JPH0416905Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a device for fixing an indicating instrument, for example, for assembling and fixing an indicating instrument such as a pointer display device or a liquid crystal display installed in a car, motorcycle, etc. with a printed circuit board. This invention relates to a fixing device for an indicating instrument.

[Prior Art] Generally, as shown in FIG. 4, this type of indicating instrument has a moving coil type instrument 1, such as a speedometer or a tachometer, assembled and fixed at the bottom of an instrument case 2.
A printed circuit board 4 on which circuit components 3 and the like for the operation of the moving coil type instrument 1 are assembled is inserted and held in an engaging groove 5 provided at the bottom of the instrument case 2 on the side of the moving coil type instrument 1 or by screws. It's stuck.

However, as mentioned above, since the printed circuit board 4 is arranged on the side of the indicating instrument such as the moving coil type instrument 1, when a lighting device or other instruments such as an oil pressure gauge or a fuel gauge are installed on the side of the indicating instrument. It is necessary to secure a space for assembling the indicating instrument and the printed circuit board 4, and the housing space of the instrument case becomes relatively large, which is not in keeping with the trend toward miniaturization of this type of instrument.

Therefore, as known from, for example, Japanese Utility Model Application Publication No. 58-56488, a printed circuit board is arranged and fixed parallel to the bottom of the case, and a display unit is arranged directly on the top surface of the printed circuit board. By screwing the unit to the rib provided at the bottom of the case through the printed circuit board and tightening the display unit and the printed circuit board together, a display that efficiently accommodates the printed circuit board and display unit in the case is created. The implementation structure of the unit is disclosed.

[Problems to be solved by the invention] In the conventional example, since the printed circuit board and the display unit are screwed together individually, it is difficult to connect the ribs and holes for screw insertion provided in the printed circuit board during assembly. The screw holes provided in the display unit must be aligned and screwed, and the multiple screw insertion holes provided in the display unit must be aligned and screwed in with the screw holes provided in the rib. There was a problem in that the assembly workability was poor because alignment with the screw hole for insertion and work of turning and tightening the screws had to be performed.

Therefore, the present invention is designed to house and arrange an instrument body and a printed circuit board within an instrument case.
To provide a fixing device for an indicating instrument which can stably incorporate a printed circuit board into the lower part of an instrument body and facilitate assembly work in a device for housing and arranging a printed circuit board.

[Means for Solving the Problems] The present invention provides an indicating instrument in which an instrument body and a printed circuit board are housed in an instrument case, in which the instrument body is formed by an instrument movable part and a housing that houses the movable part. A frame-shaped holder is disposed below the instrument body, surrounds the edge of the printed circuit board, and supports the printed circuit board, and a coupling pin is attached to one of the holder and the housing, and a connecting pin is attached to one of the holder and the housing. a vertical hole is formed in the holder, the housing of the meter body is disposed in the upper part of the holder, and the coupling pin and the vertical hole are inserted and engaged to integrally form the holder and the meter body into a unit; The holder and the meter body are fixed to the bottom of the meter case.

[Function] The printed circuit board is supported in the holder of the frame lock, the holder is placed at the bottom of the housing of the instrument body, and the coupling pin is inserted into the vertical hole and engaged, thereby assembling the holder and the instrument body into one piece. By assembling and fixing the unitized holder and meter body to the meter case, the storage space becomes relatively small, and the printed circuit board is protected by the holder.

[Example] As shown in FIGS. 1 to 3, the instrument body 11 of a moving coil instrument, for example, has a housing 1 made of synthetic resin.
2 is provided with two terminals 13, 13a for inputting a current according to the measured value of the printed circuit board 29, and the terminals 13, 13a are provided with two terminals separated between the insulating plates 14, respectively.
One end of the two whiskers 15, 15a is fixed, and these whiskers 15, 15a have a pointer 16 at the tip.
The needle 1 is wound around the pointer shaft 17 to which the pointer 1 is attached.
The other end is a hollow angle that is held in the coil holder 18 through two pins 19, 19a that are erected on the coil holder 18 that interlocks with the pointer shaft 17. An upper yoke 22 made of a magnetically conductive material is located in the hollow part of the coil frame 20, and a lower yoke 22 made of a magnetically conductive material is located at the lower end of the housing 12. A side yoke 23 is located, and a magnet 2 is placed between the upper yoke 22 and the lower yoke 23.
4 is arranged to form a magnetic closed circuit of the magnet 24, the upper yoke 22, and the lower yoke 23, and the pointer 16 is rotated to a balanced position according to the amount of current applied to the winding 21 to indicate the amount to be measured. It is formed.
Further, a pair of vertical holes 25, 25a are formed in both sides of the housing 12 in a penetrating state, and a pair of female screw portions 26, 26a are provided. The holder 27 is formed into a frame shape with its plane surface being approximately the same shape and size as the housing 12 of the instrument body 11, and a recess 28 is formed on one side of the holder 27.
A locking pawl 30 that locks on the top surface of the printed circuit board 29 is elastically provided on the outside of the recess 28, and a lifting prevention hook that locks on the top surface of the printed circuit board 29 is provided on the inner wall of the other side. Furthermore, in this embodiment, a stepped portion 31 on which the printed circuit board 29 is placed is provided along almost the entire circumference of the inner wall of the holder 27 to match the height of the lower portion of the recessed portion 28. Further, coupling pins 32 and 32a are respectively erected at locations of the holder 27 corresponding to the vertical holes 25 and 25a of the housing 12, and the coupling pins 32 and 32a have diameters at the portions that protrude from the vertical holes 25 and 25a. Large portions 33, 33a are formed, and cut grooves 34, 34a are provided vertically to allow temporary fixation. Further, on the other side of the holder 27, a positioning protrusion 38 is formed to protrude and fit into a positioning groove 37 formed on the instrument body 11 side. Female screw portion 2 of housing 12
6, 26a are insertion holes 36, 3 into which fixing screws 35, 35a of the instrument body 11 are inserted.
6a is provided.

Then, one end of the printed circuit board 29 is placed on the stepped portion 31 so as to engage with the lifting prevention protrusion 30a of the holder 27, and the other end of the printed circuit board 29 is elastically held by the locking pawl 30. The printed circuit board 29 is assembled integrally with the holder 27 by being locked in the state placed in the recess 28. The holder 27 accommodates the instrument body 11 and the printed circuit board 29 by inserting the coupling pins 32 and 32a provided in the holder 27 into the vertical holes 25 and 25a of the instrument body 11 and fitting the positioning groove 37 and the protrusion 38.
It is intended to incorporate the following. In this case, when the engaging pins 32, 32a are inserted into the vertical holes 25, 25a, the large diameter portions 33, 33a of the engaging pins 32, 32a are urged inward by the cut grooves 34, 34a and protrude back to their original state. Return to and lock. The meter main body 11 and the holder 27 that accommodates the printed circuit board 29, which are integrated in such a locked state, are assembled and fixed to the bottom of the meter case 39.

In this way, in the present invention, the engagement pins 32, 32a of the holder 27 and the vertical hole 2 of the housing 12 are
The holder 27, which supports the printed circuit board 29 by engagement with the holders 5 and 25a, and the housing 12, in which the instrument body 11 is integrally assembled, are integrated into a unit. By assembling and fixing to the bottom of the instrument case 39, it becomes possible to assemble the holder 27 and the instrument body 11 all at once to the instrument case 39 without having to attach them individually, thereby simplifying the assembly work. At the same time, there is no need for a space for the printed circuit board 29 on the side of the instrument body 11, making it possible to install lighting, other oil pressure gauges, and fuel gauges close to the indicating instrument, making it possible to downsize the overall configuration. becomes.
Furthermore, the printed board 29 can be surrounded and protected by the frame-shaped holder 27, and is placed on the mounting step 31 and fixed by the locking claws 30 and projections 30a, thereby preventing inconveniences such as wobbling or movement. can also be resolved.

[Effects of the invention] The present invention provides an indicating instrument in which an instrument body and a printed circuit board are housed in an instrument case, in which the instrument body is formed by an instrument movable part and a housing that houses the movable part, and the instrument body A frame-shaped holder is disposed below the printed circuit board, surrounds the edge of the printed circuit board, and supports the printed circuit board, and a coupling pin is provided in one of the holder and the housing, and a vertical hole is provided in the other. The housing of the instrument main body is disposed on the upper part of the holder, and the coupling pin and the vertical hole are inserted and engaged to form an integral unit of the holder and the instrument main body. By fixing the indicator to the bottom of the instrument case, it is possible to respond to the trend of miniaturization of this type of indicator instrument, simplify the installation work, and also protect the printed circuit board. A fixation device for the instrument can be provided.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of the present invention, Fig. 2 is a perspective view showing an exploded state of the indicator and holder, Fig. 3 is an exploded perspective view showing the printed circuit board assembled in the holder, and Fig. 4 is an exploded perspective view showing the state in which the printed circuit board is assembled into the holder. FIG. 2 is a sectional view showing a conventional example. 11... Instrument body, 12... Housing, 2
5, 25a...provided in the holder 27 in the vertical hole, 27...holder, 32, 32a...coupling pin, 29...printed circuit board, 39...instrument case.

Claims (1)

[Scope of utility model registration request] In an indicating instrument in which an instrument body and a printed circuit board are housed in an instrument case, the instrument body is formed by a movable section of the instrument and a housing containing the movable section, and the above-mentioned printed circuit board is arranged below the instrument body. A frame-shaped holder is provided surrounding the edge of the board to support the printed circuit board, a coupling pin is formed in one of the holder and the housing, a vertical hole is formed in the other, and the While arranging a housing for the instrument body, the coupling pin and the vertical hole are inserted and engaged to integrally form the holder and the instrument body into a unit, and the holder and the instrument body are fixed to the bottom of the instrument case. A fixing device for an indicating instrument characterized by: