JPH0592648U - Instrument pointer - Google Patents

Abstract

(57) [Summary] [Structure] In the pointer 1 made of a synthetic resin, the outside of the pointer shaft is secured to the inside of the shaft hole 4 formed in the engaging portion 5 so that the pointer 1 has sufficient strength to be press-fitted and held. The main press-fitting hole 6 having a diameter smaller than the diameter is provided, and the temporary press-fitting hole 7 having a diameter smaller than the outer diameter of the pointer shaft 3 and larger than the main press-fitting hole 6 is continuous with the main press-fitting hole 6. Instrument pointer provided on the insertion side of the shaft hole 4. [Effect] By providing the main press-fitting hole portion and the temporary press-fitting hole portion in the pointer shaft hole, it becomes possible to adjust the reference point at the position of the temporary press-fitting hole portion when the pointer is driven, and other special reference point adjusting means. Since it is not necessary, adjustment work and the number of adjustment devices can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved structure of a measuring instrument needle that is press-fitted and fixed to an end portion of a pointer shaft provided in a movable portion of an indicating instrument.

[0002]

[Prior Art]

 Conventionally, as a guide for this type of instrument, it is common to mold it with a synthetic resin material because it is easy to manufacture when the pointer is quantified and the shape of the pointer is taken into consideration. The pointer formed by is press-fitted and fixed to the pointer shaft of the indicating instrument. In this case, a shaft hole is formed in the engaging portion of the pointer for press-fitting the pointer shaft, and the inner diameter dimension of this shaft hole is formed from the insertion side to the deepest part with almost the same inner diameter dimension. The pointer shaft is press-fitted and fixed.

At this time, the reference point of the indicating instrument, for example, the speedometer, tachometer, etc. of the vehicle, etc., is the zero point display position, and in the case of the liquid level gauge, the direction of the indicator portion of the pointer is based on the E point scale position. If the pointer is press-fitted into the pointer shaft with setting, the strength of the press-fitting is so strong that the pointer is easily held in a state where it cannot rotate with respect to the pointer shaft.

Therefore, for example, when the pointing position of the pointing portion of the pointer deviates from the reference point position of the pointing instrument, the movable portion side of the pointing instrument is moved to the pointing position of the pointing portion by mechanical fine adjustment means. In order to correct the deviation or as another fine adjustment means, the reference point position is set to the set position by fine adjustment of the variable resistor etc. in the electric indicator.

[0005]

[Problems to be solved by the device]

 Therefore, it is necessary to have an individual mechanical or electrical reference point adjusting means to prevent the reference point position from being displaced when the pointer is pressed in, so the number of parts is increased due to the configuration, and the component configuration is likely to be complicated. There is a face.

In order to avoid this point, it is conceivable to finely adjust the direction of the indicator while rotating the above-mentioned pointer fixedly press-fitted on the pointer shaft with respect to the pointer shaft. There is also a problem that it is difficult to perform the adjustment due to the high value, and there is also a problem that if the adjustment work is performed many times, the press-fitting strength is likely to decrease.

[0007]

[Means for Solving the Problems]

 The shaft hole formed in the pointer engaging part is provided with a main press-fit hole that is smaller than the outer diameter of the pointer shaft on the inner side of the inner surface of the shaft hole, and is smaller than the outer diameter of the pointer shaft. A temporary press-fitting hole having a diameter larger than that of the press-fitting hole is provided continuously to the main press-fitting hole on the insertion side of the shaft hole.

[0008]

[Action]

 When the pointer is pressed into the pointer shaft, the reference point adjustment operation can be performed at the position of the temporary press-fitting hole.

[0009]

【Example】

 1 and 2 show a first embodiment of the present invention. The pointer 1 is made of a resin material, and the pointer 1 is an indicator portion 2 for instructing a follow-up operation of an indicator value (not shown), and a shaft hole that is press-fitted and fixed to a metal pointer shaft 3 formed in the indicator. 4 and a columnar engaging portion 5 having a cylindrical shape. As the movable part of the indicating instrument (not shown), for example, a moving magnet type instrument, an eddy current type instrument, a moving coil type instrument, etc. are applied, and there is no particular limitation. The inner surface of the shaft hole 4 has a main press-fitting hole portion 6 having a smaller diameter than the pointer shaft 3 and a diameter larger than the main press-fitting hole portion 6 in order to have sufficient strength for press-fitting and holding the pointer at the inner side of the hole. It is composed of a temporary press-fitting hole portion 7 having a diameter smaller than the outer diameter of the pointer shaft 3. In this case, when the pointer shaft 3 is press-fitted into the temporary press-fitting hole portion 7, the temporary press-fitting hole portion is maintained so that the direction of the indicator portion 2 of the pointer 1 can be easily adjusted from the outside with respect to the pointer shaft 3. The inner diameter of 7 is set.

In this embodiment, the columnar engagement portion 5 has a provisional press-fitting hole portion 7 having an outer diameter smaller than that of the main press-fitting hole portion 6 to provide a thin portion 8 to prevent a sink mark during molding. By preventing this, the dimensional accuracy of the inner diameter of the temporary press-fitting hole portion 7 is improved.

When pressing the pointer shaft 3 into the shaft hole 4 of the pointer 1, first, the pointer shaft 3 is inserted into the temporary press-fitting hole portion 7. At this time, since the force of the pointer shaft 3 for expanding the temporary press-fitting hole portion 7 is small and the frictional force is also small, the direction of the indicating portion 2 of the pointer 1 can be easily changed from the outside with respect to the pointer shaft 3. . In this temporary press-fit state, fine adjustment is performed so that the direction of the indicator 2 coincides with the position that is the reference point of the indicator (not shown), and after performing the adjustment operation between the pointer 1 and the pointer shaft 3, By further pressing force to press the pointer shaft 3 into the main press-fitting hole portion 6, the pointer shaft 3 and the pointer 1 are press-fitted and fixed with sufficient strength to hold the pointer 1.

Therefore, the orientation of the pointer 1 with respect to the pointer shaft 3 can be easily adjusted at the position of the temporary press-fitting hole portion 7 provided in the shaft hole 4 of the engaging portion 5, and an appropriate state can be obtained after this adjustment. With this, the pointer shaft 3 can be easily press-fitted into the main press-fitting hole portion 6 while the orientation of the indicating portion 2 of the pointer 1 is fixed.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, the chamfered portion 9 is provided at the inlet of the shaft hole 4, that is, at the opening end of the temporary press-fitting hole portion 7 provided in the shaft hole 4. The chamfered portion 9 serves as a guide when inserting the pointer shaft 3. Therefore, there is an effect that the shaft hole 4 can be easily guided to the pointer shaft 3.

4 (a) and 4 (b) show an embodiment of a pointer shaft used in the present invention. In FIG. 4 (a), an arcuate portion 3A is formed at the tip of the pointer shaft 3, and FIG. In b), a conical portion 3B is formed at the tip of the pointer shaft 3, and the pointer shaft 3 is made sharp as shown in this embodiment so that the pointer can be easily inserted. Further, it may have both the structures of the embodiments shown in FIGS. 3 and 4.

[0015]

[Effect of the device]

 As described above, by providing the main press-fitting hole and the temporary press-fitting hole in the pointer shaft hole, the direction of the pointer indicating part with respect to the pointer shaft, that is, the reference point position, can be easily adjusted at the temporary press-fitting hole position when the pointer is driven. It is possible to adjust the direction of the indicator part of the pointer, and after this adjustment, by pressing the pointer shaft into the main press-fitting hole, it is possible to drive the pointer that exactly matches the reference point. Therefore, since no special adjusting means for the reference point is required, the number of adjusting works and adjusting devices can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of the first embodiment of the present invention before the pointer and the pointer shaft are assembled.

FIG. 3 is a sectional view of an essential part showing a pointer and a pointer shaft of the second embodiment of the present invention before they are assembled.

FIG. 4 is a side view of each of the pointer axes used in the present invention.

FIG. 5 is a cross-sectional view of a main part of the conventional pointer before the pointer and the pointer shaft are assembled.

[Explanation of symbols]

 1 pointer 2 indicator part 3 pointer shaft 3A arcuate part 3B conical part 4 shaft hole 5 engaging part 6 main press-fitting hole part 7 temporary press-fitting hole part 8 thin part 9 chamfered part

Claims (1)

[Scope of utility model registration request] 1. A pointer composed of an indicator portion for giving a follow-up operation instruction in accordance with an instruction value of the indicator instrument, and a columnar engagement portion having a shaft hole press-fitted and fixed to a pointer shaft formed in the instrument. The indicator part and the engaging part are made of resin integrally or separately, and the shaft hole formed in the engaging part has enough strength to press and hold the pointer inside the inner surface of the shaft hole. In order to keep it, a main press-fitting hole that is smaller than the outer diameter of the pointer shaft is provided, and a temporary press-fitting hole that is smaller than the outer diameter of the pointer shaft and larger than the main press-fitting hole is also used. A pointer for an instrument characterized by being provided on the insertion side of the shaft hole in a continuous manner with the section.