TWI719793B - Magnetic sleeve - Google Patents

Abstract

A magnetic sleeve mainly includes a mounting hole enclosing a reference point as the center and provided with at least one engagement surface. Each engagement surface touches a periphery of the mounting hole at two points. When one engagement surface is formed on the mounting hole, a diameter of a magnet is same as a distance passing from the periphery of the mounting hole through the reference point to the engagement surface. When at least two engagement surfaces are formed on the mounting hole, a radius of the magnet is same as a distance passing from the reference point to the engagement surface. Thus, a periphery of the magnet and the engagement surface are came into tight contact and a space is formed between the magnet and the mounting hole. Hence, air in the mounting hole can be discharged outward through the space smoothly to thereby prevent the magnet from being broken caused by pressing during the installation. Meanwhile, the space is narrowed down to the minimum volume to thereby position the magnet stably.

Description

Magnetic sleeve

The invention relates to a sleeve design, especially a magnetic sleeve.

It is found that sleeves are commonly used in the assembly and disassembly of locking elements such as bolts, nuts, screws, etc. Whether it is building construction, automobile maintenance or furniture assembly, etc., sleeves are commonly used. However, in order to make the locking The locking operation of the element can be carried out quickly, while avoiding excessive shaking of the locking element during the locking process, and solving the problem that when the length of the locking element is long in the past, the user must assist in positioning the locking element by hand during the locking process Because of the lack of components, the industry has developed a magnetic sleeve 1 to use the magnetism of the magnetic sleeve 1 to assist in fixing the locking element.

1A and 1B, the conventional magnetic sleeve 1 includes a sleeve body 11, and a magnetic attraction member 12 arranged in the sleeve body 11; wherein, the sleeve body 11 includes a set of closing sections 111, an assembling section 112 opposite to the sleeve section 111, a locking hole 113 formed in the assembling section 112, and a connecting hole 113 connected with the locking hole 113 and corresponding to the size of the magnetic attraction member 12 Mounting hole 114; In view of the fact that the magnetic member 12 is sintered by powder compression molding, it has the characteristics of hard and brittle texture, if the magnetic member 12 is installed in the mounting hole 114 by direct extrusion, It is easy to cause the air in the mounting hole 114 to be unable to be discharged outward, so that the air in the mounting hole 114 is squeezed and a reaction force is generated to push the magnetic member 12, thereby causing the magnetic member 12 to be squeezed. Fragmentation occurs, therefore, usually a protective member 13 made of a softer material is additionally coated on the outside of the magnetic attraction member 12. At the same time, a plurality of grooves 131 are formed on the periphery of the protective member 13 so that the magnetic attraction member 12 is installed In the process, the air in the mounting hole 114 can be discharged through the grooves 131 without squeezing the magnetic attraction member 12. However, the provision of the protective member 13 not only increases the additional cost, in addition, the magnetic The suction member 12 must be installed in the protective member 13 before subsequent installation operations can be carried out, and the overall processing flow is increased, which is not economical.

In view of this, another industry has developed a magnetic sleeve 2. As shown in FIG. 2A and FIG. 2B, the magnetic sleeve 2 includes a sleeve body 21 and a magnetic attraction member arranged in the sleeve body 21 22; wherein the sleeve body 21 includes a sleeve section 211, an assembly section 212 opposite to the sleeve section 211, a locking hole 213 formed in the assembly section 212, and a lock The mounting hole 214 is connected with the hole 213, and the aforementioned mounting hole 214 is composed of six abutting surfaces 2141. In addition, each abutting surface 2141 extends in a tangential direction along the periphery of the magnetic attraction member 22 and is connected to The adjacent top abutting surfaces 2141 are connected so that when the magnetic attraction member 22 is installed in the mounting hole 214, the magnetic attraction member 22 is caught by the abutting surfaces 2141 and creates a gap with the mounting hole 214. The air in the mounting hole 214 is discharged to the outside.

However, after actual use, it is found that the top surface 2141 of the mounting hole 214 needs to be precisely matched with the magnetic member 22 so that the magnetic member 22 is precisely restricted by the top surface 2141. However, the mounting hole The six abutting surfaces 2141 on the 214 are directly stamped and formed, which is likely to produce slight dimensional changes during the stamping and forming process. In addition, the dimensional tolerance of the magnetic member 22 causes the magnetic member 22 to be installed in When the top surface 2141 cannot be caught, so that the magnetic member 22 cannot be fixed in a stable position and loosened. If the size of the magnetic member 22 is increased, the size of the magnetic member 22 is slightly larger than The size of the mounting hole 214 is such that the magnetic attraction member 22 is tightly pressed by the abutting surfaces 2141. During the installation process of the magnetic attraction member 22, the abutting surfaces 2141 are likely to be in excessive contact and wear the magnetic member 22. The suction member 22. Furthermore, the gap formed between the magnetic suction member 22 and the top surface 2141 of the mounting hole 214 after installation is too large, causing the magnetic suction member 22 to contact the external air in a large area and accelerate oxidation, not only As a result, the magnetism of the magnetic attraction member 22 is rapidly attenuated, which further affects the service life of the magnetic sleeve 2, and a large gap may easily accumulate a large amount of metal scraps, which indirectly affects the display of the magnetic attraction effect of the magnetic attraction member 22; Therefore, although the conventional magnetic sleeve 2 improves the problem of adding the protective member 13 to the previous conventional magnetic sleeve 1, the precise matching between the abutting surface 2141 and the magnetic attraction member 22 is required, which also causes processing The increase in difficulty and the increase in production costs and other deficiencies need to be improved.

Therefore, the object of the present invention is to provide a magnetic sleeve, which effectively avoids the loss of the magnetic member from being crushed during installation, and at the same time limits the gap between the mounting hole and the periphery of the magnetic member to a minimum Space to achieve a stable fixation of the magnetic element.

Therefore, the magnetic sleeve of the present invention includes a sleeve body and a magnetic attraction member arranged in the sleeve body; wherein, the sleeve body includes a sleeve section, and a sleeve section opposite to the sleeve section , A locking hole formed in the assembly section, and a mounting hole communicating with the locking hole, and the mounting hole is surrounded by a reference point as the center, and the periphery of the mounting hole is inward At least one detent surface is formed, and the detent surface and the peripheral edge of the mounting hole form two intersection points; when the mounting hole is provided with a detent surface, the diameter of the magnetic member is equal to the diameter of the mounting hole through the reference point to The distance between the locking surface and the joint surface between the two intersecting points are arranged in an arc shape, and when the mounting hole is provided with at least two locking surfaces, the radius of the magnetic attraction member is equal to the reference point to one of the locking surfaces The connecting surface between any two detent surfaces is arranged in an arc shape; therefore, when the magnetic element is installed, the magnetic element is restricted by the detent surface. And matching the peripheral edge of the magnetic attraction member and the mounting hole to create a gap for air discharge, and the gap is limited to the minimum space setting, which not only effectively prevents the magnetic attraction member from being crushed and broken during installation, but also avoids the accumulation of metal chips In the gap, it affects the display of the magnetic attraction effect of the magnetic attraction member, and achieves a stable fixation of the magnetic attraction member.

The foregoing and other technical content, features, and effects of the present invention will be clearly understood in the following detailed description of the preferred embodiment with reference to the drawings.

Referring to FIGS. 3 and 4, a first preferred embodiment of the magnetic sleeve 3 of the present invention. The magnetic sleeve 3 includes a sleeve body 31 and a magnetic attraction member 32 arranged in the sleeve body 31 ; Wherein, the sleeve body 31 includes a sleeve section 311, an assembly section 312 opposite to the sleeve section 311, a locking hole 313 formed in the assembly section 312, and a locking hole 313 is connected to the mounting hole 314, and the mounting hole 314 is surrounded by a reference point L as the center. In addition, the mounting hole 314 is recessed with a locking surface 315 inwardly, and the locking surface 315 and the The peripheral edge of the mounting hole 314 forms two intersecting points P, and the joint surface P1 between the two intersecting points P is arranged in an arc shape. Referring to FIG. 4, the diameter 32D of the magnetic attraction member 32 is equal to the peripheral edge of the mounting hole 314 passing through the reference point L to the The distance 314D from the center point of the locking surface 315 is such that when the magnetic member 32 is received in the mounting hole 314, the magnetic member 32 is tightly pressed by the locking surface 315, and the periphery of the magnetic member 32 is in contact with the A gap is formed at the periphery of the mounting hole 314, as shown in FIG. 5.

Referring to FIGS. 4 and 5, during the installation operation of the magnetic member 32, a force is applied to the magnetic member 32, so that the magnetic member 32 is pushed up and displaced in the direction of the mounting hole 314 At this time, the diameter 32D of the magnetic member 32 is equal to the distance 314D from the reference point L to the center point of the locking surface 315 from the periphery of the mounting hole 314, so that the size of the magnetic member 32 is slightly smaller than the size of the mounting hole 314 And the data difference between the size of the magnetic member 32 and the size of the mounting hole 314 is very small, so that the gap between the mounting hole 314 and the periphery of the magnetic member 32 is limited to the smallest space, so as to facilitate the magnetic member 32 When installed in the mounting hole 314, the air in the mounting hole 314 can be smoothly discharged through the gap, which not only effectively prevents the magnetic attraction member 32 from being crushed and broken during installation, but also passes through The gap is reduced to the smallest space, to avoid the accumulation of metal chips, and to reduce the area of the magnetic attraction member 32 in contact with the outside air, thereby slowing down the oxidation speed of the magnetic attraction member 32 and increasing the magnetic attraction force of the magnetic attraction member 32 The effect is demonstrated. In addition, in conjunction with the straight setting of the locking surface 315, the peripheral edge of the magnetic attraction member 32 is more effectively pressed against the magnetic attraction member 32 to achieve the effect of stably fixing the magnetic attraction member 32.

Referring to FIG. 6, after the magnetic member 32 is firmly fixed in the mounting hole 314, the user can put a handle (not shown) on the fitting section 311, and set the locking hole 313 Incorporate into a locking element 4, so as to perform assembly or disassembly operations of the locking element 4 by the magnetic sleeve 3. In addition, the magnetic sleeve 3 has magnetism to effectively position the lock The fixing element 4 not only effectively avoids excessive shaking of the fixing element 4 during the locking process, but also eliminates the need for the user to assist in fixing the lack of the fixing element 4 by hand, so that the assembly or disassembly operation of the fixing element 4 can be fast get on.

Referring to Figures 7 and 8, the second preferred embodiment of the present invention still includes the components described in the first embodiment, and its purpose and effect are the same as those of the first embodiment, and will not be repeated here. The present embodiment is particularly that: the mounting hole 314 has two detent surfaces 315 formed inwardly from the periphery, and the connecting surface 3151 between the two detent surfaces 315 is arranged in an arc shape, and the radius of the magnetic attraction member 32 is 32R It is equal to the distance 315D from the reference point L to the center point of a locking surface 315, so that the air in the mounting hole 314 can be discharged outward through the gap formed between the periphery of the magnetic attraction member 32 and the mounting hole 314, In order to greatly avoid the loss of crushing and crushing of the magnetic member 32 during installation, and at the same time, cooperate with the latching surfaces 315 to press against the periphery of the magnetic member 32 so as to stably fix the magnetic member 32. Of course, the installation The peripheral edge of the hole 314 can also be formed with three detent surfaces 315 inwardly, that is, as shown in FIG. 9 of the third preferred embodiment of the present invention, four detent surfaces 315 can also be formed inwardly from the peripheral edge of the mounting hole 314, namely As shown in FIG. 10 of the fourth preferred embodiment of the present invention, or the mounting hole 314 is formed with six locking surfaces 315 inwardly on the periphery, as shown in FIG. 11 of the fifth preferred embodiment of the present invention In order to increase the number of the detent surfaces 315, the magnetic attraction member 32 can be greatly stabilized.

In summary, the magnetic sleeve of the present invention has at least one detent surface formed inwardly from the periphery of the mounting hole, and two intersection points are formed between the detent surface and the periphery of the mounting hole. When the mounting hole is provided with a detent When facing, the diameter of the magnetic element is equal to the distance between the peripheral edge of the mounting hole through the reference point and the detent surface, and the joint surface between the two intersecting points is arranged in an arc shape, and when the mounting hole is provided with at least two detents When facing, the radius of the magnetic element is equal to the distance from the reference point to one of its detent surfaces, and the connecting surface between any two detent surfaces is arranged in an arc shape so that the magnetic component is installed in the mounting hole At the same time, there is a gap between the periphery of the magnetic attraction member and the mounting hole for air to be discharged, and the gap is restricted to the minimum space, which prevents metal chips from accumulating in the gap and affecting the display of the magnetic attraction effect of the magnetic attraction member. The area of the magnetic attraction member in contact with the outside air is reduced, thereby slowing down the oxidation speed of the magnetic attraction member. In addition, the latching surface is matched with the magnetic attraction member to effectively press against the magnetic attraction member to achieve a stable and fixed position of the magnetic attraction member.

However, what has been described above is only to illustrate the preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the description of the invention , Should still fall within the scope of the invention patent.

(Acquaintance) 1: Magnetic sleeve 11: Sleeve body 12: Magnetic parts 13: Protective parts 111: fit section 112: Assemble segment 113: lock hole 114: mounting hole 131: Groove 2: Magnetic sleeve 21: Sleeve body 22: Magnetic parts 211: fit section 212: Assembly section 213: Lock Hole 214: Mounting hole 2141: reach the top surface (this invention) 3: Magnetic sleeve 31: Sleeve body 32: Magnetic parts 311: fit section 312: Assembly section 313: Lock Hole 314: mounting hole 315: Snap Noodle 3151: contact surface 32D: The diameter of the magnetic part 32R: The radius of the magnetic part 314D: The distance between the peripheral edge of the mounting hole and the clamping surface 315D: The distance from the reference point to the card surface L: reference point P: intersection point P1: Joint surface 4: Locking components

Figure 1A is a perspective view of a conventional magnetic sleeve. Figure 1B is an end view of a conventional magnetic sleeve. Figure 2A is a perspective view of another conventional magnetic sleeve. Figure 2B is an end view of another conventional magnetic sleeve. Fig. 3 is a perspective view of the first preferred embodiment of the present invention. Figure 4 is an end view of the first preferred embodiment. Figure 5 is another end view of the first preferred embodiment. Fig. 6 is a schematic diagram of the use of the first preferred embodiment. Figure 7 is an end view of the second preferred embodiment of the present invention. Figure 8 is another end view of the second preferred embodiment. Figure 9 is an end view of the third preferred embodiment of the present invention. Figure 10 is an end view of a fourth preferred embodiment of the present invention. Figure 11 is an end view of a fifth preferred embodiment of the present invention.

3: Magnetic sleeve

31: Sleeve body

32: Magnetic parts

311: fit section

312: Assembly section

313: Lock Hole

314: mounting hole

315: Snap Noodle

Claims (2)

A magnetic sleeve includes a sleeve body and a magnetic attraction member arranged in the sleeve body; wherein the sleeve body includes a sleeve section, and a sleeve section opposite to the sleeve section, A locking hole formed in the assembly section, and a mounting hole communicating with the locking hole and for setting the magnetic member, and the mounting hole is surrounded by a reference point as the center, and A detent surface is formed inwardly on the periphery of the mounting hole, and two intersection points are formed between the detent surface and the periphery of the mounting hole. At the same time, the joint surface between the two intersection points is arranged in an arc shape; in addition, the diameter of the magnetic attraction member is equal to The distance from the periphery of the mounting hole through the reference point to the locking surface. A magnetic sleeve includes a sleeve body and a magnetic attraction member arranged in the sleeve body; wherein the sleeve body includes a sleeve section, and a sleeve section opposite to the sleeve section, A locking hole formed in the assembly section, and a mounting hole communicating with the locking hole and for setting the magnetic member, and the mounting hole is surrounded by a reference point as the center, and At least two detent surfaces are formed inwardly on the periphery of the mounting hole, and each detent surface forms two intersection points with the periphery of the mounting hole, and at the same time, the junction surface between any two detent surfaces is arranged in an arc shape; , The radius of the magnetic attraction element is equal to the distance from the reference point to one of its clamping surfaces.

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