Screwdriver for detecting magnetic switch

Abstract

A screwdriver for detecting a magnetic switch comprises a handle and a rod body. The handle comprises a handle body, a magnet groove, a locking groove, a magnetic ring, a bolt inserted into the magnetic ring and an annular protective sleeve. The locking groove is formed in the groove bottom of the magnet groove. The locking groove is provided with a threaded groove. The bolt comprises a bolt column, a first external thread arranged on the periphery of the bolt column, a bolt head and a second external thread arranged on the periphery of the bolt head. And the bolt column penetrates through the magnetic ring and is fixed in the locking groove. And the bolt head is used for pressing and fixing the magnetic ring in the magnet groove. An internal thread is arranged on the inner side of the annular protective sleeve and matched with the second external thread. The annular protective sleeve and the bolt are arranged in a locking mode. The screwdriver for detecting the magnetic switch is provided with the magnetic ring, the bolt and the annular protective sleeve, and the magnetic ring is protected while the magnetic force of the magnetic ring to the outside is kept.

Description

Technical Field

[0001] This utility model relates to the field of screwdrivers, and in particular to a screwdriver for detecting magnetic switches. Background Technology

[0002] In the maintenance and repair of modern electrical and electronic equipment, screwdrivers are commonly used to operate electrical components that need to be tightened or disassembled, such as terminals, switches, and sockets. When using a screwdriver on a winding machine, maintenance personnel need to test the magnetic switch on the winding machine. A magnetic switch typically consists of two metal springs. Under normal circumstances, there is a tiny gap between the two metal springs, and the magnetic switch is closed. When a magnet approaches the magnetic switch, the magnet's magnetic field passes through the magnetic switch and acts on the two springs, temporarily magnetizing them in the magnetic field, with one spring becoming the north pole and the other the south pole. When the magnetic field strength is strong enough, the two springs will overcome their elasticity and make contact, thus opening the magnetic switch. If the indicator light on the circuit containing the magnetic switch illuminates at this time, the magnetic switch is working properly; otherwise, it is not.

[0003] Existing screwdrivers use a built-in magnet at the end of the handle to test whether the magnetic switch is functioning properly. When using a screwdriver to install a winding machine, maintenance personnel do not need to carry an additional magnetic rod to test the magnetic switch on the winding machine; they only need to use the magnet at the end of the handle to contact the magnetic switch, causing the magnetic field of the magnet to react with the magnetic switch, thereby testing whether it is working properly.

[0004] However, the magnet at the end of existing screwdrivers is prone to friction with the outside world during the testing process, which gradually weakens its magnetism over long-term use and affects the testing results. At the same time, prolonged shaking or vibration during use, storage and transportation can easily cause the magnet to loosen. Utility Model Content

[0005] In view of this, the present invention provides a screwdriver for detecting magnetic switches to solve the above problems.

[0006] A screwdriver for detecting magnetic switches includes a handle and a shaft disposed below the handle. The handle includes a handle body, a magnet groove at the end of the handle body away from the shaft, a magnetic ring at the bottom of the magnet groove, a locking groove in the handle body, a bolt inserted into the magnetic ring, and an annular protective sleeve outside the bolt. The locking groove is located at the bottom of the magnet groove. The surface of the locking groove has a threaded groove. The bolt includes a bolt post, a first external thread on the outer periphery of the bolt post, a bolt head fixedly connected above the bolt post, and a second external thread on the outer periphery of the bolt head. The bolt post passes through the magnetic ring and is locked in place in the locking groove by the first external thread. The bolt head presses the magnetic ring into the magnet groove. The inner side of the annular protective sleeve has an internal thread. The internal thread mates with the second external thread to lock the annular protective sleeve to the bolt.

[0007] Furthermore, the screwdriver used for detecting the magnetic switch also includes an adapter head disposed below the shaft.

[0008] Furthermore, the handle body is provided with a finger groove on one side facing the rod, and the finger groove is recessed into the interior of the handle body, with its curvature matching the shape of the fingertip.

[0009] Furthermore, the bolts are made of plastic.

[0010] Furthermore, the annular protective sleeve uses plastic as the material.

[0011] Furthermore, the height of the magnetic ring is less than or equal to the height of the magnetic groove.

[0012] Furthermore, the diameter of the bolt post is smaller than the inner diameter of the magnetic ring.

[0013] Furthermore, the outer diameter of the annular protective sleeve is equal to the diameter of the end of the handle.

[0014] Compared to existing technologies, this utility model provides a screwdriver for detecting magnetic switches. The screwdriver, bolt, and annular protective sleeve are designed to enable the magnetic ring to detect the magnetic switch while preventing friction between the magnetic ring and external sources from weakening its magnetism. The locking groove is used to lock the bolt in place. The bolt presses the magnetic ring firmly into the magnetic groove, with the bolt head pressing against a portion of the magnetic ring. Because the bolt and annular protective sleeve are made of iron, the demagnetizing force on the magnetic ring is small, allowing the magnetic field of the magnetic ring, protected by the bolt head and annular protective sleeve, to pass through the bolt head and detect the magnetic switch. Attached Figure Description

[0015] Figure 1 This utility model provides a structural schematic diagram of a screwdriver used for detecting magnetic switches.

[0016] Figure 2 This is an exploded view of the screwdriver used for detecting the magnetic switch.

[0017] Figure 3 This is a cross-sectional view of the screwdriver used for detecting the magnetic switch.

[0018] Figure 4 for Figure 3 The screwdriver used for detecting the magnetic switch has an enlarged schematic diagram at point A. Detailed Implementation

[0019] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0020] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the present invention. It should be understood that the terms "front," "rear," "left," "right," "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0021] Please see Figures 1 to 4This is a structural schematic diagram of a screwdriver for detecting magnetic switches provided by this utility model. The screwdriver for detecting magnetic switches includes a handle 10, a shaft 20 disposed below the handle 10, and an adapter head 30 disposed below the shaft 20. It is conceivable that the screwdriver for detecting magnetic switches also includes other functional modules, such as anti-slip grooves, which are technologies known to those skilled in the art and will not be described in detail here.

[0022] The handle 10 includes a handle body 11, a magnet groove 12 disposed at the end of the handle body 11 away from the rod 20, a magnetic ring 13 disposed at the bottom of the magnet groove 12, a locking groove 14 disposed in the handle body 11, a bolt 15 inserted into the magnetic ring 13, and an annular protective sleeve 16 disposed outside the bolt 15.

[0023] The handle body 11 is designed to provide a grip for the operator to operate the adapter head 30. The handle body 11 is made of plastic. Plastic has advantages such as lightweight, low cost, simple processing, good vibration resistance, and corrosion resistance. Simultaneously, as an insulating material, plastic can effectively interrupt current conduction, preventing electric shock caused by contact with live parts during operation. It also isolates the magnetic ring 13 from external contact, preventing damage to the magnetic ring 13. A finger groove 111 is provided around the handle body 11 on the side facing the rod 20. The finger groove 111 is recessed into the handle body 11, and its curvature is designed to match the shape of the fingertip.

[0024] The magnetic slot 12 has a circular opening for mounting the magnetic ring 13. Because the magnetic slot 12 is located at the end of the handle body 11 away from the adapter head 30, the operator only needs to rotate their wrist to make the magnetic field of the magnetic ring 13 contact the magnetic switch for testing when inspecting the circuit.

[0025] The magnetic ring 13 is used to detect whether the magnetic switch is functioning properly by triggering the magnetic switch. The height of the magnetic ring 13 is less than or equal to the height of the magnet groove 12 to facilitate the installation of the annular protective sleeve 16.

[0026] The locking groove 14 is disposed at the bottom of the magnet groove 12 and is used to lock the bolt 15 in the locking groove 14. The surface of the locking groove 14 is provided with a threaded groove 141, which is used to cooperate with the bolt 15 for installation.

[0027] The bolt 15 includes a bolt post 151, a first external thread 152 disposed on the outer periphery of the bolt post 151, a bolt head 153 fixedly connected above the bolt post 151, and a second external thread 154 disposed on the outer periphery of the bolt head 153. The bolt 15 is locked in the locking groove 14 and the magnet groove 12, and presses the magnetic ring 13 into the magnet groove 12. The diameter of the bolt post 151 is smaller than the inner diameter of the magnetic ring 13 to avoid friction between the bolt post 151 and the inner side of the magnetic ring 13 when the bolt post 151 is installed on the first external thread 152, thereby preventing damage to the magnetic ring 13. The first external thread 152 is provided corresponding to the thread groove 141, so that the bolt post 151 passes through the magnetic ring 13 and is locked in place in the locking groove 141 by the first external thread 152. The diameter of the bolt head 153 is larger than the inner diameter of the magnetic ring 13, allowing the bolt head 153 to press and fix the magnetic ring 13 in the magnet groove 12. After tightening, the bolt head 153 protrudes above the magnet groove 12, serving to accommodate the annular protective sleeve 16. Because the bolt 15 is made of plastic, the plastic has a smaller impact on the magnetic field lines of the magnetic ring 13, resulting in a smaller demagnetizing force. This allows the magnetic field of the magnetic ring 13 overlapping with the bolt head 153 to pass through the bolt head 153, enabling the magnetic ring 13 to perform normal detection of the magnetic switch. The second external thread 154 is used to mate with the annular protective sleeve 16 for installation.

[0028] The outer diameter of the annular protective sleeve 16 is equal to the diameter of the end of the handle 10, and the inner diameter of the annular protective sleeve 16 is equal to the outer diameter of the bolt head 153. This allows the annular protective sleeve 16 to protect the magnetic ring 13 not covered by the bolt head 153, preventing the magnetic ring 13 from weakening due to friction with the outside environment. It also further presses down on the magnetic ring 13 to prevent it from falling off. The inner side of the annular protective sleeve 16 has an internal thread 161. The internal thread 161 mates with the second external thread 154 to lock the annular protective sleeve 16 and the bolt 15 together, thus mounting the annular protective sleeve 16 above the magnetic ring 13. The annular protective sleeve 16 is made of rubber. Since the bolt 15 is made of plastic, the plastic has a smaller impact on the magnetic field lines of the magnetic ring 13, resulting in a smaller demagnetizing force. This allows the magnetic field of the portion of the magnetic ring 13 overlapping with the annular protective sleeve 16 to pass through the annular protective sleeve 16, enabling normal detection of the magnetic switch.

[0029] The end of the rod body 20 is connected to the adapter head 30 and is operated by the operator holding the handle 10.

[0030] During installation, first place the magnetic ring 13 in the magnet groove 12. Then, press the bolt 15 into the center of the magnetic ring 13, and then tighten the bolt 15 until the bolt head 153 is firmly pressed against the magnetic ring 13. Next, align the center of the annular protective sleeve 16 with the bolt head 153, and tighten the annular protective sleeve 16 onto the outside of the bolt head 153 until the annular protective sleeve 16 is pressed firmly against the handle 10.

[0031] Compared with existing technologies, the screwdriver provided by this utility model for detecting magnetic switches is equipped with a locking groove 14, a bolt 15, and an annular protective sleeve 16. This allows the magnetic ring 13 to detect the magnetic switch while preventing the magnetic ring 13 from weakening due to friction with the outside environment. The locking groove 14 is used to lock the bolt 15 in the locking groove 14. The bolt 15 presses the magnetic ring 13 tightly in the magnet groove 12, and the bolt head 153 is pressed tightly above part of the magnetic ring 13. Because the bolt 15 and the annular protective sleeve 16 are made of plastic, the magnetic field lines of the magnetic ring 13 can pass freely, and the demagnetizing force on the magnetic ring 13 is small. This allows the magnetic field of the magnetic ring 13, protected by the bolt head 153 and the annular protective sleeve 16, to pass through the bolt head 153 and detect the magnetic switch.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A screwdriver for detecting a magnetic switch, characterized by: The screwdriver for detecting magnetic switch comprises a handle and a shank arranged below the handle, the handle comprises a handle body, a magnet slot arranged at the end of the handle body away from the shank, a magnetic ring arranged at the bottom of the magnet slot, a locking slot arranged in the handle body, a bolt arranged in the magnetic ring, and an annular protective sleeve arranged outside the bolt, the locking slot is arranged at the bottom of the magnet slot, the surface of the locking slot is provided with a thread groove, the bolt comprises a bolt column, a first external thread arranged at the outer periphery of the bolt column, a bolt head fixedly connected above the bolt column, and a second external thread arranged at the outer periphery of the bolt head, the bolt column passes through the magnetic ring, is locked and installed through the first external thread and the thread groove, is fixed in the locking slot, the bolt head tightly fixes the magnetic ring in the magnet slot, the inner side of the annular protective sleeve is provided with an internal thread, the internal thread is arranged in cooperation with the second external thread, so that the annular protective sleeve and the bolt are locked and arranged.

2. The screwdriver for detecting a magnetic switch according to claim 1, wherein: The screwdriver for detecting magnetic switch further comprises an adapter head arranged below the shank.

3. The screwdriver for detecting a magnetic switch according to claim 2, wherein: The handle body is annularly provided with a finger slot on the side facing the shank, the finger slot is recessed towards the inside of the handle body, and the curvature is arranged in cooperation with the shape of the finger pad.

4. The screwdriver for detecting a magnetic switch according to claim 1, wherein: The bolt uses plastic as the material.

5. The screwdriver for detecting a magnetic switch according to claim 1, wherein: The annular protective sleeve uses plastic as the material.

6. The screwdriver for detecting a magnetic switch according to claim 1, wherein: The height of the magnetic ring is less than or equal to the height of the magnet slot.

7. The screwdriver for detecting a magnetic switch according to claim 1, wherein: The diameter of the bolt column is less than the inner diameter of the magnetic ring.

8. The screwdriver for detecting a magnetic switch according to claim 1, wherein: The outer diameter of the annular protective sleeve is equal to the diameter of the end of the handle.

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