An anti-static safety lock for electric control cabinet

Abstract

The present invention provides an anti-static safety lock for an electric control cabinet, which can eliminate static electricity in the electric control cabinet when the cabinet door is opened, and can effectively prevent staff from being electrostatically shocked while working. The present invention includes a U-shaped handle made of insulating material, a pull rod made of insulating material, and a screw rod made of insulating material; the two ends of the handle are fixed to the cabinet door; the pull rod is arranged between the handle and the cabinet door, and the pull rod and the handle are connected by a first compression spring; one end of the screw rod is provided with a lock tongue perpendicular to the screw rod, and the other end of the screw rod passes through the cabinet door and the pull rod in sequence, and finally is movably and rotatably connected to the handle, and the screw rod and the pull rod are connected by a thread; the pull rod is also provided with a first contact made of metal, and the handle is also provided with a second contact made of metal; pulling the pull rod can make the first contact contact with the second contact; and the present invention also includes a wire and a ground wire; one end of the wire is connected to the cabinet door, and the other end of the wire is connected to the first contact; one end of the ground wire is connected to the second contact, and the other end of the ground wire is connected to the earth.

Description

Technical Field

[0001] The invention belongs to the field of power cabinet safety accessories, and in particular relates to an anti-static safety lock for an electric control cabinet. Background Art

[0002] After long-term use, the surfaces of the electrical components inside the power cabinet will be charged with static electricity. Most electrical components are connected to a ground wire to eliminate static electricity on the surface of the electrical components. However, due to their structural reasons or external environmental influences, some components may have some residual static electricity on their surface or inside. This may cause static electricity to shock workers during work, leading to some unnecessary accidents and affecting work safety. Summary of the Invention

[0003] In view of the above problems, the present invention provides an anti-static safety lock for an electric control cabinet, which can eliminate static electricity in the electric control cabinet when the cabinet door is opened, and can effectively prevent staff from being electrocuted by static electricity while working.

[0004] The present invention provides an anti-static safety lock for an electric control cabinet, comprising a U-shaped handle made of insulating material, a pull rod made of insulating material, and a screw rod made of insulating material; the two ends of the handle are fixed to the cabinet door; the pull rod is arranged between the handle and the cabinet door, and the pull rod and the handle are connected by a first compression spring; one end of the screw rod is provided with a lock tongue perpendicular to the screw rod, and the other end of the screw rod passes through the cabinet door and the pull rod in sequence, and is finally movably and rotatably connected to the handle, and the screw rod and the pull rod are connected by a thread;

[0005] The pull rod is also provided with a first contact made of metal, and the handle is also provided with a second contact made of metal; pulling the pull rod can make the first contact contact with the second contact, and at the same time can drive the screw to rotate so that the lock tongue stuck in the door frame rotates and disengages from the door frame;

[0006] It also includes a wire and a ground wire; one end of the wire is connected to the cabinet door, and the other end of the wire is connected to the first contact; one end of the ground wire is connected to the second contact, and the other end of the ground wire is connected to the earth.

[0007] As a further optimization of the present invention, the first contact includes a first hollow cylinder made of insulating material, a protrusion made of metal is provided in the first hollow cylinder, and the other end of the wire is connected to the protrusion; the second contact includes a second hollow cylinder made of insulating material, a second compression spring is provided in the second hollow cylinder, and a pressure plate made of metal is provided at the end of the second compression spring, and one end of the ground wire is connected to the pressure plate; when the pull rod is pulled, the first hollow cylinder is put on the second hollow cylinder, and at the same time the protrusion contacts and squeezes the pressure plate.

[0008] As a further optimization of the present invention, the first hollow cylinder is sleeved with the second hollow cylinder, and when the pull rod is pulled, the protrusion contacts and presses the pressure plate.

[0009] As a further optimization of the present invention, the first compression spring is sleeved on the first hollow cylinder and the second hollow cylinder.

[0010] The present invention provides an anti-static safety lock for an electric control cabinet. When working on the cabinet, the cabinet door must first be opened. To do so, a pull rod is pulled, which causes a first contact to contact a second contact, thereby conducting static electricity from the cabinet to the ground, thereby eliminating static electricity. At the same time, pulling the pull rod rotates the lead screw, which in turn rotates the lock tongue, thereby opening the cabinet door. When used within an electric control cabinet, the present invention eliminates static electricity simply by opening the cabinet door. When inspecting the cabinet, operators do not need to perform destaticization procedures, thus optimizing the maintenance personnel's procedures and improving work efficiency. It also prevents electric shock accidents caused by operators forgetting to perform destaticization procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic cross-sectional view of the safety lock embodiment 1 in a closed state;

[0012] Figure 2 yes Figure 1 A schematic cross-sectional view of the safety lock in an open state;

[0013] Figure 3 yes Figure 2 An enlarged schematic diagram of a first contact and a second contact portion is shown;

[0014] Figure 4 This is a schematic cross-sectional view of the safety lock embodiment 2 in a closed state;

[0015] Figure 5 yes Figure 4 An enlarged schematic diagram of a first contact and a second contact portion is shown;

[0016] Among them, the handle 100, the pull rod 200, the screw rod 300, the lock tongue 310, the first compression spring 400, the cabinet door 500, the door frame 600, the first contact 700, the first hollow cylinder 710, the protrusion 720, the second contact 800, the second hollow cylinder 810, the second compression spring 820, the pressure plate 830, and the wire 900. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to specific embodiments.

[0018] like Figure 1-3As shown, this embodiment includes a U-shaped handle 100 made of insulating material, a pull rod 200 made of insulating material, and a screw rod 300 made of insulating material. The two ends of the handle 100 are fixed to the cabinet door 500, and the pull rod 200 is arranged between the handle 100 and the cabinet door 500. The pull rod 200 and the handle 100 are connected by a first compression spring 400. It is best to provide two or three first compression springs 400, respectively, provided at the two ends of the pull rod 200 or at the two ends and the middle of the pull rod 200. This arrangement makes the force on the pull rod 200 more balanced.

[0019] One end of the screw rod 300 is provided with a lock tongue 310 perpendicular to the screw rod 300. The other end of the screw rod 300 passes through the cabinet door 500 and the pull rod 200 in sequence, and is ultimately rotatably connected to the handle 100. The screw rod 300 and the pull rod 200 are connected by a threaded connection. When the pull rod 200 is pulled so that it approaches the handle 100, that is, when the first compression spring 400 is compressed, the pull rod 200 can drive the screw rod 300 to rotate, causing the lock tongue 310 to rotate. The lock tongue 310 rotates from a state of being hooked on the door frame 600 to a state of being disengaged from the door frame 600, at which point the cabinet door 500 can be opened. When the first compression spring 400 is released from the compressed state, that is, when the pull rod 200 is separated from the handle 100, the pull rod 200 drives the screw rod 300 to rotate in the opposite direction, causing the lock tongue 310 to rotate back to a state of being hooked on the door frame 600, and the cabinet door 500 is now locked.

[0020] The pull rod 200 is also provided with a first metal contact 700, and the handle 100 is also provided with a second metal contact 800. The cabinet also includes a wire 900 and a ground wire. One end of the wire 900 is connected to the cabinet door 500, and the other end of the wire 900 is connected to the first contact 700. One end of the ground wire is connected to the second contact 800, and the other end of the ground wire is connected to the ground.

[0021] When the pull rod 200 is pulled, that is, when the pull rod 200 is pulled close to the handle 100, the first contact 700 and the second contact 800 can come into contact. At this time, through the action of the wire 900 and the ground wire, the static electricity on the cabinet can be conducted to the ground, thereby playing a role in eliminating static electricity.

[0022] Preferably, the first contact 700 includes a first hollow cylinder 710 made of insulating material, with a metal protrusion 720 disposed within the first hollow cylinder 710. The other end of the wire 900 is connected to the protrusion 720. The second contact 800 includes a second hollow cylinder 810 made of insulating material, with a second compression spring 820 disposed within the second hollow cylinder 810. The end of the second compression spring 820 is provided with a metal pressure plate 830, with one end of the ground wire connected to the pressure plate 830. When the pull rod 200 is pulled, the first hollow cylinder 710 is sheathed over the second hollow cylinder 810, and the protrusion 720 simultaneously contacts and presses the pressure plate 830.

[0023] The purpose of the above preferred embodiment is, on the one hand, to further improve the safety of this embodiment. The two conductive bodies, the protrusion 720 and the pressure plate 830, are respectively disposed within the first hollow cylinder 710 and the second hollow cylinder 810 of insulating material, so that the operator will not touch any conductive bodies when opening the door, thereby effectively improving the safety of the present invention. Of course, if safety is further improved, an insulating layer can be affixed or applied to the area where the handle 100 is mounted on the cabinet door 500 to prevent the back of the hand from accidentally touching the cabinet door 500 when the handle 100 is pulled open; or the two mounting posts of the handle 100 can be set longer to reserve sufficient distance between the handle 100 and the cabinet door 500 to prevent the back of the hand from touching the cabinet door 500 when the handle 100 is pulled open.

[0024] Another aspect of the above-mentioned preferred scheme can ensure that the first contact 700 and the second contact 800 can be in contact each time the pull rod 200 is pulled. After all, the spring has a certain flexibility. When the pull rod 200 is pulled, it is possible that the first contact 700 and the second contact 800 are misaligned and cannot be in contact, and ultimately the static electricity cannot be eliminated. Pulling the pull rod 200 can make the first hollow cylinder 710 and the second hollow cylinder 810 fit together, which can effectively avoid the occurrence of misalignment between the first contact 700 and the second contact 800.

[0025] The above preferred solution also has a beneficial effect in one aspect, namely, it can ensure the stability of the contact between the protrusion 720 and the pressure plate 830. Since the protrusion 720 can squeeze the pressure plate 830 to compress the second compression spring 820, this arrangement can well ensure the stability of the contact between the pressure plate 830 and the protrusion 720; not only that, the process of the protrusion 720 compressing the second compression spring 820 can also provide the operator with an operating feel, so that the operator can feel that the protrusion 720 is compressing the second compression spring 820, thereby making a judgment that the first contact 700 and the second contact 800 have been in contact.

[0026] Example 2

[0027] like Figure 4 、 Figure 5 As shown, this embodiment is a further optimization of the preferred scheme of embodiment 1, that is, the first hollow cylinder 710 or the second hollow cylinder 810 is lengthened so that it always maintains a socketed state. Of course, when the pull rod 200 is pulled, the protrusion 720 can contact and squeeze the pressure plate 830. When the pull rod 200 is released, the pull rod 200 is acted upon by the first compression spring 400, and the protrusion 720 can move away from the pressure plate 830.

[0028] Preferably, the first compression spring 400 can be directly sleeved onto the first hollow cylinder 710 and the second hollow cylinder 810 .

[0029] This embodiment not only has all the beneficial effects of the preferred solution of Example 1, but also maintains the first hollow cylinder 710 and the second hollow cylinder 810 in a sleeved state, thereby providing a good guide for the compression of the first compression spring 400. In addition, sleeved first compression spring 400 on first hollow cylinder 710 and second hollow cylinder 810 makes the structure of the present invention more compact, and prevents the first compression spring 400 from breaking and being lost during use, or being pulled off by someone, thereby increasing the durability and service life of the first compression spring 400.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An anti-static safety lock for an electric control cabinet, characterized in that: The invention comprises a U-shaped handle made of insulating material, a pull rod made of insulating material, and a screw rod made of insulating material; the two ends of the handle are fixed to the cabinet door; the pull rod is arranged between the handle and the cabinet door, and the pull rod and the handle are connected by a first compression spring; one end of the screw rod is provided with a lock tongue perpendicular to the screw rod, and the other end of the screw rod passes through the cabinet door and the pull rod in sequence, and is finally movably and rotatably connected to the handle, and the screw rod and the pull rod are connected by a thread; When working on the electric control cabinet, first open the cabinet door. To open the cabinet door, you need to pull the pull rod, which is also provided with a first metal contact and a second metal contact on the handle. Pulling the pull rod can make the first contact contact with the second contact, thereby conducting the static electricity on the electric control cabinet to the ground, thereby playing a role in eliminating static electricity. At the same time, it can drive the screw to rotate so that the lock tongue stuck in the door frame can be rotated and disengaged from the door frame. It also includes a wire and a ground wire; one end of the wire is connected to the cabinet door, and the other end of the wire is connected to the first contact; one end of the ground wire is connected to the second contact, and the other end of the ground wire is connected to the earth; The first compression spring is sleeved on the first hollow cylinder and the second hollow cylinder; The first contact includes a first hollow cylinder made of insulating material, a metal protrusion is provided in the first hollow cylinder, and the other end of the wire is connected to the protrusion; the second contact includes a second hollow cylinder made of insulating material, a second compression spring is provided in the second hollow cylinder, and a metal pressure plate is provided at the end of the second compression spring, and one end of the ground wire is connected to the pressure plate; when the pull rod is pulled, the first hollow cylinder is put on the second hollow cylinder, and at the same time the protrusion contacts and squeezes the pressure plate.

2. The anti-static safety lock for an electric control cabinet according to claim 1, characterized in that: The first hollow cylinder is sleeved with the second hollow cylinder, and when the pull rod is pulled, the protrusion contacts and presses the pressing plate.

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