A universal key for low-voltage equipment cabinet lock and its manufacturing method

Abstract

This invention relates to the field of distribution cabinet technology, and more specifically to a universal key for low-voltage equipment cabinet locks and its manufacturing method. The universal key for low-voltage equipment cabinet locks of this invention includes a handle and a sleeve. One end of the handle is fixedly connected to the bottom of the sleeve. A central shaft and steel needles are telescopically installed inside the sleeve, with multiple steel needles arranged around the central shaft. The manufacturing method of the universal key for low-voltage equipment cabinet locks of this invention includes the following steps: S1: Prepare the handle, sleeve, and base respectively; S2: Install the central shaft; S3: Install the spring and steel needles; S4: Install the base. The universal key for low-voltage equipment cabinet locks of this invention can be adapted to all models of equipment cabinet door locks. While retaining the function of a sleeve wrench, it can also be used to tighten or loosen nuts, bolts, etc., eliminating the need to carry multiple handles, making it convenient for users to operate and improving work efficiency. The manufacturing method of the universal key for low-voltage equipment cabinet locks of this invention is used to prepare universal keys for low-voltage equipment cabinet locks.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, and more specifically to a universal key for low-voltage equipment cabinet locks and its manufacturing method. Background Technology

[0002] Low-voltage equipment cabinets are one of the common electrical devices in power supply systems. They are mainly used for power distribution and conversion, motor control, reactive power compensation, protection of personnel from electric shock (direct and indirect contact), and protection of equipment from external environmental influences. However, the door locks of low-voltage equipment cabinets that do not have anti-misoperation functions are only used to control the opening and closing of various cabinet doors. For ease of maintenance, they often adopt a through-lock design.

[0003] However, low-voltage equipment cabinets come in a variety of models and key styles, making it difficult to match cabinet locks with keys. Staff often need to carry multiple different types of keys, which is inconvenient and prone to loss. Forgetting to bring a key or carrying an incompatible key can cause work delays, reduce efficiency, and disrupt daily operations. Existing universal keys are essentially simple combinations of several different key types, resembling a Swiss Army knife stack, which is inconvenient to carry and cannot perfectly match all types of equipment cabinet locks. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects and shortcomings of the prior art and provide a universal key for low-voltage equipment cabinet locks. This universal key can be matched with different models of equipment cabinet door locks, and is portable and highly versatile.

[0005] The second objective of this invention is to provide a method for manufacturing a universal key for low-voltage equipment cabinet locks, used to prepare a universal key for low-voltage equipment cabinet locks.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A universal key for a low-voltage equipment cabinet lock includes a handle and a sleeve. One end of the handle is fixedly connected to the bottom of the sleeve. A central shaft and steel needles are telescopically installed inside the sleeve, with multiple steel needles arranged around the central shaft.

[0008] Furthermore, a base is fixed inside the bottom of the sleeve, and multiple steel needle mounting holes are opened on the base. The steel needles are installed in the steel needle mounting holes by means of spring extension and retraction.

[0009] Furthermore, the steel needle includes a steel needle body and a steel needle head connected to the end of the steel needle body. The outer diameter of the steel needle body is adapted to the inner diameter of the steel needle mounting hole, and the outer diameter of the steel needle head is larger than the inner diameter of the steel needle mounting hole. The first end of the steel needle body passes through the base and extends out of the steel needle mounting hole. A spring is sleeved on the outside of the steel needle body. One end of the spring is fixed to the base, and the other end of the spring is fixedly connected to the steel needle body.

[0010] Furthermore, the distance between the base and the bottom of the sleeve is 1cm, the diameter of the steel needle is 1.9mm, and the length of the steel needle extending out of the sleeve is 8mm.

[0011] Furthermore, a central shaft mounting hole is provided in the middle of the base, and the central shaft is telescopically installed in the central shaft mounting hole. A spring is provided inside the central shaft.

[0012] Furthermore, multiple steel needles are arranged in a sequential order from the inside out to form n concentric regular hexagons, forming a closely arranged central axis and n layers of steel needles, where n≥3. The first layer of steel needles is close to the outer wall of the central axis, and the nth layer of steel needles is close to the inner wall of the sleeve body.

[0013] Furthermore, the central shaft has a diameter of 3.5mm, a length shorter than that of the steel needle, and is made of hard plastic.

[0014] Furthermore, the handle includes a connecting rod with a through hole at one end and a handle that passes through the through hole, with the other end of the connecting rod fixedly connected to the bottom of the sleeve.

[0015] A method for manufacturing a universal key for a low-voltage equipment cabinet lock includes the following steps: S1: preparing a handle, a sleeve, and a base respectively; S2: installing a central shaft; S3: installing a spring and a steel pin; S4: installing the base.

[0016] Further, step S3, installing the spring and the steel needle, includes the following sub-steps: a: passing the steel needle through the base; b: welding one end of the spring to the outer wall of the steel needle; c: welding the other end of the spring to the base.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] This invention relates to a universal key for low-voltage equipment cabinet locks. By utilizing a spring, steel needles can elastically extend and retract under the action of a core hole. The densely packed steel needles form the plug of the universal key, arranged in a regular hexagonal array. This allows for perfect compatibility with all types of equipment cabinet door locks. While retaining the function of a socket wrench, it can also tighten or loosen nuts, bolts, etc., eliminating the need to carry multiple handles and solving the problems of numerous handle types, easy loss, and high operating costs. The handle is designed for single-handed grip and rotation, facilitating user operation and improving work efficiency. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of the universal key for the low-voltage equipment cabinet lock of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the universal key for low-voltage equipment cabinet lock of the present invention;

[0021] Figure 3 This is a schematic diagram of the steel needle structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the base of the present invention;

[0023] Figure 5 This is a schematic diagram of the equipment cabinet door lock that can be adapted to the universal key for low-voltage equipment cabinet locks of the present invention;

[0024] Wherein: 1: handle, 11: connecting rod, 12: handle, 2: sleeve, 3: steel needle, 31: steel needle body, 32: steel needle head, 4: base, 41: steel needle mounting hole, 42: central shaft mounting hole, 5: spring, 6: central shaft. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0026] like Figure 1 As shown, a universal key for a low-voltage equipment cabinet lock includes a handle and a sleeve. One end of the handle is fixedly connected to the bottom of the sleeve. A central shaft and steel needles are telescopically installed inside the sleeve, with multiple steel needles arranged around the central shaft.

[0027] The telescopically mounted central shaft and steel needle extend from the sleeve when there is no pressure and retract into the sleeve when pressure is applied. When this invention is inserted into the lock hole of a low-voltage equipment cabinet door lock, the central shaft and steel needle inside the sleeve abut against the core in the lock hole. The core applies pressure to the central shaft and steel needle, causing them to retract into the sleeve. This allows the invention to be compatible with various equipment cabinet door locks with different cores.

[0028] like Figure 2 As shown, a base is fixed inside the bottom of the sleeve, and multiple steel needle mounting holes are opened on the base. The steel needles are installed in the steel needle mounting holes by means of spring extension and retraction. Specifically, as shown... Figure 3 As shown, the steel needle includes a steel needle body and a steel needle head connected to the end of the steel needle body. The outer diameter of the steel needle body is adapted to the inner diameter of the steel needle mounting hole, and the outer diameter of the steel needle head is larger than the inner diameter of the steel needle mounting hole. The tip of the steel needle body passes through the base and extends out of the steel needle mounting hole. A spring is sleeved on the outside of the steel needle body, one end of the spring is fixed to the base, and the other end of the spring is fixedly connected to the steel needle body. In this embodiment, the distance between the base and the bottom of the sleeve is 1 cm, the diameter of the steel needle is 1.9 mm, and the length of the steel needle extending out of the sleeve is 8 mm.

[0029] The steel needle body and the steel needle head are integrally formed. The bottom of the steel needle body is equipped with a spring made of spring steel, which is durable and provides reliable elasticity for the steel needle. The steel needle mounting hole holds the steel needle head on the base, allowing the steel needle to extend and retract on the base. The 1cm distance between the base and the bottom of the sleeve is suitable for cores of different lengths. The steel needle extends 8mm out of the sleeve. The steel needle can extend out of the sleeve and retract into the sleeve, and can be matched with equipment cabinet door locks with different cores such as female lock holes and male lock holes. It is compatible with most models of equipment cabinet door locks.

[0030] like Figure 4 As shown, a central shaft mounting hole is provided in the center of the base. The central shaft is telescopically mounted in the central shaft mounting hole, and a spring is installed inside the central shaft. In this embodiment, the diameter of the central shaft is 3.5mm, its length is less than that of the steel needle, and it is made of hard plastic.

[0031] The spring provides the extension and retraction force for the intermediate shaft. Under the pressure of the core, the intermediate shaft can extend and retract on the base. A central shaft with a volume slightly larger than the steel needle is used in the middle to stabilize the surrounding steel needles and prevent the spring on the steel needle body from shifting or deforming during use.

[0032] like Figure 4 As shown, multiple steel needles are arranged in a sequence from the inside out to form n concentric regular hexagons, forming a closely arranged central axis and n layers of steel needles, where n≥3. The first layer of steel needles is close to the outer wall of the central axis, and the nth layer of steel needles is close to the inner wall of the sleeve body.

[0033] Each steel needle works independently without interfering with others. When it comes into contact with a core of a different shape, the core can push the steel needles in different positions toward the sleeve to fit various core shapes.

[0034] like Figure 1 and Figure 2 As shown, the handle includes a connecting rod with a through hole at one end and a handle passing through the through hole. The other end of the connecting rod is fixedly connected to the bottom of the sleeve. In this embodiment, the handle is 9cm long and 5mm in diameter.

[0035] The connecting rod and sleeve are integrally formed, and the handle is designed as a T-shaped structure, so that the invention can be held and rotated with one hand, which is convenient for users to operate with one hand and improves work efficiency.

[0036] A method for manufacturing a universal key for a low-voltage equipment cabinet lock includes the following steps:

[0037] S1: Prepare handle, sleeve and base separately: Open mold according to design drawings. Handle and sleeve are made of stainless steel by one-piece molding. Base is pre-set with central shaft mounting hole and steel needle mounting hole.

[0038] S2: Install the center shaft: Install the center shaft into the pre-machined center shaft mounting hole;

[0039] S3: Install the spring and steel pin:

[0040] a: Pass the steel needle through the base;

[0041] b: Weld one end of the spring to the outer wall of the steel needle;

[0042] c: Weld the other end of the spring to the base: The end of each welded steel needle corresponds to the pre-machined steel needle mounting hole;

[0043] S4: Mounting base: Install the base with the central shaft, spring and steel needle installed, 1cm from the bottom of the sleeve.

[0044] The working principle of this invention:

[0045] Insert the sleeve into the lock hole of the low-voltage equipment cabinet door lock. The central shaft and steel needle inside the sleeve elastically abut against the core in the lock hole. The core pushes the contacting central shaft and steel needle into the sleeve, and the central shaft and steel needle retract into the sleeve. The steel needle not in contact with the core adheres to the outer wall of the core. Turning the handle causes the sleeve to rotate via the connecting rod, which in turn rotates the steel needle. The steel needle adhering to the outer wall of the core rotates the core, thereby opening the equipment cabinet door lock. Because the central shaft and steel needle can extend and retract within the sleeve, it is suitable for applications such as... Figure 5 The various specifications of the hole cores shown can be used, including square hole cores, triangular hole cores, irregular-shaped hole cores, and hexagonal hole cores, all of which can be adapted to the universal key for the low-voltage equipment cabinet lock of this invention.

[0046] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0047] This invention relates to a universal key for low-voltage equipment cabinet locks. By utilizing a spring, steel needles can elastically extend and retract under the action of a core hole. The densely packed steel needles form the plug of the universal key, arranged in a regular hexagonal array. This allows for perfect compatibility with all types of equipment cabinet door locks. While retaining the function of a socket wrench, it can also tighten or loosen nuts, bolts, etc., eliminating the need to carry multiple handles and solving the problems of numerous handle types, easy loss, and high operating costs. The handle is designed for single-handed grip and rotation, facilitating user operation and improving work efficiency.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A universal key for a low-voltage equipment cabinet lock, characterized in that: It includes a handle and a sleeve. One end of the handle is fixedly connected to the bottom of the sleeve. A central shaft and steel needles are telescopically installed inside the sleeve, and multiple steel needles are arranged around the central shaft. Multiple steel needles are arranged in a sequence from the inside out to form n concentric regular hexagons, forming a closely arranged central axis and n layers of steel needles, where n≥3. The first layer of steel needles is close to the outer wall of the central axis, and the nth layer of steel needles is close to the inner wall of the sleeve body.

2. The universal key for a low-voltage equipment cabinet lock according to claim 1, characterized in that: A base is fixed inside the bottom of the sleeve, and multiple steel needle mounting holes are opened on the base. The steel needles are installed in the steel needle mounting holes by means of spring extension and retraction.

3. A universal key for a low-voltage equipment cabinet lock according to claim 2, characterized in that: The steel needle includes a steel needle body and a steel needle head connected to the end of the steel needle body. The outer diameter of the steel needle body is adapted to the inner diameter of the steel needle mounting hole, and the outer diameter of the steel needle head is larger than the inner diameter of the steel needle mounting hole. The head of the steel needle body passes through the base and extends out of the steel needle mounting hole. A spring is sleeved on the outside of the steel needle body. One end of the spring is fixed to the base, and the other end of the spring is fixedly connected to the steel needle body.

4. A universal key for a low-voltage equipment cabinet lock according to claim 2, characterized in that: The distance between the base and the bottom of the sleeve is 1cm, the diameter of the steel needle is 1.9mm, and the length of the steel needle extending out of the sleeve is 8mm.

5. A universal key for a low-voltage equipment cabinet lock according to claim 2, characterized in that: The base has a central shaft mounting hole in the middle, and the central shaft is telescopically installed in the central shaft mounting hole. A spring is installed inside the central shaft.

6. A universal key for a low-voltage equipment cabinet lock according to claim 1, characterized in that: The central shaft has a diameter of 3.5mm, a length shorter than that of a steel needle, and is made of hard plastic.

7. A universal key for a low-voltage equipment cabinet lock according to claim 1, characterized in that: The handle includes a connecting rod with a through hole at one end and a handle that passes through the through hole. The other end of the connecting rod is fixedly connected to the bottom of the sleeve.

8. A method for manufacturing a universal key for a low-voltage equipment cabinet lock as described in any one of claims 1 to 7, characterized in that: Includes the following steps: S1: Prepare the handle, sleeve, and base separately; S2: Install the center shaft; S3: Install the spring and steel pin; S4: Install the base.

9. A method for manufacturing a universal key for a low-voltage equipment cabinet lock according to claim 8, characterized in that: Step S3 involves installing the spring and steel pin, which includes the following sub-steps: a: Pass the steel needle through the base; b: Weld one end of the spring to the outer wall of the steel needle; c: Weld the other end of the spring to the base.

Images