TWI426977B - Magnetic fixture - Google Patents

Description

Magnetic seat

The invention relates to a magnetic seat.

The magnetic base is widely used in calibration, measurement or accessory installation due to its low price and quick and convenient clamping. The magnetic strength of the magnetic base can not be adjusted. When the user needs different magnetic forces, such as adjusting the position of the workpiece, the magnetic force is required to be weak, so that the workpiece can be adsorbed on the device and can be moved by a small external force. After the adjustment is completed, It is also required that the magnetic force becomes stronger, so that the workpiece is firmly fixed without moving. Since the magnetic force of the magnetic seat can not be adjusted, only the magnetic force can be controlled, and the user has to give up using the magnetic seat, and adopt other expensive installations. With.

In view of this, it is necessary to provide a magnetic seat capable of adjusting the magnitude of the magnetic force.

A magnetic seat includes a casing, a magnetic member and a mask assembly made of a magnetically permeable material. The outer casing includes a main body and a fixing member. The main body is provided with a guiding hole. The shielding assembly is received in the main body, and the fixing member is fixed to the main body. The mask assembly includes a cover body, a shielding plate and a connecting member, and the magnetic member is received in the cover body, and the cover body is provided with a through hole corresponding to one of the magnetic members, the shielding plate includes a shielding portion and a fixing portion extending on one side of the shielding portion, the shielding portion is in frictional contact with the cover body and movably shields at least a part of the through hole with respect to the cover body, one end of the connecting member is fixed to the fixing portion, and the other end protrudes from the guiding hole, the fixing member It is fixed outside the mask assembly and corresponds to the through hole.

When the magnetic seat is used, when the magnetic force of the magnetic seat needs to be adjusted, the area of the shielding through hole is changed, and a magnetic circuit line passing through the shielding plate forms a closed circuit in the mask assembly, thereby shielding part of the magnetic lines of force. The magnetic force of the magnetic seat is changed. By arranging the cover and the shutter, the shutter can selectively cover part or even almost all of the magnetic field, thereby adjusting the magnetic force of the magnetic seat.

100‧‧‧ magnetic seat

30‧‧‧Shell

32‧‧‧ Subject

321‧‧‧ side panel

323‧‧‧guide hole

325‧‧‧ positioning parts

34‧‧‧Fixed parts

50‧‧‧Mask assembly

52‧‧‧ Cover

522‧‧‧mask board

524‧‧‧through hole

54‧‧‧ visor

541‧‧‧Shading Department

543‧‧‧ Fixed Department

55‧‧‧Slide rails

56‧‧‧Connecting parts

562‧‧‧First connection

564‧‧‧Second connection

566‧‧‧ Third connection

58‧‧‧Operating parts

70‧‧‧Magnetic parts

1 is a perspective assembled view of a magnetic seat according to an embodiment of the present invention.

Figure 2 is a cross-sectional view taken along line II-II of Figure 1.

Figure 3 is a perspective view of the mask assembly of the magnetic seat shown in Figure 1.

The magnetic seat provided by the embodiment of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 and 2 , the magnetic seat 100 of the embodiment of the present invention includes a housing 30 , a mask assembly 50 , and a magnetic member 70 .

The outer casing 30 includes a main body 32 and a fixing member 34. In the present embodiment, the outer casing 30 is substantially a rectangular parallelepiped. The main body 32 includes a bottom plate (not shown) and four side plates 321 extending perpendicularly from the edge of the bottom plate. The one side plate 321 is provided with an elongated guide hole 323. A plurality of positioning members 325 are further disposed on the side plate 321 adjacent to the guiding holes 323. The positioning members 325 are located on one side of the guide holes 323 and are sequentially arranged in the extending direction of the guide holes 323. The main body 32 is made of a material that is not magnetically conductive. In the present embodiment, the main body 32 is made of copper. The fixing member 34 is fixed to the four side plates 321 away from one end of the bottom plate. In the present embodiment, the fixing member 34 is made of soft iron.

Referring to FIG. 3 at the same time, the mask assembly 50 includes a cover 52, a shutter 54, a slide rail 55, and a joint. The connector 56 and the operating member 58. Both the cover 52 and the shutter 54 are made of a magnetically permeable material. The cover 52 is shaped like the outer casing 30 and is slightly smaller in size than the outer casing 30 and is received within the outer casing 30. The cover 52 is composed of a six mask plate 522. The cover 52 has a through hole 524 formed in the mask plate 522 corresponding to one of the fixing members 34. In the present embodiment. The through hole 524 is square. The shutter 54 includes a shielding portion 541 and a fixing portion 543. The shielding portion 541 is substantially plate-shaped, and has the same shape and size as the through hole 524, and can cover the through hole 524. The number of the slide rails 55 is two, and the two slide rails 55 are fixed to the mask plate 522 and are respectively located at two ends of the through hole 524. The extending direction of the slide rail 55 is substantially the same as the extending direction of the guide hole 323. The two ends of the shielding portion 541 of the shielding plate 54 are respectively disposed on the two sliding rails 55, so that the shielding plate 54 is slidable along the sliding rail 55, so that the shielding plate 54 is connected to the shielding plate 522 by frictional contact, and can be arbitrarily The adjustment shielding portion 541 covers the size of the area of the through hole 524. The fixing portion 543 is connected to the shielding portion 541 and located on the outer side of the cover 52. In this embodiment, the two slide rails 55 can be fixed to the mask plate 522 by welding, so that the continuity between the cover 52 and the shutter 54 of the mask assembly 50 can be maintained by the slide rail 55, thereby further Maintains better magnetic continuity when masking the magnetic field.

The connecting member 56 includes a first connecting portion 562 , a second connecting portion 564 and a third connecting portion 566 extending perpendicularly from opposite ends of the first connecting portion 562 . The second connecting portion 564 and the third connecting portion 566 respectively extend to different sides of the first connecting portion 562. One end of the second connecting portion 564 away from the first connecting portion 562 is fixed to the fixing portion 543 of the shutter 54. The third connecting portion 566 protrudes from the one end of the first connecting portion 562 from the guiding hole 323 and protrudes outside the cover 52 . The operating member 58 is disposed outside the cover 52 and rotatably coupled to the third connecting portion 566. The operating member 58 is selectively affixed to one of the plurality of positioning members 325.

The magnetic member 70 is a permanent magnet. In the present embodiment, the magnetic member 70 is substantially elongated. Of course, the magnetic member 70 may also have other shapes such as a U shape. The magnetic member 70 is received in the cover 52 And one pole corresponds to the through hole 524.

In use, the workpiece (not shown) is placed on the fixing member 34, and the operating member 58 is pulled and the shutter 54 is slid relative to the mask 52 of the cover 52 by the connecting member 56 fixed to the operating member 58. The shielding portion 541 of the shutter 54 is no longer shielded by the through hole 524, so that the magnetic lines of the magnetic member 70 can magnetize the fixing member 34 through the through hole 524, thereby adsorbing the workpiece to the magnetic seat 100.

When the magnitude of the magnetic force of the magnetic base 100 needs to be adjusted, the operating member 58 is rotated so that it is no longer fixed to the positioning member 325, and the connecting member 56 is pulled to drive the masking plate 522 to slide, so that the shielding plate 54 shields part of the through hole 524, thereby The magnetic lines of force passing through the shutter 54 form a closed loop in the mask assembly 50, so that part of the magnetic lines of force can be shielded, and the magnetic force of the magnetic base 100 is reduced.

When the shutter 54 completely obscures the through hole 524, most of the magnetic lines of force are covered by the mask assembly 50, and the magnetic seat 100 exhibits extremely weak magnetic properties or does not exhibit magnetism.

By providing the cover 52 and the shutter 54 to partially cover even or almost all of the magnetic field, the magnetic force of the magnetic seat 100 can be adjusted, which is convenient to use.

It can be understood that the shutter 54 is not limited to being slidably disposed on the mask panel 522 by using a slide rail, and only the shutter 54 is disposed on the mask panel 522 using the friction component, so that the shutter 54 and the mask panel 522 are well maintained. Just touch it.

It can be understood that the operating member 58 and the positioning member 325 can also be engaged by means of engagement, that is, the operating member 58 is replaced with a gear, and the positioning member 325 is changed to a rack extending in the extending direction of the guiding hole 323 and meshing with the gear. Moving the gear along the rack can drive the shutter 54 to move.

It can be understood that the main body 32 of the outer casing 30 can be omitted, and the fixing member 34 is directly fixed to the cover at this time. One side of the body 52 is such that the fixing member 34 is opposed to the through hole 524.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

32‧‧‧ Subject

325‧‧‧ positioning parts

34‧‧‧Fixed parts

50‧‧‧Mask assembly

52‧‧‧ Cover

543‧‧‧ Fixed Department

562‧‧‧First connection

564‧‧‧Second connection

566‧‧‧ Third connection

58‧‧‧Operating parts

70‧‧‧Magnetic parts

Claims (5)

A magnetic seat includes a housing and a magnetic member, the housing including a main body having a guiding hole and a fixing member fixed to the main body, the fixing member for placing a workpiece to be fixed, wherein the magnetic seat further comprises a mask assembly made of a magnetically permeable material, the mask assembly is received in the main body, the mask assembly includes a cover body, a shutter and a connecting member, the magnetic member is received in the cover body, and the cover body is opened corresponding to a through hole of one of the magnetic members, the shielding plate includes a shielding portion and a fixing portion extending from a side of the shielding portion, the shielding portion frictionally contacting the cover body and movably shielding at least part of the shielding body The through hole has one end fixed to the fixing portion and the other end protruding from the guiding hole, and the fixing member is fixed outside the mask assembly and corresponds to the through hole. The magnetic seat of claim 1, wherein the mask assembly further comprises a slide rail disposed on the cover body, the shutter being slidably disposed on the cover body by the slide rail. The magnetic seat of claim 1, wherein the body comprises a bottom plate and a side plate extending perpendicularly from an edge of the bottom plate, and the fixing member is fixed to the side plate away from one end of the bottom plate. The magnetic seat of claim 1, wherein the outer casing further comprises a plurality of positioning members fixed to the main body, the mask assembly further comprising an operating member connected to the connecting member and extending the guiding hole In one end, the operating member is selectively fixable to one of the plurality of positioning members. The magnetic seat of claim 1, wherein the mask assembly further comprises a rack disposed on the cover and a gear meshing with the rack, the rack extending in the same direction as the guide hole The connecting piece is connected to the gear from one end of the guiding hole.