TWM482007U - Magnetic-resistance device - Google Patents

Description

Magnetoresistive device

This creation relates to a magnetoresistive device, especially a magnetoresistive device that produces magnetic resistance.

In general, most of the conventional fitness equipment uses the method of increasing or decreasing the metal block to change the weight of the user's feeling. However, in the process of using such fitness equipment, the metal block will continuously collide, resulting in metal blocks and other Components are easily damaged, which in turn increases the cost of maintenance of fitness equipment.

In recent years, with the development of magnetoresistive devices, magnetoresistive devices have been applied to motors, fitness equipment, etc. Fitness equipment using magnetoresistive devices can use magnetic resistance to allow users to feel the weight and improve the fitness. The shortcomings of frequent collisions between equipment components, but the structure of the magnetoresistive device used for generating magnetic resistance is relatively complicated, and it is inconvenient to operate when the magnitude of the magnetic resistance generated by the magnetoresistive device is to be adjusted.

In order to solve the above-mentioned shortcomings of the prior art, one of the objects of the present invention is to provide a magnetoresistive device, in order to simplify the structure of the magnetoresistive device and to achieve the effect of conveniently generating magnetic resistance.

Another object of the present invention is to provide a magnetoresistive device in order to achieve the effect of easily changing the magnitude of the magnetic resistance generated.

To achieve the above and other objects, the present invention provides a magnetoresistive device comprising a housing, an inner tube body, a screw, a magnet, at least one protruding unit and at least one metal member. The housing includes a metal tube body, a first cover body and a second cover body. The metal tube body includes a first end and a second end. The first cover body is disposed on the metal tube body. The first end includes a through hole, and the second cover is disposed at the second end of the metal pipe body; the inner pipe system is rotatably disposed in the casing; the screw is slidably disposed therein The inner surface of the inner tube body is disposed on the outer wall surface of the inner tube body; the at least one protruding unit is disposed on the inner wall surface of the inner tube body, and the at least one protruding unit abuts a surface thread of the screw; and the at least one metal member is disposed on the metal tube body adjacent to the magnet.

In the magnetoresistive device as described above, the metal pipe body includes at least one through hole, the at least one through hole is disposed on a side wall surface of the metal pipe body, and the metal member is annular and disposed on the metal pipe body, and the magnetic body The resisting device further includes an adjusting unit, the adjusting unit is slidably disposed on the housing, the adjusting unit is connected to the metal member to drive the metal member to slide relative to the metal tubular body, and the adjusting unit is configured to pass at least one pass The aperture secures its relative position to the metal tubular body.

In the magnetoresistive device as described above, the metal member is disposed on the inner wall surface of the metal pipe body, and the adjusting unit protrudes from the outer surface of the metal pipe by the through hole, and the periphery of the through hole of the metal pipe body includes each other a plurality of fastening portions spaced apart, the adjustment unit being fastened to one of the fastening portions.

In the magnetoresistive device as described above, the metal tube body includes a plurality of through holes spaced apart from each other, and the metal member is disposed around the outer wall surface of the metal tube body, and the adjusting unit is fixed in the through hole One.

In the magnetoresistive device as described above, the at least one protruding unit is an internal thread or a protruding post.

In the magnetoresistive device as described above, the at least one protruding unit comprises a cylinder, a spring and a steel ball, the cylinder comprises a mounting groove, and the mounting groove faces the inner opening of the inner tube body, and the spring The steel ball is disposed between the spring and the surface thread of the screw.

The magnetoresistive device as described above further includes a coil set fixed in the housing adjacent to the magnet.

Therefore, the magnetoresistive device of the present invention is configured to move along the surface of the screw by the protruding unit protruding from the inner wall surface of the inner tube body, so that the inner tube body can be rotated when the screw slides. Therefore, magnetic resistance can be conveniently generated between the magnet, the metal member and the metal tube of the housing; further, an adjusting unit can be further disposed to change the distance between the metal member and the magnet through the adjusting unit To achieve the effect of conveniently changing the magnitude of the magnetic resistance generated between the magnet, the metal member and the metal tube of the housing when the magnet is rotated.

In order to fully understand the purpose, features and effects of this creation, the following specific examples, together with the attached drawings, provide a detailed description of the creation, as explained below:

Referring to FIG. 1 and FIG. 2, FIG. 1 is a perspective view of a magnetoresistive device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a magnetoresistive device of the first embodiment of the present invention. As shown, the magnetoresistive device 10 of the present invention comprises a housing 110, an inner tube 120, a screw 130, a magnet 140, at least one protruding unit 150 and at least one metal member 160.

The housing 110 includes a metal tube 112, a first cover 114 and a second cover 116. The metal tube 112 includes a first end 1121 and a second end 1122. The first cover 114 The first end 1121 of the metal pipe body 112 is disposed at the first end 1121 and includes a through hole 1141 , and the second cover 116 is disposed at the second end 1122 of the metal pipe body 112 .

The inner tube body 120 is rotatably disposed in the housing 110. In the present embodiment, the two ends of the inner tube body 120 are respectively disposed on the first cover body 114 and the second cover body 116 by a bearing 122, so that the inner tube body 120 can be opposite to the first cover body 114. Rotating with the second cover 116.

The screw 130 is slidably disposed in the inner tube body 120 and penetrates the through hole 1141. That is, the first end of the screw 130 protrudes from the first cover body 114.

The magnet 140 is disposed on the outer wall surface of the inner tubular body 120, and the length of the magnet 140 is shorter than the length of the inner tubular body 120 and can be disposed at a central position of the inner tubular body 120.

The protruding unit 150 is convexly disposed on the inner wall surface of the inner tubular body 120 , and the protruding unit 150 abuts against the surface thread 132 of the screw 130 .

The metal member 160 is disposed adjacent to the metal tube 112 and adjacent to the magnet 140. In the embodiment, the metal member 160 is annular and fixed in the metal tube 112.

The material of the metal pipe body 112 is made of iron material for magnetic conduction, and the material of the metal member 160 is made of aluminum or copper material for generating eddy current thereon.

Specifically, the user can pull the screw 130 by the screw 130 protruding from one end of the through hole 1141 to slide the screw 130 relative to the inner tube 120, and then protrude into the inner tube 120. The protruding unit 150 of the wall will move along the surface thread 132 of the screw 130, thereby driving the inner tube 120 to rotate relative to the housing 110, in other words, through the protruding unit 150 and the surface thread 132 of the screw 130. The linear motion of the screw 130 is converted into the rotational motion of the inner tube body 120, thereby driving the magnet 140 disposed on the outer wall surface of the inner tube body 120, and rotating the magnet 140 relative to the metal member 160 and the metal tube body 112. An eddy current is generated on the metal member 160 and is guided through the metal tube body 112 to form a magnetic resistance between the magnet 140, the metal member 160 and the metal tube body 112. The rotation of the magnet 140 is resisted to resist the sliding of the screw 130, and the user feels a certain load when pulling and pushing the screw 130.

Therefore, the magnetoresistive device 10 of the present invention simplifies the structure of the magnetoresistive device, and can convert the linear motion of the screw 130 into the rotational motion of the inner tube 120, thereby conveniently the magnet 140 and the metal member. A magnetic resistance is generated between the 160 and the metal pipe body 112 of the casing 110, so that resistance is felt when the screw 130 is pulled and pushed.

Please refer to FIG. 3 to FIG. 6 . FIG. 3 is a perspective view of the magnetoresistive device of the second embodiment of the present invention. FIG. 4 is a cross-sectional view of the magnetoresistive device of the second embodiment of the present invention. 5 is a perspective view of a second embodiment of the magnetoresistive device of the second embodiment, and FIG. 6 is a cross-sectional view 2 of the magnetoresistive device of the second embodiment of the present invention. As shown in the figure, the magnetoresistive device 100 of the present invention comprises a housing 110, an inner tube 120, a screw 130, a magnet 140, at least one protruding unit 150, a metal member 160 and an adjusting unit 170.

The housing 110 includes a metal tube 112, a first cover 114 and a second cover 116. The metal tube 112 includes a first end 1121, a second end 1122 and a through hole 1123. The first cover 114 is disposed on the first end 1121 of the metal tube 112 and includes a through hole 1141, and the second cover 116 is disposed on the metal. The second end 1122 of the tubular body 112.

The inner tube body 120 is rotatably disposed in the housing 110. In the present embodiment, the two ends of the inner tube body 120 are respectively disposed on the first cover body 114 and the second cover body 116 by a bearing 122, so that the inner tube body 120 can be opposite to the first cover body 114. Rotating with the second cover 116.

The screw 130 is slidably disposed in the inner tube body 120 and penetrates the through hole 1141. That is, the first end of the screw 130 protrudes from the first cover body 114.

The magnet 140 is disposed on the outer wall surface of the inner tubular body 120, and the length of the magnet 140 is shorter than the length of the inner tubular body 120 and can be disposed at a central position of the inner tubular body 120.

The protruding unit 150 is convexly disposed on the inner wall surface of the inner tubular body 120 , and the protruding unit 150 abuts against the surface thread 132 of the screw 130 .

The metal member 160 is disposed adjacent to the metal tube 112 and adjacent to the magnet 140. In the embodiment, the metal member 160 is annular and disposed in the metal tube 112.

The adjusting unit 170 is slidably disposed on the housing 110, and the adjusting unit 170 is coupled to the metal member 160 to drive the metal member 160 to slide relative to the metal tube 112, and the adjusting unit 170 is configured to pass through the through hole 1123 fixes its relative position to the metal body 112.

The material of the metal pipe body 112 is made of iron material for magnetic conduction, and the material of the metal member 160 is made of aluminum or copper material for generating eddy current thereon.

Specifically, the user can pull the screw 130 by the screw 130 protruding from one end of the through hole 1141 to slide the screw 130 relative to the inner tube 120, and then protrude into the inner tube 120. The protruding unit 150 of the wall will move along the surface thread 132 of the screw 130, thereby driving the inner tube 120 to rotate relative to the housing 110, in other words, through the protruding unit 150 and the surface thread 132 of the screw 130. The linear motion of the screw 130 is converted into the rotational motion of the inner tube body 120, thereby driving the magnet 140 disposed on the outer wall surface of the inner tube body 120, and rotating the magnet 140 relative to the metal member 160 and the metal tube body 112. An eddy current is generated on the metal member 160 and is guided through the metal tube body 112 to form a magnetic resistance between the magnet 140, the metal member 160 and the metal tube body 112. The rotation of the magnet 140 is resisted to resist the sliding of the screw 130, and the user feels a certain load when pulling and pushing the screw 130.

In addition, in the embodiment, the metal member 160 is disposed on the inner wall surface of the metal pipe body 112, and the adjusting unit 170 protrudes from the metal pipe body 112 by the through hole 1123, and the metal pipe body 112 The circumference of the through hole 1123 includes a plurality of fastening portions 1124 spaced apart from each other. The adjustment unit 170 is fastened to one of the fastening portions 1124, and the inner diameter of the metal member 160 is larger than the inner tubular body 120. The outer diameter of the metal member 160 is maintained at a distance from the inner tubular body 120 such that the metal member 160 is slidable relative to the metal tubular body 112 and movable between the magnet 140 and the metal tubular body 112.

If the magnitude of the magnetic resistance is to be adjusted, the adjusting unit 170 adjusts the position of the metal member 160 relative to the magnet 140. First, the adjusting unit 170 is moved in the through hole 1123 to drive the metal member. The sliding of the metal tube 112 relative to the metal tube 112 changes the area of the metal member 160 covering the magnet 140. The larger the area of the metal member 160 covering the magnet 140, that is, the closer the metal member 160 is to the magnet 140, the When the magnet 140 rotates, the magnetic resistance generated between the magnet 140, the metal member 160, and the metal pipe body 112 increases. As shown in FIGS. 3 and 4, the metal member 160 moves. To completely surround the position of the magnet 140, the magnetic resistance that can be generated between the magnet 140, the metal member 160 and the metal tube 112 is maximum; conversely, when the metal member 160 covers the magnet The smaller the area of 140, that is, the further the metal member 160 is away from the magnet 140, the smaller the magnetic resistance generated between the magnet 140, the metal member 160 and the metal tube 112. Therefore, the magnetoresistive device 100 of the present invention can easily change the magnitude of the generated magnetic resistance through the adjusting unit 170, thereby changing the magnitude of the load felt when the user pulls and pushes the screw 130, so that the magnetoresistive device is made. 100 can be further applied to a fitness equipment (not shown).

In addition, after the adjusting unit 170 moves the metal member 160 to the desired position by moving in the through hole 1123, the adjusting unit 170 can be moved toward the periphery of the through hole 1123 to fix the adjusting unit 170 to the phase. Corresponding one of the fastening portions 1124 further fixes the position of the metal member 160 relative to the magnet 140 to achieve the effect of fixing the magnetic resistance generated by the magnetoresistive device 100.

In this embodiment, the protruding unit 150 includes a cylinder 152, a spring 154 and a steel ball 156. The cylinder 152 includes a mounting groove 1521, and the mounting groove 1521 opens toward the inner portion of the inner tube 129. The spring 154 is disposed in the mounting groove 1521. The steel ball 156 is disposed between the spring 154 and the surface thread 132 of the screw 130, so that the steel ball 156 can be held in contact with the spring 154. The surface thread 132 of the screw 130 is such that during movement of the screw 130, the ball 156 remains moved along the recess of the surface thread 132 to convert the linear motion of the screw 130 to the rotation of the inner tube 120 as described above. motion. The embodiment of the protruding unit 150 is not limited to the embodiment and the illustration, and may be an internal thread or a protrusion for the thread 132 along the surface of the screw 130 during the sliding of the screw 130. Moving, the inner tube body 120 is rotated.

In addition, in the embodiment, the magnetoresistive device 100 further includes a coil assembly 180 fixed in the housing 110 adjacent to the magnet 140, and the magnet 140 is disposed on the inner tube When the body 120 is rotated and rotated, an induced electromotive force is generated in the coil group 180 to form an induced current, that is, the magnetic force is converted into electric power, so that a connection line (not shown) can be connected to the coil assembly 180 and an external device. Between (not shown), the magnetoresistive device 100 is supplied as a power source to the external device, and when the magnetoresistive device 100 is applied to a fitness equipment (not shown), the external device It can be a display screen of the fitness equipment, and the display screen can be used to display information about the fitness equipment.

Please refer to FIG. 7 to FIG. 10 , FIG. 7 is a perspective schematic view of a magnetoresistive device according to a third embodiment of the present invention, and FIG. 8 is a cross-sectional view 1 of the magnetoresistive device of the third embodiment of the present invention. FIG. 9 is a perspective view showing a second embodiment of the magnetoresistive device of the third embodiment, and FIG. 10 is a cross-sectional view 2 of the magnetoresistive device of the third embodiment of the present invention. As shown in the figure, the magnetoresistive device 200 of the present invention comprises a housing 210, an inner tube 220, a screw 230, a magnet 240, at least one protruding unit 250, a metal member 260 and an adjusting unit 270.

The housing 210 includes a metal tube 212, a first cover 214 and a second cover 216. The metal tube 212 includes a first end 2121, a second end 2122 and at least one through hole 2123. The at least one through hole 2123 is disposed on the side wall surface of the metal pipe body 212, and the first cover body 214 is disposed on the first end 2121 of the metal pipe body 212 and includes a through hole 2141, and the second cover body 216 is disposed on the second cover body 216. The second end 2122 of the metal body 212.

The inner tube body 220 is rotatably disposed in the housing 210. In the present embodiment, the two ends of the inner tube body 220 are respectively disposed on the first cover body 214 and the second cover body 216 by a bearing 222, so that the inner tube body 220 can be opposite to the first cover body 214. Rotating with the second cover 216.

The screw 230 is slidably disposed in the inner tube body 220 and penetrates the through hole 2141. That is, the first end of the screw 230 protrudes from the first cover body 214.

The magnet 240 is disposed on the outer wall surface of the inner tubular body 220, and the length of the magnet 240 is shorter than the length of the inner tubular body 220 and can be disposed at a central position of the inner tubular body 220.

The protruding unit 250 is protruded from the inner wall surface of the inner tubular body 220, and the protruding unit 250 abuts against the surface thread 232 of the screw 230.

The metal member 260 is disposed adjacent to the metal tube 212 and adjacent to the magnet 240. In the embodiment, the metal member 260 is annular and disposed outside the metal tube 212.

The adjusting unit 270 is slidably disposed on the housing 210, and the adjusting unit 270 is coupled to the metal member 260 to drive the metal member 260 to slide relative to the metal tubular body 212, and the adjusting unit 270 is configured to pass at least one pass The hole 2123 fixes its relative position to the metal pipe body 212.

The metal pipe body 212 is made of aluminum or copper for eddy current, and the metal member 260 is made of iron material for magnetic conduction.

Specifically, the user can pull the screw 230 by one end of the screw 230 protruding from the end of the through hole 2141, so that the screw 230 slides relative to the inner tube body 220, and then protrudes into the inner tube body 220. The protruding unit 250 of the wall will move along the surface thread 232 of the screw 230, thereby driving the inner tube 220 to rotate relative to the housing 210, in other words, through the protruding unit 250 and the surface thread 232 of the screw 230. The linear motion of the screw 230 is converted into the rotational motion of the inner tube body 220, thereby driving the magnet 240 disposed on the outer wall surface of the inner tube body 220 to rotate the magnet 240 relative to the metal tube body 212 and the metal member 260. An eddy current is generated on the metal tube 212 and is magnetically transmitted through the metal member 260, and a magnetic resistance is formed between the magnet 240, the metal tube 212 and the metal member 260. The rotation of the magnet 240 is generated to resist the sliding of the screw 230, thereby allowing the user to feel a certain load when pulling and pushing the screw 230.

In addition, in the present embodiment, the metal tube body 212 includes a plurality of through holes 2123 spaced apart from each other, and the metal member 260 is disposed around the outer wall surface of the metal tube body 212, and the adjusting unit 170 is fastened thereto. One of the through holes 2123. The through holes 2123 are arranged along the axial direction of the metal pipe 212, and the adjusting unit 170 includes a supporting portion 271, a pressing portion 272, a pivot 273, a spring 274 and a positioning portion 275. The support portion 271 is fixed to the outer wall surface of the metal member 260, and the pressing portion 272 is pivotally connected to the support portion 271 and connected to the positioning portion 275, and the spring 274 is coupled to the support portion 271. Between the positioning portions 275, the positioning portion 275 is configured to be engaged with one of the through holes 2123. When the pressing portion 272 is rotated about the pivot portion 273 with respect to the supporting portion 271, the pressing portion 272 will move the positioning portion 275 to disengage the positioning portion 275 from the through hole 2123.

If the magnitude of the magnetic resistance is to be adjusted, the adjustment unit 270 adjusts the position of the metal member 260 relative to the magnet 240. First, the pressing portion 272 is biased to disengage the positioning portion 275 from the through hole 2123. After the adjustment unit 270 is moved, the metal member 260 is slid relative to the metal tube 212, thereby changing the area of the metal member 260 covering the magnet 240. When the metal member 260 covers the area of the magnet 240, the area is increased. The larger, that is, the closer the metal member 260 is to the magnet 240, the greater the magnetic resistance generated between the magnet 240, the metal tube 212, and the metal member 260, such as when the magnet 240 is rotated, such as As shown in FIGS. 7 and 8, the metal member 260 is moved to a position completely surrounding the magnet 240, and the magnet 240, the metal tube 212, and the metal member 260 can be generated between the magnet 240 and the metal member 260. The magnetic resistance is the largest; on the contrary, the smaller the area of the metal member 260 covering the magnet 240, that is, the farther the metal member 260 is away from the magnet 240, the magnet 240, the metal tube 212, and the metal member 260 The smaller the magnetic resistance generated between, the magnetic of the creation The device 200 can conveniently change the magnitude of the generated magnetic resistance through the adjusting unit 270, thereby changing the magnitude of the weight felt when the user pulls and pushes the screw 230, so that the magnetoresistive device 200 can be further applied to a fitness equipment. (not shown).

In addition, after the adjusting unit 270 moves the metal member 260 to the desired position, the pressing portion 272 of the adjusting unit 270 can be released, and the contraction force of the spring 274 will pull the positioning portion 275 toward the metal. The tubular body 212 is moved to fix the positioning portion 275 to the corresponding one of the through holes 2123, thereby fixing the position of the metal member 260 relative to the magnet 240 to achieve the magnetic resistance generated by the magnetoresistive device 200. efficacy.

In the present embodiment, the protruding unit 250 is an internal thread that is engaged with the surface thread 232 of the screw 230 to maintain the internal thread along the surface thread 232 during movement of the screw 230. Moving, the linear motion of the screw 230 is converted into the rotational motion of the inner tubular body 220 as described above.

In addition, in the embodiment, the magnetoresistive device 200 further includes a coil assembly 280 that is fixed in the housing 210 and rotated by the inner tube 220. An induced electromotive force is generated in the coil assembly 280 to form an induced current, that is, a magnetic force is converted into electric power, and thus a connection line (not shown) can be connected to the coil assembly 280 and an external device (not shown). And causing the magnetoresistive device 200 to supply power to the external device as a power source, and when the magnetoresistive device 200 is applied to a fitness device (not shown), the external device may be the fitness device A display screen that can be used to display information about the fitness equipment.

In summary, the magnetoresistive device of the present invention moves along the surface of the screw by the protruding unit protruding from the inner wall surface of the inner tube body, so that the inner tube can be driven when the screw slides. Rotating the body to facilitate magnetic resistance between the magnet, the metal member and the metal tube of the housing; further, an adjusting unit may be further provided to change the metal member and the magnet through the adjusting unit The distance is such as to conveniently change the magnitude of the magnetic resistance generated between the magnet, the metal member and the metal tube of the housing when the magnet is rotated.

The present invention has been disclosed in the above preferred embodiments, and it should be understood by those skilled in the art that the present invention is only intended to depict the present invention and should not be construed as limiting the scope of the present invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of patent application.

10‧‧‧Magnetoresistive device
100‧‧‧Magnetoresistive device
110‧‧‧shell
112‧‧‧Metal pipe body
1121‧‧‧ first end
1122‧‧‧ second end
1123‧‧‧through hole
1124‧‧‧Card Department
114‧‧‧First cover
1141‧‧‧Perforation
116‧‧‧Second cover
120‧‧‧ inner tube
122‧‧‧ bearing
130‧‧‧ screw
132‧‧‧Surface thread
140‧‧‧ magnet
150‧‧‧ protruding unit
152‧‧‧Cylinder
1521‧‧‧Installation slot
154‧‧ ‧ spring
156‧‧‧ steel balls
160‧‧‧Metal parts
170‧‧‧Adjustment unit
180‧‧‧ coil set
200‧‧‧Magnetoresistive device
210‧‧‧Shell
212‧‧‧Metal pipe body
2121‧‧‧ first end
2122‧‧‧ second end
2123‧‧‧through hole
214‧‧‧First cover
2141‧‧‧Perforation
216‧‧‧Second cover
220‧‧‧ inner tube
222‧‧‧ bearing
230‧‧‧ screw
232‧‧‧Surface thread
240‧‧‧ magnet
250‧‧‧ protruding unit
260‧‧‧Metal parts
270‧‧‧Adjustment unit
271‧‧‧Support
272‧‧‧ Pressing Department
273‧‧‧ pivot
274‧‧‧ Spring
275‧‧‧ Positioning Department
280‧‧‧ coil set

Fig. 1 is a perspective view showing the magnetoresistive device of the first embodiment of the present invention. Fig. 2 is a schematic cross-sectional view showing a magnetoresistive device of the first embodiment of the present invention. Figure 3 is a perspective view of the magnetoresistive device of the second embodiment of the present invention. Fig. 4 is a cross-sectional view showing the second embodiment of the magnetoresistive device of the second embodiment. Figure 5 is a perspective view 2 of the magnetoresistive device of the second embodiment of the present invention. Fig. 6 is a cross-sectional view showing the second embodiment of the magnetoresistive device of the second embodiment. Figure 7 is a perspective view of the magnetoresistive device of the third embodiment of the present invention. Figure 8 is a cross-sectional view showing the first embodiment of the magnetoresistive device of the third embodiment. Figure 9 is a perspective view 2 of the magnetoresistive device of the third embodiment of the present invention. Figure 10 is a cross-sectional view showing the second embodiment of the magnetoresistive device of the third embodiment.

10‧‧‧Magnetoresistive device

110‧‧‧shell

112‧‧‧Metal pipe body

1121‧‧‧ first end

1122‧‧‧ second end

114‧‧‧First cover

1141‧‧‧Perforation

116‧‧‧Second cover

120‧‧‧ inner tube

122‧‧‧ bearing

130‧‧‧ screw

132‧‧‧Surface thread

140‧‧‧ magnet

150‧‧‧ protruding unit

160‧‧‧Metal parts

Claims (7)

A magnetoresistive device comprising: a housing comprising a metal tube body, a first cover body and a second cover body, the metal tube body comprising a first end and a second end, the first cover body The second end of the metal pipe body is disposed at the second end of the metal pipe body, and the second cover body is disposed at the second end of the metal pipe body; an inner pipe body is rotatably disposed in the casing; a screw slidably disposed in the inner tube body and penetrating the through hole; a magnet disposed on an outer wall surface of the inner tube body; at least one protruding unit protrudingly disposed on an inner wall surface of the inner tube body And the at least one protruding unit abuts against the surface thread of the screw; and at least one metal member is disposed on the metal pipe body and adjacent to the magnet. The magnetoresistive device of claim 1, wherein the metal pipe body comprises at least one through hole, the at least one through hole is disposed on a side wall surface of the metal pipe body, and the metal member is annular and disposed on the metal pipe body. The reluctance device further includes an adjustment unit slidably disposed on the housing, the adjustment unit is coupled to the metal member to drive the metal member to slide relative to the metal tube body, and the adjustment unit is The at least one through hole fixes its relative position to the metal pipe body. The magnetoresistive device of claim 2, wherein the metal member is disposed on an inner wall surface of the metal pipe body, and the adjusting unit protrudes from the outer surface of the metal pipe by the through hole, and the through hole of the metal pipe body The periphery includes a plurality of fastening portions spaced apart from each other, the adjustment unit being fastened to one of the fastening portions. The magnetoresistive device of claim 2, wherein the metal tube body comprises a plurality of through holes spaced apart from each other, and the metal member is disposed around the outer wall surface of the metal tube body, and the adjusting unit is clamped to the through holes One of the holes. The magnetoresistive device of claim 1, wherein the at least one protruding unit is an internal thread or a protruding post. The magnetoresistive device of claim 1, wherein the at least one protruding unit comprises a cylinder, a spring and a steel ball, the cylinder comprises a mounting groove, and the mounting groove faces the inner opening of the inner tube body, The spring is disposed in the mounting groove, and the steel ball is disposed between the spring and a surface thread of the screw. The magnetoresistive device of claim 1, further comprising a coil set fixed in the housing adjacent to the magnet.