Ferromagnetic screwdriver bit

Abstract

The utility model provides a strong magnetic screwdriver bit which comprises a screwdriver bit body and a strong magnetic ring, and a tool bit is arranged at the lower end of the screwdriver bit body. The strong magnetic ring comprises a tubular shell and a magnetic ring fixed at the lower end of the tubular shell, and the magnetic ring is a permanent magnet; the strong magnetic ring sleeves the lower end of the bit body and can move up and down relative to the bit body, the magnetic ring surrounds the periphery of the bit, and a limiting buckle which is in limiting connection with the bit body is integrally arranged on the tubular shell. The strong magnetic screwdriver head structure is optimized in design, the vertical position of the strong magnetic ring can be adjusted in a self-adaptive mode when the strong magnetic screwdriver head structure is used, the strong magnetic screwdriver head structure is suitable for attraction of screws with different groove depths, the screwdriver head is strong in attraction force to the screws, the strong magnetic ring and the screwdriver head body are convenient to assemble, the service life is long, and the performance is stable. And the method has good practicability and generalizability.

Description

Technical Field

[0001] The utility model belongs to the technical field of screwdriver bits, and particularly relates to a strong magnetic screwdriver bit. Background Art

[0002] A screwdriver bit is a tool used to tighten screws, and is usually installed on a hand drill for use. Most screwdriver bits currently used are magnetic, so that the blade of the screwdriver bit is inserted into the groove of the screw head and absorbs the screw, thereby stabilizing the screw. There is no need to hold the screw with your hand when tightening the screw, which avoids cutting the skin when the screw rotates, and can improve work efficiency. However, the magnetism of the screwdriver bit made by magnetization is weak, and it cannot effectively absorb the screw, and there is a situation where the screw falls during use. In order to enhance the adsorption force of the screw by the screwdriver bit, there is a method in the prior art to fix a magnetic ring on the screwdriver bit. The strong magnetic force of the magnetic ring can effectively absorb the screw, and the use effect is significantly improved.

[0003] Patent document CN218364430U discloses a strong magnetic screwdriver bit tool, including a screwdriver bit body, a magnetic sleeve is sleeved on the side wall below the screwdriver bit body, a groove is opened at the bottom of the magnetic sleeve, a strong magnetic block is arranged in the groove, and two sets of machine screws are penetrated through the right side wall of the magnetic sleeve, and the magnetic sleeve is locked to the corresponding position of the screwdriver bit body by the machine screws. In this way, when adsorbing screws with different groove depths, it is necessary to loosen the machine screws, adjust the magnetic sleeve to the appropriate position, and then lock the machine screws. This operation of adjusting the position of the magnetic sleeve is troublesome, which affects work efficiency. Utility Model Content

[0004] In this regard, the utility model provides a strong magnetic screwdriver bit, the upper and lower positions of the strong magnetic ring on the screwdriver bit body can be adaptively adjusted when in use, and the screwdriver bit has a strong adsorption force on the screw, thereby ensuring the stability of the screw positioning.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a strong magnetic screwdriver bit, comprising a screwdriver bit body and a strong magnetic ring, wherein a cutter head is arranged at the lower end of the screwdriver bit body;

[0007] The strong magnetic ring comprises a tubular shell and a magnetic ring fixed at the lower end of the tubular shell, and the magnetic ring is a permanent magnet;

[0008] The strong magnetic ring is sleeved on the lower end of the bit body and can move up and down relative to the bit body. The magnetic ring surrounds the outer circumference of the cutter head. The tubular shell is integrally provided with a limit buckle connected with the bit body.

[0009] In some embodiments, a downward-facing abutment surface is provided on the bit body near the cutter head, a groove is formed on the surface of the bit body between the abutment surface and the cutter head, and the limit buckle cooperates with the groove.

[0010] In some embodiments, the inner circumferential edge of the upper end of the tubular shell is provided with a limit step protruding radially inward, the inner diameter of the limit step is smaller than the outer diameter of the tool bit, and a plurality of dividing grooves are provided at intervals along the circumferential direction at the limit step, forming the limit buckle between two adjacent dividing grooves, and the dividing groove is configured to allow the ribs on the side of the tool bit to pass through tightly when the strong magnetic ring is sleeved on the bit body.

[0011] In some embodiments, a stop platform is provided above the magnetic ring in the tubular shell, and the upper end of the magnetic ring abuts against the stop platform after being embedded in the tubular shell.

[0012] In some embodiments, the strong magnetic ring can move up and down on the bit body with an amplitude of 2-5 mm.

[0013] In some embodiments, an annular groove is provided on the outer periphery of the upper end of the bit body, and the cross-section of the annular groove is arc-shaped.

[0014] In some embodiments, the tubular shell is made of plastic.

[0015] The strong magnetic screwdriver bit of the utility model has the positive effects: in the strong magnetic screwdriver bit of the utility model, through the structural optimization design, the screws are effectively adsorbed by the magnetic ring, the stability of the screw positioning of the screwdriver bit is enhanced, the service life is long, and the use performance is stable; and the strong magnetic ring is not fixed on the screwdriver bit body, but can have an up and down movable stroke on the screwdriver bit body. When using the screwdriver bit to tighten the screw, the bit of the screwdriver bit is inserted into the groove of the screw head, the magnetic ring and the screw head are attracted to each other, and the up and down positions of the strong magnetic ring on the screwdriver bit body can be adaptively adjusted according to the different groove depths, so as to adapt to the tightness of screws with various groove depths, and the limit buckle plays a limiting role, which can prevent the strong magnetic ring from easily falling off from the screwdriver bit body, has good practicality, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the strong magnetic screwdriver bit in the utility model;

[0018] Figure 2 This is a cross-sectional view of the cutter head of the strong magnetic screwdriver bit of the utility model;

[0019] Figure 3 This is an exploded view of the strong magnetic screwdriver bit in the utility model;

[0020] Figure 4 It is a top view of the strong magnetic ring in the utility model.

[0021] The reference numerals shown in the figure are: 1-bit body; 11-cutter head; 111-rib; 12-stop surface; 13-groove; 14-annular groove; 2-strong magnetic ring; 20-limiting step; 21-tubular shell; 22-magnetic ring; 23-limiting buckle; 24-dividing groove; 25-stop platform. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In the present utility model, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] The strong magnetic screwdriver bit structure in the embodiment of the utility model is as follows Figures 1 to 4As shown, it includes a screwdriver bit body 1 and a strong magnetic ring 2. The lower end of the screwdriver bit body 1 is provided with a cutter head 11. When tightening a screw, the cutter head 11 is inserted into the groove of the screw head, and the ribs 111 on the side of the cutter head 11 engage with the inner edge of the groove to transmit torque.

[0026] The strong magnetic ring 2 includes a tubular shell 21 and a magnetic ring 22 fixed at the lower end of the tubular shell 21; the tubular shell 21 is made of plastic, and the magnetic ring 22 is a permanent magnet, which can generate a strong adsorption force on the screw, ensure the stability of the screw positioning, and ensure the service life and performance of the screw bit.

[0027] The strong magnetic ring 2 is sleeved on the lower end of the bit body 1 and can move up and down relative to the bit body 1. The magnetic ring 22 surrounds the outer periphery of the cutter head 11, and the tubular shell 21 is integrally provided with a limit buckle 23 which is limit-connected to the bit body 1. In the scheme of this embodiment, the strong magnetic ring 2 is not fixed on the bit body 1, but can have an up and down movable stroke on the bit body 1. When using the bit to tighten the screw, the cutter head 11 of the bit is inserted into the groove of the screw head, and the magnetic ring 22 is attracted to the screw head. According to the different groove depths, the upper and lower positions of the strong magnetic ring 2 on the bit body 1 can be adaptively adjusted, so as to adapt to the tightness of screws with various groove depths. The limit buckle 23 plays a limiting role, which can prevent the strong magnetic ring 2 from easily falling off from the bit body 1, and has good practicality.

[0028] like Figure 1 and Figure 2 As shown, a downward-facing abutment surface 12 is provided on the bit body 1 near the cutter head 11, and a groove 13 is formed on the surface of the bit body 1 between the abutment surface 12 and the cutter head 11. The limit buckle 23 extends into the groove 13 and cooperates with the groove 13, thereby limiting the upper and lower movable range of the strong magnetic ring 2 on the bit body 1.

[0029] Preferably, the up and down movable range of the strong magnetic ring 2 on the bit body 1 is set to 2-5mm, specifically set to 2mm, 3mm, 4mm, 5mm, etc. The up and down movable range of the strong magnetic ring 2 is reasonably set so that the strong magnetic bit can adapt to the screws with most groove depths on the market and has good compatibility.

[0030] In some embodiments, Figure 3 and Figure 4As shown, the inner circumference of the upper end of the tubular shell 21 is provided with a limiting step 20 protruding radially inward, the inner diameter of the limiting step 20 is smaller than the outer diameter of the cutter head 11, and a plurality of dividing grooves 24 are provided at intervals along the circumferential direction at the limiting step 20, and the limiting buckle 23 is formed between two adjacent dividing grooves 24, and the dividing groove 24 is configured to allow the ribs 111 on the side of the cutter head to pass through tightly when the strong magnetic ring 2 is sleeved on the screwdriver head body 1, that is, the width of the dividing groove 24 corresponds to the width of the rib 111 The degree is reasonably set, and specifically, the width of the dividing groove 24 is set to be slightly smaller than the width of the rib 111; when the strong magnetic ring 2 is sleeved on the bit body 1, the strong magnetic ring 2 is sleeved upward from the bottom end of the bit body 1, and the rib 111 on the tool head 11 passes through the dividing groove 24 during sleeve connection, and the rib 111 is set to pass through the dividing groove 24 in a tight fit, so that due to the interference between the rib 111 and the dividing groove 24, it is ensured that the strong magnetic ring 2 will not fall off easily when installed on the bit body 1.

[0031] like Figure 2 As shown, a stopper 25 is provided above the magnetic ring 22 in the tubular shell 21 , and the upper end of the magnetic ring 22 abuts against the stopper 25 after being embedded in the tubular shell 21 , so that the stopper 25 acts as a stopper and limiter when the magnetic ring 22 is installed in place.

[0032] like Figure 1 As shown, an annular groove 14 is provided on the outer periphery of the upper end of the bit body 1, and the cross section of the annular groove 14 is an arc shape. When the bit is installed on the hand electric drill, the annular groove 14 is engaged with the cam on the hand electric drill to achieve the positioning of the bit installation.

[0033] 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 changes or substitutions within the technical scope disclosed by the utility model, which 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 strong magnetic screwdriver bit, comprising a screwdriver bit body (1) and a strong magnetic ring (2), wherein a cutter head (11) is provided at the lower end of the screwdriver bit body (1); It is characterized in that The strong magnetic ring (2) comprises a tubular shell (21) and a magnetic ring (22) fixed at the lower end of the tubular shell (21), and the magnetic ring (22) is a permanent magnet; The strong magnetic ring (2) is sleeved on the lower end of the bit body (1) and can move up and down relative to the bit body (1); the magnetic ring (22) surrounds the outer circumference of the cutter head (11); and a limit buckle (23) is integrally provided on the tubular shell (21) and is connected to the bit body (1) for limiting position.

2. The strong magnetic screwdriver bit according to claim 1, characterized in that: The bit body (1) is provided with a downwardly facing abutting surface (12) at a position close to the cutter head (11), a groove (13) is formed on the surface of the bit body (1) between the abutting surface (12) and the cutter head (11), and the limiting buckle (23) cooperates with the groove (13).

3. The strong magnetic screwdriver bit according to claim 1, characterized in that: The inner circumference of the upper end of the tubular shell (21) is provided with a limiting step (20) protruding radially inward, the inner diameter of the limiting step (20) is smaller than the outer diameter of the cutter head (11), a plurality of dividing grooves (24) are provided at intervals along the circumferential direction at the limiting step (20), and the limiting buckle (23) is formed between two adjacent dividing grooves (24), and the dividing groove (24) is configured to allow the ribs (111) on the side of the cutter head to pass through tightly when the strong magnetic ring (2) is sleeved onto the screwdriver head body (1).

4. The strong magnetic screwdriver bit according to claim 1, characterized in that: A stopper (25) is provided above the magnetic ring (22) in the tubular shell (21); the upper end of the magnetic ring (22) abuts against the stopper (25) after the magnetic ring (22) is embedded in the tubular shell (21).

5. The strong magnetic screwdriver bit according to claim 1, characterized in that: The strong magnetic ring (2) has an upward and downward movement range of 2-5 mm on the screwdriver bit body (1).

6. The strong magnetic screwdriver bit according to claim 1, characterized in that: An annular groove (14) is provided on the outer periphery of the upper end of the bit body (1), and the cross section of the annular groove (14) is in the shape of an arc.

7. The strong magnetic screwdriver bit according to claim 1, characterized in that: The tubular shell (21) is made of plastic.

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