solenoid

Abstract

To use a solenoid that can improve the detection accuracy of the moving state of a movable iron core.SOLUTION: A solenoid 1 includes a coil 6, a movable iron core 8 that moves when the coil 6 is energized, a magnetic sensor 23 that detects the moving state of the movable iron core by detecting a change in leakage magnetic flux from the coil 6 caused by energizing the coil 6, and an adjustment unit 30 that tilts the magnetic sensor 23 to adjust the magnetic sensing direction α of the magnetic sensor 23 to an arbitrary angle.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technology for a solenoid with a magnetic sensor. [Background technology]

[0002] Various technologies related to solenoids that move a movable core using magnetic flux generated when a current is passed through a coil have been known. Some solenoids are equipped with a magnetic sensor that detects the movement of the movable core by detecting changes in leakage magnetic flux from the coil when current is passed through the coil (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-218608 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the solenoid, when the coil is energized, a vortex-shaped magnetic field is generated, and the leakage magnetic flux from the coil may be perpendicular to the magnetic sensing direction of the magnetic sensor. In such a case, the magnetic flux density that the magnetic sensor can detect may be low, and the detection position of the movable iron core may be outside the detection threshold range of the magnetic sensor. For this reason, it is necessary to change the installation position of the magnetic sensor so that the leakage magnetic flux from the coil is within the detection threshold range of the magnetic sensor for the movement state of the movable iron core. However, in the above-mentioned solenoid, there is variation in the installation accuracy of the magnetic sensor installation position, and there is also variation in the leakage magnetic flux from the coil and the detection threshold of the magnetic sensor, making it difficult to ensure that the leakage magnetic flux from the coil falls within the range of the detection threshold of the magnetic sensor for the movement state of the movable iron core, and making it difficult to improve the detection accuracy of the movement state of the movable iron core.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a solenoid that can improve the accuracy of detecting the moving state of the movable iron core. [Means for solving the problem]

[0006] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0007] That is, in claim 1, the solenoid comprises a coil, a movable iron core that moves when current is passed through the coil, a magnetic sensor that detects the movement state of the movable iron core by detecting changes in leakage magnetic flux from the coil that occurs when current is passed through the coil, and an adjustment unit that tilts the magnetic sensor to adjust the magnetic sensing direction of the magnetic sensor to any angle.

[0008] In claim 2, a frame is provided that is arranged outside the movable iron core, and the adjustment unit includes an operating unit that is operated when adjusting the magnetic sensing direction of the magnetic sensor to any angle, and an adjustment body to which the magnetic sensor is attached, the frame has a hole, the operating unit is inserted into the hole in the frame and attached, and the adjustment body is fixed to the frame, and by operating the operating unit, the insertion depth of the operating unit into the hole in the frame is made shallower or deeper, thereby changing the degree of pressure applied to the adjustment body by the operating unit, and adjusting the magnetic sensing direction of the magnetic sensor to any angle.

[0009] In claim 3, the adjusting body is configured to be elastically deformable, and when adjusting the magnetic sensing direction of the magnetic sensor to any angle, the operating unit is operated by the operator, thereby deforming and adjusting the magnetic sensing direction of the magnetic sensor to any angle. [Effects of the Invention]

[0010] The present invention has the following effects. That is, according to the present invention, it is possible to improve the accuracy of detecting the moving state of the movable core. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view showing a solenoid according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 10 is a cross-sectional view showing the state in which the movable core of the solenoid has moved toward the fixed core. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Next, the solenoid shown in FIGS. 1 to 8 will be described. In the following description, the solenoid 1 will be described using the up-down direction or the front-rear direction in the drawings, but the direction of the solenoid 1 is not limited to this.

[0013] The solenoid 1 is a solenoid with a magnetic sensor, and moves the movable iron core 8 toward the fixed iron core 7 by the magnetic flux generated when the coil 6 is energized. In the solenoid 1, the magnetic sensor 24 detects the movement state of the movable iron core 8 by detecting a change in the leakage magnetic flux from the coil 6 that occurs when the coil 6 is energized. The solenoid 1 is used in various precision instruments, etc. Examples of applications in which the solenoid 1 is used include a switching valve for a gas pipe, a pusher for a sorting machine, office automation equipment such as a printer or a copying machine, a gaming machine, or an internal combustion engine.

[0014] As shown in Figures 1 to 8, the solenoid 1 includes a case 2, a coil 6, a fixed iron core 7, a movable iron core 8, a frame 10, a contact portion 20, a stopper 21, a protrusion 22, a magnetic sensor 24, and an adjustment portion 30.

[0015] The case 2 is made of a magnetic material such as iron, and is formed into a generally U-shape in side view by bending the front and rear ends of a flat plate member upward. Inside the case 2, a fixed core 7, a coil 6, and a part of a movable core 8 are arranged. The bent portion on the front end side of the case 2 forms the lid portion of the case 2. The bent portion on the rear end side of the case 2 forms the bottom portion of the case 2. An insertion hole 5 is formed in approximately the center of the lid portion of the case 2.

[0016] Coil 6 is disposed inside case 2 (between the lid and bottom of case 2). Coil 6 is wound with a hollow center so that it can move in the front-to-rear direction with movable core 8 inserted therethrough. The coil 6 is connected to an electric wiring (not shown) for supplying electricity to the coil 6 .

[0017] The fixed core 7 is disposed within the coil 6 and fixed to the bottom of the case 2. The fixed core 7 is configured so that its front surface (the surface on the movable core 8 side) is cut out so that it roughly coincides with one end of the movable core 8 so that one end (tip) of the movable core 8 can be placed thereon.

[0018] The movable core 8 is inserted into the insertion hole 5 and the coil 6 of the case 2 and is configured to be movable in the front-to-rear direction (the opposite side to the fixed core 7 or the fixed core 7 side). A part (one end) of the movable core 8 is disposed inside the case 2. One end (tip) of the movable core 8 is disposed so as to face the front surface of the fixed core 7. One end of the movable core 8 is formed in a truncated cone shape.

[0019] The frame 10 is disposed on the outside of the case 2, the coil 6, and the movable iron core 8. The frame 10 is configured to be roughly square-shaped when viewed from the side, and is configured to surround the top and bottom outer sides and the front and rear outer sides of the case 2, the coil 6, and the movable iron core 8. The frame 10 includes a first frame 11, a second frame 12, a third frame 13, a through hole 14, and a notch 15.

[0020] The first frame 11 of the frame 10 is formed by bending the front end of a flat plate-shaped member upward, so that it is roughly L-shaped in side view. The bent portion on the front end side of the first frame 11 (the front portion of the first frame 11) is positioned a predetermined distance from the lid portion of the case 2 and forms the front plate portion of the frame 1. A through-hole 14 is formed in the approximate center of the front portion of the first frame 11. The lower portion of the first frame 11 is positioned below the case 2 and forms the lower plate portion of the frame 10.

[0021] The second frame 12 of the frame 10 is made of a flat plate-shaped member. The second frame 12 is configured to stand upright from the lower part of the first frame 11, with its lower end fixed to the rear end of the lower part of the first frame 11. The case 2 is fixed to the lower part of the first frame 11 and the second frame 12. The second frame 12 is disposed behind the case 2 and constitutes the rear plate portion of the frame 10.

[0022] The third frame 13 of the frame 10 is made of a flat, non-magnetic member. The front end of the third frame 13 is fixed to the upper end of the front part of the first frame 11, and the rear end of the third frame 13 is fixed to the upper end of the second frame 12. The third frame 13 is disposed above the case 2 and constitutes the upper plate part of the frame 10. The third frame 13 is disposed so that there is a small gap between it and the case 2.

[0023] The third frame 13 of the frame 10 has a notch 15 formed therein. The cutout portion 15 is formed so that its left and right ends reach the vicinity of the left and right ends of the third frame 13, its front end is located near the front end of the case 2, and its rear end is located approximately in the center of the front and rear of the case 2. The boundary portion between the front end of the cutout portion 15 in the third frame 13 is formed to be positioned slightly lower than other portions, and is configured as the portion (mounting portion 16) to which the support portion 31 of the adjustment portion 30 described later is attached via the operating portion 32.

[0024] The abutment portion 20 is provided at the other end of the movable core 8 outside (front) the case 2, and is arranged behind the front part of the first frame 11. The abutment portion 20 is configured in a rod shape, and is inserted into a through-hole formed in the movable core 8. Both ends of the abutment portion 20 protrude radially outward from the movable core 8, and are configured to abut against the front end of the spring 23.

[0025] The stopper 21 is provided at the other end of the movable iron core 8. The stopper 21 is disposed in front of the abutment portion 20 and behind the front part of the first frame 11. The stopper 21 is configured to abut against the front part of the first frame 11 when the movable iron core 8 moves forward a predetermined distance.

[0026] The protruding portion 22 is provided at the other end of the movable iron core 8. The protruding portion 22 is disposed in front of the stopper 21 and is configured integrally with the stopper 21. The protruding portion 22 is configured to be inserted into the through-hole 14 of the frame 10, and its front end portion protrudes forward beyond the front portion of the first frame 11. The front end portion of the protruding portion 22 is configured to be connectable to a connection object such as a valve body.

[0027] The spring 23 is a coil spring that biases the movable iron core 8 in the direction opposite (forward) from the fixed iron core 7. The spring 23 is fitted to the movable iron core 8 on the outside of the case 2, and is disposed between the case 2 and the frame 10. The front end of the spring 23 abuts against the abutment portion 20, and the rear end of the spring 23 abuts against the lid portion of the case 2.

[0028] In the solenoid 1 configured in this manner, the magnetic flux generated by energizing the coil 6 causes the movable core 8 to move rearward (toward the fixed core 7) against the biasing force of the spring 23. As the movable core 8 moves rearward, the protrusion 22 fixed to the movable core 8 also moves rearward, and the length of the protrusion 22 protruding from the first frame 11 becomes shorter. Then, as the movable core 8 moves rearward, one end (tip) of the movable core 8 comes into contact with the fixed core 7 within the cutout portion of the fixed core 7, and the rearward movement of the movable core 8 comes to a halt (see FIG. 5). Furthermore, when the current supply to the coil 6 is stopped, the movable core 8 moves forward (toward the opposite side from the fixed core 7) due to the biasing force of the spring 23. As the movable core 8 moves forward, the stopper 21 comes into contact with the front part of the first frame 11, and the forward movement of the movable core 8 comes to a halt (see FIG. 4). The solenoid 1 may also be configured such that the magnetic flux generated by energizing the coil 6 causes the movable core 8 to move forward (toward the opposite side from the fixed core 7).

[0029] The magnetic sensor 24 has directivity in the direction of detecting magnetic flux, and is composed of, for example, a linear Hall IC. The magnetic sensor 24 detects the movement state of the movable iron core 8 in the forward and backward directions by detecting changes in leakage magnetic flux from the coil 6 that occurs when current is passed through the coil 6, and outputs the result to a control device or the like (not shown) connected to the solenoid 1. The magnetic sensor 24 is provided on the frame 10 (third frame 13) via an adjustment unit 30, and is positioned above the movable iron core 8. The magnetic sensor 24 is positioned in the cutout portion 15 of the frame 10 so as to be spaced a predetermined distance from the movable iron core 8. The magnetic sensor 24 is positioned so that its magnetic sensing portion faces downward (toward the movable iron core 8). The magnetic sensor 24 is positioned so that the magnetic sensing direction α is approximately perpendicular to the movement direction of the movable iron core 8.

[0030] The adjustment unit 30 tilts the magnetic sensor 24 at an arbitrary angle (tilt forward or backward) to adjust the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle. The adjustment unit 30 tilts the magnetic sensor 24 at an angle along the movement direction of the movable iron core 8 to adjust the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle. The adjustment unit 30 fixes the magnetic sensor 24 at the arbitrary adjusted angle. The adjustment unit 30 is positioned above the movable iron core 8. The adjustment unit 30 is positioned at a position that does not overlap with the movement direction of the movable iron core 8.

[0031] In this way, since the adjustment unit 30 is provided to tilt the magnetic sensor 24 and adjust the magnetic sensing direction α of the magnetic sensor 24 to any angle, if the accuracy of detection of the movement state of the movable iron core 8 by the magnetic sensor 24 is poor, the adjustment unit 30 can be used to tilt the magnetic sensor 24 and adjust the magnetic sensing direction α of the magnetic sensor 24 to any angle, thereby making the range of detection threshold values ​​for the movement state of the movable iron core 8 by the magnetic sensor 24 appropriate. Therefore, the solenoid 1 can improve the accuracy of detecting the moving state of the movable core 8 (the position of the movable core 8).

[0032] The adjustment unit 30 includes a support portion 31 , an operating portion 32 , a pair of fulcrum portions 33 , a press portion 34 , and a screw 35 .

[0033] The support portion 31 of the adjustment unit 30 is a plate-shaped member made of an elastically deformable resin material, and supports the magnetic sensor 24. When tilting the magnetic sensor 24 to an arbitrary angle and adjusting the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle, the support portion 31 is tilted (tilted forward or backward) to the arbitrary angle. The support portion 31 is disposed above the third frame 13. The support portion 31 is disposed so as to leave a slight gap between it and the third frame 13. The support portion 31 is configured to cover the cutout portion 15. The magnetic sensor 24 is fixed to the underside of the support portion 31 (the surface on the movable iron core 8 side). A through-hole 31a is formed at the front end of the support portion 31, through which the body portion 32a of the operation unit 32 can be inserted.

[0034] The operating section 32 of the adjustment section 30 is operated by an operator when tilting the magnetic sensor 24 to a desired angle and adjusting the magnetic sensing direction α of the magnetic sensor 24 to a desired angle. The operating part 32 is formed, for example, by a screw, and includes a body 32a and a head 32b. A thread groove is formed on the outer peripheral surface of the body 32a of the operating part 32. The head 32b of the operating part 32 is configured in a shape that can be operated by an operator, and is formed according to the tool used by the operator, specifications, etc. For example, the head 32b of the operating part 32 may have a cross-shaped groove formed on its top surface, or may be configured in a hexagonal shape, etc. A hole 17 into which the operating unit 32 is fastened is formed in the mounting portion 16 of the third frame 13. A thread groove is formed on the inner circumferential surface of the hole 17 of the mounting portion 16 of the third frame 13 so that the body 32a of the operating unit 32 can be screwed onto it. The operating portion 32 is attached by being screwed into the hole 17 of the attachment portion 16 of the third frame 13 with its body portion 32 a inserted into the through-hole 31 a of the support portion 31 .

[0035] The fulcrum portion 33 of the adjustment unit 30 serves as a fulcrum when the support unit 31 tilts to tilt the magnetic sensor 24 at an arbitrary angle and adjusts the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle. The fulcrum portion 33 is provided on the upper surface of the third frame 13. The fulcrum portion 33 is configured to protrude upward from the upper surface of the third frame 13. The fulcrum portion 33 is configured in a substantially hemispherical shape. The fulcrum portion 33 is located at the midpoint between the front and rear of the support unit 31. The fulcrum portion 33 is located slightly forward (toward the operation unit 32) of the front-rear center of the support unit 31. The pair of fulcrum portions 33, 33 are located on the left and right sides near the cutout portion 15 of the third frame 13. The fulcrum portion 33 is located below the support unit 31. The upper end of the fulcrum portion 33 is in contact with the lower surface of the support unit 31.

[0036] The pressing portion 34 of the adjustment unit 30 is configured to be elastically deformable, and presses (presses) the rear end of the support unit 31 downward (toward the side where the movable iron core 8 is located). The pressing portion 34 is fixed to the upper surface of the third frame 13 with screws 35. The pressing portion 34 is configured by bending a flat metal member. The pressing portion 34 is configured by bending each of the left and right ends upward, forming two notches from the front edge toward the rear, and forming a tongue-like portion between the two notches. The tongue-like portion of the pressing portion 34 is configured as a pressing body 34a. The left and right portions of the pressing portion 34 that are bent upward are configured as side wall portions 34b.

[0037] The pressing body 34a of the pressing part 34 has a rear end edge (base end) bent so as to be inclined forward and upward, and is formed in an arc shape with its front end (tip end) protruding downward so that its outer diameter side faces downward (towards the support part 31). The lower surface of the tip end of the pressing body 34a abuts against the upper surface of the rear end of the support part 31, and the pressing body 34a presses (presses) the support part 31 downward (towards where the movable iron core 8 is arranged).

[0038] The side walls 34b of the presser portion 34 are disposed on the left and right sides of the presser body a. The side walls 34b are configured so that their upper ends are located higher than the upper end of the presser body a. By configuring the side wall portion 34b in this manner, it is possible to prevent the pressing body 34a from being unintentionally deformed due to a foreign object coming into contact with the pressing body 34a, and thereby prevent the degree of pressing of the support portion 31 from becoming undesired.

[0039] In the adjustment unit 30 configured in this manner, by operating the operating unit 32 and changing the amount by which the operating unit 32 is screwed into the hole 17 of the third frame 13 to change the insertion depth of the operating unit 32 (change in the up and down direction), the support unit 31 can be tilted (tilted forward or backward) at any angle relative to the movement direction of the movable iron core 8, the magnetic sensor 24 can be tilted at any angle relative to the movement direction of the movable iron core 8, and the magnetic sensing direction α of the magnetic sensor 24 can be adjusted to any angle relative to the movement direction of the movable iron core 8. For example, the screwing amount of the operating part 32 into the hole 17 of the third frame 13 is reduced to decrease the insertion depth of the operating part 32, thereby separating the support part 31 from the movable iron core 8. At this time, the rear end of the support part 31 is pressed by the pressing body 34a of the pressing part 34, and the lower surface thereof abuts against the fulcrum part 33, so that the lower surface thereof is curved (deformed) to face slightly forward, and the part of the support part 31 where the magnetic sensor 24 is provided (the lower surface of the part of the support part 31 behind the fulcrum part 33) is tilted to face slightly forward. In this way, the magnetic sensing surface of the magnetic sensor 24 is tilted forward, and the magnetic sensing direction α of the magnetic sensor 24 is tilted forward (see FIG. 6). Alternatively, for example, the amount by which the operating part 32 is screwed into the hole 17 of the third frame 13 is increased to increase the insertion depth of the operating part 32 and bring the support part 31 closer to the movable iron core 8. At this time, the rear end of the support part 31 is pressed by the pressing body 34a of the pressing part 34, and the lower surface thereof abuts against the fulcrum part 33, so that the lower surface is curved (deformed) to face slightly backward, and the portion of the support part 31 where the magnetic sensor 24 is provided (the lower surface of the portion of the support part 31 behind the fulcrum part 33) is tilted to face slightly backward. In this way, the magnetic sensing surface of the magnetic sensor 24 tilts backward, and the magnetic sensing direction α of the magnetic sensor 24 tilts backward (see FIG. 7).

[0040] In this way, by operating the operating unit 32, the insertion depth of the operating unit 32 into the hole 17 of the third frame 13 is decreased, causing the support unit 31 to tilt in one of the movement directions of the movable iron core 8 (forward), thereby tilting the magnetic sensing direction α of the magnetic sensor 24 in one of the movement directions of the movable iron core 8 (forward); and by operating the operating unit 32, the insertion depth of the operating unit 32 into the hole 17 of the third frame 13 is increased, causing the support unit 31 to tilt in the other of the movement directions of the movable iron core 8 (rearward), thereby tilting the magnetic sensing direction α of the magnetic sensor 24 in the other of the movement directions of the movable iron core 8 (rearward), thereby adjusting the magnetic sensing direction α of the magnetic sensor 24 to any angle. Therefore, the solenoid 1 can improve the detection accuracy of the moving state of the movable iron core 8 (the position of the movable iron core 8) with a simple configuration. The magnetic sensor 24 is tilted at an arbitrary angle with respect to the moving direction of the movable iron core 8, and the magnetic sensing direction α of the magnetic sensor 24 is adjusted to an arbitrary angle, and the angle is fixed with adhesive or the like. By holding the movable core 8 in the solenoid 1 in this state, it is possible to maintain a state in which the detection accuracy of the moving state of the movable core 8 in the solenoid 1 is improved during use.

[0041] Furthermore, when the insertion depth of the operating part 32 into the hole 17 of the third frame 13 is decreased or increased by operating the operating part 32 in this manner, the rear end of the support part 31 is pressed by the pressing body 34a of the pressing part 34, and the fulcrum part 33 of the adjustment part 30 abuts against the support part 31 between the operating part 31 and the pressing body 34a of the pressing part 34 in the direction opposite to the direction in which the pressing part 34 presses the support part 31 (the side on which the movable iron core 8 is arranged), between the operating part 31 and the pressing body 34a of the pressing part 34. Therefore, for example, even if there is rattle between the support part 31 and the operating part 32 when the body 32a of the operating part 32 is inserted into the through hole 31a of the support part 31, the detection accuracy of the movement state of the movable iron core 8 (the position of the movable iron core 8) can be improved more reliably with a simple configuration.

[0042] By changing the inclination angle of the pressing body 34a of the pressing portion 34 of the adjustment portion 30 to change the shape, and also by changing (for example, by manual change) the arc-shaped shape of the tip of the pressing body 34a, the amount by which the operating portion 32 is screwed into the hole 17 of the third frame 13 can be changed to change the insertion depth of the operating portion 32 (change in the up and down direction), thereby inclining the support portion 31 at any angle (tilting forward or backward) and adjusting the magnetic sensing direction α of the magnetic sensor 24 to any angle relative to the movement direction of the movable iron core 8. For example, when the inclination angle of the presser body 34a of the presser portion 34 is reduced relative to the moving direction of the movable core 8, the support portion 31 is curved (deformed) so that its lower surface faces slightly forward, and the portion of the support portion 31 where the magnetic sensor 24 is provided (the lower surface of the portion behind the fulcrum portion 33 of the support portion 31) is inclined so as to face slightly forward. In this way, the magnetic sensing surface of the magnetic sensor 24 is inclined forward, and the magnetic sensing direction α of the magnetic sensor 24 is inclined forward. Furthermore, for example, when the degree of downward protrusion of the pressing body 34a of the pressing portion 34 is reduced, the support portion 31 is curved (deformed) so that its lower surface faces slightly backward, and the portion of the support portion 31 where the magnetic sensor 24 is provided (the lower surface of the portion behind the fulcrum portion 33 of the support portion 31) is tilted so that it faces slightly backward. In this way, the magnetic sensing surface of the magnetic sensor 24 tilts backward, and the magnetic sensing direction α of the magnetic sensor 24 tilts backward.

[0043] In this way, by changing the shape of the pressing body 34a of the pressing part 34, the support part 31 is tilted in one or the other of the movement directions of the movable core 8, so that the magnetic sensing direction α of the magnetic sensor 24 is tilted in one (forward) of the movement directions of the movable core 8, and the magnetic sensing direction α of the magnetic sensor 24 is tilted in the other (rearward) of the movement directions of the movable core 8. Therefore, it is possible to improve the detection accuracy of the movement state of the movable core 8 (the position of the movable core 8) with a simple configuration.

[0044] 8, the support part 31 of the adjustment part 30 has a recess 36 at its rear end. The cutout part 15 of the frame 10 has a protrusion 18 at its rear end that can be placed in the recess 36 of the support part 31. The left-right width of the protrusion 18 of the frame 10 is configured to be slightly smaller than the left-right width of the recess 36 of the support part 31 of the adjustment part 30. In the solenoid 1 configured in this manner, when the support part 31 of the adjustment part 30 is bent so that its underside faces slightly forward, if the left-right position of the support part 31 of the adjustment part 30 is not appropriate (center left-right), the support part 31 abuts against the frame 10 (convex part 18), and if the left-right position of the support part 31 of the adjustment part 30 is appropriate, the convex part 18 of the frame 10 is positioned within the concave part 36 of the support part 31 of the adjustment part 30. Because of this configuration, when the operating unit 32 is operated to tilt the support part 31 of the adjustment unit 30 to any angle, the convex part 18 of the frame 10 is guided into the concave part 36 of the support part 31 of the adjustment unit 30, and the left and right positions of the support part 31 can be set to an appropriate state with a simple configuration. In addition, the cutout portion 15 of the frame 10 can be configured to have a recess instead of the protrusion 18, and the support portion 31 of the adjustment portion 30 can be configured to have a protrusion instead of the recess 36, so that the inside of the protrusion of the support portion 31 can be positioned in the recess of the cutout portion 15.

[0045] The support portion 31 may be configured not to be elastically deformed. Furthermore, when adjusting the magnetic sensing direction α of the magnetic sensor 24 to a desired angle, the operation portion 32 may be inserted shallower or deeper into the hole 17 of the third frame 13 by operating the operation portion 32, so that the support portion 31 can be tilted in one or the other of the moving directions of the movable core 8 without deforming the support portion 31 by utilizing a slight gap between the through hole 31 a of the support portion 31 and the body portion 32 a of the operation portion 32 (play between the through hole 31 a of the support portion 31 and the body portion 32 a of the operation portion 32).

[0046] Next, the solenoid shown in Figures 9 to 13 will be described. In the following description of the solenoid shown in Figures 9 to 13, the description of the same parts as in Figures 1 to 8 will be omitted as appropriate, and the description will focus on the parts that are different from Figures 1 to 8.

[0047] As shown in Figures 9 to 13, the solenoid 1 includes a case 2, a coil 6, a fixed iron core 7, a movable iron core 8, a frame 10, a contact portion 20, a stopper 21, a protrusion 22, a magnetic sensor 24, and an adjustment portion 30.

[0048] The frame 10 is disposed outside the case 2, the coil 6, and the movable iron core 8. The frame 10 is formed by bending a flat plate-like member so that it is roughly J-shaped in side view. The frame 10 is roughly square-shaped in side view, with the front (near the front end) and rear portions cut out from the rear end of the upper portion, leaving the upper portion open. The frame 10 is composed of a lower portion, a front portion connected to the front end of the lower portion and extending upward from the front end of the lower portion, and an upper portion connected to the upper end of the front portion and extending rearward from the upper end of the front portion.

[0049] The magnetic sensor 24 is attached to the frame 10 via an adjustment part 30 (support part 31) and is disposed above the movable iron core 8. The magnetic sensor 24 is disposed in a cutout portion at the top of the frame 10 so as to leave a predetermined distance between the magnetic sensor 24 and the movable iron core 8.

[0050] The adjustment unit 30 tilts the magnetic sensor 24 at an arbitrary angle (tilt forward or backward) to adjust the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle. The adjustment unit 30 tilts the magnetic sensor 24 at an angle along the movement direction of the movable iron core 8 to adjust the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle. The adjustment unit 30 fixes the magnetic sensor 24 at the arbitrary adjusted angle. The adjustment unit 30 is positioned above the movable iron core 8. The adjustment unit 30 is positioned at a position that does not overlap with the movement direction of the movable iron core 8.

[0051] In this way, since the adjustment unit 30 is provided to tilt the magnetic sensor 24 and adjust the magnetic sensing direction α of the magnetic sensor 24 to any angle, if the accuracy of detection of the movement state of the movable iron core 8 by the magnetic sensor 24 is poor, the adjustment unit 30 can be used to tilt the magnetic sensor 24 and adjust the magnetic sensing direction α of the magnetic sensor 24 to any angle, thereby making the range of detection threshold values ​​for the movement state of the movable iron core 8 by the magnetic sensor 24 appropriate. Therefore, the solenoid 1 can improve the accuracy of detecting the moving state of the movable core 8 (the position of the movable core 8).

[0052] The adjustment unit 30 includes a support unit 31 , an operating unit 32 , and an adjustment body 37 .

[0053] The support portion 31 of the adjustment portion 30 is a plate-shaped member made of a resin material, and supports the magnetic sensor 24. When tilting the magnetic sensor 24 to an arbitrary angle and adjusting the magnetic sensing direction α of the magnetic sensor 24 to an arbitrary angle, the support portion 31 is tilted to the arbitrary angle. The support portion 31 is placed in a cutout portion in the upper part of the frame 10. The support portion 31 is attached to an adjustment body 37. The magnetic sensor 24 is fixed to the underside of the support portion 31 (the surface on the movable iron core 8 side).

[0054] The operating part 32 of the adjustment part 30 is operated by an operator when tilting the magnetic sensor 24 to a desired angle and adjusting the magnetic sensing direction α of the magnetic sensor 24 to a desired angle. The operating part 32 is formed, for example, by a screw, and includes a body 32a and a head 32b. A thread groove is formed on the outer peripheral surface of the body 32a of the operating part 32. The rear end of the upper part of frame 10 is located forward of the center of the front-to-rear of the lower part. A hole 17 into which operating part 32 is fastened is formed in the upper part of frame 10. A thread groove is formed on the inner circumferential surface of hole 17 in the upper part of frame 10 so that body part 32a of operating part 32 can be screwed into it. The body 32a of the operating part 32 is inserted into the hole 17 of the frame 10. The operating part 32 is attached by screwing the body 32a into the hole 17 of the frame 10.

[0055] The adjustment body 37 of the adjustment unit 30 is fixed to the frame 10 via the case 2. The support part 31 is fixed to the adjustment body 37. The adjustment body 37 is configured to be elastically deformable. The adjustment body 37 is deformed when the operating part 32 is operated by an operator, tilting the magnetic sensor 24 (the support part 31 that supports the magnetic sensor 24) to any angle and adjusting the magnetic sensing direction α of the magnetic sensor 24 to any angle. The adjustment body 37 is formed into a roughly L-shape in side view by bending a flat metal member. The rear part of the fixed iron core 7 is inserted into the part extending downward of the adjustment body 37, and the adjustment body 37 is fixed to the case 2.

[0056] The forward-extending portion of the adjuster 37 is disposed in the notched portion in the upper part of the frame 10. The upper surface of the front end of the forward-extending portion of the adjuster 37 is configured to abut against the lower end of the body 32a of the operating unit 32 or the lower surface of the upper part of the frame 10, and the forward-extending portion of the adjuster 37 is configured to urge the lower end of the body 32a of the operating unit 32 or the lower surface of the upper part of the frame 10 upward. The left and right portions of the forward-extending portion of the adjusting body 37 are each bent upward, and then the upper portions are each bent inward. The inwardly bent portions of the forward-extending portion of the adjusting body 37 form an insertion portion 39. The insertion portion 39 is inserted into the upper end of the support portion 31, thereby attaching the support portion 31 to the upper surface of the adjusting body 37. The magnetic sensor 24 is attached to the adjusting body 37 via the support portion 31. A notch 38 is formed in the forward-extending portion of the adjuster 37. The notch 38 is formed in an elliptical shape with its longitudinal direction extending in the front-to-rear direction and is located approximately in the center of the forward-extending portion of the adjuster 37. The magnetic sensor 24 supported by the support part 31 is located within the notch 38 of the adjuster 37 and is disposed so as to protrude downward through the notch 38.

[0057] In the adjustment unit 30 configured in this manner, by operating the operating unit 32, the amount by which the operating unit 32 is screwed into the hole 17 of the frame 10 is changed to change the insertion depth of the operating unit 32 (change in the up and down direction), thereby tilting the support unit 31 at any angle (tilting forward or backward) with respect to the movement direction of the movable iron core 8, tilting the magnetic sensor 24 at any angle with respect to the movement direction of the movable iron core 8, and adjusting the magnetic sensing direction α of the magnetic sensor 24 to any angle with respect to the movement direction of the movable iron core 8. For example, the amount by which the operating part 32 is screwed into the hole 17 of the frame 10 is increased to increase the insertion depth of the operating part 32 and bring the support part 31 closer to the movable iron core 8. At this time, the lower end of the body 32a of the operating part 32 presses the forward-extending portion of the adjuster body 37 downward, causing the forward-extending portion of the adjuster body 37 and the boundary portion between the forward-extending portion and the downward-extending portion of the adjuster body 37 to bend downward (elastically deform), and the portion of the support part 31 where the magnetic sensor 24 is provided to tilt. In this way, the magnetic sensing surface of the magnetic sensor 24 tilts backward, and the magnetic sensing direction α of the magnetic sensor 24 tilts backward (see FIG. 13).

[0058] In this way, by operating the operating unit 32, the depth of insertion of the operating unit 32 into the hole 17 of the frame 10 can be made shallower or deeper, thereby changing the degree to which the operating unit 32 presses the adjustment body 37. Then, by changing the degree to which the operating unit 32 presses the adjustment body 37, the tilt angle of the support part 31 with respect to the moving direction of the movable iron core 8 is changed, and the tilt angle in the magnetic sensing direction α of the magnetic sensor 24 (the tilt angle in the magnetic sensing direction α with respect to the moving direction of the movable iron core 8) is changed, and the magnetic sensing direction α of the magnetic sensor 24 can be adjusted to any angle. Therefore, the solenoid 1 can improve the detection accuracy of the moving state of the movable iron core 8 (the position of the movable iron core 8) with a simple configuration. The magnetic sensor 24 is tilted at an arbitrary angle with respect to the moving direction of the movable iron core 8, and the magnetic sensing direction α of the magnetic sensor 24 is adjusted to an arbitrary angle, and the angle is fixed with adhesive or the like. By holding the movable core 8 in the solenoid 1 in this state, it is possible to maintain a state in which the detection accuracy of the moving state of the movable core 8 in the solenoid 1 is improved during use.

[0059] In this way, the adjusting body 37 is configured to be elastically deformable, and when adjusting the magnetic sensing direction α of the magnetic sensor 24 to a desired angle, the adjusting body 37 is elastically deformed by operating the operating unit 32 by the operator, thereby changing the tilt angle in the magnetic sensing direction α of the air sensor 24 (the tilt angle in the magnetic sensing direction α with respect to the moving direction of the movable iron core 8). Therefore, with a simple configuration, the magnetic sensing direction α of the magnetic sensor 24 can be tilted with respect to the moving direction of the movable iron core 8, and the magnetic sensing direction α of the magnetic sensor 24 can be adjusted to a desired angle. [Explanation of symbols]

[0060] 1 solenoid 2 cases 3 Insertion hole 6 coils 7 Fixed core 8 moving core 10 frames 14 Through holes 15 Notch 16 Mounting part 17 Hole 20 Contact part 21 Stopper 22 Protrusion 23 Spring 24 Magnetic Sensor 30 Adjustment part 31 Support part 32 Operation section 33 Fulcrum 34 Presser foot 37 Regulator 38 Notch 39 Insertion section

Claims

1. A coil and a movable core that moves when current is applied to the coil; a magnetic sensor that detects a change in leakage magnetic flux from the coil caused by energizing the coil, thereby detecting a moving state of the movable core; and an adjustment unit that tilts the magnetic sensor to adjust the magnetic sensing direction of the magnetic sensor to an arbitrary angle. Solenoid.

2. a frame disposed outside the movable core; The adjustment unit is an operating unit that is operated when adjusting the magnetic sensing direction of the magnetic sensor to an arbitrary angle; an adjustment body to which the magnetic sensor is attached; Equipped with the frame includes a hole; The operation unit is attached by being inserted through the hole of the frame, The adjuster is fixed to the frame, By operating the operating unit, the insertion depth of the operating unit into the hole of the frame is made shallower or deeper to change the degree of pressure applied to the adjusting body by the operating unit, thereby adjusting the magnetic sensing direction of the magnetic sensor to an arbitrary angle. The solenoid of claim 1 .

3. the adjusting body is configured to be elastically deformable, and when adjusting the magnetic sensing direction of the magnetic sensor to an arbitrary angle, the adjusting body is deformed by operating the operating unit by an operator, thereby adjusting the magnetic sensing direction of the magnetic sensor to an arbitrary angle. The solenoid of claim 2.

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