JP2008256489A - Instrument device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instrument device having a saved space, capable of improving indication accuracy of a pointer. <P>SOLUTION: A speedometer 8 has a magnetic assembly 3 wherein each magnet 32 whose positive pole N and negative pole S are arranged in an alignment direction along an orthogonal direction C is aligned plurally at equal intervals along an extending direction B; and a moving body 2 to which the pointer 7 is attached, having a pair of electromagnets moving on the magnetic assembly 3. The pair of electromagnets has respectively a U-shaped core having a first electrode part facing to one magnetic pole of each magnet 32 along the orthogonal direction C and forming a magnetic pole, a second electrode part facing to the other magnetic pole of each magnet 32 along the orthogonal direction C and forming a magnetic pole, and a connection part for connecting the first electrode part to the second electrode part, and is aligned at an interval mutually along the extending direction B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an instrument device that displays a measured amount when instructed by a pointer, and more particularly to an instrument device that uses a linear motor in a drive system.

For example, as a centerless type meter used for a vehicle combination meter or the like, a pointer arranged on the front side of the dial is connected to an annular or arc-shaped ring gear arranged on the back side of the dial, and a motor is used. The ring gear is slid on the extension line to move the pointer (for example, Patent Document 1), or the pointer is connected to a loop member such as a belt or a ball chain disposed on the back side of the dial instead of the ring gear. In some cases, the loop member is driven by a motor or pulley to move the pointer (for example, Patent Documents 2 and 3).
JP 2000-1331099 A JP 2005-91032 A JP 2005-106588 A

  Since all of the conventional centerless type meters described above transmit the power of the rotary motor to this pointer through a power transmission mechanism that contacts the pointer, such as a ring gear or a loop member, these power transmission mechanisms There is a problem in that the operation of the pointer is not smooth due to the slack and catching, and the instruction accuracy may be reduced.

  In addition, since all of the conventional centerless type meters described above require many parts such as a rotary motor that requires a large mounting space, a bearing, and a pulley for absorbing slack in the loop member, There has been a problem that the mounting space for parts becomes large and the cost becomes high.

  Accordingly, an object of the present invention is to provide a space-saving instrument device that can improve the indication accuracy of a pointer.

  In order to achieve the above-mentioned object, the invention described in claim 1 is directed to a dial plate in which a display unit such as scales and numerals extends from one end to the other end, and indicates the display unit according to a measurement amount. And a moving mechanism for moving the pointer, wherein the moving mechanism is arranged in a direction in which the positive electrode and the negative electrode are arranged along an orthogonal direction orthogonal to the extending direction of the display unit. A magnet assembly in which a plurality of magnets are arranged at equal intervals along the extending direction, and a positive electrode of each magnet is adjacent to a negative electrode of an adjacent magnet, and the plurality of magnets are aligned, and the pointer is An attached case and a pair of electromagnets disposed in the case, and moves on the magnet assembly along the extending direction by switching a voltage application direction to the electromagnet. Switch the direction of application to the moving body and the electromagnet. Applying means for applying a voltage in a possible manner, and the pair of electromagnets are respectively opposed to one magnetic pole of the magnet along the orthogonal direction and form a magnetic pole; and A second electrode portion facing the other magnetic pole of the magnet along the orthogonal direction and forming the magnetic pole; and a connecting portion connecting the first electrode portion and the second electrode portion and having a coil wound thereon. It is an instrument apparatus characterized by having the core which has, and being arranged mutually spaced along the extension direction.

  The invention described in claim 2 is the invention described in claim 1, wherein the moving body is a plurality of wheels rotatably attached to the case, wherein the extension direction and the orthogonal direction are A plurality of wheels sliding on the magnet assembly mounted at positions sandwiching the magnet assembly between each other along a third direction orthogonal to both, and the plurality of wheels as the magnet assembly Biasing means for biasing toward the head.

  According to the first aspect of the present invention, since the linear motor drive type moving mechanism is provided, a measuring instrument device having a simple indication, a small space, and a pointing device that operates smoothly can be provided. be able to. The pair of electromagnets constituting the moving body are respectively opposed to one magnetic pole of the magnet along the orthogonal direction and form a magnetic pole, the other magnetic pole of the magnet, and the A core having a second electrode part facing along the orthogonal direction and forming a magnetic pole; and a connecting part that connects the first electrode part and the second electrode part and is wound with a coil; In addition, since the pair of electromagnets are arranged at intervals along the extending direction, even if the attractive force / repulsive force of the pair of electromagnets to the magnet changes, the moving body extends without shaking. Since it moves smoothly along the direction, it is possible to provide an instrument device that can further improve the pointing accuracy of the pointer.

  According to the invention described in claim 2, the moving body is a plurality of wheels rotatably attached to the case, and is in a third direction orthogonal to both the extending direction and the orthogonal direction. Since it has a plurality of wheels that slide on the magnet assembly that is attached at a position that sandwiches the magnet assembly between each other, the friction resistance between the case and the magnet assembly is reduced. The moving body can be moved with a small force. In addition, since the moving body includes a biasing unit that biases the plurality of wheels toward the magnet assembly, the third direction generated between the magnet assembly and the case. The play in the direction along the line is absorbed, and the movement of the moving body can be made smooth. Therefore, the indication accuracy of the pointer can be improved.

  Hereinafter, an instrument device according to an embodiment of the present invention will be described with reference to FIGS. A speedometer 8 as an instrument device according to the present embodiment is mounted on a vehicle such as an automobile, and constitutes a vehicle combination meter 1 that displays the state of the vehicle to passengers of the vehicle.

  As shown in FIGS. 1 and 2, the vehicle combination meter 1 includes a meter case 10, a speedometer 8 attached to the meter case 10, and a liquid crystal display 9 attached to the meter case 10. Have. The liquid crystal display 9 displays various information such as travel distance information, navigation information, and shift position information.

  The meter case 10 is made of synthetic resin or the like, and is formed in a semicircular box shape in plan view that opens to the side facing the occupant. A dial 6 (described later) of the speedometer 8 is fitted in such a manner as to close the opening, and the moving mechanism 5 (described later) of the speedometer 8 or the liquid crystal display is disposed in the meter case 10, that is, between the meter case 10 and the dial 6. 9 etc. are accommodated.

  The speedometer 8 is a meter that displays the speed of the vehicle. The dial 6 on which the display unit 63 is printed, the pointer 7 that instructs the display unit 63 according to the measurement amount, and the movement that moves the pointer 7. And a mechanism 5.

  The dial 6 is formed in a semicircular plate shape in plan view, and a through window 64 formed in a semicircular shape in plan view is formed at the center. Further, the center of curvature of the edge portion of the dial 6 that forms the arc shape and the center of curvature of the edge portion of the through-window 64 that forms the arc shape coincide with each other. The penetrating window 64 positions one end of a pointer 7 attached to a case 21 (described later) of the moving mechanism 5 on the front side (occupant compartment side) of the dial 6 and exposes the liquid crystal display 9 to the occupant. That is, the liquid crystal display 9 is arranged at a position overlapping the through window 64 along the depth direction (indicated by arrow C in FIG. 1) of the vehicle combination meter 1.

  The display portion 63 printed on the surface of the dial 6 on the passenger compartment side is constituted by a scale portion 61 and a number portion 62, and extends in an arc shape outside the through window 64. Further, the center of curvature of the display unit 63 coincides with the center of curvature of the edge of the through-window 64 that forms the arc shape. Further, the direction in which the display unit 63 extends is referred to as “extending direction” in the present invention, and is represented by an arrow B. Further, the “depth direction C” described above is orthogonal to the extending direction B. This “depth direction C” is also expressed as “orthogonal direction C” in the present invention.

  The pointer 7 is formed in a conical shape that gradually narrows from one end to the other end in the longitudinal direction, and is attached to a case 21 described later of the moving mechanism 5. Further, the pointer 7 is positioned on the front side (passenger compartment side) of the dial 6 through the above-described through window 64 at the connecting portion with the case 21. The pointer 7 moves along the extending direction B in a state where the one end is positioned on the center side of the dial 6 and the other end is positioned on the outside of the dial 6. Instruct.

  The moving mechanism 5 includes a magnet assembly 3 attached in the meter case 10, a moving body 2 that moves on the magnet assembly 3 along the extending direction B, and an FPC (Flexible Printed) as application means. Circuit) 4.

  The magnet assembly 3 is made of synthetic resin, and has a frame portion 30 attached to the inner surface of the meter case 10 and a plurality of magnets 32 fitted into the frame portion 30.

  As shown in FIG. 5, the frame part 30 includes an arcuate part 30 a formed in an arcuate shape, and a linear part 30 b formed in a linear shape and connecting one end and the other end of the arcuate part 30 a. Have. The center of curvature of the arc-shaped portion 30a coincides with the center of curvature of the edge portion forming the arc shape of the through window 64. Further, the arc-shaped portion 30a is opposed to the curved surface portion located on the upper side in FIG. Moreover, the linear part 30b is contact | abutting to the bottom part located in the lower side in FIG. The liquid crystal display 9 described above is positioned in the central space of the frame portion 30.

  The plurality of magnets 32 are attached to the arcuate portion 30a in a state of being arranged at equal intervals along the extending direction B. In addition, each magnet 32 is attached such that its positive electrode N and its negative electrode S are aligned along the orthogonal direction C. The plurality of magnets 32 are arranged such that the positive electrode N of each magnet 32 is adjacent to the negative electrode S of the adjacent magnet 32.

  As shown in FIG. 3, the movable body 2 includes a case 21 made of synthetic resin, a pointer attachment member 26 formed integrally with the pointer 7 attached to the case 21, and three wheels 24A, 24B, 24C, the winding spring 27 as an urging means, and a pair of electromagnets 20A and 20B arranged in the case 21.

  The case 21 includes a main body case 21a in which an accommodation space for accommodating the pair of electromagnets 20A and 20B is formed, and a cover portion 21b that sandwiches the pair of electromagnets 20A and 20B between the main body case 21a. Yes. In addition, four slits 25 for drawing the end of the FPC 4 into the case 21 are formed at the edge of the main body case 21a on the side where the cover portion 21b is attached. As shown in FIG. 1, the end portion of the FPC 4 is passed through the slit 25 and drawn into the case 21 so as to be sandwiched between the main body case 21 a and the cover portion 21 b.

  The pointer attaching member 26 includes a U-shaped portion 26a that matches the case 21 and a pointer connecting portion 26b. The U-shaped portion 26a extends along the longitudinal direction of the pointer 7, and a pair of plate-like portions 262 and 263 facing each other and a connecting plate in which one end portions of the pair of plate-like portions 262 and 263 are connected to each other. The portion 261 is formed in a U shape in plan view. The pointer connecting portion 26b is connected to the other end portion of the one plate-like portion 263 and extends in a direction away from the other plate-like portion 262, and the end portion on the side away from the one plate-like portion 263 is the pointer. 7 is connected to the one end.

  In such a state where the pointer 2 is attached to the magnet assembly 3, the pair of plate-like portions 262 and 263 face each other along the orthogonal direction C, and the connecting plate portion 261 and the pointer connecting member 26 are connected to each other. The longitudinal direction of the portion 26b coincides with the orthogonal direction C, and the longitudinal direction of the pair of plate-like portions 262 and 263 is a third direction (indicated by an arrow D in FIG. 1) perpendicular to both the extending direction B and the orthogonal direction C. Match). That is, the pointer 7 is attached to the case 21 so that the longitudinal direction thereof coincides with the third direction D.

  In the present embodiment, since the extending direction B is an arc direction, the “third direction D” is a direction from the center of curvature of the dial 6 toward the edge having the arc shape described above. .

  The three wheels 24A, 24B, and 24C have a wheel portion 22 that rotates with the orthogonal direction C as the rotation axis direction, and an axle 23 that rotatably attaches the wheel portion 22 to the main body case 21a or the pointer attachment member 26. is doing. Of such three wheels 24A, 24B, 24C, two wheels 24A, 24B are respectively attached to both end portions along the extending direction B of the main body case 21a. The remaining one wheel 24 </ b> C is attached to the pointer attaching member 26 and is attached between the other end portions of the pair of plate-like portions 262 and 263.

  The mobile body 2 having such three wheels 24A, 24B, and 24C has a shape in which the frame portion 30 is sandwiched between the two wheels 24A and 24B and the one wheel 24C along the third direction D. The magnet assembly 3 is movably attached. When the moving body 2 moves between one end and the other end of the frame portion 30 along the extending direction B, these three wheels 24A, 24B, and 24C slide on the surface of the frame portion 30. As a result, the frictional resistance between the case 21 and the frame portion 30 is reduced. Therefore, the moving body 2 can be moved with a small force.

  As shown in FIG. 3, the winding spring 27 is disposed between the connecting plate portion 261 of the pointer attaching member 26 and the case 21 in a direction in which the expansion / contraction direction coincides with the third direction D. . The three wheels 24 </ b> A, 24 </ b> B, and 24 </ b> C described above are pressed toward the frame portion 30 by the elastic force of the winding spring 27. That is, the winding spring 27 urges the three wheels 24 </ b> A, 24 </ b> B, and 24 </ b> C toward the frame portion 30. As a result, the play in the direction along the third direction D generated between the frame portion 30 and the case 21 is absorbed. Therefore, the operation of the moving body 2 can be made smooth, and the indication accuracy of the pointer 7 can be improved.

  As shown in FIGS. 3 and 4, the pair of electromagnets 20A and 20B includes cores 28A and 28B each formed by punching out an iron plate into a predetermined shape and stacking them together, and the core 28A. , 28B between each other, a bobbin 29 composed of a pair of clamping members 29a, 29b, a coil 14 wound around the outer periphery of the bobbin 29, a pair connecting the coil 14 and the end of the FPC 4 Lead portion 15.

  The cores 28A and 28B include first electrode portions 11A and 11B and second electrode portions 12A and 12B facing each other, and a connecting portion 13A connecting the first electrode portions 11A and 11B and the second electrode portions 12A and 12B. , 13B, and a U-shape in plan view.

  The pair of sandwiching members 29a and 29b sandwich the connecting portions 13A and 13B between each other. Further, the pair of lead portions 15 are press-fitted and held in one clamping member 29a. The coil 14 is positioned on the outer periphery of the connecting portions 13A and 13B by being wound around the outer periphery of the bobbin 29. Further, the end portion of the coil 14 is connected to the lead portion 15.

  Such a pair of electromagnets 20A and 20B is shown in FIGS. 7 and 8 in the first electrode portions 11A and 11B and the second electrode portions 12A and 12B when an AC voltage is applied to the coil 14 via the FPC 4. Thus, the magnetic poles S and N whose polarities are periodically switched are formed.

  Further, as shown in FIG. 6, each of the pair of electromagnets 20 </ b> A and 20 </ b> B includes a second electrode while the first electrode portions 11 </ b> A and 11 </ b> B are opposed to one magnetic pole of the magnet 32 along the orthogonal direction C. The portions 12A and 12B are accommodated in the case 21 with the other magnetic pole of the magnet 32 facing the orthogonal direction C, that is, with the magnet 32 straddling the orthogonal direction C. The pair of electromagnets 20A and 20B are accommodated in the case 21 in a state where they are arranged at intervals along the extending direction B, as shown in FIGS.

  One end of the FPC 4 is drawn into the case 21 and connected to the lead portion 15 as described above, and the other end is connected to a power supply device such as a microcomputer (not shown). Further, the FPC 4 is provided with a surplus length corresponding to the amount of movement of the moving body 2, and the surplus length portion is accommodated in the meter case 10 as shown in FIG. As a result, the FPC 4 follows the moving operation of the moving body 2 that moves between one end and the other end of the frame portion 30, so that power can be constantly supplied to the pair of electromagnets 20 </ b> A and 20 </ b> B.

  FIG. 7 shows a waveform diagram of AC voltage applied to the pair of electromagnets 20A and 20B via the FPC 4. The horizontal axis in the waveform diagram of FIG. 7 indicates time, and the vertical axis indicates voltage. Further, FIG. 7 shows a waveform diagram of an AC voltage when the moving body 2, that is, the pointer 7 is moved from the 0 side to the 160 side of the display unit 63 shown in FIG. As shown in FIG. 7, the alternating voltage applied to the pair of electromagnets 20A and 20B is a sine wave whose phases are shifted by 90 °, and the first electrode portions 11A and 11B are energized when the sine wave is energized. The magnetic poles formed on the second electrode portions 12A and 12B have opposite polarities.

  As shown in FIG. 7, the voltage applied to the electromagnet 20A peaks on the plus side at the timings t0 and t8, peaks on the minus side at the timing of t4, and becomes zero at the timings of t2 and t6. Therefore, in the electromagnet 20A, the magnetic force of each electrode portion 11A, 12A is maximized at timings t0, t4, t8, and the magnetic poles formed on the electrode portions 11A, 12A disappear at timings t2, t6. . That is, the magnetic force of each electrode portion 11A, 12A disappears.

  Also, as shown in FIG. 7, the voltage applied to the electromagnet 20B peaks on the plus side at the timing t2, peaks on the minus side at the timing t6, and becomes zero at the timings t0, t4, and t8. Therefore, in the electromagnet 20B, the magnetic force of the electrode portions 11B and 12B becomes maximum at the timings t2 and t6, and the magnetic poles formed on the electrode portions 11B and 12B disappear at the timings t0, t4, and t8. . That is, the magnetic force of each electrode part 11B and 12B lose | disappears.

  FIG. 8 is an explanatory diagram schematically showing the positional relationship between the magnet assembly 3 and the moving body 2 for each time based on the waveform diagram of FIG. Further, in FIG. 8, the left side in the paper plane direction corresponds to the 0 side of the display unit 63 shown in FIG. 1, and the right side in the paper plane direction corresponds to the 160 side of the display unit 63 shown in FIG. In FIG. 8, the coil 14 and the like constituting the electromagnets 20A and 20B are omitted.

  As shown in FIG. 8, at the timing of t0, the electromagnet 20A has the negative electrode S formed on the first electrode portion 11A and the positive electrode N formed on the second electrode portion 12A. Moreover, the magnetic force of these electrode parts 11A and 12A is the maximum. The electromagnet 20B is in a state where the magnetic poles of both electrode portions 11B and 12B have disappeared. With such a magnetic field arrangement, the first electrode portion 11A (S) of the electromagnet 20A is opposed to the central portion along the extending direction B of the positive electrode N of the magnet 32 located at the left end of the four magnets 32. The second electrode portion 12A (N) of the electromagnet 20A is opposed to the central portion along the extending direction B of the negative electrode S of the magnet 32, and is between the second magnet 32 from the left and the third magnet 32 from the left. The electrode portions 11B and 12B of the electromagnet 20B are positioned. In this state, in the electromagnet 20A and the electromagnet 20B, the magnetic force of the electromagnet 20A, that is, the attractive force to the magnet 32 is larger than that of the electromagnet 20B, but the first electrode portion 11A (S) attracts the magnet 32 to the positive electrode N. Since the force and the attractive force of the second electrode portion 12A (N) to the negative electrode S of the magnet 32 are balanced, the electromagnet 20A does not contact the magnet 32. For this reason, the pair of electromagnets 20 </ b> A and 20 </ b> B is not displaced along the orthogonal direction C. That is, the moving body 2 moves only along the extending direction B and does not shake along the orthogonal direction C.

  Also, from t0 to t1, the electromagnet 20A maintains the polarity of both electrode portions 11A and 12A, and the electromagnet 20B has the negative electrode S formed on the first electrode portion 11B and the positive electrode N formed on the second electrode portion 12B. Is done. And at the timing of t1, the magnetic force of the electromagnet 20A and the magnetic force of the electromagnet 20B are equal. With such a magnetic field arrangement, the first electrode portion 11A (S) of the electromagnet 20A is opposed to the right end along the extending direction B of the positive electrode N of the magnet 32 positioned at the left end, and the negative electrode S of the magnet 32 is disposed. The second electrode portion 12A (N) of the electromagnet 20A is opposed to the right end along the extending direction B, and the first electrode of the electromagnet 20B is located at the left end along the extending direction B of the positive electrode N of the third magnet 32 from the left. The part 11B (S) is opposed, and the second electrode part 12B (N) of the electromagnet 20B is opposed to the left end along the extending direction B of the negative electrode S of the magnet 32. Further, the negative electrode S is formed on the first electrode portion 11B of the electromagnet 20B, and the positive electrode N is formed on the second electrode portion 12B. That is, the electromagnet 20B generates a repulsive magnetic field between the second magnet 32 from the left. By forming, the moving body 2 moves to the right side (that is, the side away from the second magnet 32 from the left) along the extending direction B.

  Further, from t1 to t2, the electromagnet 20B retains the polarity of both electrode portions 11B and 12B, and the electromagnet 20A loses the magnetic poles of both electrode portions 11A and 12A. With such a magnetic field arrangement, at the timing of t2, the electrode portions 11A and 12A of the electromagnet 20A are positioned between the magnet 32 located at the left end and the second magnet 32 from the left, and the third magnet 32 from the left. The first electrode portion 11B (S) of the electromagnet 20B is opposed to the central portion along the extending direction B of the positive electrode N, and the electromagnet 20B is disposed at the central portion along the extending direction B of the negative electrode S of the magnet 32. The second electrode portions 12B (N) are opposed to each other. In this state, in the electromagnet 20A and the electromagnet 20B, the magnetic force of the electromagnet 20B, that is, the attractive force to the magnet 32 is larger than that of the electromagnet 20A, but the first electrode portion 11B (S) attracts the magnet 32 to the positive electrode N. Since the force and the attractive force of the second electrode portion 12B (N) to the negative electrode S of the magnet 32 are balanced, the electromagnet 20B does not contact the magnet 32. For this reason, the pair of electromagnets 20 </ b> A and 20 </ b> B is not displaced along the orthogonal direction C. That is, the moving body 2 moves only along the extending direction B and does not shake along the orthogonal direction C. Further, from t1 to t2, the magnetic force of the electromagnet 20B becomes larger than the magnetic force of the electromagnet 20A, so that the first electrode portion 11B (S) of the electromagnet 20B has the highest positive electrode N of the third magnet 32 from the left. While being attracted to a position facing the central portion along the extending direction B, which is the position of the magnetic force, the second electrode portion 12B (N) of the electromagnet 20B is the most among the negative electrodes S of the third magnet 32 from the left. It is attracted to a position facing the central portion along the extending direction B, which is a position of high magnetic force. Accordingly, the moving body 2 moves along the extending direction B to the right side (that is, the side approaching the third magnet 32 from the left).

  In this way, the moving body 2 moves on the frame 30 of the magnet assembly 3 with one period from t0 to t8. Further, the distance that the moving body 2 moves in this one cycle is a distance of “2X + 2Y”, where X is the width along the extending direction B of one magnet 32 and Y is the distance between adjacent magnets 32. It becomes. The distance from the center of one electromagnet 20A along the extending direction B to the center of the other electromagnet 20B is “(2X + 2Y) × 3/4”.

  When the phase of the AC voltage applied to the electromagnet 20A is delayed by 90 ° from the phase of the AC voltage applied to the electromagnet 20B, the moving body 2 moves in the direction opposite to the direction shown in FIG. That is, the moving body 2 moves from the 160 side to the 0 side of the display unit 63 shown in FIG.

  According to the present embodiment, since the linear motor drive type moving mechanism 5 is provided, the configuration is simple and space-saving, and the vehicle has the speedometer 8 with good indication accuracy with which the pointer 7 operates smoothly. A combination meter 1 can be provided. In addition, since the speedometer 8 has a space-saving configuration, the vehicle combination meter 1 having a high degree of freedom in layout, such as disposing the liquid crystal display 9 in the central space of the frame portion 30, can be provided. In addition, since the movement locus of the pointer 7 can be easily changed by changing the arrangement of the magnets 32, the degree of freedom in layout and the degree of freedom in design can be further improved.

  In addition, since the pair of electromagnets 20A and 20B straddles the magnet 32 along the orthogonal direction C, the pair of electromagnets 20A and 20B are accommodated in the case 21 at intervals along the extending direction B. , 20B even if the attractive force / repulsive force to the magnet 32 changes, the moving body 2 moves smoothly along the extending direction B without shaking, so that the indication accuracy of the pointer 7 can be further improved. A vehicle combination meter 1 can be provided.

  In addition, since the moving body 2 includes a plurality of wheels 24A, 24B, and 24C, the frictional resistance between the case 21 and the magnet assembly 3 can be reduced, and the moving body 2 is moved with a small force. be able to. Further, since the plurality of wheels 24A, 24B, and 24C are provided with the winding spring 27 that urges the plurality of wheels 24A, 24B, and 24C toward the magnet assembly 3, the third direction D generated between the magnet assembly 3 and the case 21 is provided. The play in the direction along the line is absorbed, and the movement of the moving body 2 can be made smooth. Therefore, the indication accuracy of the pointer 7 can be further improved.

  In the above-described embodiment, the speedometer 8 in which the display unit 63 extends in an arc shape has been described as an example. However, the present invention is also applied to, for example, an instrument device in which the display unit extends in a linear shape. be able to.

  In the above-described embodiment, the speedometer 8 mounted on the vehicle has been described as an example. However, the present invention is not limited to the instrument device for the vehicle but may be applied to an instrument device used in other fields. Can do.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a perspective view which shows the instrument apparatus concerning one embodiment of this invention. FIG. 2 is a plan view of the instrument device shown in FIG. 1. It is an exploded view of the moving body of the instrument apparatus shown by FIG. It is an exploded view of the electromagnet of the moving body shown in FIG. FIG. 2 is a plan view of a magnet assembly of the instrument device shown in FIG. 1. It is sectional drawing along the AA line in FIG. It is a wave form diagram of the voltage applied to the electromagnet shown by FIG. It is explanatory drawing which showed typically the positional relationship of the magnet assembly and moving body for every time based on the waveform diagram shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle combination meter 2 Moving body 3 Magnet assembly 4 FPC (application means)
5 Movement mechanism
6 Dial 7 Pointer 8 Speedometer (instrument device)
11A, 11B 1st electrode part 12A, 12B 2nd electrode part 13A, 13B Connection part 20A, 20B Electromagnet 21 Case 24A, 24B, 24C Wheel 27 Winding spring (biasing means)
28A, 28B Core 32 Magnet 63 Display part B Extension direction C Orthogonal direction D Third direction

Claims (2)

An instrument device having a dial plate with a display unit such as scales and numerals extending from one end to the other end, a pointer that instructs the display unit according to a measurement amount, and a moving mechanism that moves the pointer There,
The moving mechanism is
Magnets arranged in a direction in which the positive electrode and the negative electrode are arranged along an orthogonal direction orthogonal to the extending direction of the display unit are arranged at a plurality of equal intervals along the extending direction, and the positive electrodes of the magnets are adjacent to each other. A magnet assembly in which the plurality of magnets are arranged adjacent to the negative electrode of the matching magnets;
A case having the pointer attached thereto and a pair of electromagnets disposed in the case, and a direction in which a voltage is applied to the electromagnet is switched so that the magnet assembly is moved along the extending direction. A moving object that moves
Application means for applying a voltage to the electromagnet so that the application direction can be switched, and
The pair of electromagnets
A first electrode portion that faces the one magnetic pole of the magnet along the orthogonal direction and forms a magnetic pole, and a second electrode portion that faces the other magnetic pole of the magnet along the orthogonal direction and forms a magnetic pole. A core having an electrode part, and a connecting part that connects the first electrode part and the second electrode part and is wound with a coil; and
An instrument device, wherein the instrument devices are arranged at intervals along the extending direction. The moving body is
A plurality of wheels rotatably attached to the case, and attached at positions where the magnet assembly is sandwiched between each other along a third direction orthogonal to both the extending direction and the orthogonal direction. A plurality of wheels sliding on the magnet assembly;
A biasing means for biasing the plurality of wheels toward the magnet assembly;
The instrument device according to claim 1, comprising:

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