JPH0528929U - Indicator instrument - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an indicating instrument which prevents damage to terminal pins such as a step motor assembled to a frame body during assembly work and is excellent in assembly workability. [Structure] A pair of temporary stop claws 68, 68 are provided on the lower part of the frame body 21 so as to project downward, and the temporary stop claws 68, 68 are engaged with the receiving holes 72 for fixing the frame body 21. 72 is drilled on the circuit board 69. Further, a step motor 57 that drives the display wheel 28 is attached to the frame body 21. Then, the frame body 21 is fixed to the circuit board 69 before being fixed to the pair of temporary fixing claws 68 and the supporting legs.
It is supported on three lines such as 75 and stably placed on the work line, etc., so that each member can be easily assembled from above the frame body 21 that is placed straight, and after assembly. Also, the frame body 21 does not rattle, and the frame body 21 is further inclined to prevent the terminal pins 43 and 58 from being damaged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a pair of temporary fixing claws are provided on the lower part of the frame body for assembling the step motor downward, and the temporary fixing claws are engaged with the receiving holes of the circuit board to connect the frame body to the circuit board. Regarding the indicating instrument fixed to.

[0002]

[Prior Art]

 As this kind of conventional indicating instrument, a total counter of a totalizer, a reset counter, a step motor for driving these, and a cross coil type movable magnet type instrument that serves as a speedometer are integrated into a frame body. Mounting legs are provided on the frame body so as to project downward and are screwed to the legs to assemble the frame body to a circuit board that constitutes a drive circuit for the step motor and the movable magnet type instrument. It is known to be fixed. By the way, in order to fix the frame body to the circuit board, after the through hole formed in the circuit board and the leg portion are aligned with each other, a screw is inserted into the through hole and fixed. In order to facilitate this fixing work, it is conceivable to temporarily fix the frame body to the circuit board in advance, and an example thereof will be described with reference to FIG. In FIG. 7, the indicating instrument is provided with projecting side walls 2 and 3 in which a total counter and a reset counter (not shown) are arranged in parallel on the upper portion of a base portion 1 having a substantially rectangular shape. The mounting portions 2A and 3A for inserting and supporting the support shaft of the above are provided, and the step motor 4 for driving both counters is mounted on the side portion of the base portion 1 located between the side walls 2 and 3, and the base portion is attached. A frame body 8 made of a synthetic resin is provided in the center of 1 and is provided with an opening 7 into which an upper end of a cover 6 of a movable magnet type instrument serving as a speedometer 5 is inserted. The speedometer has a tubular portion 9 integrally provided from the bobbin main body of the cross coil type movable magnet type instrument, which serves as the speedometer 5, protruding upward, and the pointer shaft 10 is provided from the hole at the upper end of the tubular portion 9. Display plate 12 mounted on top of both counters A plurality of mounting legs 1A are provided on the lower part of the base part 1 so as to project downward, and further, a pair of temporary fixing claw parts 13, 13 temporarily fixed to a circuit board (not shown) are arranged downward. Project toward. Then, the tips of the temporary locking claws 13, 13 are inserted into the receiving holes of the circuit board (not shown), and the engaging stepped portions 14 of the temporary locking claws 13 are hooked on the rear surface of the circuit board to form the frame body 1. Temporarily fix and fix.

[0003]

[Problems to be solved by the device]

 In the above-mentioned indicator of the prior art, after the frame body 8 is temporarily fixed to the circuit board by the temporary fixing claw portion 13, it can be easily fixed by screwing it to the mounting leg portion 1A. When the frame body 8 before being fixed to the circuit board is placed on a work table or the like by the pair of temporary fixing claw portions 13 and 13 extending downward from the portion 1A to assemble the respective parts, the frame body 8 is fixed. There is a problem that is tilted. Therefore, in the above-mentioned indicating instrument, when each member of the total counter, the reset counter, and the display plate 12 is assembled from above the frame body 8, there is a demerit that the assembly work is likely to decrease if the frame body 8 is inclined. Further, there is a problem that the end of the display plate 12 comes into contact with the mounting surface even after the assembling and the coated surface is damaged. Further, since the frame body 8 is conveyed in the assembling line in a tilted and unstable state, the frame body 8 rattles when the line is moved or stopped, which adversely affects each part after the assembly. There is also the problem of giving. In addition, in this type of instrument, there is a tendency that an electric drive unit such as a step motor or a movable magnet type instrument and an electric connection with a circuit board are connected by a terminal pin provided in the drive unit, and the frame body 8 tilts. As a result, the terminal pins protruding from the bottom of the stepping motor and the movable magnet type instrument are damaged, resulting in poor connection. Particularly, the relatively heavy stepping motor 4 is attached to the side part of the frame body 8. There is a problem that the frame body 8 tilts toward the motor 4 side and the terminal pins of the step motor are easily damaged.

Therefore, an object of the present invention is to provide an indicating instrument which prevents damage to a terminal pin of a step motor or the like in an assembling work and is excellent in assembling workability.

[0005]

[Means for Solving the Problems]

 In the present invention, a step motor and a display wheel driven by the step motor are assembled to a frame body, and a pair of temporary stop claws are provided on the lower part of the frame body so as to project downward. In an indicating instrument for fixing the frame body to the circuit board by locking the frame body to the receiving hole formed in the circuit board, a support for supporting the frame body together with the pair of temporary fixing claws under the frame body. It has protruding legs.

[0006]

[Action]

 With the above configuration, the frame body before being assembled to the circuit board is supported by three pairs of the temporary fixing claw portion and the supporting leg, and is stably placed on the workbench or the like.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 5 show a first embodiment of the present invention, in which a frame body 21 made of synthetic resin or the like in which an integrator unit and a speedometer unit are incorporated has a substantially rectangular shape. The base portion 22 has side walls 23 and 24 projecting from both sides of the base portion 22 so as to face each other, and a frame-shaped connecting portion 25 projecting from the center of the base portion 22. There is. An inner-pinion type total counter 26 and an inner-pinion type reset counter 27 which constitute the integrating unit are arranged in parallel at the upper ends of the side walls 23 and 24 via the connecting portion 25. .. A plurality of display wheels 28 are rotatably supported on the support shafts 26A and 27A of the counters 26 and 27, and the counters 26 and 27 are provided in notch grooves 29 opened at the upper ends of the side walls 23 and 24, respectively. Both ends of the support shafts 26A and 27A are inserted from above and fixed by heat welding or the like. Further, a zeroing member 30 for aligning the reset counter 27 with zeroing is attached to a mounting portion 31 having a support shaft 30A formed on the side wall 24.

The speedometer unit comprises a speedometer 32 using a cross-coil type movable magnet type meter, and the speedometer 32 has a cavity portion in an upper bobbin 33 and a lower bobbin 34 made of synthetic resin which can be divided into upper and lower parts. A movable magnet 36 is formed in the hollow portion 35 and a damper oil (not shown) is injected into the hollow portion 35 to fix the pointer shaft 37 at the center of the movable magnet 36 and fix the pointer shaft 37. The lower end portion of is supported by the lower bobbin 34. In addition, the upper and lower bobbins 33, 34 are integrally formed with leg portions 38 at adjacent corner portions on one side thereof, and leg portions 40 having terminal mounting portions 39 at adjacent corner portions on the other side. A metal magnetic shield case 42 is inserted and arranged from below the lower bobbin 34 in an arc-shaped case insertion groove 41 which is vertically formed in the lower portion of the both leg portions 38 and 40. ing.

Two press-fitting holes 44 for press-fitting the elongated terminal pins 43 are formed in the terminal mounting portion 39 so as to be aligned with each other, and two terminals are respectively formed in the press-fitting holes 44 from the upper part of the terminal mounting portion 39. A pin 43 is press-fitted to extend through the terminal pin 43, and the terminals of a pair of coils 45 and 46 wound in a cross shape around the outer peripheral portions of the upper and lower bobbins 33 and 34 are electrically connected to the upper portion of the terminal pin 43. It continues. A mounting base 47 is provided on each of the leg portions 38 and 40 so as to project outward, and an opening 48 formed at the center of the base portion 22 of the frame body 21 is provided with a speedometer 32. The upper side is inserted and arranged, and the mounting base 47 is fixed on the mounting base 47 with screws 49, the speedometer 32 is fixed to the frame body 21, and the upper end of the terminal pin 43 of the speedometer 32 is fixed. It is arranged close to the lower surface of the terminal retaining wall 22A provided on the base portion 22.

The connecting portion 25, which is located above the opening 48 of the frame body 21 and is formed between the counters 26 and 27, has its lower portion connected to the base portion 22. A mounting seat 51 on which the display plate 50 is placed is projected from the upper surface of the connecting portion 22, and the display plate 50 is fixed on the frame body 21 by screws 52. Further, a hole 53 is formed on the upper surface of the connecting portion 25 for inserting the pointer shaft 37 of the movable magnet type instrument serving as the speedometer 32, and the upper end portion of the pointer shaft 37 is pivotally supported by the hole 53. There is. Further, the upper end side of the pointer shaft 37 is arranged so as to pass through a hole 54 provided in the display plate 50, and a finger 55 is fixed to the tip which is the upper end portion of the pointer shaft 37. The measurement amount is indicated and displayed by comparison with a display unit (not shown) of the plate 50.

Reference numeral 56 denotes a storage box which is located between the counters 26 and 27 and is arranged beside the connecting portion 25 of the frame body 21 and which houses a step motor 57 for driving the counters 26 and 27. The storage box 56 is integrally united with a step motor 57 and a plurality of gears for transmitting the rotation from the step motor 57, and the terminal pins 58 of the step motor 57 are integrated into the storage box. It is projected downward from the bottom of 56. Further, a notch-shaped opening 59 having substantially the same size as the outer shape of the storage box 56 is provided on one side wall 23, 24 of the frame body 21 located on the lower digit side of the counters 26, 27. A storage space 60 for the storage box 56 is formed from the opening 59 to the inner side of the frame body 21. In addition, a pair of barriers 61 are provided at the upper end of the side wall 23 of the frame body 21 through the opening 59, and the upper ends of the barrier walls 61 are connected between the barrier walls 61 and the frame body 21. A reinforcing portion 62 is continuously provided so as to bridge the portion 25, and further, a pair of elastically deformable locking claws 63 are provided on the lower surface of the frame body 21 so as to project downward. It locks on the lower surface of the storage box 56. Then, the storage box 56 is inserted into the storage space 60 from below, and then the storage box 56 is fixed to the mounting boss portion 64 protruding from the rear surface of the base portion 22 with the screw 65, By assembling the step motor 57 to the frame body 21 through the storage box 56, the output gear 66 and the counters 26 that are rotated and transmitted from the step motor 57 exposed to the outside of the storage box 56. , 27 and the drive gears 26B and 27B provided at the lowermost digit, relay the rotation of the step motor 57 through each gear, and feed the digits sequentially from the lowest digit display wheel 28 to the upper digit display wheel 28. And the mileage is displayed.

The frame body 21 is provided with a plurality of mounting leg portions 67 and a pair of temporary fixing claw portions 68 projecting downward from the lower surface of the base portion 22. A circuit board 69 to which 21 is attached and fixed is provided with a through hole 71 into which a screw 70 screwed to the attachment leg portion 67 is inserted and a receiving hole 72 into which the temporary fixing claw portion 68 is locked. A circuit pattern 73 is formed on the rear surface of the circuit board 69. A connector 74, into which the terminal pins 43 and 58 are inserted and connected, is mounted on the circuit board 69 by soldering or the like. Further, one end of the locking claw 63 extends downward and a supporting leg 75 having a length equal to that of the temporary fixing claw portion 68 is projected. Further, the circuit board 69 is formed with a through hole 76 into which the tip of the support leg 75 is inserted.

As shown in FIG. 5, the frame body 21 before being assembled to the circuit board 69 has a pair of temporary fixing claw portions 68, 68 and a supporting leg 75 on the mounting surface S of the work line. The frame body 21 is supported and stably placed, so that the frame body 21 does not rattle due to movement or stop of the work line, and also from above the frame body 21 placed in a stable state. Since the components such as the display wheels 28 and the display plate 50 can be assembled, and the frame body 21 does not tilt, the terminal pins 43 and 58 located below the base portion 22 come into contact with the mounting surface S. Therefore, the electrical connection with the circuit board 69 can be satisfactorily performed using the terminal pins 43 and 58, and the end portion of the display board 50 does not come into contact with the mounting surface S.

As described above, in the present embodiment, the step motor 57 and the display wheel 28 driven by the step motor 57 are assembled to the frame body 21, and a pair of provisional parts are provided at the lower part of the frame body 21 downward. An indicator instrument for fixing the frame body 21 to the circuit board 69 by projecting the stop claw portions 68, 68 and locking the temporary stop claw portions 68, 68 with the receiving holes 72, 72 formed in the circuit board 69. In addition, since the support leg 75 for supporting the frame body 21 is projected from the lower portion of the frame body 21 together with the pair of temporary fixing claws 68, 68, the frame body 21 before being assembled to the circuit board 69 is a pair. It is stably supported by the three temporary stop claws 68, 68 and the supporting leg 75, and by this, the respective members can be easily assembled from above the frame body 21 which is placed straight. Even after assembly, the frame body 21 does not rattle on the mounting surface S and stable assembly can be performed. Further, unlike the conventional case, the frame body 21 is inclined and each terminal pin 43, 58 located below the base portion 22 does not contact the mounting surface S. Good electrical connection with the subsequent circuit board 69 can be achieved. Further, as an effect of the embodiment, by providing the support legs at one place, in the case of supporting by four or the like, there is a possibility that one may float and rattle due to dimensional error, but a pair of temporary fixings. Since the frame body 21 is supported by the three claws 68, 68 and the support leg 75, the frame body 21 is stably placed with all three grounded.

Further, in this embodiment, the frame body 21 is provided on the base plate 22 with side walls 23 and 24 for fixing the support shafts 26A and 27A of the display wheels 28 of the pair of counters 26 and 27 facing each other. An opening 59 for mounting the storage box 56 of the step motor 57 is formed on the side walls 23, 24, and a locking claw 63 for fixing the storage box 56 is provided at the lower part of the opening 59, and the lower end of the locking claw 63 is provided. The support legs 75 are formed by extending downward, and the frame body 21 can be molded and molded more easily than in the case where the support legs 75 are separately formed on the frame body 21. Further, since the support leg 75 is located near the relatively heavy step motor 56, the load of the step motor 56 can be reliably supported.

FIG. 6 shows a second embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. The example shown is provided on the end side of 23, and thus the support leg 75 can be provided at an appropriate position on the frame body 21.

As described above, in the present embodiment, the step motor 57 and the display wheel 28 driven by the step motor 57 are assembled to the frame body 21, and a pair of provisional parts are provided at the lower part of the frame body 21 downward. An indicator instrument that fixes the claw portions 68, 68 in a projecting manner and locks the temporary claw portions 68, 68 in the receiving holes 72 formed in the circuit board 69 to fix the frame body 21 to the circuit board 69, Since the supporting leg 75A for supporting the frame body 21 is provided at the lower portion of the frame body 21 together with the pair of temporary fixing claws 68, 68, the terminal pins of the step motor and the like in the assembly work are prevented from being damaged, Moreover, the workability of assembling is excellent, and the same operation and effect as in the first embodiment can be obtained.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present invention. It can be selected. The indicator is not limited to a speedometer, but can be applied to various types such as a tachometer, a fuel gauge, etc. Furthermore, only one totalizer or reset counter is installed in the frame body. A counter mechanism such as an hour meter may be used.

[0019]

[Effect of the device]

 According to the present invention, a step motor and a display wheel driven by the step motor are assembled to a frame body, and a pair of temporary fixing claw portions are provided at the lower part of the frame body so as to project downward. In an indicating instrument for fixing the frame body to the circuit board by locking the frame body to the receiving hole formed in the circuit board, a support for supporting the frame body together with the pair of temporary fixing claws under the frame body. Since the legs are projectingly provided, it is possible to prevent damage to the terminal pins of the step motor or the like in the assembling work, and to provide an indicating instrument excellent in assembling workability.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 4 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 5 is a side view showing a first embodiment of the present invention in a state of being placed on an assembly line.

FIG. 6 is a side view showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

 21 Frame 23, 24 Side wall 28 Display wheel 56 Storage box 57 Step motor 59 Opening 63 Locking claw 68 Temporary stop claw 69 Circuit board 75, 75A Support leg

Claims (2)

[Scope of utility model registration request] 1. A step motor and a display wheel driven by the step motor are assembled to a frame body, and a pair of temporary stop claw portions are provided at a lower portion of the frame body so as to project downward. In an indicating instrument for fixing the frame body to the circuit board by locking the frame body to the receiving hole formed in the circuit board, a support leg supporting the frame body together with the pair of temporary fixing claw portions on the lower part of the frame body. Indicating instrument characterized by protruding. 2. The frame body is provided on the base plate with side walls for fixing the pair of support shafts of the display wheels facing each other, and the side walls are formed with an opening for mounting a storage box of the step motor, An indicating instrument characterized in that a locking claw for fixing the storage box is provided at a lower portion of the opening, and a lower end of the locking claw extends downward to constitute the support leg.