Locking device and method

Abstract

The present invention discloses a locking device and method for locking between a first body and a second body, comprising a lock body and a lock hook, wherein the lock hook is fixedly installed at the edge of the first body and comprises a main lock hook, and the lock body is hinged at the edge of the second body and comprises a rotatable movable block, on which a lock tongue, an unlocking slider and an elastic member are arranged, the unlocking slider is fixedly connected to the lock tongue and can drive the lock tongue to extend and retract by moving the slider, and the elastic member is connected to the lock tongue to make the lock tongue have a tendency to extend. As a complete set of independent mechanisms, the locking device avoids the use of long arm parts and low-rigidity connection structure design, has a compact structure, beautiful shape, clear and concise external interface, and is easy and quick to assemble. There is no need to adjust the preload after installation, and a safe and reliable preload can be obtained after the device is locked, which effectively prevents the undesirable phenomenon of deformation and locking of the device.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical equipment, and in particular relates to a locking device and method. Background Art

[0002] At present, the locking devices of electrical cabinet doors can be mainly divided into connecting rod multi-point locking devices and single-point locking devices according to the layout of their locking points. These locking devices are based on the purpose of safety, shielding, sealing, etc., so that the electrical cabinet door is locked after closing. Generally speaking, the connecting rod multi-point locking device has a complex mechanism and is more suitable for the rapid locking of large electrical cabinet doors. Small electrical cabinet doors do not need to use such complex devices. In some occasions, through reasonable and effective design, the single-point locking device can effectively replace the connecting rod multi-point locking device. Such connecting rod multi-point locking devices generally have the following problems during use:

[0003] This device is a non-independent mechanism, and some guide and limit accessories need to be pre-welded, assembled and retained on the door panel, which increases the requirements for the design and manufacture of the matching door panel and increases the difficulty of design and processing.

[0004] The device has too many internal structural parts, resulting in high assembly requirements and complex processes. Generally, after assembly, the angle and gap of the connection points need to be adjusted to achieve the purpose of adjusting the preload. When the device is used on an electrical cabinet door with a rubber strip shielding seal, the preload adjustment is often not well controlled, which will lead to overpressure of the preload, resulting in reduced life of the rubber strip or even pressure damage. It may also cause the electrical cabinet door shielding seal to be loose due to too loose preload.

[0005] The device has unavoidable inherent defects in its design. There are clearances between some of its structural parts. The multi-stage low-rigidity connections of components such as the long-arm connecting rod and the rotating arm will produce stress deformation. Often after product transportation or long-term use, the device may lose its expected locking performance. This device should not be used in products with clear vibration and shock requirements, such as those mounted on vehicles and ships. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a locking device for an electrical cabinet door, which can replace the single-point locking device of a connecting rod multi-point locking device. As a complete set of devices with a reasonable and compact internal structure, it has beautiful appearance, clear and concise external interface, easy installation, no need for adjustment, smooth opening and closing, safety and reliability, and is suitable for vibration and impact environments.

[0007] Another object of the present invention is to provide a locking method, by which the locking device can be quickly locked or unlocked.

[0008] The present invention is achieved through the following technical solutions:

[0009] A locking device, used for locking between a first body and a second body, characterized in that it includes a lock body and a lock hook, the lock hook is fixedly installed at the edge of the first body, and includes a main lock hook, the lock body is hinged at the edge of the second body, and includes a rotatable movable block, on which a lock tongue, an unlocking slider and an elastic member are arranged, the unlocking slider is fixedly connected to the lock tongue, and the lock tongue can be driven to extend and retract by toggling the slider, and the elastic member is connected to the lock tongue, and is used to make the lock tongue have a tendency to extend.

[0010] Furthermore, the lock hook also includes a secondary lock hook, the main lock hook is fixed on the outer side surface of the first main body, and the secondary lock hook is fixed on the side end surface of the first main body. The cross-section of the movable block is L-shaped, that is, it includes a first movable block unit and a second movable block unit, one side of the first movable block unit is hinged to the second main body, and the other side is fixedly connected to the second movable block unit, wherein the first movable block unit is provided with a guide engaging groove, and the secondary lock hook and the guide engaging groove can be engaged with each other.

[0011] Furthermore, the locking tongue, unlocking slider, elastic member and lock buckle are arranged on the second movable block unit, and a receiving groove is provided at the tail end of the locking tongue, and the receiving groove and the corner of the movable block together constitute a receiving space for the elastic member.

[0012] Furthermore, a limiting hole is provided on the outer wall of the second movable block unit, a slider protrusion is fixedly provided on the unlocking slider, the slider protrusion passes through the limiting hole and is fixedly connected to the locking tongue, and the slider can slide horizontally in the limiting hole.

[0013] Furthermore, a lock buckle is provided at the front end of the movable block, and the lock buckle extends inwardly at an angle, so that a gap is formed between the lock buckle and the lock tongue, which is used to guide the lock tongue to engage with the main lock hook.

[0014] Furthermore, the inner side of the lock buckle is stepped.

[0015] Furthermore, the lock body also includes a fixed block, which is fixed at the edge of the second main body, and the fixed block and the movable block are connected by a pin shaft.

[0016] The present invention also provides a locking method, comprising:

[0017] During the locking process, the movable block rotates toward the lock hook, the main lock hook inserts into the lock tongue and pushes the lock tongue backward to squeeze the elastic member, and finally the main lock hook and the lock tongue are buckled, the elastic member rebounds and then supports and prevents the lock tongue from popping out and disengaging, and the lock hook is completely embedded in the movable block;

[0018] During the unlocking process, the unlocking slider is pushed in the opposite direction of the locking, and the unlocking slider drives the lock tongue to move synchronously. After the unlocking slider is pushed into place, the lock tongue is disengaged from the main lock hook, and the unlocking slider is continued to be pushed to expand the moving block so that the lock tongue is completely disengaged from the main lock hook. The unlocking slider is continued to be pushed or the moving block is rotated and the moving block is fully expanded to complete the unlocking action.

[0019] Beneficial effects of the present invention:

[0020] The present invention provides a locking device for an electrical cabinet door. As a complete set of independent mechanisms, the locking device avoids the use of long arm parts and low-rigidity connection structure designs, and does not require pre-installation of complex guide and limit parts on the cabinet body, thereby reducing the difficulty of design and manufacturing. It has an exquisite and compact structure, beautiful appearance, clear and concise external interface, and is easy and quick to assemble. There is no need to adjust the preload force after installation. A safe and reliable preload force can be obtained after the device is locked, which effectively eliminates the undesirable phenomenon of deformation and locking of the device. It can be used to lock electrical cabinet doors that are mounted on vehicles and ships and have vibration and impact requirements.

[0021] In the case of locking relatively large electrical cabinet doors, the door frame can be cleverly designed to effectively enhance its rigidity, and then the device can be installed in a two-point layout or a multi-point layout to replace the connecting rod multi-point locking device to achieve a safer and more reliable locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the lock body and the lock hook of the present invention when they are not locked;

[0023] Figure 2 It is a schematic diagram of the structure of the lock body and the lock hook after being locked according to the present invention;

[0024] Figure 3 It is a structural schematic diagram of the locking tongue and the main lock hook of the present invention in a state of being locked;

[0025] Figure 4 It is a structural schematic diagram of the present invention in a state where the lock tongue and the main lock hook are not bitten;

[0026] Figure 5 It is a cross-sectional top view of the lock body and the lock hook of the present invention in an unlocked state;

[0027] Figure 6 It is a cross-sectional structural schematic diagram of the lock body and the lock hook of the present invention in a locked state;

[0028] Among them: 1. lock body; 11. fixed block; 12. pin shaft; 13. moving block; 14. lock tongue; 14-1. tongue; 15. unlocking slider; 15-1. slider protrusion; 16. elastic member; 17. lock buckle; 18. guide engaging groove; 2. lock hook; 21. main lock hook; 22. auxiliary lock hook; 23. L-shaped connecting rod; 3. door frame; 4. cabinet door. DETAILED DESCRIPTION

[0029] The preferred mechanism and motion realization method of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1-5 As shown, a locking device comprises a lock body 1 and a lock hook 2, wherein the lock body 1 is mounted on a door frame 3 of an electrical cabinet, and the lock hook 2 is mounted on a cabinet door 4 of the electrical cabinet.

[0031] The lock hook 2 is an integrated part, including a main lock hook 21 and a secondary lock hook 22, and the two ends of the main lock hook 21 and the secondary lock hook 22 are respectively connected by two L-shaped connecting rods 23. The L-shaped connecting rod 23 is arranged horizontally along the outer surface of the cabinet door 4, corresponding to the main lock hook 21 being installed vertically on the front of the cabinet door 4, and the secondary lock hook 22 being installed vertically on the side of the cabinet door 4.

[0032] Of course, the main lock hook 21 and the auxiliary lock hook 22 can also be connected by one L-shaped connecting rod 23. Using two L-shaped connecting rods 23 will make the structure of the lock hook 2 more solid and stable.

[0033] The main lock hook 21 is a rectangular structure, and the two ends of the rectangle are respectively connected to the L-shaped connecting rod 23; preferably, inclined surfaces are respectively provided on the facing lock surface and the back lock surface of the main lock hook 21, and the inclined surfaces facilitate the main lock hook 21 to slide between the lock buckle 17 and the lock tongue 14 of the moving block 13.

[0034] The thickness of the main lock hook 21 is smaller than the width of the connecting rod 23, so that when the lock hook 2 is installed on the door frame, a gap is formed with the door frame to facilitate the insertion of the tongue 14-1 at the front of the lock tongue 14.

[0035] The auxiliary lock hook 22 is installed on the side of the cabinet door 4, and plays a main role of guiding the locking during the locking process.

[0036] It is best to set a transition slope on the outer side of the corner of the L-shaped connecting rod 23 to facilitate the lock body 1 to move toward the lock hook 2 more smoothly and unobstructed.

[0037] The lock body 1 comprises a fixed block 11 and a movable block 13, wherein the fixed block 11 and the movable block 13 are connected via a pin shaft 12; a screw hole is arranged on the fixed block 11, and the fixed block 11 is fixedly mounted on the door frame via screws.

[0038] The cross section of the movable block 13 is L-shaped, and the short side of the L-shape is connected to the pin 12 . The long side of the L-shape is provided with a locking tongue 14 , an unlocking slider 15 , an elastic member 16 and a lock catch 17 .

[0039] The lock buckle 17 is arranged at the front end of the long side of the L-shape. The lock buckle 17 extends obliquely inwards, and the inner side is stepped, which is used to guide the lock tongue 14 to engage with the main lock hook 21; the lock tongue 14 is arranged on the inner side of the movable block 13, and a tongue 14-1 is arranged at the front end of the lock tongue 14. There is a gap between the tongue 14-1 at the front end of the lock tongue 14 and the lock buckle 17, which is used to accommodate the main lock hook 21. The stepped teeth facilitate the main lock hook 21 to slide into the gap. The setting of the lock buckle 17 also plays an aesthetic role, so that the outer surface of the lock buckle 17 forms a whole.

[0040] A limiting hole is provided on the outer wall of the long side of the L-shaped movable block, a locking tongue 14 groove is provided in the middle of the locking tongue 14, and a slider protrusion 15-1 is correspondingly provided on the unlocking slider 15. The slider protrusion 15-1 passes through the limiting hole and the locking tongue 14 groove and is fixedly connected by screws. The slider protrusion 15-1 can slide horizontally in the limiting hole, so that when the slider is pushed to move on the outside of the movable block 13, the locking tongue 14 on the inside can move synchronously.

[0041] A receiving groove is provided at the rear end of the lock tongue 14, and the receiving groove and the L-shaped corner of the movable block 13 together constitute a receiving space for the elastic member 16. The elastic member 16 can be a spring, which is mainly used to rebound to the original position after the lock tongue 14 slides to the rear end. Multiple springs can be provided to increase the rebound force.

[0042] When the main lock hook 21 gradually enters the gap, it will squeeze the lock tongue 14 to move in the direction of the spring, which will give the spring an extrusion force. When the lock tongue 14 is engaged with the main lock hook 21, the spring will give the lock tongue 14 a forward thrust, so that the lock tongue 14 is reset, so that the lock tongue 14 can clamp the main lock hook 21.

[0043] In addition, grooves for accommodating the L-shaped connecting rod 23 of the lock hook 2 are respectively provided on the upper and lower sides of the lock tongue 14 , and a guide engaging groove 18 is provided on the short side of the L-shape, that is, a groove for the movable block 13 to accommodate the auxiliary lock hook 22 .

[0044] The locking action method of this embodiment is:

[0045] The cabinet door 4 of the electrical cabinet is pushed and closed, and the movable block 13 on the lock body 1 is turned around the pin shaft 12 to rotate toward the door frame 3 of the electrical cabinet. First, the guide engaging groove 18 on the movable block 13 is combined with the auxiliary lock hook 22. As the movable block 13 continues to rotate, after overcoming a very small damping force (if the door frame has a shielding sealing strip, the damping will be slightly increased), the lock tongue 14 contacts the main lock hook 21, and as the turning amplitude of the movable block 13 increases, the main lock hook 21 gradually slides into the gap between the tongue 14-1 at the front end of the lock tongue 14 and the lock buckle 17, the main lock hook 21 pushes the lock tongue 14, and the lock tongue 14 pushes the spring to move backward. When the lock body 1 is rotated into place, the lock tongue 14 is buckled with the main lock hook 21, and the lock hook 2 is completely embedded in the lock body 1. The elastic force of the elastic member 16 is effectively released and the lock tongue 14 is reset, and then it is supported and prevented from popping out and disengaging, thereby achieving the locking purpose and completing the locking action of the cabinet door 4 and the door frame 3 of the electrical cabinet.

[0046] The unlocking method of this embodiment is:

[0047] By moving the unlocking slider 15 on the lock body 1, the unlocking slider 15 drives the lock tongue 14 to move synchronously, and the moving direction is opposite to the locking direction (there is a shaped direction arrow on the surface of the unlocking slider 15). After the unlocking slider 15 is moved into place, the lock tongue 14 is disengaged from the main lock hook 21, and the unlocking slider 15 is continued to be moved to unfold the movable block 13, so that the lock tongue 14 is completely disengaged from the main lock hook 21. At this time, you can choose to continue to move the unlocking slider 15, or you can rotate the movable block 13 to make the movable block 13 overcome the very small damping force on the auxiliary lock hook 22 (the damping is increased when the door frame has a shielding sealing strip), and fully unfold the movable block 13, open the electrical cabinet, and complete the unlocking action.

[0048] The device is suitable for locking electrical cabinet doors and other fields with opening and closing locking requirements. The opening and closing locking forms are various, including left and right, up and down, front and back, etc.

[0049] Generally, only one set of this locking device is needed for the doors of small electrical cabinets to provide a safe and reliable locking effect. In the case of locking the doors of relatively large electrical cabinets, the rigidity of the cabinet door can be effectively improved in the structural design, and then the device can be installed in a two-point layout or a multi-point layout to achieve the expected locking purpose.

[0050] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A locking device for locking between a first body and a second body, characterized in that: The lock body comprises a lock hook, wherein the lock hook is fixedly installed at the edge of the first main body and comprises a main lock hook, and the lock body is hinged at the edge of the second main body and comprises a rotatable movable block, on which a lock tongue, an unlocking slider and an elastic member are arranged, the unlocking slider is fixedly connected to the lock tongue and can drive the lock tongue to extend and retract by toggling the slider, and the elastic member is connected to the lock tongue and is used to make the lock tongue have a tendency to extend; The lock hook also includes a secondary lock hook, the main lock hook is fixed to the outer side surface of the first body, the secondary lock hook is fixed to the side end surface of the first body, the cross section of the movable block is L-shaped, that is, it includes a first movable block unit and a second movable block unit, one side of the first movable block unit is hinged to the second body, and the other side is fixedly connected to the second movable block unit, wherein the first movable block unit is provided with a guide engaging groove, and the secondary lock hook and the guide engaging groove can be engaged with each other; A lock buckle is arranged at the front end of the movable block, and the lock buckle extends inwardly at an angle, so that a gap is formed between the lock buckle and the lock tongue, which is used to guide the lock tongue to engage with the main lock hook.

2. The locking device according to claim 1, characterized in that: The locking tongue, unlocking slider, elastic member and lock catch are arranged on the second movable block unit. A receiving groove is provided at the tail end of the locking tongue. The receiving groove and the corner of the movable block together constitute a receiving space for the elastic member.

3. The locking device according to claim 1, characterized in that: A limiting hole is provided on the outer wall of the second movable block unit, a slider protrusion is fixedly provided on the unlocking slider, the slider protrusion passes through the limiting hole and is fixedly connected to the locking tongue, and the slider can slide transversely in the limiting hole.

4. The locking device according to claim 1, characterized in that: The inner side of the lock buckle is stepped.

5. The locking device according to claim 1, characterized in that: The lock body further comprises a fixed block, which is fixed at the edge of the second main body, and the fixed block and the movable block are connected via a pin shaft.

6. A locking method, characterized in that: comprising a locking device as claimed in any one of claims 1 to 5, During the locking process, the movable block rotates toward the lock hook, the main lock hook inserts into the lock tongue and pushes the lock tongue backward to squeeze the elastic member, and finally the main lock hook and the lock tongue are buckled, the elastic member rebounds and then supports and prevents the lock tongue from popping out and disengaging, and the lock hook is completely embedded in the movable block; During the unlocking process, the unlocking slider is pushed in the opposite direction of the locking, and the unlocking slider drives the lock tongue to move synchronously. After the unlocking slider is pushed into place, the lock tongue is disengaged from the main lock hook, and the unlocking slider is continued to be pushed to expand the moving block so that the lock tongue and the main lock hook are completely engaged.

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