Magnetism increasing magnetic sleeve structure and magnetism increasing tool

Abstract

The invention discloses a magnetism-increasing magnetic sleeve structure and a magnetism-increasing tool, and belongs to the technical field of tools, the magnetism-increasing magnetic sleeve structure comprises a magnet holder, magnetism-increasing magnets and an outer sleeve shell, the magnet holder is made of a non-magnetic conductive material, the outer sleeve shell is made of a magnetic conductive material, and the outer sleeve shell wraps the magnet holder embedded with the magnetism-increasing magnets; the magnetism increasing magnet is an axially magnetized magnet; the number of the magnetism increasing magnets is at least two, and the magnetic poles, facing the axis direction of the magnetic sleeve, of all the magnetism increasing magnets are the same. Compared with the prior art, magnetic induction lines are introduced to the end face of the screw through the outer sleeve shells at the two ends of the magnetism increasing magnet and the tool inserted into the outer sleeve shells, the end of the tool, the front ends of the outer sleeve shells and the end face of the screw have high magnetism, and the screw supporting effect is greatly improved. The magnetic circuit is changed and guided to almost completely guide the magnetism of the magnetism-increasing magnet to the position between the tip of the screwdriver head and the end face of the screw, the whole magnetic circuit is a closed low-magnetic-resistance loop, the magnetic leakage phenomenon is reduced, and the usage amount of the magnet can be reduced.

Description

Technical Field

[0001] The invention relates to a magnetizing magnetic sleeve structure and a magnetizing tool, belonging to the technical field of tools. Background Art

[0002] like Figures 1 to 3 As shown: In order to improve the stability of the screw relative to the bit under high-speed rotation, the following three methods are usually adopted in the prior art: Figure 1 As shown, an axially magnetized magnetic ring 3 is provided at the end of the bit 2 to achieve adsorption and fixation of the screw end face 11. The magnetic ring 3 is usually embedded in the end of a fixing sleeve 4. The fixing sleeve 4 is axially positioned with the bit 2, usually through the cooperation of an elastic clip 42 and a groove 21, to ensure the axial position of the magnetic ring 3 relative to the tip of the bit 3. The disadvantages of this structure are poor versatility, the need to machine grooves in specific positions on the bit, and the need for the fixing sleeve 4 to match the structure of the bit 3. In addition, due to the size limitations of the magnetic ring during machining and the presence of the fixing sleeve 4, the outer diameter of the end of the entire bit 2 is relatively large, making it inconvenient to use in small spaces.

[0003] like Figure 2 As shown: Figure 2 The fixing sleeve 4 is fixed to the axial position of the bit 2 by a threaded structure 41 or a structure similar to a threaded structure. The axial dimension of this fixing method is relatively small, but the disadvantage is that it has poor versatility and requires a special bit to match. It cannot be adapted to ordinary bits commonly found on the market. Therefore, the number of bits available is small and expensive, and the overall cost of use is relatively high.

[0004] above Figure 1 and Figure 2 The magnetic ring 3 is an axially magnetized magnet, fixed to the tip of the bit 2 by a specially designed fixing sleeve 4. Considering that the magnetic ring 3 is relatively brittle and has certain size limitations during processing, it cannot be too small. Moreover, it is often impacted by the screw end face 11. Therefore, its radial thickness cannot be made too thin. As a result, a magnetized structure with a larger outer diameter is formed at the tip of the bit 2. This larger magnetic attraction structure affects its use in small spaces or deep hole conditions.

[0005] like Figure 3 As shown, Figure 3 The magnetic piece 3a is adsorbed on the side of the screwdriver bit 3. There are usually at least two magnetic pieces 3a, which is equivalent to forming a radial magnetization structure on the side of the screwdriver bit 2. That is to say, the magnetic piece 3a adsorbs the screw 1 by magnetizing the screwdriver bit 3. Therefore, Figure 3 The end of the fixing sleeve 4 may not contact the end face 11 of the screw. Figure 1 、 Figure 2 The form of magnetic structure, Figure 3The structural magnetization form has slightly better versatility, but its disadvantages are that it is bulky, the magnetization capacity decreases with increasing distance, and there are requirements for the diameter and shape of the screwdriver bit. The advantage is that it can reduce costs by reducing the volume and number of magnetic sheets 3a.

[0006] Through the above three forms of magnetization structure, it can be seen that in the prior art, the magnetization sleeve structure has the problems of large outer diameter and high magnet cost (especially the above Figure 1 and Figure 2 It also has the disadvantages of being a single-use device (e.g., a single-use device) and lacks versatility. It is also difficult to control magnetic contamination in certain specific application scenarios. Summary of the Invention

[0007] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a magnetizing magnetic sleeve structure and a magnetizing tool, which mainly solve the technical problems of high cost and inconvenience in the prior art.

[0008] In order to achieve the above objectives, the present invention adopts the following technical solutions: The magnetizing magnetic sleeve structure includes a magnet holder, a magnetizing magnet and an outer shell. The magnet holder is made of non-magnetic material. The outer shell is made of a magnetic conductive material and is wrapped around the outside of a magnet holder inlaid with magnetizing magnets; The magnetizing magnet is an axially magnetized magnet; The magnetizing magnets have at least two poles, and all the magnetizing magnets have the same magnetic poles facing the axis of the magnetic sleeve.

[0009] Preferably, in the aforementioned magnetizing magnetic sleeve structure, the magnetizing magnet is adsorbed on the outer shell.

[0010] Preferably, the aforementioned magnetizing magnetic sleeve structure, when the magnetizing magnetic sleeve structure is sleeved on the tool, the magnetizing magnet is attracted to the sleeved tool; when the magnetizing magnetic sleeve structure is sleeved on the tool and the tool is connected to the tail of the screw, the end of the outer shell is used to contact the tail of the screw.

[0011] In order to improve the contact effect between the outer shell and the screw, the screw connection end of the outer shell is provided with an inwardly extending step, which is used to be adsorbed on the end face of the screw, and there is a gap between the step and the internal tool.

[0012] Furthermore, for ease of arrangement, a magnetizing magnet placement section having an outer diameter smaller than that of the magnet holder is provided at one end of the magnet holder, and the magnetizing magnet placement section is connected to the magnetizing magnet through a magnetizing magnet placement hole.

[0013] Preferably, the magnet holder or outer shell is further provided with a damping structure or a positioning structure for preventing the magnetizing magnetic sleeve structure from axially moving relative to the installed tool. The damping structure is preferably a damping ring.

[0014] The inner hole of the magnet holder is an inner hexagon or a circle that matches the cross section of the installed tool.

[0015] A magnetizing tool comprises a tool and any one of the aforementioned magnetizing magnetic sleeve structures sleeved on the tool, wherein the tool is a manual fastening tool or a power fastening tool accessory.

[0016] The beneficial effects achieved by the present invention are: Compared to the existing technology, the present invention "directs" magnetic flux lines to the screw end face through the outer shells at both ends of the magnetizing magnet and the tool inserted inside. This gives the tool end, the front end of the outer shell, and the screw end face strong magnetism, greatly improving the nail-holding effect. By changing and guiding the magnetic circuit, the present invention "directs" almost all of the magnetism of the magnetizing magnet to the space between the tip of the bit and the screw end face. The entire magnetic circuit is a closed low-magnetic resistance loop, reducing magnetic leakage. This is different from the existing technology that only uses the bit to guide the magnetic circuit for magnetic attraction, or uses a magnetic ring to directly contact the screw for magnetic attraction.

[0017] Since magnetic flux lines are preferentially transmitted along the magnetic conductive material, most of the magnetic flux lines of the magnetizing magnet will be transmitted to the end face of the screw, so that a smaller magnetizing magnet can achieve a better nail supporting effect, which can reduce the use of magnets and thus reduce production costs.

[0018] During the process of attracting and supporting nails, the magnetic attraction between the tip of the bit and the end face of the screw, combined with the magnetic attraction between the front end of the outer shell and the end face of the screw, can enhance the supporting effect by increasing the contact area with the end face of the screw. Because the magnetic flux lines are transmitted along the magnetic material, and the magnetic attraction force is almost proportional to the contact area, the transmission process loss is extremely small. This allows the ideal supporting effect to be achieved even if the magnetizing magnet is far away from the tip of the bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the first method of magnetizing the screwdriver bit in the prior art; Figure 2 This is the second method of magnetizing the screwdriver bit in the prior art; Figure 3 It is the second method of increasing the magnetism of the screwdriver bit in the existing technology. Figure 4 This is a cross-sectional view of the magnetizing sleeve structure of the present invention being sleeved on a screwdriver bit; Figure 5 This is an axial cross-sectional view of the magnetizing sleeve structure of the present invention sleeved on a screwdriver bit; Figure 6 is an exploded view of the present invention; Figure 7 Schematic diagram of the magnetic circuit of the present invention when the screw is not attracted; Figure 8Schematic diagram of the magnetic circuit of the present invention in the state of adsorbing screws; The meanings of the reference numerals in the figure are: 1-screw; 11-screw end face; 2-bit; 21-groove; 31-locating ring; 3-magnetic ring; 3a-magnetic sheet; 4-fixing sleeve; 41-threaded structure; 42-elastic buckle; 5-magnet fixing sleeve; 51-magnetizing magnet placement section; 52-magnetizing magnet placement hole; 6-magnetizing magnet; 7-outer shell; 71-step; 8-damping ring. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] like Figures 4 to 7 As shown: This embodiment discloses a magnetizing magnetic sleeve structure, comprising a magnet holder 5, a magnetizing magnet 6 and an outer shell 7. The magnet holder 5 is made of non-magnetic material and is used to fix the magnetizing magnet 6.

[0022] The outer shell 7 is made of a magnetic conductive material, and the outer shell 7 is wrapped around the outside of the magnet holder 5 inlaid with the magnetizing magnet 6. The magnetizing magnet 6 is an axially magnetized magnet, and there are at least two, and all the magnetizing magnets 6 have the same magnetic poles facing the axial direction of the magnetizing magnetic sleeve structure. It is best that the magnetizing magnets 6 are evenly distributed along the circumferential direction of the magnet holder 5, so that a uniform magnetic field can be formed around the tool inserted into the interior. The tools in this embodiment mainly include a screwdriver bit 2 and a hand-held tool, and of course other forms of screw disassembly and assembly tools. It should be noted that the tools matched with this embodiment need to be made of a magnetic conductive material, such as the more common iron screwdriver bit.

[0023] In practical applications, the outer diameter of the entire magnetizing magnetic sleeve structure needs to be minimized, so the thickness of the magnetizing magnet 6 will be relatively small. In actual manufacturing, the magnetizing magnet 6 is preferably attached to the inner wall of the outer shell 7. This has two advantages: first, it facilitates the assembly of the magnetizing magnet 6; second, it enhances magnetic conduction between the magnetizing magnet 6 and the outer shell 7.

[0024] When there is no tool inserted inside the magnetizing magnetic sleeve structure and no adsorption screw at the end, since all the magnetizing magnets 6 are covered by the outer outer shell 7, only a very small part of the magnetic flux lines of the magnetizing magnets 6 will affect the outside of the magnetic sleeve. The vast majority of the magnetic flux lines are transmitted through the inside of the outer shell 7 and will not generate a magnetic field to the outside. The advantage of this is that it reduces the magnetic pollution caused by the magnetic sleeve when it is not in use.

[0025] like Figure 7As shown in the figure: when only the tool is inserted into the interior of the magnetizing magnetic sleeve, and the end of the outer shell 7 (the end close to the screw) does not directly contact the tool inside, since the tool is made of magnetic conductive material and the outer side of the tool contacts the inner magnetic pole of the magnetizing magnet 6, both ends of the magnetizing magnet 6 have magnetic conductive material, but since the end of the outer shell 7 does not directly contact the tool inside, as shown in the figure: Figure 7 As shown at A in the figure, a "high magnetic resistance path" will be formed at this location.

[0026] When the screw fits the bit and the outer shell at the same time, the magnetic lines of force will preferentially choose to pass through the screw path with low magnetic resistance, forming a magnetic circuit. The outside world feels that the magnetic force attracts the screw; assuming that there is no gap at A, that is, there is direct contact between the end of the outer shell 7 and the internal tool, then the magnetic lines of force will choose the shortest path and will not choose to pass through the screw path, which will result in a very weak magnetic attraction to the screw, or even no magnetic attraction.

[0027] Therefore, the existence of the gap at A makes the screw the key to whether the magnetic highway between the outer shell 7 and the tool is smooth. Without the screw, the magnetic path is the internal closure between the outer shell 7 and the inner tool, which manifests as weak external magnetic force.

[0028] That is to say, when the bit absorbs the screw, Figure 8 As shown: Figure 8 The arrows in the figure represent the approximate distribution of magnetic flux lines in this state. When the magnetizing magnetic sleeve structure is sleeved onto the tool and the tool is connected to the tail of the screw, the end of the outer shell 7 is attracted to the screw end face 11. Since the screw end face 11 is made of a magnetically conductive material, the magnetic highway described above is conducted, and the magnetic flux lines form a complete loop through the outer shell 7, the screw end face 11, and the bit 2. The end of the bit 2 has a stronger magnetic field relative to the screw end face 11, which greatly enhances the magnetic attraction between the two, achieving a screw-supporting effect. On the other hand, a large magnetic field also exists between the screw end face 11 and the end of the outer shell 7. Unlike the contact situation at the tip of the bit, the screw end face 11 has a certain outer diameter and thickness. The contact between the screw end face 11 and the end of the outer shell 7 is a circular ring. This ensures that the screw 1 is attracted by the high-strength magnet while also having a strong straightening effect. Even under the high-speed rotation of the bit 2, the screw 1 is unlikely to deviate or fly away.

[0029] When the outer diameter of the screw end face 11 is relatively small, the outer edge of the screw end face 11 may not be able to contact the end of the outer shell 7. In order to improve the adaptability of this embodiment to screws of different sizes, the screw connection end of the outer shell 7 of this embodiment is provided with an inwardly extending step 71. The step 71 is used to be adsorbed on the screw end face 11. The inner diameter of the step 71 is larger than the outer diameter of the tool being sleeved. Therefore, the step is not in direct contact with the tool being sleeved inside, thereby avoiding direct contact causing a "short circuit" to the magnetic circuit at the screw end face 11.

[0030] In order to reduce the outer diameter of the magnetizing magnetic sleeve and reduce the amount of magnetizing magnet 6. Figure 6 As shown: Specifically during production, a magnetizing magnet placement section 51 with an outer diameter smaller than that of the magnet holder 5 is provided at one end of the magnet holder 5 , and the magnetizing magnet placement section 51 is connected to the magnetizing magnet 6 through the magnetizing magnet placement hole 52 .

[0031] The inner hole of the magnet holder 5 can be an inner hexagon or a circle that matches the cross-section of the installed tool, and the magnetizing magnet 6 is better when it is adsorbed on the plane of the outer surface of the tool. It should be noted that: in this embodiment, when the two ends of the magnetizing magnet 6 are simultaneously adsorbed on the outer shell 7 and the outer surface of the tool, the supporting effect is best. However, during use, since the magnetizing magnetic sleeve structure is assembled in the factory, it is relatively easy for the magnetizing magnet 6 to be adsorbed on the inner wall of the outer shell 7. However, when the internal tool is used, it is directly inserted into the magnetizing magnetic sleeve. Due to the influence of manufacturing precision, the probability of all the magnetizing magnets 6 being in complete and good contact with the inserted internal tool is relatively small. The tool is often adsorbed together with the magnetizing magnet 6 on one side, and there is a small gap with the magnetizing magnet 6 on the other side. However, even so, it does not affect the implementation effect of this embodiment.

[0032] For ease of use, the magnet holder 5 or outer shell 7 is also provided with a damping structure or positioning structure for preventing the magnetizing magnetic sleeve structure from axially moving relative to the installed tool. The damping structure is a damping ring 8, which can be fixed by the magnet holder 5. The damping ring 8 allows the magnetizing magnetic sleeve structure to slide on the outer surface of the tool. The axial limit between the two is not a form-locking connection as in the prior art ( Figure 1 and Figure 2 As shown in the figure, the versatility of the magnetizing sleeve structure can be improved. The damping ring 8 has a certain degree of elasticity. Due to the tolerance of the tool size, the inner hole of the magnetic sleeve must be made larger to achieve better versatility. The damping ring can better fix the position of the magnetic sleeve and prevent it from being thrown out.

[0033] When the bit 2 adsorbs the screw end face 11 but there is a small gap between the end of the outer shell 7 and the screw end face 11, it does not affect the actual use of the present invention.

[0034] This embodiment also discloses a magnetizing tool, comprising a tool and the aforementioned magnetizing sleeve structure sleeved on the tool. The tool mainly includes a screwdriver bit, an electric screwdriver, a manual screwdriver, and other forms of nail-supporting or nail-attracting structures.

[0035] Compared to the prior art, this embodiment uses the outer shell 7 at both ends of the magnetizing magnet 6 and the tool inserted therein to "direct" magnetic flux lines to the screw end face 11. This gives the tool end, the front end of the outer shell 7, and the screw end face 11 strong magnetism, greatly enhancing the nail-holding effect. This embodiment "directs" nearly all of the magnetism of the magnetizing magnet 6 between the tip of the bit and the screw end face 11 by changing and guiding the magnetic circuit. The entire magnetic circuit is a closed loop, which differs from the prior art methods of magnetic attraction only through the bit guiding the magnetic circuit, or by using a magnetic ring directly contacting the screw for magnetic attraction.

[0036] Since magnetic flux lines are preferentially transmitted along the magnetic conductive material, most of the magnetic flux lines of the magnetizing magnet 6 are transmitted to the screw end face 11, so that the magnetizing magnet 6 with a smaller volume can achieve a better supporting effect, which can reduce the use of magnets and thus reduce production costs.

[0037] During the nail attraction and support process, the magnetic attraction between the tip of the bit and the screw end face 11, combined with the magnetic attraction between the front end of the outer shell 7 and the screw end face 11, can enhance the nail support effect by increasing the contact area with the screw end face 11. Because the magnetic flux lines in this embodiment are transmitted along the magnetic conductive material, the transmission process loss is extremely small. Therefore, even if the magnetizing magnet 6 is far away from the tip of the bit 2, the nail support effect is only slightly weakened.

[0038] It should be noted that: according to the definition of magnetic flux lines, magnetic flux lines should be continuous, non-crossing curves, but this embodiment is based only on the principle of full disclosure, and does not strictly follow the rules for drawing magnetic flux lines. It only uses multiple continuous arrows or dotted lines to represent the distribution of magnetic flux lines at corresponding positions. The applicant believes that those skilled in the art can understand and implement this solution based on the magnetic flux lines drawing of this patent and the description of the embodiment. Secondly, this embodiment Figure 7 The magnetic circuit B in the embodiment does not actually exist, and this embodiment is only used to facilitate the description of the working principle of the present invention.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. The magnetizing sleeve structure is characterized by: It comprises a magnet holder (5), a magnetizing magnet (6) and an outer shell (7), wherein the magnet holder (5) is made of a non-magnetic material. The outer shell (7) is made of a magnetic conductive material, and the outer shell (7) is wrapped around the outside of the magnet holder (5) inlaid with the magnetizing magnet (6); The magnetizing magnet (6) is an axially magnetized magnet; There are at least two magnetizing magnets (6), and all of the magnetizing magnets (6) have the same magnetic pole facing the axis of the magnetic sleeve.

2. The magnetizing sleeve structure according to claim 1, characterized in that: The magnetizing magnet (6) is adsorbed on the outer shell (7).

3. The magnetizing sleeve structure according to claim 1 or 2, characterized in that: When the magnetizing magnetic sleeve structure is sleeved on a tool, the magnetizing magnet (6) is adsorbed on the sleeved tool.

4. The magnetizing sleeve structure according to claim 1 or 2, characterized in that: When the magnetizing magnetic sleeve structure is sleeved on a tool and the tool is connected to the tail of a screw, the end of the outer shell (7) is used to contact the tail of the screw.

5. The magnetizing sleeve structure according to claim 4, characterized in that: The screw connection end of the outer shell (7) is provided with an inwardly extending step (71), the step (71) being used to be adsorbed on the end face of the screw, and a gap is present between the step (71) and the internal tool.

6. The magnetizing sleeve structure according to claim 1 or 2, characterized in that: One end of the magnet holder (5) is provided with a magnetizing magnet placement section (51) having an outer diameter smaller than that of the magnet holder (5), and the magnetizing magnet placement section (51) is connected to the magnetizing magnet (6) via a magnetizing magnet placement hole (52).

7. The magnetizing sleeve structure according to claim 1 or 2, characterized in that: The magnet holder (5) or outer shell (7) is also provided with a damping structure or a positioning structure for preventing the magnetizing magnetic sleeve structure from axially moving relative to the installed tool.

8. The magnetizing sleeve structure according to claim 7, characterized in that: The damping structure is a damping ring (8).

9. The magnetizing sleeve structure according to claim 1 or 2, characterized in that: The inner hole of the magnet holder (5) is an inner hexagonal or circular shape that matches the cross-section of the installed tool.

10. A magnetizing tool, characterized in that: A magnetizing magnetic sleeve structure comprising a tool and any one of claims 1 to 9 which is sleeved on the tool, wherein the tool is a manual fastening tool or a power fastening tool accessory.

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