JP7387523B2 - magnet fixture - Google Patents

Description

The present invention relates to a magnet fixture.

Patent Document 1 discloses a magnet fixture that is attached to the center of rotation of a pointer of a pressure gauge and holds a magnet for detecting the rotation angle of the pointer.

Utility model registration No. 3161399

However, since the magnet fixture disclosed in Patent Document 1 has a cover above the magnet, it is difficult to make the magnet fixture thin, and when the gap between the pointer of the pressure gauge and the transparent plate is narrow, Cannot be installed. In addition, the magnet fixture disclosed in Patent Document 1 cannot be universally installed on pointers of various sizes because the dimensions of each part must be adapted to a pointer having a specific size.

A magnet fixture according to one embodiment is a magnet fixture for fixing a magnet for rotation angle detection, which is attached to the rotation center of a pointer of an analog meter, and is provided on a main body and an upper surface of the main body. a magnet holding part that holds the magnet on the rotation center of the pointer, a slit part formed in a plane perpendicular to the rotation center in the main body part and in which the rotation center part of the pointer is accommodated; The rotating shaft holding part is provided on the lower side and holds the rotating shaft part of the pointer, and the pointer regulating part is provided so as to protrude outward from the outer peripheral edge of the main body part and regulates the rotation of the pointer with respect to the main body part.

According to one embodiment, a versatile thin magnet fixing device that can easily and reliably fix the magnet to the center of rotation of the pointer with the center of the magnet aligned with the center of rotation of the pointer. We can provide the ingredients.

External perspective view of a magnet fixture according to an embodiment A plan view of a magnet fixture according to an embodiment Side view of a magnet fixture according to one embodiment A front view of a magnet fixture according to an embodiment Bottom view of a magnet fixture according to one embodiment A perspective sectional view showing a cross section taken along the AA cross section line of a magnet fixture according to an embodiment Exploded perspective view of a structure according to one embodiment A diagram for explaining a method of attaching a magnet fixture according to an embodiment A diagram for explaining a method of attaching a magnet fixture according to an embodiment A diagram for explaining a method of attaching a magnet according to an embodiment A diagram for explaining a method of attaching a magnet according to an embodiment AA sectional view of the structure shown in Figure 11 A diagram for explaining the operation of fitting the long hand portion of the pointer into the magnet fixture according to an embodiment A diagram for explaining the operation of fitting the long hand portion of the pointer into the magnet fixture according to an embodiment A diagram showing a configuration example of a rotation angle detection system according to an embodiment

Hereinafter, one embodiment will be described with reference to the drawings.

(Configuration of magnet fixture 100)
FIG. 1 is an external perspective view of a magnet fixture 100 according to one embodiment. FIG. 2 is a plan view of the magnet fixture 100 according to one embodiment. FIG. 3 is a side view of the magnet fixture 100 according to one embodiment. FIG. 4 is a front view of the magnet fixture 100 according to one embodiment. FIG. 5 is a bottom view of the magnet fixture 100 according to one embodiment. FIG. 6 is a perspective sectional view showing a cross section of the magnet fixture 100 taken along the line AA (see FIG. 3) according to one embodiment.

The magnet fixture 100 shown in FIGS. 1 to 6 is a member having a relatively thin and generally disc-shaped main body portion 100A. The magnet fixture 100 has a disk-shaped magnet 20 for detecting a rotation angle with respect to a rotation center portion 30A (a portion where a rotation shaft portion 32 is provided) of an analog meter pointer 30 (see FIGS. 7 to 9). (See FIGS. 7 to 9) is attached to the center of rotation 30A of the pointer 30 in order to fix it. The magnet fixture 100 is formed, for example, by injection molding an elastic resin material such as PP (polypropylene) resin. In the following description, for convenience, the direction along the rotation center AX2 of the rotating shaft portion 32 will be referred to as the up-down direction and the Z-axis direction, and the length direction of the long hand portion 36 of the pointer 30 will be referred to as the front-back direction and the X-axis direction. The width direction of the long hand portion 36 of 30 is defined as the left-right direction and the Y-axis direction.

As shown in FIGS. 1 to 6, the main body 100A of the magnet fixture 100 has a certain height and width at the center in the vertical direction (Z-axis direction), and has a shape parallel to the XY plane. A slit portion 102 is formed. The slit portion 102 is a portion in which a portion of the pointer 30 centered around the rotation center AX2 is accommodated. The slit portion 102 has an opening 102A at the end on the positive side of the Y-axis. Thereby, the rotation center portion 30A of the pointer 30 can be slid and inserted into the slit portion 102 through the opening portion 102A. The upper surface 102B and lower surface 102C of the opening 102A have a tapered shape such that the height and width of the opening 102A gradually increase toward the outside (positive side of the Y-axis). Thereby, the rotation center portion 30A of the pointer 30 can be easily inserted into the slit portion 102 through the opening portion 102A. Since the main body 100A of the magnet fixture 100 has the slit 102 formed, the upper wall 110 is located above the slit 102 (on the Z-axis positive side), and the main body 100A is located below the slit 102 (on the Z-axis negative side). ). The upper wall 110 and the lower wall 120 are both parallel to the XY plane and have a thin flat plate shape.

The upper wall portion 110 has a constant width in the front-rear direction (X-axis direction) from the left end (positive side of the Y-axis) toward the center AX1 at the center in the front-rear direction (X-axis direction). An upper slide groove 111 is formed with a notch extending in the left-right direction (Y-axis direction). In the upper slide groove 111, when the pointer 30 is slid through the slit portion 102, the cylindrical portion 34 (see FIGS. 7 and 8), which is provided to protrude upward at the rotation center portion 30A of the pointer 30, is inserted into the upper wall portion 110. It is formed so as not to interfere with the Therefore, the width of the upper slide groove 111 in the front-rear direction (X-axis direction) is larger than the diameter of the columnar portion 34.

Further, on the upper surface of the upper wall portion 110, an annular magnet holding portion 112 having a constant height is formed. The magnet holding part 112 is a part that holds the disc-shaped magnet 20 inside thereof. The height of the magnet holder 112 from the top surface of the upper wall 110 is approximately the same size as the thickness of the magnet 20, and the inner diameter of the magnet holder 112 is approximately the same size as the outer diameter of the magnet 20. Thereby, the magnet holding section 112 has the minimum necessary size, contributing to miniaturization of the main body section 100A. The inner circumferential edge 112A (that is, the upper opening) at the upper end of the magnet holder 112 has an inner diameter slightly smaller than the maximum outer diameter of the magnet 20. Therefore, the magnet holder 112 can fit the magnet 20 in while pushing the magnet 20 in from above and expanding the inner peripheral edge 112A. The magnet holding part 112 can hold the magnet 20 so that the magnet 20 does not easily fall off due to the inner peripheral edge 112A.

The lower wall portion 120 has a notch extending in the left-right direction (Y-axis direction) from the left end (positive side of the Y-axis) toward the center AX1 at the center in the front-rear direction (X-axis direction). A curved guide portion 121 is formed. The guide portion 121 prevents the rotating shaft portion 32 (see FIG. 7) of the pointer 30 from interfering with the lower wall portion 120 when the pointer 30 is slid through the slit portion 102, and also holds the rotating shaft portion 32 as the rotating shaft. It is formed to lead to the section 122. Therefore, the width of the guide portion 121 in the front-rear direction (X-axis direction) is larger than the diameter of the rotating shaft portion 32, except for the rotating shaft holding portion 122 and the rotating shaft regulating portion 124.

A rotating shaft holding portion 122 is formed at the center AX1 of the guide portion 121 to hold the rotating shaft portion 32 provided to protrude downward at the rotational center portion 30A of the pointer 30. The rotating shaft holding portion 122 has a circular shape when viewed from above. The inner diameter of the rotating shaft holding portion 122 is smaller than the diameter of the rotating shaft portion 32.

At the entrance of the rotating shaft holding part 122 in the guide part 121, a rotating shaft regulating part 124 is formed to prevent the rotating shaft part 32 from falling off from the rotating shaft holding part 122. The width of the rotating shaft regulating portion 124 is smaller than the diameter of the rotating shaft portion 32 and further smaller than the diameter of the rotating shaft holding portion 122.

Here, the guide section 121 includes a first elastic beam section 123A provided on the front side (X-axis positive side) of the guide section 121 and a first elastic beam section 123A provided on the rear side (X-axis negative side) of the guide section 121. This is a space sandwiched between the second elastic beam portion 123B and the second elastic beam portion 123B. That is, the wall surface on the front side (X-axis positive side) of the guide section 121 is formed as the first elastic beam section 123A, and the wall surface on the rear side (X-axis negative side) of the guide section 121 is formed as the second elastic beam section 123A. It is formed in the beam portion 123B.

The first elastic beam portion 123A and the second elastic beam portion 123B are elastically deformable in the front-rear direction (X-axis direction), and both ends in the left-right direction (Y-axis direction) are supported by the lower wall portion 120. There is.

As a result, in the magnet fixture 100 according to the embodiment, when the rotating shaft portion 32 is slid within the guide portion 121 toward the rotating shaft holding portion 122, the rotating shaft regulating portion 124 is pushed by the rotating shaft portion 32. The rotating shaft portion 32 can be fitted into the rotating shaft holding portion 122 while being expanded.

At this time, in the magnet fixture 100 according to one embodiment, the rotating shaft holding section 122 can be expanded by the rotating shaft section 32 to adjust the size to correspond to the diameter of the rotating shaft section 32. As a result, the magnet fixture 100 according to the embodiment reliably holds the rotating shaft portion 32 by the rotating shaft holding portion 122 without causing play between the rotating shaft holding portion 122 and the rotating shaft portion 32. be able to.

In addition, the rotating shaft holding section 122 has a variable diameter around the center AX1 by elastic deformation of the first elastic beam section 123A and the second elastic beam section 123B. The rotary shaft portion 32 can be held in accordance with the thickness.

Further, in the magnet fixture 100 according to one embodiment, the rotating shaft portion 32 held by the rotating shaft holding portion 122 is controlled by the rotating shaft regulating portion 124 provided at the entrance of the rotating shaft holding portion 122. It can be prevented from easily falling off from 122.

Note that the center of the rotating shaft holding part 122 and the center of the magnet holding part 112 both coincide with the center AX1 of the magnet fixture 100. Further, the center of the rotating shaft holding portion 122 coincides with the rotation center AX2 of the rotating shaft portion 32, regardless of the diameter of the rotating shaft portion 32. Therefore, the magnet fixture 100 according to one embodiment can make the rotation center AX2 of the rotary shaft portion 32 coincide with the center AX1 of the magnet fixture 100, regardless of the diameter of the rotary shaft portion 32, that is, It can be aligned with the center of the magnet 20. Therefore, the magnet fixture 100 according to one embodiment can suppress rotational wobbling of the magnet 20 due to rotation of the rotating shaft portion 32.

The magnet fixture 100 is provided to protrude outward (in the X-axis positive direction) from the outer peripheral edge of the main body 100A (upper wall 110), and prevents rotation of the pointer 30 with respect to the main body 100A (upper wall 110). A guideline regulating section 130 is provided.

Specifically, the pointer regulating portion 130 is provided so as to protrude forward (in the X-axis positive direction), which is the longitudinal direction of the long hand portion 36 of the pointer 30, from the outer peripheral edge on the front side (X-axis positive side) of the upper wall portion 110. and a tongue piece 132 extending from the upper surface of the protrusion 131 to the right (Y-axis negative direction), which is the width direction of the long hand 36 of the pointer 30. The tongue portion 132 can be elastically deformed in a direction parallel to the rotation center AX2 (Z-axis direction), and can press down the long needle portion 36 of the pointer 30 disposed below the tongue portion 132 from above. can.

Moreover, the tongue piece part 132 is provided to be inclined from the protrusion part 131 so that the gap 130A between the tongue part 132 and the protrusion part 131 gradually widens downward (in the negative direction of the Z-axis). As a result, the pointer regulating section 130 connects both ends in the width direction of the long hand section 36 of the pointer 30 disposed in the gap 130A to the first contact surface 131A exposed in the gap 130A of the protruding section 131 and the tongue piece section. 132 and a second abutting surface 132A exposed in the gap 130A.

(Configuration of structure 10)
FIG. 7 is an exploded perspective view of the structure 10 according to one embodiment. As shown in FIG. 7, the structure 10 according to one embodiment includes a magnet fixture 100, a magnet 20, and a pointer 30. The magnet fixture 100 can be attached to the pointer 30 by inserting the pointer 30 into the slit portion 102 so that the center AX1 of the magnet fixer 100 and the rotation center AX2 of the rotating shaft portion 32 of the pointer 30 coincide. It is attached.

The magnet 20 is attached to the magnet holder 112 of the magnet fixture 100 in order to detect the rotation angle of the pointer 30. By attaching the magnet 20 to the magnet holding part 112, the center 20A of the magnet 20 coincides with the center AX1 of the magnet fixture 100 and the center of the magnet 20 for rotation angle detection. The magnet 20 has a thin disk shape. The magnet 20 is magnetized into north and south poles, with a boundary line 20B passing through the center 20A of the magnet 20 as a boundary, in a plan view.

(Method of assembling structure 10)
Next, a method for assembling the structure 10 according to one embodiment will be described with reference to FIGS. 8 to 12. 8 and 9 are diagrams for explaining a method of attaching the magnet fixture 100 according to one embodiment. 10 and 11 are diagrams for explaining a method of attaching the magnet 20 according to one embodiment. FIG. 12 is a sectional view taken along line AA of the structure 10 shown in FIG.

First, as shown in FIG. 8, the rotation center portion 30A of the pointer 30 is inserted into the slit portion 102 through the opening portion 102A formed on the Y-axis positive side of the magnet fixture 100. Slide in the negative direction of the Y-axis. At this time, the rotating shaft portion 32 of the pointer 30 is slid in the negative direction of the Y-axis within the guide portion 121 between the first elastic beam portion 123A and the second elastic beam portion 123B. Also, at this time, the cylindrical portion 34 of the pointer 30 is slid in the negative direction of the Y-axis within the upper slide groove 111 formed in the upper wall portion 110.

When the rotating shaft portion 32 of the pointer 30 hits the rotating shaft restricting portion 124 in the guide portion 121, which is narrower than the rotating shaft portion 32, the rotating center portion 30A of the pointer 30 is further pushed in the Y-axis negative direction. . Thereby, the rotating shaft portion 32 of the pointer 30 can be fitted into the rotating shaft holding portion 122 while the rotating shaft restricting portion 124 is pushed apart by the rotating shaft portion 32 of the pointer 30 .

As a result, as shown in FIG. 9, the magnet fixture 100 is attached to the pointer 30 such that the center AX1 of the magnet fixture 100 and the rotation center AX2 of the rotating shaft portion 32 of the pointer 30 coincide.

Further, by performing the operation of fitting the rotating shaft portion 32 into the rotating shaft holding portion 122, the fitting operation of the pointer 30, which will be described later, is simultaneously performed. As a result, as shown in FIG. 9, the long hand part 36 of the pointer 30 is fitted into the gap 130A of the pointer regulating part 130, which is provided to protrude forward (in the X-axis positive direction) from the main body part 100A of the magnet fixture 100. . This restricts the rotation of the pointer 30 with respect to the main body 100A of the magnet fixture 100.

Furthermore, as shown in FIGS. 10 and 11, the magnet 20 for rotation angle detection is fitted into the magnet holding portion 112 of the magnet fixture 100. As a result, as shown in FIG. 11, in the magnet fixture 100, the center AX1 of the magnet fixture 100, the rotation center AX2 of the rotating shaft portion 32 of the pointer 30, and the center of the magnet 20 for rotation angle detection are aligned. The magnet 20 is attached to the magnet holder 112 so as to match.

Note that the explanation has been made in the order that the rotation angle detection magnet 20 is fitted into the magnet holding part 112 of the magnet fixture 100 after the operation of fitting the rotating shaft part 32 of the pointer 30 into the rotating shaft holding part 122; The magnet 20 for rotation angle detection may be fitted into the magnet holding part 112 of the magnet fixture 100 before the operation of fitting the rotating shaft part 32 into the rotating shaft holding part 122.

Here, as shown in FIG. 12, the height of the magnet holder 112 is approximately the same size as the thickness of the magnet 20, and the inner diameter of the magnet holder 112 is approximately the same size as the outer diameter of the magnet 20. Thereby, the magnet holding section 112 has the minimum necessary size, contributing to miniaturization of the main body section 100A.

Further, as shown in FIG. 12, the inner peripheral edge 112A (that is, the upper opening) at the upper end of the magnet holder 112 has an inner diameter slightly smaller than the maximum outer diameter of the magnet 20. For this reason, the magnet holder 112 is capable of fitting the magnet 20 by pushing the magnet 20 in from above and expanding the inner circumferential edge 112A. The magnet holding part 112 can hold the magnet 20 so that the magnet 20 does not easily fall off due to the inner peripheral edge 112A. In particular, since the inner peripheral edge 112A has a shape that holds the curved upper corner of the outer peripheral edge of the magnet 20, the magnet holding part 112 does not require a cover to cover the magnet 20, and therefore the thickness of the magnet 20 is reduced. It is the same size and height. Thereby, the magnet fixture 100 according to one embodiment is made thinner and smaller. For example, in this embodiment, the thickness of the magnet 20 is 1 mm, and the diameter of the magnet 20 is 20 mm. On the other hand, the thickness of the magnet fixture 100 is about 3 mm, and the length of one side of the magnet fixture 100 is about 23 mm.

In addition, the magnet fixture 100 according to one embodiment can attach various magnets 20 having different diameters and thicknesses by changing the shape of the magnet holding part 112.

(Insertion operation of the long hand portion 36 of the pointer 30)
13 and 14 are diagrams for explaining an operation of fitting the long hand portion 36 of the pointer 30 into the magnet fixture 100 according to one embodiment.

As shown in FIG. 13, when the rotation center portion 30A of the pointer 30 is slid in the Y-axis negative direction within the slit portion 102, and the rotation shaft portion 32 of the pointer 30 is fitted into the rotation shaft holding portion 122. The long hand portion 36 of the pointer 30 comes into contact with the inclined bottom surface 131B of the protruding portion 131 of the pointer regulating portion 130, which is provided to protrude forward (in the X-axis positive direction) from the main body portion 100A of the magnet fixture 100.

From here, when the rotation center portion 30A of the pointer 30 is further slid in the Y-axis negative direction within the slit portion 102, the long hand portion 36 of the pointer 30 is elastically deformed downward along the bottom surface 131B and moves in the Y-axis negative direction. move in the direction.

Then, when the long hand 36 of the pointer 30 gets over the bottom surface 131B, as shown in FIG. It is arranged in the gap 130A between the protrusion 131 and the protrusion 131.

As a result, as shown in FIG. 14, the long hand portion 36 of the pointer 30 has both ends thereof in the width direction (Y-axis direction) touching the first contact surface 131A exposed in the gap 130A of the protruding portion 131 and the tongue. It is held by the second contact surface 132A exposed in the gap 130A of the piece part 132.

In addition, since the width and height position of the gap 130A are variable due to elastic deformation of the tongue portion 132, the pointer regulating portion 130 can adjust the width and height of the long hand portion 36 to correspond to various widths and thicknesses of the long hand portion 36. Both ends of 36 in the width direction can be held.

(Example of configuration of rotation angle detection system 200)
FIG. 15 is a diagram illustrating a configuration example of a rotation angle detection system 200 according to an embodiment. As shown in FIG. 15, the rotation angle detection system 200 includes an analog meter 210, a rotation angle detection device 220, and a rotation angle transmitter 230.

The analog meter 210 includes a pointer 30 and a glass lid 211. In the analog meter 210, the magnet fixture 100 described in the embodiment is attached to the pointer 30. The analog meter 210 is, for example, a water meter, a power meter, a gas meter, or the like.

The rotation angle detection device 220 is attached to the center of the surface of the glass lid 211 (that is, the rotation center AX2 of the pointer 30). The rotation angle detection device 220 magnetically detects the rotation angle of the pointer 30 using a rotation angle detection sensor (not shown) provided opposite to the magnet 20 attached to the magnet fixture 100. The rotation angle detection device 220 then transmits a rotation angle detection signal indicating the detected rotation angle to the rotation angle transmitter 230 via a cable or wireless communication (eg, Bluetooth (registered trademark) wireless communication). For example, the rotation angle detection device 220 continuously detects the rotation angle of the pointer 30 at predetermined time intervals (for example, every n seconds), and outputs a rotation angle detection signal at a predetermined time interval (for example, every n seconds). It is continuously transmitted to the rotation angle transmitter 230.

The rotation angle transmitter 230 receives the rotation angle detection signal transmitted from the rotation angle detection device 220, and performs predetermined processing (for example, monitor display, (abnormality detection, recording, data transmission to other devices, etc.). For example, the rotation angle transmitter 230 transmits a rotation angle detection signal indicating the detected rotation angle to a gateway or a cloud via wireless communication (e.g., Bluetooth (registered trademark) wireless communication, Sigfox (registered trademark) wireless communication). Send to.

Further, the rotation angle detection device 220 may be supplied with power via a cable, for example, from a battery included in the rotation angle transmitter 230. In this case, the configuration associated with the rotation angle detection sensor of the rotation angle detection device 220 can be reduced to the minimum necessary, and the rotation angle detection device 220 can be configured to be more compact.

As described above, the magnet fixture 100 according to one embodiment is attached to the rotation center portion 30A of the pointer 30 of an analog meter, and is used to fix the disc-shaped magnet 20 for detecting the rotation angle. The body part 100A, the magnet holding part 112 which is provided on the upper surface of the body part 100A and holds the magnet 20 perpendicularly to the rotation center AX2 and on the rotation center AX2 of the pointer 30, and A slit portion 102 is formed in a planar shape perpendicular to the center AX2 and accommodates the rotation center portion 30A of the pointer 30, and a slit portion 102 is provided below the slit portion 102 in the main body portion 100A to hold the rotation shaft portion 32 of the pointer 30. and a pointer regulating section 130 that is provided to protrude outward from the outer peripheral edge of the main body 100A and regulates rotation of the pointer 30 with respect to the main body 100A.

As a result, the magnet fixture 100 according to the embodiment can be attached to the rotation center portion 30A of the pointer 30 for various pointers 30 having different diameters of the rotating shaft portion 32, etc., and the center of the magnet 20 can be fixed to the pointer. The magnet 20 can be fixed to the rotation center 30A of the pointer 30 while being aligned with the rotation center AX2 of the pointer 30. Moreover, since the magnet fixture 100 according to one embodiment holds the magnet 20 on the upper surface of the main body 100A, a cover covering the upper surface of the magnet 20 is not required, and the main body 100A can be made thinner. Therefore, according to the magnet fixture 100 according to one embodiment, the magnet 20 is easily and reliably fixed to the rotation center portion 30A of the pointer 30 with the center of the magnet 20 aligned with the rotation center AX2 of the pointer 30. It is possible to provide a thin magnet fixture 100 that has versatility and is capable of

Furthermore, in the magnet fixture 100 according to one embodiment, the main body 100A has a first elastic beam 123A and a second elastic beam 123B arranged opposite to each other on the lower side of the slit 102. However, the rotation shaft holding portion 122 is provided between the first elastic beam portion 123A and the second elastic beam portion 123B, and is rotated by the first elastic beam portion 123A and the second elastic beam portion 123B. By holding the shaft portion 32, the rotating shaft portion 32 is held.

As a result, the magnet fixture 100 according to one embodiment allows the center of the magnet 20 to be the center of rotation of the pointer 30 by simply having the rotating shaft holding section 122 hold the rotating shaft section 32 regardless of the diameter of the rotating shaft section 32. It can be matched with AX2.

Further, in the magnet fixture 100 according to one embodiment, the main body 100A has a rotating shaft holding portion extending from the outer peripheral edge of the main body 100A between the first elastic beam 123A and the second elastic beam 123B. The guide part 121 extends so that the width gradually becomes narrower toward 122 and guides the rotating shaft part 32 to the rotating shaft holding part 122.

Thereby, the magnet fixture 100 according to one embodiment can easily and reliably attach the rotating shaft portion 32 to the rotating shaft holding portion 122.

In the magnet fixture 100 according to one embodiment, the pointer regulating section 130 includes a protruding section 131 that is provided to protrude in the longitudinal direction of the pointer 30 from the outer peripheral edge of the main body section 100A, and a protruding section 131 that extends from the protruding section 131 to the pointer 30. It has a tongue portion 132 that extends in the width direction, is elastically deformable in a direction parallel to the rotation center AX2, and presses down the pointer 30.

As a result, in the magnet fixture 100 according to one embodiment, the tongue portion 132 is elastically deformed, so that the height position of the tongue portion 132 that presses the pointer 30 can be adjusted according to various thicknesses of the pointer 30. can be adjusted.

In the magnet fixture 100 according to one embodiment, the tongue piece portion 132 is separated from the protruding portion 131 so that the gap 130A between the tongue portion 132 and the protruding portion 131 gradually widens in a direction parallel to the rotation center AX2. The pointer regulating section 130 is provided at an angle, and the pointer regulating section 130 exposes both ends in the width direction of the pointer 30 disposed in the gap 130A to the first abutting surface 131A of the protruding section 131 exposed in the gap 130A. It is held by the second abutting surface 132A of the tongue piece 132.

As a result, in the magnet fixture 100 according to the embodiment, the width of the gap 130A is adjusted according to various widths of the pointer 30 by elastically deforming the tongue portion 132, and the width of the gap 130A is adjusted according to various widths of the pointer 30. can be retained.

Further, in the magnet fixture 100 according to one embodiment, the slit portion 102 has an opening 102A at the outer peripheral edge of the main body 100A, and the rotation center 30A of the pointer 30 is connected to the rotation center 30A of the pointer 30 from the opening 102A. The rotation center portion 30A of the pointer 30 can be accommodated in the slit portion 102 by sliding in a direction perpendicular to AX2.

Thereby, the magnet fixture 100 according to one embodiment can easily and reliably accommodate the rotation center portion 30A of the pointer 30 within the slit portion 102.

Further, the magnet fixture 100 according to one embodiment is integrally formed using an elastic resin material.

Thereby, in the magnet fixture 100 according to one embodiment, the portion to be elastically deformed can be easily and reliably formed integrally.

Moreover, the magnet fixture 100 according to one embodiment is formed by injection molding a resin material.

Thereby, the magnet fixture 100 according to one embodiment can be formed with higher precision.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to these embodiments, and various modifications or variations can be made within the scope of the gist of the present invention as described in the claims. Changes are possible.

10 Structure 20 Magnet 30 Pointer 30A Rotation center portion 32 Rotation shaft portion 34 Cylindrical portion 100 Magnet fixture 100A Main body portion 102 Slit portion 102A Opening portion 102B Top surface 102C Bottom surface 110 Upper wall portion 111 Upper slide groove 112 Magnet holding portion 112A Inner circumference edge Part 120 Lower wall part 121 Guide part 122 Rotation shaft holding part 123A First elastic beam part 123B Second elastic beam part 124 Rotation shaft regulation part 130 Pointer regulation part 130A Gap 131 Projection part 131A First contact surface 132 Tongue Piece 132A Second contact surface 200 Rotation angle detection system 210 Analog meter 211 Glass lid 220 Rotation angle detection device 230 Rotation angle transmitter AX1 Center AX2 Rotation center

Claims (8)

A magnet fixture for fixing a magnet for rotation angle detection, which is attached to the rotation center of an analog meter pointer,
The main body and
a magnet holding part that is provided on the upper surface of the main body and holds the magnet on the rotation center of the pointer;
a slit portion formed in a planar shape orthogonal to the rotation center in the main body portion, and in which a rotation center portion of the pointer is accommodated;
a rotating shaft holding part provided below the slit part in the main body part and holding the rotating shaft part of the pointer;
A magnet fixing device comprising: a pointer regulating section that is provided to protrude outward from an outer peripheral edge of the main body and that regulates rotation of the pointer with respect to the main body. The main body portion is
A first elastic beam part and a second elastic beam part are arranged opposite to each other below the slit part,
The rotating shaft holding part is
is provided between the first elastic beam part and the second elastic beam part, and the rotating shaft part is held between the first elastic beam part and the second elastic beam part, The magnet fixture according to claim 1, further comprising: a magnet fixture for holding the rotating shaft portion. The main body portion is
Between the first elastic beam part and the second elastic beam part, a width gradually narrows from the outer peripheral edge of the main body part toward the rotation shaft holding part, and the rotation The magnet fixture according to claim 2, further comprising a guide portion that guides the shaft portion to the rotating shaft holding portion. The Guidelines and Regulations Department:
a protrusion provided to protrude from the outer peripheral edge of the main body in the longitudinal direction of the pointer;
Claim 1, further comprising: a tongue piece extending from the protrusion in the width direction of the pointer, being elastically deformable in a direction parallel to the rotation center, and pressing down on the pointer. 3. The magnet fixture according to any one of 3 to 3. The tongue portion is
provided at an angle from the protrusion so that the gap between the protrusion and the protrusion gradually increases in a direction parallel to the rotation center;
The Guidelines and Regulations Department:
Both ends in the width direction of the pointer disposed in the gap are connected to a first contact surface of the protrusion exposed in the gap and a second contact surface of the tongue piece exposed in the gap. The magnetic fixture according to claim 4, wherein the magnetic fixture is held by. The slit portion is
The main body has an opening at the outer peripheral edge, and the rotation center of the pointer is slid through the opening in a direction perpendicular to the rotation center, and the rotation center of the pointer is inserted into the slit. The magnet fixture according to any one of claims 1 to 5, wherein the magnet fixture is capable of being accommodated. The magnet fixture according to any one of claims 1 to 6, characterized in that it is integrally formed using an elastic resin material. The magnet fixture according to claim 7, wherein the magnet fixture is formed by injection molding the resin material.

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