably connected to the right side of the first top direction controller. Locking components are provided on the right side of the two first direction controllers. Unlocking components are provided on the left side of the second direction controller.

[0007] As a further description of the above technical solution:

[0008] The unlocking feedback mechanism includes a door frame, the front left side of which is rotatably connected to the door body. The upper and lower sides of the right side of the inner wall of the door frame are provided with grooves. The right side of the inside of each groove is fixedly connected with a second spring, and the left side of each second spring is fixedly connected with a ball bearing.

[0009] As a further description of the above technical solution:

[0010] The locking assembly includes two locking rods. The left sides of the two locking rods are rotatably connected to one side of the corresponding direction controller. Sliding shells are slidably connected to the upper and lower ends of the right side of the door. Connecting rods are rotatably connected to the left side of the inner walls of the two sliding shells. The right sides of the two locking rods are rotatably connected to the corresponding rotating rods. Guide grooves are provided on the opposite side of the front right walls of the two connecting plates. The rear ends of the two connecting rods are slidably connected to the inner walls of the corresponding guide grooves. Wedge-shaped locking blocks are slidably connected to the right side of the inner walls of the two sliding shells. Baffles are fixedly connected to the left side of the inner walls of the two sliding shells. The same spring is fixedly connected between adjacent baffles and corresponding wedge-shaped locking blocks.

[0011] As a further description of the above technical solution:

[0012] The unlocking assembly includes a guide rod four, the right end of which is rotatably connected to the bottom of the direction controller two. A hidden handle two is rotatably connected to the middle left rear end of the door body, and the left end of the guide rod four is rotatably connected to the rear right end of the hidden handle two.

[0013] As a further description of the above technical solution:

[0014] The upper and lower ends of the right side of the inner wall of the door frame are provided with slots, and the positions of the two slots correspond to the positions of the corresponding wedge-shaped lock blocks.

[0015] As a further description of the above technical solution:

[0016] The top right end of each of the two sliding shells is provided with a positioning groove, and the inner wall size of the two positioning grooves is matched with the outer wall size of the corresponding ball.

[0017] As a further description of the above technical solution:

[0018] Multiple fixing plates are fixedly connected to the rear side of the door, and the rear ends of the multiple fixing plates are fixedly connected to the same handrail.

[0019] As a further description of the above technical solution:

[0020] The rear ends and adjacent sides of the two wedge-shaped locking blocks are inclined surfaces, and hinges are fixedly connected to the upper and lower ends of the front left side of the door body. The door body is rotatably connected to the door frame through the hinges.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, when the shielding door needs to be opened and unlocked from the outside, the hidden handle one is pulled, and the direction controller one is rotated counterclockwise by the guide rod one. Then, the direction controller two is rotated counterclockwise by the guide rod two. Then, the top direction controller one is rotated clockwise by the guide rod three. The sliding shell drives the wedge-shaped lock block to slide through the locking rod and the connecting rod. The wedge-shaped lock block disengages from the slot. Through the synchronous linkage effect, the shielding door can be flexibly controlled to unlock without jamming or delay.

[0023] 2. In this utility model, during the unlocking process, the sliding shell moves linearly along the right side of the door body under the drive of the connecting rod, causing the wedge-shaped lock block to gradually disengage from the slot of the door frame. The outer wall of the ball contacts the right end of the sliding shell, and the second spring is in a compressed state. After the wedge-shaped lock block completely disengages from the slot, the positioning groove of the sliding shell aligns with the ball in the groove of the door frame. The second spring releases its elastic force, pushing the ball to pop out to the left and lock into the positioning groove. A sound is generated when they make contact, and the auditory feedback indicates that the unlocking has been completed. Attached Figure Description

[0024] Figure 1 A perspective view of an electromagnetically shielded door with a concealed handle as proposed in this utility model;

[0025] Figure 2 This is a front view of an electromagnetic shielded door with a concealed handle according to the present invention.

[0026] Figure 3 This is a rear view of an electromagnetically shielded door with a concealed handle, as proposed in this utility model.

[0027] Figure 4This is a cross-sectional view of the door structure of an electromagnetic shielded door with a concealed handle proposed in this utility model.

[0028] Figure 5 for Figure 4 Enlarged view of point A in the image;

[0029] Figure 6 This is a cross-sectional view of the sliding shell structure of an electromagnetic shielded door with a concealed handle, as proposed in this utility model.

[0030] Legend:

[0031] 1. Door body; 2. Linkage mechanism; 201. Connecting plate; 202. Direction controller one; 203. Guide rod one; 204. Hidden handle one; 205. Guide rod two; 206. Direction controller two; 207. Guide rod three; 208. Locking assembly; 2081. Locking rod; 2082. Guide groove; 2083. Connecting rod; 2084. Sliding shell; 2085. Wedge-shaped lock block; 2086. Baffle; 2087. Spring one; 209. Unlocking assembly; 2091. Guide rod four; 2092. Hidden handle two; 3. Unlocking feedback mechanism; 301. Door frame; 302. Groove; 303. Spring two; 304. Ball bearing; 4. Positioning groove; 5. Handrail; 6. Fixing plate; 7. Hinge; 8. Slot. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 4 , Figure 5 and Figure 6 The present invention provides an embodiment of an electromagnetic shielded door with a concealed handle, comprising a door body 1, the door body 1 performing basic electromagnetic shielding function, a linkage mechanism 2 being provided inside the door body 1, and an unlocking feedback mechanism 3 being provided on the outside of the door body 1.

[0034] Connecting plates 201 are fixedly connected to the upper and lower ends of the right side of the interior of door 1. The connecting plates 201 provide rotational shaft support for the first direction controller 202. The front end of the connecting plates 201 is rotatably connected to the first direction controller 202. The two first direction controllers 202 drive the upper and lower locking components 208 to move synchronously through the locking rods 2081. The left side of the bottom first direction controller 202 is rotatably connected to the first guide rod 203. The first guide rod 203 converts the pulling force of the hidden handle 204 into a downward pulling force on the bottom first direction controller 202, causing it to rotate counterclockwise. The bottom right side of the front wall of door 1 is rotatably connected to the first hidden handle 204. The first hidden handle 204 is the starting point for external unlocking. Pulling by hand drives the first guide rod 203. The bottom end of the first guide rod 203 is rotatably connected to the top right side of the hidden handle 204. The right side of the bottom first direction controller 202 is rotatably connected to the second guide rod 205. The second guide rod 205 is connected to the bottom first direction controller 202. Directional controller 1 202 and directional controller 2 206 convert the counterclockwise rotational force of the bottom directional controller 1 202 into an upward thrust. Directional controller 2 206 is rotatably connected to the middle right side of the inner wall of door 1. Directional controller 2 206 acts as an intermediate linkage hub, receiving and transmitting forces in both the vertical and horizontal directions. The top of guide rod 2 205 is rotatably connected to the right side of directional controller 2 206. Guide rod 3 207 is rotatably connected to the left side of directional controller 2 206. Guide rod 3 207 connects directional controller 2 206 and top directional controller 1 202, converting the counterclockwise rotational force of directional controller 2 206 into a downward pull force, causing the top directional controller 1 202 to rotate clockwise. The top of guide rod 3 207 is rotatably connected to the right side of top directional controller 1 202. Locking components 208 are provided on the right side of both directional controllers 1 202, and unlocking components 209 are provided on the left side of directional controller 2 206.

[0035] The locking assembly 208 includes two locking rods 2081. The locking rods 2081 transmit the rotational motion of the direction controller 202 to the connecting rods 2083. The left sides of the two locking rods 2081 are rotatably connected to one side of the corresponding direction controller 202. Sliding shells 2084 are slidably connected to the upper and lower ends of the right side of the door body 1. The sliding shells 2084 slide horizontally at the upper and lower ends of the right side of the door body 1. Connecting rods 2083 are rotatably connected to the left side of the inner walls of the two sliding shells 2084. When the connecting rods 2083 slide along the guide groove 2082, they convert the rotational motion of the locking rods 2081 into the linear motion of the sliding shells 2084. The right sides of the two locking rods 2081 are respectively... The two connecting plates 201 are connected to the corresponding rotating rods. The front right ends of the two connecting plates 201 are provided with guide grooves 2082 on opposite sides. The rear ends of the two connecting rods 2083 are slidably connected to the inner walls of the corresponding guide grooves 2082. The right side of the inner walls of the two sliding shells 2084 are slidably connected with wedge-shaped locking blocks 2085. The left side of the inner walls of the two sliding shells 2084 are fixedly connected with baffles 2086. The baffles 2086 provide support points for spring 2087. The same spring 2087 is fixedly connected between the adjacent baffles 2086 and the corresponding wedge-shaped locking blocks 2085. The spring 2087 provides a restoring force for the wedge-shaped locking blocks 2085.

[0036] The unlocking assembly 209 includes a guide rod 2091, which converts the pulling force of the hidden handle 2092 into a leftward pulling force on the direction controller 206, driving it to rotate clockwise. The right end of the guide rod 2091 is rotatably connected to the bottom of the direction controller 206. The hidden handle 2092 is rotatably connected to the middle of the left rear end of the door 1. The hidden handle 2092 serves as the starting point for internal unlocking, making it convenient for internal personnel to pull. The left end of the guide rod 2091 is rotatably connected to the rear right end of the hidden handle 2092.

[0037] The upper and lower ends of the right side of the inner wall of the door frame 301 are provided with slots 8. The positions of the two slots 8 correspond to the positions of the wedge-shaped lock blocks 2085 respectively, and the wedge-shaped lock blocks 2085 are engaged with the slots 8.

[0038] Specifically, when the shielded door needs to be unlocked from the outside, pulling the hidden handle 204 causes the guide rod 203 to move downwards, which in turn causes the direction controller 202 to rotate counterclockwise. This counterclockwise rotation of the direction controller 202 causes the guide rod 205 on the right to move upwards. The guide rod 205 then drives the direction controller 206 to rotate counterclockwise. The direction controller 206, in turn, pulls the top direction controller 202 downwards via the guide rod 207, causing it to rotate clockwise. At this time, the direction controllers 202 on both the upper and lower sides drive the corresponding connecting rods 2083 to rotate via the locking rod 2081. The connecting rods 2083 slide along the guide groove 2082 of the connecting plate 201, converting the rotational motion into the linear motion of the sliding shell 2084. The sliding shell 2084 drives the wedge-shaped locking block 2085 to slide, and the wedge-shaped locking block 2085... The inclined surface contacts the slot 8 of the door frame 301, pushing the wedge-shaped lock block 2085 to compress the spring 2087 and move it inward into the door body 1, causing it to disengage from the slot 8, thus unlocking the door. When unlocking from the inside, pulling the hidden handle 2092 moves the guide rod 2091 to the left, causing the direction controller 206 to rotate clockwise. The direction controller 206 pulls the top direction controller 202 to rotate counterclockwise via the guide rod 307, and at the same time, the bottom direction controller 202 rotates clockwise via the guide rod 205. The upper and lower locking rods 2081 synchronously drive the connecting rod 2083, causing the sliding shell 2084 to move the wedge-shaped lock block 2085 out of the slot 8, completing the unlocking. Through the synchronous linkage effect, the shielded door can be unlocked from the inside and outside, achieving flexible control, and the linkage unlocking will not have any jamming or delay.

[0039] Reference Figure 4 , Figure 5 and Figure 6 The unlocking feedback mechanism 3 includes a door frame 301. The front left side of the door frame 301 is rotatably connected to the door body 1. The upper and lower sides of the right side of the inner wall of the door frame 301 are provided with grooves 302. The grooves 302 are used to accommodate spring 303 and ball 304. Spring 303 is fixedly connected to the right side of the inside of the groove 302. Spring 303 releases its elastic force to push the ball 304 into the positioning groove 4. Ball 304 is fixedly connected to the left side of the two springs 303. When the positioning groove 4 is aligned, the ball 304 is inserted into the groove and makes a sound by colliding with the positioning groove 4, providing auditory feedback. The top right side of the two sliding shells 2084 is provided with positioning grooves 4. The inner wall size of the two positioning grooves 4 matches the outer wall size of the corresponding ball 304.

[0040] Specifically, during the unlocking process, the sliding shell 2084, driven by the connecting rod 2083, moves linearly along the right side of the door body 1, causing the wedge-shaped lock block 2085 to gradually disengage from the slot 8 of the door frame 301. At this time, the positioning groove 4 at the right end of the sliding shell 2084 moves synchronously with the sliding shell 2084, and the outer wall of the ball 304 contacts the right end of the sliding shell 2084. The second spring 303 is in a compressed state. As the sliding shell 2084 moves, when the wedge-shaped lock block 2085 completely disengages from the slot 8, the positioning groove 4 of the sliding shell 2084 aligns with the ball 304 in the groove 302 of the door frame 301. The second spring 303 releases its elastic force, pushing the ball 304 to pop out to the left and into the positioning groove 4. A sound is produced when they come into contact, and the unlocking is completed through auditory feedback.

[0041] Reference Figure 1 , Figure 2 and Figure 3 Multiple fixing plates 6 are fixedly connected to the rear side of the door body 1. The fixing plates 6 are used to connect the handrail 5 to the door body 1. The rear ends of the multiple fixing plates 6 are fixedly connected to the same handrail 5, which provides a gripping point when closing the door. The rear ends and adjacent sides of the two wedge-shaped locking blocks 2085 are inclined surfaces. The upper and lower ends of the front left side of the door body 1 are fixedly connected to hinges 7. The hinges 7 rotatably connect the door body 1 to the door frame 301, restricting the door body 1 to rotate only along a fixed axis, ensuring the stability of the opening and closing trajectory and avoiding deviation. The door body 1 is rotatably connected to the door frame 301 through the hinges 7.

[0042] Specifically, when closing the door 1, a person holds the handle 5 connected to the fixing plate 6 on the back of the door 1 and applies external force to push the door 1 to rotate around the hinge 7 on the left front side. As the door 1 gradually approaches the door frame 301, the inclined surfaces of the wedge-shaped locking blocks 2085 at the upper and lower ends on the right side contact the edge of the door frame 301, causing the door frame 301 to exert lateral pressure on the wedge-shaped locking blocks 2085, pushing the wedge-shaped locking blocks 2085 to slide inward into the sliding shell 2084, while simultaneously squeezing the spring 2087 inside the sliding shell 2084. The wedge-shaped locking blocks 2085 retract into the sliding shell 2084. When the door 1 is completely closed, the position of the wedge-shaped locking blocks 2085 is aligned with the slot 8 on the inner wall of the door frame 301. The spring 2087 generates a rebound thrust, pushing the wedge-shaped locking blocks 2085 to slide to the right along the sliding shell 2084 and engage in the slot 8.

[0043] Working principle: When the shielding door needs to be opened and unlocked from the outside, pulling the hidden handle 204 causes the guide rod 203 to move downwards, rotating the direction controller 202 counterclockwise. The counterclockwise rotation of the direction controller 202 causes the guide rod 205 on the right to move upwards, which in turn drives the direction controller 206 to rotate counterclockwise. The direction controller 206 then pulls the top direction controller 202 downwards via the guide rod 207, causing it to rotate clockwise. At this time, the upper and lower direction controllers 202, through the locking rod 2081, respectively drive the corresponding connecting rods 2083 to rotate. The connecting rods 2083 slide along the guide groove 2082 of the connecting plate 201, converting the rotational motion into the linear motion of the sliding shell 2084. The sliding shell 2084 then drives the wedge-shaped locking block 2085 to slide. When the wedge-shaped lock block 2085 is in contact with the slot 8 of the door frame 301 through its inclined surface, it pushes the wedge-shaped lock block 2085 to compress the spring 2087 and move it into the door body 1, disengaging from the slot 8 and unlocking the door. When unlocking from the inside, the hidden handle 2092 is pulled, which moves the guide rod 4 2091 to the left and drives the direction controller 206 to rotate clockwise. The direction controller 206 pulls the top direction controller 202 to rotate counterclockwise through the guide rod 3 207, and at the same time drives the bottom direction controller 202 to rotate clockwise through the guide rod 205. The upper and lower lock rods 2081 synchronously drive the connecting rod 2083, which causes the sliding shell 2084 to move the wedge-shaped lock block 2085 into the slot 8, completing the unlocking. Through the synchronous linkage effect, it can be flexibly controlled without jamming or delay.

[0044] During the unlocking process, the sliding shell 2084 moves linearly along the right side of the door body 1 under the drive of the connecting rod 2083, causing the wedge-shaped lock block 2085 to gradually disengage from the slot 8 of the door frame 301. At this time, the positioning groove 4 at the right end of the sliding shell 2084 moves synchronously with the sliding shell 2084, gradually approaching the ball 304 in the groove 302 of the inner wall of the door frame 301. The outer wall of the ball 304 contacts the right end of the sliding shell 2084, and the second spring 303 is in a compressed state. When the wedge-shaped lock block 2085 completely disengages from the slot 8 as the sliding shell 2084 moves, the positioning groove 4 of the sliding shell 2084 aligns with the ball 304 in the groove 302 of the door frame 301. The second spring 303 releases its elastic force, pushing the ball 304 to pop out to the left and lock into the positioning groove 4. When the two come into contact, a sound is produced, and the auditory feedback indicates that the door has been unlocked.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electromagnetically shielded door with a concealed handle, comprising a door body (1), characterized in that: The door body (1) is provided with a linkage mechanism (2) inside and an unlocking feedback mechanism (3) is provided on the outside of the door body (1). The upper and lower ends of the right side of the door body (1) are fixedly connected to connecting plates (201). The front end of each connecting plate (201) is rotatably connected to a direction controller (202). The left side of the bottom direction controller (202) is rotatably connected to a guide rod (203). The bottom right side of the front wall of the door body (1) is rotatably connected to a hidden handle (204). The bottom end of the guide rod (203) is rotatably connected to the top right side of the hidden handle (204). The right side of the bottom direction controller (202) is rotatably connected to a guide rod (205). A second direction controller (206) is rotatably connected to the middle right side of the inner wall of the door body (1). The top end of the second guide rod (205) is rotatably connected to the right side of the second direction controller (206). A third guide rod (207) is rotatably connected to the left side of the second direction controller (206). The top end of the third guide rod (207) is rotatably connected to the right side of the first direction controller (202) at the top. A locking component (208) is provided on the right side of the two first direction controllers (202). An unlocking component (209) is provided on the left side of the second direction controller (206).

2. The electromagnetic shielding door with a concealed handle according to claim 1, characterized in that: The unlocking feedback mechanism (3) includes a door frame (301). The front left side of the door frame (301) is rotatably connected to the door body (1). The upper and lower sides of the right side of the inner wall of the door frame (301) are provided with grooves (302). The right side of the inside of each groove (302) is fixedly connected with a second spring (303). The left side of each of the two second springs (303) is fixedly connected with a ball bearing (304).

3. The electromagnetic shielded door with a concealed handle according to claim 1, characterized in that: The locking assembly (208) includes two locking rods (2081). The left sides of the two locking rods (2081) are rotatably connected to one side of the corresponding direction controller (202). The upper and lower right sides of the door body (1) are slidably connected to sliding shells (2084). The left side of the inner wall of the two sliding shells (2084) is rotatably connected to connecting rods (2083). The right sides of the two locking rods (2081) are rotatably connected to the corresponding rotating rods. The right sides of the front walls of the two connecting plates (201) are connected to each other. Guide grooves (2082) are provided on the side away from each other. The rear ends of the two connecting rods (2083) are slidably connected to the inner walls of the corresponding guide grooves (2082). Wedge-shaped locking blocks (2085) are slidably connected to the right side of the inner walls of the two sliding shells (2084). Baffles (2086) are fixedly connected to the left side of the inner walls of the two sliding shells (2084). The same spring (2087) is fixedly connected between the adjacent baffles (2086) and the corresponding wedge-shaped locking blocks (2085).

4. The electromagnetic shielding door with a concealed handle according to claim 1, characterized in that: The unlocking assembly (209) includes a guide rod four (2091), the right end of which is rotatably connected to the bottom of the direction controller two (206), and a hidden handle two (2092) is rotatably connected to the middle left rear end of the door body (1), and the left end of the guide rod four (2091) is rotatably connected to the rear right end of the hidden handle two (2092).

5. The electromagnetic shielding door with a concealed handle according to claim 2, characterized in that: The upper and lower ends of the right side of the inner wall of the door frame (301) are provided with slots (8), and the positions of the two slots (8) correspond to the positions of the corresponding wedge-shaped lock blocks (2085).

6. The electromagnetic shielded door with a concealed handle according to claim 3, characterized in that: The top right end of each of the two sliding shells (2084) is provided with a positioning groove (4), and the inner wall size of the two positioning grooves (4) is matched with the outer wall size of the corresponding ball (304).

7. The electromagnetic shielded door with a concealed handle according to claim 1, characterized in that: The rear side of the door (1) is fixedly connected to a plurality of fixing pieces (6), and the rear ends of the plurality of fixing pieces (6) are fixedly connected to the same handrail (5).

8. The electromagnetic shielding door with a concealed handle according to claim 3, characterized in that: The rear ends and adjacent sides of the two wedge-shaped locking blocks (2085) are inclined surfaces. The upper and lower ends of the front left side of the door body (1) are fixedly connected with hinges (7). The door body (1) is rotatably connected to the door frame (301) through the hinges (7).

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