JP2006284220A - Measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring instrument capable of performing positioning by a boss part of a support and a through-hole of a dial and improving productivity. <P>SOLUTION: The measuring instrument is provided with the dial 2 provided with an indication part indicated by an indicator and a case 3 which is the support supporting the dial 2. The boss part 7 having a coming-off prevention protrusion 8 is formed on the case 3. The through-hole 4 through which the boss part 7 is inserted is formed on the dial 2, and a cutout 5 for making the coming-off prevention protrusion 8 be inserted therethrough is formed at the through-hole 4. The cutout 5 agrees with the coming-off prevention protrusion 8 so that the boss part 7 is inserted through the through-hole 4 of the dial 2. The dial 2 is rotated by a prescribed angle so as to be fixed to the case 3. The boss part 7 is provided with a protrusion 9 brought into contact with the through-hole 4 of the dial 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an instrument device employed in, for example, a vehicular instrument, and more particularly to an instrument device characterized by fixing a dial.

A dial plate fixing structure of a conventional instrument device includes a support body such as a light guide on the back surface of the dial plate, a boss portion having a retaining protrusion is formed at the center of the support body, and the dial plate A fitting hole with the boss part is provided, a notch for inserting the retaining protrusion into the fitting hole is formed, and the notch and the retaining protrusion are matched to fit the boss part with the dial. The dial was inserted into the hole, and the dial was rotated by a predetermined angle and fixed to the support (for example, see Patent Document 1).
Japanese Utility Model Publication No. 63-124621 (FIGS. 1 to 3)

  However, in the instrument device of Patent Document 1, positioning is performed by bringing the outer periphery of the boss portion into contact with the fitting hole excluding the notch in order to prevent the displacement of the fixed dial. For this reason, there is a problem that the contact area between the boss portion and the fitting hole is large and the dial is difficult to rotate. In addition, it is designed in consideration of tolerances so that it is inserted into the boss part and the fitting hole, but since the distance between the boss part and the fitting hole is narrowed, it is difficult to insert the boss part into the fitting hole. There was a problem of affecting productivity.

  Therefore, the present invention has been made in view of this point, and its main purpose is to perform positioning with the boss portion of the support and the through-hole of the dial, and to improve productivity. It is intended to provide an instrument device that can

  In order to achieve the above-mentioned object, the present invention comprises a dial plate provided with an indicator portion indicated by a pointer and a support body that supports the dial plate, and a boss portion having a retaining protrusion is formed on the support body. The dial is provided with a through-hole through which the boss portion is inserted, and a notch for inserting the retaining projection into the through-hole is formed, and the notch and the retaining projection are matched to form the boss portion. In an instrument device that is inserted into a through hole of the dial plate and rotated to a predetermined angle by rotating the dial plate by a predetermined angle, a protrusion that contacts the through hole of the dial plate is provided on the boss portion.

  Further, the protrusion is provided directly below the retaining protrusion.

  The projection is provided with an inclined portion.

  As described above, according to the present invention, an instrument device that can achieve the initial purpose, can be positioned by the boss portion of the support and the through hole of the dial, and can improve productivity. Can be provided.

  The instrument device 1 according to the present invention includes a dial plate 2 having an indicator portion indicated by a pointer, and a case 3 that is a support for supporting the dial plate 2, and a boss portion having a retaining protrusion 8 on the case 3. 7 is formed, the dial 2 is provided with a through hole 4 through which the boss 7 is inserted, and a notch 5 is formed through which the retaining projection 8 is inserted, and the notch 5 and the retaining projection 8 are matched. In the instrument device in which the boss portion 7 is inserted into the through hole 4 of the dial plate 2 and the dial plate 2 is rotated by a predetermined angle and fixed to the case 3, the protrusion 9 that contacts the through hole 4 of the dial plate 2 on the boss portion 7. Is provided. With this configuration, the dial 2 can be positioned by the boss 7 of the case 3 and the through hole 4 of the dial 2, and the boss 7 of the case 3 can be positioned in the through hole of the dial 2. Since the dial 2 is easy to rotate because it can be easily inserted into the ring 4 and the rotation after insertion has a small contact area, the instrument device 1 capable of improving productivity can be provided.

  Further, the projection 9 is provided directly below the retaining projection 8. With this configuration, the retaining protrusion 8 and the protrusion 9 are inserted through the notch 5 of the through hole 4, so that an independent notch 5 through which the retaining protrusion 8 and the protrusion 9 are inserted is formed. There is no need, and the shape of the notch 5 of the through hole 4 of the dial 2 can be simplified, and the shape of the boss portion 7 can also be simplified, thereby suppressing an increase in cost. Can do.

  Further, the projection 9 is provided with an inclined portion 9a so that the dial 2 can be easily rotated and brought into contact with the projection 9. With this configuration, the dial plate 4 rides on the protrusions 9 and easily rotates during rotation after insertion, so that the instrument device 1 capable of further improving productivity can be provided.

  A first embodiment of the present invention will be described below with reference to FIGS.

  The instrument device 1 of the present invention includes a dial 2 and a case 3 serving as a support that supports the dial 2.

  The dial 2 has a through hole 4 at the center thereof. An unillustrated pointer shaft serving as a rotating shaft of the pointer is inserted through the through hole 4, and a boss portion provided in the case 3 described later is also inserted through the through hole 4. The through hole 4 is formed with a notch 5 in which the through hole 4 is expanded in the outer peripheral direction. Three notches 5 are provided, each having an interval of 120 degrees. Therefore, in the through hole 4, the notch 5 is a large-diameter arc 5a, and the portion where the notch 5 is not provided is a small-diameter arc 4a. In addition, an indicator portion (not shown) indicated by the pointer is provided on the surface of the dial plate 2. Note that the indicator section includes a scale, characters, symbols, and the like. A hole 6 provided on the upper right side of the dial 2 serves to prevent the dial 2 from rotating and to determine its position.

  In this embodiment, the case 3 is made of an opaque white synthetic resin. The case 3 includes a cylindrical boss portion 7. The tip of the boss 7 is provided with a retaining protrusion 8 protruding in the outer peripheral direction. Further, a protrusion 9 is provided directly below the retaining protrusion 8, that is, on the outer periphery of the boss part 7 on the base side of the boss part 7. The projection 9 is smaller than the outer diameter of the retaining projection 8 and is substantially equivalent to the small-diameter arc 4a of the through-hole 4 of the dial 2, and the projection 9 contacts the small-diameter arc 4a of the through-hole 4. Is. Moreover, this protrusion 9 is provided with the inclination part 9a. The inclined portion 9 a is inclined with respect to a line passing through the center of the cylindrical boss portion 7. In addition, the code | symbol 10 of case 3 is a pin fitted to the hole 6 of the dial 2, and when the pin 10 is fitted to the hole 6, the dial 2 is prevented from rotating and positioned. Is.

  The outer diameter of the boss portion 7 is smaller than the smaller arc 4 a of the through hole 4 of the dial 2, and the outer diameter of the retaining protrusion 8 of the boss portion 7 is also equal to the through hole of the dial 2. The diameter of the four cutouts 5 is smaller than the large-diameter arc 5a. Therefore, in the state shown in FIG. 1, the boss portion 7 provided with the retaining protrusion 8 can be inserted without contacting the through hole 4 provided with the notch 5.

  In order to fix the dial 2 to the case 3, as shown in FIG. 1, the notch 5 and the retaining protrusion 8 are matched, and the boss 7 is inserted into the through hole 4 of the dial 2. Next, the dial 2 is rotated from the state of FIG. 1 by a predetermined angle, in this embodiment, clockwise by 60 degrees and fixed to the case 3 (see FIG. 2 for the fixed state). In this state, the retaining projection 8 of the boss 7 can suppress the arc 4a portion having a small diameter of the through hole 4 and fix the dial 4.

  By rotating the dial 2, the small-diameter arc 4 a of the through-hole 4 of the dial 2 comes into contact with the protrusion of the boss 7, and the through-hole 4 of the dial 2 and the boss 7 of the case 3 Positioning can be performed. Further, the dial 2 and the case 3 (boss portion 7) are brought into contact with each other only by the small diameter arc 4a and the projection 9 of the through hole 4, and the contact area is small, so that the dial 2 is easily rotated. be able to. Further, by providing the protrusion 9 with the inclined portion 9a, when the dial 2 is rotated, the small-diameter arc 4a of the through hole 4 can easily ride on the protrusion 9 and rotate, thereby further improving productivity. Can be made.

  In this embodiment, the case 3 is made of an opaque white synthetic resin. However, the case 3 is not limited to the above-described embodiment, and is made of, for example, a transparent synthetic resin. It may be provided with a function as a light guide for guiding to a plate or a pointer.

  In this embodiment, since the projection 9 is provided immediately below the retaining projection 8, the retaining projection 8 and the projection 9 are inserted through the notch 5 of one through hole 4. There is no need to provide independent notches 5 for the protrusion 8 and the protrusion 9, the shape of the notch 5 of the through hole 4 of the dial 2 can be simplified, and the shape of the boss portion 7 is also simple. Therefore, an increase in cost can be suppressed.

  In order to achieve the object of the present invention, the present invention is not limited to the above-described embodiment in which the protrusion 9 is provided directly below the retaining protrusion 8, and for example, the second embodiment shown in FIGS. As described above, the protrusion 19 may be provided in a portion adjacent to the bottom of the retaining protrusion 8. In addition, the through hole 4 of the dial 2 is provided with a second notch 15 integrally with a notch 5 through which the retaining protrusion 8 is inserted. The second notch 15 is formed so that the protrusion 19 does not come into contact with the through hole 4 when the boss portion 7 is inserted into the through hole 4. Even in such a structure, the dial 2 can be positioned by the boss 7 of the case 3 and the through hole 4 of the dial 2, and the boss 7 of the case 3 can be positioned by the through hole 4 of the dial 2. Since the dial 2 is easy to rotate because the rotation after insertion is small in contact area, the instrument device 1 capable of improving productivity can be provided. Reference numeral 19 denotes an inclined portion equivalent to that in the first embodiment.

  In the second embodiment, the projection 19 is provided so as to be adjacent to the retaining projection 8. However, the present invention is not limited to the above embodiment, and the projection 19 may be provided apart from the retaining projection 8. Good. In this case, the second notch 15 is also formed away from the notch 5.

It is a top view before the dial plate fixation of 1st Example of this invention. It is a top view after the dial plate fixation of the Example. It is sectional drawing of the AA line in FIG. It is sectional drawing of the BB line in FIG. It is sectional drawing of CC line in FIG. It is sectional drawing of the DD line in FIG. It is a top view before the dial plate fixation of 2nd Example of this invention. It is a top view after the dial plate fixation of the Example. It is the side view seen from the arrow E direction in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument apparatus 2 Dial 3 Case 4 Through-hole 4a Small diameter arc 5 Notch 5a Large diameter arc 6 Hole 7 Boss part 8 Retaining protrusion 9, 19 Protrusion 9a, 19a Inclined part 10 Pin 15 2nd notch

Claims (3)

A dial having an indicator portion indicated by a pointer; and a support that supports the dial; and a boss having a retaining protrusion is formed on the support, and the boss is inserted into the dial. Providing a through-hole and forming a notch through which the retaining projection is inserted into the through-hole, matching the notch and the retaining projection, and inserting the boss portion into the through-hole of the dial, An instrument device in which a dial is rotated by a predetermined angle and fixed to the support body, wherein the boss portion is provided with a protrusion that comes into contact with a through hole of the dial. The instrument device according to claim 1, wherein the protrusion is provided directly below the retaining protrusion. The instrument device according to claim 1, wherein the protrusion is provided with an inclined portion.

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