Door lock mechanism for distribution box

Abstract

The utility model relates to the technical field of distribution boxes, in particular to a door lock mechanism for a distribution box, which comprises a box body and a door body, one side of the door body is hinged with the box body, the other side of the door body is connected with a locking component, the locking component is used for locking the door body and the box body, and the door lock mechanism further comprises a limiting component, the limiting assembly comprises a connecting arm and a limiting piece, a long-strip-shaped groove is formed in the limiting piece in the longitudinal direction of the limiting piece, one end of the connecting arm is rotationally assembled with the inner side wall of the door body, the other end of the connecting arm is provided with a sliding part facing the long-strip-shaped groove in a protruding mode, and the sliding part is assembled in the long-strip-shaped groove in a sliding mode. The hinge structure of the door body and the box body is protected, the stability and reliability of assembly of the door body and the box body are improved, potential safety hazards caused by accidental closing of the door body to operators are reduced, electronic components are convenient to overhaul, install or replace, the working efficiency is improved, and safer and more convenient working conditions are provided for the operators.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution boxes, in particular to a door lock mechanism for distribution boxes. Background Art

[0002] A distribution box is an electrical device used for the distribution, control, protection and measurement of electric energy. It is usually composed of a metal box, circuit breaker, contactor, relay, instrument, cable, door, box and door lock mechanism;

[0003] The use environment of the distribution box includes indoors and outdoors. Due to the harsh outdoor environment, such as humidity, high temperature, low temperature, etc., the outdoor distribution box requires a higher reliability level than the indoor distribution box environment. The door lock mechanism plays a key role in the locking reliability of the door body and the box body. If the door lock mechanism is abnormal, it will cause the door body to be not closed tightly, and the locking protection level of the door body and the box body is insufficient, resulting in the door body shaking easily during transportation, lifting, installation, and maintenance;

[0004] In the prior art, CN204732709U discloses an integrated power distribution cabinet, comprising a box body, a cabinet door hinged with the box body, and a door lock fixed on the cabinet door, wherein the door lock comprises a rotating shaft rotatably connected to the cabinet door, one end of the rotating shaft is connected with a lock tongue, and the other end is connected with a handle, the lock tongue comprises a main lock tongue, an upper lock tongue and a lower lock tongue, the main lock tongue is fixedly connected to the rotating shaft and a fixed point is formed at the fixed point, one end of the upper lock tongue and one end of the lower lock tongue are respectively hinged with the main lock tongue and the hinges are located at both sides of the fixed point, the other end of the upper lock tongue and the other end of the lower lock tongue are respectively slidably connected with the cabinet door and clamped with the box body, the upper and lower parts of the cabinet door are fully locked with the box body by the upper lock tongue and the lower lock tongue, so that the cabinet door and the box body are more tightly connected;

[0005] With respect to the above-mentioned related technologies, the inventors believe that the door lock mechanism in the prior art has the following defects: when the door body is in an open state, due to the large cross-sectional area of ​​the door body itself, the door body is prone to move when subjected to external forces, such as crosswinds outdoors. This movement will cause the door body to close uncontrollably, thereby hitting the box body, causing deformation of the door body or the box body. In severe cases, it will affect the tightness of the closure between the door body and the box body, increase the probability of the electronic components in the box body being affected by the external environment, such as dust, moisture, etc., thereby affecting the normal operation and service life of the electronic components; on the other hand, if the direction of the external force is opposite, that is, pushing the door body to continue to open, then the hinge structure between the door body and the box body will be overtraveled, resulting in damage to the hinge structure, affecting the normal opening and closing of the door body, and increasing the replacement cost; more seriously, when the staff needs to open the door body for inspection, installation or replacement of electronic components in the box body, if the door body is accidentally closed under the action of external force, this will not only interfere with the staff's operation, but also cause harm to the staff, such as pinching the fingers and body of the staff. Utility Model Content

[0006] In order to solve the problem that the existing door lock structure does not have a limiting function, so that there is room for further improvement and enhancement of the door lock mechanism in terms of safety, stability and reliability, the present application provides a door lock mechanism for a distribution box.

[0007] The utility model provides a door lock mechanism for a distribution box adopts the following technical solution:

[0008] A door lock mechanism for a distribution box includes a box body and a door body, one side of the door body is hinged to the box body, and the other side of the door body is connected to a locking assembly, and the locking assembly is used to lock the door body and the box body, and also includes a limit assembly, the limit assembly includes a connecting arm and a limit piece, the limit piece is provided with an elongated groove along its longitudinal direction, one end of the connecting arm is rotatably assembled with the inner side wall of the door body, and the other end of the connecting arm is provided with a sliding portion protruding toward the elongated groove, and the sliding portion is slidably assembled in the elongated groove.

[0009] Preferably, the limiting member is provided with a locking groove near the hinge of the box body, and the locking groove is staggered and connected with the long groove.

[0010] Preferably, an angle a is formed between the axis of the long groove and the axis of the locking groove, and the angle a=10°±2°.

[0011] Preferably, the connecting arm is arranged in a V-shape and its bending angle is an obtuse angle, and the bending opening of the connecting arm is arranged toward the inner wall of the box.

[0012] Preferably, the connecting arm has a raised portion on the downward side thereof.

[0013] Preferably, a groove is formed on an upward side of the connecting arm, and the groove is arranged corresponding to the raised portion.

[0014] Preferably, the connecting arm is located below the limiting member, and the sliding portion is provided at one end of the long groove and is provided with a supporting portion extending along its circumferential direction.

[0015] Preferably, the limiting assembly further comprises a mounting plate arranged in an L-shape, the side wall of the mounting plate is connected to the inner side wall of the door body, and the connecting arm is rotatably connected to the bottom wall of the mounting plate by a rotating shaft.

[0016] Preferably, the locking assembly includes a transmission shaft, a lock tongue and a lock rod. The transmission shaft is rotatably assembled with the door body and the inward end is connected to the lock tongue to form a rotation center. The lock tongue is used to engage with the inner wall of the box body. The lock rod is hinged to the lock tongue and is used to engage with the inner wall of the box body. When the lock tongue is engaged and locked with the box body, the extended line of the axis of the lock rod passes through the hinge of the lock rod and the rotation center of the lock tongue.

[0017] Preferably, the locking rod is cylindrical, and a guide portion is provided at one end of the locking rod away from the locking tongue.

[0018] The beneficial effects of the utility model are:

[0019] By providing a limit assembly, the sliding part abuts against the inner wall of the long groove to offset the external force and limit the opening of the door body, thereby protecting the hinge structure of the door body and the box body and avoiding overtravel damage of the hinge structure due to external force, thereby extending the life of the hinge structure, reducing the frequency of maintenance and replacement, and improving the stability and reliability of the assembly of the door body and the box body. Secondly, the positioning groove and the long groove are staggered, and the sliding part slides into the positioning groove and self-locks to ensure that the door body remains stable in the open state, reducing the safety hazards to the operator caused by accidental closing of the door body, avoiding deformation or damage of the door body due to excessive opening, thereby maintaining the appearance and structural stability of the distribution box, reducing the maintenance and replacement costs caused by damage, providing the operator with a larger working space, facilitating the inspection, installation or replacement of electronic components, improving work efficiency, and providing the operator with safer and more convenient working conditions.

[0020] By providing a locking assembly, multiple locking points act simultaneously to ensure that the door body and the box body fit tightly. Even if one of the locking points fails, the other locking points can still keep the door body locked, thereby improving the safety performance of electronic components in the distribution box. When locking, the locking flange protects the lock tongue and the lock rod to prevent the lock tongue and the lock rod from being corroded by the external environment, especially in a humid environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of the distribution box door in the embodiment of the present application in a closed state;

[0022] Figure 2 This is a front view of the distribution box door in the embodiment of the present application in an open state;

[0023] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 This is a three-dimensional diagram of the distribution box door in the embodiment of the present application in an open state;

[0025] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 yes Figure 4 A partial enlarged view of point C in the middle;

[0027] Figure 7is a three-dimensional diagram of a connecting arm in an embodiment of the present application;

[0028] Figure 8 is a front view of the connecting arm in an embodiment of the present application;

[0029] Fig. 9 is a three-dimensional diagram of a limiting member in an embodiment of the present application;

[0030] Fig.10 It is a top view of the limiting member in the embodiment of the present application.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. box body; 2. door body; 3. hinge structure; 4. locking assembly; 401. transmission shaft; 402. lock tongue; 4031. upper locking rod; 4032. lower locking rod; 4033. guide part; 404. shielding plate; 501. connecting arm; 5011. sliding part; 5012. raised part; 5013. groove; 5014. supporting part; 502. limiting member; 5021. long groove; 5022. locking groove; 503. mounting plate; 504. screw. DETAILED DESCRIPTION

[0032] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that each technical feature and the overall technical solution of the utility model can be understood intuitively and vividly, but it cannot be understood as a limitation on the protection scope of the utility model.

[0033] In the description of the present invention, if there is a description of orientation, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. When a feature is referred to as "set", "fixed", or "connected" to another feature, it can be directly set, fixed, or connected to the other feature, or it can be indirectly set, fixed, or connected to the other feature.

[0034] In the description of the present utility model, if the orientation description is involved, for example, the orientation or position relationship indicated by "horizontal", "longitudinal" or "vertical" is based on the attached description. Figure 1 In the orientation or position relationship shown, the X-axis represents the horizontal direction, the Y-axis represents the longitudinal direction, and the Z-axis represents the vertical direction.

[0035] In the description of the present utility model, if "several" is involved, it means one or more, if "multiple" is involved, it means more than two, if "greater than", "less than" or "exceed" is involved, it should be understood as not including the number itself, if "above", "below" or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In addition, unless otherwise defined, the technical terms and scientific terms used in the present invention have the same meanings as those generally understood by those skilled in the art. The terms used in the present invention are only for describing specific embodiments, not for limiting the present invention. It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0037] Example: Figure 1-10 As shown, a door lock mechanism for a distribution box includes a box body 1 and a door body 2, one side of the door body 2 is hinged to the box body 1, and the other side of the door body 2 is connected to a locking assembly 4, the locking assembly 4 is used to lock the door body 2 with the box body 1, and also includes a limiting assembly, the limiting assembly includes a connecting arm 501 and a limiting member 502, the limiting member 502 is provided with a long groove 5021 along its longitudinal direction, one end of the connecting arm 501 is rotatably assembled with the inner side wall of the door body 2, when the connecting rod is rotatably assembled with the door body 2, the axis of rotation is vertically arranged, the other end of the connecting arm 501 is protruded toward the long groove 5021 and is provided with a sliding portion 5011, the sliding portion 5011 is slidably assembled in the long groove 5021, it should be noted that when the sliding portion 5011 slides to abut against the long groove When the groove 5021 is close to a side wall of the hinge between the door body 2 and the box body 1, the hinge is still in a non-overtravel state. When the door body 2 is opened and closed, the sliding part 5011 is slidably assembled in the long groove 5021, which limits the door body 2. When the door body 2 is in an open state and is subjected to external force to continue to open the door body 2, the sliding part 5011 abuts against the inner wall of the long groove 5021 to offset the external force and limit the opening of the door body 2, thereby protecting the hinge structure 3 between the door body 2 and the box body 1, and can prevent the door body 2 from exceeding the safety range when opening, and avoid overtravel damage of the hinge structure 3 due to external force, thereby extending the life of the hinge structure 3, reducing the frequency of maintenance and replacement, and improving the stability and reliability of the assembly of the door body 2 and the box body 1.

[0038] It is worth mentioning that the door body 2 and the box body 1 are hinged to form a hinge structure 3 through hinges or hinges.

[0039] The door body 2 itself has a large cross-sectional area, so when the door body 2 is in an open state and is subjected to an external force, such as crosswind in areas such as outdoors, in the mountains or at the seaside, the door body 2 will be closed uncontrollably, thereby hitting the box body 1, causing deformation of the door body 2 or the box body 1. In severe cases, the tightness of the door body 2 and the box body 1 when closed is affected, and the probability of the electronic components in the box body 1 being affected by the external environment, such as dust, moisture, etc., is increased, thereby affecting the normal operation and service life of the electronic components. In order to solve the problem of abnormal closure of the door body 2 when subjected to an external force, a retaining member 502 is provided with a locking groove 5022 near the hinge of the box body 1. The locking groove 5022 and the long groove 5021 are staggered in the horizontal direction and are connected. When the door body 2 is opened to the maximum opening angle, the sliding portion 5011 slides into the locking groove 5022 along the long groove 5021. Since the locking groove 5022 and the long groove 5021 are staggered, the sliding portion 5011 After the part 5011 slides into the locking groove 5022, it is self-locking. When the door body 2 needs to be closed, the personnel need to manually move the slide back into the long groove 5021 before the door body 2 can be closed, ensuring that the door body 2 remains stable in the open state, reducing the safety hazards caused to the operator by accidental closing of the door body 2, especially in windy environments such as mountains or seaside. This is particularly important. Secondly, it helps to maintain the integrity of the door body 2 and avoid deformation or damage of the door body 2 due to excessive opening, thereby maintaining the appearance and structural stability of the distribution box and reducing the maintenance and replacement costs caused by damage. In the long run, this helps to reduce the overall operating cost of the distribution box. Moreover, it keeps the door body 2 in the appropriate position when open, providing the operator with a larger working space, facilitating maintenance, installation or replacement of electronic components, improving work efficiency, and providing the operator with safer and more convenient working conditions.

[0040] In terms of the specific structure of the staggered arrangement of the positioning groove 5022 and the long groove 5021, the axis of the long groove 5021 is parallel to the longitudinal bottom wall of the opening of the box body 1, and an angle a is formed between the axis of the long groove 5021 and the axis of the positioning groove 5022, and the angle a=10°±2°. Preferably, the angle a=10°.

[0041] In terms of the specific structure in which the locking groove 5022 and the long groove 5021 are connected, the locking groove 5022 is a straight groove, and the long groove 5021 is connected between the two centers of the locking groove 5022, so that after the sliding part 5011 slides into the locking groove 5022, there is a left and right sliding amount to avoid jamming. It is worth mentioning that the axial length of the long groove 5021 is L1, and the axial length of the locking groove 5022 is L2, L2 = (2% ~ 3%) × L1, and the groove width of the long groove 5021 is equal to the groove width of the locking groove 5022.

[0042] In order to optimize the force structure of the connecting arm 501, so that it is easier to slide into the locking groove 5022, and when subjected to external force, it can abut against the inner wall of the locking groove 5022 through the sliding portion 5011, so as to offset the force of the external force pushing the door body 2 to continue to open or close, and improve the stability of the opening angle of the door body 2, the connecting arm 501 is set in a V shape and its bending angle is an obtuse angle. The bending mouth of the connecting arm 501 is set toward the inner wall of the box body 1. The V-shaped connecting arm 501 design can be Providing more stable support, being able to disperse and withstand external forces more effectively, reducing the shaking of the door body 2, and ensuring that the door body 2 stays stably at the set opening angle, that is, the angle when the sliding part 5011 slides into the positioning groove 5022. Secondly, the connecting arm 501 adopts an obtuse angle design, which can better resist deformation and damage when the connecting arm 501 is subjected to external forces, so that the force is more evenly distributed on the contact surface between the sliding part 5011 and the positioning groove 5022, thereby improving the overall durability and service life of the connecting arm 501. It should be noted that the bending opening of the connecting arm 501 is the opening formed after the folding limiter 502 is bent into a V shape, that is, the obtuse angle opening formed.

[0043] With regard to the specific angle of the connecting arm 501 being V-shaped and having an obtuse bending angle, the bending angle is 170°±5°. By designing the bending angle of the connecting arm 501 and the misalignment angle of the locking groove 5022, the sliding portion 5011 can slide into the locking groove 5022 more easily, thereby supporting and phasing the door body 2. When subjected to external force, the connecting arm 501 can abut against the inner wall of the locking groove 5022 through the sliding portion 5011, effectively offsetting the external force and preventing the door body 2 from being accidentally closed or over-opened due to the external force, thereby improving the safety of the operator and the protection performance of the electrical equipment.

[0044] In order to improve the structural rigidity of the connecting arm 501, the downward side of the connecting arm 501 has a raised portion 5012, and the raised portion 5012 can increase the cross-sectional moment of inertia of the connecting arm 501, thereby improving the bending strength and rigidity of the connecting arm 501. When subjected to external force, it can better resist deformation and deflection, thereby ensuring that the connecting arm 501 remains stable when supporting the door body 2, and reducing the risk of failure and deformation due to insufficient strength of the connecting arm 501. Secondly, the raised portion 5012 can distribute the force more evenly on the connecting arm 501, thereby helping to reduce local stress concentration, improve the bearing capacity and fatigue resistance of the connecting arm 501, help to extend the service life of the connecting arm 501, and reduce damage and replacement frequency caused by external forces.

[0045] In order to ensure that the connecting arm 501 has a certain elastic deformation and buffering effect when subjected to force, a groove 5013 is provided on the upward side of the connecting arm 501, and the groove 5013 is arranged corresponding to the raised portion 5012. When subjected to external force, the groove 5013 of the connecting arm 501 can undergo a certain degree of elastic deformation, thereby absorbing and dispersing the external force, playing a buffering role, and further protecting the door body 2 and the cabinet body from damage. In extreme cases, such as strong external force impact, the groove 5013 can provide additional safety margin, and absorb energy through the deformation of the connecting arm 501 to prevent the limit member 502 from breaking, thereby avoiding accidents caused by debris injuring people due to the failure of the limit member 502 to break. Secondly, the groove 5013 has a certain elastic deformation, so that the connecting arm 501 can adapt to the slight displacement between the door body 2 and the cabinet body caused by temperature changes, vibrations or other factors, and maintain long-term stability and reliability.

[0046] Of course, in order to reduce the difficulty of processing the connecting arm 501 and improve the integrity of the connecting arm 501, the groove 5013 and the raised portion 5012 of the connecting arm 501 are integrally formed by stamping.

[0047] In order to reduce the contact area between the connecting arm 501 and the limit member 502 and reduce the friction resistance, the connecting arm 501 is located below the limit member 502, and the sliding portion 5011 is inserted through one end of the long groove 5021 and is provided with a support portion 5014 extending along its circumferential direction. The width of the support portion 5014 is 1.2 to 1.5 times the width of the long groove 5021. The connecting arm 501 is located below the limit member 502, so that the contact area is reduced, thereby reducing the friction resistance between the connecting arm 501 and the limit member 502, which helps to ensure the smoothness of the opening and closing of the door body 2, and the wear between the connecting arm 501 and the limit member 502 is also reduced accordingly. Secondly, the provision of the support portion 5014 helps to increase the stability of the connection between the connecting arm 501 and the limit member 502, prevents it from swinging or deflecting unnecessary during operation, and helps to ensure the accuracy and reliability of the operation. It should be noted that the long groove 5021 and the positioning groove 5022 are both connecting grooves that connect the connecting arm 501 vertically.

[0048] Furthermore, in order to reduce the friction resistance between the connecting arm 501 and the limiting member 502 and improve the sliding smoothness between the connecting arm 501 and the limiting member 502, a ball is rollingly assembled on a side of the supporting portion 5014 close to the limiting member 502, and a countersunk groove begins to be formed on a side of the limiting member 502 facing the supporting portion 5014. The countersunk groove is arranged corresponding to the long groove 5021 and the locking groove 5022. The countersunk groove is used to limit the sliding direction of the ball and improve the smoothness of the sliding assembly of the connecting arm 501 and the limiting member 502.

[0049] In terms of the specific structure of the rotational assembly of one end of the connecting arm 501 with the inner wall of the door body 2, through the setting of the mounting plate 503, the bottom wall of the mounting plate 503 provides avoidance for the rotation of the connecting arm 501, thereby avoiding interference between the connecting arm 501 and the inner wall of the door body 2 during rotation, thereby improving the smoothness of opening and closing of the door body 2. The limiting assembly also includes an L-shaped mounting plate 503, the side wall of the mounting plate 503 is connected to the inner wall of the door body 2, and the connecting arm 501 and the bottom wall of the mounting plate 503 are rotationally connected by a rotating shaft.

[0050] Specifically, the limit assembly also includes a screw 504, the tail of the screw 504 is threaded, and a smooth rod is arranged near the head. A through hole is opened on the bottom wall of the mounting plate 503, and a threaded hole is opened at one end of the connecting arm 501 and the mounting plate 503 for rotational assembly. The screw 504 is passed through the through hole and threadedly connected with the threaded hole. The smooth rod of the screw 504 is located in the through hole to form a rotating shaft. Of course, the outer diameter of the smooth rod of the screw 504 is smaller than the inner diameter of the through hole.

[0051] In terms of the specific structure of the locking assembly 4, the locking assembly 4 includes a transmission shaft 401, a lock tongue 402 and a locking rod. The transmission shaft 401 is rotatably assembled with the door body 2 and the inward end is connected to the lock tongue 402 to form a rotation center. The lock tongue 402 is used to engage with the inner wall of the box body 1. The locking rod is hinged to the lock tongue 402 and is used to engage with the inner wall of the box body 1. When the lock tongue 402 is engaged and locked with the box body 1, the extended line of the axis of the lock rod passes through the hinge of the lock rod and the rotation center of the lock tongue 402.

[0052] Specifically, the lock tongue 402 is arranged in a T shape, and the lock rod includes an upper lock rod 4031 and a lower lock rod 4032. The upper lock rod 4031 is hingedly assembled with the upper end of the lock tongue 402 and is used to be clamped with the inner top wall of the box body 1, and the lower lock rod 4032 is hingedly assembled with the lower end of the lock tongue 402 and is used to be clamped with the inner bottom wall of the box body 1. The locking assembly 4 also includes that the other end of the transmission shaft 401 is connected to a handle, and the outer side wall of the door body 2 is provided with a receiving groove, and the transmission shaft 4 01 is located at the bottom of the accommodating groove, and the handle is located in the accommodating groove. The handle includes a connecting rod and a force rod. One end of the connecting rod is hinged to the rotating shaft, and the other end is fixedly connected to the middle part of the force rod. A positioning hole is provided on the connecting rod, and a positioning block matching the positioning hole is fixedly connected to the bottom of the accommodating groove. One side of the accommodating groove is an opening, and a baffle plate 404 is hinged at the opening. The baffle plate 404 is located in the accommodating groove, and one side of the baffle plate 404 hinged to the accommodating groove is recessed inward to form a clearance groove for facilitating the flipping of the baffle plate 404.

[0053] Among them, the locking rod is set in a cylindrical shape, and a guide part 4033 is set at the end of the locking rod away from the lock tongue 402, and a locking flange is set at the opening of the box body 1. The guide part 4033 is set through the lock tongue 402, which is convenient for guiding the locking rod to abut against the locking flange. A plurality of locking points are set through the locking assembly 4. When the door body 2 is closed, multiple locking points act at the same time to ensure that the door body 2 is tightly fitted with the box body 1. Even if one of the locking points fails, the other locking points can still maintain the locking state of the door body 2, thereby improving the safety performance of electronic components in the distribution box, especially in a humid environment, the lock tongue 402 is prone to corrosion, resulting in a decrease in the locking force. Secondly, when locking, the locking flange protects the lock tongue 402 and the locking rod to prevent the lock tongue 402 and the locking rod from being corroded by the external environment.

[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A door lock mechanism for a distribution box, comprising a box body and a door body, one side of the door body is hinged to the box body, and the other side of the door body is connected to a locking assembly, the locking assembly is used to lock the door body and the box body, characterized in that: It also includes a limiting assembly, which includes a connecting arm and a limiting member, wherein the limiting member is provided with a long groove along its longitudinal direction, one end of the connecting arm is rotatably assembled with the inner wall of the door body, and the other end of the connecting arm is provided with a sliding portion protruding toward the long groove, and the sliding portion is slidably assembled in the long groove.

2. A door lock mechanism for a distribution box according to claim 1, characterized in that: The limiting member is provided with a locking groove near the hinge of the box body, and the locking groove is staggered and connected with the long groove.

3. A door lock mechanism for a distribution box according to claim 2, characterized in that: An included angle a is formed between the axis of the long groove and the axis of the locking groove, and the included angle a=10°±2°.

4. A door lock mechanism for a distribution box according to claim 1, characterized in that: The connecting arm is arranged in a V shape and its bending angle is an obtuse angle, and the bending opening of the connecting arm is arranged toward the inner wall of the box.

5. The door lock mechanism for a distribution box according to claim 1, characterized in that: The connecting arm has a raised portion on a downward side.

6. A door lock mechanism for a distribution box according to claim 5, characterized in that: A groove is formed on an upward side of the connecting arm, and the groove is arranged corresponding to the raised portion.

7. A door lock mechanism for a distribution box according to claim 2, characterized in that: The connecting arm is located below the limiting member, and the sliding portion is provided at one end of the long slot and is provided with a supporting portion extending along the circumference thereof.

8. The door lock mechanism for a distribution box according to claim 1, characterized in that: The limiting assembly also includes an L-shaped mounting plate, the side wall of the mounting plate is connected to the inner side wall of the door body, and the connecting arm is rotatably connected to the bottom wall of the mounting plate by a rotating shaft.

9. A door lock mechanism for a distribution box according to claim 1, characterized in that: The locking assembly includes a transmission shaft, a lock tongue and a lock rod. The transmission shaft is rotatably assembled with the door body and the inward end is connected to the lock tongue to form a rotation center. The lock tongue is used to engage with the inner wall of the box body. The lock rod is hinged to the lock tongue and is used to engage with the inner wall of the box body. When the lock tongue is engaged and locked with the box body, the extended axis of the lock rod passes through the hinge of the lock rod and the rotation center of the lock tongue.

10. A door lock mechanism for a distribution box according to claim 9, characterized in that: The locking rod is cylindrical, and a guide portion is arranged at one end of the locking rod away from the locking tongue.

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